JP2587529Y2 - Packing for fitting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing for a joint having improved fitting to a joint.

[0002]

2. Description of the Related Art Conventionally, this type of joint packing disclosed in Japanese Utility Model Laid-Open No. 58-94086, FIGS.
And the packing for couplings shown in FIG. 6 is known.

The joint packing 1 is made of a soft resin and is formed in a flat cylindrical shape. One of the openings 1a has a small diameter, and the other opening 1b opposed to the opening 1a has a large diameter. While the inner and outer surfaces are formed to be inclined, a plurality of projections 1c are formed on the periphery of the opening 1b.

The joint packing 1 thus constructed is interposed between a joint part 2 and a pipe 4 to which a flare nut 3 is fixed, as shown in FIG. This joint part 2
Has a tapered outer surface, and the outer surface is formed to have the same inclination as the inner surface of the joint packing 1. On the other hand, the distal end of the pipe 4 has a tapered outer surface. The joint packing 2 is formed in the same manner as the inclination, and the joint part 2 and the pipe 4 are connected in an airtight state by the joint packing 1.

[0005]

By the way, as shown in FIG. 6, the joint packing 1 constructed as described above is brought into contact with the tip of the joint part 2 through the opening 1b on the large diameter side. Alternatively, the pipe 4 is stored in the flare nut 3 in advance.
Abut on the tip of the lens via the opening 1a on the small diameter side.
The joint part 2 and the flare nut 3 are screwed together. This allows
The joint packing 1 is interposed between the joint part 2 and the pipe 4.

[0006] However, in the former method, the joint packing 1 is brought into contact with the tip of the joint part 2 to be connected.
At the time of this connection work, the joint packing 1 must be constantly held down with one hand, which is troublesome, and the joint packing 1 often comes off and falls. Further, in the method of storing the joint packing 1 in the flare nut 3 as in the latter, there are many cases where the stored joint packing 1 does not abut the tip of the pipe 4 accurately. That is, as shown in FIG. 7, since the projection 1c of the joint packing 1 is fitted into the female screw portion of the inner surface of the flare nut 3 and locked, the joint packing 1 enters obliquely, and in this state. To fix the joint part 2. For this reason, there is a problem that airtight leakage occurs.

An object of the present invention is to provide a joint packing which can be easily mounted and does not cause gas-liquid leakage in view of the above-mentioned conventional problems.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problem by providing a pipe having a tip inner surface formed to have a larger diameter toward the tip, and a ring parallel to the axis at the tip. when the fitting component from the first outer circumferential surface and the first outer peripheral side surface which is formed and a second outer peripheral surface which is smaller in diameter toward the distal end connection is tightened by a nut to the tip of the tubing and the joint packing interposed between the該継hand part of the tip portion, the second outer peripheral side surface of the contact the entire inner surface in surface contact with the front end inner surface of the entire outer surface the pipe the fitting parts surface contact contact with the packing body of the cylindrical truncated cone shape, and a plurality of tongue-shaped fitting holding portion to be press-fitted to the first outer peripheral side surface of該継hand part extending from the periphery of the packing body, the packing body and the Features that the fitting holding part is made of soft resin To.

[0009]

According to the present invention, when connecting a pipe and fitting component via a packing fitting in advance packing main body of the second outer circumferential first outer circumferential mating holder with contacts the side surface of the fitting component Press into the side. As a result, the joint packing is held by the joint component. After that, the outer surface of the joint packing may be brought into contact with the inner surface of the tip of the pipe and connected. Here, since the fitting holding portion is formed in the tongue in and soft resin, when press-fitting the fitting holding portion to the first outer peripheral surface of the fitting component, fitting the holding portion and the fitting component is surface contact And the holding force becomes very large, and the joint parts are not damaged.

[0010]

1 to 3 show an embodiment of the present invention. FIG. 1 is an overall perspective view of a joint packing, and FIG. 2 is a partially broken cross-sectional view showing a state where the joint packing is interposed. FIG. 3
FIG. 4 is an assembled perspective view showing a method of attaching a joint packing. The same components as those of the conventional example described with reference to FIGS. 4, 5, 6, and 7 are denoted by the same reference numerals.

That is, 2 is a joint part to which one pipe (not shown) is connected at the rear end (right side in FIG. 2), and 3 is a flare nut functioning as a joint part fixed to the front end side of the other pipe 4. is there. The fitting component 2 has become the tip end (left side in FIG. 2) of the connecting portion 21, the first outer circumferential surface and the first outside the tip formed in an annular shape parallel to the axis and a second outer peripheral surface which is smaller in diameter (inclined surface 22) toward the distal end from the peripheral side surface. On the other hand, the distal end of the pipe 4 is also a connecting portion 41, and the inner surface of the distal end is inclined (inclined surface 42) so that the diameter gradually increases toward the outside.

The packing 10 for a joint according to the present invention is shown in FIG.
It is configured as shown in FIGS. That is, the joint packing 10 is formed of a soft resin and includes a packing main body 11 having an airtight function and a fitting holding section 12 for fixing the packing main body 11. The packing body 11 has a flat cylindrical shape. One opening 111 has a small diameter, and the other opening 112 facing the opening 111 has a large diameter, and the inner and outer surfaces thereof are inclined (inclined surface 113). , 114). This inner slope 11
3 is a slope corresponding to the slope 22 of the joint part 2, and
The outer inclined surface 114 is formed with an inclination corresponding to the inclined surface 42 of the pipe 4. Due to such a structure of the packing body 11, as shown in FIG. 2, a connection boundary surface constituted by the inclined surface 22 of the joint part 2 and the inclined surface 42 of the pipe 4 is airtightly connected.

On the other hand, the fitting holding portion 12 of the joint packing 10
So extends plurality of openings 112 of the packing body 11 in the axial direction tongues, the fitting holding portion 12 is press-fitted to the outer surface of the connecting part 21 joint parts 2 (first outer peripheral surface) I have.

When such a joint packing 10 is interposed and connected between the pipe 4 to which the flare nut 3 is fixed and the joint part 2, it is performed as shown in FIG.

That is, the inclined surface 2 of the connecting portion 21 of the joint part 2
2 is fitted with the large-diameter opening 112 of the joint packing 10 in a corresponding manner. At this time, the fitting holding portion 12 of the joint packing 10 is pressed into the outer surface of the connection portion 21, and the joint packing 10 is fixed to the joint component 2.

When the operation of fixing the joint packing 10 to the joint part 2 is completed, the joint part 2 with the joint packing 10 mounted thereon is inserted into the flare nut 3. Thereafter, the flare nut 3 is pressed so that the inclined surface 114 outside the joint packing 10 and the inclined surface 42 of the pipe 4 are pressed against each other.
The screw part of the joint part 2 is screwed into the screw part. Thereby, the interposing work of the joint packing 10 is completed.

As described above, according to the present embodiment, in the interposing work of the joint packing 10, the joint packing 10 is connected to the joint part 2 before the flare nut 3 and the joint part 2 are screwed together.
Can be held in advance, so that the assembling work is simplified.

Further, since the joint packing 10 can be properly mounted, gas-liquid leakage does not occur after assembly.

[0019]

[Effects of the Invention] As described above, according to the present invention,
Since the engagement holding portion is formed in the tongue in and soft resin, when press-fitting the fitting holding portion to the first outer peripheral surface of the fitting component, fitting the holding portion and the fitting component is a surface contact, the The holding power is very high and the joint parts are not damaged.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a packing for a joint of the present invention.

FIG. 2 is a partially cutaway sectional view showing a state in which the joint packing of the present invention is interposed.

FIG. 3 is an assembled perspective view showing a method of mounting the joint packing of the present invention.

FIG. 4 is an overall perspective view showing a conventional packing for a joint.

FIG. 5 is a partially cutaway sectional view showing a state in which a conventional packing for a joint is interposed.

FIG. 6 is an assembled perspective view showing a conventional method for mounting a packing for a joint.

FIG. 7 is a cross-sectional view showing a defect of a conventional packing for a joint.

[Explanation of symbols]

2 ... Joint parts, 3 ... Flare nut, 10 ... Packing for joint, 11 ... Packing body, 12 ... Fitting holding part, 21, 4
1 ... connection part, 22, 42, 113, 114 ... inclined surface.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiji Koyama 20th Kotobukicho, Isesaki-shi, Gunma, Japan (72) Inventor Katsutoshi Nakazawa 20th Kotobukicho, Isesaki-shi, Gunma, Japan Sanden Co., Ltd. (72) Inventor Toshio Tadokoro, Sanden, 20-20, Kotobukicho, Isesaki-shi, Gunma (72) Inventor Akihiro Hotta, 20th Sanden, Kotobukicho, Isesaki, Gunma, Japan In-house (56) References JP-A-62-270887 (JP, A) JP-A-61-1793 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16L 19/00- 19/08

Claims (1)

(57) [Scope of request for utility model registration] 1. A piping having a tip inner surface which is formed with a larger diameter in accordance with the distal end portion toward the tip, the first outer circumferential surface and the first outside the distal end portion formed in parallel annular to the axis when connecting the joint parts are tightened by a nut and a second outer peripheral surface which is smaller in diameter toward the distal end from the peripheral side surface, it is interposed between the tip and該継hand part of the front end portion of the pipe in that packing fitting, it abuts the inner surface total in surface contact across outer surface on the tip inner surface of the pipe
Cylinder the body abuts with surface contact with the second outer peripheral surface of the fitting component
The packing body in the form frustoconical, and a plurality of tongue-shaped fitting holding portion to be press-fitted to the first outer peripheral side surface of該継hand part extending from the periphery of the packing body, the packing body and the fitting holding A packing for a joint, wherein a part is formed of a soft resin.