JP4236385B2 - Slide mechanism in retractable load receiving device lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retractable load receiving base lifting device configured such that the load receiving side is slidable back and forth along a guide rail between a storage position below the load bed and a work position behind the load bed by a slide mechanism. The present invention relates to the structure of the slide mechanism.
[0002]
[Prior art]
Conventionally, a loading platform is provided on the loading platform via a link mechanism so as to be movable up and down by a lifting mechanism, and the loading platform side including the link mechanism and the lifting mechanism is moved between a storage position below the loading platform and a work position behind the loading platform by a slide mechanism. There is provided a retractable cradle lifting device configured to be slidable back and forth along a guide rail.
[0003]
And the slide mechanism in this conventional retractable load receiving device elevating device is constituted by a pair of left and right or two telescopic cylinders whose both ends are connected to the load receiving side and the load receiving side.
[0004]
Specifically, in the case of a pair of left and right telescopic cylinders, they are arranged in parallel in the front-rear direction on the left and right sides in the width direction on the loading platform side and the loading platform side with a predetermined interval therebetween. In the case of the telescopic cylinder, it is arranged toward the front-rear direction at the central portion in the width direction.
[0005]
[Problems to be solved by the invention]
However, in the conventional case where a pair of left and right extension cylinders or one extension cylinder is arranged in a straight line in the front-rear direction, the installation length in the front and rear by each extension cylinder becomes longer. In addition to being restricted to avoid interference with peripheral members, the entire length of the entire apparatus is increased. This becomes more prominent when the slide stroke on the load receiving side has to be lengthened.
[0006]
In particular, when one telescopic cylinder is arranged in the front-rear direction of the central portion, for example, if a spare tire is installed at a location where the telescopic cylinder is arranged, the ground height of the spare tire becomes low and road obstacles occur. There is a high possibility of interfering with objects, and there is a problem that the space in the central portion cannot be used effectively.
[0007]
In addition, when the load receiving side is slid by a pair of left and right extension cylinders arranged in parallel, the load receiving side is caused by pressure oil pulsation that operates the two extension cylinders when the load receiving side is slid. In some cases, the left and right slides may be misaligned, which hinders smooth sliding operation.
[0008]
[Means for Solving the Problems]
The slide mechanism in the retractable load receiving device lifting apparatus of the invention according to claim 1 is provided such that the load receiving table is provided on the load table via the link mechanism so that the load receiving table can be moved up and down by the lifting means. In the slide mechanism in the retractable load receiving and lifting device configured to be slidable back and forth along the guide rail between the storage position below the load carrier and the work position behind the load carrier by the mechanism, the load carrier side and the load carrier side A pair of left and right extension cylinders are provided between the front and rear ends of the extension cylinders, and the front ends of the extension cylinders are connected to the left and right sides in the width direction on the loading platform side, and the rear ends are centered in the width direction on the loading platform side. It is connected to.
[0009]
The slide mechanism in the retractable load receiving and lifting device of the invention according to claim 2 is configured such that a spare tire is installed in a space generated in a central portion below the loading platform to which the front end of the telescopic cylinder is connected. .
[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 configuration of a slide mechanism in a retractable load receiving device lifting apparatus according to the present invention.
[0012]
In FIG. 1, reference numeral 1 denotes a loading platform mounted on a vehicle body frame 11, and a retractable loading platform lifting device 2 is provided below the rear end of the loading platform 1.
[0013]
The retractable load receiving table lifting / lowering device 2 includes an attachment member 3 provided on the vehicle body frame 11 and a load receiving stand 5 provided on the attachment member 3 via a link mechanism 4.
[0014]
The attachment member 3 is slidable in the front-rear direction along an outward U-shaped guide rail 12 disposed in the front-rear direction at the rear end portion of the vehicle frame 11. Specifically, front and rear rollers (not shown) provided on the mounting member 3 are arranged to roll in the guide rail 12, and the mounting member 3 is moved along the guide rail 12 by a slide mechanism 6 described later. By sliding, the entire retractable load receiving device lifting device 2 on the load receiving table side is configured to be slidable back and forth below the floor surface of the loading table 1.
[0015]
The link mechanism 4 includes a lower link 41 and an upper link 42. The base ends of the lower link 41 and the upper link 42 are pivotally supported on the mounting member 3 side, and the lower link 41 or the upper link 42 is moved up and down by lifting means (not shown) provided on the mounting member 3 side. It is configured to be freely rotatable.
[0016]
A pair of left and right members such as the guide rail 12, the mounting member 3, the link mechanism 4, and the lifting and lowering means described above are provided on both sides of the vehicle frame 11, so that the left and right mounting members 3 slide on the guide rail 12 in synchronization. It is connected by a connecting member 3a.
[0017]
The load receiving platform 5 includes a distal end side member 51 and a proximal end side member 52, and the distal end side member 51 and the proximal end side member 52 are connected to the proximal end side member 52 by a hinge 53. It can be folded in two on the front side.
[0018]
Brackets 55 are connected to the left and right sides of the base end portion 52 of the base end side member 52 via hinges 54, and the tip portions of the left and right upper links 42 are pivotally supported on the upper portion of the bracket 55. The front ends of the left and right lower links 41 are pivotally supported.
[0019]
That is, the base end side member 52 is also provided on the upper surface side of the bracket 55 so as to be foldable. In the retracted state shown in FIG. 1, the entire load receiving platform 5 is folded in three.
[0020]
Further, the tip of the tip side member 51 is formed in a wedge shape, and the tip is grounded without any step on the ground by tilting when the load receiving platform 5 reaches the ground.
[0021]
The retractable load receiving device elevating device 2 configured as described above has a storage position A (FIG. 1) in which the mounting member 3 is slid to the front end portion of the guide rail 12 with the slide receiving mechanism 5 folded by the slide mechanism 6. (See the solid line) and unfold the load receiving platform 5 by sliding the mounting member 3 to the rear end of the guide rail 12, and in this unfolded state, the load receiving platform 5 is moved up and down between the ground and the floor surface of the loading platform 1 It can be arranged at the work position B (see the two-dot chain line in FIG. 1).
[0022]
The above-described slide mechanism 6 includes a pair of left and right telescopic cylinders 61, 61 as shown in FIG. Specifically, each telescopic cylinder 61 is connected to the left and right side portions of the mounting stay 62 that is supported by the guide rail 12 whose front end portion is on the loading platform 1 side and extends in the width direction, and the rear end. The parts are connected to the tip of an attachment stay 63 extending rearward from the central part of the connecting member 3a on the load receiving stand 5 side. That is, each of the telescopic cylinders 61 and 61 is attached to the attachment stay 62 in a state of forming an isosceles triangle having the attachment stay 62 as a base.
[0023]
Next, the operation of the retractable cargo receiver lifting device 2 configured as described above will be described focusing on the sliding operation by the sliding mechanism 6.
[0024]
First, in order to arrange the retractable load receiving device elevating device 2 from the storage position A stored below the load carrier 2 to the working position B as shown in FIG. By the extension operation of the telescopic cylinder 61, the entire retractable load receiving device lifting device 2 slides along the guide rail 12 to the rear end side of the load carrier 2, and is disposed at the work position B as shown by a two-dot chain line in FIG. The
[0025]
At this time, as shown in FIG. 2, each of the telescopic cylinders 61 extends by pushing the central part in the width direction of the retractable load receiving device elevating device 2, so that there is no misalignment between the retractable load receiving device lifting device 2. That is, when each telescopic cylinder 61 extends, the component force at the tip of these telescopic cylinders 61 works perpendicularly to the sliding direction, so that each component force acting in the width direction of the retractable cargo receiver lifting device 2 is They will cancel each other and balance each other, so that the retractable load receiving device lifting device 2 can be smoothly moved along the guide rail 12.
[0026]
When the retractable load receiving device lifting / lowering device 2 is arranged at the work position B in this way, the proximal end side member 52 of the folded load receiving stand 5 is shown in FIG. The tip end side member 51 is omitted in the illustration with a two-dot chain line.) And the base end side member 52 is deployed so as to be on the same horizontal plane as the bracket 55. Subsequently, although not illustrated, the distal end side member 51 is rotated backward, and the distal end side member 51 is developed so as to be on the same horizontal plane as the bracket 55 and the proximal end side member 52. As a result, the load receiving platform 5 can be lifted and lowered between the ground and the floor surface of the loading platform 1 by the lifting means, and this lifting operation allows the loading and unloading work between the ground and the loading platform 1 through the load receiving platform 5. Do.
[0027]
Next, when the cargo loading / unloading operation is completed and the retractable load receiving device lifting / lowering device 2 is stored, the retractable load receiving device lifting / lowering device 2 is moved from the work position B to the storage position A by an operation reverse to the above-described operation. Deploy. That is, at the work position B, after placing the load receiving platform 5 of the retractable load receiving platform lifting / lowering device 2 at a predetermined height, the load receiving platform 5 is folded in three, and the telescopic cylinders 61 are retracted in this state. . As a result of the retracting operation of the telescopic cylinder 61, the entire retractable load receiving device elevating device 2 slides along the guide rail 12 below the load carrier 2, and is disposed at the storage position A as shown in FIG.
[0028]
At this time, since each of the telescopic cylinders 61 is retracted in such a manner that the central portions in the width direction of the retractable load receiving device lifting / lowering device 2 are pulled together, the retractable load receiving device lifting / lowering device 2 is not displaced in the right and left. That is, when each of the telescopic cylinders 61 is retracted, the component force at the tip of these telescopic cylinders 61 is perpendicular to the sliding direction as in the case of extending the telescopic cylinders 61 described above. The component forces acting in the width direction of the device 2 cancel each other and balance each other, whereby the retractable load receiving device lifting device 2 can be smoothly moved along the guide rail 12.
[0029]
Accordingly, the retractable load receiving table elevating device 2 can be smoothly moved back and forth by the slide mechanism 6.
[0030]
In addition, by arranging the telescopic cylinders 61 in an isosceles triangle shape as described above to constitute the slide mechanism 6, the longitudinal installation length by the telescopic cylinders 61 is made straight in the front-rear direction as in the prior art. Compared with the arrangement, the length can be shortened, and accordingly, restrictions for avoiding interference with peripheral members can be relaxed, and the length of the entire apparatus can be shortened.
[0031]
And the space which can install another member arises in the center part under the loading platform 1 with which the front-end part of the expansion-contraction cylinder 61 is connected by this, This space can be utilized effectively.
[0032]
As an example of using the space, a spare tire 7 can be installed as shown in FIGS. 1 and 2. Specifically, a support member 71 is fixedly provided at the center of the mounting stay 62, and the spare tire 7 is supported by the support member 71 in a suspended state.
[0033]
By installing the spare tire 7 in this manner, the telescopic cylinder 61 does not get in the way, so that the spare tire 7 is installed at a position where the ground height is increased as much as possible without interfering with the retractable load receiving device lifting device 2. be able to.
[0034]
【The invention's effect】
As described above, according to the slide mechanism of the retractable load receiving device lifting apparatus of the present invention, a pair of left and right extending cylinders are provided between the loading platform side and the load receiving platform side, and these extending cylinders have their front end portions at the loading platform. By connecting the rear end parts to the center part in the width direction on the cargo cradle side, the installation length in the front and rear by the telescopic cylinder is arranged in a straight line in the front and rear direction as before. The length of the entire apparatus can be shortened, and the length of the entire apparatus can be shortened.
[0035]
In addition, since the telescopic cylinder expands and contracts by pushing or pulling the center in the width direction on the load receiving side, the left and right sides of the load receiving side are not displaced and the load receiving side is smoothly moved along the guide rail. Can be moved to.
[0036]
Furthermore, a space where another member can be installed is created in the central portion below the loading platform to which the front end of the telescopic cylinder is connected, and this space can be used effectively as a spare tire installation section. Since the telescopic cylinder does not get in the way, the spare tire can be installed at a position where the ground height is increased as much as possible without interfering with the retractable load receiving device lifting device.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of a slide mechanism in a retractable cargo receiver lifting device of the present invention.
FIG. 2 is a partially omitted plan view showing a configuration of a slide mechanism in the retractable cargo receiver lifting device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Loading platform 12 Guide rail 2 Retractable loading platform raising / lowering device 4 Link mechanism 5 Loading platform 6 Slide mechanism 61 Telescopic cylinder 7 Spare tire

Claims (2)

A load receiving platform is provided on the loading platform via a link mechanism so as to be movable up and down by an elevating means. In the slide mechanism in the retractable load carrier lifting device configured to be slidable back and forth along the guide rail,
A pair of left and right telescopic cylinders are provided between the loading platform side and the cargo receiving platform side, and these telescopic cylinders have their front end portions connected to the left and right side portions in the width direction on the loading platform side, and the rear end portions are connected to each other. A slide mechanism in a retractable load receiving table lifting device, wherein the slide mechanism is connected to a center portion in the width direction on the load receiving table side. 2. The sliding mechanism for a retractable cargo receiver lifting apparatus according to claim 1 , wherein a spare tire is installed in a space formed in a central portion below a cargo bed to which a front end portion of the telescopic cylinder is connected.

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