JP2011031694A - Lock device of load receiving lift table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably fix a load receiving lift table in a rearward resting state and to facilitate operations of an opening/closing door and the like. <P>SOLUTION: A vehicle 1A is provided with a cargo box body 1 having an opening 2 formed therein, the biparting opening/closing door 5 at the opening 2 in a horizontally swingable manner, and with the load receiving lift table 17 that moves up and down. The load receiving lift table 17 is provided to be able to rise rearward and upward. A side face 17C of the load receiving lift table 17 is provided with a locking pin 24 which moves with a retractable distal end 24A in response to a second operating section 23 of the load receiving lift table 17. A side frame member 4 as a side part of the opening 2 is provided with a base end 16A of a locking bearing member 16 having an insertion hole 26 into which the pin 24 can be inserted such that the locking bearing member can swing horizontally. The side face 17C is provided with a lock receiving holding member 25 to which the locking bearing member 16 can be externally fit in a loose condition. In response to the swinging of the opening/closing door 5 for opening/closing, the locking bearing member 16 can swing in a co-rotating manner as well. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lock device for a load receiving platform in a vehicle such as a truck.

  Conventionally, a cargo box body is provided at the rear of a vehicle such as a lorry as this type, and an opening for taking in and out the luggage is provided at the rear end of the cargo box body in the vehicle front-rear direction. On the left and right sides of the unit, there are provided kannon type doors that can be opened and closed by turning in the horizontal direction, and at the rear of the cargo box body in the vehicle front-rear direction by a drive unit equipped with a hydraulic cylinder There is a load receiving platform that moves up and down along the direction of the load receiving platform, so that the load receiving platform can be turned to the rear to load and unload, or when it is running or not in use. You can stand up.

  The opening / closing door is provided with a tightening portion for tightening the opening / closing door to the closed state of the opening so that the opening / closing door can be fixed to the closed state (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2003-175761

  In the prior art, further, an upward fixing means for the load receiving platform is generally provided so that the load receiving platform is not inadvertently tilted to the rear side when the load receiving platform is facing upward. In the upward fixing means of the lifting platform, for example, the L-shaped round bars arranged on both sides can be rotated 90 degrees and locked to the lock receiver, as in the fixing means of the loading plate of the loading platform. Has been done.

  However, in such a fixing means, since the fixing device is independently left and right, the number of operations when performing the fixing operation and the releasing operation thereof is increased. Further, in the conventional device, if the lock receiver is not fixed, there is a risk that the lock rod is detached from the lock receiver due to left and right touches during traveling, and the load receiving platform is tilted backward and opened. Furthermore, there is a problem that the lock receiver protrudes rearward, and when the opening and closing door is opened, the opening and closing door hits the lock receiving and the opening and closing door cannot be opened widely.

  The problem to be solved is to provide an opening / closing door that opens and closes horizontally by opening and closing the opening of the cargo box. The load receiving platform is moved up and down on the outside of the opening and closing door, and the load receiving platform can be raised and lowered freely. In the lock device for the load receiving platform, the operation of fixing the load receiving platform in the rear standing state can be performed reliably, and the fixing and releasing operation of the load receiving platform can be easily performed. is there.

  The invention according to claim 1 is an opening formed in a cargo box body provided in a vehicle, an opening / closing door that is pivotable in a horizontal direction with respect to the opening, and can be opened and closed, and an outside of the opening Is provided with a load receiving lifting platform that moves up and down in a vertical direction, the load receiving lifting platform is provided so as to be able to undulate outward and upward, and the load receiving lifting platform is responsive to a locking operation portion of the load receiving lifting platform. A lock receiving member that can lock the lock receiving member, and a base end of the lock receiving member that can be locked by the lock portion is provided on the opening side. It is the lock device of the load receiving lifting platform characterized by having provided.

  According to a second aspect of the present invention, there is provided an opening formed at a rear end portion in the vehicle front-rear direction of a cargo box body provided in the vehicle, and an opening / closing provided so as to be able to be opened and closed by rotating horizontally with respect to the opening. A load receiving platform that moves up and down is disposed at a position behind the door and the opening, and the load receiving platform is provided so as to be able to undulate backward and upward, and the load receiving platform is disposed on a side surface of the load receiving platform. A locking pin that responds to the locking operation portion is provided so as to be able to protrude and retract, and a lock receiving member having an insertion portion into which the locking pin can be inserted is horizontally rotatable so that a base end thereof is on the side portion of the opening The locking receiving member is provided with a biasing means for biasing the tip of the fixing receiving portion backward, and a lock receiving holding member capable of loosely fitting the locking receiving member is provided on the side surface. This is a lock device for the load receiving platform.

  According to a third aspect of the present invention, a lock pin that responds to one of the lock operation portions is provided on both side surfaces of the load receiving platform so as to be able to protrude and retract, and the lock receiving members are provided on the side portions on both sides of the opening. The lock receiving holding members are respectively provided on both side surfaces of the load receiving lifting platform, and these lock receiving holding members are provided in a retracted position or the same planar position from the base surface of the load receiving lifting stand. 3. A lock device for a cargo receiving lift according to claim 2, wherein

  According to the first aspect of the present invention, the lock portion can be locked to the lock receiving portion, and the lock receiving portion can be externally fitted to the lock receiving portion so that the locked state can be held, and the opening / closing rotation of the door In response to this, the lock receiving member can also be rotated like a turn, and the lock receiving member does not interfere.

  According to the invention of claim 2, it is possible to prevent the lock pin from being detached from the lock receiving member by holding the lock receiving member by externally fitting the lock receiving holding member to the lock receiving member, Since the lock receiving member can be horizontally rotated, the lock receiving member can also be provided in response to the opening / closing rotation of the opening / closing door, and the opening / closing rotation of the opening / closing door can be performed without being obstructed by the locking receiving member. be able to. Further, by providing an urging means for urging the front end of the fixing receiving portion backward, when the locking operation is operated by operating the fixing operating portion, the locking pin is inserted into the insertion portion of the locking receiving member. It can be securely inserted and locked.

  According to the invention of claim 3, by operating one of the locking operation portions, the lock receiving members and the locking pins provided on both sides of the opening formed in the rear end portion of the cargo box body. Engagement and disengagement can be performed at a time, and it is possible to easily fix and release the load receiving platform. In addition, since the lock receiver holding member is provided in a retreat position or the same planar position from the base surface of the load receiving platform, it is possible that a load placed on the base surface in a lateral state hits the lock receiver holding member. Absent.

It is a plane sectional view in the state where the door which shows Example 1 of the present invention was closed. It is a plane sectional view in the state where the door which shows Example 1 of the present invention opened. It is a perspective view of the back-hanging state in which the load receiving lift is upward. It is a perspective view in the state where the cargo receiving lifting platform is rearward and horizontal. It is a perspective view of the principal part. It is a disassembled perspective view of the principal part.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  The figure shows Example 1, and a cargo box body 1 is provided on the rear part of a chassis of a vehicle 1A such as a truck. An opening 2 for taking in and out a load (not shown) is provided at the rear end of the packing box body 1. An upper frame member 3 and a side frame member 4 are provided on the upper side and the left and right sides of the gate of the opening 2, and an opening / closing door 5 capable of closing the opening 2 is provided. The open / close doors 5 are provided as a pair of left and right doors, and one open / close door 5 is provided so that the side edges thereof can be horizontally rotated via hinge metal fittings 6 arranged on one side frame member 4 vertically. . The other open / close door 5 is similarly provided on the other side frame member 4. In the figure, reference numeral 5A denotes a seal member provided on the open / close door 5 so that the opening 2 can be sealed.

  When the opening / closing door 5 is opened, the door 5 rotates so as to be able to follow the side plates 7 arranged on the left and right sides of the cargo box body 1. The pair of left and right open / close doors 5 are each provided with the first operation portion 9 of the lock device 8 for closing the door. The opening / closing door locking device 8 includes a lever-like first operation portion 9 that is shown on the rear surface of the one-side opening / closing door 5, the other-side opening / closing door 5, and the first operation portion 9. An operating rod 10 that rotates in the vertical direction and cams 11 provided at the upper and lower ends of the operating rod 10 are provided. The cam 11 is an opening in the floor surface 12 of the upper frame member 3 and the cargo box body 1. It can be engaged with cam latches 14 as support members provided on the floor frame members 13 arranged in the section 2. In the figure, reference numeral 15 denotes a plate-like contact member provided on the rear surface of the pair of left and right opening / closing doors 5. The contact member 15 is a pair of left and right locking receiving members 16 described later while the opening / closing door 5 is opened. And abut against each other.

  The load receiving platform 17 provided at the rear, which is outside the opening 2, vertically extends from the height position of the floor surface 12 of the cargo box body 1 to the ground in a horizontal state with its tip 17 </ b> A protruding rearward. The slider 18 connected to the left and right sides of the base end 17B is slidably provided on the guide frame 19 extending downward in the one side frame member 4 and the other side frame member 4. It has been. This is so that the left and right sides of the base end 17B of the load receiving platform 17 can be rotated between a rearward-facing state and an upward-facing horizontal state via a horizontal shaft 20 at the rear part of the slider 18, The front portion of the slider 18 is inserted through an opening 19A formed in the vertical direction on the rear surface of the guide frame 19, and one end of a wire rope (not shown) is connected to the upper portion of the slider 18. The end is connected to the actuator side of a hydraulic cylinder (not shown) provided in the floor frame member 13, and by operating the hydraulic cylinder, the slider 18 and thus the load receiving platform 17 can be raised and lowered.

  Next, the stowage lifting platform 17 is fixed at the height of the floor frame member 13 so as to fix the stowage lifting platform 17 so as to face the closed door 5. A locking device 22 is provided. This rear standing lock device 22 is for a one-side lock which is a second operation part 23 which is a lock operation part on the load receiving platform 17 side and a pair of left and right lock parts which respond to this one second operation part 23. A pin 24 and a lock pin 24 on the other side are provided, and the tip 24A of the pair of left and right lock pins 24 slides and protrudes from the left and right side surfaces 17C and 17C of the load receiving lift 17 toward the left and right sides. On the other hand, a flat base surface 17D on which a load (not shown) can be placed is formed on the opening 2 side between the left and right side surfaces 17C, 17C. On the other hand, on the rear surface of the one side frame member 4 and the rear surface of the other side frame member 4 on the packing box main body 1, a load receiving lift 17 is in a rear-standing state, and one side locking pin 24, the other side locking pin 24, Opposite to each other, there are provided one-side locking receiving members 16 to which the one-side locking pin 24 and the other-side locking pin 24 can be respectively engaged and disengaged. Further, the left and right side surfaces 17C, 17C of the load receiving platform 17 cover the outer side of the tip 24A of the locking pin 24 in a protruding state, respectively, and when the load receiving platform 17 is in the rear-standing state, the lock receiving member 16 Opposing to each other, lock receiving holding members 25 for loosely fitting these locking receiving members 16 are provided.

  The second operation unit 23 is located near one side of the rear surface of the load receiving platform 17 in the rear-standing state, and is pivoted in the vertical direction along the rear surface at substantially the center of the rear surface height of the load receiving platform 17. It is formed by a handle lever. Then, the base end of the locking pin 24 is connected to the second operating portion 23, respectively. Therefore, by rotating the second operating portion 23, for example, via a link mechanism (not shown) 24 is moved horizontally to the left and right, and its tip 24A protrudes from the left and right side surfaces 17C and 17C of the load receiving platform 17, and on the other hand, it is rotated so as to return the second operation portion 23. The tip 24 </ b> A is returned by horizontal movement, and is provided so as to be immersed from the left and right side surfaces 17 </ b> C and 17 </ b> C of the load receiving platform 17.

  The lock receiving member 16 is formed by a vertically-oriented plate-like movable member in which an insertion portion 26 through which the tip 24A penetrates is provided in a state where the tip 24A of the lock pin 24 protrudes from the left and right side surfaces 17C and 17C. The base end 16A of the lock receiving member 16 is rotatably provided on a bracket 28 as a mounting seat via a rotation center shaft 27 with the shaft core 27A directed in the vertical direction. The bracket 28 is fixed to the side frame member 4. In the embodiment, the lock receiving member 16 is disposed slightly above the lower hinge bracket 6, and both the shaft core 6 </ b> A and the shaft core 27 </ b> A of the hinge bracket 6 are within the rearward range of the rear surface of the side frame member 4. Thus, in the embodiment, they are arranged substantially on the same axis. Note that the rearward end 16B of the lock receiving member 16 is inclined to the outside, that is, one side with the included angle A within 45 degrees with respect to the longitudinal direction of the lock receiving member 16 in plan view. The bracket 28 is open on both the rear and left and right sides, and the tip 16B of the lock receiving member 16 can turn around the outside of the state collar 30 in the rearward direction with the rotation center shaft 27 as the center of rotation. ing. Further, the locking receiving member 16 is provided with a biasing means 29 so that the tip 16B is always directed rearward. In the embodiment, the urging means 29 is formed by a coil spring wound around the rotation center shaft 27 via a cylindrical collar 30. One end 29A of this coil spring is connected to the lock receiving member 16, and the other. By connecting the end 29B to the bracket 28, the tip 16B is always directed rearward. A stopper 31 is provided so that the lock receiving member 16 does not face inward when the lock receiving member 16 turns from the rear to the inner side so that the lock receiving member 16 does not face inward. This is because a stopper 31 whose position can be adjusted by a screw that the locking receiving member 16 is engaged is provided on the base end 16A side, and the stopper 31 is engaged with a stopper receiving portion 31A provided on the bracket 28 so that the inner side Is prevented from rotating. The stopper member 31 may be provided so that the lock receiving member 16 faces rearward only by the biasing means 29.

  The lock receiving and holding member 25 is formed of a U-shaped plate material in the back view penetrating in the front-rear direction on the left and right side surfaces 17C and 17C of the load receiving platform 17 in the rear standing state, and both ends 25A of the locking pins 24 The front end 16B of the lock receiving member 16 is formed so that the front end 16B of the lock receiving member 16 can penetrate inside the lock receiving holding member 25. The front lateral width B of the front opening is formed larger than the rear lateral width C of the rear opening. Further, the end surface 25B on the opening 2 side of the lock receiving holding member 25 is set backward in the rear surface of the base surface 17D or is formed in the same surface. Therefore, when the base surface 17D is in a horizontal state, the base surface The end face 25B does not protrude upward from 17D. In the embodiment, the end face 25B is shown as being retracted.

  In the figure, reference numeral 32 denotes a door stopper provided on each of the open / close doors 5 and can be temporarily fixed to a stopper receiving portion (not shown) provided on the side plate 7.

  Next, the operation of the above configuration will be described. When the vehicle 1A is traveling, the pair of left and right open / close doors 5 is locked and fixed in the open / close door lock device 8 because the cam 11 is engaged with the cam latch 14. Further, in the load receiving elevator 17 in the rearward standing state, the front end 16B of the lock receiving member 16 is inserted into the lock receiving holding member 25, and the front end 24A of the locking pin 24 penetrates the insertion portion 26. Thus, the load receiving platform 17 is locked.

  Next, when loading / unloading the package into / from the packing box body 1, first, the second operation portion 23 is rotated, so that the tip 24A of the locking pin 24 is retracted and comes out of the insertion portion 26, and from the side surface 17C. Then, the locked state of the rear standing state of the load receiving platform 17 is released. When the load receiving platform 17 is tilted backward with the horizontal axis 20 as the rotation center, the load receiving platform 17 is held in a horizontal state by a stopper (not shown). Next, by operating the first operating portion 9, the engagement between the cam 11 and the cam latch 14 is released, the locked state is released, and the open / close door 5 is opened.

  At this time, the opening / closing door 5 is rotated via the hinge fitting 6, and the opening / closing of the opening / closing door 5 on one side has an opening degree of approximately 90 degrees from the closed state to the back side. After that (see the solid line in FIG. 2), the opening until it turns 90 degrees and faces right next to the opening 2 is about 180 degrees, and further turned 90 degrees, so that the opening door 5 on one side is the side plate 7 on one side. The opening / closing door 5 rotates to an opening of approximately 270 degrees (see the one-dot chain line in FIG. 2), and in this state, the opening / closing door 5 is temporarily fixed by the door stopper 32 so as not to close. In such rotation of the opening / closing door 5, in the lock receiving member 16, the front end 16 </ b> B of the lock receiving member 16 is disposed rearward by the urging means 29. Further, the opening / closing door 5 on one side is rotated, and the contact member 15 provided on the surface of the opening / closing door 5, that is, the rear surface, comes into contact with the receiving member 16 for locking. Further, when the open / close door 5 rotates about the first hinge bracket 6, the contact member 15 presses the lock receiving member 16, so that the lock receiving member 16 rotates the rotation center shaft 27. The lock receiving member 16 is rotated to the outside as a center, and is rotated so as to follow the rotation of the door 5 against the biasing means 29. Further, even when the open / close door 5 is rotating, the lock receiving member 16 is rotated so as to follow the rotation of the open / close door 5 against the biasing means 29. In this manner, the door 5 is temporarily fixed by engaging the door stopper 32 with the door 5 while the door 5 is opened. The open / close door 5 on the other side is similarly opened.

  Then, the cargo in the cargo box body 1 is carried out to the upper surface of the load receiving platform 17 which is at the same height as the floor 12 and is provided in a horizontal state. At this time, since the end surface 25B on the opening 2 side of the lock receiving holding member 25 is retracted rearward from the base surface 17D or is formed in the same plane, the load placed on the base surface 17D is loaded with the end surface 25B. You won't be hit by anything, and you won't hurt your luggage. Next, by operating a lifting switch (not shown) of the load receiving platform 17 and operating the hydraulic cylinder device, the slider 18 and eventually the load receiving platform 17 are lowered to a predetermined height or grounded, and The baggage is taken in and out of the load receiving platform 17.

  On the other hand, after loading / unloading, the opening 2 is first closed by the pair of left and right doors 5. At the time of closing, the opening degree of the side door 5 is about 180 degrees from the opening degree of about 270 degrees, and the opening degree of the opening door 5 is about 90 degrees (see the solid line in FIG. 2). The door 5 is closed after being closed. At this time, the door 5 rotates until the door 5 is closed. However, in the lock receiving member 16, the pressing force applied to the lock receiving member 16 by the door 5 is weakened. As a result, the lock receiving member 16 is urged. 29 until the tip 16B is turned backward. The opening / closing door 5 on one side rotates away from the lock receiving member 16. When the lock receiving member 16 faces inward, it is locked by the stopper 31 to be blocked.

  Next, by operating the first operating portion 9, the operating rod 10, and consequently the cam 11, is rotated so that the cam 11 is engaged with the cam latch 14 and locked by the opening / closing door locking device 8. Then, by operating a lift switch (not shown) and operating the hydraulic cylinder device, the slider 18 and eventually the load receiving lift 17 are raised to the height of the floor surface 12 of the cargo box body 1 to move the horizontal shaft 20 When the load receiving platform 17 is raised about the rotation center to be in the rearward standing state, the lock receiving holding member 25 loosely fits the locking receiving member 16. In other words, the lock receiving member 16 is inserted into the lock receiving holding member 25 when the load receiving lift 17 is stood up.

  Next, by rotating the second operation portion 23, the locking pin 24 is moved horizontally, and the tip 24A is protruded from the side surface 17C of the load receiving platform 17 and inserted into the insertion portion 26. Then, the load receiving lift 17 is locked so that it does not fall backward.

  When the lock receiving member 16 is inserted into the lock receiving holding member 25 and the lock receiving holding member 25 is loosely fitted, the swing around the central horizontal shaft 20 is the opening of the front surface of the lock receiving holding member 25. The insertion portion 26 is prevented from coming out of the front end 24A of the locking pin 24 by being regulated by the front lateral width B of the portion. Further, since the rear width C of the rear opening is smaller than the front width B of the front opening of the lock receiving holding member 25 (B> C), the tip 16B of the locking receiving member 16 is inserted into that position so that the lock By swinging the receiving and holding member 25 as small as possible, the insertion portion 26 can be further prevented from coming out of the tip 24A of the locking pin 24.

  As described above, in the above-described embodiment, the cargo box body 1 having the opening 2 formed at the rear end portion is provided in the vehicle 1A, and the kannon type opening / closing door 5 can be rotated in the horizontal direction with respect to the opening 2. And a load receiving lift 17 that moves up and down in the vertical direction is provided at the rear of the opening 2, and the load receiving lift 17 is provided so as to be able to undulate backward and upward. A tip 24A of a locking pin 24 that responds to the second operating portion 23 of the lifting platform 17 is provided so as to be able to project and retract, and a locking receiving member 16 having an insertion portion 26 into which the pin 24 can be inserted can be horizontally rotated. The base end 16A is provided on the side frame member 4 which is the side portion of the opening 2, and the lock receiving member 16 on which the lock receiving member 16 can be loosely fitted is provided on the side surface 17C. The lock pin 24 is connected to the lock receiving member 16 in a state where the load receiving lift 17 is stood upright. When the lock receiving member 16 is externally fitted to the lock receiving member 16, the lock receiving member 16 to which the lock pin 24 is connected can be held. Therefore, the lock pin 24 is used as the lock receiving member. It can be prevented from coming off from 16, and the locked state can be ensured. Further, since the lock receiving member 16 can be rotated horizontally, the lock receiving member 16 can also be rotated in response to the opening / closing rotation of the opening / closing door 5. The door 5 can be opened and closed without being obstructed.

  In the embodiment, the lock receiving member 16 is always urged rearward by the urging means 29. Therefore, when the load receiving lift 17 is stood upright, the distal end 24A of the lock pin 24 is inserted into the insertion portion 26. When the door 5 is closed, the lock receiving member 16 automatically faces backward, and as a result, by operating the operation unit without positioning between the two, The locking pin 24 can be inserted into the insertion portion 26.

  Further, by providing the locking pin 24 and the lock receiving holding member 25 on the side surface 17C of the load receiving platform 17, the locking pin 24 and the lock receiving holding member 25 are provided on the upper surface of the load receiving lifting platform 17 that has become horizontal. There is no possibility that it will appear, and there is no fear that the foot on the load receiving platform 17 or the load on the load receiving platform 17 will be caught.

  In addition, since the rear width C of the rear opening is made narrower than the front width B of the front opening of the lock receiving holding member 25, the tip 16B of the lock receiving member 16 can be used when the load receiving lift 17 is placed in the rear-standing state. Accordingly, the rockable width of the tip 16B of the lock receiving member 16 is narrowed. For example, the slider 18 provided on the load receiving lift 17 is of a suspended structure. Even if the posture of the vehicle 1A and thus the packing box main body 1 is lowered to the right or to the left, a stable state is secured and the tip of the locking pin 24 is pulled out from the insertion portion 26. The locked state can be reliably maintained.

  Further, in the above-described embodiment, the locking pins 24 that respond to the second operating portion 23 that is one locking operating portion are provided on the side surfaces 17C and 17C on both sides of the load receiving platform 17 so as to be able to protrude and retract, respectively. The receiving member 16 is provided on both side portions (side frame members 4, 4) of the opening 2, and the lock receiving holding members 25 are provided on the side surfaces 17 C, 17 C on both sides of the load receiving lift 17 so that one second It is possible to engage / disengage with the lock receiving members provided on the side portions on both sides of the opening portion 2 by operating the operating portion 23 in one operation. Further, since the end surface 25B on the opening 2 side of the lock receiver holding member 25 is retracted rearward from the base surface 17D or is formed in the same plane, the load placed on the base surface 17D is transferred to the lock receiver holding member. 25 will not hurt you.

  As described above, the cargo box of the vehicle according to the present invention can be applied to various uses. For example, the lock operation unit may be electrically operated.

DESCRIPTION OF SYMBOLS 1 Packing box main body 1A Vehicle 2 Opening part 4 Side frame member 5 Opening and closing door
16 Lock receiving member
16A base
17 Loading platform
17C side
17D surface
23 Second operation part (lock operation part)
24 Locking pin (locking part)
25 Lock receiving holding member
25B end face
26 Insertion section

Claims (3)

  An opening formed in a cargo box body provided in the vehicle, an opening / closing door that is pivotable in a horizontal direction with respect to the opening, and an opening / closing door that can be opened / closed vertically. A load receiving lift platform is provided, the load receiving lift platform is provided so as to be able to undulate outward and upward, the lock receiving lift platform is provided with a lock portion that responds to a locking operation portion of the load receiving lift platform, and the lock portion is A lock receiving member that can be locked is pivotally provided at the opening side, and a lock receiving holding member capable of fitting the locking receiving member to the load receiving lift is provided. Locking device for receiving platform.   An opening formed at a rear end portion in the vehicle longitudinal direction of a cargo box body provided in the vehicle; an opening / closing door provided to be openable and closable by rotating horizontally with respect to the opening; A load receiving platform that moves up and down in the vertical direction is disposed at the rear position. The load receiving platform is provided so as to be able to undulate backward and upward, and the side surface of the load receiving platform is responsive to a lock operation unit of the load receiving platform. A locking pin having an insertion portion into which the locking pin can be inserted, and a base end of which is provided at a side of the opening so as to be horizontally rotatable, and the locking receiving member The load receiving platform is provided with an urging means for urging the front end of the fixing receiving portion backward, and a lock receiving holding member capable of loosely fitting the locking receiving member on the side surface. Locking device.   A lock pin that responds to one lock operation portion is provided on both side surfaces of the load receiving platform so as to be able to appear and retract, and the lock receiving members are provided on both side portions of the opening, respectively. 3. The lock receiving and holding members are provided on both side surfaces of the base, respectively, and these lock receiving and holding members are provided in a retracted position or the same planar position from the base surface of the load receiving lift. Locking device for the load receiving platform.

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