JP3708696B2 - Loading platform lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load receiving table lifting device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a load receiving platform elevating device, for example, as shown in Japanese Utility Model Publication No. 4-9219, a load receiving platform is provided at the rear end of a vehicle body via a link mechanism so as to be movable up and down. The other two ends of the two first links and the second link are pivotally supported on the rear end side of the vehicle body, and one ends of the first link and the second link are pivotally supported on the upper and lower portions of the movable arm. A cradle configured to be foldable is supported at the lower end of the arm.
[0003]
And it was comprised so that a load receiving stand might be raised / lowered between the ground and the rear-end bottom face of a vehicle body by rotating a link mechanism up and down with a drive device.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional one, a plurality of pins such as a pin that pivotally supports both ends of the first link and the second link, a pin that pivotally supports the load receiving table on the movable arm, and a pin that can be configured to be foldable. Since each member is connected by this, there is a problem that the number of parts is increased and steps required for the mounting work are increased, and this mounting work is troublesome.
[0005]
The present invention has been made in view of the above-mentioned problems, and it is common to use pins that connect the members constituting the load receiving platform lifting / lowering device. Specifically, the pins that pivotally support the link mechanism on the load receiving table and the load receiving table can be folded freely. It is an object of the present invention to provide a load receiving table lifting / lowering device capable of reducing the number of parts and simplifying the mounting work by sharing the pins with the components.
[0006]
[Means for Solving the Problems]
Receiving platform lifting device of the present invention is a receiving platform lifting device receiving platform is provided vertically movable through a link mechanism to the rear bottom of the packing box, the receiving platform is, base and intermediate base and the tip base The mounting member is fixed on both sides of the front end of the base adjacent to the intermediate base, and is disposed along the side of the base at the upper and lower portions of the mounting member. while the previous end of the upper and lower two links constituting the link mechanism is pivotally supported respectively by the pins, folding the base and the intermediate base by a pin pivotally supporting the front end portion of the lower link at the bottom of the mounting member It is connected freely.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
1 and 2 show the configuration of, for example, a retractable load receiving table lifting device.
In the figure, reference numeral 1 denotes a cargo box mounted on a vehicle frame of a vehicle, and a cargo receiving platform elevating device 2 is provided at the rear end of the cargo box 1.
[0009]
The load receiving platform lifting / lowering device 2 is a retractable type that can be stored below the bottom face of the rear end of the cargo box 1, a fixed frame 3 fixed below the bottom face of the rear end of the load box 1, and a fixed frame 3. A slide frame 4 slidable in the front-rear direction of the load box 1 along the load frame 6, which is slidably provided on the slide frame 4 via an elevating drive means 5, and a slide frame that moves the load receiving base 6 together with the elevating drive means 5. 4, the storage position for storing the cargo box 1 below the bottom of the rear end of the cargo box 1, and the storage means 7 for arranging the cargo receiving platform 6 together with the lifting drive means 5 and the working position for projecting behind the cargo box 1. Yes.
[0010]
The fixed frame 3 includes guide rails 31 provided on the left and right below the bottom of the cargo box, a connecting member 32 that connects the front ends of the guide rails 31, and a connecting member 33 that connects the rear ends. The guide rails 31 are arranged with their openings facing inwards.
[0011]
The slide frame 4 includes a slide plate 41 opposed to the guide rail 31 and two front and rear connecting members 42 that connect the slide plates 41.
[0012]
A guide roller 43 is provided on the outer surface of the slide plate 41 of the slide frame 4, and the guide roller 43 is fitted into the guide rail 31 of the fixed frame 3 so as to be able to roll.
[0013]
The raising / lowering drive means 5 is interposed between a rotation shaft 51 pivotally supported on the rear end portion of the slide plate 41 of the slide frame 4 and between the rear end portion of the slide plate 41 and the load receiving platform 6. The tension arm 52 and the compression arm 53, and the elevating cylinder 54 that drives the rotation shaft 51 to rotate.
[0014]
The elevating cylinder 54 is supported by a mounting member 44 fixed at 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 via a bracket 511. The rotation shaft 51 is rotated in both forward and reverse directions by the expansion / contraction operation of the expansion / contraction rod 541.
[0015]
One end portion (base end portion) of the tension arm 52 is provided integrally with the rotating shaft 51 at both ends of the rotating shaft 51, and the other end portion (leading end portion) is provided at an intermediate portion of the load receiving platform 6. It is pivotally supported by the pin 521 (refer FIG. 2) at the upper part of the provided attachment member 61. As shown in FIG. Accordingly, the tension arm 52 rotates in the vertical direction around the rotation shaft 51 as the rotation shaft 51 rotates.
[0016]
The compression arm 53 is pivotally supported by a pin 531 (see FIG. 2) at the rear end portion of the slide plate 41 whose one end portion (base end portion) is below the rotation shaft 51, and the other end portion. The (tip portion) is pivotally supported by a pin 532 (see FIG. 2) below the mounting member 61.
[0017]
As described above, the tension arm 52 and the compression arm 53 connected between the rear end portion of the slide plate 41 and the mounting member 61 by both ends of the rotation shaft 51 and the pins 521, 531, and 532 constitute a parallel link mechanism. are doing.
[0018]
The load receiving stand 6 is configured such that three stages of a base 62, an intermediate stand 63, and a tip stand 64 can be folded.
[0019]
As described above, the attachment member 61 is fixedly attached to the tip end portion of the base 62 (rear side with respect to the cargo box 1), with the other end portions of the tension arm 52 and the compression arm 53 being pivotally supported.
[0020]
As shown in FIGS. 3 and 4, the mounting member 61 is fixed to the side plate front end 621 of the base 62 by welding or the like in a state of protruding upward from the side plate front end 621. The top and bottom of the mounting member 61, mounting holes 611 are formed respectively, the same size of the mounting hole 622 is coaxially with the mounting hole 61 1 in the side plate front end portion 621 corresponding to the lower portion of the mounting hole 611 Is formed. That is, the attachment member 61 and the side plate front end 621 are penetrated by the attachment holes 611 and 622.
[0021]
The other end portion of the tension arm 52 is pivotally supported by the mounting member 61 by the pin 521 through the mounting hole 611 at the upper portion of the mounting member 61, and the mounting hole 611 at the lower portion of the mounting member 61 and the front end portion of the side plate. The other end portion of the compression arm 53 is pivotally supported by the mounting member 61 by the pin 532 as described above through the mounting hole 622 of 621.
[0022]
Further, the base end portion of the intermediate stand 63 is pivotally supported by the pin 532 on the tip end portion of the base stand 62. That is, one pin 532 is shared by the connection between the base 62 and the intermediate base 63 and the pivot of the other end of the compression arm 53.
[0023]
Further, the distal end portion of the intermediate platform 63 and the proximal end portion of the distal platform 64 are pivotally supported by pins 65.
[0024]
The base 62, the intermediate base 63, and the tip base 64 pivotally supported by the pins 532 and 65 are arranged to be folded on the intermediate base 63 by rotating the tip base 64 upward, and the tip base 64 is folded. By rotating the intermediate base 63 upward and folding it on the base 62, the intermediate base 63 and the tip base 64 are arranged in a state of being folded in three stages on the base 62 as a whole.
[0025]
Further, by rotating the intermediate base 63 and the tip base 64 from the base 62 in the reverse operation to the above, the intermediate base 63 and the front base 64 are extended from the base 62 to the rear, The base 62, the intermediate base 63, and the tip base 64 are arranged on substantially the same plane.
[0026]
Further, a tire stopper 66 is provided at the tip of the tip base 64. The tire stopper 66 has a base end portion rotatably provided at the distal end of the distal end base 64 via a hinge 661, and is held on substantially the same plane extending rearward from the distal end base 64, and the distal end. It is configured to be foldable on the tip of the base 64.
The tire stopper 66 is provided with a hook 67 that holds the tire stopper 66 at a position in the middle of rotation, that is, at a position erected upward at a predetermined angle. The tire stopper 66 is held at this position to receive the cargo. The fall of the thing mounted on the base 6 can be prevented.
[0027]
The storage means 7 is for moving the slide frame 4 back and forth along the guide rail 31. The storage cylinder 71 fixed to the fixed frame 3 and the distal end of the telescopic rod 711 of the storage cylinder 71 are provided. And a wire 72 stretched between the fixed frame 3 and the slide frame 4.
[0028]
The storage cylinder 71 has a proximal end fixed to the fixed frame 3 and is horizontally disposed so that the telescopic rod 711 extends and contracts in the front-rear direction.
[0029]
A pair of left and right pulleys 712 and 713 are provided at the distal end of the telescopic rod 711 independently and rotatably.
[0030]
As shown in FIG. 1, first, one end of the wire 72 is fixed to the vicinity of the storage cylinder 71, and a middle portion is attached to one pulley 712 provided on the telescopic rod 711 substantially parallel to the storage cylinder 71. After being wound from the lower part to the upper part and folded back, it is folded back to the rear side again by a folding roller (not shown) provided on the connecting member 42 on the front side of the slide frame 4 via a bracket. The connecting member 42 is folded forward by a folding roller (not shown) provided via a bracket, wound around the other pulley 713 from the upper part to the lower part, and then folded backward again. It is fixed to the connecting member 33 at the rear end.
[0031]
In this manner, the wire 72 is stretched between the fixed frame 3 and the slide frame 4 via the pulleys 712 and 713 provided on the telescopic rod 711, so that the retractable cylinder 71 can be expanded and contracted back and forth. The slide frame 4 is moved back and forth, so that the load receiving platform 6 and the lifting drive means 5 folded together with the slide frame 4 are placed at the storage position for storing the load box 6 below the bottom surface of the packing box and at the work position shown in FIGS. Can be made.
[0032]
Next, the outline | summary of operation | movement of the retractable receiving stand raising / lowering apparatus comprised in this way is demonstrated.
[0033]
First, when the cargo is not unloaded by the load receiving platform 6 such as when the vehicle is traveling, the telescopic rod 711 of the storage cylinder 71 is retracted and the slide frame 4 is moved to the front end side of the fixed frame 3. The load receiving platform 6 and the lift drive means 5 are arranged at the storage position below the bottom of the rear end of the load box 1.
[0034]
When loading / unloading the load by the load receiving platform 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. The driving means 5 is arranged at the work position. Thereby, the load receiving platform 6 and the link mechanism of the raising / lowering drive means 5 are arrange | positioned in the state protruded back from the rear end of the cargo box 1. FIG.
[0035]
Next, the base 62 and the intermediate base constituting the load receiving base 6 are sequentially rotated about the intermediate base 63, the tip base 64, and the pins 532 and 65 of the load receiving base 6 folded at the working position. 63 and the front stand 64 are arranged on the substantially same plane and behind the rear end of the packing box 1.
[0036]
In this state, the elevating cylinder 54 of the elevating drive means 5 is expanded and contracted, whereby the tension arm 52 is rotated up and down through the rotating shaft 51, and the load receiving platform 6 is moved between the ground and the packing box along with the rotating operation. Lift up and down between the bottom of 1 and unload the load.
[0037]
In the present embodiment, the retractable load receiving table lifting device has been described. However, the present invention can be applied not only to the retractable load receiving table lifting device but also to all load receiving table lifting devices that are lifted and lowered by a link mechanism.
[0038]
【The invention's effect】
As described above, according to the present invention, the load receiving base is configured to be foldable into three stages of the base, the intermediate base, and the tip base, and the mounting members are fixed on both sides of the tip of the base adjacent to the intermediate base. and setting, while each pivoted by pins each preceding end of the upper and lower two links constituting the arranged link mechanism along the side of the base to the top and bottom of the mounting member, the lower link A pin that pivotally supports the tip of the lower link to the tip of the base via the mounting member by connecting the base and the intermediate base in a foldable manner by a pin that pivots the tip to the bottom of the mounting member ; It is possible to share a pin that foldably connects the base and the intermediate base, thereby reducing the number of parts and simplifying the mounting operation.
[Brief description of the drawings]
FIG. 1 is a plan view showing an overall configuration of a cargo receiving table lifting device.
FIG. 2 is a side view showing an overall configuration of a cargo receiving table lifting device.
FIG. 3 is a side view showing a configuration of an attachment member provided on the base of the load receiving table.
FIG. 4 is a front view showing a configuration of an attachment member provided on a base of the cargo receiving table.
[Explanation of symbols]
52 tension arm 53 compression arm 532 pin 6 load receiving table 61 mounting member 62 base 63 intermediate base 64 tip base

Claims (1)

In the load receiving platform lifting device in which the load receiving platform is movably raised and lowered via a link mechanism on the bottom end bottom surface of the packing box ,
The load receiving base is configured to be foldable in three stages of a base, an intermediate base, and a tip base, and mounting members are fixed on both sides of the tip of the base adjacent to the intermediate base. lower bets on one of the previous end of the upper and lower two links constituting the link mechanism are arranged along the side of the base are pivotally supported respectively by pins, mounting a leading end portion of the lower link member A load receiving platform elevating device characterized in that the base and the intermediate platform are foldably connected to each other by a pin pivotally supported on the base .

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