JPH0742875A - Pipe connecting device - Google Patents

Abstract

PURPOSE:To facilitate the work of connecting pipes together by providing a saddle member which is freely fitted to and removed from the neck of a socket at a pipe end portion and a connection means which is driven and contracted to close a clamp lever to press a working end into contact with the outer peripheral surface of a spigot. CONSTITUTION:To connect a new pipe 4 to an existing pipe 3, the spigot 6 of the new pipe 4 hoisted by a crane and the like is disposed coaxial with the socket 5 of the existing pipe 3. A saddle member 7, a spigot holding member 8 and a connecting cylinder unit 9 are hoisted from the ground and the saddle member 7 is fitted to the neck 5a of the socket 5 and the spigot holding member 8 is fitted around the outer peripheral portion of the spigot 6. Next, the cylinder unit 9 is contracted and links arms 15c, 15d are rotated in C direction to close a clamp lever so as to secure the spigot holding member 8 to the outer peripheral portion of the spigot 6. Under these conditions, the cylinder unit 9 is further contracted to move the new pipe 4 toward the existing pipe 3 to insert the spigot 6 into the socket 5, thus completing connection of the pipes 3, 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joining device for joining pipes laid in grooves cut from the surface of the earth.

[0002]

2. Description of the Related Art Conventionally, when laying a pipeline in a groove cut from the surface of the earth, an operator enters the groove, puts a wire rope on both pipes to be joined, and uses a lever block or the like to wire this wire. In many cases, a rope is operated to pull both pipes together for joining work.

[0003]

However, the work in the conventional open-cut groove is accompanied by a risk of collapsing the groove, the working environment is extremely bad, and the work is often skillful.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a pipe joining apparatus which enables the joining work to be performed easily from the ground surface outside the open-cut groove even by an unskilled person.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is a pipe joining apparatus for joining pipes laid in grooves cut from the ground surface, which are joined together. A saddle member that can be inserted into and removed from the neck portion of the receiving port formed at the end of the pipe from above, and is prevented from coming off from the receiving port side.
A pair of clamp levers that can be freely inserted into and removed from the outer peripheral portion of the insertion opening formed at the end of the other pipe to be joined and whose working end can contact the outer peripheral portion of the insertion opening, and these clamp levers are opened and closed. An insertion opening holding member provided with a toggle link mechanism, one end of which is connected to the saddle member and the other end of which is connected to a connecting point of the toggle link mechanism, and clamp levers are respectively connected via the toggle link mechanism during contraction driving. It is constituted by a holding and joining means for moving it closed.

[0006]

In the above structure, the saddle member is fitted to the neck portion of the receiving port of one pipe from above with respect to the pipes arranged so as to face each other on the same axis, and the outer periphery of the insertion port of the other pipe is fitted. The insertion port holding member is fitted into the portion from above. Then, the holding and joining means is driven to contract to move the connecting point of the toggle link mechanism, thereby closing the clamp lever via the two action points of the toggle link mechanism, and the action end of the clamp lever to the outer periphery of the insertion opening. Press against each surface. As a result, the insertion port holding member is fixed to the outer peripheral portion of the insertion port, and the holding and joining means is contractively driven to move the insertion port of the other tube to the receiving port side through the insertion port holding member. The mouth can be inserted into the mouthpiece.

Therefore, the joining operation can be performed between the pipes by operating the joining device from the outside of the open-cut groove, and the joining operation can be easily performed even by an unskilled person. Moreover, since the holding / joining means can hold the insertion opening and move and insert the tube, the apparatus itself can be simplified and reduced in weight, and can be easily transported and handled.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the pipe joining apparatus according to the present invention will be described below with reference to the drawings. In FIG. 5, reference numeral 1 denotes an excavation groove formed to a predetermined depth from the ground surface 2, and a pipe 3 has already been laid inside the excavation groove 1, and the next new pipe 4 is joined to the existing pipe 3. The existing pipe 3 is buried in the open-cut groove 1 so that the receiving port 5 at one end is exposed, and the receiving port 5 is joined to the insertion port 6 of the new pipe 4. A saddle member 7 is held on the neck portion 5a of the receiving opening 5, and an insertion opening holding member 8 is held on the outer peripheral portion of the insertion opening 6. A pair of saddle members 7 and 8 are provided between the saddle member 7 and the insertion opening holding member 8. A hydraulic holding and joining cylinder device (holding and joining means) 9 is connected.

As shown in FIGS. 1 to 3, the insertion port holding member 8
Is a seating body 11 which can be freely inserted into and removed from the upper half of the outer peripheral portion of the insertion opening 6 of the new pipe 4, and lever support pins 12 parallel to the pipe axis O of the new pipe 4 at both ends of the seating body 11. A pair of left and right clamp levers 13 whose intermediate portions are openably and closably supported via
The two action points 15a are respectively connected to the upper end portion (passive end) of the clamp lever 13 and a toggle link mechanism 15 capable of opening and closing the clamp lever 14. Further, the seating body 11 is provided with seating members 16 that come into contact with the outer peripheral surface of the insertion opening 6 at, for example, two places.
6 can prevent the insertion opening holding member 8 from sliding due to a frictional force due to its own weight when the holding and joining cylinder device 9 is activated.

Both of the clamp levers 14 are formed in a symmetrical V-shape when viewed from the front, and the pressure contact member 13 attached to the lower end portion (working end) is pressed against the outer peripheral surface of the insertion opening 6 when it is closed. The insertion port holding member 8 can be fixed to the outer peripheral portion of the insertion port 6. Further, the toggle link mechanism 15 that opens and closes the clamp lever 14 is a connecting point 15b to which the piston rod 9a of the holding and joining cylinder device 9 is connected via a horizontal connecting member 17, and is rotated via a connecting pin 18 in the vertical direction. A pair of left and right link arms 15c and 15 movably connected
d is provided. And the link arms 15c, 1
Vertical connecting members 20 are attached to the front end portions of 5d via vertical pins 19, respectively, and are clamped in elongated holes 20a formed in the lower portion of these connecting members 20 in the vertical direction via slide pins 21 in the tube axis direction. The upper end of the lever 14 is connected.

Therefore, the holding and joining cylinder device 9
By moving the connecting pin 18 in the axial direction indicated by the arrows A and B, the connecting pin 18 is moved between the open position indicated by a virtual line and the clamp position indicated by a solid line as shown in FIGS. 1 and 2.
By rotating the link arms 15b and 15c in the directions of arrows C and D, the clamp lever 14 can be opened and closed in the directions of arrows E and F, and by further contracting the holding and joining cylinder device 9 from the clamp position, the insertion port is inserted. 6 for saddle member 7
It can be moved to the (receptacle 5 side).

As shown in FIG. 4, the saddle member 7 is formed in a semi-ring shape so that it can be fitted into and removed from the neck portion 5a of the receiving port 5 of the existing pipe 3 from above, and the inner diameter is smaller than the outer diameter of the receiving port 5. In the fitted state, the movement toward the receiving port 5 side (outward in the axial direction) is regulated and prevented from coming off. Both ends of the saddle member 7 are
A cylinder bracket 2 that has a tapered guide surface 22 that guides the fitting to the neck portion 5a on the inner surface, and that supports the main body 9b of the holding and joining cylinder device 9 through a pin.
3 is provided.

When the new pipe 4 is joined to the existing pipe 3 by using the pipe joining device having the above-mentioned structure,
The insertion port 6 of the new pipe 4 suspended by a crane is arranged on the same axis so as to face each other, and the saddle member 7, the insertion port holding member 9, and the holding and joining cylinder device 9 are inserted from the ground surface 2 into the excavation groove 1. Then, the saddle member 7 is fitted to the neck portion 5a of the receiving opening 5 from above, and the insertion opening holding member 9 is fitted to the outer peripheral portion of the insertion opening 6 from above. At this time, the holding and joining cylinder device 9 is in the advanced state, and the clamp lever 14 is in the open position.

Next, the holding and joining cylinder device 9 is contracted to move the connecting pin 16a in the direction of arrow A, the link arms 15c and 15d are rotated in the direction of arrow C, and the clamp lever 14 is closed in the direction of arrow E. Let As a result, the pressure contact member 13 is pressed against the outer peripheral surface of the insertion opening 6 to hold the insertion opening holding member 8
Is fixed to the outer peripheral portion of the insertion slot 6. When the holding and joining cylinder device 9 contracts, the insertion opening holding member 8 is prevented from sliding due to the frictional force of the receiving member 16 due to its own weight.

When a constant tightening force is reached, the holding and joining cylinder device 9 is further contracted so that the new pipe 4 is replaced with the existing pipe 3.
Then, the insertion opening 6 is inserted into the receiving opening 5. Then, when the swallowed amount becomes constant, the holding and joining cylinder device 9
And the joining of the tubes 3 and 4 is completed. In addition,
Necessary members such as a sealing material are previously stored in the receiving port 5.

After the joining is completed, the holding and joining cylinder device 9 is advanced to move the connecting pin 16a in the direction of the arrow B, and the link arms 15c, 15 of the toggle link mechanism 15 are moved.
Rotate d in the direction of arrow D to move the W clamp lever 14 in the direction of arrow F.
Open in the direction. At the same time, the biting of the saddle member 7 is also loosened, and the saddle member 7 and the insertion port holding member 9 are detached from the pipes 3 and 4 together with the holding and joining cylinder device 9 and lifted from the excavation groove 1 and carried out.

According to the above-described embodiment, the joining device can be operated from the outside of the cut groove 1 to perform the joining work between the pipes 3 and 4, and even the unskilled person can easily perform the joining work. . Moreover, by simply driving the pair of holding and joining cylinder devices 9, the toggle link mechanism 15 can be used to fix the outer circumference of the insertion port 6 of the insertion port holding member 9 with a strong clamping force, and the existing pipe 4 can be installed. Since it can be moved to and inserted into the pipe 3, and the pipes 3 and 4 can be joined to each other, the device itself can be simplified as compared with the case where both the clamp device and the joining device are provided in the device. It can be made lighter and can be easily transported and handled.

[0018]

As described above, according to the present invention, a saddle member that can be fitted into and removed from the upper end of a neck portion of a receiving end of a pipe end, and a clamp lever and a toggle link for opening and closing the clamp lever. Since the holding joining means for closing the clamp lever by the contraction drive through the toggle link mechanism to bring the working end into pressure contact with the outer peripheral surface of the insertion opening is provided between the insertion holding members having the mechanism, the holding joining means contracts. By driving
First, the insertion port holding member can be fixed to the outer peripheral portion of the insertion port by the clamp lever, and one tube can be moved to insert and join the insertion port to the receiving port of the other tube.

Therefore, it is possible to perform the joining work between the pipes by operating the joining device from the outside of the digging groove, and the joining work can be easily performed even by an unskilled person. Moreover, since the holding / joining means can hold the insertion opening and move and insert the tube, the device itself can be simplified and reduced in weight, and can be easily transported and handled.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a pipe joining device according to the present invention.

FIG. 2 is a plan view of the pipe joining apparatus.

FIG. 3 is a side view of the pipe joining device.

FIG. 4 is a rear view of the pipe joining device.

FIG. 5 is an overall side view showing a pipe joining operation by the pipe joining device.

[Explanation of symbols]

 1 Cutting groove 2 Ground surface 3 Existing pipe 4 New pipe 5 Receiving port 5a Neck part 6 Inserting port 7 Saddle member 8 Inserting port holding member 9 Holding and joining cylinder device (joint holding means) 11 Seating body 13 Crimping member 14 Clamp lever 15 Toggle link Mechanism 15a Action point 15b Connection point 15c Link arm 15d Link arm 18 Connection pin

Claims (1)

[Claims] 1. A pipe joining device for joining pipes laid in a groove cut from the surface of the earth, wherein a neck of a socket formed at an end of one pipe to be joined is from above. A saddle member that can be freely inserted and removed and is retained on the receiving side, and an outer peripheral portion of an insertion opening formed at the end of the other pipe to be joined can be freely inserted and removed from above, and the working end is A pair of clamp levers that can contact the outer periphery and an insertion opening holding member provided with a toggle link mechanism for opening and closing these clamp levers, one end of which is connected to the saddle member, and the other end of which is connected to the toggle link mechanism. A pipe joining device, which is connected to a point and is configured to include holding and joining means for closing the clamp levers via a toggle link mechanism during contraction driving.