JPS6126699Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamp device that can arrange a plurality of hoses used in hydraulic or pneumatic machines such as construction machines and industrial machines without damaging them.

2. Description of the Related Art In a hydraulic or pneumatic machine, for example, a device consisting of a hydraulic pump and an actuator operated by the hydraulic pump, a plurality of hoses are disposed between the pump and the actuator to flow pressure oil or the like. In order to arrange these hoses without contacting each other, each hose is clamped by a clamp device. A prior art clamping device is shown in FIGS. 1 and 2. FIG. In the drawing, reference numerals 1 and 2 indicate a pair of clamp plates, and the clamp plates 1 and 2 have semi-cylindrical grooves 3A, 3B, 4A, slightly semi-elliptical in shape, spaced apart from each other by a predetermined distance.
4B, and by arranging the clamp plates 1 and 2 facing each other, the grooves 3A and 4A, 3B and 4B
Slightly elliptical cylindrical insertion holes 5A, 5B are formed, and hoses 6A, 6B made of rubber material or the like are inserted into the insertion holes 5A, 5B. 7A, 7B,
8A and 8B are bolt holes drilled at both ends of the clamp plates 1 and 2, and 9A and 9B are bolt holes 7A and 9B, respectively.
Bolts that can be inserted into bolt holes 7A, 8A, 7B, 8B.
Insert the washers 10A, 10A', 10B,
10B', nut 1 via spring seats 11A and 11B.
By tightening 2A, 12B, the clamp plates 1, 2 are tightened together with the hoses 6A, 6B. During this tightening, the hoses 6A and 6B are held in a slightly deformed shape by being pressed against the inner walls of the insertion holes 5A and 5B, since the cross-sections of the respective insertion holes 5A and 5B are slightly oval. and the hose 6
The elastic forces of A and 6B themselves tighten them so that they cannot move in the axial and radial directions, and are arranged at a predetermined interval.

The conventional clamping device is configured in this way, but for example, pressure oil from a hydraulic pump is connected to the hose 6.
When the return oil from the actuator is circulated through the hose 6B, arrows A,
As shown by B, hydraulic pressure acts on the hoses 6A and 6B in opposite directions. When such hydraulic pressure acts on the hoses 6A, 6B, the clamp plates 1, 2 rotate as shown by arrows C, D. This rotational movement causes problems such as displacement of the mounting positions of the clamp plates 1 and 2, and damage to the hoses 6A and 6B due to friction caused by the corners of the insertion holes 5A and 5B. There were drawbacks such as leakage of pressure oil flowing through the hoses 6A and 6B.

The present invention has been developed in consideration of the drawbacks of the prior art described above, and aims to provide a clamp device which, when a pair of clamp plates are fastened with bolts, applies a radial clamping force to one of the hoses through which fluid flows, while allowing the other hose through which fluid flows to move in the axial direction, thereby preventing rotational movement of the clamp plates even when fluids are flowing in opposite directions within each hose, thereby eliminating any reduction in the lifespan of the hoses due to damage to the hoses.

In order to achieve the above object, the feature of the configuration adopted by the clamping device of the present invention is that when a pair of clamp plates are bolted together, a part of the hose through which fluid flows through one of the hoses inserted into each insertion hole is Some of the insertion holes have an elliptical or elastic shape that can press the hose so that a clamping force can be applied to the hose directly from the radial direction or through an elastic ring. Formed into a perfect circle shape to which the ring body can be attached,
Further, the other insertion hole is formed in a perfect circular shape with a larger diameter than the outer shape of the hose so that the hose can move in the axial direction with respect to the other hose through which fluid flows.

With this configuration, even when fluid is flowing in opposite directions to multiple hoses, only some of the hoses through which the fluid flows in one direction are clamped, which prevents rotational movement of the clamp plate due to fluid force. It can be prevented.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 to 5.

3 and 4 show a first embodiment of the present invention. In the drawings, the same components as in FIGS. 1 and 2 are denoted by the same reference numerals, and their explanations are omitted. are grooves drilled in the clamp plate 1, 22A and 22B are grooves bored in the clamp plate 2, and each of these grooves 21A and 22A is a semi-cylindrical groove with a slightly semi-elliptical shape. ,22
B is formed as a perfectly circular groove. By arranging the clamp plate 1 and the clamp plate 2 to face each other, the grooves 21A and 22B form an insertion hole 23A in the shape of an ellipse, and the grooves 21B and 22
A circular insertion hole 23B is formed by B, and the inner diameter of the insertion hole 23B is slightly larger than the outer diameter of the hose 6B. Then, when the hoses 6A, 6B are sandwiched between the grooves 21A, 22A, 21B, and 22B, and the clamp plates 1, 2 are tightened with bolts 9A, 9B, nuts 12A, 12B, etc., the hoses 6A, 6B are
A is pressed by the inner wall of the insertion hole 23A and is slightly deformed, and its movement in the axial and radial directions is suppressed by the elastic force of the hose 6A itself. On the other hand, the hose 6B is loosely fitted into the insertion hole 23B so as to be movable in the axial direction.

Although the clamping device of the present invention is constructed as described above, the pressure of the pressure oil flowing through the hoses 6A, 6B acts on the hoses 6A, 6B. Therefore, when hydraulic pressure is applied to the hoses 6A and 6B in opposite directions as shown by arrows A' and B' in FIG. 4, as in the prior art described above, the hose 6B is
Since the clamp plates 1 and 2 are loosely fitted, no force in the direction of arrow B' acts on the clamp plates 1 and 2. Therefore, the clamp plates 1 and 2 move together with the movement of the hose 6A, and no rotational movement occurs. Also, hoses 6A, 6B
are not subjected to friction by the corners of the insertion holes 23A, 23B, and are not damaged.

Next, FIG. 5 shows a second embodiment of the present invention, in which 31A and 31B are grooves drilled in the clamp plate 1, 32A and 32B are grooves bored in the clamp plate 2, and The grooves 31A, 31B, 32A, 32B are semi-cylindrical, and by arranging the clamp plate 1 and the clamp plate 2 facing each other, perfect circular insertion holes 33A, 33B are formed through which the hoses 6A, 6B made of rubber material or the like are inserted. has been done. Each of the insertion holes 33A, 33B has a perfect circular cross section and a diameter larger than that of the hoses 6A, 6B. An elastic ring 34 made of rubber or the like for protecting the hose is attached to the inner wall of the insertion hole 31A, and the elastic ring 34 has an inner diameter slightly smaller than the outer diameter of the hose 6A. Then, the hose 6A is inserted into the elastic ring body 34, and the elastic ring body 34 is inserted into the groove 31A.
and 32A, sandwich the hose 6B between the grooves 31B and 32B, and tighten the bolts 9A, 9B and nuts 12A, 12.
When the clamp plates 1 and 2 are tightened by B or the like, the hose 6A is pressed by the elastic ring 34, and movement of the hose 6A in the axial and radial directions is suppressed. On the other hand, the hose 6B is loosely fitted into the insertion hole 33B so as to be movable in the axial direction.

In the clamp device of this embodiment, only one hose 6A is pressed against the clamp plates 1 and 2 via the elastic ring 34, as in the first embodiment. Since rotational movement can be prevented and the hose 6A is protected by the elastic ring 34, damage to the hose 6A can also be prevented.

In each embodiment, two grooves 21A, 21B, 22A, 22 are provided in each of the clamp plates 1 and 2.
Although it has been described that grooves B, 31A, 31B, 32A, and 32B are bored, more grooves may be bored. Of course, the present invention can be applied not only when hydraulic pressure is applied to the hoses 6A and 6B, but also when an artificial external force is applied in the directions of arrows A' and B' in FIG. 4.

The clamping device according to the present invention is as described in detail above, and the hose insertion hole formed by the clamp plate is connected to a portion of the hose through which fluid flows in one direction when each clamp plate is tightened with bolts. Because the clamping force is applied to only one hose in the radial direction, and the other hose through which fluid flows can be moved in the axial direction,
Even if a force for axial movement is applied to some of the hoses due to fluid force, the clamp plate does not undergo rotational movement, so the clamp plate does not shift from its initial mounting position. Furthermore, since unnecessary friction is not applied to the hose, it is not damaged and the life of the hose can be extended.

[Brief explanation of the drawing]

1 and 2 show a clamp device according to the prior art, FIG. 1 is a front view when hoses are arranged, FIG. 2 is a perspective view thereof, and FIGS. 3 and 4 are clamps according to the present invention. A first embodiment of the device is shown, FIG. 3 is a front view when hoses are arranged, FIG. 4 is a perspective view thereof, and FIG. 5 is a fourth embodiment showing a second embodiment of the clamp device according to the present invention. It is a front view similar to the figure. 1, 2...Clamp plate, 9A, 9B...Bolt, 6A, 6B...Hose, 21A, 21B, 2
2A, 22B, 31A, 31B, 32A, 32B
...Groove, 23A, 23B, 33A, 32B...Insertion hole.

Claims (1)

[Scope of utility model registration request] By arranging a pair of clamp plates facing each other in which a plurality of semi-cylindrical grooves are bored at a predetermined interval, each of the grooves forms an insertion hole having a substantially cylindrical shape, and a hose is inserted into each insertion hole. In a clamping device in which the respective clamp plates are tightened with bolts, when the respective clamp plates are tightened with bolts, fluid flows into one of the hoses. Some of the insertion holes are shaped like ellipses to which the hose can be pressed, or to which an elastic ring can be attached so that a tightening force can be applied directly from the radial direction or through the elastic ring. The other insertion hole is formed in a perfect circle shape and has a larger diameter than the outer diameter of the hose so that the hose can move in the axial direction with respect to the other hose through which fluid flows. A clamp device characterized in that: