JP4149254B2 - Slide synchronization mechanism of the load receiving platform in the retractable load receiving platform lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, a load receiving base provided so as to be movable up and down along a pair of left and right columns provided on a cargo box of a vehicle is slidable between a storage position below the cargo box and a work position behind the cargo box. More specifically, the present invention relates to a slide synchronization mechanism for sliding a load receiving table.
[0002]
[Prior art]
Conventionally, a load receiving table is provided so as to be able to move up and down along the support column via a slider provided in a pair of left and right columns that are erected on the cargo box of the vehicle. 2. Description of the Related Art There is provided a retractable cradle lifting device configured to be slidable back and forth along a pair of left and right slide rails with a work position behind the box (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 4-1207027 [0004]
[Problems to be solved by the invention]
However, in the case of sliding the load receiving table back and forth along the pair of left and right slide rails as in the conventional case, for example, when the left and right side portions of the load receiving table are displaced in the front and rear direction when sliding from the working position to the storage position, Both sides of the cargo cradle cannot be slid because both sides of the left and right sides do not enter the slide rail well, and both sides of the load cradle are affected by friction and dust generated between the left and right sides of the load cradle and each slide rail. If there is a resistance difference between them, it will shift in the front-rear direction when sliding.
[0005]
In this way, when the load receiving platform is shifted to the left and right and inclined and becomes slanted, smooth sliding operation becomes difficult. As a result, it is necessary to correct the left / right displacement of the load receiving table, which leads to a decrease in workability, and it may get stuck in the middle of the slide and stop and move, causing damage to the slide rail, load receiving table, etc. was there.
[0006]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a retractable load receiving device that can smoothly slide the load receiving table by synchronizing the sliding operations of the left and right sides of the load receiving table. An object of the present invention is to provide a slide synchronizing mechanism for a load receiving table in a table lifting device.
[0007]
[Means for Solving the Problems]
The slide synchronization mechanism of the load receiving platform in the retractable load receiving elevator apparatus according to claim 1 is configured such that the load receiving platform is attached to the support column via a slider provided in a pair of left and right columns that are erected on the cargo box of the vehicle. A retractable cradle that is slidable back and forth along a pair of left and right slide rails between the retracted position below the load box and the work position behind the load box. In the lifting device, sprockets are supported on the slide part of the load receiving table so as to be rotatable around the horizontal axis on both sides of the slide part, and the sprockets on the one side part are located on the same side part side. A chain having both ends connected to the slider is wound.
[0008]
In the slide receiving mechanism of the load receiving platform in the retractable load receiving elevator according to the second aspect of the invention, the sprocket is supported by the left and right sprockets on the front side of the vehicle by the interlocking shaft, and the left and right sprockets on the rear side of the vehicle are individually provided. Further, the left and right sprockets on the rear side of the vehicle are supported so as to be movable back and forth so that the tension of the chain can be adjusted.
[0009]
In the slide synchronization mechanism of the load receiving platform in the retractable load receiving elevator apparatus according to claim 3, the load receiving platform is configured such that the rear side portion of the vehicle is foldable on the front side portion of the vehicle and folded at the storage position. A rear end portion is disposed so as to protrude rearward from the slider.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 shows a retractable load receiving device lifting device.
[0012]
The retractable load receiving table lifting / lowering device 1 includes a pair of left and right columns 3 erected at the rear end of a cargo box 2 of a vehicle, and a slider 4 inserted into the column 3 so as to be movable up and down (see FIGS. 3 and 4). ), A load receiving platform 5 supported by the lower ends of the left and right sliders 4, and a lifting cylinder 7 connected to each slider 4 via a wire 6.
[0013]
Specifically, the support column 3 is formed of a hollow long body having a rectangular cross section, and the slider 4 is disposed therein. The slider 4 is provided with a plurality of elevating rollers (not shown) at the upper end portion and the middle portion thereof, and the elevating movement of the slider 4 is smoothly performed by these elevating rollers.
[0014]
One end of each wire 6 is fixed to the upper end of the left and right sliders 4. The wire 6 is guided upward from the slider 4, folded downward by a sheave 33 provided on the upper portion of the support 3, guided downward on the front side, and then sheaveed from the lower portion of the front support 3 (not shown). And the other end is appropriately fixed.
[0015]
As shown in FIG. 1, the elevating cylinder 7 is disposed at the front portion in the cross member 8 disposed between the support columns 3, and the wire 6 disposed as described above is extended and retracted by the elevating cylinder 7. The slider 4 is moved up and down by being drawn out from or pulled into the column 3.
[0016]
Therefore, as described above, by moving the slider 4 up and down by the lifting cylinder 7, the load receiving platform 5 connected to the slider 4 can be moved up and down between the ground and the floor surface of the cargo box 2.
[0017]
The load receiving platform 5 includes a proximal end side load receiving member (sliding portion) 51 and a distal end side load receiving member 52 which are divided into two front and rear sides, and the proximal end side load receiving member 51 and the distal end side load receiving member 52 are connected via a hinge 53. The distal end side load receiving member 52 is configured to be folded in two on the upper surface of the proximal end side load receiving member 51.
[0018]
Incidentally, guide grooves (not shown) are formed in the front-rear direction on the left and right sides of the base-end side cargo receiving member 51. On the other hand, a bracket 41 protrudes from the lower end of each slider 4 to the rear of the support column 3, and the first guide roller 42 provided at the lower end of the bracket 41 as shown in FIGS. It is arranged to roll freely in the guide groove. The bracket 41 is disposed so as to protrude rearward from the column 3 through a notch groove 32 (see FIG. 1) formed in the vertical direction on the rear surface 31 of the column 3.
[0019]
Further, as shown in FIGS. 3 and 4, the contact roller 43 provided at the lower end of the slider 4 slides the load receiving platform 5 backward from a storage position (see FIGS. 2 and 4), which will be described later, to the rear. When disposed at the projecting position (see FIG. 3), the base end portion of the base end side load receiving member 51 is supported, and in combination with the support from below by the first guide roller 42, the load receiving base. 5 is held in a horizontal state. At this time, the first guide roller 42 is disposed at the front end position of the guide groove.
[0020]
Furthermore, a second guide roller 44 is provided at the base end portion of the base end side cargo receiving member 51. The second guide roller 44 is provided so as to be able to roll back and forth along a pair of left and right slide rails 21 provided below the rear portion of the cargo box 2, and the load receiving platform 5 is slid through the second guide roller 44. 21 so that it can move smoothly.
[0021]
The load receiving platform 5 configured in this manner is slid to the front end portion of the slide rail 21 in a folded state and is stored below the rear portion of the load box 2, and the rear side of the slide rail 21. The front-end side load receiving member 52 that is slid and folded is horizontally deployed on the extension of the base-end side load receiving member 51 and moved up and down between the ground and the floor surface of the load box 2 as shown in FIG. Can be arranged. 3 and 4, the distal end side receiving member 52 is omitted, and only the proximal end side receiving member 51 is illustrated.
[0022]
In the retracted position, the rear end portion of the folded load receiving platform 5 is disposed in a state of protruding rearward of the vehicle from the bracket 41. Accordingly, the rear end portion of the load receiving platform 5 arranged at the retracted position can also serve as a bumper during traveling, thereby ensuring safety during traveling.
[0023]
Further, a tuning mechanism 10 as shown in FIGS. 2 to 4 is provided between the load receiving tray 5 and the slider 4. The tuning mechanism 10 is for smoothly sliding the load receiving platform 5 along the left and right slide rails 21 between the storage position and the working position as described above. Each of the sprockets 11 and 12 provided on the front and rear sides, and a pair of left and right chains 13 wound around the front and rear sprockets 11 and 12 on each side.
[0024]
As shown in FIGS. 3 and 4, the sprockets 11 and 12 are integrally supported by the horizontal interlocking shaft 11a on the left and right sprockets 11 on the front side of the vehicle, and the left and right sprockets 12 on the rear side of the vehicle are respectively connected to the horizontal shaft 12a. Is supported individually.
[0025]
Further, the left and right sprockets 12 on the rear side of the vehicle are supported so that their horizontal shafts 12a can move back and forth so that the tension of each chain 13 can be adjusted.
[0026]
Both ends of the chain 13 are fastened to brackets 41 on the slider side that support the load receiving platform 5. Specifically, both ends of the chain 13 are fastened to the hook 41a using, for example, a hook 41a provided on the bracket 41 for preventing the load receiving stand 5 from falling.
[0027]
Further, the chain 13 is arranged using the space in the side portion of the base end side load receiving member 51 on the lower side, and the upper side is arranged above the side portion of the base end side load receiving member 51 as described above. It is wound around.
[0028]
Next, the operation of the retractable load receiving table elevating device 1 configured as described above will be described.
[0029]
As shown in FIG. 2, in a state where the load receiving platform 5 is disposed at the storage position, the operator first pulls the load receiving platform 5 to the rear of the load box 2. Thereby, in the load receiving platform 5, the second guide roller 44 provided at the base end of the base end side load receiving member 51 moves along the slide rail 21, and the first guide roller 42 moves along the guide groove. Thus, it is arranged at a work position protruding rearward of the packing box 2.
[0030]
In this way, when the load receiving platform 5 is slid from the storage position to the working position, the left and right sprockets 11 and 12 change their winding positions of the pair of left and right chains 13 as the load receiving table 5 slides. By rotating in synchronism with the left and right by the sprocket 11 at the front, the left and right sides slide in synchronism with each other without the load receiving platform 5 being displaced back and forth with respect to the left and right slide rails 21. Thereby, the load receiving platform 5 can be smoothly slid through the first guide roller 42 and the second guide roller 44.
[0031]
Next, the front end side load receiving member 52 of the load receiving platform 5 folded at this working position is rotated rearward so that the proximal end side load receiving member 51 and the front end side load receiving member 52 are deployed horizontally. Thereafter, the lifting cylinder 7 is expanded and contracted, and the slider 4 is moved up and down along the support column 3 through the wire 6, so that the load receiving platform 5 connected to the slider 4 is placed between the ground and the floor surface of the packing box 2. Thus, the cargo is loaded and unloaded between the ground and the cargo box 2 through the cargo receiving platform 5.
[0032]
When the cargo loading / unloading operation is completed, the cargo receiving platform 5 is folded by an operation reverse to the above-described operation, and is placed at the storage position by being pushed downward from the rear of the cargo box 2 to the rear of the cargo box 2. Also at this time, the receiving platform 5 can be smoothly slid while being synchronized with each other through the first guide roller 42 and the second guide roller 44 by the synchronization mechanism 10 and can be arranged at the storage position.
[0033]
The above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope.
[0034]
For example, in the present embodiment, the description has been given of the case where the load receiving platform 5 is manually slid between the storage position and the working position. However, the load receiving platform 5 is mounted using an appropriate actuator such as an expansion cylinder or a motor. A slide operation may be performed.
[0035]
Further, although the description has been given with respect to a structure in which the load receiving platform 5 is folded in half, the load receiving platform 5 is not limited to being folded in two, but may be a so-called single-folded one that is not foldable, or configured to be folded in three or more. May be.
[0036]
【The invention's effect】
As described above, according to the slide synchronization mechanism of the load receiving table in the retractable load receiving apparatus of the present invention, the left and right sides of the load receiving table are synchronized along the slide rail across the slider and the load receiving table. By providing a synchronizing mechanism including a sprocket and a chain for moving back and forth, the receiving platform can be smoothly slid from side to side without deviation by this synchronizing mechanism.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall schematic configuration of a retractable cargo receiver lifting device.
FIG. 2 is a side view showing a retractable load receiving table lifting device disposed in a storage position.
FIG. 3 is an enlarged side view showing a retractable load receiving table lifting device disposed at a work position.
FIG. 4 is an enlarged front view showing a retractable load receiving table lifting device disposed at a storage position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Retractable load receiving device lifting / lowering device 2 Packing box 21 Slide rail 3 Support column 4 Slider 5 Load receiving stand 51 Base end side load receiving member (slide part)
10 Tuning mechanism 11, 12 Sprocket 13 Chain

Claims (3)

A load receiving table is provided so as to be movable up and down along the support column via a slider provided in a pair of left and right columns that are erected on the cargo box of the vehicle. In the retractable load receiving device lifting and lowering device configured to be slidable back and forth along a pair of left and right slide rails with the rear working position,
Sprockets are supported on the slide part of the load receiving table so as to be rotatable about a horizontal axis on both sides of the slide part, respectively, and the sprockets on the front and back sides of the one side respectively have both ends on the slider side located on the same side part side. A slide synchronization mechanism of a load receiving platform in a retractable load receiving platform lifting device, wherein a chain connected to each other is wound. In the sprocket, the left and right sprockets on the front side of the vehicle are supported by interlocking shafts, and the left and right sprockets on the rear side of the vehicle are individually supported. Further, the chain tension of each of the left and right sprockets on the rear side of the vehicle is adjusted. The slide synchronizing mechanism of the load receiving platform in the retractable load receiving platform lifting and lowering device according to claim 1, wherein the slide receiving mechanism is supported so as to be movable back and forth as much as possible. The back of the vehicle is configured to be foldable on the front side of the vehicle, and the folded rear end of the load receiving stand is disposed to protrude rearward from the slider at the storage position. 3. A slide synchronization mechanism of a load receiving table in the retractable load receiving lift apparatus according to item 1 or 2.

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