JPH0667992U - Dew wire type laminated hose joint - Google Patents

Abstract

(57) [Summary] [Constitution] This invention is a dew wire type laminated body hose made of an inner cloth, an outer cloth and a laminated body on the inner and outer spiral rings. Only the laminated body is sandwiched between the nipple of the metal fitting and the sleeve to ensure the sealing property.

Description

[Detailed description of the device]

[0001]

[The purpose of the device]

[0002]

[Industrial applications]

 The present invention relates to a means for maintaining the sealing property at the joint between the end part of a dew wire type laminated hose and a fitting, and more specifically, for ensuring the sealing property between both members reliably and for a long time. Regarding means.

[0003]

[Prior art]

 The invention disclosed in Japanese Utility Model Laid-Open No. 60-103781, which is the same applicant as the applicant of the present invention, is the inside and outside of the crimped portion of the hose that contacts the smooth surface of the nipple and the crimped portion of the hose that contacts the sleeve. The metal wire is removed and an elastic sealing material is inserted between the nipple and the hose or between the sleeve and the hose to ensure sealing performance. The invention disclosed in Japanese Utility Model Laid-Open No. 63-199993 relates to the improvement of the sealing technique disclosed in Japanese Utility Model Laid-Open No. 60-103781, which is based on the above-mentioned elastic sealing material having a hose end portion. It has a U-shaped cross section so that it can be covered from the outside to ensure sealing performance.

[0004]

[Problems to be solved by the device]

 The applicant of the present invention has made improvements that are different from the conventional sealability ensuring means, and has disclosed the technology regarding the hose and the fitting as Japanese Patent Application Nos. 1-142373 and 2-52451.

The hose disclosed herein has an inner spiral ring as a core material, and a continuous film having flexibility is spirally wound on the surface of the core material through an inner cloth to a desired thickness. Film stack, insert a cylindrical seamless tube into this stack, and spirally wind a film of the same effect as the above-mentioned film on the surface of this tube to form the next stack. Dew wire laminate formed by forming a body, spirally winding an outer cloth layer on the outer surface of this laminate to a desired thickness, and winding an outer spiral ring on the surface of this outer cloth layer. It is a body hose.

In addition, when this hose is attached to a fitting, the inner and outer spiral rings of the portion facing the flat surface of the nipple and the sleeve are removed, and the inner cloth of the portion contacting the nipple is removed to remove the nipple. The sealing property was secured by directly contacting the surface of the film laminate with the surface.

As a means for further improving the sealing performance, a donut-shaped hollow cylindrical body made of an elastic material such as a synthetic resin material or a rubber material is used for the film laminate of the hose, the outer cloth layer, and each surface of the nipple and the sleeve. The means to contact him was taken. Although the above-mentioned sealing property securing means yields very good results in the short term, it has a drawback in that the sealing property is deteriorated due to the compression set of the laminate caused by the passage of time and heat history. Further, the use temperature was limited to 60 ° C. This invention was made to solve this drawback.

[0008]

[Constitution of device]

 The dew wire type laminated body hose applied to this invention will be described below with reference to FIG. In FIG. 1, reference numeral 10 represents a dew wire type laminated body hose applied to the present invention (hereinafter simply referred to as “laminated body hose”). The laminated body hose 10 includes an inner spiral ring 1 and an outer spiral ring. 2, the inner cloth 3, the laminate 4, and the outer cloth layer 5, and the inner spiral wire 1 having a predetermined pitch P is used as a core material, and the inner cloth 3 is spirally wound on the surface of the core material. A continuous film 41 is spirally wound on the inner cloth 3 to a desired thickness to form a laminated body 4, and an outer cloth 51 is spirally wound on the laminated body 4 to form an outer cloth layer 5. An outer spiral wheel 2 having a predetermined pitch P is wound around the surface of the outer cloth layer 5 with a shift of about 1/2 pitch with respect to the inner spiral wheel.

The hose connecting portion applied as a connecting portion with the joint fitting according to the present invention will be described below with reference to FIG. FIG. 2 shows a hose connection, which is represented by the symbols X and Y. Reference numeral X indicates a seal securing portion, and Y indicates a hose holding portion.

As is apparent from the figure, the seal securing portion X removes the inner spiral ring 1 and the inner cloth 3 by a desired width L on the inner side of the hose, and the outer spiral ring 2 and the outer cloth on the outer side of the hose. The layer 5 is formed in a shape with a desired width K removed. The hose gripping portion Y does not particularly change the shape of the laminate hose.

The joint portion of the laminated hose according to the present invention is shown in FIG. As is clear from the figure, this joint portion is structured so as to be sandwiched by the nipple 7 and the sleeve 8 in a state where the cylindrical seal member 6 is inserted in the seal securing portion X. Further, although not particularly shown, a seal tube can be further improved by interposing a seamless tube having the same effect as the continuous film inserted in the laminate in the seal securing portion.

[0012]

[Action]

The joint portion of the laminated body hose according to the present invention is formed such that the thickness N of the seal securing portion is N ₀ > N as compared with the thickness N ₀ of the hose portion, and the seal member 6 is provided at this portion. The seal member 6 can absorb the variation in the compression set of the laminate itself forming the seal ensuring portion. Further, since the nipple 7 and the sleeve 8 can hold a sufficient gripping force with respect to the hose gripping portion Y, the connection between the hose and the joint fitting can be surely performed.

[0013]

【Example】

 The embodiment of the present invention will be described below with reference to FIG. As is clear from the figure, the seal member 6 is attached to the seal securing portion X, and only the portion where the outer cloth layer 5 is removed in order to provide the function of compensating for the difference in outer diameter from the laminated body hose 4. It's thickened. The seal member 6 is formed in a donut shape having a bag groove, and is sandwiched between the nipple 7 and the sleeve 8 in the bag groove while being attached to the seal securing portion X.

The hose grip portion Y is sandwiched by the nipple 7 and the sleeve 8 in a state where the inner spiral wheel 1 is engaged with the spiral groove lock 71 in the nipple 7. In the laminate according to the present invention, a continuous film and a seamless tube having the same effect as that of the film may be interposed between the winding layers of the film. Further, the width and thickness of the seal securing portion can be arbitrarily designed according to the embodiment, and the material shape and size of the seal member can be arbitrarily selected. The present invention is not limited to the above-mentioned embodiment, and any design, such as selection of the material of the seal member, shape or thickness of the laminated body of the seal securing portion, can be made.

[0015]

[Effect of device]

 According to this invention, since the thickness of the laminated body of the seal securing portion is such that the outer cloth layer is removed or the laminated body is formed thinner and the seal member is attached to the seal securing portion, the seal securing portion is composed. Since it is possible to absorb the compression set of the part due to plastic deformation of the resin film, the amount of strain under uniform pressure applied to the seal member can be compensated by the elastic force of the seal member. As a result, the sealing property of the part can be maintained for a long period of time. Further, in the conventional method, the continuous use temperature was limited to 60 ° C, but with this invention, the continuous use temperature was dramatically improved and it was possible to withstand a high temperature of 120 ° C.

Further, since the invention does not include any member other than the synthetic resin film and the seamless tube having the same effect as the member forming the laminate of the sealing property securing portion, the spiral wound films are not separated from each other. Has good adhesion and is optimal for ensuring the sealing property. Moreover, in the present invention, when the thickness difference between the laminated body and the seal securing portion is large, a seal member having a thick outer portion of the laminated body or a seal member on both inside and outside the hose of the seal securing portion is provided. By mounting it, it is possible to sufficiently secure the sealing property in the part.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a dew wire type laminated body hose of the present invention.

FIG. 2 is a cross-sectional view of a main part of a hose connecting portion.

FIG. 3 is a sectional view of a main part of a hose joint.

FIG. 4 is a sectional view of a main part showing an embodiment of the present invention.

[Explanation of symbols]

 1 Inner spiral ring 2 Outer spiral ring 3 Inner cloth 4 Laminated body 5 Outer cloth layer 6 Seal member 7 Nipple 8 Sleeve 41 Continuous film 51 Outer cloth X Seal securing part Y Hose gripping part

Claims (2)

[Scope of utility model registration request] 1. A joint portion of a dew wire type laminated hose, wherein the laminated body of the seal ensuring portion of the laminated body hose is formed of a continuous film and a seamless tube having the same effect as the film. 2. A joint portion of a dew wire type laminated body hose, wherein a seal member is attached to the seal securing portion according to claim 1.