JP2004092843A - Pipe end part blocking-up device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe end part blocking-up device easy in installation to a pipe. <P>SOLUTION: This pipe end part blocking-up device is characterized by having a bottomed cylindrical body part integrally molded so as to cover an opening end part of the blocking-up pipe, a claw part arranged in the cylindrical body part so as to bite in in the radial direction toward an outer peripheral surface of the pipe by projecting from an inner peripheral surface of the cylindrical body part, a bolt hole and a bolt, arranged by the required number in the peripheral direction of the cylindrical body part so that the claw part bites in according to a screwing-in quantity, and arranged in the radial direction of the cylindrical body part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention, when connecting a large number of pipes having a relatively large diameter, for example, ductile pipes to form a pipe such as a water pipe or a gas pipe, the open end of the pipe at the beginning or end of the pipe. The present invention relates to a device for closing a pipe end.
[0002]
[Prior art]
Conventionally, for example, when closing the open end of a pipe at the end of a water pipe, a lid with a flange to cover the open end of the pipe and the pipe to fix the lid to the covered pipe are used. And a fastening hole provided on an outer peripheral edge of the securing push ring and a fastening provided on a flange of the lid body, using a retaining member fixed to the outer peripheral surface of the pipe. A technique has been adopted in which a bolt is passed through the hole in the direction of the pipe axis and fastened and fixed.
The retaining ring is an annular member having an inner diameter larger than the outer diameter of the tube and having a flange opposed to the flange, and the retaining ring is inserted in advance from the opening end side of the tube to form an outer peripheral surface of the tube. After that, the lid was put on the opening end of the pipe, and then both flanges were abutted and fastened with bolts.
[0003]
This retaining ring is a pipe connecting member originally fixed to the pipe to be connected when connecting the pipes to each other, and the flange of the retaining ring is connected to the flange of the pipe to be connected. Was connected with a pipe by fastening with bolts.
Therefore, the conventional method of closing the end of a pipe simply replaces the pipe to be connected in pipe connection with a lid with a flange, and the connection procedure and work are completely the same as the pipe connection work. It was similar.
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned conventional method, the retaining ring and the lid are configured separately, and in particular, according to the difference in diameter of the pipe, the two members must always be aligned as a set, Checking of parts management and transportation was complicated.
In addition, in connection work, in addition to the operation of fixing the retaining ring to the pipe, two operations of connecting the retaining ring and the lid are required, which is a complicated operation.
[0005]
An object of the present invention is to solve the above problems and to provide a pipe end closing device that can be easily mounted on a pipe.
[0006]
[Means for Solving the Problems]
The invention of the pipe end closing device according to claim 1 is a tubular body having a bottom integrally formed so as to cover an opening end of the pipe to be closed, and an outer periphery of the pipe protruding from an inner peripheral surface of the tubular body. A plurality of claw portions provided on the cylindrical body portion so as to be able to bite in a radial direction toward a surface, and a required number of claw portions are provided in a circumferential direction of the cylindrical body portion so as to bite the claw portions according to a screwing amount; A bolt hole and a bolt disposed in a radial direction of the body.
[0007]
According to a second aspect of the present invention, in the pipe end closing device according to the first aspect, a claw hole is provided at a bottom of the bolt hole in an axial direction of the bolt hole so as to communicate with the bolt hole. A nail portion is inserted and assembled from the bolt hole.
[0008]
According to a third aspect of the present invention, in the tube end closing device according to the first or second aspect, the claw portion is formed to have a larger width and a smaller thickness than the inner diameter of the bolt hole. Characterized in that two nail penetration grooves extending in the axial direction of the hole are formed opposite to the diameter direction of the hole.
[0009]
According to a fourth aspect of the present invention, in the pipe end closing device according to any one of the first to third aspects, the claw portion is provided with a stopper projection that contacts the bottom of the bolt hole. .
[0010]
According to a fifth aspect of the present invention, in the pipe end closing device according to the fourth aspect, the claw is pressurized with the bolt between the stopper protrusion of the claw and the bottom of the bolt hole at least in an initial use stage. Then, a cushioning member is provided to hold the blade portion so that the blade portion does not act on the pipe unless compressed.
[0011]
According to a sixth aspect of the present invention, in the pipe end closing device according to any one of the first to fifth aspects, a seal portion that closely contacts the outer peripheral surface of the pipe in the circumferential direction is provided on the inner peripheral side of the cylindrical body. It is characterized by having.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 is an external view of the device, FIG. 2 is a cross-sectional view of a main part of the device, FIG. 3 is a front view of the claw portion, FIG. 4 is a side view of the claw portion, FIG. 5 is a plan view of the claw portion, and FIG. FIG.
In FIGS. 1 and 2, reference numeral 10 denotes, for example, a pipe of a terminal of a water pipe, and reference numeral 20 denotes a pipe end closing device fitted from the open end side so as to cover the open end of the pipe 10. . Hereinafter, this pipe end closing device is also referred to as the present device or simply the device.
[0013]
This device 20 includes a bottomed cylindrical body 21 integrally formed so as to cover the open end of the tube 10, and a claw portion that protrudes from the inner peripheral surface of the cylindrical body 21 and can bite into the outer peripheral surface of the tube 10. 30, a bolt hole 41 provided in the radial direction of the cylindrical body portion 21 so as to allow the claw portion 30 to bite in the radial direction of the tube 10, and a bolt 40 screwed into the bolt hole 41.
[0014]
In FIGS. 2 to 5, the claw portion 30 is a plate-like member formed to have a larger width and a smaller thickness than the inner diameter of the bolt hole 41, and a blade portion 31 is provided at the tip thereof on the outer peripheral surface of the pipe 10. Correspondingly, it is provided in an arc shape, and a stopper projection 32 is provided at the rear end. The stopper protrusion 32 is a disk-shaped member having a diameter slightly smaller than the inner diameter of the screw hole 41 and has a diameter larger than the thickness of the claw portion 30.
Note that the stopper projection 32 is not necessarily limited to a disk shape as long as it can be locked to a hole bottom 43 described later. The operation of the stopper projection 32 will be described later.
[0015]
2 and 6, a claw hole 33 is provided in a hole bottom 42 of the bolt hole 41 in which the female screw is formed so as to communicate with the bolt hole 41 in the axial direction of the bolt hole 41. Is inserted from the bolt hole 41 and inserted into the claw hole 33 to be assembled.
The bolt hole 41 extends in the axial direction of the bolt hole 41 relative to the diametrical direction of the hole so that both side edges in the width direction of the claw portion 30 do not contact the inner peripheral surface of the bolt hole 41. The nail penetration grooves 43, 43 are formed.
The stopper projection 32 provided on the claw portion 30 contacts the bottom 42 of the bolt hole 41 to prevent the claw portion 30 from falling into the claw hole 33.
[0016]
4, in this embodiment, between the stopper projection 32 of the claw portion 30 and the hole bottom 42 of the bolt hole 41, the claw portion 30 is pressurized by screwing the bolt 40 at least at the initial use stage of the device 20. When it is pressed, a buffer member 50 is provided to hold the blade so that the blade edge of the blade portion 31 does not act on the tube 10 unless it is pressurized, for example, so as not to contact the tube.
As the cushioning member 50, for example, a double-sided tape may be attached to one surface of a sponge having an appropriate shape, and may be attached to the back surface of the stopper projection 32.
[0017]
By interposing such a buffering member 50, the claw portion 30 inserted from the bolt hole 41, when simply inserted into the claw hole 33, the cutting edge of the blade portion 31 fits in the claw hole 33, Since the device 20 is not exposed, when the device 20 is put on the opening end of the government 10, that is, when the device 20 is fitted, the blade portion 31 does not easily get caught on the surface of the tube 10, and can be mounted smoothly.
In this state, when the bolt 40 is screwed into the bolt hole 41 or the bolt 40 which has been screwed shallowly is screwed deeply and the rear end portion of the claw portion 30 is pressed, the cutting edge of the blade portion 31 is attached to the outer peripheral surface of the pipe 10. It bites and locks, preventing the device 20 from falling off (falling out) from the tube 10.
[0018]
The fixing means including the claw portion 30, the bolt hole 41, and the bolt 40 are arranged at equal intervals in the circumferential direction of the cylindrical body portion 21 in this example at three places (see FIG. 1).
As shown in FIG. 1, the bolts 40 are not pressed against the claw portions 30 or are loosened to such an extent that the blade portions 31 are not exposed even when pressed, so that each component part serving as a component of the apparatus can be used. It can be handled as a single component in a state where it is integrated with the present apparatus 20.
[0019]
Referring again to FIG. 2, a concave seal groove 61 is provided on the inner peripheral surface side of the cylindrical body 21 in a circumferential direction around the inner peripheral surface, and an annular seal member 62 is fitted into the seal groove 61 to form the seal portion. 60 are provided.
At an appropriate position in the width direction (tube axis direction) of the seal groove 61, a projecting ridge 63 having a convex cross section slightly protruding from the inner surface of the seal groove 61 is provided in the circumferential direction, and fitted into the seal groove 61. The sliding (movement) of the seal member 62 in the tube axis direction is prevented.
Accordingly, when the cylindrical body portion 21 is attached to and detached from the pipe 10, the sealing member 62 does not drop off or become unbalanced due to contact with the outer peripheral surface of the pipe 10, and can be smoothly attached and detached.
[0020]
According to the present apparatus 20 of the first embodiment, the tube 10 of the terminal can be closed by one operation of fitting the cylindrical portion 21 to the open end of the tube 10 and screwing the bolt 40.
Further, since the components of the present device 20 are integrated into the cylindrical body portion 21, the device itself can be handled as a single unit (single member), and the work of managing and transporting the device is easier than before. It becomes.
[0021]
In addition, the pipe end closing device 20 is provided with an air vent hole and a water and mud vent hole which are located on the top and bottom sides (the device is fitted so as to be positioned) when the tube end closing device 20 is mounted. However, they are omitted in the figure.
[0022]
【The invention's effect】
According to any one of the first to sixth aspects of the present invention, it is possible to easily and quickly close the open end of the pipe simply by fitting the cylindrical body portion to the open end of the pipe and tightening the bolt.
In addition, since each component is integrally provided in the cylindrical portion that closes the opening end, the device itself can be handled as a single unit (single member), and operations such as management and transportation of the device are conventionally performed. It is easier than
[0023]
Also, a cushioning member is arranged between the stopper protrusion and the screw bottom, and at least in the initial use stage, the claw portion is settled in the claw hole, so that the claw touches the official as in the conventional case and covers the tube. The covering operation can be performed smoothly without causing difficulty in the operation.
[0024]
According to the sixth aspect of the present invention, not only the fixing means but also the seal portion are previously provided integrally with the cylindrical portion, so that the device itself can be handled as a single unit (single member). Operations such as management and transportation of the device are facilitated.
[Brief description of the drawings]
FIG. 1 is an external view of the present apparatus.
FIG. 2 is a sectional view of a main part of the apparatus.
FIG. 3 is a front view of a claw portion of the present apparatus.
FIG. 4 is a side view of a claw portion of the device.
FIG. 5 is a plan view of a claw portion of the present apparatus.
FIG. 6 is a cross-sectional view of a screw hole of the apparatus.
[Explanation of symbols]
10 pipe, 20 pipe end closing device (this device), 21 cylinder, 30 claw, 31 blade, 32 stopper projection, 33 claw hole, 40 bolt, 41 bolt hole, 42 hole bottom (bolt hole), 43 nail through hole, 50 cushioning member.

Claims (6)

A bottomed cylindrical body integrally formed so as to cover the open end of the pipe to be closed; and the cylindrical body protruding from the inner peripheral surface of the cylindrical body and being able to bite in the radial direction toward the outer peripheral surface of the pipe. Claws provided in the portion, a required number of circumferentially arranged in the circumferential direction of the cylindrical body portion so as to bite the claw portion according to the amount of screw, a bolt hole provided in the radial direction of the cylindrical body portion, A pipe end closing device comprising a bolt. A claw hole is provided at the bottom of the bolt hole in communication with the bolt hole in the axial direction of the bolt hole, and a claw portion is inserted into the claw hole from the bolt hole and assembled. 2. The pipe end closing device according to 1. The claw portion is formed to have a larger width and a smaller thickness than the inner diameter of the bolt hole, and the claw portion is formed with two claw through grooves extending in the axial direction of the hole in a direction opposite to the diameter direction of the hole. The pipe end closing device according to claim 1 or 2, wherein: The pipe end closing device according to any one of claims 1 to 3, wherein the claw portion is provided with a stopper projection that contacts the bottom of the bolt hole. Between the stopper projection of the claw portion and the bottom of the bolt hole, at least in the initial use stage, the claw portion is compressed when pressed with a bolt, and is held so that the blade portion does not act on the tube unless pressed. The pipe end closing device according to claim 4, wherein a buffer member is provided. The pipe end closing device according to any one of claims 1 to 5, wherein a seal portion that closely contacts the outer peripheral surface of the pipe in the circumferential direction is provided on the inner peripheral side of the tubular body.

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