JP2016169508A - Attachment/detachment jig for roller cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance efficiency of attachment/detachment work for a roller cutter, and mitigate burdens of an operator.SOLUTION: An attachment/detachment jig 60 for a roller cutter covers a part of the roller cutter exposed on a rear surface side of a cutter head of a shield machine, and includes a main body 70 engaged to the roller cutter in such a way as to disable relative rotation, and a tool connecting part provided on the main body 70 and having a booster gear wrench 90 connected thereto for applying rotational torque to the main body 70. The main body 70 includes a first side wall part 71 placed on a side of a blade of the roller cutter and a second side wall part 72 placed on the other side of the blade of the roller cutter when covered on the roller cutter, and a connecting part 73 disposed over the first side wall part 71 and the second side wall part 72 for integrating the side wall parts. The tool connecting part is provided on an outer surface on the opposite side of an inner surface of the connecting part 73 opposite the roller cutter when the main body 70 covers over the roller cutter.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a jig for attaching / detaching a roller cutter to / from an excavator.

  A shield machine (shield machine) is known as one of excavators that excavate natural ground such as sand, clay, bedrock, or composite ground of these, to create a tunnel. In the shield method, which uses a shield machine to build a tunnel, the tunnel walls are excavated with the shield machine and the segments are assembled to form the wall of the tunnel. That is, the tunnel is constructed by alternately repeating the shield machine and the assembly of the segments.

  A general shield machine has a cylindrical body part and a cutter head provided in front of the body part, and a plurality of roller cutters are mounted on the cutter head. The shield machine moves forward by extension of a jack disposed between the body part and an existing segment behind the body part. At this time, the cutter head rotates and the front ground is excavated (cut and crushed) by the roller cutter attached to the cutter head. The earth and sand generated during excavation is taken into the shield machine and carried out of the shield machine by the conveying means. Specifically, a chamber chamber partitioned by a partition wall is provided in front of the body portion of the shield machine, and a cutter head is provided in front of the chamber chamber. That is, the space between the cutter head and the partition wall is a chamber chamber. The cutter head is provided with a plurality of openings, and earth and sand generated during excavation enter the chamber chamber behind the cutter head from the openings. The earth and sand that has entered the chamber chamber is carried out to a space behind the chamber chamber by a screw conveyor or the like.

  Here, the roller cutter is formed of a hard metal such as steel, but it is gradually worn by use, and the excavation ability is lowered. Therefore, it is necessary to replace the roller cutter during tunnel excavation. For example, when the wear amount of the cutting edge reaches about 10 mm to 15 mm, it is necessary to replace the roller cutter (prior art document 1). The cutter head is sometimes referred to as “cutter face” or the like, and the roller cutter is sometimes referred to as “disc cutter” or “cutter bit”.

JP 2007-138437 A

  Replacement of the roller cutter during tunnel excavation is performed from the back side of the cutter head. That is, the hatch (sometimes called "manhole" etc.) provided in the partition is opened, the worker enters the chamber, removes the roller cutter from the cutter head, and installs a new roller cutter. The cutter head is provided with a plurality of mounting holes, and a roller cutter is fitted into each mounting hole. Specifically, when the roller cutter fitted in the attachment hole is rotated inside the attachment hole, the roller cutter engages with the attachment hole. On the other hand, when the roller cutter fitted in the attachment hole is rotated inside the attachment hole, the engagement between the roller cutter and the attachment hole is released. Therefore, conventionally, the tip of a bar inserted into the gap between the roller cutter and the mounting hole is hooked on the roller cutter to rotate the roller cutter.

  However, the diameter of a shield machine (body part) for excavating a small-diameter tunnel in which steel pipes and cables are laid is about 2 meters, and the total length is about 4 to 5 meters. Therefore, the chamber chamber which is only a part of the internal space of the body portion is narrow, and it is not easy to attach and detach the roller cutter as described above in the chamber chamber. Moreover, in order to rotate the roller cutter engaged with the mounting hole and release the engagement between the roller cutter and the mounting hole, it is necessary to apply a large rotational torque to the roller cutter. It was not easy to give the necessary rotational torque to the roller cutter. In general, the efficiency of attaching and detaching the roller cutter was inferior, and the burden on the workers was heavy.

  An object of the present invention is to improve the efficiency of the roller cutter attaching / detaching operation and reduce the burden on the worker.

  The roller cutter attaching / detaching jig of the present invention is a jig for attaching / detaching a roller cutter, in which a cutter body, in which an annular blade is integrally formed, is pivotally supported by a base to / from a cutter head of a shield machine. A roller cutter attaching / detaching jig according to the present invention is provided on a main body that covers a part of the roller cutter exposed on the back side of the cutter head and is engaged with the roller cutter in a relatively non-rotatable manner. And a tool connecting portion to which a tool for applying rotational torque to the main body is connected. When the main body is put on the roller cutter, the first side wall portion disposed on one side of the blade, the second side wall portion disposed on the other side of the blade, the first side wall portion, and the A connecting portion that integrates them across the second side wall portion, and the tool coupling portion has an inner surface of the connecting portion that faces the roller cutter when the main body is put on the roller cutter. It is provided on the outer surface on the opposite side.

  In one aspect of the present invention, the first side wall portion, the second side wall portion, and the connection portion are formed in an arc shape that curves along the blade.

  In another aspect of the present invention, the tool connecting portion is a polygonal columnar protrusion with which the tool is provided or with which a socket attached to the tool can be engaged.

  In another aspect of the present invention, there is provided a reaction force receiving member that is separate from the main body and supports the tool connected to the tool connecting portion in a non-rotatable manner.

  In another aspect of the present invention, the reaction force receiving member has a through hole into which the tool connected to the tool connecting portion is inserted, and is disposed so as to cover the main body around the main body.

  In another aspect of the present invention, the tool is a booster gear wrench, and the inner peripheral surface of the through hole of the reaction force receiving member meshes with spline teeth formed on the outer peripheral surface of the booster gear wrench. Spline teeth are formed.

  According to the present invention, the efficiency of the roller cutter attaching / detaching work is improved, and the burden on the worker is reduced.

It is sectional drawing of a shield machine. It is an enlarged view of the cutter head front surface shown by FIG. It is an enlarged view of the back surface of a partition shown by FIG. It is a perspective view of a roller cutter and an attaching part. It is a perspective view of the roller cutter fitted in the attaching part. It is a perspective view of the roller cutter rotated 90 degree | times within the attachment part. It is a perspective view which shows the fixing structure of the roller cutter with respect to an attaching part. It is a perspective view of a roller cutter attaching / detaching jig. It is a perspective view which shows typically the mounting state to the roller cutter of a roller cutter attachment / detachment jig. It is another perspective view of a roller cutter attaching / detaching jig. It is a perspective view which shows an example of a support stand. It is a perspective view which shows the use condition of a support stand. It is sectional drawing of the shield machine in which the conveyance stand was installed. It is a perspective view which shows the use condition of a conveyance stand and a conveyance box. It is a perspective view which shows another example of a reaction force receiving member.

  Hereinafter, an example of an embodiment of a roller cutter attaching / detaching jig of the present invention will be described in detail with reference to the drawings. The roller cutter attaching / detaching jig according to the present embodiment is a jig for attaching / detaching the roller cutter to / from the cutter head of the shield machine. Therefore, the shield machine and the roller cutter will be described, and then the roller cutter attaching / detaching jig according to the present embodiment will be described.

  As shown in FIG. 1, the shield machine 1 includes a substantially cylindrical body portion 2 and a cutter head 3 provided on the front surface of the body portion 2. As shown in FIGS. 1 and 2, the cutter head 3 has a dome shape and is supported so as to be rotatable with respect to the body portion 2. The cutter head 3 is equipped with a plurality of roller cutters 4. The roller cutter 4 is substantially spherical as a whole, and part of the radial direction is exposed on the front side of the cutter head 3, and the other part of the radial direction is exposed on the back side of the cutter head 3.

  As shown in FIG. 1, the interior of the body portion 2 is partitioned into a chamber chamber 6 and other space 7 by a partition wall 5. In other words, the space in front of the partition wall 5 in the internal space of the body portion 2 is the chamber chamber 6. Further, in the space 7 behind the partition wall 5, that is, the space 7 behind the chamber chamber 6, the assembling work and other work of the segment A are performed. Therefore, in the following description, the space 7 behind the chamber chamber 6 is referred to as “work space 7”. That is, the interior of the body portion 2 is partitioned into a chamber chamber 6 and a work space 7 by a partition wall 5, and the chamber chamber 6 is provided between the back surface 3 a of the cutter head 3 and the front surface 5 a of the partition wall 5. Yes.

  As shown in FIG. 3, the partition wall 5 is provided with an entrance / exit 8 for communicating the chamber chamber 6 (FIG. 1) and the work space 7 (FIG. 1), and a hatch 9 for opening / closing the entrance / exit 8. . The hatch 9 is rotatably attached to the partition wall 5 by a hinge, and the hatch 9 can be opened and moved into and out of the chamber chamber 6 as necessary.

  Refer to FIG. 1 again. A jack 10 is provided in the work space 7, and the shield machine 1 is advanced by the jack 10. In addition, a hydraulic motor 11 is provided in the work space 7, and the cutter head 3 is rotated by the hydraulic motor 11. Specifically, the jack 10 is expanded and contracted between the body part 2 and the existing segment A to advance the cutter head 3 together with the body part 2. Further, the output shaft of the hydraulic motor 11 passes through the partition wall 5 and is connected to the cutter head 3. When the hydraulic motor 11 is operated, the cutter head 3 is rotationally driven. In this way, by rotating the cutter head 3 while moving the body portion 2 and the cutter head 3 forward, a natural ground ahead is excavated by a part of the roller cutter 4 exposed to the front side of the cutter head 3. The

  The stroke of the jack 10 in this embodiment is about 1.5 meters. Therefore, when the shield machine 1 is moved forward by about 1.5 meters, the jack 10 is contracted, and a new segment A is assembled between the jack 10 and the existing segment A. Thereafter, the jack 10 is extended again between the newly assembled segment A and the body portion 2 to advance the shield machine 1. That is, the tunnel is dug while repeating excavation work and segment assembly work alternately. Although only one jack 10 is shown in FIG. 1, a plurality of jacks 10 are actually arranged along the inner periphery of the body portion 2.

  The earth and sand generated during excavation is taken into the shield machine 1 and carried out of the shield machine 1 by the transport means. As shown in FIG. 2, the cutter head 3 is provided with a plurality of openings 3b. Therefore, the earth and sand generated during excavation enter the chamber chamber 6 (FIG. 1) behind the cutter head 3 through the opening 3 b provided in the cutter head 3. As shown in FIG. 1, a screw conveyor 12 is disposed inside the body portion 2 so as to straddle the chamber chamber 6 and the work space 7, and the earth and sand that has entered the chamber chamber 6 is transferred to the work space 7 by the screw conveyor 12. To be carried to. The earth and sand carried out to the work space 7 by the screw conveyor 12 is taken over by the belt conveyor 13 and is carried to the rear of the shield machine 1 and is carried to a predetermined place (for example, a stand) by a slipping steel wheel or the like.

  Next, the roller cutter 4 shown in FIGS. 1 and 2 will be described. As described above, a plurality of roller cutters 4 are mounted on the cutter head 3, and these roller cutters 4 excavate (cut and crush) natural ground as the cutter head 3 rotates.

  As shown in FIG. 2, the cutter head 3 is provided with a plurality of attachment portions 20, and a roller cutter 4 is attached to each attachment portion 20. Since each roller cutter 4 has the same shape and structure, the shape and structure of the roller cutter 4, the mounting state with respect to the cutter head 3, and the like will be described below using an arbitrary one roller cutter 4 as an example.

  As shown in FIG. 4, the roller cutter 4 includes a substantially spherical cutter body 41 with an annular blade 40 integrally formed, and bases 42 a and 42 b that pivotally support the cutter body 41. The blade 40 is formed over the entire circumference of the cutter body 41, and projects in a flange shape on the radially outer side of the cutter body 41. The blade 40 has a mountain-shaped cross-sectional shape in which the root portion connected to the outer surface of the cutter body 41 is thickest and the tip portion farthest from the outer surface of the cutter body 41 is thinnest.

  The cutter body 41 is rotatably supported by a pair of bases 42a and 42b facing each other with the cutter body 41 interposed therebetween. Although not shown, the support shaft passes through the center of the cutter body 41 and penetrates the cutter body 41. One end of the support shaft protruding from the cutter body 41 is rotatably fixed to one base 42a via a bearing, and the other end of the support shaft protruding from the cutter body 41 is connected to the other base 42b via a bearing. It is fixed so that it can rotate freely. That is, the cutter body 41 penetrates the cutter body 41, and both ends thereof are supported by support shafts fixed to the bases 42a and 42b, respectively. The cutter shaft 41 rotates about the support shaft. In the state shown in FIG. 4, the support shaft penetrates the cutter body 41 in the vertical direction on the paper surface.

  Engagement portions 43a and 43b bulging in a direction away from the cutter body 41 are integrally formed in the respective bases 42a and 42b, and screw holes 44 are formed in the respective engagement portions 43a and 43b. Yes. In the present embodiment, two screw holes 44 are formed in each of the engaging portions 43a and 43b.

  On the other hand, the attachment portion 20 provided in the cutter head 3 has a substantially cylindrical shape that can accommodate the roller cutter 4. Both ends in the axial direction of the mounting portion 20 are open, and substantially ring-shaped fixing plates 21 and 22 projecting toward the center are integrally formed in each opening. Further, the fixing plate 21 located on the front side of the roller cutter 4 in the fitting direction has a pair of notches 23a and 23b for receiving the blade 40, and a pair of notches 24a and 24b for receiving the bases 42a and 42b. , Is formed. The notch 23a and the notch 23b are opposed to each other with the center of the mounting portion 20 in between. That is, the notch 23a and the notch 23b are provided at positions different from each other by 180 degrees. Further, the notch 24a and the notch 24b are opposed to each other with the center of the mounting portion 20 interposed therebetween. That is, the notch 24a and the notch 24b are provided at positions different from each other by 180 degrees. Further, the notches 23a and 23b and the notches 24a and 24b are provided at positions different from each other by 90 degrees, and the notches 23a and 23b are smaller than the notches 24a and 24b. In addition, through holes 25 are formed on both sides of the notches 23a and 23b.

  Next, a procedure for mounting the roller cutter 4 to the mounting portion 20 will be described. As shown in FIGS. 4 and 5, the position of the blade 40 of the roller cutter 4 and the positions of the notches 23 a and 23 b of the mounting portion 20 are matched, and the positions of the bases 42 a and 42 b of the roller cutter 4 and the mounting portion The roller cutter 4 is inserted into the mounting portion 20 in alignment with the positions of the 20 notches 24a and 24b. However, if one of the position of the blade 40 and the positions of the notches 23a and 23b or the positions of the bases 42a and 42b and the positions of the notches 24a and 24b are matched, the other position automatically matches.

  Thereafter, as shown in FIGS. 5 and 6, the roller cutter 4 inserted inside the attachment portion 20 is rotated 90 degrees to either the left or right inside the attachment portion 20. Here, it is assumed that the roller cutter 4 shown in FIG. 5 is rotated 90 degrees clockwise (clockwise). As shown in FIG. 6, when the roller cutter 4 is rotated 90 degrees, the engaging portions 43a and 43b provided on the bases 42a and 42b of the roller cutter 4 move to the inside (back side) of the notches 23a and 23b. To do. Here, the notches 23a and 23b are smaller than the engaging portions 43a and 43b. When the engaging portions 43a and 43b move to the inside of the notches 23a and 23b, the roller cutter 4 cannot be pulled out from the mounting portion 20. That is, the roller cutter 4 and the attachment portion 20 are engaged. Further, when the engaging portions 43a and 43b move to the inside of the notches 23a and 23b, the position of the through hole 25 and the position of the screw hole 44 shown in FIG. That is, the through hole 25 provided in the attachment portion 20 and the screw hole 44 provided in the roller cutter 4 communicate with each other.

  Next, as shown in FIG. 7, the fixing blocks 50 a and 50 b are applied to the fixing plate 21 of the mounting portion 20, and the fixing blocks 50 a and 50 b are fixed to the mounting portion 20 and the roller cutter 4. Specifically, each of the fixed blocks 50 a and 50 b is provided with a convex portion 51 that fits into the notches 23 a and 23 b provided on the fixing plate 21 of the mounting portion 20. An insertion hole 53 into which the bolt 52 is inserted is formed. Each insertion hole 53 is provided at a position communicating with a corresponding through hole 25 provided in the fixing plate 21. Here, as described above, the through hole 25 provided in the fixing plate 21 and the screw hole 44 (FIG. 5) provided in the roller cutter 4 are already in communication. Therefore, the convex portions 51 of the fixed blocks 50a and 50b are fitted into the notches 23a and 23b, and then the bolts 52 inserted into the insertion holes 53 are coupled to the screw holes 44 through the through holes 25. As described above, the roller cutter 4 inserted into the attachment portion 20 cannot be rotated inside the attachment portion 20. That is, the roller cutter 4 is attached to the cutter head 3 (FIGS. 1 and 2).

  When the roller cutter 4 attached to the cutter head 3 as described above is removed from the cutter head 3, the procedure is reversed. That is, the plurality of bolts 52 fixing the fixing blocks 50a and 50b are loosened and the fixing blocks 50a and 50b are removed. Thereafter, the roller cutter 4 is rotated 90 degrees to either the left or right to align the position of the blade 40 of the roller cutter 4 with the positions of the notches 23a and 23b of the mounting portion 20, and the base 42a of the roller cutter 4 The position of 42b and the position of the notches 24a and 24b of the attachment part 20 are matched. Next, the roller cutter 4 is pulled out from the mounting portion 20.

  As described above, in order to attach and detach the roller cutter 4 shown in FIGS. 1 and 2 to the cutter head 3, it is necessary to rotate the roller cutter 4 inside the attachment portion 20 provided in the cutter head 3. The roller cutter attaching / detaching jig according to the present embodiment is a jig capable of easily and reliably rotating the roller cutter 4 fitted in the attaching portion 20. Hereinafter, details of the roller cutter attaching / detaching jig according to the present embodiment (hereinafter also referred to as “attaching / detaching jig”) will be described.

  As shown in FIG. 8, the attachment / detachment jig 60 includes a main body 70 and a reaction force receiving member 80 that is separate from the main body 70. The main body 70 includes a first side wall portion 71, a second side wall portion 72, and a connection portion 73 that integrates them across the first side wall portion 71 and the second side wall portion 72. The first side wall portion 71, the second side wall portion 72, and the connection portion 73 are formed in an arc shape that curves along the blade 40 (FIG. 4) of the roller cutter 4, and the connection portion 73 is the first side wall portion 71. And straddling between the outer edges of the second side wall 72.

  As shown in FIG. 9, the main body 70 is put on a part of the roller cutter 4 exposed on the back side of the cutter head 3 (FIG. 1). For convenience of drawing, in FIG. 9, the main body 70 is illustrated as being put on the roller cutter 4 from above the roller cutter 4. However, as described above, the actual roller cutter attaching / detaching operation is performed on the back side of the cutter head 3 shown in FIG. Therefore, the actual main body 70 is put on the roller cutter 4 from the back side to the front side of the cutter head 3, that is, from the inside to the outside of the chamber chamber 6. In FIG. 9, the bases 42a and 42b (FIG. 4) included in the roller cutter 4 are not shown for the convenience of drawing.

  As shown in FIG. 9, when the main body 70 is put on the roller cutter 4, the first side wall portion 71 is disposed on one side of the blade 40 of the roller cutter 4, and the second side wall portion 72 is disposed on the blade 40 of the roller cutter 4. Arranged on the other side. Specifically, the inner surface of the first side wall portion 71 faces the one side surface of the blade 40 with almost no gap, and the inner surface of the second side wall portion 72 faces the other side surface of the blade 40 with almost no gap, and the connection portion 73. The inner surface of the is opposed to the tip (blade edge) of the blade 40. That is, when the main body 70 is put on the roller cutter 4, a part of the circumferential direction of the blade 40 exposed on the back side of the cutter head 3 (FIG. 1) is between the first side wall portion 71 and the second side wall portion 72. It is caught. As a result, the main body 70 placed on the roller cutter 4 engages with the roller cutter 4 so as not to be relatively rotatable.

  A tool connecting portion 74 is provided on the outer surface opposite to the inner surface of the connecting portion 73. In the present embodiment, a booster gear wrench 90 is used as a tool for applying rotational torque to the main body 70. Therefore, in the present embodiment, as the tool connecting portion 74, a polygonal columnar (hexagonal columnar) protrusion that can engage the socket 91 attached to the booster gear wrench 90 protrudes from the outer surface of the connecting portion 73. . The tool connecting portion 74 is disposed at the apex of the arc of the connecting portion 73, that is, at the highest position.

  As shown in FIG. 8, the reaction force receiving member 80 has an annular lower plate 81 and a disk-shaped upper plate 82. The lower plate 81 and the upper plate 82 are opposed to each other. Between the lower plate 81 and the upper plate 82, a plurality of side plates 83 that connect and integrate them are arranged at equal intervals along the circumferential direction. Yes.

  In the center of the upper plate 82, a tool mounting hole 84 is formed as a through hole into which the booster gear wrench 90 is inserted. Spline teeth 85 that mesh with the spline teeth 92 formed on the outer peripheral surface of the booster gear wrench 90 are formed on the inner peripheral surface of the tool mounting hole 84. A plurality of lightening holes 86 are formed around the tool mounting hole 84 at equal intervals along the circumferential direction.

  As shown in FIG. 10, the reaction force receiving member 80 is disposed so as to cover the main body 70 around the main body 70 covered with a roller cutter (not shown). As a procedure, first, the main body 70 is put on a roller cutter (not shown). As described above, the main body 70 placed on the roller cutter engages with the roller cutter so as not to rotate relative to the roller cutter. Thereafter, the reaction force receiving member 80 is put on the main body 70 from the front side of the main body 70 covered with the roller cutter, and locked or fixed to the back surface of the cutter head so as not to rotate. Thereafter, the booster gear wrench 90 is inserted into the tool mounting hole 84 (FIG. 8) of the reaction force receiving member 80, and the socket 91 attached to the tip of the booster gear wrench 90 is connected to the tool connecting portion 74 (FIG. 9). . At this time, the spline teeth 85 (FIG. 8) formed on the inner peripheral surface of the tool mounting hole 84 mesh with the spline teeth 92 (FIG. 8) formed on the outer peripheral surface of the booster gear wrench 90. Therefore, the main body of the booster gear wrench 90 connected to the tool connecting portion 74 is non-rotatably supported by the reaction force receiving member 80 that is locked or fixed to the cutter head 3 so as not to rotate.

  Thereafter, as shown in FIG. 9, an arbitrary tool (ratchet wrench B in the present embodiment) is connected to the booster gear wrench 90 and rotational torque is input to the booster gear wrench 90. The booster gear wrench 90 increases the output rotational torque and outputs it. The booster gear wrench 90 used in this embodiment increases the input torque by about 7 times and outputs it. The rotational torque output from the booster gear wrench 90 is transmitted to the main body 70 via the tool connecting portion 74 and is transmitted to the roller cutter 4 via the main body 70. In this way, the rotational torque is transmitted to the roller cutter 4, and the roller cutter 4 rotates inside the mounting portion 20 (FIG. 2). As a result, the roller cutter 4 is engaged with the attachment portion 20 or the engagement of the roller cutter 4 with the attachment portion 20 is released.

  As described above, by using the roller cutter attaching / detaching jig 60, it is possible to easily and reliably apply the necessary rotational torque to the roller cutter 4 even in the narrow chamber chamber 6. Therefore, the efficiency of the roller cutter attaching / detaching work is improved and the burden on the worker is reduced.

  However, the roller cutter 4 has a weight of around 100 kilograms, and it is difficult to support the roller cutter 4 with only human power when the roller cutter 4 is inserted into and removed from the attachment portion 20 of the cutter head 3. In particular, in order to put the roller cutter 4 in and out of the attachment portion 20, it is necessary to suppress the inclination of the roller cutter 4 and keep the roller cutter 4 substantially horizontal. However, it is not easy to keep the roller cutter 4 having a weight of around 100 kilograms substantially horizontal only by human power. Therefore, for example, it is preferable to use a support base 100 as shown in FIG. The support base 100 includes a receiving plate 101 that is curved following the opening of the mounting portion 20 (FIG. 4), and a pair of insertion portions 102 that are fixed to the receiving plate 101. Each insertion portion 102 has a round bar shape, one end side is fixed to the inner surface of the receiving plate 101 by welding, and the other end side protrudes from the receiving plate 101.

  As shown in FIG. 12, when the protruding portion of the insertion portion 102 is inserted into the through hole 25 (FIG. 4) provided in the fixing plate 21 of the mounting portion 20, the receiving plate 101 is disposed in front of the fixing plate 21. The That is, the support base 100 is disposed in front of the opening of the mounting portion 20. Therefore, the roller cutter 4 can be inserted inside the mounting portion 20 by pushing the roller cutter 4 placed on the receiving plate 101 forward. Further, by pulling the roller cutter 4 inside the mounting portion 20 backward, the roller cutter 4 can be pulled out on the receiving plate 101. As described above, when the support table 100 is used when the roller cutter 4 is taken in and out of the mounting portion 20, the weight of the roller cutter 4 is supported by the support table 100, and therefore the roller cutter 4 can be easily and reliably kept substantially horizontal. be able to. Further, the roller cutter 4 is prevented from dropping off.

  Furthermore, when the old roller cutter 4 removed from the cutter head 3 is carried out from the chamber chamber 6, for example, a transport table 110 as shown in FIG. 13 can be used. The transport table 110 is made of metal, and as shown in FIG. 14, the transport table 110 has an elongated bottom surface 111 and side surfaces 112 rising from long sides facing the bottom surface 111, and has a shape like a bowl as a whole. . As shown in FIG. 13, the transport table 110 is arranged so as to straddle the inside and outside of the chamber chamber 6 through the entrance 8 of the partition wall 5. Therefore, the roller cutter 4 removed from the cutter head 3 can be placed on the conveyance table 110 and slid on the conveyance table 110 to be carried out from the chamber chamber 6. As shown in FIG. 14, the roller cutter 4 can be transported in a dedicated transport box 120 in order to prevent the roller cutter 4 from overturning during transport. A grip part 121 is provided on each of the front surface and the back surface (not shown) of the transport box 120, and the transport box 120 can be pushed or pulled by grasping the grip part 121. Further, V-grooves 122 are respectively formed on the front surface and the back surface (not shown) of the transport box 120, and the roller cutter 4 can be stabilized by fitting the blades 40 of the roller cutter 4 into the V-grooves 122. it can. It goes without saying that the transport table 110 and the transport box 120 described here can also be used when a new roller cutter 4 attached to the cutter head 3 is carried into the chamber chamber 6. Note that a hanging metal fitting 130 for hooking a hook of a chain block (not shown) is attached to the roller cutter 4 shown in FIG. The hanging metal fitting 130 is attached to and detached from the roller cutter 4 as necessary to facilitate the conveyance of the roller cutter 4. In addition, a hook of a chain block (not shown) may be hooked on the grip portion 121 of the transport box 120 in order to pull the transport box 120.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the booster gear wrench 90 that is one of the manual tools is used as a tool for applying rotational torque to the main body 70 of the attachment / detachment jig 60. However, the tool for applying the rotational torque to the main body 70 is not limited to a specific tool, and for example, a power tool including a power source such as an electric motor or an air motor can be used. In this case, the power tool main body is fixed to the reaction force receiving member 80. Further, the shape and size of the main body 70 can be appropriately changed according to the shape and size of the target roller cutter 4. Furthermore, the shape and dimensions of the reaction force receiving member 80 can be changed as appropriate. For example, the reaction force receiving member 80 shown in FIG. 15 can be used instead of the reaction force receiving member 80 shown in FIG. The reaction force receiving member 80 shown in FIG. 10 and the reaction force receiving member 80 shown in FIG. 15 are basically used in the same manner. However, the reaction force receiving member 80 shown in FIG. 15 is placed on the main body 70 of the attachment / detachment jig 60 shown in FIG. The reaction force receiving member 80 shown in FIG. 15 has the advantage of being small and light and easy to handle compared to the reaction force receiving member 80 shown in FIG. However, when sufficient rotational torque can be applied to the main body 70 without using the reaction force receiving member 80 shown in FIGS. 10 and 15, these reaction force receiving members 80 can be omitted. The reaction force receiving member 80 only needs to be relatively unrotatable with respect to the main body 70, and the target to which the reaction force receiving member 80 is engaged or fixed is not limited to the cutter head 3.

  In addition to the through hole 25 shown in the drawing, an additional through hole may be provided in the fixing plate 21 of the mounting portion 20 shown in FIG. In such a case, the insertion part 102 of the support base 100 shown in FIG. 11 may be inserted into an additional through hole.

DESCRIPTION OF SYMBOLS 1 Shield machine 2 Body part 3 Cutter head 4 Roller cutter 5 Bulkhead 6 Chamber room 7 Space (work space)
DESCRIPTION OF SYMBOLS 10 Jack 11 Hydraulic motor 12 Screw conveyor 13 Belt conveyor 20 Mounting part 21,22 Fixing plate 25 Through-hole 40 Blade 41 Cutter body 42a, 42b Base 43a, 43b Engagement part 44 Screw hole 50a, 50b Fixed block 52 Bolt 53 Insertion hole 60 Roller cutter attaching / detaching jig (detaching jig)
70 Main body 71 First side wall portion 72 Second side wall portion 73 Connection portion 74 Tool connecting portion 80 Reaction force receiving member 81 Lower plate 82 Upper plate 83 Side plate 84 Tool mounting hole 85, 92 Spline teeth 90 Boosting gear wrench 91 Socket 100 Support base 110 Transport stand 120 Transport box A Segment B Ratchet wrench

Claims (6)

A jig for attaching and detaching a roller cutter on which a cutter body integrally formed with an annular blade is pivotally supported by a base to and from a cutter head of a shield machine,
A main body that is put on a part of the roller cutter exposed on the back side of the cutter head and is engaged with the roller cutter so as not to be relatively rotatable;
A tool connecting portion provided on the main body and connected with a tool for applying a rotational torque to the main body;
When the main body is put on the roller cutter, the first side wall portion disposed on one side of the blade, the second side wall portion disposed on the other side of the blade, the first side wall portion, and the A connecting portion that integrates them across the second side wall, and
The tool connecting portion is provided on the outer surface opposite to the inner surface of the connection portion facing the roller cutter when the main body is put on the roller cutter.
Roller cutter attaching / detaching jig. The roller cutter attaching / detaching jig according to claim 1,
The first side wall part, the second side wall part, and the connection part are formed in an arc shape that curves along the blade,
Roller cutter attaching / detaching jig. The roller cutter attaching / detaching jig according to claim 1 or 2,
The tool connecting portion is provided with the tool, or is a polygonal column-shaped protrusion with which a socket mounted on the tool can be engaged.
Roller cutter attaching / detaching jig. The roller cutter attaching / detaching jig according to any one of claims 1 to 3,
It is a separate body from the main body, and has a reaction force receiving member that supports the tool coupled to the tool coupling portion in a non-rotatable manner.
Roller cutter attaching / detaching jig. The roller cutter attaching / detaching jig according to claim 4,
The reaction force receiving member has a through hole into which the tool connected to the tool connecting portion is inserted, and is disposed so as to cover the main body around the main body.
Roller cutter attaching / detaching jig. The roller cutter attaching / detaching jig according to claim 5,
The tool is a boost gear wrench;
Spline teeth that mesh with the spline teeth formed on the outer peripheral surface of the booster gear wrench are formed on the inner peripheral surface of the through hole of the reaction force receiving member.
Roller cutter attaching / detaching jig.

Images