JP2000096987A - Cutter device for shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter device capable of stabilizing and switching the excavation position and the non-excavation position of a roller cutter, easily and safely performing the change of the roller cutter, suppressing a construction cost and reducing a construction period. SOLUTION: A roller support member 19, and a rotating support mechanism 18 for rotatably supporting the roller support member 19 on a cutter spoke 4 are provided, and since a roller cutter 15 is constituted to be switched to the excavation position and the retraction position by rotating the roller support member 19 through the rotating support mechanism 18, during bedrock part excavation, a bedrock part can be suitably excavated by the roller cutter 15. During soil and sand part excavation, the roller support member 19 is rotated to the retraction position of the roller cutter 15 through the rotating support mechanism 18 at the time of change of the roller cutter 15, so that the roller cutter does not make hindrance for soil and sand excavation, and the change of the roller cutter 15 can be safely performed from the inside of the cutter spoke 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter for a shield excavator used for excavating a tunnel, and more particularly to a rotary cutter installed on a front surface of the shield excavator. The present invention relates to a shield machine for a cutter which is suitable for both excavations.

[0002]

2. Description of the Related Art A shield excavator is widely used as a drilling device for constructing various shield tunnels (water and sewage tunnels, subway tunnels, communication cable tunnels, tunnels for common ditch, etc.) by a shield method. ing. 2. Description of the Related Art In recent years, a rotary cutter device (also called a cutter head) has been provided in front of an excavator body as a shield excavator for rock, hard ground, and earth and sand. A shield machine having a plurality of roller cutters and a plurality of teeth cutters is employed. Each roller cutter excavates rocks, and each tooth cutter excavates earth and sand. A dome-type or disk-type cutter device is used depending on conditions such as the amount of gravel, the diameter of gravel, the strength of gravel, and the quality of rock. Note that these shield machines are also provided with an overcutter device (also called a copy cutter device) for excavation on the outer peripheral side of the cutter device.

[0003] The shield machine is configured such that the amount of protrusion of the roller cutter from the cutter spokes is greater than the amount of protrusion of the teeth cutter (that is, the roller cutter precedes), thereby making excavation of the rock mass suitable. Can be done. Of course, at the time of excavation of the rock, if the protrusion amount of the tooth cutter becomes larger than the protrusion amount of the roller cutter, the tooth cutter is broken. On the other hand, at the time of excavation of the earth and sand portion, the advance of the roller cutter not only hinders the earth and sand excavation but also causes uneven wear of the roller cutter.

[0004] For example, in a shield machine described in Japanese Utility Model Laid-Open No. 5-27197, there is described a cutter device capable of at least arbitrarily adjusting a projection amount of a roller cutter. This cutter device includes a plurality of hydraulic cylinders, and adjusts the amount of protrusion of the roller cutter arbitrarily by adjusting the rod portion of the hydraulic cylinder so as to extend and retract.

[0005] In order for this cutter device to function, the rod portion of the hydraulic cylinder is protruded and the roller cutter is switched to the excavation position (the roller cutter precedes the tooth cutter). In order to maintain the roller cutter at the excavation position, the thrust of the hydraulic cylinder must always be equal to or greater than a predetermined value against external force acting on the roller cutter.

[0006]

As described above, in the cutter device for a shield excavator, especially when excavating a rock mass, the roller cutter must be maintained at a position preceding the tooth cutter. Therefore, it is necessary to always maintain a state in which a constant hydraulic pressure is applied to the hydraulic cylinder. For example, the hydraulic supply system that supplies hydraulic pressure to the hydraulic cylinder body (including the rod section) or the hydraulic cylinder is caused by muddy water or mud. If it is damaged, the hydraulic cylinder cannot maintain a constant hydraulic pressure, and the protrusion of the roller cutter cannot be adjusted. Further, when the wear of the roller cutter exceeds a predetermined value and the excavating ability is reduced or the roller cutter is damaged for some reason, the roller cutter cannot be replaced because it is under the soil water pressure of the face.

SUMMARY OF THE INVENTION It is an object of the present invention to stabilize and switch a digging position and a non-digging position of a roller cutter in a shield machine, and to easily and safely replace the roller cutter. And to reduce the construction cost and shorten the construction period.

[0008]

According to a first aspect of the present invention, there is provided a cutter machine for a shield machine having a plurality of roller cutters on a front surface thereof, wherein a roller support for rotatably supporting each of the roller cutters. A roller support member rotatably supporting the roller support member on a roller mounting frame, and rotating the roller support member and the roller cutter via the rotation support mechanism, thereby providing a roller cutter. Can be switched between an excavation position and a retreat position.

At the time of excavation of the rock mass, the roller cutter can be switched to the excavation position by rotating the roller support member and the roller cutter via the rotation support mechanism.
With this roller cutter, the rock portion can be suitably excavated. When excavating the earth and sand portion or replacing the roller cutter, once the excavation of the shield excavator is stopped, and the roller support member and the roller cutter are rotated via the rotation support mechanism, so that the roller cutter is in the retracted position. The roller cutter can be switched, so that the roller cutter does not hinder earth and sand excavation, uneven wear can be suppressed, and the roller cutter can be safely replaced from within the roller mounting frame.

A second aspect of the present invention is a cutter device for a shield machine, wherein the roller cutter at the retracted position is configured to be inspectable and replaceable. By rotating the roller support member and the roller cutter via the rotation support mechanism, the roller cutter can be switched to the retracted position, and the roller cutter can be safely inspected and replaced from within the roller mounting frame at the retracted position. be able to. According to a third aspect of the present invention, there is provided a cutter machine for a shield excavator according to the first aspect of the present invention, further comprising a rotary seat forming member formed with a rotary seat with which the roller support member is rotatably engaged. Is characterized in that a seal member for sealing the inner surface side is provided. Since the seal member seals the space between the roller support member and the rotary seat forming member (roller mounting frame), the inflow of earth and sand and the like passing through the space is prevented, and the roller support member rotates smoothly.

According to a fourth aspect of the present invention, there is provided a cutter apparatus for a shield excavator according to any one of the first to third aspects, wherein the rotary support mechanism is fixedly provided on a roller mounting frame and has a partial spherical surface or a partial spherical surface. A roller support member having a cylindrical surface is provided. The roller support member can be stably held at any of the excavation position and the retreat position of the roller cutter, so that the roller cutter can be stably operated at each switching position without depending on the thrust of the hydraulic cylinder or the like. Can be held.

According to a fifth aspect of the present invention, there is provided a cutter machine for a shield machine, wherein the rotary seat is formed on a rotary seat forming member fixed to a roller mounting frame. It is possible to switch between the excavation position and the evacuation position without interference. Since the roller cutter can be switched between the excavation position and the retracted position without interfering with the partial spherical surface or the partial cylindrical surface of the rotary seat, the position of the roller cutter can be switched smoothly and quickly.

According to a sixth aspect of the present invention, there is provided a cutter machine for a shield excavator according to the fifth aspect of the present invention, wherein a reaction force for transmitting the excavation load acting on the roller support member from the roller support member to the rotary seat forming member. A support member is provided. The earth load acting on the roller cutter during excavation is transmitted to the roller support member, transmitted from the roller support member to the reaction force support member, and transmitted from the reaction force support member to the roller mounting frame via the rotary seat forming member. Therefore, the supporting force of the roller cutter is stably and reliably transmitted through the reaction force supporting member.

According to a seventh aspect of the present invention, there is provided a cutter apparatus for a shield excavator according to any one of the first to third aspects, wherein the roller supporting member is rotated manually or by a rotation driving means. The present invention is characterized in that a unit is provided. The roller support member can be rotated by operating the operation unit manually or by a rotation drive unit from within the roller mounting frame. Therefore, the position of the roller cutter can be switched safely and easily.

According to an eighth aspect of the present invention, there is provided a cutter machine for a shield excavator according to any one of the first to third aspects, wherein a plurality of roller cutters arranged in the longitudinal direction of the roller mounting frame are provided. A coupling mechanism for interlocking and connecting the roller support members so as to rotate and drive the roller support members synchronously; and a rotation driving means capable of rotating the plurality of roller support members via the coupling mechanism. It is characterized by the following. Once the excavation of the shield machine is stopped, the rotation driving means is driven, and the plurality of roller supporting members in the roller mounting frame can be simultaneously rotated via the connecting mechanism, and the position of the plurality of roller cutters can be switched. Can be done quickly.

According to a ninth aspect of the present invention, there is provided a cutter machine for a shield excavator according to any one of the first to third aspects, wherein the excavated soil-like material is caused to flow backward on the back side of the roller cutter. A flow opening is provided.

When excavating the rock, the roller cutter can be switched to the excavation position by rotating the roller support member and the roller cutter via the rotation support mechanism. Excavation can be suitably performed. At the excavation position of the roller cutter, the excavated earth and sand-like material flows backward from the flow opening. When excavating the earth and sand portion or replacing the roller cutter, once the excavation of the shield excavator is stopped, and the roller support member and the roller cutter are rotated via the rotation support mechanism, so that the roller cutter is in the retracted position. Switching, the roller support member can close the flow opening, therefore, the roller cutter does not hinder the excavation of earth and sand, uneven wear can be suppressed, and replacement of the roller cutter is hindered by earth and sand or water It can be performed safely from within the roller mounting frame.

According to a tenth aspect of the present invention, there is provided a cutter machine for a shield machine according to the ninth aspect of the present invention, wherein a waterproof casing for preventing water and earth and sand is detachably provided on a rear surface of the face plate. The roller cutter is configured to be inspectable and replaceable by attaching and detaching the roller cutter. By rotating the roller support member and the roller cutter via the rotation support mechanism, the roller cutter is switched to the retracted position, the roller support member closes the flow opening, and the water blocking casing is detached in this state. Thus, the inspection and replacement of the roller cutter can be performed safely from within the roller mounting frame without being hindered by earth and sand or water. Other effects are the same as those of the ninth aspect.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. First, the schematic structure and operation of the shield machine will be described, and then the cutter device will be described. As shown in FIG. 1 and FIG.
The drilling machine 1 has a body member 2 as a skin plate, and a cutter device (cutter head) 3
It is arranged on the front end side of. The cutter device 3 includes a plurality of radially arranged cutter spokes 4 (corresponding to a roller mounting frame) and a plurality of connecting frames 10a arranged at appropriate circumferential intervals on the rear end side of the cutter spokes 4. It has an annular cutter drum 5 integrally connected through the same. The cutter device 3 includes a cutter rotation drive mechanism (a plurality of cutter drive motors 7, a pinion gear 7).
a, a ring gear 8 and a slewing bearing 8a).

A chamber 9 is formed on the rear side of the cutter device 3 inside the body member 2, and an access passage forming wall 10 is formed on the rear side of the cutter device 3 for forming an access passage through which an operator can enter. The access passage forming wall 10 includes the connecting frame 10a (in which an operator can move), a box forming wall 10b that forms a working space behind the cutter spokes 4, and the like.

A partition structure 11 for supporting the cutter rotation drive mechanism 6 and mounting the cutter drum 5 is provided inside the body member 2 behind the chamber 9. The partition structure 11 includes a central wall 11a and an inner cylindrical wall 11
b, annular walls 11c, 11d, 11f and outer cylinder wall 11e
And The cutter drum 5 is rotatably mounted in an annular space between the inner cylindrical wall 11b and the outer cylindrical wall 11e, and a plurality of seal members 12a and bearings 12b are mounted on both inner and outer sides of the cutter drum 5.

The plurality of shield jacks 13 are for generating thrusts for excavation, are arranged rearwardly, and their jack bodies 13a are fixed inside the body member 2. These shield jacks 13 take a reaction force on segments (not shown) already covered on the inner surface of the tunnel to generate excavating thrust. Further, inside the body member 2, earth discharging equipment, an erector device (all not shown) and the like are provided.

As shown in FIG. 2, the cutter device 3 has a ring member 3A having an outer diameter substantially equal to that of the body member 2 and a plurality of ring members connected to the ring member 3A. It has a cutter spoke 4, a plurality of roller cutters 15 provided on each of the cutter spokes 4, and a plurality of overcutter devices 16 provided on the outer peripheral side of the cutter device 3. Roller cutter 15
Each is a cutter spoke 4 or a cutter face plate 4c
The roller cutters 15 are rotatably supported by
Arranged to be different radial positions from each other, the radial position is set so as to be able to excavate uniformly on the excavation surface,
The roller cutters 15 are particularly applied for excavating a rock mass. As shown in FIG. 3, a plurality of tooth cutters 17 are mounted on the front surface of the side plate 4b of the cutter spoke 4, and the tooth cutters 17 are particularly applied to excavate earth and sand.

Next, the operation of the shield machine described above will be described. At the time of normal excavation in which a tunnel is dug straight, a plurality of shield jacks 1 are used.
The cutter driving motor 7 generates the thrust for excavation at 3.
Is driven, the pinion gear 7a rotates, the ring gear 8 rotates, and the cutter drum 5 rotates. As a result, since a large number of roller cutters 15 or a large number of teeth cutters 17 excavate the face while rotating, a tunnel having a circular cross section is excavated. The excavation is interrupted every time a predetermined one ring is excavated, and a segment is assembled to the latest excavated one ring portion on the inner surface of the tunnel using an erector device or the like, and thereafter the excavation is resumed.

Next, the cutter device 3 will be described in detail. As shown in FIGS. 3 and 4, in order to rotatably support each roller cutter 15 of the cutter device 3 and switch between the excavation position and the retreat position, a rotation support mechanism 18 is provided.
A roller support member 19 is provided. One or more rows of roller support members 19 are provided in the longitudinal direction of the cutter spoke 4 between the pair of side plates 4b of each cutter spoke 4 and at the front end side of the side plate 4b via a rotation support mechanism 18. The roller cutter 15 is provided with the respective roller support members 19.
The cover 19a is rotatably supported by the roller support member 19 and is exchangeably supported by attaching and detaching a lid 19a detachably attached to the roller support member 19.

A rotary seat forming member 20 is integrally fixed to a pair of side plates 4b, 4b of each cutter spoke 4 so as to face each other, and a partial spherical surface (on the opposing surface side of both rotary seat forming members 20). Concave or partially cylindrical rotating seat 2
0a are respectively formed. Partially spherical (convex) such that both side portions of the roller support member 19 are rotatably engaged with the pair of rotary seats 20a between the two rotary seats 20a.
Or it is formed in a partial cylindrical surface shape. That is, the rotation support mechanism 18 is mainly composed of the rotary seat 20a and the partial spherical surface or the partial cylindrical surface of the roller support member 19, and one line is provided between the rotary seat 20a and the partial spherical surface of the roller support member 19. The above-mentioned (two rows in this figure) seal members 21 are mounted, and the roller support member 19 that rotatably supports the roller cutter 15 is rotatable by the rotation support mechanism 18.

The seal member 21 is formed of the rotating seat forming member 2.
0, and are respectively accommodated in two seal grooves 19b formed in parallel with each other and formed on both partial spherical surfaces or both cylindrical surfaces and both end surfaces, between the roller support member 19 and the rotary seat forming member 20. Seal the gap between the two. Roller support member 19 and rotary seat 2
Grease supply path 2 for supplying grease between the first grease
0b and the grease filling portion are a pair of rotary seat forming members 20.
And the roller supporting member 19 is configured to rotate smoothly. Although two seal grooves 19b are provided above and below the rotary seat forming member 20, either one of the upper and lower seal grooves has no functional problem.

In the state shown in FIG. 3, the roller cutter 1
5 is the excavation position protruding from the front end of the cutter spoke 4, the protrusion amount δ1 of the roller cutter 15 from the cutter spoke 4 becomes larger than the protrusion amount δ2 of the teeth cutter 17, and the roller cutter 15 is ahead of the teeth cutter 17. Then, excavation of the rock mass can be performed by the roller cutter 15. At this excavation position, the roller shaft 15a is positioned eccentrically forward of the center 20b of the rotary seat 20a.

In a state where the roller cutter 15 is held at the excavation position for excavating the rock, the reaction force support member 22 is stretched over the rear ends of the pair of rotary seat forming members 20 and is detachably bolted. . The earth load acting on the roller cutter 15 during excavation is transmitted to the roller support member 19 and transmitted from the roller support member 19 to the reaction force support member 22 via the seal wall plate 24 provided at the bottom of the roller support member 19, The earth load is transmitted from the reaction force support member 22 to the cutter spoke 4 via the rotary seat forming member 20. The seal wall plate 24 prevents inflow of earth and sand into the inside of the cutter spoke 4. In a state where the reaction force support member 22 is fixed, the roller support member 19 cannot rotate.

As shown in FIG. 5, in order to switch the roller cutter 15 from the excavation position to the retracted position, the water stopping casing 23 is detachably bolted to the same attaching / detaching position as the reaction force supporting member 22. The casing 23 prevents water and earth and sand from entering the inside of the cutter spokes 4, and in this water-stop state, the roller support member 19 is rotatable. That is, the water stopping casing 23 is provided with the roller supporting member 1.
9 and the roller seat 15 so as not to interfere with the roller cutter 15.
It is formed on or outside a virtual spherical surface that is continuous with the partial spherical surface of Oa.

FIG. 5 shows a state in which the roller cutter 15 is switched to the retracted position by rotating the roller support member 19 and the roller cutter 15 through the rotary seat 20a by 180 degrees. When the roller cutter 15 is at the retracted position, the seal wall plate 24 is formed so as to be substantially flush with the front end of the rotary seat forming member 20, so that the tooth cutter 17 can precede when excavating the earth and sand portion. When the roller cutter 15 is switched to the retracted position, the roller cutter 15 is configured to be replaceable from within the cutter spoke 4 (see FIG. 6).

As shown in FIG. 4, the roller support member 19 and the roller cutter 15
Hexagon nut 19c for rotating the shaft (corresponding to the operation unit)
By operating the hexagon nut 19c manually or by a drive source (not shown) from within the cutter spoke 4, the roller support member 19 and the roller cutter 15 are individually rotated and retracted from the excavation position. Position or vice versa.

As shown in FIG. 4, each cutter spoke 4
When the plurality of roller support members 19 are simultaneously rotated synchronously, the connecting mechanism 25 and the rotation drive device 26 capable of rotating the plurality of roller support members 19 are provided for each cutter spoke 4. Provided. The connection mechanism 25 connects the shaft members 25a protruding from both the roller support members 19 on both sides toward the length direction of the cutter spoke 4 and the shaft members 25a of the adjacent roller support members 19 respectively. And a coupling 25b. In addition, the shaft-like member 2
The axis center of 5a coincides with the center of rotation of the roller support member 19. Note that the rotation drive device 26 may be provided for a part of the roller cutters 15 in the cutter spokes 4 in one row.

The rotation driving device 26 has a worm wheel 26a externally mounted on a part of the shaft member 25a, a worm gear 26b meshing with the worm wheel 26a, and a drive motor 26c for rotating the worm gear 26b. . The drive motor 26c is fixed to, for example, the side plate 4b of the cutter spoke 4, and driven by the drive motor 26c, the worm gear 26b rotates, and the worm wheel 2
6a rotates, the shaft-like member 25a rotates, and the plurality of roller support members 19 and roller cutters 15 in one row of cutter spokes 4 simultaneously rotate to switch from the excavation position to the retreat position or vice versa. Can be

Next, the operation of the above-described cutter device 3 will be described. As shown in FIG. 3, when excavating the rock, the roller cutter 15 is held at the excavation position, and the reaction force support member 22 is fixed to the rotary seat forming member 20. In this state, the roller support member 19 cannot rotate, and the protrusion amount δ1 of the roller cutter 15 becomes larger than the protrusion amount δ2 of the teeth cutter 17. Therefore, when excavating the bedrock, the roller cutter 15 is moved ahead, the cutter device 3 is rotated by the cutter drive motor 7, and the bedrock can be efficiently excavated by the roller cutter 15.

As shown in FIGS. 4 and 5, when excavating the earth and sand layer other than the bedrock, the rotation of the cutter device 3 is temporarily stopped, the reaction force supporting member 22 is removed, and instead, The casing 23 is fixed to the rotating seat forming member 20. In this state, the roller support member 19 and the roller cutter 15 are rotatable, and the roller support member 19 and the roller cutter 15 are individually rotated by manually operating the hex nut 19c from within the cutter spoke 4. To switch from the excavation position to the evacuation position. When the plurality of roller support members 19 are simultaneously rotated in synchronization,
By driving the drive motor 26c of the rotary drive device 26 to rotate the worm gear 26b, rotate the worm wheel 26a, rotate the shaft member 25a, and simultaneously drive the plurality of roller support members 19 in the cutter spokes 4 in each row. To switch all the roller cutters 15 in all the cutter spokes 4 to the retracted position.

By switching the roller cutter 15 to the retracted position in this way, a large number of teeth cutters 17 can precede the excavation of the earth and sand portion, and the cutter device 3 is rotated by the cutter driving motor 7 so that the large number of teeth cutters are rotated. 17 enables efficient excavation. As described above, the tunnel can be excavated by appropriately switching the roller cutter 15 between the excavation position and the retreat position (non-excavation position) according to the properties of the ground, and the roller cutter 15 can be thrust by a hydraulic cylinder or the like at each position. , And can be stably held without depending on.

When the roller cutter 15 is replaced due to wear or breakage, the cover 19a of the roller support member 19 is removed in the retracted position shown in FIG. 5, the water stopping casing 23 is removed, and FIG. As shown, the roller cutter 15 is replaced from within the cutter spoke 4. At this time, the worker can connect the connection frame 1 to the access passage forming wall 10.
0a and the inside of the box forming wall 10b to approach the cutter spoke 4 for replacement. In this manner, the roller cutter 15 can be easily and safely replaced from the inside of the cutter spokes 4 without being disturbed by water or earth and sand. Therefore, construction such as ground improvement is not required, and the roller cutter 15 can be safely and quickly replaced.

According to the cutter device 3 described above, at the time of excavation of the bedrock, the roller cutter 15 is rotated from the front end of the cutter spoke 4 by rotating the roller support member 19 via the rotation support mechanism 18. The excavation position can also be switched to a protruding excavation position, and the rock cutter 15 can be appropriately excavated by the roller cutter 15. When excavating the soil or when replacing the roller cutter 15,
Once the excavation of the cutter device 3 is stopped, the roller support member 1
By rotating the roller cutter 9 via the rotation support mechanism 18, the roller cutter 15 can be switched to the retracted position retracted into the cutter spoke 4, and therefore, the roller cutter 1 can be switched.
The roller 5 does not hinder earth and sand excavation and can suppress uneven wear, so that the roller cutter 15 can be safely replaced from within the cutter spoke 4.

[0040] The rotary seat formation member 20, the gap between the seal member 21 for sealing the inner surface side is arranged, by the seal member 21 and the roller support member 19 and the rotating seat forming member 20 To prevent the inflow of soil and the like, and the roller support member 19 rotates smoothly. Since the roller support member 19 is rotatably supported by a partially spherical or partially cylindrical rotating seat 20a fixedly provided on the cutter spoke 4, any one of the excavation position and the retreat position of the roller cutter 15 is provided. The roller support member 19 can also be stably held at the position, so that the roller cutter 15 can be stably held at each switching position without depending on the thrust of the hydraulic cylinder or the like.

Since the roller cutter 15 can be switched between the excavation position and the retracted position without interfering with the partial spherical surface or partial cylindrical surface of the rotary seat 20a, the position of the roller cutter 15 can be switched smoothly and quickly. Can be.

The excavation soil load acting on the roller support member 19 is transferred from the roller support member 19 to the rotary seat forming member 2.
0, the earth load acting on the roller cutter 15 during excavation is transmitted to the roller support member 19 and transmitted from the roller support member 19 to the reaction force support member 22 so that the reaction force is transmitted. The power is transmitted from the support member 22 to the cutter spoke 4 via the rotary seat forming member 20. Therefore, the roller supporting force for supporting the roller cutter 15 is stably and reliably secured.

Since the hex nut 19c for manually operating and rotating the roller support member 19 is provided, the hex nut 19c is operated from within the cutter spoke 4 to rotate the roller support member 19 and the roller cutter 15. Can move. Therefore, the position of the roller cutter 15 can be switched safely and easily.

When the plurality of roller supporting members 19 for the plurality of roller cutters 15 are driven to rotate synchronously, a connecting mechanism 25 for interlocking the roller supporting members 19 is connected.
And a plurality of roller support members 1 through the connecting mechanism 25.
9 is provided, the excavation of the shield machine 1 is temporarily stopped, the rotation drive device 26 is driven, and a plurality of rollers in the cutter spoke 4 are connected via the coupling mechanism 25. The support members 19 can be simultaneously rotated, and the positions of the plurality of roller cutters 15 can be quickly switched.

Next, another embodiment of the cutter device 3 will be described. 1) Another Embodiment 1 (see FIGS. 7 to 12) As shown in FIGS. 7 and 8, this cutter device 3A includes:
A rotation support mechanism 27 and a roller support member 28 are provided, and the roller support member 28
A special connecting chute 4b2 (corresponding to a roller mounting frame) connected between a pair of side plates 4b1 projecting from the rear surface of the face plate S is provided in a plurality of rows along the radial direction of the face plate S. In addition, it is provided on the front end side of the exclusive connection chute 4b2 via a rotation support mechanism 27. In addition, the side plate 4b
1 and the dedicated connection chute 4b2 form sealed passages W1 and W2, respectively, and one passage W1 is connected to the other passage W1.
2 so that the worker can move freely in this passage W1. The roller cutter 15 is rotatably supported by a roller supporting member 28, and is supported by the roller supporting member 28 so as to be replaceable from one of the passages W1 by attaching and detaching a detachable lid.

On the back side of the roller cutter 15, there is provided a flow opening H for flowing the excavated earth and sand-like material backward, and a bearing plate 29 corresponding to the rotary seat forming member 20 in FIG. Are fixed at regular intervals along the dedicated connecting chute 4b2 of the face plate S. The roller supporting member 28 has both outer peripheral portions formed into a partial cylindrical surface 28a or a partial spherical surface. It is decorated in. A pair of shaft portions 28b are provided on both sides of the partial cylindrical surface 28a of the roller supporting member 28 in a direction perpendicular to the longitudinal direction of the dedicated connecting chute 4b2 and in the direction of the axis parallel to the face plate S. Are rotatably supported by both bearing plates 29. That is, the roller support member 28 is
It is rotatable by a rotation support mechanism 27 having a partial spherical surface 28a and a pair of shaft portions 28b.

The bearing plate 29 is provided with seal members 29a and 29b for preventing excavated earth and sand from flowing into the passages W1 and W2.
Are interposed between the roller support member 28 and the front and rear sides, respectively, and the seal member 29b is interposed between the outer periphery of the shaft portion 28b.

At the excavation position where the roller cutter 15 protrudes from the face plate S (see FIGS. 7 and 8), the protruding amount of the roller cutter 15 from the face plate S becomes larger than the protruding amount of the teeth cutter (not shown) (see FIG. 7). The roller cutter 15 is preceded), so that the roller cutter 15 can be advanced when excavating the rock.

Both ends of the shaft portion 28b are formed as, for example, rectangular engaging portions, and a hydraulic jack (not shown) is connected to the cutter device 3.
The hydraulic jack is provided with a shaft 2
An engaged portion engageable with the engaging portion 8b is provided.
The earth load acting on the roller cutter 15 during excavation is mainly transmitted from the roller support member 28 to the shaft portion 28b, and sequentially transmitted to the hydraulic jack via the engaging portion and the engaged portion,
It is transmitted to the dedicated connecting chute 4b2. Alternatively, a form in which part of the earth load acting on the roller supporting member 28 is transmitted from the shaft portion 28b to the cutter spoke 4 via the bearing plate 29 may be employed.

Of course, when the engaging portion of the shaft portion 28b and the engaged portion of the hydraulic jack are in the engaged state, the roller supporting member 28 cannot rotate, and when not engaged, the roller supporting member 28 rotates. Moveable. In this disengaged state, the roller support members 28 can be individually rotated by operating the engaging portions using the operating tool.

As shown in FIGS. 9 to 12, the 90-degree rotation position of the roller support member 28 is the retracted position of the roller cutter 15, and the roller cutter 15 can be exchanged from one of the passages W1 in this retracted position. It is configured. In the retracted position of the roller cutter 15, the roller support member 2
The partial cylindrical surface 28a and the seal members 29a and 29b of 8 prevent earth and sand and water from entering, and close the flow opening H. Therefore, the roller cutter 15 can be safely and easily replaced from the inside of the passage W1 by removing the water stopping casing 29c (see FIG. 8).

Next, the operation of the above-described cutter device 3A will be described. As shown in FIGS. 7 and 8, when excavating the rock mass, the roller cutter 15 is held at the excavation position, and the engaging portion of the shaft portion 28b and the engaged portion of the hydraulic jack are engaged. . In this state, the roller support member 28 cannot rotate, and the protrusion amount of the roller cutter 15 becomes larger than the protrusion amount of the teeth cutter 17.
Therefore, the roller cutter 15 can precede the excavation of the bedrock portion, so that the cutter device 3 can be rotated by the cutter drive motor 7 and the rocker portion 15 can be suitably excavated by the roller cutter 15.

As shown in FIGS. 9 and 10, when excavating the earth and sand portion, the rotation of the cutter device 3 is temporarily stopped, and the engagement between the engagement portion of the shaft portion 28b and the engaged portion of the hydraulic jack is performed. The state is released, and the roller support member 28 is made rotatable. Subsequently, the engaging portion is operated using the operating tool, and the roller supporting member 2 is operated.
8 is rotated to stop at a position rotated 90 degrees from the above-described excavation position (the retracted position of the roller cutter 15), and the engaging portion and the engaged portion are brought into the engaged state again. By switching the roller cutter 15 to the retracted position, the teeth cutter 17 can be moved ahead when excavating the earth and sand portion. Therefore, the cutter device 3 is rotated by the cutter driving motor 7, and the earth and sand portion is suitably rotated by the teeth cutter 17. Can be excavated.

The roller cutter 15 is appropriately switched between an excavation position and a retreat position (non-excavation position) in accordance with the difference between the bedrock portion and the earth and sand portion, and the cutter device 3 can be rotated to excavate a tunnel. In the position, the roller cutter 15 can be stably held without depending on the thrust of the hydraulic cylinder or the like.

As shown in FIGS. 11 and 12, when the roller cutter 15 is replaced due to wear or loss,
In the retracted position shown in FIGS. 9 and 10, the water stopping casing 29c is removed, the lid 28c of the roller support member 28 is removed, and the roller cutter 15 is replaced from the inside of the passage W1. At the retracted position of the roller cutter 15, the seal members 29a and 29b of the roller support member 28 prevent intrusion of earth and sand or water and close the circulation opening H. Therefore, the roller cutter 15 can be easily and safely replaced without being disturbed by water or earth and sand from within the passage W1. After the replacement of the roller cutter 15, it can be switched to the excavation position by an operation reverse to the above. The other operations and effects are the same as those of the above-described embodiment.

According to the cutter device 3A, when excavating a rock mass, the roller support member 28 is rotated by the rotation support mechanism 27.
By rotating through the roller cutter 15, the roller cutter 15 can be switched to the excavation position protruding from the face plate S, and the rock mass can be appropriately excavated by the roller cutter 15. When excavating earth and sand or using roller cutter 15
At the time of replacement, the excavation of the shield machine 1 is temporarily stopped, and the roller support member 28 is rotated via the rotation support mechanism 27 to switch the roller cutter 15 to the retracted position retracted into the face plate S. In the retracted position of the roller cutter 15, the seal members 29a and 29b of the roller support member 28 prevent the intrusion of soil and water and close the circulation opening H. It can be safely performed from inside the passage W1 without being obstructed. Therefore, construction work such as ground improvement becomes unnecessary, construction costs can be reduced, and accordingly, the construction period can be shortened. As shown in FIGS. 9 to 12 and FIGS. 14 to 16, the roller support members 28 and 31 or the seal wall plate 24 (see FIG. 6) It has a retaining effect for stabilizing the face when excavating earth and sand.

Another Embodiment 2 (see FIGS. 13 to 16) Next, a cutter device 3B according to another embodiment 2 will be described. As shown in FIG. 13, the cutter device 3B includes:
A rotation support mechanism 30 and a roller support member 31 are provided. A plurality of roller support members 31 are provided between the pair of side plates 4b of each of the cutter spokes 4 and at the front end side of the side plates 4b in the longitudinal direction of the cutter spokes 4 via a rotation support mechanism 30. Are rotatably supported by the respective roller support members 31, and are exchangeably supported by attaching and detaching lids (not shown) which are detachable from the roller support members 31. On the rear side of the roller cutter 15, a flow opening H for flowing the excavated earth and sand-like material backward is provided.

A pair of rotary seat forming members 32 are respectively provided on a pair of side plates 4b, 4b of each cutter spoke 4, and a roller support member 31 having a convex partial spherical shape or a partial cylindrical surface shape is provided. Are formed on opposing surfaces of the rotary seat forming member 32. A water stop casing 32a is installed between the upper and lower rotary seat forming members 32, and the passages W1, W
Form 2

A part of the rotary seat forming member 32 is formed in a concave partial spherical surface or a partial cylindrical surface, and has a convex partial spherical shape (or a partial cylindrical shape) rotatably engaged with the surface.
Are formed at both side positions of the roller support member 31. That is, the rotation support mechanism 30 has the engagement portion 31a, and the roller support member 31 is
To be rotatable. Rotating seat forming member 32
Are provided with seal members 31b and 31c at the front and rear sides for preventing excavated earth and sand from flowing into the passages W1 and W2.

The roller cutter 15 is used for the cutter spoke 4
At the excavation position projecting from the front end of the roller cutter 15 (see FIG. 13), the protrusion amount δ5 of the roller cutter 15 from the cutter spoke 4 becomes larger than the protrusion amount δ6 of the teeth cutter 17 (that is, the roller cutter 15 precedes). Therefore, the roller cutter 15 can precede the excavation of the bedrock.

In order to rotate the roller support member 31,
A connection mechanism and a rotation drive device (both not shown) similar to those of the above-described embodiment are provided for each cutter spoke 4, and a pair of hydraulic jacks is used to connect one and the other of the shaft members of the connection mechanism (ie, the cutter spokes). 4 Near both ends in the length direction)
And transmits the soil load from the roller support member 31 to the pair of hydraulic jacks and from the hydraulic jack to the cutter spokes 4. The coupling mechanism and the hydraulic jack have the same engaging portion and engaged portion as in the first embodiment, and the roller support member 31 cannot rotate when the engaging portion and the engaged portion are in the engaged state. And the roller support member 31 is rotatable when in the disengaged state. Of course, it is also possible to rotate the roller support member 31 by operating the engaging portion using an operating tool or the like in the non-engaged state without employing the rotation driving device.

The 90-degree rotation position (see FIGS. 14 and 15) of the roller support member 31 is a retreat position of the roller cutter 15, and the roller cutter 15 has one (rotation side) of water stoppage in this retreat position. By removing the casing 32a from the rotary seat forming member 32, it can be replaced. At the retracted position of the roller cutter 15, the partial spherical surface (or partial cylindrical surface) of the roller support member 31 and the seal members 31b and 31c prevent intrusion of earth and sand or water, and close the flow opening H. Therefore, the replacement of the roller cutter 15 can be performed safely and easily from within the cutter spoke 4.

A seal wall plate 33 connects the other water-stop casing 32 a to the bottom of the roller support member 31 and at the 90-degree rotation position of the roller support member 31 to form the rotary seat forming member 32.
The seal wall plate 33 is detachably provided by removing from the cutter spokes 4 at the 180-degree rotation position (see FIG. 16) of the roller support member 31 from the excavation position.
Is formed so as to be substantially flush with the front end. Therefore, the tooth cutter 17 can precede when excavating the earth and sand portion.

Next, the operation of the cutter device 3B described above will be described. As shown in FIG. 13, when excavating a rock part, the roller cutter 15 is held at the excavation position, and the engaging part and the engaged part are brought into the engaged state. In this state, the roller supporting member 31 cannot rotate, and the protrusion amount δ5 of the roller cutter 15 becomes larger than the protrusion amount δ6 of the teeth cutter 17. Therefore, the roller cutter 15 can precede the excavation of the bedrock portion, so that the cutter device 3 can be rotated by the cutter drive motor 7 and the rocker portion 15 can be suitably excavated by the roller cutter 15.

As shown in FIGS. 16 and 17, during excavation of the earth and sand portion, the rotation of the cutter device 3 is temporarily stopped, the engaged state of the engaging portion and the engaged portion is released, and the roller support is released. The member 31 is made rotatable. Subsequently, the rotation driving device is driven to move the roller support member 31 from the excavation position described above to 9 degrees.
Stop at the position rotated 0 degrees. The other casing 32a for waterproofing is removed from the rotating seat forming member 32, and thereafter,
The seal wall plate 33 is fixed to the roller support member 31 (FIG. 1).
5). When the seal wall plate 33 is fixed (or removed), the partial spherical surface (or partial cylindrical surface) of the roller support member 31 and the seal members 31b and 31c prevent earth and sand and water from entering, and close the flow opening H. . Therefore,
The attachment / detachment of the seal wall plate 33 can be easily and safely performed without being disturbed by water or earth and sand from within the cutter spokes 4.

After the other water-stop casing 32a is again fixed to the rotary seat forming member 32, the rotary drive device is driven to rotate the roller support member 31 by 180 degrees from the above-described excavation position (see FIG. 16). ) To bring the engaging portion and the engaged portion into an engaged state. The roller support member 31 is
By switching to the position rotated by 80 degrees, the teeth cutter 17 can be moved ahead when excavating the earth and sand portion. Therefore, the cutter device 3 is rotated by the cutter drive motor 7, and the earth and sand portion is suitably rotated by the teeth cutter 17. Can be drilled.

As shown in FIG. 14, the roller cutter 15
At the time of replacement due to wear or loss of the roller, at the 90-degree rotation position of the roller support member 31, one of the water stopping casings 32a is removed from the rotary seat forming member 32, and the cover of the roller support member 31 is removed. Cutter 1
5 is replaced from within the cutter spokes 4. At the retracted position of the roller cutter 15, the partial spherical surface (or partial cylindrical surface) of the roller support member 31 and the seal members 31b, 3
1c prevents earth and sand and water from entering, and closes the flow opening H. Therefore, the roller cutter 15 can be easily and safely replaced without being disturbed by water, earth and sand from inside the cutter spoke 4. Other operations and effects substantially similar to those of the above-described embodiment can be obtained.

[0068]

According to the first aspect of the present invention, at the time of excavation of the rock, the roller cutter can be switched to the excavation position by rotating the roller support member via the rotation support mechanism. With this roller cutter, the rock portion can be suitably excavated. When excavating the earth and sand portion or replacing the roller cutter, the excavation of the shield machine is temporarily stopped, and the roller cutter is switched to the retracted position by rotating the roller support member via the rotation support mechanism. Therefore, the roller cutter does not hinder earth and sand excavation and can suppress uneven wear, and the roller cutter can be safely replaced from within the roller mounting frame.

According to the second aspect of the present invention, since the roller cutter at the retracted position is configured to be inspectable and replaceable, the roller cutter and the roller cutter are rotated via the rotation support mechanism, so that the roller cutter is rotated. Can be switched to the retracted position, and the roller cutter can be safely inspected and replaced from within the roller mounting frame at the retracted position. The other effects are the same as those of the first aspect. According to the third aspect of the present invention, the rotary seat forming member is provided with the seal member for sealing the inner surface side, and the seal members are the roller supporting member and the rotary seat forming member (roller mounting frame).
Is sealed, so that the inflow of earth and sand or the like passing through the gap is prevented, and the roller supporting member can rotate smoothly. The other effects are the same as those of the first aspect.

According to the fourth aspect of the present invention, the rotary support mechanism is fixedly provided on the roller mounting frame and includes the roller support member having a partial spherical surface or a partial cylindrical surface. The roller support member can be stably held in any of the retracted position and the retracted position. Therefore, the roller cutter can be stably held in each switching position without depending on the thrust of the hydraulic cylinder or the like. Can be. In addition, the same effect as any one of the first to third aspects is obtained.

According to the fifth aspect of the present invention, since the roller cutter can be switched between the excavation position and the retreat position without interfering with the partial spherical surface or the partial cylindrical surface of the rotary seat, the position of the roller cutter can be switched smoothly. It can be performed quickly. The other effects are the same as those of the fourth aspect.
According to the sixth aspect of the present invention, since the reaction force support member for transmitting the load at the time of excavation acting on the roller support member from the roller support member to the rotary seat forming member is provided, it acts on the roller cutter at the time of excavation. The earth load is transmitted to the roller support member, transmitted from the roller support member to the reaction force support member, and transmitted from the reaction force support member to the roller mounting frame via the rotary seat forming member. Therefore, the roller supporting force for supporting the roller cutter is stably and reliably secured. The other effects are the same as those of the fifth aspect.

According to the seventh aspect of the present invention, since the roller support member is provided with the operation section for rotating the roller support member manually or by the rotation drive means, the operation section is provided from within the roller mounting frame. The roller support member can be rotated manually or operated by a rotation drive unit. Therefore, the position of the roller cutter can be switched safely and easily. In addition, the same effect as any one of the first to third aspects is obtained.

According to the eighth aspect of the present invention, there is provided a connecting mechanism for interlocking and linking a plurality of roller supporting members for a plurality of roller cutters in order to synchronously rotate and drive the plurality of roller supporting members. And a rotation drive means capable of rotating a plurality of roller support members is provided, so that the excavation of the shield machine is temporarily stopped, the rotation drive means is driven, and the inside of the roller mounting frame is connected via the coupling mechanism. The plurality of roller supporting members can be simultaneously rotated, and the position of the plurality of roller cutters can be quickly switched. In addition, the same effect as any one of the first to third aspects is obtained.

According to the ninth aspect of the present invention, a flow opening is provided on the back side of the roller cutter to allow the excavated earth and sand to flow backward.
By rotating the roller support member and the roller cutter via the rotation support mechanism, the roller cutter can be switched to the excavation position, and the rock cutter can be appropriately excavated by the roller cutter. At the excavation position, the excavated sediment flows backward from the flow opening. When excavating the earth and sand portion or replacing the roller cutter, once the excavation of the shield excavator is stopped, and the roller support member and the roller cutter are rotated via the rotation support mechanism, so that the roller cutter is in the retracted position. Switching, the roller support member can close the flow opening, therefore, the roller cutter does not hinder the excavation of earth and sand, uneven wear can be suppressed, and replacement of the roller cutter is hindered by earth and sand or water It can be performed safely from within the roller mounting frame. In addition, the same effect as any one of the first to third aspects is obtained.

According to the tenth aspect of the present invention, a waterproof casing for preventing water and earth and sand is detachably protruded from the back surface of the face plate, and the roller cutter can be inspected and replaced by detaching the waterproof casing. By rotating the roller support member and the roller cutter via the rotation support mechanism, the roller cutter is switched to the retracted position, the roller support member closes the flow opening, and in this state, water is stopped. By attaching and detaching the casing, inspection and replacement of the roller cutter can be performed safely from within the roller mounting frame without being hindered by earth and sand or water. The other effects are the same as those of the ninth aspect.

[0076]

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part of a shield machine according to an embodiment of the present invention.

FIG. 2 is a front view of a cutter device of the shield machine.

FIG. 3 is a longitudinal sectional view of a main part of a cutter device for a shield machine.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a view corresponding to FIG. 3 of the cutter device (roller cutter retracted position).

FIG. 6 is a view of a main part of FIG. 5 in a state where the roller cutter is replaced.

FIG. 7 is a longitudinal sectional view of a main part of a cutter device according to another embodiment 1.

FIG. 8 is a sectional view taken along line BB of FIG. 8;

9 is a longitudinal sectional view of a main part of the cutter device (retracted roller cutter position) of FIG. 7;

FIG. 10 is a sectional view taken along line CC of FIG. 10;

11 is a view of a main part of FIG. 9 in a state where the roller cutter of the cutter device of FIG. 7 is replaced.

FIG. 12 is a sectional view taken along line DD of FIG. 11;

FIG. 13 is a longitudinal sectional view of a main part of a cutter device of another embodiment 2.

14 is a longitudinal sectional view of a main part of the cutter device (roller cutter retracting position) of FIG.

FIG. 15 is a longitudinal sectional view of a main part of the cutter device (with the roller cutter removed) of FIG. 13;

FIG. 16 is a longitudinal sectional view of a main part of the cutter device (roller support member inverted state) of FIG. 13;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield excavator 3, 3A, 3B Cutter device 4 Cutter spoke 4b2 Dedicated connection chute 15 Roller cutter 18 Rotation support mechanism 19 Roller support member 19c Hex nut 20 Rotation seat forming member 20a Rotation seat 22 Reaction force support member 25 Connection mechanism 26 Rotation drive device 27 Rotation support mechanism 28 Roller support member 28a Partial spherical surface 28b Shaft portions 29a, 29b Seal member H Flow opening 30 Rotation support mechanism 31 Roller support member 32 Rotation seat forming member 32a Waterproof casing

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 13, 1999 (1999.8.1)
3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

In the state shown in FIG. 3, the roller cutter 1
5 is the excavation position protruding from the front end of the cutter spoke 4, the protrusion amount δ1 of the roller cutter 15 from the cutter spoke 4 becomes larger than the protrusion amount δ2 of the teeth cutter 17, and the roller cutter 15 is ahead of the teeth cutter 17. Then, excavation of the rock mass can be performed by the roller cutter 15. Incidentally, when the drilling position, roller shaft 15a is located eccentrically to the front than the center 20 c of the rotating seat 20a.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0065

[Correction method] Change

[Correction contents]

As shown in FIGS. 15 and 16 , during excavation of the earth and sand portion, the rotation of the cutter device 3 is temporarily stopped, and the engagement between the engagement portion and the engaged portion is released. The roller support member 31 is made rotatable. Subsequently, the rotation driving device is driven to move the roller support member 31 from the excavation position described above to 9 degrees.
Stop at the position rotated 0 degrees. The other casing 32a for waterproofing is removed from the rotating seat forming member 32, and thereafter,
The seal wall plate 33 is fixed to the roller support member 31 (FIG. 1).
5). When the seal wall plate 33 is fixed (or removed), the partial spherical surface (or partial cylindrical surface) of the roller support member 31 and the seal members 31b and 31c prevent earth and sand and water from entering, and close the flow opening H. . Therefore,
The attachment / detachment of the seal wall plate 33 can be easily and safely performed without being disturbed by water or earth and sand from within the cutter spokes 4.

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3 ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 12, 1999 (1999.11.
12)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Cutter device for shield machine

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter for a shield excavator used for excavating a tunnel, and more particularly to a rotary cutter installed on a front surface of the shield excavator. The present invention relates to a shield machine for a cutter which is suitable for both excavations.

[0002]

2. Description of the Related Art A shield excavator is widely used as a drilling device for constructing various shield tunnels (water and sewage tunnels, subway tunnels, communication cable tunnels, tunnels for common ditch, etc.) by a shield method. ing. 2. Description of the Related Art In recent years, a rotary cutter device (also called a cutter head) has been provided in front of an excavator body as a shield excavator for rock, hard ground, and earth and sand. A shield machine having a plurality of roller cutters and a plurality of teeth cutters is employed. Each roller cutter excavates rocks, and each tooth cutter excavates earth and sand. A dome-type or disk-type cutter device is used depending on conditions such as the amount of gravel, the diameter of gravel, the strength of gravel, and the quality of rock. Note that these shield machines are also provided with an overcutter device (also called a copy cutter device) for excavation on the outer peripheral side of the cutter device.

[0003] The shield machine is configured such that the amount of protrusion of the roller cutter from the cutter spokes is greater than the amount of protrusion of the teeth cutter (that is, the roller cutter precedes), thereby making excavation of the rock mass suitable. Can be done. Of course, at the time of excavation of the rock, if the protrusion amount of the tooth cutter becomes larger than the protrusion amount of the roller cutter, the tooth cutter is broken. On the other hand, at the time of excavation of the earth and sand portion, the advance of the roller cutter not only hinders the earth and sand excavation but also causes uneven wear of the roller cutter.

[0004] For example, in a shield machine described in Japanese Utility Model Laid-Open No. 5-27197, there is described a cutter device capable of at least arbitrarily adjusting a projection amount of a roller cutter. This cutter device includes a plurality of hydraulic cylinders, and adjusts the amount of protrusion of the roller cutter arbitrarily by adjusting the rod portion of the hydraulic cylinder so as to extend and retract.

[0005] In order for this cutter device to function, the rod portion of the hydraulic cylinder is protruded and the roller cutter is switched to the excavation position (the roller cutter precedes the tooth cutter). In order to maintain the roller cutter at the excavation position, the thrust of the hydraulic cylinder must always be equal to or greater than a predetermined value against external force acting on the roller cutter.

[0006]

As described above, in the cutter device for a shield excavator, especially when excavating a rock mass, the roller cutter must be maintained at a position preceding the tooth cutter. Therefore, it is necessary to always maintain a state in which a constant hydraulic pressure is applied to the hydraulic cylinder. For example, the hydraulic supply system that supplies hydraulic pressure to the hydraulic cylinder body (including the rod section) or the hydraulic cylinder is caused by muddy water or mud. If it is damaged, the hydraulic cylinder cannot maintain a constant hydraulic pressure, and the protrusion of the roller cutter cannot be adjusted. Further, when the wear of the roller cutter exceeds a predetermined value and the excavating ability is reduced or the roller cutter is damaged for some reason, the roller cutter cannot be replaced because it is under the soil water pressure of the face.

SUMMARY OF THE INVENTION It is an object of the present invention to stabilize and switch a digging position and a non-digging position of a roller cutter in a shield machine, and to easily and safely replace the roller cutter. And to reduce the construction cost and shorten the construction period.

[0008]

According to a first aspect of the present invention, there is provided a cutter machine for a shield machine, comprising: a cutter spoke;
In the shield machine cutter device including a plurality of rollers cutter attached to the front end of the coater spoke, a roller support member for rotatably respectively supporting said roller cutter, said roller supporting member is engaged rotatably You
A rotary support mechanism that includes a rotary seat forming member having a rotary seat formed therein and rotatably supports each roller support member on a cutter spoke ; and seals an inner surface side of the rotary seat forming member.
A sealing member, and water into the cutter spokes.
Rotating seat in water-stop casing to prevent inflow of soil and sand
Leave mounted on member, by the roller support member and the roller cutter 90 degrees or 180 degrees rotated via the rotation support mechanism, switchably constitute roller cutter and drilling position and the retracted position, the retracted Switched to position
Remove the water blocking casing and
It is characterized in that it can be replaced from the inside of the spoke .

At the time of excavation of the rock mass, the roller cutter can be switched to the excavation position by rotating the roller support member and the roller cutter via the rotation support mechanism.
With this roller cutter, the rock portion can be suitably excavated. When excavating the earth and sand portion or replacing the roller cutter, once the excavation of the shield excavator is stopped, and the roller support member and the roller cutter are rotated via the rotation support mechanism, so that the roller cutter is in the retracted position. The roller cutter can be switched, so that the roller cutter does not hinder earth and sand excavation, uneven wear can be suppressed, and the roller cutter can be replaced safely from the inside of the cutter spoke . And, the sealing member is a roller supporting portion.
The space between the material and the rotating seat forming member is sealed.
And prevent the inflow of soil, etc.
Rotate.

[0010] shield machine cutter device according to claim 2 is the invention of claim 1, work on the roller support member
Rotation seat is formed from roller support member during excavation load
A reaction force support member for transmitting the force to the member is provided . Soil acting on the roller cutter during excavation
The load is transmitted to the roller support member and
Rotational seat forming part transmitted from reaction force support member to reaction force support member
Transmitted to the material. Therefore, the supporting force of the roller cutter is
It is transmitted stably and reliably via the reaction force support member.
Shield machine cutter apparatus of claim 3, claim 1
Or in the invention of 2 above, the roller supporting member is manually
Or, an operation section for rotating by operating the rotation drive means is provided.
It is characterized in that the digits. The operation unit is cutters
Operated manually or with a rotary drive from the inside of the pork
Thus, the roller supporting member can be rotated. Therefore,
Safe and easy switching of roller cutter position
Can be.

[0011] shield machine cutter device according to claim 4, in the invention of claim 1, wherein the Ca
Roller rollers arranged in the length direction of the
Rotary drive of multiple roller support members for the printer
Connection mechanism that interlocks and connects these roller support members
And a plurality of roller support members are rotated via the connecting mechanism.
And a rotatable driving means are provided . Once the excavation of the shield machine has been stopped,
Driving the step, a plurality of roller support members via a coupling mechanism
Can be rotated simultaneously, and multiple roller cutters
Can be quickly switched.

According to a fifth aspect of the present invention, there is provided a cutter machine for a shield machine according to any one of the first to third aspects .
On the back side of the cutter,
It is characterized in that a flow opening for flowing is provided . When excavating rock mass, the roller support
And the roller cutter through the rotation support mechanism.
With this, the roller cutter can be switched to the excavation position.
The rock cutter is used to excavate the rock
Can be This roller cutter is in the excavation position
The excavated sediment flows backward from the flow opening.
You. When excavating earth and sand or replacing roller cutters
First, stop the excavation of the shield machine and
Rotate the support member and roller cutter via the rotation support mechanism
Switch the roller cutter to the retracted position,
Roller support member can close the flow opening,
Therefore, the roller cutter does not hinder earth and sand excavation and uneven wear
Can also reduce the roller cutter replacement with earth and water
From the inside of the cutter spokes without interruption
Everything can be done.

[0013] shield machine cutter device according to claim 6 is the invention of claim 5, waterproofing to prevent water and sediment
Casing is detachably mounted on the back of the face plate.
Inspect the roller cutter by attaching and detaching the water stop casing.
It is characterized by being configured to be exchangeable . Low
Rotating the roller support member and roller cutter via the rotation support mechanism.
Moving the roller cutter to the retracted position,
The roller support member closes the flow opening, and in this state, water stops.
Inspecting the roller cutter by removing and attaching the casing for
・ Cutters can be replaced without being interrupted by earth and sand.
Can be done safely from the inside of the Other claims
The same operation as that of No. 5 is achieved.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. First, the schematic structure and operation of the shield machine will be described, and then the cutter device will be described. As shown in FIG. 1 and FIG.
The drilling machine 1 has a body member 2 as a skin plate, and a cutter device (cutter head) 3
It is arranged on the front end side of. The cutter device 3 includes a plurality of radially arranged cutter spokes 4 (corresponding to a roller mounting frame) and a plurality of connecting frames 10a arranged at appropriate circumferential intervals on the rear end side of the cutter spokes 4. It has an annular cutter drum 5 integrally connected through the same. The cutter device 3 includes a cutter rotation drive mechanism (a plurality of cutter drive motors 7, a pinion gear 7).
a, a ring gear 8 and a slewing bearing 8a).

A chamber 9 is formed on the rear side of the cutter device 3 inside the body member 2, and an access passage forming wall 10 for forming an access passage through which an operator can enter is provided on the rear side of the cutter device 3. The access passage forming wall 10 includes the connecting frame 10a (in which an operator can move), a box forming wall 10b that forms a working space behind the cutter spokes 4, and the like.

A partition structure 11 for supporting the cutter rotation drive mechanism 6 and mounting the cutter drum 5 is provided inside the body member 2 behind the chamber 9. The partition structure 11 includes a central wall 11a and an inner cylindrical wall 11
b, annular walls 11c, 11d, 11f and outer cylinder wall 11e
And The cutter drum 5 is rotatably mounted in an annular space between the inner cylindrical wall 11b and the outer cylindrical wall 11e, and a plurality of seal members 12a and bearings 12b are mounted on both inner and outer sides of the cutter drum 5.

The plurality of shield jacks 13 are for generating thrusts for excavation, and are arranged rearward, respectively, and their jack bodies 13a are fixed inside the body member 2. These shield jacks 13 take a reaction force on segments (not shown) already covered on the inner surface of the tunnel to generate excavating thrust. Further, inside the body member 2, earth discharging equipment, an erector device (all not shown) and the like are provided.

As shown in FIG. 2, the cutter device 3 has a ring member 3A having an outer diameter substantially equal to that of the body member 2 and a plurality of ring members connected to the ring member 3A. It has a cutter spoke 4, a plurality of roller cutters 15 provided on each of the cutter spokes 4, and a plurality of overcutter devices 16 provided on the outer peripheral side of the cutter device 3. Roller cutter 15
Each is a cutter spoke 4 or a cutter face plate 4c
The roller cutters 15 are rotatably supported by
Arranged to be different radial positions from each other, the radial position is set so as to be able to excavate uniformly on the excavation surface,
The roller cutters 15 are particularly applied for excavating a rock mass. As shown in FIG. 3, a plurality of tooth cutters 17 are mounted on the front surface of the side plate 4b of the cutter spoke 4, and the tooth cutters 17 are particularly applied to excavate earth and sand.

Next, the operation of the shield machine described above will be described. At the time of normal excavation in which a tunnel is dug straight, a plurality of shield jacks 1 are used.
The cutter driving motor 7 generates the thrust for excavation at 3.
Is driven, the pinion gear 7a rotates, the ring gear 8 rotates, and the cutter drum 5 rotates. As a result, since a large number of roller cutters 15 or a large number of teeth cutters 17 excavate the face while rotating, a tunnel having a circular cross section is excavated. The excavation is interrupted every time a predetermined one ring is excavated, and a segment is assembled to the latest excavated one ring portion on the inner surface of the tunnel using an erector device or the like, and thereafter the excavation is resumed.

Next, the cutter device 3 will be described in detail. As shown in FIGS. 3 and 4, in order to rotatably support each roller cutter 15 of the cutter device 3 and switch between the excavation position and the retreat position, a rotation support mechanism 18 is provided.
A roller support member 19 is provided. One or more rows of roller support members 19 are provided in the longitudinal direction of the cutter spoke 4 between the pair of side plates 4b of each cutter spoke 4 and at the front end side of the side plate 4b via a rotation support mechanism 18. The roller cutter 15 is provided with the respective roller support members 19.
The cover 19a is rotatably supported by the roller support member 19 and is exchangeably supported by attaching and detaching a lid 19a detachably attached to the roller support member 19.

The rotary seat forming member 20, side plates 4b of the pair of cutters spoke 4, respectively are integrally fixed so as to face each other in 4b, versus countercurrent <br/> surface side of both the rotary seat forming member 20 Partially spherical (concave) or partially cylindrical rotating seat 2
0a are respectively formed. Partially spherical (convex) such that both side portions of the roller support member 19 are rotatably engaged with the pair of rotary seats 20a between the two rotary seats 20a.
Or it is formed in a partial cylindrical surface shape. That is, the rotation support mechanism 18 is mainly composed of the rotary seat 20a and the partial spherical surface or the partial cylindrical surface of the roller support member 19, and one line is provided between the rotary seat 20a and the partial spherical surface of the roller support member 19. The above-mentioned (two rows in this figure) seal members 21 are mounted, and the roller support member 19 that rotatably supports the roller cutter 15 is rotatable by the rotation support mechanism 18.

The seal member 21 is formed of the rotating seat forming member 2.
0, and are respectively accommodated in two seal grooves 19b formed in parallel with each other and formed on both partial spherical surfaces or both cylindrical surfaces and both end surfaces, between the roller support member 19 and the rotary seat forming member 20. Seal the gap between the two. Roller support member 19 and rotary seat 2
Grease supply path 2 for supplying grease between the first grease
0b and the grease filling portion are a pair of rotary seat forming members 20.
And the roller supporting member 19 is configured to rotate smoothly. Although two seal grooves 19b are provided above and below the rotary seat forming member 20, either one of the upper and lower seal grooves has no functional problem.

In the state shown in FIG. 3, the roller cutter 1
5 is the excavation position protruding from the front end of the cutter spoke 4, the protrusion amount δ1 of the roller cutter 15 from the cutter spoke 4 becomes larger than the protrusion amount δ2 of the teeth cutter 17, and the roller cutter 15 is ahead of the teeth cutter 17. Then, excavation of the rock mass can be performed by the roller cutter 15. At this excavation position, the roller shaft 15a is positioned eccentrically forward of the center 20c of the rotary seat 20a.

In a state where the roller cutter 15 is held at the excavation position for excavating the rock, the reaction force support member 22 is hung over the rear ends of the pair of rotary seat forming members 20 and is removably bolted. . The earth load acting on the roller cutter 15 during excavation is transmitted to the roller support member 19 and transmitted from the roller support member 19 to the reaction force support member 22 via the seal wall plate 24 provided at the bottom of the roller support member 19, The earth load is transmitted from the reaction force support member 22 to the cutter spoke 4 via the rotary seat forming member 20. The seal wall plate 24 prevents inflow of earth and sand into the inside of the cutter spoke 4. In a state where the reaction force support member 22 is fixed, the roller support member 19 cannot rotate.

As shown in FIG. 5, in order to switch the roller cutter 15 from the excavation position to the retracted position, the water stopping casing 23 is detachably bolted to the same attaching / detaching position as the reaction force supporting member 22. The casing 23 prevents water or earth and sand from entering the inside of the cutter spokes 4, and in this water-stop state, the roller support member 19 can rotate. That is, the water stopping casing 23 is provided with the roller supporting member 1.
9 and the roller seat 15 so as not to interfere with the roller cutter 15.
It is formed on or outside a virtual spherical surface that is continuous with the partial spherical surface of Oa.

FIG. 5 shows a state in which the roller cutter 15 is switched to the retracted position by rotating the roller support member 19 and the roller cutter 15 through 180 degrees via the rotary seat 20a. When the roller cutter 15 is at the retracted position, the seal wall plate 24 is formed so as to be substantially flush with the front end of the rotary seat forming member 20, so that the tooth cutter 17 can precede when excavating the earth and sand portion. When the roller cutter 15 is switched to the retracted position, the roller cutter 15 is configured to be replaceable from within the cutter spoke 4 (see FIG. 6).

As shown in FIG. 4, the roller support member 19 and the roller cutter 15
Hexagon nut 19c for rotating the shaft (corresponding to the operation unit)
By operating the hexagon nut 19c manually or by a drive source (not shown) from within the cutter spoke 4, the roller support member 19 and the roller cutter 15 are individually rotated and retracted from the excavation position. Position or vice versa.

As shown in FIG. 4, each cutter spoke 4
When the plurality of roller support members 19 are simultaneously rotated synchronously, the connecting mechanism 25 and the rotation drive device 26 capable of rotating the plurality of roller support members 19 are provided for each cutter spoke 4. Provided. The connection mechanism 25 connects the shaft members 25a protruding from both the roller support members 19 on both sides toward the length direction of the cutter spoke 4 and the shaft members 25a of the adjacent roller support members 19 respectively. And a coupling 25b. In addition, the shaft-like member 2
The axis center of 5a coincides with the center of rotation of the roller support member 19. Note that the rotation drive device 26 may be provided for a part of the roller cutters 15 in the cutter spokes 4 in one row.

The rotation drive device 26 has a worm wheel 26a externally mounted on a part of the shaft member 25a, a worm gear 26b meshing with the worm wheel 26a, and a drive motor 26c for rotating the worm gear 26b. . The drive motor 26c is fixed to, for example, the side plate 4b of the cutter spoke 4, and driven by the drive motor 26c, the worm gear 26b rotates, and the worm wheel 2
6a rotates, the shaft-like member 25a rotates, and the plurality of roller support members 19 and roller cutters 15 in one row of cutter spokes 4 simultaneously rotate to switch from the excavation position to the retreat position or vice versa. Can be

Next, the operation of the cutter device 3 will be described. As shown in FIG. 3, when excavating the rock, the roller cutter 15 is held at the excavation position, and the reaction force support member 22 is fixed to the rotary seat forming member 20. In this state, the roller support member 19 cannot rotate, and the protrusion amount δ1 of the roller cutter 15 becomes larger than the protrusion amount δ2 of the teeth cutter 17. Therefore, when excavating the bedrock, the roller cutter 15 is moved ahead, the cutter device 3 is rotated by the cutter drive motor 7, and the bedrock can be efficiently excavated by the roller cutter 15.

As shown in FIGS. 4 and 5, when excavating the earth and sand layer other than the bedrock portion, the rotation of the cutter device 3 is temporarily stopped, the reaction force supporting member 22 is removed, and instead, The casing 23 is fixed to the rotating seat forming member 20. In this state, the roller support member 19 and the roller cutter 15 are rotatable, and the roller support member 19 and the roller cutter 15 are individually rotated by manually operating the hex nut 19c from within the cutter spoke 4. To switch from the excavation position to the evacuation position. When the plurality of roller support members 19 are simultaneously rotated in synchronization,
By driving the drive motor 26c of the rotary drive device 26 to rotate the worm gear 26b, rotate the worm wheel 26a, rotate the shaft member 25a, and simultaneously drive the plurality of roller support members 19 in the cutter spokes 4 in each row. To switch all the roller cutters 15 in all the cutter spokes 4 to the retracted position.

By switching the roller cutter 15 to the retracted position in this way, a large number of teeth cutters 17 can precede the excavation of the earth and sand portion, and the cutter device 3 is rotated by the cutter drive motor 7 so that the large number of teeth cutters are rotated. 17 enables efficient excavation. As described above, the tunnel can be excavated by appropriately switching the roller cutter 15 between the excavation position and the retreat position (non-excavation position) according to the properties of the ground, and the roller cutter 15 can be thrust by a hydraulic cylinder or the like at each position. , And can be stably held without depending on.

At the time of replacement due to wear or breakage of the roller cutter 15, the cover 19a of the roller support member 19 is removed with the water repelling position shown in FIG. As shown, the roller cutter 15 is replaced from within the cutter spoke 4. At this time, the worker can connect the connection frame 1 to the access passage forming wall 10.
0a and the inside of the box forming wall 10b to approach the cutter spoke 4 for replacement. In this manner, the roller cutter 15 can be easily and safely replaced from the inside of the cutter spokes 4 without being disturbed by water or earth and sand. Therefore, construction such as ground improvement is not required, and the roller cutter 15 can be safely and quickly replaced.

According to the cutter device 3 described above, at the time of excavation of the bedrock, the roller cutter 15 is rotated from the front end of the cutter spoke 4 by rotating the roller support member 19 via the rotation support mechanism 18. The excavation position can also be switched to a protruding excavation position, and the rock cutter 15 can be appropriately excavated by the roller cutter 15. When excavating the soil or when replacing the roller cutter 15,
Once the excavation of the cutter device 3 is stopped, the roller support member 1
By rotating the roller cutter 9 via the rotation support mechanism 18, the roller cutter 15 can be switched to the retracted position retracted into the cutter spoke 4, and therefore, the roller cutter 1 can be switched.
The roller 5 does not hinder earth and sand excavation and can suppress uneven wear, so that the roller cutter 15 can be safely replaced from within the cutter spoke 4.

[0035] The rotary seat formation member 20, the seal member 21 for sealing the inner surface side is arranged, the gap between the roller support member 19 by the seal member 21 and the rotating seat forming member 20 To prevent the inflow of soil and the like, and the roller support member 19 rotates smoothly. Since the roller support member 19 is rotatably supported by a partially spherical or partially cylindrical rotating seat 20a fixedly provided on the cutter spoke 4, any one of the excavation position and the retreat position of the roller cutter 15 is provided. The roller support member 19 can also be stably held at the position, so that the roller cutter 15 can be stably held at each switching position without depending on the thrust of the hydraulic cylinder or the like.

Since the roller cutter 15 can be switched between the excavation position and the retracted position without interfering with the partial spherical surface or the partial cylindrical surface of the rotary seat 20a, the position of the roller cutter 15 can be switched smoothly and quickly. Can be.

The earth load exerted on the roller supporting member 19 during excavation is transferred from the roller supporting member 19 to the rotary seat forming member 2.
0, the earth load acting on the roller cutter 15 during excavation is transmitted to the roller support member 19 and transmitted from the roller support member 19 to the reaction force support member 22 so that the reaction force is transmitted. The power is transmitted from the support member 22 to the cutter spoke 4 via the rotary seat forming member 20. Therefore, the roller supporting force for supporting the roller cutter 15 is stably and reliably secured.

Since the hexagon nut 19c for manually operating and rotating the roller supporting member 19 is provided, the hexagon nut 19c is operated from within the cutter spoke 4 to rotate the roller supporting member 19 and the roller cutter 15. Can move. Therefore, the position of the roller cutter 15 can be switched safely and easily.

When the plurality of roller support members 19 for the plurality of roller cutters 15 are driven to rotate in synchronization with each other, a connecting mechanism 25 for interlocking the roller support members 19 is connected.
And a plurality of roller support members 1 through the connecting mechanism 25.
9 is provided, the excavation of the shield machine 1 is temporarily stopped, the rotation drive device 26 is driven, and a plurality of rollers in the cutter spoke 4 are connected via the coupling mechanism 25. The support members 19 can be simultaneously rotated, and the positions of the plurality of roller cutters 15 can be quickly switched.

Next, another embodiment of the cutter device 3 will be described. 1) Another Embodiment 1 (see FIGS. 7 to 12) As shown in FIGS. 7 and 8, this cutter device 3A includes:
A rotation support mechanism 27 and a roller support member 28 are provided, and the roller support member 28
A special connecting chute 4b2 (corresponding to a roller mounting frame) connected between a pair of side plates 4b1 projecting from the rear surface of the face plate S is provided in a plurality of rows along the radial direction of the face plate S. In addition, it is provided on the front end side of the exclusive connection chute 4b2 via a rotation support mechanism 27. In addition, the side plate 4b
1 and the dedicated connection chute 4b2 form sealed passages W1 and W2, respectively, and one passage W1 is connected to the other passage W1.
2 so that the worker can move freely in this passage W1. The roller cutter 15 is rotatably supported by a roller supporting member 28, and is supported by the roller supporting member 28 so as to be replaceable from one of the passages W1 by attaching and detaching a detachable lid.

On the back side of the roller cutter 15, there is provided a flow opening H for allowing the excavated earth and sand to flow backward, and a bearing plate 29 corresponding to the rotary seat forming member 20 in FIG. Are fixed at regular intervals along the dedicated connecting chute 4b2 of the face plate S. The roller supporting member 28 has both outer peripheral portions formed into a partial cylindrical surface 28a or a partial spherical surface. It is decorated in. A pair of shaft portions 28b are provided on both sides of the partial cylindrical surface 28a of the roller supporting member 28 in a direction perpendicular to the longitudinal direction of the dedicated connecting chute 4b2 and in the direction of the axis parallel to the face plate S. Are rotatably supported by both bearing plates 29. That is, the roller support member 28 is
It is rotatable by a rotation support mechanism 27 having a partial spherical surface 28a and a pair of shaft portions 28b.

The bearing plate 29 is provided with seal members 29a and 29b for preventing excavated earth and sand from flowing into the passages W1 and W2.
Are interposed between the roller support member 28 and the front and rear sides, respectively, and the seal member 29b is interposed between the outer periphery of the shaft portion 28b.

At the excavation position where the roller cutter 15 protrudes from the face plate S (see FIGS. 7 and 8), the protruding amount of the roller cutter 15 from the face plate S becomes larger than the protruding amount of the teeth cutter (not shown) ( The roller cutter 15 is preceded), so that the roller cutter 15 can be advanced when excavating the rock.

Both ends of the shaft portion 28b are formed as, for example, rectangular engaging portions, and a hydraulic jack (not shown) is connected to the cutter device 3.
The hydraulic jack is provided with a shaft 2
An engaged portion engageable with the engaging portion 8b is provided.
The earth load acting on the roller cutter 15 during excavation is mainly transmitted from the roller support member 28 to the shaft portion 28b, and sequentially transmitted to the hydraulic jack via the engaging portion and the engaged portion,
It is transmitted to the dedicated connecting chute 4b2. Alternatively, a form in which part of the earth load acting on the roller supporting member 28 is transmitted from the shaft portion 28b to the cutter spoke 4 via the bearing plate 29 may be employed.

Of course, when the engaging portion of the shaft portion 28b and the engaged portion of the hydraulic jack are in the engaged state, the roller supporting member 28 cannot rotate, and when not engaged, the roller supporting member 28 rotates. Moveable. In this disengaged state, the roller support members 28 can be individually rotated by operating the engaging portions using the operating tool.

As shown in FIGS. 9 to 12, the 90-degree rotation position of the roller support member 28 is the retracted position of the roller cutter 15, and the roller cutter 15 can be exchanged from one of the passages W1 in this retracted position. It is configured. In the retracted position of the roller cutter 15, the roller support member 2
The partial cylindrical surface 28a and the seal members 29a and 29b of 8 prevent earth and sand and water from entering, and close the flow opening H. Therefore, the roller cutter 15 can be safely and easily replaced from the inside of the passage W1 by removing the water stopping casing 29c (see FIG. 8).

Next, the operation of the above-described cutter device 3A will be described. As shown in FIGS. 7 and 8, when excavating the rock mass, the roller cutter 15 is held at the excavation position, and the engaging portion of the shaft portion 28b and the engaged portion of the hydraulic jack are engaged. . In this state, the roller support member 28 cannot rotate, and the protrusion amount of the roller cutter 15 becomes larger than the protrusion amount of the teeth cutter 17.
Therefore, the roller cutter 15 can precede the excavation of the bedrock portion, so that the cutter device 3 can be rotated by the cutter drive motor 7 and the rocker portion 15 can be suitably excavated by the roller cutter 15.

As shown in FIGS. 9 and 10, when excavating the earth and sand portion, the rotation of the cutter device 3 is temporarily stopped, and the engagement between the engaging portion of the shaft portion 28b and the engaged portion of the hydraulic jack is performed. The state is released, and the roller support member 28 is made rotatable. Subsequently, the engaging portion is operated using the operating tool, and the roller supporting member 2 is operated.
8 is rotated to stop at a position rotated 90 degrees from the above-described excavation position (the retracted position of the roller cutter 15), and the engaging portion and the engaged portion are brought into the engaged state again. By switching the roller cutter 15 to the retracted position, the teeth cutter 17 can be moved ahead when excavating the earth and sand portion. Therefore, the cutter device 3 is rotated by the cutter driving motor 7, and the earth and sand portion is suitably rotated by the teeth cutter 17. Can be excavated.

The roller cutter 15 is appropriately switched between an excavation position and a retreat position (non-excavation position) in accordance with the difference between the bedrock portion and the earth and sand portion, and the cutter device 3 can be rotated to excavate a tunnel. In the position, the roller cutter 15 can be stably held without depending on the thrust of the hydraulic cylinder or the like.

As shown in FIGS. 11 and 12, when the roller cutter 15 is replaced due to wear or loss,
In the retracted position shown in FIGS. 9 and 10, the water stopping casing 29c is removed, the lid 28c of the roller support member 28 is removed, and the roller cutter 15 is replaced from the inside of the passage W1. At the retracted position of the roller cutter 15, the seal members 29a and 29b of the roller support member 28 prevent intrusion of earth and sand or water and close the circulation opening H. Therefore, the roller cutter 15 can be easily and safely replaced without being disturbed by water or earth and sand from within the passage W1. After the replacement of the roller cutter 15, it can be switched to the excavation position by an operation reverse to the above. The other operations and effects are the same as those of the above-described embodiment.

According to the cutter device 3A, when excavating a rock mass, the roller support member 28 is rotated by the rotation support mechanism 27.
By rotating through the roller cutter 15, the roller cutter 15 can be switched to the excavation position protruding from the face plate S, and the rock mass can be appropriately excavated by the roller cutter 15. When excavating earth and sand or using roller cutter 15
At the time of replacement, the excavation of the shield machine 1 is temporarily stopped, and the roller support member 28 is rotated via the rotation support mechanism 27 to switch the roller cutter 15 to the retracted position retracted into the face plate S. In the retracted position of the roller cutter 15, the seal members 29a and 29b of the roller support member 28 prevent the intrusion of soil and water and close the circulation opening H. It can be safely performed from inside the passage W1 without being obstructed. Therefore, construction work such as ground improvement becomes unnecessary, construction costs can be reduced, and accordingly, the construction period can be shortened. As shown in FIGS. 9 to 12 and FIGS. 14 to 16, the roller support members 28 and 31 or the seal wall plate 24 (see FIG. 6) It has a retaining effect for stabilizing the face when excavating earth and sand.

Another Embodiment 2 (see FIGS. 13 to 16) Next, a cutter device 3B according to another embodiment 2 will be described. As shown in FIG. 13, the cutter device 3B includes:
A rotation support mechanism 30 and a roller support member 31 are provided. A plurality of roller support members 31 are provided between the pair of side plates 4b of each of the cutter spokes 4 and at the front end side of the side plates 4b in the longitudinal direction of the cutter spokes 4 via a rotation support mechanism 30. Are rotatably supported by the respective roller support members 31, and are exchangeably supported by attaching and detaching lids (not shown) which are detachable from the roller support members 31. On the rear side of the roller cutter 15, a flow opening H for flowing the excavated earth and sand-like material backward is provided.

A pair of rotary seat forming members 32 are respectively provided on a pair of side plates 4b, 4b of each cutter spoke 4, and a roller support member 31 having a convex partial spherical shape or a partial cylindrical surface shape is provided. They are respectively formed in pairs facing surfaces of the rotary seat forming member 32. A water stop casing 32a is installed between the upper and lower rotary seat forming members 32, and the passages W1, W
Form 2

A part of the rotary seat forming member 32 is formed in a concave partial spherical surface or a partial cylindrical surface, and has a convex partial spherical shape (or a partial cylindrical shape) rotatably engaged with the surface.
Are formed at both side positions of the roller support member 31. That is, the rotation support mechanism 30 has the engagement portion 31a, and the roller support member 31 is
To be rotatable. Rotating seat forming member 32
Are provided with seal members 31b and 31c at the front and rear sides for preventing excavated earth and sand from flowing into the passages W1 and W2.

The roller cutter 15 is used as the cutter spoke 4
At the excavation position projecting from the front end of the roller cutter 15 (see FIG. 13), the protrusion amount δ5 of the roller cutter 15 from the cutter spoke 4 becomes larger than the protrusion amount δ6 of the teeth cutter 17 (that is, the roller cutter 15 precedes). Therefore, the roller cutter 15 can precede the excavation of the bedrock.

In order to rotate the roller support member 31,
A connection mechanism and a rotation drive device (both not shown) similar to those of the above-described embodiment are provided for each cutter spoke 4, and a pair of hydraulic jacks is used to connect one and the other of the shaft members of the connection mechanism (ie, the cutter spokes). 4 Near both ends in the length direction)
And transmits the soil load from the roller support member 31 to the pair of hydraulic jacks and from the hydraulic jack to the cutter spokes 4. The coupling mechanism and the hydraulic jack have the same engaging portion and engaged portion as in the first embodiment, and the roller support member 31 cannot rotate when the engaging portion and the engaged portion are in the engaged state. And the roller support member 31 is rotatable when in the disengaged state. Of course, it is also possible to rotate the roller support member 31 by operating the engaging portion using an operating tool or the like in the non-engaged state without employing the rotation driving device.

The 90-degree rotation position (see FIGS. 14 and 15) of the roller support member 31 is a retreat position of the roller cutter 15, and the roller cutter 15 has one (rotation side) water stop in the retreat position. By removing the casing 32a from the rotary seat forming member 32, it can be replaced. At the retracted position of the roller cutter 15, the partial spherical surface (or partial cylindrical surface) of the roller support member 31 and the seal members 31b and 31c prevent intrusion of earth and sand or water, and close the flow opening H. Therefore, the replacement of the roller cutter 15 can be performed safely and easily from within the cutter spoke 4.

A seal wall plate 33 connects the other water-stopping casing 32a to the bottom of the roller support member 31 and at the 90-degree rotation position of the roller support member 31 to form the rotary seat forming member 32.
The seal wall plate 33 is detachably provided by removing from the cutter spokes 4 at the 180-degree rotation position (see FIG. 16) of the roller support member 31 from the excavation position.
Is formed so as to be substantially flush with the front end. Therefore, the tooth cutter 17 can precede when excavating the earth and sand portion.

Next, the operation of the above-described cutter device 3B will be described. As shown in FIG. 13, when excavating a rock part, the roller cutter 15 is held at the excavation position, and the engaging part and the engaged part are brought into the engaged state. In this state, the roller supporting member 31 cannot rotate, and the protrusion amount δ5 of the roller cutter 15 becomes larger than the protrusion amount δ6 of the teeth cutter 17. Therefore, the roller cutter 15 can precede the excavation of the bedrock portion, so that the cutter device 3 can be rotated by the cutter drive motor 7 and the rocker portion 15 can be suitably excavated by the roller cutter 15.

As shown in FIGS. 15 and 16, during excavation of the earth and sand portion, the rotation of the cutter device 3 is temporarily stopped, the engagement between the engaging portion and the engaged portion is released, and the roller support is released. The member 31 is made rotatable. Subsequently, the rotation driving device is driven to move the roller support member 31 from the excavation position described above to 9 degrees.
Stop at the position rotated 0 degrees. The other casing 32a for waterproofing is removed from the rotating seat forming member 32, and thereafter,
The seal wall plate 33 is fixed to the roller support member 31 (FIG. 1).
5). When the seal wall plate 33 is fixed (or removed), the partial spherical surface (or partial cylindrical surface) of the roller support member 31 and the seal members 31b and 31c prevent earth and sand and water from entering, and close the flow opening H. . Therefore,
The attachment / detachment of the seal wall plate 33 can be easily and safely performed without being disturbed by water or earth and sand from within the cutter spokes 4.

After the other water-stop casing 32a is again fixed to the rotary seat forming member 32, the rotary drive device is driven to rotate the roller support member 31 by 180 degrees from the above-described excavation position (see FIG. 16). ) To bring the engaging portion and the engaged portion into an engaged state. The roller support member 31 is
By switching to the position rotated by 80 degrees, the teeth cutter 17 can be moved ahead when excavating the earth and sand portion. Therefore, the cutter device 3 is rotated by the cutter drive motor 7, and the earth and sand portion is suitably rotated by the teeth cutter 17. Can be drilled.

As shown in FIG. 14, the roller cutter 15
At the time of replacement due to wear or loss of the roller, at the 90-degree rotation position of the roller support member 31, one of the water stopping casings 32a is removed from the rotary seat forming member 32, and the cover of the roller support member 31 is removed. Cutter 1
5 is replaced from within the cutter spokes 4. At the retracted position of the roller cutter 15, the partial spherical surface (or partial cylindrical surface) of the roller support member 31 and the seal members 31b, 3
1c prevents earth and sand and water from entering, and closes the flow opening H. Therefore, the roller cutter 15 can be easily and safely replaced without being disturbed by water, earth and sand from inside the cutter spoke 4. Other operations and effects substantially similar to those of the above-described embodiment can be obtained.

[0063]

According to the first aspect of the present invention, at the time of excavation of the rock, the roller cutter can be switched to the excavation position by rotating the roller support member via the rotation support mechanism. With this roller cutter, the rock portion can be suitably excavated. When excavating the earth and sand portion or replacing the roller cutter, the excavation of the shield machine is temporarily stopped, and the roller cutter is switched to the retracted position by rotating the roller support member via the rotation support mechanism. Therefore, the roller cutter does not hinder earth and sand excavation and can suppress uneven wear, and the roller cutter can be safely replaced from the inside of the cutter spoke . The inner surface of the rotating seat forming member is sealed
A sealing member is provided, and the sealing member is
The space between the material and the rotating seat forming member is sealed.
To prevent the inflow of sediment, etc.
Can be rotated.

According to the invention of claim 2, the roller supporting member
The load at the time of excavation acting on the
Since a reaction force support member for transmitting to the forming member was provided,
The soil load acting on the roller cutter during cutting reduces the roller support
Transmitted to the member and transmitted from the roller support member to the reaction force support member
The force is transmitted from the reaction force support member to the rotary seat forming member. So
Therefore, the supporting force of the roller cutter is controlled by the reaction force supporting member.
It is transmitted stably and reliably. The other effects are the same as those of the first aspect. According to the invention of claim 3, the roller support is provided.
The holding member is rotated manually or by operating the rotation driving means.
Operation section for the roller support member.
Manual or rotary drive from inside the cutter spoke
By operating in steps, the roller support member can be rotated
You. Therefore, the position switching of the roller cutter can be performed safely and easily.
You can simply do it. The other effects are the same as those of the first or second aspect .

According to the fourth aspect of the present invention, a plurality of roller caps are provided.
Rotary drive of multiple roller support members for the printer
Connection mechanism that interlocks and connects these roller support members
And a plurality of roller support members are rotated via the connecting mechanism.
With a rotatable driving means, one end of the shield excavation
Stop the excavation of the machine, drive the rotation drive means, and connect the
To simultaneously rotate a plurality of roller support members through
To quickly switch the position of multiple roller cutters.
I can. In addition, the same effect as any one of the first to third aspects is obtained.

According to the fifth aspect of the present invention, the roller cutter
On the back side of
When excavating the rock,
The roller support member and roller cutter are connected via a rotation support mechanism.
To switch the roller cutter to the excavation position
The rock cutter can be
This roller cutter excavation can be suitably excavated
Excavated sediment at the position
Flows to When excavating earth and sand or using a roller cutter
At the time of replacement, temporarily stop excavating shield shield machine
And the roller support member and the roller cutter rotate
To move the roller cutter to the retracted position.
Switching, the roller support member can close the flow opening
Yes, and if roller cutters hinder sedimentation
Of the roller cutter
The inside of the cutter spokes without being hindered by soil and water
It can be done safely from the department side. Other claims 1-3
The same effect as any one of the above items is obtained. According to the invention of claim 6, the water stopping casing for preventing water and earth and sand is formed of the face plate.
It is detachably protruded from the back and removes the waterproof casing.
The roller cutter can be inspected and replaced by wearing
The roller support member and the roller cutter rotate
To move the roller cutter to the retracted position.
Switching, the roller support member closes the flow opening,
By attaching and detaching the water-stopping casing in the
The cutter can be inspected and replaced without being
It can be done safely from the inside of the spoke. The other effects are the same as those of the fifth aspect .

[0067]

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part of a shield machine according to an embodiment of the present invention.

FIG. 2 is a front view of a cutter device of the shield machine.

FIG. 3 is a longitudinal sectional view of a main part of a cutter device for a shield machine.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a view corresponding to FIG. 3 of the cutter device (roller cutter retracted position).

FIG. 6 is a view of a main part of FIG. 5 in a state where the roller cutter is replaced.

FIG. 7 is a longitudinal sectional view of a main part of a cutter device according to another embodiment 1.

FIG. 8 is a sectional view taken along line BB of FIG. 8;

9 is a longitudinal sectional view of a main part of the cutter device (retracted roller cutter position) of FIG. 7;

FIG. 10 is a sectional view taken along line CC of FIG. 10;

11 is a view of a main part of FIG. 9 in a state where the roller cutter of the cutter device of FIG. 7 is replaced.

FIG. 12 is a sectional view taken along line DD of FIG. 11;

FIG. 13 is a longitudinal sectional view of a main part of a cutter device of another embodiment 2.

14 is a longitudinal sectional view of a main part of the cutter device (roller cutter retracting position) of FIG.

FIG. 15 is a longitudinal sectional view of a main part of the cutter device (with the roller cutter removed) of FIG. 13;

FIG. 16 is a longitudinal sectional view of a main part of the cutter device (roller support member inverted state) of FIG. 13;

[Description of Signs] 1 Shield excavator 3, 3A, 3B Cutter device 4 Cutter spoke 4b2 Dedicated connection chute 15 Roller cutter 18 Rotation support mechanism 19 Roller support member 19c Hex nut 20 Rotary seat forming member 20a Rotary seat 22 Reaction force support Member 25 Connection mechanism 26 Rotation driving device 27 Rotation support mechanism 28 Roller support member 28a Partial spherical surface 28b Shaft portion 29a, 29b Seal member H Flow opening 30 Rotation support mechanism 31 Roller support member 32 Rotary seat forming member 32a Water stop casing

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Susumu Uchiyama 1-3-1 Higashikawasakicho, Chuo-ku, Kobe Kawasaki Heavy Industries, Ltd. Kobe Head Office (72) Inventor Hiroyuki Adachi 4-33 Kitahamahigashi, Chuo-ku, Osaka-shi No. Obayashi-gumi Main Store Co., Ltd. (72) Inventor Shuichi Kumagai 4-33 Kitahama Higashi, Chuo-ku, Osaka-shi Obayashi Gumi Main Store F-term (reference) 2D054 BA06 BB06 BB07

Claims (10)

[Claims] 1. A shield machine for a shield machine having a plurality of roller cutters on a front surface thereof, a roller support member for rotatably supporting each of the roller cutters, and a roller mounting frame for rotating each of the roller support members. And a roller support member and a roller cutter are rotated via the rotation support mechanism, so that the roller cutter can be switched between an excavation position and a retracted position. Cutter equipment for shield machine. 2. The cutter device for a shield machine according to claim 1, wherein the roller cutter at the retracted position is configured to be inspectable and replaceable. 3. A rotatable seat forming member having a rotatable seat with which the roller support member is rotatably engaged, and a seal member for sealing an inner surface side of the rotatable seat forming member is provided. The cutter device for a shield machine according to claim 1, wherein: 4. The rotation support mechanism according to claim 1, further comprising a roller support member fixedly provided on a roller mounting frame and having a partial spherical surface or a partial cylindrical surface.
4. The cutter device for a shield machine according to any one of items 3 to 5. 5. The rotary seat is formed on a rotary seat forming member fixed to a roller mounting frame, and the roller cutter can be switched between an excavation position and a retreat position without interfering with the surface of the rotary seat. The cutter device for a shield machine according to claim 4, characterized in that: 6. The shield according to claim 5, further comprising a reaction force support member for transmitting a load at the time of excavation acting on the roller support member from the roller support member to the rotary seat forming member. Cutter device for excavator. 7. The shield excavating device according to claim 1, further comprising an operation portion for rotating the roller support member manually or by rotating the roller support member. Machine cutter device. 8. A connecting mechanism for interlockingly connecting a plurality of roller supporting members for a plurality of roller cutters arranged in the length direction of the roller mounting frame in order to synchronously rotate the plurality of roller supporting members; The cutter device for a shield machine according to any one of claims 1 to 3, further comprising a rotation driving unit that can rotate the plurality of roller support members via the connection mechanism. 9. The method according to claim 1, wherein a flow opening is provided on the back side of the roller cutter to allow the excavated sediment-like material to flow backward. Cutter device for shield machine. 10. A water-stopping casing for preventing water and earth and sand is detachably protruded from a back surface of the face plate, and the roller cutter can be inspected / replaced by detaching / attaching the water-stopping casing. The cutter device for a shield machine according to claim 9, wherein