JPH0755077A - Hose joint - Google Patents

Abstract

PURPOSE:To provide a hose joint having no possibility that it is worn when powder and particles are transported. CONSTITUTION:A joint 1 composed of a flange 2, a socket 5 and a coil 7 and the coil 7 are fixed on the inner peripheral surface of the socket 5 at the pitch equal to the outer peripheral surface spiral pitch of a bellows hose 10. Resin liquid 8 is injected from a hole 6 of the socket 5, so as to be hardened, after the flange 2 is screwed to the outer peripheral surface of the bellows hose 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose joint structure.

[0002]

2. Description of the Related Art Generally, as a hose for transporting liquids, powders, granules, etc., a spiral resin bellows hose having alternating peaks and troughs along its axial direction on the outer peripheral surface, such as a flexible hose A bellows hose is known in which a reinforcing body made of hard synthetic resin is embedded or attached in a spiral shape in a cylindrical body made of synthetic resin, and soft valleys and hard peaks are formed alternately along the axial direction. .

As a joint for extending this kind of bellows hose or for attaching it to a pump or a machine body, an inner cylinder integrated with a flange has been used at the end of the bellows hose as the simplest structure. A fitting in which the band is wound around the bellows hose and wound around the outer peripheral surface of the bellows to be crimped and fixed has been put into practical use. Furthermore, as an improvement of this,
As described in JP-A-24427 and JP-B-58-51496, a cylinder integrated with a flange is fitted into the end of the bellows hose, and an outer cylinder is provided on the outer peripheral surface of the bellows hose via a coil body. There is known a joint in which a bellows hose and a coil body are attached by crimping with an inner cylinder and an outer cylinder.

By the way, in each of the above-mentioned conventional joints, the metal inner cylinder is exposed on the inner peripheral surface of the hose, but there is no problem in transporting the liquid. But the seashell,
When powder or granules such as sand and shot blast are transported, the metal inner cylinder is worn before the inner surface of the hose. In order to prevent this wear, it is conceivable to make the inner cylinder thick, but this causes a large step inside the hose, which hinders transportation and increases the weight, which is not a preferable measure.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a hose joint which is not likely to be worn even if powder, granules and the like are transported. In order to achieve the above object, a joint according to the present invention comprises a flange and a socket, and the socket has a cylindrical shape in which an inner peripheral surface is provided with a spiral protrusion that can be screwed onto the outer peripheral surface of a bellows hose. , Is integrated with the flange at one end. This socket is screwed onto the outer peripheral surface of the bellows hose, and a resin liquid is injected between the socket and the bellows hose to cure it. The resin liquid to be injected here is, for example, urethane foam, which is filled in a spiral gap formed between the socket and the bellows hose and hardened. The joint is fixed to the end of the bellows hose via the resin thus cured.

In the above structure, the socket is attached to the outer peripheral surface of the hose, and the metal material is not exposed on the inner peripheral surface of the hose. Therefore, the socket will not be worn when transporting not only liquid but also powder and granules.
Further, the joint according to the present invention can be used not only for the bellows hose but also for a smooth hose having no irregularities on the outer peripheral surface. In this case, the spiral protrusion provided on the inner peripheral surface of the socket is pressed against the smooth outer peripheral surface of the hose, and the resin liquid is injected into the spiral gap and cured.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a hose joint according to the present invention will be described below with reference to the accompanying drawings. (See the first embodiment, FIGS. 1, 2 and 3) FIG. 1 shows a state in which the joint 1 is attached to the bellows hose 10, FIG. 2 shows the joint 1, and FIG. 3 shows the bellows hose 10, respectively.

The bellows hose 10 is a conventionally known one, and is a cylindrical body 11 made of soft synthetic resin or rubber.
The reinforcing body 12 made of hard synthetic resin is spirally attached and integrated to the outer peripheral surface of the. The hose 10 is a spiral bellows hose in which a soft valley portion a and a hard mountain portion b are alternately formed along the axial direction on the outer peripheral surface, and the hose 10 has flexibility due to the soft valley portion a. ing.

The joint 1 includes a disc-shaped flange 2 made of metal,
A cylindrical socket 5 made of metal and a coil 7 made of a metal spring material fixed to the inner peripheral surface of the socket 5 by welding.
It consists of and. The flange 2 has a plurality of mounting holes 3 on its outer peripheral portion, and the holes 3 are screwed to a machine body, a pump or the like. The socket 5 is integrally welded to the flange 2 at one end 5a. Coil 7 is socket 5
2 to 3 lines are provided on the inner peripheral surface of the end of the hose, and the pitch thereof is equal to the outer peripheral surface spiral pitch of the hose 10. The inner diameter of the socket 5 is slightly larger than the outer diameter of the mountain portion b of the hose 10, and the coil 7
Can be screwed onto the outer peripheral surface of the hose 10. In addition, the socket 5 is provided with holes 6 for injecting a resin liquid at one location or at a plurality of locations.

Next, the assembling method will be described. First, while the end of the socket 5 is applied to one end of the hose 10 and the joint 1 itself is rotated by hand, the coil 7 is screwed onto the outer peripheral surface of the hose 10 until the end of the hose 10 contacts the flange 2. . Next, the resin liquid 8 (urethane foam) is injected from the hole 6 of the socket 5. A preferable material for the urethane foam is a mixture of a base containing isocyanate as a main component and a curing agent containing a polyol as a main component with stirring. The resin liquid 8 is filled up to the gap between the socket 5 and the hose 10, and further to the portion where the coil 7 is screwed, and the resin liquid 8 is expanded and hardened while expanding in volume. By the hardening of the resin liquid 8, the joint 1 is firmly fixed to the end of the hose 10.

(Second Embodiment, See FIG. 4) This second embodiment is a joint 20 for attaching to a hose 30 having a smooth outer peripheral surface. The hose 30 is formed of a soft synthetic resin or rubber into a cylindrical body, and a reinforcing member (not shown) is spirally embedded in the meat portion. The joint 20 is formed by welding the end portion of the socket 22 to the flange 21 so as to be integrated, and the socket 22 is formed by pressing so that the spiral protrusion 23 projects inward.

The joint 20 connects the end of the socket 22 to the hose 3
When it is applied to one end of the hose 0 and rotated,
While biting into the outer peripheral surface of the, screw. Then socket 2
The resin liquid 8 (the same as that of the first embodiment) is injected from the hole 24 formed in 2 and cured.

(Other Embodiments) The joint according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the gist thereof.

For example, in the first embodiment, the coil 7 may be provided on the inner peripheral surface of the socket 5 along the entire axial length or about half thereof. Further, instead of the coil 7, as shown in FIG. 5, the socket 5 may be pressed to form the spiral protrusion 9.

[Brief description of drawings]

FIG. 1 is a half sectional view showing a first embodiment of the present invention.

2 is a cross-sectional view of the fitting shown in FIG.

FIG. 3 is a half cross-sectional view of the hose shown in FIG.

FIG. 4 is a half sectional view showing a second embodiment of the present invention.

5 is a cross-sectional view showing a modified example of the socket of the joint shown in FIG.

[Explanation of symbols]

 1, 20 ... Joint 2, 21 ... Flange 5, 22 ... Socket 6, 24 ... Injection hole 7, 9, 23 ... Spiral protrusion 10, 30 ... Hose

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Seiji Hattori, 6th Danyo, Kakegawa City, Shizuoka Prefecture Tigers Polymer Co., Ltd. Shizuoka Factory

Claims (3)

[Claims] 1. A joint attached to the end of a spiral bellows hose having alternating peaks and troughs along the outer peripheral surface in the axial direction, a flange, and an outer peripheral surface of the bellows hose on the inner peripheral surface. And a cylindrical socket having one end integrated with the flange, wherein the socket is screwed onto the outer peripheral surface of the bellows hose,
A hose joint characterized by injecting a resin liquid between the socket and the bellows hose to cure it. 2. A joint to be attached to an end of a hose having a smooth outer peripheral surface, wherein a flange and a spiral protrusion capable of being crimped to the outer peripheral surface of the hose are provided on the inner peripheral surface, and one end is integrated with the flange. And a cylindrical socket, wherein the socket is pressure-bonded to the outer peripheral surface of the hose, and a resin liquid is injected between the socket and the hose to cure the hose. 3. The joint according to claim 1, wherein a hole for injecting a resin liquid is formed in the socket.