JP6682325B2 - Loading platform and loading platform lifting device - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load receiving platform and a load receiving platform lifting device.

  2. Description of the Related Art An example of a loading platform elevating device mounted on a freight vehicle and used for loading and unloading luggage is described in Patent Document 1. This cargo carrier raising / lowering device is designed to raise and lower the cargo carrier between the ground and the floor of the cargo carrier behind the cargo carrier. The cradle is composed of a plurality of aluminum alloy panels (blocks) for weight reduction, and each panel is manufactured by extrusion molding. On the load receiving surface of each panel, concave portions and convex portions for preventing the luggage on the load receiving surface from slipping are formed alternately and continuously in the front-rear direction.

JP-A-7-164954

In the above-mentioned load receiving base, since the recesses and protrusions are formed during extrusion molding, these recesses and protrusions are formed long in the width direction of the load receiving base, which is the direction of extrusion molding (extrusion direction). The shape of the load receiving surface does not change in the width direction. For this reason, there is a problem that the load on the load receiving surface is difficult to slip in the front-rear direction due to the uneven portion, but is easy to slide in the width direction.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a load carrier and a load carrier lifting device that can prevent the load on the load receiving surface from sliding in the front-rear direction and the width direction. .

(1) The cargo cradle of the present invention for achieving the above object constitutes a part of a cargo cradle lifting device attached to a vehicle, and a plurality of aluminum alloy blocks formed by extrusion molding or pultrusion molding are arranged in parallel. In a load receiving table that is connected, the load receiving surface of at least one of the plurality of blocks is blasted.
According to the above-described load receiving base, since a large number of fine irregularities are irregularly formed on the load receiving surface of the block subjected to the blast treatment, it is possible to prevent the load on the load receiving surface from sliding in the front-back direction and the width direction. Can be prevented.

(2) In the load receiving base, it is preferable that the blasted block is also blasted on the back surface opposite to the load receiving surface.
In this case, when the load receiving surface of the block is slapped by the blasting process, the block is deformed so as to warp in a convex shape, but since the blasting process is also applied to the back surface of the block, the block is warped on the load receiving surface side. The warp on the side of the load receiving surface is corrected by warping in the opposite direction. As a result, the block can be prevented from being deformed even if the load receiving surface is blasted.

(3) A cargo carrier lifting device according to the present invention is a cargo carrier lifting device that is attached to a vehicle, and includes the cargo carrier of (1) or (2) above, and a lifting device that lifts the cargo carrier. There is.
According to the load receiving platform elevating device, the same operational effects as the load receiving platform are achieved.

(4) In the lifting device for a load receiving base, the load receiving base is composed of a predetermined number of the blocks and is attached to the lifting device, and a base load receiving base is formed of a predetermined number of the blocks. A front load receiving pedestal attached so as to be foldable, wherein the rear surface opposite to the load receiving surface of at least a part of the blocks of the predetermined number of the front load receiving base faces upward. It is possible to store it under the vehicle body of the vehicle in a state in which the partial cargo cradle is folded to the base cargo cradle, and among the partial blocks of the front cargo cradle, the cargo cradle is stored under the car body. It is preferable that the back surface of the block that is used as a step in this state is subjected to a blast treatment.
In this case, since the blasting process is applied to the back surface of the block of the front cargo receiving pedestal used as a step in the state where the cargo receiving pedestal is stored under the vehicle body, the worker puts his / her foot on the back surface which becomes the step. Sometimes it can prevent slipping.

  According to the present invention, it is possible to prevent the load on the load receiving surface of the load receiving platform from sliding in the front-rear direction and the width direction.

It is a side view of the goods receiving platform raising / lowering device concerning a 1st embodiment of the present invention. FIG. 3 is a side view showing a use state in which the load receiving base is slid rearward from the slide front end position (front position) of FIG. 1 to reach a predetermined slide rear end position (rear position) and then the load receiving base is expanded and lifted. It is a top view which shows the state which the slide cylinder contracted most. It is a side view of Drawing 3, (a) is a schematic side view showing a state where a slide cylinder contracted most, and (b) is a schematic side view showing a state where a slide cylinder expanded most. It is a sectional side view which shows the state which expanded the receiving stand. It is the top view which looked at the goods receiving stand of FIG. 5 from the back surface side.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[overall structure]
FIG. 1 is a side view of a loading platform lifting device according to a first embodiment of the present invention. This state represents a state in which the load receiving platform elevating / lowering device 1 is stored below the rear portion of the vehicle body 2 of the vehicle V, that is, a state in which the vehicle V can travel. On the other hand, FIG. 2 shows that the entire loading platform lifting device 1 is slid from the slide front end position (front position) of FIG. 1 to the rear of the vehicle body 2 to reach a predetermined slide rear end position (rear position), FIG. 6 is a side view showing a usage state in which the platform 19 is unfolded and lifted to load and unload cargo.

  A luggage box B is mounted on the vehicle body 2. The vehicle body 2 of the present embodiment has a chassis frame 2a and a sub frame 2b arranged so as to overlap the chassis frame 2a. The sub-frame 2b is arranged on the lower surface of the luggage box B and has a function of reinforcing the luggage box B. Below the rear end of the chassis frame 2a, a so-called underfloor stowage platform pedestal lifting device 1 is stored.

In FIG. 2, a pair of left and right fixed-side support members 3 provided in the vehicle width direction of the load receiving platform elevating device 1 are slide rails 4 that extend horizontally in the vehicle front-rear direction, and are mounted on the vehicle body 2. A plurality of (3 in this example) mounting brackets 5 and a connecting member 6 made of a square pipe that connects the front end portions of the pair of left and right slide rails 4.
The slide rail 4 and each mounting bracket 5 are fastened together by two bolts 7 and nuts (not shown) (see FIG. 1). A support plate 8 is mounted on the slide rail 4 so as to be slidable in the vehicle front-rear direction.

  The pair of left and right support plates 8 penetrates a cross member 9 formed of a square pipe extending horizontally in the vehicle width direction (note that both side ends have three stacked square pipes for reinforcement. Only one is erected.), Which are welded together. Support brackets 10 and 11 are integrally welded to the cross member 9 outside the support plate 8 in the vehicle width direction. A pair of left and right support brackets 10 and 11 are also provided.

  The lower portions of the pair of left and right support plates 8 are connected by a connecting member 12 made of a channel material (see FIG. 3). The support plate 8, the cross member 9, the support brackets 10 and 11, and the connecting member 12 constitute a movable side support member 13 slidable in the vehicle front-rear direction with respect to the fixed side support member 3.

  An auxiliary link 14 is rotatably attached to the support bracket 10 within a certain range, and an upper arm 15 and a lift cylinder (elevating drive device) 16 are rotatably attached to the auxiliary link 14. The tip of the lift cylinder 16 is connected to a predetermined position of the upper arm 15 and applies a torque to the upper arm 15 by the expansion and contraction operation. A lower arm 17 is rotatably attached to the support bracket 11. The lift cylinder 16 is, for example, a single-acting hydraulic cylinder.

  The upper arm 15 and the lower arm 17 constitute a parallel link in which a quadrangle connecting the fulcrums and the action points is a parallelogram, and the lift cylinder 16 is extended and contracted to move the tip end side up and down. The above-mentioned auxiliary link 14, upper arm 15, lift cylinder 16 and lower arm 17 are provided in a pair on the left and right, and constitute an arm type lifting device 18 for lifting the load receiving table 19.

The loading tray 19 includes a main plate (base loading tray) 191 horizontally attached to the tips of the upper arm 15 and the lower arm 17, and a sub-plate (front loading tray) foldably and unfoldably connected to the main plate 191. 192, and a connecting portion 193 that connects the main plate 191 and the sub plate 192.
The connecting portion 193 has one end rotatably connected to the leading end of the main plate 191, and the other end rotatably connected to the base end of the sub plate 192. The hinge 193a (see also FIG. 1). ) Has.

With the above configuration, the sub-plate 192 is folded on the main plate 191 during storage. Further, when the sub-plate 192 is unfolded during use, the load-bearing pedestal 19 is formed with a load-receiving surface 19a that is continuous from the upper surface of the main plate 191 to the upper surface of the sub-plate 192. Loads to be loaded and unloaded from the load box B are placed on the load receiving surface 19a.
In addition, although the cargo receiving table 19 is composed of two plates 191, 192, it may be composed of only one plate or may be composed of three or more plates.

  When the lift cylinder 16 is driven to expand and contract with the load receiving surface 19a thus configured, the load receiving base 19 is moved to the raised position where the floor surface b1 of the load box B and the load receiving surface 19a are at substantially the same height position ( It is possible to move up and down between a position (upper position in FIG. 2) and a grounding position (lower position in FIG. 2) in contact with the ground. As a result, by raising and lowering the load receiving base 19 at the rear of the luggage box B (on the right side in FIG. 2), it is possible to load and unload luggage on the luggage box B of the vehicle V.

  A roller attachment plate 20 is attached to each of the pair of left and right support plates 8 so as to project rearward, and a guide roller 21 is rotatably attached to the rear end thereof. The tip of the sub plate 192 can be placed on the guide roller 21.

  Next, the slide cylinder (forward / backward drive device) 22 that slides (moves back and forth) the load receiving platform elevating device 1 between the front position and the rear position will be described. FIG. 3 is a plan view showing a state where the slide cylinder 22 is contracted most. 4A is a schematic side view showing a state where the slide cylinder 22 is contracted most, and FIG. 4B is a schematic side view showing a state where the slide cylinder 22 is expanded most.

  In FIG. 3, the slide cylinder 22 is composed of a pair of left and right cylinders 23 arranged between the left and right slide rails 4 in the vehicle width direction. The cylinder 23 is, for example, a double-acting hydraulic cylinder. The cylinder main bodies 24 of the left and right cylinders 23 are stacked with their front and rear ends arranged in opposite directions to each other, and are integrally connected by a pair of front and rear joint portions 25.

  3 and 4, in the cylinder 23 on the right side (the upper side in FIG. 3), a boss portion 26a integrally formed at the tip end portion of the piston rod 26 is attached to a mounting plate 27 by a pin 28. The mounting plate 27 is fixed to a substantially middle portion of the connecting member 6 in the vehicle width direction. In the cylinder 23 on the left side (lower side in FIG. 3), the boss portion 26a of the piston rod 26 is attached by a pin 31 to an attachment plate 30 fixed to an attachment base 29 extending in the vehicle front-rear direction.

  The mounting base 29 has an upper mounting base 29a having the mounting plate 30 fixed to the upper surface thereof, a vehicle front-rear direction shorter than the upper mounting base 29a, and a bolt 32 at a lower portion of the upper mounting base 29a. The lower mount 29b is fixed by a nut (not shown). The rear end of the lower mount 29b is fixed to a substantially middle portion of the connecting member 12 in the vehicle width direction. The front end portion of the lower mount 29b is fixed to a substantially middle portion of the cross member 9 in the vehicle width direction.

  With the above configuration, when the load receiving table 19 stored in the state shown in FIG. 1 is used, the slide cylinder 22 is slid backward by the extension operation and retracted to the rear position. Next, when the lift cylinder 16 is contracted, the upper arm 15 and the lower arm 17 rotate downward as shown by the solid line in FIG. 2, and the main plate 191 lands. At this time, the main plate 191 is horizontal, while the tip of the sub plate 192 is on the guide roller 21.

  Next, the sub-plate 192 is manually raised and the main plate 191 is laid down horizontally. In this way, the cargo receiving table 19 is expanded horizontally. When the lift cylinder 16 is extended in this state, the load receiving table 19 can be raised to the raised position in FIG. 2 while keeping the load receiving table 19 horizontal. Further, if the lift cylinder 16 is contracted from the raised position, the load receiving base 19 can be lowered to the original position.

  When the lift cylinder 16 is further contracted after the lower arm 17 lands, the load receiving base 19 is tilted by the action of the auxiliary link 14 so as to lower the front end (rear end) thereof and follows the ground. Accordingly, for example, by moving a cart (cargo) (not shown) having casters from the rear to the front of the load receiving table 19, the cart can be easily loaded and unloaded on the load receiving surface 19a.

  In order to store the load receiving base 19, the sub-plate 192 is erected from the state where the lower arm 17 lands and the load receiving base 19 is horizontal, and is further leaned against the guide roller 21. Next, the upper arm 15 and the lower arm 17 are raised, and the sub plate 192 is folded onto the main plate 191 by its own weight. Then, the slide cylinder 22 is contracted to retract the movable side support member 13, the elevating device 18, and the load receiving base 19 to the front position, and the storage state of FIG. 1 is obtained.

[Receiver]
FIG. 5 is a side cross-sectional view showing a state where the load receiving base 19 is expanded. Further, FIG. 6 is a plan view of the load receiving base 19 as seen from the back surface side. 5 and 6, the load receiving base 19 is configured by connecting a plurality of blocks 194 in parallel in the vehicle front-rear direction (left-right direction in FIG. 5). Each block 194 is made of, for example, an aluminum alloy hollow member formed by extrusion molding, and is formed so as to extend in the vehicle width direction (vertical direction in FIG. 6) which is the direction of extrusion molding (extrusion direction). Note that each block 194 may be formed by pultrusion.

  In the present embodiment, the main plate 191 of the cargo receiving table 19 is configured by connecting a predetermined number (three in the example) of blocks 194a, 194b, 194c in parallel in the vehicle front-rear direction. The block 194b adjusts the length dimension of the main plate 191 in the front-rear direction, and is formed to have a shorter length dimension in the front-rear direction than the other blocks 194a and 194c.

  Further, the sub-plate 192 of the cargo receiving table 19 is configured by connecting a predetermined number (four in the illustrated example) of blocks 194d, 194e, 194f, and 194g in parallel in the vehicle front-rear direction. The block 194e adjusts the length dimension of the sub-plate 192 in the front-rear direction, and is formed to have a shorter length dimension in the front-rear direction than the other blocks 194d, 194f, 194g.

The upper surfaces of the blocks 194a to 194c of the main plate 191 and the upper surfaces of the blocks 194d to 194g of the sub-plate 192 respectively constitute a part of the load receiving surface 19a (hereinafter, each of these upper surfaces will be simply referred to as "load receiving surface". 19a ").
The lower surfaces of the blocks 194a to 194c of the main plate 191 and the lower surfaces of the blocks 194d to 194g of the sub plate 192 respectively constitute a part of a back surface 19b opposite to the load receiving surface 19a (hereinafter, these Each lower surface is also simply referred to as "back surface 19b".

At both ends of each of the blocks 194a to 194c of the main plate 191, and at both ends of each of the blocks 194d to 194g of the sub-plate 192 in the width direction, a load on the load receiving surface 19a is prevented from falling from both left and right sides. Side stoppers 34 and 35 are attached (see also FIG. 2).
Further, a rear stopper 36 for preventing the load on the load receiving surface 19a from falling from the rear is attached to the block 194g at the tip of the sub-plate 192 so that it can be raised and lowered selectively with respect to the load receiving surface 19a. .

On the back surface 19b of the blocks 194a to 194c of the main plate 191, a bracket 195 to which the upper arm 15 and the lower arm 17 (see FIG. 2) are connected is attached on the inner side in the vehicle width direction.
On the back surface 19b of the blocks 194a to 194c of the sub plate 192, a stiffener 196 that supports these blocks 194a to 194c from below is attached to the inner side in the vehicle width direction.

  The back surface 19b of each block 194d to 194g of the sub-plate 192 is in an upward state when the sub-plate 192 is folded on the main plate 191 (see FIG. 1). Therefore, the back surface 19b of the block 194d located on the rear side of the vehicle body 2 is lifted by the operator between the ground and the floor surface b1 of the luggage box B in a state where the cargo receiving table 19 is stored under the vehicle body 2. It is used as a step to get off.

  In addition, although the front loading platform of the present embodiment includes one sub-plate, two or more sub-plates may be foldably connected on the main plate. In this case, the front cargo receiving base may be configured to face upward with the back surface of the block of at least a part of the plurality of sub-plates stored under the vehicle body.

[Blasting]
The main plate 191 and the sub-plate 192 are blasted on the load receiving surface 19a in order to prevent the load on the load receiving surface 19a from slipping. In the present embodiment, shot blasting is applied to the entire load receiving surfaces 19a of the blocks 194a and 194c of the main plate 191, and the entire load receiving surfaces 19a of the blocks 194d and 194f of the sub plate 192, for example. As a result, numerous fine irregularities (not shown) are irregularly formed on the entire load-receiving surface 19a that has been shot blasted.

  The blocks 194a, 194c, 194d, and 194f are shot-blasted because the length of the block 194 in the front-rear direction is relatively long and the shot-blasting can be easily performed. It should be noted that the load receiving surface 19a of the block 194b of the main plate 191 and the load receiving surface 19a of the blocks 194e and 194g of the sub plate 192 are not subjected to shot blasting.

  Each of the blocks 194a, 194c, 194d, 194f whose shot receiving surface 19a is shot blasted is also shot blasted on the entire back surface 19b (the cross-hatched portion in FIG. 6). The reason is that, when a large number of metal particles collide with the load receiving surface 19a during shot blasting of the load receiving surface 19a, the load receiving surface 19a is tapped and deformed so that the block 194 is warped in a convex shape. This is because the warp on the side of the load receiving surface 19a can be corrected by subjecting the back surface 19b to shot blasting so that the block 194 warps in the opposite direction.

  In this embodiment, since the back surface 19b of the block 194d of the sub-plate 192 is subjected to shot blasting, when the operator puts his / her foot on the back surface 19b, which is a step in the stowed state of the load carrier 19, the operator slides. Can also be prevented.

  Although the shot blasting is used as the blasting in this embodiment, other blasting such as sand blasting or shot peening may be used. Further, in the present embodiment, the blasting process is performed on a part (blocks 194a, 194c, 194d, 194f) of the plurality of blocks 194 configuring the cargo receiving table 19, but all the blocks 194a to 194g are subjected to the blasting process. Alternatively, the blast process may be performed on only one arbitrary block 194. Further, in the present embodiment, the load receiving surface 19a and the back surface 19b of the block 194 are blasted, but at least the load receiving surface 19a may be blasted.

[Effect]
According to the load receiving platform elevating / lowering device 1 of the present embodiment configured as described above, since the load receiving surface 19a of the block 194 forming the load receiving platform 19 is subjected to the blasting process, the block 194 subjected to the blasting process is performed. A large number of fine irregularities are irregularly formed on the load receiving surface 19a. As a result, it is possible to effectively prevent the luggage on the cargo receiving surface 19a from slipping in the vehicle front-rear direction and the vehicle width direction. In particular, the block 194 formed by extrusion molding has a uniform cross-sectional shape in the extrusion direction (vehicle width direction), and the luggage on the load receiving surface 19a easily slips in the vehicle width direction as it is. The cross-sectional shape changes in the extrusion direction due to a large number of fine and irregular asperities, which makes it difficult for the luggage to slip in the vehicle width direction.

  In addition, since the blasted block 194 is also blasted on the back surface 19b opposite to the load receiving surface 19a, the following operational effects are obtained. That is, when the load receiving surface 19a of the block 194 is beaten and extended by the blasting process, the block 194 is deformed so as to warp in a convex shape, but the back surface 19b of the block 194 is also subjected to the blasting process. The warp on the side of the load receiving surface 19a is corrected by warping in the direction opposite to the warp on the side of the load receiving surface 19a. As a result, the block 194 can be prevented from being deformed even if the load receiving surface 19a is blasted.

  In addition, since the back surface 19b of the block 194 of the sub-plate 192 used as a step is blasted while the load receiving table 19 is stored under the vehicle body 2, the operator can step on the back surface 19b that is a step. It is possible to prevent it from slipping when it is placed.

It should be understood that the embodiments disclosed this time are illustrative in all aspects and not restrictive. The scope of the present invention is shown not by the above meaning but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.
For example, the load receiving platform lifting device 1 of the present invention has been described as being applied to an underfloor storage type load receiving platform lifting device, but may also be applied to other types of load receiving platform lifting devices such as a standing storage type and a vertical lifting type. You can

DESCRIPTION OF SYMBOLS 1 Cargo stand lifting device 2 Vehicle body 18 Lifting device 19 Cargo stand 19a Cargo receiving surface 19b Rear surface 191 Main plate (base carton)
192 Sub-plate (front loading platform)
194 Block V Vehicle

Claims (4)

A cargo cradle which is a part of a cargo cradle lifting device attached to a vehicle, and which is formed by extruding or drawing a plurality of aluminum alloy blocks connected in parallel,
The plurality of blocks is composed of a block having a blast treatment on the load receiving surface and a block having no blast treatment on the load receiving surface,
A cradle in which the blasted block is connected to the blasted block .   The load receiving base according to claim 1, wherein the blasted block is also blasted on the back surface opposite to the load receiving surface. A loading platform lifting device mounted on a vehicle,
A load carrier lifting device comprising: the load carrier according to claim 1 or 2; and a lifting device that lifts and lowers the load carrier. The receiving platform includes a base receiving platform which is attached to and the lifting device consists of a predetermined number of blocks of the plurality of blocks, and made from other predetermined number of blocks of the plurality of blocks the A front load receiving cradle that is foldably attached to the base load receiving base, and the rear surface opposite to the load receiving surface of at least some of the blocks of the front load receiving base is upward. Is capable of being stored under the vehicle body of the vehicle in a state in which the front load receiving base is folded to the base load receiving base so as to face
The blast process is given to the back surface of the block used as a step among the some blocks in the front part pedestal in a state where the pedestal is stored under the vehicle body. Loading platform lifting device.

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