JPS6239955Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loading platform leveling device in a loading platform lifting/lowering device.

The loading platform in a conventional loading platform lifting/lowering device is rotatably supported by a pair of left and right pillars, and is further held horizontally by a pair of left and right bendable support rods.

However, in the above configuration, if the lengths of the pair of right and left support rods are even slightly different, it will not be possible to hold the loading platform horizontally in the horizontal direction. Accuracy is often required, which has the drawback of requiring extra man-hours and a large amount of time.

In order to eliminate the above-mentioned drawbacks, the present invention provides an adjustment rod on the pivot portion of the support rod so that the horizontal deviation of the loading platform can be corrected by this adjustment rod.

The following embodiment will be explained with reference to the drawings. 1 is the vehicle body 2.
A cargo box 1 is mounted on the cargo box, and a cargo platform lifting device 3 is provided at the rear of the cargo box 1.

The loading platform elevating device 3 includes a pair of left and right parallel link mechanisms 4, 4, which are the main bodies of the lifting device, a pair of left and right columns 5, 5, a loading platform 6, and a pair of left and right support rods 7,
It consists of 7.

The parallel link mechanisms 4, 4 are attached to the vehicle body 2 and are moved up and down by a hydraulic cylinder 8.

Supports 5, 5 are pivotally supported at the ends of each of the parallel link mechanisms 4, 4, and a base portion of a loading platform 6 is rotatably supported below each of the above-mentioned supports 5, 5.

A pair of right and left support rods 7, 7 are provided between each of the pillars 5, 5 and the load receiving platform 6, and the load receiving platform 6 is held horizontally by the support rods 7, 7.

Since the pair of support rods 7, 7 have the same structure, one of them will be explained. In order to enable the cargo receiving platform 6 to be stored upwardly, the upper support rod 9 and the lower support rod 10 are connected in a bendable manner, and a part of the length is attached to the connecting portion. Hole 1
1 is formed.

The other end of the upper support rod 9 is pivotally supported by the support column 5 by an adjustment rod 12, and by operating the adjustment rod 12, the upper support rod 9 can be moved up and down, so that the horizontal correction of the loading platform 6 can be performed. ing.

As shown in FIGS. 3 and 4, the adjustment rod 12 has a large-diameter stopper part 13 in the center, a fixing part 16 in which a nut 15 is screwed into a medium-diameter male screw 14 on one side, and a small-diameter stopper part 16 on the other side. The supporting portion 17 is formed to be slightly eccentric H from the axis of the fixed portion 16.

The adjusting rod 12 is fixed to the support 5 by passing the male thread 14 of the fixing part 16 through the support 5 and tightening the nut 15 screwed into the male thread 14, thereby connecting the nut 15 and the stopper part 13. The support column 5 is clamped and fixed.

The support rod 7 is attached to the adjustment rod 12 by attaching the support portion 17 of the adjustment rod 12 to the upper support rod 9.
A stopper piece 18 is welded to the support portion 17 to prevent the upper support rod 9 from coming off.

A groove 19 is provided at the end of the male thread 14 of the adjustment rod 12, and the adjustment rod 12 can be rotated by inserting a screwdriver or the like into the groove 19.

Although a parallel link mechanism is used as the main body of the lifting device in the embodiment, the present invention is not limited to this mechanism, and even a vertical lifting mechanism that vertically lifts and lowers the loading platform can have the same effect. be.

Further, in the embodiment, an adjustment rod is provided on each support rod, but it is sufficient if only one support rod is used, and the adjustment rod can be attached at a pivot point of the support rod.

Furthermore, the structure of the fixing part is not limited to a male screw and a nut, but any structure that can compress the support column together with the stopper part will have the same effect.

The present invention has the above-mentioned structure, and the operation will be explained next. At the time of manufacture, the lengths of the left and right support rods 7, 7 did not match, or the mounting device was misaligned, so the cargo receiving platform 6 was If the adjustment rod 12 on the left side is tilted downward, first loosen the nut 15 from the position shown in Figure 3, insert the screwdriver into the groove 19, and rotate the adjustment rod 12 to the position shown in Figure 5 to fix it. Axis center of part 16 and support part 1
The support rod 7 is pulled up by an amount H of eccentricity with respect to the axis of the support rod 7. By pulling up the support rod 7, the load receiving platform 6, which had been tilted downward to the left, becomes horizontal, and in this state, the nut 15 is tightened to fix the adjustment rod 12.

If the parallel link mechanism 4 is rotated by the hydraulic cylinder 8 while the cargo receiving platform 6 is held horizontally in this manner, cargo can be loaded and unloaded safely.

As described above, the present invention provides an adjustment rod having an eccentric fixing part and a supporting part on the shaft support of the holding rod for horizontally holding the loading platform, and by rotating the adjusting rod, the loading platform can be held horizontally. Since the position can be adjusted, the extra man-hours and large amount of time that were conventionally required when manufacturing a loading platform are no longer required.

In addition, since horizontal adjustment can be easily performed, even if the loading platform is tilted for some reason during use, it can be quickly corrected, and work safety can be ensured.

[Brief explanation of the drawing]

Figure 1 is a side view, Figure 2 is a front view, Figures 3 and 5 are enlarged sectional views of main parts, Figure 4 is A of Figure 3.
-A and FIG. 6 are B-B diagrams in FIG. 5. 5 is a column, 6 is a loading platform, 7 is a support rod, 12 is an adjustment rod, 13 is a stopper part, 16 is a fixing part, 1
7 is a support part.

Claims (1)

[Scope of utility model registration request] A pair of left and right columns, a loading platform rotatably supported at the bottom of the columns, a support rod for supporting a pair of left and right loading platforms pivotally supported between each column and the loading platform, and raising and lowering the columns. In a cargo platform elevating device consisting of a lifting device main body, an adjustment rod is provided at one of the shaft fulcrums of at least one of the pair of left and right support rods, and a column or a cargo platform is provided on one of the adjustment rods. A support part for supporting the support rod is formed on the other side of the fixing part, and the axis of the fixing part and the axis of the support part are made eccentric, and the horizontal adjustment of the loading platform can be performed by rotating the adjustment rod. 1. A cargo platform horizontal adjustment device in a cargo platform lifting/lowering device, characterized in that: