JPH07180790A - Hose metal fitting having inner cylinder pressed by caulking jig - Google Patents

Abstract

PURPOSE:To obtain a hose metal fitting having such a structure as the inner cylinder of the hose metal fitting is pressed through a caulking jig to fasten it to a hose end in the case of attaching the hose metal fitting to the end of the hose or the like. CONSTITUTION:A hose metal fitting is formed of a connection fitting 5, an inner tube metal fitting 4 connecting to the connection fitting 5 and outer tube metal fittings 3 attached at the opposite positions of the inner tube of the inner tube metal fitting, and the inner tube is press-formed by a caulking jig to fasten the hose metal fitting to a hose. Thus since the hose metal fitting can be fastened by the caulking jig, the field execution of fastening is practicable, and moreover the fluidity resistance of fluid in the hose is not caused. In addition, the connection fitting has an advantage that its kind can be freely selected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose fitting to be attached to a terminal portion of a hose, tube, pipe or the like used for piping / wiring. The present invention relates to a hose fitting in which the inner cylinder of (1) is embossed by a caulking jig and fastened to the end of the hose.

[0002]

2. Description of the Related Art As a means for attaching a connecting fitting to an end of a hose, a pipe or a pipe provided with a stepped retaining groove is inserted into an inner diameter of the hose, and a wire is attached from the outside of the hose. Alternatively, there is a method of fastening with a metal band, or a method of fastening a processed metal fitting (metal, resin, etc.) to a hose with a screw. In addition, there was a factory processing method in which the outer and inner cylinders of metal fittings were set on the hoses and the outer cylinder was crimped with a high-pressure press.

[0003]

Among the above-mentioned conventional mounting means, the method of tightening with a wire or a metal band has a definite reliability and has a drawback that it is easily detached, and the method of crimping with an outer cylinder press machine of metal fittings is Although it is reliable and effective, it requires expensive equipment, can be processed only in the factory, and has a drawback that the length of hoses is limited to a fixed length. Further, in order to crimp the outer cylinder of the metal fitting at high pressure, the pressure resistance of the inner cylinder is required, the wall thickness needs to be increased, and the inner diameter of the inner cylinder must be made small. As a result, the flow resistance of the connection portion was increased, often resulting in a functional failure.

[0004]

According to the present invention, a collet-shaped caulking jig is inserted into an inner cylinder of a connecting fitting, and a force is applied to an inner taper rod to move the collet-shaped caulking jig to spread the collet-shaped caulking jig. Since it is swollen from the inside while inflating it and the inner diameter of the hoses is not reduced, there is an advantage that flow resistance is not generated. Further, the connection fitting connected to the head of the inner cylinder can be freely connected to another hose fitting having another connection fitting that can be connected to the connection fitting.

As a method of moving the taper rod,
Various types of hand press levers, toggles, cams, screws, air cylinders, hydraulic cylinders, etc. are conceivable, but since caulking does not require much force, it is easy to assemble at the work site using a simple portable type hand press. There is an advantage that the length of the hoses can be freely selected.

[0006]

[Operation] Connecting fittings for hoses are safe, inexpensive, easy and reliable. Further, the hose length can be freely adopted by combining the types of connection fittings of the hose fitting, for example, male screw, female nut and the like.

[0007]

EXAMPLE The caulking jig and the hose fitting applied to the present invention will be described below. Caulking jig 1
As shown in FIG. 1, 0 is composed of a collet-shaped die pressing tool 1 and a taper rod 2. The hose fitting 20 crimped by the crimping jig 10 is an outer cylinder fitting 3, an inner cylinder as shown in FIG. It is composed of a metal fitting 4 and a connection metal fitting 5.
The embossing tool 1 has a taper other than the base portion 11 formed as a plurality of collet portions 12, and a plurality of convex-concave ridges (or concave-convex connecting ridges) 13 are provided at the tip of the collet portion. .

The taper rod 2 expands the collet portion 12 inserted into the die pressing tool 1 to the outside, and comprises a rod base portion 21 and a taper rod 22. The outer tubular metal member 3 has a tubular portion 31 on which a plurality of convex-concave strips 32 (or convex-concave connecting strips) are formed. The inner tubular metal member 4 is formed of a head 41 rotatably connected to the connecting metal member 5 and a hollow tubular portion 42.

The caulking means of the hose fitting 20 will be described below with reference to FIGS. 3 and 4. As shown in FIG. 3, the opening end portion 61 of the hose 6 is preliminarily mounted in the tubular portion 31 of the outer tubular metal fitting 3, and the hollow tube of the inner tubular metal fitting 4 with the connecting metal fitting is provided in the hose opening portion in this state. The part 42 is inserted.

In this state, the caulking jig 10 is set so that the convex-concave strip portion 13 of the collet portion 12 of the embossing tool 1 faces the convex-concave strip portion 32 of the outer tubular metal fitting 3. In this state, if the rod base portion 21 of the taper rod 2 is pushed in the direction of the arrow as shown in FIG. 4, the collet portion 12 is expanded in the radial direction by the taper rod 22, and as shown in FIG. Part 4
An uneven strip 43 is formed on the hose 2, and the hose fitting 20 is fastened to the open end of the hose 6.

[Other Embodiments] FIG. 5 shows another embodiment of the hose fitting. In this embodiment, the fastening fitting 5 of the hose fitting is formed as a hollow bolt and is fastened to the hose. At this time, the inner cylinder 42 is formed by the caulking jig described above. FIG. 6 shows two hose fittings 20 and 2 equipped with nuts and hollow bolts as the fitting 5.
It shows a case where 0s are connected, and a sealing material 7 is interposed to secure the sealing property.

[0012]

As described above, the present invention is a method for connecting a connecting fitting to the end of a hose, which can be carried out on site, is safe, inexpensive, easy and reliable, and does not cause flow resistance. . Moreover, since the connection fitting of the hose fitting can be freely selected, the hose length of the connection hose can be freely adjusted.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a collet-shaped crimping jig and a taper rod.

FIG. 2 is a cross-sectional view in which a connecting fitting is incorporated in hoses.

FIG. 3 is an explanatory view of a usage state of the embodiment, and is a cross-sectional view in which hoses having connection fittings incorporated in a collet-shaped jig are fitted.

FIG. 4 is an explanatory view of a usage state of the embodiment, and is a cross-sectional view showing a state in which a taper rod is moved by applying force and a collet-shaped caulking jig is expanded and inflated from the inside and caulked.

FIG. 5 is a sectional view showing another embodiment.

FIG. 6 is a cross-sectional view of a connected state of two hose fittings according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Collet type pressing tool 2 Tapered rod 3 Outer cylinder metal fitting 4 Inner cylinder metal fitting 5 Connection metal fitting 11 Base 12 Collet part 13 Uneven ridge 21 Rod base 22 Taper rod 42 Hollow tubing 43 Uneven ridge

Claims (1)

[Claims] 1. A hose fitting is formed of an outer tubular fitting, an inner tubular fitting, and a connecting fitting. The outer tubular fitting is attached to the outside of the hose, and the connecting fitting is connected to the head of the inner tubular fitting. A hose fitting provided with an inner cylinder which is located at a position opposite to the outer fitting, and which is embossed by a caulking jig so that the inner fitting is embossed by a caulking jig to fasten the hose fitting to a hose.