JP2525226Y2 - Joint structure between dew wire type laminated body hose and fitting - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a joint structure between a dew wire type laminated hose and a joint fitting, and more specifically, a fastening used when joining the hose to the joint fitting. The present invention is applied to a joining structure that functions so that the pressing force (fastening force) in the hose side direction of the use sleeve becomes substantially uniform at any part of the hose where the fastening force acts.

[Prior Art] Regarding the means for connecting a fitting to a dew-line type laminated hose, the applicant of the present application has disclosed Japanese Utility Model Application No. 1-142373 (Japanese Utility Model Application Laid-Open No.
No. 81478), and the outline of the disclosed technology will be described below with reference to FIG.

The dew-wire type laminated body hose 10 is formed by winding the laminated body 20 around the inner spiral ring 1 via the inner cloth 11 with the inner spiral ring 1 as the core, and winding the outer cloth 21 on the outer surface of the laminated body. The outer spiral ring 2 is formed by crimping.

The laminate 20 includes a continuous film 12 wound on an inner cloth 11 to a desired thickness, and a seamless tube 13 inserted into the film.
And a continuous film 12 wound around the tube to a desired thickness.
And an inner cloth wound as required, and a continuous film 12 wound around the inner cloth with a desired thickness.

When connecting the hose 10 to the fitting 50, use a hose
The tip thin portion K, which is a portion for ensuring the sealing property, of the tip portion of the 10 is formed by removing the inner and outer spiral rings and the inner cloth, and the sealing member 40 is attached to this portion to form the nipple portion 51. Insert,
The fastening spiral loop portion M provided with the inner and outer spiral loops connected to this portion is connected by the pressing force of the cylindrical wall 31 of the sleeve 30 by swaging.

[Problems to be solved by this invention]

When connecting the dew-wire type laminated body hose to the joint fitting, as shown in FIG. 7, the cylindrical wall 31 of the sleeve 30 is caulked in the center direction to connect the hose tip thin portion K and the fastening screw portion M to the cylindrical wall. 31
And the nipple portion 51 are pressed and connected in a sandwiched manner, but the pressing portion of the hose has a thin portion K from which the inner and outer spiral rings are removed and a fastening with the inner and outer spiral rings. Normally, caulking can only be performed so that the amount of caulking in the core direction is the same for both portions of the spiral portion M. Therefore, the thin-walled tip portion K having no inner and outer spiral rings and the presence of the inner and outer spirals are provided. As a result, the fastening force with respect to the fastening screw portion M becomes non-uniform, and as a result, the pressing force at the portion of the thin end portion K is insufficient, and a problem occurs in securing the sealing performance.

In order to solve the above problem, as shown in FIG. 7, the wall thickness of the cylindrical wall portion 32 of the sleeve in contact with the thin portion K of the hose is changed to the wall thickness of the cylindrical wall portion 33 in contact with the fastening screw portion M. The nipple portion is provided with a step difference in the shaft diameter 52 with respect to the thin end portion K so that the pressing is uniform.

This invention applies a uniform pressing force to the laminated body in both the thin portion K of the hose tip and the fastening screw portion M even when the amount of caulking in the core direction with respect to the cylindrical wall 31 of the sleeve 30 is the same. It is intended to provide a joining structure that can be added.

[Means for solving the problem]

As shown in FIG. 1, the present invention is based on a sleeve 30 in which a cylindrical wall 31 has the same flat surface, that is, an equal wall thickness.
Can be joined to the joint 50, and the joining member 40 is interposed in the thin end portion K so that a uniform pressing force can be applied to the laminate 20 between the thin end portion K and the fastening screw portion M. It was made.

The basic shape of the joining member 40 will be described below with reference to FIG.

The joining member 40 evident from the figure is formed as a donut-shaped hollow cylindrical body 41 using a flexible material such as a synthetic resin material or a rubber material. The hollow hole 42 of the hollow cylindrical body is formed so as to adapt to the nipple portion when it is inserted into the nipple portion 51 shown in FIG. The cylindrical wall 43 is formed with a concave groove 44 into which the thin end K of the laminated hose is inserted.

Reference numerals 45 and 46 indicate the inner and outer groove walls of the concave groove 44, respectively.

Referring to FIG. 3, the joining procedure for joining the laminated body hose to the joint fitting will be schematically described below in relation to the joining member.

(A) As shown in the figure, the thin portion K of the laminated body hose 10 is inserted into the concave groove 44 of the joining member 40. Next, (b) the end of the hose with the joining member in the state shown in (a) shown above is inserted into the nipple portion 51 of the joint 50 having the sleeve 30 as shown in the figure. Next, the caulking device W is operated in the direction of the arrow to caulk the cylindrical wall 31 of the sleeve 30 toward the core.

In this way, as shown in FIG. 3 (c), the joint N (K + M portion) of the hose having the thin-walled end portion K and the fastening screw portion M with the joining member 40 interposed therebetween is different from each other. It is pressed and held between the portion 51 and the sleeve cylindrical wall 31 in a sandwiching manner. At this time, the outer surface of the nipple is formed as a flat surface.

[Action]

As described with reference to FIG. 3, when the joint portion N of the laminated hose is joined to the nipple portion 51 of the joint, a sleeve is used.
The cylindrical wall 31 of the hose 30 is crimped in the core direction, and the joint N of the hose is pressed and held between the nipple portion 51 and the sleeve 30 in a sandwiching manner. Is constant at any position, the pressing and pinching force against the thin portion K at the tip where no inner and outer spiral rings and inner cloth are present, and
Although the pressing and holding force against the fastening screw portion M with the outer spiral ring is not uniform in principle, a material in which the physical properties and shape of the joining member 40 interposed in the thin portion at the tip are selected and designed is selected. By using this, the sandwiching pressing force applied to the laminate 20 (see FIG. 1) existing in the joint portion N can be made uniform.

〔Example〕

An embodiment of the joining member according to the present invention will be described with reference to FIG. The same reference numerals in FIG. 2 as those in FIG. 2 denote the same members.

As shown in FIG. 4 (a), which is an enlarged view of a main part of FIG. 4 (a), in this embodiment, the shape of the cylindrical wall 43 is formed as follows.

First, the concave groove 44 for insertion of the thin portion at the tip is formed so that the groove depth becomes L, and the concave groove side surface 47 of the outer wall 45 of the groove is inclined such that it expands toward the opening side. It is formed to have β.

Further, the surface of the outer wall 45 is formed as a horizontal surface portion 49 over the width 1 from the opening end, and is further inclined from the end point P of the horizontal surface portion toward the bottom side of the concave groove by an angle α in the reduction direction. Is formed as an inclined surface portion 48.

The groove depth L of the concave groove 44 and the width l of the horizontal plane portion 49 are formed so that L> l. Moreover, the outer wall 45 is formed such that the thickness of the outer wall 45 at the point P is maximized.

The usage of this embodiment will be described with reference to FIG.

When the intersection P between the horizontal surface portion 49 and the inclined surface portion 48 of the outer side wall 45 is pressed and sandwiched between the nipple portion 51 and the cylindrical wall 31 of the sleeve, the thickness just below the point P is formed to be thicker than the other wall thickness. Therefore, the above-described pinching force immediately below the point P is greater than that of other parts, and the pinching force acts on the laminated body 20 by applying a chain line pressure indicated by the symbol P ′ in FIG. Become.

In the case of this embodiment, the inner spiral ring is engaged with the concave ridges 55 and 35 formed on the nipple 51 and the cylindrical wall 31 of the sleeve, respectively, to prevent the laminated hose from being pulled out. .

Another Embodiment FIG. 6 shows another embodiment. In this embodiment, the joint member 40 according to the present invention is used to reduce the shaft diameter of the nipple portion of the joint fitting without a step. Since the smooth shaft 52 can be used, the loose nut 60 having a specified screw diameter corresponding to the inner diameter of the laminated hose can be freely mounted.

[Effect of the invention]

According to the present invention, a smooth sleeve or a nipple having no step in the shaft diameter can be used for the hose-side cylindrical wall, so that the sleeve or the nipple can be easily processed.

According to this invention, a joining member is interposed in a thin portion at the end where no inner or outer spiral ring exists, and this portion and a fastening screw portion with inner or outer spiral ring are simultaneously formed using the above-mentioned sleeve. Even if the amount is caulked, a substantially uniform pressing force can be applied to both portions.

The present invention also provides a horizontal surface portion having a width smaller than the groove depth of the concave groove formed on the outer wall of the cylindrical wall of the joining member, and forming the horizontal surface portion on the inclined surface portion as an intersection point. The outer wall of the hose is formed so as to have a maximum thickness compared to other portions, so that the pressing force immediately below the intersection causes a linear pressing force to act on the hose laminate. Therefore, as a result, the sealing property of the laminate in the linear portion is further improved.

In addition, according to the present invention, the surface of the nipple portion of the joint fitting can be formed as a shaft diameter having no step by inserting a desired joining material into the thin portion of the end of the hose, so that a loose nut is assembled to the nipple portion. When attaching, the loose nut can be easily inserted without performing crimping of the loose nut as conventionally performed.

In addition, according to the present invention, the inner and outer spiral rings, particularly the inner cloth and the thin portion at the end where no inner cloth is present are inserted into the concave groove of the joining member, and then the joining member is inserted into the nipple. The thin portion at the tip end, which is easy to fray, can be handled without fraying, so that the joint work can be easily performed. In addition, since the inner cloth is removed, it is possible to prevent the liquid from seeping out due to the capillary phenomenon derived from the presence of the inner cloth, so that the sealing property can be further ensured.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a joint structure using a joining member having a basic shape according to the present invention, FIG. 2 is a sectional view of a basic shape of the joining member according to the present invention, and FIG. FIG. 4 is a model diagram for explaining an assembling procedure when connecting a laminated body hose and a joint fitting using members, and FIG. 4 shows an embodiment of a joining member according to the present invention. ) Is an enlarged sectional view of a main part, FIG. 5 is a cross-sectional view of a main part of a joint structure using an embodiment of the joining member according to the present invention, and FIG. 6 is a sectional explanatory view of a main part of another embodiment of the present invention. FIG. 7 is a sectional view of a joint structure shown as a conventional example. 1: inner spiral loop, 2: outer spiral loop, 10: laminated hose, 11: inner cloth 12: continuous film, 13: seamless tube, 14: middle cloth 20: laminated body, 21: outer cloth, 30: Sleeve 31 (32, 33): sleeve cylindrical wall, 40: joint member 41: hollow cylinder, 42: hollow hole, 43: joint member cylindrical wall 44: concave groove, 45 (46): concave groove Groove wall, 48: Inclined surface 49: Horizontal surface, 50: Joint fitting L: Depth of groove, l: Width of horizontal surface, K: Thin portion of hose tip M: Fastened screw, N: Hose Joint, P: Intersection P ': Action line of linear pressure

Claims (2)

(57) [Scope of request for utility model registration] An inner spiral ring is used as a core material, and an inner cloth and a continuous sheet are spirally wound around the core to form a laminated body. An outer spiral ring is spirally wound around the laminated body with an outer cloth interposed therebetween. When attaching the exposed dew-line type laminated hose to the joint fitting, a part of the end of the hose is formed into a thin portion at the end where the inner and outer spiral rings and the inner cloth are removed, and is attached to the cylindrical wall of the joining member formed in a donut shape. The nipple portion corresponding to the caulked portion where the thin portion at the tip is inserted into the provided groove and the portion and the fastening helical portion where the inner and outer helical rings are present is formed as a flat surface with no step. A joint structure in which the exposed wire laminated hose and the joint fitting are joined by press-clamping between the formed nipple portion and the sleeve. 2. The concave groove of the donut-shaped joining member according to claim 1 has an inclination angle β such that the concave groove side surface of the outer wall of the groove expands toward the opening side. And forming the surface of the outer wall as a horizontal surface portion over a predetermined width from the opening end, and forming an inclined surface portion having an inclination angle α in the reducing direction from the end point of the horizontal surface portion toward the bottom side of the concave groove. Characteristic joint structure between dew-line type laminated hose and fittings.