JP2898967B1 - Erector device for shield machine - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To provide an erector device for a shield excavator which has improved durability by suppressing the occurrence of galling and abrasion of a sliding portion of the erector device for a shield excavator. SOLUTION: An erector base frame 29 rotates around an axis,
The movable frame 35 is moved in the Z direction by the hydraulic cylinder 34, the main body frame 41 is moved in the Y direction by the hydraulic cylinder 40, and the segment gripper 46 provided on the main body frame 41 is moved in the X direction by the hydraulic cylinder 45. The movable frame 3 is configured so that the guide rods 39A and 39B guide and support the main body frame 41 in the Y direction.
5, and the guide rods 39A and 39B are formed of rod members having a circular cross section, so that the segment 22 can be assembled, and a large moment resulting from the weight of the segment 22, the segment holding portion 46, and the main body frame 41 acts. Even so, the moment is received in a wide area on the peripheral surface of the rod member, and the surface pressure of the sliding portion is reduced, so that the sliding portion is less likely to be worn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erector device for a shield excavator, and more particularly to an erector device for a shield excavator for transferring a segment to a predetermined position in a circumferential direction on an inner surface of a tunnel having a rectangular cross section and sequentially assembling the segment. Related to the device.

[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. A conventional shield machine is configured to excavate a tunnel having a circular cross section while switching between a state of excavating while rotating a cutter disk in a normal direction and a state of excavating while rotating the cutter disk in a reverse direction.

In recent years, a shield tunneling machine for a rectangular tunnel capable of excavating a tunnel with a rectangular cross section has been proposed and developed for practical use. For example, JP-A-10-6
In the shield machine described in Japanese Patent No. 1382, a front-side rectangular cross-section body member is provided as a skin plate, and a rectangular-section shield frame connected to a rear end thereof is provided. A cutter rotating drive means for rotating and driving the cutter disk, wherein the cutter disk is mounted on the disk body and the disk body, and revolves while rotating and rotating in synchronization with the rotation of the disk body.
And a pair of planetary cutters.

[0004] A planetary gear mechanism for rotating the planetary cutter in conjunction with the rotation of the disk body is provided, and the contour of the planetary cutter is formed in accordance with the ratio between the rotational speed and the revolutional speed of the planetary cutter to obtain a rectangular shape. The cross section tunnel can be excavated. The planetary cutter has a substantially leaf shape, and a plurality of cutter bits are mounted on an outer peripheral portion thereof. During tunnel excavation, a plurality of shield jacks arranged rearward inside the shield excavator generate reactive forces on the lining segments on the inner surface of the tunnel to generate excavation thrust, The cutter disc is rotated, and a circular cross section at the center of the tunnel is excavated with the main cutter of the disc body, and a portion overlapping the circular cross section and four corners are excavated with a pair of planetary cutters.

[0005] This type of shield excavator is provided with an erector device for assembling a segment on the inner surface of a tunnel having a rectangular cross section while excavating the ground by a shield method. For example, as disclosed in Japanese Utility Model Laid-Open Publication No. 6-18499, this type of erector device rotates a swivel ring provided inside a shield machine and an axis parallel to the excavation direction. And a hydraulic motor.

[0006] A first ring orthogonal to the axis is provided on the revolving ring.
A horizontal beam slidable in the direction and a pair of hydraulic cylinders for slidingly driving the horizontal beam are provided, and a movable table is provided on the horizontal beam. The movable table is configured to be slidable in a second direction orthogonal to the axial direction and the first direction using a horizontal beam as a guide, and a guide is also provided on the movable table. The segment gripping device is a third parallel to the axis along the guide.
It is arranged to be movable in the direction. In this shield excavator, the segment is rotated at an arbitrary rotation angle (rotational phase position) around the axis by an erector device, and is freely moved in a first direction, a second direction, and a third direction to be tunneled. Assemble at a predetermined position on the inner surface.

[0007]

In the above-mentioned erector device, a rectangular slide guide is employed for the movable table to slide in the second direction with respect to the horizontal beam. Therefore, during assembling the segments repeatedly, an excessive load acts on one side surface of the approximately rectangular cross section of the rectangular slide guide due to a large moment when the segments are gripped by the segment gripping device. The surface pressure of the sliding surface becomes considerably large, and the sliding surface is scratched due to galling or abrasion, so that the movable table does not slide smoothly and the durability of the elector device is significantly reduced. In order to suppress this, it is necessary to limit the upper limit of the weight of the segment.

[0008] Since the end portions of the cylinder bodies of the pair of hydraulic cylinders for driving the horizontal beam in the first direction are connected to and supported by the swing ring via the bracket, the structure for supporting the connection is complicated. Become In addition, when the configuration is such that the segment is non-rotatably gripped by the segment gripper, the structure of the segment gripper is complicated, and when the segment is rotatably gripped by the segment gripper, When the segment is moved to the side surface or the upper surface of the tunnel, the segment rotates with respect to the segment holding portion, which is not preferable.

SUMMARY OF THE INVENTION It is an object of the present invention to suppress the occurrence of galling and abrasion of a sliding portion of a shield excavator, thereby enhancing durability, and to provide a sliding portion that can withstand a large load and an upper limit of the weight of a segment. The value need not be limited, the support structure of the pair of hydraulic cylinders moving in the first direction can be simplified, the segment gripped by the segment gripper can be prevented from swinging on its own, etc. is there.

[0010]

According to a first aspect of the present invention, there is provided an elector apparatus for a shield excavator for mounting a segment on an inner surface of a tunnel having a rectangular cross section. An erector base frame that is rotatably supported about a parallel axis and that can be rotationally driven by rotational driving means,
A movable frame mounted on the erector base frame so as to be movable in a first direction orthogonal to the axis, first moving means for driving the movable frame in a first direction, and A main body frame movably mounted in a second direction orthogonal to the first direction, second moving means for driving the main body frame to move in the second direction, and a third direction parallel to the axis with the main body frame. And a third moving means for driving the segment gripper in a third direction, the main frame being attached to the movable frame. Two sets of guide rods are provided so as to be movable in two directions, and a guided portion guided and supported by the two sets of guide rods is provided on the main body frame. In is characterized in that it has configuration.

The erector base frame is rotated about the axis parallel to the excavation direction by the rotary drive means, and the movable frame mounted on the erector base frame is moved in the first direction orthogonal to the axis by the first moving means. The main body frame mounted on the movable frame is moved in the second direction orthogonal to the axial direction and the first direction by the second moving means, and the segment gripping part mounted on the main body frame is moved to the axial center by the third moving means. Parallel third
Since the segment moves in the direction, the segment can be gripped by the segment gripper, transferred to a predetermined position on the inner surface of the tunnel, and sequentially assembled. Two sets of guide rods are provided on the movable frame so as to guide and support the main body frame in the second direction, and a guided portion guided and supported by the two sets of guide rods is provided on the main body frame, and each guide rod has a circular cross section. When the segment is gripped by the segment gripping portion, even if a large moment due to the weight of the segment, the segment gripping portion, and the body frame acts, the moment is applied to the circumference of the rod member. It can be received in a wide range of areas on the surface, the surface pressure of the sliding part between the rod member and the guided part is reduced, and it is difficult to wear,
The two sets of guide rods and the body frame can maintain a smooth sliding function and increase durability. Since two guide rods are provided, the main body frame does not rotate.

According to a second aspect of the present invention, there is provided the erector device for a shield excavator according to the first aspect, wherein each set of the guide rods comprises a pair of rod members arranged in series in the longitudinal direction thereof. Each rod member is supported by a movable frame at both ends. Since the length of each rod member is reduced and both ends thereof are supported by the movable frame, the support rigidity of each rod member is strengthened, the rod member is hardly bent, and the diameter of each rod member can be reduced to reduce the weight. .

According to a third aspect of the present invention, in the erector device for a shield machine, in the second aspect of the present invention, the first moving means includes a pair of hydraulic cylinders for driving and moving both ends of the movable frame. A middle portion of the cylinder body in the length direction is trunnion-supported by an erector base frame so as to be rotatable around an axis parallel to the axis. When the movable frame is moved in the first direction by expanding and contracting the pair of hydraulic cylinders, an error occurs in the amount of expansion and contraction of the pair of hydraulic cylinders, or a direction in which the first direction is inclined with respect to the horizontal direction. Therefore, even when the loads acting on the pair of hydraulic cylinders become unbalanced, the movable frame can move smoothly in the first direction through the rotation of the cylinder bodies at the trunnion support portions. In addition, since the trunnion support is provided at an intermediate portion in the length direction of the cylinder body of the hydraulic cylinder, the configuration for supporting the hydraulic cylinder on the erector base frame is simplified.

According to a fourth aspect of the present invention, there is provided the erector device for a shield excavator according to the third aspect of the present invention, wherein the main body frame allows the segment gripped by the segment gripper to swing around an axis parallel to the axis. A pair of vibration-preventing means for suppressing the vibration is provided, and each vibration-preventing means has a vibration-preventing hydraulic cylinder and a press pad which is driven by a rod of the hydraulic cylinder and presses the surface of the segment. .
When the segments gripped by the segment gripper are moved and assembled, a pair of press pads are respectively driven by a pair of vibration-preventing hydraulic cylinders, and two places on the surface of the segment gripped by the segment gripper are pressed by the press pads. By pressing each, it is possible to suppress the segment from swaying (swinging) around an axis parallel to the axis.

[0015]

Embodiments of the present invention will be described below. First, a shield tunnel machine for a rectangular tunnel will be described, and then an erector device applied to the shield machine will be described. As shown in FIGS. 1 and 2, the shield machine 1 has a front body 1 a having a rectangular cross section and a rear body 1 b having a rectangular cross section connected to a rear side thereof. Are connected via a center bent portion and a plurality of center bent jacks 2. The cutter disk 3 is disposed on the front end side of the front body 1a.
Has a disk main body 4, a pair of planetary cutters 5 mounted on the disk main body 4, and an annular cutter drum 6 connected to the disk main body 4 by a plurality of connecting members 4b.

A cutter rotation drive mechanism 7 for rotating the disk body 4 and the cutter drum 6 is provided. A main cutter 4a is provided at a front end of the disk body 4, and the main cutter 4a rotates integrally with the disk body 4. The main cutter 4a is provided with a plurality of cutter bits 8. As shown in FIGS. 1 to 3, a planetary gear mechanism 9 for rotating each planetary cutter 5 in synchronization with the rotation of the disk body 4, that is, the rotation of the cutter drum 6, is provided inside the cutter drum 6. Of the planetary cutter 5
Is formed in a leaf shape according to the ratio between the rotation speed and the revolution speed.

On the rear side of the cutter disk 3, there is provided a partition structure 11 integrally fixed to the front body 1a with a chamber 10 therebetween. The partition structure 11 is composed of a horizontal cylinder 12 and a central wall. 12a and an annular wall portion 13. The planetary gear mechanism 9 includes a sun gear 14, a pair of idle gears 15 meshed with the sun gear 14, and a pair of idle gears 1.
5 has a pair of planetary gears 16 meshed with each other, and the sun gear 14 is formed along the outer periphery of the cylindrical body 12. The planetary cutter 5 and the planetary gear 16 are linked by a planetary shaft 17. Rear end 17a of planet shaft 17
The planetary gear 16 and the planetary gear 16 are connected by a spline connection, and the front end 17b of the planetary shaft 17 and the planetary cutter 5 are connected via a bolt. A planet housing 17 is provided on the planet shaft 17.

As shown in FIG. 1, the cutter rotation drive mechanism 7 has a ring gear 19 having internal teeth provided between the rear end side of the cutter drum 6 and the annular wall portion 13, and rotationally drives the ring gear 19. Multiple cutter drive motors 20
It is composed of The ring gear 19 is fixed to the cutter drum 6 and is supported on the annular wall 13 via a slewing bearing. Each cutter drive motor 20 is composed of, for example, a hydraulic motor, and a pinion gear 20a fixed to the motor shaft.
Are in mesh with the ring gear 19. During tunnel excavation,
The rotation direction of the cutter disk 3 is reversed every time one ring is excavated.

The plurality of shield jacks 21 are for generating thrust for excavation. Each shield jack 21 is disposed rearward, and the tip of the rod is spreader 21b via an eccentric fitting 21a. Are connected to each other, and a shield jack 21 generates a digging thrust by applying a reaction force to the segment 22 lining the inner surface of the tunnel. The main cutter 4a is provided with a copy cutter 23A and the one planetary cutter 5 is provided with a pair of copy cutters 23B in order to make the tunnel outer shape larger when the excavation direction of the rectangular tunnel is curved. The other planetary cutter 5 is provided with a copy cutter 23C.

A screw conveyor 24 extending rearward from the central wall portion 12a is provided as an earth discharging facility, and the earth and sand in the chamber 10 is transferred to a rear belt conveyor, and the earth and sand sent to the belt conveyor is transferred to a belt conveyor or a conveyor. It is transported to the rear in the tunnel by the cart and transported to the ground.

Next, an erector device for attaching a segment to the inner surface of a tunnel having a rectangular cross section will be described with reference to FIGS. The erector device 28 includes an erector base frame 29.
, A movable frame 35, a main body frame 41, and a segment grip 46. That is, the annular frame 25 is fixed to the inner peripheral portion of the rear trunk 1b, and the guide ring 27 is fixed to the annular frame 25 via the plurality of brackets 26a.
Has been fixed.

As shown in FIG. 4 and FIG.
8 is supported by a guide ring 27 via a plurality of guide rollers 30 so as to be rotatable around an axis parallel to the excavation direction (hereinafter referred to as the axis). The erector base frame 29 includes a pair of guide cylinders 32 and a connecting member
A chain 29a is provided on the inner peripheral surface of the erector base frame 29.
Is provided. Hydraulic motor 3 as rotation drive means
1 is provided on a bracket provided on the front surface of the annular frame 25, and a sprocket 31a is fixed to the motor shaft. This sprocket 31a is
9 and transmits the rotational driving force of the hydraulic motor 31 to the erector base frame 29 via the chain 29a. The guide cylinders 32 are fixed to the rear surface of the erector base frame 29 via a connecting member 33, and are disposed at symmetric positions in FIG.

As shown in FIGS. 5 and 6, first hydraulic cylinders 34 as first moving means are provided on the side surfaces of the guide cylinder 32, respectively. That is, the cylinder body 34a
Is supported by the trunnion support portion 32a of the guide cylinder 32 so as to be rotatable about an axis parallel to the axis, and the rod portion 34b is moved in a first direction (arrow) perpendicular to the axis. (In the Z direction, hereinafter referred to as the Z direction).

The movable frame 35 includes a pair of plates 36, 3
6 has a beam structure in which a plurality of spar members 37 are joined in parallel with each other, and has a pair of guide rods 32 </ b> A that guide and slide on a pair of guide cylinders 32. That is, the longitudinal direction of the plate body 36 is disposed in a second direction (shown by an arrow Y direction, hereinafter referred to as a Y direction) orthogonal to the axial direction and the Z direction, respectively. The part is the guide rod 32
A is connected to one end of each of the first hydraulic cylinders A, and both side portions of the movable frame 35 are connected to the rod portions 34b of the pair of first hydraulic cylinders 34, respectively. The movable frame 35 moves in the Z direction by driving the first hydraulic cylinder 34 integrally with the guide rod 32 </ b> A and while the guide rod 32 </ b> A slides on the guide cylinder 32.

When the movable frame 35 is moved in the Z direction by expanding and contracting the pair of first hydraulic cylinders 34, an error occurs in the amount of expansion and contraction of the pair of hydraulic cylinders 34, and the Z direction is shifted in the horizontal direction. Even in a case where the load acting on the pair of first hydraulic cylinders 34 in the direction inclined with respect to the first hydraulic cylinder 34 becomes unbalanced, the movable frame 35 is moved through the rotation of the cylinder body 34a at the trunnion support portion 32a. It can move smoothly in the direction. In addition, since the truncated portion of the first hydraulic cylinder 34 in the length direction of the cylinder body 34a is trunnion-supported, the configuration for supporting the first hydraulic cylinder 34 on the erector base frame 29 is simplified.

As shown in FIGS. 6 to 9, the guide rod support substrate (hereinafter, referred to as a support substrate) 38 is
5, two guide rods 39A, 39
B are supported on the support substrate 38 in parallel with a predetermined interval in the Z direction and with the longitudinal direction facing the Y direction (see FIG. 9). Guide rod 39A (39B) of each set
Are circular cross-sections supported in series in the respective longitudinal directions.
It is composed of two rod members 39a and 39b. That is, the two sets of guide rods 39A and 39B are composed of a total of four rod members 39a and 39b, and the four rod members 39a and 39b are independently supported by the support substrate 38, respectively. Second hydraulic cylinder 40 as second moving means
Are supported on the surface of the plate 36 of the movable frame 35 along the length direction.

As shown in FIGS. 8 to 10, the main body frame 41 has four guided portions 42 at its front portion, and the four guided portions 42 are two sets of guide rods 39A and 39B.
(Total of four rod members). A connecting member 43 is fixed to one of the guided portions 42, and the connecting member 43 is connected to the second hydraulic cylinder 40.
Is connected to the rod portion 40a. Of course, the connecting member 4
In 3, since both the guided portion 42 and the rod portion 40 a are connected on the front and back surfaces of the support substrate 38, the slit 38 a which is the passage of the connecting member 43 is formed along the longitudinal direction of the support substrate 38. I have. The main body frame 41 is
The guided portion 42 is configured to move in the Y direction while being guided and slid by the rod members 39a and 39b by driving the second hydraulic cylinder 40.

As shown in FIGS. 10 and 12, a pair of slide rods 44A and 44B are parallel to each other inside the main body frame 41 at a predetermined interval and the longitudinal direction is parallel to the axis. (Indicated in the X direction, hereinafter called the X direction.)
Each is supported towards. The third hydraulic cylinder 45 as a third moving means is supported at a substantially central portion in the main body frame 41 along the X direction.

As shown in FIGS. 10 to 12, the segment gripping portion 46 has a gripping frame 46a and a gripping member 46b fixed to the gripping frame 46a and protruding from the main body frame 41 in the first direction. And segment 22
Is moved while being held by the holding member 46b. Of course, the main body frame 4 is provided so that the gripping member 46b can move freely or the third hydraulic cylinder 45 can be incorporated.
1 is provided with an opening or a notch as appropriate. The grip frame 46a includes a pair of guided portions 47, and each guided portion 47 is guided and supported by a pair of slide rods 44A and 44B. Further, the gripping frame 46a
Is connected to the rod portion 45a of the third hydraulic cylinder 45. The segment holding portion 46 is provided with the third hydraulic cylinder 4
5, the guided portion 47 is moved by the slide rod 44.
A and 44B move in the third direction while sliding.

As shown in FIGS. 13 and 10, a pair of anti-vibration mechanisms 48 are provided on both sides of the gripping frame 46a, and the segments 22 gripped by the gripping members 46b rotate around the axis parallel to the axis. This is for suppressing the swing. Each anti-vibration mechanism 48 has an anti-vibration hydraulic cylinder 49 that is trunnion-supported by the gripping frame 46a, and a pressing pad 50. The holding pad 50 has a pivoting fulcrum 50a on one end side pivotally supported by the gripping member 46b, and the other end 50b connected to the rod portion 49a of the vibration-preventing hydraulic cylinder 49. The pair of anti-vibration mechanisms 48 includes an anti-vibration hydraulic cylinder 49.
, The pair of press pads 50 swings to press two places on the surface of one segment 22, and
The deflection of the segment 22 gripped by b is suppressed.

Next, a hydraulic system for supplying and discharging hydraulic pressure to and from the erector device 28 will be described. First hydraulic cylinder 34,
The second hydraulic cylinder 40, the third hydraulic cylinder 45, and the vibration-preventing hydraulic cylinder 49 are each connected to a hydraulic control circuit, and each of the rod portions 34b, 40
The moving direction and the moving amount of a, 45a, and 49a are controlled.
The hydraulic control circuit includes a common hydraulic supply source (including an oil tank, a hydraulic pump, a pump drive motor, and a filter).
, Each hydraulic cylinder 34, 40, 45,
An oil passage extending to 49, a flow control valve interposed in the oil passage,
It has an electromagnetic direction switching valve interposed in the oil passage, a control device, and the like. The control device includes a microcomputer and a control program previously input and stored in the microcomputer. The control device outputs, for example, a signal for controlling the electromagnetic directional control valve based on the input signal to the electromagnetic directional control valve.

Next, the operation of the shield machine 1 described above will be described. In a normal excavation in which a tunnel having a rectangular cross section is excavated in a straight shape, the cutter drive motor 20 is driven while generating thrust for excavation from the plurality of shield jacks 21, and the pinion gear 20 a
Is rotated, the ring gear 19 is rotated, and the cutter drum 6 is rotated.
Rotates, and the planet housing 18 and the disk body 4 rotate integrally with the cutter drum 6. The rotation of the disk body 4 causes the main cutter 4 a and a pair of planetary cutters 5 to rotate about the center of the disk body 4. As a result, a tunnel having a circular cross section is excavated by the rotation of the main cutter 4a.

On the other hand, the planetary cutter 5 is
The disk rotates (revolves) around the center of the disk main body 4 as an axis due to the rotation of. That is, the rotation of the disk body 4 causes the idle gear 15 meshed with the sun gear 14 to rotate while rotating about the center of the disk body 4 as an axis. The rotation of the idle gear 15 causes the planetary gear 16
Rotates and is integrated with the planetary gear 16 and the planetary gear 16
And the planetary shaft 17 rotates on the same axis. The planetary cutter 5 rotates by the rotation of the planetary shaft 17.

Now, the ratio of the revolution speed and the revolution speed of the planetary cutter 5 is set to 1: 4, so that the planetary cutter 5 can rotate the disc body 4 in one rotation while the disc body 4 makes one revolution. Rotates four times in the opposite direction. In this way, by rotating the planetary cutter 5 while revolving, the planetary cutter 5 rotates and revolves while always inscribed in a square. Therefore, with this planetary cutter 5 that revolves and revolves,
The outer periphery of the circular section tunnel is excavated and the rectangular section tunnel is excavated.

The excavation is stopped every time a predetermined one ring is excavated, and the segment pieces 22a, 22b, 22c, and 22c are formed on the latest excavated rectangular one ring portion of the inner surface of the tunnel using the erector device 28. 22d is assembled (see FIG. 5). That is, the segment 22 includes a plurality of types of segment pieces 22a, 22b,
, Each segment piece 22a, 22b,
.. Are sequentially assembled according to a predetermined assembly order.

In the tunnel having a rectangular section, the segment pieces 22c at the corners are assembled first, and the remaining segment pieces 22a, 22b, and 22d are sequentially assembled. Now, as shown in FIGS. 14 to 20, an assembling procedure of one type of segment piece 22a will be described. The segment piece 22a is carried into the vicinity of the erector device 28 by a segment supply device (not shown) or the like. In order to grip the loaded segment piece 22a, the rod portions 34b of the pair of first hydraulic cylinders 34 are protruded by a predetermined amount, and the movable frame 35 is moved in the Z direction by a predetermined amount. At about the same time, the rod portion 40a of the second hydraulic cylinder 40 is adjusted to extend and retract, the main body frame 41 is moved in the Y direction, and the rod portion 45a of the third hydraulic cylinder 45 is adjusted to extend and retract. Is moved in the third direction. Subsequently, a pair of anti-vibration hydraulic cylinders 49
The segment piece 22a is held by the segment holding portion 46 in a state in which the rod portion 49a is projected and the pair of pressing pads 50 are swung to suppress the deflection of the segment piece 22a (see FIG. 14). .

In order to prevent interference when rotating the segment piece 22a around the axis, a pair of first hydraulic cylinders 3
4 are retracted, and the movable frame 35
Is moved in the Z direction (toward the axis center) by a predetermined amount (see FIG. 15). In this state, the hydraulic motor 31 is rotated to rotate the erector base frame 29 by 180 degrees around the axis (see FIG. 16). Subsequently, the rod portion 40a of the second hydraulic cylinder 40 is adjusted to extend and retract, and the main body frame 41 is moved by a predetermined amount in the Y direction (see FIG. 17).

The segment piece 22a from the state shown in FIG.
In order to perform the assembly of the movable frame 35, the rod portions 34b of the pair of first hydraulic cylinders 34 are respectively protruded by a predetermined amount.
Is moved in the Z direction (the wall side of the tunnel) by a predetermined amount (FIG. 1).
8) and the rod portion 4 of the second hydraulic cylinder 40.
0a is adjusted, and the main body frame 41 is moved in the Y direction to finely adjust the segment piece 22a (see FIG. 19). The segment piece 22a is fastened to the reinforced segment 22 with bolts or the like, and the assembly of the segment piece 22a is completed in this state. The other segment pieces are assembled in substantially the same manner as described above, and the assembly of the segment 22 for one ring is completed (see FIG. 20). Then, cutter disk 3
The excavation is resumed by reversing the direction of rotation of.

When the main body frame 41 is moved in the Y direction, the guide rods 39A and 39B
Is provided on the movable frame 35 so as to guide and support in the Y direction, and since the guide rods 39A and 39B are constituted by rod members 39a and 39b having circular cross sections, when the segment piece 22a is gripped by the segment gripper 46. Even if a large moment due to the weight of the segment piece 22a, the segment gripping portion 46, and the body frame 41 acts on the rod member 39,
a, 39b can be received in a wide range on the peripheral surface, and the surface pressure of the sliding portion between the rod members 39a, 39b and the guided portion 42 is reduced, so that it is difficult to wear, and two sets of guide rods 39A are provided. , 39B and the body frame 41 can maintain a smooth sliding function, and the durability can be increased. Since two sets of guide rods 39A and 39B are provided, the body frame 41 does not rotate.

Since the rod members 39a and 39b are reduced in length and both ends are supported by the movable frame 35, the rigidity of the support of the rod members 39a and 39b is enhanced, and the rod members 39a and 39b are hardly bent. 39a, 39b
Can be reduced in diameter to reduce the weight.

When the movable frame 35 is moved in the Z direction by extending and contracting the pair of first hydraulic cylinders 34, an error occurs in the amount of expansion and contraction of the pair of first hydraulic cylinders 34,
Even when the load acting on the pair of first hydraulic cylinders 34 becomes unbalanced in a direction inclined with respect to the horizontal direction, the rotation of the cylinder main bodies 34a at the trunnion support portions 32a can be achieved. The movable frame 35 can move smoothly in the Z direction. Moreover, the first hydraulic cylinder 3
The first hydraulic cylinder 34 is connected to the erector base frame 2 in order to support trunnion in the middle of the cylinder body 34a in the length direction of the cylinder body 34a.
9 is simplified.

A pair of anti-vibration mechanisms 48 are provided to prevent the segment piece 22a gripped by the segment grip portion 46 from swinging about an axis parallel to the axis. The cylinder 49 and the rod 4
9a, and the pressing pad 50 which is pressed by the surface of the segment piece 22a.
When the segment pieces 22a gripped at the position are moved and assembled, the pair of pressing pads 50 are driven by the pair of vibration-preventing hydraulic cylinders 49, respectively, and the two pieces of the surface of the segment pieces 22a gripped by the segment gripping portion 46 are provided. Of the segment pieces 22a by pressing the
Can be restrained from swinging (swinging) around an axis parallel to the axis.

According to the shield machine 1, the erector device 28 is applied to a tunnel having a rectangular cross section. However, the erector device 28 can also be applied to a tunnel having a circular cross section.

[0044]

According to the first aspect of the present invention, the erector base frame is rotated about the axis parallel to the excavation direction by the rotary driving means, and the movable frame mounted on the erector base frame is rotated by the first moving means. The main frame mounted on the movable frame moves in a first direction orthogonal to the center, and the main frame mounted on the movable frame moves in a second direction orthogonal to the axial direction and the first direction by the second moving means, respectively. Since the gripping portion is moved in the third direction parallel to the axis by the third moving means, the segment can be gripped by the segment gripping portion, freely transferred to a predetermined position in the circumferential direction of the inner surface of the tunnel, and sequentially assembled. .

The movable frame is provided with two sets of guide rods for guiding and supporting the body frame in the second direction, and the body frame is provided with guided portions guided by the two sets of guide rods.
Since the guide rod is constituted by a rod member having a circular cross section, even when a large moment due to the weight of the segment, the segment gripper and the main body frame acts when the segment is gripped by the segment gripper, the moment is reduced to the rod. It can be received in a wide area on the peripheral surface of the member, the surface pressure of the sliding part between the rod member and the guided part is reduced, and it is difficult to wear, and the two sets of guide rods and the main body frame are smoothly slid. Dynamic function can be maintained and durability can be increased.

According to the second aspect of the present invention, the rod members are arranged in series in the longitudinal direction, and each rod member is supported by the movable frame at both ends. As described above, since the length of each rod member is reduced and both ends thereof are supported by the movable frame, the support rigidity of each rod member is strengthened, it is difficult to bend, and each rod member is reduced in diameter to reduce the weight. Can be planned. The other effects are the same as those of the first aspect.

According to the third aspect of the invention, the middle of the hydraulic cylinder in the length direction of the cylinder body is trunnion-supported by the erector base frame so as to be rotatable around an axis parallel to the axis. When the movable frame is moved in the first direction by expanding and contracting the pair of hydraulic cylinders, an error occurs in the amount of expansion and contraction of the pair of hydraulic cylinders, or a direction in which the first direction is inclined with respect to the horizontal direction. Therefore, even when the loads acting on the pair of hydraulic cylinders become unbalanced, the movable frame can move smoothly in the first direction through the rotation of the cylinder bodies at the trunnion support portions. In addition, since the trunnion support is provided at an intermediate portion in the length direction of the cylinder body of the hydraulic cylinder, the configuration for supporting the hydraulic cylinder on the erector base frame is simplified. Other effects are the same as those of the second aspect.

According to the fourth aspect of the present invention, the main body frame is provided with a pair of anti-vibration means for preventing the segment gripped by the segment gripping portion from swinging around an axis parallel to the axis. Each anti-vibration means includes a hydraulic anti-vibration cylinder,
A press pad driven by the rod of the hydraulic cylinder to press the surface of the segment, so that when the segment gripped by the segment gripper is moved and assembled, the pair of hydraulic cylinders respectively drive the pair of press pads. Then, by pressing two portions of the surface of the segment gripped by the segment gripping portion with the pressing pad, it is possible to suppress the segment from swaying (swinging) around an axis parallel to the axis. The other effects are the same as those of the third aspect.

[Brief description of the drawings]

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

FIG. 2 is a schematic front view of the shield machine.

FIG. 3 is a schematic front view of a planetary gear mechanism of the shield machine.

FIG. 4 is a vertical sectional side view of the erector device for a shield machine.

FIG. 5 is a view taken along line AA of FIG. 4;

FIG. 6 is an enlarged view of a main part of FIG. 5 (a main part of the elector apparatus).

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a sectional view taken along line CC of FIG. 6;

FIG. 9 is an enlarged view of a main part of FIG. 6;

FIG. 10 is a sectional view taken along line DD of FIG. 4;

FIG. 11 is a sectional view taken along line EE of FIG. 10;

FIG. 12 is a sectional view taken along line FF of FIG. 10;

FIG. 13 is a sectional view taken along line GG of FIG. 10;

FIG. 14 is an explanatory diagram showing a segment gripping state.

FIG. 15 is an explanatory diagram illustrating a suspended state of a segment.

FIG. 16 is an explanatory diagram showing a rotating state of a segment.

FIG. 17 is an explanatory diagram showing a moving state of a segment.

FIG. 18 is an explanatory diagram showing a state in which segments are incorporated.

FIG. 19 is an explanatory diagram showing fine adjustment of a segment.

FIG. 20 is an explanatory diagram showing a completed assembly state of the segments.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 shield excavator 22 segment 28 erector device 29 erector base frame 31 hydraulic motor 32 a trunnion support portion 34 first hydraulic cylinder 34 a cylinder body 35 movable frame 39 A guide rod 39 B guide rod 39 a rod member 39 b rod member 40 second hydraulic cylinder 41 Body Frame 42 Guided Part 45 Third Hydraulic Cylinder 46 Segment Grasping Part 48 Detent Mechanism 49 Detent Hydraulic Cylinder 49a Rod Part 50 Holding Pad

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masayoshi Ishida 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Yasushi Shibata 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Inside (72) Inventor Seiichi Matsushita 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Toru Taniguchi 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (56) References JP-A-6-18499 (JP, U) (58) Fields investigated (Int.Cl. ⁶ , DB name) E21D 11/40

Claims (4)

(57) [Claims] An erector device for a shield machine for mounting a segment on an inner surface of a tunnel having a rectangular cross section,
An erector base frame that is rotatably supported about an axis parallel to the excavation direction and is rotatable by rotary driving means; and a movable unit mounted on the erector base frame so as to be movable in a first direction orthogonal to the axis. A frame, first moving means for driving the movable frame in a first direction, and a main body frame mounted on the movable frame so as to be movable in a second direction orthogonal to the axial direction and a first direction, respectively. Second moving means for driving the main body frame in the second direction; a segment gripper provided on the main body frame so as to be movable in a third direction parallel to the axis; and moving the segment gripper in the third direction. An erector device for a shield machine including a third moving means for driving, wherein the movable frame is provided with two sets of guide rods for guiding and supporting the main body frame so as to be movable in a second direction. An erector device for a shield excavator, characterized in that a guided portion guided and supported by two sets of guide rods is provided on a system, and the guide rods are constituted by rod members having a circular cross section. 2. The set of guide rods comprises a pair of rod members arranged in series in the longitudinal direction thereof, and each rod member is supported by a movable frame at both ends. Item 2. An elector device for a shield machine according to item 1. 3. The first moving means includes a pair of hydraulic cylinders for moving and driving both ends of a movable frame, and each of the hydraulic cylinders has an axial center parallel to the axis in a longitudinal direction of the cylinder body. 3. The erector device for a shield machine according to claim 2, wherein the erector base frame is trunnion-supported to be rotatable around the erector base frame. 4. A pair of vibration-preventing means is provided on the main body frame for suppressing a segment gripped by a segment gripper from swinging about an axis parallel to the axis, and each of the vibration-preventing means is provided with a pair of vibration-preventing means. 4. The shield excavator elector device according to claim 3, further comprising a stop hydraulic cylinder and a press pad driven by a rod of the hydraulic cylinder and pressing a surface of the segment.