JPH09150663A - Tail gate lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lock a tail gate after discharging loaded goods smoothly by installing the movable member of a tail gate lock device to a position in which the loaded goods are not adhered in discharging of the loaded goods from the load box. SOLUTION: When a tail gate lock device is released, a handle part 30 is turned and right/left both ends of the engaged part 23a of T type bolt member 23 is pulled apart from the rear end of the hook part 22a of each hook member 22 and further a handle part 30 is turned. The T type bolt member 23 and cylindrical member 25 as the movable member of the tail gate lock device are held to a holding member 26 and turned upward along with a table gate T by the engagement 26 for respective holding members 26 of right/left both ends of the engaged part 23a of this T type bolt member 23. When the loaded goods of a load box N is discharged from the backside of the load box N, it is prevented surely that the loaded goods are adhered to these T type bolt member 23 and the cylindrical member 25. Thereby, the tail gate T can be locked smoothly after discharging the loaded goods.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tailgate lock device for locking the tailgate of a luggage box mounted on a vehicle or the like.

[0002]

2. Description of the Related Art Generally, a vehicle is equipped with a luggage box, which is surrounded by at least front, rear, left and right side walls, on which a load can be loaded, and a rear wall of the luggage box has an upper end portion. A tailgate locking device is provided which is formed on a tailgate that opens and closes rearward so that it can be opened downward with respect to a fulcrum, and locks the tailgate when the tailgate is closed. As a specific configuration of this tailgate lock device, for example, as disclosed in Japanese Utility Model Laid-Open No. 7-21434,
A rod-shaped first member provided at the rear end of the luggage box, one end of which is swingably supported via a pivot shaft, and the other end of which has a male screw portion, and the first member of which is on the one end side. Corresponding to one end side of the second member, which has a female screw part to be screwed into the male screw part of the second member, and which is moved to the front or rear of the vehicle body by the turning operation of the handle part provided on the other end side A pair of front and rear facing walls that are provided below the lower end of the tailgate and that have notches that respectively open in the swinging direction of the first member and that allow the first and second members to be inserted therethrough and that face each other in the front-rear direction. And provided on the second member and abutting on a rear surface of the front facing wall when the second member moves to the front of the vehicle body,
It is known that the second member is provided with a collar portion that comes into contact with the front surface of the rear facing wall when the second member moves to the rear of the vehicle body. Then, when the tailgate is locked, the second member is moved forward of the vehicle body on the male screw portion of the first member by rotating the handle portion in a predetermined direction to move the handle portion itself forward of the vehicle body. By bringing the front surface of the collar portion into contact with the rear surface of the opposing wall of the, the tailgate is pressed against the rear portion of the luggage box, and the tailgate is locked in the rear portion of the luggage box while ensuring water tightness. On the other hand, when the tailgate is unlocked, the second member is moved rearward of the vehicle body on the male screw portion of the first member by the turning operation in the anti-predetermined direction for moving the handle portion itself rearward of the vehicle body by the handle portion. And retract the front of the collar from the rear of the rear facing wall,
In this state, by swinging the first member and the second member (handle portion) downward with the pivot shaft of the first member as a fulcrum, the flange portion of the second member is separated from the front and rear facing walls. The tailgate will be opened.

[0003]

However, in the tailgate locking device as described above, since one end of the first member is supported by the rear end of the luggage box via the pivot shaft, the tailgate is opened when the tailgate is opened. The first member and the second member both remain hanging at the rear end of the luggage box. Therefore, when the tailgate is opened and the load in the load box is discharged from the rear of the load box, the load is attached to the movable member of the tailgate lock device such as the first and second members, and the load is discharged. There is a drawback that the lock operation when locking the tailgate later cannot be performed smoothly.

The present invention has been made in view of the above points, and an object thereof is to place a movable member of a tailgate lock device at a position where the load does not adhere when the load is discharged from the luggage box. By providing it, the operation of locking the tailgate after discharging the load can be performed smoothly.

[0005]

Means for Solving the Problems In order to achieve the above object, a solution means provided by the present invention is to provide a load box, on which a load can be loaded, surrounded by at least front, rear, left and right side walls on a car frame. The tail wall of the luggage box, which is mounted, is formed with a tailgate that opens and closes rearward so that the tailgate can be opened and closed backward at the upper end as a fulcrum. And A hook member provided at a rear end of the luggage box; a first member having an engaging portion engageable with the hook member at one end and a male screw portion at the other end side; A support member that is provided at the lower end of the tailgate and that swingably supports the first member between an engageable position with respect to the hook member and a retracted position, and is screwed to one end of the male screw portion of the first member. A first member having a female screw portion that is located at an engageable position by relative movement of the male screw portion and the female screw portion in the vehicle body front-rear direction due to a rotation operation of a handle portion provided on the other end side. A second member that moves in the front-rear direction to engage and disengage the engaging portion of the first member with the hook member, and the first and second members provided at the lower end of the tailgate. Moves to the retracted position by swinging around the support member as a fulcrum. It is obtained by a configuration and a gripping member for gripping the handle portion of the second member.

With this configuration, in the present invention, when the tailgate locking device is locked, the first member and the female screw portion on the male screw portion on the other end side of the first member are closed after the tailgate is closed. The second member to be screwed is rocked with the support member as a fulcrum to an engageable position where the engaging portion of the first member engages with the hook member at the rear end of the luggage box. In this state, the handle portion on the other end side of the second member is pivotally operated in a predetermined direction (for example, clockwise), and the first member and the second member, which are screwed with each other, are engaged by relative movement in the vehicle body front-rear direction. The first member located at the possible position is moved in the front-rear direction of the vehicle body so that the engaging portion of the first member engages with the hook member, whereby the tailgate is locked to the rear portion of the luggage box while ensuring watertightness. Then, the locked state of the tailgate by the tailgate lock device is completed.

On the other hand, when the tailgate lock device is released, the handle portion is rotated in a counter-predetermined direction (for example, counterclockwise), and the first member and the second member are moved relative to each other in the vehicle front-rear direction. The first member located at the mating position is moved in the vehicle front-rear direction to release the engagement between the engaging portion of the first member and the hook member, and release the lock state of the tailgate by the tailgate lock device. Then, the first member and the second member are swung with the support member as a fulcrum to the retracted position where the engaging portion of the first member cannot engage with the hook member at the rear end of the luggage box, and the handle of the second member is swung. The tailgate can be opened by gripping the portion with the gripping member of the tailgate. In that case, the first and second members as movable members of the tailgate lock device are gripped by the gripping members and rotate upward together with the tailgate, so that the load in the cargo box from behind the cargo box can be increased. When discharging, the load is reliably prevented from adhering to the first and second members, and the operation for locking the tailgate after discharging the load can be performed smoothly.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 4 shows the structure of a vehicle V in which a luggage box using the tailgate lock device according to the embodiment of the present invention is mounted, and 1 is an underframe of the vehicle V connected to the rear portion of the cabin C. , SC is a sub-chassis provided on the underframe 1,
Reference numeral 2 denotes a tilting frame pivotally supported around a horizontally extending axis O at a rear end portion of the sub chassis SC.
Is a substantially L-shaped undulating frame connected to the front portion of the tilting frame 2 so as to be undulating around an axis P extending in the horizontal direction. The undulating frame 3 has a tubular guide member 6 extending horizontally forward from a base end (rear end) connected to the tilting frame 2, and a substantially L-shaped guide member 6 slidably fitted in the guide member 6. The guide member 6 is composed of a V-shaped sliding member 7 and a retractable telescopic cylinder 8 linked between the guide member 6 and the sliding member 7.
The sliding member 7 slides with respect to the. At the front end of the undulating frame 3 (the front end of the sliding member 7), a packing box transporting hook F detachable from an engaging pin Na provided at the center of the front upper end of the front wall 9b of the packing box N. Is provided.

A base shaft 11a is pivotally supported at a portion near the rear end of the horizontal portion of the undulating frame 3, and a pair of lift cylinders 11 (fixed to the underframe 1 are fixed in front of the shaft 11a. (Only one side is shown in the drawing) is connected, and the tip is rotatably supported around a shaft 12 extending in the horizontal direction. That is, when the lift cylinder 11 is extended, the undulating frame 3 is rotated rearward to be in an upright state, and when the lift cylinder 11 is contracted, the undulating frame 3 is rotated forward to be in an upright state. I have. Reference numeral 15 denotes a guide roller for moving the container provided on the sub-chassis SC.

Further, the packing box N is formed to have a width substantially matching the width of the vehicle V, and a floor bottom 9a having a front-rear length slightly longer than that of the underframe 1, and the floor bottom 9a is surrounded by front, rear, left and right. , The front and rear walls 9b, 9c and the left and right side walls 9d, 9e formed at a height substantially corresponding to the cabin C. The rear wall 9c is located at the upper rear end position of the left and right side walls 9d, 9e. The tailgate T is rotatably supported by a shaft (not shown) extending in the vehicle width direction and is opened and closed rearward so as to be opened downward. FIG.
As shown in FIG. 3, a main girder 14 (only one of which is shown in the drawing) whose side end extends in the vehicle body front-rear direction is provided on the lower surface of the floor bottom 9a of the packing box N, and the main girders 14 are separated from each other. Horizontal girders 14a, ... Which are connected at predetermined intervals in the vehicle body front-rear direction are provided. The packing box N contains moisture-containing incineration ash, which is formed by adding moisture to incineration ash obtained by incinerating easily combustible dust such as kitchen garbage, or moisture collected at rivers or beaches. It is applied as a dust container in which sand or the like is loaded as a load in the packing box N.

Here, an operation procedure for loading and unloading the cargo box N between the vehicle underframe 1 (on the sub chassis SC) and the ground by the container cargo handling vehicle V, and tilting for tilting the cargo box N on the undercarriage 1 are performed. Describe the procedure.

First, when the luggage box N is lowered to the ground from the mounted state shown in FIG. 4, the telescopic cylinder 8 is contracted to move the luggage box N rearward, and the rear portion thereof is rearwardly larger than the underframe 1. To move. Next, when the undulating cylinder 11 is gradually extended, only the undulating frame 3 of the tilting frame 2 is bent, and the packing box N is slid on the guide roller 15 by its own weight,
It is made to wholesale on the ground. Further, mounting on the chassis frame 1 is performed by performing an operation reverse to the above operation.

On the other hand, when the packing box N is tilted from the state shown in FIG. 4, if the hoisting cylinder 11 is extended without changing the retracting cylinder 8, the tilting frame 2 as a whole rotates around the axis O. It tilts backward and tilts the packing box N.

Further, a pair of left and right pins 16 (only one of which is shown in the drawing) is provided at the lower end of the tailgate T (rear wall 9c) of the packing box N, and hooks for engaging and disengaging the respective pins 16 ( (Not shown) is pivotally supported at the rear end of the main girder 14 of the packing box N. Each of the hooks is held in a locked state that engages with each pin 16 when the load box N is loaded and when the load box N is loaded and unloaded as shown in FIG. 4, while being detached from each pin when the load box N is tilted. When the tailgate T is opened by turning to open the tailgate T, and when the luggage box N is returned from the tilted state, each hook is turned by turning to lock the tailgate T.

As a characteristic part of the present invention, as shown in FIGS. 1 to 3, the left and right rear portions of the packing box N,
Between the tailgate T and the tailgate T, moisture in the load in the cargo box N drips from between the rear end of the floor bottom 9a and the rear ends of the left and right side walls 9d and 9e and the contact surface of the tailgate T. Not to
A pair of left and right tailgate locking devices 21 for locking the tailgate T with respect to the luggage box N while ensuring watertightness.
(Only the left side of the vehicle body is shown in the figure).
The tailgate lock devices 21 are located inward of the pins 16 in the vehicle width direction.

Each of the tailgate lock devices 21 (only the left one will be described because it has the same structure) has a rear end girder 14a extending over the rear surface of the main girder 14 and the bottom surface 9a of the bottom of the cargo box N. A pair of left and right hook members 22, 22 each having an upper portion attached to the lower portion and a hook portion 22a cut out in a substantially semi-track shape in the lower portion, and a bar shape extending in the left-right direction of the vehicle body so that both left and right ends can be engaged with each hook member 22. Engaging portion 23a
Is provided at one end and has a male screw portion 23b at the other end as a first member, and a T-shaped bolt member 23 provided at the lower end of the tailgate T, with respect to each hook member 22. Swing in the front-rear direction between the engageable position (the state where the engaging portion 23a is located inside the hook portion 22a) and the retracted position (the state where the engaging portion 23a is not located inside the hook portion 22a). As a second member having a supporting member 24 that freely supports it, and a female screw portion 25a that is screwed to the male screw portion 23b of the T-shaped bolt member 23 at one end side and a cylindrical tubular portion 25b at the other end side. The tubular member 25 and the T-shaped bolt member 23 and the tubular member 25, which are provided at the lower end of the rear surface of the tailgate T, swing when the support member 24 is a fulcrum and move to the retracted position. Tubular part 2 of 25
5b a pair of left and right gripping members 26, 26 for gripping both left and right ends
And

The support member 24 has a U-shaped bracket 27 whose upper end is attached to the lower surface of the tailgate T and has a substantially U-shaped cross section and which opens rearward, and the U-shaped bracket 2.
7 has a swinging piece 29a that is swingably supported in the front-rear direction via a pin 28 in a U-shaped cross section and has a male screw portion 23b of the T-shaped bolt member 23 inserted in a lower portion thereof. It is composed of a tubular bracket 29 having a cylindrical support portion 29b which is loosely fitted and supported. Further, the cylindrical member 25 relatively moves in the vehicle front-rear direction between the male screw portion 23b and the female screw portion 25a that are screwed together by the rotation operation of the rod-shaped handle portion 30 that is inserted into the cylindrical portion 25b. By doing so, the T-shaped bolt member 23 located at the engageable position is moved rearward of the vehicle body so that the engaging portion 23a of the T-shaped bolt member 23 is engaged with the hook portion 22a of each hook member 22, and the engagement thereof is performed. It is configured to release the match. When the left and right ends of the engaging portion 23a of the T-shaped bolt member 23 are located at the engageable positions (the positions indicated by the solid line and the alternate long and short dash line in FIG. 1) with respect to the hook portions 22a of the hook members 22, The swinging piece 29a of the tubular bracket 29 has its front surface abutting on the bottom portion of the U-shaped bracket 27 to prevent further swinging forward, and the rear surface (the other end surface) of the tubular bracket 29. ) Is in contact with the front surface (one end surface) of the tubular member 25. On the other hand, when the left and right ends of the engaging portion 23a of the T-shaped bolt member 23 are located at the retracted position (the position indicated by the chain double-dashed line in FIG. 1) with respect to the hook portion 22a of each hook member 22, the tubular shape The swinging piece 29a of the bracket 29 is swinging rearward, and the tubular member 25 is separated from the tubular bracket 29 by the engagement with the gripping members 26 at the left and right ends of the tubular portion 25b, and the T-shaped bolt member 23. In addition, it is held in a suspended state by its own weight.

Here, the tailgate lock device 21 is provided.
The operating procedure of will be described. First, when the tailgate lock device 21 is locked, the tailgate T is closed, and then the T-shaped bolt member 23 and the male screw portion 23b on the rear end side of the T-shaped bolt member 23 are screwed with the female screw portion 25a. The mating tubular member 25 and the pin 28 of the tubular bracket 29
Swing forward with the fulcrum as the fulcrum. At this time, the front surface of the tubular member 25 is in contact with the rear surface of the tubular bracket 29, and the T-shaped bolt member 23 and the tubular member 25 together with the tubular bracket 29 are the swinging pieces 29 a of the tubular bracket 29. Is swung forward in the vehicle body until it comes into contact with the bottom of the U-shaped bracket 27. When the swinging piece 29a of the tubular bracket 29 comes into contact with the bottom of the U-shaped bracket 27, the left and right ends of the engaging portion 23a of the T-shaped bolt member 23 can be engaged with the hook portions 22a of the hook members 22. The tubular portion 25b of the tubular member 25 in this state.
The T-shaped bolt member 23 is moved to the rear of the vehicle body by rotating the handle portion 30 inserted therein in a predetermined direction (for example, clockwise). Accordingly, the engaging portion 2 of the T-shaped bolt member 23
3a moves to the rear of the vehicle body at the engageable position to move the hook member 2
2 is abutted on the rear end of the hook portion 22a, and further the handle portion 3
By rotating 0 in a predetermined rotation, each hook member 22
A state in which the pushing force of the left and right ends of the engaging portions 23a of the T-shaped bolt member 23 with respect to the rear end of the hook portion 22a is increased, the tailgate T is pressed against the rear end of the packing box N, and the tailgate T is watertight. Locked at the rear end of the packing box N,
The locked state of the tailgate T by the tailgate lock device 21 is completed.

On the other hand, when the tailgate lock device 21 is released, the handle portion 30 is rotated counterclockwise (for example, counterclockwise) to engage the engaging portion 23 of the T-shaped bolt member 23.
a Left and right ends of the hook member 22 are separated from the rear end of the hook portion 22a, and the handle portion 30 is rotated counterclockwise to engage the engaging portion 23a of the T-shaped bolt member 23 and the left and right ends of the hook member 22. A fastening release force to the front of the vehicle body acts between the rear end of the hook portion 22a and the engaging portion 23a of the T-shaped bolt member 23 moves to the front in each hook portion 22a (engageable position) and the tail portion moves. The gate T is separated from the rear end of the packing box N. Then, the pin 2 of the tubular bracket 29
T-shaped bolt member 23 and tubular member 25 having 8 as a fulcrum
Of the T-shaped bolt member 23 becomes possible.
The engaging portion 23a of is disengaged from the inside of the hook portion 22a of the hook member 22 and is positioned at the retracted position. At this time, the handle portion 30 is pulled out from the inside of the tubular portion 25b of the tubular member 25. Then, the male screw portion 23b of the T-shaped bolt member 23 moves in the support portion 29b of the tubular bracket 29, the T-shaped bolt member 23 and the tubular bracket 29 are separated from each other, and the engaging portion of the T-shaped bolt member 23. The T-shaped bolt member 23 and the tubular member 25 are gripped on the rear surface of the tailgate T by engaging the left and right ends of 23a with the respective gripping members 26 on the rear surface of the tailgate T, and the tailgate locking device 21 locks the tailgate T. The tailgate T can be opened by releasing the state. In that case, the T-shaped bolt member 23 and the tubular member 2 as the movable member of the tailgate lock device 21.
5 is gripped by the gripping member 26 due to the engagement with the gripping members 26 at the left and right ends of the engaging portion 23a of the T-shaped bolt member 23, and rotates upward together with the tailgate T. When the load in the luggage box N is discharged from the load box, the load is reliably prevented from adhering to the T-shaped bolt member 23 and the tubular member 25, and the tailgate T is locked when the load is discharged. The operation can be performed smoothly.

In the above embodiment, the tailgate lock device 21 is provided at the lower left and right positions of the tailgate T, but the tailgate lock device 21 may be provided at the lower end positions of both left and right sides of the tailgate.

In the above-mentioned embodiment, the floor bottom 9a is surrounded by the front, rear, left and right sides, but the cargo box N is surrounded by the floor bottom from above. good.

Further, in the above embodiment, the handle portion 30
Although it is configured as a bar-shaped member that can be inserted into and removed from the tubular portion 25b of the tubular member 25, it may be a bar-shaped handle portion that cannot be inserted or removed or a wheel-shaped member.

[0024]

As described above, according to the tailgate lock device of the present invention, when the first and second members move to the retracted position, the handle portion of the second member is held by the holding member of the tailgate. By rotating the movable member together with the tailgate upward, it is possible to reliably prevent the load from adhering when the load is discharged from the cargo box, and to smoothly perform the locking operation of the tailgate after discharging the load. it can.

[Brief description of the drawings]

FIG. 1 is a side view of a tailgate lock device according to an embodiment of the present invention viewed from a side of a vehicle body.

FIG. 2 is a rear view of the tailgate lock device as viewed from the rear of the vehicle body.

3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is a side view of the vehicle with the luggage box installed.

[Explanation of symbols]

 1 Chassis frame 9b Front wall 9c Rear wall 9d Left side wall 9e Right side wall 21 Tailgate locking device 22 Hook member 23 T-type bolt member (first member) 23a Engaging portion 23b Male screw portion 24 Supporting member 25 Cylindrical member (second portion) Member) 25a Female screw portion 26 Gripping member 30 Handle portion N Packing box T Tailgate

Claims (1)

[Claims] 1. A luggage box, which is surrounded by at least front, rear, left, and right side walls and is capable of loading a load, is mounted on a chassis frame, and a rear wall of the luggage box is lowered rearward with an upper end as a fulcrum. A tailgate locking device that is formed on a tailgate that opens and closes so that it can be opened and closed and that locks the tailgate when the tailgate is closed. The hook member is provided at the rear end of the luggage box, and the hook is provided at one end. A first member having an engaging portion engageable with the member and having a male screw portion on the other end side; and a position provided at the lower end of the tailgate for engaging the first member with the hook member. And a retracted position, and a support member swingably supported between the retracted position and a retracted position, and a handle portion provided on the other end side with a female screw portion threadedly engaged with the male screw portion of the first member on one end side. In front of the body of the male screw part and the female screw part by operation A second member that moves the first member located at the engageable position in the front-rear direction of the vehicle body by relative movement in the direction to engage the engaging portion of the first member with the hook member and release the engagement. A gripping member that is provided at the lower end of the tailgate and that grips the handle portion of the second member when the first and second members swing about the supporting member as a fulcrum and move to the retracted position. A tailgate lock device characterized by being