JP2009280166A - Vehicle loading and unloading device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the loading amount of cargoes by lowering a loading surface of a conveyor loaded with cargoes in a vehicle loading and unloading device equipped on a cargo bed of a truck or the like and used for moving the loaded cargoes on the cargo bed. <P>SOLUTION: A conveyor 1 is installed, which moves cargoes on a floor surface Ba of a cargo bed B loaded with cargoes in the longitudinal direction of the cargo bed B. The conveyor 1 is connected to a moving chain 4 which is formed in a sheet shape, connected to a roller 2 installed behind the cargo bed B in a winding/unwinding manner with its delivering fore end being movably arranged in the longitudinal direction of the cargo bed B. A driving unit 5 for driving the roller 2 and the moving chain 4 has a drive transmitting mechanism for executing the automatic change which is communized to drive the roller 2 when winding the conveyor 1 and drive the moving chain 4 when unwinding the conveyor 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention belongs to a technical field related to a vehicle loading / unloading device used for movement of cargo loaded on a loading platform such as a truck.

  In recent years, vehicles for cargo transportation such as trucks have been equipped with a vehicle loading / unloading device in which a conveyor is installed on the floor of a loading platform on which cargo is loaded. This vehicle loading / unloading device enables the cargo loaded and loaded on the rear side of the loading platform to be moved to the front side of the loading platform by driving the conveyor, and loaded on the front side of the loading platform when unloading. It is possible to reduce the load handling work of workers on the loading platform by allowing the cargo to be moved to the rear side of the loading platform. In particular, this vehicular cargo handling device is useful in a van-type cargo transportation vehicle in which the space on the loading platform is surrounded and restricted by side panels and top panels.

  In this vehicular cargo handling apparatus, since the conveyor must be driven in two directions that are the front and rear directions of the loading platform, there is a problem that the driving mechanism of the conveyor is enlarged. Therefore, in order to facilitate the installation of vehicles with restrictions on the mounting weight and the mounting space, there is a demand for the development of a vehicle handling device that can avoid an increase in the size of the conveyor drive mechanism.

2. Description of the Related Art Conventionally, as a vehicular cargo handling apparatus aimed at avoiding an increase in the size of a conveyor drive mechanism, for example, the one described in Patent Document 1 below is known.
This Patent Document 1 discloses a vehicle handling apparatus in which a conveyor that is installed on a floor surface of a cargo bed on which cargo is loaded is moved in an endless manner in the front-back direction of the cargo bed and is disposed in an endless manner. Is described.

The vehicle handling apparatus according to Patent Document 1 switches the conveyor drive direction by electrical switching of the conveyor drive mechanism or the like (for example, switching between the forward and reverse rotation directions of the drive motor), and loads the cargo in the longitudinal direction of the loading platform. By making it possible to move in any of these directions, an increase in the size of the drive mechanism of the conveyor is avoided. That is, as the drive mechanism of the conveyor, the forward movement and the backward movement are shared to avoid an increase in size.

JP 2000-16142 A

  In the vehicle handling apparatus according to Patent Document 1, the conveyor is passed in an endless manner, and a space for accommodating the two-stage arrangement structure of the conveyor must be secured on almost the entire surface of the floor of the loading platform. However, there is a problem that the loading surface of the conveyor on which the cargo is loaded becomes high and the cargo loading amount decreases.

  The present invention has been made in view of such problems, and provides a vehicle handling apparatus capable of increasing the cargo loading amount by lowering the loading surface of the conveyor on which the cargo is loaded. Let it be an issue.

  In order to solve the above-described problem, the vehicle handling apparatus according to the present invention employs means described in each of the claims.

  That is, according to claim 1, in the vehicle loading / unloading device in which the conveyor for moving the cargo in the front-rear direction of the loading platform is installed on the floor surface of the loading platform on which the cargo is loaded, the conveyor is formed in a sheet shape on the rear side of the loading platform. It is connected to the installed roller so that it can be wound and fed out, and the leading end is connected to a moving chain that can be moved in the front-rear direction of the loading platform, and the drive unit that drives the roller and moving chain is shared. A drive transmission mechanism for automatically switching between driving rollers when winding the conveyor and driving the moving chain when feeding the conveyor is provided.

  In this means, a sheet-like conveyor is wound around a roller by a take-up movement chain, thereby avoiding a two-stage arrangement structure of the conveyor, and a drive transmission in which the roller and the movement chain drive unit are automatically switched. By sharing the mechanism through the mechanism, the drive unit and the drive transmission mechanism can be installed using the recesses on the floor surface of the cargo bed.

  According to a second aspect of the present invention, in the vehicle loading / unloading apparatus according to the first aspect, the drive transmission mechanism receives a driving force to rotate and the driven disk is joined to both end faces of the driving disk and rotated on the same axis as the driving disk. And a one-way clutch that is provided between the drive disk and the driven disk and that rotates following the driven disk in one direction and does not rotate the driven disk in the other direction. Is connected to a roller, the other driven disk is connected to a moving chain, and the one-way clutch is characterized in that the direction in which rotation is followed on both driven disks is opposite.

  In this means, the drive transmission mechanism is formed in a disk shape in which the one-way clutch is provided between the drive disk and the driven disk, thereby providing compactness.

  According to a third aspect of the present invention, in the vehicle loading apparatus according to the second aspect, the one-way clutch of the drive transmission mechanism is circular in the circumferential direction with a depth inclined in the axial direction on the contact surface of the driven disk with the drive disk. It is characterized by comprising an engagement groove extending in an arc shape and an engagement body that is selectively housed in and out of the engagement groove accommodated in the driven disk and engaged and disengaged.

  In this means, the one-way clutch of the drive transmission mechanism is composed of an engagement groove provided on the contact surface of the driven disk with the drive disk and an engagement body accommodated in the drive disk.

  According to a fourth aspect of the present invention, in the vehicular cargo handling apparatus according to any one of the first to third aspects, the conveyor is provided with a freight support that is in contact with a side surface of the freight loaded on the leading end, and the freight support. It is connected with the chain for movement through.

  In this means, the conveyor and the moving chain are connected via the cargo support.

  The vehicle cargo handling device according to the present invention avoids a two-stage arrangement structure of a conveyor by feeding a sheet-like conveyor around a roller by a winding movement chain, and automatically drives a roller and a moving chain drive unit. Since the drive unit and the drive transmission mechanism can be installed using the recesses on the floor of the loading platform, etc., by using a common drive transmission mechanism, the loading of the conveyor on which the cargo is loaded There is an effect that the surface can be lowered and the cargo load can be increased.

  Further, as claimed in claim 2, since the drive transmission mechanism is formed in a disk shape in which the one-way clutch is provided between the driving disk and the driven disk, the compactness is provided, so that the installation space on the floor of the loading platform can be secured. There is an effect that becomes easy.

  Further, since the one-way clutch of the drive transmission mechanism is composed of an engagement groove provided on the contact surface of the driven disk with the drive disk and an engagement body accommodated in the drive disk, the structure of the drive transmission mechanism is complicated. This is advantageous in that it is easy to manufacture at low cost.

  Further, as claimed in claim 4, since the conveyor and the moving chain are connected via the cargo support, the feeding force of the moving chain applied to the conveyor can be distributed and equalized by the cargo support. There is an effect that can be made smooth.

  The best mode for carrying out a vehicular cargo handling apparatus according to the present invention will be described below with reference to the drawings.

  In this form, what is installed in a van type loading platform B of a truck T is shown.

  In this embodiment, as shown in FIG. 1, a conveyor 1, a roller 2, a cargo support 3, a moving chain 4, a drive unit 5, and a drive transmission mechanism 6 are configured as main parts.

  As shown in FIGS. 1 and 2, the conveyor 1 is formed in a sheet shape with a lightweight and tough belt (for example, polyamide laminated as a core layer), and the front and rear direction and the width direction (front and rear direction) of the loading platform B. The arrangement surface which becomes the cargo loading surface can be developed on the floor surface Ba of the loading platform B. As shown in FIG. 2, the floor of the conveyor 1 is a floor that supports the load of cargo loaded in the arrangement direction of the conveyor 1 (front and rear direction of the floor surface Ba of the loading platform B) via the conveyor 1. A frame 7 is provided. If necessary, the floor frame 7 is provided with a solid lubricant such as wax that comes into contact with the conveyor 1 in order to make the conveyor 1 move smoothly.

  As shown in FIGS. 1 and 2, the roller 2 is configured such that its axis is set in the width direction of the loading platform B and is rotatably installed at the rear end of the floor surface Ba of the loading platform B. The roller main body 21 that winds and feeds the conveyer 1 is fixed, and the roller shaft 22 is fixed to the roller main body 2. A drive transmission sprocket 8 is fixed to the roller shaft 22. A guide roller 9 for guiding the conveyor 1 toward the arrangement surface is installed on the front side of the loading platform B near the roller 2.

  As shown in FIG. 1, the cargo support body 3 prevents the collapse of cargo loaded with a backrest function. The cargo support body 3 is formed in a torii-shaped frame and is fed forward of the conveyor 1 (winding end). It stands up to the height of the top of the loading platform B up to the top panel Bb. The cargo support 3 and the leading end of the conveyor 1 are fixed via plate-shaped reinforcing metal fittings extending in the width direction of the loading platform B so that the conveyor 1 does not lean, twist or the like. For example, the side surface of the cargo support 3 travels inside a U-shaped traveling rail disposed along the side panel Bc of the loading platform B so that the smoothness of the movement of the cargo support 3 is ensured. A travel roller mounting plate on which the travel roller is rotatably supported is fixed.

  As shown in FIGS. 1 and 2, the moving chain 4 is stretched endlessly on sprockets 10 and 20 disposed on the front side and the rear side of the floor surface Ba of the loading platform B to move in the longitudinal direction of the loading platform B. The two are arranged in parallel in the width direction of the loading platform 2. The sprockets 10 and 20 correspond to the two moving chains 4 on the rotary shafts 30 and 40 arranged with the axis lines set in the width direction of the loading platform B on the front side and the rear side of the floor surface Ba of the loading platform B. Thus, a pair with an interval is supported. An auxiliary sprocket 50 that narrows the interval between the endless reciprocating lines of the moving chain 4 is installed on the rear side of the loading platform B near the sprockets 10 and 20. A drive transmission sprocket 60 is fixed to the rotary shaft 30 on the rear side of the loading platform B. One portion of the moving chain 4 and the cargo support 3 (the leading end of the conveyor 1) are fixed by a fixing bracket 70.

  As shown in FIGS. 1 and 2, the drive unit 5 includes a drive motor 51 installed at the end on the rear side of the floor surface Ba of the loading platform B, and an axis set in the width direction of the loading platform B. And a drive shaft 52 connected to the drive shaft 52. The drive motor 51 can be switched between forward and reverse rotation directions by a control circuit.

  The drive transmission mechanism 6 includes a drive disk 61, driven disks 62 and 63, a one-way clutch 64, and a lock mechanism 65, as shown in detail in FIG.

  The drive disk 61 of the drive transmission mechanism 6 has an insertion hole 611 through which the drive shaft 52 of the drive unit 5 is inserted, and a fitting hole 612 into which a fixing ring 80 that fixes the drive shaft 52 of the drive unit 5 is fitted. It is formed in a disk shape that communicates with the central portion and is opened coaxially. Six one-way clutch housing holes 613 in which a part of the one-way clutch 64 is housed are passed through the both end surfaces in a radial arrangement. On the peripheral surface, six lock mechanism accommodation holes 614 in which the lock mechanism 65 is accommodated are opened so as to reach the one-way clutch accommodation hole 613 in a radial arrangement.

  The driven disks 62 and 63 of the drive transmission mechanism 6 have insertion holes 621 and 631 through which the drive shaft 52 of the drive unit 5 is inserted so as to rotate on the same axis as the drive disk 61 and the drive shaft 52 of the drive unit 5. The fitting holes 622 and 632 into which the bearings 90 to be supported are fitted are formed in a disk shape that communicates with the central portion and is opened coaxially. One end surface is in contact with the end surface of the drive disc 61. Drive transmission sprockets 300 and 400 on which the drive transmission chains 100 and 200 are hung are attached to the other end surface (part of the peripheral surface). As shown in FIG. 2, the drive transmission chain 100 hung on one drive transmission sprocket 300 is attached to the rotary shaft 30 on which the sprocket 10 on the rear side of the loading platform B on which the movement chain 4 is suspended is supported. It is suspended on a fixed drive transmission sprocket 60. As shown in FIG. 2, the drive transmission chain 200 hung on the other drive transmission sprocket 400 is suspended on the drive transmission sprocket 8 fixed to the roller shaft 22 of the roller 2. In addition, the above-mentioned one drive transmission chain 100 is deformed in the shape of the transfer to the drive transmission sprocket 60 so as to avoid the conveyor 1 wound around the roller 2 by the tension sprocket 500.

  The one-way clutch 64 of the drive transmission mechanism 6 includes an engagement groove 641 and an engagement body 642. The engagement grooves 641 have a depth inclined in the axial direction at one end surface which is a contact surface of the driven disks 62 and 63 with the drive disk 61, and extend in an arc shape in the circumferential direction, and six of them are radial. It is carved with the arrangement of. The engaging groove 641 is provided with a flat portion 641b having a constant depth at the deepest portion of the inclined surface 641a, and the shallowest portion of the inclined surface 641a reaches the end surfaces of the driven disks 62 and 63. As is clear from FIGS. 5 and 12, the inclined directions of the inclined surfaces 641 a of the engaging grooves 641 of the driven disks 62 and 63 are set in opposite directions in the driven disks 62 and 63. The engaging body 642 has an outer diameter that substantially matches the diameter of the one-way clutch housing hole 613 of the driving disk 61 and an axial length that substantially matches the sum of the axial length of the driving disk 61 and the depth of the flat portion 641 b of the engaging groove 641. It is formed in a pin shape. The end surface of the engaging body 642 is formed as a hemispherical round head 642a. On the peripheral surface of the engaging body 642, two annular grooves 642b having a semicircular cross section are provided with a gap therebetween. The engaging body 642 is housed in the one-way clutch housing hole 613 of the driving disk 61 and protrudes and retracts with respect to the engaging groove 641, and the annular groove 642 b is formed in the locking mechanism housing hole 614 of the driving disk 61 at the limit position of the projecting and retracting. Face to face.

  The lock mechanism 65 of the drive transmission mechanism 6 includes a ball 651, a coil spring 652, and a set screw 653. The ball 651 is formed of a spherical body that protrudes from and enters the lock mechanism accommodation hole 614 of the drive disk 61 and engages with the annular groove 642 b of the engagement body 642 of the one-way clutch 64. The coil spring 652 is housed in the lock mechanism housing hole 614 of the drive disk 61 and presses the ball 651 toward the engaging body 642 of the one-way clutch 64. The set screw 653 is screwed into the lock mechanism accommodation hole 614 of the drive disk 61 near the peripheral surface of the drive disk 61 and receives the reaction force of the spring force of the coil spring 652.

  According to this embodiment, the conveyor 1 does not have a two-stage arrangement structure. Therefore, by installing the roller 2, the drive mechanism 5, and the drive transmission mechanism 6 using the concave portion of the floor surface Ba of the loading platform B, the cargo is The arrangement | positioning surface used as the loading surface of the conveyor 1 loaded can be made low. Therefore, it is possible to effectively use the volume of the loading platform B for loading cargo and to secure a large loading capacity. Further, since the installation space is reduced by avoiding the two-stage arrangement structure of the conveyor 1, the fixed loading platform B of the truck T that has already been used can be easily retrofitted. Note that the fact that the drive unit 5 is composed of one unit also contributes to a reduction in the mounting space. In addition, the drive transmission mechanism 6 attached to the drive unit 5 is formed in a disk shape in which the one-way clutch 64 is provided between the drive disk 61 and the driven disks 62 and 63, so that compactness is provided. It is useful for the installation using the concave portion of the floor surface Ba of the floor. In the drive transmission mechanism 6, the one-way clutch 64 is provided with an engagement groove 641 provided on one end surface which is a contact surface of the driven disks 62 and 63 with the drive disk 61, and an engagement body 642 accommodated in the drive disk 61. Therefore, it is possible to manufacture at low cost and easily without complicating the structure. Further, the distance between the endless reciprocating lines of the moving chain 4 being reduced by the auxiliary sprocket 50 also contributes to lowering the arrangement surface that is the loading surface of the conveyor 1 on which cargo is loaded.

  In order to use this form, the conveyor 1 is driven from the roller 2 by driving the drive unit 5 to move the cargo loaded and loaded on the rear side of the loading platform B to the front side of the loading platform B. Is wound around the roller 2 by driving the drive unit 5 in the reverse direction, so that the cargo loaded on the front side of the loading platform B is moved to the rear side of the loading platform B at the time of unloading.

  When the drive motor 51 of the drive unit 5 is rotated in the forward direction, the drive shaft 52 is also rotationally driven in the forward direction. In the drive transmission mechanism 6, the drive disk 61 is rotated in the forward direction integrally with the drive shaft 52 of the drive unit 5 through the fixing ring 80. At this time, as shown in FIGS. 3, 6, 7, and 12, the engagement body 642 of the one-way clutch 64 of the drive transmission mechanism 6 slides on the inclined surface 641 b of the engagement groove 641 on one driven disk 62. The engaging groove 641 reaches the flat portion 641b and is engaged with the engaging groove 641. That is, the one-way clutch 64 of the drive transmission mechanism 6 is engaged and connected between the drive disk 61 and one driven disk 62, and the one driven disk 62 follows the drive disk 61 in the forward direction. Will be rotated. At this time, since the one-way clutch 64 of the drive transmission mechanism 6 is released from the drive disk 61 and the other driven disk 63, the other driven disk 63 is driven to rotate. Absent. Since the engagement body 642 of the one-way clutch 64 is a pin that is expected to smoothly slide, the engagement and disengagement of the one-way clutch 64 are smoothly operated.

  The rotational drive in the forward direction of one driven disk 62 of the drive transmission mechanism 6 becomes the rotational drive of the drive transmission sprocket 300 attached to the driven disk 62. Then, the upper side of the endless reciprocating line of the moving chain 4 is moved from the rear side to the front side of the loading platform B through the drive transmission chain 100, the drive transmission sprocket 60, the rotary shaft 30, and the sprocket 10. become.

  When the drive transmission mechanism 6 rotates in the forward direction following the drive disk 61 of one driven disk 62, the ball 651 of the lock mechanism 65 is elastically engaged with the annular groove 642b of the engagement body 642 of the one-way clutch 64. Yes. Therefore, even if rotational stress and ambient vibration are conducted, the engagement connection of the one-way clutch 64 of the drive transmission mechanism 6 is not unexpectedly released.

  As a result, the cargo support 3 and the leading end of the conveyor 1 are reliably moved from the rear side to the front side of the loading platform B, and the conveyor 1 is unloaded and the loaded cargo is moved and deployed on the arrangement surface. It will be.

  At this time, as the conveyor 1 is fed, the roller 2 rotates to rotate the drive transmission sprocket 8 and the drive transmission chain 200, so that the drive transmission sprocket 400 and the other driven disk 63 of the drive transmission mechanism 6 are connected. It will be rotated in the opposite direction. However, since the one-way clutch 64 of the drive transmission mechanism 6 is released from the drive disk 61 and the other driven disk 63, the rotational drive in the positive direction of the one driven disk 62 has an influence. I do not receive it.

  When the drive motor 51 of the drive unit 5 is rotationally driven in the reverse direction, the drive shaft 52 is also rotationally driven in the reverse direction. In the drive transmission mechanism 6, the drive disk 61 is rotated integrally with the drive shaft 52 of the drive unit 5 in the reverse direction via the fixing ring 80. At this time, as shown in FIGS. 8, 9, and 12, the engagement connection between the drive disk 61 of the one-way clutch 64 of the drive transmission mechanism 6 and the one driven disk 62 is released. Since the flat portion 641b is provided in the engagement groove 641 of the one-way clutch 64 of the drive transmission mechanism 6 to ensure play between the engagement body 642, the engagement groove 641 of the one-way clutch 64 and the engagement body 642 Engagement mechanical deadlock is avoided and smooth disengagement is guaranteed.

  4, 10, 11, and 12, the engagement body 642 of the one-way clutch 64 of the drive transmission mechanism 6 slides on the inclined surface 641 b of the engagement groove 641 and is provided on the other driven disk 63. The engagement groove 641 reaches the flat portion 641b and is engaged with the engagement groove 641. That is, the one-way clutch 64 of the drive transmission mechanism 6 is engaged and connected between the drive disk 61 and the other driven disk 63, and the other driven disk 63 follows the drive disk 61 in the reverse direction. Will be rotated. At this time, since the one-way clutch 64 of the drive transmission mechanism 6 is released from the drive disk 61 and the one driven disk 62, the one driven disk 62 is driven to rotate. Absent. Since the engagement body 642 of the one-way clutch 64 is a pin that is expected to smoothly slide, the engagement and disengagement of the one-way clutch 64 are smoothly operated.

  The rotational drive in the reverse direction of the other driven disk 63 of the drive transmission mechanism 6 becomes the rotational drive of the drive transmission sprocket 400 attached to the driven disk 63. Then, the roller 2 is rotated in the winding direction of the conveyor 1 via the drive transmission chain 200 and the drive transmission sprocket 8.

  When the drive transmission mechanism 6 rotates in the reverse direction following the drive disk 61 of the other driven disk 63, the ball 651 of the lock mechanism 65 is elastically engaged with the annular groove 642b of the engagement body 642 of the one-way clutch 64. Yes. Therefore, even if rotational stress and ambient vibration are conducted, the engagement connection of the one-way clutch 64 of the drive transmission mechanism 6 is not unexpectedly released.

  As a result, the conveyor 1 is wound around the roller main body 21 of the roller 2, the cargo support 3 and the feeding tip of the conveyor 1 are moved from the front side to the rear side of the loading platform B, and the cargo loaded with the conveyor 1 is moved. It is moved to the rear side of the loading platform B.

  At this time, as the conveyor 1 is wound up, the moving chain 4 pulled by the cargo support 3 moves in the opposite direction to the above, and the sprocket 10, the rotating shaft 30, the drive transmission sprocket 60, and the drive transmission. The chain 100 is rotated to rotate the drive transmission sprocket 300 and one driven disk 62 of the drive transmission mechanism 6 in the forward direction. However, since the one-way clutch 64 of the drive transmission mechanism 6 is released from the drive disk 61 and one driven disk 62, the rotational drive in the reverse direction of the other driven disk 63 has an effect. I do not receive it.

  As described above, the roller 2 and the drive unit 5 that drives the moving chain 4 are made common, and the drive transmission mechanism 6 automatically switches the drive.

  As described above, it is also possible to add a mechanism for actively moving and driving the cargo support 3 in cooperation with each part that moves the moving chain 4 in addition to the illustrated form.

  The vehicle loading / unloading apparatus according to the present invention can be widely applied to vehicles for cargo transportation other than the truck T.

1 is a simplified perspective view of the best mode for carrying out a vehicular cargo handling apparatus according to the present invention. It is the side view to which the principal part of FIG. 1 was expanded. FIG. 3 is an enlarged perspective view of a main part of FIG. 2. FIG. 3 is another operational state diagram of FIG. 2. FIG. 2 is an enlarged perspective view of an essential part of FIG. 1 in an exploded state. FIG. 4 is an enlarged longitudinal sectional view of FIG. 3. It is sectional drawing to which the principal part of FIG. 6 was expanded. FIG. 5 is an enlarged longitudinal sectional view in the middle of switching to FIGS. 3 to 4. It is sectional drawing to which the principal part of FIG. 8 was expanded. FIG. 5 is an enlarged longitudinal sectional view of FIG. 4. It is sectional drawing to which the principal part of FIG. 10 was expanded. FIG. 12 is a simplified diagram developed on a plane showing an operation process between FIGS. 7, 9, and 11.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyor 2 Roller 3 Cargo support body 4 Movement chain 5 Drive part 6 Drive transmission mechanism 61 Drive disk 62,63 Driven disk 64 One-way clutch 641 Engagement groove 642 Engagement body T track (vehicle)
B loading platform Ba floor

Claims (4)

  In a vehicle loading / unloading device in which a conveyor for moving cargo in the front-rear direction of the loading platform is installed on the floor of the loading platform on which the cargo is loaded, the conveyor is formed into a sheet and wound around a roller installed on the rear side of the loading platform , Connected so that it can be fed out, and the leading end is connected to a moving chain arranged so as to be movable in the front-rear direction of the loading platform. The roller and the driving unit for driving the moving chain are made common so that the conveyor can be wound up. A vehicle loading / unloading device is provided with a drive transmission mechanism that automatically switches to drive a roller at the time of driving a conveyor chain at the time of feeding a conveyor.   The vehicle load handling apparatus according to claim 1, wherein the drive transmission mechanism includes a drive disk that is rotated by receiving a driving force, a driven disk that is joined to both end faces of the drive disk and that is rotated on the same axis as the drive disk, the drive disk, and the driven disk. Provided with a one-way clutch that rotates the driven disk following the rotation of the driving disk in one direction and does not rotate the driven disk following the rotation in the other direction, one driven disk connected to the roller, and the other The vehicle handling apparatus is characterized in that the driven disk is connected to a moving chain, and the one-way clutch is opposite in the direction in which rotation is followed on both driven disks.   3. The vehicular cargo handling apparatus according to claim 2, wherein the one-way clutch of the drive transmission mechanism has a depth inclined in the axial direction on the contact surface of the driven disk to the drive disk and extends in an arc shape in the circumferential direction. A vehicle loading / unloading apparatus comprising: an engaging body that selectively engages and disengages by engaging and disengaging with respect to an engaging groove that is accommodated in the driven disk and provided in the driven disk.   4. The vehicular cargo handling apparatus according to claim 1, wherein the conveyor is provided with a cargo support that comes into contact with a side surface of the cargo loaded on the leading end and is moved to the moving chain via the cargo support. A cargo handling apparatus for a vehicle characterized by being connected.

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