JP2003095006A - Cargo gear for truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the cargo gear of a truck equipped with a freely elevatable elevating floor at the rear end part of a deck, which is capable of stably loading/unloading a heavy cargo such as a heavy machine. SOLUTION: An opening 7 formed at the rear end part of the deck 6 while right and left side parts 6b and 6a are left is formed with the freely elevatable elevating floor 9, and the right and left side parts 6b and 6a are formed with a plurality of jacks 41 capable of supporting the rear end part of the deck. When a cargo is loaded/unloaded, the rear end of the deck is supported by the jacks 41 so that a heavy cargo such as a heavy machine can be loaded/ unloaded stably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo handling apparatus for a freight vehicle, and more particularly, to loading a cargo onto a cargo bed via an elevator floor that can be raised and lowered with respect to the cargo bed, or to stabilize heavy cargo such as heavy equipment. The present invention relates to a cargo handling device for a lorry that can be installed as a vehicle.

[0002]

2. Description of the Related Art Conventionally, a cargo handling apparatus for a freight vehicle, in which a cargo bed having a plurality of subframes with floor boards attached thereto is provided on a vehicle body frame, and a load is loaded and unloaded from the rear end side of the cargo bed, said cargo bed rear portion Cargo of the type in which the cargo is mounted on the cargo bed by forming an opening in the cargo bed with the left and right side portions left, and lifting the cargo through an elevator floor that can be elevated between the opening and the ground. A cargo handling device for an automobile is known (for example, JP-A-8-40134 (conventional example 1),
Japanese Utility Model Application Laid-Open No. 5-1590 (conventional example 2)).

[0003]

However, in the above-mentioned conventional apparatus, the load is supported when the lifting floor and the load loaded on the lifting floor are suspended by the rear end portion of the vehicle body frame via the vertically movable columns. Was done by. Therefore, this is applicable when the load of the load loaded on the lifting floor is small, but when loading a load with a large load (for example, heavy equipment) on the lifting floor, the rear wheels of the freight vehicle (or the conventional example 1). The hydraulic moment near the rear wheel is used as a fulcrum, and the moment the rear end of the platform lowers acts, and the front side of the freight car floats up. Was difficult to apply. Also, in order to support the heavy loads, the left and right side parts (body frame and left and right outer sub-frames) of the rear part of the luggage carrier should be strengthened to make up for the lack of strength. In addition, there is a problem that the cost increases due to this.

In view of the above, the present invention, in the cargo handling apparatus of this type of vehicle, particularly strengthens the left and right side portions of the rear portion of the load carrier when the load is loaded on the load carrier by using the lifting floor. It is an object of the present invention to provide a cargo handling device for a freight vehicle capable of stably loading a heavy load without carrying out.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 is a plurality of sub-frames arranged on a vehicle body frame and a floor board attached on the sub-frames. A cargo handling device for a freight vehicle for forming a cargo bed by means of a cargo bed, and loading and unloading cargo from the rear end side of the cargo bed, wherein a floor opening is formed in a state where left and right side portions of the cargo bed are left at the rear end portion of the cargo bed The floor opening is mounted on the floor opening so that the floor can be moved up and down between the upper limit position that closes the floor opening and the ground, and a lifting drive device that drives the lifting floor is provided. A plurality of jacks for supporting the left and right side portions when loading a load on the floor are provided on the left and right side portions, respectively.

In the invention according to claim 1 configured as described above, since the fulcrum for supporting the luggage carrier by supporting the luggage carrier rear end portion with the jack is located at the rear end side, the rear wheel portion of the freight vehicle is centered. It is possible to prevent the generation of a downward moment of the cargo bed and the instability of the cargo due to this, and it is possible to stably load a heavy cargo such as a heavy machine without using a crane or a forklift.

The invention according to claim 2 is characterized in that the lifting drive device suspends four corners of the lifting floor to horizontally lift the lifting floor.

In the invention according to claim 2 thus constructed, since the four corners of the lifting floor are moved up and down with equal force and constant velocity, the tilting operation of the lifting floor can be prevented when the lifting floor loaded with the load is lifted. Therefore, a heavy load such as a heavy machine can be stably loaded without tilting.

In the invention according to claim 3, the left and right side portions have a plurality of elevating guides for guiding the left and right sides of the elevating floor when elevating the elevating floor. Is an outer cylinder fixed to the left and right side portions and is inserted into and retractable from the outer cylinder so as to advance and descend from the outer cylinder when the elevating floor descends, and into the outer cylinder when ascending the elevating floor. An inner cylinder to be housed is provided.

In the invention according to claim 3 configured as above, since both sides of the lifting floor are guided by a plurality of lifting guides, when lifting a lifting floor carrying a heavy load such as a heavy machine. In addition, it is possible to prevent the swaying of the raised / lowered floor and the lateral displacement of the load due to the horizontal swaying, and the loading and unloading work of the load can be stably performed.

Further, the invention according to claim 4 is characterized in that the elevating floor comprises an extension floor which can be taken in and out from a rear end portion of the elevating floor.

In the invention according to claim 4 configured as described above, when the load to be loaded on the lifting floor is a long object, or when the rear end of the loading platform and the load on the platform are separated from each other, When there is an obstacle such as a groove between the cargo and the cargo, the extension floor is pulled out from the lifting floor to expand the floor to be lifted, so that the cargo can be loaded and unloaded stably.

Further, in the invention according to a fifth aspect, a base portion of the extension floor is pivotally attached to a rear portion of the extension floor, and a free end thereof is guided by a guide column which is erected on the loading platform. According to movement of the extension floor, the top panel has a foldable position that covers the upper surface of the extension floor and the extension floor is housed in the elevating floor when the extension floor is pulled out. In this case, it is possible to move between the standing position and the standing position that closes the rear side of the loading platform.

In the invention according to claim 5 having such a structure, when the extension floor is pulled out from the elevating floor, the top plate inclines from the upright state to the fallen state in association with this, and the maximum extension floor The top plate covers the extension floor at the pulling-out position, and when the extension floor is stored, the top plate stands up in association with this and can also be used as a rear side plate that closes the rear portion of the loading platform. Further, by covering the extension floor with the top plate, the loading and unloading of the load consisting of a moving body having wheels, crawlers, casters and the like can be stably performed when the load is loaded on the lifting floor and the extension floor.

Further, in the invention according to claim 6, the extension floor has a road plate whose base is pivotally attached to a rear end portion of the extension floor, and the road plate is a load in which the elevating floor is lowered. Sometimes, the free end is in contact with the ground to form an inclined surface, and when the lifting floor rises and is at the floor opening, it hangs down.

In the invention according to claim 6 configured as described above, when the road plate is inclined with respect to the extended floor that has been pulled out, it is possible to guide a vehicle such as a load or a vehicle to the extended floor. In addition, when the extension floor is stored in the lifting floor and the road plate hangs down to the rear of the loading platform, this road plate can also be used as a rush prevention plate for the following vehicle.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of a cargo handling device provided in a freight vehicle according to the present invention, and FIGS. 2 to 4 show a cargo bed portion of the freight vehicle. In each figure,
A plurality of sub-frames 3 are integrally arranged in the front-rear direction and the lateral direction on a vehicle body frame 2 of a freight vehicle 1, and the sub-frame 3 and a floor plate 5 attached to the sub-frame 3 ( (See FIG. 3), the cargo bed 6 is formed on the vehicle body frame 2.

On the rear side of the luggage carrier 6, there is an opening 7 which is open rearward with the left and right side portions 6a, 6b (body frame 2 and left and right outer subframes 3) of the luggage carrier 6 left. It has been opened. The opening 7 is provided with an elevating floor 9 that can be moved up and down between the upper limit position that closes the opening 7 and the ground 34 as described later. As a result, the cargo bed 6 comprises a fork-shaped fixed floor 6c having an opening 7 and the lifting floor 9 described above.

In FIGS. 2 and 3, a lift cylinder 11 for raising and lowering the lifting floor 9 is provided in the lifting drive device 10 fixedly provided on the back side of the floor plate 5 in the fixed floor 6c. The lift cylinder 11 has a plunger 11a having a pair of sprockets 12 on the left and right of its free end.
13 are mounted respectively. The lifting drive device 10
A sprocket pair 15 is rotatably arranged on the front end side, and a drive sprocket pair 17 integrated with the interlocking shaft 16 is rotatably arranged on the rear end side.

As shown in FIG. 3, the sprocket pair 1
5 and the drive sprocket pair 17 located below the drive sprocket pair 17 are wound around the sprocket pair 13 via the guide sprocket 20 and the drive sprocket pair 17 on the right side thereof, and the ends thereof are connected to the drive sprocket pair 17. It is supported by a support member (not shown) so as to face the side.

The drive chain 19 has a sprocket pair 15 and a sprocket pair 12 on its left side.
The end portion is supported by a supporting member (not shown) so as to face the sprocket pair 15 side.

The lift cylinder 1 shown in FIG.
The sprocket pair 12 and 13 of No. 1 is at the position shown by the chain line A when the lifting floor 9 is at the upper limit position (original position) at the same height as the fixed floor 6c, and the lifting floor 9 is to be described later. When it descends, it is in the solid line position. That is, when the plunger 11a is retracted into the lift cylinder 11, the outside of the drive chain 19 and the drive sprocket pair 17 rotate clockwise in FIG. 3 so that the lifting floor 9 descends as will be described later. Has become.

Front end sprockets 21 for raising and lowering the front part of the lifting floor 9 are integrally formed at both ends of the interlocking shaft 16, and rear sprockets 22 are integrally formed outside thereof. Has been done. Front chain 2 wound around the front sprocket 21
One end of 3 is locked to the front part of the lifting floor 9 to support the front part of the lifting floor 9, and the other end side of this chain 23 is wound around the sprocket 21 for the front part with an appropriate length. Later fixed bed 6
It is stored in c by a member not shown so that it can be freely taken in and out. The support on the rear side of the lifting floor 9 will be described later.

The front and rear portions of the left and right side portions 6a, 6b are
An elevating guide 25 for the front part and a elevating guide 26 for the rear part, which guide the elevating floor 9 when elevating the elevating floor 9.
And are provided respectively. As an example of the elevating guide, the rear elevating guide 26 provided on the left side portion 6a will be described with reference to FIG.

In FIG. 5, a rectangular outer cylinder 27 having a downward opening is fixed to the rear part of the left side portion 6a, and a rectangular inner cylinder 29 is slidably (removably) housed therein. Has been done. A common slit 30 is provided on the lifting floor 9 side of the outer cylinder 27 and the inner cylinder 29.
The upper and lower parts of the inner cylinder 29 are closed by an upper plate 31 and a bottom plate 32, respectively.

In FIG. 5 (b), the base of the core member 33 is fixed to the rear side of the lifting floor 9, and the slit 30 is provided.
Through the thin neck that penetrates the
The core portion 33a is slidably accommodated in the inner cylinder 29.

In FIG. 2, the front sprocket 21 is used.
As described above, the front end portion of the lifting floor 9 is supported by the front chain 23 that is wound around the rear chain 35, but one end side of the rear chain 35 that is wound around the rear sprocket 22. Is wound around a sprocket 36 provided on the upper part of the rear elevating guide 26, further hangs down in the rear elevating guide 26, and penetrates a hole (not shown) formed in the upper plate 31. And is locked to the core portion 33a.

FIG. 5B shows a state in which the lifting floor 9 is in contact with the ground 34. When the lifting floor 9 is raised, only the core portion 33a and the lifting floor 9 are raised first, and the core portion 33a is in the middle.
When the upper plate 31 is lifted, the inner cylinder 29 also rises together, and at the upper limit position, the upper plate 31 collides with the stopper 37, so that the lifting floor 9 is stopped. When the lifting floor 9 descends, the inner cylinder 29 also descends along with the lowering of the core 33a and extends from the outer cylinder 27. Only 9 descends.

As a result, the rear end portion of the lifting floor 9 has the core member 3
It is supported by being able to move up and down and being prevented from rolling laterally via 3. The other end of the rear chain 35 is movably supported by a member (not shown) inside the left side portion 6a after the rear sprocket 22 is wound.

In FIG. 3, a lifting guide 25 for the front portion is provided.
Is the left side portion 6 as in the case of the rear lifting guide 26.
It has an outer cylinder 39 fixed to a and an inner cylinder 40 that is vertically inserted into the outer cylinder 39. Core member 33 shown in FIG.
A core member (not shown) similar to the above is provided on both sides of the front part of the lifting floor 9, and the core part is the lifting guide 25 for the front part.
It is stored so that it can be raised and lowered freely.

By thus guiding the lifting floor 9 by the four lifting guides 26 for the rear part and the lifting guide 25 for the front part, the lifting floor 9 can be lifted without rolling. . The interlocking shaft 16 rotated by the drive of the lift cylinder 11 interlocks the left and right sprocket wheels 21 and 36 to drive the same at a constant speed, so that the lifting floor 9 can be always lifted while maintaining the parallel state. Has become.

Next, the support of the rear end portions of the left and right side portions 6a and 6b will be described. The above-mentioned rear lifting guide 2
The jack 41 arranged in the vicinity of 6 includes a hollow outer cylinder 42 having an upper portion fixedly attached to the left side portion 6a, an inner cylinder 43 inserted in and out of the outer cylinder 42, and the outer cylinder 42.
It is provided with a hydraulic cylinder 45 and the like arranged inside.
The plunger 45 a of the hydraulic cylinder 45 has the inner cylinder 43.
Is integrally formed with the hydraulic cylinder 45 and the ground 34
It descends by hydraulic pressure until it contacts the ground. Hydraulic cylinder 4
5 operates the plunger 45a with pressure on the left side portion 6
That is, a, that is, a low pressure that does not lift the loading platform 6 is set.

Although the outer cylinder 27 of the elevating guide 26 and the outer cylinder 42 of the jack 41 are separately arranged as described above, they are closely attached to each other to form an integral structure. The box structure of the guide 26 and the jack 41 may be simplified.

The above-mentioned jack 41 on the left side portion 6a side and the similar jack 41 provided on the right side portion 6b side are each independently provided so that the ground 34 on which they are ground has irregularities so that the luggage carrier 6 can be supported uniformly. It can be operated. After both jacks 41 are grounded so that the loading platform 6 has a uniform height, a valve (not shown) attached to each hydraulic cylinder 45 closes a hydraulic circuit (not shown), so that the plunger 45a of the hydraulic cylinder 45 moves. The hydraulic cylinder 45 is prevented from naturally entering.

This jack 41 applies a load to the rear end of the luggage carrier 6 so that the load applied to the rear wheels 46 of the freight vehicle 1 and its axle does not become overloaded when a heavy load is loaded on the luggage carrier 6. It serves to load the ground 34 and position the fulcrum rearward. This jack 41 is installed in advance in an operating position before the elevator floor 9 is lowered (before operation), and after the elevator floor 9 is raised and locked by a locking device described later, the plunger 45a of the hydraulic cylinder 45 is moved to the hydraulic cylinder 4a.
It operates so as to shrink and store within 5.

Since the opening 7 is provided in the rear portion of the luggage carrier as described above, the strength of the left and right side portions 6a and 6b (the vehicle body frame 2 and the left and right outer subframes 3) of the luggage carrier may be reduced. If the left and right side portions 6a and 6b are made rigid to compensate for the reduction in the strength of the left and right side portions 6a and 6b, the weight of the vehicle increases and the cost increases accordingly. , 6b are supported by jacks 41, respectively, so that a heavy load can be loaded on the loading platform 5 without increasing the strength of the left and right side parts 6a, 6b.

Although the hydraulic cylinder 45 is exemplified as the drive source of the jack 41, the invention is not limited to this, and an electric motor can be used. Further, although the above-mentioned front elevation guide 25, rear elevation guide 26, jack 41, etc. have been described on the left side portion 6a side, the opposite side right side portion 6b is also similarly configured. There is.

Next, the lock of the lifting floor 9 will be described with reference to FIGS. As shown in FIG. 2, the lock device 50 that locks the lifting floor 9 includes front and rear portions 4 on the side of the lifting floor 9.
It is provided in various places. 5 (a) and 6 (a) respectively show a state in which the lock device 50 is unlocked.

The lock devices 50 provided on the front and rear side portions inside the lift floor 9 respectively have a lock claw 51 and a support shaft 52 for supporting a boss to which the lock claw 51 is fixed, and are integrated with the boss. The free end of the short arm 53 (see FIG. 5) is pivotally attached to the operating member 55 by a pin (not shown). Operating member 5
An operating portion 55a made of a bent piece is provided at the outer end of the lock device 5, and the lock device 5a is pulled by the user.
0 is unlocked. The operation member 55 can be operated after the extension floor is pulled out, which will be described later. Therefore, the extended floor cannot be stored unless the lifting floor 9 is locked by pushing in the operating portion 55a, so that the operating member 55 also has a function of preventing forgetting to lock.

An engaging hole 57 with which the lock claw 51 is engaged is formed in the support portion 56 provided at the position corresponding to the lock device 50 on the left side portion 6a. As shown in FIGS. 9 (c) and 10 (c), the inclined surface 56 is located below and on the back surface side of the support portion 56.
a is formed. Similarly, an inclined surface 51a that engages with the inclined surface 56a is formed on the inner edge of the lock claw 51. FIG. 7 shows a state in which the operating member 55 is pushed in and the lock claw 51 is rotated 90 ° in the horizontal direction.

A method of locking the lifting floor 9 will be described.
First, as shown in FIG. 8B, the lifting floor 9 is pulled up to the uppermost position, and the floor surface of the lifting floor 9 is slightly above the left side portion 6a. Then, the operating member 55 is pushed in to rotate the lock claw 51 by 90 ° to pass through the engagement hole 57, so that the lock claw 51 is projected from the lifting floor 9 as shown in FIG. 9.

Next, the elevating floor 9 is slightly lowered to engage the lock claw 51 with the lower portion of the engagement hole 57 of the support portion 56 as shown in FIG. This also prevents the lifting floor 9 from falling. Since the engaging portions of the lock claw 51 and the support portion 56 are the inclined surface 51a and the inclined surface 56a, when the lock pawl 51 and the support portion 56 are engaged with each other, they are attracted to each other, and It has a structure that increases rigidity as a rib when rolling.

Next, the extension floor 6 provided on the lifting floor 9
0 will be described with reference to FIGS. 2, 3, and 11.

The floor frames 62 of the extension floor 60 are inserted into and taken out from the plurality of sub-frames 61 provided on the lifting floor 9 along the front-rear direction,
A pillow member 63 is fixed to the outer end (rear end) of the floor frame 62. A road plate 65 is rotatably attached to the pillow member 63 by a hinge 66. The road plate 65 is the lifting floor 9
When it is in the raised normal position, it is in a suspended state as shown in FIG. 3 and is locked to the rear elevating guide 26 by the lock pin 67.

On the rear side (right side in FIG. 11) of the extension floor 60, the base of the top plate 69 is pivotally supported by a hinge (not shown). Guide columns 70 having guide grooves 70a are respectively provided upright at the ends of the left and right side portions 6a and 6b, and both free ends of the top plate 69 are supported by the guide grooves 70a so as to be guided. There is. Sign 71
Shows an example of side plates provided on the left and right side portions 6a and 6b of the luggage carrier 6.

The extension floor 60 has a floor frame 62 and a top plate 69, and the movement of the top plate 69 is the floor frame 62.
It is interlocked with the moving in and out of. When the floor frame 62 is retracted, the top plate 69 is in a standing posture at the rear end of the loading platform (see FIG. 11B), and when the floor frame 6 is pulled out from the lifting floor 9 as shown in FIG. Gradually falls and falls to the floor frame 62 side. In the state where the floor frame 62 is pulled out to the maximum (FIG. 11 (c)),
The top plate 69 is in a horizontal state on the floor frame 62, on which a loaded vehicle or a cart can move.

The operation of taking in and out the extension floor 60 is performed by a hydraulic cylinder 72 provided in the lifting floor 9. If equipment such as the hydraulic cylinder 72 cannot be used, the extension floor 60 can be manually moved in and out, and in this case, the weight of the top plate 69 is the weight of the extension floor 6.
It works to help draw 0. When the extension floor 60 is manually stored in the lifting floor 9, the top plate 69
Lifting the free end of the will help to pull in the extension floor 60. In addition, the top plate 69 is independently mounted on the loading platform 6
It is also possible that the top plate 69 is stored inside, and the floor frame 62 is pulled out, and then the top plate 69 is loaded on the floor frame 62.

When the road plate 65 is rotated in a substantially horizontal inclined state, it is held at that position by a locking member (not shown). The road board 65 functions as a so-called Ayumi board for guiding a cart provided with casters and the like onto the floor frame 62, and at the same time, the floor frame 62.
3 is fixed to the cargo bed 6 side as shown in FIG. 3, it can also serve as a rush prevention plate for preventing a following vehicle from rushing into the lower rear part of the truck 1.

When loading a load on the lifting floor 9, the extension floor 6
By operating the operation member 55 with 0 pulled out,
Each locking device 50 is unlocked. The road plate 65 is held at a position rotated from the hanging state to the inclined state. In this state, the plunger 11a of the lift cylinder 11 moves in a direction to be pulled into the lift cylinder 11, so that the outside of the drive chain 19 rotates clockwise in FIG.
The interlocking shaft 16 and the sprockets 21, 22 rotate in the same direction to lower the lifting floor 9. When loading a load on the lifting floor 9, the pillow member 63 of the extension floor 60 is always grounded on the ground 34. Then, when the load to be loaded on the lifting floor 9 is long, or when the platform with the load is far, or when there is a groove or the like between the platform and the load,
The extension floor 60 is pulled out and, for example, the cargo is loaded on the platform 6 in a state where it is hung on the platform.

After the load is loaded on the lifting floor 9, the plunger 11a of the lift cylinder 11 is moved in the extending direction, whereby the sprockets 21 and 22 are reversed to raise the lifting floor 9. At this time, the load only on the front end side of the lifting floor 9 is applied to the loading platform 6 side through the front sprocket 21, but the load at the rear end of the lifting floor 9 is applied to the ground surface 34 via the jack 41. Therefore, it is possible to prevent the action of overload on the rear wheel 46 side of the freight vehicle 1, the generation of an excessive moment to the rear end side centering on the rear wheel 46, and the instability of the loading work due to this. it can.

After the elevator floor 9 has been moved to the upper limit position, it is locked by the lock device 50, and then the extension floor 60 is stored and the road plate 65 is locked at the hanging position.
Since the lifting floor 9 is hoisted in the horizontal state and with a uniform force as described above, the load can be stably loaded.

Thus, for example, a large-sized freight vehicle of 4t class can be reliably loaded with a load of 2t or more, without using a loading heavy machine such as a crane or a forklift. Also, the weight of the luggage is 2 tons.
A vehicle (forklift, etc.) of a certain size can be safely loaded.

Further, by disposing the cargo handling device for raising and lowering the lifting floor 9 under the cargo bed 6, the cargo handling device according to the present invention can be applied not only to van type vehicles but also to flat body type vehicles. Can be applied. Further, the cargo handling device according to the present invention is, of course, suitable for loading a heavy load, but by applying the cargo handling device to a small van type vehicle, for example, a wheelchair or a long stretcher. It can be widely applied to loading.

[0055]

As described above, according to the invention of claim 1, the rear end portions of the left and right side portions of the cargo bed formed by providing the lifting floor capable of ascending and descending at the rear portion of the cargo bed, that is, after the cargo bed Since the fulcrum for supporting the cargo bed by supporting the end portion with the jack is located on the rear end side, a downward moment is generated around the rear wheel portion of the freight car and the load is unstable due to this. In particular, heavy loads such as heavy machinery can be stably loaded and unloaded without using a crane or a forklift.

If the left and right side portions (body frame and left and right outer subframes) of the rear portion of the luggage carrier are made stronger to make up the left and right side portions, the weight of the vehicle increases and the cost increases accordingly. However, since the rear ends of the left and right side parts are each supported by jacks,
It is possible to load a heavy load on the bed without increasing the strength of the left and right side portions.

According to the second aspect of the present invention, since the four corners of the lifting floor on which the load is loaded and moved up and down are always moved up and down with equal force and constant speed, the lifting floor loaded with the load is moved up and down. It is possible to prevent tilting motions of the lifting floor, and to stably load and unload heavy loads such as heavy equipment without tilting.

According to the third aspect of the present invention, since both sides of the lifting floor are constructed so as to be guided by the plurality of lifting guides, a lifting machine carrying a heavy load such as a heavy machine is lifted. When the floor is lifted or lowered, it is possible to prevent the swaying of the lifting floor and the lateral shift of the load due to this, and it is possible to stably load and unload the load.

Further, according to the invention of claim 4, since the extension floor is provided with the extension floor that can be pulled out, when the load to be loaded on the elevating floor is a long object, or the load platform is far away. In the case where there is a groove or other obstacle between the lifting floor and the load, the extension floor can be pulled out from the lifting floor to expand the floor to be lifted to ensure stable loading and unloading of the load. it can.

According to the fifth aspect of the invention, when the extension floor is pulled out from the elevating floor, the top plate is tilted from the upright state to the lying state in association with this, and the maximum extension position of the extension floor is reached. Then, the top plate covers the extension floor, and when the extension floor is stored, the top plate is erected in conjunction with this and can be used also as a rear side plate for closing the rear part of the loading platform, so that workability is improved and the apparatus is improved. Cost reduction can be realized, and furthermore, by covering the extension floor with the top plate, when loading the load on the lifting floor and the extension floor, loading and unloading of the load consisting of moving bodies having wheels, crawlers, casters, etc. Can be done stably.

Further, according to the invention of claim 6, since the road board which can be held in the hanging state and the inclined state is provided at the rear portion of the extension floor, the road board is provided with respect to the extension floor pulled out from the lifting floor. When the vehicle is in an inclined state, a vehicle such as a load or a vehicle can be guided to the extension floor, and when the extension floor is stored in the lifting floor and the road board hangs down to the rear of the load platform, The plate can also be used as a rush prevention plate for a following vehicle.

[Brief description of drawings]

FIG. 1 is a perspective view of a cargo handling device for a freight vehicle according to an embodiment of the present invention.

FIG. 2 is a plan view of a cargo bed and an extension floor of the cargo handling device according to the present invention.

3 is a side view of the device shown in FIG. 2. FIG.

FIG. 4 is a rear view of the device shown in FIG.

5A is a plan view of a rear elevation guide and a jack portion, and FIG. 5B is a side view of FIG. 5A.

[Fig. 6] Fig. 6 (a) is a lock device section of an elevated floor (unlocked state).
6B is a side view of FIG. 6A.

[Fig. 7] Fig. 7 (a) is a lock device for the lifting floor (locked state)
FIG. 7B is a plan view of FIG. 7A.

FIG. 8A is an operation diagram of the lock device, and is a plan view when the lifting floor is raised to the uppermost position and the lock device is in the unlocked state, and FIG. 8B is a bottom view of FIG. 8A. It is a perspective view.

FIG. 9A is an operation diagram of the lock device, and is a plan view when the lifting floor is raised to the uppermost position and the lock device is in a locked state, and FIG. 9B is a bottom view of FIG. 9A. FIGS. 3C and 3C are enlarged views of the lock claw portion and the support portion of FIG.

FIG. 10A is an operation diagram of the lock device, and is a plan view showing a state in which the lifting floor is slightly lowered from the uppermost position and the lock claw and the support portion are engaged with each other, and FIG. ) A bottom view of the drawing and (c) are enlarged views of the lock claw portion and the support portion of the drawing (b).

FIG. 11 (a) is a plan view of an elevating floor and an extension floor pulled out from the elevating floor to a maximum value, and FIG. 11 (b) is a side view showing a state in which the extension floor is stored in the elevating floor. ) The figure is a side view of the extension floor pulled out halfway from the lift floor,
FIG. 6D is a side view showing a state where the extension floor is pulled out from the lift floor at the maximum lower limit.

[Explanation of symbols]

1 lorry 2 body frame 3 subframes 5 floor boards 6 cargo bed 6c fixed bed 7 openings 9 Lifting floor 10 Lifting drive device 11 Lift cylinder 25 Lifting guide for front 26 Rear lift guide 27 outer cylinder 29 Inner cylinder 34 Ground 41 jack 60 extended floor 65 Road board 69 Top plate 70 Guide post

Claims (6)

[Claims] 1. A cargo handling of a freight vehicle in which a cargo bed is formed by a plurality of subframes arranged on a vehicle body frame and a floor plate attached to the subframes, and a load is put in and out from a rear end side of the cargo bed. A device, wherein a floor opening is formed in a state where left and right side portions of the loading platform are left at a rear end portion of the loading platform, and a vertical movement is possible between an upper limit position for closing the floor opening and the ground. The lift floor placed is installed in the floor opening, a lift drive device for lifting the lift floor is provided, and a plurality of jacks for supporting the left and right side portions when loading a load on the lift floor are provided on the left and right sides. A cargo handling device for a lorry, which is provided on each side. 2. The cargo handling apparatus according to claim 1, wherein the lifting drive device suspends four corners of the lifting floor to drive the lifting floor horizontally. 3. The left and right side portions have a plurality of lifting guides for guiding the left and right sides of the lifting floor when the lifting floor is raised and lowered, and the lifting guides are fixed to the left and right side portions. And an inner cylinder that is inserted into and removed from the outer cylinder and that advances and descends from the outer cylinder when the elevating floor descends and is housed in the outer cylinder when the elevating floor rises. A cargo handling device for a lorry according to claim 1 or 2. 4. The elevating floor is provided with an extension floor that can be taken in and out from a rear end portion of the elevating floor.
The cargo handling device for a lorry according to any one of 1 to 3. 5. The extension floor has an undulating top plate whose base is pivotally attached to the rear portion of the extension floor and whose free end is guided by a guide column that is erected on the loading platform. According to the operation of moving the extension floor in and out, the top plate has a fall position for covering the upper surface of the extension floor when the extension floor is pulled out and a rear side portion of the loading platform when the extension floor is stored in the lifting floor. The cargo handling device for a freight vehicle according to claim 4, wherein the cargo handling device is movable between the closed standing position and the standing position. 6. The extension floor has a road plate whose base is pivotally attached to a rear end portion of the extension floor, and the road plate is inclined with its free end in contact with the ground when the elevator floor is lowered. The cargo handling apparatus according to claim 4 or 5, wherein the cargo handling apparatus according to any one of claims 4 and 5, wherein a surface is formed and is suspended when the lifting floor rises and is in the floor opening.