JPH09236191A - Hose joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent leakage from a connection part by providing a sleeve having a protruded part made of a hard member in an inner peripheral part, the protruded part being engaged with the dent part of a reinforcing hose, and fastening the outer periphery of this sleeve with a fastening band in a hose joint for the reinforcing hose having a peak part and the dent part alternately in the outer periphery. SOLUTION: For using a hose joint 14, after a sleeve 17 is fixed to the outer periphery of a reinforcing hose 10, the reinforcing hose 10 is inserted into a nipple 19. At this time, since a peak part 13a for fixing the reinforcing body 13 of the reinforcing hose 10 and protruded parts 16 formed in the outer and inner peripheral parts of the sleeve 17 are formed to be helical, the reinforcing hose 10 is screwed in from its end part. Then, the hose is fastened by fitting a fastening band 18 from the outer peripheral part and at this time, since the reinforcing body 13 and the protruded parts 16 are arranged alternately, a hose main body 12 is uniformly fastened via a reinforcing thread layer 11, the fastening stress of the reinforcing hose 10 to the nipple 19 is made uniform and thus a strong resistance to pulling-out is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose joint for a spiral reinforcing hose in which a spiral reinforcing member is built in or wound, and peaks and valleys appear alternately on the outer peripheral surface.

[0002]

2. Description of the Related Art Generally, when connecting a conventional hose having ridges and valleys to the surface of another tube, the tube is inserted into the inside of the hose and then a metal band is applied from the outside. I tightened it up. However, since the reinforcing hose is provided with a hard member for reinforcement on the mountain portion, the effect of preventing the hose from coming off and preventing leakage cannot be expected unless it is strongly tightened.

Therefore, when tightened strongly, stress is concentrated on the tightening portion by the band of the reinforcing hose, and there is a drawback that the portion breaks from the stress. In order to solve this, a strip 5 made of soft synthetic resin or rubber is prepared as shown in FIG. It was proposed that the band 7 be tightened to the tubular body 8 after that.
Furthermore, as disclosed in Japanese Utility Model Laid-Open No. 52-86813, there has been proposed a method of tightening with a fitting having unevenness in accordance with the unevenness of the reinforcing hose.

[0004]

By the way, in the above-mentioned conventional hose joint, the tightening stress concentrates on the hard member forming the mountain portion of the reinforcing hose, and the soft portion of the reinforcing hose 6 and the tubular body 8 are reinforced. However, there was a drawback that it was difficult to obtain sufficient resistance to the pulling force in the axial direction due to the insufficient pressing. Further, when carrying out the above-mentioned conventional example, it is necessary to fix the strip to the trough of the hose, and therefore, the strip is coated with an adhesive and wound, or the strip is pressed against the hose trough and the outer circumference thereof is In addition, there is a problem that it requires manpower and time because it has to be manufactured and processed by winding vinyl tape or the like. Further, in the case of tightening with a joint metal fitting having unevenness as in the conventional example of (1), since the metal joint metal fitting is directly tightened, not only the reinforcing hose is easily cracked,
Due to the joining metal fittings that are tightened from both sides, the reinforcing hose is biased between the metal fittings, which rather deteriorates the sealing performance.

The object of the present invention is to solve the above-mentioned conventional drawbacks, and to provide a hose joint which is easy to manufacture and install and which can obtain sufficient pull-out resistance without damaging the reinforcing hose. To provide.

[0006]

A hose joint according to the present invention is a hose joint for a reinforcing hose having peaks and troughs alternately on its outer circumference, wherein the outer circumference is formed flat with a soft member,
The present invention is characterized in that the inner peripheral portion is composed of a sleeve in which a protruding portion that fits into the valley portion of the reinforcing hose is formed of a hard member, and a tightening band that is tightened from the outer circumference of the sleeve.

The protrusion of the sleeve is characterized by being formed in a spiral shape. The soft member is made of rubber or synthetic resin, and the hard member is made of synthetic resin. Further, the sleeve is characterized in that it is divided in the longitudinal direction.

Thus, the hose joint according to the present invention is
Since the hard reinforcement forming the crest of the reinforcing hose is fitted to the valley formed of the soft member, and the projection formed of the hard member fitted to the soft portion forming the valley of the hose is provided, tightening stress Can be made uniform and strong pull-out resistance can be obtained.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partially cutaway side view showing a usage state of a hose joint 14 according to an embodiment of the present invention, and FIG. 2 is a partially cutaway side view of a sleeve 17 used in the same hose joint. In FIG. 1, a reinforcing hose 10 to which a hose joint 14 composed of a sleeve 17 and a tightening band 18 is attached has a hose body 12 made of a soft vinyl chloride resin with a reinforcing thread layer 11 interposed between the hose body 12 and a hard vinyl chloride resin. The reinforcing body 13 is wound and fixed.

The inner diameter of the reinforcing hose 10 is about 100.
mm, and the fixed portion of the reinforcement 13 is the mountain portion 1.
Adjacent soft portions of 3a form valley portions 12a.
The peaks 13a and the valleys 12a are alternately formed, and have a spiral shape in this embodiment.

As shown in FIG. 2, in the sleeve 17, the outer peripheral portion 15 is formed of a soft member into a flat tubular shape, and the inner peripheral portion of the sleeve 17 is provided with a projecting portion 16 for fitting with the valley portion 12a of the reinforcing hose 10 as a hard member. Are integrally formed by fusion, and the dividing groove 17a is formed in the longitudinal direction. The hard member is made of hard vinyl chloride resin, and the soft member is made of soft vinyl chloride resin or rubber.

In this embodiment, the protruding portion 16 is the reinforcing hose 1.
It is formed in a spiral shape in accordance with the reinforcing body 13 of 0. Therefore, when the sleeve 17 is fitted onto the reinforcing hose 10 from the outside, the sleeve 17 is fitted to the valley 12 a of the reinforcing hose 10.
The protruding portion 16 of the sleeve 17 is fitted, and the valley portion 15a of the sleeve 17 is fitted to the mountain portion 13a of the reinforcing hose 10.

The tightening band 18 is a flat band made of metal (stainless steel or the like) fitted to the sleeve 17 and tightened from the outer periphery, and various types can be used according to the application.

Next, the operation of the hose joint configured as described above will be described. First, as shown in FIG. 1, after the sleeve 17 is fitted around the outer circumference of the reinforcing hose 10, the reinforcing hose 10 is inserted into the nipple 19 to be connected. In this embodiment, the ridges 13a and the protrusions 16 are formed in a spiral shape, so that they can be screwed in from the end of the reinforcing hose 10.

After the reinforcing hose 10 is fitted to the nipple 19, a tightening band 18 is fitted from the outer periphery of the reinforcing hose 10 and then tightened. As shown in FIG. 1, the reinforcing body 13 of the reinforcing hose 10
Since the protrusions 16 of the sleeve 17 and the protrusions 16 of the sleeve 17 are alternately arranged, the hose body 12 made of soft vinyl chloride resin with the reinforcing thread layer 11 interposed therebetween is uniformly tightened. Therefore, the tightening stress in the radial direction on the nipple 19 of the reinforcing hose 10 becomes uniform, and the dividing groove 17a serves as a tightening margin to obtain a strong pull-out resistance.

Since the tightening stress is uniform,
It is possible to prevent breakage due to stress concentration. As a result of connecting a hose using this hose joint, it was possible to withstand a water pressure of up to 16 kg / cm ² . Conventionally wrapped with a soft vinyl chloride resin body, 7-8 Kg / cm ²
It was possible to improve the pressure resistance significantly compared to the level.

FIG. 3 is a partially cutaway side view showing the second embodiment. In this embodiment, the sleeve 20 is divided into a sleeve 20a and a sleeve 20b. The sleeves 20a and 20b divided into two have an outer peripheral portion 21 formed of a soft member into a flat tubular shape, and a protrusion 22 that fits into the valley portion 12a of the reinforcing hose 10 is fused to the inner peripheral portion by a hard member. Are integrally formed.

With this structure, the sleeve 20a,
20b can be attached from the outer periphery of the reinforcing hose 10, and it is not necessary to screw it in from the end. Therefore, the mounting work becomes easy. In this embodiment, the case where the sleeve is divided into two has been described, but it may be divided into three or four. When divided, the reinforced hose 10 is attached to the nipple 19.
After inserting, the sleeve can be attached later,
Work is easy.

The present invention is not limited to the above-described embodiments, and various design changes can be made based on the technical concept of the present invention. For example, the reinforcing hose may have no reinforcing thread layer. Further, the reinforcing body may be built in the hose body.

[0020]

As described above in detail, the hose joint according to the present invention is a hose joint for a reinforcing hose having alternating peaks and troughs on the outer periphery, and the outer periphery is formed flat with a soft member. Since the inner peripheral portion is composed of a sleeve in which a protruding portion that fits with the valley portion of the reinforcing hose is formed of a hard member and a tightening band that is tightened from the outer circumference of the sleeve, The peaks and valleys of the reinforcing hose are uniformly pressed against the pipe body, and a strong pull-out resistance can be obtained. Further, by being uniformly tightened, it is possible to prevent damage to the reinforcing hose due to stress concentration and prevent leakage from the connecting portion.

When the protruding portion of the sleeve is formed in a spiral shape, it can be used for a reinforcing hose having a spiral reinforcing member.

Since the soft member is made of rubber or synthetic resin and the hard member is made of synthetic resin, it can be uniformly tightened by the tightening band. Since the sleeve is divided into a plurality of pieces in the circumferential direction, it is easy to attach the hose joint. Since the sleeve has the dividing groove in the longitudinal direction, the reinforcing hose can be effectively tightened.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a usage state of a hose joint according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of a sleeve used in the hose joint.

FIG. 3 is a partially cutaway side view showing a second embodiment of a sleeve used in the same hose joint.

FIG. 4 is a partially cutaway side view showing an example of a conventional hose joint.

[Explanation of symbols]

 10 Reinforcing Hose 11 Reinforcing Thread Layer 12 Hose Main Body 12a Valley 13 Reinforcement 13a Mountain 14 Hose Joint 15 Outer Perimeter 15a Valley 16 Projection 17 Sleeve 17a Dividing Groove 18 Tightening Band 19 Nipple 20a, b Split Sleeve 21 Outer Perimeter 22 Protrusion

Claims (5)

[Claims] 1. A hose joint for a reinforcing hose having peaks and troughs alternately on the outer circumference, wherein the outer circumference is formed flat with a soft member and the inner circumference is fitted with the troughs of the reinforcing hose. A hose joint comprising a sleeve having a protruding portion formed of a hard member, and a tightening band that is tightened from the outer circumference of the sleeve. 2. The hose joint according to claim 1, wherein the protruding portion of the sleeve is formed in a spiral shape. 3. The hose joint according to claim 1, wherein the soft member is made of rubber or synthetic resin, and the hard member is made of synthetic resin. 4. The hose joint according to claim 1, wherein the sleeve has a dividing groove in a longitudinal direction. 5. The hose joint according to claim 1, wherein the sleeve is divided into a plurality of pieces in the circumferential direction.