JPH0139993Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an improvement of a hose cap.

[Prior Art] As a conventional hose cap, one in which a cap body and a nipple are integrally formed is known. This hose cap has the disadvantage that the gap between the sleeve portion of the cap body and the nipple is narrow, and when a groove is to be formed on the outer periphery of the nipple or the inner surface of the sleeve portion, a machining tool cannot be inserted into the groove.

In view of the above drawbacks, as a conventional hose cap,
As shown in Fig. 7, the nipple 6' and the cap body 5' are machined separately, the nipple is grooved by rolling or cutting, and this is brazed to the cap body 5'. It is being However, in this hose cap, the hardness of the nipple 6' decreases due to the high temperature during brazing, and as a result,
As shown in FIG. 8, the nipple 6' may be crushed during caulking. Therefore, this brazed part 2
In a hose cap having a diameter of 0, the fastening performance deteriorates and the necessary flow path cannot be secured.

[Problems to be solved by the invention] The present invention overcomes the above-mentioned drawbacks, and aims to provide a hose cap that does not cause a decrease in the hardness or strength of the nipple due to high temperatures, and therefore prevents the nipple from collapsing due to caulking. purpose.

[Means for Solving the Problems] The hose cap of the present invention will be described with reference to a specific example shown in FIG. 2a, a cylindrical sleeve portion 3 having an inner circumferential diameter larger than the inner circumferential diameter of the center hole 1 and approximately corresponding to the outer circumferential diameter of the hose to be inserted; and the other surface of the wall portion 2. 2b, a cylindrical engagement portion 4 having an inner diameter larger than the inner diameter of the center hole 1; 2 and a cylindrical nipple 6 having an outer circumferential diameter approximately corresponding to the inner circumferential diameter of the hose, and one end 7 of the nipple 6 is connected to at least the inner circumferential surface 2d of the engaging portion 4. an enlarged pipe portion 8 that is partially pressed and deformed and comes into contact with at least a portion of the inner circumferential surface 2d;
a flared portion 9 that is continuous with the expanded tube portion 8 and has an inner diameter that increases toward the one end 7 side that is pressed and deformed by the other surface 2b of the wall portion 2 and comes into contact with the other surface 2b; continuous with the central hole 1 of the wall portion 2
A neck portion 1 having an outer circumferential surface corresponding to an inner circumferential surface 2c of
0, and the one surface 2 of the wall portion 2 is continuous with the neck portion 10.
A bulge part 11 is pressed and deformed to abut against the one surface 2a, and the wall part 2 is sandwiched between the flare part 9 and the bulge part 11.

The expanded tube portion is pressed and deformed by at least a portion of the inner circumferential surface of the engaging portion and comes into contact with at least a portion of the inner circumferential surface. The expanding portion may have a relatively small portion that contacts the inner circumferential surface 2d as shown in FIG. 1, or may have a relatively large portion that contacts almost the entire inner circumferential surface as shown in FIG. The inner circumferential surface may be in contact with the entire surface of the inner peripheral surface. Note that this abutting portion is preferably relatively large. In this case, the joint area between one end of the nipple and the body of the mouthpiece becomes larger, which makes it possible to fix the two more firmly, and also makes it possible to reduce the internal volume of this hose mouthpiece, thereby reducing the incompressibility of the fluid. This is because it is possible to improve the transmittance of pressing force and the like.

The bulge portion is pressed in the axial direction and fixed to one surface of the wall portion. The bulge portions 11 may have a shape in which the inner circumferential surfaces do not contact each other, but preferably have inner circumferential surfaces in contact with each other as shown in FIG. This is because in this case, the wall portion 2 can be held.

As shown in FIG. 1, a ring-shaped locking groove 12 is formed on one side of the center hole of the wall, and the bulge portion 11 is pressed and fixed into the locking groove 12. be able to. Note that the bulge portion may be pressed and fixed to one surface of a wall portion that does not have a locking groove as described above.

The materials of the mouthpiece body and nipple mentioned above are as follows:
Although commonly used materials can be used, the base body can be made of aluminum material, and the nipple can be made of iron material. In this case, the weight of the hose cap can be reduced, and corrosion resistance can be improved.

As shown in FIG. 1, a groove 13 may be formed on the outer peripheral surface of the nipple.

The hose cap of the present invention is manufactured, for example, as follows.

As shown in FIG. 3, a tube 16 that will become a nipple in a predetermined shape is held between a chuck jig 14 so that one end 7 of the tube protrudes, and the pressing jig 14 is applied to the end of the tube 16. Next, this tube material 16 is pressed in the direction of the arrow with the pressing jig 15 to form the bulge portion 11 at a predetermined position as shown in FIG.

Next, as shown in FIG. 5, the tube member 17 having the bulge portion 11 is inserted into the center hole of the wall portion 2 of the base body 5. Next, as shown in FIG.
1, the tube 17 is punched with a punch 19.
One end of 7 is pressed and deformed by the other surface 2b of the wall portion 2 to form a flared portion 9 whose inner diameter increases toward the one end 7 side that comes into contact with the other surface 2b, and the engaging portion An enlarged tube portion 8 is formed which abuts a part of the inner circumferential surface 2d of the tube.

The hose cap manufactured as described above has a structure in which the wall portion 2 of the cap body 5 is held between the flare portion 9 and the bulge portion 11.

[Effect of the invention] The hose cap of the present invention is composed of a cap body having a predetermined wall portion, a sleeve portion, and an engaging portion, and a predetermined nipple, and one end of the nipple is connected to the engaging portion. an expanded tube portion that is press-deformed on at least a portion of the inner circumferential surface of the wall portion and comes into contact with at least a portion of the inner circumferential surface of the wall portion; a flared portion whose inner diameter increases toward one end that comes into contact with the wall; a neck portion that is continuous with the flared portion and has an outer circumferential surface facing the inner circumferential surface of the central hole of the wall portion; The bulge part is continuous, and is pressed and deformed by the one surface of the wall part and comes into contact with the one surface. Therefore, in this hose cap, the wall portion is sandwiched between the flare portion and the bulge portion, and since the joint area between one end of the nipple and the cap body is large, it is possible to firmly connect the cap body and the nipple. It can be fixed to

Furthermore, since the present hose cap is made by integrating the cap body and the nipple without using brazing, there is no reduction in the hardness or strength of the nipple material due to high temperatures, and therefore the nipple is less likely to be crushed by caulking.

[Example] The present invention will be explained below with reference to Examples.

As shown in FIG. 1, the hose cap of this embodiment is composed of a predetermined cap body 5 and a predetermined nipple 6.

The base body has an annular wall portion 2 having a central hole 1.
and a cylindrical sleeve portion 3 that is integrally formed on one surface 2a of the wall portion 2 and has an inner circumferential diameter larger than the inner circumferential diameter of the center hole 1 and approximately corresponds to the outer circumferential diameter of the hose to be inserted; A cylindrical engaging portion 4 is integrally formed on the other surface 2b of the wall portion 2 and has an inner circumferential diameter larger than the inner circumferential diameter of the center hole 1. Note that a ring-shaped locking groove 12 is formed on one surface 2a side of the center hole 1 of the wall portion 2.

The nipple 6 is fixed to the wall portion 2 coaxially with the sleeve portion 3 and has a cylindrical shape with an outer circumferential diameter approximately corresponding to the inner circumferential diameter of the hose. Note that a groove 13 is formed on the outer peripheral surface of the nipple 6.

Further, one end portion 7 of the nipple 6 is pressed and deformed by a part of the inner circumferential surface 2d of the engaging portion 4, so that the one end portion 7 of the nipple 6
The inner diameter increases as it goes toward the one end 7 that is continuous with the expanded tube portion 8 and is pressed and deformed by the other surface 2b of the wall portion 2 and comes into contact with the other surface 2b. a flared portion 9 in which the angle increases; a necked portion 10 that is continuous with the flared portion 9 and has an outer circumferential surface facing the inner circumferential surface 2c of the central hole 1 of the wall portion 2; It consists of a bulge portion 11 that is pressed and deformed by the one surface 2a of the wall portion 2 and comes into contact with the one surface 2a. Note that the bulge portion 11 is pressed and fixed in the locking groove 12.

The mouthpiece body and nipple are made of mechanical structural carbon steel (hardness 120-140Hv).

The hose cap of this example was manufactured as follows.

First, as shown in FIG. 3, a tube 16 that will become a nipple is fixed with a chuck 14 so that one end 7 of the tube protrudes. Then, using a predetermined pressing jig 15, the end of the tube material 16 is pressed in the direction of the arrow.
In this case, a space is provided between the chuck portion 14 and the pressing jig 15 so that a bulge portion is formed at a predetermined position. In this way, a tube material 17 having a bulge portion 11 at a predetermined position was formed as shown in FIG.

Next, as shown in FIG.
The tube member 17 having the bulge portion 11 is inserted into the center hole 1 of the wall portion 2 of the base body 5 so that the bulge portion 11 engages with the ring-shaped locking groove 12 formed on the a side.
Insert into. Next, as shown in FIG. 6, one end of the tube 17 is pressed by the punch 18, so that the one end is pressed against the other surface 2 of the wall 2 of the mouthpiece body 5.
a flared portion 9 which is deformed by pressure and has an inner diameter increasing toward the one end 7 side that abuts the other surface 2b;
is formed, and the inner circumferential surface 2d of the engaging portion 4
An enlarged tube portion 8 was formed which abuts a part of the tube.

In the hose cap of this embodiment, the wall portion 2 of the cap body 5 is sandwiched between the flare portion 9 and the bulge portion 11, and the joint area between the one end 7 of the nipple 6 and the cap body 5 is large. Therefore, the cap body 5 and the nipple are firmly fixed.

Furthermore, when manufacturing the hose cap of this embodiment, the cap body 5 and the nipple 6 are connected without using brazing.
Since these can be integrated, there is no reduction in the hardness or strength of the nipple material due to high temperatures, and therefore the nipple is less likely to be crushed by caulking.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a hose cap according to this embodiment. FIG. 2 is a longitudinal cross-sectional view of a hose cap according to the present invention, which has a cap body having an enlarged pipe portion that comes into contact with almost the entire inner circumferential surface of an engaging portion. Figures 3 to 6 are explanatory diagrams of the method of manufacturing a hose cap in this embodiment, and Figure 3 shows the state immediately before the pipe material that will become the nipple is fixed with a chuck jig and pressed using a press jig. FIG.
The figure is a longitudinal cross-sectional view showing a state in which a bulge part is formed by pressing using a pressing jig, and FIG. 5 shows a state in which a pipe material having a bulge part formed as shown in FIG. 4 is inserted into the mouthpiece body. FIG. 6 is a vertical cross-sectional view showing a state in which one end of the tube material having the bulge shown in FIG. 5 is pressed and deformed to form a flared portion and an enlarged tube portion. FIG. 7 is a longitudinal sectional view of a conventional hose cap made by brazing a cap body and a nipple. FIG. 8 is a longitudinal cross-sectional view showing a collapsed state of the nipple after the hose cap shown in FIG. 7 is caulked. DESCRIPTION OF SYMBOLS 1... Center hole, 2... Wall part, 2a... One surface of wall part, 2b... Other surface of wall part, 2c... Inner peripheral surface of center hole of wall part, 3... Sleeve part, 4... ...Engagement part, 5
...Body of the cap, 6...Nipple, 7...One end of the nipple, 8...Pipe expansion part, 9...Flare part, 10
. . . Neck portion, 11 . . . Bulge portion, 12 .
16... Pipe material to be a nipple, 17... Pipe material having a bulge portion, 18... Holding jig, 19... Punch, 20... Brazing portion, 21... Hose.

Claims (1)

[Claims for Utility Model Registration] (1) An annular wall portion having a center hole, and an outer circumference diameter of a hose to be inserted that is integrally formed on one surface of the wall portion and is larger than the inner circumference diameter of the center hole. a cylindrical sleeve portion having an inner circumferential diameter approximately corresponding to that of the central hole; and a cylindrical engaging portion integrally formed on the other surface of the wall portion and having an inner circumferential diameter larger than the inner circumferential diameter of the center hole ,
a cylindrical nipple fixed to the wall coaxially with the sleeve and having an outer circumferential diameter approximately corresponding to the inner circumferential diameter of the hose, one end of the nipple having: an expanded tube portion that is pressed and deformed by at least a portion of the inner circumferential surface of the engaging portion and comes into contact with at least a portion of the inner circumferential surface; a flared portion whose inner diameter increases toward the one end side, which contacts the other surface; and a neck portion that is continuous with the flared portion and has an outer circumferential surface corresponding to the inner circumferential surface of the central hole of the wall portion. and a bulge part that is continuous with the neck part and is pressed and deformed by the one surface of the wall part and comes into contact with the one surface, and the wall part is held between the flare part and the bulge part. A hose cap featuring: (2) The hose cap according to claim 1, wherein the bulge portion is pressed in the axial direction and is fixed to one surface of the wall portion with the inner peripheral surfaces in contact with each other. (3) The hose according to claim 1 of the utility model registration claim, wherein a ring-shaped locking groove is formed on one side of the center hole of the wall, and the bulge portion is pressed and fixed to the locking groove. Usage cap. (4) The hose cap according to claim 1, wherein a groove is formed on the outer peripheral surface of the nipple. (5) The hose cap according to claim 1, wherein the cap body is made of aluminum material and the nipple is made of iron material.