JP3938656B2 - The load receiving platform of the load receiving platform lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load receiving table used in a load receiving table lifting device mounted on a vehicle such as a truck.
[0002]
[Prior art]
Conventionally, in order to facilitate the loading and unloading work of a cargo, for example, a loading platform lifting device has been mounted at the rear of a truck, and the loading surface of the loading platform lifting device is a striped steel plate. The striped steel plate is supported by a pair of fork-shaped stiffeners made of steel. However, this type of receiving platform has a drawback that it is heavy but heavy. In view of this, there has been provided a structure in which a plurality of plate-shaped hollow mold members made of aluminum alloy are connected in parallel to form a cargo receiving surface.
[0003]
[Problems to be solved by the invention]
By the way, in the load receiving table elevating device, a method of raising and lowering the load receiving table by a pair of elevating arms composed of parallel links (rotating elevating method), and elevating columns are erected on both right and left ends of the rear part of the load box of the vehicle There are two types of systems (vertical lifting system) in which a runner supported by the lifting column is supported by a wire.
With regard to the former rotary lifting system, the components such as the lifting arm are always positioned below the floor surface of the cargo box of the vehicle, so there is no possibility that the loading and unloading of the cargo will be hindered by the components. . For this reason, the distance between the pair of lifting arms can be made narrower than the vehicle width, and the distance between the pair of stiffeners connected to the lifting arms can also be narrowed corresponding to the distance between the lifting arms. Therefore, it is possible to support the intermediate portion in the width direction of the load receiving table by the stiffener, and even the load receiving table using the hollow mold material can suppress the bending of the hollow mold material by the stiffener. Therefore, a sufficient loading capacity can be obtained.
[0004]
However, in the latter vertical lifting system, the lifting column, which is a component of the latter, always protrudes above the floor of the packing box, so that it does not hinder the loading and unloading of the packing box. Need to be placed in. For this reason, the space | interval of a pair of stiffeners connected with a runner cannot be narrowed, and only the right and left ends of the load receiving platform can be supported by the stiffeners. Therefore, there is a problem that a sufficient load capacity cannot be obtained because the span for supporting the load receiving table becomes large and the intermediate portion of the load receiving table using the hollow mold material is greatly bent.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a load receiving platform for a load receiving platform lifting / lowering device that can obtain a sufficient strength while reducing the weight and can increase the loading capacity.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a load receiving platform lifting apparatus according to the present invention forms a part of a load receiving platform lifting apparatus attached to a vehicle, and connects a plurality of aluminum alloy plate-shaped hollow mold members in parallel in the front-rear direction. It is a load receiving table forming a surface, and each hollow mold member has a recessed portion and a protruding portion for fitting at the front and rear ends, and is surrounded by the recessed portion and the protruding portion, and an upper portion and a bottom portion. in what has, both end portions of the left and right direction of the hollow member, is placed on the upper surface of the pair of vertical stiffeners made of steel, each of the hollow interior of a plurality of said hollow member, the horizontal of steel stiffener In a state of being inserted between the pair of vertical stiffeners, both left and right ends of each horizontal stiffener are connected to the vertical stiffener, and the hollow mold member is supported by a frame formed by the vertical stiffener and the horizontal stiffener. Doing The characters (claim 1). According to the load receiving table thus configured, a strong frame made of steel can be configured by the pair of vertical stiffeners and the plurality of horizontal stiffeners whose both ends are connected to the vertical stiffener. For this reason, it is possible to prevent the pair of vertical stiffeners from being bent in a direction in which the pair of vertical stiffeners approach each other due to the load applied to the load receiving surface, and to effectively prevent the hollow mold material through which the horizontal stiffeners are inserted by the vertical stiffeners. Can be reinforced.
[0006]
The cross-sectional shape of the horizontal stiffener is preferably a groove shape (Claim 2), whereby the hollow mold material can be reinforced more strongly while suppressing an increase in weight to a minimum.
In this case, the horizontal stiffener is preferably bolted to the vertical stiffener together with the hollow mold material with the opening side facing upward (Claim 3). In this case, the horizontal stiffener and the hollow mold material are It can be easily and firmly fixed to the vertical stiffener.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a side view showing a load receiving table lifting / lowering device 1 equipped with a load receiving stand A according to an embodiment of the present invention. In this load receiving platform lifting / lowering device 1, a pair of rectangular tube-shaped lifting columns 11 are erected on both right and left ends of the rear portion of the vehicle's cargo box B, and a rectangular tube-shaped runner 12 can be raised and lowered inside the lifting column 11. The load receiving stand A is connected to the runner 12 and the wire 13 connected to the runner 12 is fed and taken up by a hydraulic cylinder (not shown) to receive the load together with the runner 12. The table A can be raised and lowered along the lifting column 11. Further, when the load receiving platform A reaches the descending end, the link mechanism 14 is rotated in the clockwise direction in FIG.
[0008]
The load receiving table A is formed by connecting a plurality of aluminum alloy hollow molds 2 in parallel to form a load receiving surface 3, and the hollow mold 2 is supported by a frame body 6 made of a steel vertical stiffener 4 and a horizontal stiffener 5. (See FIGS. 2 and 3).
The hollow mold 2 is a plate-like body having a hollow structure formed by extruding an aluminum alloy, and the overall length is substantially equal to the width dimension of the packing box B. Protrusion 21 for fitting to the rear end of the hollow shape member 2, the concave portion 22 for engagement is formed at the front end, also, the hollow shape member 2, as shown in FIG. 4, the convex portion 21 and concave portion 22 And a hollow interior surrounded by the upper part 2d and the bottom part 2c. Reinforcing ribs 23 are formed at predetermined intervals in the hollow interior (see FIG. 4). Further, nuts 24 are embedded in the vicinity of both ends of the hollow mold member 2, and bolt insertion holes 25 are formed in the bottom portion 2 c so as to correspond to the nuts 24.
[0009]
Each hollow member 2, the convex portion 21 and concave portion 22, are fitted respectively in the concave portion 22 and convex portion 21 of the hollow shape member 2 adjacent a protrusion 21 and a concave portion 22 in the fitting state The wires W are connected to each other by inserting the wires W through the wire holes formed therebetween. In the case of the figure, five hollow mold members 2 are connected, and each hollow mold member 2 is attached to the vertical stiffener 4 by screwing a bolt 8 through which the upper portion 4a of the vertical stiffener 4 is inserted into the nut 24. .
[0010]
An aluminum alloy top plate 26 is fitted and connected to the hollow mold 2a disposed at the rear end of the hollow mold 2 and the hollow mold 2b disposed at the proximal end is made of an aluminum alloy. The bottom plate 27 is fitted and connected. A cart stopper 26a is embedded in the top plate 26 so as to be able to stand up (see FIG. 5). Further, the predetermined ranges of the side surfaces and the upper surface end portions of the hollow mold member 2 and the top plate 26 are covered with a cover 2e having an L-shaped cross section.
[0011]
A pair of the vertical stiffeners 4 is provided corresponding to the left and right ends of the hollow mold member 2. A bracket 41 is integrated with the base end portion of the vertical stiffener 4 by welding or the like, and the vertical stiffener 4 is connected to the runner 12 via the bracket 41. The brackets 41 of the vertical stiffeners 4 are connected to each other via a cross beam 42 made of lip groove steel (C-shaped steel), and the bottom plate 27 is supported by the cross beam 42 over its entire length. (See FIGS. 2 and 5). The bottom surface of the cross beam 42 is covered with a cover 42a.
[0012]
The portion excluding the bracket 41 of the vertical stiffener 4 is configured in a substantially rectangular tube shape by combining sheet metal members (see FIG. 6), and the lower surface gradually approaches the tip side with respect to the upper surface extending in the horizontal direction. As shown, it is tapered in side view (see FIG. 3). On the upper surface of the vertical stiffener 4, both end portions of the hollow mold member 2, the top plate 26 and the bottom plate 27 are arranged. A grounding buffer member 29 projects from the lower surface of the front end of the vertical stiffener 4.
[0013]
The horizontal stiffener 5 is made of a molding material having a groove-shaped cross section, and in the case of the figure, it is inserted through the hollow interior of two hollow mold members 2 arranged at the rear end and the center. Each horizontal stiffener 5 is inserted through the hollow mold member 2 with the opening side facing upward and the bottom surface along the bottom 2c of the hollow mold member 2, and both end portions of the hollow mold member 2 are It is placed on the upper surface of the vertical stiffener 4 via the bottom 2c. Further, both end portions of each horizontal stiffener 5 are fixed to the vertical stiffener 4 together with the hollow mold material 2 by bolts 51 inserted through the bottom portion 2c of the hollow mold material 2 and the upper portion 4a of the vertical stiffener 4 (FIG. 4 and FIG. 4). (See FIG. 6). Thus, with the opening side of each horizontal stiffener 5 facing upward, both ends of the horizontal stiffener 5 and both ends of the hollow mold 2 are bolted to the vertical stiffener 4 at the same time. It can be easily fixed to the lateral stiffener 5 with good integrity. In particular, since both ends of the bottom portion 2 c of the hollow mold member 2 are sandwiched between the vertical stiffener 4 and the horizontal stiffener 5, the hollow mold member 2 can be firmly fixed to the vertical stiffener 4. The upper end portion of the horizontal stiffener 5 is in contact with or close to the upper portion 2 d of the hollow mold 2.
[0014]
In the load receiving platform A having the above configuration, the pair of vertical stiffeners 4 and the horizontal stiffeners 5 connected to both ends of the vertical stiffener 4 are both made of steel. Therefore, the strength of the frame 6 constituted by these is extremely strong. It will be a thing. For this reason, it is possible to prevent the pair of vertical stiffeners 4 from being bent in a direction approaching each other due to the load applied to the load receiving surface 3, and the hollow stiffener 2 through which the horizontal stiffener 5 is inserted is connected to the vertical stiffener. 4 can be reinforced. For this reason, each hollow mold material 2 can be supported firmly. Moreover, since the cross section of the lateral stiffener 5 has a groove shape, the hollow mold member 2 can be effectively reinforced while suppressing an increase in weight to a minimum. Therefore, it is possible to effectively increase the loading capacity while reducing the weight of the receiving platform A.
Further, since each horizontal stiffener 5 is inserted into the hollow mold member 2, the horizontal stiffener 5 interferes with foreign matters such as stones on the road surface, so that the load receiving platform A can be damaged or cannot be lowered to the grounding position. Thus, it is possible to prevent the load from becoming difficult to be placed on the load receiving stand A and to improve the appearance of the load receiving stand A.
[0015]
In the above-described embodiment, the case where the two horizontal stiffeners 5 are inserted through the two hollow mold members 2, respectively, is inserted through the other hollow mold members 2 according to the required loading capacity. May be implemented. In addition to the groove shape, the cross-sectional shape of the lateral stiffener 5 is a cylindrical shape (see FIG. 7A) or a shape in which a pair of ribs 5b are erected on the flat plate 5a (see FIG. 7B). Etc., and can be implemented in various shapes.
[0016]
【The invention's effect】
As described above, according to the load receiving platform of the load receiving platform lifting apparatus according to claim 1, the aluminum alloy hollow mold material can be firmly supported by the steel frame body including the vertical stiffener and the horizontal stiffener. The load capacity can be increased while reducing the weight.
According to the load receiving platform of the load receiving platform lifting apparatus according to claim 2, since the cross-sectional shape of the horizontal stiffener is a groove shape, it is possible to reinforce the hollow mold material more firmly while suppressing an increase in weight to a minimum. it can. For this reason, the loading capacity of the load receiving platform can be increased more effectively.
According to the load receiving platform of the load receiving platform lifting apparatus according to claim 3, since the horizontal stiffener is bolted to the vertical stiffener together with the hollow mold material with the opening side facing upward, the horizontal stiffener and the hollow mold material are connected to the vertical stiffener. Can be fixed easily and firmly.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which a load receiving table according to an embodiment of the present invention is mounted on a load receiving table lifting device.
FIG. 2 is a partially cutaway plan view of the load receiving table of the previous figure.
FIG. 3 is a partially cutaway side view of the cargo receiving platform.
FIG. 4 is a cross-sectional view of the main part of the load receiving table.
FIG. 5 is a side view of the main part of the cargo receiving stand.
FIG. 6 is a cross-sectional view showing a connection state between a vertical stiffener and a horizontal stiffener.
FIG. 7 is a cross-sectional view showing another embodiment of the vertical stiffener.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Loading platform raising / lowering device 2 Hollow mold material 3 Loading receiving surface 4 Vertical stiffener 5 Horizontal stiffener 6 Frame A Loading platform

Claims (3)

Form part of the receiving platform lifting device mounted on a vehicle, the aluminum alloy plate hollow member by connecting a plurality parallel in the longitudinal direction a receiving platform which forms a receiving surface, each of said hollow members However, it has a concave and convex portions for fitting at the front and rear ends, and has a hollow interior surrounded by the concave and convex portions and the top and bottom ,
Both ends in the left-right direction of the hollow mold member are placed on the upper surfaces of a pair of vertical stiffeners made of steel, and a horizontal stiffener made of steel is inserted into each of the hollow interiors of the plurality of hollow mold members, and the pair of vertical stiffeners is inserted. In a state of being bridged between the stiffeners, both left and right end portions of each horizontal stiffener are connected to the vertical stiffener, and the hollow mold material is supported by a frame constituted by the vertical stiffener and the horizontal stiffener. The receiving platform of the receiving platform lifting device.   The load receiving platform of the load receiving platform lifting apparatus according to claim 1, wherein a cross section of the horizontal stiffener has a groove shape.   3. The load receiving platform lifting apparatus according to claim 2, wherein the horizontal stiffener is bolted to the vertical stiffener together with the hollow mold member with the opening side facing upward.

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