JP2001108174A - Connecting structure of knitted reinforced hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a fiber reinforced layer from slipping out of a caulking cap. SOLUTION: An elastic cap 4 which can be elastically deformed and has frictional resistance is interposed between the connecting end part 2a of a fiber reinforced layer 2 and a caulking cap 3. These caulking cap 3 and elastic cap 4 are caulked, whereby the inner peripheral surface 4a is pressed to the surface of the connecting end part 2a of the fiber reinforced layer 2 by repulsive force of the compression deformed elastic cap 4, and frictional resistance between both members is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of a braided reinforced hose which is used for supplying water to a washing machine or the like and which is excellent in pressure resistance. Specifically, the outer periphery of the hose body is coated in a non-adhered state with a reinforcing fiber layer woven in a tubular shape, and the connection end is covered with a caulking cap and caulked, so that the hose body and the reinforcement are provided on the outer periphery of the hose nipple. The present invention relates to a connection structure of a braided reinforcing hose to which a fiber layer is fixed.

[0002]

2. Description of the Related Art Conventionally, as this kind of braided reinforcing hose, for example, as disclosed in Japanese Patent Application Laid-Open No. 11-201341, a hose body is made of a soft synthetic resin inner tube and a hard tube wound spirally around its outer periphery. It is made of a synthetic resin reinforcing wire, and the outer periphery of the reinforcing wire is covered in a non-adhered state with a reinforcing fiber layer in which a monofilament is woven in a cross shape, and between the pitches of the reinforcing wire, the outer circumference of the inner tube is outward. Some are still inflated. Further, as disclosed in Japanese Patent Application Laid-Open No. H10-160063, the hose body is a tube made of at least one or more layers of material, and the outer periphery thereof is coated with a reinforcing fiber layer in which resin monofilament fibers are knitted in a non-adhered state. There is something. When connecting these braided reinforcing hoses to the hose nipple, the connection end of the hose body is inserted around the outer periphery of the hose nipple with a metal caulking cap placed over the connection end of the reinforcing fiber layer. By caulking the cap, the hose body and the reinforcing fiber layer were fixed to the outer peripheral surface of the hose nipple.

[0003]

However, in such a conventional connection structure of a braided reinforcing hose, since the contact surface between the caulking pipe and the reinforcing fiber layer is merely in surface contact and is slippery, the reinforcement is difficult. If a force acts on the fiber layer in the direction of pulling it out of the caulking pipe, it will come off easily. Once the reinforcing fiber layer comes off from the caulking pipe, the connection end of the hose body is exposed, and the pressure resistance performance of this exposed portion is significantly reduced as compared with other coated portions, and there is a risk of puncturing. There is a problem that the hose nipple easily comes off from the hose body. In particular, when used as a washing machine water supply hose, water supply to the washing machine is frequently stopped by the solenoid valve, so that a water hammer is generated each time, and the internal pressure of the hose body rapidly rises. There is a problem that the main body alternately repeats expansion and contraction, and the reinforcing fiber layer is more easily removed. Further, there is a problem that the permanent deformation at the time of crimping directly affects the hose main body, so that the hose main body in contact with the hose nipple is easily damaged, and the temporal change causes the hose main body in contact with the hose nipple to be distorted and leak easily. In addition, when the caulking cap is put on the connection end of the reinforcing fiber layer, the two ends come in contact with each other, so that the tip of the fiber is not only loose and it is difficult to insert the caulking cap, but also the caulking cap is not attached to the loose tip of the fiber. Even if the cap is crimped and pressed, the fibers at the tip ends that are loose are easily aligned in the pulling-out direction of the reinforcing fiber layer, so that there is a problem that the frictional resistance is reduced and the reinforcing fiber layer easily comes off from the caulking cap.

An object of the present invention is to prevent a reinforcing fiber layer from coming off from a caulking cap. A second aspect of the present invention has an object to eliminate a tip portion in which fibers are loose, in addition to the object of the first aspect. The third aspect of the present invention has the object of simplifying the mounting of the elastic cap since the tip of the fiber is prevented from being scattered, in addition to the object of the first or second aspect of the present invention.

[0005]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, an elastically deformable friction member is provided between a connection end of a reinforcing fiber layer and a caulking cap. The present invention is characterized in that a cylindrical elastic cap having a large force is interposed, and the caulking cap and the elastic cap are caulked. The invention described in claim 2 is claim 1
In the configuration of the described invention, the elastic cap is placed over the connection end of the reinforcing fiber layer, and the tip side from the middle of the elastic cap,
It is characterized in that a configuration is provided in which the hose is cut together with the tip of the hose body and the reinforcing fiber layer. The invention according to claim 3 is
The invention according to claim 1 or 2 is characterized in that the elastic cap has a configuration in which the elastic cap is formed in a cylindrical shape in which a slit is partially cut in a circumferential direction.

[0006]

According to the first aspect of the present invention, an elastic cap that is elastically deformable and has a large frictional resistance is interposed between the connection end of the reinforcing fiber layer and the caulking cap, and the caulking cap and the elastic cap are caulked. The resilient force of the elastically deformed elastic cap presses the inner peripheral surface of the elastic cap against the surface of the connection end of the reinforcing fiber layer and increases the frictional resistance between the two. According to a second aspect of the present invention, in the configuration of the first aspect, the elastic cap is placed on the connection end of the reinforcing fiber layer, and the distal end side of the elastic cap is connected to the hose body and the distal end of the reinforcing fiber layer. With the addition of the cut configuration, by cutting the elastic cap covering the connection end of the reinforcing fiber layer from the middle, the loose tip of the fiber generated with the attachment of the elastic cap becomes the tip of the elastic cap. Truncated with the side. According to the third aspect of the present invention, in addition to the configuration of the first or second aspect, the elastic cap is formed in a cylindrical shape in which a slit is partially cut in a circumferential direction. By covering the connection end portion of the reinforcing fiber layer while expanding the diameter, the elastic cap can be attached without contact with the tip portion of the fiber that tends to be loose.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIGS. 1 and 2, a hose body 1 has an inner tube 1a made of a soft synthetic resin, and a reinforcing wire 1b having a semicircular or circular cross section made of a hard synthetic resin spirally wound around the outer periphery thereof. The reinforcing wire rod 1b has a monofilament (m
Onofilament: monofilament) is coated in a non-adhesive state on the reinforcing fiber layer 2 woven in a tubular shape to form a woven reinforcing hose A, and the connecting end 2a of the reinforcing fiber layer 2 is covered with a caulking cap 3 and caulked. Thus, it is connected to the hose nipple B.

An elastic cap 4 is interposed between the connection end 2a of the reinforcing fiber layer 2 and the caulking cap 3, and the caulking cap 3 and the elastic cap 4 are connected to the hose nipple B via the hose body 1. It is swaged around the circumference.

The elastic cap 4 is made of a material which is elastically deformable and has a large frictional force, such as rubber or synthetic resin, and is formed in a cylindrical shape as shown in FIG. By making the inner diameter substantially the same as the outer diameter of the reinforcing fiber layer 2 and covering the connecting end 2a of the reinforcing fiber layer 2, the inner peripheral surface 4a is brought into contact with the surface of the connecting end 2a, The caulking cap 3 is put on the surface 4b.

As shown in FIG. 1, if necessary, the inner peripheral surface 4a of the elastic cap 4 is fitted with the outer peripheral shape of the hose body 1, that is, the inner tube 1a and the reinforcing wire 1b spirally wound therearound. The spiral recess 4d to be combined may be formed in advance.

The caulking cap 3 is a rigid material which deforms with a hydraulic tool having a conventionally known structure, such as aluminum, but does not recover and deform due to the repulsive force from the elastic cap 4. It is formed in the same or slightly larger cylindrical shape. Further, as shown in FIGS. 1 and 2, the distal end 3 a of the caulking cap 3 is bent inward along the distal end surface of the hose body 1.

On the other hand, the hose nipple B is made of a hard synthetic resin, metal, or the like. In the case of the illustrated example, the hose nipple B has a bamboo shoot-shaped hose connection tube B1 at one end in the axial direction and another end at the other end. In order to connect to the machine, a cylindrical connecting tube portion B2 is protruded, and a connecting portion B3 such as a screw is formed on the outer peripheral surface thereof.

Next, a connecting procedure of the braided reinforcing hose A will be described. First, as shown in FIG. 2A, an elastic cap 4 is put on the connection end 2a of the reinforcing fiber layer 2. Thereafter, as shown in FIG. 2B, the distal end 4 c is cut from the middle of the elastic cap 4 together with the distal end of the hose body 1 and the reinforcing fiber layer 2.

As a result, the loose end portion 2b of the fiber generated when the elastic cap 4 is attached is cut off together with the front end 4c of the elastic cap 4. As a result, the tip portion 2b in which the fibers are scattered can be eliminated, and the detachment of the reinforcing fiber layer 2 due to the scattered fibers can be prevented.

Thereafter, as shown in FIG. 2C, the caulking cap 3 is put on the remaining elastic cap 4, and in this state, the inner peripheral surface of the hose main body 1 is placed on the inner peripheral surface of the hose body 1 as shown in FIG.
After the hose connection tube portion B1 of the hose nipple B is inserted, the caulking cap 3 and the elastic cap 4 are caulked 3b with a hydraulic tool as shown by a two-dot chain line in FIG. Connect the reinforcement hose A and the hose nipple B.

Thus, the elastically deformed elastic cap 4
The inner peripheral surface 4a is connected to the connection end 2 of the reinforcing fiber layer 2 by the repulsive force of
While being pressed against the surface a, the frictional resistance between them increases. As a result, it is possible to prevent the reinforcing fiber layer 2 from coming off from the caulking cap 3.

At this time, the inner peripheral surface 4a of the elastic cap 4
When the spiral uneven portion 4d that fits with the outer peripheral shape of the hose main body 1 is formed in advance, the connection end 2a of the reinforcing fiber layer 2 can be pressed against the outer peripheral surface of the hose main body 1 with a substantially uniform pressure, Leaks can be completely prevented.

The connection end 2 of the reinforcing fiber layer 2 described above
When the elastic cap 4 is put on the a, a maximum diameter inner peripheral portion of the truncated cone-shaped guide is attached to the distal end portion 2 of the reinforcing fiber layer 2 although not shown.
If the elastic cap 4 is passed along the outer peripheral surface of the guide while being held immovably over the guide b, the fiber can be covered while preventing the tip of the fiber from scattering.

The shape of the elastic cap 4 is shown in FIG.
2A is not limited to the cylindrical body as shown in FIG.
The slit 4s may be cut out in a part of the cylindrical body in the circumferential direction as shown in FIG. In this case, by covering the connection end 2a of the reinforcing fiber layer 2 while expanding the diameter of the elastic cap 4 with the slit 4s, the elastic cap 4 can be attached without contact with the tip end of the fiber that tends to be loose. As a result, the attachment of the elastic cap 4 can be simplified without preventing the fiber ends from being scattered.

On the other hand, FIG. 3 shows another embodiment of the present invention, in which the hose body 1 is a tube 1c made of at least one layer of material, and a monofilament is provided on the outer periphery of the tube 1c. 1 and 2 is different from the embodiment shown in FIGS. 1 and 2 in that the reinforcing fiber layer 2 woven in the shape is covered in a non-adhered state to form a woven reinforcing hose A. And the same as the embodiment shown in FIG. In the illustrated example, the hose body 1 is 1
It is not limited to the tube 1c of the layer, and the same applies to a tube in which a plurality of materials are laminated.

Therefore, the one shown in FIG.
Since the outer peripheral surface of the hose is smooth, the connection end portion 2a of the reinforcing fiber layer 2 can be applied to the outer peripheral surface of the hose body 1 with a substantially uniform pressure without forming an uneven portion on the inner peripheral surface 4a of the elastic cap 4 in advance. Can be pressed, completely preventing leakage. As a result, there is an advantage that the processing of the elastic cap 4 is simpler than the embodiment shown in FIG. 1 and FIG.

In the above-described embodiment, the caulking cap 3 and the elastic cap 4 are separate bodies. First, after the elastic cap 4 is put on, the caulking cap 3 is put on the cap, and these two are caulked. The elastic cap 4 may be integrally formed on the inner peripheral surface of the caulking cap 3 (not shown). In this case, the caulking cap 3 and the elastic cap 4 can be covered with one operation,
There is an advantage that the number of working steps can be reduced.

[0023]

As described above, according to the first aspect of the present invention, the elastic cap which is elastically deformable and has a large frictional resistance is interposed between the connection end of the reinforcing fiber layer and the caulking cap. By caulking the caulked cap and the elastic cap, the inner peripheral surface thereof is pressed against the connection end surface of the reinforcing fiber layer by the repulsive force of the compressed and deformed elastic cap, and the frictional resistance between the two increases. In addition, it is possible to prevent the reinforcing fiber layer from coming off from the caulking cap. Therefore, the contact surface between the caulking pipe and the reinforcing fiber layer is merely in surface contact, and is more slippery than the conventional one.
Even when used for a washing machine water supply hose, the connection end of the hose main body is not exposed, the pressure resistance performance is not reduced, and the hose nipple does not come off from the hose main body, thereby increasing the strength. Furthermore,
The permanent deformation at the time of caulking does not affect the hose main body due to the elastic cap, so that the hose main body is hardly damaged by that much, and the hose main body in contact with the hose nipple is not distorted due to aging and leakage can be completely prevented.

According to a second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the elastic cap covering the connection end of the reinforcing fiber layer is cut off from the middle, so that the elastic cap is attached. The loose ends of the fibers are cut off together with the front end of the elastic cap, so that the loose ends can be eliminated. Therefore, if the fibers at the dislocated tip are aligned in the direction of pulling out the reinforcing fiber layer,
As compared with the conventional one in which the frictional resistance is reduced and the reinforcing fiber layer is easily removed from the caulking cap, it is possible to completely prevent the reinforcing fiber layer from coming off due to fiber dispersion.

According to a third aspect of the present invention, in addition to the effects of the first or second aspect, the elastic cap is placed on the connection end portion of the reinforcing fiber layer while expanding the diameter of the elastic cap with the slit, so that the tip of the fiber which is easily disintegrated is formed. Since the elastic cap can be attached without contacting the portion, the attachment of the elastic cap can be easily performed without preventing the fiber tip from becoming loose.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a connection structure of a braided reinforcement hose showing one embodiment of the present invention.

2 (a) to 2 (d) are perspective views showing a production process, and FIG. 2 (a ') is a perspective view showing a modification example of an elastic cap in a production process.

FIG. 3 is a longitudinal sectional front view of a connection structure of a braided hose showing another embodiment of the present invention.

[Explanation of symbols]

A Braided Reinforced Hose B Hose Nipple 1 Hose Body 2 Reinforcing Fiber Layer 2a Connection End 3 Caulking Cap 4 Elastic Cap 4c Tip 4s Slit

Claims (3)

[Claims] An outer periphery of a hose body (1) is coated with a reinforcing fiber layer (2) woven in a tubular shape in a non-adhered state, and a connection end (2a) is covered with a caulking cap (3). In the connection structure of the braided reinforcing hose in which the hose body (1) and the reinforcing fiber layer (2) are fixed to the hose nipple (B) by caulking, the connecting end (2a) of the reinforcing fiber layer (2) is caulked. A knitting characterized in that a cylindrical elastic cap (4) which is elastically deformable and has a large frictional force is interposed between the cap (3) and the caulking cap (3) and the elastic cap (4) are caulked. Reinforced hose connection structure. 2. An elastic cap (4) is put on a connection end (2a) of a reinforcing fiber layer (2), and a tip end (4c) of the elastic cap (4) is connected to a hose body (1).
2. The connection structure for a braided reinforcing hose according to claim 1, wherein the connecting portion is cut together with a tip portion of the reinforcing fiber layer. 3. The connection structure for a braided reinforcing hose according to claim 1, wherein the elastic cap (4) is formed in a cylindrical shape with a slit (4s) cut out in a part in the circumferential direction.