JPH1178659A - Tire stopper of cargo cradle elevating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire stopper of cargo cradle elevating/sinking device furnished at the forefront of a cargo cradle, which can be held in the restricting position easily by manual manipulation and can be tied certainly at the time of being folded. SOLUTION: A load table elevating/sinking device includes a cargo cradle 6 installed movably up and down, wherein at the forefront of the cargo cradle 6, a tire stopper 66 is furnished rotatably between the overhang position in which the tire stopper is arranged overhung onto approx. the same plane from the tip of the 6 and the folded position in which it is folded on the tip of the table. The tire stopper 66 is furnished with a hook 67 which is detained with a hole 673 formed at the tip of the cargo cradle when the tire stopper 66 is raised at a certain angle by the tip of the cargo cradle 6. The cargo cradle 6 is equipped at its tip with a magnet 68 to tie the tire stopper 66 which is folded in the folded position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire stopper provided at the tip of a vertically movable load receiving platform in a loading platform lifting device.

[0002]

2. Description of the Related Art Conventionally, as a tire stopper provided on a receiving stand of a receiving stand elevating device, for example, Japanese Utility Model Publication No. 555-1
No. 963, a tire stopper is rotatably provided at the tip of the loading tray by a hydraulic cylinder, and when the loading tray is moved up and down, the tire is raised vertically to the tip of the loading tray. And when the load receiving platform reaches the ground, it is configured to rotate downward so as to be substantially flush with the load receiving platform and to transfer the load.

[0003]

However, in the prior art, the tire stopper is operated by the hydraulic cylinder, which complicates the hydraulic circuit and does not operate when a failure such as oil leakage occurs. There was a problem in terms of safety.

Although the tire stopper can be manually rotated, it is necessary to surely and easily hold the tire stopper at a regulated position raised to prevent the load from falling. When the tire stopper was not used, it was necessary to securely fasten it at the folded position.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is intended to easily and manually hold a tire stopper provided at the tip of a loading tray at a regulating position and securely secure the tire stopper at the time of folding. It is an object of the present invention to provide a tire stopper of a loading tray lifting device that can be used.

[0006]

According to a first aspect of the present invention, there is provided a tire stopper of a loading tray elevating device, wherein the loading tray is provided so that the loading tray can be raised and lowered. A stopper is provided rotatably between an extended position where the stopper is extended substantially on the same plane from the tip of the loading tray and a folded position where the stopper is folded on the tip of the loading tray. Is provided with a hook that locks into a locking hole formed at the distal end of the load receiving table when it is raised at a predetermined angle at the distal end of the load receiving table.

According to a second aspect of the present invention, there is provided a tire stopper of the loading tray elevating device, wherein a magnet for holding the tire stopper folded at the folding position is provided at a tip portion of the loading tray.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 4 and 5 show the structure of the retractable loading / unloading device. In the figure, reference numeral 1 denotes, for example, a packing box mounted on a vehicle frame of a vehicle, and a loading table lifting device 2 is provided at a rear end of the packing box 1.

The loading table lifting device 2 is of a retractable type which can be stored below the rear end bottom surface of the packing box 1, and has a fixed frame 3 fixed below the rear end bottom surface of the packing box 1, A slide frame 4 slidable in the front-rear direction of the packing box 1 along the frame 3, a load receiving table 6 provided on the slide frame 4 via a lifting drive unit 5, and a load receiving table 6;
And a storage position for storing the lower part of the packing box 1 below the rear bottom surface of the packing box 1 via the slide frame 4 together with the lifting / lowering driving means 5.
And a storage means 7 which is disposed at a work position for projecting rearward of the packing box 1 together with the lifting drive means 5.

The fixed frame 3 includes guide rails 31 provided on the left and right sides below the bottom surface of the packing box, and connecting members 3 for connecting the front end and the rear end of the guide rails 31.
The guide rails 31 are arranged with their openings facing inward.

The slide frame 4 is provided with a slide plate 41 opposed to and adjacent to the guide rail 31.
And two connecting members 42 before and after connecting the slide plates 41.

A guide roller 43 is provided on the outer surface of the slide plate 41 at the front and rear.
3 is rotatably fitted into the guide frame 31.

The lifting drive means 5 is provided between a rotating shaft 51 rotatably supported by the rear end of the slide plate 41 of the slide frame 4 and the rear end of the slide plate 41 and the load receiving table 6. The compression arm 53 includes a tension arm 52 and a compression arm 53 interposed therebetween, and an elevating cylinder 54 for driving the rotation shaft 51 to rotate.

The elevating cylinder 54 has a base end supported by a mounting member 44 fixed to a substantially central portion of the connecting member 42 of the slide frame 4, and a telescopic rod 541 is attached to the rotating shaft 51 by a bracket 511. The rotation shaft 51 is rotated in both forward and reverse directions by the expansion and contraction operation of the expansion and contraction rod 541.

The tension arm 52 has one end provided integrally with the rotating shaft 51 at both ends of the rotating shaft 51 and the other end provided at an intermediate portion of the load receiving table 6. Is pivotally supported by a pin 521 (see FIG. 5). Therefore, the tension arm 52
With the rotation of the rotating shaft 51, the rotating shaft 51 vertically rotates about the rotating shaft 51.

The compression arm 53 has a slide plate 4 whose one end is lower than the rotation shaft 51.
1 is pivotally supported at the rear end by a pin 531 (see FIG. 5),
2 (see FIG. 5).

As described above, both ends of the rotating shaft 51 and each pin 52
1, 531, 532, the tension arm 5 connected between the rear end of the slide plate 41 and the mounting member 61.
2. The compression arm 53 constitutes a parallel link mechanism.

The receiving table 6 is configured such that three stages of a base 62, an intermediate table 63, and a tip table 64 are freely foldable.

At the end of the base 62 (on the rear side with respect to the packing box 1), the attachment member 61 to which the other ends of the tension arm 52 and the compression arm 53 are pivotally mounted as described above is fixed. And compression arm 53
The base end of the intermediate base 63 is pivotally supported by a pin 532 pivotally supporting the other end of the intermediate base 63 to the mounting member 61.

The distal end of the intermediate table 63 and the proximal end of the distal table 64 are pivotally supported by pins 65.

The base 62, the intermediate base 63, and the end table 64 pivotally supported by the pins 532 and 65 are connected to the end table 6
4 is pivoted upward to be placed on the intermediate table 63 in a folded state, and the intermediate table 63 in which the end table 64 is folded is pivoted upward to be folded and disposed on the base 62, so that The intermediate table 63 and the end table 64 are arranged in a state of being folded in three steps as a whole.

Further, the intermediate table 63 and the distal end table 64 are rotated from the base 62 in the reverse operation, so that the intermediate table 63 and the distal end table 64 extend rearward from the base 62. In this state, the base 62, the intermediate table 63, and the tip table 64 are arranged on substantially the same plane.

Further, at the tip of the tip table 64, FIG.
A tire stopper 66 as shown in FIG. The base end of the tire stopper 66 is rotatably provided at the distal end of the distal end base 64 via a hinge 661.
At an extended position that projects rearward from the end table 64, the end table 64 is held substantially flush with the end table 64, and
Is arranged at a folded position (see FIG. 3) folded on the front end of the.

The tip end of the tire stopper 66 is formed in a wedge shape, and by arranging it at the above-mentioned overhanging position, also plays a role of facilitating transfer of the load between the load receiving table 6 and the ground.

The tire stopper 66 is provided with a hook 67 for holding the tire stopper 66 at a position in the middle of rotation, that is, at a regulated position which is raised upward at a predetermined angle.

The hook 67 has a base end at the tire stopper 6.
6 is pivotally supported on both left and right sides by pins 671,
A locking piece 672 is formed at the tip.

The locking pieces 672 are locked in locking holes 673 formed on both left and right sides of the end table 64 when the tire stopper 66 reaches the regulation position.

Therefore, when the worker rotates the tire stopper 66 upward from the overhang position, the locking pieces 672 of the hook 67 slide on both sides of the end base 64 toward the locking holes 673, and this engagement is performed. The hook 67 is automatically locked by entering the stopper hole 673 by its own weight. As a result, the tire stopper 66 is held at the regulation position shown in FIG. 2, and prevents the load on the load receiving table 6 from dropping.

The locking state of the locking piece 672 and the locking hole 673 is determined by a protrusion 675 formed on the base end of the hook 67.
Can be easily released by rotating clockwise in FIG.

Further, a permanent magnet 68 for magnetically attaching the tire stopper 66 to the tire stopper 66 when the tire stopper 66 is folded on the tip stand 64 and securing the tire stopper 66 is provided at the distal end of the distal end base 64. Have been.

The storage means 7 is for moving the slide frame 4 back and forth along the guide frame 31. A storage cylinder 71 fixed to the fixed frame 3 and a telescopic rod of the storage cylinder 71 It is composed of a wire 72 stretched between the fixed frame 3 and the slide frame 4 through the tip of 711.

The storage cylinder 71 has a base end fixed to the fixed frame 3 and is horizontally disposed such that the telescopic rod 711 expands and contracts in the front-rear direction.

A pair of right and left pulleys 712 and 713 are independently rotatably provided at the end of the telescopic rod 711.

As shown in FIG. 4, the wire 72 has one end fastened to the vicinity of the storage cylinder 71 and a middle part extending and retracting rod 711 substantially parallel to the storage cylinder 71.
After being wound from the lower part to the upper part on one of the pulleys 712 provided therein, and then folded back, it is again returned to the rear side by a folding roller (not shown) provided on the front connecting member 42 of the slide frame 4 via a bracket. The slide frame 4 is folded back forward by a folding roller (not shown) provided via a bracket on the rear connecting member 42 of the slide frame 4, wound around from the upper part to the lower part by the other pulley 713, and then moved backward again. After being folded, it is fixed to the connecting member 33 on the rear side of the fixed frame 3.

By extending the wire 72 to the fixed frame 3 and the slide frame 4 through the pulleys 712 and 713 provided on the telescopic rod 711, the retractable operation of the telescopic rod 711 by the storage cylinder 71 is performed. As a result, the slide frame 4 moves back and forth, whereby the load receiving table 6 and the lifting / lowering drive means 5 folded together with the slide frame 4 are stored below the bottom surface of the rear end of the packing box. It can be arranged at the work position shown in FIG.

Next, the operation of the retractable loading / unloading device thus constructed will be briefly described.

First, when unloading of the cargo by the loading cradle 6 is not performed, such as when the vehicle is running, as shown in FIG.
By retracting the telescopic rod 711 of the storage cylinder 71 and moving the slide frame 4 to the front end side of the fixed frame 3, the load receiving table 6 and the lifting / lowering drive means 5 are arranged at the storage position below the rear end bottom surface of the packing box 1. doing.

When the load is unloaded by the load receiving table 6, the telescopic rod 711 of the storage cylinder 71 is extended, and the slide frame 4 is moved to the rear end side of the fixed frame 3. 6 and the lifting drive means 5 are arranged at the working position. As a result, the load receiving table 6 and the link mechanism of the lifting / lowering driving means 5 are arranged in a state protruding rearward from the rear end of the packing box 1.

Next, the intermediate table 63 and the end table 64 of the receiving table 6 folded at the working position are sequentially rotated, so that the base 62 and the intermediate table 6 constituting the receiving table 6 are rotated.
3 and the end stand 64 are arranged substantially on the same plane and extended behind the rear end of the packing box 1.

In this state, the tension arm 52 is rotated up and down through the rotating shaft 51 by extending and retracting the elevating cylinder 54 of the ascending and descending driving means 5, and the load receiving table 6 is moved up and down along with this rotating operation. The cargo box 1 is moved up and down to unload the cargo.

Here, when loading and unloading the cargo between the ground and the loading tray 6, the tire stopper 66 is disposed at the overhang position, thereby facilitating the unloading of the cargo.

When the loading tray 6 is being moved up and down,
The tire stopper 66 is pivoted upward from the overhang position to be disposed at the regulation position.
This prevents the load from dropping from the receiving table 6. This is particularly effective when loading and unloading a wheelchair or other mobile object with wheels.

When the above-described unloading operation is completed, the loading tray 6 is folded and placed at the storage position as described above. At this time, the tire stopper 66 is also folded at the folding position shown in FIG. 3, and is fixed by the permanent magnet 68 at this folding position.

As described above, by securing the tire stopper 66 at the folded position by the permanent magnet 68, the tire stopper 66 can be stably stored at the storage position without rattling even when the vehicle is running. it can.

In this embodiment, the description has been given of the case in which the tire stopper 66 is provided on the loading tray of the retractable loading tray elevating device. However, the tire stopper 66 is not limited to the retractable type but may be any type that is not retractable. The present invention can also be applied to a receiving tray of a type receiving tray lifting device. Also, in the present embodiment, a description has been given of a mechanism using a link mechanism as the lifting drive means. However, the lifting drive means is not limited to this. For example,
It may be one that raises and lowers the load receiving table along the post erected at the rear end of the packing box.

[0047]

As described above, according to the tire stopper of the loading stand lifting device according to the first aspect of the present invention, the tire stopper at the projecting position is rotated upward to lock the hook in the locking hole. By doing so, the tire stopper can be easily and manually held at the restricted position, and it is easy to use.

Further, according to the tire stopper of the loading tray lifting device according to the second aspect of the present invention, the tire stopper is secured by the magnet at the folding position, so that the tire stopper is stably stored without rattling. can do.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a tire stopper.

FIG. 2 is a side view showing a tire stopper disposed at a regulation position.

FIG. 3 is a side view showing a tire stopper disposed at a folded position.

FIG. 4 is a plan view showing the entire configuration of the retractable loading tray elevating device.

FIG. 5 is a side view showing the entire configuration of the retractable loading tray elevating device.

FIG. 6 is a side view showing a state where a receiving table or the like is arranged at a storage position.

[Explanation of symbols]

 2 Lifting device for loading table 6 Loading table 66 Tire stopper 67 Hook 672 Locking piece 673 Locking hole 68 Permanent magnet

Claims (2)

[Claims] 1. A loading tray lifting device provided with a loading tray that can be moved up and down, wherein a tire stopper is provided at the tip of the loading tray so as to project from the tip of the loading tray on substantially the same plane. The tire stopper is provided at the tip of the loading tray when the tire stopper is raised at a predetermined angle at the tip of the loading tray. A tire stopper for a loading / unloading device, wherein a hook is provided for locking the formed locking hole. 2. The tire stopper according to claim 1, wherein a magnet for securing the tire stopper folded at the folding position is provided at a tip end of the carrier.