JP2019173364A - Shield machine and method for processing boulder - Google Patents

Abstract

To provide a shield machine 1 for facilitating processing (crushing or recovery) of boulders that are taken into the chamber 5 between the cutter head 3 and the partition 4 and cannot be discharged from the discharge port 12 by the soil removal device 13.SOLUTION: A processing port 21 which is provided in a partition wall 4 so as to be positioned above a discharge port 12 in the circumferential direction and a valve 22 for opening and closing the treating port 21 are provided. Also, rod members 23 of a cutter head side, that can be moved into and out of a chamber 5 from a cutter head 3 and can move boulders in the chamber 5 forward of the processing port 21 by rotating the cutter head 3 are provided. The processing port 21 is used for crushing the boulder moved forward (crushing by a rock drill) or for recovery.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a shield machine, and more particularly, to a shield machine having a boulder processing device taken into a chamber behind a cutter head, and a boulder processing method in the shield machine.

The term “big boulder” as used herein is a generic term for large gravel, cobblestones or boulders taken together with excavated earth and sand, and hard masses such as rock masses. The thing of 0.5-2m class is assumed.
In addition, the “processing of boulders” includes at least crushing boulders so that they can be discharged by a soil removal device, or collecting boulders by a separate route from the soil removal device and carrying them out.

  In the shield machine, the earth and sand excavated by the cutter head is taken into the chamber formed between the cutter head and the partition wall behind it from the opening provided in the cutter head, and then opened to the lower part of the partition wall. The tunnel is excavated from the discharged discharge port while discharging toward the outside of the machine by a soil discharging device such as a screw conveyor disposed behind the partition wall.

When excavating ground containing boulders, boulders that have not been crushed by the cutter head may be taken into the chamber together with excavated earth and sand from openings provided in the cutter head. The excavated earth and sand are discharged by the earth removing device, but the 0.5-2 m class boulders cannot be discharged by the earth removing device as they are.
Therefore, as described in Patent Literature 1 and Patent Literature 2, devices have been proposed that can crush boulders in a chamber and discharge them together with excavated earth and sand.

  In the apparatus described in Patent Document 1, the cutter head is movable rearward, and boulders are sandwiched and fixed between the cutter head and the partition wall. Alternatively, the agitation blade (rod) on the cutter head side can be expanded and contracted, and boulders are sandwiched and fixed between the tip of the agitation blade and the partition wall. And the fixed boulder is crushed with a rock drill. Two rock drills are provided on both the left and right sides of the partition outlet (the stagnation mouth of the earth removing device), and each blade portion is capable of extending and contracting obliquely toward the boulder.

In the apparatus described in Patent Document 2, a pair of left and right guide plates that guide the boulders taken into the chamber toward the front of the discharge port are provided, and the boulders are dropped between the guide plates just before the discharge port. Then, the boulders positioned and held between the guide plates are crushed by a rock drill that protrudes from the left and right guide plates.
Alternatively, a pair of left and right gravel displacement prevention rods that can protrude into the chamber from the left and right sides of the discharge port in the partition wall are provided, and the boulders taken into the chamber are enclosed from both sides in the tunnel width direction immediately before the discharge port. Include. The boulders positioned and held between the rods are crushed by a gravel crushing cutter (disc cutter) provided on the cutter head side.

JP 2007-327246 A JP 2017-141590 A

  The devices described in Patent Documents 1 and 2 each have a configuration in which a boulder is positioned and held in front of an outlet of a partition wall (a stagnation mouth of a soil removal device) and crushed by a rock drill or the like.

However, since a soil removal device or the like is installed near the discharge port of the partition wall, the space for installing a boulder processing device (such as a rock drill) is scarce and it cannot be said that it is a position that can be easily processed.
That is, as described in Patent Document 1, when rock drilling from the partition wall side, there is no choice but to rock diagonally from the left and right sides of the discharge port, the protruding length of the rock drilling machine becomes large, It cannot be said that rock drilling is easy.

  Furthermore, since a crushing device is installed in the vicinity of the discharge port, the sediment discharge flow path is restricted, so that there is a concern that the excavated soil will be blocked and the excavation becomes impossible.

  Patent Document 1 and Patent Document 2 also describe crushing by a rock drill or disc cutter provided in the chamber or on the cutter head side, not from the partition side. Compared to, it is difficult to control delicately for crushing because it is out of the human hands.

  The present invention has been made in view of such a situation, and facilitates processing of boulders in a shield machine by moving the boulders in the chamber to a position away from the partition outlet. The task is to do.

  The shield machine according to the present invention includes a tubular machine main body, a rotatable cutter head disposed at a front end portion of the main body, a partition wall disposed in the main body behind the cutter head, A chamber formed between the cutter head and the partition wall for storing earth and sand excavated by the cutter head, and the earth and sand stored in the chamber are discharged from the discharge port opened to the partition wall toward the outside of the machine. A soil removal device is provided.

The shield machine according to the present invention also includes, as a processing apparatus for boulders taken into the chamber, a processing port opened in the partition wall at a position above the discharge port in the circumferential direction, and the processing port. A valve that opens and closes, and a cutter head-side rod member that can move into and out of the chamber from the cutter head and can move boulders in the chamber to the front of the processing port by rotation of the cutter head. .
The processing port is used for crushing or collecting boulders moved forward.

The present invention also provides a method for treating boulders when the boulders are taken into the chamber in the shield machine.
The boulder processing method according to the present invention includes the following steps (1) to (3).
(1) A cutter head side rod member is protruded from the cutter head into the chamber.
(2) By rotating the cutter head, the boulder in the chamber is opened from the front of the discharge port to the partition wall in the circumferential direction above the discharge port by the cutter head side rod member. Move to the front of the treatment port.
(3) A rock drill is inserted into the chamber from the processing port to crush boulders.

  Instead of the step (3) of crushing boulders, a step of collecting boulders from the treatment port may be included.

  According to the present invention, the processing port is provided at a position that is easy to process in the circumferential upper direction away from the discharge port of the partition wall, and the boulders in front of the discharge port are moved to the front of the processing port by using the rotation of the cutter head. Therefore, it is possible to facilitate the processing (crushing or recovery) of boulders.

The front view and side sectional view of a shield machine according to an embodiment of the present invention Front view and side cross-sectional view of shield machine showing boulder processing equipment Explanatory diagram of boulder processing step 1 Explanatory drawing of boulder processing step 2 Explanatory drawing of boulder processing step 3 Explanatory drawing of boulder processing step 4 The figure which shows the concrete example of composition of the processing mouth and rock drill in the case of boulder crushing processing Figure showing the set-up procedure of a rock drill The figure which shows the specific structural example of the process port and the collection | recovery apparatus in the case of a boulder collection process

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1: is the front view (A) and side sectional drawing (B) of the shield machine which concerns on one Embodiment of this invention.

  The shield machine 1 of this embodiment includes a cutter head 3 at the front end (face side) of a cylindrical machine 2 and a partition wall (bulk head) 4 in the body 2 behind the cutter head 3. I have. A chamber 5 is defined between the cutter head 3 and the partition wall 4.

  The cutter head 3 is a spoke type, a rotation center shaft 3a on the extension of the center axis of the excavator main body 2, an outer peripheral ring 3b having substantially the same diameter as the excavator main body 2 (slightly larger diameter than the main body 2), And a plurality of cutter spokes 3c extending radially from the rotation center shaft 3a toward the outer ring 3b. The cutter pork 3c has a number of cutter bits 3d on its front and side surfaces.

  In the spoke-type cutter head 3, an opening 3e for taking excavated earth and sand into the chamber 5 is formed between adjacent cutter spokes 3c. Further, in the opening 3e, a support member (not shown) that connects and reinforces adjacent cutter porks 3c at a radial intermediate position is appropriately disposed.

The rotation center shaft 3 a of the cutter head 3 extends rearward and is rotatably supported by the center portion of the partition wall 4.
The partition wall 4 also rotatably supports the swivel ring 6 around the bearing portion of the rotation center shaft 3a. Each cutter spoke 3c of the cutter head 3 is connected to the swivel ring 6 via a support arm 7 on the rear surface side. Thereby, the cutter head 3 is rotated by the rotation of the swivel ring 6.

  A ring gear 8 is integrally attached to the swivel ring 6 behind the partition wall 4. The ring gear 8 is meshed with pinion gears 10 attached to the output shaft of a motor 9 that is arranged in the circumferential direction.

Accordingly, the cutter head 3 rotates with the swivel ring 6 using the motor 9 as a drive source, and excavates natural ground.
The partition wall 4 is also provided with a rotary joint 11 for connecting the device on the cutter head 3 side and the device behind the partition wall 4 with a hydraulic circuit or an electric circuit.

  The shield machine 1 according to the present embodiment includes a cylindrical machine main body 2, and the main body 2 has a circular cross-sectional shape, but may be oval or rectangular as long as it is cylindrical. As long as it can be rotated, the tunnel can be dug.

  In the chamber 5 between the cutter head 3 and the partition wall 4, excavated earth and sand are taken in through the opening 3 e by excavation of natural ground by the cutter head 3, and the earth pressure is generated.

The partition 4 has a discharge port 12 for excavated earth and sand in the chamber 5 at the lower part (lowermost position).
The earth discharging device 13 is disposed behind the partition wall 4 and discharges the earth and sand accumulated in the chamber 5 from the discharge port 12 opened in the partition wall 4 toward the outside of the machine.

As the earth removing device 13, a screw conveyor is generally used, and the stagnation port is connected to the discharge port 12. Also, as a screw conveyor, a ribbon type that has a large diameter and does not have a central axis so that relatively large gravel can be rounded, that is, a ribbon-shaped feed blade on the inner periphery of a rotating casing pipe Are preferably used.
The earth removal device 13 also controls the earth pressure in the chamber 5 simultaneously with the discharge of the excavated earth and sand in the chamber 5 to prevent the face from collapsing.

The shield machine 1 according to the present embodiment also has an intermediate folding mechanism in order to be able to cope with the excavation of a curved tunnel.
That is, the cylindrical excavator main body 2 is divided into a front cylinder 2 a and a rear cylinder 2 b behind the partition wall 4. Then, as a middle folding mechanism, a wrap portion 14 is formed by wrapping the rear end portion of the front barrel 2a and the front end portion of the rear barrel 2b so that the front barrel 2a is outside and the rear barrel 2b is bendable. A hydraulic connection jack 15 that connects the front cylinder 2 a and the rear cylinder 2 b before and after the lap portion 14 is provided.

A plurality of connection jacks 15 are arranged at predetermined intervals in the circumferential direction of the front cylinder 2a and the rear cylinder 2b, and connect the front cylinder 2a and the rear cylinder 2b so as to be extendable and contractable in the axial direction.
When the shield machine 1 is bent, the bent side connecting jack is contracted from the neutral position, and the opposite side connecting jack is extended from the neutral position, whereby the front cylinder 2a and the rear cylinder 2b are bent.

The excavator main body 2 (rear trunk 2b) includes an erector 16 that assembles and covers the segment SG inside the partition 4 rearward.
The erector 16 has a gripping portion 16a that grips the segment SG, and moves the segment SG in the tunnel axial direction, the radial direction, and the circumferential direction while gripping the segment SG, and sets the segment SG at a predetermined position. Thus, a plurality of segments SG are assembled in the circumferential direction to form a segment ring, and connected to the formed segment ring to construct a cylindrical lining body.

The excavator main body 2 (rear barrel 2b) is also provided with a hydraulic propulsion jack 17 as a propulsion mechanism that advances the shield excavator 1 together with excavation.
A plurality of the propulsion jacks 17 are arranged on the inner peripheral surface of the rear barrel 2b at substantially equal intervals in the circumferential direction, and generate thrust by pushing the end surface of the segment SG that has been covered.
If one ring is excavated by extension of the propulsion jack 17, the jack is returned to cover one ring. Therefore, excavation and lining are repeated for each ring.

The excavator main body 2 (rear barrel 2b) is also provided with a tail seal 18 on the inner peripheral surface of the rear end thereof.
Since the segment SG is assembled in the rear cylinder 2b, the outer diameter of the segment SG that has been covered is smaller than the inner diameter of the rear cylinder 2b. For this reason, a gap is formed between the inner peripheral surface of the rear end portion of the rear cylinder 2b and the segment SG that has been covered. Therefore, the tail seal 18 is provided so that groundwater and earth and sand do not enter the machine (in the shield machine 1) from this gap. The tail seal 18 is in slidable contact with the outer periphery of the segment SG that has been covered to close the gap.

  A relatively large gap is formed between the inner peripheral surface of the tunnel excavated by the cutter head 3 and the outer peripheral surface of the segment SG that has been covered. This gap is filled with backfilling injection material at an appropriate timing.

Next, a processing apparatus (and processing method) for boulders that can be taken into the chamber 5 during excavation of ground containing boulders will be described.
FIG. 2 is a front view (A) and a side sectional view (B) of the shield machine showing the boulder processing apparatus.

In addition to the discharge port 12, the partition wall 4 is positioned above the discharge port 12 in the circumferential direction, and the processing port 21 is opened.
The “circumferential direction” here refers to the rotational direction of the cutter head 3. “Upper” means that it is positioned higher than the discharge port 12 by being positioned downstream of the discharge port 12 positioned in the lowermost part of the partition wall 4 (chamber 5) in the rotational direction. The boulders to be processed (crushed) gather near the lowermost discharge port 12 of the chamber 5 and are moved and processed in the circumferential direction (the rotation direction of the cutter head 3). It is above the outlet 12 on the downstream side of the outlet 12 in the rotational direction.

  Specifically, the discharge port 12 is formed at the lowest position at 6 o'clock of the partition wall 4 in the rotation direction of the cutter head 3, while the processing port 21 is discharged in the rotation direction of the cutter head 3. It is formed at a position between 6 o'clock and 9 o'clock at a position away from 12 (a position that does not overlap). In other words, when the position of the discharge port 12 is 0 °, the processing port 21 is formed at a position in the range of 0 ° to 90 °, practically 5 ° to 45 °.

  The processing port 21 is provided with a valve 22 that opens and closes the processing port 21. During normal excavation, the processing port 21 is closed by the valve 22.

A rod member 23 that can be moved into and out of the chamber 5 is provided on at least one of the cutter spokes 3 c of the cutter head 3.
It is preferable that a plurality (about 2 to 3) of rod members 23 are arranged in a longitudinal direction (radial direction) of the cutter pork 3c at a position near the outer end of the cutter pork 3c.

Each rod member 23 takes a position (immersion position) accommodated in the cutter pork 3c and a position (projection position) protruding into the chamber 5 from the back surface of the cutter pork 3c by a jack built in the cutter pork 3c. Can do.
Thereby, when the rod member 23 rotates integrally with the cutter head 3 in the protruding state, when there is a boulder in the excavated sediment in front of the discharge port 12 in the chamber 5, the rod member 23 comes into contact with the boulder from the side, The boulders in the excavated earth and sand can be moved from the front of the discharge port 12 to the front of the treatment port 21. Since the excavated earth and sand in the chamber 5 escapes from between the rod members 23 and stays as they are, only the boulders can be moved.

Further, the partition wall 4 is provided with a rod member 24 capable of appearing and retracting in the chamber 5 at a position above the processing port 21 in the circumferential direction and adjacent to the processing port 21.
It is preferable that a plurality (2 to 3) of rod members 24 be provided in a radial direction at positions near the outer periphery of the partition wall 4.

Each rod member 24 can take a position housed in the partition wall 4 (or a position behind the partition wall 4) and a position protruding into the chamber 5 from the front surface of the partition wall 4 by a jack built in the partition wall 4.
Thereby, the rod member (partition wall side rod member) 24 on the partition wall 4 side is moved to the front of the processing port 21 by the rod member (cutter head side rod member) 23 on the cutter head 3 side in the protruding state. Can be sandwiched (positioned and held in the circumferential direction) in cooperation with the cutter head side rod member 23.

  Here, the processing port 21 is opened by the valve 22 during the processing of boulders, moved to the front of the processing port 21 by the cutter head side rod member 23, and is cut by the cutter head side rod member 23 and the partition wall side rod member 24. It is used for crushing the boulders sandwiched and held by the rock drill 25.

  Next, boulder crushing processing by the boulder processing apparatus will be described with reference to FIGS.

FIG. 3 is an explanatory diagram of boulder processing step 1 (at the start of boulder processing).
FIG. 3 shows a state in which the boulder K is taken into the chamber 5 and is located in front of the discharge port 12 and cannot be discharged by the soil discharging device (screw conveyor) 13. Such a state can be detected from torque fluctuations of the cutter head 3 and the earth removal device 13. The boulder treatment starts with this detection.

The rotation position of the cutter head 3 when the boulder K is detected (particularly the rotation position of the cutter pork having the cutter head side rod member 23 among the plurality of cutter spokes 3c) is indefinite.
Therefore, as a preparation for moving the boulder K, first, the angle of the cutter head 3 is adjusted. That is, as shown in FIG. 3, the cutter head 3 is rotated at a low speed, and the cutter spoke having the cutter head side rod member 23 is positioned in the vicinity of the discharge port 12 on the upstream side in the rotation direction.

FIG. 4 is an explanatory diagram of the boulder processing step 2.
Here, the cutter head side rod member 23 is projected into the chamber 5 from the back surface of the cutter head 3.
Further, the partition wall side rod member 24 is protruded from the front surface of the partition wall 4 into the chamber 5 (and further into the opening 3e between the cutter spokes).
In this state, the boulder K in front of the discharge port 12 in the chamber 5 is assumed to be between the cutter head side rod member 23 and the partition wall side rod member 24.

FIG. 5 is an explanatory diagram of the boulder processing step 3.
The cutter head 3 is rotated at a slow speed. That is, the cutter head 3 is rotated at a speed sufficiently lower than the rotation speed during normal excavation.
Thereby, the cutter head side rod member 23 rotates integrally, abuts the boulder K in front of the discharge port 12 in the chamber 5 from the side, and moves the boulder K from the front of the discharge port 12 to the upper circumferential direction (processing). (Toward the front of the mouth 21).

  Then, when the boulder K moves to the front of the processing port 21, the boulder K comes into contact with the partition wall side rod member 24. As a result, the boulder K is sandwiched and held between the cutter head side rod member 23 and the partition wall side rod member 24.

  The rod members 23 and 24 may be provided with a sensor capable of detecting a lateral load, such as a strain sensor. By monitoring the value of this sensor, it is possible to detect whether or not boulders are sandwiched.

Further, the angle difference between the rod members 23 and 24 can be determined from the rotation angle of the cutter head 3 when the boulder K is sandwiched between the rod members 23 and 24, and the approximate size of the boulder K can be detected. can do.
Conversely, if the cutter head 3 rotates until the angle difference between the rod members 23 and 24 becomes zero, it can be determined that there is no boulder.

FIG. 6 is an explanatory diagram of the boulder processing step 4.
In a state where the boulders K are held in front of the processing port 21 of the partition wall 4, the processing port 21 is opened by a valve 22 (not shown in FIG. 6). And the rock drill 25 as a boulder crushing device is inserted and set in the processing port 21 from the work place behind the partition wall 4. Thereby, the rock drill 25 is brought into the chamber 5, and the boulder K is crushed by the rock drill 25.
As the rock drill 25, a boring machine type rotary rock drill that drills holes by rotating a rod (drill) with a bit attached to the tip can be used in addition to the impact rock drill.

After crushing the boulder, the cutter head 3 is further rotated at a low speed to check the crushing condition of the boulder.
If the boulders are crushed to a size that can be swallowed by the earth removal device (screw conveyor) 13, the rock drill 25 is removed, the valve 22 is closed, the rod members 23 and 24 are retracted, and the excavation is performed. Resume.
When crushing the boulders is insufficient, the rock drill 25 will repeatedly hit and drill holes. When the strength of boulders is high, it is also effective to insert a static crushing machine or the like into the drill hole and crush it.

FIG. 7 shows a more specific configuration example of the processing port and rock drill in the case of boulder crushing processing.
The processing port 21 of the partition wall 4 includes a cylindrical portion 21a that extends to the rear of the partition wall 4 and a rock drill set facility 30 is provided in and behind the cylindrical portion 21a.

  The rock drill set equipment 30 allows the rock drill 25 to be inserted in a watertight state and swingable, and a main body 31 attached so as to close the opening end on the rear side in the extending direction of the cylindrical portion 21a. And a pipe-shaped member 32 that penetrates the main body 31 and is supported by the main body 31 so as to be tiltable.

  The pipe-shaped member 32 has a spherical surface 32 a on the outer peripheral side of the front end portion thereof, and is rotatably supported by a spherical bearing formed at the center of the main body 31. Accordingly, the pipe-shaped member 32 can tilt in any direction around the center point O of the spherical surface 32a on the front end side.

  The inside of the pipe-shaped member 32 forms a straight rod through hole 32b extending from the front end portion to the rear end portion. The rod through hole 32b serves as an insertion path for the rock drilling rod 25a of the rock drill 25.

  A ball valve 33 is provided inside the longitudinal intermediate portion of the pipe-shaped member 32. In the present embodiment, the ball valve 33 corresponds to the aforementioned “valve 22 for opening and closing the processing port 21”, and opens and closes the insertion path (rod through hole 32b) of the rock drilling rod 25a.

  The ball valve 33 is rotated by 90 ° by operating the opening / closing lever 34, thereby switching between an open position where the valve hole coincides with the rod through hole 32b and a closed position where the valve hole intersects the rod through hole 32b. Can do.

  On the rear end side of the pipe-shaped member 32, the rod passage hole 32b is expanded in diameter, and is expanded and contracted by air pressure as a seal member for inserting the rock drilling rod 25a in a watertight state on the inner peripheral side of the expanded diameter portion. A possible packer 35 is equipped.

  The pipe-shaped member 32 of the present embodiment is constructed by drawing all of the spherical surface 32a, the valve 33, and the packer 35 as an integrated object. It may be.

FIG. 8 shows a procedure for setting the rock drill 25.
First, as shown in FIG. 8A, with the ball valve 33 closed, the tip of the rock drilling rod 25a of the rock drill 25 is inserted into the rod through hole 32b of the pipe-shaped member 32 and is in a contracted state. Pass through the packer 35 and pull it up to just before the ball valve 33.

  Next, as shown in FIG. 8B, the packer 35 is inflated with air pressure or the like, and the insertion portion of the rock drilling rod 25a is sealed in a watertight state.

  Next, as shown in FIG. 8C, the ball valve 33 is rotated 90 ° by the lever 34 and opened. In other words, the valve hole of the ball valve 33 is aligned with the rod through hole 32 b of the pipe-like member 32. Thereby, the further drilling of the rock drill rod 25a of the rock drill 25 can be performed. Therefore, the tip of the rock drilling rod 25 a of the rock drill 25 is drawn through the valve hole of the ball valve 33 and protrudes into the chamber 5 from the front end portion of the pipe-shaped member 32. Thereby, the boulder K in front of the processing port 21 can be crushed.

In this state, as shown in FIG. 8D, the rock drill 25 can be swung. That is, the rock drill 25 can be swung in any direction around the point O shown in the figure, and drilling or the like can be performed at an optimum position according to the state of boulders.
Further, by always sealing with the packer 35, the rock drilling operation can be performed while suppressing the inflow of earth and sand or groundwater into the machine.

  According to the present embodiment, the processing port 21 that is opened in the partition wall 4 of the shield machine 1 and positioned above the discharge port 12 in the circumferential direction, and the valve 22 (ball valve 33) that opens and closes the processing port 21; A cutter head-side rod member 23 that can move into and out of the chamber 5 from the cutter head 3 and can move boulders in the chamber 5 forward of the processing port 21 by rotating the cutter head 3. A rock drill 25 can be set in the mouth 21 to crush boulders.

In this way, the processing port 21 is provided at a position in the circumferential direction above the partition wall 4 where the processing port 21 is easy to be processed. Since it is crushed after moving to, the crushing process of boulders can be facilitated.
That is, since the space for installing the crushing mechanism cannot be taken near the discharge port 12 of the partition wall 4 (the stagnation port of the soil removal device 13), it can be moved to a position away from the discharge port 12 to be crushed. .

  In addition, according to the present embodiment, the partition-side rod member 24 that can be projected and retracted from the partition wall 4 into the chamber 5 is further provided above the processing port 21 in the circumferential direction, and the cutter head-side rod member 23 is When the boulders in the chamber 5 are moved to the front of the processing port 21 by the rotation, the boulders are surrounded by the partition wall side rod member 24, so that the boulders are surrounded by the front of the processing port 21. Positioning and holding in the direction can be performed, and crushing by the rock drill 25 can be ensured.

  In addition, according to the present embodiment, the processing port 21 includes the rock drill set equipment 30 that allows the rock drill 25 to be inserted in a watertight state and can be swung. Thereby, rock drilling work can be performed in an optimum posture with respect to the target while preventing intrusion of earth and sand and groundwater when the rock drill 25 is used.

  Further, according to the present embodiment, the rock drill set equipment 30 includes a main body 31 that closes the processing port 21, and penetrates the main body 31 and is tiltably supported by the main body 31. A pipe-shaped member 32 that can be inserted through 25a and a seal member (packer 35) that is provided on the inner periphery of the pipe-shaped member 32 and allows the rock drilling rod 25a to be inserted in a watertight state. Thereby, a necessary swing function and a sealing function can be obtained reliably.

  Further, according to the present embodiment, the valve 22 for opening and closing the processing port 21 is provided inside the pipe-shaped member 32 and opens and closes the insertion path of the rock drilling rod 25a. Thereby, the rock drill set equipment 30 can have a valve function.

  In this embodiment, one rock drill 25 is set in one processing port 21, but a plurality of rock drills 25 can be set in one processing port 21 (for example, arranged in the circumferential direction). Also good. In this case, the rock drill set equipment 30 (pipe-like member 32, ball valve 33 and packer 35) of FIG. 7 may be provided for each rock drill 25.

  In the present embodiment, the ball valve 33 is provided on the pipe-shaped member 32 of the rock drill set equipment 30 as a valve for opening and closing the processing port 21, but instead of this, or in combination with this, You may make it provide the gate valve (refer 38 of FIG. 9 mentioned later) in the forefront position of the cylindrical part 21a of the process port 21. FIG.

Next, an embodiment of FIG. 9 will be described as another embodiment of the present invention.
In the present embodiment, the boulder K moved to the front of the processing port 21 is drawn into the processing port 21 and collected. Therefore, the processing port 21 is made larger than the assumed boulder size.

In FIG. 9, the processing port 21 of the partition wall 4 includes a cylindrical portion 21 a that continues to the rear of the partition wall 4, and a gate valve 38 is provided on the front side (frontmost position) of the cylindrical portion 21 a in the extending direction.
In the present embodiment, the gate valve 38 corresponds to the aforementioned “valve 22 for opening and closing the processing port 21”.

The collection facility 40 collects boulders and collects them behind the gate valve 38 in the cylindrical portion 21a.
Therefore, the site | part of the extending direction rear side of the cylindrical part 21a is a boulder drawing space, and the main piston 41 is arrange | positioned so that sliding is possible in the front-back direction. The main piston 41 is connected to a sub piston 43 through a piston rod 42, and a hydraulic chamber 44 is formed to urge the sub piston 43 leftward in the drawing.

  During normal excavation, hydraulic pressure is applied to the hydraulic chamber 44, and the main piston 41 is in a position immediately after the gate valve 38 (a dotted line position in the drawing).

  The collection facility 40 also includes an opening 45 formed on the upper surface side of the retracting space of the cylindrical portion 21a. This opening 45 is an opening for taking out boulders from the cylindrical portion 21a, and is closed by a detachable lid member 46 except when taking out.

A procedure for collecting boulders in the embodiment of FIG. 9 will be described.
In a state where the boulders K are held in front of the processing port 21 of the partition wall 4, the processing port 21 is opened by the gate valve 38.

  Then, by releasing the hydraulic pressure of the hydraulic chamber 44, the main piston 41 is moved to the right in the figure by the earth pressure on the chamber 5 side, and accordingly, the boulders K in the chamber 5 are moved into the cylindrical portion 21a. Into.

  After the boulder K is drawn into the cylindrical portion 21a, the processing port 21 is closed by the gate valve 38. Then, the lid member 46 of the opening 45 on the upper surface side of the cylindrical portion 21a is removed, the boulders K in the cylindrical portion 21a can be lifted from the openings 45, and the boulders K are collected by an appropriate lifting operation.

  According to the present embodiment, the processing further includes the cylindrical portion 21a that extends to the rear of the partition wall 4 connected to the processing port 21, and the recovery facility 40 that draws and collects boulders into the cylindrical portion 21a. The boulders can be recovered using the mouth 21.

In this way, the processing port 21 is provided at a position in the circumferential direction above the partition wall 4 where the processing port 21 is easy to be processed. Since it collects after moving to a boulder, collection processing of boulders can be facilitated.
That is, the space near the discharge port 12 of the partition wall 4 (the stagnation port of the soil removal device 13) does not have a space for installing a recovery mechanism. .

  Unlike the case of crushing, when collecting boulders as in this embodiment, there is no need to sandwich and hold boulders, so that the partition rod member 24 is not necessary.

  The illustrated embodiments are merely examples of the present invention, and the present invention is not limited to those directly described by the described embodiments, and various improvements and modifications made by those skilled in the art within the scope of the claims. Needless to say, it encompasses changes.

DESCRIPTION OF SYMBOLS 1 Shield machine 2 Engraver body 2a Front trunk 2b Rear trunk 3 Cutter head 3a Rotation center shaft 3b Outer ring 3c Cutspoke 3d Cutter bit 3e Opening 4 Bulkhead 5 Chamber 6 Turning ring 7 Support arm 8 Ring gear 9 Motor 10 Pinion gear 11 Rotary joint 12 Discharge port 13 Earth removal device (screw conveyor)
14 Lap portion 15 Linking jack 16 Elector 16a Grasping portion 17 Propulsion jack 18 Tail seal 21 Processing port 21a Tubular portion 22 Valve 23 Cutter head side rod member 24 Bulkhead side rod member 25 Rock drill 25a Rock drill rod 30 Rock drill set Equipment 31 Main body 32 Pipe-like member 32a Spherical surface 32b Rod through hole 33 Ball valve 34 Opening / closing lever 35 Packer 38 Gate valve 40 Recovery equipment 41 Main piston 42 Piston rod 43 Sub piston 44 Hydraulic chamber 45 Opening 46 Lid member

Claims (10)

A cylindrical engraver main body, a rotatable cutter head disposed at the front end of the main body, a partition wall disposed in the body behind the cutter head, and between the cutter head and the partition wall A chamber for storing earth and sand formed and excavated by the cutter head, and a soil discharging device for discharging the earth and sand stored in the chamber from a discharge port opened in the partition wall toward the outside of the machine. Machine,
A processing port opened in the partition wall in the circumferential direction above the discharge port; and
A valve for opening and closing the processing port;
A cutter head-side rod member capable of moving in and out of the chamber from the cutter head and capable of moving boulders in the chamber to the front of the processing port by rotation of the cutter head,
The shield port machine is characterized in that the processing port is used for crushing or collecting boulders moved forward. A partition-side rod member that can be projected and retracted from the partition into the chamber above the processing port in the circumferential direction,
When the cutter head side rod member moves the boulders in the chamber to the front of the processing port by the rotation of the cutter head, the boulders are sandwiched between the partition wall side rod members. The shield machine according to claim 1.   The shield machine according to claim 1 or 2, further comprising a rock drill for crushing boulders set in the processing port.   4. The shield machine according to claim 3, wherein the processing port includes a rock drill set facility that allows the rock drill to be inserted in a watertight state and swingable.   The rock drill set equipment includes a main body that closes the processing port, a pipe-shaped member that penetrates the main body and is tiltably supported by the main body, and is capable of inserting a rock drill rod of the rock drill, The shield machine according to claim 4, further comprising: a seal member provided on an inner peripheral portion of the pipe-shaped member and allowing the rock drilling rod to be inserted in a watertight state.   6. The shield machine according to claim 5, wherein the valve is provided inside the pipe-shaped member to open and close an insertion path for the rock drilling rod.   2. The shield machine according to claim 1, further comprising: a cylindrical portion that is connected to the processing port and extends rearward of the partition wall; and a recovery facility that draws and collects boulders into the cylindrical portion. A cylindrical engraver main body, a rotatable cutter head disposed at the front end of the main body, a partition wall disposed in the body behind the cutter head, and between the cutter head and the partition wall A chamber for storing earth and sand formed and excavated by the cutter head, and a soil discharging device for discharging the earth and sand stored in the chamber from a discharge port opened in the partition wall toward the outside of the machine. In the machine
When boulders are taken into the chamber,
(1) A cutter head side rod member protrudes from the cutter head into the chamber,
(2) By rotating the cutter head, the boulder in the chamber is opened from the front of the discharge port to the partition wall in the circumferential direction above the discharge port by the cutter head side rod member. Move it to the front of the treatment port,
(3) A method for processing boulders in a shield machine, wherein a rock drill is inserted into the chamber from the processing port to crush boulders. Before rotating the cutter head, the partition wall side rod member protrudes from the partition wall into the chamber above the processing port in the circumferential direction,
When the boulder in the chamber is moved forward of the processing port by the cutter head side rod member, the boulder is sandwiched and held between the cutter head side rod member and the partition wall side rod member. A method for treating boulders in a shield machine according to claim 8.   9. The method for treating boulders in a shield machine according to claim 8, comprising a step of collecting boulders from the treatment port instead of the step of crushing boulders of (3).