JP2002340257A - Insertion opening insert fitting in pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely concentrically insert an insertion opening in a socket without complicated work. SOLUTION: This fitting for inserting the insertion opening in the socket concentrically with the socket 3 is fitted to the outer peripheral surface of the tip part of the insertion opening 2, the outer peripheral surface 1B of the fitting is formed tapered toward the tip of the insertion opening 2 concentrically with the socket 3, and one cutout 1A is formed extending over the full length in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for inserting a spigot in a pipe joint, and more particularly to a jig for surely inserting a spigot concentrically into a socket without complicated work.
The present invention relates to a jig for inserting a mouth into a pipe joint.

[0002]

2. Description of the Related Art For example, a straight pipe and a bent pipe are joined.
A pipe joining method using a push-on type joint structure having a detachment prevention function will be described.

[0003] As shown in FIG.
Notch 2 in the lock ring groove 22 through the elastic body 23
The lock ring 24 having the five is fitted. Then, FIG.
The diameter of the notch 25 of the lock ring 24 is expanded by a diameter expander 26 as shown in FIG. Then, as shown in FIG.
The holder 2 is inserted into the notch 25 of the lock ring 24 whose diameter has been increased.
7, the lock ring 24 is expanded so as to be larger than the outer diameter of the projection 29 at the tip of the insertion port 28 on the straight pipe side. Next, the insertion opening 28 is inserted beyond the lock ring 24 into the back of the receiving opening 21, and the holder 27 is removed to reduce the diameter of the lock ring 24. As a result, when a pull-out force acts on the joint, the protrusion 29 engages with the lock ring 24, and as a result,
The tube can be prevented from coming off. The elastic body 23 positions the lock ring 24 in the lock ring groove 22.

As shown in FIG. 6, a backup ring 210 and a seal packing 211 are sandwiched in a gap between the receiving port 21 and the insertion port 28, and the packing 211 is connected to a bolt 213 through a pressing ring 212. The nut 214 is pressed against the backup ring 210 to improve the sealing performance.

[0005]

However, according to the above-described prior art, since the diameter expander 26 and the holder 27 are required to reliably insert the insertion port 28 concentrically into the reception port 21, However, the insertion work was complicated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a jig for inserting an insertion hole in a pipe joint, in which the insertion hole can be reliably inserted concentrically into the receiving hole without performing complicated work. is there.

[0007]

According to the first aspect of the present invention,
A jig for inserting the insertion port concentrically into the reception port and the reception port, the jig is fitted on the outer peripheral surface of the distal end portion of the insertion port, and the outer peripheral surface of the jig faces the distal end portion of the insertion port. It is characterized in that it is tapered concentrically with the socket and has one cutout extending over the entire length in the axial direction.

The invention according to claim 2 is characterized in that it is made of a flexible material.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the insertion jig of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing an insertion jig of the present invention, FIG. 2 is a view in the direction of A in FIG. 1, and FIG. 3 is B in FIG.
FIG. 4 is a cross-sectional view showing a state before the insertion hole into which the insertion jig of the present invention is fitted is inserted into the receptacle, and FIG. 5 is a jig for the insertion of the present invention. FIG. 6 is a cross-sectional view showing a state when the insertion opening into which the is inserted is inserted into the reception opening.

As shown in FIGS. 1 to 5, an insertion jig 1 of the present invention is fitted on the outer peripheral surface of the distal end portion of an insertion opening 2 and the outer peripheral surface 1B of the jig is inserted into the distal end portion of the insertion opening 2. Heading 3
And one notch 1A is formed over the entire length in the axial direction.

The insertion jig 1 is made of a material having flexibility and slipperiness, for example, polyethylene and Teflon (registered trademark), and has a notch 1A so that the jig 1 can be freely expanded. is there. Outer peripheral surface 1B of insertion jig 1
Is equal to the inclination angle (θ) of the packing contact surface 3 </ b> A of the receptacle 1. If a tapered portion 1C is formed at the corner of the large-diameter side hole of the insertion hole jig 1, the jig 1 is inserted from the protrusion 2 </ b> A side of the tip of the insertion hole 2 to the outer peripheral surface of the insertion hole 2. It is easy to fit when fitting into.

Using the insertion jig 1 of the present invention configured as described above, the insertion opening 2 is inserted into the receiving opening 3, and
The joining is performed as follows.

First, as shown in FIG. 4, the insertion jig 1 is inserted so that the inclined surface 1B faces the socket 3 side.
Is inserted into the outer peripheral surface of the insertion opening 2 from the projection 2A side of the tip of the opening. At this time, the packing 11 and the backup ring 10 (see FIG. 6) are moved to the back of the insertion port 2 in advance.

Next, when the insertion port 2 is inserted into the reception port 3,
When the inclined surface 1B of the insertion jig 1 comes into contact with the packing contact surface 3A of the receiving port 3, the centering of the insertion port 2 is automatically performed. That is, the insertion port 2 is concentrically inserted into the reception port 3. When the insertion port 2 is further inserted, the projection 2A of the insertion port 2 is locked with the lock ring groove 3B of the reception port 3, as shown in FIG.
The lock ring 4 fitted inside is pushed out via the elastic body 5. This operation is performed reliably because the insertion opening 2 is centered.

If a lubricating material is applied to the projection 2A of the insertion port 2, the inner peripheral surface of the insertion jig 1 and the outer surface of the insertion port 2 in advance, the insertion of the insertion port 2 and the lock ring 4 can be performed. The diameter can be expanded more smoothly.

Further, when the insertion opening 2 is inserted into the interior of the receiving opening 3 beyond the lock ring 4, the diameter of the lock ring 4 is reduced.
When a pull-out force acts on the joint, the protrusion 2A engages with the lock ring 4, so that the pipe can be prevented from coming off.

Next, the insertion jig 1 is spread using a tool (not shown) and removed from the insertion hole 2. Then, the packing 211 and the backup ring 210 are moved into the gap between the insertion port 2 and the receiving port 3, and the packing 211 is
12, and is pressed against the backup ring 210 by a bolt 213 and a nut 214. (See FIG. 6) In this manner, the insertion port 2 and the receiving port 3 are joined to each other.

[0019]

As described above, according to the present invention, the insert can be inserted concentrically into the socket simply by inserting the insert into the socket, and the diameter can be increased as in the conventional case. Useful effects such as the elimination of the need for vessels and holders are provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an insertion jig of the present invention.

FIG. 2 is a view as viewed in a direction A in FIG. 1;

FIG. 3 is a view as viewed in a direction B in FIG. 1;

FIG. 4 is a cross-sectional view showing a state before the insertion opening into which the insertion jig of the present invention is fitted is inserted into the receiving opening.

FIG. 5 is a cross-sectional view showing a state in which the insertion hole into which the insertion hole jig of the present invention is fitted is inserted into the receptacle.

FIG. 6 is a cross-sectional view showing a joint structure between the insertion opening and the reception opening.

FIG. 7 is a front view showing a lock ring whose diameter is expanded by a diameter expander.

FIG. 8 is a cross-sectional view showing a socket into which a holder is inserted.

FIG. 9 is a cross-sectional view showing a state in which the insertion opening is inserted into the receiving opening into which the holder is inserted.

FIG. 10 is a perspective view showing a holder.

[Explanation of symbols]

 1: Inserting jig 1A: Notch 1B: Outer peripheral surface 1C: Tapered portion 2: Insertion opening 3: Receiving opening 3A: Packing contact surface 3B: Lock ring groove 4: Lock ring 5: Elastic body 21: Receiving Mouth 22: Lock ring groove 23: Elastic body 24: Lock ring 25: Notch 26: Diameter 27: Holder 28: Insertion 29: Projection 210: Backup ring 211: Packing 212: Press ring 213: Bolt 214: nut

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhiko Imahashi 1-8-1 Uchikanda, Chiyoda-ku, Tokyo Nihon Cast Iron Pipe Co., Ltd. (72) Inventor Tsutomu Shibuta 1-8-1, Uchikanda, Chiyoda-ku, Tokyo No. 1 F cast term in Nippon Cast Iron Tube Co., Ltd. (reference) 3H015 FA03 FA08

Claims (2)

[Claims] 1. A jig for inserting an insertion port into a receptacle concentrically with the receptacle, wherein the jig is fitted on the outer peripheral surface of the distal end of the receptacle, and the outer peripheral surface of the jig is the distal end of the receptacle. A jig for inserting an insertion hole in a pipe joint, characterized in that the jig is formed so as to taper concentrically with the socket toward the portion and has one notch extending over the entire length in the axial direction. 2. The jig for inserting an insertion hole according to claim 1, wherein the jig is made of a flexible material.