JP3708697B2 - Receiving base fixing device of retractable receiving base lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retractable load receiving / lifting device in which the load receiving platform and the lifting / lowering driving means are configured to be retractable below the bottom of the cargo box. The present invention relates to a load receiving table fixing device for fixing a load receiving table.
[0002]
[Prior art]
Conventionally, as a retractable load receiving / lifting device for storing a load receiving table provided at the rear end of the packing box so as to be movable up and down, it is arranged below the bottom of the packing box with the loading receiving table folded. In addition, the load receiving table is fixed at the retracted position by a fixing device that presses the load receiving table from above or holds the edges, thereby preventing the load receiving table from being lifted by vibration during traveling.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional apparatus, it is necessary to separately perform an operation for fixing the load receiving table, and there is a high risk of forgetting to operate or an operation, and there is a problem that the configuration is complicated by the fixing device as well as being unreliable. there were.
[0004]
The present invention has been made in view of the above-described problems, and can be used to automatically fix a load receiving base when a slide frame is slid to a storage position, and to provide a simple structure for a retractable load receiving base lifting apparatus. An object of the present invention is to provide a receiving stand fixing device.
[0005]
[Means for Solving the Problems]
The load receiving table fixing device of the retractable load receiving device lifting / lowering apparatus of the present invention has a fixed frame fixed below the bottom of the load box, a slide frame slidably provided on the fixed frame, and can be folded on the slide frame. A load receiving table is provided so as to be movable up and down via a lifting drive means having a link mechanism, and the slide frame is put together with the lifting drive means and the load receiving table by a storing means interposed between the fixed frame and the slide frame. In the retractable load receiving and lifting device configured to be retractable under the bottom of the fixed frame, a fixing device that fixes the folded load receiving base when the slide frame slides to the storage position is provided on the fixed frame side. The fixing device has a square-shaped angle with its opening facing backwards, and it folds when the loading platform is placed in the retracted position. In which the front end portion of the receiving platform are arranged to engage the opening of the angle.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0007]
4 and 5 show the configuration of the retractable load receiving table lifting device.
In the figure, reference numeral 1 denotes a cargo box mounted on a vehicle frame of a vehicle, for example, and a cargo receiving platform elevating device 2 is provided at the rear end of the cargo box 1.
[0008]
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.
[0009]
The fixed frame 3 is composed of guide rails 31 provided on the left and right below the bottom of the cargo box, and connecting members 32 and 33 for connecting the front and rear ends of the guide rails 31, The openings are arranged inwardly.
[0010]
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.
[0011]
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.
[0012]
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.
[0013]
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.
[0014]
One end of the tension arm 52 is provided integrally with the rotary shaft 51 at both ends of the rotary shaft 51, and the other end is provided above an attachment member 61 provided in the middle of the load receiving platform 6. It is pivotally supported by a pin 521 (see FIG. 5). Accordingly, the tension arm 52 rotates in the vertical direction around the rotation shaft 51 as the rotation shaft 51 rotates.
[0015]
The compression arm 53 is pivotally supported by a pin 531 (see FIG. 5) at the rear end portion of the slide plate 41 whose one end portion is below the rotation shaft 51, and the other end portion is the mounting member 61. Is pivotally supported by a pin 532 (see FIG. 5).
[0016]
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.
[0017]
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.
[0018]
As described above, the mounting member 61 on which the other ends of the tension arm 52 and the compression arm 53 are pivotally fixed is fixed to the distal end portion of the base 62 (the rear side with respect to the cargo box 1). The base end portion of the intermediate base 63 is pivotally supported by a pin 532 that pivotally supports the other end portion of the arm 53 on the mounting member 61.
[0019]
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.
[0020]
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.
[0021]
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.
[0022]
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.
[0023]
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.
[0024]
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.
[0025]
A pair of left and right pulleys 712 and 713 are provided at the distal end of the telescopic rod 711 independently and rotatably.
[0026]
As shown in FIG. 4, 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 rear connection member 33.
[0027]
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 moves back and forth, whereby the load receiving platform 6 and the lifting drive means 5 folded together with the slide frame 4 are stored below the bottom surface of the load box and the operation shown in FIGS. 4 and 5. Position.
[0028]
Here, as shown in FIG. 1, the fixed frame 3 is provided with a fixing device 8 that fixes the load receiving platform 6 when the slide frame 4 is slid to the storage position. As shown in FIGS. 2 and 3, the fixing device 8 includes an L-shaped stay 81, and an angle 82 of a “<” shape when viewed from the state of FIG. It is composed of.
[0029]
The stay 81 has a base end fixed to the guide rail 31 of the fixed frame 3, and an angle 82 provided on the inner side of the distal end of the stay 81 is disposed in a state protruding inward from the guide rail 31. The angle 82 is arranged so that the opening faces rearward and faces the load receiving table 6 when the load receiving table 6 is stored.
[0030]
Specifically, when the load receiving stand 6 is stored, the folded portion 6a of the folded intermediate stand 63 and the tip stand 64 is arranged to engage with the opening of the angle 82. Thus, the vertical movement of the entire load receiving platform 6 is fixed, and the vertical vibration is prevented.
[0031]
That is, simply by sliding the slide frame 4 to the storage position, the load receiving platform 6 is automatically engaged with the angle 82.
[0032]
Next, the operation of the retractable load receiving table lifting apparatus configured as described above will be briefly described.
[0033]
First, when the cargo is not unloaded by the load receiving platform 6 such as when the vehicle is running, the telescopic rod 711 of the storage cylinder 71 is retracted and the slide frame 4 is slid to the front end side of the fixed frame 3. The folded load receiving platform 6 and the lifting drive means 5 are arranged at the storage position below the bottom of the rear end of the load box 1. At this time, the folded portion 6 a between the intermediate platform 63 and the tip platform 64 of the load receiving platform 6 automatically engages with the angle 82 of the fixing device 8 as the slide frame 4 slides to the storage position.
[0034]
By automatically engaging the receiving platform 6 with the fixing device 8 in this manner, the receiving platform 6 can be stably fixed at the storage position only by the above-described storing operation without separately performing the fixing operation of the receiving table. It is possible to reliably prevent lifting due to up and down vibration during traveling.
[0035]
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.
[0036]
Next, the intermediate base 63 and the tip base 64 of the load receiving base 6 folded at the work position are sequentially rotated, so that the base 62, the intermediate base 63 and the front base 64 constituting the load receiving base 6 are substantially omitted. It extends on the same plane and behind the rear end of the packing box 1.
[0037]
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.
[0038]
【The invention's effect】
As described above, according to the present invention, when the slide frame is slid to the storage position, the front end portion of the folded load receiving base is engaged with the opening of the “<” shape, thereby simplifying the operation. Depending on the configuration, the receiving platform can be automatically fixed at the storing position only by the storing operation without performing a separate fixing operation of the receiving platform, and it is possible to reliably prevent lifting due to vertical vibration during traveling or the like. .
[Brief description of the drawings]
FIG. 1 is a side view showing a mounting state of a fixing device.
FIG. 2 is a side view showing a configuration of a fixing device.
FIG. 3 is a front view showing a configuration of a fixing device.
FIG. 4 is a plan view showing an overall configuration of a retractable cargo receiving table lifting device.
FIG. 5 is a side view showing the overall configuration of the retractable cargo receiving table lifting device.
FIG. 6 is a side view showing a state in which a cargo receiving table and the like are arranged at a storage position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cargo box 2 Cargo stand raising / lowering device 3 Fixed frame 4 Slide frame 5 Lifting drive means 6 Load receiving stand 7 Storage means 8 Fixing device 82 Angle (engaging member)

Claims (1)

A fixed frame is fixed below the bottom of the cargo box, a slide frame is slidably provided on the fixed frame, and a load receiving base that is foldable on the slide frame can be lifted and lowered via a lifting drive means having a link mechanism. A retractable load receiving and lifting device configured to be retractable below the bottom of the load box together with the lifting drive means and the load receiving base by the storing means interposed between the fixed frame and the slide frame. In
On the fixed frame side, there is provided a fixing device for fixing the folded cradle when the slide frame is slid to the storage position , and the fixing device has a square-shaped angle arranged with its opening facing rearward. The retractable load receiving device lifting device is characterized in that when the load receiving stand is disposed at the retracted position, the front end portion of the folded load receiving stand is disposed so as to engage with the opening of the angle . Loading platform fixing device.

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