JP6055220B2 - Pipe installation device - Google Patents

Description

  The present invention relates to a pipe installation device for installing a pipe 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 Documents 1 and 2).

JP 2011-52528 A JP 2012-117275 A

However, if the pipe is installed in the ground using a pipe installation device from a hollow part formed in the ground or the ground, etc., the reaction force from the ground when the tip side of the pipe that has entered the ground collides with the ground. As a result, the rear end of the pipe remaining in the starting part moves in a direction intersecting the center line of the pipe, and the traveling direction of the pipe that has entered the ground shifts, and the pipe is installed at the planned underground position. There was a problem that we couldn't.
The present invention can prevent the rear end of the pipe remaining in the starting portion from moving in a direction crossing the center line of the pipe when the pipe is advanced into the ground, and stabilizes the traveling direction of the pipe that has entered the ground. An object of the present invention is to provide a pipe installation device that can be made to operate.

In the pipe installation device according to the present invention, the excavating machine is installed on the end opening side of the pipe, and the pipe is pushed from the starting portion and is excavated in the ground by the excavating machine, so that the pipe is propelled and installed in the ground. A guide stand having a guide surface for guiding the tube to the departure port of the departure portion, and left and right installation stands provided so as to rise from the left and right side portions of the guide surface; A pipe rear end movement restricting means for restricting movement of the rear end of the pipe remaining in the starting portion after entering the ground from the front end via the starting port in a direction intersecting the center line of the pipe ; And a propulsion device that applies propulsive force to the pipes fixed to the installation table and installed on the guide surface, and the pipe rear end movement restricting means are formed on both the left and right sides of the guide table and placed on the guide table. A groove extending in the front-rear direction, which is the propulsion direction of the pipe, and a tube engaged with the groove Moving means provided so as to be movable in the propulsion direction together, and the concave grooves are formed by left and right concave grooves formed in a cross-sectional concave shape opening on the left and right outer surfaces of the left and right installation bases. However, a gate-shaped body comprising a pair of left and right support columns provided to face each other in parallel with a distance wider than the left and right width distance of the guide table, and a beam member connecting the upper ends of the pair of left and right support columns, The left and right traveling means provided at the lower ends of the pair of left and right struts and a holding member provided with a connecting member, the left and right traveling means are inserted into the left and right concave grooves, When the connecting material is inserted between the upper surface of the tube placed on the guide surface and the beam material, and the tube advances, the gate-shaped body provided with the traveling means and the connecting material advance together. since configured as the rear end of the tube remaining in the starting unit when allowed to proceed tube into the ground Can be suppressed from moving in a direction intersecting the center line of the tube, the traveling direction of entering into the ground tube can be stabilized.
In addition, in the pipe installation device for installing the excavating machine on the tip opening side of the pipe, pushing the pipe from the starting portion and excavating the ground with the excavating machine, to propel the pipe and install it in the ground, A guide stand having a guide surface for guiding the tube to the departure port of the departure portion, and a left and right installation stand provided so as to rise from the left and right sides of the guide surface, and the tube from the tip through the departure port The pipe rear end movement restricting means for restricting the rear end of the pipe remaining in the starting portion after entering the ground and moving in the direction intersecting the center line of the pipe, and fixed to the left and right installation bases, respectively. And a propulsion device that applies propulsive force to the pipe installed on the guide surface, and the pipe rear end movement restricting means is a propulsion direction of the pipe formed on the left and right sides of the guide base and placed on the guide base. A groove extending in the front-rear direction, and engaged with the groove and moved in the propulsion direction together with the pipe And a moving means is formed by the left and right recessed grooves formed in a concave cross section opened on the left and right inner surfaces facing each other of the left and right installation bases. It is composed of left and right convex parts that are connected to the left and right side surfaces, and are inserted into and engaged with the left and right concave grooves to move in the extending direction of the concave grooves. It is possible to suppress the rear end of the pipe remaining in the section from moving in a direction crossing the center line of the pipe, and to stabilize the traveling direction of the pipe that has entered the ground.

Sectional drawing of a pipe | tube installation apparatus (Embodiment 1). The perspective view which showed the head part of the top pipe (Embodiment 1). The figure which looked at the excavation machine inside a pipe | tube from the blade edge | tip side of a guide blade pipe | tube (embodiment 1). The figure which shows the installation method of the pipe | tube in the ground (Embodiment 1). A perspective view showing a pipe installation device (embodiment 1). The disassembled perspective view which shows a pipe | tube installation apparatus (Embodiment 1). An exploded perspective view showing a pipe installation device (embodiment 5). A perspective view showing a pipe installation device (embodiment 5). A perspective view showing a pipe installation device (embodiment 5). Sectional drawing which shows the pipe installation apparatus provided with the excavation machine rocking | fluctuation drive device (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 7). (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 7).

Embodiment 1
An example of the pipe installation device 1 according to the first embodiment for realizing the pipe installation method in the ground will be described with reference to FIGS. 1 to 6.
As shown in FIG. 1, the pipe installation device 1 includes a pipe 2, an excavation device 3, a propulsion device 4, a propulsion force transmission device 70, a guide stand 90, and a pressing member 110. 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. In FIG. 2, the front side, the rear side, the left side, the right side, the upper side, and the lower side of the pipe 2 and the pipe installation device 1 are clearly shown.

The tube 2 is a curved tube formed to bend and extend so as to draw an arc (the center line of the tube (the center point of the cross section perpendicular to the tube extension direction is continuously connected along the tube extension direction). A tube with a straight line), a tube that extends straight (a tube with a straight center line (hereinafter referred to as a straight tube)), or the rear edge of one tube and the other tube It is a pipe constructed by connecting the front end opening edge with a connecting means such as welding, and as one and the other pipe, one pair of side walls facing each other in parallel is formed into a congruent trapezoid, It is a bent pipe formed in a side wall trapezoidal shape in which parallel edges of the trapezoid of the side wall are parallel to the center line of the pipe. The trapezoid of the side wall of one pipe and the side wall of the other pipe constituting the bent pipe is a trapezoid in which the angle formed by each leg of the trapezoid and the edges of the trapezoidal parallel upper and lower bases is not perpendicular. The bent pipe is formed with a rear-end opening edge that opens at the edge that is a leg of a pair of trapezoidal side walls of one pipe, and an edge that is a leg of a pair of trapezoidal side walls of the other pipe It is formed by connecting the front edge opening edge that opens at the end by welding or the like. In the present specification, a pipe having a configuration in which each of a pair of side walls parallel to each other is formed of a plurality of planes with a connecting portion as a boundary is referred to as a bent pipe, and a pair of pipes parallel to each other is referred to as a bent pipe. A tube having a configuration in which each side wall is formed of a curved surface is referred to as a curved tube.
These bent pipes, straight pipes, and bent pipes are formed by, for example, pipes having a quadrangular cross-section when the pipe is cut along a plane orthogonal to the center line (center axis) of the pipe.
As the pipe 2, for example, a steel pipe is used. When the tube 2 is a bent tube or a straight tube having a rectangular cross section, the tube 2 has a length of 1500 mm (a length in the direction along the center line of the tube), and a right and left width of the tube ( The length of the long side of the rectangular cross section is 1240 mm, the vertical width of the pipe (the length of the short side of the rectangular cross section) is 690 mm, and the wall thickness of the pipe is 16 mm. The size of each tube forming the bent tube is, for example, when the tube is a tube having a rectangular cross section, the length of the tube 2 (the length in the direction along the center line of the tube) is a trapezoid. 463 mm on the upper and lower sides of the side wall of the tube, 497 mm on the lower bottom side of the trapezoidal side wall, the horizontal width of the tube is 1240 mm, the vertical width of the tube is 690 mm, and the wall thickness of the tube is 16 mm.
Then, a plurality of curved pipes are sequentially connected and installed in the underground 10 so that a support work that bends and extends so as to draw an arc is constructed in the underground 10 or a plurality of straight pipes are sequentially connected to the ground. A support construction that extends straight by being installed in the middle 10 is constructed in the underground 10 or a plurality of bent pipes are connected in series and installed in the underground 10 to bend at the connecting portion and approximate an arc A support work extending in the manner is constructed in the underground 10.
The support construction constructed in the underground 10 by the pipe installation device 1 and the pipe installation method of the first embodiment includes a pipe 2 positioned at the head (hereinafter referred to as a head pipe) and a plurality of subsequent pipes 2 (hereinafter referred to as subsequent pipes). And). For example, the supporting work is formed by a leading pipe 6 (see FIG. 1; FIG. 4 and the like) positioned at the leading edge and a plurality of subsequent succeeding pipes 7 (see FIG. 4) provided to follow the leading pipe 6. The rear end opening edge and the front end opening edge are constructed by a plurality of pipes 6; 7;
As support work, it straddles between one cavity 100 (see FIG. 1; FIG. 4 etc.) that forms the starting part formed in the underground 10 and the other cavity that is not shown in the figure that forms the reaching part. A plurality of pipes 2 are formed so as to return to the hollow part 100 starting from one hollow part 100 that forms a starting part formed in the underground 10 or a support work constructed by continuously connecting a plurality of pipes 2 to each other. There are support works constructed in a continuous manner, support works constructed so as to start at one of the hollow portions 100 forming the start portion and stop at the underground 10.

Hereinafter, the configuration of the pipe installation device 1 will be described with reference to FIGS. 1 to 3.
For example, as shown in FIG. 1, the leading pipe 6 has a guide blade section that functions as a guide blade section provided at the tip of the pipe 6x. And 9. The guide blade tube 9 is a tube including a blade portion 14 in which one open end edge 13 of the tube is formed sharply.
The leading tube 6 is formed by connecting the other opening end of the guide blade tube 9 and the opening end 8 at the tip of the tube 6x. In this case, for example, the outer diameter of the guide blade tube 9 is larger than the outer diameter of the tube 6x, and the inner periphery of the tube at the opening end surface 15 is located on the other opening end surface 15 side of the guide blade tube 9. The surface side is shaved and a step is provided to form a fitting hole 16 into which the opening end 8 at the tip of the tube 6x is fitted. Then, the opening end 8 at the tip of the tube 6x is fitted into the fitting hole 16 provided in the other opening 17 of the guide blade tube 9, and both of them are connected outside the figure such as bolting and welding. By connecting by means, the other opening end of the guide blade tube 9 and the opening end 8 at the tip of the tube 6x are connected. In this way, the opening end 8 at the tip of the tube 6x is fitted into the fitting hole 16 provided in the other opening 17 of the guide blade tube 9, and the guide blade tube 9 is at the end opening end face 18 of the tube 6x. When the tube 6x is propelled, the tip opening end face 18 of the tube 6x does not receive the resistance of the underground 10 and the propulsion resistance can be reduced. In addition, since the fitting hole 16 for fitting the opening end 8 at the tip of the tube 6x is formed, the guide blade tube 9 can be easily installed at the tip of the tube 6x, and the leading tube 6 is formed. The assembly of the tube 6x and the guide blade tube 9 can be facilitated. In this case, a step is generated between the tube 6x and the guide blade tube 9 on the rectangular outer peripheral surface of the leading tube 6. This step is a watertight performance provided on the rectangular outer peripheral surface of the tube 2 and the inner peripheral surface of the starting port. It is formed small (for example, about 1 cm) so that the water stop performance can be maintained by the maintenance member.

The outer diameter of the guide blade tube 9 and the tube 6x is the same diameter, and the boundary portion of the guide blade tube 9 is welded all around with the other opening end surface of the guide blade tube 9 and the tip opening end surface 18 of the tube 6x abutting each other. Alternatively, the leading pipe 6 may be formed by spot welding.
Alternatively, a tube formed on a guide blade portion whose tip side functions as the guide blade tube 9 may be used as the leading tube 6.
In this way, the step on the rectangular outer peripheral surface of the leading pipe 6 can be reduced or no step occurs, so that the water stoppage by the watertight performance maintaining member provided on the rectangular outer peripheral surface of the pipe 2 and the inner peripheral surface of the starting port is provided. Good performance can be maintained.

  On the inner surface 20 of the pipe of the leading pipe 6, a pipe-side propulsive force receiving portion 21 is provided at a position on the leading side with respect to the central portion in the tube extending direction (the direction along the center line of the pipe). The tube side propulsive force receiving portion 21 receives the propulsive force from the propulsion device 4 via a substrate 25 provided in the excavating device 3 to be described later and propels the top tube 6. The tube-side propulsive force receiving portion 21 is formed to have a rectangular frame outer peripheral size corresponding to a rectangular shape that goes around the inner surface of the cross section of the front tube 6 (a cross section when the front tube is cut along a plane orthogonal to the center line of the front tube). The rectangular frame 22 is formed by the rectangular frame 22, and the rectangular frame 22 is installed in a state where the outer peripheral surface 23 of the rectangular frame 22 and the inner peripheral surface 20 a of the tube of the leading tube 6 correspond to each other. Is fixed to the inner peripheral surface 20a by a connecting means (not shown) such as welding, bolts and nuts.

The excavation apparatus 3 includes a substrate 25, an excavation machine 26, a drive source 27, a water supply mechanism 75, and a mud discharge mechanism 76.
The substrate 25 is disposed so that the center line of the top tube 6 and the center line of the substrate 25 coincide with each other, and is provided so as to be movable in the front-rear direction within the top tube 6. The substrate 25 is formed by a rectangular plate 30 corresponding to a rectangular shape that goes around the inner surface of the cross section of the top tube 6. The size of the rectangular plate 30 is smaller than the rectangular dimension that goes around the inner surface of the cross section of the leading pipe 6 and is larger than the rectangular inner peripheral dimension of the rectangular frame 22 that forms the tube-side propulsive force receiving portion 21. Is also big. That is, the rectangular peripheral surface 33 on the front surface 39 f of the rectangular plate 30 that forms the substrate 25 and the frame rear surface 32 of the rectangular frame 22 that forms the tube-side thrust receiving portion 21 are formed to face each other. In addition, between the rectangular peripheral surface 33 in the front surface 39f of the rectangular plate 30 which forms the board | substrate 25, and the frame rear surface 32 of the rectangular frame 22 which forms the tube side thrust receiving part 21, the watertight formed by the elastic body, for example A performance maintaining member (packing) 35 is provided. The watertight performance maintaining member 35 is, for example, a rectangular attached to the rectangular peripheral surface 33 on the front surface 39f of the rectangular plate 30 forming the substrate 25 or the frame rear surface 32 of the rectangular frame 22 forming the tube side propulsive force receiving portion 21. The frame 36 is formed. Therefore, the propulsive force transmitted to the substrate 25 is transmitted to the pipe-side propulsive force receiving portion 21 via the watertight performance maintaining member 35, whereby the pipe 2 and the excavating machine 26 are propelled together.
One end of the support portion 40 of the excavating machine 26 is fixed to the central portion of the front surface 39 f of the substrate 25.
In addition, a through hole 38a is formed in the central portion of the substrate 25 so as to penetrate a pressure hose 56 described later.

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. For example, a mounting flange (not shown) is provided at one end of the column 42, and the mounting flange is detachably fixed to the center of the front surface 39f of the substrate 25 by a fixing tool such as a bolt and a nut. One end is fixed to the center of the front surface 39f of the substrate 25, and the support column 42 extends in a direction orthogonal to the front surface 39f of the substrate 25. 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 tip end portion (the other end portion) of the columns 42. That is, one end of the support column 42 is fixed to the substrate 25 so that the T-shaped hollow path of the support portion 40 communicates with the through hole 38a. A motor mount 44 is provided at each end of the branch column 43.

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. A casing 48 of a motor 47 is fixed to each motor mount 44;
The rotating shafts 49; 49 of the two motors 47; 47 extend in a direction away from each other on a straight line perpendicular to the extending direction of the support column from the tip end portion of the support column 42.
The rotary excavator 46 includes a housing 50 that is closed at one end and the other end, and a plurality of excavation bits (excavation blades) 52 provided on the outer peripheral surface 51 of the housing 50.

  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 through hole 38 a and 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 other end closed inner surface 53 of the casing 50 and the hydraulic pressure are adjusted so that the center of the other end closed inner surface (inner bottom surface of the casing) 53 of the casing 50 of the rotary excavator 46 coincides with the rotation center of the rotary shaft 49. A connecting plate 54 provided at the tip of a rotating shaft 49 rotated by a motor 47 is connected by a connecting tool 57 such as a screw.
In other words, the two rotary excavating bodies 46 are configured to rotate around a single rotation center line L common to the two rotation shafts 49 and 49. That is, the two rotary excavating bodies 46 and 46 that rotate about the rotation center line L orthogonal to the propulsion direction of the leading pipe 6 are provided. Such a configuration including two rotary excavating bodies 46; 46 is called a twin header. When a so-called twin header provided with two rotary excavating bodies 46; 46 rotating around the rotation center line L orthogonal to the propulsion direction of the leading pipe 6 is used, the rotary excavating body 46 in a plane orthogonal to the propulsion direction is used. Therefore, it becomes possible to easily install the pipe 2 having a rectangular width corresponding to the excavation width in the underground 10.

In addition, what is necessary is just to adjust suitably the front-back position of the rotary excavation body 46; 46 by changing the installation position of the pipe side thrust receiving part 21 back and forth.
For example, as shown in FIG. 1, the rotary excavator 46; 46 so that the tip 80 of the excavation bit 52 and the cutting edge 81 of the guide blade tube 9 are located on one plane orthogonal to the central axis of the guide blade tube 9. Although not shown, the rotary excavator 46; 46 is installed so that the tip 80 of the excavation bit 52 protrudes forward from the cutting edge 81 of the guide blade tube 9, or the tip 80 of the excavation bit 52 is The rotary excavator 46; 46 is installed so as to be located in the leading pipe 6.

  If the excavating operation of the rotary excavating body 46; 46 is performed by causing the tip 80 of the excavating bit 52 to protrude forward from the cutting edge 81 of the guide blade tube 9, the ground located in front of the cutting edge of the guide blade tube 9 is excavated. Since the excavation can be surely performed by the bit 52, it is possible to reduce a situation in which the cutting edge 81 of the guide blade tube 9 collides with the hard ground and the leading tube 6 cannot be pushed. For example, the rotary excavator is configured such that the tip 80 of the excavation bit 52 projects forward from the cutting edge 81 of the guide blade tube 9 so that the rotation center axis L and the cutting edge 81 of the guide blade tube 9 are located on the same plane. If the excavation operation by 46; 46 is performed, the ground located in front of the cutting edge of the guide blade tube 9 can be more reliably excavated by the excavation bit 52, and the tube 2 can be more easily propelled. Installation work can be performed more smoothly.

  Further, if the leading pipe 6 is propelled and the rotary excavating body 46; 46 is excavated with the tip 80 of the excavating bit 52 positioned in the leading pipe 6, the guide blade pipe 9 pierced into the ground 10 is used. Since only the underground part that enters the inside of the blade edge is excavated by the excavation bit 52, the excessive excavation part of the underground 10 is reduced, and the influence on the underground 10 such as ground subsidence can be reduced.

A fixed excavator 77 is provided between the rotary excavators 46;
The fixed excavation body 77 is attached in a fixed state to the front outer peripheral surface of the boundary portion between the two branch columns 43; 43 so as to protrude forward from the branch column 43 by fixing means such as welding or bolts and nuts.
The fixed excavation body 77 is formed in, for example, a curved shape in which the central portion between the upper and lower sides bulges toward the cutting edge 81 side of the guide blade tube 9, and the center between the left and right widths of the curved surface is along the circumferential direction of the curved surface. It is the structure formed so that it might become a continuous sharp blade shape.
Thus, since the fixed excavation body 77 has a configuration in which the central portion between the upper and lower sides is formed in a curved shape that bulges toward the cutting edge 81 side of the guide blade tube 9, the resistance of the ground when the leading tube 6 is propelled. Thus, the leading pipe 6 can be more smoothly propelled.

When the fixed excavation body 77 is not provided, the excavated earth and sand may be clogged between the rotary excavation bodies 46; 46, but the fixed excavation body 77 is interposed between the rotary excavation bodies 46; 46. When the fixed excavation body 77 collides with the ground by propelling the head pipe 6, the fixed excavation body 77 cuts the ground or distributes the earth and sand and rocks in the collided ground portion to the left and right. 46; 46, so that the leading pipe 6 can be more smoothly propelled.
For example, as shown in FIG. 1, the center between the upper and lower sides of the fixed excavation body 77, the excavation bit 52 of the rotary excavation body 46, and the cutting edge 81 of the guide blade tube 9 are on the same plane perpendicular to the central axis of the top tube 6. Configured to be located.
In this way, the center between the upper and lower sides of the fixed excavation body 77, the excavation bit 52 of the rotary excavation body 46, and the cutting edge 81 of the guide blade tube 9 are configured to be located on the same plane perpendicular to the central axis of the top tube 6. In this case, as described above, the fixed excavation body 77 can be easily excavated by inducing cracks in the ground prior to excavation, and the fixed excavation body 77 collides with the ground and the top pipe It can also be prevented that 6 is not promoted.

In addition, you may comprise so that the center between the upper and lower sides of the fixed excavation body 77 may be located behind or ahead of the excavation bit 52 of the rotary excavation body 46 and the cutting edge 81 of the guide blade tube 9.
When the center between the upper and lower sides of the fixed excavation body 77 is configured to be positioned in front of the excavation bit 52 of the rotary excavation body 46 and the cutting edge 81 of the guide blade tube 9, the fixed excavation body 77 is placed on the ground prior to excavation. The effect that it becomes easy to excavate by inducing a crack is also acquired.
Conversely, if the center between the upper and lower sides of the fixed excavation body 77 is positioned behind the excavation bit 52 of the rotary excavation body 46 and the cutting edge 81 of the guide blade tube 9, excavation is performed when the ground is hard. It can be prevented that the fixed excavation body 77 collides with the ground before the cutting edge 81 of the bit 52 or the guide blade tube 9 and the leading tube 6 is not propelled.

  Further, the tip shape of the fixed excavation body 77 is such that the top pipe 6 collides with the ground by cutting the ground, and the left and right rotary excavation bodies 46 are distributed by dividing the earth and sand on the collided ground portion to the left and right; It may be formed in a shape that can achieve the role of directing to 46, or inducing cracks in the ground prior to excavation to facilitate excavation. For example, as described above, the tip of the front tip may be formed in a sharp blade shape, or the tip of the front tip may be formed in a plane shape, and the shape is such that the ground is easily excavated and broken depending on the geology of the ground. Should be selected.

Further, since the casing 50 of the rotary excavator 46 is installed away from the left and right inner surfaces of the guide blade tube 9 so as not to contact the left and right inner surfaces of the guide blade tube 9, It may be difficult to excavate the ground between the inner surface.
Therefore, the excavation bit 52 located on the center side of the leading pipe 6 is provided so as to extend in a direction orthogonal to the central axis (center line L) of the housing 50, and as shown in FIGS. The excavation bit 52a (52) located on the left side of the leading pipe 6 is provided to extend to the left side of the leading pipe 6 as close as possible to the position on the left inner surface of the guide blade pipe 9, and is further located on the right side of the leading pipe 6. The excavation bit 52b (52) is extended to the right side of the leading pipe 6 as far as possible to a position as close to the right inner surface of the guide blade tube 9 as possible. The ground located at the left and right corners of the front pipe 6 can be excavated more effectively.

The water supply mechanism 75 includes a water storage tank 75a, a water supply hole 75b penetrating through the front surface 39f and the rear surface 39 of the substrate 25, a water supply pipe 75c formed of, for example, a bellows tube or a steel pipe, and a pump for water supply. 75d and a connecting pipe 75e.
For example, one end of the water supply pipe 75c is connected to the inside of the water supply hole 75b so that the one end opening of the water supply pipe 75c communicates with the space 69 surrounded by the front surface 39f of the substrate 25 and the inner surface 20 of the leading pipe 6. The water supply hole 75b and one end of the water supply pipe 75c are coupled by screwing. The other end opening of the water supply pipe 75c and the discharge port of the water supply pump 75d are connected so as to communicate with each other, and the suction port of the water supply pump 75d and the water storage tank 75a are connected so as to communicate with each other through the connection pipe 75e. Is done.

The mud drain mechanism 76 includes a mud hole 76a penetrating the front surface 39f and the rear surface 39 of the substrate 25, a mud pipe 76b formed of, for example, a bellows tube or a steel pipe, a pump 76c for draining mud, A tank 76d and a connecting pipe 76e are provided.
For example, one end of the mud pipe 76b is screwed inside the mud hole 76a so that the one end opening of the mud pipe 76b communicates with the space 69, so that the mud hole 76a and the mud pipe 76b are connected. One end is joined. The other end opening of the mud pipe 76b and the suction port of the mud pump 76c are connected so as to communicate with each other, and the discharge port of the mud pump 76c and the mud tank 76d can be communicated with each other through the connecting pipe 76e. Connected to

The water storage tank 75a and the waste mud tank 76d are constituted by a collective tank 75X in which the water storage tank 75a and the waste mud tank 76d are integrated. 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 waste mud tank 76d.
That is, when a certain amount of water is initially filled in the collecting tank 75X, and the water pump 75d is driven to pump water into the space 69, the water pumped into the space 69 and the excavating machine 26 excavate. Muddy water is mixed with the earth and sand. Then, the mud water in the space 69 is discharged into the mud tank 76d by driving the mud pump 76c. Mud in the mud discharged to the waste mud tank 76d settles at the bottom of the waste mud tank 76d, and the mud that has entered the water storage tank 75a beyond the partition 75w is again put into the space 69 by the pump 75d for water supply. Pumped. That is, since the muddy water can be circulated and supplied into the space 69, the amount of water used can be reduced. Further, since muddy water having a specific gravity greater than that of water can be supplied into the space 69, the pressure of the ground and groundwater can be resisted, and the pressure of the ground and groundwater and the pressure in the space 69 can be easily equalized. , The influence on the underground 10 can be reduced. Moreover, since the inside of the space 69 becomes muddy water, the mud can be drained smoothly and excavation is facilitated.

The coupling structure between the water supply hole 75b and one end of the water supply pipe 75c and the coupling structure between the mud hole 76a and one end of the mud pipe 76b may be the following coupling structure. An unillustrated pipe portion communicating with the holes (water supply hole 75b, mud drain hole 76a) is formed on the rear surface 39 of the substrate, and the opening end face of the pipe portion and the pipe (water supply pipe 75c, mud drain pipe 76b). In the state where the end face of the open end of the pipe is abutted with each other, the pipe part and the pipe are joined by covering the abutting portion with the annular joint member, or the pipe part is fitted into the pipe through the one end opening of the pipe The pipe part and the pipe are joined by tightening the outer peripheral surface of the one end opening of the pipe with an annular clip member.
The muddy water may be filled in the collecting tank 75X from the beginning, and the muddy water may be circulated between the space 69 and the collecting tank 75X by driving the pump 75d for water supply.

  The propulsion device 4 includes, for example, one of a pair of outer side surfaces 6a and 6b that are opposed to each other in parallel with each other in a pipe 2 having a quadrangular cross section installed on a guide base 90 provided in a cavity 100 as a starting portion. A left hydraulic jack 62 disposed so that the cylinder 66 and the piston rod 63 extend in the same direction as the extension direction of the pipe 2 beside the left outer face 6a, which is one outer face, and the pipe 2 are mutually connected. The cylinder 66 and the piston rod 63 extend in the same direction as the extension direction of the tube 2 on the outer side of the right outer surface 6b which is the other outer surface of the pair of outer surfaces 6a; And a right hydraulic jack 62 disposed on the right side. A pressing plate 64 is provided at the tip of the piston rod 63 of the hydraulic jack 62.

The propulsive force transmission device 70 that receives the pressing force from the propulsion device 4 at the lateral position of the outer surface of the tube 2 installed at the starting portion and transmits the pressing force to the tube 2 is, for example, a pair of propulsion force transmission members 85. 85, a propulsive force transmission rod-shaped body 710, the above-described substrate 25, the above-described watertight performance maintaining member 35, and the above-described tube-side propulsive force receiving portion 21.
The left propulsive force transmitting member 85 as one propulsive force transmitting member is provided outside the left outer surface 6a of the tube 2 having a quadrangular cross section installed on the guide base 90 provided in the cavity 100 as the starting portion. A transmission body 71 disposed so as to face the left outer surface 6a in parallel and a left hydraulic jack provided to extend in a direction away from the left outer surface 6a of the pipe 2 on one end side of the transmission body 71 The force receiving portion 72 that receives the pressing force from 62 and the other end 71f of the rod-shaped body 71x of the left propulsive force transmitting rod-shaped body 71A described later on the other end side of the transmitting body 71 are provided so as to contact the force receiving section. And a pressing portion 73 that transmits the force transmitted through the portion 72 and the transmission body 71 to the rod-shaped body 71x.
The right propulsive force transmitting member 85 as the other propulsive force transmitting member is located outside the right outer surface 6b of the tube 2 having a quadrangular cross section installed on the guide base 90 provided in the cavity 100 as the starting portion. A transmission body 71 arranged so as to face the right outer surface 6b in parallel, and a right hydraulic jack provided to extend in a direction away from the right outer surface 6b of the pipe 2 on one end side of the transmission body 71 The force receiving portion 72 that receives the pressing force from 62 and the other end 71f of the rod-shaped body 71x of the right propulsive force transmitting rod-shaped body 71B described later on the other end side of the transmitting body 71 are provided so as to contact the force receiving section. And a pressing portion 73 that transmits the force transmitted through the portion 72 and the transmission body 71 to the rod-shaped body 71x.
The left propulsive force transmission member 85 and the right propulsive force transmission member 85 have the same configuration, for example. Thus, by using the same configuration, the left propulsive force transmission member 85 can be used as the right propulsive force transmission member 85, or the right propulsive force transmission member 85 can be used as the left propulsive force transmission member 85. Can be used and is easy to use. Further, since only one type of propulsive force transmission member 85 needs to be manufactured, the mass productivity is excellent.
The propulsive force transmitting rod-like body 710 includes a rod-like body 71x having a length from one end 71e to the other end 71f longer than the shortest distance between the rear surface 39 of the substrate 25 and the rear end 6e of the leading tube 6. An inclination preventing portion 71c protruding from the other end 71f side of 71x. The rod-shaped body 71x uses, for example, H-section steel, and the tilt prevention portion 71c uses, for example, a steel material that is joined to the H-section steel forming the rod-shaped body 71x by connection means such as welding or bolts. The tilt preventing portion 71c includes a face body 71d having a surface in contact with the left inner surface and the right inner surface of the leading pipe 6.
The propulsive force transmission rod-shaped body 710 is installed so that the center line of the rod-shaped body 71x faces the same direction as the center line of the top tube 6, and the surface of the face member 71d and the left inner surface and the right inner surface of the head tube 6 The one end 71e and the rear surface 39 of the substrate 25 are joined by connection means such as welding or a bolt so that the two come into surface contact with each other.
That is, the left propulsive force transmitting rod-shaped body 71A is installed so that the center line of the rod-shaped body 71x faces the same direction as the center line of the top tube 6, and the left propulsive force transmitting rod-shaped body 71A has a surface of the face 71d. One end 71e of the rod-shaped body 71x of the left propulsive force transmitting rod-shaped body 71A and the rear surface 39 of the substrate 25 are joined by a connecting means such as welding or a bolt so that the left inner surface of the front pipe 6 is in surface contact. The center line of the rod-shaped body 71x of the right propulsive force transmission rod-shaped body 71B is installed so as to face the same direction as the center line of the top tube 6, and the surface of the face body 71d of the right thrust-force transmission rod-shaped body 71B One end 71e of the rod-shaped body 71x of the right propulsive force transmitting rod-shaped body 71B and the rear surface 39 of the substrate 25 are joined by connection means such as welding or a bolt so that the right inner surface of the front pipe 6 is in surface contact.
One ends 71e; 71e of the left and right propulsive force transmission rod-like bodies 71A; 71B are coupled to the central portion between the upper and lower edges of the substrate 25.
According to the propulsion force transmission device 70 having the above-described configuration, the right and left propulsion force transmission members 85; 85, the left and right propulsion force transmission rods 71A; 71B, the substrate 25, Since the pipe 2 is propelled by being transmitted to the pipe 2 via the watertight performance maintaining member 35 and the pipe-side propulsive force receiving portion 21, it becomes possible to apply a pressing force evenly to the left and right of the pipe 2.

The guide stand 90 is provided in order to receive a reaction force transmitted from the pipe 2 to the hydraulic jack 62; 62 when the pipe 2 is pressed by the left and right hydraulic jacks 62; 62 in the cavity 100 as a starting part. It is installed between the force receiving wall 74 and an unillustrated starting port (called entrance port) from the cavity 100 to the underground 10.
The starting port through which the tube 2 enters and exits is a frame having an opening through which the tube 2 passes, and a tube passing through the opening by being in contact with the outer peripheral surface of the tube 2 provided at the inner periphery of the opening of the frame. It is the structure provided with the watertight performance maintenance member for maintaining the watertight performance with an outer peripheral surface.
The guide table 90 includes a guide surface 91 on which the tube 2 is placed and guides the tube 2 to the departure port of the departure portion, and left and right installation platforms 92; 92 provided on the left and right sides of the guide surface 91. Is provided. The installation table 92 is configured by a table provided so as to rise from the side of the guide surface 91.
Movement of the pipe 2 placed between the inner side surfaces 92a; 92a on the guide surface 91 in the left-right direction is restricted by the inner side surfaces 92a; The
A left hydraulic jack 62 is fixed to the rear side of the top surface of the left installation base 92 by a fixture 67 and the right hydraulic jack 62 is fixed to the rear side of the top surface of the right installation base 92. It is fixed by 67 etc. The hydraulic jack 62 is installed on the top surface of the installation base 92 in an inclined state according to the angle of entry of the pipe 2 into the ground 10, so that the bottom surface of the cylinder 66 of the hydraulic jack 62 is attached to the reaction force receiving wall 74. It is in a state inclined with respect to the front surface. Therefore, a contact plate 79; 79 that contacts the bottom surface of the cylinder 66 is provided on the front surface of the reaction force receiving wall 74.
The force receiving portion 72 of the left propulsive force transmission member 85 is positioned in front of the left hydraulic jack 62 on the rear side of the upper surface of the left installation base 92 and the pressing portion 73 of the left propulsive force transmission member 85. However, the left propulsive force transmission member 85 is installed so as to come into contact with the other end 71f of the rod-like body 71x of the left propulsive force-transmitting rod-like body 71A.
Further, the force receiving portion 72 of the right propulsive force transmitting member 85 is positioned in front of the right hydraulic jack 62 on the rear side of the upper surface of the right installation base 92 and is pressed by the right propulsive force transmitting member 85. The right propulsive force transmission member 85 is installed so that the portion 73 contacts the other end 71f of the rod-like body 71x of the right propulsive force-transmitting rod-like body 71B.

In the case where a straight pipe is mounted as the pipe 2, the guide base 90 is formed with the guide surface 91 and the upper surfaces of the left and right installation bases 92; When a straight tube is used and a bent tube or a bent tube is mounted as the tube 2, as shown in FIG. 6, the guide surface 91 and the upper surfaces of the left and right installation bases 92; A configuration in which the groove 93 is formed in a curved surface in accordance with the curvature and extends in a curved manner along the extending direction of the installation base 92 is used. Moreover, a pipe entry angle setting means 95 (see FIGS. 5 and 6) for determining the installation inclination angle of the guide surface 91 in accordance with the entry angle of the pipe 2 to the underground 10 is provided. For example, the pipe entry angle setting means 95 is configured by a support base, a support frame, or the like that is detachably provided on the lower surface of the guide table 90 or that is integrally formed on the lower surface of the guide table 90. It is constituted by a support stand, a support frame, etc., which are integrally formed on the lower surface of the guide stand 90.
Furthermore, the outer side surfaces 92b; 92b of the left and right installation bases 92; 92 (the side surfaces facing in parallel to the inner side surface 92a and the left and right side surfaces of the guide base 90) have a concave cross section that opens to the outer side surface 92. A concave groove 93 extending in the extending direction (front-rear direction) of the installation base 92 is provided. The front end surface of the installation base 92 corresponding to the front end of each concave groove 93; 93 of the guide base 90 is formed in an opening 93 a, and the travel means 114 of the pressing member 110 described later passes through the opening 93 a in the concave groove 93. Inserted into.
In addition, each support | pillar 111; 111 provided with the travel means 114 of the pressing member 110 mentioned later and the beam material 112 are comprised so that decomposition | disassembly is possible, and the travel means 114 of each support | pillar 111 is inserted in the recessed groove 93. It is also possible to assemble the pressing member 110 by connecting the upper ends of the columns 111; 111 with the beam material 112 in a state where the columns 111; 111 are erected. The front end surface of the installation base 92 corresponding to the front end of 93 and the concave grooves 93 of the guide base 90; the rear end surface of the installation base 92 corresponding to the rear end of 93 may be closed.

As shown in FIG. 5; FIG. 6, the propulsive force transmission member 85 is configured by combining a transmission body 71, a force receiving portion 72, and a pressing portion 73 that are separately configured of, for example, steel materials.
The transmission body 71 is configured by combining, for example, section steel. And the force receiving part 72 is extended in the direction orthogonal to the said one outer surface from the one end side of the extension direction of the transmission body 71 in one outer side surface 71a of a pair of outer surfaces which the transmission body 71 mutually opposes. The pressing portion 73 is orthogonal to the other outer surface 71b from the other end side in the extending direction of the transmitting body 71 on the other outer surface 71b of the pair of outer surfaces facing each other of the transmitting body 71. It is provided to extend in the direction. That is, the force receiving portion 72 and the pressing portion 73 are provided so as to extend in directions away from the outer side surfaces 71a; 71b of the transmission body 71.
The force receiving portion 72 includes a connecting plate 72a that is connected to one end of one outer surface 71a of the transmission body 71 by connecting means such as a bolt, a nut, or welding, and a force receiving plate 72b that receives the pressing force of the hydraulic jack 62. And a reinforcing plate 72c for connecting the connecting plate 72a and the force receiving plate 72b. The connecting plate 72a is formed by a flat plate that comes into surface contact with one outer surface 71a parallel to the extending direction of the transmission body 71 and is connected to one end side of the one outer surface 71a. The force receiving plate 72 b is formed by a flat plate that forms a surface orthogonal to one outer surface 71 a parallel to the extending direction of the transmission body 71.
The pressing portion 73 includes a connecting plate 73a connected to the other end side of the other outer surface 71b of the transmitting body 71 by connecting means such as a bolt, a nut, or welding, and the other end of the rod-shaped body 71x of the propulsive force transmitting rod-shaped body 710. A pressing plate 73b that comes into contact with 71f and a reinforcing plate 73c that connects the connecting plate 73a and the pressing plate 73b are provided. The connecting plate 73a is formed by a flat plate that comes into surface contact with the other outer surface 71b parallel to the extending direction of the transmission body 71 and is connected to the other end side of the other outer surface 71b. The pressing plate 73 b is formed by a flat plate that forms a surface orthogonal to the other outer surface 71 b parallel to the extending direction of the transmission body 71.

In addition, since the excavating machine 26 is installed inside the first pipe 6 that is first installed in the ground 10, the first pipe 6 should have a length longer than that of the subsequent pipe 7. However, conventionally, when propelling such a long pipe 6, the hydraulic pipe 62 cannot be installed behind the pipe 6 because the pipe 6 is long. In some cases, the front pipe 6 cannot be propelled, or only a small hydraulic jack with a short piston rod extension stroke can be installed behind the front pipe 6. When only a short and small hydraulic jack can be installed, the top pipe 6 can be pushed a little by one maximum extension operation of the piston rod of the hydraulic jack, so the piston lock of the hydraulic jack A hydraulic jack is repeated many times by interposing a spacer (not shown) between the tip of the rod and the other end 71f of the rod-like body 71x, or every time the extension operation of the hydraulic jack ends. In addition, it is necessary to move the hydraulic jack reaction force receiving wall 74 forward and repeat the extension operation of the hydraulic jack many times, and the working efficiency of the hydraulic jack when propelling the top pipe 6 to the ground 10 is poor.
According to the first embodiment, since the hydraulic jacks 62; 62 can be installed beside the left and right outer surfaces 6a; 6b of the leading pipe 6 installed at the starting portion, they are located behind the leading pipe 6 installed at the starting portion. Even when the hydraulic jack 62 cannot be installed, the leading pipe 6 can be propelled, and a piston rod 63 having a long extension stroke can be used as the hydraulic jack 62. The leading pipe 6 can be moved a long distance by the maximum extending operation, and the working efficiency by the hydraulic jack 62 can be improved.

As shown in FIG. 5; FIG. 6, the pressing member 110 includes a pair of struts 111; 111 and a pair of struts, which are provided to face each other in parallel with a distance wider than the left-right width distance of the guide table 90. 111; A structure including a portal body 113 provided with a beam member 112 that connects upper end portions of 111, traveling means 114 provided on the lower end portions of the pair of support columns 111; 111, and a connecting member 120, respectively. It is.
The gate-shaped body 113 is configured by combining a support column 111 and a beam member 112 using, for example, a section steel such as an H-section steel.
The traveling means 114 includes a base 115 fixed to inner surfaces facing each other at the lower ends of the respective columns 111; 111, and a wheel 116 rotatably provided on the base 115 via a rotation center axis. .
The base table 115 is formed of a long member having a concave cross section, for example, provided with rising plates extending vertically in the same direction with respect to the long plate at both long side edges of the long plate. The member is attached with the opening of the recess facing upward so that the member extends in a direction perpendicular to the extending direction of the column 111 and extends in parallel with the side surface of the tube 2.
For example, a base plate of a caster provided with a wheel 116 is fixed to a long plate that forms the bottom of the recess of the base stand 115, and the wheel 116 protrudes upward from the rising plate through the opening of the recess from the bottom of the recess. To be provided. For example, two wheels 116 are provided at intervals along the extending direction of the base table 115.

  The traveling means 114 provided at the lower end of each column 111; 111 is inserted into the left and right installation bases 92; 92 of the guide base 90 through the recessed grooves 93 of the guide base 90 through the opening 93a, and the guide surface 91 under the beam 112 is provided. By inserting the connecting member 120 between the upper surface 6u of the pipe 2 placed on the top and the beam member 112, the upper wall surface 93t as the running surface of the concave groove 93 and the outer peripheral surface of the wheel 116 are brought into contact with each other. When the pipe 2 travels, the portal body 113 including the traveling means 114 and the connecting member 120 are configured to travel together.

  That is, the rear end 6e of the pipe 2 remaining in the cavity 100 as a starting portion after the pipe 2 enters the underground 10 from the tip moves in a direction intersecting the central axis of the pipe 2 (for example, the rear end of the pipe 2). 6e, the pipe rear end movement restricting means 200 is provided, and the pipe rear end movement restricting means 200 engages with the wheel 116 of the pressing member 110 and forms a traveling surface of the wheel 116. A guide 90 having a groove 93 and a wheel 116 are engaged with the concave groove 93 so that the wheel 116 does not come off from the concave groove 93 in a direction perpendicular to the extending direction of the concave groove 93. Is located above the pipe 2 so as to face the upper surface 6u of the pipe 2 placed on the guide surface 91 (the outer surface of the pipe 2), the beam 112 of the portal form 113 and the pipe 2 Is inserted between the upper surface 6u and the beam material 112 is pushed. The outer peripheral surface of the Gaité wheel 116 is a structure in which a connecting member 120 into contact with the upper wall surface 93t of the concave groove 93.

  In other words, the connecting member 120 is inserted between the tube 2 and the beam member 112 so as to bite like a wedge, and comes into close contact with the tube 2 and the beam member 112, so that the tube 2 is advanced when the tube 2 advances. Is transmitted to the pressing member 110 so that the wheel 116 of the pressing member 110 can travel on the traveling surface formed by the upper wall surface 93t of the concave groove 93 and the outer peripheral surface of the wheel 116. It is a member which contacts the upper wall surface 93t. The connecting member 120 is, for example, a contact plate 121 brought into contact with the upper surface 6 u of the pipe 2, and is bitten like a wedge between the contact plate 121 and the beam material 112 to push up the beam material 112 to raise the contact plate 121 and the beam material. 112 and a square member 122 that contacts the upper wall surface 93 t of the concave groove 93.

That is, a gate provided with a pair of pillars 111; 111 facing each other and a beam member 112 connecting the upper ends of the pillars 111; 111 and traveling means 114; 114 provided at the lower ends of the pillars 111; 111. Form 113, guide stand 90 provided with a concave groove 93 into which each traveling means 114 provided at the lower end of each support column 111 of the pressing member 110 is inserted, and a pipe installed on the guide surface 91 of the guide stand 90 2 and the beam member 112 of the gate-shaped body 113 are inserted so as to bite like a wedge so that the tube 2 and the beam member 112 are brought into close contact with each other and the wheel 116 of the gate-shaped body 113 can travel on the traveling surface. When the pipe 2 enters the underground 10 from the tip, the cavity that is the starting part is provided by the provision of the pipe rear end movement restricting means 200 constituted by the connecting member 120 that brings the outer peripheral surface of the pipe into contact with the upper wall surface 93t. Part 1 Rear 6e of the remaining tubes 2 to 0 the tube 2 in a state of being held down so as not to move in a direction away from the guide surface 91 by a tube rear movement restricting means 200 is driven into the ground 10. That is, when the pipe 2 is installed in the ground 10 from the tip, the rear end movement restricting means 200 prevents the rear end of the pipe 2 remaining at the starting portion from rising.
That is, in the first embodiment, a guide base 90 having a guide surface 91 for contacting the lower surface (outer surface) which is one outer surface of the tube 2 and guiding the tube 2 to the departure port of the departure portion, Pipe rear end movement restriction that restricts movement of the rear end 6e of the pipe 2 remaining in the starting portion after the pipe 2 enters the underground 10 from the front end via the starting port in a direction intersecting the center line of the pipe 2. The pipe rear end movement restricting means 200 is movable along with the pipe 2 while pressing the pipe 2 so as to press the pipe 2 installed on the guide face 91 against the guide face 91, and the guide stand 90. It is comprised by the pressing member 110 provided so that it could move with respect to.

Next, with reference to FIG. 4, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated.
Here, it is assumed that the pipe length of the leading pipe 6 is longer than that of the succeeding pipe 7, and the succeeding pipe 7 having a pipe length approximately half the length of the leading pipe 6 is used as the trailing pipe 7. An example will be described.
The substrate 25 to which the excavating machine 26, the propulsion force transmission rod 71, the water supply pipe 75 c and the mud pipe 76 b are attached is installed inside the top pipe 6. That is, the rectangular peripheral surface 33 on the front surface 39 f of the rectangular plate 30 that forms the substrate 25 is arranged on the frame rear surface 32 of the rectangular frame 22 that forms the tube-side propulsive force receiving portion 21 inside the top tube 6. It is installed so that it is in a state of being pushed through. As a result, when the pipe 2 is installed in the underground 10 from the cavity 100 formed in the underground 10, the excavating machine 26 is installed inside the tip opening 6t side of the leading pipe 6 that is first inserted into the underground 10. Is done.
As shown in FIG. 4 (a), in the hollow portion 100 as the starting portion, a guide stand 90 is installed on the front side of the starting entrance (entrance entrance) to the underground 10 of the top pipe 6, and the excavating machine 26 and the water The leading pipe 6 is installed on the guide surface 91 with the tip opening 6t of the leading pipe 6 on which the substrate 25, to which the supply pipe 75c and the mud drain pipe 76b are attached, is installed on the inside, is directed to the starting port.
In addition, the guide stand 90 is fixed to the ground of the departure portion with an anchor or the like so that the pipe 2 installed on the guide surface 91 does not move when moving on the guide surface 91, or increases its own weight. For this purpose, a weight is added to the guide 90, or a heavy guide 90 with an increased weight is used.
The traveling means 114 of the pressing member 110 is inserted into the concave grooves 93 of the left and right installation bases 92; 92 from the opening 93a, and the upper surface of the leading pipe 6 placed on the guide surface 91 below the beam member 112. The connecting member 120 is inserted between 6 u and the beam member 112, and the upper wall surface 93 t as a running surface of the concave groove 93 and the outer peripheral surface of the wheel 116 are brought into contact with each other.
In addition, the left hydraulic jack 62 is fixed to the rear side of the upper surface of the left installation table 92, and the right hydraulic jack 62 is fixed to the rear side of the upper surface of the right installation table 92. Further, the left propulsive force transmission member 85 is installed so that the transmission body 71 faces the rear side of the left side surface 6 a of the leading pipe 6 in parallel, and the transmission body 71 is parallel to the rear side of the right side surface 6 b of the leading pipe 6. The right propulsive force transmission member 85 is installed so as to oppose to.

  4B, the excavating machine 26 and the left and right hydraulic jacks 62; 62 are operated, so that the pressing plate 64 at the tip of the piston rod 63 becomes the force receiving plate 72b of the propulsive force transmitting member 85. At the same time, the pressing plate 73b of the propulsive force transmitting member 85 comes into contact with the other end 71f of the rod-like body 71x, and the leading pipe 6 advances to the ground 10 as the piston rod 63 extends. That is, the water supply pump 75d shown in FIG. 1 is driven to supply muddy water into the space 69, and the muddy water is circulated between the space 69 and the collecting tank 75X. The propulsive force transmitted to the top pipe 6 via the propulsive force transmission device 70 is achieved by extending the piston rod 63 of the hydraulic jack 62 while supplying the hydraulic oil from the hydraulic motor 47 to the hydraulic motor 47 and rotating the rotary excavator 46. And the ground excavation accompanying the rotation of the rotary excavator 46 propels the front pipe 6 forward, and the front pipe 6 is installed in the ground 10. The earth and sand excavated by the rotary excavator 46; 46 in the ground 10 are mixed with water in the space 69 to become muddy water and discharged to the mud tank 76d. When the leading pipe 6 advances, the connecting member 120 and the holding member 110 move together, and the connecting member 120 and the holding member 110 prevent the rear end 6e of the leading pipe 6 remaining at the starting portion from being lifted. The

Next, after the piston rods 63; 63 of the left and right hydraulic jacks 62; 62 are extended to the maximum extent, as shown in FIG. 4 (c), the piston rods 63; After removing 85, the succeeding pipe 7 is installed behind the leading pipe 6, and the rear end opening edge of the leading pipe 6 and the front end opening edge of the succeeding pipe 7 are connected in a watertight state. That is, the succeeding tube 7 is connected to the rear end 6e of the leading tube 6 by welding or a fixture such as a bolt, and as shown in FIG. 4 (d), the other end 71f of the leading propulsive force transmission rod-shaped body 710 and By joining one end 71e of the subsequent propulsive force transmitting rod-like body 71 by bolts or welding, the subsequent propulsive force transmitting rod-like body 710 is added behind the leading propulsive force transmitting rod-like body 71, and further, An extension pressure hose (not shown) is added to the other end of the pressure hose 56, an extension water supply pipe (not shown) is added to the other end of the water supply pipe 75c, and an extension drain mud pipe (not shown) is connected to the other end of the mud pipe 76b. We will add.
Then, as shown in FIG. 4 (d), the left propulsive force transmission member 85 is installed so that the transmission body 71 faces the left side surface of the subsequent pipe 7 in parallel, and the transmission body 71 is positioned on the right side surface of the subsequent pipe 7. After the right propulsive force transmission member 85 is installed so as to face in parallel, the excavating machine 26 and the left and right hydraulic jacks 62; 62 are operated, so that the pressing plate 64; 64 at the tip of the piston rod 63; While being in contact with the force receiving plate 72b of the propulsive force transmitting member 85, the pressing plate 73b of the propulsive force transmitting member 85 is in contact with the other end 71f of the rod-like body 71x, and the leading pipe 6 further increases as the piston rod 63 extends. The rear pipe 7 moves forward while propelling to the underground 10.
Thereafter, similarly, a support work can be constructed by sequentially connecting the subsequent succeeding pipe 7 to the previous succeeding pipe 7 and installing them in the underground 10. If the rear end 6e of the succeeding pipe 7 is lifted when propelling the succeeding pipe 7 into the ground 10, the traveling means 114 of the pressing member 110 is opened in the concave grooves 93 of the left and right installation bases 92; The connecting member 120 is inserted between the upper surface of the succeeding pipe 7 placed on the guide surface 91 below the beam member 112 and the beam member 112, and the upper surface as the running surface of the concave groove 93. If the subsequent pipe 7 is propelled after the wall surface 93t and the outer peripheral surface of the wheel 116 are brought into contact with each other, the rear end 6e of the subsequent pipe 7 remaining in the starting portion is prevented from being lifted. That is, when the leading pipe 6 is installed in the underground 10, the pipe rear end movement restricting means 200 is always used. However, when the trailing pipe 7 is propelled to the underground 10, When the floating phenomenon occurs, the pipe rear end movement restricting means 200 may be used, and when the trailing end 6e of the trailing pipe 7 does not rise, the pipe rear end movement restricting means 200 need not be used.

  After the support work 11 is constructed, the excavating machine 26 is pulled back into the starting cavity 100 that is the starting point of excavation and collected. The excavating machine 26 may be pushed out into the cavity 100 on the reaching side and recovered.

  If the above-described pipe installation device 1 is used, an excavation machine having a rotary excavator 46 that rotates around the rotation center line L intersecting the propulsion direction of the front pipe 6 on the inner side of the front pipe 6 on the tip opening 6t side. 26 is pushed and the pipe 2 is pressed and the underground is excavated by the excavating machine 26 so that the pipe 2 is propelled and installed in the underground 10. Since the underground portion near the inner corner of the tube 2 having a rectangular cross section can be excavated by the two rotary excavators 46; 46, the tube 2 can be smoothly driven in the underground 10. Therefore, the support work can be easily constructed.

  According to the pipe installation device 1 of the first embodiment, since the propulsive force transmission device 70 is provided, the starting part such as the cavity 100 where the pipe installation apparatus 1 is installed is narrow, and the rear side of the pipe 2 in the starting part. Even when there is no installation space for installing the hydraulic jack 62, the hydraulic jack 62; 62 can be installed along the sides of the left and right outer surfaces 6a; 6b of the pipe 2. Even when the jacks 62; 62 cannot be installed on the rear side of the pipe 2, the pipe 2 can be propelled and advanced to the ground 10.

  Moreover, since it becomes possible to install the hydraulic jacks 62; 62 along the sides of the left and right outer surfaces 6a; 6b of the pipe 2, the hydraulic jack 62 having a long extension stroke of the piston rod 63 is used. As a result, the pipe 2 can be moved over a long distance by one maximum extension operation of the piston rod 63, and the working efficiency of the hydraulic jack 62 can be improved.

In the case where a tube having the same length as the tube of the leading tube 6 is used as the succeeding tube 7, in the state of FIG. 4C, instead of the left and right propulsive force transmitting members 85; Further, a horizontal member (not shown) is provided across the pressing plates 64; 64 of the left and right hydraulic jacks 62; 62 so as to come into contact with the other ends 71f; 71f of the left and right propulsive force transmission rods 71A; 71B. When the excavating machine 26 and the left and right hydraulic jacks 62; 62 are operated in this state, the pressing force by the left and right hydraulic jacks 62; 62 is transmitted to the leading pipe 6 through the horizontal member, and the leading pipe 6 moves forward. Therefore, an installation space for the subsequent pipe 7 is formed between the rear end 6 e of the leading pipe 6 and the reaction force receiving wall 74.
When the succeeding pipe 7 is sequentially connected to the rear end of the leading pipe 6, if the installation space for securing the hydraulic jack 62 is secured behind the succeeding pipe 7 in the starting part, the starting part The hydraulic jack 62 is installed on the rear side of the succeeding pipe 7 so that the left and right propulsive force transmitting rod-like bodies 71A; 71B, the other end 71f; 71f or the left and right propulsive force transmitting rod-like bodies 71A; 71B, the other end 71f; The trailing pipe 7 and the leading pipe 6 may be propelled by pressing a horizontal member (not shown) provided so as to extend over the hydraulic jack 62.

According to the first embodiment, the rear end movement of the pipe that restricts the rear end 6e of the pipe 2 remaining in the starting portion after the pipe 2 enters the ground from the front end from moving in the direction intersecting the center line of the pipe 2 is controlled. By providing the regulating means 200, when the pipe 2 is installed in the ground 10 from the tip, the rear end 6e of the pipe 2 remaining in the starting part is lifted, for example, the rear end 6e of the pipe 2 remaining in the starting part is lifted. 6e can be prevented from moving in the direction intersecting the center line of the pipe 2 (hereinafter referred to as pipe rear end movement phenomenon), so that it is possible to prevent the deviation of the direction of travel of the pipe 2 that has entered the underground 10, and the pipe 2 is scheduled. It will be possible to install accurately in the underground position. Further, when the rear end 6e of the pipe 2 moves in a direction intersecting the center line of the pipe 2, the water-tight performance between the water-tight performance maintaining member provided at the inner peripheral edge of the opening of the frame of the starting port and the outer peripheral surface of the pipe 2 However, in the first embodiment, the tube 2 is started separately from the starting port. However, in the first embodiment, the starting port frame is damaged. A guide stand 90 having a guide surface 91 for guiding to the departure port of the portion, and a rear end 6e of the tube 2 remaining in the departure portion after the tube 2 enters the underground 10 from the tip through the departure port. Since the pipe rear end movement restricting means 200 for restricting movement in the direction intersecting with the center line of the pipe 2 is provided, the above-described problems can be solved.
The cause of the phenomenon of the pipe rear end movement described above is that the excavating machine 26 provided inside the leading pipe 6 is heavy, or the leading end side of the pipe installed in the ground 10 of the leading pipe 6. When the length of the pipe remaining in the starting portion is longer than the length of the pipe, it is conceivable that the weight balance of the leading pipe 6 is lost. The pipe rear end movement phenomenon can occur when any of a bent pipe, a straight pipe, and a bent pipe is used as the pipe 2, but in particular, when the bent pipe is installed in the ground 10, The connecting portion between the tube and the tube constituting the bent tube becomes a corner, and only the corner of the connecting portion of the bent tube placed on the guide surface 91 formed on the curved surface becomes the curved surface of the guide surface 91. Since they are in contact with each other, the corner portion of the connecting portion of the bent tube becomes a rotation fulcrum, and the tube rear end movement phenomenon tends to become remarkable. According to the first embodiment, the pipe rear end movement phenomenon can be reliably suppressed.
The pipe rear end movement restricting means 200 can move with the pipe 2 while pressing the pipe 2 so as to press the pipe 2 installed on the guide surface 91 against the guide surface 91 and can move with respect to the guide table 90. Since the pressing member 110 is provided as described above, the pipe 2 can be pushed to the ground 10 while pressing the pipe 2 against the guide surface 91 and suppressing the above-described pipe rear end movement phenomenon.
Further, the pressing member 110 includes a pair of support pillars 111; 111 disposed on both sides of the pipe 2 at an interval wider than the horizontal width of the pipe 2 installed on the guide surface 91, and a pair of support pillars 111; 111. The upper end portions (one end portions) of the pipes 2 are connected to each other and formed on a gate body 113 including an upper surface 6u (outer surface) of the pipe 2 disposed on the guide surface 91 and a beam member 112 facing the upper surface 6u. Since the connecting member 120 for bringing the beam member 112 and the upper surface 6u of the tube 2 into close contact with each other is provided, the tube member 2 is pressed against the guide surface 91 by the beam member 112 and the connecting member 120 of the portal body 113, and the tube after The pipe 2 can be propelled to the ground 10 while suppressing the end movement phenomenon.
The left and right installation bases 92; 92 of the guide base 90 are provided with a concave groove 93 that forms a traveling surface, and the pressing member 110 includes a traveling means 114 that travels on the traveling surface and is engaged in the concave groove 93. The holding member 110 can be moved smoothly, and the propulsion work can be performed efficiently.

Embodiment 2
The pipe rear end movement restricting means may be configured such that the lower end portion of the column 111 of the pressing member 110 is detachably attached to the propulsive force transmission member 85. In this case, since the holding member 110 moves together with the pipe 2 by pushing the pipe 2 while holding the upper surface of the rear end portion of the pipe 2 with the holding member 110, the movement of the rear end of the pipe is performed as in the first embodiment. The phenomenon can be prevented. That is, the pipe rear end movement restricting means 200 according to the second embodiment can move with the pipe 2 while pressing the pipe 2 so as to press the pipe 2 installed on the guide base 90 against the guide surface 91, and the guide base 90 can be moved. The holding member 110 is detachably attached to the propulsive force transmission member 85 so as to be movable. In the case of Embodiment 2, it can be set as the structure which does not provide the travel means 114 and a travel surface.

Embodiment 3
As the pipe rear end movement restricting means, a structure that is formed in a tunnel cylinder surrounding the outer peripheral surface of the pipe 2 placed on the guide surface 91 and is fixed in front of the starting port may be used.

Embodiment 4
As the tube rear end movement restricting means, a weight (not shown) placed on the upper surface 6u of the tube 2 placed on the guide surface 91 may be used.

Embodiment 5
As shown in FIG. 7; FIG. 8, on the inner side surfaces 92a; 92a facing each other of the left and right installation bases 92; 92, in the extending direction of the installation base 92 with a concave cross section opening to the inner side surface 92a Concave grooves 94; 94 are provided as extending recesses, and convex portions 96 inserted into and engaged with the left and right concave grooves 94; 94 are provided on the left and right outer surfaces 6a; 6b of the tube 2. The convex portion 96 is provided so as to be engaged with the concave groove 94 so as not to be detached from the concave groove 94 in a direction perpendicular to the extending direction of the concave groove 94. That is, convex portions 96 provided on the left and right outer surfaces 6a; 6b of the pipe 2 placed on the guide surface 91, and the left and right installation bases 92; 92 facing the left and right outer surfaces 6a; 6b. Concavo-convex engagement with a concave groove 94 as a concave portion provided in the inner side surface 92a; 92a, or a concave portion provided in the left and right outer side surfaces 6a; 6b of the tube 2 placed on the guide surface 91 The pipe 2 moves from the tip to the ground 10 by the concave-convex engagement with the left and right installation bases 92; opposite to the left and right outer surfaces 6a; 6b, and the convex portions provided on the left and right inner surfaces 92a; 92a. A pipe rear end movement restricting means for restricting movement of the rear end of the pipe 2 remaining in the starting portion after entering in a direction intersecting the central axis of the pipe 2 is configured. Note that the front end surface of the installation base 92 corresponding to the front end of each concave groove 94; 94 of the guide base 90 is formed in the opening 94a, and the tube 2 is propelled so that the convex portion 96 passes through the opening 94a. Prior to entering 10, the projection 96 is removed.
In the case of the fifth embodiment, as shown in FIGS. 7 to 9, a convex portion 96 attached to the left and right outer surfaces 6 a; 6 b of the pipe 2 by welding, bolts, nuts, or the like is formed as a concave groove 94 from above the guide surface 91. An insertion hole 97 is formed by notching the upper wall of the concave groove 94 so that it can be inserted therein.
In the case where the insertion hole 97 is not provided, after the tube 2 is placed on the guide surface 91, the protrusions that form the convex portions 96 that have entered the recessed groove 94 are formed on the left and right outer surfaces 6a of the tube 2; You may attach to 6b with welding, a volt | bolt, and a nut.

  According to the fifth embodiment, the pipe rear end movement restricting means is placed on both sides of the guide surface 91 and the pipe 2 installed on the guide surface 91 when the pipe 2 is brought into the ground in contact with the outer surface of the pipe 2. Left and right installation bases 92; 92 as inner walls 92a; 92a; 92a; guide base 90 provided with 92a; left and right outer surfaces 6a; 6b of pipe 2 as outer surface of pipe 2 installed on guide surface 91 And a concave / convex engaging body comprising concave and convex portions that are provided on the inner side surfaces 92a; 92a (walls) of the left and right installation bases 92; 92 facing the right and left outer surfaces 6a; 6b. Therefore, the pipe rear end movement phenomenon can be prevented by the concave-convex engagement body.

One or more pipe rear end movement restricting means described in the first to fifth embodiments may be used in combination.
Moreover, although the example which mounts the pipe | tube 2 on the guide surface 91 which is a concave curved surface and installs the said pipe | tube 2 in the ground was shown above, the guide surface which is the curved curved surface of the guide stand 90 is shown. You may make it mount the pipe | tube 2 on the top and install the said pipe | tube 2 in the ground.
Moreover, you may use the pressing member of the structure which is not provided with the connection material 120 as a pressing member of Embodiment 1; 2. For example, the beam material 112 of the portal body 113 and the upper surface 6u of the pipe 2 may be used in contact with each other, or the beam material 112 of the portal body 113 and the upper surface 6u of the pipe 2 may be detachably connected. .
Moreover, it is good also as a structure which the lower wall surface as a running surface of the ditch | groove 93, and the outer peripheral surface of the wheel 116 are made to contact. Further, the running means 114 of the portal body 113 is engaged in the recessed groove 94; 94 formed on the inner side surfaces 92a; You may comprise so that the wheel 116 of the driving | running | working means 114 can drive | work the driving | running | working surface formed in the inside.
It is good also as a structure which does not provide the travel means 114 and a travel surface.
In Embodiments 1; 2; 4, a guide base having a guide surface without the left and right installation bases 92; 92 may be used.

Embodiment 6
As shown in FIG. 10, the rotation center line L of the rotary excavation body 46 is parallel to a pair of outer surfaces of the top pipe 6 facing each other in parallel and is not orthogonal to a plane perpendicular to the propulsion direction of the top pipe 6. By providing the excavating machine rocking drive device 250 that is set to intersect with each other, the cross-sectional area wider than the cross-sectional area of the leading pipe 6 is provided in front of the leading pipe 6 before the leading pipe 6 advances. You may use the pipe installation apparatus 1X which can excavate and can excavate in front of the front pipe 6. FIG. For example, as shown in FIGS. 10 (a) and 10 (b), the rotary excavator 46 has a configuration that can swing left and right in the excavation progress direction.
Hereinafter, an example of the tube installation device 1X will be described, but the same components as those described in the tube installation device 1 of Embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
The pipe installation device 1X according to the sixth embodiment includes the excavating machine swing drive device 250 instead of the substrate 25 and the pipe-side propulsion receiving portion 21 that are the configuration of the excavation device 3 of the pipe installation device 1 described in the first embodiment. It is a configuration.
The excavating machine swing drive device 250 includes a swing substrate 300, a guide member 310 of the swing substrate 300, and a swing substrate driving means 320.
In the tube installation device 1X, the guide member 310 is installed on the inner side of the front end opening 6t side of the front tube 6 so that the center line of the tube of the cylindrical guide member 310 matches the center line of the tube of the front tube 6. The watertightness between the outer peripheral surface 330 of the cylinder of the guide member 310 and the inner peripheral surface 6s of the leading pipe 6 is maintained by a watertight performance maintaining member 340 such as rubber packing, and the swinging substrate 300 is mutually connected to the leading pipe 6. The left and right side walls 301; 302 with the center between a pair of parallel outer surfaces facing each other as the center of rotation are attached to the guide member 310 so that the side wall can swing back and forth, and the outer peripheral surface 390 of the swing substrate 300 and the guide member 310 The water tightness between the inner peripheral surface 350 of the cylinder is maintained by a water tightness performance maintaining member 125 such as rubber packing. A propulsive force receiving portion 630 is provided in front of the guide member 310 on the inner side of the leading tube 6 on the tip opening 6t side, and the propelling force receiving portion 630 is installed inside the leading tube 6 on the tip opening 6t side. It is possible to restrict the forward movement of the guide member 310 by contacting the front end surface 311 of the cylinder of the member 310 and to transmit the propulsive force transmitted to the guide member 310 via the propulsive force transmission device 70 to the leading pipe 6. In order to be able to do so, it is fixed to the inner peripheral surface 6s on the tip opening 6t side of the leading pipe 6 by fixing means such as welding, bolts and nuts. Further, the swing substrate 300 is formed with a support holding through hole 130, a mud pipe holding through hole 140, and a water supply tube holding through hole 150 that pass through the flat plate of the swing substrate 300 forward and backward. In the excavating machine 26, the support 42 of the excavating machine 26 is held in a fixed state in a state of being penetrated, and the drainage pipe holding through hole 140 is held in a fixed state in which the tip of the drainage pipe 76c is penetrated. The water supply pipe holding through hole 150 is held in a fixed state with the tip of the water supply pipe 75c penetrating therethrough. Further, the rotary excavating body 46 of the excavating machine 26 having a plurality of excavating bits (excavating blades) 52 is positioned in front of the tip opening 6t of the top pipe 6 and the column 42 that supports the rotary excavating body 46 is a swinging substrate. 300 is supported.
According to the pipe installation device 1X of the sixth embodiment, when excavating the underground 10 in front of the top pipe 6 with the rotary excavator 46, the swing board driving means 320 such as a hydraulic jack is a pair of the swing board 300. By pressing and pulling back the rear surface of the side wall 301; 302 side of the wall, the rotational center line L of the rotary excavator 46 is opposed to the surface perpendicular to the propulsion direction of the leading pipe 6 and the leading pipe 6 in parallel with each other. A first state parallel to a pair of outer surfaces (for example, upper and lower outer surfaces of the leading tube 6), and a pair of outer surfaces of the leading tube 6 facing each other in parallel (for example, upper and lower outer surfaces of the leading tube 6). And a second state (see FIGS. 10A and 10B) that intersects the surface perpendicular to the propulsion direction of the leading pipe 6 in a state other than perpendicular.
That is, the pipe installation device 1X includes the excavating machine rocking drive device 250 for rocking the rotary excavating body 46 in the left-right direction of the top pipe 6 in front of the top pipe 6, so When the rotary excavator 46 is excavated by the rotary excavator 46, the rotary excavator 46 can be swung in the left-right direction by driving the swing substrate 300 by the swing substrate driving means 320, for example. Compared with the case where it does not swing, the left-right width that can be excavated can be increased. In other words, if the pipe installation device 1X is used, the underground 10 can be excavated at a width interval that is wider than, for example, the left-right width interval of the front tube 6 in front of the front tube 6 before the front tube 6 advances. Since it is possible to excavate the front pipe 6 in the left-right width direction in front of 6, the hard ground layer in front of the top pipe 6 can be excavated, and even when the underground 10 is a hard ground layer, the pipe 2 can be underground. 10 can be smoothly promoted.

  When the pipe is installed in the ground 10 using the pipe installation device 1X including the excavating machine swing drive device 250 of Embodiment 6, the width is wider than the cross-sectional area of the front pipe 6 in front of the front pipe 6. Cross section can be excavated. That is, since the underground pipe 10 in front of the leading pipe 6 can be dug in the underground pipe 10 on the left and right sides of the leading pipe 6, the pipe 2 can be smoothly driven in the underground 10.

Embodiment 7
As shown in FIGS. 11 and 12, the rotary excavation body includes a first excavation bit 8e and a second excavation bit 8f as excavation blades provided so as to protrude from the outer peripheral surface 51 of the housing 50. A rotary excavator 46A having the above-described configuration may be used.
A plurality of second excavation bits 8 f are arranged in a direction along the rotation center line L of the housing 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 housing 50 so as to be scattered. The first excavation bits 8e are detachably attached individually to individual bit attachment portions 83 provided on the outer peripheral surface 51 of the housing 50. The second excavation bit 8 f is provided on a bit installation plate 84 that is detachably attached to a plurality of bit attachment portions 83 provided on the outer peripheral surface of the housing 50. In other words, the second excavation bit group 810 is attached to the bit attachment portion 83 and extends along the rotation center line L of the housing 50 along the circumferential width of the outer peripheral surface 51 of the housing 50 (direction along the rotation center line L). A plurality of second excavation bits 8f on the bit installation surface 84a of the bit installation plate 84 extending across the width of the casing 50, that is, both end surfaces in the direction along the rotation center line L of the casing 50). It is a configuration that is detachably or fixedly provided so as to be aligned in a direction along L.
In each rotating excavation body 46A, the first excavation bits 8e are provided at positions 180 degrees apart from each other in the circumferential direction of the outer peripheral surface 51 of the housing 50. The second excavation bit group 810 is provided on the outer peripheral surface 51 of the housing 50 at a portion where the first excavation bit 8e is not provided.
As shown in FIG. 11B, the tips of the respective excavation bits 8f of the 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 casing 50 are In addition, it is set so as not to be positioned on the same surface 85e orthogonal to the rotation center line L of the casing 50. That is, the ground portion that is not excavated between adjacent excavation bits 8f in one second excavation bit group 810 can be excavated by each excavation bit 8f of the other second excavation bit group 810. In short, each of the rotary excavating bodies 46A has a complementary pair of 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. 12A, a first distance 80x (that is, the first distance) from the rotation center line L of the housing 50 to the tip of the first excavation bit 8e via a line orthogonal to the rotation center line L. A second radius 81x (that is, a second radius) from the rotation center line L of the casing 50 to the tip of the second drill bit 8f 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 8e with the first distance 80x as the excavation radius is between the upper and lower inner wall surfaces 6c and 6d of the head pipe 6 (between the inner wall surfaces of one pair of wall surfaces of the head pipe 6). The excavation diameter by the second excavation bit 8f, which is set to be smaller than the dimension 9x and the second distance 81x is 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 in front of the top tube 6 and inside the top tube 6 through the tip opening 6t of the top tube 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.
Further, 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 tip opening 6t of the head pipe 6. When set, the rotation radius is set to be rotatable.
That is, the rotary excavation body 46A is rotationally driven in a state where the rotary excavation body 46A is positioned in front of the front end opening 6t of the top pipe 6, whereby the first excavation bit 8e and the second excavation bit 8f are 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 in the vertical width than that of the front end opening 6t can be excavated in front of the front end opening 6t of the front pipe 6, so that the front end of the front pipe 6 The ground can be excavated before the opening edge 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 8f of the second excavation bit group 810 is the same as the upper and lower inner wall surfaces 6c; After the state where it is not located above the position indicating the plane, the rotary excavator 46A is pulled back into the pipe 2 and the excavating machine 26 is recovered in the cavity 100 on the starting side.

  That is, according to the seventh embodiment, the first distance 80x (that is, the first excavation) from the rotation center line L of the housing 50 to the tip of the first excavation bit 8e via a line orthogonal to the rotation center line L. The second radius 81x from the rotation center line L of the casing 50 to the tip of the second drill bit 8f via the line orthogonal to the rotation center line L (ie, according to the second drill bit). The excavation diameter by the first excavation bit 8e is set to be different from the excavation radius), and the first distance 80x is the excavation radius, and the inner wall surfaces 6c above and below the guide blade tube 9 (see FIG. 2) of the leading pipe 6 The diameter of excavation by the second excavation bit 8f with the second distance 81x as the excavation radius is set larger than the upper and lower inner wall surfaces 6c of the top pipe 6; The rotary excavator 46A was provided. For this reason, the rotary excavator 46A positioned in front of the front end opening 6t of the top pipe 6 is rotated and the excavation bit 8e; 8f excavates the ground, so that the front pipe 6 is positioned in front of the front end opening 6t of the top pipe 6. The width of the square section of the front end 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, the ground located in front of the front end opening 6t of the front pipe 6 can be reliably excavated by the excavation bits 8e; 8f before the front end opening edge of the front pipe 6 collides with the ground. It is possible to prevent a situation in which the edge 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 is a hard ground.

The tip positions of the respective excavation bits 8 f of the 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 enclosure 50 are the rotation centers of the enclosure 50. It is set so as not to be positioned on the same surface 85e orthogonal to the line L. That is, a 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 casing 50 is rotated by the second excavation 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 tip opening 6t of the leading pipe 6 is formed. A hole can be excavated efficiently and the pipe 2 can be propelled more smoothly.
Further, by arranging the second excavation bit groups 810, for example, at equal intervals on the outer peripheral surface 51 of the housing 50 around the rotation center line L, the rotational center of gravity of the rotary excavator 46A can be kept constant. Thus, the rotation of the rotary excavator 46A becomes smooth and can be excavated efficiently, and the pipe 2 can be propelled more smoothly.
In addition, since the second excavation bit 8f and the first excavation bit 8e are provided, a hole having an excavation diameter with the second distance 81x as the excavation radius is made more efficient by the second excavation bit 8f and the first excavation bit 8e. Can be excavated.

Note that the second excavation bit group 810 may be configured by an aggregate of second excavation bits 8 f individually attached to individual attachment portions 83 provided on the outer peripheral surface 51 of the housing 50.
In addition, on the outer peripheral surface 51 of the housing 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 housing 50. The excavation bits 8f are arranged so as to be lined up individually, or along the rotation center line L across both end faces in the direction along the rotation center line L of the casing 50 on the outer peripheral surface 51 of the casing 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 and is rotatable at a position in front of the tip opening 6t of the top tube 6.
Further, the second excavation bit group 810; 810 may not be provided at positions 180 degrees apart from each other in the circumferential direction on the outer peripheral surface 51 of the housing 50.
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 8e via a line orthogonal to the rotation center line L, and the rotary excavator 46A is located inside the pipe 6. The second radius 81x from the rotation center line L to the tip of the second excavation bit 8f passing through the line orthogonal to the rotation center line L is set to a rotation radius that can rotate around the rotation center line L. 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 tip opening 6t of the top pipe 6, it rotates around the rotation center line L. What is necessary is just to set to the possible rotation radius.

Further, the rotary excavator may be configured not to include the first excavation bit 8e. That is, you may use the rotary excavation body which has only the 2nd excavation bit 8f as an excavation bit.
In short, in the case where the rotary excavator does not include the first excavation bit 8e, the shortest distance from the rotation center line L to the outer peripheral surface 51 of the casing 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 8f (excavation bit) is such that the rotary excavator cannot rotate around the rotation center line L inside the pipe 2 and the rotary excavator is located at the top pipe 6 What is necessary is just to set to the rotation radius which can be rotated centering | focusing on the rotation center line L, when located in front of the front-end | tip opening 6t.
That is, the diameter of the casing 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 top pipe 6, and the second distance 81x is the second digging radius. Since the excavation diameter by the excavation bit 8f is set to be larger than the dimension 9x between the upper and lower inner wall surfaces 6c; 6d of the front pipe 6, the rotary excavator 46A opens the tip 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, a direction perpendicular to, for example, the upper and lower inner wall surfaces 6c; 6d (one pair of wall surfaces of the leading pipe 6) of the leading pipe 6 in front of the leading pipe 6 by excavation by the second drilling bit 8f. Since the underground 10 can be excavated at a wider vertical width interval than the vertical interval of the leading pipe 6 and the front pipe 6 can be excavated in the vertical width direction of the leading pipe 6 in front of the leading pipe 6, Even when the mountain is hard ground, the pipe 2 can be propelled more smoothly.

  In the case where the pipe 2 is installed in the ground 10 using the pipe installation device provided with the rotary excavation body 46A of the seventh embodiment, a cross-sectional area wider than the cross-sectional area of the top pipe 6 is provided in front of the top pipe 6. Can drill. That is, since the underground pipe 10 in front of the leading pipe 6 can be dug in the underground pipe 10 on the upper and lower sides of the leading pipe 6, for example, the above-mentioned pipe rear end movement phenomenon is likely to occur. Therefore, when the pipe 2 is installed in the ground 10 using the pipe installation device of the seventh embodiment, it is effective to suppress the pipe rear end movement phenomenon described above using the pipe rear end movement restricting means described above. It is.

Embodiment 8
If the pipe installation device provided with the rotary excavator 46A of the seventh embodiment and the excavating machine swing drive device 250 of the sixth embodiment is used, the ground on the top, bottom, left and right sides of the top pipe 6 in the ground 10 in front of the top pipe 6 is used. Since the middle 10 additional moats are possible, the above-mentioned pipe rear end movement phenomenon is more likely to occur. Therefore, when the pipe 2 is installed in the ground 10 using the pipe installation device of the eighth embodiment, it is effective to suppress the pipe rear end movement phenomenon described above using the pipe rear end movement restricting means described above. It is.

  As a method for transmitting the propulsive force of the propulsion device such as the hydraulic jack 62 to the pipe 2, a non-illustrated propulsive force transmitting member protruding rearward from the rear end opening of the tube 2 may be provided. You may make it press the rear-end surface of the pipe | tube 2 directly.

Further, as the excavating machine 26, a water jet device (high pressure water injection device), a rotary excavator having the center axis of the pipe 2 as a rotation center, or the like may be used.
For example, if the pipe 2 has a rectangular cross section, the excavating machine 26 is preferably used. However, if a pipe having a square cross section is used, a water jet device (high pressure water injection device) is used as the excavating machine. It may be used, a rotary excavator having the center axis of the tube 2 as the center of rotation, or a combination thereof. For example, a rotary excavator having the center axis of the pipe as the center of rotation is installed at the center of the front opening of the top pipe 6, and an injection nozzle of a water jet device is installed at the corner of the front opening of the top pipe 6. In addition, the cross-sectional shape referred to in the present invention is a quadrangular shape including a shape in which square corners are chamfered.

  Further, the tube 2 may be a tube having a circular cross section. A propulsion device other than the hydraulic jack 62 may be used as the propulsion device.

1 pipe installation device, 2 pipes, 6a; 6b pipe outer surface (outer surface), 6 leading pipe (tube),
6t tip opening, 6e rear end of pipe, 7 follower pipe (pipe), 10 underground, 26 excavating machine,
90 guide table, 91 guide surface, 92a inner surface (wall) of installation table,
94 concave groove (concave engaging body), 96 convex part (concave engaging body), 100 cavity part (starting part),
110 holding member, 200 pipe rear end movement restricting means.

Claims (2)

In the pipe installation device for installing the excavating machine on the tip opening side of the pipe, pushing the pipe from the starting part and excavating the underground with the excavating machine to propel the pipe and install it in the ground,
A guide stand having a guide surface for guiding the tube to the departure port of the departure portion, and a left and right installation stand provided so as to rise from the left and right sides of the guide surface, and the tube from the tip through the departure port The pipe rear end movement restricting means for restricting the rear end of the pipe remaining in the starting portion after entering the ground and moving in the direction intersecting the center line of the pipe, and fixed to the left and right installation bases, respectively. A propulsion device that applies propulsive force to the pipe installed on the guide surface ;
The pipe rear end movement restricting means is formed on both the left and right sides of the guide base and extends in the front-rear direction, which is the propulsion direction of the pipe placed on the guide base, and engages with the concave groove together with the pipe. And moving means provided to be movable in the propulsion direction.
The concave grooves are formed by left and right concave grooves formed in a cross-sectional concave shape opening on the left and right outer surfaces of the left and right installation bases,
A gate provided with a pair of left and right support columns and a beam member connecting the upper ends of the pair of left and right support columns, the moving means being arranged to face each other in parallel with a distance wider than the left and right width interval of the guide stand. It is composed of a pressing member provided with a shape, left and right traveling means respectively provided at the lower ends of a pair of left and right columns, and a connecting material,
When the right and left traveling means are inserted into the left and right concave grooves and a connecting material is inserted between the upper surface of the pipe placed on the guide surface under the beam and the beam, and the pipe advances A pipe installation device characterized in that the portal body provided with traveling means and the connecting member are moved together . In the pipe installation device for installing the excavating machine on the tip opening side of the pipe, pushing the pipe from the starting part and excavating the underground with the excavating machine to propel the pipe and install it in the ground,
A guide stand having a guide surface for guiding the tube to the departure port of the departure portion, and a left and right installation stand provided so as to rise from the left and right sides of the guide surface, and the tube from the tip through the departure port The pipe rear end movement restricting means for restricting the rear end of the pipe remaining in the starting portion after entering the ground and moving in the direction intersecting the center line of the pipe, and fixed to the left and right installation bases, respectively. A propulsion device that applies propulsive force to the pipe installed on the guide surface;
The pipe rear end movement restricting means is formed on both the left and right sides of the guide base and extends in the front-rear direction, which is the propulsion direction of the pipe placed on the guide base, and engages with the concave groove together with the pipe. And moving means provided to be movable in the propulsion direction.
The concave grooves are formed by left and right concave grooves formed in a cross-sectional concave shape that opens on the left and right inner surfaces facing each other of the left and right installation bases,
Moving means, you characterized in that it is constituted by the right and left convex portions movable are inserted into the left and right of the groove is connected to the extending direction of the groove by engaging with the left and right sides of the tube the tube Installation equipment .

Images