JP2003194273A - Flexible hose coupling pipe provided with connecting fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve fastening force in a conventional connecting means wherein uniting result is intended to be obtained by frictional force on the basis of pressing force added between a hose and a connecting fitting. <P>SOLUTION: An opening portion of a flexible hose and a connecting fitting are joined with each other by using an IH resin heater means or a connecting fitting molding means. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a flexible hose made of thermoplastic elastomer / reinforcing fiber (blade), and a resin connecting pipe joint having I / H plastic heaters built in at both ends thereof, which is directly welded and integrated using high frequency induction heating. Welded connection hose and molded cavity hose by inserting a flexible hose into the injection molded metal mold for resin connection pipe fitting and pouring the molten resin into the mold cavities with an injection molding machine. The present invention relates to a flexible connecting pipe formed with an integrated connecting pipe joint.

[0002]

2. Description of the Related Art When a synthetic resin connecting pipe joint is attached to a flexible hose made of rubber or synthetic resin, a flexible hose shown in FIG.
As shown in Fig. 2, the inner cylindrical portion 2'provided with the enlarged portion 21 'at the end.
The opening of the hose 21 'is inserted into the enlarged portion 21' of the hose, and the inner cylindrical portion 3'presses the enlarged portion 21 'and the insertion portion 11' of the hose 1'to connect the hose 1'and the connecting pipe. It was connected to the joint. In addition, 5'is a union nut. Further, although not particularly shown, the flexible hose and the connecting pipe joint were connected by using an outer crimping means.

[0003]

The conventional connecting means attempts to obtain the coupling effect by the frictional force based on the pressing force applied between the hose and the connecting pipe joint, and the tightening force is limited. Also, rubber or synthetic resin hose,
In particular, as a substitute for flexible hoses using some materials of rubber compound chemicals and vinyl chloride, which are said to cause dioxins at the time of incineration and disposal,
At the time of incineration, the development of flexible hoses made of elastomer materials such as polyolefin, polystyrene, polyester ether, etc., which are environmentally friendly, began to be developed. The conventional connection means for pipe fittings for flexible hoses using these ecologically friendly materials is to obtain the joining result by the friction force based on the pressing force applied between the hose and the connection fittings. There was a limit to the power. The conventional connection pipe joints, which had no problem in connection strength except for the flow resistance generated by the rubber / vinyl chloride hose, have an overall low physical property value of the material compared to the rubber / vinyl chloride hose, etc. It is extremely difficult to obtain a safe connection strength in the pressure breakdown test of the various hoses made of the new materials developed by the conventional connection method by frictional force based on the pressing force. In most cases, the connecting pipe joint easily comes off from these hoses in a pressure resistance test under a temperature environment of 40 ° C to 50 ° C. The present invention aims to provide a connecting pipe in which the joint surfaces of a flexible hose and a connecting pipe joint are welded to each other, and a connecting pipe in which the flow resistance of a fluid passing through the inside of the pipe is extremely small due to the shape of the connecting pipe joint. It is a thing.

[0004]

SUMMARY OF THE INVENTION The present invention, when connecting a synthetic resin flexible hose and a synthetic resin connecting pipe joint, uses a connecting pipe joint including an IH resin heater and injection molding the connecting pipe joint. In doing so, the flexible hose and the connecting pipe joint are joined by two connecting means when welding the opening of the flexible hose inserted at the same time as this molding.

[0005]

[Embodiment 1] The embodiment of the present invention will be described below with reference to FIG. As is clear from the figure, the connection pipe joint 2 is welded W to the opening 11 of the flexible hose 1 via an IH resin heater, and the connection pipe joint 2 is provided with a union nut 3. Reference numeral 4 is a seal member made of packing, an O-ring, or the like, and is for a coupling tool that is coupled to the union nut 3.

The welding means using the above-mentioned IH resin heater will be described below with reference to FIG. As is clear from the figure, the IH resin heater H is inserted inside the outer cylinder 21 of the connection pipe joint 2, and this IH resin heater is connected to a flexible hose whose surface of the opening 11 is in contact. When connecting to the pipe joint, the high-frequency magnetic field generator E is operated to induction-heat the IH resin heater H, and this heat causes a contact portion between the outer cylinder 21 of the connection pipe joint and the opening 11 of the flexible hose. It melts and solidifies and welds both members at this portion to fix both members. The IH resin heater H has a heater body 5 formed as a cylindrical body made of a synthetic resin material, as is clear from the illustration, and a powder of a conductor or a magnetic material is used as a high frequency induction heating material in the heater body. The body 51 is mixed with a desired amount of thermoplastic resin or thermoplastic adhesive resin.

[Embodiment II] Another embodiment of the present invention is shown in FIG.
The following is a description with reference to FIG. As shown in FIG. 4, the connecting pipe shown in FIG. 3 has a flexible hose 1 inserted into an injection-molding die for a connecting pipe joint, and a molten resin solution is poured into the mold cavity to form a connecting pipe joint. It is integrated with the inserted flexible hose by welding, the opening 11 of the flexible hose 1 is connected to the connection pipe joint 2, and the connection pipe joint 2 is provided with a union nut 3.
Reference numeral 4 is a seal member made of packing, an O-ring, or the like, and is for a coupling tool that is coupled to the union nut 3.

The means for welding and unifying the connecting pipe joint and the flexible hose described above will be described below with reference to FIG. As shown in the figure, a mold formed by inserting the opening 11 of the flexible hose 1 into the mandrel 62 of the lower mold 61 of the molding die 6 of the connection pipe joint 2 and forming the opening 11 and the upper mold 63. Connection pipe joint 2 formed by the cavity 64
By injecting a molten resin material into the inside, the contact portion between the connection pipe joint 2 and the opening portion 11 of the flexible hole is melted by the molten resin material, and both members of this portion are solidified and welded W to join both members. Fix it. This invention uses the IH resin heater and the injection molding and simultaneous fusion bonding method of the connecting pipe joint as a connecting means for connecting the connecting pipe joint and the flexible hose, thereby forming the connecting pipe joints at both ends of the flexible hole to obtain a predetermined length. It is possible to provide a flexible hose with a connection pipe joint for the sun.

A preferred example of the flexible hose applied to the present invention will be described below with reference to FIG.
As is clear from the figure, in the flexible hose 1, an inner hose made of a synthetic resin inner layer tube 12 and an outer layer tube 63 is formed, a reinforcing blade 14 is provided on this hose, and a synthetic resin blade is further provided on this reinforcing blade. The cover 15 is provided. Note that the structure of the flexible hose can be arbitrarily changed in design according to the usage.

[0010]

The present invention uses the IH resin heater system and the injection molding and simultaneous fusion bonding system of the connecting pipe joint when joining the connecting pipe joint made of synthetic resin and the flexible hose, thereby providing a tightness and a seal between both members. It is possible to provide a flexible hose connecting pipe having properties.

[Brief description of drawings]

FIG. 1 is a connecting pipe of a flexible hose and a connecting pipe joint joined by using an IH resin heater.

FIG. 2 is an explanatory diagram of a connecting device using an IH resin heater.

FIG. 3 is a connecting pipe of a flexible hose and a connecting pipe joint joined by using a connecting pipe joint fitting.

FIG. 4 is an explanatory view of a connecting pipe forming device.

FIG. 5 is an explanatory diagram of a flexible hose.

FIG. 6 is an explanatory diagram of a conventional example.

[Explanation of symbols]

1 Flexible hose 11 openings 2 Connection fitting 3 Union nut 4 Seal material 5 heater body 51 Conductor or magnetic material 6 mold E High frequency magnetic field generator W solidification welding

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3H017 BA02                 3H019 GA02                 3H111 AA02 BA15 BA25 CA53 CB05                       CB14 CB27 CC19 CC20 EA05

Claims (2)

[Claims] 1. A hose connecting pipe having a connecting pipe joint, wherein the opening of the flexible hose and the connecting pipe joint are welded using an IH resin heater. 2. An opening portion of a flexible hose is inserted into a molding die of a connection pipe joint, a connection pipe joint is formed by a hose opening portion and a connection pipe joint mold, and the connection pipe joint is injection molded at the same time. A hose connecting pipe having a connecting pipe joint in which members are integrally welded.