US3260437A

US3260437A - Shoe for automatic nailing machine

Info

Publication number: US3260437A
Application number: US368098A
Authority: US
Inventors: Parr Edward Alden
Original assignee: Individual
Current assignee: Individual
Priority date: 1964-05-18
Filing date: 1964-05-18
Publication date: 1966-07-12
Anticipated expiration: 1983-07-12

Description

July 12, 1966 E. A. PARR 3,260,437

SHOE FOR AUTOMATIC NAILING MACHINE Filed May 18, 1964 F1a. 7 FIG. 2. Fre. s.

INVENTOR EDWARD ALnEN PARR a, 5M A2M ATTORNEY United States Patent O 3,260,437 SHOE FOR AUTOMATIC NAILING MACHINE Edward Alden larr, Palo Alto, Calif., assignor of onehalf to Cavell X. Boyle, Palo Alto, Calif., and one-half to Donald G. Williams, San Mateo, Calif.

Filed May 18, 1964, Ser. No. 368,098 4 Claims. (Cl. 227-149) This invention relates to automatic nailing machines and deals particularly with an improved shoe adapted to replace the shoe as shown and described in my Patent No. 3,041,617, issued to me on the 3rd day of July 1962.

The invention to be described and claimed hereinafter is an improvement on the invention disclosed in said patent and the shoe described herein has been designed to Work in conjunction with the machine shown in the above mentioned patent and the illustration and description herein will be directed exclusively to that part of the machine which has been established in the said patent as the shoe.

The primary object of the invention to be described and claimed hereinafter is vto provide a shoe of the character described which will work with the mechanisms described in the said patent to perform all the necessary functions of a shoe in a precise manner. One which will react quickly :and accurately to the movement of the machine over a iioor.

Another object is to produce a shoe that will not drop nails at unwanted places.

A further object is to provide a shoe that will not clog the nails in the nail feeding route.

Still another object is to provide a shoe wherein the nail feeding mechanism is posi-tive in action and under strict control of the operator at all times.

Briefly stated, the invention `amoun-ts to providing a shoe adapted to replace the shoe on the nailing machine shown in the above mentioned patent in any suitable manner, such as by making it integral with the machine or detachably mounting 'the shoe on the lower end of the main barrel shown in the patent, wherein the new shoe comprises a body portion adapted to form a xed extension of the main barrel of the striking mechanism and carries within itself a member pivoted at its lower end that swings in a vertical slot in the wall of the extension. The slot extends through the wall of the extension into the inner bore of the extension which carries the striker operated by `the striking mechanism shown in the patent and the pivoted member freely slides in the slot. When the machine is lifted from -the floor the sliding member is held in a closed position, that is, a position where the nail is held in the inner bore of the shoe. This would occur when the whole machine is raised from the floor and is being moved from place to place. As soon as the machine is set down in a new nailing position, :a cam shaped toe on the lower end of the pivoted member engages the floor and swings the member outwardly in the slot and :the nail drops to the bottom of the bore where the striker drives it home. During these operations, the nail feeding mechanism has dropped :a single nail into the nail chute from where it drops into a tapered opening at the top of the slot where it is suspended by its head. After the nail is driven and the machine is picked up to be moved to a new spot for driving a nail, the pivoted member swings back into a closed position and in so doing pushes the suspended nail ahead of itself in the slot unil it reaches the inner bore of the shoe where it holds the nail in this position as before stated. At this point the cycle has been completed land is ready to be repeated. The operation is continuous and is brought about by raising and lowering the machine from the floor.

Other objects and advantages will become apparent as the description proceeds in conjunction with the drawing in which:

ice

FIG. l is a side elevation of the complete m-achine showing how applicants invention would appear when used in conjunction with the mechanisms of the patent mentioned;

FIG. 2 is an enlarged fragmentary View of FIG. 1 taken in lthe direction of the arrow 2;

FIG. 3 is a side view of FIG. 2 taken in the direction of the arrow 3;

FIG. 4 is a vertical section taken on the line 4 4 of FIG. 2;

FIG. 5 is the same view :as FIG. 4 with the pivoted member shown in its outward or open position;

FIG. 6 is a cross section taken on line 6 6 of FIG. 4;

FIG. 7 is a cross section taken on line 7 7 of FIG. 4; and

FIG. 8 is a cross section taken on line 8 8 of FIG. 5.

In describing the presen-t invention, reference will be made to the original invention covered 'by the herein mentioned patent in general terms only so far as is necessary to establish the mechanism involved to show the use and construction of the present invention as it relates to the original patent.

In FIG. l the original machine is shown as it was illustrated in he former patent with the original shoe replaced by applioants present shoe. I-t will be seen that the complete machine comprises, generally speaking, a main barrel, or the body of the machine, designated 11; a reciprocable striking member, designated 12; a nail hopper generally designated 13a; Aa nail feeding mechanism designated 13; and a shoe generally designated 14. Applicants invention resides in the shoe 14 as will ybe explained hereinafter, the rest of the recited mechanisms operate in the same manner as explained in the said patent.

Referring to the drawing, it Will be seen in FIGS. 2 to 8 that applioants new shoe comprises a barrel generally designated 15. This barrel as before stated, may be made integral with Ithe main barrel 11 of the original structure shown in FIG. 1 or it may be made to be detachably mounted on the lower end of the barrel 11. The barrel 15 is formed with a slot 16 which runs vertically up one side of the barrel and terminates in a hole 17 which is larger diametrically than the width of the slot and is formed by drilling a hole straight in to the bore 25 of the barrel and then slanting the drill upwardly and forming a downward slope of the hole toward the center of the barrel, see FIG. 4. The hole is of sufficient diameter to slidably pass -the heads of nails and the width of the slot should be sufficient to slidably pass the shanks of the nails.

Slidably mounted in the slot 16 is a member 18 which is pivoted at its lower end as Vshown at 19. To provide the necessary strength and furnish an extended slot 16, I have provided

wings

20 and 21 which are welded to the body 15 and aligned with the slot on each edge. The purpose of these is to extend the slot so that the pivoted member 18 will have sufficient support when in its outwardly extended position Vand also as shown, to furnish the pivot point 19.

The member 118 is pivotally mounted to freely slide in the slot 16 and between the

wings

20 and 21 and has a cam shaped .toe 22 which extends below the body 15 when the member is in a closed position, as shown in FIG. 4. This position occurs when the nailing machine is raised Ifrom the floor for movement to a new position for nailing .and the sliding member 18 is pulled into a closed position by a coiled spring 26 which extends around the body of the barrel 15 and has its ends connected to a short piece of iiat metal strip 27 fastened to the outer edge of the member 18. For purposes of handling the machine on a iloor and avoiding obtrusions that might catch an operators clothing, the metal strip Patented July 12, 1966 3 is set into a recess 29 so that it will be flush lwith the edge of the wings and 21 when the sliding member 1S is in a closed position. The wings `2) and 21 likewise have similar recesses 30 on their outer edges. The lower end of the barrel 15 is chamfered as indicated at 32 to permit driving toe nails and using in corners.

Before ygoing into a description of the operation of the machine, it should be understood that the striking member l112 is presumed to be pouver driven, either by electricity or pneumatic pressure and that the machine is lifted from the floor by raising the striking member to the limit of its upward stroke where it engages a stop and lifts the machine from the oor, all of which is explained in the before mentioned patent. This position is shown in FIG. 4. Here it will be noted that the striking member 12 is in the upper part of the bore 25 of the barrel 15 and that the sliding member -18 is in a closed position. In this position several things should be observed. IFirst, that the cam shaped toe 22 has rotated -into a position below the end of the shoe. Second, that the sliding member 18 is in a closed position and has .a nail N clamped in the bore 25 where it can not fall out during movement of the machine. Third, that when the machine is set down in a new nailing position the sliding member 18 is swung outwardly on its pivot 19 and assumes the position shown in FIG. 5. This releases the nail N and it falls to the bottom of the bore 25 ready tfor the striking member :12. As the striking member 12 is lowered in the bore the nail feeding mechanism generally designated 13 drops a single nail into the nail chute 53 and it passes through the `chute and falls between the

wings

20 and 21. It will be noted that the upper ends of the wings are bent outwardly from each other and form a Wedge shaped entrance to the space between the wings into which the chute enters, best shown in FIG. 2. As the nail falls into the wedge shaped entrance, the head of the nail engages the sides of the entrance and the nail is loosely supported in a position as shown in FIG. 2 and FIG. 5. The striker drives the nail home in the bore 25 and is withdrawn to raise the machine and move it to a new position. During this latter operation, the sliding member 18 is pulled back into a closed position by the spring 26 and as it passes through the slot 16, it catches the nail on its point 33 and pushes it ahead of itself through the slot 16. The head of the nail passes through the hole 17 land the nail enters the bore 25 and slides down until it is held in position by the point 32 on .the member 18, see FIG. 4. In this position, the cycle is ready to repeat.

Although I have shown and described my invention in conjunction -with my former patent hereinbefore mentioned, nevertheless, it should be apparent that the shoe involved in the present invention is capable of 'working in conjunction Awith any automatic nail driving machine that has a nail feeding mechanism equivalent to the one shown in my former patent.

I claim:

1. A shoe for an automatic nailing machine of the character described comprising an elongated body adapted to be operably connected to said machine, said body having a longitudinal bore therethrough and a slot on one side paralleling and extending into said bore, said slot extending from the lower end of said body and terminating short of the upper end thereof in a hole of greater diameter than the width of said slot, a member pivoted at the lower end slidably mounted in said slot adapted to swing into and out of the bore in said body, said member having a cam shaped toe on the lower end thereof arranged to extend below the lower end of said body to engage the surface of a floor and rotate said sliding member out of said slot to an open position when said body contacts said floor, and a spring member arranged -to swing said sliding member into said slot to a closed position when said body is lifted from the Hoor.

2. A device as set forth in claim 1 which also includes means yfor extending said slot outwardly with respect to said body with a wedge shaped opening to the outward extension of said slot above the said hole terminating the slot in the body.

3. A shoe yfor an automatic nailing machine of the character described comprising an elongated body having a bore longitudinally therethrough, there being a slot on one side of said body paralleling and extending into said bore, said slot terminating short of the upper end of said shoe in a hole of greater diameter than the width of said slot, a plate fixed to the outer surface of said body on each side of said slot `and in alignment therewith forming an outward extension of said slot with respect to said body, said plates being bent at their upper ends to form a wedge shaped entrance to said slot, a sliding member in said slot pivotally mounted at the lower end thereof adapted to swing into and out of the bore in said body, a cam shaped toe on the lower end of said sliding member adapted to engage a floor and rotate said sliding member on its pivot out of said bore and into an open position, and a spring member arranged to swing sad sliding member back into a closed position when said body is raised from the floor.

4. In combination with an automatic nailing machine having an automatic nail feeding mechanism which includes a nail hopper, a nail chute, and means operable by raising said machine with respect to a floor to feed a single nail from said hopper to said chute, a shoe adapted to be operably embodied in said machine, said shoe comprising an elongated body having a longitudinal bore therethrough, there being a slot on one side of said body paralleling and extending into said bore, said slot terminating short of the upper end of said body in a hole of greater diameter than the width of said slot, a plate fixed to the outer surface of said body on each side of said slot and in alignment therewith lforming an outward extension of said slot with respect to said body, said plates being -away from each other at their upper ends to form a wedge shaped entrance to the slot between them positioned to receive n-ails from said chute, a sliding member in said slot pivotally mounted at the Ilower end thereof adapted to swing into and out of the bore in said body, a cam shaped toe on the lower end of said sliding member adapted to engage the `floor and rotate said sliding member on its pivot out of said bore and into an open position, and a spring member arranged to swing said sliding member back into a closed position when said body is raised from Ithe floor .and push a nail dropped from the chute of said automatic: nailing machine into said wedge shaped entrance lwhere it is supported by the head thereof into the ybore of said body and hold the nail in a fixed position.

No references cited.

GRANVILLE Y. CUSTER, IR., Primary Examiner.

Claims

1. A SHOE FOR AN AUTOMATIC NAILING MACHINE OF THE CHARACTER DESCRIBED COMPRISING AN ELONGATED BODY ADAPTED TO BE OPERABLY CONNECTED TO SAID MACHINE, SAID BODY HAVING A LONGITUDINAL BORE THERETHROUGH AND A SLOT ON ONE SIDE PARALLELING AND EXTENDING INTO SAID BORE, SAID SLOT EXTENDING FROM THE LOWER END OF SAID BODY AND TERMINATING SHORT OF THE UPPER END THEREOF IN A HOLE OF GREATER DIAMETER THAN THE WIDTH OF SAID SLOT, A MEMBER PIVOTED AT THE LOWER END SLIDABLY MOUNTED IN SAID SLOT ADAPTED TO SWING INTO AND OUT OF THE BORE IN SAID BODY, SAID MEMBER HAVING A CAM SHAPED TOE ON THE LOWER END THEREOF ARRANGED TO EXTEND BELOW THE LOWER END OF SAID BODY TO ENGAGE THE SURFACE OF A FLOOR AND ROTATE SAID SLIDING MEMBER OUT OF SAID SLOT TO AN OPEN POSITION WHEN SAID BODY CONTACTS SAID FLOOR, AND A SPRING MEMBER ARRANGED TO SWING SAID SLIDING MEMBER INTO SAID SLOT TO A CLOSED POSITION WHEN SAID BODY IS LIFTED FROM THE FLOOR.