JP4047038B2 - Loading platform structure of loading platform lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load receiving table lifting device in which a load receiving table is provided so as to be able to move up and down along a pair of left and right columns that are erected on a cargo box of a vehicle, and more specifically to a structure of the load receiving table.
[0002]
[Prior art]
Conventionally, a slider is provided in a pair of left and right columns that are erected on a cargo box of a vehicle, and a slider is connected to the slider. The slider is connected to the ground and the floor of the cargo box as the slider moves up and down. There is provided a load receiving table elevating device provided so as to be movable up and down with respect to a surface.
[0003]
[Problems to be solved by the invention]
By the way, since the above-described load receiving platform lifting apparatus is mounted on a vehicle, there has been a demand for weight reduction of the load receiving platform lifting apparatus itself in order to reduce the weight of the entire vehicle.
[0004]
And although weight reduction of such a load receiving table raising / lowering device can be achieved by making the load receiving stand made of steel conventionally made of aluminum, a load such as a load acts most on the connecting portion of the load receiving stand connected to the slider. For this reason, if the connecting portion is made of aluminum, the rigidity and strength cannot be ensured, and deformation or damage may occur, making it difficult to put it to practical use.
[0005]
In addition, it is possible to reduce the weight by using a steel material for parts that require rigidity and combining it with an aluminum material, but it is impossible to weld the aluminum material to the steel material. For this reason, there is a possibility that the structure becomes complicated when the two are combined in this way.
[0006]
The present invention has been made in view of the above-mentioned problems. The object of the present invention is to provide a load receiving table that is a combination of an aluminum material and a steel material with a simple structure and a rigid strength at the joint portion with the slider. It is an object of the present invention to provide a load receiving structure for a load receiving lift that can sufficiently secure the load receiving device.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a load receiving structure for a load receiving / lifting device, comprising a pair of left and right support columns erected at a rear end of a load box of a vehicle, sliders inserted into the support columns so as to be movable up and down, In a load receiving table lifting device constituted by a load receiving table supported by a slider and a lifting cylinder connected to each slider via a wire, the load receiving table has a load receiving table main body for placing a load on an upper surface thereof, And a support portion provided on both sides of the load receiving base body portion and supported by the slider via a guide roller and an abutment roller via a connecting member. A fixing portion interposed between the both sides and the support portion; and a hook portion formed at an upper end of the fixing portion and capable of being fitted into the upper end of the support portion. In a state where the upper end is inserted and supported from above Those which are concluded by a fastening means through the fixing portion and the support portion and the receiving platform body portion.
[0008]
According to a second aspect of the present invention, there is provided a load receiving base structure for the load receiving base lifting device, wherein the load receiving base main body and the connecting member are made of aluminum, and the support is made of steel.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 shows a load receiving table lifting device.
[0011]
The load receiving platform lifting / lowering device 1 includes a pair of left and right support columns 3 erected at the rear end of a cargo box 2 of a vehicle, sliders 4 (see FIG. 2) inserted into the support columns 3 so as to be movable up and down, and left and right It is comprised from the load receiving stand 5 supported by the lower end part of the slider 4, and the raising / lowering cylinder 7 connected with each slider 4 via the wire 6, respectively.
[0012]
Specifically, the support column 3 is formed of a hollow long body having a rectangular cross section, and the slider 4 is disposed therein.
[0013]
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 FIGS. 1 and 2, the elevating cylinder 7 is arranged at the front portion in the cross member 8 arranged between the support columns 3, and is arranged as described above by the expansion and contraction operation of the elevating cylinder 7. The slider 4 is moved up and down by feeding the wire 6 to the column 3 or drawing it from 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. That is, the support 3, the slider 4, the wire 6, and the lifting cylinder 7 constitute lifting means that lifts and lowers the load receiving platform 5.
[0017]
On the other hand, as shown in FIG. 2, a tail lamp 91 and a number plate 92 are embedded in the cross member 8 in the rear surface portion. Specifically, the cross member 8 is partitioned by a partition wall 83 into a front and rear half about a front side accommodating part 81 that accommodates the elevating cylinder 7 and a rear side accommodating part 82 that accommodates the tail lamp 91 and the number plate 92. Yes.
[0018]
The rear housing part 82 is formed by notching the rear surface of the existing cross member 8 and partitioning it with a front wall part containing the elevating cylinder 7 and a partition wall 83, as shown in FIG. A tail lamp 91 is disposed on both sides of the interior, and a number plate 92 is disposed in the center thereof. That is, the rear space in the cross member 8 that has been a space portion but has not been used in the past is effectively used. As a result, the tail lamp 91 and the number plate 92 that are conventionally provided in the lower portion of the cross member 8 can be secured at a higher height by the amount accommodated in the cross member 8.
[0019]
The partition wall 83 is not necessarily required, and a structure in which a reinforcing member or the like is provided in the cross member 8 as necessary to eliminate the partition wall 83 may be used.
[0020]
The load receiving platform 5 includes a proximal end side load receiving member 51 and a distal end side load receiving member 52 that are divided into two parts, front and rear, and the proximal end side load receiving member 51 and the distal end side load receiving member 52 are rotatable 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.
[0021]
As shown in FIGS. 4 and 5, the base end side load receiving member 51 includes a load receiving main body portion 54 as a load receiving body portion for placing a load on the upper surface thereof together with the distal end side load receiving member 52, and both sides of the load receiving main body portion 54. And a support portion 55 supported by the slider 4 on the lifting means side is connected via a connecting member 56, and the mounting structure of the cargo receiving body portion 54 and the support portion 55 is as follows. ing.
[0022]
The connecting member 56 includes a flat plate-like fixing portion 56a interposed between both sides of the cargo receiving body portion 54 and the support portion 55, and a pulling formed in a downward U shape over the entire upper end of the fixing portion 56a. It is comprised from the hanging part 56b. The load receiving main body 54 and the connecting member 56 (fixed portion 56a) are firmly connected by means such as welding.
[0023]
Therefore, in a state where the hook portion 56b is fitted and supported on the upper end portion of the support portion 55 from above, an appropriate number of the load receiving main body portion 54 and the support portion 55 are fixed by fixing bolts 57 as fastening means via the fixing portions 56a. By fastening the portions, the load receiving main body portion 54 and the support portion 55 are integrally fixed to constitute the proximal end side load receiving member 51.
[0024]
That is, both the sides of the load receiving main body 54 and the support portion 55 are fixed by the fixing bolts 57 via the connection member 56 that holds and supports the upper end portion of the support portion 55 by the hook portion 56b. Due to the above, sufficient fixing strength can be obtained even if the number of fixing points by the fixing bolt 57 is reduced.
[0025]
By configuring the base end side load receiving member 51 in this way, the load receiving main body portion 54 and the support portion 55 are sufficiently provided even if the load receiving main body portion 54 and the connecting member 56 are made of aluminum and the support portion 55 is made of steel. It can be integrated with sufficient strength. In addition, since the support portion 55 that is the coupling portion with the slider 4 and to which the load is most applied is made of steel, the rigidity strength of the load receiving platform 5 can be sufficiently secured and the weight can be reduced. Further, the tip side load receiving member 52 is also made of aluminum in the same manner as the load receiving main body 54, so that the weight of the entire load receiving platform 5 can be further reduced.
[0026]
As shown in FIGS. 2 and 6, the support portion 55 has a guide groove 55 a formed in the front-rear direction on the outer surface thereof, and a bracket 41 is disposed to protrude from the lower end portion of each slider 4 to the rear of the column 3. A first guide roller 42 provided at the lower end of the bracket 41 is disposed in the guide groove 55a so as to roll freely. 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.
[0027]
The contact roller 43 provided at the lower end of the slider 4 is slid rearward from a storage position (see FIG. 2), which will be described later, to a work position (see FIG. 6) where it protrudes rearward. When arranged, the base end portion of the support portion 55 is supported, and the load receiving platform 5 is held in a horizontal state in combination with the support from below by the first guide roller 42. At this time, the first guide roller 42 is disposed at the front end position of the guide groove 55a.
[0028]
Further, a second guide roller is provided at the base end portion of the support portion 55 (not shown). The second guide roller 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 part of the cargo box 2, and the load receiving platform 5 is attached to the slide rail 21 through the second guide rollers. It is possible to move smoothly along.
[0029]
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 slides to the rear of the slide rail 21. The front-end side load receiving member 52 folded and folded is horizontally deployed on the extension of the base-end side load receiving member 52 and is moved up and down between the ground and the floor surface of the load box 2 and arranged at a work position B shown in FIG. can do.
[0030]
Incidentally, a tuning mechanism 10 shown in FIG. 7 is provided between the load receiving platform 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 A and the work position B as described above. It is comprised by the tuning wires 11 and 12 as two sets of tuning cord bodies which are set, and each tuning wire 11 and 12 is stretched as follows.
[0031]
One tuning wire 11 is fixed to a mounting member 45 connected to one slider 4 on the upper side in FIG. 7 and the middle part thereof is guided forward (to the left in FIG. 7). After being wound around a sheave 13 provided on one side of the base end side load receiving member 51 (upper side in FIG. 7), folded back, and guided to the front end side of the base end side load receiving member 51 It is wound around a sheave 14 provided on one side near the distal end of the base end side load receiving member 51 and guided to the other side portion (lower side in FIG. 7) of the base end side load receiving member 51. It is wound around the provided sheave 15 and the other end is fixed to the mounting member 46 of the other slider 4.
[0032]
One end of the other tuning wire 12 is fixed to the mounting member 46 connected to the other slider 4 on the lower side in FIG. 7, and the middle part is guided forward (left side in FIG. 7), The base end side load receiving member 51 is wound around a sheave 16 provided on the other end portion of the base end (lower side in FIG. 7), folded back, and guided to the front end side of the base end side load receiving member 51. Later, the base end side load receiving member 51 is wound around the sheave 17 provided on the other side near the front end and guided to one side portion (upper side in FIG. 7) of the base end side load receiving member 51. It is wound around a provided sheave 18 and the other end is fixed to an attachment member 45 of one slider 4.
[0033]
The above-described tuning wires 11 and 12 and the sheaves 13 to 18 are arranged using, for example, the bottom space portion of the base-end side cargo receiving member 51.
[0034]
Further, a cover material C is connected to the rear surface 31 of the support column 3. The cover material C is used to cover the bracket 41 that protrudes rearward from the rear surface 31 of the support column 3. The cover material C has the same lateral width as the lateral width of the support column 3, and substantially the same longitudinal width as the projecting length of the bracket 41. It is formed in a hollow long body having a rectangular cross section. That is, the cover material C is disposed on the rear extension of each column 3 so as to be integrated with the column 3. On the rear surface of the cover material C, a notch groove C1 is formed for allowing the bracket 41 to move up and down as the slider 4 moves up and down.
[0035]
By covering the bracket 41 protruding from the support column 3 with the cover material C in this way, the bracket 41 can be protected from damage and the like, and the overall appearance of the apparatus can be refreshed, thereby improving the design. be able to.
[0036]
Next, operation | movement of the load receiving table raising / lowering apparatus 1 comprised in this way is demonstrated.
[0037]
As shown in FIG. 2, in a state where the load receiving platform 5 is disposed at the storage position A, 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 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 55a. Thus, it is arranged at the work position B protruding rearward of the packing box 2.
[0038]
When the load receiving platform 5 is slid from the storage position A to the working position B in this manner, both sides of the load receiving platform 5 are moved against the guide rail 21 by the action of the two sets of tuning wires 11 and 12 constituting the tuning mechanism 10. It slides in synchronization with the left and right without shifting back and forth. Thereby, the load receiving stand 5 can be smoothly slid through the first guide roller 42 and the second guide roller.
[0039]
Next, the front end side load receiving member 52 of the load receiving platform 5 folded at the work position B 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.
[0040]
When the cargo loading / unloading operation is completed, the cargo receiving platform 5 is folded by the operation reverse to the above-described operation, and the bag is placed in the storage position A by being pushed downward from the rear of the cargo box 2. Also at this time, the receiving mechanism 5 can be smoothly slid through the first guide roller 42 and the second guide roller and placed in the storage position A by the synchronization mechanism 10.
[0041]
By storing the load receiving platform 5 in the front and rear two in the folded state in the front and rear in this manner, the storage space before and after the rear lower portion of the load box 2 for storing the load receiving platform 5 is stored. 5 can be reduced by the amount of folding. For this reason, due to the reduction of the storage space, it is possible to mount on a small truck that could not be mounted due to space limitations.
[0042]
Further, since the tail lamp 91 and the number plate 92 are embedded in the rear surface of the cross member 8 and the height positions of the tail lamp 91 and the number plate 92 are increased, the load receiving base 5 is folded by this amount. Even when the vertical width is increased, this thickness can be absorbed, and thereby the ground height of the load receiving platform 5 at the time of storage can be ensured more than before.
[0043]
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.
[0044]
For example, in the present embodiment, the description has been given of the case where the load receiving table 5 is manually slid between the storage position A and the work position B. And the load receiving platform 5 may be slid by this actuator.
[0045]
Although the description has been given with respect to the structure in which the load receiving base 5 is folded in half, the load receiving base 5 is not limited to two, but may be a so-called single piece that is not a folding type, and the main body portion of this single piece is made of aluminum. That's fine. Moreover, you may comprise so that the load receiving stand 5 may be folded in three or more.
[0046]
Further, the load receiving platform 5 is not limited to be stored below the rear portion of the cargo box 2 but is provided so as to be pivotable upward with respect to the slider 4 so as to be stood and stored along the rear wall of the cargo box 2. It can be applied to the received cradle.
[0047]
Moreover, although the raising / lowering means demonstrated the mechanism which raises / lowers the load receiving stand 5 along the support | pillar 3, it is not restricted to this, You may raise / lower the load receiving stand by a parallel link mechanism.
[0048]
【The invention's effect】
As described above, according to the load receiving platform structure of the load receiving platform lifting apparatus of the present invention, the load receiving platform main body and the support are fixed to each other while the hooking portion is fitted and supported on the upper end of the support from above. By fastening with the fastening means via, the load receiving body main body part and the support part can be integrated with sufficient strength. In addition, the support part, which is the coupling part with the slider and which is the most loaded, is made of steel, and the other parts of the load receiving base are made of aluminum, so that the rigidity of the load receiving base can be sufficiently secured and lighter. Can be achieved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a load receiving table lifting device of the present invention.
FIG. 2 is a partial cross-sectional side view showing the load receiving table lifting device disposed in the storage position.
FIG. 3 is a front view showing a load receiving table lifting device arranged at a storage position.
FIG. 4 is a front view showing a structure of a proximal end side load receiving member.
FIG. 5 is a plan view showing a receiving platform.
FIG. 6 is a partial cross-sectional side view showing the load receiving table lifting device arranged at the work position.
FIG. 7 is a schematic diagram showing a configuration of a tuning mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Loading stand raising / lowering device 2 Loading box 3 Support | pillar 4 Slider 5 Loading receiving stand 51 Base end side receiving member 52 Front end side receiving member 54 Load receiving main-body part (load-receiving body main-body part)
55 Supporting part 56 Connecting member 56a Fixing part 56b Hooking part 57 Fixing bolt (fastening means)

Claims (2)

A pair of left and right columns that are erected at the rear end of the cargo box of the vehicle, a slider that is inserted into the column so as to be movable up and down, a load receiving table that is supported by the left and right sliders, and a wire to each slider. In the load receiving table lifting apparatus constituted by the connected lifting cylinders , the load receiving table includes a load receiving body main body for placing a load on an upper surface thereof , a guide roller and a guide roller provided on both sides of the load receiving main body. A support portion supported via a contact roller is connected via a connecting member, and the connecting member includes a fixing portion interposed between both sides of the load receiving table main body portion and the support portion. A hook part formed at the upper end of the fixed part and capable of being fitted into the upper end of the support part. The support part and the load receiving stand in a state where the hook part is fitted and supported on the upper end part of the support part from above. Hands fastened to the main body part via the fixed part Receiving platform structure of receiving platform lifting device, characterized in that it is concluded by. The load receiving base lifting / lowering device load receiving base structure according to claim 1, wherein the load receiving main body and the connecting member are made of aluminum, and the support is made of steel.

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