JPH08200580A - Bent pipe coupling and inserting method for pipe body - Google Patents

Abstract

PURPOSE: To enable the insertion of a pipe body to be easily performed, so as to improve workability in a site by providing an engaging part to be engaged with an engaging member to be arranged on the extension of a center axis of a connecting end on the outer surface of a coupling main body. CONSTITUTION: When a polyvinyl chloride-made pipe body A is connected to a bent pipe coupling C, a lever 19a is oscillated in a state where it is engaged between the outer surface of a coupling main body 1 and a base end of an engaging part 18 after a connecting end 2 of the bent pipe coupling C and the end of the pipe body A are faced to each other. The bent pipe coupling C receives pressing force and is moved to the pipe body A side, and the pipe body A is inserted into the connecting end 2 of the bent pipe coupling C. In this case, since the lever 19a is arranged on the extension of the center axis 20 of the connecting end 2, pressing force by the lever 19a is approximately uniformly applied to one end side of the bent pipe coupling C to approximately straight move the pipe coupling C to the pipe body A side, and therefore, the end of the pipe body A can be accurately inserted into the connecting end 2 of the bent pipe coupling C without core deviation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inserting a curved pipe joint and a pipe body, and more particularly to a method for inserting a curved pipe joint such as an elbow and a bend and a pipe body.

[0002]

2. Description of the Related Art Conventionally, when a pipe is inserted and connected to a straight tubular pipe joint, a dedicated device including a wire and an inserting machine (puller) is used. There is an advantage that the work can be performed relatively easily.

[0003]

However, when the pipe joint is a curved pipe such as an elbow or a bend, it is difficult to apply the above means because the straight pipe portion is short. The reality is that there is no suitable specialized equipment. For this reason, the work on the site becomes very complicated, and there is a problem that a great burden is imposed on the operator especially when the pipe diameter is large.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and by utilizing the shape of the bent pipe joint, it is possible to easily insert the pipe body and to make it on site. The task is to make a great contribution to the convenience of work in the field.

[0005]

[Means for Solving the Problems] That is, in order to solve the above-mentioned problems, the means adopted by the present invention is such that at the time of connecting the pipe body A and the pipe body B, at least one of the pipe bodies is of the joint body 1. In a curved pipe joint to be inserted into the connecting end portion 2, the central axis of the connecting end portion 2 is formed on the outer surface of the joint body 1 so that the pipe body or the joint body 1 can be moved to insert the pipe body. The point is that an engaging portion 18 that engages with an engaging member 19 arranged on an extension line of 20 is provided.

Further, a feature of the method of inserting the pipe body according to the present invention is that at the time of connecting the pipe bodies A and B, at least one of the pipe bodies is inserted into the connecting end portion 2 of the bent pipe joint C. In the method, after the pipe body and the connecting end portion 2 of the curved pipe joint C are arranged so as to face each other, the engaging member 19 is engaged with the engaging portion 18 provided on the outer surface of the curved pipe joint C, and the engagement is performed. With the mating member 19 arranged on the extension of the center line 20 of the connecting end portion 2 of the curved pipe joint C,
The point is to move and insert the curved pipe joint C or the pipe body.

[0007]

Therefore, in the case where a pipe is inserted into a pipe joint characterized by the above-mentioned structure for connection, first, the end of the pipe to be connected and the connection end 2 of the joint body 1 are arranged to face each other, Engage an engaging member 19 such as a lever or a pile with the engaging portion 18 of the joint body 1,
The joint body 1 is pushed and moved by the engagement member 19 toward the pipe body, or the pipe body is moved to the joint body 1 side while the joint body 1 is fixed by the engagement member 19 and the end portion thereof is Insert into the connecting end 2 of the fitting. In this case, since the engaging member 19 is arranged on the extension line of the central axis 20 of the connecting end portion 2, the pipe body can be easily and accurately inserted into the joint body 1.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a joint body which is provided with connecting ends 2 at both ends and is bent at a substantially right angle.
A pair of arcuate projecting pieces 3 are provided opposite to each other at the tip of the connecting end 2, and a seat 4 having a screw hole 4a is radially provided at a substantially central portion of each projecting piece 3. Reference numeral 5 denotes a bolt screwed into the screw hole 4a of the seat 4, the tip of which is formed in a substantially conical shape. Reference numeral 6 is an annular convex portion provided on the inner peripheral surface of the connecting end portion 2, and reference numeral 7 is a notch formed at a side edge of the connecting end portion 2.

Reference numeral 8 is an inner ring internally mounted on the outside of the annular convex portion 6, and the inner ring 8 has a partial cutout 9 as shown in FIG. The outer diameter D is larger than the outer diameter D, and the tapered surface formed on the outer periphery of the outer diameter D is narrower on the fitting side of the tubular body A.
As described above, the first taper surface 10 and the second taper surface 11 having a larger inclination angle than the first taper surface 10 are formed.

Reference numeral 12 is an outer ring, which is also internally mounted on the end of the joint body 1, and has a tapered surface formed on the inner periphery thereof, the tapered surface being the same as the second tapered surface 11 of the inner ring 8. The first tapered surface 13 having an inclination angle and the first inner ring 8
The taper surface 10 and the second taper surface 14 having the same inclination angle are formed so that the width becomes narrower toward the fitting side of the tubular body A, and the third end is formed on the outer circumference on the other end side. Tapered surface 15
Is provided.

Numeral 16 is a concave groove provided inside the annular convex portion 4 of the joint main body 1. A packing 17 is attached to the concave groove 16 to achieve a seal between the joint main body 1 and the pipe A. There is.

Reference numeral 18 denotes a tongue-like engaging portion projectingly provided on the outer surface of the bent portion of the joint body 1, and is engaged between the base end portion and the outer surface of the joint body 1 as shown in FIG. A member 19, for example a rod-shaped lever 19
The engaging member 19 is arranged on the extension line of the central axis 20 of the connecting end portion 2 of the joint body 1 when the a or the pile 19b is engaged.

Although this embodiment has the above-mentioned configuration,
The inner ring 8 and the outer ring 12 are mounted inside the joint body 1 in advance, and the tip of the bolt 5 is the third taper surface 15 of the outer ring 12.
If the two rings 8 and 12 are prevented from coming off from the joint body 1 by being screwed so as to be engaged with the joint body 1, the joint body 1 is used for transportation such as transportation and piping work.

When a pipe A made of, for example, vinyl chloride is connected to the curved pipe joint C, first, the curved pipe joint C is used.
After making the connecting end portion 2 and the end portion of the pipe A face each other, the lever 19
When the lever 19a is swung in a state where a is engaged between the outer surface of the joint body 1 and the base end of the engaging portion 18, the curved pipe joint C receives a pressing force and moves to the pipe body A side, The pipe A is inserted into the connecting end 2 of the bent pipe joint C.

In this case, the lever 19a is the central axis of the connecting end 2.
Since it is arranged on the extension line of 20, the pressing force by the lever 19a is applied to the one end side of the bent pipe joint C substantially evenly.
Since the pipe joint C can be moved substantially straight to the pipe body A side,
The end of the pipe A can be accurately inserted into the connecting end 2 of the pipe joint C without the core being displaced.

Further, since the movement of the curved pipe joint C is caused by the lever 19a, the burden on the operator is reduced, and even if the pipe diameter is large, the work on the site is not complicated and the efficiency is improved. Can be done

Next, when inserting the pipe B into the connecting end 2 at the other end of the curved pipe joint C, the opposite side of the engaging portion 18 of the curved pipe joint C is used. That is, at one end of the pipe body B, the curved pipe joint C
After the connecting end portions 2 of the pipe B are opposed to each other, the pipe B is bent from the other end of the pipe B using a lever or the like with the engaging portion 18 engaged with the pile 19b. It may be inserted into the continuous end portion 2.

In this case, the pile 19b reliably blocks the movement of the bent pipe joint C, so that the pipe body B can be accurately inserted into the pipe joint C.

As described above, the curved pipe joint C or the pipe bodies A and B
Depending on which one is moved and inserted, the lever 19a and the pile 19
By arbitrarily selecting the engaging member 19 such as b and engaging it with the engaging portion 18 of the curved pipe joint C, it is possible to perform the appropriate insertion according to the situation at the site.

After that, when each bolt 5 is screwed in, the outer ring 12 is moved to the inner ring 8 side through the third tapered surface 15 of the outer ring 12 by its tip, and the tapered surfaces of both rings 8 and 12 are moved. Since the inner ring 8 receives an inward pressing force via
The inner ring 8 contracts in diameter and comes into pressure contact with the outer peripheral surfaces of the tubular bodies A and B.

As a result, the tubular bodies A and B are held in pressure contact with the entire inner peripheral surface of the inner ring 8, and the pressure contact area can be secured, so that both can be firmly and reliably connected.
Therefore, the pipe bodies A and B will not be accidentally detached from the joint body 1.

Further, for example, when a tensile force above a certain level is applied to the pipes A and B, the inner ring 8 is formed between the second tapered surface 14 of the outer ring 12 and the outer peripheral faces of the pipes A and B. Space 21
It will enter inside and the tensile force will be absorbed.

When the inner ring 8 enters, the first taper surface 9 and the outer ring 12 of the inner ring 8 having a small inclination angle.
Since the second taper surface 14 is engaged, the pressure contact force between the pipes A and B by the inner ring 8 gradually increases, and the pipes A and B are not damaged even if the tensile force is suddenly applied. The tube bodies A and B are pressed against and held by the inner peripheral surface of the inner ring 8 with an appropriate pressing force without causing any damage. This prevents the tubular body A from being pulled out from the joint body 1.

In the above embodiment, the joint body 1 is formed by bending at a substantially right angle, but the bending angle is not limited to this, and the joint body 1 is, for example, as shown in FIG. May be configured.

Further, the configuration of the shape of the engaging portion 18 is not limited to that in the above embodiment, and for example, a concave groove which can be engaged with the engaging member 19 is formed on the outer surface of the joint body 1 and the engaging groove is engaged. The portion 18 may be provided, and the number thereof may be plural as shown in FIG. 4 according to the shape of the joint body 1.

Further, the engaging member 19 is not limited to the lever 19a and the pile 19b as in the above-mentioned embodiment, and the point is that the pipe body is bent to form the pipe joint C.
It suffices as long as the pipe joint C can be moved or fixed so that the pipe joint C can be inserted.

Although the pipe body made of vinyl chloride is connected to the joint body 1 in the embodiment, the present invention is also applicable to a pipe body made of, for example, a thin-walled steel pipe. The material does not matter.

In addition, the means for preventing separation of the pipe body inserted in the curved pipe joint C and a series of construction procedures can be changed within the scope intended by the present invention.

[0030]

As described above, according to the present invention, the pipe body or the joint body is formed by engaging the engaging member provided on the outer surface of the joint body with the engaging member such as a lever or a pile. Since the tubular body can be easily inserted into the connecting end portion of the joint body by moving and the engaging member is arranged on the extension line of the central axis of the connecting end portion, It is possible to insert it accurately, which has resulted in the remarkable effect that the work at the site can be greatly simplified.

Further, as described above, since the bent pipe joint according to the present invention has a very simple structure, it has a practical effect that it can be easily manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a partial sectional front view showing an embodiment of a curved pipe joint according to the present invention.

[FIG. 2] (a) is the same plan view, (b) is an end view.

3A is a rear view of the inner ring, and FIG. 3B is a partial sectional view.

FIG. 4 shows another embodiment, (a) is a partial sectional front view,
(B) is a view from the arrow D of (A).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Joint body 2 ... Connection end 18 ... Engagement part 19 ... Engagement member 19a ... Lever 19b ...
Pile 20 ... Central axis A ... Pipe B ... Pipe C ... Curved pipe joint

Claims (4)

[Claims] 1. At the time of connecting the pipe body (A) and the pipe body (B), at least one of the pipe bodies is a connecting end of the joint body (1).
In the curved pipe joint to be inserted into (2), the joint body should be inserted so that the pipe body or joint body (1) can be moved to insert the pipe body.
The outer surface of (1) is provided with an engaging portion (18) that engages with an engaging member (19) arranged on the extension line of the central axis (20) of the connecting end portion (2). Curved pipe joint characterized by. 2. The engaging member (19) is a lever (19a) or a pile.
The curved pipe joint according to claim 1, which is (19b). 3. When connecting the pipes (A) and (B), at least one of the pipes is bent and the connecting end of the pipe joint (C) is formed.
(2) by inserting the pipe body and the connecting end portion (2) of the curved pipe joint (C) so as to face each other, and then engaging the engaging portion (on the outer surface of the curved pipe joint (C) ( With the engaging member (19) engaged with 19), the engaging member (19) is arranged on an extension of the center line (20) of the connecting end (2) of the curved pipe joint (C), The curved pipe joint
(C) or a method of inserting a tubular body, which comprises moving and inserting the tubular body. 4. The engagement member (19) is a lever (19a) or a pile.
The method for inserting a tubular body according to claim 3, which is (19b).