JPH0782996A - Segment erector - Google Patents

Abstract

PURPOSE:To promote work efficiency by pivoting an expansion device on a ring device to bear it so that it is capable of pivoting in a horizontal direction and, at the same time, providing a segment holding device to a front end expansion section thereof. CONSTITUTION:In the case a segment 68 conveyed to the front end of a lining 22 is assembled to the lining 22, a ring device 70 is rotated until an expansible direction of an expansion device 88 is changed into a vertical direction. Then, a second driving device 102 and a driving mechanism 98 are extended, the device 88 is pivoted to incline backward and, at the same time, a holding device 100 is displaced to a specific position against the segment 68. After that, after the segment 68 is held by a chuck 108 of the device 100, the driving mechanism 98 and driving device 102 are contracted to suspend the segment 68 to a segment erector 66. The devices 70, 88, 100 and 102 are driven to move the segment 68 to a specific position. In addition, after the segment 68 is assembled to the lining 22, the erector 66 is returned in a wait and see state. According to the constitution, the segment of the front end of the lining is held and can be accurately and easily assembled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment erector used for constructing a tunnel by an excavator having a shield body.

[0002]

2. Description of the Related Art A segment erector for assembling a lining segment on the inner peripheral surface of a tunnel is disclosed in, for example, Japanese Patent Publication No.
No. 2-320, Japanese Patent Publication No. 62-57798, Japanese Patent Application Laid-Open No. 62-174500.

These segment erectors are arranged at the rear of the shield body so as to be rotatable around the axis of the shield body, and are attached to the ring device so as to be extendable and contractible in a direction parallel to the diameter direction thereof. Telescopic device,
It includes a gripping device attached to the telescoping device to grip the segment, and a carrying device such as a hoist that carries the segment to a gripping position below the gripping device.

In the above segment erector, when the segment is assembled to the lining, the gripping device is retracted from the gripping position, the segment is transported to the gripping position by a carrier device such as a hoist, and the gripping device is returned to the gripping position. This is done by the steps of causing the gripping device to grip the segment and then assembling the segment to the lining.

However, in the above segment erector,
The gripping device must be retracted from the gripping position when the segment is transported to the gripping position, and the gripping device must be returned to the gripping position after transporting the segment to the gripping position.

In the known segment erectors, generally,
For the purpose of adjusting the position of the segment with respect to the lining and adjusting the position of the gripping device with respect to the segment conveyed to the gripping position, the gripping device is supported by the telescopic device so as to be capable of reciprocating in the axial direction of the shield body. However, since the reciprocating movable range of the gripping device for such a purpose is extremely small, even if the segment to be assembled is moved to the tip of the lining, the segment cannot be gripped by the gripping device.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to enable a gripping device to grip a segment on a lining.

[0008]

A segment erector according to the present invention includes a ring device including an erector ring rotatably supported at a rear end portion of a shield body about a rotation axis parallel to an axis of the shield body, and the ring device. A telescopic device supported by the device so as to be pivotable about an axis extending in a direction parallel to the diametrical direction of the elector ring, the telescopic device being extendable in a direction intersecting the extension direction of the axis. A device for releasably gripping a segment for tunnel lining, which is attached to a distal end portion of the expansion / contraction device in the expansion / contraction direction; a first drive device for rotating the ring device; A second drive for displacing the device about said axis.

When the segment is assembled to the lining, first, the ring device is rotationally moved by the first drive device to a predetermined state, for example, a state in which the extending / contracting direction of the expansion / contraction device is the vertical direction. Next, the telescopic device is tilted rearward about the axis by the second drive device, and in that state the gripping device grips the segment conveyed to the tip of the lining. Thereafter, the ring device, the telescopic device and the gripping device are displaced so as to move the segment gripped by the gripping device to a predetermined position.

According to the invention, the telescoping device supporting the gripping device is pivotally supported on the ring device about an axis extending parallel to the diametrical direction of the ring device.
By displacing the telescopic device about its axis, the segment at the tip of the lining can be gripped by the gripping device.

[0012] In a preferred embodiment, the second drive device includes at least the telescopic device, and the first drive device is capable of gripping the segment mounted on the tip of the lining by the gripping device.
And the gripping device is displaced to a second position which is a second position in front of the first position.

It is preferable that the second drive device includes at least one jack connected to the ring device and the telescopic device. As a result, when the gripping device grips the segment, a part of the load acting on the telescopic device acts on the jack, so that the load acting on the pivotal support portion of the telescopic device is reduced.

The gripping device includes a guide supported by the telescopic device and extending in a direction parallel to the axis, and a guide movable in a direction parallel to the axis and parallel to the axis. A pair of sliders supported at intervals may be provided, a chuck attached to each slider for holding the segment, and a drive mechanism for individually moving the slider.

However, in the case of constructing a polygonal tunnel, the gripping device includes a guide supported by the telescopic device and extending in a direction parallel to the axis, and a guide extending in a direction parallel to the axis. A pair of sliders movably supported at intervals in a direction parallel to the pivot axis, chucks attached to the sliders for holding the segments, and a drive mechanism for individually moving the sliders. Is preferably provided.

According to such a gripping device, since the segment being gripped can be moved in the direction of the axis, particularly in the case of a segment erector used for constructing a polygonal tunnel, it is used for corners. The segment can be easily and surely arranged at a predetermined position.

It is preferable that each of the sliders is movable between a position where most of the slider is inside the ring device and a position where one end is outside the ring device. As a result, the movable range of the gripped segment becomes large, so that the segment for the corner portion of the rectangular tunnel can be easily and more reliably arranged at a predetermined position.

The gripping device includes a guide supported by the telescopic device and extending in a direction parallel to the axis, and a guide movably supported by the guide in a direction parallel to the axis.
A first slider extending in a direction parallel to the axis; a second slider movably supported by the first slider in a direction parallel to the axis; and a second gripper for gripping the segment. Chuck attached to the slider of
A first drive mechanism for moving the first slider with respect to the guide and a second drive mechanism for moving the second slider with respect to the first slider can be provided.

However, when constructing a polygonal tunnel, the gripping device includes a guide supported by the telescopic device and extending in a direction parallel to the pivot axis, and the guide extending in a direction parallel to the pivot axis. A first slider movably supported and extending in a direction parallel to the axis, and a first slider movably supported in a direction parallel to the axis and spaced in a direction parallel to the axis. Supported pair of second
A slider and each of the second gripping segments
Attached to the slider, a first drive mechanism that moves the first slider with respect to the guide, and a second drive mechanism that individually moves the second slider with respect to the first slider. And a drive mechanism.

According to such a gripping device, even if the length of the guide is small, the amount of movement of the second slider with respect to the guide can be increased, so that the tunnel has a long and narrow rectangular cross section. Also, the corner segment can be easily and surely assembled to the lining.

The first slider is movable between a position in which it is housed in the guide and a position in which it projects from the guide, and each of the second sliders has a position within the first slider. It is preferable that it is movable to a position where it is housed and a position where it projects from the first slider. As a result, the movable range of the gripped segment can be increased, so that the corner segment can be arranged at a predetermined position more easily and more reliably. .

In the case of constructing a polygonal tunnel, the first driving device applies a rotating mechanism arranged at a position corresponding to a corner portion of the shield body and a rotating force of the rotating mechanism to the ring device. And a transmission mechanism for transmitting. This makes it possible to increase the diameter of the elector ring and effectively use the space inside the elector ring.

In a preferred embodiment, the telescopic device includes a plurality of telescopic devices which are supported by the ring device at intervals in a direction parallel to the pivot axis so that the telescopic directions are parallel to each other. Each expander includes a tubular body rotatably supported by the ring device, a rod receivably received in and out of the tubular body, and a drive mechanism for moving the rod into and out of the tubular body. . The gripping device is supported by the rod.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of a square shield excavator will be described with reference to FIGS.

The square shield excavator 10 has a rectangular cylindrical shield body 12, a pair of excavation mechanisms 14 arranged at the front end of the shield body, a drive mechanism 16 for driving the excavation mechanism, and a slide. And a discharging mechanism 18 for discharging.

The excavator 10 is advanced by a plurality of jacks 20 having a shield body 12 arranged inside thereof. The jack 20 acts as a thrust generator for the excavator 10, and uses a rectangular tubular lining 22 constructed on the excavation trace of the excavator 10 as a reaction force body.

The inside of the shield body 12 is defined by the partition wall 24.
It is divided into a front region 26 that receives the shear and a rear region 28 that is maintained at atmospheric pressure behind it. In the partition wall 24, the rear region 28 has a front region 26 in the central portion in the vertical direction.
It is formed so as to partially enter inside. Partition 2
4 has an opening that can be opened and closed by the lid 30. The opening is
It is used when the worker confirms the state in the front area 26, when the worker goes in and out of the front area, and the like.

The drive mechanism 16 includes shafts 32 individually associated with the excavation mechanism 14. The shaft 32 is arranged in the main body 12 so as to extend in the vertical direction at locations spaced in the horizontal direction (the left-right direction) intersecting the direction of the axis of the shield body 12 (the front-back direction) and the vertical direction,
It is supported by the partition wall 24 so as to be capable of reciprocating angular rotation about the axis 34.

The drive mechanism 16 also includes two pairs of cylinder mechanisms 36 individually associated with the shaft 32. Each cylinder mechanism 36 is a pneumatic or hydraulic jack that expands and contracts in synchronization with pressure fluid, and one of the piston and the cylinder is connected to a bracket 38 fixed to the corresponding shaft 32 at the vertical center thereof. And the other of the cylinders is connected to the shield body 12.

Each shaft 32 is angularly reciprocally rotated by the expansion and contraction of the corresponding cylinder mechanism 36. The brackets 38 are connected to each other by a link 40, which synchronizes the angular reciprocal rotational movement of the shaft 32.

Each excavation mechanism 14 has a corresponding shaft 32.
Two arms 4 extending parallel to the front from both upper and lower ends
2, a support rod 44 attached to the tip of the arm and extending in the vertical direction, and a plurality of cutter bits 46 sequentially attached to the support rod in the vertical direction. The cutter bit 46 forms an excavation portion for excavating a face together with the support rod 44.

Each excavation mechanism 14 has a corresponding shaft 32.
Along with the angular reciprocating rotary motion of the above, the face is excavated by performing a swinging motion around the axis 34 of the corresponding shaft 32. The length of each arm 42 is 2 in FIG.
It can be adjusted as indicated by the dashed line.

The discharging mechanism 18 is arranged such that the inside of the rear area 28 is the front area 2
A cylindrical casing 50 extending rearward from the bottom of 6,
A casing 50 rotatably around the axis of the casing
The transport member 52 is disposed inside and extends spirally along the inner peripheral surface of the casing 50, and a drive mechanism 54 that rotates the transport member 52 around the axis of the casing 50 to transport the shear.

The casing 50 is supported by the shield body 12 and the partition wall 24, and has one end opening at the bottom of the forward region 26 between the excavating mechanisms 14 in the horizontal direction to receive the shear in the forward region 26. The other end of the casing 50 is closed by a lid 56. The lid 56 is opened and closed by a jack or the like (not shown).

Instead of directly disposing the conveying member 52 in the casing 50, the casing 50 is fixed to the inner peripheral surface of a cylindrical sleeve, the sleeve is rotatably disposed in the casing 50, and the sleeve is driven by a driving mechanism 54. You may make it rotate by.

At the bottom of the front area 26, a column-shaped fixing member 58 is also arranged. The fixing member 58 is fixed to the shield body 12 and the partition wall 24 so as to be located in front of the shear receiving opening 60 of the discharging mechanism 18 and between the bases of the lower arms 42 of both excavating mechanisms 14, and Together with the bases of the lower arms 42 of both excavation mechanisms 14, they form a crusher for crushing large debris.

Therefore, the lower arms 4 of both excavation mechanisms 14 are
2 acts as a rocking member of the crusher. But,
A swing member for the crusher may be provided separately from the lower arms 42 of both excavation mechanisms 14.

The tip 64 of the upper wall of the shield body 12 is
The shield body 12 is projected forward from the lower wall, the left wall and the right wall to prevent the ground from collapsing.

Cylinder mechanism 3 for drive mechanism 16 during excavation
The jack 20 for propulsion is extended while 6 is expanded / contracted. As a result, since each excavation mechanism 14 makes a swinging motion about the axis 34, the cutting face is excavated by the cutter bit 46 so that the plane shape thereof becomes an arc shape.

The excavated shear is moved backward in the front region 26 with respect to the shield body 12 as the shield body 12 advances, and is received in the opening 60 of the discharge mechanism 18. The shear in the discharge mechanism 18 is taken out from the discharge mechanism 18 by opening the lid 56 at an arbitrary time and is transported to the ground by another transport device.

The shear in the front area 26 is due to the fact that both excavation mechanisms 14 are separated from each other in the left-right direction and the opening 6 of the discharge mechanism 18
Since 0 is located between the two excavation mechanisms 14, the excavation mechanism 14 does not prevent the discharge mechanism 18 from moving toward the opening 60. In addition, the large debris during sliding is in the front area 26
While being moved inside, it is crushed by being sandwiched between the base of the lower arm 42 of the excavation mechanism 14 and the fixing member 58, and the crushed debris passes between the base of the lower arm 42 and the fixing member 58. It passes through and is discharged by the discharge mechanism 18.

When a predetermined distance is excavated, the segment 6
8 is attached to the lining 22 by the segment erector 66 provided in the rear end of the shield body 12. When the segment 68 is assembled to the lining 22, it is preferable to stop the advance of the excavator 10, but it is not necessary to stop the advance of the excavator 10.

Next, one embodiment of the segment erector will be described with reference to FIGS.

Ring device 70 of segment elector 66
Is inside the rear end of the shield body 12
Of the eclectic ring 72 rotatably supported about an axis parallel to the rotation axis of the, and a pair of brackets 74 extending parallel to the rear of the shield body 12 from the eclectic ring 72
With.

A support wall 76 having a hole having a size substantially equal to the inner diameter of the elector ring 72 is fixed to the inside of the rear end of the shield body 12. On the rear surface of the support wall 76,
A plurality of brackets 78 are fixed. A roller 80 is rotatably supported on each bracket 78 about an axis parallel to the axis of the shield body 12.

The elector ring 72 is rotatably supported by the roller 80 about an axis parallel to the axis of rotation of the shield body 12. Each roller 80 has a continuous groove on its outer peripheral surface. The electret ring 72 is prevented from coming off the roller 80 by the flange-shaped portion being received in the groove of the roller 80.

The first drive device 82 for rotating the ring device 70 transmits the rotational force of the rotation mechanism 84 mounted on the support wall 76 to the erector ring 72 of the ring device 70 by the transmission mechanism 86. The transmission mechanism 86 includes a chain (not shown) provided on the outer circumference of the elector ring 72, and a sprocket that is attached to the output shaft of the rotation mechanism 84 and meshes with the chain. However, another transmission mechanism such as a transmission mechanism using a gear may be used.

As shown in FIG. 5, the rotating mechanism 84 is arranged at a position corresponding to one corner portion of the shield body and the tunnel. As a result, the diameter of the elector ring 72 can be increased, the space inside the elector ring 72 can be effectively used for other devices, and the corners of low utility value can be effectively utilized. .

The telescopic device 88 includes a plurality of telescopic devices 90 individually supported by the bracket 74. Each expander 90
Is a tubular body 94 supported by a corresponding bracket 74 by a pin 92 so as to be pivotally movable about a pivot line extending in a direction parallel to the diametrical direction of the elector ring 72 by the pivot pin 92, and the tubular body 94. A rod 96 that is received so as to be able to move in and out and a drive mechanism 98 that causes the rod 96 to move in and out of the tubular body 94 are provided.

Each tubular body 94 also serves as a guide for guiding the movement of the corresponding cylindrical rod 96 in the axial direction thereof. The rod 96 jointly supports the gripping device 100 that grips the segment 68. Each drive mechanism 98 is a hydraulic or pneumatic jack with a cylinder and piston rod in the illustrated example. However, other drive mechanisms may be used.

The cylinder of each jack is connected to the tubular body 94, and the piston rod is connected to the gripping device 100. For this reason, the rod 96 moves in and out of the tubular body 94 and the gripping mechanism 100 is displaced in the axial direction of the tubular body 94 as the jacks expand and contract in synchronization.

The second drive device 102 for displacing the expansion / contraction device 88 comprises a pair of hydraulic or pneumatic jacks which are driven in synchronization with each other. Each jack is individually associated with a stretcher 90 and is also connected to the ring device 70 and a corresponding stretcher 90. Therefore, when both jacks are expanded and contracted in synchronization with each other, the entire expansion / contraction device 88 is displaced as shown by a solid line and a two-dot chain line in FIG.

The amount of expansion and contraction of the second drive device 102 is set such that at least the expansion / contraction device 88 has a posture shown by a chain double-dashed line in FIG. It is a value that can be displaced to the posture shown by the solid line in FIG.

The gripping device 100 includes a rod guide 104 extending in a direction parallel to the axis of the telescopic device 88, and the guide 1.
04, a pair of sliders 106 movably supported in a direction parallel to the axis, a plurality of chucks 108 attached to each slider 106 so as to grip the segment 68, and a plurality of chucks 108 individually corresponding to the sliders 106. A pair of drive mechanisms 110 that move the slider 106 are provided.

The guide 104 is a substantially U-shaped member that opens downward, and is supported by the lower end of the rod 96 at both ends. The slider 106 is a rectangular tubular member having a length dimension that is approximately half the length dimension of the guide 104, and is arranged in the guide 104 at intervals in a direction parallel to the pivot axis. And is supported by the guide 104 via a plurality of rollers 112.

Each chuck 108 has a corresponding slider 1
It is attached to the lower surface of the end of 06. Each drive mechanism 11
In the illustrated example, 0 is a hydraulic or pneumatic jack having a cylinder and a piston rod, and is arranged in the corresponding slider 106 so that the expansion / contraction direction is the moving direction of the corresponding slider 106. Each drive mechanism 1
The ten cylinders are connected to the center of the guide 104, and the piston rods are connected to the corresponding ends of the slider 106.

When the jack of the drive mechanism 110 is contracted, most of the corresponding sliders 106 are accommodated in the guides 104 as shown by the solid line in FIG. However, when the jack of the drive mechanism 110 is maximally extended, the corresponding slider 106 is largely projected from the guide 104, and the end portion of the slider 106 is extended from the electret ring 72 as shown by a chain double-dashed line in FIG. Is greatly separated to the outside of.

When assembling the segment 68 conveyed to the tip of the lining 22 to the lining 22, first, the second drive device 102 and the drive mechanism 98 of the expansion device 88 are contracted, and the expansion device 88 is expanded. The ring device 70 is rotationally moved by the first drive device 82 until the extending / contracting direction of the ring device becomes the vertical direction. Thereby, the expansion / contraction device 88 is moved as shown by the solid line in FIG.

Next, the segment 6 at the tip of the lining 22
The second drive device 102 is extended by a predetermined amount in order to cause the grasping device 100 to grasp 8 and the drive mechanism 98 of the expansion / contraction device 88 is extended by a predetermined amount in this state. As a result, 2 in FIG.
The telescopic device 88 is tilted rearward about the axis of the telescopic device 88, as shown by the dashed line, and the gripping device 100
Are displaced into position relative to the segment 68.

Therefore, the segment 68 at the tip of the lining 22 can be gripped by the predetermined chuck 108 of the gripping device 100. The chucks 108 for holding the segments 68 are a pair of chucks attached to either one of the sliders 106, and are determined depending on the position where the segment 68 is attached to the lining 22.

The gripping of the segment 68 by the gripping device 100 is performed by, for example, a predetermined chuck 108 of the gripping device 100.
This can be done by passing a pin 114 (see FIG. 4) provided in connection with the segment 68 through the segment 68.

Then, the drive mechanism 98 of the expansion / contraction device 88 is contracted by a predetermined amount, and the second drive device 102 is contracted by a predetermined amount. As a result, the segment 68 is suspended from the segment elector 66.

Then, the first drive device 82 is rotated by a predetermined amount, and the second drive device 102, the drive mechanism 98 of the expansion / contraction device 88 and the predetermined drive mechanism 110 of the gripping device 100 are expanded / contracted by a predetermined amount. This causes the lining 22 to move so that the predetermined chuck 108 of the holding device 100 moves the segment 68 held by the holding device 100 to the predetermined position.
Is displaced with respect to.

Next, an operation of assembling the segment 68 held by the holding device 100 at a predetermined position of the lining 22, for example, an operation of assembling with a bolt, a nut or the like is performed. This work may be performed manually or mechanically.

Thereafter, the first and second drive devices 82 and 102, the drive mechanism 98 of the expansion / contraction device 88, and the predetermined drive mechanism 110 of the gripping device 100 are expanded / contracted, so that the segment erector 66 is placed in the standby state. Return.

When the segment 68 is gripped by the gripping device 100, a large load acts on the telescopic device 88. According to the segment erector 66, this load is divided into the pin 92 of the expansion / contraction device 88 and the second drive device 102, so the load acting on the pin 92 is small.

When lining a rectangular tunnel, the segment must be moved in the horizontal and vertical directions in order to place the segment at the corner of the tunnel.

However, according to the segment erector, as shown in FIGS. 5 and 7, for example, an L-shaped segment 6 is used.
After suspending 8a on the segment erector 66 as described above, the drive mechanism 94 of the expansion / contraction device 88 and the drive mechanism 110 of one of the gripping devices 100 are extended to make the segment 68a of the tunnel 68b. It can be placed in the corner.

A segment 6 having the shape shown in FIGS. 5 and 7.
The chuck that grips 8a is a chuck that is supported by the slider on the right side in FIGS. The chuck holding the segment opposite to the segment 68a is a chuck supported by the slider on the left side in FIG. Therefore, the corner segment of the polygonal tunnel can be easily and reliably arranged at a predetermined position.

The maximum movement position of the chuck supported by the left slider in FIGS. 5 and 7 is shown in FIG.
Denote by a. The maximum movement position of the chuck supported by the slider on the right side in FIGS. 5 and 7 is a position symmetrical to the position indicated by reference numeral 108a in FIG. 7 with respect to the center in the width direction of the tunnel.

According to the segment erector 66, the lining 2
Since the segment 68 at the tip end of No. 2 can be grasped by the grasping device 100, the segment 68 can be conveyed to the tip end of the lining 22, and the segment 68 can be conveyed to the position indicated by reference numeral 68c in FIG. You don't have to. Further, each slider 106 is movable to a position where most of the slider is inside the segment ring 72 or inside the guide 104 and a position where one end is outside the segment ring 72 or apart from the guide 104. The movable range of the gripped segment can be increased, and as a result, the corner segment can be arranged at a predetermined position more easily and more reliably.

Next, another embodiment of the gripping device shown in FIGS. 8 and 9 will be described.

The gripping device 120 is the rod 96 of the telescopic device.
Has a guide 122 supported by. The guide 122 is
It is composed of an elongated member having a U-shaped cross section that opens downward and extends in a direction parallel to the axis of the telescopic device.

In the space of the guide 122, the guide 12
A first slider 124 having a length dimension substantially the same as 2 is arranged. The first slider 124 is made of a long member having a U-shaped cross-section that opens downward, and the guide 122.
Of the pair of rollers 126 rotatably supported on the inner side wall portion of the guide 122, and are movably received in the longitudinal direction of the guide 122 and the first slider 124.

The first slider 124 is moved by the first drive mechanism 128 in a direction parallel to the axis. The first drive mechanism 128 is, in the example shown, a hydraulic or pneumatic jack having a cylinder and two piston rods. The cylinder of the first drive mechanism 128 is the guide 12
It is connected to 2. Both piston rods of the first drive mechanism 128 are connected to the first slider 124,
Further, when one is extended, the other is extended and contracted so that the other is contracted.

In the space of the first slider 124, a pair of second sliders 130 having a length dimension of about one half of the first slider 124 are arranged in the longitudinal direction of the first slider 124. They are arranged at intervals. Each second
The slider 130 is made of a long member having a rectangular tubular shape, extends in the longitudinal direction of the first slider 124, and further has a plurality of pairs of rollers rotatably supported by the inner side wall of the first slider 124. The first and second sliders 124 and 130 are movably received by the first and second sliders 132 and 132, respectively.

Each of the second sliders 130 is moved by the second drive mechanism 134 in the direction parallel to the axis. The second drive mechanism 134 is a hydraulic or pneumatic jack having a cylinder and a piston rod in the illustrated example. The cylinder of each second drive mechanism 134 is the first
Is connected to a reaction force wall 136 fixed to the central portion of the slider 124 in the longitudinal direction, and the piston rod is connected to the corresponding second slider 130.

A plurality of pairs of chucks 138 for holding the segments are attached to each of the second sliders 130. Each chuck 138 extends downwardly from a corresponding second slider 130 to grip a segment.

In the gripping device 120, when both piston rods of the first drive mechanism 128 are moved to one side,
The slider 124 protrudes from the guide 122 to one side and moves to the other side to protrude to the other side. First slider 12
4 is moved while supporting the second slider 130. When each second drive mechanism 134 is expanded and contracted, the corresponding second slider 130 moves in and out of the first slider 124.

According to the gripping device 120, each second slider 130 is guided by the second drive mechanism 134 to the guide 122.
And the first slider 12 by the first drive mechanism 128 as well as being moved with respect to the first slider 124.
Since the second slider 130 is moved with respect to the guide 122 with the movement of No. 4, the movable range of the second slider 130 with respect to the guide 122 is large, and as a result, the length dimension of the guide 122 is reduced, and the device is downsized. Even if the tunnel has a long and narrow rectangular cross section, the corner segment can be easily and surely assembled to the lining.

The present invention can be arranged in the shield body of an excavator of a type other than the above. Further, the present invention is
It is suitable to apply not only to a segment erector for lining a rectangular tunnel, but also to a segment erector for lining another polygonal tunnel such as a hexagonal shape or an octagonal shape. However, the present invention may be applied to a segment erector for lining a tunnel having a circular shape, an elliptical shape, or the like.

The present invention is not limited to the above-described embodiment. For example, in the case of the gripping device 100, instead of using the two sliders 106 and the two drive mechanisms 110, one slider and one drive mechanism are used. In the case of the device 120, various improvements such as using one second slider and one second driving mechanism instead of using two second sliders 130 and two second driving mechanisms 134 are possible. it can.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a square shield excavator.

2 is a cross-sectional view of the excavator of FIG. 1 taken along line 2-2.

3 is a cross-sectional view taken along line 3-3 of FIG.

FIG. 4 is a front view showing an embodiment of the segment erector of the present invention and is a front view in which a portion of the ring device is sectioned.

5 is a side view of the segment erector shown in FIG. 4, in which a drive mechanism for one of the expanders is omitted and a part of the gripping device is sectioned.

FIG. 6 is a cross-sectional view of the vicinity of the tubular body of the expander and the rod.

FIG. 7 is a side view of the vicinity of the gripping device and a side view in which a part of the gripping device is cut away.

FIG. 8 is a front view showing another embodiment of the gripping device.

9 is a bottom view of the gripping device of FIG. 8. FIG.

[Explanation of symbols]

 10 Square type shield excavator 12 Shield body 66 Segment erector 68, 68a, 68b, 68c Segment 70 Ring device 72 Elector ring 74 Bracket 82 First drive device 84 Rotation mechanism 86 Transmission mechanism 88 Telescopic device 90 Telescopic device 92 Axis pin 94 Cylindrical body 96 Rod 98 Expansion / contraction drive mechanism 100 Grip device 102 Second drive device 104 Guide 106 Slider 108 Chuck 110 Grip device drive mechanism 114 Pin 120 Grip device 122 Guide 124 First slider 126, 132 Roller 128, 134 Driving mechanism of gripping device 130 Second slider 136 Reaction force wall 138 Chuck

Claims (12)

[Claims] 1. A segment erector used for constructing a tunnel by an excavator including a shield body, wherein the rear end portion of the shield body is rotatably supported around a rotation axis parallel to an axis of the shield body. And a telescopic device supported by the ring device so as to be pivotally movable about a pivot line extending in a direction parallel to the diametrical direction of the elector ring, the cross device intersecting the extension direction of the pivot line. A telescopic device that can be expanded and contracted in the direction in which it extends, a device that releasably grips the segment for tunnel lining, and a gripping device that is attached to the end of the elastic device in the telescopic direction, and that rotates the ring device. A segment erector comprising: one drive device; and a second drive device that displaces the telescopic device about the pivot axis. 2. The second drive device comprises: a first posture in which at least the telescopic device is at a first position where the gripping device can grip a segment placed on a tip portion of a lining; The segment erector according to claim 1, wherein the grip device is displaced to a second position that is a second position in front of the first position. 3. The segment erector according to claim 1, wherein the second drive device comprises at least one jack connected to the ring device and the telescopic device. 4. The segment erector according to claim 1, wherein the shield body has a polygonal tubular shape. 5. The gripping device includes a guide supported by the telescopic device and extending in a direction parallel to the axis, and a slider movably supported by the guide in a direction parallel to the axis. The segment erector according to any one of claims 1 to 4, comprising a chuck attached to the slider that holds the segment, and a drive mechanism that moves the slider. 6. The gripping device includes a guide that is supported by the expansion device and that extends in a direction parallel to the axis, and a guide that is movable in a direction parallel to the axis and that is parallel to the axis. 5. A pair of sliders supported at intervals in the direction of, a chuck attached to each of the sliders that holds the segment, and a drive mechanism that individually moves the sliders. Segment erector. 7. The segment according to claim 6, wherein each of the sliders is movable to a position where most of it is inside the ring device and a position where one end is outside the ring device. Erecta. 8. The gripping device comprises a guide, which is supported by the telescopic device and extends in a direction parallel to the axis, and a pivot supported by the guide so as to be movable in a direction parallel to the axis. A first slider extending in a direction parallel to the line; a second slider movably supported by the first slider in a direction parallel to the pivot line; and each of the second sliders holding the segment. A chuck attached to the slider, a first drive mechanism for moving the first slider with respect to the guide, and a second drive mechanism for moving the second slider with respect to the first slider. The segment erector according to any one of claims 1 to 4, further comprising: 9. The gripping device includes a guide supported by the telescopic device and extending in a direction parallel to the pivot axis, and the pivot supported by the guide movably in a direction parallel to the pivot axis. A first slider extending in a direction parallel to the line; and a pair of second sliders supported by the first slider so as to be movable in the direction parallel to the axis and spaced apart in the direction parallel to the axis. Sliders, chucks attached to each of the second sliders for holding the segments, a first drive mechanism for moving the first sliders with respect to the guides, and the second sliders. The segment erector according to claim 4, further comprising a second drive mechanism that individually moves the first slider. 10. The first slider is movable between a position where it does not project from the guide and a position where it projects, and each of the second sliders has a position where it is accommodated in the first slider. And the segment erector according to claim 9, which is movable to a position protruding from the first slider. 11. The first drive device includes a rotating mechanism arranged at a position corresponding to a corner portion of the shield body,
The segment erector according to any one of claims 4 to 10, further comprising: a transmission mechanism that transmits the rotational force of the rotation mechanism to the ring device. 12. The expander / contractor comprises a plurality of expanders / extensioners supported by the ring device at intervals in a direction parallel to the axis so that the expand / contract directions are parallel to each other. The gripping device includes a tubular body supported by the ring device so as to be pivotally movable, a rod receivably received in the tubular body, and a drive mechanism for moving the rod in and out of the tubular body. The segment erector according to any one of claims 1 to 11, which is supported by the rod.