JPH0356791A - Socket and nipple securing method for connector of fluid pressure resistant hose - Google Patents

Abstract

PURPOSE:To obtain a socket part of rigid construction by providing a socket part having a hose insertion hole, a division for dividing the hose insertion hole and a recessed stepped through-hole on the internal surface thereof, and a nipple inserted in the socket. CONSTITUTION:A socket part comprises a socket 1 and a nipple 5, and the socket 1 has a division 3 at the center part of a hose insertion cylindrical part 2 having hose insertion holes 2a and 2b formed concentrically with the socket 1. A through-hole 4 is formed on the division 3 and steps 4a and 4b are formed on the internal surface of the through-hole 4. The nipple 5 is inserted in the through-hole 4, and a bulge inside 5b is pressed into the stepped part 4a of the through-hole 4 due to a pressing force, thereby fixing the nipple 5 in the through-hole 4. A pressure resisting hose 6 is inserted in the aforesaid cylindrical 2, caulked and fixed. As a result, a brazing work can be eliminated and less expensive manufacture is ensured. Also, the nipple 5 becomes free from a fracture at the neck.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an improvement in metal fittings used for connecting fluid pressure-resistant hoses such as brake hoses.

(Prior art and its problems) Conventionally, for example, in brake hoses for automobiles,
A socket is used to connect the brake hose, and a pair of pressure-resistant hoses can be inserted from both sides into the socket of this socket. It is depicted by inserting a nipple or soldering into a through-hole formed in the central partition wall, and in the past, in the process of manufacturing cap fittings, On the other hand, it is necessary to braze the nipple to integrate it, which increases the number of work steps and requires high-temperature treatment for brazing, which requires the nipple to be made of an expensive material. There is a problem in that the manufacturing cost becomes high due to brazing work, etc., and brazing also poses a problem in terms of strength.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and an object of the present invention is to provide a horizontal 11-metal fitting that is inexpensive to manufacture and is strengthened in strength. The gist of this is:
A metal fitting that connects fluid pressure-resistant hoses in a liquid-tight manner,
Each of the caps has a hose hole into which a fluid pressure resistant hose can be coaxially inserted from both ends, a partition wall that partitions the hose insertion hole, and a hole that partitions the hose insertion hole from the center of the axis of the wall. A socket having a through hole formed in a penetrating shape along the socket, and a nipple inserted into the through hole of the socket, and a concave stepped portion is formed on the inner periphery of the through hole. , the outer periphery of the I'ljj nipple is pressed into the stepped portion in a bulging shape.

(Function) A concave step is formed on the inner circumferential surface of the through hole that is formed in the partition wall of the socket of the fitting, so that when the nipple is inserted into the through hole, the nipple When compressed by pressing from both ends, the outer flesh of the nipple expands into the stepped portion and is press-fitted, and the nipple is firmly fixed in the through-hole via the stepped portion in a press-fitted manner, creating a strong structure. It can be made with metal fittings. In addition, since brazing is not required as in the conventional method, it is possible to form the 1] shell using inexpensive materials by working at room temperature.

(Example) Hereinafter, embodiments of the present invention will be explained based on the drawings.

In this example, we will explain the fitting of an automobile brake hose as an example.The fitting has a component structure as shown in the exploded view in Figure 1, and the fitting consists of a socket 1 and a nipple 5. The socket 1 as a whole is formed approximately in the shape of a slope, and a partition wall 3 is integrally formed in the center of a hose insertion section 2 in which hose insertion holes 2a and 2b are formed in the shape of an axis. A through hole 4 is formed in the axial center of the wall 3 in a penetrating manner along the longitudinal direction, and two step portions 4a. 4a is formed, and these stepped portions 4a, 4a are each formed in the shape of a groove on the inner peripheral surface of the through hole 4. This hose insertion cylinder part 2, partition wall 3, through hole 4, and step parts 4a, 4a
First, the outer shape is formed using a press machine, and then holes are formed using a lathe or the like.

A cylindrical nipple 5 can be inserted into the through hole 4, and an oil passage 5a through which oil can pass is formed inside the nipple 5. The nipple 5 is previously formed to have a length slightly longer than the length of the hose insertion tube 2, and as shown in FIG. 2, the nipple 5 is inserted into the through hole 4 and then In this state, when a pressing force is applied to both ends of the nipple 5 using a jig or the like as shown in FIG. The stepped portion 4a. where the flesh portion 5b is formed in the through hole 4. The nimble 5 is press-fitted into the through hole 4a, and the nimble 5 is firmly fixed in the through hole 4. In this state, the longitudinal dimension of the nipple 5 and the longitudinal dimension of the hose insertion cylinder portion 2 match, and the nipple 5 is arranged along the axes of the hose insertion holes 2a and 2b.

After shaping all the fittings firmly at room temperature in this way,
A pressure-resistant hose 6 constituting a brake hose extends from both ends of the hose insertion holes 2a and 2b of the socket 1,
6, the tips of the pressure hoses 6, 6 are brought into contact with the partition walls 3, 3, and the nipples 5, 5 are inserted into the insides of the pressure hoses 6, 6. By caulking the outer periphery of the hose insertion cylinder portion 2 in a wavy manner as shown in FIG. The t-pressure hoses 6, 6 are firmly and liquid-tightly connected to each other via the fitting 1 without being pulled out from the hose insertion tube 2.

In this example, the steps 4a, 4 formed in the through hole 4 are
Since the outer flesh of the nipple 5 is bulged out and press-fitted into the interior of the nipple 5, the nipple 5 is firmly integrated, and unlike conventional nipples 5, the nipple 5 is soldered to the partition wall. 3, the brazing work can be omitted, and since there is no high-wetting process associated with brazing, the nipple 5 can be formed from an inexpensive material, and there are fewer steps to manufacture the fitting. and can be manufactured at low cost.

For example, as shown in FIG. 5, in a structure in which the outer wall surface of the nipple 5 is bulged on the side of the partition wall 3, and a bulged flesh portion 5b is formed on the side of the partition wall 3, In this example, there is a problem that a gap S is created between the pressure hose 6 and the partition wall 3, and sufficient oil tightness cannot be obtained. Since it is press-fitted into the stepped portion 4a formed on the circumferential surface, it is possible to sufficiently ensure the oil-tightness of the pressure hose 6.

Incidentally, FIG. 6 shows a modification of the stepped portion 4a. That is, a stepped portion 4a is formed on the inner circumferential surface of the through hole 4 using a lathe or the like so as to open toward the side surface of the partition wall 3, and the nimble 5 is inserted into the through hole 4, and in this state, the step portion 4a is opened to the side surface of the through hole 4. Nipple 5 using 5
When a pressing force is applied to both ends of the nipple 5, the inside of the outer wall of the nipple 5 bulges outward due to the pressing force, and this bulging flesh part 5b forms the step part 4.
a, and the nipple 5 is inserted into the through hole 4 as shown in FIG.
It is firmly fixed inside. The stepped portion 4a having such a shape is easy to form, and the cap fitting can be manufactured at a lower cost. Note that the number and cross-sectional shape of the step portions 4a formed on the inner circumferential surface of the through hole 4 can be changed as appropriate.

Further, in this example, a fitting for a brake hose for an automobile is illustrated, but a structure similar to t1 can be applied to fittings for connecting other fluid pressure-resistant hoses.

(Effects of the Invention) The present invention provides a fitting for connecting fluid pressure-resistant hoses in a liquid-tight manner, and the fitting has a hose insertion hole into which a fluid pressure-resistant hose can be coaxially inserted from both disaster sides. , a socket having a partition wall that partitions the hose insertion hole, a through hole formed in a penetrating shape along the axis of the partition wall, and a nipple inserted into the through hole of the socket, A concave stepped portion is formed on the inner circumferential surface of the through hole, and the outer circumferential flesh of the nipple is press-fitted into the stepped portion in a bulging manner, thereby eliminating the need for conventional brazing work. This has the effect that the cap can be manufactured from inexpensive materials at room temperature without the need for this method, and that the cap can be made strong without bending the neck of the nipple.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is an exploded sectional view of the fitting, Fig. 2 is a sectional view of the nipple inserted into the through hole, and Fig. 3 is the nipple pressed into the step. Figure 4 is a cross-sectional view of the integrated structure, Figure 4 is the cross-sectional configuration N when pressure hoses are inserted and connected from both ends, Figure 5 is a cross-sectional configuration diagram illustrating a structure with weak strength, Figure 6 7 shows a modified example of the stepped portion, and is a cross-sectional view of the state in which the nipple is inserted into the through hole, and FIG. 7 is a cut-away view of the state in which the nipple is pressed into the stepped portion and integrated.

Claims (1)

[Claims] A fitting for connecting fluid pressure-resistant hoses in a liquid-tight manner, the fitting having a hose insertion hole into which a fluid pressure-resistant hose can be coaxially inserted from both ends, and a partition wall that partitions the hose insertion holes. , a socket having a through hole formed in a penetrating shape along the axis of the partition wall, and a nipple inserted into the through hole of the socket, the inner peripheral surface of the through hole having a concave shape. A method for fixing a socket and a nipple of a mouth fitting of a fluid pressure-resistant hose, characterized in that a stepped portion is formed, and the outer peripheral flesh of the nipple is press-fitted into the stepped portion in a bulging shape.