JP2005231748A - Pallet truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform enlargement of specification and improvement of handling operability of a pallet capable of smoothly inserting or removing a carriage from a pallet by sliding of a sleigh body. <P>SOLUTION: In this pallet truck, the rear part of the carriage is supported by a jack device, and the carriage at the lowest position is tilted in the state where the front part is lower and the rear part is higher. The sleigh body is disposed where lateral width of the front wheel rolling surface of a synthetic resin-made pallet is larger than the recessed part thereof and a flat surface is tilted in the state having lower front part and higher rear part. The sleigh body is disposed in the front of the front wheel in the front part of the carriage, and the carriage is inserted into the pallet by the sliding of the sleigh body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pallet truck that carries, for example, a load on a plastic pallet.

  Conventionally, a fork-type cargo bed having a front wheel that can be moved in and out and a jack device that has a rear wheel that can be changed in direction are provided. There is a technique of supporting and tilting the loading platform in the lowest position to the front low and the high. (For example, see Patent Document 1)

Japanese Patent Laid-Open No. 10-81240

  In the prior art, when a synthetic resin pallet used for a forklift car is moved, it is necessary to form the cargo bed with a small vertical width like a fork of a forklift car, and therefore, a front wheel having a small diameter is used. However, the grid-shaped ribs are formed on the pallet for the purpose of cost reduction, weight reduction and rigidity improvement, and a large number of recesses are arranged on the front wheel moving surface of the pallet. There is a problem that the front wheel enters the recess and collides with the rib. Especially, the plastic resin pallet formed exclusively for forklift cars has a smaller fork insertion space than the wooden one, and a recess is formed inside the insertion Therefore, there is a problem that even if the vertical width dimension of the cargo bed is made small and tilted to the front low and rear high, it cannot be smoothly put in and out.

  However, according to the present invention, as in claim 1, a fork-type cargo bed having a front wheel that can be moved in and out and a jack device having a rear wheel that can be changed in direction are provided, and a pumping handle for raising and lowering operations and push-pull operations is provided as a jack device. In the pallet truck that supports the rear part of the loading platform by a jack device and tilts the loading platform in the lowest position to the front low, rear, and height, the lateral width is larger than the concave portion of the front wheel rolling surface of the synthetic resin pallet and the front Characterized in that a housing is provided that forms a smooth surface that slopes up and down, the housing is provided in front of the front wheel at the front of the loading platform, and the loading platform is inserted into a pallet by sliding of the housing. To do.

  According to another aspect of the present invention, a front wheel arm that supports the front wheel so that it can freely enter and exit, a front wheel shaft that pivotally supports the front wheel on the front wheel arm, and a front wheel fulcrum shaft that pivotally supports the front wheel arm on the fork-type loading platform, Is stored in the vertical width of the loading platform with the loading platform lowered to the bottom, and only a part of the front wheels and a part of the casing are projected to the lower surface side of the loading platform at the lowest lowered position. And

  The invention according to claim 1 is provided with a fork-type cargo bed having a front wheel that can be moved in and out, and a jack device having a rear wheel that can change direction, and a pumping handle for raising and lowering operation and push-pull operation is provided in the jack device, In the pallet truck that supports the rear part of the loading platform with a jack device and tilts the loading platform in the lowest position to the front low rear height, the left and right width is larger than the concave portion of the front wheel rolling surface of the synthetic resin pallet and the front height rear lower A housing that forms a smooth surface to be inclined is provided, the housing is provided in front of the front wheel at the front of the loading platform, and the loading platform is inserted into a pallet by sliding the housing. Even if it is a synthetic resin pallet for forklift trucks with a small vertical width dimension and a recess formed inside, the housing is designed to lift the front wheel against the recess of the pallet. Since for moving the loading platform to be able to smoothly perform extraction of work Dari crowded differences palette, in which like enlargement specifications Specification palettes and improve handling operability can be easily achieved.

  According to a second aspect of the present invention, there is provided a front wheel arm that supports a front wheel so that the front wheel can freely enter and exit, a front wheel shaft that rotatably supports the front wheel on the front wheel arm, and a front wheel fulcrum that rotatably supports the front wheel arm on a fork-type loading platform. The shaft is stored in the vertical width of the loading platform with the loading platform lowered to the bottom, and only a part of the front wheel and a part of the housing are projected to the lower surface side of the loading platform at the lowest lowered position. Thus, the front wheel arm can be completely accommodated inside the cargo bed in the lowest position, the bottom surface of the cargo bed except for the front wheels and the housing can be formed substantially flat, and the cargo bed can be smoothly moved in and out of the pallet.

  Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a side view of the whole, FIG. 2 is a plan view of the same, FIG. 3 is a front view of the same, and FIG. 4 is a cross-sectional side view. A bifurcated fork-type loading platform 3 is a jack device for supporting a rear end of the loading platform 1 by supporting a rear wheel 4 for traveling at the lower part and raising and lowering the same. 5 is a cylinder head at the lower end via an axle 6. A hydraulic cylinder for attaching the rear wheel 4, 7 is a ram-type piston that is brought into contact with the support portion 8 of the loading platform 1 via a sphere, 10 is a hydraulic base that is fixed and supported substantially horizontally in the middle of the cylinder 5, and 11 is the hydraulic pressure. A bearing plate 14 is provided on the circumferential side of the cylinder 5 below the base 10 so as to be rotatable, and connects a lifting arm 12 and a lifting rod 13 that project the front wheel 2 in proportion to the upward movement of the piston 7. Oil fixed on the circumference side of the cylinder 5 on the upper surface 15, a plunger pump 15 for sending pressure oil to the cylinder 5, 9 a pumping handle for raising / lowering operation and a push / pull operation provided with a loop-shaped grip at the upper end, and 16 a pressure release lever provided at the grip of the handle 9. The pumping handle 21 is erected and supported on the tank 14 so as to be able to fall backward.

  Further, as shown in FIGS. 5 and 6, the front wheel 2 is pivotally supported on the front wheel arm 17 via the front wheel shaft 18, and the front wheel arm 17 is pivotally supported on the loading platform 1 via the front wheel fulcrum shaft 19. The lifting rod 13 is fixed to the rotatable eccentric shaft 20 of the front wheel arm 17, the lifting rod 13 is moved forward, the front wheel 2 is protruded downward, the loading platform 1 is raised, and the lifting rod 13 is moved backward. To retract the front wheel 2 into the loading platform 1 and lower the loading platform 1.

  Further, a downward angled mountain-shaped casing 21 is fixed to the lower surface side of the front end of the loading platform 1 ahead of the front wheel 2, the diameter of the front wheel 2 is formed larger than the vertical width dimension of the loading platform 1, and the vertical width dimension of the loading platform 1. The vertical width dimension of the casing 21 is formed larger, the vertical width dimension of the casing 21 is made smaller than the diameter of the front wheel 2, and the lateral width of the casing 21 is made larger than the lateral width of the front wheel 2, The left and right width L2 of the housing 21 is formed to be larger than the left and right width L1 of the recess 24 between the reinforcing ribs 23 formed on the synthetic resin pallet 22, and as shown in FIGS. The loading platform 1 is inserted into the insertion space 27 formed between the lower platforms 26, the loading platform 1 is raised, the pallet 22 is lifted, and the pallet 22 and the luggage 29 are moved.

  As is apparent from the above, a fork-type loading platform 1 having a front wheel 2 that can be moved in and out and a jack device 3 having a rear wheel 4 that can be changed in direction are provided, and a pumping handle 9 for raising and lowering operations and push-pull operations is provided as a jack device. 3, in a pallet truck in which the rear portion of the loading platform 1 is supported by the jack device 3 and the loading platform 1 in the lowest position is inclined to the front low and rear height, from the concave portion 24 of the front wheel rolling surface 28 of the synthetic resin pallet 22. Also, a housing 21 is provided that forms a smooth surface that has a large left and right width and is inclined to the front and rear and low, and the housing 21 is provided in front of the front wheel 2 at the front part of the loading platform 1, and the housing 21 slides. For example, the loading platform 1 is inserted into the pallet 22 and, for example, the fork lift space 27 has a small vertical width dimension and a recess 24 formed in the inside thereof. Even so, since the housing 21 slides so as to lift the front wheel 2 with respect to the recess 24 of the pallet 22, the work of inserting and removing the loading platform 1 from the pallet 22 can be performed smoothly and can be used. The specification of the pallet 22 can be expanded and handling operability can be improved.

  Further, a front wheel arm 17 that supports the front wheel 2 so as to freely enter and exit, a front wheel shaft 18 that rotatably supports the front wheel 2 on the front wheel arm 17, and a front wheel fulcrum shaft that rotatably supports the front wheel arm 17 on the fork-type loading platform 1. 19 is stored in the vertical width of the loading platform 1 with the loading platform 1 lowered to the bottom, and only a part of the front wheel 2 and a part of the casing 21 are placed at the lowermost position of the loading platform 1. The front wheel arm 17 is completely accommodated inside the loading platform 1 in the lowest position, the bottom surface of the loading platform 1 excluding the front wheel 2 and the housing 21 is formed substantially flat, and the loading platform 1 is placed on the pallet 22. To get in and out smoothly.

  Further, as shown in FIGS. 11 to 14, when the opening 30 is formed in the upper base 25 and the lower base 26 of the pallet 22, the housing 21 is moved to the front wheel rolling surface 28 so that the front wheel 2 does not collide with the edge of the opening 30. As shown in FIG. 14, the front wheel arm 17 is inserted into the opening 30, the front wheel 2 is landed on the road surface of the opening 30, and the load 29 is moved up to move the load 29. 7 has a structure for a forklift car, and the pallet 22 in FIG. 11 has a standard pallet structure according to Japanese Industrial Standards.

Overall side view. FIG. The front view. Sectional side view. The enlarged side view of a front wheel part. FIG. Explanatory drawing which inserts a loading platform into a pallet. Pallet mounting explanatory diagram. Pallet lifting explanatory diagram. The enlarged view. Standard pallet usage illustration. Explanatory drawing which inserts a loading platform into a standard pallet. Standard pallet mounting explanatory diagram. Standard pallet lifting explanatory drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fork type loading platform 2 Front wheel 3 Jacking device 4 Rear wheel 9 Pumping handle 17 Front wheel arm 18 Front wheel shaft 19 Front wheel fulcrum shaft 21 Housing 22 Pallet 24 Recess 28 Front wheel rolling surface

Claims (2)

  A fork-type cargo bed with a front wheel that can be moved in and out and a jack device with a rear wheel that can be changed in direction are provided. A pumping handle for raising and lowering operation and push-pull operation is provided in the jack device, and the rear part of the cargo bed is supported by the jack device. In the pallet truck for inclining the loading platform at the lowest position to the front low and rear height, a smooth surface that is wider than the concave portion of the front wheel rolling surface of the synthetic resin pallet and tilts to the front high and rear low is formed. A pallet truck characterized by providing a body, providing the housing in front of the front wheel at the front of the loading platform, and inserting the loading platform into the pallet by sliding the housing.   A front wheel arm that supports the front wheel so that it can freely enter and exit, a front wheel shaft that rotatably supports the front wheel on the front wheel arm, and a front wheel fulcrum shaft that rotatably supports the front wheel arm on the fork-type cargo bed are lowered to the bottom. 2. The storage device according to claim 1, wherein the vehicle body is stored in a vertical width of the cargo bed in a state where only a part of the front wheel and a part of the housing are protruded to a lower surface side of the cargo bed at the lowest lowered position. Pallet truck.

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