JP3207748B2 - Loading platform lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading / unloading device for a vehicle such as a freight car, and more particularly to a loading / unloading device capable of storing a loading device below a vehicle body.

[0002]

2. Description of the Related Art A conventional loading / unloading device is disclosed in Japanese Patent Application Laid-Open No. 5-28.
As disclosed in Japanese Patent No. 6389, a rotating member is fixed to a rotatable shaft supported on the vehicle body side, and the rotating member is provided with a parallel link mechanism for horizontally holding a load receiving table. Further, an elevating cylinder for rotating the parallel link mechanism is provided between the rotating member and the parallel link mechanism, and a storage cylinder for rotating the rotating member is provided between the vehicle body and the rotating member.

[0003] In this way, during loading / unloading work, the lifting cylinder is extended and retracted to raise and lower the loading tray in a horizontal state.
After the work is completed, the loading cylinder is rotated by the storage cylinder and the parallel link mechanism is rotated by the lifting / lowering cylinder to store the load receiving table below the vehicle body.

[0004]

However, with the above structure, the whole is unitized and mounted on a vehicle body or the like. When mounting, the support member is fixed to the rear end of the vehicle body and the base of the storage cylinder is mounted on the vehicle body. Since the mounting work is necessary, there are multiple mounting locations, and the mounting position of the storage cylinder is at the back of the car body, so the worker must work while squatting into the back of the car body, making the work complicated and It was difficult.

[0005] Further, there is a problem that the storage cylinder cannot be mounted due to interference with a fender or the like of the rear wheel in some vehicles. SUMMARY OF THE INVENTION The present invention provides a lifting / lowering device for a loading tray that facilitates the work of attaching the vehicle to a vehicle body or the like and eliminates interference with a fender or the like.

[0006]

According to a first aspect of the present invention, a supporting member is fixed to a rear end of a vehicle body or a carrier, and a rotating member rotatably supported at both ends of the supporting member is provided. The rotating member is provided such that the bases of an upper link and a lower link whose front ends are supported by a connecting member are supported so as to form a parallel link mechanism. A horizontally-held loading tray is provided, and the rotating member is connected to one of upper and lower links, and a first driving means capable of vertically rotating the upper and lower links, and is connected to an end of a supporting member. And a second driving means capable of rotating the rotating member. The first driving means enables the loading table to be lifted and lowered to the loading table. The first driving means and the second driving means move the loading table to the vehicle body. It is characterized in that it can be stored below.

According to a second aspect of the present invention, the support member includes a support member body fixed to a vehicle body or a carrier, and a pair of left and right auxiliary members that rotatably support the rotating member and are fixed to the support member body. And characterized in that:

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of the present invention, 1 is a vehicle body,
A carrier 2 is mounted on the vehicle body 1. The vehicle body 1 may be composed of either a chassis frame and a subframe or a chassis frame only.

At the rear end of the vehicle body 1, there is provided a loading / unloading device 3 of the present invention. The loading / unloading device 3 is capable of loading / unloading cargo on / from the loading platform 2. The table elevating device 3 will be described. Reference numeral 4 denotes a support member which is attached to the rear end of the vehicle body 1 so as to extend in the left-right direction. The support member 4 includes a pipe-shaped support member body 5 having a large diameter in order to increase strength and a pair of left and right shaft-shaped small diameter members. And an auxiliary member 6.

The support member body 5 is fixed to the vehicle body 1 by a pair of upper and lower mounting members 8 being bolted to a fixing bracket 7 fixed to the vehicle body 1 and supported and welded to the mounting members 8. It has become so. The fixing bracket 7 has an L-shape, and is fixed to the rear side surface of the vehicle body 1 by welding around a plurality of cutout holes 9.

As shown in FIGS. 2 and 5, the auxiliary member 6 is partially tapered to match the large diameter of the support member main body 5 and can be inserted into the support member main body 5.
0 is provided. Thereby, the insertion portion 10 is inserted into the end of the support member main body 5, and the connection portion between the support member main body 5 and the auxiliary member 6 is welded to integrate the pair of left and right auxiliary members 6 with the support member main body 5. It has become.

Reference numeral 11 denotes a pivoting member rotatably provided at an end of the auxiliary member 6. The pivoting member 11 has a flat plate shape, and the auxiliary member 6 is located substantially at the center. A pair is provided. An upper shaft 12 and a lower shaft 13 are rotatably penetrated respectively above and below a front portion (left side in FIG. 1) of the auxiliary member 6, and a base of an upper link 14 is fixed to a protruding end of the upper shaft 12, and The base of the lower link 15 is fixed to the protruding end of the shaft 13 (inner than the upper link).

Each end of the upper and lower links 14, 15 is supported by a connecting member 16, and the upper and lower links 14, 15,
The parallel link mechanism 17 includes the rotating member 11 and the connecting member 16.
Is formed. The connecting member 16 is provided with a flat, two-foldable loading tray 18 in a horizontal state. When the loading tray 18 is not used, the loading tray 18 can be folded and raised as shown in FIG.

By the way, the receiving table 18 can be provided on a part of the upper and lower links 14 and 15. Reference numeral 19 denotes an elevating cylinder, which is a first driving means for rotating the upper link 14 up and down. The elevating cylinder 19 is disposed between the pair of rotating members 11 and between the auxiliary member 6 and the upper shaft 14. The barrel side is pivotally supported by the rotating member 11, and the rod side is an arm 20 integrated with the upper shaft 12.
It is pivoted on.

As a result, when the lifting cylinder 19 is extended, the upper and lower links 14 and 15 are pivoted upward to rotate the load receiving table 18.
Is raised and contracted, the upper and lower links 14 and 15 rotate downward to lower the load receiving table 18.
A storage cylinder 21 is a second driving means for rotating the rotation member 11 about the auxiliary member 6. The storage cylinder 21 is located between the pair of rotation members 11 and behind the auxiliary member 6 ( 1 (right side in FIG. 1), the barrel side is pivotally supported by the rotating member 11, and the rod side is pivotally supported by the arm 22 integrated with the auxiliary member 6.

Reference numeral 23 denotes a pin for fixing the load receiving table 18 to the connecting member 16 while the load receiving table 18 is standing. In the embodiment, the support member main body of the support member and the auxiliary member are fixed by welding, but the same operation and effect can be obtained by bolting. Further, although the lifting cylinder is connected to the upper link side, the same effect can be obtained even if it is connected to the lower link side.

The operation of the present invention will now be described with reference to FIG. 1. When loading and unloading cargo, the cargo is moved from the loading platform 2 to the loading tray 18 in the state shown in FIG. 19 is reduced and the receiving tray 18 is lowered, and when it reaches the ground (FIG. 6), the load is dropped from the receiving tray 18 to the ground. Loading cargo from the ground to the cargo bed can be performed in the reverse procedure.

At this time, the rotating member 11 is
1 is fixed. After the unloading work is completed,
First, as shown in FIG. 7, the loading table 18 is folded in two at the lifting position of the loading table, and then is erected and fixed to the connecting member 16 with the pin 23. In this state, the storage cylinder 21 is extended to rotate the rotating member 11 approximately 90 degrees clockwise in FIG. 7 (FIG. 8).

Thereafter, the lifting cylinder 19 is reduced, and the load receiving table 18 is stored below the vehicle body 1 as shown in FIG. By the way, when replacing the entire unitized loading tray elevating device 3 for repair or the like, it can be easily replaced simply by removing the mounting member 8, and the position of the mounting member 8 is also located behind the vehicle body 1. Since it is an end, work can be easily performed.

Further, the replacement of the rotating member 11 and the like can be performed only by removing the auxiliary member 6 from the support member main body 5, so that the work becomes easy.

[0021]

As described above, according to the present invention, a pivoting member is rotatably provided on a supporting member, and second driving means for pivoting the pivoting member is provided between the pivoting member and the supporting member. In addition, the first drive means for raising and lowering the loading table is also provided, so mounting to the vehicle body etc. requires only attaching the support member,
In addition, there is no need to sink into the interior of the vehicle body, and the mounting work is very simple and easy.

Further, since it is not necessary to consider the interference between the rear wheel and the fender or the like, the rear wheel can be mounted on any vehicle.

[Brief description of the drawings]

FIG. 1 is an overall view of the present invention.

FIG. 2 is an enlarged view of FIG. 1A-A.

FIG. 3 is a cross-sectional view of FIG. 2BB.

FIG. 4 is a cross-sectional view of FIG. 2C-C.

FIG. 5 is an assembled state diagram of a support member.

FIG. 6 is an operation diagram when the loading tray is lowered to the ground.

FIG. 7 is an operation diagram at the time of starting storage of a loading tray.

FIG. 8 is an operation diagram at the time of intermediate storage of a loading tray.

FIG. 9 is an operation diagram when storage of the loading tray is completed.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 vehicle body 3 loading tray elevating device 4 support member 11 rotating member 14 upper link 15 lower link 16 connecting member 17 parallel link mechanism 18 loading tray 19 lifting cylinder 21 storage cylinder

Claims (2)

(57) [Claims] 1. A supporting member is fixed to a rear end of a vehicle body or a bed, and a rotating member rotatably supported at both ends of the supporting member is provided. The bases of the upper link and the lower link that are pivotally supported are pivotally supported so as to form a parallel link mechanism, and a loading tray that is horizontally held by either the connecting member or the upper / lower link is provided. A first driving means connected to one of the upper and lower links to rotate the upper and lower links up and down, and a second driving means connected to an end of the support member and rotating the rotating member. A load receiving platform elevating device, wherein the load receiving platform can be moved up and down to the loading platform by the first driving means, and the loading platform can be stored below the vehicle body by the first driving means and the second driving means. The support member includes a support member main body fixed to a vehicle body or a carrier, and a pair of left and right auxiliary members that rotatably support the rotating member and are fixed to the support member main body. The lifting / lowering device according to claim 1, further comprising: