JPH07285078A - Caulking jig and coupling fitting applicable to this jig - Google Patents

Abstract

PURPOSE:To make hose fitting so as to be attachable to a hose by means of a die-presser with a flat pressing aprt with no uneven strips and an uneven strip fitting. CONSTITUTION:A coupling fitting of a hose 6 is formed by a mounting inner fitting 7 and a mounting outer fitting 8. A hollow cylinder 71 and plural projecting strips 72 are formed in this mounting inner fitting 7, while an outer cylinder 82 and a recess strip 81 corresponding to a stem cylinder 83 and the projecting strips 72 are formed in the mounting outer fitting 8. In addition, a collet part 12 is installed in a foremost circumferential part of a die presser 1 of a caulking jig 10 so as to correspond to the recess strip 81. Supposing a taper rod 2 is extruded in an arrow direction, a foremost part 15 is opened wide by a taper rod 22, and the hollow cylinder 71 also opens its diameter wide and the projection strip 72 clamps the hose 6 pinchedly in cooperation with the recess strip 81. After mounting work is over, if the taper rod 22 is pulled out, the coupling fitting is attachable to the hose 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner caulking jig for a fitting fitting attached to a pipe, and more specifically, an inner crimping fitting fitting to be attached to a terminal portion of a hose, tube, pipe or the like used for piping, wiring, etc. The present invention relates to a jig and a fitting fitting applied to the caulking jig.

[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.

A caulking jig 10 shown in FIG. 12 is composed of a collet-shaped pressing tool 1 and a taper rod 2.
The taper portion other than the base portion 11 is formed as a plurality of collet portions 12, and a plurality of convex-concave ridges 13 are provided at the tip of the collet portion. The taper rod 2 is inserted into the embossing tool 1 to expand the collet portion 12 outward, and is composed of a rod base portion 21 and a taper rod 22.

The case where the above-described caulking jig is applied to a hose fitting will be described below with reference to FIG. Inner tube part 4 of inner tube fitting 4 with joint 5 at the open end of hose 6
2 is inserted and set in such a state that the convex-concave line 13 of the collet part 12 of the embossing tool abuts the inner cylinder 42 at the tip of the hose in this state.

In this state, if the taper rod 2 shown in FIG. 12 is moved in the direction of the arrow, the collet portion 12 is expanded in the radial direction by the taper rod 22, and the inner cylindrical portion 42 is opened as shown in the same figure.
An uneven strip 13 of collet is formed on the hose 6, and the hose fitting 20 is attached to the hose 6.

[0006]

SUMMARY OF THE INVENTION According to the present invention, the caulking jig of Japanese Patent Application No. 5-287532 described above has a hose fitting by imprinting the same shape on the inner tubular fitting by the uneven ridge formed on the collet portion of the caulking jig. It was attached to a hose. This invention does not require the above-mentioned uneven strip.

[0007]

The present invention relates to a taper rod and a collet-shaped embossing tool constituting a caulking jig, which has a simple flat pressing portion having no uneven ridge of the embossing tool disclosed above. And, the hose fitting is intended to be attached to the hose by means of the uneven strip fitting applicable to the embossing tool.

[0008]

According to the present invention, the uneven metal fitting is attached to the hose by the embossing tool, and the number, size or length of the fastening threads which are restricted by the uneven embossing of the embossing tool disclosed above can be freely selected. It is a thing.

[0009]

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. The fitting is made up of an inner fitting and an outer fitting.
Is normally formed as an outer diameter D2 that is equal to or smaller than the inner diameter D1 of the hose, and the metal fitting 7 is a hollow cylinder 7
1 and a plurality of ridges 72 formed on the outer surface of the cylinder are formed, and the inner diameter D3 of the hollow cylinder 71 is restricted to the extent that the mounting process to the hose is completed within the maximum allowable elongation of the cylinder. There is.

The hose mounting member 8 is formed of an outer cylinder 82 having an inner diameter substantially the same as the outer diameter D4 of the hose, and a stem cylinder 83 having a smaller diameter than the outer cylinder and having a hose end face fixing surface. Further, a concave streak 81 corresponding to the convex streak 72 of the hollow cylinder 71 described above is formed on the inner peripheral surface of the outer cylinder 82. 84
Indicates a threaded portion.

The manner in which the fittings (the inner fitting 7 and the fitting 8) are attached to the hose is shown in FIGS. 1, 2 and 3,
This will be described below with reference to FIG. As shown in FIG. 2, with the mounting inner metal fitting 7 fitted and inserted in the leading circumferential portion of the embossing tool 1 of the caulking jig 10, the ridge of the outer fitting has the mounting outer metal fitting 8 previously inserted through the tip of the hose 6. The collet portion 12 is positioned so as to correspond to the concave streak 81 formed by the outer cylinder 82.

With respect to the collet portion 12 in this state,
As shown in FIG. 3, when the taper rod 2 is pushed out in the direction of the arrow, the leading end 15 of the collet portion 12 is expanded by the taper rod 22, and the hollow cylinder 71 is forcibly expanded in its diameter. By this expansion, the ridges 72 of the hollow cylinder 71
Cooperates with the corresponding concave streak 81 of the outer cylinder 82 to fasten the hose 6 in a sandwiched manner.

As shown in FIG. 4, if the taper rod 22 is pulled out in the direction of the arrow after the mounting work is completed, the leading end 15 of the collet portion is restored to the initial state, but the hose 6 has a fitting fitting. 7, 8 are attached.

The inner fitting 7 can be mounted in a cold working state, but when tempered, it improves the degree of expansion and, further, work hardening by expanding work. Therefore, the attached state can be maintained while the mechanical rigidity of the material is restored.

[Other Embodiments] As shown in FIG. 5, the mounting inner fitting 7 formed of an independent ring 71 is mounted on the hose. The mounting mode will be described with reference to FIGS. 6, 7 and 8. For example: Several independent ring-shaped attachment fittings are inserted into the front circumferential portion 15 of the die pressing tool 1, and the collet portion 12 is positioned so that the ring surface corresponds to the concave streak 81 of the attachment outer fitting 8.

As shown in FIG. 7, with respect to the collet portion 12 in this state, when the taper rod 2 is pushed out in the direction of the arrow, the leading end 15 of the collet portion is expanded by the taper rod 22. External cylinder 82 corresponding to
The hose 6 is fastened in a clamped manner in cooperation with the concave strip 81. As shown in FIG. 8, if the taper rod 22 is pulled out in the direction of the arrow after completion of the work, the leading end 15 of the collet portion is restored to the initial state, but the fittings 7, 8 are attached to the hose.

[Other Embodiments] FIG. 9 shows the mounting state of the joint fitting in which the joint portion 9 is rotatably provided on the base cylinder 83 of the mounting outer fitting 8 constituting the joint fitting. Further, FIG. 10 shows the mounting inner fitting 7 having the ridge 72, and FIG. 11 shows the mounting inner fitting formed by the ridge 71.

The present invention is not limited to the above embodiment, and the shape, size, etc. of the ridge can be arbitrarily designed depending on the mounting conditions for the hose. Further, it is applicable not only to hoses but also to tubes, pipes, tubes and the like.

[0019]

According to the present invention, the fitting metal fitting is attached to the hose by the fitting inner fitting formed on the hollow inner cylinder in the form of a ridge and the fitting outer fitting cooperating therewith. Since the caulking jig that does not require the uneven strip provided on the collet portion of the embossing tool that has been configured can be adopted, the work efficiency can be remarkably improved.

Further, the set of caulking jigs of the present invention can be applied to various kinds of joint fittings. Further, the present invention can form a fitting having an inner diameter substantially equal to or larger than the inner diameter of the hose.

[Brief description of drawings]

FIG. 1 is an explanatory view of a mounting inner fitting of the present invention.

FIG. 2 is a mode view of an embodiment of the present invention, showing a mounting state of the mounting inner fitting.

FIG. 3 is an explanatory view showing an expanded state of a collet portion by a taper rod.

FIG. 4 is a diagram showing the completion of fastening the inner fitting to the hose by the collet portion.

FIG. 5 is an explanatory view of a ring-shaped inner fitting.

FIG. 6 is an aspect view of another embodiment of the present invention, showing a mounting state of a mounting bracket.

FIG. 7 is an explanatory diagram showing an expanded state of a collet portion by a taper rod.

FIG. 8 is a diagram showing the completion of fastening the hose of the mounting bracket by the collet portion.

FIG. 9 is an explanatory view of a joint fitting provided with a rotatable joint portion.

FIG. 10 is an explanatory view of other mounting inner fittings.

FIG. 11 is an explanatory view of other mounting inner fittings.

FIG. 12 is an explanatory view of a caulking jig disclosed in Japanese Patent Application No. 5-287532.

FIG. 13 is an operation explanatory view of the caulking jig shown in FIG. 12.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 type pressing tool 2 taper rod 6 hose 7 inner mounting metal fitting 8 outer mounting metal fitting 9 joint part 10 caulking jig 11 base part 12 collet part 15 head part 22 taper rod 71 hollow inner cylinder 72 convex streak 81 concave streak 82 outer cylinder 83 base cylinder 84 screw

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Claims (2)

[Claims] 1. A joint metal fitting, wherein a joint metal fitting is attached to a hose by a caulking jig, is formed by an inner metal fitting and an outer metal fitting, and the inner metal fitting is formed by a ridge having a desired shape provided on a hollow inner cylinder. The mounting outer metal fitting is formed by an outer cylinder provided with a recess having a desired shape corresponding to the convex ridge, and the inner mounting metal fitting is expanded by a caulking jig, and the hose is clamped in cooperation with the mounting outer metal fitting. A caulking jig characterized by fastening and a fitting fitting applied to this jig. 2. A caulking jig in which a joint fitting is attached to a hose by a caulking jig, wherein the caulking jig is formed of a collet-shaped embossing tool and a taper rod, and the collet-shaped embossing means includes a plurality of collet parts and A caulking jig characterized in that the front end of the collet portion is formed as a circumferential portion, and the fitting fitting is attached to a hose, and a fitting fitting applied to this jig.