JPH043799A - Hose supporting device for fork-lift - Google Patents

Abstract

PURPOSE:To prevent the surfaces of hydraulic hoses from being severely abraded by providing hose pulleys supported on a support shaft rotatably and movably to the right and left of a machine base and spring means to hold the hose pulleys at the preset positions. CONSTITUTION:Hydraulic hoses 10a, 10b are wound on hose pulleys 11a, 11b, when inner masts are moved up and down, pulleys 11a, 11b are rotated after its movement and pull the hoses 10a, 10b to prevent the occurrence of a slack. Compression springs 16, 17, 18 are not twisted by rolling ball bearings 19, 20. When a drift is generated in the right or left direction between the orbits of the hydraulic hoses 10a, 10b and groove axes of the hose pulleys 11a, 11b due to a backlash between the inner masts and the deflection of the hoses 10a, 10b, pressing forces are applied to side receiving faces of grooves of the pulleys 11a, 11b by hoses 10a, 10b. The pulleys 11a, 11b are moved in the pressed direction, the hoses 10a, 10b are not bent into an unreasonable shape, and no strong reaction forces are applied to the hoses 10a, 10b from the pulleys 11a, 11b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hose support device for supporting a hydraulic hose for a forklift attachment.

[Prior Art] A forklift truck is sometimes equipped with a hydraulically driven attachment such as a clamp device instead of a fork. Hydraulic oil for driving such attachments is appropriately supplied from a control valve in the machine via a hydraulic hose.

FIG. 2 shows a conventional general hose support device for supporting a hydraulic hose for an attachment. In the conventional hose support device, hose pulleys 1a and 1b
is attached to the support shaft 3 of the pulley support 2, and the pulley support 2 is fixed to the inner mast upper beam 5 with bolts 4. Hydraulic hoses 6a, 6
b is wound around these hose pulleys 1a and 1b, one end is connected to the attachment, and the other end is fixed in place on the outer mast. The hose pulleys 1a, 1b are arranged so as to pull the hydraulic hoses 6a, 6b regardless of the position of the inner mast, so as to prevent the hydraulic hoses 6a, 6b from becoming slack.

[Problems to be Solved by the Invention] In the conventional configuration as described above, the pulley support 2 is fixed by screwing the bolt 4 into the screw hole originally provided in the inner mast upper beam 5, and the hose pulley 1a , 1b are attached to the support shafts 3 of the pulley sabots 1 and 2 so that they cannot be moved left and right, so it is extremely difficult to completely align the groove cores of the hose pulleys 1a and 1b with the tracks of the hydraulic hoses 6a and 6b. . Also,
Groove cores of hose pulleys 1a, 1b and hydraulic hoses 6a, 6
Even if the trajectories b perfectly match, the hydraulic hoses 6a and 6b may deviate from side to side due to play between the masts or the like. In such a case, the side supports of the hose pulleys 1a, 1b of the hydraulic hoses 6a, 6b are pressed against the surface, so the rotation of the hose pulleys 1a, 1b as the inner mast moves up and down causes the surfaces of the hydraulic hoses 6a, 6b to be violently touched. There is a risk of wear.

An object of the present invention is to provide a hose support device that can solve such conventional technical problems.

Means for Solving the Problem] In order to achieve the above object, a hose support device according to the present invention includes a pulley support that is attached to the inner mast upper beam and has a support shaft that extends in the horizontal direction of the machine base;
The apparatus includes a hose pulley rotatably supported by the support shaft and movable in the horizontal direction of the machine, and spring means for holding the hose pulley in a predetermined position.

[Function] In such a configuration, when the hydraulic hose wound around the hose pulley deviates in the left-right direction, the hose pulley follows the deviation and moves in the left-right direction along the support axis of the pulley support. Can be moved.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, the forklift hose support device according to the present invention includes hydraulic hoses 10a and 1 for attachment l-
It includes hose pulleys 11a and 11b around which the hose pulleys 11a and 11b are wound, and a pulley support 12 that supports these hose pulleys 11a and llb. The pulley support 12 is L-shaped, and its horizontal portion is fixed to the inner mast upper beam 13 with bolts 14, as in the conventional case. Further, a support shaft 15 is fixed to a vertical portion of the pulley support 12 and extends in the left-right direction of the machine. Hose pulleys 11a and llb are rotatably supported on the support shaft 15.

The hose pulleys 11a, llb can also slide along the support shaft 15. two hose pulleys 11a
A compression spring 16 is arranged on the support shaft 15 between , 11b,
Further, compression springs 17 and 18 are arranged between the hose pulley 11a and the hexagonal head at the tip of the support shaft 15, and between the hose pulley 11b and the pulley support 12, respectively. The action of these springs 16, 17, 18 holds the hose pulleys 11a, llb in their designed position on the support shaft 15. In this example, each compression spring 16.
A rolling ball bearing 19.20 is arranged at the end of 17.18. The outer ring 19a of the rolling ball bearings 19 arranged at both ends of the support shaft 15 is fixed to the support shaft 15, and the inner ring 19b is fixed to the corresponding compression spring 17.18. In addition, each hose pulley 11a, llb
Regarding the rolling ball bearings 20 arranged on both sides of the hose pulley 1, the ring 20m on the hose pulley side is
1a, llb, and the other ring 20b is fixed to a corresponding compression spring 16, 17, 18.

In the hose support device with such a configuration, the hydraulic hoses 10a and 10b are wound around the hose pulleys 11a and Ilb, and when the inner mass l- moves up and down, the hose pulleys 11a and 1lb follow the movement and rotate. The hydraulic hoses 10a and 10b are pulled to prevent loosening. At this time, the compression springs 16, 17, 18 are not twisted by the rolling ball bearings 19, 20. When the inner mast moves up and down, the play between the masts and the hydraulic port 10a,
If the tracks of the hydraulic hoses 10a, 10b and the center of the hose pulleys 11a, llb are misaligned in the left-right direction due to vibration of the hose 10b, the side supports of the grooves of the hose pulleys 11a, llb will be placed on the surface of the hydraulic hoses 10a, 10b. A pressing force is applied. However, in the present invention, the hose pulley 1
1a and llb can move in the direction in which they are pushed, so the hydraulic hoses 10a and 10b may be bent in an unreasonable manner, and the hose pulley 11a and the hydraulic hoses 10a and 10b may be
No strong reaction force acts from llb.

When the inner mast is stopped, the compression springs 16 and 17
．． By the action of 18, the hose pulleys 11a, llb are returned to their original design positions, and the hydraulic hoses 10a, 10b are also returned to their intended positions.

In addition, the hose pulleys 11a and llb are the hydraulic hoses 10a.
, 10b to move left and right, it is preferable to make the depth of the groove deeper than before so that the hydraulic hose does not come off the groove of the hose pulley.

[Effects of the Invention] As described above, according to the present invention, the hose pulley can follow the left and right movement of the hydraulic hose and change its position to the left and right. There is no movement, and the degree of wear on the hose surface is significantly reduced compared to conventional hoses.

Further, the hydraulic hose is no longer bent into an unreasonable shape by the hose pulley. Furthermore, during assembly, positioning of the pulley support becomes easier, which is advantageous during high production.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing an embodiment of a hose support device according to the present invention, and FIG. 2 is a perspective view showing a conventional general hose support device. In the figure, 10a, 10b, hydraulic hose 11g, 1 l b... hose pulley 12... pulley support 13... inner mast upper beam 15... support shaft 16, 17. 18... compression spring 19.20
...Rolling ball bearing patent applicant Toyota Industries Corporation, Figure 1

Claims (1)

[Claims] a pulley support having a support shaft attached to the inner mast upper beam and extending in the left-right direction of the machine; a hose pulley rotatably supported by the support shaft and movable in the left-right direction of the machine; and spring means for holding in position.