WO1997016614A1

WO1997016614A1 - Security system for cargo loading doors

Info

Publication number: WO1997016614A1
Application number: PCT/US1996/017180
Authority: WO
Inventors: William P. Lanigan; Peter W. Mirabella; Gerald F. Chalko
Original assignee: Mijack Products, Inc.
Priority date: 1995-10-30
Filing date: 1996-10-24
Publication date: 1997-05-09
Also published as: AU7597996A

Abstract

A linkage mechanism (68) includes an elongated distal section (88) and an L-shaped proximal section (90), the distal section (88) is coupled to the latching device (66) and a short leg (92) of the L-shaped proximal section (90) is couplable with the electromechanical actuator (56). This structure provides the advantages of converting minimal linear motion to angular motion required to move the latching device (66) from the locked to the unlocked position and vice versa. Advantageously, it also simulates a rigid link thus holding the latch (66) in its locked position and diverting any forces from the electromechanical actuator (56) to the housing (64), for improved strength and integrity. Additionally, in this position the system (50) is self locking and requires essentially no battery power, thus minimizing battery drain.

Description

SECURITY SYSTEM FOR CARGO LOADING DOORS

Field of the Invention

This invention relates to security systems, and particularly to retrofitable and factory installable security systems with pin structure for cargo loading doors and enclosures.

Background of the Invention Fig. 1 shows the back of a conventional semi-trailer or cargo container 10 or other similar enclosed body, preferably in the form of an International Standards Organization (ISO) container, domestic container or semi-trailer, having a pair of doors 12 and 14, hinged along their outer edges at 16 and 18 to opposite vertical sides 20 and 22 of door frame or opening 24. Thus, doors 12 and 14 are mounted for relative rotation in opposite directions around sides 20 and 22 between a closed position as shown in Fig. 1 , and an open position. When either or both doors 12 and 14 are open, ready access is provided through door opening 24 to load or unload cargo into or out of the trailer or container 10.

When doors 12 and 14 are closed, an overlapping tab ( door retainer ) which can be intemal or external to the doors, can be used. In use, door 12 is closed first and thereafter door 14 is closed to overlap and hold door 12 closed. Typically, an overlapping tab ( door retainer ) which is external to the doors can be used to overlap door 12. Subsequently, door 14 is typically opened first before door 12 can be rotated to the open position. Carried by each door is a conventional closure assembly of any number of axially rotatable rods 30, suitably journaled in upper and lower brackets 32 and 34 on the door and provided with a handle 36. The upper and lower ends of the rod 30 engage with cam members 38 and 40 and bring the door to a fully closed position as the handle 36 and attached rod 30 are manually rotated to the position in Fig. 1. When in this position, a padlock or the like can be used to keep handle 36 and attached rod 30 in the closed position, as shown.

Accordingly, the manually operable closure means ( rod 30, brackets 32 and 34, handles 36 and cam members 38 and 40 ) are located on the exterior of the container 10 where they are readily accessible by authorized and unauthorized workers and drivers, as well as would be thieves intent on stealing products and goods which may be contained in the semi-trailers and similar bodies and like enclosures. Previously, the security for these trailers, ISO containers, domestic containers and the like has been quite poor, usually consisting of a padlock and/or seal having an exposed link which can be cut by bolt cutters or equivalent tools. Thus, semi¬ trailers, containers and trucks left unattended for any length of time, as over night in truck terminals, intermodal terminals and freight yards, on shipping docks and piggy-back railroad cars, or at industrial or commercial loading areas ( and during transit ), are vulnerable to thievery and pilferage.

The problem of vulnerability of externally located closure means is minimized by the present invention, through the employment of a retrofitable or factory installed security system adapted to be located within a container, where it is not accessible to a would be thief or opportunist.

There is an ever demanding requirement for improved security systems for cargo loading doors and enclosures for the worldwide transportation industry.

Brief Description of the Drawings

Fig. 1 is a rear view of an ISO container or other similar enclosed body, showing in dashed line a typical placement of part of a security system for cargo loading doors, in accordance with the present invention;

Fig. 2 is an inside view of part of the security system, without a cover ( to show the placement of some of the various components ) and a remote transmitter, in accordance with the present invention; Fig. 3 is an inside view of part of the security system, with a cover which protects many of the components, in accordance with the present invention;

Fig. 4 is a side view taken along the lines 4-4 in Fig. 2 without a cover, of a portion of the security system, in accordance with the present invention;

Fig. 5 is a cut away view taken along the lines 5-5 in Fig. 2, of a portion of the security system showing the latchinq device in a relaxed position ( or a portion of a lock assembly in an unlocked position ), in accordance with the present invention;

Fig. 6 is a cut away view taken along the lines 5-5 in Fig. 2, of a portion of the security system showing the latching device in a raised position ( or a portion of the lock assembly in a locked position ), in accordance with the present invention; Fig. 7 is a side view taken along the lines 4-4 in Fig. 2 with a solenoid cover and latch guard for a portion of the security system, in accordance with the present invention;

Fig. 8 is a top view of a portion of the security system in Figs. 1-7, in accordance with the present invention; Fig. 9 is a top view of a portion of the security system in Figs.

1 -7 with an optional external antenna, in accordance with the present invention;

Fig. 10 is an inside view of part of an alternate embodiment of the security system, without a cover ( to show the placement of some of the various components ), in accordance with the present invention;

Fig. 11 is an inside view of part of the security system in Fig.

10, with a cover which protects many of the components, in accordance with the present invention; Fig. 12 is a side view taken along the lines 12-12 in Fig. 10 without a cover, of a portion of the security system of Fig. 10, in accordance with the present invention;

Fig. 13 is a cut away view taken along the lines 13-13 in Fig.

1 1 , of a portion of the security system of Fig. 10, showing the pin structure in a raised position ( or a portion of the lock assembly in a locked position ), in accordance with the present invention; Figs. 14 and 15 show top views of a portion of the security system in Figs. 10, without and with a cover, respectively, in accordance with the present invention; and

Fig. 16 is a partial inside view of a selected portion of the security system in Fig. 10, without a cover ( to show the placement of some of the various components ), in accordance with the present invention.

Detailed Description of the Preferred Embodiment

Referring to the figures, a retrofitable or factory installable security system 50 is shown. The security system 50 is particularly adapted for cargo loading doors for cargo containers, ISO containers, domestic containers, truck trailers and the like ( hereafter referred to as "containers "). Placement of system 50 may vary from the position ( top right ) shown in Fig. 1 and the other figures, the placement shown in the figures being a preferred placement to minimize the possibility of breakage during loading and unloading of cargo.

The security system 50 in its simplest form, comprises:^' a remote transmitter 52 for transmitting a radio signal; a receiver 54 for receiving the radio signal from the remote transmitter 52; an electro-mechanical actuator 56 coupled to the receiver 54 for moving a latching device 66 between a locked position 60 and an unlocked position 62; and a lock assembly 58 including a housing 64 for holding the electro-mechanical actuator 56, a latching device 66 pivotably connected to the housing 64, and a linkage mechanism 68 coupling the electro-mechanical actuator 56 and the latching device 66 for moving the latching device 66 to and from a raised position 70 to a relaxed position 72, whereby the latching device 66 is movable between the locked position 60, as shown in Fig. 6, and unlocked position 62, in Fig. 5, respectively.

In one embodiment, the remote transmitter and receiver can each be transceivers, for an improved intelligent communication system. The system can provide, but is not limited to, for storage, identification, memory and interrogation of the system 50. For example, this feature could provide a history of all door openings, closings and tamperings of the system 50.

This system is configured to be tamper resistant because of it's placement which is preferably internal to a container. In addition, system 50 has been designed in a preferred embodiment to have a low profile to minimize intrusion into the valuable cargo space of the container. In one embodiment, only one latching mechanism is necessary to lock two doors when utilized with a door retainer or the like, providing simplicity of design. As should be understood, other embodiments can include a plurality of latching mechanisms.

In a preferred embodiment, the housing 64 is adapted to be connected to an inside of a cargo loading door, such as positioned at the top right corner, as shown in dashed line as item 50 in Fig. 1.

This remote placement is out of the way so as not to interfere with the loading and unloading operation. Thus, this strategic position provides a substantially tamper proof security system, preferably with internal placement of system 50, so as to be visually hidden from an opportunist or thief.

Also in a preferred embodiment, the latching device 66 is particularly adapted to latch to a header 74 of an ISO container 10 when the latching device 66 is in the locked position 60 and unlatched from the header 74 when the latching device 66 is moved to the unlocked position 62, as shown in Figs. 5 and 6. By utilizing a header of a container to lock the doors, a retrofittable or factory installable system 50 is easily installed, thus minimizing the need for cutting, drilling or welding during installation.

In one embodiment as shown in Fig. 4, the housing 64 can include primary connecting devices 76, or fastening means such as bolts and nuts extending through the door and attach a portion of the system 50 to the inside door 14. Also, secondary connecting devices or supplemental fastening means such as set screws or bolts applying outward axial pressure can be used, to define a secondary securement mechanism between the housing 64 and the cargo loading door 14. The primary connecting devices 76 provide accuracy and consistency in placement, location and alignment of a portion of the system 50. Further, the secondary connecting devices 78, in the event of removal of the primary devices 76 ( during a break in ), continue to secure and maintain the system 50 at the desired position.

As best shown in Fig. 9, the housing 64 can further include a back plate 80 with a plurality of outwardly extending anchor members 82, which are adapted to be coupled with a plurality of hinge members 84 of the latching device 66, via a pivot pin 86. Advantageously, this structure allows the lock assembly 58 to easily move from the locked position 60 to the unlocked position 62. This structure also allows for variations in door and frame geometries.

As illustrated in Figs. 5 and 6, the linkage mechanism 68 includes an elongated distal section 88 and an L-shaped proximal section 90, the distal section 88 is coupled to the latching device 66 and a short leg 92 of the L-shaped proximal section 90 is couplable with the electro-mechanical actuator 56. This structure provides the advantages of converting minimal linear motion to angular motion required to move the latching device 66 from the locked to the unlocked position and vice versa. Advantageously, it also simulates a rigid link thus holding the latch 66 in its locked position and diverting any forces from the electro-mechanical actuator 56 to the housing 64, for improved strength and integrity. Additionally, in this position the system 50 is self locking and requires essentially no battery power, thus minimizing battery drain.

In one embodiment, the elongated distal section 88 includes a stop tab 94. The stop tab 94 properly aligns the linkage mechanism 68 beyond center with respect to the proximal section 90 to simulate a rigid link securing the latching device 66 in its locked position 60, in Fig. 6.

The L-shaped proximal section 90 and the elongated distal section 88 are couplable with a pivot pin 96. The pivot pin 96 allows rotation and transfer of motion through the distal section 88 to the latching device 66. As shown in the figures, the L-shaped proximal section 90 is pivotably connected to the anchor members 82 of the housing via a stationary pivot pin 98. The pivot pin 98 is significant in the conversion of linea^r to angular motion, and maintaining a simulated rigid link. It is connected to a middle portion of the anchor members 82 of the housing 64. This allows a minimal amount of displacement from the electro-mechanical actuator 56 to move and rotate the latching device 66.

As best shown in Figs. 5 and 6, the electro-mechanical actuator 56 can include one or more sensors 100 for sensing whether the lock assembly 58 is in the locked or unlocked position 60 or 62. In the event that the latching device 66 is not in a position after a given command, from the remote transmitter 52, the sensor(s) 100 can provide a signal that will allow re-execution automatically after a predetermined time, for example. In addition, this structure can provide feedback in order to give positioning data as to internal location of the latching device 66.

In one embodiment, the security system 50 includes an electronic control 102 or interface structure, coupled to the receiver 54 and the electro-mechanical actuator 56. This structure interprets the transmitted information to suitably execute an open or close command, for example. Advantageously, this structure can receive information from the remote transmitter 52 without the necessity of an external power source other than the batteries or power supplies 108 shown in the figures. Also, this structure 102, like most of the other components of the security system 50, has a narrow width or profile so as to minimally intrude into the valuable cargo space.

As shown in Fig. 2, the security system 50 includes an electronic control or interface structure 102 coupled to the receiver

54 and the electro-mechanical actuator 56, capacitor(s) 104, an antenna 106 and power supplies 108. The capacitors 104 suitably build-up and store energy to rapidly release an electrical charge, to actuate the electro mechanical actuator 56, to appropriately move a plunger 1 10. This provides an efficient use of the energy supplied by the power supply 108, preferably in the form of batteries. The antenna can vary widely depending on the application, and can be of a conventional type or patch type, for example. In a preferred embodiment, the antenna is placed intemal to a container to keep it hidden and minimize the possibility of damage, and is operably coupled to the system 50, for suitable reception of a signal. In another embodiment, the antenna could be external, if desired.

In a preferred embodiment, a sensor, such as but not limited to, a proximity sensor 114 can be utilized to allow the latch to be actuated only when a door 14 is in proximity to a metallic material, such as a header 74. Thus, this feature can help to minimize damage to the latching device 66, when closing the door with the latching device 66 in a locked position. The sensor 1 14 is suitably connected to the other components of the security system 50, for example 54, 56, and 64 and is preferably physically connected to and in proximity of the latch 66, for accurate sensing.

In Fig. 4, the electro-mechanical actuator 56 includes a plunger 110, a snap ring 111 and a spring 112. The spring provides an outward force to bias the plunger 110 to an extended position when the plunger 110 is released. A second spring 116 is shown in Fig. 4, and can be used to help push (bias) the latch 66 to the locked position if desired. The spring can help to contribute to minimizing current drain and facilitating movement to the locked position. It is strategically and physically located between the latching device 66 and anchor member 82 of the housing 64 so as not to require more space, thus providing minimal space requirements for the system 50.

As best shown in Fig. 7, the housing 64 can include a solenoid cover 118 and latch guard120 for protecting the latching device (and linkage) from load shifts. In use, the electro-mechanical actuator 56 is in a form of a solenoid, and can be suitably actuated, to convert electrical energy to magnetic energy, which in turn can be converted to a mechanical energy. Thus, this structure can generate a pulling action to provide the locked position 60 in Fig. 6. Continuing, the plunger 110 continues until it bottoms out internally against a permanent magnet within the actuator 56, thus, positioning the linkage to provide a simulated rigid link. Subsequently, when the actuator 56 is next actuated via the remote transmitter 52, the solenoid by use of the windings, releases the plunger 110 to allow it to move away from the magnet ( to move to an extended, solenoid plunger 110 position) extending outwardly, defining an unlocked position as shown in Fig. 5.

As shown in Figs. 5 and 6, the latching device includes an L- shaped latch 122 with a predetermined angle adapted to be coupled with a complementarily configured block 123 connected to a header 74 of a container, to provide a self-engaging connection.

In one embodiment, a port 124 is included in the door 12, to provide access to a electronic key 126 having an external probe means 128, for connection to system 50, to provide one or more of: external power to the system 50; a battery charger; open and close signals to the system 50; interrogate the system 50 and the like.

Referring to Figs. 10 through 16, an alternate retrofitable or factory installable security system 150 is shown. The security system 150 is particularly adapted for cargo loading doors for domestic containers and trailers and the like . Placement of system 150 may vary from the position ( top right ) shown in Fig. 1 and the other figures, the placement shown in the figures being a preferred placement to minimize the possibility of breakage during loading and unloading of cargo.

The security system 150 in its simplest form, comprises: a remote transmitter 152 for transmitting a radio signal; a receiver

154 for receiving the radio signal from the remote transmitter 152; an electro-mechanical actuator 156 coupled to the receiver 154 for moving a pin device 166 between a locked position 160 and an unlocked position 162; and a lock assembly 158 for holding the electro-mechanical actuator 156, a pin device 166 and a linkage mechanism 168 coupling the electro-mechanical actuator 156 and the pin device 166 for moving the pin device 166 to and from a locked position 160 to an unlocked position 162.

In one embodiment, the remote transmitter 152 and receiver 154 can each be transceivers, for an improved intelligent communication system. The system 150 can provide for storage, identification, memory and interrogation of the system 150, for example. This feature could provide a history of all door openings, closings and tamperings of the system 150.

This system is configured to be tamper resistant because of it's placement which is preferably intemal to a container. In addition, system 150 has been designed in a preferred embodiment to have a low profile to minimize intrusion into the valuable cargo space of the container. In one embodiment, only one pin device 166 is necessary to lock two doors when utilized with a door retainer or the like, providing simplicity of design. As should be understood, other embodiments can include a plurality of pin devices.

In a preferred embodiment, the lock assembly 158 is adapted to being connected to an inside of a cargo loading door, such as positioned at the top right corner, as shown in dashed line as item 50 in Fig. 1. This remote placement is out of the way so as not to interfere with the loading and unloading operation. Thus, this strategic position provides a substantially tamper proof security system, preferably with intemal placement of system 150, so as to be visually hidden from an opportunist or thief. Also in a preferred embodiment, the pin device 166 is particularly adapted to lock and interconnect to a header 174 of a container 10 when the pin device 166 is in the locked position 160 and unlocked 162 from the header 174 when the pin device 166 is retracted, as shown as item 162 in Fig. 16. By utilizing a header of a container to lock the doors, a retrofittable or factory installable system 150 can be installed, thus minimizing the need for cutting, drilling or welding during installation.

The lock assembly is shown with primary connecting devices 176, or fastening means such as bolts and nuts extending through the door and attach a portion of the system 150 to the inside door

14.

As best shown in Fig. 13, the lock assembly 158 has a back platel 80 adapted to fit and connect to a back, inside door of a container, for ease of installation and adjustment, if necessary. This structure can help in allowing for variations in door and frame geometries. As illustrated in Figs. 10 and 16, the linkage mechanism 168 includes a distal section 188 and a proximal section 190, the distal section 188 is coupled to the pin device 166 and the proximal section 190 is couplable with the electro-mechanical actuator 156, via a fourth pivot pin 188. This structure provides the advantages of converting minimal linear motion to angular motion required to magnify the linear movement of the pin device 166 from the locked 160 to the unlocked position 162 and vice versa. Advantageously, it also simulates a ngiα link thus holding the pin device 166 in its locked position, for improved strength and integrity. Additionally, in the locked position 160, the system 150 is self locking and requires essentially no battery power, thus minimizing battery drain.

In one embodiment, the distal section 188 includes a stop tab 194. The stop tab 194 properly aligns the linkage mechanism 168 beyond center with respect to the proximal section 190 to simulate a rigid link securing the pin device 166 in it's locked position 160, in Figs. 10 and 16.

The proximal and distal sections 190 and 188 are couplable with a middle pivot pin 184. The top pivot pin 182 allows rotation and transfer of motion through the distal section 188 to the pin device 166.

As shown in Figs. 10 and 16, a bottom stationary pivot pin 186 pivotably connects the proximal section 190 to the lock assembly 158 back plate 180. The bottom stationary pivot pin 186 is significant in the conversion of linear to angular motion, and contributing to maintaining a simulated rigid link. This structure allows a minimal amount of displacement from the electro¬ mechanical actuator 156 to move and rotate the linkage mechanism 168, which in turn moves the pin device 166 to and from the locked and unlocked positions. During an attempted break-in (prying, striking, etc. ), the linkage mechanism 168 is configured to maintain its integrity, by for example, transfering forces away from the solenoid 156. As shown in Fig. 16, the back plate 180 can include one or more sensors 200 for sensing whether the pin device 166, is in the locked or unlocked position 160 or 162. In the event that the pin device 166 is not in an unlocked position after a given command from the remote transmitter 152, the sensor(s) 200 can provide a signal that will allow re-execution automatically after a predetermined time, for example. In addition, this structure can provide feedback in order to give positioning data as to intemal location of the pin device 166.

In one embodiment, the security system 150 includes an electronic control 202 or interface structure, coupled to the receiver 154 and the electro-mechanical actuator 156. This structure interprets the transmitted information to suitably execute an open or close command, for example. Advantageously, this structure can receive information from the remote transmitter 152 without the necessity of an external power source other than the batteries or power supplies 208 shown in the figures. Also, this structure 202, like most of the other components of the security system 150, has a narrow width or profile so as to minimally intrude into the valuable cargo space of a container.

As shown in Fig. 10, the security system 150 further includes an electronic control or interface structure 202 coupled to the receiver 154 and the electro-mechanical actuator 156, capacitor(s) 204, an antenna 206 and a power supply 208. The capacitors 204 suitably build-up and store energy to rapidly release an electrical charge, to actuate the electro-mechanical actuator 156, to appropriately move a plunger 210. This provides an efficient use of the energy supplied by the power supply 208, preferably in the form of batteries. The antenna can vary widely depending on the application, and can be of a conventional or patch type, for example. In a preferred embodiment, the antenna is placed internal to a container to keep it hidden and minimize the possibility of damage, and is appropriately coupled to the system 150, for reception of a signal. In another embodiment, the antenna could be external, if desired.

In a preferred embodiment, a sensor, such as but not limited to, a proximity sensor 214 can be utilized to allow the pin device 166 to be actuated only when a door 14 is in proximity to a metallic material, such as a header 174. Thus, this feature can help to minimize damage to the pin device 166, when closing the door with the pin device 166 in a locked or extended position 162. The sensor 214 is suitably connected to the other components of the security system 150, for example 154 and156 and is preferably physically connected to and in proximity of the pin device 166, for accurate sensing.

In Fig. 16, the electro-mechanical actuator 156 includes a plunger 210, a snap ring 21 1 and a spring 212. The spring 212 provides an outward force to bias the plunger 210 to an extended position when the plunger 210 is released.

As best shown in Fig. 11 , the lock assembly 158 can include a solenoid cover 218 and electronics cover 220 for protecting the system 150 components and linkage mechanism 168 from load shifts.

In use, the electro-mechanical actuator 156 is in a form of a solenoid, and can be suitably actuated, to convert electrical energy to magnetic energy, which in turn is convertable to a mechanical energy. Thus, this structure can generate a pulling action to provide the locked position 160 in Fig. 10. Continuing, the plunger 210 continues until it bottoms out internally against a permanent magnet within the actuator 156, thus, positioning the linkage to provide a simulated rigid link. Subsequently, when the actuator 156 is next actuated via the remote transmitter 152, the solenoid by use of the windings, releases the plunger 210 to allow it to move away from the magnet ( to move to an extended, solenoid plunger 210 position) extending outwardly, defining an unlocked position as shown in Fig. 10 (right side).

As shown in Fig. 13, the pin device 166 can preferrably be in the form of a dead bolt at a predetermined angle with respect to a vertical axis, and is adapted to be coupled with a complementarily configured recepticle 224 of the header 174 of a container, to provide a self-engaging connection. In one embodiment, a port 224 is included in the door 12, to provide access to a electronic key 226 having an external probe means 228, for connection to system 150, to provide one or more of: external power to the system 150; a battery charger; open and close signals to the system 150; interrogate the system 150 and the like.

Thus, in one embodiment, a security system 150 for cargo loading doors is disclosed. The system can include: at least one of a remote transmitter 152 and electronic key 226 for transmitting a signal; a receiver 154 for receiving the signal from at least one of the remote transmitter 152 and the electronic key 226; an electro¬ mechanical actuator 156 coupled to the receiver 154 for moving a pin structure 166 between a locked position 160 and an unlocked position 162; and a lock assembly 158 adapted to hold the electro¬ mechanical actuator 156, and a linkage mechanism 168 coupling the electro-mechanical actuator 156 and the pin structure 166, for moving the pin structure 166 to and from the locked position to the unlocked position. Although various embodiments of the invention have been shown and described, it should be understood that various modifications and substitutions, as well as rearrangements and combinations of the preceding embodiments, can be made by those skilled in the art.

Claims

1. A security system for cargo loading doors, comprising: a remote transmitter for transmitting a signal; a receiver for receiving the signal from the remote transmitter; an electro-mechanical actuator coupled to the receiver for moving a pin structure between a locked position and an unlocked position; and a lock assembly adapted to receive the electro-mechanical actuator, the pin structure and the electro-mechanical actuator are couplable by a linkage mechanism for moving the pin structure to and from the locked position to the unlocked position.

2. The security system of claim 2, wherein the pin structure is adapted to be at least partially received in a header of an ISO container, domestic container or semi-trailer, when the pin structure is in the locked position and withdrawn from the header when the pin structure is in the unlocked position.

3. The security system of claim 1 , wherein the linkage mechanism includes a distal section and a proximal section connected by a middle pivot pin, the distal section coupled to the pin structure and the proximal section is couplable with the electro- mechanical actuator via upper and lower pivot pins, respectively.

4. The security system of claim 3, wherein the proximal section is pivotably connected to the lock assembly via a stationary pivot pin.

5. The security system of claim 1 , wherein the electro¬ mechanical actuator includes at least one solenoid, and further includes at least one sensor for sensing whether the pin structure is in the locked or unlocked position.

6. The security system of claim 1 , wherein the lock assembly includes an electronic control operatively coupled to the receiver and the electro-mechanical actuator, the electronic control includes a sensor which allows the electro-mechanical actuator to be actuated only when it provides a predetermined feedback signal.

7. A security system for cargo loading doors, comprising: a remote transmitter for transmittinα a radio signal: a receiver for receiving the radio signal from the remote transmitter; an electro-mechanical actuator coupled to the receiver for moving a pin structure between a locked position and an unlocked position; and a lock assembly for receiving the electro-mechanical actuator and adapted to being connected to an inside of a loading door, the pin structure is moveable with respect to the lock assembly via a linkage mechanism coupling the electro-mechanical actuator and the pin structure, for moving the pin structure to and from the locked position to the unlocked position, and the pin structure is adapted to being at least partially inserted into a portion of a header of a container when the pin structure is in the locked position and withdrawn from the header when the pin structure is in the unlocked position.

8. The security system of claim 7, wherein the linkage mechanism includes a distal section and a proximal section, the distal section coupled to the pin structure and the proximal section is couplable with the electro-mechanical actuator via upper and lower pivot pins, and the proximal and distal sections being coupled via a middle pivot pin.

9. The security system of claim 7, wherein the lock assembly includes an electronic control operatively coupled to the receiver and the electro-mechanical actuator, the electronic control includes a sensor which allows the electro-mechanical actuator to be actuated only when it provides a predetermined feedback signal.

10. A security system for cargo loading doors, comprising: at least one of a remote transmitter and electronic key for transmitting a signal; a receiver for receiving the signal from at least one of the remote transmitter and the electronic key; an electro-mechanical actuator coupled to the receiver for moving a pin structure between a locked position and an unlocked position; and a lock assembly adapted to hold the electro-mechanical actuator, and a linkage mechanism coupling the electro-mechanical actuator and the pin structure for moving the pin structure to and from the locked position to the unlocked position.