JP4732950B2 - Crusher for shield machine - Google Patents

Description

  The present invention relates to an apparatus capable of forming an intake space between a chamber of a shield machine and a discharge port on the front end side of a discharge pipe and crushing a massive excavated material in the intake space.

  Conventionally, a shield machine has a fuselage, a plurality of shield jacks for propelling the fuselage, a cutter head provided on the front end side of the fuselage, a chamber for accommodating excavated soil excavated by the cutter head, and a rear end of the chamber And a soil removal device having a soil discharge pipe for discharging the excavated soil in the chamber, the front end portion of the soil discharge pipe is connected to the partition wall, and the soil discharge port on the front end side of the soil discharge pipe faces the chamber .

  Here, in a mud pressure (earth pressure) type shield machine (for example, refer to Patent Document 1), a screw conveyor having a screw auger that is rotatably disposed inside a soil discharging pipe is employed as a soil discharging device. In addition, a muddy water type shield excavator (see, for example, Patent Document 2) employs a muddy water pumping type earth removing device.

  By the way, in the shield machine, when excavating natural ground including huge gravel, cobblestone, rocks, wooden piles, etc., these gravels, cobblestones, rocks, wooden piles, etc. are not sufficiently cut and crushed, In some cases, the massive excavated material is taken into the chamber as a massive excavated material that cannot be discharged, and the massive excavated material clogs the drainage pipe. In this case, since the soil removal capability of the soil removal device is reduced or soiling becomes impossible, the excavation work is interrupted, and the very complicated work including the work of dismantling the soil removal device and the work for removing the excavated material is performed. Must be done and inefficient. In view of this, devices for crushing massive excavated materials that may block the soil discharge pipe have been put to practical use.

  In the shield machine of Patent Document 1, the soil discharge port on the front end side of the soil discharge pipe is located behind the partition wall, the housing is disposed on the front side of the soil discharge port, and the front end portion of the housing is connected to the partition wall, The interior of the housing faces the chamber, the front end portion of the soil discharge pipe is connected to the rear wall portion of the housing, and the soil discharge port faces the interior of the housing. A pair of rolls are juxtaposed in the housing with a gap left and right, and a hydraulic motor and a gear for rotating these rolls are provided. The gap between the pair of rolls is located on the front side of the earth discharge port, and the pair of rolls is rotated by the hydraulic motor and the gear so that the massive excavated material passing between the rolls can be discharged by the earth removal device. Crush.

  In the shield machine of Patent Document 2, the front end portion of the soil discharge pipe is directly connected to the partition wall, and the sludge discharge pipe impact device is erected at the front end portion of the soil discharge pipe. This sludge pipe impact device includes a rod with a bit exchangeably attached to its lower end, an inner cylinder that guides the rod to move up and down, an outer cylinder that guides the inner cylinder to move up and down, and an inner cylinder In contrast, a hydraulic motor and a cam that move the rod up and down, a hydraulic jack that moves the rod, the inner cylinder, the hydraulic motor, the cam, and the like up and down integrally with the outer cylinder are provided.

  This sludge drainage impact device is moved up and down together with the inner cylinder, the hydraulic motor, the cam and the like by the hydraulic jack over the position where the rod protrudes inside and out of the soil discharge pipe. The rod is reciprocated up and down at a rate of about 100 times per minute by a hydraulic motor and a cam in a state of projecting into the clay pipe, hitting and crushing the massive excavated material. In addition, it is described that the rod can be reciprocated up and down at about 60 times per minute together with the inner cylinder, the hydraulic motor, the cam, and the like by the hydraulic jack to hit and crush a lump of excavated material.

  In the main embodiment of Patent Document 2 (FIG. 2), the sludge draining device is arranged in a vertical posture, the rod extends toward the inner wall of the drain pipe, and the massive excavated material that has entered the drain pipe can be crushed. In the modified example (FIG. 6), the sludge pipe impact device is arranged in an inclined posture, and the rod extends toward the soil discharge port so that the massive excavated material clogged in the soil discharge port can be crushed. ing.

JP 59-206598 A JP 2002-168091 A

  In the shield machine of Patent Document 1, the pair of rolls are large, and the entire rolls are disposed inside the casing, which is a discharge passage for excavated soil, and there is also a gap between the pair of rolls. Since these rolls are in a state where these rolls largely block the front side of the discharge port of the discharge pipe, and even if it is not necessary to crush the excavated material, the same state is maintained. May decrease.

  In addition, since a large pair of rolls and a large casing that accommodates these rolls are required, a large structure is required, a large installation space is required, and a hydraulic motor and gear that rotates the pair of rolls. However, there is a problem that it becomes a complicated structure and is difficult to apply to an existing earth removing device.

  In the sludge drainage hitting device of Patent Document 2, the rod is reciprocated up and down by a hydraulic motor or a hydraulic jack to hit a massive excavated material, but there is a possibility that the excavated material cannot be reliably crushed by itself. In the apparatus of the main embodiment (FIG. 2), there is a possibility that the rod sandwiches the massive excavated material between the earth discharging pipes and crushes them. There is a risk of damage due to damage, and it is not possible to deal with massive excavated items that are clogged in the soil discharge port. In the apparatus of the modified example (FIG. 6), the massive excavated material clogged in the discharge port is hit, but it is still difficult to reliably crush the excavated material by itself.

  Moreover, although this sludge drainage hammering device is easy to apply to existing soil discharging devices, it has an extremely complicated structure because it includes an inner cylinder, outer cylinder, hydraulic motor, cam, hydraulic jack, etc. Problems such as a large structure that is long in the vertical direction, that it cannot be installed compactly, and that the rod must be reciprocated up and down at a relatively high speed, making it difficult to apply to a mud pressure shield machine. There is.

  An object of the present invention is to secure a desired earth discharging capacity for discharging excavated soil from an earth discharging pipe in a crushing device of a shield machine, and to perform a massive excavated object in an intake space in front of the earth discharging port. , The excavated material is removed by crushing or moving, and the clogging of the drainage pipe is released without performing very complicated work including the dismantling work of the excavated pipe and the removal work of the excavated material. Or prevent it, make it possible to construct a tunnel efficiently, make the structure simple and small and reduce the installation space, make it easy to apply to existing drainage pipes, mud pressure shield machine And applicable to both muddy-water shield machines.

A crushing device for a shield machine according to claim 1, a fuselage, a cutter head provided on a front end side of the fuselage, a chamber for storing excavated soil excavated by the cutter head, a partition wall for partitioning the rear end of the chamber, In a shield machine having a front end connected to the partition wall and a discharge pipe for discharging the excavated soil in the chamber, a discharge port on the front end side of the discharge pipe is positioned behind the partition wall, A cylindrical member that forms an intake space recessed backward from the partition so as to communicate with the chamber is provided, and the cylindrical member has a pair of left and right side walls and a bottom wall that extend forward, and the cylindrical member or At least one pair of hydraulic jacks attached to a partition wall in the vicinity thereof, and at least one pair of oils disposed opposite to each other so as to be able to crush the massive excavated material in the intake space by the rods of these hydraulic jacks It is provided with a jack.

  In this crushing device, normally, at least one pair of hydraulic jack rods is held in a contracted state so as not to hinder the inflow of excavated soil into the soil discharge port, and the front side of the soil discharge port is greatly opened. In addition, the expected soil removal capacity for discharging excavated soil from the soil discharge pipe is ensured. When a block of excavated material is taken into the intake space, at least one pair of hydraulic jack rods is extended, and the block of excavated material in the input space is strongly sandwiched and crushed by these rods. The excavated material is discharged by the earth removal pipe, or the rod-shaped excavated material is pushed out by these rods and moved out of the intake space, and the mass excavated material is removed from the front side of the earth excavation port, and the earth excavation pipe is blocked. Is lifted or prevented. Thereafter, the rods of at least one pair of hydraulic jacks are contracted, and again, the front side of the soil discharge port is largely opened to ensure the desired soil removal capability.

Here, the following configuration can be adopted in the invention of claim 1.
When the rods of the pair of hydraulic jacks are extended, the tips of the rods approach each other on the front side of the discharge port, and when the rods of the pair of hydraulic jacks are contracted, the rods are connected to the discharge port. It is comprised so that it may recede to the side which does not become the hindrance of the inflow of the excavated soil to (claim 2).

The cylinder body of the pair of hydraulic jacks is disposed outside the taking-in space, and the rod is made to penetrate the tubular member and face the taking-in space. As the at least one pair of hydraulic jacks, two pairs of left and right hydraulic jacks are provided up and down (Claim 4) .

A crushing member, which is replaceably attached, is provided at the tip of the rod of the pair of hydraulic jacks (Claim 5 ). It said shield machine is provided with a screw conveyor having a screw auger rotatably disposed waste drainpipe and into the interior of the discharge drainpipe is provided with a cutter member mounted on the front end of the screw auger (claim 6 ).

  According to the crushing device of the shield machine of claim 1, the earth discharge port on the front end side of the earth removal pipe is located behind the partition wall, and the recess recessed backward from the partition wall so that the earth discharge port communicates with the chamber. A cylindrical member is formed to form an intake space, and at least one pair of hydraulic jacks is attached to the cylindrical member or a partition wall in the vicinity of the cylindrical member, and the rods of these hydraulic jacks are capable of crushing massive excavated material in the intake space. Since it is arranged in the direction, normally, the rods of at least one pair of hydraulic jacks are held in a contracted state so that the flow of excavated soil into the soil discharge port is not hindered. The front side of the door can be opened widely to ensure the desired soil removal capacity to discharge the excavated soil from the soil discharge pipe, and when a large amount of excavated material is taken into the intake space, at least one pair of hydraulic jack rods is extended. Let this From the rod, the massive excavated material in the intake space is strongly sandwiched and crushed and discharged by the drainage pipe, or the massive excavated material is pushed out by the rod and moved out of the intake space, thus Remove the massive excavated material from the front side of the discharge port, and remove or prevent the clogging of the discharge tube without performing very complicated work including dismantling work due to clogging of the discharge tube and removal work of excavated material. Can be constructed efficiently.

Here, the earth discharge port is located behind the partition wall, and a tubular member is used to form an intake space that is recessed backward from the partition wall so that the earth discharge port and the chamber communicate with each other. A large lump of excavated material stays in the take-in space (held by a cylindrical member) to facilitate crushing, and a hydraulic jack is attached to the inside of the machine. The hydraulic jack is exposed to the chamber and interferes with the drilling rig or is damaged. In this way, the above function of the hydraulic jack can be exhibited. In addition, this crushing device, which can be configured by providing a cylindrical member and at least one pair of hydraulic jacks, has a simple and compact structure, is compactly arranged, reduces installation space, and can be applied to existing soil pipes. Since the massive excavated material is sandwiched and crushed by at least one pair of hydraulic jacks, it can be applied to either a mud pressure shield machine or a muddy water shield machine. Since the cylindrical member has a pair of left and right side walls and a bottom wall spreading forward, the opening on the chamber side of the cylindrical member is enlarged to facilitate the inflow of excavated soil from the chamber to the intake space. The excavated soil can be reliably guided to the discharge port.

  According to the crushing device of the shield machine of claim 2, when the rods of the pair of hydraulic jacks are extended, the tip portions of these rods are close to each other on the front side of the soil discharge port, so that the lump in the intake space When the rods of a pair of hydraulic jacks are shrunken, the rods retract to the side that does not interfere with the flow of excavated soil into the drainage port. The front side can be opened widely to ensure the desired soil removal capacity for discharging the excavated soil from the soil discharge pipe.

  According to the crushing device for the shield machine of claim 3, the cylinder body of the pair of hydraulic jacks is arranged outside the taking-in space, and the rod is made to penetrate the tubular member and face the taking-in space. The cylinder body is attached to a cylindrical member or a partition wall in the vicinity of it, and the rod-shaped drilling object in the take-up space can be crushed by the rod. A hydraulic jack can be placed to prevent this.

  According to the crushing device for a shield machine of claim 4, since two sets of left and right hydraulic jacks are provided as upper and lower pairs as at least one pair of hydraulic jacks, the tip of the soil discharge pipe is usually at the lower end of the partition wall. It is connected, but the intake space (cylindrical member) is provided at the position corresponding to this, and a total of four hydraulic jacks in a pair of left and right upper and lower pairs are arranged appropriately on the cylindrical member or the partition wall in the vicinity. It is possible to enhance the function of attaching and crushing the massive excavated material in the intake space.

According to the crushing device of the shield machine of claim 5 , since the crushing member that is replaceably attached to the tip of the rod of the pair of hydraulic jacks is provided, the function of crushing the massive excavated material is enhanced, The worn crushing member can be replaced with a new crushing member, and the type of crushing member suitable for the type of massive excavated material (gravel, cobblestone, rock, wood pile) to be crushed can be provided. The crushing function can be maintained.

According to the crushing device for a shield machine according to claim 6, the shield machine comprises a screw conveyor having a discharge pipe and a screw auger rotatably disposed inside the discharge pipe, and a front end portion of the screw auger. Because the cutter member attached to is provided, the massive excavated material in the intake space that could not be crushed by the hydraulic jack is crushed by the cutter member at the front end of the screw auger, and the massive excavation that cannot be discharged by the soil discharge pipe It can prevent the intrusion of objects into the drainage pipe.

  The shield machine has a fuselage, a cutter head provided on the front end side of the fuselage, a chamber for storing excavated soil excavated by the cutter head, a partition wall for partitioning the rear end of the chamber, and a front end portion connected to the partition wall for excavation in the chamber. The crushing device of the shield machine according to the present invention is provided with a soil discharge pipe for discharging soil, and the soil discharge port on the front end side of the soil discharge pipe is positioned behind the partition wall so that the discharge port and the chamber communicate with each other. A cylindrical member for forming an intake space recessed backward from the partition wall is provided, and at least one pair of hydraulic jacks attached to the cylindrical member or a partition wall in the vicinity thereof, and the rods of these hydraulic jacks capture the inside of the intake space. At least one pair of hydraulic jacks are provided so as to be capable of crushing the massive excavated material.

  As shown in FIGS. 1 to 3, the shield machine 1 is provided on the front side of the body 2, a plurality of shield jacks 3 for propelling the body 2, a plurality of middle-folded jacks 4 for folding the body 2, and the body 2. Excavator 5, chamber 6 for accommodating excavated soil excavated by excavator 5, partition wall 7 that partitions the rear end of chamber 6, agitator 8 for agitating excavated soil in chamber 6, excavated soil in chamber 6 A segment S is formed on the inner surface of the tunnel T excavated and formed by the excavating device 5, the earth removing device 9 having a pair of right and left earth discharging pipes 80, a pair of left and right crushing devices 10 capable of crushing a massive excavated material. An erector device 11 to be attached, a back injection device 12 for injecting mortar between the segment assembled by the erector device 11 and the inner surface of the tunnel T, and the like are provided.

  The pair of right and left earth removal devices 9 have the same structure, and as shown in FIGS. 1 to 7, each earth removal device 9 is disposed in the earth discharge pipe 80 and the screw auger rotatably disposed inside the earth discharge pipe 80. 81, and a screw conveyor 9A is configured by the soil discharge pipe 80, the screw auger 81, and the like. A soil discharge port 80 a on the front end side of the soil discharge pipe 80 is located behind the lower portion of the partition wall 7 and communicates with the chamber 6 through the intake space 90 formed by the corresponding cylindrical member 91 of the crushing device 10. The cutter auger 81 of the crushing device 10 is attached to the distal end portion of the screw auger 81, and the distal end portion of the screw auger 81 projects slightly forward from the soil discharge port 80 a of the soil discharge pipe 80.

Next, the crushing apparatus 10 will be described in detail.
The pair of left and right crushing apparatuses 10 have the same structure, and as shown in FIGS. 1 to 7, each crushing apparatus 10 positions the discharge port 80 a on the front end side of the discharge pipe 80 behind the partition wall 7, A cylindrical member 91 that forms an intake space 90 that is recessed backward from the partition wall 7 is provided so as to allow the earth discharge port 80a and the chamber 6 to communicate with each other, and two left and right hydraulic jacks 95 attached to the cylindrical member 91 are provided. The rods 95b of these hydraulic jacks 95 are provided with two pairs of left and right hydraulic jacks 95 arranged opposite to each other so that the massive excavated material in the intake space 90 can be crushed.

The tubular member 91 is formed in a rectangular tube shape having an upper wall 91a that spreads forward, a pair of left and right side walls 91b and a bottom wall 91c, and a rear wall 91d that is inclined downwardly and is reinforced with a pair of reinforcing side plates 91e and a reinforcing member. The front end of the upper wall 91a, the side wall 91b, and the bottom wall 91c is coupled to the peripheral portion of the rectangular opening 45 of the partition wall 7 and the body 2 through the rear plate 91f. Faces the chamber 6, the front end of the soil discharge pipe 80 is coupled to the rear wall 91 d in an internally fitted manner, and the soil discharge port 80 a faces the intake space 90.

  As a pair of left and right hydraulic jacks 95, two pairs of left and right hydraulic jacks 95 are provided up and down, and the upper pair of left and right hydraulic jacks 95 are disposed at a height position corresponding to the upper half of the soil discharge port 80a. The pair of left and right hydraulic jacks 95 on the lower side is disposed at a height position corresponding to the lower half of the soil discharge port 80a.

Each hydraulic jack 95 includes a cylinder body 95a, a rod 95b, and a guide member 95c. The guide member 95c is fixed to a rod side end of the cylinder body 95a, and the rod 95b is connected to the guide member 95c with a seal member 95d. It is guided to extend and contract through The cylinder body 95a is disposed on the lateral side outside the front portion of the intake space 90, the guide member 95c is coupled to the side wall 91b of the cylindrical member 91 and the reinforcing side plate 91e in an internally fitted manner, and the rod 95b connects the guide member 95c. Through the cylindrical member 91 ( side wall 91b) and faces the intake space 90 in a protruding manner.

  Each hydraulic jack 95 is constituted by a backward-acting hydraulic cylinder, and is expanded and contracted by a hydraulic pressure supply unit (not shown). As shown by chain lines in FIGS. In the extended state, the tip portions of the rods 95b approach and face each other on the front side of the soil discharge port 80a, and the rods 95b of the two pairs of left and right hydraulic jacks 95 are contracted as shown by solid lines in FIGS. Then, these rods 95b are configured to recede to the side that does not hinder the inflow of excavated soil into the soil discharge port 80a.

  Each crushing device 10 is provided with a crushing member 96 that is replaceably attached to the tip of the rod 95b of two pairs of hydraulic jacks 95, and the type of massive excavated material to be crushed (gravel, cobblestone, rock, A plurality of types of crushing members 96 suitable for wood piles are prepared. Further, a cutter member 97 that is replaceably attached to the front end portion of the screw auger 81 is provided.

Here, a plurality of inlets 92 are formed in the side wall 91 b and the bottom wall 91 c of the cylindrical member 91 , and injection pipes 93 are connected to these inlets 92, and washing water is taken in from these inlets 92. The leading end portion of the intake space 90 and the screw auger 81 can be cleaned.

Next, the operation of the shield machine 1 will be described.
In this shield machine 1, the body 2 is propelled by a plurality of shield jacks 3, the ground in front of the body 2 is excavated by the excavator 5, and the excavated soil is collected in the chamber 6, and a pair of soil removal devices. 9 is discharged. Thus, the tunnel T is excavated and formed, and the plurality of segments S are sequentially assembled in a ring shape by the erector apparatus 11.

  In the normal time when the tunnel T is constructed as described above, in the pair of crushing devices 10, the rods 95b of the two left and right hydraulic jacks 95 prevent the inflow of excavated soil into the soil discharge port 80a. In a pair of soil removal devices 9, the front side of the soil discharge port 80 a is largely opened and excavated from the soil drainage pipe 80, while being held in a contracted state (a state indicated by a chain line in FIGS. 6 and 7). The expected soil removal capacity to discharge the soil is secured.

  Here, when excavating natural ground including huge gravel, cobblestones, rocks, wooden piles, etc., these gravels, cobblestones, rocks, wooden piles, etc. are not sufficiently cut and crushed, and are not discharged by the earth removal device 9. There is a case where the massive excavated material is taken into the chamber 6 and the massive excavated material is taken into the intake space 90 or is blocked. This state can be detected by a decrease in the amount of excavated soil discharged from the soil discharge pipe 80 or an increase in the pressure detected by the earth pressure gauge 43.

  Therefore, in the crushing device 10, the rods 95b of the two pairs of right and left hydraulic jacks 95 are extended, and the massive drilled material in the intake space 90 is strongly sandwiched and crushed by these rods 95b, and the crushed excavated material. Is discharged by the earth discharge pipe 80, or the massive excavated material is pushed by these rods 95b to move out of the intake space 90, and the massive excavated material is removed from the front side of the earth discharging port 80a. The rod 95b of the pair of hydraulic jacks 95 is contracted, and the front side of the soil discharge port 80a is greatly opened to ensure the desired soil removal capability.

  According to the crushing device 10 of the shield machine 1 described above, the soil discharge port 80a on the front end side of the soil discharge pipe 80 is positioned behind the partition wall 7, and the soil discharge port 80a and the chamber 6 are communicated with each other. A cylindrical member 91 that forms an intake space 90 that is recessed rearward from the partition wall 7 is provided, and a pair of left and right hydraulic jacks 95 are attached to the cylindrical member 91, and a lump in the intake space 90 is provided by the rod 95 b of these hydraulic jacks 95. The excavations were arranged in a mutually opposing manner so that they could be crushed.

  Accordingly, during normal times, the rods 95b of the pair of left and right hydraulic jacks 95 are held in a contracted state so that the rod 95b does not hinder the inflow of excavated soil into the soil discharge port 80a. Can open the front side of the pipe and secure the desired earth discharging ability to discharge the excavated soil from the earth discharging pipe 80. When a massive excavated material is taken into the intake space 90, a pair of left and right hydraulic jacks 95 95b is extended, and the massive excavated material in the take-in space 70 is strongly sandwiched by these rods 95b and crushed and discharged by the earth discharging pipe 80, or the massive excavated material is pushed by these rods 95b. Thus, the mass excavated material is removed from the front side of the soil discharge port 80a, and very complicated work including dismantling work and excavated material removal work by closing the soil discharge pipe 80 is performed. Ukoto without be released or preventing clogging of the exhaust drainpipe 80 can be efficiently performed to construct a tunnel T.

  Here, the discharge port 80 a is positioned behind the partition wall 7, and the intake space 90 that is recessed backward from the partition wall 7 is formed by the tubular member 91 so that the discharge port 80 a and the chamber 6 communicate with each other. The massive excavated material that cannot be discharged by the soil discharge pipe 80 stays in the take-in space 90 (held by the cylindrical member 91) to be easily crushed, and the hydraulic jack 95 is attached to the inside of the machine. The above-described function of the hydraulic jack 95 can be exerted so as not to be exposed to the 6 side and interfere with or damage the excavator 5. Moreover, the crushing apparatus 10 can be configured by providing a cylindrical member 91 and a pair of left and right hydraulic jacks 95. The crushing apparatus 10 can be simply and compactly arranged, compactly arranged, and can be installed in a small space. Since the massive excavated material is sandwiched and crushed by the pair of right and left hydraulic jacks 95, it can be applied to either a mud pressure shield machine or a muddy water shield machine.

  In the state in which the rods 95b of the two pairs of hydraulic jacks 95 are extended, the tip portions of these rods 95b approach and face each other on the front side of the soil discharge port 80a, so that the massive excavated material in the intake space 90 is reliably crushed, Further, when the rods 95b of the pair of hydraulic jacks 95 are contracted, the rods 95b retreat to the side that does not interfere with the inflow of the excavated soil into the soil discharge port 80a, so that the front side of the soil discharge port 80a is opened widely. As a result, it is possible to reliably ensure the desired soil removal capacity for discharging the excavated soil from the soil discharge pipe 80.

  Since the cylinder body 95a of the two pairs of hydraulic jacks 95 is disposed outside the taking-in space 90, and the rod 95b is passed through the tubular member 91 so as to face the taking-in space 90, the cylinder body 95a is moved to the tubular member. The hydraulic jack 95 can be disposed so as to be attached to 91 and capable of crushing the massive excavated material in the intake space 90 by the rod 95b.

  Since two pairs of left and right hydraulic jacks 95 are provided as two pairs of hydraulic jacks 95, the distal end portion of the soil discharge pipe 80 is connected to the lower end portion of the partition wall 7, but is taken into the corresponding position. Space 90 (cylindrical member 91) is provided, and a total of four hydraulic jacks 95 in two pairs of left and right pairs are attached to the cylindrical member 91 in an appropriate arrangement, and the massive excavated material in the intake space 90 is crushed. Can enhance the function.

Since the cylindrical member 91 has a pair of left and right side walls 91b and a bottom wall 91c that are widened forward, the rectangular opening 45 on the chamber 6 side (front side) of the cylindrical member 91 is enlarged, and the intake space 90 from the chamber 6 is increased. It is possible to promote the inflow of excavated soil into the soil and reliably guide the excavated soil to the soil discharge port 80a.

  Since the crushing member 96 that is replaceably attached to the tip of the rod 95b of the two pairs of hydraulic jacks 95 is provided, the function of crushing the massive excavated material is enhanced, and the worn crushing member 96 is replaced with a new crushing member 96. Moreover, since the kind of crushing member 96 suitable for the kind of massive excavation object (cobble, cobblestone, rock, wooden pile) used as crushing object can be provided, a high crushing function can be maintained.

  The shield machine 1 includes a screw conveyor 9A having a discharge pipe 80 and a screw auger 81 rotatably disposed inside the discharge pipe 80, and a cutter mounted on the front end of the screw auger 81 in a replaceable manner. Since the member 97 is provided, the massive excavated material in the intake space 90 that could not be crushed by the hydraulic jack 95 is crushed by the cutter member 97 at the front end of the screw auger 81 and cannot be discharged by the soil discharge pipe 80. The excavated material can be prevented from entering the drainage pipe 80, the worn cutter member 97 can be replaced with a new cutter member 97, and the type of massive excavated material to be crushed (gravel, cobblestone, rock, wood Since the kind of cutter member 97 suitable for the pile can be provided, a high crushing function can be maintained.

In addition, you may change the said crushing apparatus 10 as follows.
1] Instead of the two pairs of left and right hydraulic jacks 95, one pair of left and right hydraulic jacks 95, or three or more pairs of left and right hydraulic jacks 95 may be provided. In the latter case, a plurality of pairs of left and right hydraulic jacks 95 may be provided vertically and a plurality of pairs may be provided on the front and back.
2] The cutter member 87 may be omitted.

3] As shown in FIG. 8, the crushing member 96 provided at the tip of the rod 95b of each hydraulic jack 95 is omitted, and a pair of large left and right crushing members 98 are provided for the two pairs of hydraulic jacks 95. May be. In this case, each crushing member 98 is connected to the rods 95b of the two upper and lower hydraulic jacks 95 on each of the left and right sides, so that the massive excavated material in the intake space 90 can be more securely sandwiched and crushed. become.

4] As shown in FIG. 9, a hydraulic jack 95 may be attached to the partition wall 7 in the vicinity of the cylindrical member 91. In this case, the cylinder body 95 a of the hydraulic jack 95 is fixed to the partition wall 7 by the bracket 99 .

5 ] You may provide the excavation thing detection means which detects that the massive excavation thing was taken in into the taking-in space 90. As this excavated matter detection means, a sensor that directly detects a massive excavated matter by a radar or the like may be adopted.
6 ] Other than that, the present invention can be implemented with various modifications other than the above-mentioned disclosure within the scope of the present invention, and in addition to the mud pressure shield machine of this embodiment, the muddy water type shield machine The present invention can be applied to various shield machines.

It is a longitudinal section of a shield machine according to an embodiment of the present invention. It is a front view of a shield machine. The left half is a cross-sectional view taken along line AA in FIG. 1, and the right half is a cross-sectional view taken along line BB in FIG. It is a longitudinal cross-sectional view of the principal part of a soil removal apparatus (use condition) and a crushing apparatus. It is a longitudinal cross-sectional view of the principal part of a soil removal apparatus (slide state) and a crushing apparatus. It is a front view of a crushing apparatus. It is CC sectional view taken on the line of FIG. It is a front view of the crushing apparatus which concerns on the example of a change. It is sectional drawing of the crushing apparatus which concerns on another example of a change.

DESCRIPTION OF SYMBOLS 1 Shield machine 2 Body 6 Chamber 7 Bulkhead 9A Screw conveyor 10 Crushing device 62 Cutter head 80 Drain pipe 81 Screw auger 90 Taking-in space 91 Cylindrical member 91b Side wall 91c Bottom wall 95 Hydraulic jack 95a Cylinder body 95b Rod 96, 98 Crush Member 97 Cutter member

Claims (6)

A fuselage, a cutter head provided on the front end side of the fuselage, a chamber for storing excavated soil excavated by the cutter head, a partition wall for partitioning the rear end of the chamber, and a front end portion connected to the partition wall, the excavated soil in the chamber In a shield machine with a drain pipe that discharges
A discharge port on the front end side of the soil discharge pipe is positioned behind the partition wall, and a cylindrical member is provided that forms an intake space that is recessed rearward from the partition wall so that the discharge port and the chamber communicate with each other.
The cylindrical member has a pair of left and right side walls and a bottom wall spreading forward,
At least one pair of hydraulic jacks attached to the cylindrical member or a partition wall in the vicinity of the cylindrical member, and the rods of the hydraulic jacks are arranged in opposition to each other so that the massive excavated material in the intake space can be crushed. A crusher for a shield machine, comprising at least one pair of hydraulic jacks.   When the rods of the pair of hydraulic jacks are extended, the tips of the rods approach each other on the front side of the discharge port, and when the rods of the pair of hydraulic jacks are contracted, the rods are connected to the discharge port. The crushing device for a shield machine according to claim 1, wherein the crushing device is configured to retreat to the side that does not hinder the inflow of excavated soil into the shield.   3. The shield according to claim 1, wherein a cylinder main body of the pair of hydraulic jacks is arranged outside the taking-in space, and the rod is made to penetrate the tubular member and face the taking-in space. Crusher for excavator. Wherein as at least one pair of hydraulic jacks, crushing device of the shield machine according to any one of claims 1 to 3, characterized in that the pair of left and right hydraulic jacks provided two pairs vertically. The crushing device for a shield machine according to any one of claims 1 to 4, wherein a crushing member that is replaceably mounted is provided at a tip portion of the rod of the pair of hydraulic jacks. The shield machine includes a screw conveyor having a soil discharge pipe and a screw auger rotatably disposed inside the soil discharge pipe,
The crushing device for a shield machine according to any one of claims 1 to 5, wherein a cutter member attached to a front end portion of the screw auger is provided.