JPH06257681A - Squeezing-off device - Google Patents

Abstract

PURPOSE:To squeeze off a tube, improve workability and reduce cost by applying the constitution where bearing members formed in such a way as freely rotatable in directions opposite to each other via pivotal connection arms, have approach sides and one of the sides having a crushing section approaches the tube for the passing and crushing thereof. CONSTITUTION:Pivotal shafts 4 and 5 connected to the respective lengthwise ends of both bearing members 1 and 3, are separately supported on and connected to both ends of a pivotal connection arm 6. Thus, constitution is so made that both members 1 and 3 can rotate in directions opposite to each other via the arm 6, and can relatively approach or part from each other. In addition, crushing sections 7 contributing to the collapse of a pipe P are formed on each of the approaching sides 1a and 3a of the members 1 and 3 nearing each other in two conditions after reversal. Also, rectifying sections 8 contributing to the correction of the pipe P after collapse are formed on the other approach sides.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeeze-off device, and more particularly, to a first receiving member and a first receiving member which can be arranged to face each other in a radial direction with a tube interposed therebetween and which can be relatively approached and separated from each other. Two receiving members are provided, and in a state where the pipe is positioned between the two receiving members, the receiving members are brought close to each other to clamp the pipe, and the clamped state is maintained, thereby The present invention relates to a squeeze-off device configured to crush a tube to temporarily shut off the inside of the tube.

[0002]

2. Description of the Related Art FIG. 1 shows a conventional squeeze-off device.
There was something like that shown in 1. That is, the first receiving member 1 and the second receiving member 3 which can be arranged to face each other in the radial direction with the pipe P sandwiched therebetween are provided, and one of the two receiving members 1 and 3 is provided with the second receiving member 3 of the other. The first receiving member 1 is detachably attached to the distal end portion of the movement guide body 2A that guides the movement of the first receiving member 1 toward and away from the first receiving member 1, and the second receiving member 3 is attached to the manual handle 2. The second receiving member 3 is guided by the movement guide body 2A and moved in the approaching / separating direction based on the rotation operation.
In some cases, the distance between the first receiving member 1 and the first receiving member 1 is changed. When performing squeeze-off of the pipe P using such a squeeze-off device, the pipe P is arranged between the second receiving member 3 and the first receiving member 1, and then the manual handle 2 is used. Squeeze-off of the pipe P is performed by rotating the second receiving member 3 and moving the second receiving member 3 closer to the first receiving member 1 based on the operation. Then, after performing the desired work such as pipe replacement or pipe expansion, the second receiving member 3 is moved in the separating direction based on the rotation operation of the manual handle 2 in the opposite direction, and the pipe P is moved. I was trying to release the squeeze off. However, simply releasing the squeeze-off does not return the pipe P to the original shape or a shape close to it, so prepare a pipe straightening device separately from the squeeze off device, and use the pipe straightening device, The operation of correcting the pipe P to the original shape or a shape close to the original shape has been performed.

[0003]

When performing the above-mentioned squeeze-off and the pipe straightening after the cancellation thereof by using such a conventional device, in addition to the squeeze-off device, a pipe straightening device separate from the squeeze-off device is provided. Since it is necessary and both of these devices need to be mounted and operated individually, there is a problem that the workability at the time of performing the straightening of the pipe after the squeeze-off and its cancellation is very poor. Also, to perform both of the above work,
There is also a problem that it is necessary to prepare a plurality of devices, and the cost of the devices increases. The present invention has been made by paying attention to such an actual situation, and an object thereof is to provide a means capable of solving the above-mentioned problems of workability and cost.

[0004]

The squeeze-off device according to the present invention (hereinafter referred to as the device of the present invention) is characterized in that the pipes can be arranged so as to face each other in a radial direction, and the pipes can be relatively close to each other. A first receiving member and a second receiving member that can be separated from each other, and in a state where the pipe is positioned between the two receiving members, both the receiving members are brought close to each other to clamp the pipe, and A squeeze-off device configured to squeeze the pipe and temporarily shut off the inside of the pipe by holding the clamped state, wherein the pivot shafts are attached to one end of each of the receiving members in the longitudinal direction. By respectively pivotally connecting each of them to both ends of the pivot shaft connecting arm so that the both receiving members can rotate in the mutually reversing direction via the pivot shaft connecting arm, and Both receiving members move relative to each other It is configured so that both receiving members are inverted with respect to each other, and a crushing portion that contributes to crushing the pipe is formed on one approaching surface that approaches in two forms, and on the other approaching surface. The point is that a correction portion that contributes to the correction of the tube shape after the crushing of the tube is released is formed.

[0005]

According to such a device of the present invention, one of the two receiving members, which are configured to be rotatable in the reversing direction with respect to each other via the pivot support shaft connecting arm, is provided with the crushing portion. The squeeze-off of the pipe can be executed by moving the receiving members relatively close to each other and pressing the pipe to crush the pipe after making the approaching surfaces close to each other.
After performing the desired work such as pipe replacement or pipe extension while the squeeze off is performed, the both receiving members are moved away from each other to release the squeeze off, and then the squeeze off until then. The device of the present invention, which has been used for the purpose, can also be used for straightening the pipe. That is, while the both receiving members are in a form in which the other approaching surface on which the correction portion is formed approaches, the device posture is adjusted to an appropriate angle (for example,
The pipe shape can be corrected by turning the same by 90 °) and then moving both of the receiving members toward each other in the opposite direction.

[0006]

Therefore, since the device of the present invention can be used for both squeeze-off and straightening of the pipe, the device of the present invention is common to the pipe straightening after the squeeze-off and its release. As a result, only the continuous operation is required, and thus the workability in performing the pipe straightening after the squeeze-off and the release thereof is improved as compared with the conventional workability. Moreover, the device of the present invention is the only device to be prepared for performing the squeeze-off and the straightening of the pipe after releasing the squeeze-off. Therefore, the number of devices can be reduced and the device cost can be reduced as compared with the conventional device. become.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the portions denoted by the same reference numerals as the conventional example indicate the same or corresponding portions.

1 to 7 show an embodiment of the device of the present invention. P in the figure is a gas pipe buried in the soil, and for construction such as replacement or extension of the gas pipe P, the gas pipe P is provided in the hole by providing an excavation hole in the soil. The pipe is exposed, and the apparatus of the present invention temporarily shuts off the inside of the pipe (that is, squeeze off) prior to the construction.

The device of the present invention, as shown in FIGS.
A first receiving member 1 which can be arranged to face each other in the radial direction with the gas pipe P interposed therebetween and which can be relatively approached and separated.
And a second receiving member 3. Then, while the gas pipe P is positioned between the receiving members 1 and 3, the receiving members 1 and 3 are brought close to each other to sandwich the gas pipe P, and the sandwiched state is maintained. As a result, the gas pipe P can be crushed and the inside of the pipe can be temporarily shut off.

At one end of each of the receiving members 1 and 3 in the longitudinal direction, a direction perpendicular to the longitudinal direction of each of the receiving members 1 and 3 and along the width direction of each of the receiving members 1 and 3 is provided. The pivot shafts 4 and 5 are mounted in the extended state. Each of the pivot shafts 4 and 5 is arranged so as to be fitted in recesses 1d and 3d formed by hollowing out a part of one end portion in the longitudinal direction of each of the receiving members 1 and 3 at the central portion thereof. The both ends of the pivot support arm 6 are pivotally connected to each other.
Based on the pivotal support structure, the receiving members 1 and 3 are moved relatively close to each other through the pivotal support arm 6 so that they can be rotated in opposite directions. You can do it.

As described above, the two receiving members 1 and 3 are arranged so as to be able to approach each other in the two forms by reversing each other, but in one of the two forms, the relative approaching is performed. Crushing portions 7 that contribute to the crushing of the gas pipe P are formed on the approaching surfaces 1a and 3a, respectively. It should be noted that each crushed portion 7 specifically has a central portion protruding shape in which the widthwise central portion is thick and both side edges are thin as shown in FIG. The tops of the parts are inclined along the longitudinal direction under the condition that they are parallel to each other when the receiving members 1 and 3 are in contact with each other. If such an inclination is provided, the presence of the inclination allows the gas pipe P to be crushed smoothly when the gas pipe P is squeezed off, and damage to the gas pipe P can be prevented. And so on. Further, in the other of the above-mentioned two configurations, the correction surfaces 8 that contribute to the correction of the tube shape after the crushing release of the gas pipe P are formed on the approaching surfaces 1a and 3a that relatively approach each other. ing. In addition, each of the correction portions 8 formed on the approaching surfaces 1a and 3a, specifically, is a recessed portion having a substantially semicircular shape in a side view, which is recessed on the approaching surfaces 1a and 3a, respectively. The receiving members 1 and 3 are combined in contact with each other to form a shape corresponding to the outer diameter shape of the gas pipe P).
Consists of.

One of the receiving members 1 and 3 is provided with a recess 1e at the other end in the longitudinal direction of the receiving member 1 and the other receiving member 3 is provided with a recess 1e. In the other end in the longitudinal direction, in any of the both approaching modes, it is swingable in the thickness direction of the receiving members 1 and 3 until it is housed in the recess 1e, and is housed in the recess 1e. A manual handle 2 which can be manually operated by pressing the one receiving member 1 from the outside is pivotally supported via a pivotal support member 2a.

According to the device of the present invention having such a structure, the two receiving members 1 and 3 which are rotatable with respect to each other through the pivot support shaft connecting arm 6 in the mutually reversing directions are as shown in FIG. , One of the approaching surfaces 1a and 3a formed with the crushed portion 7 approaches each other, a gas pipe P is arranged between the approaching surfaces 1a and 3a, and the gas pipe P is placed between the receiving members 1 , 3 are pressed to push the gas pipe P as shown in FIG. After the squeeze-off is performed, after performing the desired work such as pipe replacement and pipe extension, the receiving members 1 and 3 are moved away from each other to release the squeeze-off. The device of the present invention used for squeeze-off can also be used for straightening a pipe. That is, as shown in FIG. 6, the two receiving members 1 and 3 are turned to the device posture by 90 ° while the other approaching faces 1b and 3b on which the correction portion 8 is formed approach each other. As shown in FIG. 7, the shape of the gas pipe P can be corrected by moving the receiving members 1 and 3 closer to each other in the opposite direction.

Next, another embodiment of the squeeze-off device according to the present invention will be described. A hydraulic adapter 9 shown in FIG. 8 may be employed in place of the manual handle 2 in order to hold the sandwiched state in which the gas pipe P is sandwiched by bringing both the receiving members 1 and 3 close to each other. As shown in FIG. 9, the hydraulic adapter 9 has a frame body 9a which can surround the entire circumference of the other longitudinal ends of the receiving members 1 and 3 in the two approaching modes.
And is attached to a part of the short side of the frame 9a,
The cylinder rod is combined with a hydraulic cylinder 9b configured to be reciprocally movable in the holding direction and the opposite direction.

Further, in order to hold the sandwiched state in which the gas pipe P is sandwiched by bringing both the receiving members 1 and 3 close to each other, as shown in FIG. 10, the other longitudinal end portions of the both receiving members 1 and 3 are held. Are extended in a lever shape to form a pair of extended portions 10a, and a locking member 10b for locking the pair of extended portions 10a in the sandwiched state is provided with the pair of extended portions 10a.
An example in which it is provided at the extended end of one side of a is also conceivable.

Further, even for pipes other than gas pipes such as water pipes, the squeeze-off and pipe straightening can be performed by using the device of the present invention.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which the device of the present invention is used for squeeze off.

FIG. 2 is a front view showing the subsequent state.

FIG. 3 is a plan view of the device.

FIG. 4 is a bottom view of the upper receiving member.

FIG. 5 is a vertical sectional view of the device.

FIG. 6 is a front view showing a state in which the device is used for straightening a pipe.

FIG. 7 is a front view showing the subsequent state.

FIG. 8 is a front view showing a partially modified example of the device.

FIG. 9 is a side view showing a hydraulic adapter used in the modification.

FIG. 10 is a perspective view showing another embodiment of the device of the present invention.

FIG. 11 is a perspective view showing a conventional squeeze-off device.

[Explanation of symbols]

 1 1st receiving member 1a One approaching surface 1b The other approaching surface 3 2nd receiving member 3a One approaching surface 3b The other approaching surface 4,5 Pivot shaft 6 Pivot shaft connecting arm 7 Crushing part 8 Correction part P tube

Claims (1)

[Claims] 1. A first device which can be arranged so as to face each other in a radial direction with a pipe (P) interposed therebetween and which can be relatively approached and separated from each other.
The receiving member (1) and the second receiving member (3) are provided, and the receiving member (1) is placed in a state where the pipe (P) is positioned between the receiving members (1) and (3). , (3) are brought closer to each other to clamp the pipe (P), and by holding the clamped state, the pipe (P) is crushed to temporarily shut off the inside of the pipe. A device, wherein each of the support shafts (4) and (5) mounted on one end of each of the receiving members (1) and (3) in the longitudinal direction is connected to both ends of the support shaft connecting arm (6). By separately pivotally connecting the two parts to each other, the two receiving members (1), (3) can be rotated in the reverse direction through the pivotal shaft connecting arm (6). The receiving members (1), (3) are configured so as to be relatively movable toward and away from each other, and the two receiving members (1), (3) are inverted with respect to each other. On one of the approaching surfaces (1a), (3a) approaching each other, a crushing portion (7) that contributes to crushing the pipe (P) is formed, and on the other approaching surface (1b), (3a). 3b) a straightening part (8) which contributes to the straightening of the pipe shape after the crushing of the pipe (P) is released.
Squeeze-off device.