JP3059601U - Jig for connecting pipes - Google Patents

Abstract

(57) [Summary] [Problem] In the propulsion method, the first existing one facing the work pit
The front end of the newly installed second discharge pipe is easily inserted and connected to the rear end of the discharge pipe. A first arm and a second arm facing each other are provided.
And The first arm 21 grips the rear end of the existing first discharging pipe 5a. The second arm 22 grips the front end of the newly provided second discharging pipe 5b. The first arm 21 and the second arm 22 are connected by a boost link mechanism 26. When the operation handle 25 is swung, the second arm 22 moves closer to the first arm 21 side. Thus, the front end of the second discharge pipe 5b can be inserted and connected to the insertion port 9 inside the rear end of the first discharge pipe 5a.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a connecting jig used for connecting two pipe ends. Especially in the field of burying conduits for passing optical cables etc. underground, when propulsion is performed while extending propulsion pipes underground, excavation pipes that discharge excavated soil through the propulsion pipes are added sequentially. However, it is suitable for use when connecting the discharge pipes.

[0002]

[Prior art]

 As shown in FIG. 2, the excavator 3 is excavated while sequentially adding the propulsion pipe 4 to the excavator 3 at the tip, in order to pass the conduit through the ground. At that time, the work of adding the propulsion pipe 4 and the discharge pipe 5 in the work pit 1 is performed. The discharge pipe 5 is for discharging the excavated soil at the tip of the mud to the ground through the existing propulsion pipe 4. The conduit will be laid through the propulsion pipe 4 which is connected and extended. In the conventional method, one worker faces the rear end of the existing first discharge pipe 5a facing the work pit 1 with the front end of the newly-installed second discharge pipe 5b as shown in FIG. Then, another worker pushes the rear end of the second discharging pipe 5b forward with a burl 55 and inserts the front end of the second discharging pipe 5b into the rear end of the first discharging pipe 5a. After that, the two discharge pipes 5a and 5b were connected with the joint 10.

[0003]

[Problems to be solved by the invention]

 However, the work of inserting and connecting the two discharge pipes 5a and 5b is difficult because the work space in the work pit 1 is narrow, and at least two workers must work at the same time, which requires labor. Had a problem. Therefore, an object of the present invention is to obtain a connection jig which allows relatively heavy pipes, especially the above-mentioned discharge pipes, to be easily and butt-connected without requiring any manpower.

[0004]

[Means for Solving the Problems]

 The present invention according to claim 1 is a connecting jig for joining the ends of both pipes 5a and 5b to connect the first pipe 5a and the second pipe 5b, and the end of the first pipe 5a. It has a first arm 21 for gripping the part and a second arm 22 for gripping the end of the second tube 5b. The first arm 21 and the second arm 22 are arranged to face each other and are connected to each other so as to be movable in a distance direction, and are disposed between the first arm 21 and the second arm 22 with respect to the first arm 21. The power steering apparatus further includes a boost link mechanism 26 for moving the second arm 22 closer to and from the front, and has an operating handle 25 that is swingably operated to operate the boost link mechanism 26. Here, the first pipe 5a is represented by the first discharging pipe 5a in the illustrated example, and the second pipe 5b is represented by the second discharging pipe 5b in the illustrated example. It is not limited to these drain pipes. It can also be used when the first pipe 5a and the second pipe 5b are simply butted and welded.

According to the present invention, as shown in FIG. 2, a new second discharging pipe is provided at the rear end of an existing first discharging pipe 5 a passing through an underground propulsion pipe 4 in a working pit 1. A connection jig for inserting and connecting the front end of the first discharge pipe 5b, a first arm 21 for holding the rear end of the first discharge pipe 5a, and a second arm for holding the front end of the second discharge pipe 5b. And an arm 22. As shown in FIG. 1, the first arm 21 and the second arm 22 are disposed so as to be opposed to each other in the front-rear direction, and are connected so as to be movable only in the front-rear direction. And a booster link mechanism 26 for moving the second arm 22 closer to the first arm 21. In order to operate the booster link mechanism 26, a swing operation is performed in the front-rear direction. Operation handle 25 to be operated. In this case, a plug-in connection in which the front end of the second discharge pipe 5b is fitted inside the rear end of the first discharge pipe 5a, or the front end of the second discharge pipe 5b is fitted externally to the rear end of the first discharge pipe 5a. Plug-in connection method.

According to the third aspect of the present invention, as shown in FIG. 2, an existing first discharging pipe 5 a that is passed through the underground propulsion pipe 4 and whose rear end faces the working pit 1, The front end has a newly provided second discharging pipe 5b connected to the rear end of the first discharging pipe 5a. As shown in FIG. 3, the first discharge pipe 5a has a flange 7 projecting from the outer periphery of the rear end thereof, an outer thread 8 formed on the outer peripheral surface behind the flange 7, and a difference between the inner peripheral surface of the rear end. An entrance 9 is formed. As shown in FIG. 3, a packing receiver 11 for fitting a ring packing 12 is provided on the outer periphery of the front end of the second discharge pipe 5b, and a joint 10 is mounted on the outer periphery of the front end so as to be movable back and forth. At the rear end of a joint body 15 of the joint 10 having an internal thread 13 screwed to the external thread 8, an engagement flange 16 engaging with a rearward engagement surface 11 a of the packing receiver 11 is provided inwardly. It has become something. In addition, the present invention provides a connection jig 20 for inserting and connecting the front end of the second discharging pipe 5b including the packing receiver 11 with the ring packing 12 to the insertion port 9 inside the rear end of the first discharging pipe 5a. As shown in FIG. 1, the connection jig 20 includes a first arm 21 for gripping a rear end of the first discharging pipe 5a and a second arm 22 for gripping a front end of the second discharging pipe 5b. And The lower surface of the first arm 21 is open as shown in FIGS. 1 and 4, and is fitted to the outer periphery of the first discharge pipe 5a from above, and is engaged with the forward engagement surface 7a of the flange 7 to be rearward. It has a rearward-facing regulating surface 45 for preventing the device from falling off. The lower surface of the second arm 22 is open as shown in FIGS. 1 and 5, and the second arm 22 is fitted to the outer periphery of the second discharge pipe 5 b from above, and is engaged with the rearwardly engaging surface 11 a of the packing receiver 11. It has a forward regulating surface 46 for preventing forward dropping. The first arm 21 and the second arm 22 are relatively movably connected to each other. A boost link mechanism 26 for moving the second arm 22 closer to the first arm 21 as shown in FIG. 1 is provided between the first arm 21 and the second arm 22. The boost link mechanism 26 includes an operation handle 25 that is swingably operated in the front-rear direction in order to operate the mechanism.

More specifically, a protrusion 50 is provided on the forward regulating surface 46 of the second arm 22 to engage with the rearward engaging surface 11a of the second discharge pipe 5b. As shown in FIG. 5, the boost link mechanism 26 has a handle base 27 located outside one of the first and second arms 22, and the operation handle 25 is provided at the left and right center of the handle base 27. As shown in FIG. 1, a fulcrum portion 29 and an operating portion 30 are provided vertically at lower left and right ends of the handle base 27, and each lower operating portion 30 is located outside of each of the left and right side arm portions 22b of one arm 22. Via a first shaft 31. It is assumed that each of the upper fulcrum portions 29 and the outside of each of the left and right side arm portions 21b of the other arm 21 are connected by a link 32 via a second shaft 33 and a third shaft 34, respectively.

As shown in FIG. 8, a stop shaft 40 is provided on one of the left and right side arm portions 21 b of the first arm 21 and one of the left and right side arm portions 22 b of the second arm 22 so as to face inward. Each of the stopping means 36 is provided with a stopping means 36 capable of switching between a protruding attitude and an outward retreating attitude, and the tip of the stopping shaft 40 is directly or indirectly attached to the outer peripheral surface of the discharge pipes 5a and 5b. It may include a mechanism for holding the protruding posture in which the protruding posture comes into direct contact.

[0009]

[Action]

 A description will be given of the use of the connection jig 20 in the case where the illustrated discharge pipe is connected. The rear end of the existing first discharge pipe 5a and the front end of the newly installed second discharge pipe 5b in the work well 1 are described. Positioning and setting are performed in the opposite shape. Then, as shown in FIG. 6, the operation handle 25 is tilted forward so that the arms 21 and 22 are maximally separated from each other, and the first arm 21 is attached to the rear end of the first discharge pipe 5a, and the second discharge pipe Each of the second arms 22 is fitted into the front end of 5b from above. At that time, the rearward regulating surface 45 of the first arm 21 is brought into contact with the forward engaging surface 7a of the flange 7 of the first discharging pipe 5a, thereby restricting the first arm 21 from moving backward and the second discharging pipe. The forward restricting surface 46 of the second arm 22 is applied to the rearward engaging surface 11a of the packing receiver 11 of 5b to restrict the second arm 22 from moving forward. Next, when the operation handle 25 is raised backward as shown in FIG. 7, the second arm 22 moves closer to the front first arm 21 via the boosting link mechanism 26. Thus, the front end of the second discharging pipe 5b gripped by the second arm 22 is inserted and connected to the insertion port 9 inside the rear end of the first discharging pipe 5a. Thereafter, the inner screw 13 of the joint 10 on the second discharging pipe 5b side is screwed into the outer screw 8 of the first discharging pipe 5a, and the engaging flange 16 of the joint main body 15 is engaged with the rearward engaging surface of the packing receiver 11. The engagement between the two discharge pipes 5a and 5b is completed by engaging with the discharge pipe 11a.

[0010]

[Effect of the invention]

 According to the connecting jig according to the present invention, the first pipe 5a is gripped by the first arm 21 and the second pipe 5b is gripped by the second arm 22 irrespective of the target pipe to be connected. Then, by simply swinging the operation handle 25, the ends of the two tubes 5a and 5b can be easily connected to each other via the boosting link mechanism 26 even when the ends are relatively heavy. Can be set in place.

According to the connecting jig according to the second aspect of the present invention, even in the narrow work pit 1, the front end of the newly installed second discharging pipe 5 b is located at the rear end of the existing first discharging pipe 5 a. As long as they are positioned and set so as to face each other, the first arm 21 and the second arm 22 need only grip each of the two drain pipes 5a and 5b so as to straddle each end thereof. With the handle 25, the front end of the second discharging pipe 5b can be easily and easily inserted and connected to the rear end of the first discharging pipe 5a via the boosting link mechanism 26 by one worker.

According to the connecting jig according to the third aspect of the present invention, after inserting the front end of the second discharging pipe 5b into the insertion port 9 at the rear end of the first discharging pipe 5a, The two pipes 5a and 5b are connected with each other by a union joint specification in which a cap nut-shaped joint 10 is used for screw connection. At this time, as long as the first arm 21 is dropped into the first discharging pipe 5a and the second arm 22 is dropped into the second discharging pipe 5b from above, the rearward regulating surface 45 of the first arm 21 is in the second position. (1) The front engagement surface 7a of the flange 7 on the side of the discharge pipe 5a contacts and engages, and the front restriction surface 46 of the second arm 22 contacts the rear engagement surface 11a of the packing receiver 11 of the second discharge pipe 5b. The operation of pulling the second discharging pipe 5b toward the first discharging pipe 5a through the boosting link mechanism 26 with the operating handle 25 requires the operation of the collar 7 and the packing receiver by one worker. There is an advantage that it can be carried out rationally and reliably by using the method of No. 11.

According to the connecting jig according to the present invention, the projection 50 is provided on the front regulation surface 46 of the second arm 22, and the projection 50 is the rear engagement surface of the packing receiver 11. 11a, the packing receiver 11 at the front end of the second discharging pipe 5b is fitted to the first discharging pipe 5a in a state where the ring packing 12 is fitted thereto by the amount of protrusion of the projection 50. It can be securely inserted to a predetermined position inside the insertion port 9.

According to the connecting jig according to the fifth aspect of the present invention, the booster link mechanism 26 has a handlebar on the outside of one of the first and second arms 21 and 22 so as not to interfere with the first and second arms 21 and 22. The handle 27 is mounted on the handle base 27 so that the operation handle 25 can be easily operated, and the links 32 are arranged on the left and right outer sides of the arms 21 and 22, respectively. It has the advantage that it can be easily carried to the work site with the base 27 or the operation handle 25 as a hand and used.

According to the connecting jig according to the present invention, the first arm 21 and the second arm 22 are provided with the stopping means 36 including the stopping shaft 40, respectively, so that the first arm is provided. 21 can be attached to the first discharge pipe 5a and the second arm 22 can be attached to the second discharge pipe 5b with a margin from above, while the tip of the stop shaft 40 is attached to the first and second discharge pipes 5a and 5b, respectively. By abutting, the front end of the second discharging pipe 5b can be positioned and adjusted correctly in the front-rear direction with respect to the rear end of the first discharging pipe 5a, and the insertion work between the two pipes 5a and 5b is easy and reliable. Can be done.

[0016]

【Example】

 In FIG. 2, reference numeral 1 denotes a work pit dug below the ground 2, and from this work pit 1, a drilling machine 3 at an end of the work pit is directed substantially horizontally to a work pit at a destination in order to pass a conduit for an optical cable. It is a well-known propulsion method of digging. As the excavator 3 digs while discharging mud from the tip of the excavator, the propulsion pipes 4 are sequentially added, and the discharge pipes 5 are also sequentially added and inserted into the propulsion pipes 4. Excavated soil is discharged into the mud tank 6 above the ground. The work of adding the propulsion pipe 4 and the discharge pipe 5 is performed manually in the work pit 1.

As shown in FIG. 3, a flange 7 is formed on the outer peripheral surface of the existing first discharging pipe 5 a facing the work pit 1, and an external thread 8 is formed on an outer peripheral surface on the rear side of the flange 7. A large-diameter insertion port 9 is formed in a stepped shape on the inner peripheral surface of the rear end opening. A joint 10 is inserted into the front end of the newly constructed second discharging pipe 5b, and a packing receiver 11 is provided on the outer peripheral surface of the pipe so as to protrude in a circular shape. Fitted. For example, the inner diameter of the discharge pipes 5a and 5b is 100 mm, the protrusion height of the flange 7 is 15 mm, and the packing receiver 11 has a front-rear width of 0.8 mm and a protrusion height of 5 mm.

The joint 10 has a union joint specification in which an engagement flange 16 is formed in a circular shape on the inner periphery of the rear end of a cap nut-shaped joint body 15 having an internal thread 13.

When connecting the second discharging pipe 5b to the first discharging pipe 5a, a packing receiver 11 with a ring packing 12 of the second discharging pipe 5b is included in the insertion port 9 at the rear end of the first discharging pipe 5a. Insert the front end. Next, the inner screw 13 of the joint 10 is screwed into the outer screw 8 of the first discharging pipe 5a, and screwed until the engagement flange 16 of the joint 10 engages with the packing receiver 11.

However, the present invention is characterized by a connecting jig 20 for inserting and connecting the front end of the second discharging pipe 5b to the rear end of the first discharging pipe 5a. As shown in FIG. 7, the connection jig 20 includes a first arm 21 that grips the rear end of the first discharging pipe 5a and a second arm 22 that grips the front end of the second discharging pipe 5b. Have.

As shown in FIG. 4 and FIG. 5, the first arm 21 and the second arm 22 have a generally inverted U-shape or a gate shape when viewed from the front, and the upper arms 21a and 22a and the left and right side arms, respectively. Parts 21b and 22b, and the lower surface is open. That is, the first arm 21 and the second arm 22 can be fitted to the outer circumference of each of the discharge pipes 5a and 5b from above through the lower surfaces of the openings.

The first arm 21 and the second arm 22 are disposed so as to face front and rear, and the upper arms 21 a and 22 a of the upper arms 21 a and 22 a are movable in parallel with the first arm 21. They are connected at three points: the left and right central portions and the lower end portions of the left and right side arm portions 21b and 22b. Specifically, as shown in FIGS. 4 to 7, the horizontal support rods 23 project rearward from the first arm 21 side at the respective connection point sites, and the collars provided on the second arm 22 side. Each support rod 23 is inserted through 24 through holes 24a.

The distance movement of the second arm 22 with respect to the first arm 21 is manually performed using a boost link mechanism 26 including an operation handle 25. As shown in FIGS. 5 and 6, the boost link mechanism 26 has a handle base 27 formed in a semicircular shape in a front view so as to be located outside the second arm 22. An operation handle 25 projects upward from the left and right central portions, and a fulcrum portion 29 and an action portion 30 are provided vertically at lower left and right ends of a handle base 27, respectively. The lower working portions 30 are connected to the outer sides of the left and right side arms 22 b of the second arm 22 via the first shaft 31, and the upper fulcrums 29 and the left and right sides of the first arm 21 are connected. The outside of the side arm portion 21b is connected by a link 32 via a second shaft 33 and a third shaft 34, respectively. Here, the lower end of the handle base 27 is bent and formed in a U-shape so that the operating handle 25 does not protrude greatly to the rear of the second arm 22, and the bent portion is set to a floating fulcrum portion 29. Have been.

As shown in FIGS. 4 and 5, each of the first arm 21 and the second arm 22 has a stopping means 36 near one lower end of the left and right side arm portions 21b and 22b. As shown in FIG. 8, each stop means 36 has a stop shaft 40 at the lower end of each side arm 21b, 22b through through holes 39, 39 provided between the left and right opposite walls 37, 37. The compression coil spring 41 is fitted around the outer periphery of the stop shaft 40 between the opposing walls 37, 37, and the stop shaft 40 is retracted outward by the spring 41. I'm going. The outer end of each retaining shaft 40 has an eyebolt-shaped operating portion 42. A lock portion 43 is provided on the stop shaft 40, and the outer through hole 39 is formed in a keyhole shape that allows the lock portion 43 to enter and exit as shown in FIG. 1.

When the stop shaft 40 is pushed inward against the spring 41 via the operation portion 42, the inner end of the stop shaft 40 protrudes into the inside of each of the side arms 21b and 22b. In this state, the stop shaft 40 is rotated in one direction, and the outer end of the lock portion 43 is wrapped around and engaged with the inner wall surface of the hole 39, thereby maintaining the stop shaft 40 in the stop position where the tip of the stop shaft 40 projects. Can be. Incidentally, the stop shaft 40 may be pushed and urged by a spring 41 so as to protrude inward.

Next, the procedure of using the connecting jig 20 of the present invention will be described. The rear end of the existing first discharging pipe 5a which is successively extended faces the inside of the work pit 1 as shown in FIG. The rear end of the first discharging pipe 5a is positioned and set by a device (not shown) such that the front end of the newly-installed second discharging pipe 5b faces the front and rear in the working pit 1. In this state, as shown in FIGS. 1 and 6, the operation handle 25 of the connection jig 20 is tilted leftward until it hits the upper support rod 23, and the first arm 21 and the second arm 22 are moved to the maximum. Then, the first arm 21 is fitted to the rear end of the first discharge pipe 5a, and the second arm 22 is fitted to the front end of the second discharge pipe 5b from above. The joint 10 on the second discharge pipe 5b has been retracted backward in advance.

At this time, the rearward restricting surface 45 of the first arm 21 is brought into contact with the front engaging surface 7a of the flange 7 of the first discharging pipe 5a, thereby restricting the first arm 21 from slipping backward. At the same time, the forward regulation surface 46 of the second arm 22 is brought into contact with the rearward engagement surface 11a of the packing receiver 11 of the second discharging pipe 5b, thereby restricting the second arm 22 from slipping forward.

As shown in FIGS. 4 and 6, the rearward regulating surface 45 of the first arm 21 has a total of four on the left and right sides of the upper arm portion 21a and the upper and lower central portions of the left and right side arm portions 21b. The protrusion 47 protrudes backward. When these protrusions 47 are received on the outer peripheral surface of the flange 7, the vertical height of the first arm 21 with respect to the first discharge pipe 5a, and in particular, the vertical height of the second arm 22 with respect to the second discharge pipe 5b. The position is defined.

Between the left and right side arms 21 b and 21 b of the first arm 21 and the first discharging pipe 5 a, and between the left and right side arms 22 b and 22 b of the second arm 22 and the second discharging pipe 5 b Since there is a margin for ease of fitting and mounting, arcuate backing plates 49 and 49 along the outer peripheral surface of the first discharge pipe 5a are inserted between the first and second arms 21 and 21 as needed. By setting the stop shafts 40 of the stop means 36 of the second arm 22 to the protruding posture and abutting the inner ends of the stop shafts 40 to the outer peripheral surfaces of the first and second discharge pipes 5a and 5b, The first and second arms 21 and 22 are correctly positioned with respect to 5a and 5b.

In this state, when the operation handle 25 on the handle base 27 is swung so as to stand rightward about the first shaft 31, the second arm 22 is connected to the first arm 21 via the link 32 as shown in FIG. Move closer to the side. The movement limit is defined by, for example, applying the collar 24 to the stepped surface of the support punch 23. As the second arm 22 moves closer to the first arm 21, the front end (including the packing receiver 11 with the ring packing 12) of the second discharging pipe 5 b gripped by the second arm 22 is moved to the first discharging position. The rear end of the clay pipe 5a is inserted into the inside of the insertion port 9 so that the ring packing 12 comes into contact with the inner peripheral surface of the insertion port 9.

At this time, in order to increase the insertion depth of the second discharging pipe 5b with respect to the first discharging pipe 5a, the forward regulating surface 46 of the second arm 22 has an upper arm portion 22a as shown in FIGS. A total of three protrusions 50 are provided at the upper and lower middle positions of the left and right central portions and the left and right side arm portions 22b, 22b. It is configured to abut the engaging surface 11b.

After inserting the front end of the second discharging pipe 5b into the rear end of the first discharging pipe 5a, the two discharging pipes 5a and 5b are connected by the joint 10. That is, the inner thread 13 of the joint body 15 on the second discharging pipe 5b side engages with the outer screw 8 of the first discharging pipe 5a, and the engaging flange 16 engages with the rearward engaging surface 11a of the packing receiver 11. Screw up.

As for the boost link mechanism 26, the upper part of the handle base 27 in the illustrated example may be deformed so as to become the operation handle 25, or the operation handle 25 may be protruded to the left and right of the handle base 27 so that both hands can be used. It may be possible to operate with. Further, the handle base 27 may be changed to a form in which the action portions 30 at the lower left and right ends are supported by the left and right arm portions 21b and 21b of the first arm 21 via the first shaft 31.

[Brief description of the drawings]

FIG. 1 is a side view of a connection jig.

FIG. 2 is a schematic side view illustrating a propulsion method.

FIG. 3 is a longitudinal sectional side view showing a rear end of a first discharging pipe and a front end of a second discharging pipe.

FIG. 4 is a sectional view taken along line AA of FIG. 7;

FIG. 5 is a sectional view taken along line BB of FIG. 7;

FIG. 6 is a partially longitudinal side view in a state before insertion of the discharge pipes for explaining a usage procedure of the connection jig.

FIG. 7 is a partially longitudinal side view in a state after insertion of earth discharging pipes for explaining how to use the connection jig.

FIG. 8 is an enlarged vertical sectional front view showing a stopping means.

FIG. 9 is a schematic side view illustrating a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Working pit 4 Propulsion pipe 5a 1st discharge pipe 5b 2nd discharge pipe 7 Flange 7a Front engagement surface of flange 8 Outer screw 9 Insertion port 10 Joint 11 Packing receiver 12 Ring packing 13 Inner screw 15 Joint body 16 Engagement flange Reference Signs List 20 connection jig 21 first arm 22 second arm 23 support punch 25 operating handle 26 boost link mechanism 27 handle base 29 fulcrum 30 working part 31 first shaft 32 link 33 second shaft 34 third shaft 36 stopping means 40 stop shaft 45 rearward regulating surface of first arm 46 forward regulating surface of second arm 50 projection

Claims (6)

[Utility model registration claims] 1. A connecting jig for abutting ends of two pipes (5a, 5b) to connect the first pipe (5a) and the second pipe (5b), and grips an end of the first pipe (5a). The first arm 21 and the second tube 5b
The first arm 21 and the second arm 22 are arranged to face each other and are connected to each other so as to be movable in a distance. Between the first arm 21 and the second arm 22.
A jig for connecting a pipe having an operation handle 25 that is swingably operated to operate the boost link mechanism 26. 2. A connecting jig for inserting and connecting a front end of a newly-constructed second discharging pipe 5b to a rear end of an existing first discharging pipe 5a passed through an underground propulsion pipe 4 in the working pit 1. A first arm 21 for gripping a rear end of the first discharging pipe 5a;
A second arm 22 for gripping a front end of the discharging pipe 5b, wherein the first arm 21 and the second arm 22 are arranged in a front-rear opposed manner, and are connected so as to be movable only in the front-rear direction. A boost link mechanism 26 for moving the second arm 22 closer to the first arm 21 between the first arm 21 and the second arm 22.
A pipe connection jig having an operation handle 25 that is swingably operated in the front-rear direction to operate the boost link mechanism 26. 3. An existing first discharging pipe 5a, which is passed through an underground propulsion pipe 4 and has a rear end facing the working pit 1, and a front end connected to the rear end of the first discharging pipe 5a in the working pit 1. New second
The first discharging pipe 5a has a flange 7 protruding from the outer periphery of the rear end, an external thread 8 is formed on the outer peripheral surface behind the flange 7, and the first discharging pipe 5a has an inner peripheral surface on the rear end. An insertion port 9 is formed, and a packing receiver 11 for fitting a ring packing 12 on the outer periphery of the front end of the second discharging pipe 5b is provided in a protruding manner.
Joint body 1 having an internal thread 13 screwed to the external thread 8
A joint 10 is provided at the rear end of the first discharge pipe 5a at the rear end of the joint 10 in which an engagement flange 16 that engages with the rear engagement surface 11a of the packing receiver 11 projects inward and backward. A connection jig 20 for inserting and connecting the front end of the second discharge pipe 5b including the packing receiver 11 with the ring packing 12 to the insertion port 9 of the first jig. A first arm 21 for gripping a rear end of the earth pipe 5a and a second arm 21 for gripping a front end of the second earth pipe 5b.
The first arm 21 has an open lower surface, is fitted to the outer periphery of the first discharging pipe 5a from above, and engages with the forward engaging surface 7a of the flange 7 to move backward. The second arm 22 has an open lower surface, is fitted to the outer periphery of the second discharge pipe 5b from above, and has a rearward engagement surface 11a of the packing receiver 11. The first arm 21 and the second arm 22 are relatively movably connected to each other, and the first arm 21 and the second arm 22 are connected to each other. A boost link mechanism 26 for moving the second arm 22 closer to the first arm 21 between the two arms 22
The boost link mechanism 26 is a pipe connecting jig provided with an operation handle 25 that is operated to swing back and forth in order to operate the link. 4. The second arm 22 has a front-facing regulating surface 46 with a second
Projection 50 that engages with rearward engaging surface 11a of discharge pipe 5b
4. The jig for connecting a pipe according to claim 3, wherein the jig is projected. 5. The boost link mechanism 26 has a handle base 27 located outside one of the first and second arms 22. The operating handle 25 is provided at the left and right central portions of the handle base 27.
A fulcrum portion 29 and an operating portion 30 are provided vertically on the left and right lower ends of the handle base 27, and each lower operating portion 30 is provided outside the left and right side arm portions 22 b of the one arm 22. Each of the upper fulcrum portions 29 and the outer sides of the left and right side arm portions 21b of the other arm 21 are linked by a link 32 to the second shaft 33 and the third shaft 31.
5. The connection according to claim 3, wherein the connection is made via a shaft.
A jig for connecting the pipe described. 6. One of left and right side arm portions 21b of the first arm 21
And one of the left and right side arm portions 22b of the second arm 22 is provided with a stopping means 36 which enables the stopping shaft 40 to be freely switched between a posture in which the stopping shaft 40 protrudes inward and a posture in which it is retracted outside. Each of the stopping means 36 is configured such that the tip of the stopping shaft 40 is connected to the discharge pipes 5a and 5a.
6. The pipe connecting jig according to claim 5, further comprising a mechanism for holding the protruding posture of directly or indirectly contacting the outer peripheral surface of the pipe b.