JPH034877Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the improvement of hoses, and is particularly applicable to hoses that are subjected to large tensile forces such as dead weight or mining machine loads, such as deep-water mining hoses.

[Conventional technology]

Conventionally, this type of hose is shown in Figure 3.
A pair of left and right terminal fittings 20 each having a flange 21 are integrally connected to both ends of a hose body 10 made of a rubber-like elastic body in which a reinforcing layer 11 and a spirally wound body wire 12 are embedded. It is made up of.

The reinforcing layer 11 mainly provides strength in the axial direction to the hose main body 10, while also providing appropriate flexibility.

However, this reinforcing layer 11, as shown in the figure,
The terminal fitting 20 is fixed by fixing rings 23 and fixing wires 13 integrally fixed to the outer peripheral surface of the connecting portion 22 at intervals.

Therefore, when used in a place where a large tensile force is applied, the number of laminated reinforcing layers 11 is increased, or a reinforcing layer made of high-strength steel cord is used, while the reinforcing layer 11 and the terminal fitting 20 are In order to increase the adhesion area of the connecting part 2 of the terminal fitting 20,
I needed to make 2 longer.

As a result, the following problems arise. That is, (a) not only is it not possible to reduce the thickness and weight of the hose body 10, but also it is not possible to utilize 100% of the tensile strength of the reinforcing layer 11.

(2) The bending rigidity of the hose body 10 is increased, and the flexibility of the hose is significantly reduced, resulting in a significant reduction in the degree of freedom for deformation.

[Purpose of the invention] The present invention was achieved as a result of studies to solve the above-mentioned problems.

Therefore, an object of the present invention is to provide an excellent hose that can be made thinner, lighter, and more flexible by devising the reinforcing structure of this type of hose.

[Structure of the idea]

That is, in the present invention, wire rope fixing protrusions are integrally formed on the outer circumferential surface of the connection part inside the flange of each terminal fitting, and wire rope fixing protrusions are spaced at a predetermined interval in the circumferential direction between each of the wire rope fixing protrusions. The gist is that a plurality of wire ropes with both ends locked are arranged, and the wire rope fixing projections near each terminal fitting and both ends of the plurality of wire ropes are covered with end rubber. It is something.

Hereinafter, the present invention will be explained in detail by way of examples with reference to the drawings.

1 and 2 show a hose according to an embodiment of the present invention, FIG. 1 is an explanatory cross-sectional view showing the main parts, and FIG. 2 is an explanatory cross-sectional view taken along the line A--A in FIG. 1.

In the figure, E denotes a flexible hose (hereinafter referred to as a hose) that can withstand tensile force and is an embodiment of the present invention.The hose main body 10 is made of a rubber-like elastic body in which a reinforcing layer 11 is embedded, and flanges 21 are attached to both ends of the hose body 10.
It is constructed by integrally connecting a pair of left and right terminal fittings 20, each having a left and right terminal fitting.

In the present invention, wire rope fixing protrusions 30 are provided on the inside of the flange 21 of each terminal fitting 20, and a plurality of wire ropes 40 are spaced apart in the circumferential direction between the wire rope fixing protrusions 30. It has been installed with the following.

To further explain this structure, the wire rope fixing protrusion 30 is fixed to the connecting part 22 constituting the terminal fitting 20 in this embodiment, as shown in FIG. As shown in the figure, mounting portions 31 for wire ropes 40 formed in a substantially U-shape are provided at intervals in the circumferential direction.

In this embodiment, both ends of the wire rope 40 are tapered so that the diameter increases toward the end, as shown in FIG.
A socket 41 is formed by casting metal such as lead into the socket. Therefore, by simply inserting each wire rope 40 into the attachment portion 31 of the wire rope fixing protrusion 30 described above, each wire rope 40 can be attached to each wire rope fixing protrusion 30 as shown in FIG. It can be installed between 30 and 30 minutes. Further, the end of the wire rope 40 and the wire rope fixing protrusion 30 are covered with end rubber 50.

Furthermore, since the wire ropes 40 described above have a smaller elongation rate with respect to tensile force than the hose body, the tensile force acting on the hose during use is borne only by each of the wire ropes 40. As a result, the hose main body 10 can be made thinner, lighter, and more flexible, while 100% of the tensile strength of each wire rope 40 can be utilized.

Next, the structure of the hose main body 10 will be explained. As shown in this embodiment, there is an inner rubber layer a, and an intermediate rubber layer b on the outer periphery of the inner rubber layer a.
A ring 12a arranged together with this ring 1
A flexible reinforcing layer 1 arranged around the outer periphery of 2a.
1, and an outer rubber layer c disposed around the outer periphery of this reinforcing layer 11.

The inner rubber layer a is made of a material that is not easily attacked by the fluid flowing inside the hose body 10.

Further, the reinforcing layer 11 is connected to the axis of the main hose E.
It is constructed by laminating reinforcing cord layers having reinforcing cords inclined with respect to Ea in a multi-layer bias structure, which can impart appropriate flexibility and also impart strength in the axial direction to the hose body 10. It's becoming like that.

Chemical fibers such as polyester cords, nylon cords, vinylon cords, etc. are used for the reinforcing cords of this reinforcing layer 11, and the inclination angle with respect to the axis Ea is generally preferably set within the range of 30° to 57°.

Furthermore, the ring 12a is made up of individual metal rings arranged at a required pitch, and mainly provides strength in the circumferential direction of the hose.
This prevents the hose from kinking when bent, and also prevents the hose from collapsing due to external pressure.

In addition, 13 in the figure is the reinforcing layer 11 mentioned above, respectively.
This is a fixed wire that fixes the terminal fittings 20 to each terminal fitting 20.

Next, to explain the structure of each terminal fitting 20 described above, as illustrated in this embodiment, there is a connecting portion 22 whose inner diameter is approximately the same as the inner diameter of the hose body 10 described above, and an outer end of this connecting portion 22. The flange 21 is integrally formed with the flange 21.

Fixing rings 23 of the reinforcing layer 11 are integrally fixed to the outer circumferential surface of the connecting portion 22 at intervals, and the fixing rings 23 and the above-mentioned fixing wires 13 are used as shown in the figure. , the reinforcing layer 11 can be securely fixed to each terminal fitting 20.

[Effect of idea]

As described above, in the present invention, wire rope fixing protrusions are integrally formed on the outer circumferential surface of the connection part inside the flange of each terminal fitting, and a predetermined interval is provided in the circumferential direction between the wire rope fixing protrusions. A plurality of wire ropes are arranged with both ends locked across the terminal fittings, and the wire rope fixing protrusions near each terminal fitting and both ends of the plurality of wire ropes are covered with end rubber. , it has the following excellent effects.

(a) During use, the tensile force acting in the longitudinal direction of the hose body can be borne by only the multiple wire ropes, and as a result, the thickness of the rubber in the center of the hose body can be made thinner, making it possible to reduce the thickness of the hose body. In addition to being able to achieve thinner and lighter weight,
100% of the tensile strength of each wire rope can be utilized.

(b) Compared to conventional multi-ply hoses, in the case of the present invention, only both ends of the wire rope are covered with end rubber, and the central part is exposed, so bending of the hose body is prevented. Rigidity can be reduced. That is, the flexibility of the hose body can be greatly improved, and as a result, the degree of freedom against deformation such as bending can be greatly increased, and durability can be improved.

[Brief explanation of the drawing]

1 and 2 show a hose according to an embodiment of the present invention, FIG. 1 is an explanatory cross-sectional view showing the main parts, FIG. 2 is an explanatory cross-sectional view taken along the line A-A in FIG. 1, and FIG. is an explanatory cross-sectional view showing the main parts of a conventional hose of this type. 10... Hose body, 11... Reinforcement layer, 20...
...Terminal fitting, 21...Flange, 30...Wire rope fixing protrusion, 40...Wire rope.

Claims (1)

[Scope of utility model registration request] In a flexible hose in which a pair of left and right terminal fittings each having a flange are integrally connected to both ends of a hose main body made of a rubber-like elastic material with a reinforcing layer embedded therein, the outer periphery of the connection part inside the flange of each terminal fitting. A wire rope fixing protrusion is integrally formed on the surface, and a plurality of wire ropes having both ends locked at a predetermined interval in the circumferential direction are disposed between the wire rope fixing protrusions, and A structure of a flexible hose that can withstand tensile force, characterized in that a protrusion for fixing a wire rope near each terminal fitting and both ends of a plurality of wire ropes are covered with end rubber.