JPH07285036A - Joint metal fitting applied to caulking taper rod for hose - Google Patents

Abstract

PURPOSE:To apply a joint metal fitting to a hose with a comparatively small inside diameter without requiring any collet member by plastically deforming a comical cylinder of the joint metal fitting by means of a taper rod so as to install the joint metal fitting in the hose. CONSTITUTION:A tip part of a hose 6 is inserted and fitted between a conical cylinder 83 of an installing inner metal fitting 81 and a hose cylinder 93 of an installing outer metal fitting 91 in a joint metal fitting. To the joint metal fitting 80 in this condition, a pressing part 72 with the predetermined length L and a taper rod 70 with the predetermined diameter D are inserted into the inside of the conical cylinder 83. As a result, the conical cylinder 83 is plastically deformed into a cylindrical shape with a diameter D when the tip of the pressing part 72 of the taper rod 70 corresponds to the tip of the conical cylinder 83, and projecting bars 84 formed on the outside face of the cylinder 83 press the wall face of the hose 6 unevenly so as to cooperate with an insertion cylinder 92 for fastening the hose 6 and the joint metal fitting 80 together. Therefore, in installation of the joint metal fitting 80 to the hose 6, the conical cylinder 83 is plastically deformed only by inserting the taper rod 70 into the hollow of the installing inner metal fitting 81, so that working operation extremely facilitated as installation is carried out by using this deformation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting metal fitting and a caulking method applied to a taper rod for caulking a hose, and a mounting method by an inner caulking means using a taper rod and a collet when a fitting metal fitting is attached to a hose has been developed. However, the present invention relates to a taper rod and a fitting for attaching the fitting to a hose by using the taper rod and the fitting for fitting only to this rod, and a method of mounting the fitting.

[0002]

2. Description of the Related Art This application and the same applicant have disclosed the technology of Japanese Patent Application No. 5-287532 as a caulking jig for hoses and the like, and the outline of the jig is as follows. The caulking jig 10 shown in FIG. 6 is composed of a collet-shaped embossing tool 1 and a taper rod 2, and the embossing tool 1 has a base 1
Tapered portions other than 1 are formed as a plurality of collet portions 12, and a plurality of uneven shapes 13 are provided at the tip portion of the collet portions. The taper rod 2 is inserted into the embossing tool 1 described above to expand the collet portion 12 outward, and includes a rod base portion 21 and a taper rod 22.

The case where the above-described caulking jig is applied to a hose fitting (joint fitting) will be described below with reference to FIG. Inner tube fitting 4 with a joint 5 at the open end of the hose 6
The inner cylinder portion 42 of the inner cylinder 42 is inserted into the inner cylinder 42 of the embossing tool collet portion 12 at the tip of the hose in this state.
Set so that it touches. In this state, if the taper rod 2 shown in FIG. 7 is moved in the direction of the arrow, the collet portion 12 is expanded in the radial direction by the taper rod 22, and as shown in the figure, the projection 13 of the collet portion is formed on the inner cylinder portion 43. Then, the hose fitting (joint fitting) 20 is attached to the hose 6.

[0004]

The above-mentioned caulking means disclosed as means for attaching a fitting fitting to a hose is performed by using a taper rod and a collet-shaped embossing tool (collet). Since both members of the collet are inserted, if the inner diameter of the hose is relatively small, the above-mentioned means may not be necessarily used.

The present invention is intended to provide a caulking means using only a taper rod and a fitting fitting applied thereto.

[0006]

The taper rod used for the crimping means of the present invention will be described below with reference to FIG. The taper rod 70 is formed at its tip with a taper portion 71, a pressing portion 72 connected to the taper portion and having a desired diameter D and a desired length L, and a pushing portion 73 connected to the pressing portion 72. The desired diameter and the lengths D and L described above are substantially the same as the inner diameter and the length in the longitudinal direction of the fitting inner fitting of the fitting fitting described later.

The joint fitting used in the present invention will be described below with reference to FIG. The joint metal fitting 80 is formed of an inner metal fitting 81 and an outer metal fitting 91, and the inner metal fitting 81 is a hollow cylinder 82 having a predetermined length and inner diameters L1 and D1.
And a hollow conical cylinder 83 having a predetermined length L2 and having a plurality of ridges 84 connected to it.

The mounting bracket 91 is formed of an insertion tube 92 which is inserted into the hollow tube 82 and a hose tube 93 which is connected to the insertion tube 92 and is attached to the outside of the hose. A joint 94 is rotatably attached to the insertion tube 92 by the shoulder portion of the hose tube 93, the hollow tube 82, and the flange portion 85. The conical cylinder 83 and the hose cylinder 93 are positioned so as to face each other. Further, the relationship between the length diameters described above is formed as L≈L3≈L1 + L2 and D≈D1.

[0009]

When the fitting 80 is attached to the hose, the hollow conical cylinder 83 is plastically deformed only by inserting the taper rod 70 into the hollow of the inner fitting, and this deformation is used to perform the mounting operation. It's easy.

[0010]

Embodiments of the present invention will be described below with reference to FIGS. As shown in FIG. 3, the hose 6 is inserted between the conical tube 83 of the inner and outer fittings and the hose tube 93 at the tip of the hose 6, and the pressing portion 72 having a predetermined length L is applied to the joint fitting in this state. And a taper rod 7 with a predetermined diameter D
Insert 0 into the mounting inner cylinder.

As a result, as shown in FIG. 4, when the tip of the pressing portion 72 of the taper rod and the tip of the conical cylinder 83 coincide with each other, the conical cylinder 83 is plastically deformed into a cylindrical shape having a diameter D, and The ridges 84 formed on the outer surface press the wall surface of the hose 6 against the ridges and grooves, so that the hose 6 and the joint fitting 70 are fastened in cooperation with the insertion tube 92.

[Other Embodiments] Another embodiment of the present invention is shown in FIG. 5, and this embodiment shows a joint fitting 70 having a joint 94 with an internal thread. The present invention is not limited to the above-mentioned embodiment, and the shape of the convex strip formed on the conical cylinder can be arbitrarily designed such that it is a linear convex strip or a projecting strip. Further, as a condition for mounting the conical cylinder, it is possible to arbitrarily select cold working or hot working (yen). Further, this attachment means is not limited to a hose, a pipe, and a tube, but can be applied to a resin pipe containing a reinforcing material such as a wire.

[0013]

According to the present invention, the conical cylinder of the joint fitting is plastically deformed by the taper rod to attach the joint fitting to the hose. Since the collet member which is conventionally required for the inner caulking means is not required, the inner diameter is relatively small. It can be applied to small hoses.

Further, the present invention has an advantage that the fastening function can be freely enhanced by freely changing the shape of the conical cylinder. In addition, according to the present invention, since the joint fitting and the hose can be fastened only by assembling the taper rod, the assembling can be simplified.

[Brief description of drawings]

FIG. 1 is an explanatory view of a taper rod according to the present invention.

FIG. 2 is a sectional view of an essential part of a joint fitting according to the present invention.

FIG. 3 is an explanatory diagram of an embodiment of the present invention.

FIG. 4 is an explanatory view of the operation of the embodiment of the present invention.

FIG. 5 is a diagram of another embodiment of the present invention.

FIG. 6 is a sectional view of a main part of a conventional caulking jig.

FIG. 7 is a cross-sectional view of an essential part of an example of a conventional caulking jig.

[Explanation of symbols]

 6 Hose 70 Tapered Rod 71 Tapered Part 72 Pressing Part 73 Extruded Part 80 Joint Metal Fitting 81 Mounting Inner Metal Fitting 82 Hollow Tube 83 Conical Tube 84 Convex Strip 91 External Mounting Metal Fitting 92 Inserting Tube 93 Hose Tube 94 Joint

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F16L 33/28 33/20

Claims (2)

[Claims] 1. When a fitting is attached to a hose, the end of the hose is inserted into the hose cylinder of the fitting, and in this state, the tapered rod is positioned so as to face the hose cylinder. And a caulking method for the fitting fitting, wherein the conical cylinder is plastically deformed into a cylindrical shape by the pressing portion of the rod to attach the fitting fitting to the hose. 2. A fitting for fitting on a hose taper rod, wherein a hose cylinder and a conical cylinder are formed at a position facing the hose cylinder in the fitting for mounting on the hose via the taper rod.