JP2009203604A - Latch device for door opening and closing handle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch device for a door opening and closing handle capable of removing a protruding part being an obstacle to an inner side of a warehouse and preventing the occurrence of distortion and deformation of related parts when unlocking a door from the inner side of the warehouse. <P>SOLUTION: This latch device for the door opening and closing handle is constituted by connecting a lock lever 16 with a front side of a fixed body 1 by using a shaft pin 15 being parallel with a hinge pin 3 to swing, providing an undercut part 18 engaging and disengaging with/from a locking projection 17 in a tip part of the lock lever 16 on a rear surface side of a movable body 2 to rotate and energize the lock lever 16 in the direction for engaging the locking projection 17 with the undercut part 18 by a spring 19 for lock lever provided between the fixed body 1 and the lock lever 16, and connecting one end side of a traction member 21 passing through the door 20 and the fixed body 1 with an operation projection 22 of the lock lever 16 provided on the opposite side to the locking projection 17 to rotate the lock lever 16 in the direction for releasing the engagement of the locking projection 17 with the undercut part 18 by pulling the traction member 21 toward a door user from the inner side of the warehouse. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a latching device used for a door opening / closing handle of a cargo storage of a lorry.

In the cargo storage of a lorry, the door is connected to the opening side column by a hinge, the lock shaft is inserted into the bearing bracket on the front side of the door, lock cams are provided at the upper and lower ends of the lock shaft, and the upper and lower frames of the cargo storage A cam keeper is provided on the material, and a door opening / closing handle is connected to the middle portion of the lock shaft by a horizontal pivot.
After the door is closed and rotated, the door is locked to the cargo storage box by appropriately rotating the lock shaft with the door opening / closing handle and engaging the lock cam with the cam keeper. This door opening / closing handle needs to be managed by an appropriate latching device so that a person other than the driver cannot operate to prevent theft of the cargo.

In the conventional latching device for door opening / closing handles, the middle part of the hook lever fitted in the split groove of the fixed body is connected to the fixed body by a support pin so that it can be raised and lowered, and the door opening / closing handle is constrained between the fixed body and the door. A hooking groove is provided on the back side of the hook part at the tip of the hook lever, and a spring mechanism is provided between the fixed body and the hook lever to rotate and bias the hook lever in the lying down or upright direction according to the position of the acting point. It is a thing.

In order to prevent the stored cargo from being stolen, the lock unit is incorporated in the fixed main body, and the hook lever is prevented from rotating upright by a lock plate connected to the rotor of the lock unit.
However, since the lock unit can only be operated from the front side of the door, the door was closed intentionally or accidentally while the driver or worker was working in the cargo storage, and was locked by the lock unit. Occasionally, drivers and workers are trapped in the cargo storage and cannot escape on their own.

Patent Document 1 discloses a latch device for a door opening / closing handle that allows a person who is trapped to escape by himself even if locked by a lock unit.
In this latching device, a connector is swingably attached to a fixed body, a claw at the tip of the connector is engaged with a locking recess provided on a movable body, and the connector can be pulled out to the inside of the door So that the connector is disengaged by pulling out the stopper, and then the door is pushed in from the cargo storage box so that the hook lever is laid down together with the movable body to unlock the latching device. I have to.

In this latching device, since the connector is configured to swing in the disengagement direction by its own weight by pulling out the stopper, the connector cannot be disengaged when the resistance of the rotation center portion of the stopper is large. In order to increase the reliability of unlocking the latching device from the inner surface side of the door, it is necessary to maintain the accuracy of processing and assembling of parts.
In addition, when unlocking from the inside of the cargo storage box, two operations were required: pulling out the stopper and pushing in the door.

As a latching device that can be unlocked from the inside by a series of pressing operations, there is one described in Patent Document 2.
In this latching device, a fixed seat plate attached to the door is provided with a pair of side walls, and the central portion of the hook lever is swingably supported in the bifurcated piece on the upper portion of the lever support body supported at the lower end portion by the side walls. The holding lever is pivotably attached to the lever support, and the holding lever is engaged with the engagement piece provided on the fixed seat plate so that the lever support is held upright and the door is slidable. Push the push rod that penetrates from the inner surface of the door and press the operation piece of the holding lever with the push rod to release the engagement of the holding lever, and push the push rod further to bring the hook lever together with the lever support. The door opening / closing handle is released.

In the latching device of Patent Document 1, since the case of the push rod protrudes at a right angle on the inside of the warehouse, a part of the cargo or a part of the worker's clothes or body becomes a push rod case when storing or taking out the cargo. I could hit or get caught, and it became an obstacle.
In addition, when a panicked worker or the like pushes the push pad more strongly than necessary, the related parts such as the holding lever may be distorted and deformed.

JP-A-9-287334 JP 2005-282011 A

An object of the present invention is to provide a latching device for a door opening / closing handle, in which an obtrusive protruding portion to the inside of the warehouse is eliminated, and distortion of related parts does not occur during unlocking operation from the inside of the warehouse. It is to be.

The feature of the invention of claim 1 is that the base end portion of the movable body 2 is connected to the fixed body 1 by the hinge pin 3 so as to be opened and closed, and the hook lever 5 fitted in the split groove portion 4 of the movable body 2 is supported by the support pin 6. A hooking groove portion 9 is provided on the back side of the tip hook portion 7 of the hook lever 5 to restrain the door opening / closing handle 8 so that it can be raised and lowered, and an acting point of force is provided between the fixed main body 1 and the hook lever 5. A spring mechanism 10 is provided for rotating and biasing the hook lever 5 in a lying or standing direction corresponding to the position, a lock unit 11 is provided on the fixed body 1, a lock plate 13 is connected to a rotor 12 of the lock unit 11, and a key In the latching device for the door opening / closing handle, the rotor 12 is rotated at 14 to move the lock plate 13 to the locking position where the lock plate 13 can be engaged with the rear surface of the proximal end of the hook lever 5.
The lock lever 16 is slidably connected to the front side of the fixed body 1 by a shaft pin 15 parallel to the hinge pin 3, and the undercut portion 18, which engages and disengages the locking projection 17 at the tip of the lock lever 16, is movable body 2. A lock lever spring 19 provided between the fixed main body 1 and the lock lever 16 is urged to rotate the lock lever 16 in the direction in which the engagement protrusion 17 and the undercut portion 18 are engaged, thereby providing a door. One end side of the pulling member 21 penetrating 20 and the fixed main body 1 is connected to the operation protrusion 22 of the lock lever 16 provided on the side opposite to the locking protrusion 17, and the pulling member 21 is pulled forward from the inside of the warehouse. Thus, the lock lever 16 is rotated in the disengagement direction of the engagement protrusion 17 and the undercut portion 18.

The feature of the invention of claim 2 is that, in addition to the above configuration of the invention of claim 1, when the lock lever 16 is rotated in the disengagement direction by the pulling member 21, it is movable by the front surface portion 23 of the locking projection 17. That is, the rear surface portion 24 of the main body 2 is pushed and the movable main body 2 is rotated in the opening direction.

The feature of the invention of claim 3 is that, in addition to the above-described configuration of the invention of claim 1 or 2, a window hole 25 communicating with the undercut portion 14 is provided on the front surface side of the movable body 2, and That is, the lock lever 12 is rotated in the disengagement direction.

In the latching device of the present invention configured as described above, after the driver closes the door 20, the lock shaft 27 is reversely rotated to engage a lock cam and a cam keeper (not shown), thereby opening and closing the door opening / closing handle. When 8 is pushed down and rotated around the horizontal pin 29, the door opening / closing handle 8 comes into contact with the cam slope 30 of the tip hook portion 7 of the hook lever 5, so that the hook lever 5 is rotated upright obliquely. When the door opening / closing handle 8 enters a predetermined position, the hook lever 5 is rotated in the lying down direction by the spring mechanism 10, and the door opening / closing handle 8 is engaged with the latching groove portion 9 of the hook lever 5.

As a result, the door opening / closing handle 8 is restrained by the latch device 32 and the door 20 is prevented from being opened.
To prevent the hook lever 5 from rotating upright in order to enhance crime prevention, insert an appropriate key 14 into the key hole 31 of the rotor 12 of the lock unit 11, and turn the rotor 12 in the locking direction with the key 14 to lock it. The plate 13 is moved to a position where it can be engaged with the rear surface of the proximal end portion of the hook lever 5.

When the driver or the worker is in the cargo storage box and the latching device 32 is locked from the outside of the warehouse by the lock unit 11 as described above, the worker or the like inside is pulled from the inside of the warehouse. The member 21 is pulled forward, the lock lever 16 is rotated around the shaft pin 15, and the pulling member 21 of the lock lever 16 is pulled out from the undercut portion 18 of the movable body 2.
When the center of gravity of the movable body 2 and the hook lever 5 assembly is at a position forward of the center of the hinge pin 3 with respect to the vertical line, the movable body 2 rotates downward around the hinge pin 3 due to the rotational moment due to gravity.

Even if the rotational moment due to gravity cannot be used due to the position of the center of gravity, when the lock lever 16 is rotated in the disengagement direction by the pulling member 21, the rear surface portion of the movable body 2 is caused by the front surface portion 23 of the locking projection 17. Since 24 is pushed, the movable body 2 is rotated downward around the hinge pin 3. As a result, the confined worker or the like presses the door 20 from the inside to escape.

A window hole on the front side of the movable main body 2 is used when an operator in the warehouse falls down due to an accident and cannot pull the towing member 21 or in an emergency situation where the key 14 is not prepared for a rescuer outside the warehouse. 25, the lock lever 12 is rotated in the disengagement direction. The coupling between the fixed main body 1 and the movable main body 2 is released, and the door 20 is opened by pulling the door 20 outward.

As described above, according to the first aspect of the present invention, the lock lever 16 is connected to the fixed main body 1 by the shaft pin 15, and the undercut portion 18 in which the locking projection 17 of the lock lever 16 engages and disengages is provided in the movable main body 2. The lock lever 16 is rotationally biased by a lock lever spring in the direction in which the stop protrusion 17 and the undercut portion 18 are engaged, and the pulling member 21 is placed on the operation protrusion 22 of the lock lever 16 provided on the opposite side of the locking protrusion 17. The lock lever 16 is rotated in the direction of disengagement of the locking projection 17 and the undercut portion 18 by pulling the pulling member 21 forward from the inside of the cabinet. Since only the pulling member 21 is exposed to the inside of the warehouse as the unlocking operation means 32, the amount of protrusion into the warehouse is markedly reduced compared to the conventional example using the push rod.

In the invention of claim 2, when the lock lever 16 is rotated in the disengagement direction by the pulling member 21, the rear surface portion 24 of the movable main body 2 is pressed by the front surface portion 23 of the locking projection 17, so that the movable main body 2 is moved. Since it is made to rotate in the opening direction, the unlocking operation of the latching device 32 from the inside of the warehouse can be easily and accurately performed by a single operation of pulling the pulling member 21 forward. Also, since there is a certain limit to the maximum value of the force applied to the lock lever 16 by the action of pulling by human power, if compared with the conventional push pad method that pushes the push pad too strongly over the entire weight. There is no risk of causing distortion problems of related parts such as the lock lever 16.

According to the third aspect of the present invention, a window hole 25 communicating with the undercut portion 18 is provided on the front surface side of the movable main body 2, and the lock lever 12 is rotated in the disengagement direction from the window hole 25. Even when an operator or the like cannot pull the pulling member 21 from the inside of the warehouse, when there is no key 14 of the lock unit 11, or when the lock unit 11 is out of order even if the key 14 is present, the latching device 32 is provided. Can be urgently unlocked, so that the latching device 32 can be safely mounted on the truck.

  In the illustrated embodiment of the present invention, as shown in FIG. 4, the fixing main body 1 includes a fixing tool 34 such as a screw passing through the upper left and right through holes 33 and a screw passing through the lower center through hole 35. The fixing tool 36 is fastened and fixed to the door 20 as shown in FIGS. As shown in FIGS. 4 and 5, the hinge pin 3 is fitted into a pin receiving portion 38 opened on the back side of the movable main body 2 through a horizontally long cavity portion 37 opened on the back side of the fixed body 1, and has a horizontally long U-shape. Both ends are pressed by the hinge pin holding plate 39. As shown in FIG. 6, the hinge pin pressing plate 39 is fastened and fixed to the movable main body 2 by two screws 40 on the left and right.

As shown in FIGS. 9 to 11, the shaft pin 15 and the lock lever 16 are integrally formed, and the two left and right locking protrusions 17 and the operation protrusion 22 are integrally formed at the tip of the lock lever 16. . As shown in FIGS. 4 and 5, the left and right end portions of the shaft pin 15 are fitted into the shaft pin receiving groove 41 of the fixed main body 1 opened on the back side, and pressed against the shaft pin pressing plate 42. Yes. The shaft pin holding plate 42 is fastened and fixed to the fixed body 1 by screws 43.

As shown in FIGS. 5 and 6, the spring mechanism 10 includes a spring support plate 44 fastened and fixed to the movable body 2 by two upper and lower screws 45 and two lower left and right screws 46, and the hook lever 5. A movable pin 48 inserted into the lateral hole 47 in the lower part of the spring, a spring guide plate 49 laid between the spring support plate 44 and the shaft rod 48, and an enlarged head 50 of the spring guide plate 49 fitted to the spring guide plate 49. A compression coil spring 52 is compressed between the inclined protrusions 51 of the spring support plate 44.

As shown in FIG. 5, the hook lever 5 is supported when the movable pin 48 is on the lower side with respect to the action reference line formed by connecting the support pin 6 of the hook lever 5 and the inclined protrusion 51 of the spring support plate 44 with a straight line. The tip hook portion 7 is in contact with the front surface of the fixed body 1 and is urged to rotate counterclockwise about the pin 6.
As soon as the movable pin 48 exceeds the action reference line, the action direction of the spring mechanism 10 is reversed, the hook lever 5 is urged to rotate clockwise about the support pin 6, and the hook lever 5 is flipped up. .

As shown in FIG. 5, the left and right end portions of the support pin 6 are fitted into the support pin receiving grooves 53 that are open on the back side, and the left and right step end portions of the spring support plate 44 are shown in FIG. 54. As shown in FIGS. 5 and 7, the lock plate 13 that is bent in an L shape prevents the hook lever 5 from rotating up by contacting the back surface of the base end portion of the hook lever 5. Yes.
The lock plate 13 is fastened and fixed to the rear end portion of the rotor 12 of the lock unit 11 by a mounting seat 55 and a screw 56.

An arc-shaped recess 58 is provided at the tip of the operation protrusion 22 of the lock lever 16, and a slot 57 that is long in the length direction of the arm of the operation protrusion 22 is provided in the wall. A spherical portion 62 at the end of the pulling member 21 is fitted in the arc-shaped recess 58. The pulling member 21 is passed through the slot 57. The pulling member 21 is further drawn into the cargo storage through the guide tube portion 63 of the fixed main body 1 and the through hole 64 of the door 20. As the pulling member 21, a plastic string, a wire rope, or the like is used.
When the spherical portion 62 rotates with respect to the arcuate recess 58 of the lock lever 16, the pulling member 21 moves in the slot 57 of the operation protrusion 22, and the pulling member 21 is optimal for pulling the operation protrusion 22. Can take a good posture.

A torsion coil spring is used as the lock lever spring 19, the coil portion is fitted to the shaft pin 15, one linear end is in contact with the spring abutting portion 60 of the fixed body 1, and the other linear end is Is in contact with the back surface of the operation projection 22.
The emergency unlocking window hole 25 of the movable main body 2 is normally closed by a cap 61. In the case of an emergency as described above, the cap 61 is removed, a suitable tool such as a screwdriver is inserted through the window hole 25, the front surface portion 23 of the operation projection 22 is pushed, and the locking projection 17 of the lock lever 16 is moved to the movable body 2. Escape from the undercut portion 18.

In the latching device 32 of the above embodiment, the pivot members such as the hinge pin 3 of the movable body 2, the support pin 6 of the hook lever 5, and the shaft pin 15 of the lock lever 16 are all hidden inside the fixed body 1 or the movable body 2. Therefore, there is no unauthorized unlocking by removing these blows, it is excellent in the anti-theft property, and the structure is simplified, so that the assembling workability is also good.
Since the pressing member for the support pin of the hook lever 5 is constituted by the left and right step ends 54 of the spring support plate 44, the number of components of the latching device 32 is reduced and the structure is simplified.

In the latching device 32 of the illustrated embodiment, the two left and right engaging projections 17 and 17 and the operation projections 22 and 22 of the lock lever 16 are arranged in exactly opposite positions, and both ends of the traction member 21 are moved to the left and right. Since the intermediate portion of the traction member 21 connected to the operation protrusions 22 and 22 and pulled out in a U shape from the two guide cylinder portions 63 on the left and right is pulled, the rotational force to the lock member 16 is the shaft pin 15. The two left and right locking projections 17 and 17 are pulled out from the undercut portions 18 and 18 at the same time without being biased, and the unlocking operation is performed accurately.

Further, in the latching device 32 of the illustrated embodiment, the shaft pin 15 of the lock lever 16 is disposed closer to the base surface 1 a of the fixed body 1 than the hinge pin 3 of the movable body 2. The locking surface 65 of the locking projection 17 is formed on an inclined surface in which the end point 65 a closer to the shaft pin 15 is farther from the base surface 1 a of the fixed body 1 than the end point 65 b far from the shaft pin 15. The locked surface 66 of the undercut portion 18 of the movable body 2 is inclined such that the end point 66 a closer to the shaft pin 15 is farther from the base surface 1 a of the fixed body 1 than the end point 66 b far from the shaft pin 15. Since the locking surface 65 of the locking projection 17 and the locked surface 66 of the undercut portion 18 are in contact between the shaft pin 15 and the support pin 6, The hinge pin 3 is moved by vibration shock Even if the rotational moment acting in a direction to open the movable body 2 as heart, blocking force is sufficiently high for it, never locking of the movable body 2 is released indiscriminately with respect to the fixed body 1.

Furthermore, in the latching device 32 of the illustrated embodiment, the arm length of the operation protrusion 22 of the lock lever 16 is sufficiently longer than the arm length of the locking protrusion 17 on the opposite side. 21 is pulled forward from the inside of the cabinet to cause the locking projection 17 to escape from the undercut portion 18 of the movable main body 2 and unlock the movable main body 2 with respect to the fixed main body 1. Even if the opening of the movable body 2 is not sufficient due to the rotational resistance, when the hand is released from the pulling member 21 at the end of the unlocking operation, the tip of the operation projection 22 reversed by the elastic repulsion of the lock member spring 19 Since the rear surface portion 24 of the movable body 2 is pushed and the movable body 2 is flipped up auxiliary, the inside unlocking operation can be performed reliably and reliably.

The latch device 32 may be reset by closing and rotating the movable main body 2 toward the fixed main body 1 around the hinge pin 3 from the front side of the door 20. In the middle of the closing rotation, the rear surface portion 24 of the movable main body 2 comes into contact with the tip of the operation projection 22 of the lock lever 16 which is lifted and rotated as shown in FIG. When the closing rotation of the movable body 2 is further continued, the lock lever 16 rotates counterclockwise around the shaft pin 15 against the bias of the lock lever spring 19, and the lock lever 16 is locked at the end of the closing rotation. The locking projection 17 of the lever 16 engages with the undercut portion 18 of the movable main body 2, and the movable main body 2 is locked again in the closed position.
In this way, the reset is easily and accurately performed by a single operation of closing and rotating the movable body 2.

It is a longitudinal cross-sectional view of the latch device of the door opening / closing handle concerning one Example of this invention, and has shown the state by which the lock | rock of the movable main body with respect to the fixed main body was cancelled | released. FIG. 2 is a front view of the latching device of FIG. 1, wherein the latching device is mounted on a cargo storage, and a door opening / closing handle is locked by the latching device. It is a left view of the latch apparatus of FIG. It is a rear view of the latch apparatus of FIG. It is the sectional view on the AA line of FIG. It is a rear view of the movable main body and lock lever assembly of the latch apparatus of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is a left view of the lock lever integrated in the latch apparatus of FIG. FIG. 10 is a front view of the lock lever of FIG. 9. FIG. 10 is a rear view of the lock lever of FIG. 9. It is a rear view of the fixed main body integrated in the latch apparatus of FIG. It is the DD sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed main body 2 Movable main body 3 Hinge pin 4 Split groove part 5 of movable main body Hook lever 6 Support pin 7 Hook part 8 of a lock lever Door opening and closing handle 9 Hook lever latching groove part 10 Hook lever biasing spring mechanism 11 Lock Unit 12 Locking unit rotor 13 Lock plate 14 Locking unit key 15 Shaft pin 16 Lock lever 17 Locking lever locking protrusion 18 Undercut portion 19 of movable body Locking lever biasing spring 20 Door 21 Pulling member 22 Locking lever Front projection part 24 of the locking projection 24 Rear part 25 of the movable main body Window hole 26 of the movable main body 26 Door 27 on the opposite side of the cargo storage 27 Lock shaft 28 Pin support plate 29 Horizontal pin 30 Hook lever cam slant 31 Locking unit Keyhole 32 latching device

Claims (3)

A base end portion of the movable body 2 is connected to the fixed body 1 by a hinge pin 3 so as to be opened and closed, and a hook lever 5 fitted in the split groove portion 4 of the movable body 2 is connected to the movable body 2 by a support pin 6 so as to be raised and lowered. A hooking groove 9 for restraining the door opening / closing handle 8 is provided on the back side of the hook portion 7 at the front end of the hook lever 5, and the hook lever 5 is laid down in accordance with the position of the acting point between the fixed body 1 and the hook lever 5. A lock mechanism 11 is provided on the stationary main body 1, a lock plate 13 is connected to the rotor 12 of the lock unit 11, and the rotor 12 is rotated by a key 14. In the latching device for the door opening / closing handle in which 13 is moved to a locking position that can be engaged with the rear surface of the proximal end portion of the hook lever 5,
The lock lever 16 is slidably connected to the front side of the fixed body 1 by a shaft pin 15 parallel to the hinge pin 3, and the undercut portion 18, which engages and disengages the locking projection 17 at the tip of the lock lever 16, is movable body 2. A lock lever spring 19 provided between the fixed main body 1 and the lock lever 16 is urged to rotate the lock lever 16 in the direction in which the engagement protrusion 17 and the undercut portion 18 are engaged, thereby providing a door. One end side of the pulling member 21 penetrating 20 and the fixed main body 1 is connected to the operation protrusion 22 of the lock lever 16 provided on the side opposite to the locking protrusion 17, and the pulling member 21 is pulled forward from the inside of the warehouse. Thus, the door opening / closing handle latching device is characterized in that the lock lever 16 is rotated in the disengagement direction of the locking projection 17 and the undercut portion 18. When the lock lever 16 is rotated in the disengagement direction by the pulling member 21, the rear surface portion 24 of the movable main body 2 is pressed by the front surface portion 23 of the locking projection 17, so that the movable main body 2 is rotated in the opening direction. The latching device for the door opening and closing handle according to claim 1. The door according to claim 1 or 2, wherein a window hole 25 communicating with the undercut portion 18 is provided on the front side of the movable body 2, and the lock lever 12 is rotated in the disengagement direction from the window hole 25. A latching device for the opening and closing handle.

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