JP2009046804A - Drilling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently construct a desired pipeline by rotatively driving a rotary table by a constant driving force through the use of a water-cooled motor, which does not cause a fluctuation in output, as a driving means for rotatively driving the rotary table. <P>SOLUTION: This drilling machine 1 pushes in a buried pipe 25 while excavating ground, so as to form the pipeline out of the buried pipe 25 in the ground. The drilling machine 1 is equipped with a drilling unit 2 which is provided in the buried pipe 25 and composed of a leading body 3 and a holding body 15, and a propelling device which imparts a propelling force to the drilling unit 2. The leading body 3 comprises: the rotary table 5 which is rotatably provided at a propelling-direction leading end; a driving means 6 for rotatively driving the rotary table 5; and at least one of the drilling bits 10 and 11 which are provided on the rotary table 5 so as to be rotatable integrally with the rotary table 5. The driving means 6 for the rotary table 5 has the water-cooled motor 7 which does not cause the fluctuation of the output. The output of the water-cooled motor 7 is imparted to the rotary table 5, so as to rotatively drive the rotary table 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an excavating machine, and more particularly, to an excavating machine effective for press-fitting a buried pipe while excavating into the ground and constructing a pipe line using the buried pipe in the ground.

  There are various types of construction methods for constructing pipelines by press-fitting buried pipes into the ground. For example, in Patent Document 1, a start shaft is provided in the ground portion corresponding to the start end of the pipeline, and the end is provided. A reaching shaft is installed in the corresponding ground part, and an excavator is installed in the starting shaft, and a propelling pipe (buried tube) is pressed into the ground while excavating the ground from the starting shaft to the reaching shaft by the operation of the excavator. Discloses a construction method configured to construct a series of pipes that communicate between a start shaft and a reaching shaft.

In this case, the excavator includes a propulsion device composed of a hydraulic cylinder or the like, an inner tube provided in the propulsion tube, a excavation bit provided at a tip portion of the inner tube, and a driving unit that rotationally drives the inner tube. The propulsion device is installed inside the start shaft, the proximal end of the propulsion pipe is connected to the propulsion device, and the ground is directed from the start shaft to the arrival shaft by cooperation of the propulsion device and the excavator. By inserting the buried pipe while digging, a series of pipe lines communicating with the ground between the starting shaft and the reaching shaft can be constructed.
JP 7-293193 A

  By the way, in the excavator used for the above construction method, since the hydraulic drive source is used for the rotating disk, the output of the drive source fluctuates due to the pulsation of the hydraulic pressure, and a constant driving force is generated. It cannot be applied to the rotating disk, and it becomes difficult to press-fit the buried pipe while excavating the ground efficiently.

  The present invention has been made in view of the conventional problems as described above, and an excavator that can always apply a constant driving force to a rotating disk and can efficiently construct a desired pipeline. The purpose is to provide.

In order to solve the above problems, the present invention employs the following means.
That is, the invention according to claim 1 is an excavator for forming a pipe line by the buried pipe in the ground by press-fitting the buried pipe while excavating the ground, and a leading conductor provided in the buried pipe, A drilling device comprising a holding body, and a propulsion device that imparts a propulsive force to the drilling device,
The leading conductor includes at least one rotating plate provided rotatably at the tip in the propulsion direction, driving means for rotating the rotating plate, and at least one provided on the rotating plate and rotatable integrally with the rotating plate. It comprises an excavation bit, and the driving means of the rotating disk has a water cooling motor.

  According to the excavator according to the present invention, the rotating disk is driven to rotate by the driving means, and in this state, the driving force is applied to the excavator by the propulsion device, so that the excavation bit is rotated integrally with the rotating disk so that the ground is Excavated. In this case, since the drive means of the rotating disk has a water cooling motor, the output does not fluctuate, and a constant driving force can always be applied to the rotating disk, and the ground is efficiently excavated. Therefore, the buried pipe can be press-fitted and a desired pipe line can be efficiently constructed.

  The invention according to claim 2 is the excavator according to claim 1, wherein a speed reducer is connected to the output shaft of the water cooling motor, and the rotating disk is connected to the output shaft of the speed reducer via a rotary joint. It is connected.

  According to the excavator according to the present invention, when the water-cooled motor is operated, the output of the water-cooled motor is decelerated by the speed reducer and transmitted to the rotating disk via the rotary joint, and the rotating disk is rotationally driven and integrated with the rotating disk. The excavation bit is driven to rotate, and the ground is excavated.

  As described above, according to the excavator of the present invention, the driving means of the rotary disk of the excavator has the water cooling motor, so that the output does not fluctuate and always has a constant driving force. The buried pipe can be press-fitted while excavating the ground efficiently, and a desired pipe line can be efficiently constructed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 7 show an embodiment of an excavating machine according to the present invention. The excavating machine 1 presses an embedded pipe 25 into the ground while excavating the ground and uses the embedded pipe 25 in the ground. It is effective for constructing a series of pipelines, and includes a drilling device 2 for excavating the ground, and a propulsion device (not shown) for propelling the drilling device 2 and the buried pipe 25.

  The propulsion device is not particularly limited as long as the propulsion device has a function of propelling the buried pipe 25 and the excavation device 2, and includes, for example, a propulsion mount, a propulsion jack provided on the propulsion mount, and a drive source for driving the propulsion jack. You can use what you have.

  The propulsion device is installed at the bottom of a start shaft (not shown) provided on the ground. In this state, the buried pipe 25 and the excavation device 2 are set on the propulsion frame, and the excavation device 2 is operated by a propulsion jack. By applying a propulsive force to the buried pipe 25 and the excavator 2, the buried pipe 25 is press-fitted into the ground while excavating the ground toward the reaching vertical shaft (not shown) provided on the ground, and reaches the starting shaft in the ground. Construct a series of pipelines that communicate with the shaft.

  The excavator 2 is integrally connected to the front conductor 3 provided on the front end side in the propulsion direction in the buried pipe 25 and the rear end side in the propulsion direction of the front conductor 3, and the front conductor 3 is connected to the inner surface of the buried pipe 25. It is comprised from the holding body 15 which hold | maintains to the side and takes the reaction force at the time of rotation of the rotary disk 5 mentioned later of the front conductor 3. FIG.

  As shown in FIGS. 1 to 4, the leading conductor 3 is a cylindrical leading conductor casing 4 that is inserted into the buried pipe 25, and a turntable that is rotatably provided at the leading end of the leading conductor casing 4 in the propulsion direction. 5, drive means 6 provided in the leading conductor casing 4 for rotationally driving the turntable 5, a fixed excavation bit 10 provided on the turntable 5 and rotatable integrally with the turntable 5, and an expansion / contraction excavation bit 11 It has.

  A seal member (not shown) is interposed between the inner peripheral surface of the buried pipe 25 and the outer peripheral surface of the leading conductor casing 4. The seal member seals between the two and acts on the excavator 2 from the ground side. It is prevented that the muddy water etc. which flows into the starting shaft side through both.

  The turntable 5 has a disk shape that is substantially the same diameter as the outer diameter of the leading conductor casing 4, and is connected to driving means 6 provided in the leading conductor casing 4. The rotary disk 5 is configured to be driven to rotate around the axis of the leading conductor casing 4, and the fixed excavation bit 10 and the expansion / contraction excavation bit 11 described later are integrally driven to rotate.

  The drive means 6 includes a water cooling motor 7 provided inside the leading conductor casing 4 and a speed reducer 8 connected to the output shaft of the water cooling motor 7. The drive means 6 rotates on the output shaft of the speed reducer 8 via the rotary joint 9. The board 5 is connected, and the fixed excavation bit 10 and the expansion / contraction excavation bit 11 are rotationally driven integrally with the rotary board 5 via the speed reducer 8 by driving the water cooling motor 7.

  The fixed excavation bit 10 includes a pair of inner fixed excavation bits 10a disposed opposite to each other centering on the center of the rotating disc 5 at the center of the front end surface in the propulsion direction of the rotating disc 5, and A pair of outer fixed excavation bits 10b disposed opposite to each other around the center of the rotating disk 5 are provided at the periphery, and the propulsion direction of the excavator 2 is achieved by the cooperation of the inner fixed excavation bit 10a and the outer fixed excavation bit 10b. The ground on the front side of is excavated.

  The expansion / contraction excavation bit 11 is disposed opposite to the outer peripheral portion of the rotating disk 5 with the center of the rotating disk 5 as the center, and the expansion / contraction means 12 provided in the rotating disk 5 operates in the radial direction of the rotating disk 5. It is comprised so that it may expand and contract.

  The expansion / contraction means 12 drives the expansion / contraction jack 13 having a drive portion 13 a that can reciprocate in the radial direction of the rotating disk 5, the bit attachment portion 13 b attached to the tip of the drive portion 13 a of the expansion / contraction jack 13, and the expansion / contraction jack 13. A driving source (not shown) is provided, and the expansion / contraction excavation bit 11 is attached to the bit attachment portion 13b.

  The expansion / contraction excavation bit 11 has a substantially disc shape having a plurality of blade portions on the surface, and is supported in a circular support hole 5a provided in the outer peripheral portion of the rotating disc 5 so as to be capable of expansion / contraction. The space between the housing position where the entirety is accommodated in the support hole 5a and the projecting position where the surface portion projects from the support hole 5a can be expanded and contracted.

  In this case, the gap between the expansion / contraction excavation bit 11 and the support hole 5a of the rotating disk 5 is set to a very small size that allows expansion / contraction of the expansion / contraction excavation bit 11 and prevents biting of earth and sand or crushed powder. Sediment, crushed powder, etc. are prevented from biting into the drive part 13a of the expansion / contraction jack 13.

  The expansion / contraction excavation bit 11 is positioned at the projecting position by the operation of the expansion / contraction jack 13, and the rotary disc 5 and the expansion / contraction excavation bit 11 are rotationally driven integrally by rotating the rotary disc 5 in this state. The ground outside the surface is excavated, or obstacles such as existing buried pipes buried in the ground are crushed.

  The turntable 5 is provided with a plurality of through holes 5b penetrating the turntable 5 in the propulsion direction (thickness direction), and the fixed excavation bit 10 (the inner fixed excavation bit 10a and the outer fixed excavation) is provided through the through hole 5b. Bits 10b) and crushing powder of obstacles such as existing buried pipes crushed by excavating the ground by the expansion / contraction excavation bit 11 are guided to the inside of the leading conductor casing 4, and the leading conductor casing 4 It is discharged to the start shaft side by vacuum suction through the discharge pipe 20 arranged inside.

  A predetermined gap 14 is provided between the rear end surface of the rotating disk 5 in the propulsion direction and the front end surface of the leading conductor casing 4 in the propulsion direction, and the ground is excavated by the expansion / contraction excavation bit 11 through the gap 14. The crushed powder of obstacles such as the generated earth and sand and the crushed existing buried pipe is led into the inside of the leading conductor casing 4 and discharged to the start shaft side by vacuum suction through the discharge pipe 20.

  In this case, a crusher portion 14a that sequentially narrows the gap 14 from the inlet side toward the outlet side is provided on the inner peripheral surface portion of the leading conductor casing 4 facing the gap 14 and the rear end surface portion of the turntable 5. The crusher portion 14a further pulverizes earth and sand, crushed powder, etc., is guided to the inside of the leading conductor casing 4, and is discharged to the start shaft side through the discharge pipe 20.

  As shown in FIGS. 5 to 7, the holding body 15 includes a cylindrical holding body casing 16, a clamp 17 that is provided on the outer peripheral portion of the holding body casing 16, and can be expanded and contracted in the radial direction of the holding body casing 16. 1 is provided with expansion / contraction means 18 for expanding / contracting the clamp 17, and as shown in FIGS. 1 and 2, the front end of the holding casing 16 in the digging direction is digging of the leading conductor casing 4. Connected to the rear end of the direction by screws.

  The clamps 17 are provided at four positions on the outer peripheral portion of the holding body casing 16 at intervals of 90 degrees, the storage position where the surface is flush with the outer peripheral surface of the holding body casing 16, and the outer surface of the holding body casing 16. It is configured to be able to expand and contract between a projecting position that protrudes outward by a predetermined amount, and reciprocates between the storage position and the projecting position by expanding and contracting by the operation of the expanding and contracting means 18.

  The clamp 17 has an arcuate plate shape, and is formed in a curved surface having a curvature that is flush with the outer peripheral surface of the holder casing 16 in a state where the clamp 17 is positioned at the storage position. An uneven portion 17a is provided on the surface of the clamp 17 by knurling or the like, and when the surface of the clamp 17 is brought into contact with the inner surface of the embedded tube 25 by the uneven portion 17a, the frictional force between both is increased, and the holding body 15 and the leading conductor 3 are prevented from rotating relative to the buried pipe 25.

  The expansion / contraction means 18 includes an expansion / contraction jack 19, a clamp mounting portion 19 b provided at the tip of the drive portion 19 a of the expansion / contraction jack 19, and a drive source (not shown) that drives the expansion / contraction jack 19. By driving 19, the clamp 17 expands and contracts integrally with the drive unit 19a, and the clamp 17 reciprocates between the storage position and the protruding position, and the surface of the clamp 17 abuts against the inner surface of the embedded tube 25 at the protruding position. The surface of the clamp 17 is separated from the inner surface of the buried tube 25 at the storage position.

  And in order to press-in the buried pipe 25 while excavating the ground using the excavator 1 according to the present embodiment configured as described above, a propulsion device is installed at the bottom of the start-up shaft provided on the ground, and the propulsion device The excavator 2 and the buried pipe 25 are set on the propulsion base. In this case, the leading conductor 3 and the holding body 15 of the excavator 2 are incorporated in advance in the buried pipe 25.

  Then, the expansion / contraction jack 19 of the holding body 15 is operated to bring the clamp 17 into contact with the inner surface of the embedded tube 25, and the leading conductor 3 is held on the inner surface side of the embedded tube 25 via the holding member 15. The leading conductor casing 4 is prevented from rotating relative to the buried pipe 25 when the turntable 5 rotates.

  Then, the water-cooling motor 7 of the leading conductor 3 is operated to rotate and drive the fixed excavation bit 10 (the inner fixed excavation bit 10a and the outer fixed excavation bit 10b) and the expansion / contraction excavation bit 11 integrally with the turntable 5 and propel in this state. By operating the propulsion jack of the apparatus, the excavator 2 is propelled toward the reaching shaft provided in the ground integrally with the buried pipe 25, and the fixed excavation bit 10 (the inner fixed excavation bit 10a and the outer fixed excavation bit 10b) and the expansion / contraction excavation The underground pipe 25 is pressed into the ground while excavating the ground in cooperation with the bit 11.

  In this case, earth and sand generated by excavating the ground on the front side in the propulsion direction of the excavator 2 is guided to the inside of the leading conductor casing 4 through the through hole 5 b of the rotating disk 5, and through the discharge pipe 20. It is discharged to the start shaft side by vacuum suction. Alternatively, the lead is introduced into the lead conductor casing 4 through the gap 14 between the turntable 5 and the lead conductor casing 4, and is discharged to the start shaft side by vacuum suction through the discharge pipe 20.

  Further, the expansion / contraction excavation bit 11 is expanded / contracted by the operation of the expansion / contraction jack 13 according to the condition of the ground to excavate the ground outward in the radial direction from the outer peripheral surface of the rotating disk 5, or is already embedded in the ground Crush obstacles such as buried pipes. Sediment, crushed powder, and the like generated at this time are guided to the inside of the leading conductor casing 4 through the gap 14 between the rotating disk 5 and the leading conductor casing 4, and are brought to the start shaft side by vacuum suction through the discharge pipe 20. Discharged.

  Then, while excavating the ground with the excavator 2 as described above, the buried pipe 25 is sequentially added and press-fitted into the ground, so that the buried pipe 25 extends over the entire length between the starting vertical shaft and the reaching vertical shaft. Can be embedded, and a series of pipelines can be constructed in that portion.

  In the excavator 1 according to the present embodiment configured as described above, the water cooling motor 7 whose output does not fluctuate is used for the driving means 6 of the rotary disk 5 of the leading conductor 3 of the excavator 2, so A constant driving force can be applied to the rotating disk 5, the buried pipe 25 can be press-fitted into the ground while the ground is efficiently excavated, and a series of pipelines by the buried pipe 25 can be efficiently constructed. .

  In the above description, four fixed excavation bits 10 (an inner fixed excavation bit 10a and an outer fixed excavation bit 10b) are provided on the front end surface of the turntable 5 in the excavation direction, and two expansion / contractions are provided on the outer peripheral portion of the turntable 5. Although the excavation bit 11 is provided, three or less fixed excavation bits 10 are provided on the front end surface of the turntable 5, and one or more expansion / contraction excavation bits 11 are provided on the outer peripheral portion of the turntable 5. Good.

It is the schematic which showed one Embodiment of the excavation machine by this invention, Comprising: It is a longitudinal cross-sectional view of the front conductor of an excavation apparatus. It is a left view of what is shown in FIG. It is A arrow directional view of FIG. FIG. 4 is a left side view of FIG. 3. It is a top view of the holding body of a digging apparatus. It is the elements on larger scale of FIG. It is the sectional view on the AA line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Excavator 2 Excavator 3 Lead conductor 4 Lead conductor casing 5 Turntable 5a Support hole 5b Through hole 6 Drive means 7 Water cooling motor 8 Reducer 9 Rotary joint 10 Fixed drill bit 10a Inner fixed drill bit 10b Outer fixed drill bit 11 Expansion / contraction Excavation bit 12 Expansion / contraction means 13 Expansion / contraction jack 13a Drive part 13b Bit attachment part 14 Gap 14a Crusher part
DESCRIPTION OF SYMBOLS 15 Holding body 16 Holding body casing 17 Clamp 17a Uneven part 18 Expansion / contraction means 19 Expansion / contraction jack 19a Drive part 19b Clamp attachment part 20 Drain pipe 25 Embedded pipe

Claims (2)

An excavator that presses a buried pipe while excavating the ground to form a pipeline by the buried pipe in the ground,
A drilling device comprising a leading conductor and a holding body provided in the buried pipe;
A propulsion device for applying a propulsive force to the excavator,
The leading conductor is provided at a tip of the propulsion direction so as to be rotatable, a driving means for rotationally driving the rotating disc, and at least one excavation provided on the rotating disc and rotatable integrally with the rotating disc. A bit and
An excavating machine characterized in that the driving means of the rotating disk has a water cooling motor.   2. The excavator according to claim 1, wherein a reduction gear is connected to an output shaft of the water cooling motor, and the rotating disk is connected to the output shaft of the reduction gear via a rotary joint.

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