WO2003042742A1

WO2003042742A1 - Equipment for inspecting groove of spiral spacer for bearing optical fiber

Info

Publication number: WO2003042742A1
Application number: PCT/JP2001/009945
Authority: WO
Inventors: Kazuyuki Kawasaki; Hidenobu Nagaya
Original assignee: Ube-Nittou Kasei Co., Ltd.
Priority date: 2001-11-14
Filing date: 2001-11-14
Publication date: 2003-05-22
Also published as: TW528896B; JPWO2003042742A1; CN1559016A; CN1284992C; KR20040053308A; KR100816318B1

Abstract

An equipment for inspecting the grooves of a spiral spacer for bearing optical fibers provided, in the outer circumference thereof, with a plurality of spiral grooves running continuously while reversing the rotational direction at a specified angular interval, comprising a rotator rotating as the spacer travels, a section for detecting abnormality of a sliding spiral groove based on the rotational resistance of the rotator, and a section for detecting the pitch of the spiral groove based on the rotational angle of first and second rotators and the traveling speed of the spacer for bearing optical fibers. The abnormality detecting section comprises a guide rail extending linearly, a supporting member provided slidably on the guide rail, the first rotator supported rotatably by the supporting member, and a load detector coupled through a magnetic force attraction means for separating the load detector when a force of a specified level or above is applied to the supporting member.

Description

Description Spiral spacer groove inspection device for supporting optical fiber

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a groove inspection device for a spiral spacer for holding an optical fiber, and more particularly, to an optical fiber holding surface having a plurality of spiral grooves whose rotation direction changes at every predetermined angle and which runs continuously. The present invention relates to a groove inspection apparatus for continuously measuring and inspecting an inner surface abnormality of a spiral groove, a spiral pitch, and a reversal angle while manufacturing a spiral groove. Background art

As is well known, optical fibers have a low transmission loss and a very large transmission amount, and their practical use has been promoted over a wide range in the field of communication.When installing multiple optical fibers in a cable, Uses a spacer in which a spiral groove for supporting the optical fiber is formed on the outer circumference as a cable core wire, and inserts the optical fiber into this spiral groove to avoid stress such as tension, compression, and bending. are doing.

Here, the spiral groove of this type of spacer is provided so that the outer circumference goes around from one side to the other, and the outer circumference is inverted at a predetermined angle, for example, at an interval of 360 degrees. What is provided is provided. In the former spiral groove, when an optical fiber is inserted into the groove, the bobbin around which the optical fiber is wound must be rotated, and a considerably large rotating equipment is required, which increases the equipment cost. . In addition, there is a problem that it is difficult to split the optical fiber midway after the cable is formed.

On the other hand, in the latter inverted thread groove, it is easy to take out the branch from the middle of the cable, and it is not necessary to rotate the bobbin around which the optical fiber is wound, and no rotating equipment is required. Although the cost is low, especially in the spiral groove of this type, the direction of the groove is reversed every predetermined angular interval. Abnormality is likely to occur in the groove shape at the part.

If there is an abnormality such as a small bump on the inner peripheral surface of the spiral groove, or if the groove pitch or reversal angle fluctuates, troubles such as the inability to stably store the optical fiber in the groove when making a cable. However, even if a cable can be used, an unnecessary portion acts on the optical fiber to cause an increase in transmission loss due to the abnormal portion during use, thereby adversely affecting the transmission characteristics of the optical fiber.

From this point of view, in particular, the latter, in which the inverted spiral groove is provided, is required to have no groove abnormality over its entire length and to have strict dimensional accuracy in the groove pitch and the inverted angle.

Therefore, conventionally, a rotating body that rotates with the movement of the optical fiber supporting spacer is mounted in the middle of the manufacturing process, and based on the difference in the rotating resistance of the rotating body, the inner surface abnormality of the spiral groove is detected. I was

However, such a conventional spiral groove anomaly inspection apparatus can detect an abnormal portion such as a small bump on the inner peripheral surface of the spiral groove, but can detect the abnormality. There has been a problem that it is not possible to measure and detect whether or not the screw pitch and the reversal angle of the reversal spiral groove, for which high precision is required, are accurately formed.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and has as its object to solve the problem, in particular, of the abnormal shape of a spiral groove that reverses at a predetermined angular interval and the groove pitch and the reverse angle. An object of the present invention is to provide an apparatus for inspecting a groove abnormality of a spiral spacer for supporting an optical fiber, which can accurately detect fluctuations at the same time during a manufacturing process. Disclosure of the invention

In order to achieve the above object, the present invention provides an optical fiber supporting spacer in which a rotation direction is reversed at predetermined angular intervals and a plurality of spiral grooves running continuously are provided on the outer periphery. A spiral groove inspection device, comprising: a rotating body that rotates with the travel of the optical fiber supporting spacer; a groove abnormality detecting unit that detects a groove abnormality of the spiral groove that slides in contact with the rotational resistance of the rotating body; Of rotating body A groove pitch and groove reversal angle measuring unit for detecting a groove pitch of the spiral groove from a rotation angle and a running speed of the optical fiber supporting spacer is provided.

In the present invention, the groove abnormality detection unit includes a guide rail extending linearly, a support member slidably provided on the rail, and the rotating body rotatably supported by the support member. In addition, a load detector coupled via a magnetic attraction means that separates when a force equal to or more than a predetermined value is applied to the support member can be provided.

The rotating body has a through-opening through which the spacer for holding the optical fiber is passed, and a pin gauge having a tip portion fitted into the spiral groove is provided around the opening. be able to.

The load detector can be constituted by a sealed load cell. Further, the groove pitch and groove reversal angle measuring unit of the present invention includes: a speed pulse generator that generates a signal corresponding to the advance amount of the soother; the rotating body fitted into the spiral groove; A rotation angle signal corresponding to the rotation angle, a rotation direction determination signal that has been delayed or advanced by a predetermined angle from the rotation angle signal, and a single rotation pulse signal associated with one rotation of the spiral groove are generated as the rotation body rotates. Receiving the rotation angle and rotation direction discrimination signal to determine the reversal position of the spiral groove, and the pulse of the speed pulse generator and the rotation angle signal between the adjacent reversal positions. And a calculating device for calculating the groove pitch and the groove reversal angle of the spiral groove.

In addition, the pulse generator includes a pair of first and second pulse generators and a third pulse generator that are arranged at a predetermined interval along a traveling direction of the optical fiber supporting spacer. A rotation direction discrimination unit for receiving the rotation direction discrimination signal of each pulse generator and discriminating the rotation direction of the spacer for holding the optical fiber; and providing a rotation direction discrimination unit for the first and second pulse generators. The time when the rotation direction discrimination signal coincides is set as a condition for starting the counting of the rotation angle signal of the third pulse generator, and the rotation angle of the third pulse generator is detected, and after the counting of the rotation angle signal is started. Before the inflection point detected after the elapse of the predetermined time It is possible to determine the inverted position and the arithmetic unit. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an external view of a main part of a spiral spacer to be inspected by a groove inspection device of a spiral spacer for carrying an optical fiber according to the present invention.

FIG. 2 is a cross-sectional view of the spiral spacer shown in FIG.

FIG. 3 is an overall layout diagram of a groove inspection device of a spiral spacer for supporting an optical fiber according to the present invention.

FIG. 4 is an explanatory diagram of a main part of FIG.

FIG. 5 is an enlarged view of a main part of FIG.

FIG. 6 is a block diagram of an electric system of the groove abnormality detecting section shown in FIG.

FIG. 7 is a flowchart of a processing procedure of the operation display unit shown in FIG.

FIG. 8 is a detailed view of the groove pitch and groove reversal angle measuring unit shown in FIG.

FIG. 9 is a configuration diagram of an arithmetic unit of the groove pitch and groove reversal angle measuring unit shown in FIG.

FIG. 10 is a flowchart of a groove inversion angle calculation processing procedure executed by the calculation device shown in FIG.

FIG. 11 is an explanatory diagram for obtaining a peak value and a bottom value in the flowchart of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail based on examples. In the groove inspection apparatus 1 for a spiral spacer for holding an optical fiber according to the present invention, the spiral spacer A shown in FIGS. 1 and 2 is to be inspected.

The spiral spacer A shown in these figures has a tensile strength line A 1 disposed at the center and a synthetic resin main body A 2 formed on the outer periphery thereof. You.

The main body portion A 2 has a plurality of concave spiral grooves A 3 that are inverted at a predetermined rotation angle 2 ct along the longitudinal axis direction and continuously run, and each of the spiral grooves has a concave section. A is formed at a predetermined groove inversion pitch p, and the inner surface abnormality of the spiral groove A3 and the groove inversion pitch p are measured and inspected.

In the case of the present embodiment, as shown in FIG. 3, the groove inspection device 1 is a pair of grooves provided in the middle of the manufacturing process of the threaded spacer A traveling in the direction of the arrow in FIG. It is provided between the take-off machines 14, 14, and comprises a groove abnormality detecting section 2 installed on the housing 24, and a groove pitch and groove inversion angle measuring section 10.

A pair of guide roller devices 26 having the same configuration is provided on the housing 24 so as to sandwich the groove abnormality detection unit 2 and the groove pitch and groove inversion angle measurement unit 10. As shown in detail in FIG. 4, each guide roller device 26 is composed of four cross-girder rollers 26a to 26d that sandwich the spiral spacer A from four directions.

The guide roller device 26 configured in this way is capable of detecting the vertical and horizontal vibrations when the spiral spacer A is pulled by the puller 14 by the groove abnormality detector 2 and the groove pitch and groove reversal angle measuring unit 1. The _c- groove anomaly detector 2, which is designed so as not to appear as a measurement error of 0, is disposed in front of the groove pitch and groove reversal angle measurement unit 10 and is a spiral spacer for holding an optical fiber. A basic configuration is provided with a rotating body 3 that rotates as the vehicle travels along A, and detects a groove abnormality of the spiral groove A 3 that is in sliding contact from the rotation resistance of the rotating body 3.

As shown in FIG. 5, the groove abnormality detecting section 2 of the present embodiment is fixed to a housing 24 and installed on a guide rail 4 extending linearly. On the guide rail 4, a support member 5 force S of the rotating body 3 and a slide movable along the longitudinal axis direction of the guide rail 4 are provided.

The support member 5 is fitted on the guide rail 4 and slidably provided on a slide base 5a, and a vertical support plate 5 supported on the slide base 5a and extending vertically upward. has b. The upper part of the vertical support plate 5b is rotatably supported about a horizontal axis via a disc-shaped rotating body 3 force S and a bearing 6. The rotating body 3 has a central part of a disk-shaped main body 3a, through which a spiral sensor A running between a pair of take-off machines 14 and 14 provided in the middle of a manufacturing process is passed. A circular through-opening 3b is formed.

On the inner peripheral side of the through-opening 3 b of the rotating body 3, the number of pin gauges 3 c corresponding to the number of the spiral grooves A 3 is fixed with screws S and screws, and the distal end side of each pin gauge 3 c is provided with the through-opening 3 b It protrudes inward.

Each of the pin gauges 3 c has a projecting shape corresponding to the shape of the spiral groove A. The shape relationship between the spiral groove A 3 and the pin gauge 3 c is set such that the wall forming the spiral groove A 3 of the spiral spacer A and the outer surface of the gauge 3 c are in a state close to the close contact state. ing.

On the other hand, on the side of the guide rail 4, a sealed load cell (load detector) 7 that converts the magnitude of the load into an electric signal and sends it out is disposed near the support member 5. I have.

As is well known, a typical example of the load cell 7 is a strain gauge and a strain gauge type in which a strain-generating column connected to the strain gauge is enclosed in a case. For example, this strain gauge type is adopted.

The load cell 7 and the slide table 5 a are connected by a connecting member 8. The connecting member 8 includes a first connecting portion 8a fixed to the slide table 5a and a second connecting portion 8b fixed to the load cell 7 side.

In the case of the present embodiment, a permanent magnet is built in the second connecting portion 8b, and the first connecting portion 8a is made of a metal material that can be attracted by this magnet. The portion 8a is adsorbed to the second connecting portion 8b.

In the groove abnormality detection unit 2 configured as described above, when the spiral spacer A travels, the rotating body 3 is fitted into the spiral groove A 3, and therefore, the rotating body 3 includes the spiral spacer A. As the vehicle travels, it rotates in the same direction as the rotation direction of the spiral groove A3 while reversing at predetermined angular intervals. At this time, the rotating body 3 becomes a load with respect to the traveling of the spiral spacer A, and the slide table 5a supporting the rotating body 3 is guided by the traveling of the spacer A. Attempts to move rearward on rail 4.

The horizontal acting force at this time is transmitted to the load cell 7 via the first and second connecting portions 8a and 8b, and as a result, the load cell 7 is driven by the spiral spacer A The load is transmitted in the same direction as the direction.

Here, the connecting member 8 for transmitting the acting force of the slide base 5a to slide and move to the load cell 7 is formed by the first and second connecting portions 8a and 8b attracted by the permanent magnet. It is configured.

For this reason, if the attraction force of the permanent magnet is set so that the coupling between the first and second connecting portions 8a and 8b is released when a force of a predetermined value or more acts on the rotating body 3, When a groove abnormality occurs, it is possible to prevent the detection device 2 from being damaged.

On the other hand, as shown in FIG. 6, the load cell 7 is electrically connected to the operation display 9b via the amplifier 9a. The operation display 9b is composed of a so-called personal computer, and includes an interface, a memory, an input keyboard, and the like. The operation display 9b is connected to a display 9c and an alarm 9d. I have.

In the case of the present embodiment, the operation display 9b detects the groove abnormality of the spiral groove A3 according to the procedure shown in FIG. 7 using the load detection value R sent from the load cell 7 as an input signal. .

In the procedure shown in FIG. 7, first, when the procedure starts, in step 1, initial settings are performed. In this initial setting, a danger value R max that determines that the spiral groove A 3 is abnormal is set for the load detection value R detected by the load cell 7.

This risk value R max is derived from past experience values, averages of actually measured values, and the like. When the setting of the dangerous value R max is completed, in step 2, the load detection value R of the load cell 7 is acquired, and the value is displayed on the display 9c as a measured value. Next, in step 3, it is determined whether the load detection value R is greater than the danger value Rmax. If the load detection value R is smaller than the danger value Rmax, the groove is determined in step 4 in step 4. Judgment is made as to whether or not measurement of abnormality is to be completed.

On the other hand, if it is determined in step 3 that the load detection value R is larger than the dangerous value R max, it means that an abnormality has occurred in the spiral groove A 3, so that in step 5, Activate the alarm 9d to warn of this, display the length of the spacer A at the time of occurrence of the abnormality, and return to step 4. In the groove abnormality detection unit 2 configured as described above, when the spiral spacer A is run in a state of passing through the through-opening 3b of the rotating body 3, the spiral groove A of the spiral spacer A 3 The rotational resistance of the rotating body 3 is converted into the rotating force of the rotating body 3 by the sliding resistance of the rotating body 3 fitted into the spiral groove A3 and the pin gauge 3c, and the slide table 5a is formed together with the sliding force. A horizontal force acts to move this rearward on the guide rail 4.

This horizontal force is transmitted to the load cell 7 via the connecting member 3 attracted and connected by the magnet. The load cell 7 detects a load corresponding to the horizontal force, converts it into a load detection scale, converts it into an electric signal, and outputs it to the operation display 9b.

The operation indicator 9 b monitors the state of the spiral groove A of the threaded spacer A based on the output signal of the load cell 7, and based on the magnitude of the load detection value R, the inner surface of the spiral groove A 3 Detect abnormalities.

In this case, when the groove abnormality of the spiral groove A 3 is extremely large, the running resistance of the rotating body 3 becomes extremely large, but in that case, the running drag exceeds the attraction force of the permanent magnet, As a result, the connection between the first and second connecting portions 8a and 8b of the connecting member 8 is lost, and the slide table 5a is allowed to move backward, and the support member 5, the rotating body 3 and other components are allowed. And the load cell 7 will not be damaged.

In this case, when the slide base 5a moves rearward when the slide base 5a abuts on the proximity switch 5c, the drive of the take-off machine 14 is stopped to ensure safety. To keep it.

On the other hand, as shown in FIG. 3, the groove pitch and groove inversion angle measuring unit 10 includes a speed pulse generator 16, a pair of first and second rotating bodies 17 and 18, and a first rotating body. The first and third pulse generators 19 and 21 are provided above the first rotating body 17, the second pulse generator is provided above the second rotating body, and the arithmetic unit 22 is generally configured.

The speed pulse generator 16 generates a pulse signal corresponding to the travel of the spacer A, and is installed in the take-off machine 14 in front.

The first and second rotating bodies 17 and 18 have substantially the same configuration, and are provided at predetermined intervals along the traveling direction of the spiral spacer A. 17 and 18 are fitted into the spiral groove A 3 of the spiral spacer A and rotate as the spacer A advances, and are disposed between the take-off machines 14 and 14 ′. It is provided on the installed housing 24.

FIG. 8 shows the details of the first rotating body 17. The configuration of the first and second rotating bodies 17 and 18 is completely the same except that the third pulse generator is mounted on the first rotating body 17. A description will be given by taking the first rotating body 17 provided on the side as a representative.

The first rotating body 17 shown in the figure includes a hollow cylindrical main body 17b with a gear 17a fitted and fixed to the outer peripheral portion, and a plurality of pins 17c.

The pin 17c has a distal end fitted and inserted into the spiral groove A3 of the spacer A. The pin 17c is recessed in a flange portion of the main body 17b, and is inserted into a radiation groove pointing in the center direction. It is fixed with screws.

The first rotating body 17 is rotatably supported by a holder 30 provided with a through hole for the spacer A. The holder 30 is supported by support legs 32, and the support legs 32 are fixed on the housing 24.

The first pulse generator 19 and the third pulse generator 21 are mounted and supported on a flange 34 fixed to the upper end of the holder 30, and the rotation axis of the first pulse generator 19 is The driven gear 191, which is in mesh with the gear 17a, has a driven force S, and the rotating shaft 21 of the third pulse generator 21 has a driven gear 191, The corresponding driven gear 2 1 1 is fixed.

When the spacer A advances, the first pulse generator 19 and the second pulse generator 20 rotate the rotating bodies 17 and 18 accordingly, and rotate the rotating bodies 17 and 18. The rotation is further performed, and the angle signals θ 1 and 02 are respectively transmitted. When these angle signals match, the SZ pitch signal (match signal) s is output from the comparator 30.

The determination of the condition that the angle signals 0 1 and Θ 2 match is made by an absolute value that does not consider the direction, and a pair of first and second rotating bodies 17 and 18 are installed at a predetermined interval. Therefore, as shown in Fig. 12 below, the first and second rotating bodies 17 and 18 are equally spaced on both sides of the peak and bottom values (i, iii). At the point (ii) where the first and second rotating bodies 17 and 18 are equally spaced on both sides with respect to the center of,, and 0, the SZ pitch signal s is output from the comparator 30 respectively. It will be.

The configuration diagram of the arithmetic unit 22 is shown in FIG. The arithmetic unit 22 shown in the figure has a CPU 22a, a high-speed counter unit 22b, an input unit 22c, an output unit 22d, and a DZA conversion unit 22e. ing.

The output signals of the first and second pulse generators 19 and 20 are input to the input unit 22 c via the comparator 30 and the groove pitch provided in the housing 24. The display 34 and the groove reversal angle display 36 are connected.

Each of these display sections 34 and 36 is capable of displaying a current measured value, a set value, and a permissible value. Further, in response to the angle signals 01 and 02 sent from the first and second pulse signal generators 19 and 20, a coincidence signal s is generated for each inversion pitch of the optical fiber supporting spacer A. The comparator 30 is connected to the input unit 22c.

The third pulse generator 21 is connected to the input unit 22c via the direction determining unit 22f for transmitting the rotation direction determining signal f. Further, the third pulse generator 21 is connected to the high-speed counter unit 22b, and is connected to the input unit 22c via the high-speed counter unit 22b. Have been.

The speed pulse generator 16 is connected to the input unit 22c. The output unit 22 d has an SZ waveform recorder via a pitch printing printer 40, a reverse angle printing printer 41, an alarm 46, and a D / A conversion unit 22 e. 4 2 are connected.

The CPU 22a receives the coincidence signal s from the rotation angle signals 01 and 02, determines the reversal position of the spiral groove 13a, and calculates the groove reversal pitch p of the spiral groove A3. The pulses of the third pulse generator 21 between adjacent inversion positions are counted by the high-speed counter unit 22b, and the inversion angle (2α) is calculated.

Next, an example of a calculation procedure executed by the CPU 22a will be described with reference to FIG.

When the procedure shown in FIG. 10 is started, in step s1, the set value and the set value of the reversal angle 2α and the groove pitch p of the spiral groove A3 are inputted, and these allowable values are set. The value is also entered.

In the following step s2, the signal f of the direction discriminating unit 22f is acquired, and the process waits until the output signal d becomes CW. When it is determined that the signal f has become CW, the process proceeds to step s3.

In step s3, the process waits until the coincidence signal s from the comparator 30 is sent.When the coincidence signal s is obtained, in step s4, the rotation angle signal b of the third pulse generator 21 is received. The counter value of the high-speed counterunit 22b at each predetermined time is captured, and the peak value is detected by sequentially comparing the power counter value of the high-speed counterunit 22b before and after at predetermined time intervals. It is determined whether or not it has been performed, and its value is obtained.

In the procedure for determining the peak value, as shown in FIG. 12, the inflection point X of the rotation angle signal b of the third pulse generator 21 is determined. And this inflection point X. Is detected, the counter value of the high-speed counter unit 22b at that time becomes the peak value P. It is stored as

It should be noted that the rotation angle signal b shown in FIG. The high-speed counter measures the pulse signal sent from the device and shows this as a DZA-converted waveform.

In the following step s5, the process waits until the direction discrimination unit 22f becomes CCW, and when it is determined that CCW has come, the process proceeds to step s6. In the example shown in FIG. 12, as described above, the coincidence signal s is centered around 0, and the first and second rotating bodies 17 and 18 are arranged at equal intervals on both sides thereof. However, in the case of the present embodiment, the coincidence signal s at this time is generated at the inflection point, that is, after the third pulse generator 21 transmits this signal. If the rotation direction does not change from CW to CCW, or from CCW to CW, this is ignored.

In the case of the present embodiment, as shown in FIG. 11, when chattering C occurs in the direction discrimination signal f, the signal transmission time becomes a predetermined time, for example, 0.7 seconds. In the following cases, this is ignored and is not adopted as the direction discrimination signal f.

On the other hand, in step 6, the process waits until the next coincidence signal s is sent from the comparator 30. When the coincidence signal s is obtained, in step 7, the rotation angle signal b of the third pulse generator 21 is received. Then, the counter value of the high-speed counter unit 22b at each predetermined time is acquired, and the bottom value B is obtained by sequentially comparing the counter value of the high-speed counter unit 22b before and after. It is determined whether or not is detected, and its value is determined.

This bottom value B. In this judgment procedure, the inflection point of the rotation angle signal b of the third pulse generator 21 is detected. When this inflection point is detected, the counter of the high-speed counter unit 22b at that time is detected. Value is bottom value B. It is stored as

In the next step s8, the calculation of the reversal angle 2α is performed. This calculation is: counter value difference = peak value Ρ. One bottom value Β. It is. In step s8, the calculation of the groove pitch ρ is also performed.

The groove pitch ρ is the peak value Ρ. And the bottom value Β. During the calculation of the speed, the pulse number of the pulse generator 16 is calculated by the arithmetic circuit in the CPU (PLC, not shown) It is obtained by counting with.

When the reversal angle 2 ct and the groove pitch p are determined, those values are displayed together with the set value, and the set value-measured value is calculated, and it is determined whether or not this is within the allowable value in step s 1. If it is judged as 0 and the value is not within the allowable value, an alarm is generated in step 11.

If it is determined in step s10 that the measured value is within the allowable range, in step s12, the magnitudes of the previous measured values are compared, and if the current measured value is the maximum value or the minimum value, This is updated as the maximum value or the minimum value in step 13 and stored.

In step 14, the inversion angle data is added, and in step 15, the value is sent to the printer 41. In step s16, it is determined whether or not the measurement has been completed. If the measurement has not been completed, the process returns to step s2 again.

If it is determined in step s16 that the measurement has been completed, in step s17, the maximum value MAX, the minimum value MIN, and the average value AVE of the inversion angle 2α and the groove pitch p obtained by the measurement up to that point are calculated. Each calculation is performed and these values are output to the printers 40 and 41 (step s17), and the measurement is completed.

According to the groove pitch and groove inversion angle measuring unit 10 configured as described above, the inversion groove pitch p of the spacer A in which the spiral groove A 3 that inverts at a predetermined pitch and rotation angle is provided on the outer periphery. Both the measurement of the reversal angle 2α and the inversion angle 2α are made possible during the manufacturing process, and can be carried out over the entire length of the spacer.

In this case, the inversion pitch p and the inversion angle 2α of the spiral spacer A are determined based on the rotation angle and the rotation direction discrimination signal to determine the inversion position of the spiral groove A3, and the speed between the adjacent inversion positions. Since the pulse of the pulse generator 16 and the rotation angle signal are calculated by force, the reverse position is accurately measured even if there is a straight line between the reverse positions where the direction of the spiral groove A 3 changes. can do.

Now, the groove detection of the spiral spacer A for supporting the optical fiber configured as described above is performed. 查 According to the device 1, the groove abnormality detecting section 2 for detecting the groove abnormality of the spiral groove A3 slidingly contacting from the rotational resistance of the rotating body 3, and the rotation angles of the first and second rotating bodies 17 and 18a And a groove pitch and groove reversal angle measuring unit 10 for detecting the groove reversal pitch p and the groove reversal angle of the spiral groove A 3 based on the traveling speed of the optical fiber supporting spacer A and the traveling speed of the optical fiber carrying spacer A. The abnormality and the abnormality of the reversal pitch and the reversal angle can be simultaneously detected during the manufacturing process.

In the above embodiment, the case where the rotating bodies 3, 17, and 18 are provided in the groove abnormality detecting section 2 and the groove pitch and groove reversal angle measuring section 10, respectively, is exemplified. However, the present invention is not limited to this configuration. For example, the rotating body 3 may be shared with the first rotating body 17.

Further, in the above embodiment, the force exemplifying the case where both the inversion pitch P and the inversion angle 2a are measured by the groove pitch and groove inversion angle measuring unit 10 In the present invention, only the measurement of the inversion pitch p is performed. Can also.

Further, the arithmetic display 9c of the groove abnormality detecting unit 2 shown in the above embodiment can also be used with the arithmetic processing unit 22 of the groove pitch and groove inversion angle measuring unit 10. In this case, for example, the control procedure shown in FIG. 7 may be inserted before step s13 of the control procedure shown in FIG. 10 to form a series of procedures. Industrial applicability

The inspection apparatus of the spiral spacer for holding an optical fiber of the present invention is installed in the course of the manufacturing process of the spiral spacer, so that the irregularity of the groove shape and the groove over the entire length of the spiral spacer to be manufactured. Since the pitch and the reversal angle can be measured, it is effective in maintaining the transmission performance of an optical cable in which optical fibers are densely assembled.

Claims

The scope of the claims

1. In a spiral groove inspection apparatus of an optical fiber supporting spacer in which a rotating direction is reversed at a predetermined angular interval and a plurality of spiral grooves running continuously are provided on an outer periphery,

A groove abnormality detecting unit that includes a rotating body that rotates with the traveling of the optical fiber supporting spacer, and detects a groove abnormality of a spiral groove that slides from the rotational resistance of the rotating body;

A groove pitch and groove reversal angle measuring unit for detecting a groove pitch and a groove reversal angle of the spiral groove from a rotation angle of the rotating body and a traveling speed of the optical fiber supporting spacer. Inspection equipment for spiral spacers for carrying optical fibers.

2. The groove abnormality detection part has a guide rail that extends linearly,

A support member slidably provided on the guide rail,

The rotating body rotatably supported by the support member,

The optical fiber carrier according to claim 1, further comprising a load detector coupled via a magnetic attraction means that separates when a force equal to or more than a predetermined value is applied to the support member. Spiral souser groove inspection device.

3. The rotating body has a through-opening through which the spacer for supporting the optical fiber is passed, and a pin gauge having a tip fitted into the helical groove is provided protrudingly around the opening. 3. The groove inspection device for a spiral fiber spacer for holding an optical fiber according to claim 1, wherein:

4. The groove inspection device for a spiral spacer for holding an optical fiber according to claim 2, wherein the load detector is constituted by a load cell in a sealed state.

5. The groove pitch and groove inversion angle measuring unit includes: a speed pulse generator that generates a signal corresponding to an amount of advance of the spacer;

The rotating body fitted in the spiral groove,

A rotation angle signal corresponding to the rotation angle; a rotation direction determination signal delayed or advanced by a predetermined angle from the rotation angle signal; A pulse generator for transmitting an inversion pulse signal with the rotation of the rotating body;

In response to the rotation angle and rotation direction determination signal, the inversion position of the spiral groove is determined, and the pulse of the speed pulse generator and the rotation angle signal between adjacent inversion positions are force-pointed. 2. A groove inspection of a spiral sober for carrying an optical fiber according to claim 1, further comprising: a calculating device for calculating a groove pitch and a reversal angle of said spiral groove. apparatus.

6. The pulse generator is composed of a pair of first and second pulse generators and a third pulse generator arranged at predetermined intervals along the traveling direction of the spacer for holding the optical fiber. ,

A rotation direction discrimination unit that receives the rotation direction discrimination signal of the third pulse generator and discriminates the rotation direction of the optical fiber supporting spacer is provided, and the rotation angle signal of the first and second pulse generators is provided. The rotation angle of the third pulse generator is detected as the count start condition of the rotation angle signal when the values of the rotation angle signal coincide with each other, and the inflection point detected after a predetermined time has elapsed after the start of the count of the rotation angle signal. 7. The groove inspection apparatus for a spiral spacer for holding an optical fiber according to claim 6, wherein the inversion position is determined by the arithmetic unit.