JPH0634074A - Pipe body connecting device - Google Patents

Abstract

PURPOSE:To provide a simple structural and easily operable pipe body connecting device by which the possibility that a pipe body is damaged or the pipe body cannot be moved accurately in a connecting direction is not caused in the pipe body connecting device used to connect waveform pipes to each other. CONSTITUTION:When the other pipe body 2 is connected to an existing pipe body 1, a locking claw 14 is embedded/inserted between ribs 15 and 15 of the pipe body 1 from above. Next, locking pieces 9 and 9 of embracing and holding rods 7 and 7 are embedded/inserted between ribs 10 and 10 of the pipe body 2 from both sides, and one ends of towing tools 17 and 17 are locked on locking rings of the embracing and holding rods 7 and 7, and the other ends are introduced integrally in a guide hole 6 of a basic rod 5, and are locked further on a locking ring arranged on the lower end of an operation rod 11. When the operation rod 11 is rotated in a connecting direction, the embracing and holding rods 7 and 7 are attracted to each other, and locking pieces 9 and 9 embrace the pipe body 2, and when it is rotated further, the pipe body 2 is moved in the connecting direction in a condition of being gripped by means of the embracing and holding rods 7, and is conncted to the pipe body 1.

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 suitable for connecting corrugated pipes made of metal, synthetic resin or other material.

[0002]

2. Description of the Related Art Conventionally, corrugated pipes having corrugated irregularities on the outer surface of the pipe body have been used for electric wire pipes, water supply and drainage pipes, etc. in order to impart flatness, flexibility and other characteristics to the pipe body. It is used. The same method as that for connecting general pipes is adopted for connecting such corrugated pipes. For example, one is a method that has been widely used since ancient times, in which one tube that has already been piped is inserted into the other while moving the other tube using a lever. Is the way.

Further, recently, as described in JP-A-4-4381, a chain is wound around and fixed in the vicinity of the connecting portion of both pipes to be connected,
A tractor with a handle is placed between both chains, and the holding rod is used to fix the chain on one of the existing pipes and the traction machine, and to hold the other pipe to be connected. There has been proposed a pipe connector in which a rod is connected to each other by a chain or the like and the operating rod of the traction machine is tilted to the other pipe side to pull the other pipe body toward the one pipe side.

[0004]

However, among these conventional techniques, the method of using the lever operates the lever because an excessive force may be applied to the portion of the pipe body where the lever is contacted and damaged. At this time, it is unavoidable that the connection part of the pipe body floats up, and the tip of the lever will sink into the soil, and the distance from the connection part of the pipe body to the position where the lever hits is relatively long, so the connection There was a problem that it was difficult to move the pipes accurately in the direction, and there were cases where it could not be connected straight because of the disaster.

Further, in the pipe connection machine described in the above publication, the operation of attaching and fixing the chains to both pipes is complicated and time-consuming, and in order to wind the chains, the lower side of both pipes must be attached. When diving, it was necessary to lift the pipe body and dig down the soil surface. Further, in the case of a general pipe, there is no problem, but in the case of a corrugated pipe, there are problems that a chain is fitted between the ribs on the outer peripheral surface of the pipe body to hinder the tightening, or the ribs may be damaged.

The present invention solves the above-mentioned drawbacks of the prior art, does not damage the pipe body or cannot move the pipe body accurately in the connecting direction when connecting the corrugated pipes, and The object of the present invention is to provide a pipe connecting device having a simple structure and easy to operate.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to a "connecting device for pipes used for connecting corrugated pipes, which is arranged horizontally above one pipe to be connected so as to straddle the pipe. An installed base rod, a pair of holding rods that are rotatably connected to both ends of the base rod, and provided with locking pieces that can be fitted between the ribs on the outer peripheral surface of the tubular body at the tip, and an upper portion. Is a gripping rod, and the lower part is bifurcated to form a tow rod. Between both ends of the tow rod, locking claws that can be fitted between the ribs on the outer peripheral surface of the tubular body are provided. The operating rod rotatably connected with the fulcrum as a fulcrum, and a towing tool bridged between the operating rod and the holding rod. The towing tool rotates the operating rod in the connecting direction. The pipe connecting device is characterized in that it is connected so as to close the holding rod by ".

In the connection device of the present invention, the material of the pipe body to be connected is not particularly limited, and examples thereof include metal pipes, synthetic resin pipes, fiber reinforced synthetic resin pipes, concrete pipes and the like, which are flexible and rigid. Either may be used.

As for the shape, the corrugated tube is the target as described above. That is, the outer peripheral surface of the tubular body is provided with independent ribs with a constant pitch at intervals, or the spiral ribs are formed, and the presence or absence of the ribs on the inner surface of the tubular body does not matter. Absent.

The diameter of the pipe to be used by the pipe connecting device of the present invention is not particularly limited, but it is usually less than 300 mm. Therefore, it is necessary to set the materials, dimensions, and the like of the base rod and other members constituting the present device in consideration of factors such as the material, shape, and diameter of these pipes.

The pipe body connecting device of the present invention is used when connecting another pipe body to a pipe body that has already been piped. Usually, this existing pipe is fixed at that position. However, if it is simply installed at the laying place, it is preferable to fix it by some method when using the device.

[0012]

In the pipe connecting device of the present invention, when the corrugated pipe is connected using the pipe, the locking claw of the tow rod is fitted between the ribs on the upper portion of the existing pipe to connect the base rod. This is completed by arranging it horizontally so as to straddle the body, inserting the locking piece of the holding rod between the ribs in the lower part of the tubular body, and bridging the pulling tool.

Therefore, when mounting the device of the present invention,
Since the pipe body is never lifted or moved,
The mounting is easy. In addition, when the operating rod has a gripping portion and is rotated in the connecting direction with the connecting portion with the locking claw as a fulcrum, a force in the connecting direction is applied to the holding rod by the pulling force of the pulling tool. Since the position at the upper end (the connecting portion with the base rod) does not change due to the existence, naturally, in the first stage, it naturally moves in the closing direction together with the locking piece.

Next, in the case where the rib shape is a nearly vertical rib as in the corrugated pipe shown in FIG. 1, the locking piece is completely closed between the ribs and the outer wall between the ribs of the pipe body is With no external force applied, the tube is moved in the connecting direction by hooking the rib.

When the rib has a curved surface such that the ribs are connected by an arc, the locking piece presses the outer wall between the ribs below the tubular body. Then, when the pressing force is gradually increased and a frictional force is exerted to the extent that the pipe body can be sufficiently gripped, the pipe body is locked by the locking piece and moves in the connecting direction.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a drawing showing an embodiment of the present invention together with its use mode, in which FIG. 1 (a) is a front view thereof, FIG. 1 (b) is a right side view thereof, and FIG. )
And (d) are views showing a part of them in an enlarged manner.

In these figures, 1 is a pipe body already laid, 2 is a pipe body to be connected to the pipe body 1 from now, 3
Is a receiving port that serves as a connecting portion of the tubular body 1, and 4 is an outlet that serves as a connecting portion of the tubular body 2.

Reference numeral 5 denotes a base rod, which is formed in a shape in which substantially the center of a straight rod body is projected to one side, and the projecting portion has a short tubular shape, and a guide hole 6 is formed as shown in FIG. It is installed throughout. Numerals 7 and 7 are holding rods attached to both ends of the base rod 5 so that they can be rotated like supporting arms with supporting shafts 8 and 8 as fulcrums. The pieces 9 and 9 are formed, and the locking pieces 9 and 9 are sized so that they can be fitted between the ribs 10 and 10 on the lower outer peripheral surface of the tubular body 2.

Reference numeral 11 denotes an operating rod, the upper part of which is a gripping rod 12 and the lower part is bifurcated to form traction rods 13 and 13. The lower ends of the traction rods 13 and 13 are bent in a dogleg shape. A locking claw 14 is arranged between both ends of the locking claw 14. The locking claws 14 are ribs 15, 15 on the outer peripheral surface of the upper portion of the tubular body 1.
It has a short arc shape that can be inserted between them, and the connecting portion with the tow rod 13 is rotatably connected with the support shaft 16 as a fulcrum, as shown in FIG.

Numerals 17 and 17 are traction tools composed of two wires, one end of each of which is connected to a retaining ring provided in the middle of the holding rods 7 and 7, respectively. )
As shown in FIG. 5, the base rod 5 is integrally pulled up by the guide hole 6 of the projecting portion, and the other end is connected to a locking ring provided at the lower end of the operating rod 11 and stretched. Thus, the tractor 1
7 and 17 are pulled from the holding rods 7 and 7 to the center so that they are operated in a direction to close the holding rods 7 and 7 when the operating rod 11 is rotated in the connecting direction, and are unified just above the connecting direction. Therefore, it is necessary to stretch the operating rod 11.

Next, an explanation will be given of the procedure for connecting pipes by using the connecting device of the present invention having the above-mentioned structure. First, the pipes 1 and 2 are installed at preset laying positions of the pipe body, and the locking claw 14 is inserted from above between the ribs 15 on the upper outer peripheral surface of the pipe body 1 to support the operating rod 11. Hold it or incline it to either one, and on the other hand, insert the retaining pieces 9, 9 of the holding rods 7, 7 from both sides between the ribs 10, 10 on the lower outer peripheral surface of the tubular body 2, and pull it. One end of the tools 17, 17 is locked to the retaining ring of the holding rods 7, 7, and the other end is fixed to the base rod 5.
It is introduced into the guide hole 6 of the operating rod 11 and is unified, and is further connected to a locking ring provided at the lower end of the holding rod 12 of the operating rod 11.

Then, the operating rod 11 is slightly rotated in the connecting direction, and the pulling tools 17, 17 are stretched to complete the preparation. Next, the operating rod 11 is rotated in the connecting direction. Then, the holding rods 7, 7 are connected to the base rod 5 via the pulling tools 17, 17.
While being rotated by the support shafts 8 and 8 at the connecting portion with the, they are attracted to each other to form an inverted V shape. Therefore, the locking piece 9,
The tube 9 is fitted between the ribs 10 and 10 below the tube body 2 so as to be held therein, and the rib 10 is hooked and locked.

When the operating rod 11 continues to rotate, the position of the operating rod 1 does not change because the pipe 1 is an existing pipe, and the operating rod 1 does not move.
1 rotates to the position shown by the phantom line, and the insertion port 4 of the tube body 2 is inserted into the receiving port 3 of the tube body 1.

When the connection is completed, the operating rod 11 is pivoted slightly in the opposite direction to release the tension of the pulling tools 17, 17, so that the pulling tool 17 moves the gripping rod 12 and the holding rod 7. It can be easily disengaged at each locking ring, the pressing force of the locking pieces 9, 9 is released, and it can be removed from the tubular body 2. In addition, the operating rod 11
Can be removed from the tube 1 by lifting it up. If the connection cannot be made completely by one operation, the locking positions of the locking pieces 9, 9 may be changed and the same operation may be repeated.

In the above embodiment, the operating rod 11 is attached to the pipe body 1, and the base rod 5, the holding rod 7 and the like are attached to the pipe body 2, respectively, but the present invention is not limited to this. You may install it conversely.

It is preferable that the thickness (height) of the locking piece 9 used in the device of the present invention is lower than the height of the rib of the target tube, because the resistance of the ground at the time of insertion is reduced. Further, if the curvatures of the locking pieces 9 and the locking claws 14 are matched as much as possible with the curvatures of the outer peripheral surface of the troughs of the pipe body, the contact area with the ribs is widened, and the holding rod 7 and the operating rod 11 are provided. This operation is preferable because local stress hardly occurs on the rib. However, in the case where the same device is applicable to a wide range of pipe diameters, the thickness and width of the locking pieces 9 and the locking claws 14 are set to those of the smallest diameter pipe body among the target pipe bodies. It is preferable that the ribs are adapted to various dimensions and the curvature is matched with the outer circumference of the pipe body having the largest diameter.

In the above-mentioned embodiment, the pulling tool in the present invention is made of a wire. However, as shown in FIG. 2, for example, three pulling tools which rotate around one support shaft 18 are used. A connecting rod 19, which is composed of a pair of discs, is fixed to the upper and lower discs, and has a locking hook (not shown) at its tip.
20, a locking ring 21 provided on the center disk, and a connecting rod 2 having locking hooks at both ends connected to the locking ring 21.
You may use the connection block 23 which consists of 2.

When such a connecting block 23 is used, the guide hole 6 of the base rod 5 in the above embodiment is unnecessary.

[0029]

The pipe connecting device of the present invention has a simple structure, and when the pipe is attached,
Since there is no incidental action such as tightening the screw of the device, the work for mounting can be performed quickly and easily, and the tube body is not damaged.

In addition, after performing the mounting of the device,
Although the action of the force required for this is different between the gripping work of the pipe and the moving work in the connecting direction of the pipe, the force for operating the device is always in one direction, and both works are continuous. Therefore, the waste of the power for the operation is small, and the time required for the operation is shortened accordingly.

In general, the connection work is easy and can be performed quickly.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention together with its usage, in which FIG. 1 (a) is a front view thereof, FIG. 1 (b) is a right side view thereof, and FIG. ) And (d)
FIG. 4 is an enlarged view showing a part of the above.

FIG. 2 is a perspective view showing only a main part of another embodiment of the present invention.

[Explanation of symbols]

 1 Existing pipe 2 Pipe to be connected 5 Base rod 6 Guide hole 7 Holding rod 8, 16, 18 Support shaft 9 Locking piece 10 Rib on outer peripheral surface of pipe 2 Operation rod 12 Gripping rod 13 Traction rod 14 Locking claw 15 Rib on outer peripheral surface of tube 1 17 Traction tools 19, 20, 22 Connection rod 23 Connection block

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area F16L 33/28

Claims (1)

[Claims] 1. A pipe connecting device used for connecting corrugated pipes to each other, wherein a base rod disposed horizontally above one pipe to be connected so as to straddle the pipe, and the base rod. A pair of holding rods that are rotatably connected to both ends of the rod and provided with locking pieces that can be inserted between the ribs on the outer peripheral surface of the tube body at the tip end, and the upper portion is a holding rod, and the lower portion is A bifurcated bifurcated rod is provided. Between both ends of the tow rod, locking claws that can be fitted between ribs on the outer peripheral surface of the tubular body are rotatably connected with both ends of the tow rod as fulcrums. The operating rod and a traction tool bridged between the operating rod and the holding rod. A connecting device for a pipe body, which is characterized in that