JP2014025232A - Propulsive force transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a propulsive force transmission device in which a pipe can be moved into the ground even in the case where a propulsion apparatus cannot be installed at a rear side of the pipe.SOLUTION: In a propulsive force transmission device 70, an excavator 26 is installed closer to an opening 6t in a distal end of a pipe 2, the pipe 2 is pressed from a departure part (cavity part 100) and a ground 10 is excavated by the excavator 26, such that a pressing force from a propulsion apparatus (hydraulic jack 62) is transmitted to the pipe 2 when propelling and installing the pipe 2 under the ground 10. The pressing force from the propulsion apparatus is received at side positions of outer side faces 6a, 6b of the pipe 2 installed in the departure part, and the pressing force is transmitted to the pipe 2.

Description

  The present invention relates to a propulsion force transmission device for transmitting a pressing force from a propulsion device to a tube when the tube is propelled and installed 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

When a pipe is installed in the ground using the pipe installation device, the pipe is pushed into the ground from a hollow portion formed in the ground or a starting portion such as the ground. In this case, generally, the pipe is pushed by pushing the pipe from the rear side of the pipe using a propulsion device such as a hydraulic jack.
However, if the starting part where the pipe installation device is installed is narrow and there is no installation space for installing a hydraulic jack behind the pipe, the problem is that the pipe cannot be advanced into the ground. was there.
An object of the present invention is to provide a propulsive force transmission device capable of moving a pipe into the ground even when the propulsion apparatus cannot be installed behind the pipe.

The propulsive force transmission device according to the present invention has a drilling machine installed on the tip opening side of the pipe, pushes the pipe from the starting portion, and excavates the ground with the drilling machine, thereby propelling the pipe and installing it in the ground A propulsive force transmission device that transmits the pressing force from the propulsion device to the pipe, and receives the pressing force from the propulsion device at the lateral position of the outer surface of the pipe installed at the starting portion and applies the pressing force. Since it is transmitted to the pipe, it becomes possible to install the propulsion device along the side of the outer surface of the pipe, and even if the propulsion device cannot be installed on the back side of the pipe, the pipe is advanced into the ground. Can do.
In addition, the tube having a quadrangular cross section installed at the starting portion is disposed outside the outer surface of one of the pair of outer surfaces facing each other in parallel with the outer surface. A transmission body, a force receiving portion that is provided so as to extend away from one outer surface of the pipe on one end side of the transmission body, and that receives a pressing force from the propulsion device, via the force receiving portion and the transmission body One of the propulsive force transmitting members provided with a pressing portion that transmits the transmitted force to the tube, and the other of the pair of outer surfaces facing each other in parallel with each other in a square-shaped tube installed at the starting portion A transmission body arranged on the outside of the outer surface of the tube so as to face the other outer surface in parallel, and propelled so as to extend in a direction away from the other outer surface of the pipe on one end side of the transmission body A force receiving portion that receives a pressing force from the device, a force receiving portion, and And the other propulsive force transmitting member having a pressing portion for transmitting the force transmitted through the main body to the pipe, so that the propulsion device is installed along the side of the pair of outer side surfaces of the pipe Even if the propulsion device cannot be installed behind the pipe, the pipe can be advanced into 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). Sectional drawing which shows the pipe installation apparatus provided with the excavation machine rocking | fluctuation drive device (Embodiment 2). (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 3). (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 3).

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, and a guide stand 90. 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. The width of the tube is 463 mm on the upper bottom side, and 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 center line 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 line 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 orthogonal to the center line of the top tube 6. Configured to be located.
Thus, 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 orthogonal to the center line 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 center line (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 transmission rod-shaped body 710 includes a rod-shaped body 71x having a length from the 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 surface 102e 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 guide table 90 includes a guide surface 91 on which the pipe 2 is placed, and left and right installation tables 92; 92 provided on the left and right sides of the guide surface 91. The installation table 92 is configured by a table provided so as to rise from the side of the guide surface 91.
The lateral movement of the tube 2 placed between the side surfaces 92a; 92a on the guide surface 91 is restricted by the side surfaces 92a; 92a facing each other forming the left and right installation bases 92;
The left hydraulic jack 62 is fixed to the rear side of the upper surface of the left installation table 92 by a fixture 67 or the like, and the right hydraulic jack 62 is fixed to the rear side of the upper surface of the right installation table 92. It is fixed by 67 etc.
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.

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.

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. 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.
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 surface 102e of the leading tube 6 by welding or a fixing tool such as a bolt, and as shown in FIG. By connecting the one end 71e of the propulsive force transmitting rod-like body 710 with a bolt or welding, the subsequent propelling force transmitting rod-like body 710 is added behind the leading propelling force transmitting rod-like body 71, and further the pressure resistance An extension pressure hose (not shown) is added to the other end of the hose 56, an extension water supply pipe (not shown) is added to the other end of the water supply pipe 75c, and an extension mud pipe (not shown) is added to the other end of the mud pipe 76b. To go.
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 of the subsequent propulsive force transmitting rod-like body 71. As the pipe length increases, the leading pipe 6 is further propelled into the ground 10 and the trailing pipe 7 moves forward.
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.

  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.

  In addition, since the hydraulic jack 62; 62 can be installed in a state along the sides of the left and right outer surfaces 6a; 6b of the pipe 2, the hydraulic jack 62 has a long extension stroke of the piston rod 63. Can be used, and the pipe 2 can be moved over a long distance by one maximum extension operation of the piston rod 63, so that the working efficiency of the hydraulic jack 62 can be improved.

Further, 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, for example, in the state of FIG. 4C, the right and left propulsive force transmitting members 85; Instead, 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; 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 succeeding tube 7 is formed between the rear end surface 102e of the leading tube 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 In FIG. 2, a hydraulic jack 62 is installed on the rear side of the succeeding pipe 7, and a horizontal member (not shown) provided so as to straddle the other ends 71f; 71f of the left and right propulsive force transmitting rod-like bodies 71A; The trailing tube 7 and the leading tube 6 may be propelled by pressing.

Embodiment 2
As shown in FIG. 7, the rotation center line L of the rotary excavator 46 is parallel to a pair of outer surfaces of the leading pipe 6 facing each other in parallel and is not perpendicular to a plane perpendicular to the propulsion direction of the leading 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. 7 (a) and 7 (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 second embodiment includes the excavating machine swing driving device 250 in place 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 It is set as the structure by which the watertightness between the inner peripheral surfaces 350 of this pipe | tube was maintained by the watertight performance maintenance members 120, 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 second 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. 7A and 7B) that intersects with the surface perpendicular to the propulsion direction of the leading pipe 6 in a state other than orthogonal.
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.

Embodiment 3
As shown in FIGS. 8 and 9, the rotary excavator includes a first excavation bit 8 e and a second excavation bit 8 f 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. 8 (b), 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 housing 50 are as follows. 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. 9A, a first distance 80x 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 (ie, the first distance 80x). 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.
Further, 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; 6d of the top pipe 6, as shown in FIG. 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 third embodiment, the first distance 80x (that is, the first excavation) from the rotation center line L of the casing 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 third 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 excavate. That is, in the underground 10 in front of the leading pipe 6, for example, an underground excavation of the underground pipe 10 on the upper and lower sides of the leading pipe 6 is possible, and the pipe 2 can be promoted more smoothly.

Embodiment 4
If the pipe installation device provided with the rotary excavator 46A of the third embodiment and the excavating machine swing drive device 250 of the second 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 10 middle moats are possible, the pipe 2 can be propelled more smoothly.

As the excavating machine 26, a water jet device (high pressure water injection device), a rotary excavator having the center line 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 line of the pipe 2 as the center of rotation, or a combination thereof. For example, a rotary excavator having the center line 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.

  In the above description, the propulsive force transmitting device 70 provided with the left and right propulsive force transmitting members 85; 85 has been described as the propulsive force transmitting device 70. However, the left and right propelling devices 72; A propulsive force transmission device configured to include a propulsion force transmission member that connects the other ends of the transmission bodies 71; 71 to each other and functions as a pressing portion 73 that presses the other end 71 b of the propulsion force transmission rod-shaped body 710. Also good.

  The propulsive force transmission device 70 does not include the propulsive force transmission rod-like body 710, and receives the pressing force from the propulsion device 4 at the lateral position of the outer surface 6a; 6b of the pipe 2 installed at the starting portion. It may be configured by a propulsive force transmission member that directly transmits the pressure to the rear end surface 102e of the tube 2. For example, a tube having a quadrangular cross section installed at the starting portion is disposed outside one outer surface of one pair of outer surfaces facing each other in parallel to face the one outer surface in parallel. A transmission body, a force receiving portion provided to extend away from one outer surface of the pipe on one end side of the transmission body, and receiving a pressing force from the propulsion device; One propulsive force transmission member provided in contact with the rear end surface and provided with a pressing portion that transmits the force transmitted through the force receiving portion and the transmission body to the rear end surface of the pipe, and installed at the starting portion A transmission body arranged on the outside of the other outer surface of the pair of outer surfaces facing each other in parallel with each other in the shape of a square tube having a rectangular cross section, and facing the other outer surface; Extends away from the other outer surface of the tube at one end of the body And a force receiving portion that receives a pressing force from the propulsion device, and is provided so as to contact the rear end surface of the pipe on the other end side of the transmission body, and is transmitted through the force receiving portion and the transmission body. It is good also as a structure provided with the other propulsion-force transmission member provided with the press part which transmits the force to the rear end surface of the pipe | tube. In this case, a frame-like propulsive force transmitting body is fixed to the inner peripheral surface 20a of the pipe of the leading pipe 6, and the watertight performance maintaining member 35 is disposed in front of the propelling force transmitting body on the inner peripheral surface 20a of the pipe of the leading pipe 6. By disposing the substrate 25 via the pushing force, the pressing force of the propulsion device 4 is transmitted to the rear end surface 102e of the tube 2 via the propulsive force transmission member 85 to propel the tube 2 and the propulsion transmitted to the tube 2 Since the force is transmitted to the substrate 25 through the propulsive force transmission body and the watertight performance maintaining member 35, the excavating machine 26 is also propelled.

2 pipes, 6 leading pipes (tubes), 6a; 6b one pair of outer surfaces, 6t tip opening, 7 subsequent pipes (tubes), 10 underground, 26 excavating machine,
70 propulsive force transmission device, 71 transmission body, 72 force receiving portion, 73 pressing portion,
85 Propulsive force transmission member, 100 cavity (starting part).

Claims (2)

When a drilling machine is installed on the end opening side of the pipe and the pipe is pushed from the starting part and the ground is excavated by the excavating machine, the thrust from the propulsion device is pushed when the pipe is propelled and installed in the ground. A propulsive force transmission device for transmitting
A propulsive force transmission device that receives a pressing force from a propulsion device at a lateral position of an outer surface of a tube installed in a starting portion and transmits the pressing force to the tube. A transmitter disposed on the outer side of one of the pair of outer faces of the pipe having a quadrangular cross section installed in the starting portion so as to face the outer face in parallel. A force receiving portion provided on one end side of the transmission body so as to extend away from one outer surface of the pipe and receiving a pressing force from the propulsion device, and transmitted through the force receiving portion and the transmission body. One propulsive force transmission member provided with a pressing portion that transmits the applied force to the pipe;
A transmission body arranged on the outside of the other outer surface of one pair of outer surfaces facing each other in parallel with each other in a quadrangular cross-section tube installed in the starting portion so as to face the other outer surface in parallel. A force receiving portion that is provided so as to extend away from the other outer surface of the pipe at one end side of the transmission body, receives a pressing force from the propulsion device, and is transmitted via the force receiving portion and the transmission body. The other propulsive force transmission member provided with a pressing portion that transmits the generated force to the pipe,
The propulsive force transmission device according to claim 1, further comprising:

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