JP3046368U - Joint part of the dew-wire type laminated body hose and connection structure of this joint part and joint fitting - Google Patents

Abstract

(57) [Summary] [PROBLEMS] This invention is to form a dew-wire type laminated hose with an inner cloth, an outer cloth, and a laminated body on inner and outer spiral rings, and to form a joint at a joint between a hose end portion and a joint fitting. Only the laminate is sandwiched between the nipple and the sleeve of the metal fitting to ensure the sealing performance. SOLUTION: An inner spiral and an outer spiral layer of an exposed wire type laminated hose are removed to form a joint part, and a seal member is attached to the joint part to be connected to a joint fitting.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to a means for maintaining the sealing performance of the joint between the joint part of the dew-line type laminated hose and the fitting, and more specifically, for ensuring the sealing performance between both members for a long time. About the means.

[0002]

[Prior art]

 The invention described in Japanese Utility Model Laid-Open No. 60-103781 by the same applicant as the present applicant is based on the inside and outside of the crimped portion of the hose that contacts the smooth surface of the nipple and the hose that contacts the sleeve. The metal wire was removed, and an elastic sealing material was inserted between the nipple and the hose or between the sleeve and the hose to ensure sealing. The invention described in Japanese Utility Model Application Laid-Open No. 63-119993 relates to the improvement of the sealing technique disclosed in Japanese Utility Model Application Laid-Open No. 60-103781, and the shape of the elastic sealing material is changed to the end of the hose. Is formed in a U-shaped cross section so that it can be covered from the outside, and the sealing property is secured.

[0003]

[Problems to be solved by the invention]

 The hose disclosed in each of the above publications has an inner spiral ring as a core material, and a flexible continuous film is spirally wound on the surface of the core material through an inner cloth so as to have a desired thickness. A laminate is formed, a tubular seamless tube is inserted into the laminate, and a film having the same effect as the above-described film is spirally wound around the surface of the tube so as to have a desired thickness. The outer cloth layer is spirally wound around the outer surface of the laminate so as to have a desired thickness, and an outer spiral ring is wound around the outer cloth layer. is there.

[0004] As a means for improving the sealing performance, a donut-shaped hollow cylinder using an elastic material such as a synthetic resin material or a rubber material is attached to the surface of the nipple and the sleeve with the film laminate of the hose and the outer cloth layer. Means of contact were taken. Although the above-mentioned means for ensuring the sealing performance produces very good results in the short term, there is a drawback that the sealing performance is reduced due to the permanent compression set of the laminate caused by the passage of time and heat history. Also, the operating temperature was limited to 60 ° C. The present invention has been made to solve this drawback.

[0005] The dew-line type laminated hose applied to the present invention is described below with reference to FIG. In FIG. 1, reference numeral 10 denotes a dew-line type laminated body hose (hereinafter, simply referred to as “laminated body hose”) applied to the present invention, and the laminated body hose 10 has an inner spiral ring 1, an outer spiral ring 2, The inner cloth 3 is composed of an inner cloth 3, a laminated body 4 and an outer cloth layer 5, and the inner cloth 3 is spirally wound around the surface of the core material with the inner spiral ring 1 having a predetermined pitch P as a core material. A continuous film 41 made of a synthetic resin is spirally wound to a desired thickness to form a laminate 4, and an outer cloth 51 is spirally wound on the laminate 4 to form an outer cloth layer 5. The outer spiral ring 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 ring. Although not shown, the laminate 4 described above is sealed with a seamless tube of the same material as that of the film to ensure the sealing property.

[0006]

[Means for Solving the Problems]

 The hose connecting portion applied as a connecting portion with the fitting according to the present invention will be described below with reference to FIG. FIG. 2 shows a hose connection, where the hose connections are denoted by X and Y. Symbol X indicates a seal securing portion, and Y indicates a hose gripping portion.

[0007] As is clear 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 layer on the outer side of the hose. 5 is removed by a desired width K. The hose gripping portion Y does not particularly change the shape of the laminated hose.

FIG. 3 shows a joint portion of the laminated hose according to the present invention. As is clear from the figure, this joint has a structure in which a cylindrical seal member 6 is inserted into a seal securing portion X and is sandwiched by a nipple 7 and a sleeve 8. Although not particularly shown, a seamless tube having the same effect as the continuous film inserted into the laminated body can be interposed in the seal securing portion to further improve the sealability.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

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

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. As can be seen from the figure, the seal member 6 is attached to the seal securing portion X, and only the amount of the outer cloth layer 5 removed to provide a function of compensating the outer diameter difference from the laminated body hose 4 is provided. It is thick. The seal member 6 is formed in a donut shape having a bag groove. The seal member 6 is sandwiched between the nipple 7 and the sleeve 8 in a state where the seal securing portion X is attached to this portion in the bag groove.

The hose gripping portion Y is held between the nipple 7 and the sleeve 8 in a state where the inner spiral wheel 1 is engaged with the helical groove lock 71 on the nipple 7. In the laminate according to the present invention, a continuous film and a seamless tube made of the same material as that of the continuous film can be interposed between the wound layers of the film. The width, thickness and the like 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-described embodiment, and can be arbitrarily designed, for example, with respect to the selection of the material of the seal member, the shape, the thickness of the laminated body of the seal securing portion, and the like.

[0012]

[Effect of the invention]

 In this invention, the thickness of the laminated body of the seal securing portion is formed by removing the outer cloth layer, that is, formed by only the film layer and the tube layer, and a seal member is attached to the seal securing portion. Since the permanent compression set of the synthetic resin film due to the plastic deformation can be absorbed by the seal member, the amount of the strain under the uniform pressing force applied to the seal member is determined by the restoring force of the seal member. As a result, the sealing property of the portion can be maintained for a long period of time. In the conventional method, the limit of the continuous use temperature was 60 ° C., but the present invention drastically improved the continuous use temperature and was able to withstand a high temperature of 120 ° C.

[0013] Further, in the present invention, since a member other than a synthetic resin film and a seamless tube having the same effect as the synthetic resin film is not interposed in a member for forming a laminate of a sealing property securing portion, a spirally wound film is interposed. Has good adhesion and is most suitable for ensuring sealing performance. In addition, in the present invention, when the thickness difference between the laminate body and the seal securing portion is large, a seal member having a thickened outer portion of the laminate or a seal member on both inside and outside the hose of the seal securing portion is provided. By mounting, sufficient sealing performance at the part can be ensured.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a dew-line type laminated hose of the present invention.

FIG. 2 is a sectional view of a main part of a hose connection part.

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

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

[Explanation of symbols]

 DESCRIPTION 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)

[Utility model registration claims] 1. An inner spiral wheel 1 is used as a core material, an inner cloth is spirally wound around the core material, and a continuous film of synthetic resin is spirally wound to a desired thickness on the surface of the inner cloth. An outer wire layer is spirally wound around the surface of a laminate formed by inserting a seamless tube having the same effect as the film, and an outer spiral layer is formed by winding an outer spiral wheel around the outer fabric layer surface. When connecting the body hose to the joint fitting, a part of the length in the longitudinal direction of the laminated hose to be brought into contact with the inside of the joint fitting is joined to the inner cloth and the inner and outer spiral rings, and the inner cloth and the outer cloth layer. Characterized in that it is configured to be connected to a fitting. 2. A joint structure between a dew-line type laminated hose and a joint fitting, wherein a seal member is attached to the joint part of the dew-line type laminated body hose according to claim 1, and the joint part is joined to the joint fitting.