JPH0229355Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a hose cap, and more specifically to a cap in which a separately formed cap body with a sleeve and a nipple are integrally fixed. be.

[Prior Art] Conventionally, a hose is inserted into a cylindrical space formed between the outer circumferential surface of a nipple and an inner circumferential surface of a sleeve, and the hose is fastened by caulking in the radial direction from the outer circumferential surface of the sleeve. As shown in FIG. 7, a device whose entire structure is integrally formed by cutting is known. By the way, it is known that it is preferable to provide a groove extending in the circumferential direction on the outer peripheral surface of the nipple or the inner peripheral surface of the sleeve for the purpose of improving the fastening force with the hose and improving the sealing performance. However, with the integrally formed cap as described above, there are cases where the cutting tool cannot be inserted between the nipple and the sleeve, and there are restrictions on groove machining. To remove this restriction, a cap body 100 and a nipple 20 as shown in FIG.
0 is formed as a separate body and integrated by a brazed portion 300 is known.

[Problems to be solved by the invention] In the case of the above-mentioned cap in which the cap body and the nipple are formed separately and integrated by brazing, the brazing process requires a large number of man-hours, which is disadvantageous in terms of cost. It was hot.

The present invention provides a new, low-cost hose cap in which the cap body and nipple can be easily and integrally connected.

[Means and effects for solving the problems] The hose cap of the present invention has an engaging part having a center hole and one end of which engages with another member, and a connecting part from the other end of the engaging part to the center. a cap body comprising a cylindrical sleeve extending coaxially with the hole, the sleeve having a groove-shaped first locking portion provided near the other end of the engaging portion on the inner circumferential surface of the sleeve; a nipple having a cylindrical shape and formed separately from the mouthpiece body and having a groove-shaped second locking portion on its outer circumferential surface, the first locking portion and the second locking portion being substantially opposed to each other; an end face of the other end of the engaging portion with the nipple inserted into the sleeve, and an end face of a punch inserted into a cylindrical space between the outer circumferential surface of the nipple and the inner circumferential surface of the sleeve; a metal bulging body in the shape of a perforated disk whose outer circumferential part bulges out under strong pressure between the two, and whose inner circumferential part bulges into the first locking part and is locked in the second locking part; The mouthpiece body and the nipple are fixed by the bulge.

The base body is composed of an engaging portion and a sleeve. Here, the engaging portion engages with another member provided in the flow path of the fluid flowing inside the hose, thereby achieving the function of securing the flow path. For example, it may have the same shape as conventional ones, such as one with a male thread that screws into another member, or a nipple-like one that fits into another member.

A groove-shaped first locking portion is formed on the inner peripheral surface of the sleeve extending from the other end of the engaging portion. This first locking portion is formed along the circumferential direction.
It may be a plurality of grooves provided at intervals in the circumferential direction, or it may be a continuous ring-shaped groove. Moreover, the position of the first locking part in the axial direction is
It is provided near the other end of the engaging portion. It is preferable to provide it continuously on the end surface of the other end (bottom surface of the sleeve).

On the outer peripheral surface of the nipple, there is a second
A locking portion is provided. Like the first locking portion, this second locking portion may also have a plurality of grooves spaced apart in the circumferential direction, or may be a continuous ring-shaped groove.

The most important feature of the present invention is that when the nipple is inserted into the sleeve so that the first locking part and the second locking part substantially face each other, the end surface of the other end of the engaging part and the outer periphery of the nipple A strong pressure is applied between the surface and the end face of the punch inserted into the cylindrical space between the inner peripheral surface of the sleeve, and the outer peripheral part bulges to become the first locking part, and the inner peripheral part bulges to become the second locking part. It has a metal bulge in the shape of a perforated disc that is respectively locked in a stop. That is, the base body and the nipple are integrally fixed by this bulge.

It is desirable that the bulging body densely fills the first locking portion and the second locking portion. If there is a gap, there is a risk of relative movement between the cap body and the nipple.

Note that it is preferable that the metal constituting the bulge be made of a material that is equal to or softer than the material of the cap body and the nipple. In this way, a bulge can be easily formed when pressed with a punch, and deformation of the cap and nipple can be prevented.

An example of a method for manufacturing the cap of the present invention will be described below.

First, the nipple is inserted into the mouthpiece body and held in a position where the first locking part and the second locking part are substantially opposed to each other. Next, a metal disk with a hole in the center is prepared. The outer diameter of this disk is less than or equal to the inner diameter of the sleeve, the inner diameter of the disk is greater than or equal to the outer diameter of the nipple, and the thickness is generally thicker than the width of the first locking portion and the second locking portion. . Then, a nipple is inserted into the hole of this disk, and the disk is inserted into the space formed by the nipple and the sleeve, and brought into contact with the end surface of the engaging portion. In this state, at least a portion of the outer circumferential end surface of the disk faces the opening of the first locking portion, and at least a portion of the inner circumferential end surface of the disk faces the opening of the second locking portion.

A punch is inserted into the cylindrical space between the outer circumferential surface of the nipple and the inner circumferential surface of the sleeve, and the disk is strongly pressed in the thickness direction between the end surface of the engaging portion and the end surface of the punch. As a result, the outer peripheral portion of the disk bulges out and is locked in the first locking portion, and the inner peripheral portion bulges out and is locked in the second locking portion. Therefore, the cap body and the nipple are integrally fixed by the bulging body formed by the bulging disc.

[Effects of the invention] According to the cap of the present invention, the cap body and the nipple are integrally fixed by the metal bulge.
Therefore, since there is no need to perform a brazing process, the number of man-hours can be reduced, and costs can be reduced. Furthermore, it can be fixed simply by pressing with a punch, making it much easier to fix the cap body and nipple than in the past.

[Example] This will be explained in detail below using examples.

FIG. 1 shows a hose cap according to an embodiment of the present invention. As shown in FIG. 2, this cap consists of an engaging part 11 having a center hole 10 and a male thread at one end for screwing into another member, and a center hole extending from the other end of the engaging part 11. 10 and a cylindrical sleeve 12 extending coaxially with the sleeve 10, the sleeve 12 has a ring-shaped groove-shaped first locking portion provided along the end surface of the other end of the engaging portion 11 on its inner circumferential surface. As shown in FIG. 3, the nipple 2 has a cylindrical shape, is formed separately from the mouthpiece body, and has a ring-shaped groove-shaped second locking part 21 on its outer peripheral surface. , With the nipple 2 inserted into the sleeve 12 so that the first locking part 13 and the second locking part 21 face each other, the end surface of the other end of the engaging part 11 and the nipple 2
Strong pressure is applied between the end face of the punch inserted into the cylindrical space between the outer circumferential surface of the sleeve 12 and the inner circumferential surface of the sleeve 12, and the outer circumferential portion bulges into the first locking portion 13, and the inner circumferential portion bulges out. and a metal bulge 3 in the shape of a perforated disc that is locked to the second locking part 21.

Also, the inner peripheral surface of the sleeve 12 and the nipple 2
A plurality of ring-shaped grooves 1 are formed on the outer peripheral surface of each of the
4 and 22 are formed. In addition, the cap body 1 is
The nipple 2 is formed by cutting S12C material and STKM material.

Next, a method for manufacturing the cap of this embodiment will be explained.

First, the nipple 2 is inserted into the cap body 1 shown in FIG. At this time, the end surface of the nipple 2 comes into contact with the stepped portion 15 of the mouthpiece body 1 and is positioned. In this state, the first locking portion 13 and the second locking portion 21 are in an opposing positional relationship.

Next, as shown in FIG. 4, a brass disc 31 having a center hole 32 having an inner diameter substantially the same as the outer diameter of the nipple 2 and an outer diameter substantially the same as the inner diameter of the sleeve 12, A state in which the nipple 2 is inserted into the center hole 32 and inserted into the cylindrical space formed by the inner circumferential surface of the sleeve 12 and the outer circumferential surface of the nipple 2, and is in contact with the end surface of the engaging portion 11 (bottom of the sleeve). shall be. This state is shown in FIG. That is, in this state, the first locking part 13, the second locking part 21, and the disc 31 are located at substantially the same position in the axial direction. Note that either the nipple 2 or the disc 31 may be inserted into the sleeve 12 first.

Next, as shown in FIG. 6, the engaging part 11 is held by the holding member 5, and the punch 4 is inserted into the cylindrical space formed by the inner circumferential surface of the sleeve 12 and the outer circumferential surface of the nipple 2. 4 and the end surface of the engaging portion 11 strongly press the disk 31. Then, the disk 31 bulges in the outer circumferential direction and the inner circumferential direction due to the compressive stress, and the outer circumferential portion bulges and fills the first locking portion 13.
A bulging body 3 whose inner peripheral part bulges and fills the second locking part
is formed. As a result, the cap body 1 and the nipple 2 are integrally fixed by the bulge 3.

With the hose cap of this embodiment, the cap body and nipple can be integrally fixed by simply pressing with a punch as described above, which is easy and can omit the brazing process. It is possible to reduce costs due to the reduction in man-hours.

[Brief explanation of the drawing]

Figures 1 to 6 relate to a hose cap according to an embodiment of the present invention, with Figure 1 being a sectional view thereof, Figure 2 being a sectional view of the mouthpiece body, and Figure 3 being a sectional view of the nipple. , FIG. 4 is a perspective view of the disc for forming the bulging body, FIG. 5 is a sectional view showing the state in which the nipple and the disc are inserted into the mouthpiece body, and FIG. 6 is a perspective view of the disc for forming the bulging body. It is an explanatory sectional view showing where it is. 7th
8 and 8 are sectional views of conventional hose caps, respectively. DESCRIPTION OF SYMBOLS 1... Cap body, 2... Nipple, 3... Swelling body, 4... Punch, 5... Holding member, 10... Center hole, 11... Engaging portion, 12... Sleeve, 13
...First locking part, 14, 22...Ring-shaped groove, 1
5...Step part, 21...Second locking part, 31...Disc, 32...Center hole.

Claims (1)

[Claims for Utility Model Registration] An engaging part having a center hole and one end of which engages with another member, and a cylindrical sleeve extending coaxially with the center hole from the other end of the engaging part. The sleeve includes a cap body having a groove-shaped first locking portion provided near the other end of the engagement portion on the inner circumferential surface of the sleeve, and a cylindrical-shaped cap body that is separate from the cap body. a nipple formed with a groove-shaped second locking portion on its outer circumferential surface; and a state in which the nipple is inserted into the sleeve such that the first locking portion and the second locking portion are substantially opposed to each other. Strong pressure is applied between the end face of the other end of the engaging portion and the end face of the punch inserted into the cylindrical space between the outer circumferential surface of the nipple and the inner circumferential surface of the sleeve, causing the outer circumference to bulge out. a metal bulge in the shape of a perforated disk whose inner circumferential portion bulges in the first locking part and is locked in the second locking part, and the mouthpiece body and the nipple are connected to each other. A hose cap characterized by being fixed by a bulging body.