JP2009263928A - Cutoff equipment and cutting process for underground obstacle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutoff equipment for an underground obstacle having an injection nozzle provided on a cutter head to jet high pressure water for cutting the obstacle while ensuring a space for installing a member such as a cutter bit sufficiently and to provide a cutting process by use of this cutoff equipment. <P>SOLUTION: In this cutoff equipment, a cutter bit mounting part 13 is provided on a cutter spoke 11 in the cutter head 10 of a shield machine 1, and the cutter bit 12 is attached to the cutter bit mounting part 13. If the cutter bit 12 is worn or damaged, it can be replaced with the other cutter bit 12. Instead of the cutter bit 12, an injection device 5 for cutting the underground obstacle can be attached to the cutter bit mounting part 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an underground obstacle cutting apparatus and a cutting method for cutting an underground obstacle such as an underground structure that is provided in a shield machine and remains buried in the ground.

When excavating underground with a shield machine, there may be underground obstacles such as underground structures that remain buried underground in the forward direction of travel. Such underground obstacles are obstructed by the shield machine, and are therefore removed by cutting. As a method for cutting an underground obstacle, an obstacle cutting method such as a remaining pile has been conventionally known (for example, see Patent Document 1). In this obstacle cutting method such as a remaining pile, the obstacle is cut by jetting high-pressure water mixed with an abrasive from the jet nozzle.
Japanese Patent No. 3417526

  However, in the obstacle cutting method disclosed in Patent Document 1, an injection nozzle is individually provided in the cutter head of the shield machine. For this reason, there is a problem that a space for providing the ejection nozzle has to be secured in the cutter head, and a space for providing a cutter bit or the like in the cutter head is reduced accordingly.

  Therefore, an object of the present invention is to use an underground obstacle cutting device and a cutting device that can provide a cutting means such as an injection nozzle in a cutter head while sufficiently securing a space for providing a member such as a cutter bit. It is to provide a cutting method.

  An underground obstacle cutting device according to the present invention that has solved the above problems is provided in a shield machine having a cutter face plate in which a cutter bit mounting portion to which a cutter bit is detachably attached is provided, and is an obstacle in the ground. A device for cutting an underground obstacle for cutting an object, comprising a cutting means that can be attached to and detached from a cutter bit mounting portion, and the cutting means is attached to the cutter bit mounting portion from which the cutter bit has been removed. is there.

  In the underground obstacle cutting device according to the present invention, the cutter bit is detached and attached to the cutter bit attaching portion provided in the shield machine. For this reason, since a dedicated space for installing the cutting means is not required, the cutting means can be provided in the cutter head while a sufficient space for providing a member such as a cutter bit is secured.

  Here, the cutter bit can be exchanged by an exchange jig that can be connected to the cutter bit mounting portion. When the cutter bit is removed, the cutter bit is connected to the face side of the cutter bit mounting portion. It can be set as the aspect in which the water stop member which stops water with the anti-face face side is provided.

  Thus, by using an exchange jig that can be connected to the cutter bit mounting portion, it is possible to easily perform the work when removing the cutter bit and attaching the cutting means. In addition, the replacement jig is provided with a water stop member for stopping water on the face side and the counter face side in the cutter bit mounting portion when the cutter bit is removed. For this reason, it is possible to prevent intrusion of groundwater or the like into the shield machine when the cutter bit is removed.

  Further, the cutting means may be an injection nozzle that injects a cutting solution.

  Thus, as the cutting means for cutting the underground obstacle, an injection nozzle for injecting the cutting solution can be suitably used.

  The cutting solution includes a solution main body and an abrasive mixed in the solution main body, and a solution pipe for supplying the solution main body and an abrasive pipe for supplying the abrasive are connected to the injection nozzle. In addition, both the solution pipe and the abrasive pipe can be made to be removable from the injection nozzle.

  Thus, as the cutting solution, a mixture of a solution main body (for example, water) and an abrasive mixed in the solution main body can be suitably used. Further, since the solution pipe for supplying the solution main body and the abrasive pipe for supplying the abrasive are both detachable from the injection nozzle, the solution pipe is attached when the injection nozzle is attached to the cutter bit mounting portion. And abrasive pipes can be kept out of the way.

  Furthermore, it can be set as the aspect provided with the rocking | swiveling member which supports an injection nozzle so that rocking | fluctuation is possible.

  By providing such a swinging member, when cutting an underground obstacle, the spraying direction of the cutting solution by the spray nozzle can be easily moved in a desired direction.

  On the other hand, the underground obstacle cutting method according to the present invention is a method for cutting an obstacle in the ground in front of a shield machine having a cutter face plate having a cutter bit mounting portion to which a cutter bit can be attached and detached. A method for cutting an obstacle, wherein a cutter bit attached to a cutter bit attachment portion is removed, a cutting means that is detachable from the cutter bit attachment portion is attached to the cutter bit attachment portion, and an underground obstacle is removed by the cutting means. It is characterized by cutting.

  At this time, the ground obstacle can be cut by the cutting means while rotating the cutter face plate.

  Thus, by cutting the underground obstacle while rotating the cutter face plate in this way, the underground obstacle is cut without using a means for moving the cutting means relative to the cutter face plate. be able to.

  According to the underground obstacle cutting device according to the present invention, it is possible to provide the cutter head with an injection nozzle that injects high-pressure water that cuts the obstacle while sufficiently securing a space for providing a member such as a cutter bit. .

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each embodiment, portions having the same function are denoted by the same reference numerals, and redundant description may be omitted. 1 is a front view of a shield machine equipped with an underground obstacle cutting device according to the present embodiment, FIG. 2 is a sectional side view of the cutter head, FIG. 3 is an exploded side view of an exchange jig, and FIG. It is a sectional side view of an apparatus.

  As shown in FIG. 1, the shield machine 1 according to the present embodiment includes a cutter head 10 serving as a cutter face plate. The cutter head 10 has a cutter pork 11 arranged in a cross shape when viewed from the front, and a plurality of cutter bits 12 for excavating a face are attached to the cutter pork 11.

  Further, as shown in FIG. 2, the cutter pork 11 is provided with a cutter bit attachment portion 13 to which a cutter bit 12 can be attached. The cutter bit attachment portion 13 has a cylindrical shape and is attached from the back surface side (counter face side) to the front surface side (face side) of the cutter pork 11. A through hole 15 is formed in the cutter bit attachment portion 13, and the cutter bit 12 is attached to the cutter pork 11 so as to penetrate the through hole 15. Further, a bolt hole is formed in the rear end portion of the cutter bit attachment portion 13.

  A lid member 14 can be attached to the rear end of the cutter bit attachment portion 13. The lid member 14 is attached to the rear end portion of the cutter bit attachment portion 13 by screwing a bolt into a bolt hole formed in the rear end portion of the cutter bit attachment portion 13. The lid member 14 closes the through hole 15 formed in the cutter bit attachment portion 13.

  Moreover, the cutter bit 12 is made detachable so that it can be removed from the cutter pork 11 by removing the lid member 14 as shown at a position X in FIG. Thus, the cutter bit 12 can be replaced with another cutter bit 12 when the cutter bit 12 is worn or damaged. When removing the cutter bit 12, an exchange jig 2 shown in FIG. 3 is used. The exchange jig 2 includes a connection body portion 21, a yoke member 30, and a gate member 40. The connection trunk | drum 21 has comprised the substantially cylindrical shape. A fitting portion 16 having substantially the same diameter as the connection barrel portion 21 is formed at the rear end portion of the cutter bit mounting portion 13, and the tip end portion of the connection barrel portion 21 is fitted to the fitting portion 16. It is possible. In addition, a hook member 22 is provided on the upper portion of the connection barrel 21, and when the connection barrel 21 is connected to the fitting portion 16 of the cutter bit attachment portion 13 at the rear end portion of the cutter bit attachment portion 13. A groove portion 17 is formed at a position where the tip of the hook member 22 contacts.

  Further, a yoke member 30 is connected to the rear end portion of the connection body portion 21. The yoke member 30 includes a yoke 31 serving as a hood of the present invention having a substantially U-shaped cross section, and a bit moving member 32 disposed behind the attachment portion. The yoke 31 includes an upper surface portion 31A, a lower surface portion 31B, and a back surface portion 31C. The rear end portions of the upper surface portion 31A and the lower surface portion 31B are respectively connected to the back surface portion 31C. Also, a bracket 23 is provided on the lower side surface of the rear end portion of the connection body portion 21, and the tip portion of the lower surface portion 31 </ b> B of the yoke 31 is attached to the bracket 23 so as to be rotatable. Further, the rear end portion of the upper surface portion 31A is rotatable with respect to the rear surface portion 31C.

  Further, the bit moving member 32 provided on the back side of the yoke 31 includes a push bull rod 33, and a bit holding member 34 is attached to the tip of the push bull rod 33. The push bull rod 33 is screwed into the back surface portion 31C of the yoke 31. By rotating the outer cylinder of the push bull rod 33, the inner rod member moves forward or backward relative to the yoke 31, and the inner rod member moves forward. And the bit holding member 34 moves forward and backward along with the backward movement.

  A protrusion is provided at the tip of the bit holding member 34, and a fitting hole in which the protrusion of the bit holding member 34 can be fitted is formed in the rear end surface of the cutter bit 12. The cutter bit 12 is held by the bit holding member 34 by fitting the protruding portion of the bit holding member 34 into the fitting hole formed in the cutter bit 12.

  In addition, the gate member 40 includes a gate plate 41 disposed on the lower surface side of the tip of the yoke 31 in the yoke member 30. A screw-shaped gate moving member 42 is provided on the side of the gate plate 41. By rotating the gate moving member 42, the gate plate 41 can move in the vertical direction (diameter cross-sectional direction of the yoke 31). Has been. Further, a gate plate receiving groove 43 is formed in the moving direction of the gate plate 41. When the gate plate 41 is moved by the gate moving member 42, the gate plate 41 is fitted into the gate plate receiving groove 43. Further, when the gate plate 41 is fitted into the gate plate receiving groove 43, the yoke 31 is closed by the gate plate 41, and water intrusion from the connection body portion 21 is prevented by the gate plate 41.

  Next, the injection device serving as the cutting means of the present invention will be described. As shown in FIG. 4, the injection device 5 includes an injection nozzle 50. The injection nozzle 50 is accommodated in a casing 51 and is slidable by a sliding mechanism 52 provided in the casing 51.

  The sliding mechanism 52 includes a pair of rotating screw rods 53 and a sliding body 54 that are disposed horizontally in the face direction, and a hydraulic pressure that rotates the rotating screw rod 53 at the end of the rotating screw rod 53. A motor 55 is attached. When the hydraulic motor 55 is operated, the rotating screw rod 53 rotates, and the sliding body 54 moves as the rotating screw rod 53 rotates. The spray nozzle 50 is fixed to the slide body 54, and the spray nozzle 50 moves as the slide body 54 moves.

  A ball valve 56 and a mouth packer 57 are provided at the tip of the injection nozzle 50. The ball valve 56 is a valve used when the valve is closed when the nozzle is replaced. The mouth packer 57 is used for tightening when water is prevented from leaking from the spray nozzle 50.

  As shown in FIG. 2, the injection device 5 can be attached to a cutter bit 12 by replacing it with a cutter bit 12 at the cutter bit attachment position in the cutter head 10. A position Y in FIG. 2 shows a state in which the injection device 5 is attached instead of the cutter bit 12.

  Further, a hose through hole (not shown) is formed in the lid member 14, and a first hose 58 and a second hose 59 that penetrate the hose through hole in the lid member 14 are connected to the injection nozzle 50. As schematically shown in FIG. 5, the shield machine 1 is provided with an ultra-high pressure pump 6 and an abrasive supply device 7. The first hose 58 is connected to the ultra high pressure pump 6, and the second hose 59 is connected to the abrasive supply device 7. By operating the ultrahigh pressure pump 6, ultrahigh pressure water is supplied to the injection nozzle 50 via the first hose 58. Further, by operating the abrasive supply device 7, the abrasive is supplied to the injection nozzle 50 via the second hose 59. In the injection nozzle 50, cutting water in which an abrasive is mixed with ultra-high pressure water is injected.

  In the shield machine 1 including the underground obstacle cutting device according to the present embodiment having the above-described configuration, when excavating a natural ground, the cutter bit 12 is attached to the cutter bit attaching portion 13 to perform excavation. . Further, when there is an underground obstacle such as a remaining pile in the traveling direction of the shield machine 1 during the excavation, the cutter bit 12 attached to the cutter bit attachment portion 13 is removed, and the cutter bit attachment portion is removed. The injection device 5 is attached to 13 and the underground obstacle is cut. The procedure from the removal of the cutter bit 12 to the attachment of the injection device 5 will be described below.

  The removal work of the cutter bit 12 is performed according to the procedure shown in FIGS. As shown in FIG. 6A, the cutter bit 12 is attached to the cutter bit attachment portion 13 in the cutter pork 11. In removing the cutter bit 12, the lid member 14 is first removed from the cutter bit attachment portion 13 by removing the bolt B from the cutter bit attachment portion 13.

  Next, as shown in FIG. 6B, the connection jig 21 in the exchange jig 2 is fitted into the fitting part 16 in the cutter pork 11, and the hook member 22 is hooked in the groove part 17, whereby the exchange jig 2 is Attached to the cutter bit attaching portion 13. At this stage, the gate plate 41 in the gate member 40 is in an open state. Subsequently, by rotating the outer cylinder of the push-bull rod 33, the inner rod member is advanced, and the bit holding member 34 is advanced. Then, as shown in FIG. 6C, the bit holding member 34 holds the cutter bit 12 by fitting the protruding portion of the bit holding member 34 into the fitting hole of the cutter bit 12.

  Thereafter, as shown in FIG. 7A, the direction opposite to the direction in which the outer cylinder of the push-bull rod 33 is rotated when the bit holding member 34 is advanced while the cutter bit 12 is held by the bit holding member 34. Then, the outer cylinder of the push-bull rod 33 is rotated, the bit holding member 34 is retracted, and the cutter bit 12 is drawn into the connection body 21. At this time, the gate moving member 42 in the gate member 40 is operated to raise the gate plate 41, and the upper end portion of the gate plate 41 is fitted into the gate plate receiving groove 43. By fitting the upper end portion of the gate plate 41 into the gate plate receiving groove 43, the connection body portion 21 is closed by the gate plate 41. By closing the connection body portion 21 with the gate plate 41 and stopping the connection body portion 21, it is possible to prevent water from entering the shield machine 1 from the cutter bit attachment portion 13.

  Thus, when the connection body 21 is stopped by the gate plate 41, the cutter bit 12 is removed from the bit holding member. After that, as shown in FIG. 7B, the yoke 31 is rotated around the bracket 23 to open the yoke 31, the upper surface 31A of the yoke 31 is rotated relative to the rear surface 31C, and the yoke 31 is opened. When the yoke 31 is opened, the cutter bit 12 is taken out from the opened portion. Thus, the work for removing the cutter bit 12 is completed.

  When the cutter bit 12 is removed, the mounting operation of the injection device 5 is performed. The operation of attaching the injection device 5 is performed according to the procedure shown in FIGS. When attaching the injection device 5, the tip of the injection device 5 is inserted into the connection body portion 21 as shown in FIG. Next, as shown in FIG. 8B, the yoke 31 is closed. In this way, the injection device 5 is sealed by the connection body 21 and the yoke member 30.

  Subsequently, the gate plate 41 is lowered to allow the connection body portion 21 and the cutter bit attachment portion 13 to communicate with each other. Thereafter, as shown in FIG. 8C, the injection device 5 is pushed out by the push bull rod 33. By pushing the injection device 5 by the push bull rod 33, the injection device 5 is caused to enter the cutter bit attachment portion 13.

  Then, as shown in FIG. 9A, when the injection device 5 is attached to the cutter bit attachment portion 13, the yoke member 30 and the connection body portion 21 are removed from the cutter bit attachment portion 13. Thereafter, as shown in FIG. 9 (b), the lid member 14 is attached to the cutter bit attachment portion 13, the first hose 58 and the second hose 59 are passed through the hose through hole in the lid member 14, and the first hose 58 and The second hose 59 is connected to the injection nozzle 50, and the replacement work between the cutter bit 12 and the injection device 5 is completed.

  Thus, in the shield machine 1 according to this embodiment, the cutter bit 12 and the injection device 5 can be attached to the cutter bit attachment portion 13. In the example shown in FIGS. 6 to 9, an example in which the cutter bit 12 and the injection device 5 are replaced is shown. However, the same procedure is performed when the broken or worn cutter bit 12 is replaced with a new cutter bit. Can be replaced.

  Thus, in the shield machine 1 according to the present embodiment, the cutter bit 12 is removed from the cutter bit attachment portion 13 provided in the shield machine 1 and the injection device 5 is attached. For this reason, since the space for exclusive use at the time of installing the injection apparatus 5 is not required, the injection apparatus 5 can be provided in the cutter head 10 while ensuring a sufficient space for providing a member such as the cutter bit 12.

  Further, by using the replacement jig 2, the cutter bit 12 can be removed from the cutter bit attaching portion 13 and the operation for attaching the injection device 5 can be easily performed. Furthermore, when the cutter bit 12 is removed, the gate member 40 and the yoke member 30 stop the water between the cutter bit mounting portion 13 and the inside of the shield machine 1. For this reason, it is possible to prevent intrusion of groundwater or the like into the shield machine 1 when the cutter bit 12 and the injection device 5 are exchanged.

  Next, a method for cutting an underground obstacle by the injection device 5 after the injection device 5 is attached to the cutter bit attachment portion 13 will be described. When cutting the underground obstacle, high-pressure water is supplied from the first hose 58 and abrasive is supplied from the second hose 59 to the injection nozzle 50 in the injection device. High-pressure water is supplied from the ultrahigh-pressure pump 6, and the abrasive is supplied from the abrasive supply device 7.

  The abrasive is mixed with the high-pressure water with respect to the high-pressure water supplied to the spray nozzle 50 to become the abrasive-mixed high-pressure water that is the cutting solution of the present invention. The abrasive mixed high-pressure water is jetted from the jet nozzle 50 toward the underground obstacle. The abrasive mixed high-pressure water sprayed from the spray nozzle 50 has a narrow spraying range in order to exhibit high cutting ability. For this reason, if the abrasive mixed high-pressure water sprayed from the spray nozzle 50 is sprayed to only one point, the underground obstacle cannot be cut. Therefore, the abrasive mixed high-pressure water is moved little by little while moving the spray nozzle 50 little by little. Is required to be injected.

  Therefore, in the shield machine 1 according to this embodiment, in order to move the spray nozzle 50, the cutter head 10 is rotated to move the spray nozzle 50 in the same manner as when the cutter bit 12 is attached and the shield tunnel is dug. Can do. Since the injection nozzle 50 is attached to the cutter bit attachment portion 13, the injection nozzle 50 can be moved little by little by rotating the cutter head 10. In this way, when the cutter head 10 is rotated to move the ejection nozzle 50, it is not necessary to separately provide a drive device for moving the ejection nozzle 50 or the like.

  Moreover, the other attachment aspect of a cutter bit is demonstrated. FIG. 10 is an enlarged cross-sectional side view of a cutter bit attached to the cutter head in another manner. As shown in FIG. 10, the cutter bit 12 is attached to a cutter bit attaching portion 60 provided in the cutter pork 11.

  The cutter bit mounting portion 60 includes a casing 61 fixed to the cutter pork 11. A through hole 62 having a diameter substantially the same as the outer diameter of the cutter bit 12 is formed in the casing 61. The cutter bit 12 passes through the through hole 62.

  A ball valve 63 is provided at a substantially central portion in the length direction of the through hole 62 in the casing 61. The ball valve 63 includes a valve body 64, and the valve body 64 has a through hole 65 having substantially the same diameter as the through hole 62. The ball valve 63 has a spherical outer shape, and can rotate 90 degrees around a rotation axis along a direction orthogonal to the length direction of the through hole 62. The ball valve 63 is provided with an urging member (not shown), and the ball valve 63 is urged by the urging member in a direction in which the valve body 64 closes the through hole 62.

  Further, a replacement cassette 66 is attached to the rear of the casing 61 (the wellhead side). The replacement cassette 66 is formed with a through-hole 67 having substantially the same diameter as the through-hole 62 formed in the casing 61. When attached to the casing 61, the through-hole 62 in the casing 61 and the replacement cassette are formed. The through hole 67 in 66 is coaxially arranged. The replacement cassette 66 can be detached from the casing 61 together with the cutter bit 12 when the cutter bit 12 is retracted relative to the cutter bit mounting portion 60 and pulled out of the casing 61.

  When the cutter bit 12 is removed from the cutter bit attachment portion 60, the jack 70 is disposed at the rear position of the cutter bit attachment portion 60. The jack 70 includes a first link mechanism 71 and a second link mechanism 72. The first link mechanism 71 includes two link members, and one end portions thereof are rotatably attached to each other. Moreover, the 2nd link mechanism 72 is similarly provided with the two link members, The one end parts are attached so that rotation is mutually possible.

  The other end portions of one of the first link mechanism 71 and the second link mechanism 72 are attached to the base end side bracket 73 so as to be rotatable. Further, the other end portions of the other links of the first link mechanism 71 and the second link mechanism 72 are attached to the front end side bracket 74 so as to be rotatable. The base end side bracket 73 can be fixed to the partition plate S in the shield machine. On the other hand, a replacement cassette fixing member 75 is attached to the front end side bracket 74.

  In the jack 70, the first link mechanism 71 and the second link mechanism 72 are driven symmetrically with each other, and the first link mechanism 71 and the second link mechanism 72 are changed to the non-bent / bent state. Stretch / shrink. Specifically, the jack 70 extends when the first link mechanism 71 and the second link mechanism 72 are not bent, and the jack 70 contracts when the first link mechanism 71 and the second link mechanism 72 are bent. .

  The cutter bit according to this aspect can also be replaced with an injection device. Hereinafter, with reference to FIG. 11, the exchange procedure of a cutter bit and an injection device is demonstrated. When exchanging the cutter bit and the injection device, first, the cutter bit 12 is removed from the cutter bit attaching portion 60. Therefore, as shown in FIG. 11A, the jack 70 is attached to the partition plate B, the jack 70 is extended, and the replacement cassette 66 is attached to the replacement cassette fixing member 75.

  Next, as shown in FIG. 11B, the jack 70 is contracted, and the cutter bit 12 is pulled out from the casing 61 in the cutter bit mounting portion 60. At this time, the ball valve 63 is rotated by the action of an urging member (not shown), and the through hole 62 is closed by the valve body 64. Thus, when the valve body 64 closes the through hole 62, dirt or the like is prevented from entering the chamber of the shield machine 1 from the through hole 62.

  When the cutter bit 12 is pulled out from the casing 61 in this way, the replacement cassette 66 is removed from the casing 61 together with the cutter bit 12 as shown in FIG. Thereafter, the replacement cassette 66 and the cutter bit 12 are removed from the jack 70. Also at this time, the through hole 62 in the casing 61 is closed by the valve body 64 of the ball valve 63, and the water stop state is maintained.

  Thereafter, the replacement cassette 66 to which the injection device 5 is attached is attached to the jack 70, and the jack 70 is extended. Then, the jack 70 is extended, and the injection device 5 is inserted into the through hole 62 in the casing 61. As the injection device 5 here, the one having substantially the same diameter as the cutter bit 12 is used.

  Then, the jack 70 is removed from the replacement cassette 66. Thus, the cutter bit 12 and the injection device 5 are exchanged. It is also possible to use such a configuration in which the cutter bit and the injection device are exchanged.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the injection nozzle 50 is fixed to the casing 51 in the injection device 5, but an aspect in which a swing mechanism that swings the injection nozzle 50 relative to the casing 51 is provided. Can do. The swing direction by the swing mechanism at this time is preferably a direction along the radial direction of the cutter head 10. By having a swinging mechanism that swings the spray nozzle 50 in a direction along the radial direction of the cutter head 10, the spray nozzle 50 can be directed to a position that cannot be directed only by rotating the cutter head 10. become.

  Moreover, in the said embodiment, although high pressure water and an abrasive | polishing material are supplied through separate piping, these can also be supplied together. Furthermore, in the said embodiment, although the injection nozzle which injects abrasive mixed high pressure water is used as a cutting | disconnection means, cutting devices other than an injection nozzle, for example, a cutter apparatus, etc. can also be used.

It is a front view of a shield machine equipped with a cutting device for underground obstacles. It is a sectional side view of a cutter head. It is an exploded side view of an exchange jig. It is a sectional side view of an injection device. It is a schematic diagram explaining piping connected to an injection nozzle. It is process drawing which shows the process of removing a cutter bit from a cutter bit attaching part. FIG. 7 is a process diagram illustrating a process following the process in FIG. 6. It is process drawing which shows the process of attaching an injection device to a cutter bit attaching part. It is process drawing which shows the process following FIG. It is an expanded sectional side view of the cutter bit attached to the cutter head in another aspect. It is process drawing which shows the process after removing a cutter bit and attaching an injection device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Shield machine 2 ... Replacement jig 5 ... Injection device 6 ... Super high pressure pump 7 ... Abrasive material supply device 10 ... Cutter head 11 ... Cutter bit 12 ... Cutter bit 13 ... Cutter bit attachment part 14 ... Cover member 15 ... Through Hole 16 ... Fitting part 17 ... Groove part 21 ... Connection body part 22 ... Hook member 23 ... Bracket 30 ... Yoke member 31 ... Yoke 31A ... Upper surface part 31B ... Lower surface part 31C ... Back part 32 ... Bit moving member 33 ... Push bull rod 34 ... Bit holding member 40 ... Gate member 41 ... Gate plate 42 ... Gate moving member 43 ... Gate plate receiving groove 50 ... Injection nozzle 51 ... Casing 52 ... Sliding mechanism 53 ... Rotating screw rod 54 ... Sliding body 55 ... Hydraulic motor 56 ... ball valve 57 ... mouth packer 58 ... first hose 59 ... second hose 60 ... cutter bit mounting part 61 ... casing 62 ... through hole 63 ... Valve valve 64 ... Valve body 65 ... Through hole 66 ... Replacement cassette 67 ... Through hole 70 ... Jack 71 ... Link mechanism 72 ... Link mechanism 73 ... Base end side bracket 74 ... Front end side bracket 75 ... Replacement cassette fixing member B ... Partition Board

Claims (7)

It is provided in a shield machine equipped with a cutter face plate in which a cutter bit mounting portion to which a cutter bit is detachably attached is formed, and is a ground obstacle cutting device for cutting an obstacle in the ground,
A cutting means that can be attached to and detached from the cutter bit mounting portion,
A cutting device for underground obstacles, wherein the cutting means is attached to the cutter bit attachment portion from which the cutter bit has been removed. The cutter bit can be replaced by a replacement jig that can be connected to the cutter bit mounting portion.
The ground fault according to claim 1, wherein when the cutter bit is removed, the replacement jig is provided with a water stop member that stops the face side and the counter face side of the cutter bit attachment portion. Thing cutting device.   The underground cutting apparatus according to claim 1, wherein the cutting unit is a spray nozzle that sprays a cutting solution. The cutting solution includes a solution body and an abrasive mixed in the solution body,
A solution pipe for supplying the solution main body and an abrasive pipe for supplying the abrasive are connected to the spray nozzle,
4. The underground obstacle cutting device according to claim 3, wherein both the solution pipe and the abrasive pipe are removable from the spray nozzle.   The underground obstacle cutting device according to claim 3 or 4, further comprising a swinging member for swingingly supporting the spray nozzle. A method for cutting an underground obstacle for cutting an obstacle in the ground in front of a shield machine provided with a cutter face plate having a cutter bit mounting portion in which the cutter bit is detachable,
Remove the cutter bit attached to the cutter bit mounting part,
Attaching to the cutter bit mounting portion is a cutting means detachably attached to the cutter bit mounting portion,
A method for cutting underground obstacles, characterized in that the underground obstacles are cut by the cutting means.   The ground obstacle cutting method according to claim 6, wherein the ground obstacle is cut by the cutting means while the cutter face plate is rotated.

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