JP2718592B2 - 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 lifting / lowering a loading / unloading pallet so as to unload cargo and to store it compactly when not in use.

[0002]

2. Description of the Related Art In general, a loading tray elevating device is provided with upper and lower links so as to have a parallel link mechanism on a vehicle body below the loading tray, and a loading tray is provided horizontally at the end of the upper and lower links. Is rotated to raise and lower the receiving table. By the way, when the receiving platform is not used,
As disclosed in Japanese Unexamined Patent Publication No. 3-46243, a loading table is raised and stored behind a rear door of the loading table.

[0003] Therefore, a platform having the same height as the packing box is used.
There is a problem that when loading and unloading cargo from a store, the stored receiving tray is in the way and the rear door cannot be opened. Therefore, in order to solve the above-mentioned problems, Japanese Utility Model Laid-Open No. 57-14
As disclosed in Japanese Patent No. 7136, the loading tray is lowered, the loading tray is folded and turned, and in this state, the upper and lower links are rotated upward to store the loading tray below the loading tray. ing.

[0004]

However, in the above structure, the upper and lower links are located on the left and right, but the receiving tray has the same width as the loading platform, so that a large storage space is secured below the loading platform. Because of necessity, it is necessary to cut out various reinforcing girders of the vehicle body and the luggage carrier located in the storage space, and when the existing vehicle is provided, a significant modification is required.

[0005] Further, since the car body or the like is notched, there is a disadvantage that the strength of the cargo bed is reduced and heavy goods cannot be loaded. SUMMARY OF THE INVENTION An object of the present invention is to provide a loading tray lifting device capable of storing the loading tray compactly with almost no modification of the vehicle body or the loading platform.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a pair of left and right rotating members rotatably provided on a vehicle body or a loading bed below a loading bed, and a rotation center of a base coincides with a rotation center of the rotating member. Sa
The upper link and the base below the center of rotation of the pivoting member.
And the upper and lower links
A link that connects the tips to form a parallel link mechanism
On the connecting member and the connecting member or the upper and lower link side,
A load that is pivotally supported by the connecting member so that it can be held horizontally and horizontally.
A pedestal and provided on the vehicle body or the cargo bed,
Rotating the rotating member to store the loaded receiving table below the vehicle body
A first driving means for driving the mounting member;
The upper and lower links for raising and lowering the held receiving platform
And second driving means for rotating at least one of the two.

[0007]

When loading / unloading the load, the second driving means is driven to rotate the upper / lower link up and down, and the load receiving table is moved up and down in a horizontal state to load / unload the load.
When storing the loading table, the loading table is raised and overlapped with the connecting member, and is fixed to the connecting member or the like. In this state, the rotating member is rotated by the first driving means to bring the loading table close to the vehicle body. Store up to the position.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Reference numeral 1 denotes a packing box mounted on a vehicle body 2. The packing box 1 has a carrier 3 and a rear door 4.
And an auxiliary girder 6. The vehicle body 2 may be composed of either a chassis frame and a subframe or a chassis frame only.

A support member 7 extending in the left-right direction is fixed to a lower portion of a rear end of the vehicle body 2, and a pair of mounting members 8 are erected at both ends of the support member 7. A cylindrical holding member 9 is fixed to the end. The holding member 9 is rotatably supported by penetrating one end of a shaft 10, and a stopper 11 is provided on the shaft 10 to prevent the shaft 10 from coming off.

In the middle of the shaft 10, a shaft 10
A pair of left and right rotating members 12 rotatably supported above are provided, and a storage as a first driving means is provided between one end of the rotating member 12 and a bracket 13 extending outward from the vehicle body 2. The storage cylinder 14 is provided, and the rotation member 12 can be rotated by expansion and contraction of the storage cylinder 14. The base of the upper link 15 is fixed to the other end of the shaft 10, the base of the lower link 16 is pivotally supported at one corner of the other end of the rotating member 12, and the ends of the two links 15, 16 are L-shaped in cross section The parallel link mechanism is formed by pivotally supporting the connecting members 17 respectively.

A base of a loading tray 18 is supported at the lower part of the connecting member 17 so that the loading tray 18 is held horizontally by a bending link 19 provided between the connecting member 17 and the loading tray 18. Has become. The receiving table 18 comprises a receiving table body 20 and an auxiliary table 21 which is hinged to the tip of the receiving table body 20 and can be folded on the receiving table body 20.

Holes 22 and 23 are provided in the connecting member 17 and the side surface of the loading table 18, respectively. When the bending link 19 is folded and the loading table 18 is rotated upward, the holes 22 and 23 coincide with each other. The loading table 18 can be fixed to the connecting member 17 by inserting the pin 24 into the holes 22 and 23. An elevator cylinder 25 is a second driving means for rotating the upper link 15. The elevator cylinder 25 is disposed between the pair of rotating members 12, and one end of the elevator cylinder 25 is connected to the rotating member 12. The other end is pivotally supported at the other corner, and the other end is pivotally supported by an arm 26 fixed to the shaft 10,
The upper link 15 can be turned up and down by expansion and contraction of the lifting cylinder 25.

In the embodiment, the loading tray is fixed to the connecting member when the loading tray is stored. However, the loading tray can be fixed to a rotating member, a link or a shaft via an appropriate means. It is also possible to rotate the lower link with the lifting cylinder.

Further, it is also possible to provide a rotating member on the loading platform side. The operation of the present invention will now be described with reference to FIG. 1. When loading and unloading work, as shown in FIG.
Is rotated counterclockwise in FIG. 1 to be fixed at the forward rotation position. In this state, when raising the load receiving table 18 from the solid line position to the dashed line position, the elevating cylinder 25 is extended to rotate both the links 15 and 16 upward, and to lower from the dashed line position to the solid line position. Is the lifting cylinder 2
5, the links 15 and 16 are pivoted downward, whereby the unloading of the load between the ground and the loading platform 3 is performed.

At this time, the receiving table 18 is held horizontally by the bending link 19. When storing the loading tray, the loading tray 18 is first raised and lowered to the position indicated by the dashed line in FIG. 3, and then the auxiliary tray 21 is folded and fixed on the loading tray body 20. When the receiving table 18 is rotated upward from the alternate long and short dash line position to the solid line position, both holes 22, 2 of the connecting member 17 and the receiving table 18 are rotated.
3 coincides with each other, and the pin 24 is inserted into the holes 22 and 23 to fix the load receiving table 18 to the connecting member 17.

In this state, the storage cylinder 14 is extended, and the rotating member 12 is pivoted around the shaft 10 as shown in FIG.
Turn about 90 degrees clockwise. At this time, since the shaft 10 is integrated with the rotating member 12 by the lifting cylinder 25, the shaft 10 also rotates together with the rotating member 12 to lower the load receiving table 18 somewhat. And reaches the rearward turning position.

Thereafter, the elevating cylinder 25 is reduced, and the connecting member 17 and the loading table 18 are stored in a substantially horizontal state at a position below the vehicle body 2 as shown in FIG. At that time, both links 1
Since the links 5 and 16 are located outside of the vehicle body 2 and the main box 5 of the packing box, the two links 15 and 16 can be raised without being obstructed by the vehicle body 2 and the main box 5 of the packing box. 2 can be close to the lower surface.

After storing the loading table 18, the vehicle travels in that state. In the loading / unloading place where the platform is present, the packing box 1 is brought close to the platform in the stored state, and the rear door 4 is opened to perform the loading / unloading operation. In the embodiment, the loading cylinder is stored by extending and retracting the storage cylinder and the lifting cylinder. However, if the storage start position is lower than the one-dot chain line in FIG. 3, the loading cylinder is operated only by the storage cylinder. Can be stored.

[0019]

As described above, according to the present invention, a rotating member is rotatably provided on a shaft provided on a vehicle body or the like, and the bases of upper and lower links forming a parallel link mechanism are pivotally supported on the shaft and the rotating member. A connecting member and a loading tray are provided at the tip of the upper and lower links, and the loading tray can be stored by rotating the rotating member, so that the storage space of the loading tray can be secured as in the related art. There is no need to cut out a part of the vehicle body or the like, and the vehicle can be easily attached to an existing vehicle without significant modification.

Further, since it is not necessary to cut out the vehicle body or the like, it is possible to solve the conventional disadvantage that the strength of the packing box is reduced. Furthermore, since the center of rotation of the rotating member is made to coincide with the center of rotation of the upper link, the load receiving table can be stored more forward and upward, and the amount of protrusion from the vehicle body can be extremely reduced.

[Brief description of the drawings]

FIG. 1 is an operation state diagram at the time of unloading work of the present invention.

FIG. 2 is an AA diagram of FIG.

FIG. 3 is an operation initial state diagram when the loading tray is stored.

FIG. 4 is an operation intermediate state diagram when the loading tray is stored.

FIG. 5 is an operation final state diagram when the loading tray is stored.

FIG. 6 is a BB diagram of FIG. 3;

[Explanation of symbols]

 2 Body 3 Carrier 10 Shaft 12 Rotating member 14 Storage cylinder 15 Upper link 16 Lower link 17 Connecting member 18 Loading table 25 Elevating cylinder

Claims (1)

(57) [Claims] 1. A pair of left and right rotating members rotatably provided on a vehicle body or a bed under a bed, and a center of rotation of a base is located forward.
An upper link aligned with the center of rotation of the pivot member and a base
Is pivotally supported by a pivot member below the pivot center of the pivot member.
Link the upper link and the lower link, and
Connecting member forming a locking mechanism, and the connecting member
Or, on the upper / lower link side, overlap
And a loading platform that is supported so that it can be held horizontally.
Is provided on the loading platform, and the stacking-supported loading platform is located below the vehicle body.
First driving means for rotating the rotating member to be stored in
Raises and lowers the loading table provided on the mounting member and held horizontally
To rotate at least one of the upper and lower links
And a second drive means for causing the load receiving table to move up and down .