JPS6249089A - Manufacture of hose connecting joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is generally used as a supply pipe for various gases and liquids in vehicles,
8! ! The present invention relates to a method of manufacturing a hose connection joint that is used for piping in machines, equipment, etc., and is capable of connecting a flexible hose made of rubber or resin to one end.

(Prior Art) Conventionally, this type of hose connection joint has a structure in which two parts, such as a sleeve 1 and a nipple 2, which are made of a metal material and are separately molded, are combined and connected, as shown in FIGS. 5 to 7. ν is used.

That is, the nipple 2 is inserted into the assembly hole 4 formed in the bottom 3 of the sleeve 1, the bottom 3 of the sleeve 1 is opposed to the fitting groove 5 provided on the outer periphery of the nipple 2, and the outer periphery of the bottom 3 is crimped. A caulking type one that deforms under pressure and press-fits the bottom part 3 of the sleeve 1 into the fitting groove 5 (see Fig. 5);
There is a screw-in type in which the sleeve 1 and the nipple 2 are fixed by screwing (see Fig. 6), and a wax haisei in which the nipple 2 is press-fitted into the assembly hole 4 drilled in the bottom 3 of the sleeve 1 and then fixed by brazing. Examples include the expression RANO (see Figure 7).

In these hose connection joints, a flexible hose (not shown) is inserted into the gap between the sleeve 1 and the nipple 2, and then the sleeve 1 is crimped from the outside in the radial direction, so that the gap between the sleeve 1 and the nipple 2 is tightened. The hose is sandwiched between the two and connected together.

(Problems to be Solved by the Invention) In the case of the hose connection joint according to the prior art, the following problems occurred.

That is, the crimping type requires special crimping equipment and a complicated crimping jig, and furthermore, eccentric defects due to the nipple are likely to occur. In addition, the screw-in type requires a lot of time to cut the thread, which not only increases costs, but also provides incomplete airtightness. Furthermore, brazing requires a brazing work process, brazing filler metal, and fuel, which increases the cost accordingly.

This invention has been made in view of the above points, and an object thereof is to provide a method for manufacturing a hose connection joint that does not require special equipment and can be manufactured extremely easily and at low cost when combining a sleeve and a nipple. It is.

(Means for solving problems) Therefore, the present invention has the following configuration.

That is, after the nipple is inserted into the assembly hole at the bottom of the sleeve and the bottom of the sleeve is opposed to the fitting groove provided on the outer periphery of the nipple, a pressing member that comes into contact with the inner and outer surfaces of the bottom of the sleeve is disposed, and then, By sliding the pressing member in the axial direction, the bottom of the sleeve is pressed and deformed to bulge inward, and the inner edge of the bottom is press-fitted into the fitting groove to be integrally coupled.

(Example) Hereinafter, this invention will be described in detail based on an illustrative example.

FIG. 1 is a partial cross-sectional side view of a hose connection joint manufactured according to the present invention, and FIGS. 2 to 4 are cross-sectional views showing the manufacturing process of one embodiment of the present invention.

The hose connection joint manufactured according to the present invention has a sleeve 10 and a nipple 11 that are separately molded, similar to the conventional structure.
The bottom part 12 of the sleeve 10 is pressed and deformed to form a deformed part 16, and the sleeve 10 is bulged inward by the deformed part 16.

Due to this bulge, the inner edge portion 13 is press-fitted into a fitting groove 14 provided on the outer periphery of the nipple 11 and is integrally connected.

Note that inserting the flexible hose into the gap 15 between the sleeve 10 and the nipple 11 and connecting them is the same as in a conventional hose connection joint.

Next, a method for manufacturing the hose connection joint will be explained based on FIGS. 2 to 4.

First, as shown in FIG. 2, the nipple 11 was inserted into the assembly hole 17 drilled in the bottom 12 of each separately molded sleeve 10, and the inner edge 13 of the bottom 12 was provided on the outer periphery of the nipple 11. It is held in a state where it faces the fitting groove 14. It is desirable that the fitting groove 14 be formed to have a thickness equal to or slightly larger than the wall thickness of the bottom portion 12 of the sleeve 10.

Next, as shown in FIG. 3, an annular die 20 is inserted into the gap 15 between the sleeve 10 and the nipple 11, and the bottom j2 of the sleeve 10 is held between the annular die 20 and the annular die 20. , punch 2 on the outer circumference of nipple 11
6 is placed.

The annular gooseneck 20 is formed into a cylindrical body 22 that is inserted into the gap 15 between the sleeve 10 and the nipple 11.
A projection 21 is protruded in an annular shape on the end surface of the cylinder 22 that contacts the bottom 12 of the tube 2, and an annular die is provided between the bottom surface 23 of the cylinder 22 into which the nipple 11 is inserted and the end surface of the nipple 11. A predetermined interval is provided so that 20 can slide in the axial direction. On the other hand, an annular projection 27 is provided on the end surface of the punch 26 in contact with the bottom portion 12 .

In this step, after the sleeve IO and nipple 11 are positioned and held, they are inserted until the protrusion 21 of the annular forceps 20 and the protrusion 27 of the punch 26 abut on the bottom 12, respectively.

Thereafter, as shown in FIG. 4, the annular forceps 20 and the punch 26 are pressed together in the axial direction.

When the bottom portion 12 is deformed by this pressure, a concave shape 24.28 is formed in the bottom portion 12 by the insertion of the protrusion 21.27. Since the bottom portion 12 is reduced in thickness and bulged inward by the concave portions 24 and 28, the inner edge portion 13 is reduced in diameter and press-fitted into the fitting groove 14.

In this way, the sleeve 10 and nipple 11 are coupled together as one piece.

In addition, the protrusion 21 of the annular goose 20 and the protrusion 2 of the punch 26
The shape, number, etc. of 7 may be appropriately determined depending on the size of the sleeve and the thickness of the bottom portion 12. Further, the protrusion may be provided only on one side of the annular die 20 or the punch 26. In this case, the annular goose 20 or the punch 26 provided with a protrusion may be slid in the axial direction, and the other may be held and fixed.

(Effects of the Invention) As explained above, according to the manufacturing method of the present invention, the following specific effects can be achieved.

(1) The combination of the sleeve and nipple does not require any special equipment, and can be produced at low cost using a very simple press.

(2) Since the inner edge of the bottom of the sleeve is press-fitted into the nipple fitting groove, a strong hose connection joint structure can be obtained, and there is no fear that the nipple will come off in the axial direction.

(3) Since the sleeve and nipple are combined and connected by inserting the nipple into an annular die, eccentricity of the nipple does not occur.

(4) Press-fitting the bottom of the sleeve into the fitting groove is a simple method of pressing and deforming the bottom of the sleeve, so it is suitable for mass production, and together with the reduction in equipment costs, it is possible to reduce the cost of the product.

[Brief explanation of drawings]

Fig. 1 is a partially sectional side view of a hose connection joint manufactured according to the present invention, and Fig. 2~! Figure 4 is a cross-sectional view showing the manufacturing process according to an embodiment of the present invention, and Figures 5 and 7 are partially sectional side views showing the structure of a conventional hose connection joint. 10 is a sleeve, 11 is a nipple, 12 is a sleeve bottom, 13 is an inner edge, 14 is a fitting groove, 15 is a gap, 20 is an annular die, 21 is a protrusion, 22 is a cylindrical body 23 is a bottom surface, 24 is a concave shape, 26 is punch, 27
28 is a protrusion, and 28 is a concave shape.

Claims (3)

[Claims] (1) After inserting the nipple into the assembly hole at the bottom of the sleeve and making the bottom of the sleeve face the fitting groove provided on the outer periphery of the nipple, a pressing member that comes into contact with the inner and outer surfaces of the bottom of the sleeve is arranged, and then , by sliding the pressing member in the axial direction, the bottom of the sleeve is pressed and deformed to bulge inward, and the inner edge of the bottom is press-fitted into the fitting groove to be integrally coupled. A method of manufacturing a hose connection joint. (2) The hose connection joint according to claim 1, characterized in that the inner edge of the bottom is press-fitted into the fitting groove by simultaneously pressing and deforming the sleeve bottom from the inner and outer surfaces in the axial direction. manufacturing method. (3) A patent claim characterized in that the inner edge of the bottom is press-fitted into the fitting groove by fixing either one of the inner or outer surfaces of the sleeve bottom and deforming it by pressing in the axial direction only from the other side. A method for manufacturing a hose connection joint according to item 1.