JP2002220195A - Clamping device for forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate strong clamping force without decreasing clamping force for inner side piping/wiring members, when clamping not less than three pieces of piping/wiring members such as hoses or cables. SOLUTION: A first clamp 30a is made of flexible material. Three roughly semicircular fixing grooves 31a are provided in parallel on an inner surface of the clamp 30a, and bolt inserting spot facing holes 32 are bored on both sides of the clamp 30a. The first clamp 30a has a bending shape in an opposite direction to an opening surface side of the fixing grooves 31a. Another clamp 30b has three fixing grooves 31b in parallel, and bolt inserting holes 33 are bored on both sides. Hoses 13 are put between fixing grooves 31a, 31b of the two clamps 30a, 30b, and bolts penetrating both sides of a clamp 30 are screwed in screw holes 22 on a fixing plate 21. By fastening the bolts, the clamp 30a is deformed to grip and fix the hoses 13 with the clamp 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift clamping device for fixing a hose for supplying hydraulic oil to a hydraulic operating device and a cable for electric wiring.

[0002]

2. Description of the Related Art Generally, in a mast device of a forklift, a hose for supplying hydraulic oil to a hydraulic actuator and an electric cable for electric wiring for supplying power are suspended. FIG. 3 is a perspective view of the mast device 1 as viewed from the driver's seat side of the forklift. The mast device 1 is mainly composed of a pair of left and right outer masts 2 and left and right arranged inside the outer mast 2 so as to be able to move up and down. It is composed of a pair of inner masts 3. Plate-shaped beams 4 and 5 for maintaining rigidity are respectively bridged on the upper and lower portions of the outer mast 2, and the inner mast 3 is raised and lowered on the back side (the front side in FIG. 3) of the outer mast 2 on both sides. Lift cylinders 6 are provided for each of them.

A beam 7 is bridged between the upper parts of the left and right lift cylinders 6, and the rods 10 of the lift cylinder 6 penetrate the beam 7 to fix the upper ends of both rods 10 between the left and right inner masts 3. The beam 11 is fixed. Also, a hose pulley 12 having a plurality of rows of guide grooves is rotatably suspended from the lower surface of the beam 7,
A plurality of hoses 13 for supplying pressure oil to a hydraulic operating device (not shown) are suspended from the hose pulley 12, and three hoses 13 are suspended in FIG. The other side of the hose 13 suspended on the hose pulley 12 is movable up and down, and is hung downward along the inside of the mast device 1. The hose 13 before the hose pulley 12 is lifted by the hydraulic pipe fixing device 20. The end is fixed to the cylinder 6 side and is connected to a pump or the like (not shown).

FIG. 4 is an enlarged perspective view of a main part of the hydraulic pipe fixing device 20 including the hose pulley 12, and FIG. 5 is an enlarged exploded perspective view of the hydraulic pipe fixing device 20. The hydraulic pipe fixing device 20 is fixed at one end to the lift cylinder 6 side and a metal plate-shaped fixing plate 21 provided with a screw hole 22 at the other end, and is fixed to the inside of the fixing plate 21 by a bolt 27. , Three hoses 1 suspended from a hose pulley 12
3 and a pair of clamps 23 (23a, 23a
b).

The clamp 23 is made of synthetic resin, and as shown in FIGS.
On the inner surface of a, three substantially semicircular fixing grooves 24a are juxtaposed. A counterbore hole 25 for inserting a bolt 27 is formed on each side of the clamp 23a. Similarly, three fixing grooves 24 are arranged in parallel on the inner surface of the other clamp 23b so as to face the fixing grooves 24a, and holes 27 for inserting the bolts 27 corresponding to the counterbore holes 25 are formed on both sides of the clamp 23b. 26 are each perforated.

As shown in FIGS. 3 to 5, three hoses 1 are provided.
3 is sandwiched between the fixing grooves 24a and 24b of the clamp 23, the bolt 27 is inserted into the counterbore hole 25 and the hole 26 of the clamp 23, screwed into the screw hole 22 of the fixing plate 21, and the hose 13 is fixed to the fixing grooves 24a and 24b, respectively. It is pinched by. By fixing the clamp 23 to the fixed plate 21, the three hoses 13 are clamped and fixed by the clamp 23.

[0007]

The purpose of fixing the hose 13 with the clamp 23 is to apply a tension of 200 to 300 Newtons to the hose 13 when the hose 13 is so-called masted piping as shown in FIG. Is to maintain that tension. However, three hoses 13
When clamping (clamping and fixing) with this clamp 23,
Since the clamp 23 is made of synthetic resin, when the clamp 23 is fixed with the two bolts 27 on both sides, the clamp 23, especially the outer clamp 23 a, is shown in FIG. 8 by the tightening force of the bolt 27 and the reaction force of the hose 13. There was a problem of warping as shown. As shown in FIG. 6B, since the upper and lower surfaces of the clamp 23a are horizontal and parallel, the clamp 23a is easily warped by the tightening force of the bolt 27 and the reaction force of the hose 13.

As described above, when the clamp 23a warps, the clamping force of the central hose 13 is reduced as compared with the two outer hoses 13, and the clamping force is hardly transmitted to the central hose 13. Only the central hose 13 tended to come off. In FIG. 8, for easy understanding of the problem, the clamp 23 and the hose 13 are illustrated with a gap provided, and the clamp 23a is also illustrated in a slightly warped state.

Further, in the conventional explanation, the example of clamping and fixing by the clamp 23 has been described with the hose 13 for supplying the pressurized oil. However, the same problem occurs when the electric cable is similarly clamped and fixed by the clamp 23. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a reduced clamping force for inner piping and wiring members when clamping three or more hoses and cables for piping and wiring members. An object of the present invention is to provide a forklift clamping device that aims to generate a strong clamping force without causing the clamping force.

[0011]

SUMMARY OF THE INVENTION Therefore, in a forklift clamping apparatus according to the present invention, there is provided a forklift having a pair of grooves formed on its inner surface to sandwich three or more linear piping and wiring members such as hoses and cables. Is formed, and a bolt hole is provided at each end of the clamp for fastening the two clamps to each other. One of the clamps is made of a flexible material and curved in a direction opposite to the groove. Shape and
The two clamps are fastened and fixed to each other, whereby one of the clamps is deformed and comes into close contact with the other clamp.

With this configuration, even if the clamp is tightened with bolts from both sides, the central portion of the clamp does not rise even when there is a tightening force or a reaction force of a piping or wiring member such as a hose or a cable. For this reason, a stronger fixing force (clamping force) can be generated as compared with the related art, and the inner piping / wiring member does not easily come off. In addition, since the fixing force is increased, the thickness of the clamp can be reduced, which leads to cost reduction.

According to another aspect of the present invention, a pair of clamps have the same shape.

Thus, when the clamp is made of synthetic resin, only one type of mold can be used, and the clamp can be manufactured at low cost.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. Since the overall configuration of the mast device 1 as shown in FIG. 3 is the same as that of the conventional device, the same reference numerals are given to the elements exhibiting the same functions, and the detailed description is omitted. It will be described in detail.

That is, as shown in FIGS. 1 and 2, the clamp 30 made of synthetic resin is
And a clamp 30b. One clamp 30a is made of a flexible material, and three substantially semicircular fixing grooves 31a are juxtaposed on the inner surface of the clamp 30a in the same manner as in the prior art, and counterbore for inserting the bolt 27 is provided on both sides. Hole 3
2 is perforated. The one clamp 30a has a shape curved in a direction opposite to the opening side of the fixing groove 31a, and the upper and lower surfaces have the same curvature. The other clamp 30b is also provided with three fixing grooves 31b, and has holes 33 for inserting bolts 27 on both sides. The upper and lower surfaces of the clamp 30b are horizontal and parallel. The clamp 30 and the fixing plate 21 constitute the hydraulic pipe fixing device 20 as in the conventional case.

As shown in FIG. 1, two clamps 30
The hose 13 is sandwiched between the fixing grooves 31a and 31b of the a and 30b, and the bolt 27 is
The holes 33 are inserted into the fixing plate 21 and screwed into the screw holes 22.
By tightening the bolt 27, the one clamp 3
0a is deformed so that the inner surfaces on both sides of the clamp 30a come into close contact with the inner surfaces on both sides of the other clamp 30b and the hose 13a is closed.
And fix it. This state is shown in FIG. In FIG. 2, the outer peripheral surface of the hose 13 and the fixing groove 3 are shown for easy understanding.
There is a gap between the inner peripheral surfaces of 1a and 31b,
Actually, the hose 13 is pressed against the inner peripheral surfaces of the fixing grooves 31a and 31b.

As described above, the clamp 30a is connected to the bolt 27
The clamp 30a itself is warped in a direction opposite to the direction in which the hose 13 is tightened, so that even if there is a tightening force of the bolt 27 and a reaction force of the hose 13, the central portion of the clamp 30a is the same as in the related art. Never emerge. Therefore, the hose 13 can be clamped and fixed with a stronger clamping force than before. This prevents the middle hose 13 from easily coming off the clamp 30. Further, the clamp 3 warped in a substantially arc shape as described above.
Since the clamping force can be increased by the shape of 0a,
By reducing the thickness of the clamp 30a, the cost of the material can be reduced. Further, the reaction force in the direction opposite to the direction in which the hose 13 is tightened due to the warp of the clamp 30a is applied to the bolt 27.
Can prevent the bolt 27 from being loosened due to vibration or the like, and can surely secure the hose 13 for a long period of time.
Can be fixed.

Although the upper and lower surfaces of the other clamp 30b are horizontal and parallel to each other, the other clamp 30b is bent with flexibility in the direction opposite to the direction in which the hose 13 is clamped, similarly to the clamp 30a. You may do it. Alternatively, the hose 13 may be clamped and fixed from both sides by using two clamps 30a having the same shape. In this case, since the clamps 30a having the same shape can be used, only one type of mold is required for forming the clamps 30a, and the manufacturing cost can be reduced.

In the above embodiment, the number of hoses 13 has been described as three, but the present invention can be applied to the case where there are three or more hoses. In such a case, the number of the fixing grooves 31 a and 31 b of the clamp 30 is formed corresponding to the number of the hoses 13. Further, the clamp 30 may be made of a flexible metal instead of a synthetic resin.

In the above description, the clamp 30
Although the description has been given of the case where the member to be clamped and fixed by the hose 13 for supplying pressure oil is described, the case where the electric cable for electric wiring is clamped and fixed by the clamp 30 is also included in the present invention. Further, the present invention can be applied to a case where the hose 13 and the electric cable are mixed and clamped.

[0022]

According to the clamping device for a forklift according to the first aspect of the present invention, even if the clamp is tightened with bolts from both sides, the central portion of the clamp has the tightening force and the piping and wiring members such as hoses and cables. Even if there is a reaction force, it does not rise, so that a uniform and strong fixing force (clamping force) can be generated for each piping / wiring member, and the inner piping / wiring member is easily pulled out. Not even. In addition, since the fixing force is increased, the thickness of the clamp can be reduced, which leads to cost reduction. Further, a reaction force in the direction opposite to the tightening direction is applied to the bolt at the time of bolt tightening, thereby preventing the bolt from being loosened and securely fixing the hose for a long period of time.

According to the clamp device for a forklift according to the second aspect, since the pair of clamps have the same shape, when the clamps are formed of synthetic resin, only one type of mold can be used, and the clamps can be manufactured at low cost. Can be manufactured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a hydraulic pipe fixing device according to an embodiment of the present invention.

FIG. 2 is a sectional view of the hydraulic pipe fixing device according to the embodiment of the present invention, showing a state in which the hose is clamped.

FIG. 3 is a perspective view of a mast device.

FIG. 4 is a perspective view of a main part showing a state where a hose is clamped by a conventional hydraulic pipe fixing device.

FIG. 5 is an exploded perspective view of a conventional hydraulic pipe fixing device.

FIGS. 6A and 6B are a plan view and a front view of one clamp of a conventional example.

FIG. 7 is a front view of the other clamp of the conventional example.

FIG. 8 is a cross-sectional view showing a state where a hose is clamped by a conventional hydraulic pipe fixing device.

[Explanation of symbols]

 13 Hose 21 Fixing plate 22 Screw hole 27 Bolt 30 Clamp 30a Clamp 30b Clamp 31a Fixing groove 31b Fixing groove

Claims (2)

[Claims] 1. A pair of clamps each having at least three grooves for holding a linear piping / wiring member such as a hose or a cable formed on an inner surface thereof, and bolts for fastening the two clamps to each other at both ends of the clamps. A hole is provided, and one of the clamps is made of a flexible material and has a shape curved in a direction opposite to the groove, and the one clamp is deformed by fastening and fixing the two clamps to each other. A forklift clamping device characterized in that it comes into close contact with the other clamp. 2. The forklift clamping device according to claim 1, wherein said pair of clamps have the same shape.