JPS61167796A - Fitting structure of mouthpiece for hose - 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] Purpose of the Invention (Field of Industrial Application) This invention relates to a fitting structure for a cap that is attached to the tip of a hose in order to join one hose to another member such as a pipe. It is something.

(Prior Art) Conventionally, as shown in FIG. 13, a record-proof cap is a member whose one end is fitted into the inner peripheral side of the end 101a of the hose 101 and whose other end is attached to the tip of the hose 101. Female member 109 for attaching a pipe (not shown), etc.
The nipple 103 fitted into the
A sleeve 104 for pressing the end 101a of the hose 101 against the outer peripheral surface of the base 10.
2 are known.

Further, the end surface of the hose 101 on which the tube rubber 111, the reinforcing thread 113, and the cover rubber 112 are laminated comes into contact with the proximal end of the sleeve 104 of the cap 102, and the sleeve 104 is attached to the nipple 103. A lid portion 104a is formed, and by caulking the outer peripheral surface of the proximal end of the sleeve 104, the inner peripheral surface 106 of the lid portion 104a is fitted into a fitting groove 110 provided on the approximately central outer peripheral surface of the nipple 103. It has a structure that fits together.

Therefore, caulking portions K of the nipple 103 and the sleeve 104 are formed near the fitting groove 110.

(Problems to be Solved by the Invention) In the mouthpiece having the above structure, the fluid flowing inside the hose 101 oozes out between the outer circumferential surface of the nipple 103 and the tube rubber 111, which usually causes the fluid to leak between the lid portion 104a and the hose. 1
01, and between the outer peripheral surface of the cover rubber 112 and the inner peripheral surface of the sleeve 104, and in the conventional cap, it also branches to the caulked portion K and oozes out.

In particular, when the nipple 103 is twisted or pulled and moves in the length direction, the lid part 104 at the caulked part K
Since the gap between the inner circumferential surface 106 of a and the fitting groove 110 increases, the fluid sealing performance at the caulked portion decreases.

Therefore, a method of sealing the fluid by welding the caulked portion K may be considered, but the welding operation requires a great deal of labor.

Therefore, an object of the present invention is to improve the nipple 103 and the sleeve 10.
It is an object of the present invention to provide a fitting structure of a cap with improved fluid sealing performance at a caulking portion K with the cap.

Structure of the Invention (Means for Solving Problems) The present invention provides a caulking portion between a nipple fitted into an end of a hose and a sleeve for pressing the end of the hose against the outer peripheral surface of the nipple. The above-mentioned problem is solved by providing a hose cap fitting structure in which a means for sealing fluid is provided in the gap.

(Function) Since the means for sealing the fluid closes the gap in the caulked portion that cannot be eliminated by simply caulking the sleeve, the sealing performance of the caulked portion is improved.

(Example) Next, a first example embodying the present invention will be described based on FIGS. 1 to 3 and FIGS. 11 and 12.

As shown in FIG. 1, the cap 2 of this embodiment has one end fitted into the inner peripheral side of the end 1a of the hose 1, and the other end attached to a member attached to the tip of the hose 1, such as another pipe (not shown). It consists of a nipple 3 fitted into a female member 9 for attaching the hose (without a tube), and a sleeve 4 for pressing the end 1a of the hose 1 against the outer peripheral surface of the nipple 3.

A lid portion 4a formed toward the outer circumferential surface of the nipple 3 is provided at the end of the sleeve 4 on the female member 9 side. 3, so as to fit tightly into a fitting groove 10 provided on the outer circumferential surface of 3.

The above structure is the same as that of a conventional cap, but as shown in FIG.
A means 5 for sealing fluid is provided in the gap 15 between the fitting groove 10 and the fitting groove 10, so that fluid cannot pass through the gap 15 of the caulked portion C.

In this embodiment, a fluid sealing means 5 is inserted into a bottom groove 12 in a fitting groove 10 provided on the outer peripheral surface of the nipple 3, and the fluid sealing means is constituted by an O-ring 5a. There is.

The O-ring 5 is made of an elastic material such as nitrile rubber, and is attached to the nipple 3 in advance as shown in FIG.

The nipple 3 and sleeve 4 to which the O-ring 5 is attached are assembled to the end portion 1a of the hose 1 by the following operation. First, as shown in FIG. 11, the sleeve 4 is fitted to the outer circumference of the end 1a of the hose 1, and then one end of the nipple 3 is fitted to the inner circumference of the end 1a of the hose 1. Next, a force is applied to the outer circumferential surface of one end of the sleeve 4 toward the center of the nipple 3 as shown by arrow X to caulk the sleeve 4.

At this time, the O-ring 5a is pushed from the outer circumference and deformed as shown in FIG. The effect of preventing the fluid from passing through the gap 15 is exerted.

Further, even if the nipple 3 is twisted or slightly moved in the length direction, the O-ring 5a is held by the seal portion S.

Therefore, the effect that the fluid sealing performance of the caulked portion C is improved compared to that of the conventional cap is exhibited.

In addition, following the caulking operation, as shown in FIG.
By sandwiching the end 1a between the nipple 3 and the sleeve 4, the cap 2 can be more firmly attached to the end 1a of the hose 1.

Next, a second embodiment will be explained based on FIG. 4.

In this embodiment, an O-ring is used as the fluid sealing means 5 as in the first embodiment. It is inserted into the 1. This embodiment also exhibits the same functions and effects as the first embodiment shown in Figs. 1 to 3 and Figs. 11 and 12.

A third embodiment will be described based on FIG.

In this embodiment, the spiral seal member 5 is made of copper wire, which is more flexible than the nipple 3 and the sleeve 4.
b is provided in the fitting groove 10 of the nipple 3, so that the helical seal member 5b is crushed during the caulking operation.

This embodiment also exhibits the same functions and effects as the first embodiment, but since the contact area of the seal portion is larger, the action of preventing fluid from flowing through the caulked portion C is different from that of the first embodiment. more noticeable. Moreover, the spiral seal member 5b
can be easily fixed in the fitting groove 10, so there is an effect that there is no need to provide a groove 12 in the fitting groove 10 as shown in the first embodiment.

A fourth embodiment will be described based on FIG.

In this embodiment, a protrusion 5c is formed integrally with the nipple 3 as a means for sealing fluid. Specifically, the protrusion 5c is formed integrally with the bottom surface of the fitting groove 10 in the circumferential direction of the nipple 3. The cross-sectional shape of the protrusion 5c is almost chevron-shaped, and its top P
When the sleeve 4 is caulked, the sleeve a comes into contact with the inner circumferential surface 6 of the lid portion 4a and is crushed.

The degree of abutment is such that the top portion Pa touches the cover portion 4 of the sleeve 4 as a whole.
The inner circumferential surface 6 of a is once in line contact and then crushed to the extent that it makes surface contact.

Since the means for sealing the fluid in this way is constituted by the protrusion 5c integrated with the fitting groove 10 of the nipple 3, the inner peripheral surface 6 of the nipple 3 and the lid portion 4a of the sleeve 4 is similar to the conventional technique described above. As a result, the gap 15 can be closed even if the sleeve 4 is caulked with a small force during the caulking operation, and the distance of the gap 15 can be significantly reduced. is demonstrated.

A fifth embodiment will be described based on FIGS. 7(a) and 7(b).

In this embodiment, as shown in FIG. 7(a), a projection 5e is used as a means for sealing fluid on the bottom surface of the fitting groove 10 of the nipple 3.
In addition, a groove 7 is provided on the inner circumferential surface 6 of the lid part 4a in which the protrusion 5e fits, and the sealing effect is exerted on the caulked part C by the cooperation of the protrusion 5e and the groove 7. It was designed so that

The cross-sectional shape of the protrusion 5e is trapezoidal, and the taper angle α formed by the two side surfaces 13a and 13b is equal to the taper angle α formed by the two side surfaces 14a of the groove 7.
and 14t). For example, the taper angle α is 84±2 degrees,
β is 90±2 degrees. Therefore, when the sleeve 4 is caulked, the two tops Pb and pc of the protrusion 5e come into contact with the tapered surfaces 14a and 14blC of rR7, as shown in FIG. 7(b).

Therefore, the protrusion 5e and the groove 7 come into surface contact at two places, and the fluid sealing effect at the caulked portion C is more exerted than in the fourth embodiment.

As is clear from the above embodiments, the present invention provides a caulking portion C.
This significantly improves the sealing performance of
The present invention is not limited to the above-described embodiments, but may also be implemented in the following embodiments.

(1) As shown in FIG. 8, a strut 5c serving as a means for sealing fluid may be formed integrally with the protrusion 4a on the inner circumferential surface 6 of the lid portion 4a of the sleeve 4.

(2) As shown in FIG. 9, a plurality of protrusions 5c may be provided on the inner circumferential surface 6 of the lid portion 4a as means for sealing fluid. Conversely, it is also possible to provide a plurality of protrusions 5c in the groove 10 of the nipple 3.

(3) As shown in FIG. 10, there is a protrusion 8 in the fitting groove 10 of the nipple 3 that is lower than the protrusion 5c, and when the sleeve 4 is caulked, the protrusion 8 is formed on the inner peripheral surface 6 of the lid part 4a. top P of
d is in pressure contact with each other to prevent the nipple 3 and sleeve 4 from rotating relative to each other, thereby preventing the nipple 3 from twisting or moving in the length direction, and improving the sealing performance of the caulked portion C. It is also possible to increase it further. Of course, it is also possible to reverse this configuration and provide the protrusion 8 on the inner circumferential surface 6 of the lid portion 4a.

(4) The spiral seal member 5b may be made of metal such as aluminum or lead.

(5) The end of the nipple 3 that is not fitted into the hose 1 may directly constitute a part of a component such as a fluid ejection nozzle.

(6) The helical seal member 5b may be provided so that the bottom surface of the fitting groove 10 is completely hidden, or may be provided so that a part of the bottom surface of the fitting groove 10 is hidden.

Effects of the invention By simply attaching the cap to the end of the hose and caulking the end of the sleeve, the means for sealing fluid at the caulked portion between the nipple and the sleeve comes into surface contact with the nipple, the sleeve, or both, and the gap between the caulked portions is reduced. Therefore, the present invention exhibits an excellent effect in that the pressurized fluid leaking from between the inner surface of the hose and the outer peripheral surface of the nipple can be sufficiently sealed by the caulked portion. Moreover, even if the nipple is twisted, the fluid sealing property is maintained.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of the base of the present invention, and FIG.
Fig. 3 is an enlarged sectional view of the main part of Fig. 1 showing the crimping part before the crimping operation is performed, and Fig. 4 is an enlarged main part of the second embodiment. 5 is an enlarged sectional view of the main part of the third embodiment, FIG. 6 is an enlarged sectional view of the main part of the fourth embodiment, and FIG. 7(a) is an enlarged sectional view of the main part of the fifth embodiment. An enlarged sectional view, FIG. 7(b) is an enlarged sectional view of the main part of the fifth embodiment showing the caulking part after the caulking operation is performed, and FIG. 8 shows the caulking part before the caulking operation is performed. FIG. 9 is an enlarged sectional view of the main part of the embodiment shown in FIG. Figure 13 is a partially cutaway front view of the cap of the present invention showing the process of attaching the cap to the hose.
The figure is a partially cutaway front view of a conventional base.

Claims (1)

[Claims] 1. A nipple (3) fitted into the end (1a) of the hose (1), and a nipple (3) fitted on the outer peripheral surface of the nipple (3).
) A hose cap characterized in that a fluid sealing means (5) is provided in the gap (15) between the caulking part (C) and the sleeve (4) for pressing the end (1a) of the hose. Mating structure. 2. The fitting structure for a hose cap according to claim 1, wherein the fluid sealing means (5) is an O-ring (5a). 3. The fitting structure for a hose cap according to claim 1, wherein the fluid sealing means (5) is a spiral seal member (5b) wound around the nipple (3). 4. The fitting structure for a hose cap according to claim 1, wherein the fluid sealing means (5) is a protrusion (5c) provided integrally with the sleeve (4). 5. The fitting structure for a hose cap according to claim 1, wherein the fluid sealing means (5) is a protrusion (5c) provided integrally with the nipple (3). 6. The fluid sealing means (5) is a protrusion (5e) provided integrally with the nipple (3), which can be fitted into a groove (7) provided on the sleeve (4). 7. The projection (5e) and the groove (7) each have two tapered surfaces (
13a, 13b) and (14a, 14b, and the taper angle (α) of the protrusion (5e) formed by the two tapered surfaces (13a) and (13b) is
7. The fitting structure for a hose cap according to claim 6, wherein the taper angle (β) of the groove (7) formed by the grooves (7) is smaller than the taper angle (β) formed by the grooves (7) formed by the grooves (14a) and (14b).