JP2017101439A - Pipe installation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe installation device capable of preventing a propulsive force transfer medium from buckling.SOLUTION: A pipe installation device comprises: a pipe with square cross section; a rotary excavation body 10, which is located on one opening side of the pipe and rotates around a rotation center line L that intersects with a propulsive direction of the pipe; a rotary excavation body support part, which rotatably supports the rotary excavation body and is supported by an inner face of the pipe; a propulsive drive source; and a propulsive force transfer medium (propulsive force transfer rod-like body 202). The pipe installation device propels the pipe and installs the pipe underground by giving the propulsive force from the propulsive drive source to the rotary excavation body 10 and the pipe through the propulsive force transfer medium and the rotary excavation body support part. A buckling prevention member 203, which prevents the propulsive force transfer medium from buckling, is installed on the propulsive force transfer medium.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pipe installation device for installing a pipe having a square section in the ground.

  A pipe having a square cross section, a rotating excavator that is positioned on one end opening side of the pipe and that rotates around a rotation center line that intersects the propulsion direction of the pipe, and that rotatably supports the rotary excavator and on the inner surface of the pipe A supported rotary excavator support, a propulsion drive source, and a propulsive force transmission medium are provided, and the propulsive force from the propulsion drive source is transmitted to the rotary excavator and the pipe via the propulsive force transmission medium and the rotary excavator support. A pipe installation device is known in which the pipe is propelled and installed in the ground by applying to (see, for example, Patent Document 1).

JP 2013-1000065 A

In the pipe installation device of Patent Document 1, when the propulsive force from the propulsion drive source is applied to the propulsive force transmission medium, there is a problem that the propulsive force transmission medium is buckled.
An object of this invention is to provide the pipe installation apparatus which can prevent buckling of a propulsive force transmission medium.

According to the present invention, a pipe having a square cross section, a rotary excavator that is positioned on one end opening side of the pipe and that rotates around a rotation center line that intersects the propulsion direction of the pipe, and a rotary excavator that is rotatably supported And a rotary excavation body support portion supported on the inner surface of the pipe, a propulsion drive source, and a propulsion force transmission medium. The propulsive force from the propulsion drive source is transmitted via the propulsion force transmission medium and the rotary excavation body support portion. In a pipe installation device that is installed in the ground by propelling the pipe by applying it to the rotating excavator and the pipe, buckling prevention is performed to prevent the buckling of the propulsive force transmission medium. Since a member is provided, it becomes possible to prevent buckling of the propelling rod transmission medium when propulsive force from the propulsion driving source is applied to the propelling rod transmission medium, and the propulsive force applied by the propulsion driving source can be rotated. Reliable transmission to drilling body and pipe Uninaru.
The propulsive force transmission medium is formed by a pair of propulsive force transmission rods arranged on the left and right, and the buckling prevention member is provided so as to extend in the vertical direction and is connected to the left propulsion force transmission rod. Left-side vertically elongated portion, a right-side vertically elongated portion provided so as to extend in the vertical direction and connected to the right propulsive force transmitting rod-like body, and a left-right vertically elongated portion that connects the left-side vertically elongated portion and the right-side vertically elongated portion, or Since the left and right propelling force transmission rods are connected to the left and right propelling force transmission rods, the propulsion force from the propulsion drive source is applied to the left and right propulsion force transmission rods. The buckling of the force transmission rod-like body can be prevented, and the propulsive force applied by the propulsion drive source can be reliably transmitted to the rotary excavation body and the pipe.
Further, the propulsive force transmission medium is formed by a pair of propulsive force transmission rods arranged on the left and right sides, and the buckling prevention member includes a left and right connecting rod member that connects the left and right propulsive force transmission rods, and a left propulsion member. A left longitudinally elongated portion connected to the left end side of the left and right connecting rod-shaped bodies and in contact with the left propelling force transmitting rod-shaped body inside the force transmitting rod-shaped body and connected to the left end side of the left and right connecting rod-shaped bodies; A right vertical portion connected to the right end side of the left and right connecting rod-like bodies, and an upper end portion of the left vertical portion and a right vertical portion provided to extend in the vertical direction in contact with the right propulsive force transmission rod-like body inside the body The upper left and right connecting rods that connect the upper ends of the parts, and the lower left and right connecting rods that connect the lower ends of the left and right elongated parts and the lower ends of the right and left elongated parts, so that propulsion from the propulsion drive source When force is applied to the left and right propulsion transmission rods It will be able to prevent the buckling of the force transmitting rod member, so that the propulsion force imparted by the propulsion drive source can be reliably transmitted to the rotating drilling body and the tube.
In addition, it is provided so as to protrude toward the left inner surface side of the pipe from the left propulsive force transmission rod-shaped body, reducing interference between the left propulsive force transmitting rod-shaped body and the left inner surface of the pipe during recovery to the starting base The left interference reducing member and the right propulsive force transmitting rod-shaped body are provided so as to protrude toward the right inner surface side of the pipe from the right propelling force transmitting rod-shaped body, and the right propulsive force transmitting rod-shaped body and the right side of the tube at the time of recovery to the starting base With the right interference reduction member that reduces interference with the inner surface, it is possible to reduce the frictional resistance when collecting the propulsive force transmission rod-like body at the starting base, and the propulsive force transmitting rod-like body becomes the starting base The return operation can be easily performed.
Further, the buckling prevention members are provided at the left and right ends of the left and right connecting rod-like bodies, and the left and right interference reducing members that reduce interference between the left and right connecting rod-like bodies and the left and right inner surfaces of the pipe at the time of recovery to the starting base, Provided on both upper and lower ends of the left vertical portion and the right vertical portion, the left vertical portion, the right vertical portion, the upper left and right connecting rods, the lower left and right connecting rods and the upper and lower inner surfaces of the pipe at the time of recovery to the departure base With the upper and lower interference reduction members that reduce the interference, it is possible to reduce the frictional resistance when collecting the propulsive force transmission rod-like body to the starting base, and the propulsive force transmitting rod-like body is returned to the starting base. Work can be done easily.
Furthermore, since the interference reducing member has an outer surface formed in a curved shape and is provided so that the curved outer surface faces the inner surface of the tube, the curved outer surface and the inner surface of the tube are brought into contact with each other. As a result, it is possible to reduce the frictional resistance at the time of recovery when the propulsive force transmission rod-shaped body is recovered to the starting base, and the recovery work for returning the propulsive force transmission rod-shaped body to the starting base can be easily performed.

The cross-sectional view of a pipe installation apparatus. The longitudinal cross-sectional view of a pipe installation apparatus. The perspective view which looked at the excavator from the front side. The perspective view which looked at the excavator from the front side. The enlarged view of the front side part of a pipe installation apparatus. Operation | movement explanatory drawing of a vertical swing drive means. The perspective view which shows the thrust transmission rod-shaped body provided with the buckling prevention member.

Embodiment 1
Based on FIG. 1 thru | or FIG. 7, the structure and operation | movement of the pipe | tube installation apparatus 1 by Embodiment 1 for installing the pipe | tube 2 in the ground are demonstrated.
In the following, the upper side in FIG. 1 is the leading or front side of the tube installation device 1, the lower side in FIG. 1 is the rear side of the tube installation device 1, the left and right sides in FIG. A direction orthogonal to the vertical direction is defined as the upper and lower sides of the pipe installation device 1. That is, as shown by the arrows in FIG. 3, the front and rear, the left and right, and the top and bottom of the pipe installation device 1 are defined and described.

First, the configuration of the pipe installation device 1 will be described.
As shown in FIG. 1, the pipe installation device 1 includes a pipe 2 and a drilling device 3.
The excavator 3 includes an excavating machine 4, a propulsion device 5, a water supply / drainage device 6, a water stop device 7, a detecting means 8 (see FIG. 4; FIG. 5), a hydraulic motor, a hydraulic cylinder, and the like, which will be described later. And a control device 9 for controlling the power source.

  The pipe 2 installed in the ground by the excavator 3 is, for example, a pipe 2 having a rectangular cross section perpendicular to the center line of the pipe 2. The pipe 2 is a first pipe 2A that enters the ground first, and a plurality of subsequent pipes 2B; 2B... Sequentially connected to the rear of the first pipe 2A.

The rotary excavator 10 is positioned at a position in front of the one end opening 2t, which is the front end (tip) of the leading pipe 2A, and includes a rotary excavator support 12 that supports the rotary excavator 10 in a rotatable and swingable manner. .
The rotary excavator 10 is configured to rotate around a rotation center line L that intersects the propulsion direction F of the leading pipe 2A into the ground.
The rotary excavator 10 is configured to be swingable in the left-right direction and the up-down direction about the center line 2c of the leading pipe 2A.

  The excavating machine 4 includes a rotary excavator 10, a rotation drive unit 11 for the rotary excavator 10, a rotary excavator support 12, and a swing drive unit 13 for the rotary excavator 10.

  The rotary excavator 10 includes, for example, a circular box-shaped rotary body 18 that is closed at one end and has a cylindrical portion 16 and a bottom plate 17 that closes the other end of the cylindrical portion 16, and an outer periphery of the cylindrical portion 16 of the rotary body 18. It is the structure provided with several excavation bits 20; 20 ... provided in the surface 19. FIG.

The rotation driving means 11 of the rotary excavation body 10 includes, for example, a motor and a rotation driving source of the motor. As the motor, for example, a motor that operates by fluid pressure or a motor that operates by electricity is used.
The rotary drive unit 11 of the rotary excavator 10 is constituted by, for example, a hydraulic motor (hereinafter referred to as a hydraulic motor 21) and a hydraulic source (not shown) as a rotary drive source of the hydraulic motor 21. In this case, the hydraulic source and the hydraulic motor 21 are connected by a pressure hose 23 having a pressure oil supply path and an oil return path.
For example, the casing 24 of the hydraulic motor 21 is fixed to the motor mount 25, and the rotating shaft 26 is configured to rotate by pressure oil supplied to the hydraulic motor 21 from the hydraulic source via the pressure hose 23. Further, the rotary shaft 26 rotated by the hydraulic motor 21 and the inner surface of the bottom plate 17 of the rotary body 18 so that the circle center of the inner surface of the bottom plate 17 of the rotary body 18 of the rotary excavator 10 and the rotation center of the rotary shaft 26 coincide with each other. Are connected to a connecting plate 28 provided at the tip thereof by a connecting tool 29 such as a screw.
That is, the two rotary excavating bodies 10; 10 are positioned in front of the one end opening 2t of the leading pipe 2A, and the two rotary excavating bodies 10; 10 are one rotation center line L common to the two rotary shafts 26; 26. Is configured to rotate around the center of rotation. Such a configuration including the two rotary excavators 10; 10 is called a twin header.

The rotary excavator support section 12 can rotate the rotary excavator 10 by supporting the support 14 supported on the inner surface of the leading pipe 2A, the base end side being connected to the support body 14, and the distal end side being connected to the hydraulic motor 21. And a connecting support column portion 15 to be supported.
The support body 14 is supported by a support substrate 30 in which the base end side of the connection support column 15 is connected to the front surface 44, and the support substrate 30 and a tube side support portion 32 provided on the inner surface of the leading tube 2A. A cylindrical support 31 is provided.
In the stationary state of the pipe installation device 1, the rotary excavator 10 is supported by the top pipe 2A via the rotary excavator support 12 and the rotary excavator 10 is driven for excavation. , The leading pipe 2A is pulled by the rotary excavator 10 (the traction force by the rotary excavator 10 is transmitted to the leading pipe 2A via the rotary excavator support part 12 and the pipe side support part 32). Thus, the top pipe 2A is pulled). In the present invention, all of these states are defined as “support”.

The connection column part 15 includes a column part 33 and a connection frame 34.
The support column 33 includes a hollow support column 35, a reinforcement connecting portion 36 having a reinforcing portion that reinforces the hollow support column 35 and a connecting plate that is connected to the connecting mount 34.
The hollow strut portion 35 includes a main strut portion 38 and two branch strut portions 39; 39 that extend from the front end of the main strut portion 38 to the left and right. The two branching struts 39; 39 extend from the front end of the main strut 38 in a direction away from each other on a straight line orthogonal to the extending direction of the main strut 38. In other words, the hollow column portion 35 has a T-shaped hollow space in which one main column portion 38 and two branch column portions 39; 39 are combined.

The front ends of the branch struts 39; 39 are connected to the motor mounts 25; 25 of the rotary excavators 10; And the pressure | voltage resistant hose 23; 23 connected with each hydraulic motor 21; 21 of each rotary excavation body 10; 10 is extended outside from the rear-end opening of the hollow support | pillar part 35 through the inner side of the hollow support | pillar part 35, and a figure. Connected to an external hydraulic source.
Therefore, when the pressure oil is supplied to the hydraulic motors 21; 21 of the two rotary excavators 10; 10 through the respective pressure hoses 23; 23, the two rotary shafts 26; 10; 10 is a twin header that rotates around a common rotation center line L.
In addition, at the rear end opening of the hollow strut portion 35, for example, the pressure hose 23; 23 in the hollow strut portion 35 connected to each hydraulic motor 21; 21 and the external pressure hose 23; 23 connected to the hydraulic source. Are connected to each other. Further, the external pressure hose 23; 23 may be configured such that the long pressure resistant hose 23 is replaced or the pressure resistant hose 23 is sequentially added as the pipe 2 is propelled into the ground.

The connecting frame 34 sets the position where the reinforcing connecting portion 36 is connected to a position away from the front surface 44 of the support substrate 30, and sets the rotation center line L of the two rotary excavators 10; 10 to one end of the leading pipe 2 </ b> A. It is an adjustment member for positioning in front of the opening 2t.
The connecting gantry 34 includes a cylindrical body 40 that penetrates the main support column 38, a rear end plate 41 that has a plate surface that surrounds the rear end periphery of the cylindrical body 40 and is orthogonal to the center line of the cylindrical body 40, and the cylindrical body 40. And a front end plate 42 having a plate surface that is orthogonal to the center line of the cylindrical body 40 and surrounds the periphery of the front end.
Accordingly, the connection frame 34 is arranged so that the center line of the cylindrical body 40 of the connection frame 34 and the center line of the main support column through hole 43 formed in the support substrate 30 coincide with each other. The rear end plate 41 of the connection base 34 is connected to the front surface 44 of the support substrate 30 in a state where the rear plate surface of the surface 41 and the front surface 44 around the through hole of the support column 30 are in surface contact.
Further, the rear end side of the main support column 38 is inserted into the inside of the cylindrical body 40 of the connection frame 34 from the front side of the connection frame 34, and the connection plate of the reinforcing connection part 36 and the front end plate 42 of the connection frame 34 are faced. By being connected in contact, the front opening 45 of the cylindrical body 40 of the connection base 34 is sealed.
Thereby, the main support column 38 is provided so as to extend in a direction orthogonal to the front surface 44 of the support substrate 30, and the rotating shafts 26; 26 of the two hydraulic motors 21; Further, they extend in directions away from each other on a straight line orthogonal to the extending direction of the main support column 38 (that is, on the center line of the branch support column 39; 39).
As described above, the excavation machine 4 has a configuration in which the rotary excavator 10 is connected to the front surface 44 of the support substrate 30 via the rotary excavator support 12 so that the rotary excavator 10 can rotate.

The rotary excavator 10 includes a rotary body 18 that rotates about the rotation center line L as a rotation center, and a plurality of excavation bits 20 provided to protrude from the outer peripheral surface 19 of the cylindrical portion 16 of the rotary body 18. As shown in FIG. 2, the rotation diameter dimension 46L when rotating is the upper and lower outer surfaces 2f of the tube 2; the shortest distance dimension between 2f (one pair of outer surfaces of the tube 2 parallel to the rotation center line L) 2f; the shortest distance dimension between 2f), or the shortest distance dimension between the upper and lower inner surfaces of the tube 2 (the shortest distance dimension between one pair of inner surfaces of the tube 2 parallel to the rotation center line L). Is also formed large.
The rotary excavator 10 is configured to be able to pass through the pipe 2 in a recoverable state (the state of the rotary excavator 10 shown in FIG. 2).
That is, when the rotary excavator 10 is in the recoverable state described above, the uppermost position located in the uppermost direction in the direction along the line perpendicular to the upper and lower inner surfaces (one pair of inner surfaces of the pipe 2) of the leading pipe 2A. Is located at the lowest position in the direction along the line perpendicular to the upper end of the excavation bit 20 (the upper end of the excavation bit 20 closest to the same plane as the inner surface on the top pipe 2A) and the upper and lower inner surfaces of the top pipe 2A. 46S between the lower end of the lowermost excavation bit 20 (the lower end of the excavation bit 20 closest to the same plane as the inner surface under the top pipe 2A) (when the rotary excavator can be recovered) The maximum dimension between the upper and lower bits) is configured to be smaller than the shortest distance dimension between the upper and lower inner surfaces of the pipe 2.
Accordingly, when the rotary excavator 10 is rotationally driven in a state where the rotary excavator 10 is positioned in front of the one end opening 2t of the top pipe 2A, a plurality of excavation bits 20, 20,. Therefore, it is possible to excavate the top and bottom of the ground in front of the top pipe 2A, that is, to dig a vertical width larger than the top and bottom width of the top pipe 2A, and use the rotary excavator 10 as a starting base. At the time of recovery, the rotary excavator 10 can be pulled back into the pipe 2 by setting the rotary excavator 10 so as to be in the recoverable state described above, and the rotary excavator 10 can be recovered to the starting base. Is possible.

As shown in FIG. 4; FIG. 5, the detection means 8 is for detecting that the rotary excavation body 10 is in the above-described recoverable state. For example, the detection means 8 is an example of a magnetic field generation means as a detected object. A detection sensor using a certain magnet 51 and a Hall IC 52 which is an example of magnetic detection means as a detection body for detecting the magnet 51 is used. The magnet 51 is protected by a cover 53.
That is, for example, the Hall IC 52 is rotated and excavated so that the Hall IC 52 can detect the magnet 51 by minimizing the distance between the Hall IC 52 and the magnet 51 when the rotating excavator 10 is in the recoverable state described above. The magnet 51 is fixed on the peripheral surface of the rotating body 18 by fixing the body 10 to the outer surface of the column 33 of the rotary excavating body support 12 that rotatably supports the body 10.
By providing the detection means 8 configured in this manner, when the rotary excavation body 10 is in a recoverable state, the Hall IC 52 detects the magnet 51, so that the rotary excavation body 10 is in a recoverable state. This can be notified to the ground by light, voice or the like, and the operator can know that the rotary excavation body 10 is in a recoverable state on the ground. That is, the operator slowly rotates the rotary excavator 10 before performing the operation of recovering the rotary excavator 10 to the starting base, and the Hall IC 52 detects the magnet 51 so that the rotary excavator 10 can be recovered. If it is confirmed by a not-shown notification means, the rotary excavator 10 can be put into the pipe 2 by stopping the rotation of the rotary excavator 10, so that the rotary excavator 10 is routed through the pipe 2. It is possible to collect at the departure base.
That is, since the detection means 8 is provided, it is reliably detected that the rotary excavation body 10 is in a recoverable state, and therefore the rotary excavation body 10 can be recovered when the rotary excavation body 10 is recovered to the starting base. It becomes possible to confirm whether or not the vehicle is in a state, and the recovery work for recovering the rotary excavated body 10 to the departure base can be easily performed.

  The leading pipe 2A includes, for example, a front end side pipe 61, a rear side pipe 62, and a support pipe 63 provided between the front end side pipe 61 and the rear side pipe 62 for supporting the cylindrical support body 31. Provided, the front end surface of the rear tube 62 and the rear end surface of the support tube 63 are connected by welding or the like, and the front end surface of the support tube 63 and the rear end surface of the front end side tube 61 are connected by welding or the like. .

  The cylindrical support 31 is installed on the front side in the top tube 2A so that the center line of the tube of the cylindrical support 31 extends along the center line 2c of the top tube 2A. For example, the cylindrical support body 31 is formed of a cylindrical body having a rectangular cross section, and the center tube 2c of the top tube 2A is the same as the center line 2c of the top tube 2A. It is installed on the front side in 2A and supported by the support pipe 63.

The left and right outer surfaces 65; 65 of the cylindrical support 31 are formed with, for example, cylindrical protrusions 66; 66 as engaging protrusions protruding from the outer surface 65; 65, and the left and right inner surfaces of the support tube 63. Are formed with recesses 68; 68 as engaging recesses with which the cylindrical projections 66; 66 project from the left and right outer surfaces 65; 65 of the cylindrical support 31 are engaged.
As shown in FIG. 5, the concave groove 68 formed in the support pipe 63 has an entrance path 69 for receiving the cylindrical protrusion 66 from the rear side of the top pipe 2A, and the front end side of the entrance path 69 is a semicircular recess. It is formed by the recessed part used as the wall 70 (pipe side support part 32). That is, the concave groove 68 has a road width that is substantially the same as the diameter of the circle of the cylindrical protrusion 66 (a diameter that is a few millimeters larger than the diameter of the circle of the cylindrical protrusion 66). An approach path 69 that restrains the movement of the direction, and the front end side of the approach path 69 is in contact with the circumferential surface of the columnar protrusion 66 to restrict the forward movement of the columnar protrusion 66. It is formed by a semicircular concave wall 70 having substantially the same diameter as the diameter (a diameter that is several millimeters larger than the diameter of the circle of the cylindrical protrusion 66). The center of the circle of the cylindrical protrusion 66 is positioned at the center between the upper and lower sides of the left and right outer surfaces 65; 65 of the cylindrical support 31, and the center of the circle of the semicircular concave wall 70 in the concave groove 68 is It is located at the center between the upper and lower surfaces of the left and right inner surfaces of the support tube 63.

Therefore, in the initial state in which the cylindrical protrusions 66; 66 engage with the concave grooves 68; 68, the cylindrical protrusions 66; 66 collide with the concave walls 70; 70, and the cylindrical support 31 cannot move forward. The rotation support part 71 that forms the center of rotation of the cylindrical support 31 is configured, and the cylindrical support 31 rotates around the rotation support part 71 so that the rotary excavation body can swing vertically. It is configured.
In this way, the engaging convex portion is formed by the cylindrical projection 66; 66, and the entrance recess 69 into which the engaging concave portion enters the cylindrical projection 66 and the semicircular concave wall 70 in which the cylindrical projection 66 matches are formed. Since it is formed by the concave groove 68, the work of forming the rotation support portion 71 of the cylindrical support 31 by engaging the cylindrical protrusions 66; 66 with the concave groove 68; 68 is facilitated and rotated. By providing the support portion 71, the cylindrical support 31 can be smoothly rotated. Further, the cylindrical support 31 can be easily and reliably supported on the concave wall 70 functioning as the tube side support portion 32.

As shown in FIG. 2, a support surface 72 that supports the cylindrical support 31 so as to be swingable in the vertical direction is provided on the inner peripheral surface on the front end side of the support tube 63. The support surface 72 is configured by, for example, an annular body 74 made of, for example, rubber and attached to an annular attachment groove 73 formed on the inner peripheral surface of the front end side of the support tube 63.
The front end side of the outer peripheral surface of the cylindrical support 31 is configured to be a supported surface 75 formed on a reduced diameter outer surface that is reduced in diameter toward the front end, and the support surface 72 is in contact with the supported surface 75. That is, it is formed on a reduced diameter inner surface formed so as to reduce the diameter toward the front end.
In addition, the support surface 72 is formed of rubber, and the outer side of the front end side of the reduced diameter inner surface forming the support surface 72 is formed in a cavity 76 having an open front end, and the contraction surface forming the support surface 72 is formed. The front end side of the inner diameter surface is easily deformed to the outside (the inner peripheral surface side of the support tube 63), and the rotary excavator 10 is easily swung in the vertical direction. When the cylindrical support 31 is swung in the vertical direction, the upper and lower surfaces of the support surface 72 function as guide surfaces.

The concave groove 68 and the annular mounting groove 73 as the engaging concave portions formed in the support tube 63 are formed by denting the reference inner surface 80 of the support tube 63.
As shown in FIG. 5, the maximum length between the left and right sides of the cylindrical support 31 that is the distance between the end surface of the left cylindrical projection 66 and the end surface of the right cylindrical projection 66 of the cylindrical support 31 is The length is slightly shorter than the maximum length between the left and right sides of the support tube 63, which is the distance between the bottom surface of the left groove 68 and the bottom surface of the right groove 68 of the support tube 63.
Further, the length between the left and right outer surfaces 65; 65 of the cylindrical support 31 is formed to be shorter than the length between the left and right reference inner surfaces 80; 80 of the support tube 63. A gap 81S is formed between the reference inner surface 80 and the left outer surface 65 of the cylindrical support 31, and between the right reference inner surface 80 of the support tube 63 and the right outer surface 65 of the cylindrical support 31. (See FIG. 5).
The length between the upper and lower outer surfaces 84; 84 of the cylindrical support 31 is formed to be shorter than the length between the upper and lower reference inner surfaces 80; 80 of the support pipe 63. A gap 85 is formed between the upper outer surface 84 and the reference inner surface 80 above the support tube 63 and between the outer surface 84 below the cylindrical support 31 and the reference inner surface 80 below the support tube 63. (See FIG. 2).
Therefore, in the initial state where the cylindrical support 31 cannot move to the front side, the contact portion between the cylindrical support 31 and the support tube 63 is the circumferential surface of the cylindrical protrusion 66 of the cylindrical support 31 and the concave groove. 68 is only a contact portion with the concave wall 70, and a contact portion between the supported surface 75 on the front end side of the outer peripheral surface of the cylindrical support 31 and the support surface 72 of the support tube 63, and the other portions are non-contact. Since the state is maintained, the cylindrical support body 31 is rotatable around the rotation support portion 71 as a rotation center.

The outer surfaces 65; 84 of the cylindrical support 31 are formed in a plane.
The reference inner surface 80 of the support tube 63 is formed in a plane.
The left and right inner surfaces 82; 82 of the cylindrical support 31 are curved concave surfaces that are curved so as to be recessed in the direction away from the center line along the center line of the cylindrical support 31, or the left and right reference inner surfaces of the support tube 63. 80; formed in a plane parallel to 80.

The support substrate 30 is formed in a rectangular flat plate shape whose outer peripheral shape is slightly smaller than the inner peripheral dimension of the cylindrical support 31 that matches the inner peripheral shape of the cylindrical support 31. It is supported so that it can swing.
The support substrate 30 has a plate thickness along the front-rear direction of the leading tube 2A, and the left and right outer surfaces (end surfaces) 83; 83 protrude and curve in a direction away from the center line along the center line of the support substrate 30. The curved convex surface or a plane parallel to the left and right reference inner surfaces 80 of the support tube 63 is formed.

For example, cylindrical protrusions 86; 86 (see FIG. 2) are provided at the center positions between the left and right sides of the upper and lower outer surfaces 67; 67 of the support substrate 30. The cylindrical projection 86; 86 is fitted into a circular hole 87; 87 formed on the upper and lower inner surfaces of the cylindrical support 31 so as to be rotatable around the center line of the cylindrical projection 86; With this configuration, the rotation support portion 88 of the support substrate 30 is formed, and the left and right ends of the support substrate 30 are configured to be swingable in the front-rear direction with the rotation support portion 88 as a rotation center. That is, the support substrate 30 is configured such that the pair of left and right inner surfaces 82; 83 facing each other of the cylindrical support 31 can swing in the front-rear direction around the rotation support portion 88 as a rotation center. It is attached to the cylindrical support 31.
When the rotary excavator 10 is connected to the support substrate 30 via the connection support portion 15, the left and right outer surfaces 83; 83 of the support substrate 30 swing in the front-rear direction. The rotary excavator 10 is configured to be swingable in the left-right direction around the center line 2c of the front pipe 2A, that is, in a direction orthogonal to the left and right inner surfaces of the front pipe 2A.

  As shown in FIG. 1 and FIG. 5, the left and right inner surfaces 82; 82 of the cylindrical support 31 are formed as curved concave surfaces that are curved along the center line of the cylinder of the cylindrical support 31. Are formed on curved convex surfaces that curve along the center line of the support substrate 30, and when the support substrate 30 moves in the front-rear direction, the left and right curved convex surfaces of the support substrate 30 and the left and right sides of the cylindrical support 31 are formed. When the curved concave surface is configured to slide, the movement of the support substrate 30 is stabilized.

As shown in FIG. 1, the support substrate 30 is formed with a main support column through-hole 43 and a tube holding through-hole 90 that penetrate the support substrate 30 back and forth.
For example, the support holding through-holes 43 are formed so as to penetrate the center portion of the support substrate 30, and the two water supply / drain pipe holding through-holes 90 are provided so as to penetrate the left and right positions of the support substrate 30. The distal end side of the water supply / drainage pipe 91 is connected to the pipe holding through hole 90.

As the swing drive means 13 of the rotary excavator 10, the rotary excavator 10 is moved up and down by swinging the upper and lower portions of the cylindrical support 31 back and forth around the rotation support portion 71 of the cylindrical support 31. A vertical swing driving means 100 for swinging in the upper and lower inner surfaces of the top tube 2A (a direction perpendicular to the pair of inner surfaces facing each other of the top tube 2A) and the rotation support portion 88 of the support substrate 30 are provided. As the rotation center, the left and right outer surfaces 83; 83 of the support substrate 30 are swung back and forth to move the rotary excavator 10 in the left-right direction (the left and right inner surfaces of the leading pipe 2A (the other pair of inner surfaces facing each other of the leading pipe 2A)) And a left-right swing drive means 150 for swinging in a direction perpendicular to the vertical axis.
That is, the base end side of the connecting support column 15 that rotatably supports the rotary excavator 10 is connected to the front surface 44 of the support substrate 30, and the support substrate 30 is swung around the rotation support portion 88 by the left and right swing drive means 150. By moving the rotary excavator 10, the direction along the upper and lower inner surfaces (one pair of inner surfaces of the front pipe 2A facing each other) of the front pipe 2A parallel to the rotation center line L of the rotary excavator 10, that is, The top tube 2A is configured to be swingable in the left-right direction.
Further, the support 14 is configured to be able to swing in the direction orthogonal to the upper and lower inner surfaces of the leading pipe 2A parallel to the rotation center line L of the rotary excavating body 10, that is, in the vertical direction of the leading pipe 2A, By swinging the support body 14 with the rotation support portion 71 as the rotation center by means 100, the rotary excavation body 10 has upper and lower inner surfaces (of the front pipe 2A) parallel to the rotation center line L of the rotary excavation body 10. It is configured to be swingable in a direction orthogonal to a pair of inner surfaces facing each other, that is, in the vertical direction of the leading pipe 2A.

As shown in FIGS. 2, 3, and 4, the vertical swing drive means 100 includes an vertical swing actuator 101 that serves as a drive source for swinging the rotary excavator 10 up and down, and an actuator installation portion 102. It is prepared for.
The vertically swinging actuator 101 is constituted by, for example, a hydraulic cylinder (hereinafter referred to as a hydraulic cylinder 101).
One hydraulic cylinder 101 is disposed on each of the left end side and the right end side behind the support substrate 30.

The actuator installation unit 102 includes a front frame 103 and a rear frame 104.
The front gantry 103 and the rear gantry 104 are arranged one by one on the left end side and the right end side behind the support substrate 30, respectively.
The front frame 103 has a front end connected to the rear end face 106 of the cylindrical support 31 and a cylinder side end 108 of the hydraulic cylinder 101 fixed to the rear end.
A piston rod side end 109 of the hydraulic cylinder 101 is fixed to the rear gantry 104.
The front frame 103 connects the front vertical member 110 connected to the rear end surface 106 of the cylindrical support 31, the rear vertical member 111, and the upper end portion of the front vertical member 110 and the upper end portion of the rear vertical member 111. The upper horizontal member 112, the lower horizontal member 113 that connects the lower end of the front vertical member 110 and the lower end of the rear vertical member 111, and the rear vertical member 111 are provided to extend rearward from the upper end side. An upper connecting member 114 and a lower connecting member 115 provided to extend rearward from the lower end side of the rear longitudinal member 111 are provided.
The rear gantry 104 extends in the vertical direction so as to extend forward from the upper longitudinal portion 116 connected to the upper coupling member 114 and the lower coupling member 115 of the front gantry 102 and from the upper end side of the front vertical portion 116. The formed hydraulic cylinder fixing portion 117, the rear vertical portion 118 provided so as to extend in the vertical direction continuously to the rear side of the front vertical portion 116, and the vertical direction on the rear end surface of the rear vertical portion 118 And a rear connecting portion 119 provided to extend rearward from the intermediate portion. A rear connection flange 120 connected to a front connection flange 204 provided at the front end of the subsequent thrust transmission rod 202 is provided at the rear end of the rear connection portion 119.

An upper elongated hole 121 extending in the vertical direction is formed on the upper side of the front vertical portion 116 of the rear gantry 104, and a lower side extending in the vertical direction on the lower side of the front vertical portion 116 of the rear gantry 104. A long hole 122 is formed.
A pin 123 provided on the rear end side of the upper connecting member 114 of the front gantry 103 is connected to the upper long hole 121 so as to be movable in the upper long hole 121, and the lower connection of the front gantry 103. A pin 124 provided on the rear end side of the member 115 is connected to the lower long hole 122 so as to be movable in the lower long hole 122.

  Further, the cylinder side end portion 108 of the hydraulic cylinder 101 is rotatably attached to the lower connecting member 115 of the front frame 103 via the rotation support shaft 108A, and the piston rod side end portion 109 of the hydraulic cylinder 101 is connected to the rear frame 104. The hydraulic cylinder fixing portion 117 is rotatably attached via a rotation support shaft 109A.

  Since the upper long hole 121 and the lower long hole 122 are formed so as to extend along an arc centering on the rotation support portion 71 serving as a rotation center when the cylindrical support 31 swings up and down, By operating the cylinder 101, the pin 123 as a shaft portion provided on the rear end side of the upper connecting member 114 of the front frame 103 moves in the upper long hole 121, and the lower connecting member 115 of the front frame 103. A pin 124 as a shaft portion provided on the rear end side moves in the lower elongated hole 122, and the front gantry 103, the rotary excavation body support portion 12, and the rotary excavation body 10 have the rotation support portion 71 as the rotation center. By rotating, the rotary excavator 10 can swing in a direction orthogonal to the upper and lower inner surfaces (one pair of inner surfaces of the leading pipe 2A) of the leading pipe 2A.

Since the actuator installation section 102 having the above configuration is provided, the rotary excavator 10 can be swung in the vertical direction as shown in FIG.
For example, when the piston rod 125 of the hydraulic cylinder 101 is set to an intermediate position between the maximum extension position and the maximum contraction position, the cylindrical support 31 is not rotated (the reference of the cylindrical support 31). It is assumed that the outer surface 81 and the reference inner surface 80 of the support pipe 63 are set in parallel (see FIG. 6A).
When it is desired to swing the rotary excavator 10 upward, as shown in FIG. 6B, the reaction force generated by extending the piston rod 125 causes the lower part of the front platform 103 to which the cylinder 126 is fixed. The cylindrical support 31 rotates around the rotation support portion 71 so that the side connecting member 115 moves downward and the pins 123; 124 move downward, so that the lower end of the front end of the cylindrical support 31 is rotated. The supported surface 75 slides on the lower support surface 72 that becomes the guide surface and moves forward, and the supported surface 75 at the upper front end of the cylindrical support 31 is on the upper support surface 72 that becomes the guide surface. Is moved rearward, and the rotary excavation body 10 moves upward.
Further, when it is desired to swing the rotary excavator 10 downward, as shown in FIG. 6C, the lower connecting member of the front gantry 103 to which the cylinder 126 is fixed by contracting the piston rod 125. The cylindrical support 31 rotates about the rotation support portion 71 so that the pins 123 and 124 move upward and the pins 123 and 124 move upward, so that the supported surface of the upper end of the cylindrical support 31 is supported. 75 slides on the upper support surface 72 serving as the guide surface and moves forward, and the supported surface 75 at the lower front end of the cylindrical support 31 slides on the lower support surface 72 serving as the guide surface. Then, the rotary excavator 10 moves downward.

  As described above, the cylindrical support 31 rotates around the rotation support portion 71 in response to the force from the hydraulic cylinder 101, and the supported surface 75 of the cylindrical support 31 is formed on the inner surface of the leading pipe 2A. The rotary excavator 10 is configured to be able to swing in the vertical direction about the center line 2c of the top pipe 2A by moving on the support surface 72 serving as the guide surface.

Further, the vertical swing driving means 100 includes a front gantry 103 and a rear gantry 104 which are separated, and a cylinder side end portion 108 of the hydraulic cylinder 101 is rotatably attached to the front gantry 103 via a rotation support shaft 108A. In addition, when the piston rod side end 109 of the hydraulic cylinder 101 is rotatably attached to the rear frame 104 via the rotation support shaft 109A, when the piston rod 125 of the hydraulic cylinder 101 is extended and contracted, the front side A pin 123 provided on the upper connecting member 114 of the gantry 103 moves in the upper long hole 121, and a pin 124 provided in the lower connecting member 115 moves in the lower long hole 122. Yes.
That is, the rotation support part 71 that is the rotation center when the rotary excavator 10 is swung in a direction orthogonal to the upper and lower inner surfaces (one pair of inner surfaces facing each other of the tube) of the subsequent tube 2B. A plurality of long holes 121 and lower long holes 122 formed so as to extend along the same circular arc centered on the pin, and the pin 123 moves in the upper long hole 121. Since the pin 124 is configured to move in the lower elongated hole 122, the rotary excavator 10 can be smoothly swung around the rotation support portion 71 as a rotation center.

  That is, in the pipe installation device 1 of the embodiment, when the rotary excavation body 10 swings in the vertical direction, the force received by the rotary excavation body 10 from the natural ground is a slide mechanism by the pin 123 and the upper long hole 121, the pin Rotating support shaft 108A of hydraulic cylinder 101 as a swing mechanism 124 and lower elongated hole 122; and a rotating support structure by rotating support shaft 109A. It becomes difficult to join 202. That is, when the rotary excavator 10 swings in the vertical direction, the force from the natural ground can be converted into the slide motion by the slide mechanism and the rotary motion by the rotary support structure, and the hydraulic cylinder 101 and the subsequent propulsive force transmission rod-like body Since the damage received by 202 can be reduced, it is possible to prevent the hydraulic cylinder 101 and the subsequent propulsive force transmission rod 202 from being damaged or destroyed.

That is, the rotary excavation body support portion 12 supports the rotary excavation body 10 in a rotatable manner, and is supported by the inner surface (support surface 72 and concave groove 68) of the leading pipe 2A and parallel to the rotation center line L of the rotary excavation body 10. The vertical excavator 10 is configured to be able to swing with the rotary excavator 10 in a direction orthogonal to the upper and lower inner surfaces of the leading pipe 2A. Swing in a direction perpendicular to the upper and lower inner surfaces.
That is, the vertical swing driving means 100 includes a hydraulic cylinder 101 as a swinging actuator serving as a drive source for swinging the rotary excavation body support unit 12 and an actuator installation unit 102. Reference numeral 102 denotes a front frame 103 connected to the rear end of the rotary excavator support 12 (the rear end face 106 of the cylindrical support 31) and the rear end (the connection flange 120 on the rear side of the rear connection 119). And a rear frame 104 to which a front end (front coupling flange 204) of a propulsive force transmission rod-like body 202 as a propulsive force transmission medium described later is coupled.
The front frame 103 includes an upper connecting member 114 and a lower connecting member 115 as connecting members, a pin 123 as a shaft provided on the upper connecting member 114, and a shaft provided on the lower connecting member 115. The rear frame 104 includes a front vertical portion 116 as a connecting portion extending in a direction orthogonal to the upper and lower inner surfaces of the top tube 2A, and extends in the extending direction of the front vertical portion 116. The upper elongated hole 121 and the lower elongated hole 122 are formed, and the pin 123 and the pin 124 provided on the upper coupling member 114 and the lower coupling member 115 of the front gantry 103 are the front longitudinal elongated portion 116 of the rear gantry 104. The upper long hole 121 and the lower long hole 122 are connected to each other so as to be movable.
Further, the hydraulic cylinder 101 is attached to the lower connecting member 115 so that one of the cylinder side end 108 and the piston rod side end 109 is a cylinder side end 108 as a connecting member of the front pedestal 103, In addition, the piston rod side end portion 109 which is the other of the cylinder side end portion 108 and the piston rod side end portion 109 is rotatably attached to a hydraulic cylinder fixing portion 117 as a connecting portion of the rear pedestal 104.
Then, the upper long hole 121 and the lower long hole 122 of the rear pedestal 104 are extended along an arc centering on the rotation support portion 71 that becomes the rotation center when the cylindrical support 31 is vertically swung. Is formed.

  As described above, the vertical swing driving means 100 is configured, and by operating the hydraulic cylinder 101, the shaft 123 provided on the upper connecting member 114 of the front pedestal 103 and the lower connecting member 115 are provided. The pin 124 as the shaft portion moves in the upper long hole 121 and the lower long hole 122 of the rear gantry 104, and the front gantry 103, the rotary excavation body support portion 12, and the rotary excavation body 10 move the rotation support portion 71. The rotary excavator 10 is configured to be able to swing in a direction orthogonal to the upper and lower inner surfaces of the top pipe 2A by rotating as a center of rotation, and propulsive force from a propulsion drive source described later is transmitted as propulsive force. The pipe 2 is propelled by being applied to the rotary excavator 10 and the top pipe 2A via the propelling force transmission rod 202 as a medium, the actuator installation section 102, and the rotary excavator support section 12. It is possible to be installed in the ground.

As shown in FIG. 2, the succeeding pipe connected to the rear end of the leading pipe 2A is a projection 131 that contacts the rear surface 130 of the rear longitudinal portion 118 of the rear gantry 104 and prevents the excavating machine 4 from moving backward. It is provided so as to protrude from the left and right inner surfaces of 2B.
Accordingly, when the excavating machine 4 is propelled upward, the protrusion 131 supports the rear surface 130 of the rear elongated portion 118 of the rear gantry 104, so that the excavating machine 4 can be prevented from moving downward (falling). .
In addition, the said protrusion is comprised by the volt | bolt etc. which were attached to the screw hole part outside a figure provided in the right-and-left inner surface of the succeeding pipe | tube 2B etc., for example, when setting the excavating machine 4 to the top pipe 2A, or excavating machine In the case of propelling 4 downward, etc., it can be removed. That is, the protrusion is removed because it becomes an obstacle when the excavating machine 4 is set on the leading pipe 2A, and is unnecessary when the excavating machine 4 is pushed downward.

By providing the vertical swing driving means 100, the rotary excavator 10 can be swung in the vertical direction with reference to the center line 2c of the leading pipe 2A, and the vertical width of the leading pipe 2A in front of the leading pipe 2A. Since the natural ground can be excavated at a wider vertical interval than the interval, the leading pipe 2A can be smoothly promoted. That is, prior to the advancement of the leading pipe 2A, a cross-sectional area wider than the sectional area of the leading pipe 2A can be excavated in front of the leading pipe 2A, and an extra moat in front of the leading pipe 2A becomes possible. Even when the natural ground is hard ground, the leading pipe 2A can be smoothly promoted in the ground.
Further, the propulsion direction of the leading pipe 2A can be adjusted up and down by swinging the rotary excavator 10 upward or downward with the center line 2c of the leading pipe 2A as a reference.
Further, it is possible to deal with a case where it is desired to excavate only the upper side in front of the front pipe 2A or a case where it is desired to excavate only a lower side in front of the front pipe 2A.

As shown in FIG. 4, the left / right swing driving means 150 is configured to include a left / right swing actuator 151 serving as a drive source for swinging the rotary excavator 10 to the left and right, and an actuator installation portion.
The left / right swinging actuator 151 is constituted by, for example, a hydraulic cylinder (hereinafter referred to as a hydraulic cylinder 151).
Two hydraulic cylinders 151 are provided, one on each of the left end side and the right end side behind the support substrate 30.
As shown in FIG. 4, the left hydraulic cylinder 151 has a piston rod side end 152 and a movable connecting means 154 whose upper and lower central sides on the rear surface 153 of the support substrate 30 as an actuator installation portion are movable like a hinge. And the cylinder side end 155 and the vertical center side of the rear longitudinal member 111 of the left front gantry 103 as the actuator installation portion are connected by a movable connecting means 156 such as a hinge.
Similarly, the right hydraulic cylinder 151 is connected to the piston rod side end 152 and the right upper and lower central side of the rear surface 153 of the support substrate 30 as an actuator installation portion by a movable connecting means 154 such as a hinge. Further, the cylinder side end portion 155 and the vertical center side of the rear longitudinal member 111 on the right front gantry 103 as the actuator installation portion are connected by a movable connecting means 156 such as a hinge.
That is, the hydraulic cylinder 151 has a cylinder side end 155 arranged on the left or right side of the pipe 2, a piston rod side end 152 arranged on the center side of the pipe 2, and a center line from the left or right side of the pipe 2. By being arranged obliquely so as to extend to the center side of the pipe 2, the space on the center side of the pipe 2 can be widened, and a sufficient space for handling the water supply / drain pipe 91, the pressure hose 23, etc. can be secured. Become.
In FIG. 1, when the piston rod 157 of the left hydraulic cylinder 151 is extended and the piston rod 157 of the right hydraulic cylinder 151 is retracted, the left end portion of the support substrate 30 moves forward and supports Since the right end portion of the substrate 30 moves to the rear side, the rotary excavation body 10 swings to the right side.
Further, in FIG. 1, when the piston rod 157 of the right hydraulic cylinder 151 is extended and the piston rod 157 of the left hydraulic cylinder 151 is retracted, the right end portion of the support substrate 30 moves forward and is supported. Since the left end portion of the substrate 30 moves to the rear side, the rotary excavation body 10 swings to the left side.

That is, the rotation center line L of the rotary excavator 10 is parallel to the upper and lower inner surfaces which are one pair of inner surfaces of the leading pipe 2A facing each other in parallel, and is perpendicular to the propulsion direction F of the leading pipe 2A. By including the left / right swing drive means 150 that is set to cross in a state other than orthogonal, the rotary excavator 10 can be swung in the left / right direction with respect to the center line 2c of the top pipe 2A. Since the natural ground 99 can be excavated in the front side of the pipe 2A with a width interval wider than the horizontal width of the top pipe 2A, when the front pipe 2A is propelled, the one-end opening 2t of the front pipe 2A becomes a hard layer of the natural ground 99. The possibility of collision is reduced, and the front pipe 2A can be smoothly driven. That is, prior to the advancement of the leading pipe 2A, a cross-sectional area wider than the sectional area of the leading pipe 2A can be excavated in front of the leading pipe 2A, and an extra moat in front of the leading pipe 2A becomes possible. Even when the natural ground is hard ground, the leading pipe 2A can be smoothly promoted in the ground.
Further, the propulsion direction of the leading pipe 2A can be adjusted to the left and right by swinging the rotary excavator 10 leftward or rightward with respect to the center line 2c of the leading pipe 2A.
Further, it is possible to cope with a case where only the right side in front of the front pipe 2A is to be excavated with priority and a case where only the left side in front of the front pipe 2A is to be excavated with priority.

In the installation work of the pipe 2 in the underground 10, the work is performed while monitoring whether or not the leading pipe 2A is moving in the direction as designed by a measuring means (not shown).
Further, when it is detected that the traveling direction of the leading pipe 2A is deviated from the planned position, the position of the rotary excavator 10 is changed after the rotary excavator 10 is swung vertically or horizontally. By continuing the operation while swinging in the vertical direction and the horizontal direction, it is possible to correct the deviation in the traveling direction of the leading pipe 2A.

In the water stop device 7, for example, one end opening edge 161 of the cylinder of the tubular water stop member 160 formed of a stretchable material such as rubber is fixed to the inner peripheral surface on the front end side (one end opening side) of the leading pipe 2 </ b> A. Then, the other end opening edge 162 of the cylinder of the cylindrical water-stopping member 160 is fixed to the outer peripheral edge 163 side of the front surface 44 of the support substrate 30, so that the cylindrical water-stop member 160 is on the front side of the support substrate 30. Is configured to prevent water from moving to the rear side of the support substrate 30.
That is, by providing the water stop device 7, when the support substrate 30 swings left and right and the rotary excavation body 10 swings left and right, the tubular water stop member 160 expands and contracts, and the support substrate 30. When the cylindrical support 31 is swung in the front-rear direction and the rotary excavator 10 is swung in the vertical direction, the intrusion of water between the tube and the tubular support 31 is prevented. By preventing water from entering between 31 and the support tube 63, movement of water from the front side of the support substrate 30 to the rear side of the support substrate 30 is prevented.

  As shown in FIG. 5, the fixing portion 165 of the one end opening edge 161 of the cylinder of the tubular water blocking member 160 is a central axis of the support pipe 63 from a position in front of the annular mounting groove 73 on the inner peripheral surface of the support pipe 63. An annular fixing portion 166 provided so as to protrude toward the front surface, a holding plate 168 that presses one end opening edge 161 against the front surface of the annular fixing portion 166, and a set screw 171. The set screw 171 includes the holding plate 168 and one end. It is configured by passing through a through hole formed in the opening edge 161 and fastening to a screw hole formed in the front surface of the annular fixing portion 166.

  The fixing portion 175 of the other end opening edge 162 of the cylindrical water-stopping member 161 includes an annular fixing portion 176 formed along the outer peripheral edge of the front surface 44 of the support substrate 30, and the other end opening edge 162 as an annular fixing portion. 176 is provided on the front surface of the annular fixing portion 176 through a through-hole formed in the holding plate 178 and the other end opening edge 162. It is configured by being fastened to the screw hole.

  That is, when the rotary excavator 10 is swung in the left-right direction, the water stop device 7 swings the rotary excavator 10 in the up-down direction when the left and right sides of the support substrate 30 swing in the front-rear direction. At this time, when the upper and lower sides of the cylindrical support 31 swing in the front-rear direction, the cylindrical water stop member 160 expands and contracts to prevent water from moving from the front side of the support substrate 30 to the rear side of the support substrate 30. It is configured as follows.

The cylindrical water-stop member 160 is dried after, for example, immersing a mold having an outer periphery corresponding to the outer peripheral shape of the cylindrical support in a rubber stock solution to adhere a thin layer of rubber to the outer peripheral surface of the mold. The above operation is repeated several times to several tens of times, and a thin rubber layer is laminated on the outer peripheral surface of the mold to form a thin rubber cylinder (thickness of about several mm).
Thus, by using a rubber cylinder formed in a cylindrical shape as the cylindrical water-stopping member 160, the elastic movement of the cylindrical support 31 and the support substrate 30 is smoothed and stopped by the expansion and contraction of the rubber cylinder. The water stop device 7 excellent in water performance can be formed.
Further, as in the prior art, a waterproof rubber or the like is provided between the outer peripheral surface of the support substrate 30 and the inner peripheral surface of the cylindrical support 31 and between the inner surface of the top tube 2A and the outer peripheral surface of the cylindrical support 31. Since the frictional resistance between the outer peripheral surface of the support substrate 30 and the inner peripheral surface of the cylindrical support 31 is reduced, the swinging operation of the cylindrical support 31 and the support substrate 30 becomes smooth.
The tubular water blocking member 160 is made of rubber having an elasticity that is not broken even when pulled by the swinging of the rotary excavating body 10, and is tubular when contracted by the swinging of the rotary excavating body 10. It is attached in a state where there is a slack (margin) so as not to be caught between the inner surface 82 of the support 31 and the outer surface 83 of the support substrate 30.
For example, the other end opening edge 162 side, which is the smaller diameter side, is formed by using the cylindrical water-stop member 160 formed so that the diameter on the one end opening edge 161 side of the cylinder is larger than the diameter on the other end opening edge 162 side of the cylinder. Is fixed to the annular fixing portion 176 formed along the outer peripheral edge side of the front surface 44 of the support substrate 30, and the one end opening edge 161 side, which is the larger diameter side, is larger in diameter than the annular fixing portion 176. The cylindrical support 31 is fixed to the annular fixing portion 166 on the inner peripheral surface side of the cylindrical excavator 10 in a state where it is not easily broken even when pulled by the swing of the rotary excavator 10 and is contracted by the swing of the rotary excavator 10. It is possible to configure a water stop portion that is configured so as not to be caught between the inner surface 82 and the outer surface 83 of the support substrate 30.
That is, the other end opening edge 162 side which is the small diameter side of the cylindrical water blocking member 160 is fixed to the support body 14, and the one end opening edge 161 side which is the large diameter side of the cylindrical water stopping member 160 is the leading pipe 2A. By fixing to the inner peripheral surface of the rotary excavator 10, a water-stop portion is configured that is difficult to tear even when pulled by the swing of the rotary excavator 10 and that does not loosen too much when the rotary excavator 10 is contracted by the swing of the rotary excavator 10. It becomes possible.

  By providing the water stop device 7, regardless of the state of the support substrate 30, the muddy water including the excavation gap taken into the front surface 44 side of the support substrate 30 is in contact with the outer peripheral surface of the support substrate 30 and the cylindrical support 31. It is possible to prevent the rearward movement of the support substrate 30 via the inner peripheral surface of the support substrate 30 and the mud containing the excavation slip taken in the front surface 44 side of the support substrate 30 and the outer peripheral surface of the cylindrical support 31. It is possible to prevent movement to the rear of the support substrate 30 via the space between the inner peripheral surface of the leading pipe 2A.

  Moreover, since the other end opening edge 164 side of the cylinder of the cylindrical water blocking member 161 is fixed to the outer peripheral edge 163 side of the front surface 44 of the support substrate 30, a large amount of excavation gap can be taken in front of the front surface 44 of the support substrate 30. Therefore, the efficiency of drainage can be improved.

As shown in FIG. 1, the propulsion device 5 is transmitted to the cylindrical support 31, a propulsion drive source (not shown), propulsive force transmission means 200 that transmits the propulsive force generated by the propulsion drive source to the cylindrical support 31, and the cylindrical support 31. The tube side support portion 32 is provided as a propulsion force receiving portion that transmits the propulsive force to the leading tube 2A.
That is, by transmitting the propulsive force from the propulsion drive source to the cylindrical support 31 via the propulsive force transmitting means 200 and rotating the rotary excavator 10, the rotary excavator 10 is propelled forward and the cylindrical The propulsive force transmitted to the support 31 is transmitted to the leading pipe 2A through the propelling force receiving portion, and the leading pipe 2A propels forward.

The propulsion drive source is constituted by, for example, a hydraulic cylinder as an actuator.
The tube-side support portion 32 as a propulsive force receiving portion is configured by a concave wall 70 of a concave groove 68 that receives a columnar protrusion 66 provided on the left and right outer surfaces of the cylindrical support 31.

The propulsive force transmission means 200 includes a propulsive force transmission component 201, a propulsive force transmission rod 202, and a buckling prevention member 203.
The propulsive force transmission configuration unit 201 is configured by the actuator installation unit 102 described above, for example.
The propulsive force transmission rod-like body 202 has a configuration in which, for example, connecting flanges 204; 204 are provided at both ends of an H-shaped steel.

As shown in FIG. 7, the buckling prevention member 203 is a member that prevents buckling of the propulsive force transmission rod-like body 202, and is formed in the left-right direction (the left and right inner surfaces of the succeeding pipe 2B (the other facing the other of the succeeding pipe 2B). Of the left and right propelling force transmitting rods 202; connecting the left and right propelling force transmitting rods 202; and the left propelling force transmitting rod 202 It is in contact with the left propulsive force transmission rod 202 on the inner side and extends in the vertical direction (a direction perpendicular to or intersecting with the upper and lower inner surfaces of the subsequent tube 2B (one pair of inner surfaces facing each other of the subsequent tube 2B)). A left elongated portion 206 that is provided and connected to the left end side of the left and right connecting rods 205 and the right propulsive force transmitting rod 202 in contact with the right propelling rods 202 to extend vertically. Provided in A right vertical portion 207 connected to the right end side of the left and right connecting rods 205, an upper left and right connecting rod 208 connecting the upper end portion of the left vertical portion 206 and the upper end portion of the right vertical portion 207, and the left vertical portion 206. Lower left and right connecting rod-like bodies 209 that connect the lower end portion and the lower end portion of the right-side vertically elongated portion 207, and the left and right connecting rod-like bodies 205 provided at the left and right ends of the left and right connecting rod-like bodies 205, and the subsequent Left and right interference reducing members 210; 210 that reduce interference with the left and right inner surfaces of the pipe 2B, and left and right vertical portions provided at both upper and lower ends of the left and right vertical portions 206 and 207 at the time of recovery to the starting base 206, a right vertically long portion 207, an upper left and right connecting rod-like body 208, a lower left and right connecting rod-like body 209, and upper and lower interference reducing members 211 and 211 for reducing interference between the upper and lower inner surfaces of the subsequent pipe 2B. . In addition, each member which comprises the buckling prevention member 203 is formed, for example with a shape steel.
By providing the buckling prevention member 203, the right and left propulsive force transmission rod-like bodies 202, 202 connected to the rotary excavation body support portion 12 by being connected to the rear end of the actuator installation portion 102 are propulsion drive sources. When the thrust from the hydraulic cylinder is applied, the buckling prevention member 203 or the buckling prevention member 203 in contact with the inner surface of the succeeding pipe 2B buckles the left and right thrust transmission rods 202, 202. By resisting the force to be caused, buckling of the left and right propulsive force transmission rods 202, 202 can be prevented, and the propulsive force applied by the hydraulic cylinder is transmitted to the propulsive force transmission component 201 (actuator installation unit). 102) can be reliably transmitted to the rotary excavator 10 and the top pipe 2A.

  The left and right interference reducing members 210; 210 and the upper and lower interference reducing members 211; 211 include an outer surface 212 formed in a curved shape, and the curved outer surface 212 is provided so as to face the inner surface of the subsequent pipe 2B. It is done. The left and right interference reducing members 210; 210 and the upper and lower interference reducing members 211; 211 are formed in a curved shape in which both end sides of the steel plate are bent in the same direction as shown in FIG. 7, for example. It arrange | positions so that the inner surface of the succeeding pipe | tube 2B may be opposed. Therefore, by bringing the curved outer surface 212 into contact with the inner surface of the succeeding pipe 2B, it becomes possible to reduce the frictional resistance at the time of recovery for recovering the propulsive force transmitting rod 202 to the starting base, and the propulsive force transmitting rod The collection work for returning 202 to the departure base can be easily performed.

The water supply / drainage device 6 includes two water supply / drainage pipes 91; 91, a water storage tank (not shown), a water supply pump (not shown) for supplying water from the water storage tank to the water supply / drainage pipe, and a wastewater mud (not shown). A tank and an unillustrated pump for drained mud water that sucks the discharged mud through a water supply / drain pipe and discharges it into the mud tank.
That is, by connecting one of the water supply / drainage pipes 91 and the water supply pump to drive the water supply pump and supplying water to one of the water supply / drainage pipes 91, the front space of the support substrate 30 is pressurized, The muddy water in the front space of the support substrate 30 is discharged to the muddy tank by connecting the water supply / drain pipe 91 and the muddy water pump to drive the muddy water pump.
Further, by connecting the other water supply / drain pipe 91 and the water supply pump to drive the water supply pump to supply water to the other water supply / drain pipe 91, the front space of the support substrate 30 is pressurized, The muddy water in the front space of the support substrate 30 is discharged to the muddy tank by connecting the water supply / drain pipe 91 and the muddy water pump to drive the muddy water pump.
That is, one of the water supply / drainage pipes 91 is used as a water supply pipe or as a mud drainage pipe, and the other water supply / drainage pipe 91 is used as a drainage mud water pipe or as a water supply pipe. That is, by using the two water supply / drain pipes 91; 91 as a water supply pipe or a mud drain pipe as appropriate, the mud water is prevented from being unevenly distributed in the front space of the support substrate 30. Thus, the movement of the support substrate 30 and the cylindrical support 31 during swinging and the movement of the support substrate 30 and the cylindrical support 31 during propulsion are not hindered.

Next, a method for installing the pipe 2 in the ground by the pipe installation device 1 will be described.
First, the excavating machine 4 is set on the top pipe 2A. For example, an assembly in which the cylindrical support 31, the support substrate 30, and the connection frame 34 are assembled is inserted from the rear end opening of the top tube 2 </ b> A, and the left and right columnar protrusions 66; 66 of the cylindrical support 31 are inserted. By inserting it into the left and right concave grooves 68; 68 of the support pipe 63, it is set in the leading pipe 2A.
Note that when the left and right curved convex surfaces of the support substrate 30 are configured to slide with the left and right curved concave surfaces of the cylindrical support 31, the cylindrical support 31 includes, for example, separate left side plates, right side plates, and upper plates. And the lower plate are connected by welding or the like. That is, the upper and lower circular protrusions 86; 86 of the support substrate 30 are inserted into the circular holes 87; 87 formed in the upper and lower plates of the cylindrical support 31, and the left side of the cylindrical support 31 is inserted. The upper end of the left side plate of the cylindrical support 31 and the upper plate are connected by welding or the like while the curved concave surface of the plate is in contact with the left curved convex surface of the support substrate 30, and the lower end of the left side plate of the cylindrical support 31 is connected. Connect the lower plate by welding. Similarly, the upper end of the right side plate and the upper plate of the cylindrical support 31 are connected by welding or the like while the curved concave surface of the right side plate of the cylindrical support 31 is in contact with the right curved convex surface of the support substrate 30. The lower end of the right side plate of the cylindrical support 31 and the lower plate are connected by welding or the like. Thus, an assembly in which the support substrate 30 is assembled inside the cylindrical support 31 is formed.

After the assembly of the cylindrical support 31, the support substrate 30, and the connection frame 34 is set on the top pipe 2 </ b> A, the column unit 33 of the rotary excavation body 10 is connected to the connection frame 34 to support the rotary excavation body 10. The external pressure-resistant hose 23 is connected to the connection portion 23 </ b> A provided at the rear end opening of the hollow support portion 35, connected to the front surface of the substrate 30. Further, the one end opening edge 161 of the cylindrical water-stopping member 160 is fixed to the inner peripheral surface on the distal end side (one end opening 2t side) of the leading pipe 2A, and the other end opening edge 162 of the cylindrical water-stopping member 160 is fixed to the support substrate. The water stop device 7 is configured by being fixed to the outer peripheral edge 163 side of the front surface 44 of 30. Further, the actuator installation portion 102 in which the hydraulic cylinder 101 and the hydraulic cylinder 151 are installed is connected to the rear end surface 106 of the cylindrical support 31, and the piston rod side end portion 152 of the hydraulic cylinder 151 is connected to the rear surface 153 of the support substrate 30. It connects via the connection means 154, and connects the water supply / drain pipe 91 to the pipe holding through hole 90 of the support substrate 30. Then, the pressure hose 23 is connected to a hydraulic pressure source, and the water supply / drain pipe 91 is connected to the pump.
Thus, the start preparation for the leading pipe 2A is completed.

  The excavator 3 is assembled by inserting the left and right cylindrical protrusions 66; 66 of the cylindrical support 31 of the excavator 3 into the left and right concave grooves 68; 68 of the support pipe 63 after the entire excavator 3 is assembled. May be set in the leading pipe 2A.

  Next, the rotary excavator 10 and the left and right connecting flanges 120; 120 positioned at the rear end of the actuator installation unit 102 are pressed by hydraulic cylinders as propulsion drive sources, and the rotary excavator 10 is rotated. The head pipe 2A is propelled from the starting base into the ground. That is, a natural ground is excavated by the rotation of the rotary excavating body 10 and the actuator installation portion 102 is pressed, so that the propulsive force generated by the pressing by the hydraulic cylinder causes the actuator installation portion 102 (propulsion transmission component 201). , The cylindrical support 31, the columnar protrusion 66, and the concave wall 70 (tube side support portion 32) are transmitted to the leading pipe 2 A, and the actuator installation portion 102, the cylindrical support 31, and the support substrate connection frame 34. Since it is transmitted to the rotary excavation body 10 through the strut 33 of the rotary excavation body 10, the leading pipe 2A advances into the ground.

Then, before the leading pipe 2A travels completely into the ground, the trailing pipe 2B is connected to the rear end of the leading pipe 2A in the departure base.
Further, while the left and right connecting flanges 120; 120 located at the rear end of the actuator installation portion 102 protrude rearward from the rear end opening of the succeeding pipe 2B, the right and left connecting flanges are respectively provided with propulsive force transmission rods. The body 202 is connected. Then, the front pipe 2A and the subsequent pipe 2B are further advanced by pressing the left and right connecting flanges 204; 204 positioned at the rear end of each propulsive force transmission rod-like body 202 with each hydraulic cylinder. Then, before the subsequent pipe 2B travels completely into the ground, the subsequent subsequent pipe 2B is further connected to the rear end of the subsequent pipe 2B in the departure base.

  Thereafter, while the left and right connecting flanges 204; 2401 positioned at the rear end of each propulsive force transmission rod-like body 202 protrude rearward from the rear end opening of the succeeding pipe 2B, the left and right connecting flanges 204; 204 Are connected to the propulsive force transmission rod-like body 202, the rearmost propulsive force transmission rod-like body 202 is pressed to further advance the leading pipe 2A and the succeeding pipe 2B, and the rearmost succeeding pipe 2B is completely underground. 2, by repeating the operation of connecting the succeeding subsequent pipe 2B to the rear end of the rearmost succeeding pipe 2B in the departure base, the leading pipe 2A and the plurality of succeeding pipes 2B following the leading pipe 2A are repeated. For example, a pipe body that functions as a support work or the like can be installed in the ground.

After the pipe installation work is completed, the excavating machine 4 and the like are pulled back to the starting base and collected. At this time, since the rotary excavator 10 is slowly rotated before the recovery operation of the rotary excavator 10 is performed, the detection means 8 can detect that the rotary excavator 10 is in a recoverable state. 4 and the like can be collected quickly and accurately.
In addition, when the rotary excavation body 10 reaches | attains the arrival base outside a figure, after cut | disconnecting the cylindrical water stop member 160 in the said arrival base, the excavation machine 4 etc. are pulled back to a start base, and are collect | recovered. Further, when the excavating machine 4 and the like are pulled back from the ground to the starting base and collected in a state where the rotary excavator 10 does not reach the arrival base (not shown), the tubular water blocking member 160 is used when the excavating machine 4 and the like are pulled back. It is made to break by pulling (removing) and collecting.

Embodiment 2
The buckling prevention member is provided to extend in the vertical direction and is connected to the left propulsive force transmission rod-like body, and the left longitudinally extending portion is provided to extend in the vertical direction and is provided with the right propulsive force transmission rod-like body. A right and left connecting rod-like body that connects the connected right-side vertically elongated portion, the left-side vertically elongated portion and the right-side vertically elongated portion, or a left-side propulsive force transmitting rod-shaped body and a right-side propulsive force transmitting rod-shaped body; It is good also as a structure provided with.
That is, the left vertical portion 206 shown in FIG. 7 is connected to the left propulsive force transmission rod 202, the right vertical portion 207 is connected to the left propulsion transmission rod 202, and the left vertical portion 206 is connected. It is good also as a structure provided with the buckling prevention member which has the right-and-left connection rod-shaped body which connects the right-side vertically long part 207, or the right-and-left driving force transmission rod-shaped body 202;
Even when the buckling prevention member of the second embodiment is provided, it is possible to prevent buckling of the propulsive force transmitting rod 202 when the propulsive force from the propulsion driving source is applied to the left and right propulsive force transmitting rod 202; 202. Thus, the propulsive force applied by the propulsion drive source can be reliably transmitted to the rotary excavator 10 and the top pipe 2A.

Embodiment 3
The interference reduction member is provided so as to protrude toward the left inner surface side of the pipe from the left propelling force transmission rod-shaped body, and the left propulsive force transmission rod-shaped body and the left inner surface of the pipe at the time of recovery to the starting base. A left interference reducing member for reducing interference, and a right propulsive force transmitting rod-shaped member provided so as to protrude toward the right inner surface side of the pipe rather than the right propelling force transmitting rod-shaped member at the time of recovery to the starting base; It is good also as a structure provided with the right interference reduction member which reduces interference with the right inner surface of a pipe | tube.
That is, the left thrust reducing member 210 shown in FIG. 7 is protruded from the left thrust transmitting rod 202 toward the left inner surface of the succeeding tube 2B, or the left thrust transmitting rod 202 or the left The right propulsive force transmitting rod-shaped body provided on the vertically long portion 206 and projecting the right interference reducing member 210 shown in FIG. 7 from the right propelling force transmitting rod-shaped body 202 toward the right inner surface side of the succeeding pipe 2B. It is good also as a structure provided in 202 or the right longitudinally long part 207.
Even when the interference reducing member according to the third embodiment is provided, it is possible to reduce the frictional resistance at the time of recovery for recovering the propulsive force transmission rod-shaped body 202 to the starting base, and the recovery work for returning the propulsive force transmitting rod-shaped body 202 to the starting base. Can be easily performed.

Embodiment 4
The buckling prevention member 203 may be provided with one buckling prevention member 203 on the thrust transmission rod 202 each time the subsequent thrust transmission rod 202 is connected. One buckling prevention member 203 may be provided every time a plurality of 202 are connected. For example, one buckling prevention member 203 may be provided each time two subsequent propulsive force transmission rod-like bodies 202 are connected.
In addition, the shape, material, and the like of the buckling prevention member 203 are not particularly limited as long as the rigidity of the propulsive force transmission rod 202 can be improved.
Further, the propulsive force transmission medium may not be a rod-shaped body.

  In the above description, the front surface of the annular fixing portion 166 provided on the inner peripheral surface of the leading pipe 2A is regarded as the inner peripheral surface of the leading pipe 2A, and the tubular water blocking member 160 is disposed on the front surface of the annular fixing portion 166. Although the example which fixed the one end opening edge 161 was shown, you may fix the one end opening edge 161 of the cylindrical water stop member 160 directly to the inner peripheral surface of 2 A of top pipes, without providing the annular fixing part 166.

  Further, this is a configuration in which the rotary excavator is not swingable in the vertical direction and the horizontal direction, that is, the structure in which the propulsive force by the propulsion device is transmitted to the top pipe through the propulsive force transmission rod-like body and the support substrate. However, the one end opening edge 161 of the cylindrical water-stopping member 160 is fixed to the inner peripheral surface on the distal end side of the leading pipe 2A, and the other end opening edge 162 of the cylindrical water-stopping member 160 is fixed to the front surface of the support substrate. Thus, it is possible for the tubular water stop member 160 to constitute a water stop device that prevents movement of water from the front side of the support substrate to the rear side of the support substrate.

  In the embodiment, the detection sensor 8 using the magnet 51 and the Hall IC 52 is exemplified as the detection means 8 for detecting that the rotary excavation body 10 is in a recoverable state. The detection means of the method may be used.

  In the embodiment, the shaft 123 includes the pin 123 and the pin 124, and the upper long hole 121 and the lower long hole 122. The pin 123 and the pin 124 pass through the upper long hole 121 and the lower long hole 122. The structure connected so as to be movable, that is, the structure having two connecting parts in which the pin and the long hole are connected is exemplified, but the connecting part in which the pin and the long hole are connected is one or more. I just need it.

  In addition, you may use the excavation machine 4 provided with the rotary excavation body 10 or 3 or more.

  Moreover, the pipe | tube 2 should just be a thing with a square cross-sectional shape. In addition, the cross-sectional shape referred to in the present invention is a quadrangular shape such as a cross-sectional rectangle, a cross-sectional square, and a cross-sectional trapezoid, and includes a shape in which square corners are chamfered.

Also, do not connect the following pipe to the rear end of the pipe that goes into the ground first, and install only the pipe that goes into the ground first from the starting base in the ground and only the pipe that goes into the ground before that (that is, A support work or the like by a single pipe may be formed.
Further, the left and right sides of the leading pipe 2A may be propelled in the vertical direction.
Moreover, it is good also as a pipe | tube installation apparatus of the structure which makes the support substrate 30 rock | fluctuate in an up-down direction, and rocks the cylindrical support body 31 in the left-right direction.

1 pipe installation device, 2 pipes, 2A leading pipe (pipe), 2B following pipe (pipe),
2t One end opening of the top pipe, 10 rotary excavator, 12 rotary excavator support,
202 propulsion force transmission rod (propulsion force transmission medium), 203 buckling prevention member,
205 Left and right connecting rods, 206 Left vertical part, 207 Right vertical part,
208 Upper left and right connecting rods, 209 Lower left and right connecting rods,
210; 210 left and right interference reducing members; 211; 211 upper and lower interference reducing members;
L Rotation center line.

Claims (6)

A pipe having a square cross section, a rotating excavator that is positioned on one end opening side of the pipe and that rotates around a rotation center line that intersects the propulsion direction of the pipe, and that rotatably supports the rotary excavator and on the inner surface of the pipe A supported rotary excavator support, a propulsion drive source, and a propulsive force transmission medium;
In the pipe installation device for propelling the pipe and installing it in the ground by applying the propulsive force from the propulsion drive source to the rotary excavation body and the pipe via the propulsive force transmission medium and the rotary excavation body support,
A tube installation device characterized in that a buckling prevention member for preventing buckling of the thrust transmission medium is provided on the thrust transmission medium. The propulsive force transmission medium is formed by a pair of propulsive force transmission rods arranged on the left and right,
The buckling prevention member is provided to extend in the vertical direction and is connected to the left propulsive force transmission rod-like body, and the left longitudinally extending portion is provided to extend in the vertical direction and is provided with the right propulsive force transmission rod-like body. A right and left connecting rod-like body that connects the connected right-side vertically elongated portion, the left-side vertically elongated portion and the right-side vertically elongated portion, or a left-side propulsive force transmitting rod-shaped body and a right-side propulsive force transmitting rod-shaped body; The tube installation device according to claim 1, further comprising: The propulsive force transmission medium is formed by a pair of propulsive force transmission rods arranged on the left and right,
The buckling prevention member extends in the vertical direction in contact with the left propulsion force transmission rod-shaped body inside the left propulsion force transmission rod-shaped body and the left and right coupling rod-shaped members that connect the left and right propulsive force transmission rod-shaped bodies. Provided on the left end side of the left and right connecting rod-like bodies and in contact with the right propulsive force transmitting rod-like body inside the right propelling force transmitting rod-like body and extending vertically. The right vertical portion connected to the right end of the left and right connecting rods, the upper left and right connecting rods connecting the upper end of the left vertical portion and the upper end of the right vertical portion, the lower end of the left vertical portion and the right vertical The pipe installation device according to claim 1, further comprising a lower left and right connecting rod-like body that connects a lower end portion of the portion.   Left to reduce the interference between the left thrust transmission rod and the left inner surface of the tube at the time of recovery to the starting base, provided to protrude toward the left inner surface of the tube than the left thrust transmission rod An interference reducing member, a right propelling force transmission rod-shaped body and a right propelling force transmitting rod-shaped body and a right inner surface of the tube, which are provided so as to protrude toward the right inner surface side of the tube from the right propulsive force transmitting rod-shaped body. The pipe installation device according to claim 2, further comprising a right interference reduction member that reduces the interference of the right interference reduction member.   The buckling prevention members are provided at the left and right ends of the left and right connecting rod-like bodies to reduce the interference between the left and right connecting rod-like bodies and the left and right inner surfaces of the pipe at the time of recovery to the departure base, and the left longitudinally long Interference between the left and right vertical portions, the right and left vertical portions, the upper left and right connecting rods, the lower left and right connecting rods, and the upper and lower inner surfaces of the pipes at the time of recovery to the departure base. The pipe installation device according to claim 3, further comprising an upper and lower interference reducing member that reduces the amount of interference.   The tube installation device according to claim 4 or 5, wherein the interference reducing member includes an outer surface formed in a curved shape, and the curved outer surface is provided so as to face an inner surface of the tube. .