JP7281245B2 - Erector device, shield machine installed with same, and construction method of lining - Google Patents

Description

TECHNICAL FIELD The present invention relates to an erector device, a shield machine equipped with the erector device, and a method of constructing a lining.

A shield machine excavates the natural ground by rotating the cutter disc pressed against the face while stabilizing the face, and on the other hand, by assembling the segments brought in from the outside to the inner circumference of the excavation hole. It is a device that forms a tunnel.

In the excavation work, a plurality of jacks inside the machine are pressed against an annular lining body, which is a segment assembly, to advance the shield machine while taking reaction force, and the rear part of the shield machine is moved by the advance of the shield machine. A tunnel is formed by repeating the step of assembling a new segment with an erector device into a gap created between the tip of the excavation hole and the lining.

In the erector device, the postures of the gripped segment in the pitching direction, the rolling direction, and the yawing direction are controlled, and assembled to the existing segment.

Here, for example, Japanese Unexamined Patent Application Publication No. 2002-200000 describes the control of the posture in the yawing direction. In the technique described in Patent Document 1, the gripping portion of the segment is swingably attached to the erector body, and the rocking jack that connects the erector body and the gripping portion is installed on one side of the rocking fulcrum. there is The single swinging jack pushes and pulls the gripping portion of the segment to swing it.

JP-A-07-11899

In the technique described in Patent Document 1, the rocking jack is installed only on one side of the rocking fulcrum, so the rocking jack side becomes heavy and the weight balance deteriorates. As a result, there arises a problem that the periphery of the swinging fulcrum is unevenly worn as the gripping portion swings.

In order to eliminate such a problem, rocking jacks for rocking the gripping part are installed on both sides of the rocking fulcrum, and the gripping part is pushed by one rocking jack and pulled by the other rocking jack. It is conceivable to adopt a structure that controls In addition, since the gripping portion is pushed and pulled by the swinging jack, the connection with the erector main body at both ends of the swinging jack and the connection with the gripping portion are performed by pins to make it rotatable.

However, according to such a configuration, it is difficult to synchronize the pushing operation of one swinging jack and the pulling operation of the other swinging jack. cannot be oscillated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above technical background, and it is an object of the present invention to provide a technique capable of smoothly swinging a gripping portion of a segment.

In order to solve the above-mentioned problems, the erector device of the present invention according to claim 1 is an erector device that is provided in a shield machine and that constructs an annular lining body covering the inner peripheral surface of an excavation hole by assembling segments. The shield comprises an erector ring rotatably installed in a cylindrical shield frame, and arm portions provided at two locations across the center of rotation of the erector ring and extending in the axial direction of the shield frame. a pair of support means capable of reciprocating in a direction intersecting with the axial direction of the frame; a frame portion, a grip portion that is pivotably attached to the center of the frame portion to grip the segment, and a grip portion that is disposed on both sides of the swing fulcrum of the grip portion in the frame portion and pushes the grip portion with its tip end. A segment holding means having a pair of rocking jacks for rocking, and a jack operation part for extending one rocking jack of the pair of rocking jacks and setting the other rocking jack to a free-moving state. and .

According to a second aspect of the present invention, there is provided an erector device according to the first aspect of the invention , characterized in that the tip of the swinging jack is formed into a spherical surface.

According to a third aspect of the present invention, there is provided an erector device according to the first or second aspect of the invention, wherein the gripping portion is attached to the frame portion via a bearing so as to be capable of swinging. do.

According to a fourth aspect of the present invention, there is provided an erector apparatus according to any one of the first to third aspects of the invention, wherein the frame portion and the gripping portion are provided with a marker indicating the swinging state of the gripping portion. is formed.

According to a fifth aspect of the present invention, there is provided an erector device according to any one of the first to fourth aspects, wherein the gripping portion is provided coaxially with the swing fulcrum and is fitted into the segment. and a suspension part that engages with the anchor rod to suspend the segment, and pressing jacks that are arranged on both sides of the swing fulcrum and press the inner surface of the segment suspended by the suspension part. .

According to a sixth aspect of the present invention, there is provided an erector device according to the fifth aspect , wherein the anchor rod enters from the horizontal direction and the hanging portion engages a flange formed at the tip of the anchor rod. It is characterized by comprising an engaging groove that engages.

In order to solve the above-mentioned problems, the shield excavator according to claim 7 of the present invention includes a cylindrical shield frame in which a cutter head having a plurality of bits for excavating the ground is rotatably installed at the leading end in the traveling direction. , a partition wall fixed to the inner peripheral surface of the shield frame and partitioning the inside of the shield frame into a chamber side and a machine side; and a partition wall installed on the machine side of the partition wall. and an erector device as described.

In order to solve the above problems, the construction method of the lining of the present invention according to claim 8 is a construction method of a lining using the erector device according to any one of claims 1 to 6. Then, the axial insertion segment is gripped by the segment gripping means, the axial insertion segment is moved to the assembly position, one of the pair of swinging jacks is extended, and the other is in a free movement state to grip the segment. to adjust the posture of the axial insertion type segment to the shape of the assembly position, release the operation of the extended swing jack, and move the axial insertion type segment to the assembly position in the axial direction of the shield frame. characterized by inserting from

According to the present invention, there is no need to synchronize the pushing action of one swinging jack with the pulling action of the other swinging jack, so the grasping portion of the segment can be swung smoothly.
becomes possible.

1 is a configuration diagram of the inside of a rear body of a shield machine that is an embodiment of the present invention seen through from the side; FIG. It is the figure which looked at the erector apparatus provided in the shield machine of FIG. 1 from the back. 3 is an enlarged view showing a part of the frame portion of the erector device of FIG. 2; FIG. In the erector device of FIG. 2, (a) is a plan view when the gripping portion gripping the K-shaped segment is not swinging, and (b) is a view seen from the direction of line A in (a). In the erector device of FIG. 2, (a) is a plan view when the grasping part that grasps the K-shaped segment is swung by one of the swinging jacks, and (b) is a view seen from the direction of line B in (a). is. In the erector device of FIG. 2, (a) is a plan view when the gripping part gripping the K-shaped segment is rocked by the other rocking jack, and (b) is a view seen from the direction of line C in (a). is. FIG. 3 is a hydraulic circuit diagram of a swing jack installed in the erector device of FIG. 2; FIG. 3 is an explanatory view showing assembly of segments by the erector device of FIG. 2;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment as an example of the present invention will be described in detail below with reference to the drawings. In the drawings for describing the embodiments, in principle, the same components are denoted by the same reference numerals, and repeated description thereof will be omitted.

The shield machine M of the present embodiment shown in FIG. 1 injects viscous mud water into the earth and sand excavated by the cutter head and taken into the chamber to generate mud water pressure, and the mud water pressure is applied to the soil of the face. It is a slurry shield tunneling machine that constructs a borehole under pressure. The shield machine M has a cylindrical shield frame 11 composed of a front body (not shown) and a rear body 11a which are connected to each other via a connection body 10. As shown in FIG.

Although not shown, a cutter head equipped with a plurality of bits for excavating the ground is rotatably installed at the front end of the front body in the direction of travel. A partition wall is fixed to the shield frame 11 to separate the inside and the inside of the machine. A chamber is formed between the cutter head and the partition wall to take in the earth and sand excavated by the cutter head. The partition wall is also formed with a front end opening of a mud discharge pipe for discharging muddy water from the chamber and a front end opening of a water pipe for supplying viscous muddy water into the chamber.

As shown in FIG. 1, a lining body SL formed by annularly assembling segments S (FIGS. 2 and 4 to 6) is provided on the inner peripheral surface of the front end portion of the rear trunk portion 11a facing the rear of the shield frame 11. A ring girder 12 is installed to take the reaction force of a propulsion jack (not shown) for propelling the shield frame 11 forward by pushing it out. The ring girder 12 is provided with an erector device 13 for assembling the segments S to construct a lining body SL covering the inner peripheral surface of the excavation hole. Details of the erector device 13 will be described later.

A plurality of tail brushes 14 made of steel wires, urethane foam, or the like are arranged at intervals in the direction of travel on the inner peripheral surface of the rear end portion of the rear trunk portion 11a that constitutes the shield frame 11 in the direction of travel. are arranged in a ring. The tail brush 14 extends inward with a length that contacts the outer peripheral surface of the lining SL, and a sealing material is provided between the inner peripheral surface of the shield frame 11 and the outer peripheral surface of the lining SL. A sealed chamber 14a to be filled is formed.

1 and 2, the erector device 13 is supported by an erector ring 13a installed at the rear of the ring girder 12, a support unit (support means) 13b attached to the erector ring 13a, and a support unit 13b. A segment gripping unit (segment gripping means) 13c having a function of gripping the segment S is provided.

A gear 13aa is formed on the outer circumference of the erector ring 13a, and the gear 13aa is engaged with a drive gear 13da attached to the output shaft of an erector motor 13d installed in the ring girder 12, thereby driving the erector ring 13a. , in the circumferential direction of the shield frame 11 .

The support units 13b are provided at two locations on the left and right sides of the center of rotation of the erector ring 13a. The support unit 13b includes a support cylinder 13ba fixed to the erector ring 13a and open vertically, an arm portion 13bb extending in the axial direction of the shield frame 11, and one arm portion 13bb extending perpendicularly to the arm portion 13bb. and a rod 13bc fixed to the end and slidably fitted in the support cylinder 13ba.

A telescopic jack 13bd is mounted between the support tube 13ba and the arm portion 13bb to reciprocate the support unit 13b in a direction crossing the axial direction of the shield frame 11 by sliding the rod 13bc. Furthermore, a segment gripping unit 13c (specifically, a frame portion 13ca of the segment gripping unit 13c) is slidably fitted to the pair of left and right arm portions 13bb, so that the segment gripping unit 13c and the telescopic jack 13bd are connected. A slide jack 13be for reciprocating the segment gripping unit 13c along the arm portion 13bb is attached therebetween.

The frame portion 13ca of the segment gripping unit 13c has a shape curved downward when viewed from the front, and is installed across a pair of arm portions 13bb so as to be capable of reciprocating along the arm portions 13bb. ing. A gripping portion 13cb that grips the segment S is attached to the center of the frame portion 13ca so as to be able to swing.

Furthermore, a pair of rocking jacks 13cc whose tips push and rock the gripping portion 13cb are arranged on both sides of the rocking fulcrum of the gripping portion 13cb on the frame portion 13ca.

As shown in FIGS. 4(a) to 6(a), the tip of the swing jack 13cc is formed into a spherical surface. As a result, the tip of the swinging jack 13cc and the gripping portion 13cb come into point contact with each other, and the contact area between the two is reduced, thereby reducing the sliding resistance when the swinging jack 13cc pushes the gripping portion 13cb. In addition, it is possible to stably oscillate the gripping portion 13cb because earth and sand will not get caught between the rocking jack 13cc and the gripping portion 13cb and malfunction will not occur.

As shown in FIG. 3, a center pin 13cb1 forming a grip portion 13cb is fitted in the frame portion 13ca. The center pin 13cb1 is fitted through a bearing 13cd to reduce motion resistance during rocking. In this embodiment, the bearing 13cd is a self-aligning thrust roller bearing in which barrel-shaped convex rollers are obliquely arranged and the raceway surface of the housing washer is spherical to achieve alignment. .

1 and 2, the grip portion 13cb includes a suspension portion 13cb2 which is fixed to the center pin 13cb1 and provided coaxially with the swing fulcrum to suspend the segment S, and a suspension portion 13cb2 which is arranged on both sides of the swing fulcrum. A support jack (pressing jack) 13cb3 that presses the inner surface of the segment S suspended from the lower portion 13cb2 is provided. A total of four support jacks 13cb3 are arranged, two on each side of the swing fulcrum (see FIGS. 4(a) to 6(a)).

The suspension part 13cb2 engages with the anchor rod 15 fitted in the center of the inner surface of the segment S to suspend the segment S. It has an engaging groove for locking the formed flange 15a. Then, by pressing the inner surface of the segment S suspended by the suspending portion 13cb2 with the support jack 13cb3, the segment S is gripped while being restrained by the gripping portion 13cb.

As shown in FIGS. 4(b) to 6(b), the frame portion 13ca and the grip portion 13cb are formed with markers m1 and m2, respectively, which indicate the rocking state of the grip portion 13cb. When the frame portion 13ca is not rocked, the marker m1 of the frame portion 13ca overlaps the marker m2 of the grip portion 13cb (FIG. 4(b)). When the marker m2 of the gripping portion 13cb shifts in either direction with respect to the marker m1 of 13ca (FIGS. 5B and 6B), the rocking state of the gripping portion 13cb can be easily grasped. It's becoming

In this embodiment, as the pair of rocking jacks 13cc described above, single-acting hydraulic cylinders that apply hydraulic pressure when extending the piston rods are used. As shown in FIG. 7, the hydraulic circuit of these rocking jacks 13cc includes a solenoid valve B1, which is a 3-port, 2-position directional control valve connected to a pressure line L1 and a return line L2, and a rocking valve from the solenoid valve B1. It has a speed control valve B2 and a sequence valve B3 which are sequentially installed in the hydraulic line L leading to the jack 13cc.

When the solenoid of the electromagnetic valve B1 is not energized, the spring force holds the valve body in the neutral position, and the swing jack 13cc is connected to the return line L2 (state shown in FIG. 7). At this time, hydraulic pressure does not act on the cylinder chamber of the rocking jack 13cc, so the operation of the rocking jack 13cc is released. Further, when the solenoid of the electromagnetic valve B1 is energized, the valve body moves against the spring force to switch the path, and the swing jack 13cc is connected to the pressure line L1. As a result, hydraulic pressure acts on the cylinder chamber of the rocking jack 13cc to extend the piston rod.

Swinging of the gripping portion 13cb by the operation of the pair of swinging jacks 13cc will be described with reference to FIGS. 4 to 7. FIG.

When the solenoid of the solenoid valve B1 corresponding to any of the swinging jacks 13cc is not energized, the swinging jacks 13cc are deactivated and the piston rod does not push the grasping portion 13cb. , the grip portion 13cb does not swing.

Further, when the solenoid of the electromagnetic valve B1 corresponding to one of the swinging jacks 13cc is energized, the swinging jacks 13cc are actuated to extend the piston rod, and the gripping portion 13cb is pushed by the tip to swing. At this time, the solenoid of the solenoid valve B1 corresponding to the other rocking jack 13cc arranged on the opposite side of the rocking fulcrum is not energized, and the operation is released and becomes a no-load state, that is, a free-moving state. there is Therefore, when the piston rod of one swinging jack 13cc extends and the gripping portion 13cb swings, the gripping portion 13cb pushes the other swinging jack 13cc on the opposite side of the swinging fulcrum (free-moving state). The piston rod of the rocking jack 13cc) which is set is contracted.

Here, such a setting for the pair of swinging jacks 13cc (the solenoid of the electromagnetic valve B1 corresponding to one swinging jack 13cc is energized to extend the swinging jack 13cc, and the other swinging jack 13cc corresponds to The setting to put the swinging jack 13cc in a free-moving state without energizing the solenoid of the electromagnetic valve B1 is performed by operating a jack operation button (jack operation unit) (not shown). In the present embodiment, one of the pair of swinging jacks 13cc is extended by simply operating one jack operation button, and the other is set in a free-moving state, thereby improving convenience. It is However, a jack operation button corresponding to each rocking jack 13cc may be provided and set individually.

As a result, there is no need to synchronize the operations of the gripping portion 13cb by the pushing operation of one of the rocking jacks 13cc and the pulling operation of the other rocking jack 13cc. By operating either of the swinging jacks 13cc, the gripping portion 13cb can be swung in either the direction shown in FIG. 5 or the direction shown in FIG. Therefore, even when the heavy segment S is gripped, the grip portion 13cb can be smoothly swung.

Next, a method for constructing the lining SL using the erector device 13 having the above configuration will be described.

After the segment S conveyed from the starting shaft is gripped by the gripping portion 13cb of the segment gripping unit 13c in the manner described above, the erector ring 13a rotates in the circumferential direction of the shield frame 11, and the support unit 13b moves toward the shield frame 11. to the assembled position. The segment S is assembled by sliding the support unit 13b in the axial direction of the shield frame 11. As shown in FIG. Then, by repeating this series of operations a predetermined number of times, the segment S is assembled up to the state where the ring is simply closed.

Here, in the present embodiment, as shown in FIG. 8, the closing position (assembling position) of the rings constituting the lining body SL has a tapered shape in which the interval gradually narrows from the face side to the portal side. A forming segment S is used. In this case, a K-shaped segment Sk, which is an axially inserted segment, is used as the last segment for closing the ring to complete the lining body SL.

Now, since the closed position of the ring is a portion where assembly errors of the segments S are accumulated, the tapered shape at that position is not necessarily straight with respect to the axial direction of the shield frame 11 . Therefore, when inserting the K-segment Sk, it is necessary to adjust the posture to the shape of the closed position, which is the assembly position. Therefore, the K-segment Sk is assembled as follows, and finally the lining body SL is constructed.

That is, similarly to the other segments S, the K-shaped segment Sk is gripped by the gripping portion 13cb of the segment gripping unit 13c, then the erector ring 13a turns in the circumferential direction of the shield frame 11, and the support unit 13b moves toward the shield frame 11. to the assembled position (ie, the ring closed position). Next, the jack operation button is operated to extend one of the pair of rocking jacks 13cc described above, and the other is placed in a free-moving state, thereby rocking the gripping portion 13cb, and changing the attitude of the K-shaped segment Sk to that of the ring. Match the shape of the closed position. That is, it is confirmed in which direction the closed position of the ring is inclined with respect to the axial direction of the shield frame 11, and the gripping portion 13cb is swung in the direction shown in FIG. Tilt in that direction.

At this time, as described above, there is no need to synchronize the pushing action of one swinging jack 13cc and the pulling action of the other swinging jack 13cc, so the heavy segment S (here, K-shaped segment Sk ), the grip portion 13cb can be smoothly swung. Further, since the tip of the swinging jack 13cc is formed into a spherical surface, the contact area between the swinging jack 13cc and the gripping portion 13cb is small, and the sliding resistance when the swinging jack 13cc pushes the gripping portion 13cb is reduced. It is also possible to stably swing the gripping portion 13cb because earth and sand will not get caught between the rocking jack 13cc and the gripping portion 13cb and malfunction will not occur.

When the closed position of the ring is not tilted, as shown in FIG. 4, the gripping portion 13cb is not swung by the swinging jack 13cc.

After the posture of the K-segment Sk is adjusted to the closed position of the ring in this way, the operation of the extended rocking jack 13cc is released. As a result, the grasping portion 13cb that grasps the K-shaped segment Sk is released from the state of being pushed by the swinging jack 13cc while maintaining the swinging posture. By sliding the support unit 13b in the axial direction of the shield frame 11, the K-shaped segment Sk is inserted between the existing segments S, which are the ring closing positions, to construct the lining SL.

As described above, the invention made by the present inventor was specifically described based on the embodiment, but the embodiment disclosed in this specification is an example in all respects, and is limited to the technology disclosed. not a thing That is, the technical scope of the present invention should not be construed in a restrictive manner based on the description of the above embodiments, but should be construed according to the description of the scope of claims. All modifications are included as long as they do not deviate from the description technology and equivalent technology and the gist of the claims.

For example, in the present embodiment, the K-shaped segment Sk that is inserted into the closed position is applied as an example of the axially inserted segment. Axial-entry segments may also be applied. The hexagonal segment is a segment having long-side joints formed opposite to each other and V-shaped inclined joints protruding from both sides of the long-side joints. A tunnel covering the inner peripheral surface of the excavated hole is constructed by arranging them toward the front and rear of the hole and assembling them in a staggered manner.

Further, in the present embodiment, a single-acting hydraulic cylinder is used as the swinging jack 13cc. If possible, actuators other than those shown in this embodiment may be used. For example, a double-acting hydraulic cylinder may be used, and a 4-port 3-position directional control valve may be used as the solenoid valve.

In the above description, the case where the present invention is applied to a mud type shield machine is shown, but it is not limited to this, and various closed type shield machines such as a mud pressure type shield machine can be applied. can be applied to

11 shield frame 11a rear body 12 ring girder 13 erector device 13a erector ring 13aa gear 13b support unit 13ba support cylinder 13bb arm 13bc rod 13bd telescopic jack 13be slide jack 13c segment grip unit 13ca frame 13cb grip 13cb1 center pin 13cb2 suspension part 13cb3 Support jack 13cc Rocking jack 13cd Bearing 13d Erector motor 13da Drive gear 15 Anchor rod 15a Flange B1 Solenoid valve B2 Speed control valve B3 Sequence valve L Hydraulic line L1 Pressure line L2 Return line M Shield machine S Segment SL Lining body Sk K type segment (axial insertion type segment)
m1, m2 markers

Claims (8)

An erector device provided in a shield machine for constructing an annular lining body covering an inner peripheral surface of an excavation hole by assembling segments,
an erector ring rotatably installed in a cylindrical shield frame;
a pair of support means provided at two locations on either side of the center of rotation of the erector ring and having arm portions extending in the axial direction of the shield frame and capable of reciprocating in a direction intersecting the axial direction of the shield frame; ,
A frame portion installed to straddle the arm portions of the pair of support means and capable of reciprocating along the pair of arm portions; and segment gripping means comprising a pair of rocking jacks arranged on both sides of the rocking fulcrum of the gripping portion in the frame portion to push and rock the gripping portion with their tips;
a jack operation unit that extends one of the pair of swing jacks and sets the other swing jack to a free-moving state;
An erector device comprising: The tip of the swing jack is formed into a spherical surface,
2. The erector apparatus according to claim 1, wherein: The grip portion is swingably attached to the frame portion via a bearing,
3. The erector device according to claim 1 or 2, characterized in that: A marker indicating a swinging state of the grip is formed on the frame and the grip.
The erector device according to any one of claims 1 to 3, characterized in that: The gripping part is
a suspension part provided coaxially with the swing fulcrum and engaging with an anchor rod fitted in the segment to suspend the segment;
pressing jacks arranged on both sides of the swinging fulcrum for pressing the inner surface of the segment suspended from the suspended portion;
The erector device according to any one of claims 1 to 4, characterized in that it has : The hanging portion has an engaging groove for engaging the flange formed at the tip of the anchor rod when the anchor rod enters from the horizontal direction.
6. The erector device according to claim 5 , characterized in that: A cylindrical shield frame in which a cutter head equipped with a plurality of bits for excavating the ground is rotatably installed at the tip in the traveling direction;
a partition fixed to the inner peripheral surface of the shield frame and partitioning the inside of the shield frame into a chamber side and a machine side;
The erector device according to any one of claims 1 to 6, which is installed on the inside of the partition wall;
A shield machine characterized by having A method for constructing a lining using the erector device according to any one of claims 1 to 6,
gripping the axial entry type segment with the segment gripping means;
moving the axial entry segment to an assembled position;
one of the pair of swinging jacks is extended and the other is set in a free-moving state to swing the gripping portion so that the posture of the axial insertion type segment is adjusted to the shape of the assembly position;
releasing the extended rocking jack and inserting the axially inserted segment into the assembly position from the axial direction of the shield frame;
A method of constructing a lining body characterized by:

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