JPH08121657A - Connecting device between composite hose and joint fitting - Google Patents

Abstract

PURPOSE: To reduce pressure loss to a fluid by forming the liquid contact face side of an inner spiral ring into the flat face, and forming the whole inner peripheral surface of a composite hose into the nearly smooth face. CONSTITUTION: In the case of connecting a composite hose 10 to a joint fitting 20, an exposed laminated body X of a length L excluding inner cloth 31 and inner-outer spiral rings 1, 2 at a composite hose tip part corresponding to a nipple body part is formed and inserted between a nipple and a sleeve through a seal member S. In the composite hose 10 positioned in the other hollow part of both the nipple and sleeve, the liquid contact face side flat face 11 of the inner spiral ring 1 is brought into contact with the flat strip 62 connected to the inclined face 61 of the sawtooth protrusion 6 of the nipple, and the outer spiral ring 2 is brought into contact with the cylinder part interior of the sleeve. In this state, clamping and tightening are performed. At this time, fastening force in the direction of clamping the laminated body 3 is generated to the laminated body 3 between the inner and outer spiral rings 1, 2 so as to enable fastening without dislocation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose and a fitting for a composite hose, and particularly for facilitating insertion of the composite hose into the fitting and for directing a contact force of the inner spiral ring of the hose to the fitting in a vertical direction. The present invention relates to a connecting device for connecting a composite hose and a fitting. Moreover, the present invention is intended to be applied to a composite hose using an internal spiral wire that flattens the entire inner surface of the hose of the composite hose.

[0002]

2. Description of the Related Art The applicant of the present application is Japanese Patent Application No. Sho 58-196.
No. 390 (No. Shokai 60-103781) discloses a technology regarding a fitting for a composite hose,
The present invention relates to an improvement of the above-mentioned joint fitting.

The outline of the joint fitting of the composite hose will be described below with reference to FIG. In the figure, 10 is a composite hose.
Is formed so as to hold the laminated body 3 in a sandwiched state by the inner spiral ring 1 and the outer spiral ring 2. The joint fitting 20 is formed by the nipple 7 and the sleeve 8, and the composite hose 10 is fixed between the nipple 7 and the sleeve 8 so that the inner spiral ring 1 is fitted in the spiral groove 6 formed in the nipple 7.

[0004]

In the case of the above disclosed technique, as shown in FIG. 6, when the inner spiral ring 1 having a circular cross section is fitted in the sawtooth spiral groove 6, two contact points a of the groove wall, When the nipple 7 and the sleeve 8 are pressed against each other because the horizontal positions are different from each other in b, pressure is applied in the direction of arrow N (non-vertical direction) to the vertical force M by the outer spiral wheels 2 and 2, and the layers are stacked. This will tend to reduce the tightening force on the body 3.

The present invention seeks to provide a composite hose and a fitting for the hose that obviates the above tendency.

[0006]

The basic structure of a composite hose and a fitting according to the present invention is shown in FIGS. 1 and 2 as follows. A composite hose indicated by reference numeral 10 in FIG. 1 has an inner spiral ring 1 as a core material, and a film having a synthetic resin as a main material is wound around the inner spiral ring in multiple layers to form a laminated body 3. The outer spiral ring 2 is formed on the surface of the structure.

The laminated body 3 has an inner spiral ring 1 having a flat liquid contact surface side as a core, and an inner cloth 31 is wound on the core 3 by directly contacting the core. A film layer 32 formed by spirally winding a polypropylene film in the right or left direction is formed on the surface of the inner cloth. In addition, a polypropylene seamless tube 33 is inserted into the film layer 32,
A film 34 made of polypropylene is wound around the surface of the seamless tube 33, and a first reinforcing cloth layer 35 made of polypropylene is wound around the surface of the film 34. Further, a film made of polypropylene is wound on the surface of the cloth layer to a desired thickness. Then, the film layer 36 is formed by winding. In addition, a second reinforcing cloth layer 37 made of polypropylene is wound around the film layer 36, and a laminate is formed when the surface of the cloth layer is covered with a jacket 38, and the outer spiral ring is formed on the surface of the jacket 38. A composite hose is formed with the two wound around.

As shown in the figure, the inner spiral ring 1 is formed with a flat surface 11 on the liquid contact surface side. Therefore, the entire inner peripheral surface of the composite hose is formed as a substantially smooth surface 5.

The joint fitting will be described below with reference to FIG. The joint fitting 20 is formed by the nipple 7 and the sleeve 8, and the flange portion 81 of the sleeve 8 is welded to a predetermined position of the nipple 7, and between the sleeve tubular portion 82 and the nipple body portion 72 serrated protrusion 6. The tip end of a composite hose (not shown) is fixed in a sandwiched manner in the hollow portion formed in (1).

A serrated projection 6 is formed as a spiral stripe on the free end of the nipple 7, and is connected to the slant end of an inclined surface 61 forming the serrated spiral stripe 6 and will be described in detail later. A flat strip 62 having a width at least approximately equal to or larger than the spiral diameter of the spiral ring is formed. Reference numeral 9 is a mounting plate.

[0011]

In the composite hose, the liquid contact surface side of the inner spiral ring is formed as a flat surface, so that the entire inner peripheral surface of the composite hose is formed as a substantially smooth surface, so that the pressure loss to the fluid can be reduced.

Further, since the seamless tube is interposed when forming the laminated body, the sealing property against the fluid can be secured. Since the nipple forming the joint fitting is formed with the serrated projection having the flat strip, the insertability to the inner spiral ring and the fastening force to the composite hose by the inner spiral ring can be made good.

[0013]

Embodiments of the present invention will be described below with reference to FIG. When the composite hose 10 is connected to the fitting 20 as shown in the figure, the body portion 72 of the nipple is
To form a dew laminated body X having a length L from which the inner and outer spiral rings and the inner cloth 31 of the composite hose end portion corresponding to are removed, and the seal member S is interposed between the dew laminated body X and the nipple 7 and the sleeve 8. The composite hose located in the other hollow portion of the both members is a flat strip 62 that connects the flat surface 11 of the inner spiral ring 1 on the liquid contact side to the inclined surface 61 of the serrated projection 6 of the nipple. The outer spiral ring 2 and the sleeve 8
It is clamped between the two members so as to be in contact with the inside of the tubular portion.

[0014]

As shown in FIG. 4, according to the present invention, the flat surface 11 of the inner spiral ring 1 on the liquid contact surface side is brought into contact with the flat strip 62 of the serrated projection of the nipple. The direction of the fastening force of the inner spiral ring 1 with respect to the laminated body 3 between the inner spiral ring 1 and the inner spiral ring 1 is N, and since it occurs in the vertical direction M, which is almost the intermediate position between the outer spiral rings 2 and 2 facing this, The fastening force can be maintained in the highest state without causing a shift.

Further, since the tip end of the composite hose is inserted while being guided by the spiral groove between the flat surface 62 and the projecting wall 63, which connects the flat surface 11 on the liquid contact surface side of the inner spiral ring to the sawtooth projection of the nipple. The hose can be easily entered. Moreover, the inner spiral ring does not move in the side-sliding direction due to the pressing force of the outer spiral ring.

Further, in the composite hose applied to the present invention, since the liquid contact surface side of the inner spiral ring is formed to be a flat surface, the entire inner peripheral surface of the hose is made smooth, so that the pressure loss can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a composite hose according to the present invention.

FIG. 2 is a sectional view of an essential part of a joint fitting according to the present invention.

FIG. 3 is a cross-sectional view of essential parts of an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a function and effect of the present invention.

FIG. 5 is a sectional view of a main part of a conventional example.

FIG. 6 is a diagram for explaining the operation of the conventional example.

[Explanation of symbols]

 1 Inner Spiral Ring 2 Outer Spiral Ring 3 Laminated Body 6 Serrated Protrusion 7 Nipple 8 Sleeve 33 Seamless Tube 61 Slope 62 Flat M (N) Fastening Direction

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F16L 33/28

Claims (1)

[Claims] 1. A composite hose formed by forming a laminate on an inner spiral ring having a flat liquid contact surface side as a core material, and winding the outer spiral ring around the laminate, and an end. Part is attached to the nipple, the body part and the nipple provided with the flat surface that is connected to the inclined surface of the serrated protrusion of the spiral strip form a joint fitting, and the flat surface that is connected to the inclined surface of the serrated protrusion is formed. A connecting device between a composite hose and a joint fitting, wherein a flat surface of the inner spiral ring on the liquid contact surface side is brought into contact.