JPH0890444A - Pipe body connecting device - Google Patents

Abstract

PURPOSE: To provide a pipe body connecting device capable of surely further efficiently connecting the fellow pipe units, in the case of providing the pipe unit laid in the ground. CONSTITUTION: After fixing a fixed side clamp A to an already laid pipe body and a moving side clamp B to a pipe body P2, which is to be connected to the pipe unit, interposed by respective both side clamping arms 3, 3, a stop hole 39, drilled in a lower end face of a drawing lever C, is inserted to be locked to a fixed pin 11 protrusively provided in lower end parts of the both side clamping arms 3, 3 in the moving side clamp B. A continuous ratchet tooth 38, formed in a lower end face of the drawing lever C, is locked to a locking pin 8 protrusively provided in both side lower ends of an operating lever 9 pivotally mounted front/rear turnably in the fixed side clamp A. By front/rear direction turning the operating lever 9, the pipe body P2 is pulled to a pipe body side through the right/left drawing lever C, to connect the fellow pipe bodies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting device for connecting pipes such as synthetic resin pipes such as hard vinyl chloride pipes and concrete pipes buried in the ground.

[0002]

2. Description of the Related Art When laying a pipe such as a cable arranging pipe or a water pipe in the ground, the opposite open end of the pipe to be laid next is inserted into the open end of the pipe that has already been laid. Are being connected sequentially. As such a device for connecting pipes, a fixed side clamp to be attached to a pipe already laid conventionally, a moving side clamp to be attached to a pipe to be laid next, and a connection between both clamps. It is known that the movable-side clamp is configured to be attracted to the fixed-side clamp.

There are various structures of the above-mentioned clamp. For example, a screw rod having a lower end provided with a contact piece to be crimped to the upper peripheral surface of the pipe is screwed through the central screw hole portion of the screw rod, and the screw is attached. A lever in which a central portion of a support arm longer than the screw rod is rotatably supported on the lower end of the rod, and a pair of gripping pieces for gripping both side surfaces of the tubular body are attached to the lower ends of the support arm. It is widely used that the intermediate portion of the lever is pivotally attached and the upper end of the lever is pivotally attached to both ends of the threaded rod through a connecting rod.

On the other hand, as the pulling means connecting the two clamps, a rope connected to the fixed side clamp is constructed to be wound up by a winding device provided in the moving side clamp, or a fixed side. There is a structure in which a pulling rod connected to a clamp is pulled by means of a jack or the like.

[0005]

However, the pipe body connecting device as described above has a structure in which both clamps are integrally connected by the pulling means or a structure in which the pulling means is attached to one of the clamps. Therefore, there is a problem that not only is it difficult to carry and other handling but also it takes time and effort to attach the respective clamps to both pipes to be connected even when the pipes are connected.

Further, in order to mount the clamp on the pipe body,
The vertical screw rod is rotated by operating the handle to move the screwing rod downward, and the lowering of the lever causes the lower end of the lever to move through the connecting rod pivotally attached to both ends of the screwing rod. This is done by pivoting inward with the pivot point as the fulcrum and crimping the gripping pieces to both sides of the tube, so the entire clamp rotates together when the screw rod starts rotating. In addition, there is a possibility that it will be difficult to remove the screw rod, and in addition, the amount of lever displacement is small for the amount of rotation of the screw rod, which requires time and effort to attach the clamp to the pipe body, and the work efficiency of pipe laying decreases. There is a problem.

Also, in the case of the clamp pulling means, in the case of a cord, not only a winding device is required but the whole structure is complicated, but also a large-diameter large-diameter pipe is moved in the pipe axial direction. In order to obtain the required large pulling force, a strong winding device must be used, while the pulling means using a jack has a problem of high cost. In addition, the drawing direction of the pipes may act in a direction inclined with respect to the pipe axis, and there is a risk that the work of joining the pipes may not be performed smoothly. It is an object of the present invention to provide a pipe connecting device capable of completely eliminating such problems.

[0008]

In order to achieve the above object, a pipe connecting device of the present invention comprises a fixed side clamp attached to one pipe and a movable side clamp attached to the other pipe.
And a pulling rod that is detachably connected between these clamps, and both of the clamps have a contact piece that is pressed against the upper peripheral surface of the pipe body at the central portion of the support member, and both end portions of the support member. The upper ends of a pair of left and right gripping arms are rotatably pivoted in the left-right direction, and side surface gripping pieces of the pipe body are provided on the surfaces facing the lower ends of these gripping arms. It is configured so as to be able to come into contact with and separate from each other by rotating. Further, a fixing pin is provided to project outward at a portion of the lower end of the left and right gripping arms of the moving side clamp that substantially matches the axial center height of the pipe body, while the lower end of the left and right gripping arms of the fixed side clamp is provided. A lower end of a lever having a handle projecting from the upper end is pivotally attached to the front and rear so as to be rotatable back and forth, and a locking pin is provided at a part of the lower end of the lever substantially corresponding to the axial center height of the pipe body. . Further, the pulling rod is provided with sawtooth ratchet teeth continuous in the length direction from one end side to the other end side at the lower end edge thereof, and at the other end, a locking hole fitted into the fixed pin of the moving side clamp. The ratchet teeth are releasably engaged with the locking pin of the lever of the fixed side clamp.

In the above apparatus for connecting a tubular body, the invention described in claim 2 is such that a screw cylinder member having the tip end portion of the screw rod threaded is attached to one of a pair of left and right gripping arms, and the other screw is attached to the screw cylinder member. A bearing member that rotatably inserts and supports a rod is attached, and the left and right gripping arms are moved toward and away from each other by a turning operation of a handle fixed to the tip of a screw rod, with the pivotal portion of the support member serving as a fulcrum. The invention described in claim 3 is characterized in that the upper end of the central member is rotatably attached to the support member in the vertical direction. The abutment piece is fixed, and the central member is configured to be movable and fixed in the vertical direction by a toggle joint mechanism.

[0010]

The fixed side clamp is attached to the end of the pipe that has already been laid, and the moving side clamp is attached to the opposite end of the pipe to be connected to the pipe. The mounting is performed by placing the left and right gripping arms so as to straddle the pipe body, and abutting pieces hanging from the center of the support member are brought into contact with the upper peripheral surface of the pipe body, and in this state the screw This is performed by rotating the rod to move the left and right gripping arms in the direction of approaching each other, and crimping the gripping pieces provided at the lower ends of these gripping arms to both side surfaces of the pipe body. Next, a locking pin formed at the other end of the pulling rod is inserted into and locked by a fixing pin protruding from the lower end of the gripping arm of the moving side clamp, and one end of the pulling rod is fixed. The fixed side clamp is mounted on a locking pin of a lever which is rotatable back and forth, and ratchet teeth are locked to the locking pin.

In this state, when the lever is reciprocally rotated in the front-rear direction by the operating handle, the locking pin slides on the inclined surface of the ratchet teeth during forward movement and moves in the handle operating direction without locking the ratchet teeth. Then, when the rotation of the lever is stopped, the ratchet teeth at that position are engaged. Then, when the lever is moved back, the state where the locking pin is locked to the ratchet teeth is maintained and the pulling rod moves in the lengthwise direction according to the amount of rotation of the lever. Therefore, the moving side clamp is also integrated. The pipe to be moved and laid is pulled toward the fixed-side pipe.

At this time, since the locking pin is provided at the lower end of the lever slightly above the center of rotation of the lever, and the length of the lever and the operating handle is sufficiently long, the lever is relatively small. Due to the turning force, a large pulling force is generated, and even if the pipe body is heavy, the pipe body can be reliably pulled while rotating the lever back and forth, and the pulling rod is located at the axial center position of the pipe body. , That is,
Since it is provided parallel to the axial center of the pipe body at a height position corresponding to the radius from the lower end of the pipe body, the pipe bodies are accurately and evenly pulled in the length direction, and the pipe bodies are easily and smoothly joined. To be done. Further, since the amount of pulling of the pipe body by one reciprocating rotation operation of the lever is large, the pipe body connecting work can be efficiently performed.

Further, the contact piece to be brought into close contact with the upper peripheral surface of the tubular body is configured to be movable up and down and fixed by a toggle joint mechanism so that the contact piece and the grip piece provided at the lower ends of the left and right gripping arms. The pipe body can be firmly gripped by and the pipe body connection work can be performed reliably and efficiently.

[0014]

Embodiments of the present invention will now be described with reference to the drawings.
1 and 2, the pipe connecting device includes a fixed side clamp A to be mounted on the pipe P1 already laid, a movable side clamp B to be mounted on the pipe P2 to be laid next, and these clamps A, B. It is composed of a pulling rod C made of a long strip metal plate that is detachably connected between the pulling rods C.

The fixed-side clamp A and the movable-side clamp B are a support member 1 having a horizontally long rhombus shape, and upper ends of both ends of the support member 1 are rotatably pivoted in the left-right direction by pins 2 and a lower end thereof. The pair of left and right gripping arms 3 and 3 having gripping pieces 4 mounted on the opposite surfaces and the gripping arms 3 and 3 centered around the pin 2 are connected between the gripping arms 3 and 3 at their intermediate portions. Screw rod 5 that rotates in the direction of approaching and separating
And a contact piece 6 which is vertically provided from the support member 1 and is brought into close contact with the upper peripheral surface of the tubular body.

Further, the fixed side clamp A has a lower end of a lever 9 having an operation handle 7 projecting upward at the upper end and a locking pin 8 projecting outward at the lower end. Is pivotally attached to the lower ends of the left and right gripping arms 3, 3 by a pin 10 so as to be rotatable in the front-rear direction, and fixed to the lower ends of the left and right gripping arms 3, 3 of the moving side clamp B toward the outside. Pins 11 and 11 are projected.

The structure of the clamps A and B will be described in more detail. The support member 1 includes a pair of front and rear support pieces 1a,
1b is integrally fixed by the above-mentioned both ends pins 2 and 2 with a small space, and the left and right gripping arms 3 and 3 have the same shape. The front and rear arm pieces 3a and 3b are connected with a small space. In addition, the outer end portion of the bracket 13 is pivotally attached to the pin 12 connected between the lower end portions of the front and rear arm pieces 3a, 3a so that the bracket 13 can be raised and lowered, and the inner end surface of the bracket 13 is shaped like a dogleg. The gripping piece 4 that has been bent is fixed. The gripping piece 4
An elastic pad 4a such as a rubber plate is fixed to the tubular body gripping surface.

The front and rear arm pieces 3a of the left and right gripping arms 3,
A screw cylinder member 14 is interposed in one of the gripping arms 3 and a bearing member 15 is interposed in the other gripping arm 3 at the upper center of the length direction between the three cylinders 3b.
The bearing member 15 and the bearing member 15 are connected to the front and rear arm pieces 3a and 3b by the pins 16 and 17.
It is rotatably supported by. Further, the screw rod 5 having the circular handle 18 at one end is horizontally inserted into the bearing member 15, and the tip screw portion is screwed into the screw cylinder member 14, and the stopper members 19 are provided on both sides of the bearing member 15. , 20 are provided to prevent the screw rod 5 from moving in the longitudinal direction with respect to the bearing member 15. The gripping arms 3 and 3 are formed in a V shape by bending the lower central portion thereof outward.

Further, in both clamps A and B, the supporting member 1
The abutting piece 6 hanging from the pair of front and rear plate pieces 21a disposed so as to be sandwiched from the front and back of the intermediate portion of the screw rod 5,
It is integrally fixed to the lower end of the central member 21 composed of 21b. The contact piece 6 is bent upward in a mountain shape, and elastic pads 22 such as a rubber plate are fixed to both sides of the lower surface thereof. The front and rear plate pieces 21a, 21b of the central member 21 have a vertically long hole 23 at the upper end thereof, an upper portion in the middle thereof an arcuate horizontally elongated hole 24 curved upward from one side toward the center, and a circular hole at the lower center portion. On the other hand, the support shaft 26 is fixed between the front and rear support pieces 1a and 1b of the support member 1, and the center lower ends of these support pieces 1a and 1b are vertically long. A hole 27 is provided. Then, the support shaft 26 is provided with a vertically long hole 23 of the central member 21.
And the joint shaft 28 is fixedly installed between the circular holes 25, 25 so that the front and rear ends of the joint shaft 28 projecting from the circular holes 25, 25 are elongated holes 27 of the supporting member 1. It is inserted in 27. Therefore, the central member 21 is vertically movable with respect to the support member 1 within the length range of the vertically elongated holes 23 and 27.

Reference numeral 29 denotes a toggle joint mechanism for pushing the central member 21 in the vertical direction. The operating rod 30 is pivotally supported in the middle portion of the support shaft 26 so as to be rotatable left and right, and the upper end is an arcuate laterally long shape of the central member 21. A rotating rod 32 pivotally attached to a joint pin 31 inserted through the hole 24 and having a lower end pivotally attached to the joint shaft 28.
The spring 34 is connected between the joint shaft 28 and the shaft 33 fixed to the upper end of the other side portion of the support member 1 in a tensioned state.

Therefore, when the operating lever portion 30a projecting from the upper end of the operating rod 30 is rotated to one side about the support shaft 26 as shown in FIG. While moving in the direction of the other side along the arc-shaped laterally long hole 24 and the rotating rod 32 rotates in the direction of the other side around the joint shaft 28, the central member 21 integrated with the joint shaft 28 is pushed down, and the support shaft 2
6, the joint pin 31 and the joint shaft 28 are aligned on a vertical line, and the contact piece 6 fixed to the lower end of the central member 21 is fixed at the lowered position, regardless of the tensile force of the spring 34. When the operating rod 30 is rotated in the opposite direction, the joint pin 31 moves to one side, and the force of the spring 34 allows the central member 21 to move upward via the joint shaft 28. As the means for pushing the contact piece 6 downward, a structure in which it is always pushed by a spring without using the toggle joint mechanism 29, or an appropriate means such as pushing it downward by a screw means is adopted. Good.

The lever 9 provided on the fixed side clamp A side is composed of a pair of left and right lever pieces 9a and 9b, and a placket 9c protruding from the upper end facing surfaces of these lever pieces 9a and 9b.
9c is inserted into the lower end of the operation handle 7 and is pivotally attached to the left and right by a fixed pivot 35, and the lever pieces 9a and 9b are slanted outward from the pivot 35 while being locked downward. Bend the lower part of them vertically and
A pin 10 pivotally attaches to a connecting piece 36, which is fixed to the lower ends of the left and right gripping arms 3 and 3 and protrudes rearward, so as to be rotatable in the front-rear direction. Therefore, the left and right gripping arms 3, 3 are
As the diameter of P1 and P2 expands and contracts inward and outward, the lever pieces 9a and 9b of the lever 9 also expand and contract around the pivot 35 in synchronization therewith.

A block fixed between the locking pin 9 protruding from the lower end of the lever 9 of the fixed clamp A and the arm pieces 3a and 3b of the left and right gripping arms 3 and 3 of the movable clamp B. The fixing pin 11 projecting from the piece 37 is the axial center position of the pipes P1 and P2 when the clamps A and B are attached to the pipes P1 and P2, that is, the lower end of the pipe. It is arranged so as to come to a height position corresponding to the radius.

The long pulling rod C connected between the locking pin 9 and the fixed pin 11 facing the front and rear of the clamps A and B has a lower end edge from one end (rear end) side to the other end side. Saw-toothed ratchet teeth 38 that are continuous in the length direction are formed, and a locking hole 39 that can be inserted into and removed from the fixing pin 11 is provided at the other end. As shown in FIG. 2, each ratchet tooth 38 has an arcuate or vertical locking edge 38a for locking the locking pin 9 and an obliquely downward tilt from the upper end of the locking edge 38a. It is formed in a shape having an inclined edge 38b for guiding the pin 9 downward.

In order to lay a pipe body in a groove excavated in the ground by using the clamps A and B and the pulling rod C configured as described above, first, the socket portion of the pipe body P1 already laid is The pipe body P2 to be laid next to S is installed so as to face the pipe body P1 in series so as to be in series. And the pipe body P1
The fixed-side clamp A and the movable-side clamp B are attached to opposite ends of the pipe body P2 and the pipe body P2, respectively.

In order to mount these clamps A and B on the pipes P1 and P2, first, the left and right gripping arms 3 and 3 are mounted so as to straddle the pipes and attached to the support member 1. The contact piece 6 fixed to the lower end of the central member 21 is brought into contact with the center of the upper peripheral portion of the tubular body, and then the screw bar 5 is advanced to move the left and right gripping arms 3 and 3 around the pins 2 and 2. The gripping pieces 4, 4 attached to the lower end facing surfaces of the gripping pieces 4 and 4 are rotated in a direction in which they approach each other.
Abut the lower part of both side surfaces of the tubular body. Further, the actuating pipe 30 of the toggle joint mechanism 20 is turned to one side to turn the turning rod.
The central member 21 is moved downward via 32, the contact piece is firmly pressed against the upper peripheral surface of the tubular body, and the screw rod 5 is further advanced to lower end gripping pieces 4 of the left and right gripping arms 3, 3. Firmly crimp 4 onto the lower parts of both sides of the tube.

In this way, when the fixed side clamp A is attached to one pipe body P1 and the moving side clamp B is attached to the other pipe body P2, the gripping pieces 4, 4 are located on the lower portions of both side surfaces of the pipe body, that is, of the pipe. The holding pin 8 of the fixed side clamp A and the fixed pin of the moving side clamp, which are provided slightly above the pivotal pin 12 of the gripping pieces 4 and 4 by sandwiching the lower part from the axial height. 11 is located approximately at the axial center of the pipe.

Next, both-side fixing pins of the moving-side clamp B
The engaging holes 39 of the pulling rods C and C are inserted into the locking rods 11 and 11, respectively, and these pulling rods C are extended in parallel to the fixed-side clamp A side. Pin 8,
The ratchet teeth 38 are engaged with the locking pin 8 so that the end portion of the pulling rod C is dropped onto the rail 8. When the lever 9 is reciprocally rotated in the front-rear direction by the operation handle 7 in this state, the locking pin 8 does not engage with the ratchet tooth 38 while slidingly contacting the slanted edge 38b of the ratchet tooth 38 during forward movement. When the lever 9 is moved in the handle operating direction and the rotation of the lever 9 is stopped, the ratchet teeth 38 at that position are engaged.

When the lever 9 is moved back from this state, the locking pin 8 is locked to the locking edge 38a of the ratchet tooth 38, and the pulling rods C, C are pulled in accordance with the amount of rotation of the lever 9.
Moves backward in the length direction, and the moving side clamp B is connected via the moving side clamp B connected via the pulling rods C, C.
The pipe body P2 having the fixed side clamp A attached thereto is drawn toward the pipe body P1 having the fixed side clamp A attached thereto.

At this time, the locking pin 8 is provided on the lower end of the lever 9 slightly above the center of rotation of the lever 9 and the lengths of the lever 9 and the operating handle 7 are sufficiently long. A relatively large lever pulling force can be generated by a relatively small lever turning force, and even a heavy-weight tube body can be reliably pulled by rotating the lever 9 reciprocally. Furthermore, since the pulling rod C is provided parallel to the axial center of the tubular body at the axial center height position of the tubular body, the tubular body can be pulled accurately and uniformly in the longitudinal direction. When the pulling of the pipe body by the reciprocating rotation of the lever 9 is repeated, the moving side pipe body P2 is inserted into the socket opening of the socket portion S of the fixed side pipe body P1.
The opposite end portions of are fitted to each other to complete the connection of both pipes P1 and P2.

[0031]

As described above, according to the pipe connecting device of the present invention, the fixed side clamp mounted on one pipe body and the movable side clamp mounted on the other pipe body, Since it is composed of a pulling rod that is detachably connected between these clamps, each can be handled as a separate body and is easy to handle when transporting or laying pipes. Even when the clamps are attached to the pipe body, both clamps can be attached individually, so that even one worker can perform the attachment work efficiently.

Further, in the fixed side clamp and the movable side clamp, an abutting piece which is brought into pressure contact with the upper peripheral surface of the tubular body is vertically provided at a central portion of the supporting member, and a pair of left and right gripping arms are provided at both ends of the supporting member. The upper ends of the gripping arms are rotatably pivoted in the left-right direction, and the side gripping pieces of the tubular body are provided on the lower end facing surfaces of these gripping arms, and the left and right gripping arms are brought into contact with and separated from each other by the rotation of the screw rod. Since it is freely configured, it has the same structure as that of the first embodiment, and not only the manufacturing is easy, but also the mounting operation to the pipe body can be easily performed by the same operation.

Further, a screw cylinder member having the distal end portion of the screw rod threaded is attached to one of the pair of right and left gripping arms, and a bearing member rotatably inserted and supported by the screw rod is attached to the other. Since the left and right gripping arms are rotated toward and away from each other by the pivotal operation of the handle fixed to the tip of the screw rod, the pivotal mounting portion of the support member is used as a fulcrum to rotate the arm. It is arranged in a horizontal state between the left and right gripping arms by eliminating the inconvenience of co-rotating the clamp due to the rotation of the vertical screw rod and indirectly transmitting the clamping force from the screw rod through a member such as a lever. The right and left gripping arms can be directly and strongly exerted with a pinching force by rotating the screw rod.

Further, a fixing pin is provided so as to project outward at a portion of the lower end portion of the left and right gripping arms of the moving side clamp that substantially matches the axial center height of the pipe body, while the left and right gripping of the fixed side clamp is carried out. The lower end of a lever having a handle protruding from the lower end of the arm is pivotally attached to the lower end of the lever so as to be rotatable back and forth, and a locking pin is provided at a portion of the lower end of the lever substantially corresponding to the axial center height of the pipe body. However, since the pulling rod is provided with a locking hole to be fitted to the fixed pin and ratchet teeth to be engaged with the locking pin, the distance between the moving side clamp and the fixed side clamp mounted on the pipe body may be slightly different. Even if the size is large or small, the pulling rod can be easily and surely attached and the pulling rod is provided at a height position parallel to the axial center of the pipe body.
By rotating the lever, the pipes can be accurately and evenly pulled in the horizontal direction, and the connecting work between the pipes can be performed smoothly and efficiently.

[Brief description of drawings]

FIG. 1 is a simplified perspective view showing a state in which the pipes are used for connection.

FIG. 2 is a side view of both clamps,

FIG. 3 is a vertical sectional front view of a clamp,

FIG. 4 is a front view of a fixed side clamp.

[Explanation of symbols]

 A Fixed side clamp B Moving side clamp P1, P2 Tubular body C Pulling rod 1 Supporting member 3 Grasping arm 4 Grasping piece 5 Screw rod 6 Abutment piece 7 Operating handle 8 Locking pin 9 Lever 11 Fixing pin 29 Toggle joint mechanism 38 Ratchet teeth 39 Locking hole

Claims (3)

[Claims] 1. A fixed side clamp attached to one pipe body and a movable side clamp attached to the other pipe body are provided by vertically arranging an abutting piece for press-contacting an upper peripheral surface of the pipe body at a central portion of a support member. At the same time, the upper ends of a pair of left and right gripping arms are rotatably pivoted in the left-right direction on both side ends of the support member, and side surface gripping pieces of the pipe body are provided on the lower end facing surfaces of these gripping arms. The left and right gripping arms are configured so that they can be brought into and out of contact with each other by the rotation of the screw rod, and are directed outward to the portion of the lower end of the left and right gripping arms of the moving side clamp that approximately matches the axial center height of the pipe body. While the fixing pin is projectingly provided, the lower end of the lever having the handle projecting at the upper end is pivotally attached to the lower end of the left and right gripping arms of the fixed side clamp so as to be rotatable back and forth, and the pipe body at the lower end of the lever is attached. A locking pin is provided so as to project at a portion that approximately matches the height of the shaft center. Further, a lock which is fitted to a fixed pin of the moving side clamp at the other end of a long tube pulling rod provided with sawtooth ratchet teeth continuous in the length direction from one end side to the other end side at the lower end edge. An apparatus for connecting a pipe body, which is provided with a hole and is configured to engage a ratchet tooth with a locking pin of the lever of a fixed side clamp in a disengageable manner. 2. A screw cylinder member having the tip end of the screw rod threaded is attached to one of the pair of left and right gripping arms, and a bearing member rotatably inserted and supported by the screw rod is attached to the other. The pipe according to claim 1, wherein the left and right gripping arms are rotated in directions of moving toward and away from each other by using a pivotally attached portion of the support member as a fulcrum by rotating a handle fixed to the tip of the screw rod. Device for body connection. 3. The abutment piece is fixed to a lower end of a central member whose upper end is pivotally attached to the support member so as to be vertically movable, and the central member is vertically moved and fixed by a toggle joint mechanism. The pipe connecting device according to claim 1 or 2, which is configured to be possible.