JP5826602B2 - Pipe installation device - Google Patents

Description

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

Conventionally, it is a pipe installation device for installing a pipe having a square cross section in the ground, and a rotary excavator that rotates around a rotation center line orthogonal to the propulsion direction of the pipe is provided inside the front side of the pipe. A pipe installation device is known (see, for example, Patent Document 1).
In addition, as a pipe installation device for installing a curved pipe with a circular cross section (a pipe whose center line is a curved line) in the ground, a rotation center line along the propulsion direction of the curved pipe is provided on the leading side of the curved pipe. 2. Description of the Related Art A pipe installation device is known that includes a cutter head that rotates as a rotation center, and that can swing the cutter head with the rotation center line of the cutter head intersecting the propulsion direction of the curved pipe (for example, Patent Documents) (See 2nd grade).

JP 2011-52528 A JP 2005-1555056 A

However, in the pipe installation device disclosed in Patent Document 1, when the ground is a hard ground, the tip of the top pipe sometimes collides with the hard ground and does not advance.
Further, in the pipe installation device of Patent Document 2, since the outer peripheral surface of the cutter head is supported by the support member so that the cutter head can rotate, the contact support structure between the outer peripheral surface of the cutter head and the support member is highly accurate. A sliding device is required, and the contact portion between the support member and the cutter head in the sliding device is likely to be worn, and there are problems in terms of durability and cost.
Furthermore, when it is going to employ | adopt the contact support structure of the pipe installation apparatus of patent document 2 to the pipe installation apparatus of patent document 1, not only the above-mentioned problems of durability and cost but also rotation of the pipe installation apparatus of patent document 1 Since the direction of the rotation center line of the excavated body and the direction of the rotation center line of the cutter head of the pipe installation device of Patent Document 2 are different, the contact support structure for the pipe installation device of Patent Document 2 is added to the pipe installation device of Patent Document 1. Even if it is adopted, it is not configured to excavate a cross-sectional area that is wider than the cross-sectional area of the pipe in front of the pipe before the progress of the pipe, and the tip of the top pipe collides with the hard ground and does not advance The problem cannot be solved.
The present invention includes a rotary excavator that rotates about a rotation center line orthogonal to the propulsion direction of the pipe on the leading side of the pipe, and is wider than the cross-sectional area of the pipe in front of the pipe prior to the progress of the pipe. An object of the present invention is to provide a pipe installation device that can excavate a cross-sectional area and can smoothly promote a pipe in the ground even when a natural ground is hard ground.

According to the present invention, when a pipe having a square cross section is installed in the ground from a hollow portion formed in the ground, a surface orthogonal to the propulsion direction of the pipe in front of the top opening of the pipe to be put in the ground first. In a pipe installation device that installs a rotary excavator that rotates around a rotation center line parallel to the axis of rotation, advances the pipe and excavates the ground with the rotary excavator, thereby propelling the pipe and installing it in the ground , A sphere with a rotating excavator fixed to the column, a sphere rotation guide member installed inside the top opening side of the pipe to hold the sphere rotatably about the center of the sphere, and a sphere rotation guide member And a propulsive force transmitting component that transmits propulsive force to the spherical rotation guide member, and fixed to the inner surface of the top opening side of the tube to restrict the forward movement of the spherical rotation guide member and transmitted to the spherical rotation guide member. The propulsive force transmitted to the pipe Rotating the first rotation center line extending so as to intersect with the other pair of wall surfaces parallel to each other and parallel to one pair of wall surfaces of the tube opposite to each other comprises a first guiding jacks turn the sphere around, and a second guiding jack turning sphere as the center of rotation parallel second rotational axis and the rotation center line of the rotary drilling member, a first induction of One end of the jack is connected to the propulsive force transmission component and the other end is connected to the sphere, and the second guide jack is connected to the propulsion force transmission component and the other end is a spherical surface of the sphere. Since the upper end and the lower end projecting more are pressed, it is possible to excavate natural ground with a cross-sectional area wider than the cross-sectional area of the pipe in front of the pipe before the pipe advances. Because it is possible to make a moat in front of The tube even if a hard ground can provide a tube installation device capable of propelling smoothly in the ground.
Further, according to the present invention, when a pipe having a quadrangular cross section is installed in the ground from the hollow portion formed in the ground, it is orthogonal to the propulsion direction of the pipe in front of the top opening of the pipe that is first placed in the ground. Install a rotating excavator that rotates around the rotation center line parallel to the surface to be rotated, and advance the pipe while excavating the underground with the rotating excavator to install the pipe to be installed in the ground In the apparatus, a sphere in which a column of a rotary excavator is fixed, a sphere rotation guide member that is installed on the inner side of the top opening side of the pipe and holds the sphere rotatably about the center of the sphere, Since the spherical drive means for turning the sphere with the third rotation center line parallel to the center line of the tube as the rotation center is provided as the spherical drive means for turning the center as the rotation center, the width is larger than the cross-sectional area of the tube in front of the tube. You can drill natural ground with a wide cross-sectional area Since, the natural ground can be provided a pipe installation apparatus capable of propelling smoothly in underground tubes even when it is hard ground.

A cross-sectional view of a pipe installation device (embodiment 1). Exploded perspective view of excavating machine swing drive device (Embodiment 1) Perspective view of excavating machine swing drive device (Embodiment 1) The perspective view which shows the internal structure of a top pipe (embodiment 1). Longitudinal sectional view of pipe installation device (Embodiment 1) The figure which looked at the rear surface side of the spherical body rotation guide member from the back side (AA cross-section equivalent view of FIG. 2) (Embodiment 1). The figure which shows the left-right rocking | fluctuation state of a rotary excavation body (Embodiment 1). The figure which shows the up-and-down rocking | fluctuation state of a rotary excavation body (Embodiment 1). The figure which shows the installation method of the pipe | tube in the ground (Embodiment 1). Sectional drawing which shows the example of the support construction constructed | assembled by the pipe installation method which installs a straight pipe (embodiment 1). Sectional drawing which shows the example of the support construction constructed | assembled by the pipe installation method which installs a curved pipe (Embodiment 1). Sectional drawing of a pipe | tube installation apparatus (Embodiment 6). (A) is the perspective view which showed the head part of the head pipe, (b) Sectional drawing which shows the relationship between a pair of 2nd excavation bit groups (Embodiment 6). (A) is a figure which shows the state at the time of excavation of a rotary excavation body, (b) is a figure which shows the attitude | position state at the time of collection | recovery of a rotary excavation body (Embodiment 6).

Embodiment 1
Based on FIG. 1 thru | or FIG. 11, the basic composition and operation | movement of the pipe installation apparatus 1 for implement | achieving the pipe installation method in the underground by Embodiment 1 are demonstrated.
As shown in FIG. 1, the pipe installation device 1 includes a pipe 2, a drilling device 3, and a control device 65. In the following, the upper side in FIG. 1 is defined as the head or front side of the tube 2 or the tube installation device 1, the lower side in FIG. 1 is defined as the rear side of the tube 2 or the tube installation device 1, and the left and right sides in FIG. The left and right sides of the tube 2 and the tube installation device 1 are defined, and the upper and lower sides in the direction orthogonal to the paper surface of FIG.

The pipe 2 is a curved pipe formed so as to bend and extend so as to draw an arc as shown in FIG. 9; FIG. 11, or as shown in FIG. A tube that extends straight (a tube whose center line is a straight line (hereinafter referred to as a straight tube)) and has a square cross section when the tube is cut along a plane perpendicular to the center line of the tube. It is formed by. As the pipe 2, for example, a steel pipe is used. The size of the tube 2 is, for example, a tube length (front-rear length) of 1.5 m, a left-right width of 1.2 m, and a vertical width of 0.7 m.
Then, as shown in FIG. 9; FIG. 11, a support work 11 that is bent and extended so as to draw an arc is constructed in the underground 10 by connecting a plurality of bent pipes in order and installing them in the underground 10. As shown in FIG. 10, a support work 11 is constructed in the underground 10 that is straightly extended by connecting a plurality of straight pipes in order and installed in the underground 10.
As shown in FIG. 9, the support 11 constructed in the ground by the pipe installation device 1 and the pipe installation method according to the first embodiment includes a pipe 2 (hereinafter referred to as a top pipe) positioned at the head and a plurality of subsequent pipes. It is formed by the tube 2 (hereinafter, referred to as a subsequent tube). That is, the supporting work 11 is a continuous curved pipe formed by a leading pipe 6 which is a curved pipe located at the leading end and a succeeding pipe 7 which is a plurality of succeeding curved pipes provided so as to follow the leading pipe 6. 67.
As shown in FIG. 11 (a), the support work 11 includes a plurality of bends as a plurality of pipes 2 so as to straddle between one cavity 100 formed in the ground 10 and the other cavity 100. As shown in FIG. 11 (b), a plurality of pipes 2 starting from a cavity 100 formed in the ground 10 and returning to the cavity 100 as shown in FIG. As shown in FIG. 10, a plurality of support pipes 11 constructed by continuously connecting a plurality of bent pipes, and a plurality of pipes 2 as a plurality of pipes 2 so as to straddle between one cavity 100 and the other cavity 100. There is a support 11 constructed by installing straight pipes continuously.

As shown in FIG. 1, the excavating device 3 includes an excavating machine 26, an excavating machine swing drive device 25, a control device 65, a propulsion device 70, a water supply device 75, and a mud drain device 76. .
The excavating machine swing drive device 25 includes a sphere 30, a sphere rotation guide member 31, and a sphere drive means 32.

The excavation apparatus 3 according to the first embodiment is installed inside the sphere 30 to which the rotary excavator 46 is fixed and the front opening 6t side of the top pipe 6 and holds the sphere 30 so that the center of the sphere 30 can be rotated about the center of rotation. The spherical rotation guide member 31 and the pair of inner walls of the leading pipe 6 facing each other in parallel (for example, the left and right inner wall surfaces 6a; 6b of the leading pipe 6) and the leading pipes 6 are opposed to each other in parallel. A spherical rotation center axis 30a (first rotation center line) extending so as to intersect with the other pair of inner wall surfaces (for example, upper and lower inner wall surfaces 6c; 6d) of the leading tube 6 and the leading tube 6 are parallel to each other. The sphere 30 with the sphere rotation center line 30b (second rotation center line) extending so as to be orthogonal to the pair of opposing inner wall surfaces and the sphere rotation center axis 30a (first rotation center line) as the rotation center. Sphere driving means 3 for turning It comprises excavating machine rocking mechanism 25 having the a.
The excavating machine swing drive device 25 is installed in a state where the spherical rotation guide member 31 is restricted from moving forward on the inner side of the leading opening 6 t of the leading pipe 6, and the column 42 of the rotating excavating body 46 is attached to the spherical body 30. The sphere 30 is fixed and held by the sphere rotation guide member 31 so that the sphere 30 can rotate around the center of the sphere 30, and the sphere driving means 32 moves the sphere 30 around the center of the sphere 30 as the center of rotation. The rotary excavator 46 fixed to the sphere 30 via the support column 42 is configured to swing in the left-right direction or the vertical direction of the top tube 6 in front of the top tube 6 by rotating in the front-rear direction.
In other words, the excavating machine rocking drive device 25 includes a pair of inner wall surfaces (for example, the top surface) where the rotation center line L of the rotary excavation body 46 is perpendicular to the propulsion direction of the top pipe 6 and the top pipe 6 faces each other in parallel. The first state parallel to the upper and lower inner wall surfaces 6c; 6d) of the pipe 6, or the rotation center line L of the rotary excavator 46 is parallel to the pair of inner wall surfaces of the leading pipe 6 facing each other in parallel and the leading edge A second state (a state in which the rotary excavator 46 swings left and right) intersecting with a plane orthogonal to the propulsion direction of the pipe 6 in a state other than orthogonal, or the rotational center line L of the rotary excavator 46 is mutually aligned with the leading pipe 6. A third state of moving in a direction perpendicular to the pair of inner wall surfaces of the top tube 6 while maintaining a state parallel to a pair of parallel inner wall surfaces (for example, the upper and lower inner wall surfaces 6c; 6d) of the head tube 6 Set freely so that (the rotary excavator 46 swings up and down) Door provided with a configuration capable.

The sphere 30 has a sphere rotation center axis 30 a (see FIG. 4) through which the upper and lower ends protrude from the spherical surface of the sphere 30 through the center of the sphere 30. The sphere rotation center shaft 30a is housed in a shaft housing portion 34 (to be described later) of the sphere rotation guide member 31 so that the shaft is parallel to the left and right inner wall surfaces 6a; Installed to extend, and on the plane parallel to the left and right inner wall surfaces 6a; 6b of the leading tube 6, the upper and lower ends of the shaft can swing in the front-rear direction of the leading tube 6 with the center point of the shaft as the center of rotation. Installed. The sphere 30 is housed in a sphere housing portion (described later) of the sphere rotation guide member 31 so that the sphere 30 can rotate in the left-right direction of the top tube 6 around the sphere rotation center axis 30a. It is configured to be able to rotate in the front-rear direction of the top tube 6 with the center of rotation as a center of rotation on a spherical rotation center line 30b orthogonal to the left and right inner wall surfaces 6a;
The sphere 30 includes a column support through-hole 13 formed so as to pass through the sphere 30 through the center of the sphere 30 and perpendicular to the sphere rotation center axis 30a and the sphere rotation center line 30b.
The struts 42 of the rotary excavator 46 pass through the strut support through holes 13 so that the two branch struts 43; 43 to which the rotary excavator 46 is attached are orthogonal to the left and right inner wall surfaces 6a; 6b of the top pipe 6. It is fixed to the sphere 30 in a penetrating state. For example, as shown in FIGS. 1 and 2, the periphery of the front opening of the column support through-hole 13 of the sphere 30 is formed in a mounting plane 30 c orthogonal to the center line of the column support through-hole 13. The fixing rod 42x having the mounting plane 42c that contacts the 30c is formed, and the mounting plane 42c of the fixing rod 42x and the sphere in a state where the rear end of the column 42 passes through the column support through hole 13 and protrudes rearward of the sphere 30 30 mounting planes 30c are attached to each other, and the mounting plane 42c of the fixing rod 42x and the mounting plane 30c of the spherical body 30 are fixed by fixing means such as welding or fixing bolts.

The spherical rotation guide member 31 is formed on a rectangular flat plate 31x having an outer peripheral dimension that is substantially the same as the rectangular inner peripheral dimension of the cross section of the top tube 6 (cross section orthogonal to the center line of the top tube 6). The shaft housing 34, the sludge pipe holding through hole 14 (see FIG. 4), and the water supply pipe holding through hole 15 (see FIG. 4) are formed.
A watertight performance maintaining member 31b such as rubber packing is provided on the outer peripheral surface 31a of the flat plate 31x of the spherical rotation guide member 31 so as to go around the outer peripheral surface 31a, and the outer peripheral surface 31a of the flat plate 31x and the inner periphery of the top tube 6 are provided. The surface 6x is opposed to the surface 6x with a slight gap of about several mm (for example, 5 mm), and the watertight performance maintaining member 31b and the inner peripheral surface 6x of the top tube 6 are in contact with each other, so that the outer peripheral surface 31a of the flat plate The spherical body rotation guide member 31 is installed inside the top opening 6t side of the top pipe 6 so that watertightness between the top pipe 6 and the inner peripheral surface 6x of the top pipe 6 is maintained. The watertight performance maintaining member 31b is provided in the groove 31h formed in the outer peripheral surface 31a so as to make a round on the outer peripheral surface 31a of the flat plate 31x, and is provided so as to protrude from the outer peripheral surface 31a. It can be stably installed on the outer peripheral surface 31a of the flat plate 31x so that it can be exhibited. Moreover, it is preferable to provide the watertight performance maintaining member 31b on both the front and rear sides of the outer peripheral surface 31a of the flat plate 31x.
The spherical body accommodating portion 33 is formed by a through hole that penetrates the central portion of the plate surface of the flat plate 31 x of the spherical body rotation guide member 31, and the inner surface of the through hole is formed by a concave curved surface having the same curvature as the spherical surface of the spherical body 30. The
The curved surface of the spherical body accommodating portion 33 is provided with a watertight performance maintaining member 33b such as a rubber packing so as to make a round around the center line of the through hole forming the curved surface. The curved surface of the portion 33 is opposed to the curved surface of the spherical body 30 with a slight gap of about several mm (for example, 5 mm), and the watertight performance maintaining member 33b and the spherical surface of the spherical body 30 are in contact with each other. It is comprised so that the watertightness between the curved surfaces of the accommodating part 33 may be maintained. The watertight performance maintaining member 33b is housed in a groove 33h formed on the curved surface of the sphere housing portion 33 and provided so as to protrude from the curved surface, so that the watertight performance of the sphere housing portion 33 can be sufficiently exhibited. Can be installed stably on curved surfaces.
As shown in FIG. 3, the shaft accommodating portion 34 is formed by a hole provided in the flat plate 31x so as to extend from the curved surface of the sphere accommodating portion 33, and the sphere 30 rotates about the sphere rotation center line 30b. In this case, the upper and lower ends of the spherical rotation center shaft 30a protruding from the spherical surface are accommodated so as to be swingable in the front-rear direction. The shaft accommodating portion 34 is configured so that the upper shaft accommodating portion 34x that accommodates the upper end portion of the spherical rotation center shaft 30a so as to be swingable in the front-rear direction, and the lower end portion of the spherical rotation center shaft 30a is movable in the front-rear direction. And an upper shaft accommodating portion 34y for accommodating.

As shown in FIG. 2; FIG. 3, the flat plate 31x forming the spherical body rotation guide member 31 is configured by combining a front plate 31A and a rear plate 31B.
As shown in FIG. 2, the front plate 31A includes a front side ball housing portion 33A and a front side shaft housing portion 34A. The front sphere accommodating portion 33A is formed by a concave curved surface that is formed so as to penetrate the central portion of the plate surface of the front plate 31A and receives the front spherical surface of the sphere 30.
The front shaft housing portion 34A is provided on the front plate 31A so as to extend from the front upper shaft housing portion 34A1 provided on the front plate 31A and the lower portion of the front ball housing portion 33A so as to extend from the upper portion of the front ball housing portion 33A. The front lower shaft accommodating portion 34A2 is provided.
The front upper shaft housing portion 34A1 has a hole bottom that opens to the rear plate surface of the front plate 31A and the curved surface of the front ball housing portion 33A and does not open to the front plate surface and upper end surface of the front plate 31A. It is comprised by the hole which was made. The front lower shaft housing portion 34A2 has a hole bottom that opens on the rear plate surface of the front plate 31A and the curved surface of the front ball housing portion 33A and does not open on the front plate surface and the lower end surface of the front plate 31A. It is comprised by the hole which had.
The rear plate 31B includes a rear ball housing portion 33B and a rear shaft housing portion 34B. The rear sphere accommodating portion 33B is formed by a concave curved surface that is formed so as to penetrate the central portion of the plate surface of the rear plate 31B and that receives the rear spherical surface of the sphere 30.
The rear shaft housing portion 34B is formed on the rear plate so as to extend from the rear upper shaft housing portion 34B1 provided on the rear plate so as to extend from the upper portion of the rear ball housing portion 33B and the lower portion of the rear ball housing portion 33B. And a rear lower shaft housing portion 34B2.
The rear upper shaft accommodating portion 34B1 is configured by a hole portion that has openings on the front and rear plate surfaces of the rear plate 31B and the curved surface of the rear ball accommodating portion 33B, and has a hole bottom portion that does not open on the upper end surface of the rear plate 31B. Is done. The rear lower shaft accommodating portion 34B2 is formed by a hole having a hole bottom that opens on the front and rear plate surfaces of the rear plate 31B and the curved surface of the rear sphere accommodating portion 33B and does not open on the lower end surface of the rear plate 31B. Composed.
For example, the front plate 31A and the rear plate 31B are formed in the same size, and a pair of front upper shaft housing portion 34A1 and rear upper shaft housing portion 34B1 are formed at the same position on the flat plate constituting the front plate 31A and the rear plate 31B. A pair of front lower shaft housing portion 34A2 and rear lower shaft housing portion 34B2 are provided.

The front spherical surface of the sphere 30 is accommodated in the front sphere accommodating portion 33A from the rear plate surface side of the front plate 31A, and the rear spherical surface of the sphere 30 is accommodated from the front plate surface side of the rear plate 31B. By being accommodated in the portion 33B, the sphere 30 is surrounded by the front sphere accommodating portion 33A and the rear sphere accommodating portion 33B, and is formed by the front sphere accommodating portion 33A and the rear sphere accommodating portion 33B. The upper end 30m that is the upper and lower protrusions of the sphere rotation central shaft 30a; the lower end 30n is received in the front shaft receiving portion 34A or the rear shaft receiving portion 34B. The plate surface on the rear side of the front plate 31A and the plate surface on the front side of the rear plate 31B are brought together, and the opening on the plate surface on the front side of the rear plate 31B and the opening on the plate surface on the rear side of the front plate 31A are communicated. State. In this state, the front plate 31A and the rear plate 31B are connected by connecting means such as welding, so that the upper end portion 30m of the spherical rotation center shaft 31a is formed by the front upper shaft housing portion 34A1 and the rear upper shaft housing portion 34B1. And the lower end 30n of the spherical rotation center shaft 31a is accommodated in the lower shaft accommodating portion 34y formed by the front lower shaft accommodating portion 34A2 and the rear lower shaft accommodating portion 34B2. A sphere assembly 300 is obtained in which the sphere 30 accommodated in the sphere accommodating portion 33 is rotatable about the center of the sphere 30 as a rotation center. The upper shaft housing portion 34x and the rear lower shaft housing portion 34y are preferably provided on a vertical line perpendicular to the upper and lower inner wall surfaces 6c and 6d of the leading tube 6, but the upper and lower inner wall surfaces 6c of the leading tube 6 are provided. It may be provided on a straight line intersecting 6d.
In the sphere assembly 300, the sphere-side coupling flanges 30d and 30d are welded to the left and right spherical surfaces of the rear opening of the support post support hole 13 of the sphere 30 protruding rearward from the rear plate surface of the rear plate 31B. Fix with fixing means such as.

  The spherical body driving means 32 includes a right and left swinging jack 35 for swinging the spherical body 30 in the left-right direction of the top tube 6 with the spherical rotation center axis 30a as a rotation center, and a spherical body with the spherical rotation center line 30b as a rotation center. And an upper / lower swinging jack 36 for swinging 30 in the vertical direction of the top pipe 6.

As will be described later, the front plate surface of the front plate 31A of the spherical assembly 300 is brought into contact with the propulsive force receiving portion 63 fixed to the inner surface of the front tube 6 on the front opening 6t side, and the front of the spherical assembly 300 is moved forward. The spherical body assembly 300 is installed in a state where the movement is restricted by the propulsive force receiving portion 63.
The piston-side connecting flange 35b provided on the front end side of the piston 35a of the swinging jack 35 and the sphere-side connecting flange 30d attached to the sphere 30 are fixed by fixing means such as bolts and nuts not shown in the figure, A cylinder side connecting flange 35d provided on the base end side of the cylinder 35c of the swinging jack 35 and a fixed side connecting flange 64r provided on a propulsive force transmitting component 64 described later are fixed by fixing means such as bolts and nuts not shown. Is done.
A spherical bearing 35x is provided at the distal end of the piston 35a of the swinging jack 35 and the base end of the cylinder 35c. When the spherical body 30 is rotated, the swinging jack 35 changes its posture by the spherical bearing 35x. It is configured to be able to.
Further, the upper swinging jack 36 is provided with a pressing plate 36b that presses the upper end protruding from the spherical surface of the spherical rotation center shaft 30a at the tip of the piston 36a, and the lower swinging jack 36 is at the tip of the spherical rotation center 36a. A pressing plate 36b that presses the lower end protruding from the spherical surface of the shaft 30a is provided. The pressing plate 36b is formed in a concave shape in which the tip shape takes in the spherical rotation center axis 30a. The upper swinging jack 36 is fixed at the base end side of the cylinder 36b to the upper jack reaction force receiving member 18a so that the pressing plate 36b provided at the front end of the piston 36a can move in the front-rear direction within the upper shaft accommodating portion 34x. The lower swinging jack 36 is configured such that the base end side of the cylinder 36b receives the lower jack reaction force so that the pressing plate 36b provided at the distal end of the piston 36a can move in the front-rear direction in the lower shaft accommodating portion 34y. It is fixed to the member 18b (see FIG. 4).

  As described above, the sphere driving means 32 rotates the sphere 30 around the center of the sphere 30 in the left-right direction and the front-rear direction of the top tube 6, so that the rotary excavation body 46 fixed to the sphere 30 via the support column 42 starts. An excavating machine rocking drive device 25 that can rock the head pipe 6 in the left-right direction or the up-down direction in front of the pipe 6 is configured.

The leading opening edge 6z of the leading tube 6 is formed on a tapered inclined surface so as to easily bite into the natural ground 99 (see FIG. 5).
Two drainage pipe holding through-holes 14 are provided so as to penetrate the left and right sides of the lower side of the plate surface of the flat plate 31x of the spherical body rotation guide member 31, respectively. Two water supply pipe holding through holes 15 are provided so as to penetrate the left and right sides of the upper part of the plate surface of the flat plate 31x of the spherical body rotation guide member 31, respectively. The mud pipe holding through-holes 14 and 14 are held in a state where the tip of the mud pipe 76c penetrates. The water supply pipe holding through-holes 15; 15 are held in a state where the tip of the water supply pipe 75c penetrates (see FIG. 6).

The excavating machine 26 includes a support unit 40 and a rotating unit 41.
The support portion 40 is formed by a T-shaped hollow column in which one column 42 and two branch columns 43 are combined. The two branch columns 43 extend in a direction away from each other on a straight line perpendicular to the extending direction of the columns 42 from the distal end portion of the column 42.
The rotating unit 41 includes a rotating mechanism unit 45 and a rotating excavator 46. The rotation mechanism unit 45 is configured by a motor 47, for example. Motor mounts 44 are provided at both ends of the branch column 43, and a casing 48 of a motor 47 is fixed to each motor mount 44; 44. The rotating shafts 49; 49 of the two motors 47; 47 extend in directions away from each other on a straight line perpendicular to the extending direction of the support column (that is, on the center line of the branch support column 43) from the tip end of the support column 42.
The rotary excavator 46 includes, for example, a circular box-shaped rotary body 50 having one end opening and the other end closed, which includes a cylindrical portion 50a and a bottom plate 50b that closes the other end of the cylindrical portion 50a, and an outer periphery of the cylindrical portion 50a of the rotary body 50. A plurality of excavation bits 52 provided on the surface 51 are provided.
The excavation diameter by the excavation bit 52 with the excavation radius of the excavation bit 52 as the distance from the rotation center line L of the rotating body 50 to the tip of the excavation bit 52 passing through the line orthogonal to the rotation center line L is the leading pipe 6 Is smaller than the dimension between the upper and lower inner wall surfaces 6c; 6d.

As the motor 47, for example, a motor that operates by fluid pressure or a motor that operates by electricity is used. For example, when a hydraulic motor (hereinafter referred to as a hydraulic motor 47) is used, a pressure hose 56 in which a hydraulic source 55 as the drive source 27 and the casing 48 of the hydraulic motor 47 form a pressure oil supply path 56a and an oil return path 56b. Connected with That is, the pressure hose 56 is connected to the casing 48 of the hydraulic motor 47 through the T-shaped hollow path of the support portion 40. The hydraulic motor 47 is configured such that the rotating shaft 49 is rotated by pressure oil supplied into the casing 48 via the pressure hose 56.
For example, the rotation rotated by the hydraulic motor 47 and the inner surface 53 of the bottom plate 50b of the rotating body 50 so that the circle center of the inner surface 53 of the bottom plate 50b of the rotating body 50 of the rotary excavator 46 and the rotation center of the rotating shaft 49 coincide. A connecting plate 54 provided at the tip of the shaft 49 is connected by a connecting tool 57 such as a screw. That is, the two rotary excavating bodies 46; 46 are positioned in front of the leading opening 6t of the leading pipe 6, and the two rotary excavating bodies 46; 46 are one rotation center line L common to the two rotating shafts 49; 49. Is configured to rotate around the center of rotation. Such a configuration including two rotary excavating bodies 46; 46 is called a twin header.
In the first embodiment, as described above, the rotation center line L of the two rotary excavated bodies 46; 46 is parallel to the plane orthogonal to the propulsion direction of the leading pipe 6 and the upper and lower inner wall surfaces 6c; When the natural ground 99 is excavated in the first state parallel to the vertical direction, the excavation width of the rotary excavation body 46 in the plane orthogonal to the propulsion direction can be increased, and further, the excavation can be performed in a quadrangular cross section. The square-width tube 2 can be easily installed in the underground 10.
Further, in the first embodiment, as shown in FIG. 7, the left and right swinging jacks 35; 35 of the excavating machine swing drive device 25 are operated and the sphere 30 is rotated about the sphere rotation center axis 30a. In a second state in which the rotational center line L of the two rotary excavated bodies 46; 46 intersects with the surface perpendicular to the propulsion direction of the leading pipe 6 in a state other than perpendicular and parallel to the inner wall surface 6d below the leading pipe 6 When excavating the natural mountain 99, the natural mountain 99 can be excavated at the left and right width intervals wider than the left and right width intervals of the leading tube 6 in front of the leading tube 6, so that when the leading tube 6 propels, The possibility that the front opening 6t collides with the hard layer of the natural ground 99 is reduced, and the front pipe 6 can be smoothly promoted.
Furthermore, in the first embodiment, the upper and lower swinging jacks 36; 36 of the excavating machine swing driving device 25 are operated, and the sphere 30 is rotated about the sphere rotation center line 30b (second rotation center line). 8, the rotation center line L of the two rotary excavating bodies 46; 46 is moved in the vertical direction of the top pipe 6 while maintaining a state parallel to the inner wall surface 6d below the top pipe 6. When the natural ground 99 is excavated in the state 3, the natural ground 99 can be excavated at a vertical width interval wider than the vertical width interval of the leading pipe 6 in front of the leading pipe 6. The possibility that the leading opening 6t of the leading pipe 6 collides with the hard layer of the natural ground 99 is reduced, and the leading pipe 6 can be smoothly promoted.

The propulsion device 70 includes a propulsion drive source 61, the above-described spherical rotation guide member 31, a propulsive force transmission unit 62 that transmits the propulsive force generated by the propulsion drive source 61 to the spherical rotation guide member 31, and a transmission to the spherical rotation guide member 31. And a propulsive force receiving portion 63 for transmitting the propulsive force transmitted to the leading pipe 6.
The propulsive force receiving portion 63 contacts the front plate surface of the front plate 31A of the spherical rotation guide member 31 installed on the inner side of the front opening 6t of the front tube 6 and moves the spherical rotation guide member 31 forward. It is fixed to the inner surface of the leading opening 6t side of the leading pipe 6 by fixing means such as welding, bolts and nuts so that the propulsive force transmitted to the spherical rotation guide member 31 can be transmitted to the leading pipe 6 while being regulated. ing.
The propulsive force transmission means 62 includes a propulsive force transmission component 64, a propulsive force transmission rod 71, and a propulsion force transmitting member 72.
The propulsive force transmission component 64 is formed by combining, for example, H-section steel. For example, to extend the left vertical extension bar portion 64a before being connected to the left end rear surface provided so as to extend above and below the spherical rotary guide member 31, is connected to the right end rear end surface of the spherical rotary guide member 31 up and down The front left upper / lower extension post 64b, the rear left upper extension post 64c connected to the left end of the jack reaction force receiving member 18a; 18b and extended vertically, and the jack reaction receiving member 18a. A rear right upper and lower extension post 64d connected to the right end of 18b and extending vertically, and a front end and front left upper extension post 64a extending in the front and rear direction are connected to the rear end and rear left. The left connecting portion 64e connected to the vertical extending column portion 64c, the front end and the front right vertical extending column portion 64b extending in the front-rear direction, and the rear end and the rear right vertical extending column portion 64d connected. Right connecting part 64 Provided with a door.

The propulsive force transmitting rod-like body 71 is a rod-shaped member whose length from one end to the other end is longer than the shortest distance between the rear end surface 64x of the propulsive force transmitting component 64 and the rear end surface 102e of the leading pipe 6. Is the body. As the propulsive force transmission rod-shaped body 71, for example, H-shaped steel is used.
The propulsive force transmission rod-like body 71 is installed such that the center line faces the same direction as the center line of the leading pipe 6. The front end surface of the left propulsive force transmitting rod-like body 71A and the upper and lower center positions on the rear surface of the rear left upper / lower extension column portion 64c are connected, and the front end surface of the right propulsive force transmission rod-like body 71B and the rear right upper / lower extension column portion 64d. The upper and lower center positions on the rear surface are connected.

  The propulsion drive source 61 is constituted by, for example, a hydraulic jack 61A. A pressing plate 61b is provided at the tip of the piston rod 61a of the hydraulic jack 61A. The cylinder 61c of the hydraulic jack 61 is fixed to a jack reaction force receiving member (not shown).

And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B projecting rearward from the rear end face 102e of the leading pipe 6, and the left and right propelling force transmitting rod-like bodies 71A; 71B Are connected to the other end by a bolt or a vise device not shown in the figure, and the central portion between the other ends of the left and right propulsive force transmitting rods 71A; 71B in the abutting member 72 is pressed by the pressing plate 61b of the hydraulic jack 61A. Thus, the pressing force by the hydraulic jack 61A is transmitted to the leading pipe 6 and the rotary excavating body 46; 46 via the propulsive force transmitting rod 71, the propulsive force transmitting component 64, the spherical rotation guide member 31, and the propulsive force receiving portion 63. Therefore, the leading pipe 6 propels forward and the rotary excavator 46; 46 propels forward.
In this case, the right propulsive force transmitting rod-like body 71B connected to the upper and lower central positions on the rear surface of the rear right upper and lower extension post 64d and the left side connected to the upper and lower central positions on the rear surface of the rear left upper and lower extension post 64c. The propulsive force transmitted to the propulsive force transmitting component 64 via the propulsive force transmitting rod 71A is transmitted to the four corners of the rear end surface 31r of the spherical rotation guide member 31 (FIG. 2; FIG. 3). As shown in FIG. 6, the propulsive force can be evenly transmitted to the spherical rotation guide member 31, and the swinging motion of the excavating machine swing drive device 25 can be stabilized.

The water supply device 75 includes a water storage tank 75a, a pump 75b for water supply, a water supply pipe 75c, and a water supply pipe holding through hole 15 that holds a front end opening of the water supply pipe 75c.
The water supply pipe 75c is formed by a steel pipe, for example. The water supply pipe holding through-hole of the spherical rotation guide member 31 is located at the front end opening side of the water supply pipe 75c so that water can be discharged to the ground 99 in front of the front surface 31f of the spherical rotation guide member 31 through the front end opening. 15 is fixed. The rear end opening of the water supply pipe 75c and the discharge port of the water supply pump 75b are connected so as to be able to communicate with each other. And the suction port of the pump 75b for water supply and the water storage tank 75a are connected so that communication is possible by the connecting pipe outside a figure. Two systems of water supply devices 75 are provided on the left and right sides inside the upper portion of the top pipe 6.

The mud drain device 76 includes a mud tank 76a, a pump 76b for mud, a mud pipe 76c, and a mud pipe holding through hole 14 that holds the front end opening of the mud pipe 76c.
The mud drain pipe 76c is formed of a steel pipe, for example. The front end opening side of the mud pipe 76c is connected to the mud pipe holding through hole 14 of the sphere rotating guide member 31 so that the excavated soil gathered in front of the front surface 30f of the sphere rotating guide member 31 can be taken in through the front end opening. Fixed. The rear end opening of the mud pipe 76c and the suction port of the mud pump 76b are connected so that they can communicate with each other. And the discharge port of the pump 76b for mud and the mud tank 76a are connected so that communication is possible by a connecting pipe outside the figure. Two systems of the mud discharge device 76 are provided on the left and right sides inside the lower portion of the top pipe 6.

In addition, the water storage tank 75a and the waste mud tank 76a are comprised by the collection tank 75X which the water storage tank 75a and the waste mud tank 76a integrated, for example. That is, the partition 75w is provided inside the collective tank 75X to divide the collective tank 75X into two regions, one region is used as the water storage tank 75a, and the other region is used as the mud tank 76a.
That is, when a certain amount of water is initially filled in the collecting tank 75X and the water pump 75b is driven to feed water forward of the spherical rotation guide member 31, the water is pumped forward of the spherical rotation guide member 31. The mixed water and the earth and sand excavated by the rotary excavator 46; 46 become muddy water. And the mud water ahead of the spherical body rotation guide member 31 is discharged to the mud tank 76a by driving the pump 76b for mud. Mud in the mud discharged to the mud tank 76a settles on the bottom of the mud tank 76a, and the mud that has entered the water storage tank 75a beyond the partition 75w is again fed by the spherical pump by the pump 75b for water supply. 31 is pumped forward. That is, since the muddy water can be circulated and supplied to the front of the spherical body rotation guide member 31, the amount of water used can be reduced. Further, since muddy water having a specific gravity greater than that of water can be supplied to the front of the spherical rotation guide member 31, the pressure of the ground and groundwater and the pressure supplied to the front of the spherical rotation guide member 31 can be resisted. Therefore, the influence on the underground 10 such as land subsidence can be reduced. Moreover, since the front of the spherical body rotation guide member 31 is muddy, the mud can be drained smoothly, and excavation is facilitated.
Alternatively, the muddy water may be filled in the collecting tank 75X from the beginning, and the muddy water may be circulated between the front of the spherical rotating guide member 31 and the collecting tank 75X by driving the water supply pump 75b.

Next, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated.
An assembly in which the excavating machine 26, the excavating machine swing drive device 25, the propulsion device 70 excluding the pad 72, the water supply pipe 75c, and the mud pipe 76c is assembled from the excavation rotating body 46 side. The lead pipe 6 is inserted into the lead pipe 6 through the rear end opening, and the front end face 31f of the spherical body rotation guide member 31 and the propulsive force receiving portion 63 fixed inside the lead pipe 6 are brought into contact with each other. And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmission rod-like bodies 71A; 71A; It connects with the other end of 71B with a volt | bolt outside a figure, a vise, etc. Then, the pump 75b for water supply is driven to supply muddy water to the front of the sphere rotation guide member 31, and the muddy water is circulated between the front of the sphere rotation guide member 31 and the inside of the collecting tank 75X. The propulsive force is propelled by supplying the propulsive force to the abutting material 72 by operating the propulsion drive source 61 while supplying the pressure oil from the hydraulic source 55 to the hydraulic motor 47 and rotating the rotary excavator 46 by the control. The force is transmitted to the leading pipe 6 and the rotary excavating body 46; 46 through the force transmission rod 71, the propulsive force transmitting component 64, the spherical body rotation guide member 31, and the propelling force receiving part 63, and the leading pipe 6 propels forward. A rotary excavator 46; 46 propels forward. At this time, the left and right swinging jacks 35; 35 are operated under the control of the control device 65, and the sphere 30 is rotated about the sphere rotation center axis 30a. The natural ground 99 is excavated by swinging like a swing in the horizontal direction of the pipe 6. As a result, the ground 99 is excavated with a width between the left and right widths wider than the left and right width of the top pipe 6 in front of the top pipe 6, so that when the top pipe 6 is propelled, the tip of the top pipe 6 is hard ground. The possibility of colliding with the mountain 99 is reduced, and the leading pipe 6 can be smoothly promoted. Further, by controlling the control device 65, the upper and lower swinging jacks 36; 36 are operated, and the sphere 30 is rotated about the sphere rotation center line 30 b, so that the excavation rotator 46 is in front of the leading pipe 6. 6 rocks like a swing in the vertical direction of 6 and excavates the natural ground 99. As a result, the ground 99 is excavated with a vertical interval width wider than the vertical interval of the leading pipe 6 in front of the leading pipe 6, so that when the leading pipe 6 is propelled, the tip of the leading pipe 6 is grounded on the hard ground. The possibility of colliding with the mountain 99 is reduced, and the leading pipe 6 can be smoothly promoted.
After the leading pipe 6 is installed in the ground 10 leaving the rear end face 102e of the leading pipe 6, the succeeding pipe 7 is connected to the rear end face 102e of the leading pipe 6 by welding or a fixture such as a bolt, By connecting the other end of the leading thrust transmission rod 71 and one end of the trailing thrust transmission rod 71 by bolts or welding, the following thrust is placed behind the leading thrust transmission rod 71. In addition to adding the transmission rod-like body 71, an extension pressure hose (not shown) is added to the other end of the pressure hose 56, and an extension water supply pipe (not shown) is added to the other end of the water supply pipe 75c. An extended sludge pipe (not shown) is added to the other end. Then, the abutting member 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B projecting rearward from the rear end edge of the succeeding pipe 7, and the abutting member 72 is disposed on the piston of the hydraulic jack 61A. By rotating and driving the rotary excavator 46; 46 while being pressed by the rod 61a, the leading pipe 6 is propelled while the rotary excavator 46 excavates, and the subsequent pipe 7 is installed in the ground.
Thereafter, similarly, the support work 11 can be constructed by sequentially connecting the subsequent succeeding pipe 7 to the rear end edge of the preceding succeeding pipe 7 and installing it in the ground 10.

After the support work 11 is constructed, the excavating machine 26 and the like are pulled back into the cavity 100 on the starting side that is the starting point of excavation and collected. According to the first embodiment, since the propulsive force transmission rod-shaped body 71 is added, when the excavating machine 26 and the like are collected, the propulsive force transmission rod-shaped body 71 1 is selected from the rearmost propulsive force transmission rod-shaped body 71 side. The excavating machine 26 and the like can be easily collected by pulling back into the cavity 100 by the length of each piece and detaching the propulsive force transmission rod-like body 71 in order from the last side to the top. In this case, the hydraulic jack 61A, which is an example of the propulsion device, needs to be installed only in the hollow portion 100 serving as the excavation start point, so that the device cost can be reduced.
Note that the excavating machine 26 and the like may be pushed into the cavity 100 on the reaching side and recovered.
For example, the leading pipe 6 is pushed out to the reaching-side cavity 100 to remove the propulsive force receiving portion 63, and then the excavating machine 26 and the like are pushed into the reaching-side cavity 100 and collected. In this case, the operation of pushing the excavating machine 26 and the like into the cavity 100 on the arrival side is easier than the operation of pulling the excavating machine 26 and the like back into the cavity 100 that is the starting point of excavation. Collection work becomes easy.
As shown in FIG. 11B, when the support work 11 is constructed so as to start from one cavity 100 formed in the ground 10 and return to the cavity 100, the excavating machine 26 or the like is If the excavating machine 26 or the like is recovered by pushing it out of the reaching port into the cavity 100 when the arrival port of the hollow part 100 is reached, the recovery operation of the excavating machine 26 or the like is facilitated and the hydraulic jack 61A is installed. Since it suffices to install only in one cavity 100, the apparatus cost can be reduced.

According to the first embodiment, since the pipe installation device 1 includes the excavating machine swing driving device 25, the spherical rotation guide member driving means 32 when excavating the natural ground 99 in front of the top pipe 6 with the rotary excavating body 46. The rotary excavator 46 can be swung in the horizontal direction or the vertical direction of the top tube 6 in front of the top tube 56 by rotating the sphere 30 by operating Compared with the case where it does not swing, it is possible to increase the lateral width or vertical width that allows excavation. In other words, prior to the advancement of the top tube 6, a cross-sectional area wider than the top tube 6 can be excavated in front of the top tube 6 and left and right and up and down in front of the top tube 6. Therefore, even when the natural ground 99 is a hard ground, the top pipe 6 can be smoothly promoted in the underground 10.
That is, as the spherical body driving means 32, the upper and lower inner wall surfaces 6c of the leading tube 6 facing each other in parallel with each other; the left and right inner wall surfaces 6a of the leading tube 6 facing with each other in parallel with 6d (one pair of wall surfaces); A pair of left and right rocking jacks 35; 35 for rotating the sphere around a rotation center shaft 30a (first rotation center line) extending so as to intersect with 6b (the other pair of wall surfaces), and a rotary excavation body 46, a pair of upper and lower swinging jacks 36 and 36 that rotate the sphere around the rotation center line 30b (second rotation center line) parallel to the rotation center line L of 46, and in front of the leading pipe 6, The left and right inner wall surfaces 6a; 6b of the leading pipe 6 can be excavated at a horizontal width wider than the horizontal width of the leading pipe 6 in the direction orthogonal to the leading pipe 6 and the inner wall 6c above and below the leading pipe 6 In a direction perpendicular to 6d Since the natural ground can be excavated at a wider vertical interval than the vertical interval of the leading pipe 6, the pipe installation device capable of smoothly propelling the pipe in the ground even when the natural ground is hard ground Can provide.

Embodiment 2
The leading pipe 6 may be propelled using a gripper device. In this case, the gripper device includes, for example, a plurality of jack supports that are fixed to the rear plate 31B of the sphere rotation guide member 31 and extend rearward of the sphere rotation guide member 31, and a jack cylinder. Is fixed to the jack support body, and is configured to include a plurality of jacks that come into contact with the inner surface of the leading pipe 6 by extending the piston of the jack.
When the pistons of a plurality of jacks are extended and operated so as to be stretched against the inner surface of the leading pipe 6, the leading pipe 6 is propelled by pushing the rear end surface 102 e of the leading pipe 6 with the propulsion jack 61 </ b> A. In addition, the excavating machine swing driving device 25 and the excavating machine 26 can be propelled together, and the propulsive force transmitting means 62 and the propulsive force receiving portion 63 can be dispensed with. For this reason, the excavating machine 26 and the like can be collected on the arrival side.
Moreover, it becomes possible to sufficiently counter the water pressure applied to the spherical body rotation guide member 31 from the natural ground 99 side.

Embodiment 3
In the first embodiment, by rotating the sphere 30 around the sphere rotation center axis 30a and the sphere rotation center line 30b, the rotary excavation body 46 swings in the left-right direction or the up-down direction of the top tube 6 in front of the top tube 6. The configuration includes the swinging jacks 35; 35 as the first swinging jacks and the swinging jacks 36; 36 as the second swinging jacks. The line (center line of the support pillar through hole 13 of the sphere 30 and the support pillar 42) is set as the third rotation center line, and the sphere 30 is rotated around the third rotation center line as the rotation center line. A third rocking jack (not shown) for rocking the rotary excavator 46 may be provided so that L intersects with the left and right inner wall surfaces 6c; The third rocking jack is constituted by a pair of hydraulic jacks provided such that the piston extends and contracts in the vertical direction of the leading pipe 6, for example. In addition, when the rotary excavator 46; 46 is provided so that the center line of the column support through-hole 13 and the column 42 of the sphere 30 does not coincide with the center line of the top pipe 6, the third rotation center line is It becomes the center line of the column support through hole 13 and the column 42 of the sphere 30 parallel to the center line of the top tube 6. In this case, the shaft portions 30m and 30n of the sphere 30 also rotate in the direction in which the sphere 30 rotates around the third rotation center line, so that the upper shaft housing portion 34x that houses the shaft portions 30m and 30n, The side shaft accommodating portion 34y is configured to include a space in which the shaft portions 30m and 30n can move in the rotation direction of the sphere 30 that rotates about the third rotation center line.

Embodiment 4
In the third embodiment, the configuration including all of the first swinging jack, the second swinging jack, and the third swinging jack is shown. However, the first swinging jack, the second swinging jack, It is good also as a structure provided with one or more of the 3rd rocking jacks.

Embodiment 5
In each of the above embodiments, an example using the first swinging jack, the second swinging jack, and the third swinging jack configured by a pair of jacks has been described, but the first swinging jack, the second swinging jack, The two rocking jacks and the third rocking jack may each be constituted by one jack.

Embodiment 6
In the case of a configuration including only the first swinging jack, as a rotary excavator, as an excavating blade provided so as to protrude from the outer peripheral surface 51 of the rotary member 50 as shown in FIGS. By using the rotary excavator 46 </ b> A having the first excavation bit 80 and the second excavation bit 81, extra excavation can be performed on the upper and lower sides in front of the top pipe 6.
A plurality of second excavation bits 81 are arranged in a direction along the rotation center line L of the rotating body 50 to constitute a second excavation bit group 810.
A plurality of bit attachment portions 83 are provided on the outer peripheral surface 51 of the rotating body 50 so as to be scattered. The first excavation bits 80 are individually detachably attached to individual bit attachment portions 83 provided on the outer peripheral surface 51 of the rotating body 50. The 2nd excavation bit 81 is provided in the bit installation board 84 attached to the some bit attachment part 83 provided in the outer peripheral surface of the rotary body 50 so that attachment or detachment is possible. That is, the second excavation bit group 810 is attached to the bit attachment portion 83 and is rotated along the rotation center line L of the rotation body 50 (the rotation center line L of the rotation excavation body 46). A plurality of bit installation surfaces 84a of the bit installation plate 84 extending over the surface width (the width in the direction along the rotation center line L, that is, both end surfaces in the direction along the rotation center line L of the rotating body 50). The second excavation bit 81 is detachably or fixedly provided so as to be aligned in the direction along the rotation center line L.
One rotating excavator 46A includes a plurality of second excavation bit groups 810; 810, and the two second excavation bit groups 810; 810 are 180 mutually in the circumferential direction of the outer peripheral surface 51 of the rotary body 50. Three pairs of, for example, a pair of two second excavation bit groups 810; 810 respectively provided at positions apart from each other are provided. The first excavation bit 80 is provided on the outer peripheral surface 51 of the rotating body 50 at a portion where the second excavation bit group 810 is not provided.
As shown in FIG. 13 (b), the tips of the respective excavation bits 81 of the respective second excavation bit groups 810; 810 provided at positions 180 ° apart from each other on the outer peripheral surface 51 of the rotating body 50 are The rotation body 50 is set so as not to be located on the same plane 85 orthogonal to the rotation center line L. That is, the ground portion that is not excavated between the adjacent excavation bits 81 in one second excavation bit group 810 can be excavated by the excavation bits 81 of the other second excavation bit group 810. In short, one single rotary excavation body 46 </ b> A has a pair of complementary second second holes that enable excavation of a ground portion that cannot be excavated by one second excavation bit group 810 using the other second excavation bit group 810. It is the structure provided with the excavation bit group 810; 810.
Then, as shown in FIG. 14A, a first distance 80x (that is, the first distance) from the rotation center line L of the rotating body 50 to the tip of the first excavation bit 80 via a line orthogonal to the rotation center line L. A second radius 81x (that is, a second radius 81x) from the rotation center line L of the rotating body 50 to the tip of the second drill bit 81 via a line orthogonal to the rotation center line L. The excavation radius by the excavation bit is different.
That is, the excavation diameter by the first excavation bit 80 with the first distance 80x as the excavation radius is between the upper and lower inner wall surfaces 6c; 6d of the leading pipe 6 (between the inner wall surfaces of one pair of wall surfaces of the leading pipe 6). The diameter of excavation by the second excavation bit 81, which is set smaller than the dimension 9x and has the second distance 81x as the excavation radius, is based on the dimension 9x between the upper and lower inner wall surfaces 6c; In addition, the rotary excavator 46A is configured to be movable forward of the leading pipe 6 and inside the leading pipe 6 through the leading opening 6t of the leading pipe 6.
That is, the first excavation body 46A passes through the pipe 2 because the rotary excavation body 46A is set to have a rotation radius dimension that allows the rotation excavation body 46A to rotate around the rotation center line L inside the leading pipe 6. It becomes possible, and the excavating machine 26 can be pulled back into the cavity 100 on the starting side and collected.
The second distance 81x is such that the rotary excavator 46A cannot rotate around the rotation center line L inside the head pipe 6 and the rotary excavator 46A is positioned in front of the head opening 6t of the head pipe 6. When set, the rotation radius is set to be rotatable.
That is, the first excavation bit 80 and the second excavation bit 81 are positioned in the front opening 6t of the front pipe 6 by being driven to rotate while the rotary excavation body 46A is positioned in front of the front opening 6t of the front pipe 6. The ground at the front position can be excavated, and the rotary excavator 46A passes through the pipe 2 (the leading pipe 6 and the succeeding pipe 7) and can be recovered in the cavity 100 from which the pipe 2 has started.
By providing the rotary excavating body 46A as described above, a hole having a cross-sectional area larger than the cross section of the top opening 6t in front of the top opening 6t of the top pipe 6 can be excavated. The ground can be excavated before the edge 6z collides with the ground, and the pipe 2 can be pushed more smoothly.
When the excavating machine 26 is collected, the tip of the second excavation bit 81 of the second excavation bit group 810 is flush with the inner wall surface 6c on the top pipe 6 as shown in FIG. The rotary excavator 46A is pulled back into the pipe 2 after the rotary excavator 46A is pulled back into the pipe 2 after being not positioned above the position shown and not below the position showing the same plane as the inner wall surface 6d below the top pipe 6. Is recovered in the cavity 100 on the starting side.

That is, according to the sixth embodiment, the first distance 80x (that is, the first excavation) from the rotation center line L of the rotating body 50 to the tip of the first excavation bit 80 via a line orthogonal to the rotation center line L. The second radius 81x (that is, depending on the second excavation bit) from the rotation center line L of the rotating body 50 to the tip of the second excavation bit 81 via a line orthogonal to the rotation center line L. The excavation diameter by the first excavation bit 80 with the first distance 80x as the excavation radius is the dimension 9x between the upper and lower inner wall surfaces 6c; A rotary excavator 46A having a drilling diameter of the second drilling bit 81 having a second drilling radius of the second distance 81x is set to be larger than the upper and lower inner wall surfaces 6c; Prepared. For this reason, by rotating the rotary excavating body 46A located in front of the top opening 6t of the top pipe 6 and excavating bits 80; 81 excavating the ground, the top pipe 6 is positioned in front of the top opening 6t of the top pipe 6. The width of the square section of the leading opening 6t of the leading pipe 6 (the width dimension corresponding to the radial direction of the rotary excavator 46A, for example, the upper and lower inner wall surfaces of the leading pipe 6) It is possible to excavate a hole with a square cross section having a width dimension larger than the dimension 9x) between 6c and 6d. Therefore, before the top opening edge 6z of the top pipe 6 collides with the ground, the ground positioned in front of the top opening 6t of the top pipe 6 can be reliably excavated by the excavation bits 80; 81. It is possible to prevent a situation in which the opening edge 6z collides with the hard ground and the front pipe 6 cannot be pushed, and the pipe 2 can be pushed more smoothly even when the ground 99 is hard ground.
That is, by operating the first swinging jack, the horizontal excavation width by the rotary excavator 46A is increased, the amount of left and right surplus can be increased, and the second excavation bit group 810 is provided. Due to excavation by the second excavation bit 81, the top and bottom widths of the top tube 6 in the direction perpendicular to the top and bottom inner wall surfaces 6c; 6d (one pair of wall surfaces of the top tube 6) in front of the top tube 6 When the natural ground 99 can be excavated in the vertical width direction of the top pipe 6 in front of the top pipe 6 and the ground 99 can be excavated at a vertical width interval wider than the interval. However, it is possible to propel the tube more smoothly.
In addition, since the excavation diameter by the first excavation bit 80 is smaller than the dimension 9x between the upper and lower inner wall surfaces 6c; 6d of the top pipe 6, when collecting the excavating machine 26 and the like, as shown in FIG. Since the rotary excavator 46A can pass through the pipe 2, the excavating machine 26 and the like can be collected in the cavity 100 on the starting side by pulling the rotary excavator 46A through the pipe 2 and pulling it back.

  The tip positions of the respective excavation bits 81 of the second excavation bit groups 810 and 810 provided at positions 180 ° apart from each other in the circumferential direction on the outer peripheral surface 51 of the rotator 50 are the rotation centers of the rotator 50. It is set so as not to be located on the same surface 85 orthogonal to the line L. In other words, the pair of second excavation bit groups 810; 810 provided at positions 180 ° apart from each other in the circumferential direction on the outer peripheral surface 51 of the rotating body 50 is rotated by one rotation of the rotating excavating body 46A. Since the ground portion that cannot be excavated by the bit group 810 can be excavated by the other second excavation bit group 810, a square section having a larger width dimension than the width dimension of the square section of the leading opening 6t of the leading pipe 6 is used. A hole can be excavated efficiently and the pipe 2 can be propelled more smoothly.

Further, each of the second excavation bit groups 810; 810 is provided at a position 180 degrees apart in the circumferential direction on the outer peripheral surface 51 of the rotary body 50 with the rotation center line L as the center. The rotational center of gravity can be kept constant, the rotation of the rotary excavator 46A can be smoothed and excavated efficiently, and the tube 2 can be propelled more smoothly.
Further, since the second excavation bit 81 and the first excavation bit 80 are provided, the second excavation bit 81 and the first excavation bit 80 can make the hole having the excavation diameter with the second distance 81x as the excavation radius more efficient. Can be excavated.

  The second excavation bit group 810 may be configured by an aggregate of second excavation bits 81 individually attached to individual attachment portions 83 provided on the outer peripheral surface 51 of the rotating body 50.

  In addition, on the outer peripheral surface 51 of the rotator 50, the individual second linearly or non-linearly in the direction along the rotation center line L across both end faces in the direction along the rotation center line L of the rotator 50. The excavation bits 81 are arranged so as to be lined up individually, or along the rotation center line L across both end surfaces in the direction along the rotation center line L of the rotating body 50 on the outer peripheral surface 51 of the rotating body 50. Rotating excavator 46A having a second excavating bit having one excavating blade extending linearly or non-linearly in the direction, the rotating excavator 46A being inside the pipe 2 and rotating centerline L It is only necessary to be configured so that it is not rotatable around the center of the head tube 6 and is rotatable at a position in front of the head opening 6t of the head tube 6.

The second excavation bit groups 810; 810 may not be provided at positions 180 degrees apart from each other on the outer peripheral surface 51 of the rotating body 50 in the circumferential direction.
In short, the rotary excavator 46A has a first distance 80x from the rotation center line L to the tip of the first excavation bit 80 via a line orthogonal to the rotation center line L. A rotation radius that is rotatable about the rotation center line L is set, and a second distance 81x from the rotation center line L to the tip of the second excavation bit 81 via a line orthogonal to the rotation center line L is the rotation excavation. When the body 46A cannot rotate around the rotation center line L inside the pipe 2 and the rotary excavation body 46A is positioned in front of the top opening 6t of the top pipe 6, the body 46A rotates around the rotation center line L. What is necessary is just to set to the possible rotation radius.

Embodiment 7
In the sixth embodiment, the rotary excavator having the first excavation bit 80 and the second excavation bit 81 is used, but the rotary excavator having only the second excavation bit 81 may be used as the excavation bit. Good.
In short, in the case where the rotary excavator does not include the first excavation bit 80, the shortest distance from the rotation center line L to the outer peripheral surface 51 of the rotary body 50 of the rotary excavator passing through a line orthogonal to the rotation center line L. The first distance, which is the distance, is set to a rotation radius that allows the rotary excavator to rotate around the rotation center line L inside the pipe 6, and passes through a line perpendicular to the rotation center line L from the rotation center line L. The second distance 81x to the tip of the second excavation bit 81 (excavation bit) is such that the rotary excavator cannot rotate around the rotation center line L inside the pipe 2 and the rotary excavator 46 is not connected to the leading pipe 6 The rotation radius may be set to be rotatable around the rotation center line L when positioned in front of the top opening 6t.
That is, the diameter of the rotating body 50 with the first distance as the radius is set to be smaller than the dimension between the upper and lower inner wall surfaces 6c; 6d of the leading pipe 6, and the second distance 81x is the second digging radius. Since the excavation diameter by the excavation bit 81 is set to be larger than the dimension 9x between the upper and lower inner wall surfaces 6c; 6d of the front pipe 6 of the front pipe 6, the rotary excavator 46A opens the front opening 6t of the front pipe 6. It is configured to be movable in front of the leading pipe 6 and inside the leading pipe 6.
According to the seventh embodiment, by excavation by the second excavation bit 81, in the direction orthogonal to the upper and lower inner wall surfaces 6c; 6d (one pair of wall surfaces of the leading pipe 6) in front of the leading pipe 6. Since the natural ground 99 can be excavated at a vertical interval wider than the vertical interval of a certain leading pipe 6, and an excavation in the vertical width direction of the leading pipe 6 is possible in front of the leading pipe 6, Even when 99 is hard ground, the pipe can be more smoothly propelled.

Embodiment 8
An injection nozzle (not shown) that injects high-pressure water toward the natural ground 99 is provided at the tip of the support column 42, and high-pressure water is injected from the injection nozzle together with excavation by the rotary excavator 46; 46A. As a result, water reaches the front of the rotary excavator 46; 46A and the water circulates around the rotary excavator 46; 46A. Therefore, the concentration of mud around the rotary excavator 46; The muddy water in front of the body 46; 46A can be reliably discharged.

Embodiment 9
The leading opening edge 6z of the leading tube 6 is configured to have a sharp point. For example, by adopting a configuration in which the front end shape of the left and right walls of the top tube 6 is formed in a curved concave shape and the four corners of the top opening edge 6z of the top tube 6 are formed into sharp sharp edges, the front opening edge 6z is easy to bite into natural ground.

An excavating machine 26 including one or three or more rotary excavators may be used.
Further, the excavating machine 26 may include a rotating excavator that rotates about a rotation center line that intersects the propulsion direction of the leading pipe 6.

  Further, as a method of propelling the pipe, a method of pushing the pipe 2 and the excavator 3 together to push the pipe setting device 1 as in the first embodiment, and a rear end face 102e of the pipe 2 as in the second embodiment. A method of propelling the tube 2 and the excavator 3 together, such as a method of propelling the tube 2 by pushing and pushing the excavator 3 through the gripper device, or the tube 2 There is a method of pushing the excavator 3 separately and propelling the pipe installation device 1.

  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 cavity formed in the ground, and It is also possible to form a support with only the pipes to be put into the pipe (that is, one pipe). In other words, the pipe straddling the one cavity portion 100 and the other cavity portion 100 may be formed by a single tube.

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 quadrilateral shape such as a cross-sectional rectangle, a cross-sectional square, a cross-sectional trapezoid, a cross-sectional parallelogram, and includes a shape in which square corners are chamfered.
Moreover, as a rotary excavation body used for this invention, you may use the thing provided with the single-edged excavation bit as shown to FIG. 5; 8, or the thing provided with the double-edged excavation bit as shown in FIG. May be used.

  In the present invention, the rotation center line L of the rotary excavator 46 has a surface perpendicular to the propulsion direction of the front tube 6 and upper and lower inner wall surfaces 6c of the front tube 6 as a pair of inner wall surfaces opposite to each other in parallel. Although the structure in which the rotary excavator 46 is installed so as to be set in the first state parallel to 6d is shown, the plane in which the rotation center line L is perpendicular to the propulsion direction of the head pipe 6 and the head pipe 6 are parallel to each other. The rotary excavator 46 may be installed so as to be set in a first state parallel to the left and right inner wall surfaces 6a and 6b of the leading pipe 6 as a pair of inner wall surfaces facing each other.

  The cavity 100 of the present invention is formed by a cavity surrounded by a shield tunnel segment, a tunnel cavity surrounded by a mountain tunnel wall, or a space in a shaft. And as underground space formed by the present invention, the space forming the above-mentioned subway platform, the forward space and the return space in the tunnel road and railroad, the junction or branching portion in the tunnel road and railroad, the tunnel road and There is a widened portion on the track.

1 pipe installation device, 2 pipes, 6 leading pipe (pipe), 6t leading opening, 7 following pipe (pipe),
10 underground, 25 excavating machine swing drive device, 26 excavating machine, 30 sphere,
30a Rotation center axis (first rotation center line), 30b Rotation center line (second rotation center line), 31 Sphere rotation guide member, 32 Sphere drive means, 42 strut, 46 Rotation excavation body,
100 Cavity, L Center of rotation.

Claims (2)

When a pipe with a square cross section is installed in the ground from a hollow part formed in the ground, the center of rotation is parallel to the plane perpendicular to the propulsion direction of the pipe in front of the head opening of the pipe that is first placed in the ground. In a pipe installation device that installs a rotary excavator that rotates around the center of rotation, advances the pipe and excavates the ground with the rotary excavator, thereby propelling the pipe and installing it in the ground,
A sphere with a fixed column of rotating excavator,
A sphere rotation guide member that is installed inside the top opening side of the tube and holds the sphere rotatably about the center of the sphere;
A propulsive force transmission component connected to the spherical rotation guide member to transmit the propulsive force to the spherical rotation guide member;
A propulsive force receiver fixed to the inner surface of the top opening side of the tube and restricting the forward movement of the spherical rotation guide member and transmitting the propulsive force transmitted to the spherical rotation guide member to the tube;
A first rotating sphere with a first rotation center line extending so as to intersect with one pair of wall surfaces facing parallel to each other and intersecting with another pair of wall surfaces facing each other in parallel with each other. The induction jack,
And a second guiding jacks turn spheres second rotation axis parallel to the rotation center line of the rotary drilling member as the center of rotation,
The first induction jack has one end connected to the propulsive force transmission component and the other end connected to the sphere,
The second guiding jack is configured such that one end is connected to the propulsive force transmitting component and the other end is configured to press the upper end and the lower end protruding from the spherical surface of the sphere. . When a pipe with a square cross section is installed in the ground from a hollow part formed in the ground, the center of rotation is parallel to the plane perpendicular to the propulsion direction of the pipe in front of the head opening of the pipe that is first placed in the ground. In a pipe installation device that installs a rotary excavator that rotates around the center of rotation, advances the pipe and excavates the ground with the rotary excavator, thereby propelling the pipe and installing it in the ground,
A sphere with a fixed column of rotating excavator,
The center line of the tube as a sphere rotation guide member installed inside the top opening side of the tube and holding the sphere rotatably about the center of the sphere, and as a sphere driving means for rotating the sphere about the center of the sphere a tube installation apparatus you comprising the spherical drive means rotating the sphere as a rotation about a third rotation axis parallel.

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