JP4931635B2 - How to reassemble the excavator - Google Patents

Description

The present invention relates to a method for reassembling an inner cylinder portion-recoverable excavator .

  In recent years, in the construction of pipelines such as sewers, when it is not possible to secure sufficient land for connecting existing pipes and manholes or for reaching shafts, the excavator cannot be recovered and lifted after excavation is completed. There are many.

  Also, if there are obstacles such as sheet piles or piles on the face during excavation, it may not be possible to proceed further.

If the excavator cannot be recovered, it must be dismantled. However, in dismantling, inferior work for workers such as cutting with a firearm in a narrow space is accompanied, and the excavator cannot be reused, which is economically loss in terms of effective use of resources.

  Also, if there are obstacles along the way, it is necessary to remove them, but if the ground is a residential area where private houses are densely packed, for example, a shaft will be dug from the ground side, and an operator will enter the front of the face. There is a problem that the work cannot be performed.

The present invention has been proposed in view of the above, and the object of the present invention is that the main part of the excavator can be easily recovered and pulled back into the pipeline again to assemble the excavator and restart it. It is to provide a re-assembling method of economical recovered excavator.
The present invention, which is the main part of the excavator, as a condition for recovering and re-assemble and re-start the cutter drive body the inner cylinder formed by inclusions, in the middle of excavation unable removal in previous work It is suitable to be applied when there are obstacles such as left piles and piles that cannot be removed from the ground.

According to the first aspect of the present invention, in the reassembling method of the excavator , the excavator in which the inner cylinder part constituting the cutter driving body is detachable is digged inside the outer cylinder part of the excavator, At the excavation position, the inner cylinder portion of the cutter driving body is separated from the outer cylinder portion of the excavator, the outer cylinder portion of the excavator is left, and the carriage is carried into the propelling pipe from the start shaft, and the inner cylinder portion After the excavation equipment in the propulsion pipe is removed so that it can be connected and pulled out, the transport carriage is connected to the rear part of the inner cylinder part, and the transport carriage is pulled out to the start shaft by traction means. In the excavator recovery method, the cutter driving body and a transport carriage connected thereto are drawn into the propulsion pipe, a winch is mounted on the transport carriage, and a second wire is mounted on the outer cylinder of the excavator. Secure one end of the rope and The other end of the wire rope is connected to the winch, the second wire rope is wound up by the winch, the cutter driving body and the transport carriage are brought close to the engraving machine outer cylinder part, and the cutter is placed in the engraver outer cylinder part The inner cylinder part of the driving body is fitted and integrated, the one end part of the second wire rope is removed, the winch is wound up and collected, the transport carriage is separated from the inner cylinder part, and the excavator is restarted. It can be assembled and re-started .
The present invention is claimed in claim 2, wherein, in the re-assembling method of excavator according to claim 1, wherein the excavation outside cylindrical portion wire rope through tube is provided along its length, the second wire One end of the rope is fixed to the wire rope fixing portion of the outer cylinder portion of the excavator, and the other end is pulled out from the front portion of the wire rope penetrating pipe, and the wire rope through hole provided in the partition wall of the inner cylinder portion is provided. After that, it is connected to the winch.
According to a third aspect of the invention, the reassembly process of excavator according to claim 1, when for fitting the inner cylindrical portion in the excavation outside cylindrical portion provided with a reaction force frame to the rear of the transport carriage, The transport carriage is pushed in by a push-in jack provided on the reaction force stand, and the inner cylinder portion is fitted into the outer cylinder portion of the excavator.

According to the present invention, when there is an obstacle in the course of excavation, the main part of the excavator can be easily excavated without an operator entering the face and without dismantling the excavator using a firearm or the like. After separating from the outer cylinder part and collecting it in the starting shaft, removing the obstacles, the main part of the excavator is reintroduced into the pit and easily integrated with the remaining excavator outer cylinder part to reassemble the excavator Then you can resume digging .

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment, a case where the present invention is applied to an excavator (generally also referred to as a propulsion device) in the propulsion method will be described.

  FIG. 1A shows a case where the excavator encounters an obstacle during excavation. FIG. 1B is a front view of the excavator, and FIG. 1C is an explanatory view showing the configuration of the outer cylinder portion of the excavator in FIG.

  In FIG. 1A, reference numeral 1 denotes an excavator used in the present invention. This excavator 1 has a substantially cylindrical shape, and is installed in an outer cylinder portion 2 of the excavator that can be left in the constructed horizontal shaft, and is provided at an inner position of the outer cylinder portion 2 of the excavator, and includes the inner cylinder portion 4. The cutter drive body 3 is roughly classified into the recoverable cutter drive body 3, and the cutter drive body 3 forms a main part of the excavator.

  The cutter driver 3 has an inner cylinder part 4 that is smaller in diameter than the outer cylinder part 2 of the excavator and has a concentric shape, a partition wall 5 provided in front of the inner cylinder part 4, and a front part of the partition wall 5. And a cutter driving unit 7 provided at the rear end of the partition wall 5 and a soil removal device 15 for discharging excavated soil below the partition wall 5. is doing.

  The tip of the excavator outer cylinder 2 forms a cylindrical hood, and the rear part of the digging machine has a double-pipe structure inside. As shown in FIG. The wire rope penetrating pipe 8 is provided along the length direction of the excavator outer cylinder 2, and the front part of the wire rope penetrating pipe 8 is provided with a screw plug 8 a.

  The screw plug 8a is screwed when digging, the wire rope penetrating tube 8 is blocked, and the excavated earth and sand do not enter inside.

  As shown in FIG. 4C, the inner cylinder portion 4 is detachable from the inner cylinder mounting portion 2b provided inside the excavator outer cylinder portion 2 by a fixing device 2e and a bolt 2f.

  The partition wall 5 is also provided with a wire rope insertion hole 5a, and is closed by a similar configuration (screw plug structure) during digging. This will be described later with reference to FIG.

  The cutter head 6 is provided radially on the outer peripheral side of the boss 10 at the front end portion of the drive shaft 9 connected to the cutter drive portion 7, the bit 11 at the front portion, and the stirring blade at the rear portion. And a cutter spoke 13 having 12. A fishtail-shaped bit 11 a is provided at the tip of the boss 10. The cutter spoke 13 is smaller than the inner diameter of the propulsion pipe 2A and can be reduced to substantially the same diameter as the outer diameter of the inner cylinder part 4, or can be expanded to substantially the same diameter as the outer diameter of the outer cylinder part 2 of the excavator. Thus, the length in the radial direction can be expanded and contracted, and the diameter is expanded during excavation and is contracted during recovery. The cutter head 6 having the cutter spoke 13 that can be expanded and contracted and whose outer diameter is variable (expanded diameter / reduced diameter) can be realized by charging the cutter spoke 13 with, for example, a prior patent of the applicant of the present application. This is well known as shown in Japanese Patent No. 3361139.

  The cutter drive unit 7 has a drive motor and a gear mechanism (both not shown), and the driving force of the drive motor is transmitted to the drive shaft 9 via the gear mechanism and is fixed to the tip of the drive shaft 9. The head 6 is rotationally driven to excavate the face. The cutter driving unit 7 having such a configuration is also well known.

  The recoverable inner cylinder part 4 includes a cutter head 6 and a cutter driving part 7 integrated with the partition wall 5, and the cutter driving body 3 including the inner cylinder part 4 configured in this manner is left as it is. It is detachably mounted inside the possible engraver outer cylinder part 2.

  As described above, the cutter head 6 rotates through the cutter driving unit 7, and the face is excavated. The excavated soil is taken into the face chamber 14 in front of the partition wall. A mud material such as bentonite solution is injected into the excavated soil as necessary to impart viscosity. Such a mud material injection means is also well known.

  The excavated earth and sand in the face chamber 14 is discharged to the rear through the earth removing device 15 connected to the lower part of the partition wall 5 along with the excavation, and the excavated earth and sand from the discharging device 15 is discharged out of the mine via the earth and sand pumping pump 16. Is done. The earth removing device 15 connected to the partition wall 5 has a rear portion 15b that is detachable from the front portion 15a, and the rear portion 15b is separated when the inner cylinder portion 4 is recovered. Also, they are integrated during reassembly. Such a configuration is also well known.

  The rear cylinder 2c is connected to the rear part of the engraver outer cylinder part 2 via a gap, and the rear cylinder 2c and the engraver outer cylinder part 2 are connected via a direction correcting jack 17. This direction correcting jack 17 is also removed when the inner cylinder portion is recovered.

  In addition, in Fig.1 (a), 18 is obstacles, such as a sheet pile and a pile, 19 is a ground improvement area around an obstacle.

  FIG. 2A is a side view of the transport carriage used in the present invention connected to the cutter driver, and FIG. 2B is a plan view.

  The transport carriage 20 is used when the inner cylinder portion 4 is collected and reassembled. Reference numeral 20a denotes a front part of the carriage frame from which the inner cylinder part 4 can be freely attached and detached. The detachable means will be described later. A plurality of traveling wheels 21 are provided at appropriate positions on the bottom of the carriage frame 20b. In addition, at an appropriate position of the carriage frame upper portion 20c, at least one or more pressing wheels 22 are provided for preventing the lift of the transport carriage 20 so as to support the weight of the inner cylinder portion 4 and allowing the carriage to run stably. A winch mounting plate 20d is provided at the rear of the cart frame opposite to the cart frame front portion 20a.

  A winch 23 is provided on the rear surface of the winch mounting plate 20d. Reference numeral 23b denotes a drive winch motor, and 23a denotes drums provided on both sides thereof. The winch 23 is for self-propelled carriages. When a plurality of winches 23 are provided, the plurality of drums 23a are driven at the same speed by being driven by synchronous control or a common motor.

  The winch attachment plate 20d is provided with a wire rope attachment portion 24 for attaching one end portion of the first wire rope 25 when the transport carriage 20 is pulled toward the start shaft. 24a is the wire rope insertion hole. The other end of the first wire rope 25 is attached to a winch or the like (not shown) provided on the start shaft side.

Next, a description will be given recovered method when the middle of the path of the excavator there is an obstacle.

  First, as shown in FIG. 1 (a), the face is excavated by the cutter head 6 of the excavator 1, and the propulsion pipe 2A has a predetermined length while discharging excavated earth and sand, and has an outer diameter D and an inner diameter D1. Are connected and added on the start shaft side, and the excavator 1 is propelled by a main push jack provided in the start shaft.

  In this case, the cutter pork 13 is expanded and expanded in diameter, and its outer diameter is substantially equal to the outer diameter D of the propulsion pipe 2A.

  In the ground improvement section 19 where the obstacle 18 exists, the ground improvement is applied in advance before the excavation machine 1 arrives from the ground. In addition, ground improvement is performed by horizontal injection from within the excavator 1.

  FIG. 1A shows a state where the excavator 1 has dug up to the vicinity of the obstacle 18. When there is an obstacle 18, as shown in FIG. 2, the diameter of the cutter spoke 13 of the excavator 1 is reduced to a recoverable diameter D3. The diameter D3 is substantially the same as or smaller than the outer diameter D2 of the partition wall 5 (see FIG. 1B), and the propulsion tube outer diameter D> the propulsion tube inner diameter D1> the partition wall outer diameter D2 ≧ the cutter spoke reduced diameter D3. It has become.

  Prior to the recovery of the cutter driving body 3 including the inner cylinder portion 4, the rear portion 15 b of the earth removing device 15 whose front end is attached to the partition wall 5 of the excavator 1, a sediment pressure feeding pump 16, and a direction correcting jack 17. Remove and remove other excavation equipment from the mine.

  Next, as shown in FIG. 1 (c), the upper cross section in the figure provided from the inner cylinder mounting part of the engraver outer cylinder part 2 to the inner cylinder part 4 of the cutter driving body 3 inside the engraver outer cylinder part 2. The bolts 2f provided on the substantially L-shaped fixing device 2e are detached and separated.

  The carriage 20 on the start shaft side is carried into the pit, and as shown in FIG. 2, the carriage frame front plate 20a is brought into contact with the rear part of the inner cylinder part 4, and is provided on the outer periphery of the rear part of the inner cylinder part 4. The carriage frame front plate 20a is brought into contact with the flanged connecting portion to connect the two. 4 and 5, the illustration of the winch motor 23 shown in FIGS. 2A and 2B is omitted.

  The connection method may be fixed by a bolt or the like at the contact portion or supported and fixed by a support beam.

  Next, as shown in FIG. 5, one end of the first wire rope 25 is connected to the wire rope insertion hole 24 a of the transport carriage 20. The other end of the first wire rope 25 is connected to a winch (not shown) on the start shaft side.

  Then, the winch is rolled up and the inner cylinder part 4 constituting the cutter driving body is pulled out to the start shaft side through the transport carriage 20.

If it does in this way, the inner cylinder part 4 with which the cutter head 6, the cutter drive part 7, etc. were integrated can be collect | recovered from the inner side of a shaft to the start pit side, without a person entering a face.

  Next, a method for removing the obstacle 18 will be described.

  When the obstacle 18 is a sheet pile, an operator enters from the starting pit, clears excavated soil, cuts the obstacle 18 inside the mine, and removes it. FIG. 6 shows this state. Although the outer cylinder part 2 of the excavator is left behind, the inner cylinder part 4 is removed from the inner cylinder mounting part 2b, so that a working space can be secured and the work can be performed smoothly and safely.

  In this case, the ground improvement section 19 is stable so that the water stoppage of the surrounding ground is secured in advance by the ground improvement and does not collapse. Therefore, the worker can work safely. If necessary, a minimum mountain retaining work may be provided in the gap between the excavator 1 and the obstacle 18.

Next, a method for reassembling and restarting the excavator according to the present invention will be described.

  In order to carry the inner cylinder part 4 into the mine, as shown in FIGS. 7A to 7C, a second for pulling the inner cylinder part is provided in the excavator outer cylinder part 2 left on the face side in the mine. One end of the wire rope 26 is fixed, and the other end of the second wire rope 26 is inserted into the pipe from the wire rope insertion port 8b at the rear of the wire rope penetrating pipe 8.

  Then, the screw plug 8a is opened, and the second wire rope 26 is pulled out from the wire rope outlet 8a 'of the wire rope penetrating pipe 8 provided at the tip of the excavator outer cylinder 2 to the inside of the mine.

  The other end portion of the second wire rope 26 is attached to the rear side of the inner cylinder portion 4 of the cutter driving body 3 through the hole 5a by removing the screw plug of the wire-rope through hole 5a of the screw plug structure provided in the partition wall 5. It is wound around the drum 23a of the winch 23 of the transport carriage 20 respectively. In this case, a fitting 26a that can extend or shorten the wire length may be provided at an appropriate position as necessary.

  By driving the winch motor 23b, the second wire rope 26 is wound around the drum 23a and the transport carriage 20 is moved. Along with this, the cutter driver 3 including the inner cylinder portion 4 is also outside the excavator. It moves to the cylinder part 2 side.

  Further, by driving the winch 23 and winding up the second wire rope 26, the inner cylinder portion 4 of the cutter driving body 3 is carried to a position where it can be joined to the outer cylinder portion 2 of the excavator, and finally the transport carriage The inner cylinder part 4 fixed to 20 is inserted into the excavator outer cylinder part 2.

  After insertion, the inner cylinder part 4 of the cutter driving body 3 is assembled and integrated with the outer cylinder part 2 of the excavator using the bolt 2f of the fixing device 2e.

  Then, if the one end part of the 2nd wire rope 26 fixed to the wire rope fixing | fixed part 2d is removed and the winch 23 is driven, the 2nd wire rope 26 can be collect | recovered.

  After the wire rope is collected, the wire rope outlet 8a ′ at the tip of the wire rope insertion tube 8 remains as it is, but the wire rope insertion port 8b is closed by screwing from the inside of the well, and the wire rope through hole 5a of the partition wall 5 is closed. Screw the screw to close the hole.

  If the rear part 15b is connected to the front part 15a of the earth removing device 15 on the back surface of the partition wall 5, and the direction correction jack 17 and other equipment necessary for excavation are incorporated, the function of the excavator can be restored and the excavator can be reached. It can be made to return to the ground.

  These series of operations can be performed without the operator entering the face side.

  When the target reaching part is reached, the inner cylinder part 4 of the cutter driver 3 can be recovered in the same manner. In the present invention, the inner cylinder part 4 collected in the next construction is used and assembled to the newly produced outer cylinder part, so that it can be restored as a new excavator, which is economical.

  When it is necessary to apply a large force when the inner cylinder portion 4 of the cutter driver 3 is inserted into the outer cylinder portion 2 of the excavator, the reaction force base 27 may be used as an auxiliary as shown in FIG. .

  The reaction force base 27 is provided with an appropriate number of push-in jacks 28 at the front portion to push the transport cart 20 with the tip abutting against the rear portion of the transport cart 20. An appropriate number of reaction force jacks 29 are provided at the rear of the reaction force frame 27. The reaction force jack 29 is supported at the base end by a support portion 30 attached to the reaction force mount 27, the jack body is housed in a cylindrical guide case 31, and the tip of the reaction force jack 27 is the inner surface of the propulsion tube 2a. The conveying jack 20 is pushed in through the jack 28 while driving the pushing jack 28 to bring it into contact and taking the reaction force, so that the inner cylinder portion 4 is securely inserted into the outer cylinder portion 2 of the excavator. Can be inserted.

  This construction method is a tunnel with a relatively small diameter that prevents a prime mover having a predetermined capacity and shape from entering the pipeline when it is difficult for a person to enter the face of the work face due to work space restrictions. In addition, the effect can be exhibited when the tunnel extension is relatively short, for example, 200 m or less.

  The present invention can be applied to a construction method using any closed type mechanical excavator such as a mud type excavator, a mud cave excavator, and a mud-type mud pressure excavator.

(A) is explanatory drawing which shows the state in which the excavating machine during excavation has approached the obstacle, (b) is a front view of the excavating machine, and (c) is an enlarged explanation of the portion of the excavating machine outer cylinder portion in (a). The figure is shown. (A) is a side view of the conveyance truck, (b) is a plan view. FIG. 1 (a) shows a state in which a part of the earth removing device, the earth and sand pump, the direction correcting jack and the like are removed from the excavator. It is explanatory drawing which shows the state of the stage before carrying a conveyance trolley in a horizontal shaft, connecting with the inner cylinder part of a cutter drive body, and pulling out a cutter drive body to the starting vertical shaft side. The state which pulls out a cutter drive body to the start shaft side is shown. It is explanatory drawing which shows a mode that the obstruction was cut | disconnected. In the reassembly method of the present invention, (a) is an explanatory view showing a state in which a cutter driving body and a connected transport carriage are carried into a propelling pipe and pulled to the face side, and (b) is in FIG. 6 (a). An enlarged explanatory view of a portion A, (c) is a partially enlarged explanatory view of a partition wall. It is explanatory drawing which shows the state by which a cutter drive body is drawn in to the excavator outer cylinder part left in the vicinity of a face via a conveyance cart. It is explanatory drawing which shows the state which inserted the cutter drive body in the digging machine outer cylinder part, and reassembled the digging machine. The 2nd Example of this invention in the case where it is necessary to apply big force at the time of cutter drive body mounting to an excavator outer cylinder part is shown.

DESCRIPTION OF SYMBOLS 1 Excavator 2 Excavator outer cylinder part 2a Space part 2b Inner cylinder attaching part 2c Rear cylinder 2d Wire rope fixing part 2e Fixing device 2f Bolt 2A Propulsion pipe 3 Cutter drive body 4 Inner cylinder part 5 Bulkhead 5a Wire rope through-hole 6 Cutter Head 7 Cutter drive unit 8 Wire rope through tube 8a Screw plug 8a 'Wire rope outlet 8b Wire rope insertion port 9 Drive shaft 10 Boss 11, 11a Bit 12 Agitation blade 13 Cutter spoke 14 Face chamber 15 Earth removal device 15a Front 15b Rear part 16 Sediment pressure pump 17 Direction correction jack 18 Obstacle 19 Ground improvement section 20 Carriage truck 20a Carriage frame front part 20b Carriage frame bottom part 20c Carriage frame upper part 20d Winch mounting plate 21 Wheel 22 Holding wheel 23 Winch 23a Drum 23b Winch motor 24 Wire Low Mounting portion 24a wire rope through hole 25 first wire rope 26 second wire rope 26a joint fitting 27 reaction force frame 28 push the jack 29 reaction force jack 30 supporting portion 31 guide case

Claims (3)

A digging machine in which an inner cylinder part constituting the cutter driving body is detachable is digged inside the outer cylinder part of the digging machine, and at a predetermined digging position, from the outer cylinder part of the digging machine, the cutter driving body Separate the inner cylinder,
The engraver outer cylinder part is left behind,
After removing the excavation equipment in the propulsion pipe so that the carriage can be carried from the start shaft into the propulsion pipe, connected to the inner cylinder, and pulled out,
Connecting the transport carriage to the rear part of the inner cylinder part,
In the method of recovering excavator you recover cylindrical portion in constituting the lead said cutter driving member to the starting pit by traction means the transport carriage,
Pull the cutter driver and the transport carriage connected thereto into the propulsion pipe,
A winch is mounted on the transport carriage, one end of a second wire rope is fixed to the outer cylinder portion of the excavator, the other end of the second wire rope is connected to the winch, and the second wire is connected with the winch. Hoisting the rope and bringing the cutter drive body and the transport carriage closer to the outer cylinder of the excavator,
The inner cylinder part of the cutter driving body is inserted into the outer cylinder part of the excavator and integrated,
Remove one end of the second wire rope, wind up with the winch and collect,
A reassembling method for an excavator, wherein the carriage is separated from the inner cylinder portion, the excavator is reassembled, and re-startable. 2. The re-assembly method for an excavator according to claim 1, wherein a wire rope penetrating pipe is provided along a length direction in the excavator outer cylinder, and one end portion of the second wire rope is an excavator outer cylinder. It is fixed to the wire rope fixing part of the part, and the other end part is pulled out from the front part of the wire rope penetrating pipe and connected to the winch through the wire rope through hole provided in the partition wall of the inner cylinder part. A reassembling method for a special excavator . 2. The re-assembly method for an excavator according to claim 1 , wherein when the inner cylinder portion is inserted into the outer cylinder portion of the excavator, a reaction force stand is provided behind the transfer carriage, and a push-in jack provided on the reaction force stand is provided. reassembly method of excavator, characterized in that to fit the inner cylinder portion pushing the transport carriage to the excavation outside cylindrical portion by.

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