JPH0762968A - Fitting/removing device for tube body - Google Patents

Abstract

PURPOSE:To efficiently connect or disconnect rods together in a short time. CONSTITUTION:A hydraulic cylinder 12 is rotatably fitted at one end section of a base plate 11. A locking connection member 14 is rotatably fitted to the piston section of the hydraulic cylinder 12. Tube body holding split pieces 15, 16 each formed with a circular arc-shaped recess on the inner periphery are rotatably provided on the other end side of the locking connection member 14. When the cylinder 12 is extended, a lock receiving claw piece 16a formed at the tip section of the tube body holding split piece 16 is pressed and supported by a lock claw piece 14a formed on the other end side of the locking connection member 14, a rod 3A incorporated in the tube body holding split pieces 15, 16 is held, and the held rod 3A is rotated around the axis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe attaching / detaching device which is a combination of a link type rotary wrench and a link type fixed clamp used for connecting and disconnecting threaded pipes.

[0002]

2. Description of the Related Art For example, when a rod such as an excavation pipe or an exploration pipe is buried in the ground, a large number of short rods are prepared in advance, and a new drill rod is sequentially attached to the rear end of the drill rod. While connecting, the drill rod penetrates deep into the ground.

Conventionally, in the work of connecting such rods, one of the rods is manually rotated using a pipe wrench or a chain wrench to connect or disconnect the rods.

In the case of a rotary drill rod or the like,
First, the new rod is clamped by the clamp on the guide cell, the drifter is advanced and rotated to connect, then the clamp is opened and further advanced, and the tip of the new rod is attached to the rear end of the existing rod fixed by the clamp. And the new rods are rotated by a drifter and moved forward to connect the rods. In the case of disconnecting the rod, the reverse procedure is followed.

[0005]

However, when connecting the rods using the pipe wrench or the chain wrench, it is very troublesome to set these wrenches, and the fixed side is straddled across the connecting portion. It is necessary to set it on both the rod and the rotation side rod, and since the rotation force is human power, it takes a lot of labor to rotate the heavy rod.

In order to obtain a large torque by human power, a torque rod having a certain length must be used, and a work space corresponding to the torque bar is required. Also, since most of the work depends on human power, it is a dangerous work. Further, since the force due to the torque is often locally concentrated on a part of the outer surface of the tube, there is a defect that a recess is easily formed on a part of the outer surface of the rod.

On the other hand, in the case of the rotary drill rod, as described above, the repetitive operations of the clamp operation and the drifter operation increase, the work becomes complicated, and it takes time to connect / disconnect one rod. Has become.

On the other hand, in recent years, with the use of underground space, boring work from the underground hole has been frequently performed.
When it is necessary to frequently perform the rod attaching / detaching work in a narrow underground space, the rod attaching / detaching work is a very burdensome work.

Therefore, according to the present invention, the pipe can be easily attached to the pipe body, and the work can be smoothly performed even in a compact and narrow working space. Furthermore, the connecting and disconnecting of the rods can be efficiently performed in a short time. An apparatus for attaching and detaching the obtained tube is provided.

[0010]

SUMMARY OF THE INVENTION The above-mentioned problem is that a cylinder is rotatably attached to one end of a fixing member, and a lock connecting member is rotatably attached to a piston portion of the cylinder. At least two or more pipe gripping divided pieces each having an arcuate concave portion along the pipe shape formed on the inner peripheral surface thereof are rotatably connected to the other end side, and the pipe gripping divided piece group forms a pipe. When the cylinder extends from the state in which the body is enclosed, the lock receiving pawl formed at the tip end of the pipe gripping division piece at the endmost side by the lock pawl piece formed at the other end side of the locking connecting member. A link-type rotary wrench, which presses and supports one piece, grips the tubular body contained in the tubular body gripping divided piece group, and rotates the grasped tubular body around the axis. Can be solved with. Here, the link-type rotary wrench is configured such that, in the most extended state of the cylinder, the lock connecting member and the pipe gripping divided piece are more than the line connecting the shaft connecting the piston and the lock connecting member with the center of the pipe. It is desirable that the shaft connecting the and is in a connected state in which the shaft is located closer to the cylinder.

Further, at least two or more consecutive tube gripping pieces each having an arcuate recess along the tube shape formed on the inner peripheral surface thereof are rotatably connected to each other. ,
A cylinder is rotatably supported by a projecting extension piece formed at one end of the cylinder, and a lock connecting member is rotatably attached to a piston portion of the cylinder. The end side is rotatably supported by the base end portion of the protruding extension portion, and the extension operation of the cylinder from the state in which the tubular body is surrounded by the tubular body gripping divided piece group causes the other of the locking coupling member to move. The lock claw piece formed on the end side presses and supports the lock receiving claw piece formed on the tip end of the tubular body holding split piece on the other end side, and the tubular body contained in the tubular body holding split piece group is On the other hand, a link-type fixed clamp, which is formed integrally with the tubular body gripping divided piece while holding the tubular body, prevents the tubular body from rotating by colliding with a stopper member arranged in close proximity thereto, Combination with a link type rotary wrench It becomes a tubular body of the detachable device.

[0012]

In the present invention, the cylinder is extended by enclosing the pipe body with the pipe body gripping divided piece group,
A lock claw piece formed on the other end side of the lock connecting member presses and supports the lock receiving claw piece formed at the tip of the tube gripping division piece on the most end side to grip the contained tube body. To do. If you extend the cylinder further from this state,
It is possible to rotate the gripped tubular body around the axis.
As described above, in the case of the device of the present invention, the tube can be rotated by simply closing the tube gripping divided piece and extending the cylinder, so that the tube can be easily set and the work is very efficient. Target.

In the most extended state of the cylinder,
From the line connecting the shaft connecting the piston and the lock connecting member and the center of the pipe body, the shaft connecting the lock connecting member and the pipe gripping divided piece is in the connected state in which it is located closer to the cylinder, As shown in FIG. 7, when the rod 3A is rotated and the cylinder is contracted from the fully expanded state, the shaft 19 and the shaft 1 of the pulling force P by the hydraulic cylinder 12 are
By the component force P _{f in the} direction of the straight line R connecting 8 and 8, the lock claw piece 14a of the lock connecting member 14 is not released,
The tubular body gripping divided pieces 15 and 16 are rotated clockwise. At this time, the gripping force of the rod 3A by the pipe gripping divided pieces 15, 16 is slightly weakened, so that only the pipe gripping divided pieces 15, 16 are rotated without co-rotating the rod 3A. After that, when the stroke of the cylinder 12 reaches L ₁ (line S), the claw piece 1 of the lock connecting member 14
4a is released, but when the stroke is stopped here and the hydraulic cylinder 12 is then extended again, the pawl piece 14a of the locking connection member 14 causes the tubular body gripping split piece 16 to move.
The rod 3A is rotated to press the receiving claw piece 16a to firmly grip the rod 3A and rotate the tubular body gripping divided pieces 15 and 16 in the counterclockwise direction. By repeating the expansion and contraction operation of the cylinder 12 within the range of the stroke L _1, the rod 3A is continuously moved in a fixed direction (tightened or loosened).
Can be rotated.

By the way, in the case of a drill head type boring machine or the like, a fixed clamp on the guide cell is also used to rotate the pipe body on one side with the link type rotary wrench while fixing the pipe body. It is also possible to connect and disconnect them, but by using the link type fixed clamp, the tube body on one side can be easily fixed so as not to rotate.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. A case where the device of the present invention is applied to a boring machine having vertical holes will be described with reference to FIGS. 1 is a side view of a tubular body attaching / detaching device according to the present invention in a state of being attached to a rod 3, FIG. 2 is an enlarged view of part A of FIG. 1, and FIG. 3 is a plan view of a link hydraulic rotary wrench 1. ,
FIG. 4 is a plan view of the link type hydraulic fixed clamp 2.

In FIG. 1, the boring machine has a drill head 6 mounted on a guide cell 5, and the rod 3 set on the guide cell 5 is grounded by the rotation / feeding force of the drill head 6. Penetrate.

Link type hydraulic rotary wrench 1 according to the present invention
As will be shown in detail in FIG. 2, the link type hydraulic fixed clamp 2 (hereinafter, simply referred to as a rotary wrench) and the link type hydraulic fixed clamp 2 (hereinafter, simply referred to as a fixed clamp) have already penetrated into the ground at the lower end side of the rod 3. The fixed clamp 2 is attached to the rear end of the existing rod 3B, and the rotary wrench 1 is attached to the tip of the new rod 3A.

First, the rotary wrench 1 will be described with reference to FIG. 3. The rotary wrench 1 is hydraulically moved by a support shaft 10 to one end of a base plate 11 which is a fixed member fixed to the guide cell 5. A stopper 13 fixed to the cylinder is supported to rotatably hold the hydraulic cylinder 12, and one end of a lock connecting member 14 is attached to a shaft 19 at the tip of a piston 12a of the hydraulic cylinder 12.
Rotatably supported by the lock connecting member 14
With respect to the other end of the tubular body holding split piece 15, one end of the tubular body holding split piece 15 is rotatably supported by a shaft 18, and the other end side of the tubular body holding split piece 15 is further supported by a shaft 17 by the tubular body holding split piece. One end of 16 is rotatably supported.

It is to be noted that, here, only the hydraulic cylinder 12 is connected to the base plate 11, and the shafts 18 and 17 for connecting the other lock connecting member 14 and the pipe body holding divided pieces 15 and 16 to each other. With respect to, the base plate 11 is not connected, and the lock connecting member 14 and the tubular body holding split piece 1
5 and 16 are only placed on the base plate 11.

The base plate 11 is a reaction force member when the rod 3 is rotated because the penetrating portion of the rod 3 is cut out in a U shape. The member to which the cylinder 12 is connected is not limited to the base plate 11 but may be the cylinder 1
It suffices that the position of the shaft 10 is immovable so that torque can be applied to the pipe gripping divided pieces 15 and 16 by the extension of 2.

The pipe gripping divided pieces 15 and 16 are
It is a half-arched member, and detachable piece members 15A and 16A are attached to the inside thereof, and can be replaced according to the size diameter of the rod to be gripped. One half of the rod 3A is surrounded by the pipe gripping split piece 15 and the other half of the rod 3A is surrounded by the pipe gripping split piece 16, and the lock receiving claw piece 16a on the other end side of the pipe gripping split piece 16 is formed. Lock claw piece 1 formed on the other end of the lock connecting member 16
By being pressed by 6a, it is firmly gripped by the tubular body gripping divided pieces 15 and 16 which are in contact with substantially the entire circumference of the rod 3A.

Next, the fixed clamp 3 will be described in detail with reference to FIG. 4. The fixed clamp 2 is attached to the tip of a cylinder connecting piece 21B which extends outwardly from one end of the tubular body gripping divided piece 21. The hydraulic cylinder 25 is rotatably connected by the shaft 26, and the lock connecting member 24 is rotatably connected by the shaft 27 to the tip end of the piston 25a of the hydraulic cylinder 25. The end side is rotatably connected to the vicinity of the base of the cylinder connecting piece 21B by a shaft 28.

On the other hand, on the other end side of the tubular body gripping divided piece 21,
The tubular body holding split piece 22 is rotatably connected by a shaft 23, and the rod 3B is held by the tubular body holding split piece 21. In the grip tightening mechanism, as in the case of the rotary wrench 1, the lock receiving pawl piece 22a formed on the other end side of the tubular body grip dividing piece 16 is formed on the other end side of the lock connecting member 24. By being pressed by the lock claw pieces 24a, the rod 3B is firmly held by the tubular body holding split pieces 15, 16. Further, a rotation stopping piece 21C is formed so as to project from a side portion of the tubular body gripping divided piece 15 and abuts against a stopper 20A formed integrally with the base plate 20 to prevent rotation of the rod 3B. It is like this.

In relation to the base plate 20, the fixed clamp 2 consisting of the hydraulic cylinder 25, the lock connecting member 24, and the pipe gripping divided pieces 21 and 22 is basically placed on the base plate 20. Only the base plate 20
Above, it tries to rotate following the rotation of the rod 3B. However, there is a relationship in which the rotation stopping piece 21C of the tubular body holding division piece 15 collides with the stopper 20A fixedly provided on the base plate 20 to prevent the rotation of the rod 3B. Therefore, the stopper 20A does not have to be fixed to the base plate 20, but may be fixed to a part of the boring machine or the like.

The procedure for separating the rods 3A and 3B using the rotary wrench 1 and the fixed clamp 2 will be described below. First, on the rotary wrench 1 side, as shown in FIG. 5 (A), in order to grip the lower end of the rod 3A, the tubular body holding split piece 15 is rotated and the rod 3A and the rod 3A are held together. Hydraulic cylinder 12 after surrounding
The lock claw piece 14a of the lock connecting member 14
The lock receiving claw piece 1 on the tip side of the tubular body gripping split piece 16
6a is pressed and the rod 3A is firmly gripped.

On the other hand, on the fixed clamp 2 side, as shown in FIG.
As shown in (A), in order to grip the upper end of the rod 3B, the tubular body holding split piece 22 is rotated to rotate the tubular body holding split piece 2.
After enclosing the rod 3B with 1, the hydraulic cylinder 25 is extended, and the lock receiving pawl piece 22 on the tip end side of the tubular body holding split piece 22 is extended by the lock pawl piece 24a of the lock connecting member 24.
Press a and hold the rod 3B firmly.

Next, the hydraulic cylinder 1 of the rotary wrench 1.
When 2 is further extended, as shown in FIG. 5 (C), the entire tubular body holding divided pieces 15 and 16 holding the rod 3A rotate in the arrow direction to rotate the rod 3A. On the other hand, on the fixed clamp side, the fixed clamp 2 held on the rod 3B also tries to rotate in the same direction as the rod 3A rotated by the rotary wrench 1, but is fixed to the base plate 20. The rotation stopping piece 21C of the tubular body holding split piece 15 collides with the stopper 20A to prevent the fixed clamp 3 from rotating. When the rotary wrench 1 continues to rotate, the rotation of the rod 3B is blocked, so that only the rod 3A is rotated in the loosening direction.

After that, when the hydraulic cylinder 12 is contracted from the fully extended state, as shown in FIG.
Since the position of the shaft 18 is above the line O connecting the rod 9 and the rod core, the shaft 19 of the pulling force P by the hydraulic cylinder 12 is
With the component force P _{f in the} direction of the straight line R connecting the shaft 18 and the shaft 18, the tubular body gripping split pieces 15 and 16 are rotated in the clockwise direction without releasing the lock claw pieces 14a of the lock connecting member 14. At this time, the gripping force of the rod 3A by the pipe gripping divided pieces 15, 16 is slightly weakened, so that only the pipe gripping divided pieces 15, 16 are rotated without co-rotating the rod 3A. After that, when the stroke of the cylinder 12 reaches L ₁ (line S), the pawl piece 14a of the locking connecting member 14 is released, but the stroke is stopped here, and then the hydraulic cylinder 12 is turned on again. When extended, the claw pieces 14a of the locking connecting member 14 press the receiving claw pieces 16a of the tubular body gripping split piece 16 to firmly grip the rod 3A, and the tubular body gripping split pieces 15, 16 are rotated counterclockwise. The rod 3A is rotated counterclockwise in order to rotate the rod 3A. In this way, the rod 3A is continuously rotated in the loosening direction by repeating the expansion / contraction operation of the cylinder 12 within the range of the stroke L ₁ .

Here, as shown by the chain line, a protruding piece 16B is formed from the center of rotation of the tubular body gripping divided piece 16, and the protrusion 11a fixed to the base plate 11 is connected by a pushing spring 30. As a result, during the pulling stroke, even if the stroke is shortened beyond the line S in which the claw piece 14a of the locking connecting member 14 moves to be released, the pushing spring 3
Since 0 prevents the tubular body gripping split piece 16 from opening, it can be contracted to the position of the stroke L ₂ .
That is, since the amount of rotation of the rod 3A can be increased by one cylinder expansion / contraction operation, the overall work time can be shortened.

Next, another embodiment of the present invention will be described. The rotary wrench according to the present invention shown in FIG. 8 has the same rotation mechanism as the rotary wrench 1 according to the first embodiment of FIG. 2, but the tubular body holding split piece for holding the rod 3A is a three-piece split piece. The difference is that. That is, the first tubular body gripping split piece 30 is rotatably supported by the shaft 18 with respect to the lock connecting member 14, and the first tubular body gripping split piece 30 is axially supported by the shaft 33 on the other end side. A two-pipe body gripping division piece 31 is rotatably supported, and a third pipe body grasping division piece 32 is rotatably connected to the other end side of the second pipe body grasping division piece 31 by a shaft 34. Has been done. A lock receiving claw piece 32a formed on the other end side of the third tubular body holding divided piece 32
Is pressed by the lock claw piece 14a of the lock connecting member 14, so that the rod 3A is firmly gripped. In this way, by increasing the number of divided pieces that hold the rod 3A, the pressing force acting on the rod 3 can be dispersed and evenly applied even when the rod diameter becomes large. Therefore, it is possible to prevent a recess or the like from occurring in the rod 3A.

On the other hand, when connecting and disconnecting the rod 3, preferably, as shown in FIG. 9, the rods 34A, 3 of the rotary wrench 1 side and the fixed clamp 2 side, respectively.
It is desirable to dispose the misalignment preventing clamps 7, 7 with respect to B.

The rotary wrench 1 applies torque to the rod 3A and tightens or loosens it, but it does not apply torque by fixing the position of the rod 3A itself, and the fixed clamp 2 also applies torque to the rod 3B. Since the position of the rod 3B itself is not fixed only by fixing the rod 3B so as to hug it, when a torque is applied by the rotary wrench 12, the center lines of the rod 3A and the rod 3B are misaligned. Try to. Then, the applied torque is converted into the frictional force of the threaded screw portion, and a torque more than the torque required for joining / separating is required. However, as described above, by providing the misalignment preventing clamps 7 and 7, Misalignment between the rods 3A and 3B is prevented, and joining / separation work is facilitated.

The misalignment preventing clamp 7 is, as shown in detail in FIG. 10, formed by a shaft 42 at one end of an undivided gripping member 40 fixed to the guide cell 5 side, and the other gripping member 41. Is rotatably attached, and is rotatably attached to the other end of the grip member 40.
3 is locked to one end of the grip member 41, and the nuts 44 are tightened to firmly grip the rods 3A and 3B. Note that 40A and 40B are bridge members that are exchanged according to the rod size.

By the way, when the rod 3 is connected or disconnected, the rotation directions of the rods are opposite to each other. In that case, the rotary wrench 1 is used upside down, or the connecting rotation is performed. This can be dealt with by preparing both a wrench and a rotary wrench for disconnection.

In this embodiment, the boring rod is taken as an example and the connection and disconnection thereof have been described. However, for other works that require connection between pipes, for example, connection of a buried pipe, etc. However, it can be applied.

[0036]

As described above in detail, according to the present invention, it is easy to set the pipe body, and it is possible to work smoothly even in a compact and narrow working space, and further to connect / disconnect the rods. Can be efficiently performed in a short time.

[Brief description of drawings]

FIG. 1 is a side view showing a state where a tubular body attaching / detaching device according to the present invention is attached to a rod.

FIG. 2 is an enlarged view of part A in FIG.

FIG. 3 is a plan view of a rotary wrench.

FIG. 4 is a plan view of a fixed clamp.

5A to 5C are operation sequence diagrams of the rotary wrench.

6A to 6C are operation sequence diagrams of a fixed clamp.

FIG. 7 is an explanatory diagram of a continuous rotation action of the rotary wrench.

FIG. 8 is a plan view showing another example of the rotary wrench.

FIG. 9 is a view showing a usage state of the misalignment prevention clamp.

FIG. 10 is a plan view of a misalignment prevention clamp.

[Explanation of symbols]

1 ... Rotating wrench, 2 ... Fixed clamp, 3 ... Rod, 11
・ 20 ... Base plate, 12 ・ 25 ... Hydraulic cylinder, 14
・ 24 ... Locking connection member, 15,16,21,22 ...
Pipe gripping split piece, 20A ... Stopper

Claims (3)

[Claims] 1. A cylinder is rotatably attached to one end of a fixing member, a lock connecting member is rotatably attached to a piston portion of the cylinder, and an inner peripheral surface is attached to the other end of the lock connecting member. At least two pipe-holding divided pieces each having an arcuate recess formed along the pipe shape are rotatably connected to each other, and the pipe body is surrounded by the pipe-holding divided piece group. By the extension operation, the lock receiving claw piece formed at the tip of the pipe gripping divided piece on the most end side is pressed and supported by the lock claw piece formed on the other end side of the locking connecting member, A tube attachment / detachment device comprising a link-type rotary wrench, which grips a tubular body contained in a body-gripping divided piece group and rotates the grasped tubular body around an axis. 2. A shaft connecting the lock connecting member and the pipe gripping divided piece more than a line connecting the shaft connecting the piston and the lock connecting member to the center of the pipe in the most extended state of the cylinder. The pipe attachment / detachment device comprising the link type rotary wrench according to claim 1, wherein is attached to the cylinder. 3. A tubular body gripping segmented piece having an arcuate concave portion formed along the tubular body shape on the inner peripheral surface thereof so as to be rotatably connected in at least two or more rows. , A cylinder is rotatably supported by a protruding extension piece formed at one end side thereof, and a lock connecting member is rotatably attached to a piston portion of the cylinder, and the lock connecting member is The other end side is rotatably rotatably supported by the base end portion of the projecting extension portion, and the extension operation of the cylinder from the state in which the pipe body is surrounded by the pipe body holding divided piece group, the lock connecting member A tube body that is supported by the lock claw piece formed on the other end side to press and support the lock receiving claw piece formed on the tip of the tubular body holding split piece on the other end side, and is included in the tubular body holding split piece group. While holding the A pipe body comprising a combination of a link type fixed clamp that integrally rotates and blocks rotation of the pipe body by colliding with a stopper member that is separately disposed in close proximity, and a link type rotary wrench according to claim 1. Detachable device.