JPH0239109Y2 - - 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. 6, 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. 7, the nipple 6' may be crushed during caulking. Therefore, this brazed part 20
In the case of a hose cap having such a structure, 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, and a cylindrical engagement portion 4 having an inner circumferential diameter larger than the inner circumferential diameter of the center hole 1; A hose cap configured with a cylindrical nipple 6 having an outer circumferential diameter approximately corresponding to the inner circumferential diameter of the hose. A bulge portion is formed of the pipe material, and a bulge portion is formed by bulging a portion spaced apart from one end of the tube material to the outer peripheral side by bulge processing, and the one end side of the tube material is formed from the sleeve portion side of the cap body to the cap body. is inserted into the center hole of the wall, and the opening at the one end of the tube is flared while the side surface near the one end of the bulge is in contact with the one surface of the wall. By doing so, a flare portion 8 whose inner diameter increases toward the one end side is pressed and deformed by the other surface 2b of the wall portion 2 and comes into contact with the other surface 2b, and the flare portion 8 and the bulge portion. a neck portion 9 formed between the two sides and having an outer circumferential surface corresponding to the inner circumferential surface 2c of the center hole 1 of the wall portion 2; A ring-shaped locking groove is formed in which at least a portion of the bulge portion can be locked, and the bulge portion is pressed against the locking groove, and the wall portion 2 is connected to the flare portion 8 and the bulge portion 10. It is characterized by having a configuration in which it is held between.

As shown in FIG. 1, a ring-shaped locking groove 11 is formed on one side of the center hole of the wall portion, and the bulge portion 10 is pressed into the locking groove 11 in the axial direction. The portion on the side of the locking groove is locked and fixed in the locking groove.

The materials of the mouthpiece body and nipple mentioned above are as follows:
Although commonly used materials can be used, it is preferable that the cap body be made of aluminum material and the nipple made of iron material. In this case, the strength of the nipple will inevitably be higher than the sleeve part of the mouthpiece body, and the weight of the hose mouthpiece can be reduced.
Moreover, corrosion resistance can be improved.

As shown in FIG. 1, a groove 12 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. 2, a tube material 15 that will become a nipple in a predetermined shape is held between chuck jigs 13 so that one end thereof protrudes, and a pressing jig 14 is applied to the end of the tube material 15. Next, this tube material 15 is pressed in the direction of the arrow with the pressing jig 14, and as shown in FIG. A section 10 is formed.

Next, as shown in FIG. 4, one end side of the tube member 16 having the bulge portion 10 is inserted into the center hole of the wall portion 2 of the mouthpiece body 5 from the sleeve side of the mouthpiece body 5. Next, the bulge portion 10 is held in a state where the portion of the bulge portion 10 on the locking groove 11 side is locked and pressed in the ring-shaped locking groove 11 formed on the one side of the wall portion 2. As shown in FIG. 5, one end of the tube 16 having the bulge 10 is punched with a punch, with the side surface of the bulge 10 near the one end in contact with the one surface 2a of the wall 2. By flaring the opening at the one end of the wall 2, a flared portion 8 is formed which is pressed against the other surface 2b of the wall portion 2 and whose inner diameter increases toward the one end that comes into contact with the other surface 2b. .

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 8 and the bulge portion 10.

[Effects 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 the nipple extends from the sleeve portion of the cap body. A bulge part is formed from a hard tube material, and a bulge part is formed from one end of the tube material at a predetermined interval and protrudes to the outer circumferential side by bulge processing, and the one end side of the tube material is formed on the side of the sleeve section of the mouthpiece body. the end of the one end side of the pipe member with the side surface of the bulge part near the one end side pressed into the locking groove on the one side of the wall part. By flaring the opening portion of the wall, a flared portion whose inner diameter increases toward the one end that is pressed against the other surface of the wall and comes into contact with the other surface, and a bulge between the flared portion and the bulge. formed between
and a neck portion having an outer circumferential surface corresponding to an inner circumferential surface of the center hole of the wall portion. Therefore, in this hose cap, the bulge portion is locked in the locking groove that approximately matches the outer shape of the bulge portion of the wall portion, and the bulge portion is pressed, so that the bulge portion and the wall portion are They fit in well and the sealing area increases, so the sealing performance between the nipple part and the wall part is improved.
In addition, since the flare part is formed at the end of the nipple, it is easy to insert a punch and easily perform flaring, and since the wall part is held between the flare part and the bulge part, the body of the cap and the nipple are can be easily and firmly fixed.

In addition, in this hose cap, the nipple is made of a harder tube material than the sleeve part of the cap body, and the cap body and nipple are integrated without brazing, so the nipple material decreases in hardness and strength due to high temperatures. Therefore, the nipples will not 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. A ring-shaped locking groove 11 is formed on one surface 2a side of the center hole 1 of the wall portion 2 and has a shape that roughly follows the outer shape of the bulge portion and is capable of locking the bulge portion.

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 12 is formed on the outer peripheral surface of the nipple 6.

Further, one end 7 of the nipple 6 is formed of a tube material that is harder than the bulge portion of the mouthpiece body, and a bulge protruding toward the outer periphery is formed by bulging a portion spaced apart from the one end of the tube material by a predetermined distance. a flared portion 8 whose inner diameter 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; and the flared portion 8 and the bulge portion. and a neck portion 9 having an outer circumferential surface opposite to the inner circumferential surface 2c of the center hole 1 of the wall portion 2. Note that the bulge portion 10 is located in the locking groove 11.
The bulge portion 10 is pressed and fixed in a state where the locking groove 11 side is locked. The mouthpiece body is made of aluminum, and the nipple is made of mechanical structural carbon steel.

The hose cap of this example was manufactured as follows.

First, as shown in FIG. 2, a tube material 15 that will become a nipple is fixed with a chuck jig 13 so that one end thereof protrudes. Then, using a predetermined pressing jig 14, the end of the tube material 15 is pressed in the direction of the arrow.
In this case, a space is provided between the chuck jig 13 and the pressing jig 14 so that a bulge portion is formed at a predetermined position. In this way, as shown in FIG.
was formed.

Next, as shown in FIG.
One end side of the tube member 16 having this bulge part 10 is inserted from the sleeve part 3 side of the mouth body 5 so that the bulge part 10 engages with the ring-shaped locking groove 11 formed on the a side. 5 into the center hole 1 of the wall 2. Next, as shown in FIG.
Flare the opening at the end of the one end of the bulge 10 with a punch 18 while the side surface of the bulge 10 near the one end is in contact with the one surface 2a of the wall 2;
Therefore, the one end side is pressed and deformed by the other surface 2b of the wall portion 2 of the mouthpiece main body 5, and the flare portion 8 has an inner diameter increasing toward the one end side that comes into contact with the other surface 2b.
was formed.

The hose cap of this embodiment is configured such that the wall portion 2 of the cap body 5 is held between the flare portion 8 and the bulge portion 10, so that the cap body 5 and the nipple 6 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 will not be crushed by caulking.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a hose cap according to this embodiment. Figures 2 to 5 are explanatory diagrams of the method of manufacturing a hose cap in this embodiment, and Figure 2 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. 3 is a vertical cross-sectional view showing a state in which a bulge portion is formed by pressing using a pressing jig, and FIG. 4 is a longitudinal sectional view showing a bulge portion formed as shown in FIG. FIG. 5 is a vertical cross-sectional view showing a state in which the tube material is inserted into the mouthpiece body, and FIG. 5 is a longitudinal cross-sectional view showing a state in which one end of the tube material having the bulge portion shown in FIG. 4 is pressed and deformed to form a flared portion. It is a diagram. Figure 6 shows the conventional
FIG. 2 is a longitudinal cross-sectional view of a hose cap formed by brazing a cap body and a nipple. FIG. 7 is a longitudinal cross-sectional view showing a collapsed state of the nipple after the hose cap shown in FIG. 6 has been 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
...Cap body, 6...Nipple, 7...One end of nipple, 8...Flare part, 9...Neck part, 1
0... Bulge portion, 11... Locking groove, 12... Groove formed on the outer peripheral surface side of the nipple, 13... Chack jig, 14... Pressing jig, 15... Tube material that becomes the nipple, 16 ...Pipe material having a bulge portion, 17
...Press jig, 18...Punch, 19...Brazing part, 20...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 ,
and a cylindrical nipple that is fixed to the wall portion coaxially with the sleeve portion and has an outer circumferential diameter approximately corresponding to the inner circumferential diameter of the hose, the nipple comprising: is formed from a tubular material harder than the sleeve portion of the cap body, and includes a bulge portion that protrudes toward the outer periphery by bulging a portion spaced apart from one end of the tubular material by a predetermined distance; is inserted into the center hole of the wall of the cap main body from the sleeve section side of the cap main body, and with the side surface of the bulge near the one end in contact with the one surface of the wall, insert the tube into the center hole of the wall of the cap main body. a flared portion whose inner diameter increases toward the one end side, the flare portion being pressed against and abutting the other surface of the wall portion by flaring the opening portion of the end portion of the one end side;
a neck portion formed between the flare portion and the bulge portion and having an outer peripheral surface corresponding to the inner peripheral surface of the center hole of the wall portion, the neck portion having an outer peripheral surface corresponding to the inner peripheral surface of the center hole of the wall portion of the mouthpiece body; A ring-shaped locking groove capable of locking at least a portion of the bulge portion is formed on one side, and the bulge portion is pressed against the locking groove, and the wall portion is connected to the flare portion and the bulge portion. A hose cap characterized in that it is configured to be held between two parts. (2) The hose cap according to claim 1, wherein the cap body is made of aluminum material and the nipple is made of iron material.