JP2847026B2 - hose - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose, and more particularly, to an improvement in a hose having a joint for connecting to a shower head, a hot and cold water mixing tap, and the like at a side of a hose body having a predetermined length. About.

[0002]

2. Description of the Related Art When a shower head is connected to a hose tip with a cap nut or a hose is connected to a hot / water mixer tap with a cap nut, a joint to which the cap nut is engaged is fixed to the side of the hose. I have. Generally, a metal or resin bamboo shoot-shaped nipple having an outer diameter slightly larger than the inner diameter of the hose is inserted into the joint by heating the hose, and a tightening ring is pressed into the outside of the nipple mounting portion. The hose was clamped between the nipple and the tightening ring. In this case, as described above, since the outer diameter of the bamboo shoot-shaped nipple is larger than the inner diameter of the hose, the work of inserting the nipple into the hose is troublesome, requiring a long working time and increasing costs.

In order to solve the above-mentioned problems, a joint structure as shown in FIG. 7 has been proposed. The structure is such that a flanged nipple 11 is fitted to the end of a hose 10, and metal cylinders are fitted inside and outside the nipple 11, respectively.
In addition to fitting the pipes 12 and 13, the tube inserted inside is expanded radially outward to crush the hose, thereby connecting and fixing the nipple to the end of the hose.

[0004]

In the joint structure described above, the insertion of the nipple into the hose and the insertion of the metal cylinder inside and outside the nipple can be carried out smoothly without expanding the respective diameters. The insertion work is easy as compared with the above-described structure because it is set so as to be able to be inserted. However, since the tube inserted inside the nipple is expanded and the hose is crushed, the thickness of the hose that can be used is limited. That is, if the thickness of the hose is thin, the hose may be cut by crushing the inner cylinder.

Thus, in any of the above-mentioned prior arts, fixing the joint to the hose crushes and deforms the hose to apply stress, thereby increasing the relative pull-out strength between the hose and the nipple and preventing water leakage. Is what you are doing.
Therefore, there is a danger that a gap is formed in the crushed portion due to elastic fatigue or the like, and water leakage occurs because the hose is still subjected to stress at the portion where the nipple is attached.

In the case of a shower hose, one end is connected to a hot / water mixer tap via a cap nut, and a shower head is connected to the other end of the shower hose. In addition, there is a problem that the shower head side is broken at the joint portion and the flow of hot and cold water is deteriorated. As a means for preventing the hose from being broken at such a joint portion, it is conceivable to attach a break prevention device outside the joint portion. However, this is completely different from the process of attaching the joint, and is exposed to the surface later. Therefore, there is a difficulty in the appearance of the appearance, and in reality, it is actually used without a break prevention tool.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a hose with a high strength without stress and a long-term prevention of water leakage. It is an object of the present invention to provide a hose having a joint which can be maintained. Still another object of the present invention is to provide a hose having a joint structure in which the hose does not break at the joint portion.

[0008]

The technical measures taken by the present invention to achieve the above object are as follows. One end or both ends of a flexible hose body having a predetermined length is screwed to another object. In a hose to which a joint having an engaging portion that engages with a mating cap nut is attached, the joint is melted with respect to the soft hose body.
A hard synthetic resin material that can be attached to the outer peripheral surface of the end of the hose.
Has an outer tube that comes into contact with the outer peripheral surface and end surface of the end of the hose
And an outer fitting cylindrical joint that covers the end of the outer cylinder of the joint.
Part as the engagement part, and the outside of the outer cylinder of the joint and the end of the hose body
The contact surface with the peripheral surface is integrated by high frequency welding. The welding area between the resin joint and the hose is set according to the required strength. The above joint is welded to the soft hose body.
A hard synthetic resin material that can be in contact with the outer peripheral surface of the end of the hose.
The outer cylinder that touches and the inner cylinder that contacts the inner peripheral surface of the end of the hose
Having an outer peripheral surface, an end surface, and an inner peripheral surface of an end of the hose.
A double-tubular joint that covers the end of the outer cylinder of the joint.
And the outer cylinder of the joint and the outer peripheral surface of the end of the hose body.
Contact surface and the inner cylinder of the joint and the inner peripheral surface of the end of the hose.
May be integrated by high frequency welding. Change
In addition, the above joint is a hard hose that can be welded to the soft hose body.
Inside of the synthetic resin material that comes in contact with the inner surface of the end of the hose
It has a cylinder and a flange that contacts the end face of the end of the hose.
And an inner fitting cylindrical shape that covers the inner peripheral surface and the end surface of the end of the hose.
The flange of the joint is connected to the outer periphery of the hose body.
Protruding radially outward from the surface to form an engagement part,
High frequency welding of the contact surface between the cylinder and the inner peripheral surface of the end of the hose body
May be integrated.

The above resin joint may be provided with a means for preventing the hose from being broken. In this case, the inner peripheral surface of the hose body of the joint is welded to the tip of the inner cylinder in the hose body.
And the like to continuously provided a threaded旋筒to.

[0010]

According to the above means, the resin joint is integrally connected to the hose without applying stress to the hose. Since the hose and the resin joint are integrated by high-frequency welding, there is no change in the connection over time. If the resin joint is provided with a fold prevention means connected to the resin joint, the fold prevention means is disposed in the hose by installing the joint, thereby preventing the hose from breaking at the joint portion and preventing the flow rate from decreasing. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a hose integrally connected with a double cylindrical resin joint. In the drawing, reference numeral 1 denotes a soft resin hose body. so,
An engaging portion that engages with the cap nut 14 on the side of the hose body 1
The joint 2 made of a hard resin having the numeral 15 is integrally connected by high frequency welding.

The hose body 1 and the resin joint 2 are made of a weldable material, for example, the hose body 1 is made of a soft vinyl chloride resin, and the resin joint 2 is made of a hard vinyl chloride resin, polyester resin, acrylic resin, ABS resin or the like. The inner tube 2a and the outer tube 2b of the joint 2 which are formed and contact the inner and outer peripheral surfaces of the hose body 1 are welded.

An example of a method of high-frequency welding between the hose body 1 and the resin joint 2 will be described with reference to FIG. 2. A resin joint 2 is fitted to an end of the hose body 1 and the resin joint 2 is fitted. A rod-shaped electrode 3 having a circular cross section slightly smaller than the inner diameter of the joint 2 is inserted into the inside of the joint 2, and a circular hole having the same diameter as the outer diameter of the joint 2 and a slightly larger diameter is formed outside the resin joint 2. Another formed plate-shaped electrode 4 is arranged. The plate-shaped electrode 4 is configured to be vertically divided on the center line of the circular hole so as to be able to be opened and closed so that the operation of attaching and detaching the hose body 1 for high frequency welding can be easily performed. When an electric current is applied to the electrodes 3 and 4 with this device, the insulating hose body 1 and the resin joint 2 disposed between the electrodes 3 and 4 are melted and both are welded.

Although the above-described high frequency welding apparatus is in a state of contact with a member to which an electrode is to be welded, electrodes arranged inside and outside the resin joint 2 are arranged in a non-contact state with the joint 2. Then, an electric current may be applied to perform welding.

The resin joint 2 to be welded to the hose body 1 is not limited to the double cylindrical structure shown in the above-described embodiment. For example, the outer peripheral surface and the end surface of the hose body 1 as shown in FIG. 4 or an inner fitting cylindrical joint 6 covering the inner peripheral surface and the end face of the hose body 1 as shown in FIG. 4, and in FIG. 4, the end face of the hose body 1 is covered. The flange portion 6 'has an outer diameter protruding radially outward from the outer peripheral surface of the hose body 1 so that a cap nut is engaged.

FIG. 5 shows an embodiment in which the above-mentioned resin joint 2 is provided with a function of preventing the hose body 1 from being broken. The inner tube 2a of the joint is welded to the inner peripheral surface of the hose body 1 in the hose body. Slits 8 are formed at the distal end at intervals in the circumferential direction, and a plurality of divided anti-bending cylinders 7 are continuously provided.

FIG. 6 shows another embodiment in which the hose body 1 is provided with a function of preventing the hose body 1 from breaking. The inner tube 2a of the resin joint 2 is welded to the inner peripheral surface of the hose body 1. The helical tube 9 is connected to the hose, and the helical tube 9 prevents the hose body 1 from breaking. The bend preventing means shown in FIGS. 5 and 6 can be added not only to the double cylindrical joint shown but also to an internal fitting cylindrical joint as shown in FIG. Things.

[0018]

The hose according to the present invention is , as described in claims 1 to 3, connected to one end or both ends of a soft hose body having a predetermined length to be connected to another object. Since the resin joint with an engaging portion that engages with the cap nut is integrated by high frequency welding, the hose with a joint that prevents the hose from coming off without applying stress and preventing water leakage Can be provided.

Further, in the case of the structure as set forth in claim 4 , since the hose joint preventing means is integrally formed with the resin joint welded to the hose main body, the hose can be provided without separately providing a hose preventing means. Can be prevented from breaking. In addition, since the buckling prevention means is arranged in the hose, the appearance is also refreshing, and the device is suitable for a shower hose.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the hose of the present invention.

FIGS. 2A and 2B show an example of an apparatus for high frequency welding a resin joint to a hose body, wherein FIG. 2A is a longitudinal front view and FIG. 2B is a longitudinal side view.

FIG. 3 is a partially cutaway front view showing a modified example of a resin joint to be welded at a high frequency to a hose body.

FIG. 4 is a sectional front view showing another modified example of the resin joint to be welded by high frequency to the hose body.

FIGS. 5A and 5B show an embodiment in which a hose joint for preventing a hose from being broken is integrally provided with a resin joint, FIG. 5A is a longitudinal front view, and FIG. 5B is a longitudinal side view.

FIG. 6 is a sectional view showing another embodiment in which a hose joint is provided integrally with a hose joint preventing means in a resin joint.

FIG. 7 is a sectional view showing a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hose body 2, 5, 6 ... Resin joint 7 ... Bending prevention cylinder 9 ... Spiral cylinder a ... Welding

Claims (4)

(57) [Claims] 1. A hose in which a joint having an engaging portion for engaging a cap nut screwed to another object is attached to one end or both ends of a soft hose body having a predetermined length. Hard joints that can be welded to the soft hose body
The outer cylinder that is in contact with the outer peripheral surface of the end of the hose
An outer fitting cylinder having an outer peripheral surface and an end surface of an end of a hose
-Shaped joint, the end of the outer cylinder of the joint as an engagement portion,
A hose characterized in that the contact surface between the outer cylinder of the joint and the outer peripheral surface of the end of the hose body is integrated by high-frequency welding. 2. A soft hose body having a predetermined length.
Engage with cap nuts that are screwed to other objects at one or both ends
Hose fitted with a fitting with an engaging part
The joint is a hard joint that can be welded to the soft hose body.
An outer tube made of synthetic resin material that comes into contact with the outer peripheral surface of the end of the hose.
An inner cylinder that comes into contact with the inner peripheral surface of the end of the hose;
Double cylindrical shape that covers the outer peripheral surface, the end surface, and the inner peripheral surface of the end of the
A joint, wherein an end of an outer cylinder of the joint is an engagement portion;
Contact surface between the outer cylinder of the hose and the outer peripheral surface of the end of the hose body and
The contact surface between the inner cylinder of the fitting and the inner peripheral surface of the end of the hose has a high circumference.
A hose characterized by being integrated by wave welding. 3. A soft hose body having a predetermined length.
Engage with cap nuts that are screwed to other objects at one or both ends
Hose fitted with a fitting with an engaging part
The joint is a hard joint that can be welded to the soft hose body.
An inner tube made of synthetic resin material that comes into contact with the inner surface of the end of the hose.
A flange portion that comes into contact with the end surface of the end of the hose,
An inner fitting cylindrical joint that covers the inner peripheral surface and the end surface of the end of the hose
Use your hand to hold the flange of the joint to the outer peripheral surface of the hose body.
Protruding outward in the radial direction to form an engagement part, and
The contact surface of the end of the hose body with the inner peripheral surface is
A hose characterized by being integrated with (4) At the end of the inner cylinder in the above joint, a spiral
4. The method according to claim 2, further comprising a cylinder.
The hose described.