JP2008014044A - Recovery device of excavator body in tunnel excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely and efficiently recover an excavator body by carrying out backward in a stable carrying attitude, after excavating a tunnel of the predetermined length by a tunnel excavator, while forming a pipe duct. <P>SOLUTION: This tunnel excavator has an outer shell body 1 and the excavator body 3 extractably supporting its inner shell body 6 by a ring-shaped first partition wall 2 integrally arranged on a front end inner peripheral surface of this outer shell body 1, and is constituted so that when recovering the excavator body 3, after removing a cutter plate 4 rotatably journaled to the excavator body 3 from the excavator body 3, the excavator body 3 is pulled in the outer shell body 1, and is put in an attitude of a state of laying down on one's face by rotating by 90 degrees in the longitudinal direction in a state of hanging in the air by a lift means 22 composed of a chain block, and is mounted on a carrying carriage 23 traveling on a rail 20 laid in the pipe duct in this state, and is recovered to the starting shaft side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an excavator body recovery device in a tunnel excavator that collects and removes an excavator body through the pipe after a predetermined length of pipe is formed while excavating a tunnel in the ground with a tunnel excavator. It is about.

  In tunnel construction in which a tunnel is formed on the wall of the excavation wall while excavating the tunnel underground from the start shaft side with a tunnel excavator, the tunnel excavator reaches the reaching shaft. Then, it is carried out on the ground from this reach shaft and reused, but there is an existing human hole on the arrival side, or there is a building etc. in the vicinity and a reach shaft is provided. If there is no reaching shaft as in the case where there are no tunnel excavators or when two tunnel excavators are docked in the ground, or if the reaching shaft is not completed or the tunnel excavator is orthogonal to the existing long pipeline When it is reached, the tunnel excavator must be withdrawn toward the start shaft side and collected.

  As such a recovery-type tunnel excavator, for example, as described in Patent Document 1, a cylindrical outer shell whose outer diameter is substantially the same as that of the pipe, The excavator body is formed with a diameter smaller than the inner diameter of the conduit, and is connected to and supported by the outer shell body so that it can be pulled out rearward. A cutter head whose outer diameter is smaller than the inner diameter of the pipe is rotatably supported by a partition wall provided integrally with the front portion of the inner shell body. It has a structure including drive means and means for carrying out excavated earth and sand excavated by the cutter head.

Then, when the tunnel is excavated to a predetermined length by this tunnel excavator, the bogie equipped with equipment such as hydraulic equipment following the tunnel excavator and the carriage equipped with lining equipment materials are collected on the start shaft side. After that, all the running rails of these trucks are removed, while the cutter head of the tunnel excavator is reduced to the inner diameter of the tunnel lining body and the outer shell remains on the excavation wall surface. By pulling the inner shell body of the excavator body from the shell body into the rear part of the outer shell body, attaching the guide roller to the lower peripheral surface of the inner shell body, and then pulling the excavator body backward, the guide roller The excavator body is collected toward the start shaft side while rolling on the inner bottom surface of the pipe.
JP 2004-346688 A

  However, according to the excavator body recovery method in the tunnel excavator as described above, the excavator body cannot be recovered until the rails laid in the pipeline are removed. Not only is it time-consuming, but if the rail is removed, it can be used, for example, for loading and unloading the casting equipment when placing concrete on the inner peripheral surface of the outer shell that is left on the excavation wall. Disappear. Further, a guide roller is mounted on the lower peripheral surface of the excavator body as a conveying means, and the excavator body is recovered while rolling the guide roller on the inner bottom surface of the pipe. The inner bottom surface of the road may be damaged.

  In addition, when the length of the inner shell of the excavator body is short, it is difficult to secure an area where guide rollers can be mounted on both the front and rear sides of the lower peripheral surface of the inner shell. Even if the guide rollers can be mounted, the support of the excavator main body by these guide rollers becomes unstable, and there is a problem that the recovery operation becomes difficult.

  The present invention has been made in view of such problems, and its object is to form a predetermined length of a pipeline while excavating the tunnel with a tunnel excavator and then lay it in the pipeline. Provided is an excavator body recovery device in a tunnel excavator that can efficiently recover an excavator body in a stable transport state and without damaging a pipe line without removing the rail. It is in.

  In order to achieve the above object, an excavator body recovery device in a tunnel excavator according to the present invention comprises, as described in claim 1, an outer shell body provided with a ring-shaped first partition wall on an inner peripheral surface of a front end. And an inner shell body that is slidably contacted and supported by the first partition wall of the outer shell body, and a second partition wall is integrally provided at the front end of the inner shell body, and is provided on the back surface of the second partition wall. A tunnel excavator comprising an excavator body equipped with a rotation driving means for the cutter plate and a cutter plate rotatably supported by the excavator body, while excavating the tunnel in the ground, has a predetermined length. After forming the pipeline, it is a collection device when collecting the excavator main body through this pipeline, and the rail composed of sleepers and rails pre-laid in the pipeline and the cutter plate were removed The excavator body after cutting the diameter of the A pulling means for pulling out from the first bulkhead into the rear shell body, a guide member installed on the inner bottom surface of the outer shell body and guiding the excavator body pulled out from the first bulkhead into the rear shell body, and the guide member Lift means for lifting the upper excavator body to a position above the rail, a drawer rail installed on the inner bottom surface of the outer shell body and connecting the rear end to the front end of the rail, and the above-mentioned rail on the rail The excavator main body lifted by the lift means is received and transported on the rail.

  In the excavator body recovery device in the tunnel excavator configured as described above, the invention according to claim 2 is directed to the outside of the inner shell of the excavator body when the height of the drawer rail is pulled out from the height of the rail. It is characterized in that it can be changed to the height of the bottom surface.

  The invention according to claim 3 is configured so that the excavator main body can be recovered without using the drawer rail in the invention according to claim 1, and the ring is formed on the inner peripheral surface of the front end portion. An outer shell body provided with a first partition wall, an inner shell body that is slidably contacted and supported by the first partition wall of the outer shell body, and a second partition wall is provided at the front end of the inner shell body By a tunnel excavator comprising an excavator body provided integrally and mounted with a rotation driving means for the cutter plate on the back surface of the second partition wall, and a cutting plate rotatably supported by the excavator body, A recovery device for recovering the excavator body through the pipe after forming a predetermined length of the pipe while excavating the tunnel in the ground, and sleepers and rails previously laid in the pipe Or after removing the cutter plate and the cutter plate Pulling out the excavator main body after reducing the diameter of the plate into the outer shell behind the first bulkhead, and the excavator main body installed on the inner bottom surface of the outer shell and pulled out from the first bulkhead rearward A guide member configured to be guided into the outer shell body and to be raised to the height of the rail, and lift means for lifting the excavator body drawn on the guide member to a position above the rail. And a conveying means for receiving the excavator body lifted by the lifting means on the guide member raised to the height of the rail and traveling on the rail.

  In the invention according to claim 1 or claim 3, the invention according to claim 4 is provided with a function of rotating the excavator body 90 degrees in the front-rear direction in a state where the excavator body is lifted. Features.

  According to the first aspect of the present invention, the excavator main body pulled out from the first bulkhead of the outer shell of the tunnel excavator after forming a predetermined length of the pipeline while excavating the tunnel in the ground with the tunnel excavator Is a recovery device for recovering through the inside of this pipe line, the rail composed of sleepers and rails laid in advance in the pipe line, and after removing the cutter plate or reducing the diameter of the cutter plate Pulling means for pulling out the main body of the excavator from the first bulkhead into the rear shell body, and a guide for guiding the excavator body installed on the inner bottom surface of the outer shell body and pulled out from the first bulkhead into the rear shell body Since the member is provided, the excavator body pulled out from the first partition can be easily and reliably placed on the guide member as it is.

  Further, lift means for lifting the excavator body on the guide member to a position above the rail, a drawer rail installed on the inner bottom surface of the outer shell body and connecting the rear end to the front end of the rail, and the drawer Since the excavator main body lifted by the lift means on the rail is received and transport means such as a carriage that travels on the rail is disposed, the excavator main body is lifted by the lift means for the drawer. A space into which the conveying means can enter can be easily formed between the rail and the inner shell of the excavator body, and the excavator body receiving surface of the conveying means can be lifted by a lift. It can be accurately formed to be as low as possible as close as possible to the lower end surface of the excavator body, so it can be transported even in the narrow shell of the tunnel excavator It can allow the transport of the excavator body by stages.

  In addition, since the pull-out rail has a rear end connected to the front end of the rail, the conveying means can be continuously carried onto the pull-out rail from the rail, and at the receiving position of the excavator body. The excavator body that can be easily and accurately arranged and lifted by the lifting means can be efficiently loaded onto the conveying means, and in this state, while the conveying means is running on the rail, Can be carried out to the side. In this way, the excavator body can be recovered by the conveying means using the rail without removing the rail laid in the pipeline, and therefore the inner wall surface of the pipeline can be damaged. Therefore, the excavator body can be collected smoothly and efficiently.

  In the recovery apparatus according to claim 1, according to the invention according to claim 2, the height of the outer bottom surface of the inner shell of the excavator body when the height of the drawer rail is pulled from the height of the rail. Therefore, when the excavator body is pulled out from the first partition wall of the tunnel excavator onto the guide member, the height of the pull-out rail is set to the outer bottom surface of the inner shell of the excavator body. By setting the height, it can be installed with the guide member on the inner bottom surface of the outer shell of the tunnel excavator without interfering with the drawing work of the excavator body, and in addition, the guide member After being lifted by the lift means from above, the height is immediately raised to the height of the drawer rail, and the excavator body is transferred smoothly and efficiently from the lift means onto the drawer rail. Can.

  According to the invention according to claim 3, in the excavator body recovery device according to claim 1, the guide member has the function of the drawer rail without using the drawer rail. The guide member is configured to be able to be raised to the height of the rail, and the excavator body that is lifted by the lift means by allowing a conveying means such as a carriage to enter from the rail on the raised guide member. Since it is configured to be loaded and unloaded on the conveying means, the structure of the collection device can be simplified, and the installation work can be performed quickly and the collection work can be performed efficiently. It is desirable that a rail member whose rear end can be connected to the front end of the rail is laid on the guide member.

  Further, in the excavator body recovery device according to claim 1 or claim 3, the invention according to claim 4 is such that the lift means rotates the excavator body 90 degrees in the front-rear direction with the excavator body suspended. Because it is equipped with a function, even in a narrow shell in a tunnel excavator, it can be changed to a prone or supine posture at that position while maintaining the excavator body suspended. It can be easily recovered by placing it in a stable state with little posture or numbness on the conveying means in the posture.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a tunnel excavator that constructs a pipe line S made of a tunnel lining body such as a segment on the excavation wall surface while excavating the tunnel T. The tunnel excavator has a cylindrical outer shell 1 whose outer diameter is substantially the same as the tunnel excavating diameter, and an outer peripheral end face on the inner peripheral surface of the front end portion of the outer shell 1. A ring-shaped first partition wall 2 that is integrally fixed by welding or the like, and is formed by integrally fixing the outer peripheral surface of the front end portion of the annular portion 2a that opens in the front-rear direction to the inner peripheral end surface by welding or the like. The excavator body 3 is fitted and supported so as to be retractable toward the annular portion 2 a of the partition wall 2, the cutter plate 4 is rotatably supported by the excavator body 3, and the cutter plate 4 is rotated. Driving means 5, and the inner diameter of the annular portion 2 a of the first partition 2 is It has a smaller diameter than the inner diameter of road S.

  The excavator main body 3 is slidably contacted with the inner peripheral surface of the annular portion 2a of the first partition wall 2 so that the outer peripheral surface can be pulled out rearward, and has substantially the same length as the annular portion 2a. An annular inner shell 6 in which the front end edge is detachably connected to the front end edge of the annular portion by a bolt, and an outer peripheral end is fixed to the front end of the inner shell 6 and the inner end is fixed. The disk-shaped second partition wall 7 provided integrally with the shell body 6 and the rotation driving means 5 mounted on the back surface of the second partition wall 7 include the second partition wall 7. A meshing gear mechanism (not shown) disposed in the housing 8 provided integrally with the back surface of the housing 8 and a drive motor 5a attached to the back surface of the housing 8 are configured by the drive motor 5a. The rotary shaft 11 of the cutter plate 4 supported rotatably at the center of the excavator body 3 via It is configured to rotate.

  The cutter plate 4 has a disc-shaped central cutter plate portion 4a having an outer diameter smaller than the annular portion 2a of the first partition wall 2 and having a diameter that can pass through the annular portion 2a, An annular outer cutter plate portion 4b that is detachably connected by a bolt having an inner peripheral surface fitted to the outer peripheral surface of the central cutter plate portion 4a, and a bolt connected to the outer peripheral surface of the outer cutter plate portion 4b. The outer peripheral ring portion 4c is formed so that the outer diameter of the outer peripheral ring portion 4c of the outer peripheral cutter plate portion 4b is equal to the outer diameter of the outer shell 1 of the tunnel excavator. The central cutter plate portion 4a is fitted and fixed to the tip of the rotating shaft 11 projecting forward from the second partition wall 7 through a bolt or the like. Further, the outer cutter plate part 4b is divided into a plurality of parts in the circumferential direction and is connected to each other by bolts so as to be disassembled.

  Further, on the front surface of the cutter plate 4, a large number of cutter bits 9 are projected forward and a plurality of earth taking-in openings 4d are provided radially from the center portion toward the outer peripheral end portion, The earth and sand intake opening 4d is formed by a space between the back surface of the cutter plate 4 and the front surface of the first partition wall 2 and the second partition wall 7 with the front surfaces thereof being located on substantially the same vertical plane. The earth and sand take-up room 10 is connected.

  Further, the vertical plate portions of the reaction force receiving member 12 having an L-shaped cross section are removably attached to the excavator main body 3 at several locations on the outer periphery of the back surface by bolts, and the horizontal plate portions of these reaction force receiving members 12 are respectively removed. The outer shell 1 and the excavator main body 3 are detachably connected to the fixing member 12 'fixed to several locations on the inner peripheral surface of the shell 1 by bolts, and the reaction force receiving member 12 detachably connects the outer shell 1 and the excavator main body 3. ing.

  The outer shell body 1 is divided into a front body portion 1a and a rear body portion 1b, and the rear end portion of the front body portion 1a and the front end portion of the rear body portion 1b are connected to each other through a bent portion 13 so as to be refractable. The ring garter 14 is fixed to the inner peripheral surface of the front end portion of the rear trunk 1b, and a plurality of propulsion jacks 15 are supported in the ring garter 14 at regular intervals in the circumferential direction. The forward end of the rod of the propulsion jack 15 is brought into contact with the front end surface of the pipe S, and the tunnel excavator is propelled by extending the pipe S by taking a reaction force.

  Further, the inner peripheral surface of the front body part 1a and the rear body part 1b are connected by a plurality of middle folding jacks 16 arranged at regular intervals in the circumferential direction via the middle folding part 13, and An erector 17 is arranged in the front part of the front body 1a to assemble a segment on the excavation wall surface to form a pipe S composed of the tunnel lining body, and the excavated sediment is discharged from the sediment intake chamber 10 A mud pipe 18 and a mud pipe 19 are provided as soil discharging means.

  The tunnel excavator configured as described above is installed in a start shaft (not shown), and excavates the tunnel T in a predetermined direction while rotating the cutter plate 4. Each time a certain length of tunnel is excavated, segments are assembled on the excavation wall surface by an erector to cover the excavation wall surface, and the propulsion reaction force of the propulsion jack 15 is applied to the front end surface of the pipe line S composed of the tunnel lining body. The tunnel excavator A is moved forward by extending the propulsion jack 15. At this time, the propulsive force by the propulsion jack 15 is transmitted from the outer shell body 1 to the excavator main body 3 through the reaction force receiving member 12, excavating the natural ground while pressing the cutter plate 4 against the face, and the cutter plate The rotational reaction force 4 is received by the outer shell body 1 through the reaction force receiving member 12 and digs while preventing the rolling of the excavator body 3. The earth and sand excavated by the cutter plate 4 is taken into the earth and sand intake chamber 10 and discharged to the ground through the tunnel along with the muddy water by the return mud pipes 18 and 19 communicating with the earth and sand intake chamber 10. Is done.

  In this way, the tunnel excavator forms a pipe S of a predetermined length composed of the segment lining body while lining the excavation wall surface to a predetermined position with the segment, and then the excavator body 3 through the pipe S to the start shaft side. Move to work to collect.

  As shown in FIGS. 2 and 3, the recovery device for the excavator main body 3 is not shown in FIG. 2 and FIG. 3, and a rail 20 that is preliminarily laid in the pipe S for moving a subsequent carriage of the tunnel excavator. Pulls out the excavator main body 3 by pulling the excavator main body 3 from the annular portion 2a of the first partition wall 2 of the outer shell body 1 into the front body portion 1a of the outer shell body 1 through a wire rope, etc. A guide member 21 that supports the machine main body 3 and a plurality of functions that suspend and support the excavator main body 3 on the guide member 21 and rotate the excavator main body 3 up and down 90 degrees in a suspended state. Lift means 22 composed of a chain block; transport means comprising a carriage 23 on which the excavator body 3 rotated by 90 degrees is placed and moved on the rail 20 toward the start shaft; and the outer shell 1 From the slightly lower height than the guide member 21 on the inner bottom surface of the It is composed of a short pull-out rail 24 whose rear end is connected to the front end of the rail 20 when it is configured to be changeable up to the rail height.

  The rails 20 are installed between the both sides of the inner bottom surface of the pipe S, and the sleepers 2b arranged at intervals of one unit in the length direction of the pipe S and the parallels fixed on the sleepers 2b. Each time a tunnel part of a certain length is excavated by the above tunnel excavator, it follows the segment cart or tunnel excavator on the trajectory 20 while adding to the trajectory previously laid according to the excavation length. Then, a subsequent carriage (not shown) or the like that moves forward together with the tunnel excavator is moved, and the front end thereof is provided in the vicinity of the rear of the rear trunk portion 1b of the tunnel excavator.

  The guide member 21 is formed by fixing short leg portions 21b having a short fixed length to the front and rear end portions and the intermediate portion of the lower surface of the horizontal support base 21a having a constant width and length long in the front-rear direction. Two members 21 are detachably mounted on the lower peripheral part of the rear part of the front body part 1a of the outer shell 1 at a predetermined interval in the circumferential direction, and the horizontal upper surface of the excavator body 3 It is installed so as to have the same height as the drawing rollers 26 mounted on both the front and rear sides of the lower peripheral portion at the time of drawing. Further, the lifting means 22 composed of the chain block is arranged on both the front side, the rear side, and the middle side on the inner surface of the upper body portion of the front shell portion 1a of the outer shell 1, and the wires of these chain blocks. The rope is connected to both the upper and lower ends on the front and rear surfaces of the excavator main body 3 and the lower end both sides on the rear surface, and the direction of the excavator main body 3 is changed in the vertical direction by pulling out or rewinding these ear ropes. It is composed.

  As shown in FIGS. 4 and 5, the transport carriage 23 constituting the transport means includes a polygonal horizontal outer frame 23a for receiving the outer peripheral portion of the front surface of the second partition wall 7 of the excavator body 3, and the horizontal A mounting base 23 ′ composed of a rectangular horizontal inner frame 23b provided at the center of the outer frame 23a, the horizontal inner frame 23b being disposed at a small interval below the horizontal outer frame 23b, The rotating shaft 11 of the cutter plate 4 is fixed to the horizontal outer frame 23a through the connecting frame 23c and protrudes forward from the second partition 7 into the opening 23d surrounded by the horizontal inner frame 23b. The front end shaft portion is configured to be inserted and supported. Further, wheels 27 that rotate on the rail 20a of the rail 20 are attached to the front and rear sides of the lower surface of the transport carriage 23, and leg pieces 28, 28 are downwardly directed from the front and rear sides of the horizontal outer frame 23a. And projecting at the lower end of the leg pieces 28, 28 toward the direction perpendicular to the sleeper 20b in the state of being close to the upper surface of the both ends of the sleeper 20b on the outer side of the both side wheels 27, that is, toward the tunnel length direction. The members 29 and 29 for preventing toppling, which are horizontally disposed rods, are fixed.

  As shown in FIGS. 2 and 3, the drawer rail 24 has legs 30 having a fixed length (height) fixed to the longitudinal front and rear and intermediate portions of the lower end surface thereof. Two rails 24 are provided on the inner bottom surface of the front body portion 1a of the outer shell 1 between the guide members 21 and 21 on both sides in the circumferential direction with the same width interval as that between the rails 20a and 20a of the rail 20 in the circumferential direction. It is installed detachably. Furthermore, all the legs 30 can be folded outwardly at the lower leg 30a formed at a height lower than the height of the guide member 21 and the upper end of the lower leg 30a. The upper leg 30b is pivotally attached to the upper end 30b, and the upper leg 30b is raised above the guide member 21 so that the pull-out rail 24 is abutted against the front end surface of the rail 20a of the rail 20. It is configured to be continuous.

  In order to recover the excavator main body 3 using the recovery device configured as described above, first, the above-described erector 17 and the supply / discharge mud pipes 18 and 19 disposed in the outer shell 1 and the reaction force reception After disassembling and removing the member 12 and the like and collecting and removing it on the start shaft side, as shown in FIG. 6, after providing a space part where the excavator body 3 can be pulled out on the rear side of the excavator body 3, The guide members 21 and 21 are installed on the inner bottom portion of the front body portion 1a of the outer shell 1 at the rear of the excavator body 3 with a predetermined interval in the circumferential direction. At this time, the drawer rails 24, 24 are also installed together with the guide member 21, and the upper leg 30b is folded outward so as not to obstruct the extraction of the excavator body 3. The drawer rail 24 may be installed when the excavator body 3 is rotated 90 degrees in the vertical direction. In addition, the above-mentioned erector 17 and the supply and discharge mud pipes 18 and 19 are provided on a carriage (not shown) that travels on the rail 20 laid to the vicinity of the rear end of the outer shell 1 of the tunnel excavator. Mounted and collected on the start shaft side and removed.

  Further, an operator enters the earth and sand taking-in chamber 10 through an entrance (not shown) provided in the second partition wall 7 of the excavator body 3 and protrudes forward from the center portion of the cutter plate 4 and the second partition wall 7. The bolts connecting the tip of the rotary shaft 11 are removed and the connecting bolts between the outer cutter plate portion 4b and the central cutter plate portion 4a of the cutter plate 4 are also removed, while the lower end portion of the excavator main body 3 is removed. A pull-out roller 26 (shown in FIG. 7) is attached to both the front and rear sides so as to be positioned in front of the guide members 21 and 21 at the same interval in the circumferential direction with the guide members 21 and 21, respectively. After the connection between the ring portion 2a of the partition wall 2 and the inner shell 6 of the excavator body 3 is disconnected, the wire rope drawn from the pulling means such as a towing vehicle traveling on the rail 20 is used as the excavator body. 3 connected to the rear of the digging with this pulling means The excavator main body 3 is retracted while being pulled out from the annular portion 2a of the first partition wall 2 by fixing the inner shell body 6 of the excavator main body 3 to the outer shell body 1 by pulling the cutting machine main body 3. As shown in FIG. 7, it is placed on the guide member 21. At this time, the excavator body 3 is smoothly pulled out while the drawer roller 26 mounted on the lower peripheral portion of the excavator body 3 at the same height as the guide member 21 rotates on the guide member 21.

  Since the cutter plate 4 is separated from the excavator main body 3 by pulling the excavator main body 3 backward, the central cutter plate portion 4a of the cutter plate 4 is removed from the outer cutter plate portion 4b by using the above-described extraction means. Removed rearward, suspended temporarily with a wire rope on the annular portion 2a of the first partition 2, etc. and temporarily placed in the front end of the outer shell 1, and the outer cutter plate portion 4b has its outer ring portion 4c The outer shell 1 is left in contact with the excavation ground on the front side.

  The excavator body 3 drawn out on the guide member 21 is then lifted slightly by lift means 22 composed of a plurality of chain blocks mounted on the inner surface of the upper peripheral portion of the front body portion 1a of the outer shell 1. In this state, the posture can be changed from the state in which the second partition wall 7 is directed to the front to the prone state by being rotated 90 degrees in the vertical direction (front-rear direction). The lift means 22 may be mounted before the excavator body 3 is pulled out, or may be mounted after the pulling out.

  In order to rotate the excavator body 3 vertically by 90 degrees by the lift means 22, first, as shown in FIG. 8 to FIG. 10, both sides of the front part on the inner surface of the upper peripheral part of the front body part 1a of the outer shell body 1 are used. The wire ropes 22a of the lift means 22 disposed on the upper part are disposed on both sides of the upper end of the front surface of the excavator body 3, and the wire ropes 22b of the lift means 22 disposed on both sides of the intermediate part are disposed on the excavator body 3. The excavator body 3 is lifted slightly while maintaining the state in which the excavator body 3 is standing up, that is, the second partition wall 7 is directed to the front side, by linking the wire ropes 22a and 22b respectively connected to both sides of the upper end of the rear surface. The guide member 21 is then separated from the guide member 21 and suspended.

  Next, after connecting the wire ropes 22c of the lift means 22 disposed on both sides of the rear portion of the inner surface of the upper body portion of the front shell portion 1a of the outer shell body 1 to both sides of the lower end of the rear surface of the excavator body 3, FIG. As shown in FIG. 11, the wire rope 22c is pulled in the contracting direction, and the wire ropes 22a and 22b connected to both upper and lower end portions of the front and rear surfaces of the excavator body 3 are set according to the tensile amount of the wire rope 22c. While adjusting the amount of extension, the excavator body 3 is slowly rotated so that the upper end side moves forward and the rear end side moves rearward.

  When the excavator body 3 is rotated to some extent, as shown in FIGS. 12 to 14, the wire ropes 22a and 22a connected to both sides of the upper end of the front surface of the excavator body 3 are replaced with the wire ropes 22b and 22b of the intermediate portion. After moving the connecting portions to the both sides of the rear upper end of the connected excavator body 3, the excavator body 3 is further rotated in a prone direction. At this time, the excavator body 3 is formed so that its length (the length of the rotary shaft 11) is equal to or slightly shorter than the outer diameter of the excavator body 3 (diameter of the second partition wall 7). Even in a narrow space in the shell 1, it can be reliably rotated in the vertical direction (front-rear direction) in a suspended state without colliding with surrounding devices.

  When the excavator body 3 is prone until the second partition wall 7 is in a horizontal state and the rotary shaft 11 is in a vertical state as shown in FIGS. 15 and 16, the front of the outer shell 1 is shown in FIG. The both-side drawer rails 24, 24 installed on the inner bottom surface of the trunk 1a are raised by rotating the upper leg 30b upward with respect to the lower leg 30a of the leg 30. At the same time, the rail 20 and the rails 20a, 20a of the rail 20 laid on both sides of the rails 24, 24 and the rear portion of the outer shell 1 are extended so that the rail 20 extends. A recovery rail 20 'having the same structure is laid, and the pull-out rails 24, 24 are connected to the rails 20a, 20a of the rail 20 via the rail 20a of the recovery rail 20'. The recovery rail 20 'may be laid during the rotating operation of the excavator body 3 in the vertical direction.

  Next, the transport carriage 23 is carried on the pull-out rails 24, 24 from above the recovery rail 20 'while running on the rail 20 from the start shaft side, and then lift means 22 comprising a chain block as shown in FIG. The excavator main body 3 is lowered in a prone state while gradually extending the wire rope, and the rotation projecting vertically downward from the center of the second partition wall 7 facing the mounting table 23 'of the transport carriage 23 The shaft portion of the shaft 11 is inserted into the opening 23d in the horizontal inner frame 23b of the mounting table 23 ', and the outer periphery of the second partition wall 7 is received on the upper surface of the horizontal outer frame 23a of the mounting table 23'.

  In this way, the rotary shaft 11 protruding downward from the second partition wall 7 is inserted into the opening 23d in the horizontal inner frame 23b of the mounting table 23 'in the transport carriage 23, so that the excavator body 3 can be kept in a low posture. Since the outer peripheral portion of the second partition wall 7 can be mounted on the horizontal outer frame 23a of the mounting table 23 ', it can be mounted on the transporting carriage 23, so that the transporting carriage can be in a stable posture without causing any flickering or the like. The excavator body 3 can be carried out efficiently.

  When the excavator main body 3 is loaded on the transport carriage 23, the lift means 22 is unsupported by the wire rope, and then the transport carriage 23 is recovered from the rail 24 for collection in the outer shell 1 shown in FIG. As shown in FIG. 4 and FIG. 18 through 20 ′, the excavator main body 3 is collected and removed by moving on the rail 20 and running on the rail 20 toward the start shaft side in the pipeline S. It is. At this time, leg pieces 28 and 28 are provided so as to protrude downward on both sides of the horizontal outer frame 23a of the transport carriage 23, and between the lower ends of the leg pieces 28 and 28, the traveling wheels 27 of the transport carriage 23 are provided. In the state where the sleeper 20b on the outer side is close to the upper surface of both ends, the members 29 and 29 for preventing the fall of the transport carriage 23 are fixed, so that the transport carriage 23 tries to tilt left and right while traveling. However, it is possible to reliably prevent the toppling prevention member 29 from coming into contact with the sleepers 20b and tilting greatly, and to recover the excavator body 3 in a stable state.

  After the excavator main body 3 is collected, the transport carriage 23 is again carried up onto the drawer rail 24 installed in the outer shell 1 of the tunnel excavator, and as shown in FIG. After the central cutter plate portion 4a is mounted on the mounting table 23 ′ of the transfer carriage 23, the transfer carriage 23 is run on the rail 20 in the same manner as the excavator body 3 and is collected and removed on the start shaft side. Note that the outer cutter plate portion 4b of the cutter plate 4 is also removed from the outer ring portion 4c supported by the excavation wall surface and collected and removed by the transport carriage 23.

  Thus, after collecting the central cutter plate portion 4a and the outer cutter plate portion 4b of the excavator body 3 and the cutter plate 4, the propulsion jack 15, the bent jack 16 and the like are also collected and removed, and the first partition wall 2, the ring gutter 14, etc. After removing the guide member 21 and the pull-out rail 24, the outer ring body 4c and the outer ring portion 4c of the cutter plate 4 are left as the covering material for the excavation wall surface in the vicinity of the face. The tunnel lining body having the same inner diameter as the inner diameter of the pipe line S made of the tunnel lining body is formed by placing concrete on the inner peripheral surface. At this time, the concrete placement equipment is carried into the outer shell 1 using the rails 20 and 20 ', and after placement, the concrete placement equipment is carried out using the rails 20 and 20'.

  In the above embodiment, the excavator main body 3 and the central cutter plate portion 4a having a reduced diameter of the cutter plate 4 are separately collected, but the work in the outer shell 1 of the tunnel excavator is performed. If there is room in the space, the excavator body 3 and the central cutter plate portion 4a may be collected together without being separated.

  Further, in the above embodiment, when the excavator main body 3 is recovered, the excavator main body 3 is first pulled out on the guide member 21, and then the excavator main body 3 is lifted by the lift means 22, and then pulled out. The rail 24 is raised to the height of the rail 20 by the legs 30 and the excavator body 3 is mounted on the pull-out rail 24. The function of the rail 24 may be combined.

  FIG. 20 and FIG. 21 show the structure of the recovery device provided with the guide member 21 ′. This guide member 21 ′ is composed of several jacks arranged in series at a predetermined interval in the front-rear direction. A horizontal support 21a 'having a constant width and length that is long in the front-rear direction is fixed between the upper end surfaces of 21b' in an erected state, and two guide members 21 ', the front trunk 1a of the outer shell 1 are provided. It is configured to be detachably installed on the inner bottom surface of the rail 20 in the circumferential direction with the same width interval as between both rails 20a, 20a of the rail 20. Further, on the horizontal support 21a ′, a drawer rail 25 whose rear end can be connected to the front end of the rail 20 is laid, and the guide member 21 ′ is moved to the front barrel portion while the jack 21b ′ is contracted. In a state where the guide member 21 'is installed on the inner bottom surface of 1a, the height of the guide member 21' up to the drawer rail 25 is the drawer rollers 26 attached to both the front and rear sides of the lower peripheral part when the excavator body 3 is pulled out. Is configured to be the same height as the height from the inner bottom surface of the front body portion 1a to the drawing roller 26.

  Two guide members 21 ′ configured in this way are installed on both sides of the inner bottom surface of the front trunk 1 a when the excavator body 3 is collected, and the height of the excavator body 3 is reduced by contracting the jack 21 b ′. The drawer roller 26 is set to an acceptable height. After this state, the excavator body 3 is pulled by a wire rope drawn from a pulling means such as a towing vehicle traveling on the rail 20 in the same manner as described above, and the inner shell body 6 is fixed to the outer shell body 1. The excavator body 3 is moved backward while being extracted from the annular portion 2a of the first partition wall 2 and is placed on the guide member 21 '. At this time, the drawer roller 26 mounted on the lower peripheral portion of the excavator body 3 at the same height as the guide member 21 rotates on the drawer rail 25 on the horizontal support 21a 'of the guide member 21'. The excavator body 3 is pulled out smoothly. The cutter plate 4 separated from the excavator main body 3 is removed from the outer cutter plate portion 4b rearward using the above-mentioned pulling means or the like and temporarily placed in the front end portion of the outer shell body 1 in the same manner as described above. The outer peripheral cutter plate portion 4b is left in a state where the outer peripheral ring portion 4c is in contact with the excavation ground on the front side of the outer shell body 1.

  The excavator body 3 drawn out between the guide members 21 'and 21' is then slightly lifted by the lifting means 22 comprising a plurality of chain blocks mounted on the inner surface of the upper body 1a of the outer shell 1. In this state, it is lifted and rotated 90 degrees in the vertical direction (front-rear direction) as described above to change the posture from the state in which the second partition wall 7 is directed to the front to the prone state.

  In this way, when the excavator main body 3 prone until the second bulkhead 7 is in a horizontal state and the rotary shaft 11 is in a vertical state, the second bulkhead 7 is kept from the height of the rail 20 while maintaining the prone state. Is lifted to a slightly higher position by the lift means 22, and then the horizontal support base 21a 'is lifted by extending the jacks 21b' of the guide members 21 'and 21' on both sides and on the horizontal support base 21a '. The recovery rail having the same structure as that of the rail 20 so that the rail 20 is extended between the rail 20a and 20a of the rail 20 laid to the rear vicinity of the outer shell 1 and the rail 25 of the outer shell 1. 20 'is laid and the rear end of the pull-out rail 25 is continued to the rail 20a of the rail 20 through the rail 20a of the recovery rail 20'.

  Next, while carrying the carriage 23 from the start shaft side on the rail 20 and carrying it onto the pull-out rails 25 and 25 from the collection rail 20 ', the wire rope of the lift means 22 composed of the chain block is gradually While extending, the excavator body 3 is lowered in a prone state, and the shaft portion of the rotating shaft 11 protruding vertically downward from the center portion of the second partition wall 7 facing the mounting table 23 ′ of the transport carriage 23. The outer peripheral portion of the second partition wall 7 is received by the upper surface of the horizontal outer frame 23a of the mounting table 23 'while being inserted through the opening 23d in the horizontal inner frame 23b of the mounting table 23'.

  When the excavator body 3 is loaded on the transport carriage 23, the lift means 22 is unsupported by the wire rope, and then the transport carriage 23 passes from the pull-out rail 25 on the guide member 21 'through the recovery rail 20'. The excavator main body 3 is recovered and removed by moving it on the rail 20 and running on the rail 20 toward the start shaft side in the pipeline S.

  In any of the above embodiments, as the transport carriage 23, a carriage having a relatively high mounting table in which a horizontal outer frame 23a and a horizontal inner side 23b are arranged at intervals in the vertical direction. Is used, but the transporting cart with a low height provided with wheels that run on the rails 20 on the lower surface of the base plate that respectively supports the front and rear portions of the second partition wall 7 of the excavator main body 3 that faces downward. You may employ | adopt a conveyance means.

  An annular outer cutter plate 4b is detachably mounted on the outer periphery of the central cutter plate 4a as the cutter plate 4, and the annular cutter 2a of the first partition 2 is removed by removing the outer cutter plate 4b. A plurality of hollow spokes having a length slightly shorter than the radius of the annular portion 2a of the first partition 2 in the radial direction from the tip of the rotating shaft 11 The outer side spoke pieces are disposed in the hollow spokes so as to be able to protrude and retract in the extending direction from the hollow spokes by the operation of the hydraulic jacks disposed in the hollow spokes. It may be a spoke-type cutter head that protrudes toward the front of a plurality of excavation bits on the front surface of the outer peripheral spoke piece, and further, instead of the mud pipes 18 and 19 as a means for carrying out excavation earth and sand. Screw conveyor A tunnel excavator adopting the above may be used.

  Further, when the excavator main body 3 is collected, the excavator main body 3 is mounted on the transport carriage 23 in a state where the excavator main body 3 is rotated in a prone direction and the second partition wall 7 is directed downward. It may be mounted on the transport carriage 23 in a state in which the second partition wall 7 is turned upward by turning in the direction. Further, when the pipe S has a relatively wide space without rotating the excavator main body 3 by 90 degrees in this way, the annular portion 2a of the first partition 2 in the outer shell 1 is obtained. The standing excavator body 3 pulled out from the vehicle may be placed on the transport carriage 23.

A longitudinal side view of a tunnel excavator. The simplified side view of the whole collection | recovery apparatus mounted on a conveyance trolley with the excavator main body lying down. The simplified front view. The simplified side view of the state which is carrying out the excavator main body. The top view of a conveyance trolley. A vertical side view of a tunnel excavator with a mud pipe and an erector removed. The longitudinal section side view of the state where the excavator main body was pulled in on the guide member. The longitudinal side view of the state which suspended the excavator main body. The front view. The rear view. The vertical side view of the state which is rotating the excavator main body. The vertical side view of the state which is rotating the excavator main body to a substantially supine state. Front view The rear view. The vertical side view of the suspended support state which rotated the excavator main body to the supine state. The front view. The vertical side view of the state which carries a conveyance trolley to the lower part of an excavator main body. The simplified front view in the middle of carrying out an excavator main body. The longitudinal side view of the state which carries out the cutter board part of a diameter-reduced state. The front view which shows another embodiment of this invention. The side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer shell body 2 1st partition 3 Excavator main body 4 Cutter plate 5 Rotation drive means 6 Inner shell 7 Second partition
20 rail
21 Guide member
22 Lifting means
23 Transport cart
24, 25 Drawer rail

Claims (4)

  An outer shell body provided with a ring-shaped first partition wall on the inner peripheral surface of the front end portion, and an inner shell body slidably contacted and supported by the first partition wall of the outer shell body. An excavator main body in which a second partition wall is integrally provided at the front end of the main body, and a rotation driving means of a cutter plate is mounted on the back surface of the second partition wall, and a cutting plate rotatably supported by the excavator main body. A recovery device for recovering the main body of the excavator through the pipe after forming a predetermined length of the pipe while excavating the tunnel in the ground by the tunnel excavator provided. Rails composed of sleepers and rails laid, extraction means for extracting the excavator body from the first partition into the outer shell behind, and excavation installed on the inner bottom surface of the outer shell and extracted from the first partition A guide member for guiding the machine body into the rear shell body, and this guide Lift means for lifting the excavator body on the member to a position above the rail, a drawer rail installed on the inner bottom surface of the outer shell body and connecting the rear end to the front end of the rail, and on the rail An excavator main body recovery apparatus in a tunnel excavator, comprising: a transport means that receives the excavator main body lifted by the lift means and travels on the rail.   The pull-out rail is configured so that the height thereof can be changed from the height of the rail to the height of the outer bottom surface of the inner shell of the excavator body when pulled out. Excavator body recovery equipment for tunnel excavators.   An outer shell body provided with a ring-shaped first partition wall on the inner peripheral surface of the front end portion, and an inner shell body slidably contacted and supported by the first partition wall of the outer shell body. An excavator main body in which a second partition wall is integrally provided at the front end of the main body, and a rotation driving means of a cutter plate is mounted on the back surface of the second partition wall, and a cutting plate rotatably supported by the excavator main body. A recovery device for recovering the main body of the excavator through the pipe after forming a predetermined length of the pipe while excavating the tunnel in the ground by the tunnel excavator provided. Rails composed of sleepers and rails laid, extraction means for extracting the excavator body from the first partition into the outer shell behind, and excavation installed on the inner bottom surface of the outer shell and extracted from the first partition Guide the machine body into the rear shell and keep it at the height of the rail. A guide member configured to be able to ascend, lift means for lifting the excavator body drawn on the guide member to a position above the rail, and lifted by the lift means on the guide member raised to the height of the rail An excavator body recovery device for a tunnel excavator, comprising: a conveying means that receives the excavator body and travels on the rail.   4. The excavator body recovery device for a tunnel excavator according to claim 1 or 3, wherein the lift means has a function of rotating the excavator body 90 degrees in the front-rear direction while the excavator body is lifted. .

Images