JP2005083424A - Plugging device in pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To securely plug the inside of a pipe without requiring time and labor in mounting work even if another pipe is provided in close proximity on an outer peripheral side of a pipe end part. <P>SOLUTION: This plugging device in the pipe is provided with an elastic plugging member 1 plugging the inside of the pipe by compression deformation operation from the direction of a pipe shaft center, a pair of pressing members 2 pressing the elastic plugging member from the front and rear in the direction of pipe shaft center, a fixing part 3 fixing a pressing member 2a on one side to a pipe end part, and an operation part 4 moving a pressing member 2b on the other side toward a pressing member side on one side to compress, deform, and operate the elastic plugging member. The fixing part is constituted in such a way that a plurality of pressure-contact pins 9 provided with a pressure-contact face 9a coming into pressure-contact with an inner face of the pipe on a tip side are held on the pressing member on one side radially across substantially equal interval in the peripheral direction of the pipe so as to come out and retract freely in the direction of pipe diameter and a cylindrical movable member 11 provided with a tapered face 13 capable of pushing out these contact-pressure pins to an outward side in the direction of pipe diameter by pushing-in operation from the direction of pipe shaft center to a terminal side of the pressure-contact pin is provided so as to perform pushing-in operation freely. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention provides an elastic closing member capable of closing the inside of a tube by a compression deformation operation from the tube axis direction, a pair of pressing members capable of pressing the elastic closing member from the front and rear in the tube axis direction, and the pair of pressing members A fixing portion capable of fixing one of the pressing members to the pipe end, and an operation portion capable of compressing and deforming the elastic blocking member by moving the other pressing member toward the one pressing member. The present invention relates to an in-tube obturator provided.

The in-tube obturator closes the inside of the tube by compressing and deforming the elastic blocking member inserted into the tube in a reduced diameter state from the tube axis direction with a pair of pressing members, and one pressing member of the pair of pressing members. By fixing the elastic closure member to the pipe end, the elastic closure member is pushed toward the outside of the pipe even if the inner pressure of the pipe behind the elastic closure member acts on the elastic closure member. It is made not to be issued.
In the conventional in-tube obturator, one pressing member having an annular groove for locking on the outer peripheral portion is attached to the tube end so that the annular groove protrudes from the tube end to the outside of the tube. An annular groove in which a hook-shaped locking piece is formed in one pressing member, and the elastic locking member is compressed and deformed, and a hook-shaped locking piece is formed on the radially inner side. In the pipe radial direction, that is, with the gap between the protruding end face of the hook-shaped locking piece and the bottom face of the annular groove, The one pressing member is fixed to the tube end so as not to move in the tube axis direction (see, for example, Patent Document 1).
JP-A-9-217888

For this reason, in a state where the one pressing member is fixed to the pipe end so as not to move in the tube axis direction, the displacement of the one pressing member in the tube radial direction with respect to the clamp member is permitted. Since the pressing member is not fixed concentrically with the tube axis, in order to close the inside of the tube reliably by closely contacting the elastic closing member to the inner surface of the tube over the entire circumference, Apart from the fixing operation, it is necessary for the user to adjust the posture so that one of the pressing members is fixed concentrically with the tube axis, and there is a drawback that it takes time and effort for the mounting operation.
In addition, since the clamp member is gripped on the outer peripheral side of the pipe end, if another pipe or the like is provided close to the outer peripheral side of the pipe end, the other pipe or the like becomes an obstacle, and the clamp member May be difficult to grip on the outer peripheral side of the tube end, and there is also a drawback that it is difficult to fix one pressing member to the tube end.
The present invention has been made in view of the above circumstances, and even if another pipe or the like is provided close to the outer peripheral side of the pipe end, the inside of the pipe is surely closed without taking time and effort for mounting work. The purpose is to be able to.

  According to a first aspect of the present invention, there are provided an elastic closing member capable of closing the inside of a tube by a compressive deformation operation from the tube axis direction, and a pair of pressing members capable of pressing the elastic closing member from the front and rear in the tube axis direction. And a fixed portion capable of fixing one of the pair of pressing members to the pipe end, and the other pressing member is moved toward the one pressing member to compress and deform the elastic blocking member. An in-tube obturator provided with an operable operation portion, wherein a plurality of pressure-contact pins each having a pressure-contact surface capable of being pressure-contacted to the inner surface of the tube are provided in the tube circumferential direction to constitute the fixing portion. These are held on the one pressing member radially at equal intervals and removably in the tube radial direction, and they are pushed into the proximal end side of the plurality of press-contact pins from the tube axis direction. A tapered surface that can push out the pressure contact pin outward in the pipe radial direction Lies in that is configured by providing freely pushed in the cylindrical movable member.

[Action and effect]
The elastic blocking member inserted into the tube in a reduced diameter state is compressed and deformed from the tube axis direction with a pair of pressing members to close the inside of the tube, and one pressing member of the pair of pressing members is substantially closed in the tube circumferential direction. Pushing operation that pushes the cylindrical movable member from the tube axis direction to the base end side of the multiple pressure contact pins that are radially spaced at equal intervals and that can be moved in and out of the tube diameter direction. Thus, one pressing member is formed by extruding to the outer side in the radial direction of the tube with the tapered surface provided in the cylindrical movable member and pressing the pressure contact surface provided on the distal end side against the inner surface of the tube. Can be fixed concentrically to the tube axis at the tube end.
Therefore, by pressing the plurality of press-contact pins held by one pressing member outward in the radial direction of the pipe, and press-contacting the press-contact surface provided on the tip side thereof against the inner surface of the pipe, Since one pressing member can be fixed to the pipe end, even if another pipe is provided close to the outer periphery of the pipe end, the other pressing is not particularly disturbed. The member can be fixed to the pipe end.
Also, by pressing the cylindrical movable member, the pressing surfaces of the plurality of pressing pins are pressed against the inner surface of the tube, and one pressing member is fixed to the end of the tube. The pressing member can be fixed concentrically with the tube axis at the tube end, and the elastic closing member is in close contact with the inner surface of the tube over the entire circumference without troublesome installation work. The tube can be reliably closed.

  According to a second aspect of the present invention, the press contact surfaces of the plurality of press contact pins are formed into rough surfaces.

[Action and effect]
Since the pressure-contact surfaces of the plurality of pressure-contact pins are formed as rough surfaces, the movement resistance of one pressing member in the tube axis direction is reduced in a state where the pressure-contact surfaces are pressed against the inner surface of the tube. It becomes large and can fix one pressing member to a pipe end part reliably.

Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 show an in-tube obturator A according to the present invention that can be installed in a pipe from a pipe end B of an existing buried pipe such as a gas pipe or a water supply / drain pipe and close the inside of the pipe.

  The in-tube obturator A includes an elastic closing member 1 capable of closing the inside of the tube by a compressive deformation operation from the tube axis X direction, and a pair of pressing members capable of pressing the elastic closing member 1 from the front and rear in the tube axis X direction. 2 (2a, 2b), one pressing member (hereinafter referred to as a fixed pressing member) 2a of the pair of pressing members 2, a fixed portion 3 capable of fixing the pipe 2a to the pipe end portion, and the other pressing member (hereinafter referred to as movable) (Referred to as a pressing member) 2b is moved toward the fixed pressing member 2a side to provide an operation portion 4 capable of compressing and deforming the elastic closing member 1.

  The elastic closing member 1 is formed of elastic rubber or the like into a thick cylindrical shape, and the fixed pressing member 2a and the movable pressing member 2b are substantially the same diameter as the outer diameter of the elastic closing member 1 in a state where it is not compressed and deformed. It is formed in a disc shape.

  The operation unit 4 fixes the operation shaft member 5 concentrically to the movable pressing member 2b and inserts it into the elastic closing member 1, and fixes the cylindrical shaft member 6 concentrically to the fixed pressing member 2a. A compression nut member 7 is screwed into a protruding end portion of the operation shaft member 5 inserted through the cylinder shaft member 6, and the operation nut 8 is fixed to the compression nut member 7. By being tightened to the member 6 side, the movable pressing member 2b is moved toward the fixed pressing member 2a, so that the elastic blocking member 1 inserted into the tube can be compressed and deformed from the tube axis X direction. It is.

  The fixing portion 3 pushes a plurality of pressure contact pins 9 outward in the pipe radial direction, and presses the pressure contact surfaces 9a provided at the distal end side against the tube inner surface C so that the fixed pressing member 9 2a is configured to be fixed to the tube end B concentrically with the tube axis X.

  That is, the cylindrical member 10 having an outer diameter substantially equal to the outer diameter of the fixed pressing member 2 a is fixed to the fixed pressing member 2 a in a concentric manner, and the four pressure contact pins 9 are attached to the cylindrical member 10. The formed through-holes are held in a radial manner at substantially equal intervals in the circumferential direction of the tube, and are detachable from each other in a state of being prevented from coming out outward in the radial direction of the tube.

  A cylindrical movable member 11 having a conical tapered surface 13 is externally fitted to the cylindrical shaft member 6 so as to be movable in the cylindrical axis direction with the tapered surface 13 facing the fixed pressing member 2a. The fixing nut member 12 screwed into the end portion of the member 6 is tightened to the cylindrical movable member 11 side, and the cylindrical movable member 11 is moved to the proximal end side of the four press contact pins 9 in the tube axis X direction. The taper surface 13 is inserted into a wedge shape toward the proximal end side of the four pressure contact pins 9 by a push-in operation of pushing from the side, and the pressure contact pins 9 can be pushed outward in the pipe radial direction.

  The press contact pin 9 is formed in a substantially cylindrical shape with both end surfaces being hemispherical, and the press contact surface 9a is formed in, for example, a rough surface of a pear-like surface so that the fixed pressing member 2a extends in the direction of the tube axis X. The movement resistance is increased.

  Further, a through hole 14 is formed concentrically across the operation shaft member 5 and the movable pressing member 2b, and a cock 15 that can be opened and closed is connected to the operation shaft member 5 so as to be an elastic blocking member. It is possible to measure the pressure or the like in the tube on the back side of 1, that is, in the tube closed by the elastic closing member 1.

A method for closing the inside of the pipe by mounting the above-mentioned pipe closing tool A in the pipe from the pipe end B of a pipe made of thermoplastic resin such as polyethylene resin will be described.
As shown in FIG. 3 (a), the elastic closing member 1 side is inserted into the pipe from the pipe end B, and the compression nut member 7 is lightly tightened to the cylindrical shaft member 6 side by the operating lever 8, thereby compressing. The outer peripheral surface of the deformed elastic blocking member 1 is lightly pressed against the tube inner surface C, and the tube blocker A is temporarily attached to the tube end B.

  Next, as shown in FIG. 3 (b), the fixing nut member 12 is tightened to the cylindrical movable member 11 side, and the cylindrical movable member 11 is moved to the proximal end side of the four press contact pins 9 to the tube axis. In the pushing operation of pushing in from the direction, the tapered surface 13 is inserted into the proximal end side of the four pressure contact pins 9, and the pressure contact pins 9 are pushed outward in the pipe radial direction, as shown in FIG. Bit into surface C.

  Next, as shown in FIG. 3 (c), the outer peripheral surface of the elastic blocking member 1 compressed and deformed by tightening the compression nut member 7 to the cylindrical shaft member 6 side with the operating lever 8 is further increased. The tube is firmly pressed against C to securely close the inside of the tube.

[Other Embodiments]
1. In the in-tube obturator according to the present invention, the pressure contact surface of the pressure contact pin may be formed into a rough surface by knurling.
2. The in-tube obturator according to the present invention is configured such that after the inside of the tube is reliably closed with an elastic closing member, the pressure contact pin is pushed outward in the tube radial direction, and one pressing member is fixed to the end of the tube. There may be.
3. The in-tube obturator according to the present invention may be used to close the end of a tube other than a buried tube.
4). The in-tube obturator according to the present invention may be used to close the end of a metal pipe such as a steel pipe or a cast iron pipe other than a resin pipe.

Perspective view of intraluminal obturator Partial cross-sectional view of intravascular obturator Illustration of how to use intravascular obturator Illustration of how to use intravascular obturator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elastic closure member 2 Press member 2a One press member 2b The other press member 3 Fixed part 4 Operation part 9a Pressure contact surface 9 Pressure contact pin 11 Cylindrical movable member 13 Tapered surface C Pipe inner surface X Tube axis

Claims (2)

One of the pair of pressing members, an elastic blocking member capable of closing the inside of the tube by a compressive deformation operation from the tube axis direction, a pair of pressing members capable of pressing the elastic blocking member from the front and rear in the tube axis direction, and A fixing portion capable of fixing the pressing member to the end of the tube, and an operating portion capable of compressing and deforming the elastic blocking member by moving the other pressing member toward the one pressing member. An obturator,
To constitute the fixing part,
A plurality of pressure-contact pins provided with a pressure-contact surface that can be pressure-contacted to the inner surface of the tube are held on the one pressing member in a radial manner at substantially equal intervals in the tube circumferential direction and removably in the tube radial direction. At the same time, a cylindrical movable member having a tapered surface capable of pushing the pressure contact pins outward in the radial direction of the tube by pushing the plurality of pressure contact pins toward the proximal end side from the tube axis direction is pushed in. An in-tube obturator configured to be operably provided.   The in-tube obturator according to claim 1, wherein the press contact surfaces of the plurality of press contact pins are formed into rough surfaces.

Images