JPH06174161A - Method of holding nipple in hose - Google Patents

Abstract

PURPOSE:To easily insert a nipple into a hose and further to surely hold the inserted nipple in the hose. CONSTITUTION:A nipple 3 is pressed from its both ends in the lengthwise direction in a center hole 10 of a hose 1, to spread both end parts of the nipple 3. In this way, both the end parts of the nipple 3 are protruded to the inside of the hose 1, so as to surely hold the nipple 3 in the hose 1.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method of retaining a nipple in a hose. The nipple held by this method can form an intermediate joint with the joint and the sleeve, and can be used for a hose with an intermediate joint.

[0002]

2. Description of the Related Art For example, an intermediate joint of a hose with an intermediate joint has a joint portion, a cylindrical sleeve extending from at least one of the joint portions and into which the hose is inserted, and a central hole of the hose at a position corresponding to the sleeve. It consists of a cylindrical nipple inserted. The sleeve is swaged in the radial direction, and the hose is clamped and fastened between the sleeve and the nipple. The hose with an intermediate joint obtained in this way is used by fixing the joint portion to the vehicle body of an automobile with a bolt or the like.

In such an intermediate joint, in order to easily insert the nipple into the center hole of the hose, the outer diameter of the nipple is generally set to be approximately the same as the inner diameter of the hose.
However, if the nipple is held with a gap between it and the hose, it will be difficult to obtain a sufficient fastening force even after the sleeve is radially crimped, and the nipple will not move when pressure is applied to the hose. There is a risk of moving from the position corresponding to the sleeve.

Therefore, conventionally, a groove is formed on the surface of the nipple to increase the contact area with the hose, thereby ensuring a good fastening force (Actual No. Sho 55-310).
25, Japanese Patent Publication No. 3-15066).

[0005]

However, even if the surface of the nipple is grooved, it may be difficult to hold the nipple in the hose due to the inner diameter of the hose considering the insertability. For example, even if the sleeve is swaged as an intermediate joint, a sufficient fastening force is not yet secured, and the nipple may move slightly in the hose.

The present invention has been made in view of the above, and provides a method capable of easily inserting a nipple into a hose and securely holding the inserted nipple in the hose. The purpose is to

[0007]

A method of holding a nipple in a hose according to the present invention is to insert a cylindrical nipple into a center hole of a hose and press the nipple in the center hole from both ends in a longitudinal direction. By doing so, at least a part of the nipple is expanded in diameter.

[0008]

In the method of the present invention, the tubular nipple is first inserted into the center hole of the hose. At this time, if the outer diameter of the nipple is set to be approximately the same as the inner diameter of the hose, the nipple can be easily inserted into the center hole of the hose. Then, the nipple is pressed in the longitudinal direction from both ends in the center hole of the hose to expand at least a part of the nipple. As a result, at least a part of the nipple projects inside the hose, and the nipple is securely held in the hose.

[0009]

Embodiments 1 to 3 embodying the present invention will be described below with reference to the drawings. Example 1 First, as shown in FIG. 1A, a hose 1 cut into a predetermined length is prepared. And FIG. 1 (B)
As shown in, the cylindrical metal nipple 3 is inserted into the center hole 10 of the hose 1 from the one end 1a of the hose 1 by the first rod 2. The outer diameter of the nipple 3 is set to be equal to or smaller than the inner diameter of the center hole 10 of the hose 1. Further, the second rod 4 is inserted from the other end 1b of the hose 1. The first and second rods 2 and 4 each have the same outer diameter as the outer diameter of the nipple 3, and their tips are gradually thinned to a diameter smaller than the inner diameter of the nipple 3 so that they can be inserted into the central hole of the nipple 3. Has been formed. Therefore, the first and second rods 2 and 4 are also connected to the hose 1.
It can be easily inserted into the central hole 10.

Thereafter, as shown in FIG. 1C, the first and second rods 2 and 4 are moved toward each other in the center hole 10 of the hose 1 to press the nipple 3 from both ends in the longitudinal direction. To do. As a result, the first and second rods 2 and 4 are gradually inserted into both openings of the nipple 3 from the respective tips, and the outer diameters of the first and second rods 2 and 4 are larger than the inner diameter of the nipple 3, so that the nipple 3 Both ends are expanded. Therefore, as shown in FIG. 2, both ends of the nipple 3 project inside the hose 1. Therefore, according to this method, the easily inserted nipple 3 can be reliably held in the hose 1.

Next, the first and second rods 2 and 4 are extracted from the center hole 10 of the hose 1 and, as shown in FIG. 1 (D), a joint 5 having a cylindrical sleeve 5a on one side is prepared. The hose 1 is inserted into the hose hole 5b of the sleeve 5a. In the figure, 5c is a bolt hole. At this time,
The sleeve 5a is positioned in the hose 1 at a position corresponding to the nipple 3. After that, using the two-mount caulking tool 6,
By swaging the sleeve 5a in the radial direction, the nipple 3
Hold the hose 1 between and. At this time, both ends of the nipple 3 are projected to the inside of the hose 1 and are securely held in the hose 1, so that the sleeve 5a is swaged to exert a sufficient fastening force.

Therefore, in the hose with an intermediate joint thus obtained, the nipple 3 is surely prevented from moving in the hose 1, and the fastening force of the hose 1 with the sleeve 5a can be increased. (Embodiment 2) As shown in FIG. 3A, a pair of cylindrical metal nipples 7 and 8 are prepared. The nipples 7 and 8 are
The outer diameter is set to be slightly smaller than the inner diameter of the hose 1, and the facing surfaces 7a and 8a are formed to be recessed inward.

These nipples 7 and 8 are inserted into the center hole 10 of the hose 1, and the first and second rods 2 and 4 similar to those of the first embodiment are used to move the nipples 7 and 8 from both ends in the longitudinal direction. Press on. As a result, as shown in FIG. 3B, the facing surfaces 7a and 8a are aligned with each other.
The space existing between a and 8a is crushed, and at the same time, the facing parts of the nipples 7 and 8 are expanded. Therefore, the opposing portions of the integrated nipples 7 and 8 project inside the hose 1.

Therefore, also in this method, the first embodiment described above is used.
The same effect as can be obtained. (Embodiment 3) As shown in FIG. 4A, a pair of cylindrical metal nipples 11 and 12 are prepared. Nipple 11,
Each outer diameter 12 is set to be slightly smaller than the inner diameter of the hose 1. One of the nipples 11 is formed so that the outer diameter of the tip portion 11a gradually becomes smaller toward the other nipple 12, and the other nipple 12 is formed so that the inner diameter of the tip portion 12a gradually becomes larger toward the one nipple 11. .

These nipples 11 and 12 are inserted into the central hole 10 of the hose 1, and the first and second rods 2 and 4 similar to those of the first embodiment are used to insert the nipples 11 and 1 into the central hole 10.
2 is pressed from both ends in the longitudinal direction. As a result, the tip portion 12a of the nipple 12 swallows the tip portion 11a of the nipple 11, and the opposing portions of the nipples 11 and 12 are expanded in diameter. For this reason, the opposing portions of the integrated nipples 11 and 12 project inside the hose 1. In this case, it is preferable that the nipple 11 is made of a harder material than the nipple 12. Further, since the nipples 11 and 12 are engaged with each other by being plastically deformed at the opposing portions, the engagement between the two cannot be easily disengaged.

Therefore, even with this method, the same effects as those of the first and second embodiments can be exhibited.

[0017]

As described above in detail, in the method for holding a nipple in the hose of the present invention, a cylindrical nipple is inserted into the center hole of the hose, and the nipple is longitudinally moved from both ends in the center hole. By adopting a configuration in which the diameter of a part of the nipple is expanded by pressing the nipple, the nipple can be easily inserted into the hose and the inserted nipple can be reliably held in the hose. .

Therefore, if the nipple held in the hose by this method is adopted as, for example, a part of the intermediate joint, a sufficient fastening force can be secured by crimping the sleeve, and the nipple can move in the hose. Certainly prevented.

[Brief description of drawings]

1A to 1D are process diagrams showing the method of Example 1 from FIG.

FIG. 2 is a partial cross-sectional view showing a nipple held by the method of Example 1 together with a hose.

FIG. 3A is a sectional view showing a nipple used in the method of the second embodiment, and FIG. 3B is a sectional view showing a nipple held by the method of the second embodiment together with a hose.

4A is a cross-sectional view showing a nipple used in the method of the third embodiment, and FIG. 4B is a cross-sectional view showing the nipple held by the method of the third embodiment together with a hose.

[Explanation of symbols]

 1 ... Hose 10 ... Center hole 3, 7, 8, 11, 12 ... Nipple

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadayoshi Hori 1 Ochiai, Ochiai, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Within Toyoda Gosei Co., Ltd. Toyoda Gosei Co., Ltd.

Claims (1)

[Claims] 1. A tubular nipple is inserted into a center hole of a hose, and at least a part of the nipple is expanded by pressing the nipple from both ends in the center hole in the longitudinal direction. How to hold the nipple inside the hose.