JP2017227067A - Boring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that rotation of a rotation part on a swivel is obstructed due to resistance by excavated soil etc. and a hose supplying work oil to the apparatus entangles, since the swivel is merely rotatably arranged on a fixed part.SOLUTION: There is provided a boring apparatus, in which, in a swivel 2 supplying fluid by a hose 50 to a drive source G of an apparatus T for boring ground of a boring apparatus 1 suspended with a wire 8, the swivel 2 is so configured that a vertical shaft 45 comprising a flow path 48 in its inner section is attached on upper part of a section of the rotating apparatus T of the boring apparatus 1 via a synchronization mechanism 57 comprising a synchronization motor 60 providing reverse rotation in a synchronized manner with the rotating apparatus T and the rotation of the synchronization motor 60 is controlled with a gyro sensor 70, so that the swivel 2 is stable relatively to the apparatus T.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a drilling device.

2. Description of the Related Art Conventionally, a configuration in which a drilling device is inserted into a casing press-fitted into the ground by a casing rotary press-fitting device and rotated together with the casing to perform excavation is known (see Patent Document 1).
Conventionally, a configuration in which a gyro sensor is provided in an excavation head of an earth auger to correct the inclination of the earth auger is known (see Patent Document 2).

Japanese Patent No. 4811654 JP 2001-254388 A

Among the known examples, the former is an excavator used in the so-called GSB method, and a swivel is provided to supply hydraulic oil from the fixed part to the rotating part, but the swivel simply rotates relative to the fixed part. Since it is provided only freely, there is a problem that the rotation of the swivel rotating part is hindered due to the resistance of the excavated earth and sand, and the hose that supplies hydraulic oil to the equipment is entangled.
In addition, when excavation resistance exceeding the allowable torque is applied, the gripper of the excavator slips to prevent the torque of the rotary press-fitting device from being transmitted, but there is a problem that the swivel cannot follow this slip and the hose becomes entangled.
In addition, it is configured to measure the depth by detecting the feeding length of the hydraulic hose, but if the hydraulic hose gets tangled, the depth cannot be detected, the excavation work is interrupted and the excavator is lifted to fix the entanglement, There is also a problem that excavation accuracy and construction efficiency are greatly reduced.
Of the known examples, the latter is intended to correct the inclination of the earth auger and cannot prevent the hose from becoming entangled.
In the present application, the entanglement of the hose is prevented by devising the configuration of the swivel.

The invention of claim 1 is a swivel 2 for supplying a fluid by a hose 50 to a driving source G of a device T for excavating the ground of the excavator 1 suspended by a wire 8. The swivel 2 is a rotation of the excavator 1. A gyro sensor is attached to the upper part of the part of the device T to be rotated via a tuning mechanism 57 having a tuning motor 60 that rotates the vertical axis 45 having a flow path 48 in synchronization with the rotating device T in reverse. The excavator is configured such that the rotation of the tuning motor 60 is controlled by 70 and the swivel 2 is configured to be stationary with respect to the device T.
According to a second aspect of the present invention, the tuning mechanism 57 is configured such that a rotating body 58 provided on the vertical axis 45 is rotated by a tuning motor 60, and the rotating body 58 includes the tuning motor 60 and the tuning motor. The output gear 61 of 60 is provided, the passive gear 62 meshing with the output gear 61 is provided on the equipment T side, the vertical axis 45 is mounted on the bearing portion 55 provided in the excavator 1, and the output of the tuning motor 60 is output. The gear 61 is configured to revolve around the passive gear 62, and the swivel 2 has a hose 50 and a hose support arm 51 attached to a vertical axis 45 above the bearing portion 55 and below the bearing portion 55. A branch cylinder 47 is attached to the longitudinal axis 45 of the portion, and a tuning mechanism 57 is provided between the hose support arm 51 and the bearing portion 55, and the rotating body 58 of the tuning mechanism 57 includes an upper plate 66 and a lower plate 67. Up and down at predetermined intervals The output gear 61 and the passive gear 62 are disposed between the upper plate 66 and the lower plate 67, and the tuning motor 60 of the tuning mechanism 57 is a rotating body. 58. The tuning motor case 65 is mounted on the lower surface side of the lower plate 67, and the excavator 1 is a casing K press-fitted into the ground by the casing rotary press-fitting device 5. The excavator 1 is inserted into the casing K and integrally rotated together with the casing K. The excavator 1 includes at least the holding and fixing device 10 that fixes the excavator 1 to the casing K and rotates the excavator 1 to constitute the device T, and The holding and fixing device 10 has an enlarged wing 18 that constitutes the device T and is rotatably attached to the holding and fixing frame 11 side by the attachment shaft 17. The excavator is configured such that each of the entrance / exit cylinder 13 that moves in and out in the shooting direction and the expansion / contraction cylinder 19 that expands / contracts the front expansion blade 18 is a drive source G, and fluid is supplied to the drive source G by the swivel 2. It is.
According to a third aspect of the present invention, the tuning mechanism 57 is configured such that a rotating body 58 provided on the vertical axis 45 is rotated by a tuning motor 60, and the rotating body 58 includes the tuning motor 60 and the tuning motor. The output gear 61 of 60 is provided, the passive gear 62 meshing with the output gear 61 is provided on the equipment T side, the vertical axis 45 is mounted on the bearing portion 55 provided in the excavator 1, and the output of the tuning motor 60 is output. The gear 61 is an excavator configured to revolve around the passive gear 62.
In the invention of claim 4, the swivel 2 has a hose 50 and a hose support arm 51 attached to the vertical axis 45 above the bearing portion 55, and a branch cylinder 47 attached to the vertical axis 45 below the bearing portion 55. The excavator is configured such that a synchronization mechanism 57 is provided between the hose support arm 51 and the bearing portion 55.
According to a fifth aspect of the present invention, the rotating body 58 of the tuning mechanism 57 is formed in a thick case shape by arranging an upper plate 66 and a lower plate 67 at a predetermined interval in the vertical direction. The output gear 61 and the passive gear 62 are disposed between the plates 67, and the tuning motor 60 is built in a tuning motor case 65 provided on the rotating body 58. The excavator is attached to the lower surface side of the lower plate 67.
The invention of claim 6 is configured such that the excavator 1 is inserted into the casing K press-fitted into the ground by the casing rotary press-fitting device 5 and rotates integrally with the casing K. The excavator 1 includes at least the casing K. The excavator 1 is fixed to the excavator 1 and integrally rotated to hold the holding and fixing device 10 constituting the device T, and the device T is rotatably attached to the holding and fixing frame 11 side of the holding and fixing device 10 by an attachment shaft 17. And an expansion / contraction cylinder 19 that expands / contracts the front expansion blade 18 is a drive source G. The excavator is configured to supply a fluid to the drive source G by the swivel 2.

In the first aspect of the invention, the rotation of the tuning motor 60 for rotating the vertical axis 45 of the swivel 2 by the tuning mechanism 57 is controlled by the gyro sensor 70 that detects the rotation and the rotation direction with respect to the device T. 2 can be improved, thereby preventing the hose 50 from being entangled.
According to the second aspect of the present invention, the rotating body 58 provided on the vertical axis 45 is synchronously driven and rotated in the opposite direction to the rotation of the excavator 1 by the tuning motor 60, so that the entanglement of the hose 50 can be prevented. 58, the tuning motor 60 and the output gear 61 are revolved around the passive gear 62 and rotated in the opposite direction so that the tuning mechanism 57 can be compactly configured, and the rotation and rotation direction of the rotating body 58 can be detected. Since the rotation of the tuning motor 60 is controlled by the gyro sensor 70, it is possible to improve the tuning rotation accuracy of the swivel 2 by the tuning mechanism 57, thereby improving the entanglement prevention accuracy of the hose 50, In the swivel 2, the hose 50 and the hose support arm 51 are attached to the vertical axis 45 above the bearing portion 55, and the vertical axis 45 below the bearing portion 55. Since the branch cylinder 47 is attached and the synchronization mechanism 57 is provided between the hose support arm 51 and the bearing portion 55, the swivel 2 and the synchronization mechanism 57 can be configured in a compact manner, and the occurrence of the entanglement of the hose 50 can be prevented. Further, the output gear 61 and the passive gear 62 are arranged in a rotating body 58 formed in a case shape by the upper plate 66 and the lower plate 67, and the tuning motor 60 is built in the tuning motor case 65. The rotating portion of the synchronization mechanism 57 is surrounded and can be avoided from the influence of the earth and sand, the synchronization rotation accuracy can be improved, and the occurrence of the entanglement of the hose 50 of the excavating apparatus 1 having the holding and fixing device 10 and the expanding blade 18 Can be prevented.
According to the third aspect of the present invention, the rotating body 58 provided on the vertical axis 45 is synchronously driven and rotated in the opposite direction to the rotation of the excavator 1 by the tuning motor 60, so that the entanglement of the hose 50 can be prevented. In 58, the tuning motor 57 and the output gear 61 are revolved around the passive gear 62 and rotated in the opposite direction, so that the tuning mechanism 57 can be made compact.
In the invention of claim 4, the swivel 2 has the hose 50 and the hose support arm 51 attached to the vertical axis 45 above the bearing portion 55, and the branch cylinder 47 attached to the vertical axis 45 below the bearing portion 55. Since the synchronization mechanism 57 is provided between the support arm 51 and the bearing portion 55, the swivel 2 and the synchronization mechanism 57 can be configured compactly, and the occurrence of entanglement of the hose 50 can be prevented.
In the fifth aspect of the present invention, the output gear 61 and the passive gear 62 are arranged in the rotating body 58 formed in a case shape by the upper plate 66 and the lower plate 67, and the tuning motor 60 is placed in the tuning motor case 65. Since it is built-in, the rotating portion of the tuning mechanism 57 is surrounded by the rotating body 58 and can be avoided from the influence of earth and sand, and the synchronized rotation accuracy can be improved.
According to the sixth aspect of the present invention, it is possible to prevent the occurrence of the entanglement of the hose 50 of the excavator 1 having the holding and fixing device 10 and the enlarged blade 18.

The arrangement schematic diagram of a casing rotation press-fitting device, a fluid supply unit, and an excavator. The front view of the excavation device in a state where the casing rotary press-fitting device and the expansion blade are retracted. The front view which abbreviate | omitted a part of excavation apparatus with an expansion wing expanded state. Sectional drawing of swivel vicinity. The front view of the excavator with the expansion wing retracted. The top view of a swivel. Sectional drawing of a holding | maintenance fixing device.

An embodiment of the present invention will be described with reference to the drawings.
1 is a drilling device having a swivel 2 (FIGS. 1 and 2), and the swivel 2 is provided with various devices T or a drive source G of the device T provided with the fluid from a fluid supply unit 3 installed on the ground in the drilling device 1. To supply.
In this case, the fluid supplied to the swivel 2 is assumed to be water, hydraulic oil, or a soil improver, and the supply destination of the fluid is arbitrary, but will be described below with an example of hydraulic oil.
Moreover, although the structure of the excavator 1 and the various devices T of the excavator 1 is arbitrary, in this example, it demonstrates below by the example of the casing all-around turning type all casing construction method.

  Reference numeral 5 denotes a casing rotary press-fitting device for press-fitting a casing K into which the excavator 1 is inserted into the ground (FIGS. 1 and 2). The casing rotary press-fitting device 5 is installed on the ground W and the casing K is placed on the ground W. The structure is arbitrary as long as it can be press-fitted. Although not shown in the drawings, the base frame, a lifting frame that moves up and down relative to the base frame, a casing fixing mechanism that holds the casing K in a fixed state, and a casing K that is fixed by the casing fixing mechanism A casing drive rotation mechanism is provided to drive and rotate the casing K, and the casing K fixed by the casing fixing mechanism is press-fitted into the ground W while being rotated by the casing drive rotation mechanism.

Reference numeral 6 denotes a base machine boom which is inserted while the excavator 1 is suspended in the casing K in which the casing rotary press-fitting device 5 is press-fitted into the ground W. Reference numeral 8 denotes a wire hanging from the boom 6. The excavator 1 is a wire. 8 to hang.
The excavator (enlarged excavator) 1 is provided with a holding and fixing device 10 that rotates the excavator 1 together with the casing K. The holding and fixing device 10 is provided with a plurality of contact bodies (stabilizers) 12 in the circumferential direction in the holding and fixing frame 11 so as to be able to enter and leave the holding and fixing frame 11 in the radial direction. An entrance / exit cylinder 13 (FIGS. 4 and 7) for allowing the abutment body 12 to enter and exit is provided, and the holding and fixing device 10 serves as the device T of the excavator 1, and the entrance / exit cylinder 13 serves as the drive source G.

The holding and fixing device 10 causes the abutment body 12 to abut against the inner surface of the casing K by the entrance / exit cylinder 13 to rotate the excavator 1 integrally with the casing K.
An upper part of the vertically moving frame 16 is attached to the holding and fixing frame 11 of the holding and fixing device 10 via a guide guide mechanism 15 described later so as to be movable up and down with respect to the holding and fixing frame 11. An upper part of the enlarged wing 18 is rotatably attached to the vertically moving frame 16 by an attachment shaft 17. The expansion wing 18 is formed to have a predetermined length in the vertical direction, and the horizontal axis rotates while excavating the ground to excavate the expansion hole in the ground.

Therefore, the expansion blade 18 becomes the equipment T of the excavator 1, and the expansion / contraction cylinder 19 that expands / contracts the expansion blade 18 becomes the drive source G.
One end of the expansion / contraction cylinder 19 is attached at a predetermined position between the upper and lower sides of the expansion blade 18, and the other end of the expansion / contraction cylinder 19 is attached to the vertical movement frame 16 side by the attachment shaft 20.
When the expansion / contraction cylinder 19 is extended, the expansion blade 18 is rotated outwardly about the attachment shaft 17, and the expansion blade 18 is inclined and expanded in a downwardly spread state located outside the outer diameter of the casing K. When the expansion / contraction cylinder 19 is contracted, the expansion blade 18 is stored in the casing K.

Moreover, the vertical excavation part 22 which comprises a part of expansion blade 18 by the attachment axis | shaft 21 is rotatably attached to the lower part of the expansion part 18A of the expansion blade 18 (FIG. 3). The vertical excavation part 22 excavates the enlarged cylindrical hole part 23B in a substantially vertical cylindrical shape below the slope 23A of the enlarged hole 23 excavated obliquely by the enlarged blade 18 rotated about the mounting shaft 17. is there.
An angle adjusting cylinder 25 for changing and adjusting the angle of the vertical excavation unit 22 is provided between the vertical excavation unit 22 and the enlarged blade 18. One end of the angle adjustment cylinder 25 is rotatably attached to the expansion blade 18, and the other end of the angle adjustment cylinder 25 is attached to the vertical excavation part 22 side.
When the angle adjustment cylinder 25 is reduced, the angle between the upper portion of the enlarged wing 18 and the vertical excavation portion 22 becomes smaller, and when the angle between the upper portion of the enlarged wing 18 and the vertical excavation portion 22 becomes smaller, The enlarged diameter increases.

Therefore, the angle adjustment cylinder 25 is expanded and contracted according to the maximum expansion diameter excavated by the expansion blade 18, and the angle between the expansion blade 18 and the vertical excavation part 22 is set in advance. During excavation work, the expansion and contraction of the angle adjustment cylinder 25 is stopped.
The expansion / contraction setting of the angle adjustment cylinder 25 is performed in a state where the excavator 1 is on the ground.
Therefore, the cylinder mounting member 27 is provided at the center position in the plan view of the holding and fixing frame 11 of the holding and fixing device 10, and one end side (upper end side) of the lifting cylinder 28 is mounted on the cylinder mounting member 27 (FIG. 3). An attachment member 29 is provided on the other end side (lower end side) of the cylinder 28, and the attachment member 29 is attached to the vertically moving frame 16 (FIG. 3).

That is, the attachment member 29 is formed in the shape of a shaft with a horizontal axis, the intermediate portion of the attachment member 29 is attached to the other end side of the elevating cylinder 28, and both ends of the attachment member 29 are attached to the vertical movement frame 16 side.
When the elevating cylinder 28 is extended, the mounting member 29 is lowered with respect to the holding and fixing frame 11, thereby lowering the vertical movement frame 16, and by lowering the vertical movement frame 16, the mounting shaft 17 is lowered. The base of the expansion wing 18 is lowered, and the lower end of the vertical excavation part 22 is lowered.

By synchronizing the extension amount of the elevating cylinder 28 and the extension amount of the expansion / contraction cylinder 19, the lower end of the vertical excavation portion 22 moves horizontally, and the cylindrical hole bottom surface 23 </ b> C of the expansion hole 23 is substantially set as described above. Drill horizontally.
That is, when the expansion blade 18 is simply rotated horizontally about the mounting shaft 17 for expansion excavation, the movement trajectory along which the lower end of the vertical excavation portion 22 moves becomes an arc surface, but the expansion / contraction cylinder 19 extends. Accordingly, the expanding blade 18 and the vertical excavation unit 22 are lowered by the lifting cylinder 28 to make the movement locus of the lower end of the vertical excavation unit 22 horizontal (FIG. 3).

Therefore, the vertical hole bottom surface 23F of the vertical hole 23E and the cylindrical hole bottom surface 23C of the enlarged cylindrical hole portion 23B are substantially horizontal, and the bottom surface of the enlarged bulb is leveled to improve the support capacity of the vertical pile and the enlarged bulb and increase the pulling resistance force. Let
In this case, the raising / lowering mechanism of the expansion blade 18 becomes the device T of the excavator 1, and the raising / lowering cylinder 28 becomes the drive source G.
A scraper 30 is provided in the vertical excavation unit 22. The scraper 30 is provided so as to protrude in the circumferential direction on the side surface in the rotational direction of the vertical excavation unit 22, and a sediment receiver 31 that collects the sediment collected by the scraper 30 is provided below the scraper 30. Reference numeral 32 denotes an opening / closing lid provided on the lower surface of the earth and sand receiver 31, and 33 denotes an operating lever for opening / closing the opening / closing lid 32.

Therefore, the guide guide mechanism 15 for guiding the up and down movement frame 16 is provided between the holding and fixing frame 11 of the holding and fixing device 10 and the up and down movement frame 16.
As shown in FIG. 3, a fixed-side cylinder portion 35 that protrudes downward is provided on the lower surface of the center of the holding and fixing frame 11, and the shaft-shaped cylinder is mounted in an upper mounting hole (not shown) of the fixed-side cylinder portion 35. The attachment member 27 is inserted and the upper end of the elevating cylinder 28 is attached. An outer cylinder portion 36 having a diameter larger than that of the fixed side cylinder portion 35 is fixedly attached to the upper portion of the fixed side cylinder portion 35. An inner cylinder part 37 is provided inside the outer cylinder part 36 so as to be movable only in the vertical direction. A bottom plate 38 is fixed to the inner cylindrical portion 37, and an intermediate portion of the moving side cylindrical portion 39 is fixed in the center of the bottom plate 38, and the moving side cylindrical portion 39 is freely movable up and down on the outer periphery of the fixed side cylindrical portion 35. Install in the mated state.

The upper part of the vertically moving frame 16 is fixedly attached to the bottom plate 38.
Either one of the outer cylinder part 36 and the inner cylinder part 37 is provided with an engagement recess 40 that is recessed in the radial direction with respect to the axial center of the outer cylinder part 36 and the inner cylinder part 37, and the other is provided with an engagement recess 40. The engaging convex portion 41 to be engaged is provided, and the vertical movement of the vertically moving frame 16 is guided by the action of the engaging concave portion 40 and the engaging convex portion 41 and the fitting configuration of the outer cylindrical portion 36 and the inner cylindrical portion 37.
The upper part of the support member 42 is fixedly attached to the lower part of the fixed side cylinder part 35, and the attachment part 43 of the earth and sand receiver 31 is attached to the lower part of the support member 42.

Therefore, the inner cylinder portion 37, the bottom plate 38, and the moving side cylinder portion 39 of the guide guide mechanism 15 are lowered with respect to the fixed side cylinder portion 35 and the support member 42, and the vertically moving frame 16 is lowered by the lowering of the bottom plate 38. .
Therefore, the swivel 2 is provided on the upper part of the excavator 1. The swivel 2 is configured such that a vertical axis 45 is rotatably mounted at the center position of the holding and fixing frame 11, and a branch cylinder 47 having a connection nozzle 46 is rotatably attached to a lower portion of the vertical axis 45.
That is, the hydraulic oil flow path 48 is formed in the vertical axis 45, and the swivel 2 supplies the hydraulic oil to the pipe branch cylinder 47 that rotates from the flow path 48 of the vertical axis 45 in the position-immobilized state. The hydraulic oil is supplied to the drive source G of each device T described above by the rotation side pipe 49 connected to the connection nozzle 46.

The tip of a hydraulic oil hose (hydraulic hose (piping)) 50 sent from the fluid supply unit 3 is connected to the upper portion of the flow path 48 of the vertical axis 45. A base portion of a hose support arm 51 is attached to an upper portion of the vertical axis 45, and an intermediate portion of the hose 50 is positioned on the lower surface side of the hose support arm 51, and the hose support arm 51 is freely extended and retracted. To support.
A bearing portion 55 that shafts the vertical axis 45 is provided at the upper center of the holding and fixing frame 11 of the holding and fixing device 10, and the pipe branch cylinder 47 is provided at a lower outer peripheral portion of the vertical axis 45 that projects downward from the bearing portion 55. Are fitted in a rotatable manner. A plurality of connection nozzles 46 of the branch cylinder 47 are arranged in parallel in the vertical direction and the rotation direction of the branch cylinder 47, and a base portion of a rotation side pipe 49 whose tip is connected to each device T is connected to each connection nozzle 46.

The swivel 2 is attached to the bearing portion 55 of the holding and fixing frame 11 via a tuning mechanism 57 that rotates reversely with respect to the holding and fixing frame 11 of the excavating apparatus 1 that rotates integrally with the casing K, and the hose 50 is always fixed in a predetermined manner. The hose 50 from the fluid supply unit 3 is prevented from being twisted or entangled by being positioned at a fixed position.
The tuning mechanism 57 rotates the rotary body 58 provided on the vertical axis 45 by the tuning motor 60, and rotates the vertical axis 45 in a direction opposite to the holding and fixing frame 11 by the rotation of the rotary body 58. The swivel 2 (vertical axis 45, hose support arm 51, rotator 58) and hose 50 are brought into a stationary state with respect to the rotating holding and fixing frame 11 (excavating device 1) by rotating in synchronization with each other. To prevent twisting.

An output gear 61 of a tuning motor 60 is attached to the rotating body 58, a passive gear 62 is engaged with the output gear 61, and the passive gear 62 is attached to the holding and fixing frame 11 side.
In order to facilitate understanding, the holding and fixing frame 11 will be described as being in a rotation stopped state. When the output gear 61 is rotated by the tuning motor 60, the output gear 61 rotates and rotates while the passive gear 62 on the holding and fixing frame 11 side rotates. As a result, the tuning mechanism 57 rotates the vertical axis 45 with respect to the holding and fixing frame 11, so that the output gear 61 actually rotates in the direction opposite to the rotation direction of the holding and fixing frame 11. The swivel 2 (vertical axis 45, hose support arm 51, rotary body 58) and hose 50 rotate by rotating and synchronizing the rotation speed of the holding and fixing frame 11 with the rotation speed of the vertical axis 45 and the rotary body 58. It is stationary with respect to the holding and fixing frame 11 (excavator 1).

Thus, the tuning motor 60 is built in a tuning motor case 65 provided on the rotating body 58, and the output gear 61 is positioned between the upper and lower sides of the tuning motor case 65 and the rotating body 58. In this example, the tuning motor 60 is positioned on the lower surface side of the rotating body 58 to prevent interference with the hose 50 and the hose support arm 51.
Further, the rotating body 58 is formed in a thick case (box) shape by arranging the upper plate 66 and the lower plate 67 in the vertical direction at a predetermined interval, and outputs between the upper plate 66 and the lower plate 67. The gear 61 is located.
The passive gear 62 meshing with the output gear 61 is fixed to the bearing portion 55 and disposed in the rotating body 58. A lower cylinder portion 68 is provided at the center of the lower plate 67 of the rotating body 58, and the lower cylinder is provided. The part 68 is rotatably fitted to the outer periphery of the bearing part 55.

Accordingly, the gyro sensor 70 is provided on the rotating body 58 side of the swivel 2. The gyro sensor 70 is configured to detect the rotation and the rotation direction of the rotating body 58, and the detection signal of the gyro sensor 70 is sent to a control device (not shown) for calculation processing. As a result, the rotation of the tuning motor 60 is detected. Control is performed so as to synchronize with the rotation of the holding and fixing frame 11.
The excavator 1 (casing K) is configured to rotate in both forward and reverse directions, and in response to this, the tuning motor 60 is configured by a so-called servo motor that rotates forward and backward.
Further, the gyro sensor 70 is provided in the tuning motor case 65 together with the tuning motor 60.

Thus, the bearing portion 55 fixes the lower portion of the bearing portion 55 to the upper portion of the upper cylindrical portion 75 concentric with the bearing portion 55, and the upper cylindrical portion 75 is fixed to the top plate 76 of the holding and fixing frame 11. The lower part of the upper cylinder part 75 is fixed to the fixed cylinder part 35.
A plurality of cylinder cases 77 projecting in a radial direction with respect to the axis of the holding and fixing frame 11 are arranged in parallel on the top plate 76 in the circumferential (rotating) direction, and the abutting body 12 is moved in and out of each cylinder case 77. Each cylinder 13 is built in, the inner end of the entrance / exit cylinder 13 is attached to the fixed portion of each cylinder case 77, and the contact body 12 is attached to the outer end side of the entrance / exit cylinder 13 (FIG. 6).
The contact body 12 is configured such that the expansion / contraction of the in / out cylinder 13 is guided by a cylinder case 77 to enter / exit.

In FIG. 1, 80 is an operation panel, 81 is a hose reel, 82 is a depth detector, 83 is a depth detection wire, and the depth detection wire 83 is supported by the hose support arm 51 together with the hose 50 so as to be extended and retractable. ing.
In the construction method in which a drill bit is formed at the lower end of the casing and fluid is supplied into the casing by the hose 50 while the casing is press-fitted by the casing rotary press-fitting device, the illustration is omitted on the upper portion of the casing, A rotation-side bearing portion 55 is provided, and a vertical axis 45 provided with a hose support arm 51 of the swivel 2 is mounted on the bearing portion 55 and a tuning mechanism 57 is provided. The swivel 2 is reversely rotated by the tuning mechanism 57 with respect to the casing. It is good also as a structure which supplies fluids, such as water, in a casing by the swivel 2, making it stand still.

  Further, in the case of the suspended excavation apparatus 1 in which a drive unit provided on the upper part of the excavation apparatus 1 is suspended by a wire 8 hanging from the boom 6 of the base machine 7 and a rod for excavation work is provided on the drive unit, A rotation-side bearing portion 55 is provided at an arbitrary rotation portion such as a drive portion of the excavator 1, a vertical axis 45 provided with the hose support arm 51 of the swivel 2 is mounted on the bearing portion 55, and a tuning mechanism 57 is provided. The swivel excavator 1 may be configured to be stationary by rotating the swivel 2 reversely by the tuning mechanism 57, and the excavator 1 provided with the swivel 2 and the synchronizing mechanism 57 may be rotationally press-fitted in a casing while suspended. It is also possible to adopt a configuration in which the device is inserted into a casing that is rotationally press-fitted.

(Operation of the embodiment)
The present invention has the above-described configuration. When an example of excavation work is shown, an excavating device (not shown) such as a casing rotary press-fitting device 5 and an earth drill is used for a vertical pile having a predetermined diameter and a predetermined depth on the ground W. The excavator 1 is inserted into the vertical hole 23E in a state where the expansion blade 18 is closed and contracted, and the excavator 1 is fixed and held on the casing K by the holding and fixing device 10 at a predetermined position. .
The holding and fixing device 10 which is one of the devices T sends the hydraulic oil from the swivel 2 to the input and output cylinder 13 which is one of the driving sources G and fixes the excavating device 1 to the casing K. In this state, the rotation of the casing K is transmitted to the excavator 1 to drive and rotate, while the expansion blade 18 that is one of the devices T is caused to expand by the expansion and contraction cylinder 19 that is one of the drive sources G. The expansion hole 23 is excavated by expanding outward.

During the rotation of the excavator 1, the expansion blade 18 rotates in the direction intersecting the rotation axis of the excavator 1 at the horizontal axis of the mounting shaft 17 to excavate the slope 23 </ b> A of the expansion hole 23.
At this time, the vertical excavation portion 22 below the wing expansion portion 18A, which is one of the devices T, rotates while maintaining a predetermined angle with respect to the wing expansion portion 18A by the angle adjustment cylinder 25, and the wing expansion portion 18A is rotated. When rotating outward to the maximum inclination state, the vertical excavation part 22 rotates in a substantially vertical state to excavate a cylindrical enlarged cylindrical hole part 23B below the inclined surface 23A of the enlarged hole 23.

In this case, when the vertical excavation part 22 is rotated to the center of the mounting shaft 17, the bottom surface 23 </ b> C of the cylindrical hole becomes an arc surface, but is driven to rotate while rotating the expansion blade 18 upward to the center of the mounting shaft 17. Simultaneously with the excavation, when the expansion blade 18 that is one of the devices T is lowered by the lifting cylinder 28 that is one of the drive sources G in synchronization with the rotation of the expansion blade 18, the vertical excavation section 22 is obtained. Enlarged excavation can be performed so that the movement trajectory along which the lower end moves is in a horizontal state.
For this reason, the vertical hole bottom surface 23F of the vertical hole 23E and the cylindrical hole bottom surface 23C of the enlarged cylindrical hole portion 23B are substantially horizontal, and the bottom surface of the enlarged bulb to be manufactured is leveled to improve the supporting force and pulling resistance of the vertical pile and the enlarged bulb. To stabilize the increase.

  Thus, when the expansion blade 18 excavates the expansion hole 23, the scraper 30 rakes the excavated earth and sand toward the center of the excavator 1, and the collected earth and sand is collected in the earth and sand receiver 31. When the earth and sand are collected in the earth and sand receiver 31, the expansion and contraction cylinder 19 and the elevating cylinder 28 are reduced, and the expansion blade 18 is retracted. In this state, the excavator 1 is once lifted from the vertical hole 23E, The earth and sand are released by opening the open / close lid 32 of the earth and sand receiver 31. When the inside of the earth and sand receiver 31 becomes empty, the excavator 1 is again inserted into the vertical hole 23E and the above operation is repeated.

  Accordingly, the swivel 2 that supplies the hydraulic oil to the drive source G of the various devices T provided in the excavator 1 detects the rotation (rotation speed) and rotation direction of the rotating body 58 on the rotating body 58 side of the swivel 2. Since the rotation control is performed by the gyro sensor 70, when the casing K stops rotating, the swivel 2 also stops rotating. The sensor 70 detects this and activates the tuning mechanism 57 so that the swivel 2 is always located at a predetermined position relative to the excavator 1, and the hose 50 from the fluid supply unit 3 is twisted or entangled. To prevent.

  Since the tuning mechanism 57 is configured so that the rotating body 58 provided on the vertical axis 45 of the swivel 2 is driven and rotated by the tuning motor 60, a control unit (not shown) is used for tuning by a signal from the gyro sensor 70. The motor 60 is energized to rotate the rotator 58, the rotation of the rotator 58 rotates the vertical axis 45 in the opposite direction to the holding and fixing frame 11, and the rotation opposite to the vertical axis 45 rotates the hose support arm 51 of the swivel 2. In addition, the hose 50 is kept stationary with respect to the rotating holding and fixing frame 11 to prevent the hose 50 from being twisted.

  An output gear 61 of a tuning motor 60 is attached to the rotating body 58, and a passive gear 62 is engaged with the output gear 61. Since the passive gear 62 is attached to the holding and fixing frame 11 side, the output gear 61 is driven by the tuning motor 60. When the motor 61 is rotated in the direction opposite to the holding and fixing frame 11, the output gear 61 rotates and revolves around the passive gear 62 on the holding and fixing frame 11 side while rotating. 45 is moved in a stationary state with respect to the holding and fixing frame 11 and is made stationary with respect to the holding and fixing frame 11 (the enlarged blade 18).

  Thus, the swivel 2 has the hose 50 and the hose support arm 51 attached to the vertical axis 45 above the bearing portion 55, the branch cylinder 47 is attached to the vertical axis 45 below the bearing portion 55, and the hose support arm 51 Since the synchronization mechanism 57 is provided between the bearing portions 55, the swivel 2 and the synchronization mechanism 57 can be provided in a compact manner by effectively using the space of the holding and fixing device 10 of the excavator 1.

Further, since the depth detection wire 83 is supported by the hose support arm 51 together with the hose 50 so as to be extended and retracted, the depth detection wire 83 is also prevented from being twisted by the swivel 2, and the depth detection accuracy by the depth detector 82 is improved. Can be improved.
The tuning motor 60 of the tuning mechanism 57 is built in a tuning motor case 65 provided on the rotating body 58, and the output gear 61 is positioned between the tuning motor case 65 and the rotating body 58 in the vertical direction. Therefore, interference between the tuning motor 60, the hose 50, and the hose support arm 51 can be prevented, and twisting of the hose 50 can be prevented.

The rotating body 58 of the synchronization mechanism 57 is formed in a thick case (box) shape by arranging an upper plate 66 and a lower plate 67 at a predetermined interval in the vertical direction, and between the upper plate 66 and the lower plate 67. Since the output gear 61 and the passive gear 62 are arranged, the output gear 61 and the passive gear 62, which are the operating parts of the tuning mechanism 57, are surrounded by the rotating body 58 and are not affected by the earth and sand during excavation, and therefore The tuning mechanism 57 can stably prevent the hose 50 from being twisted.
That is, the hose 50 is positioned below the hose support arm 51, the output gear 61 and the passive gear 62 are surrounded by a case (box) -shaped rotating body 58, and the tuning motor 60 is surrounded by a tuning motor case 65. Therefore, also in this respect, the operating portion of the synchronization mechanism 57 is surrounded and is not affected by the earth and sand during excavation, and the hose 50 can be prevented from being twisted stably.

  DESCRIPTION OF SYMBOLS 1 ... Excavator, 2 ... Swivel, 3 ... Fluid supply unit, 5 ... Casing rotary press-fitting device, 6 ... Boom, 7 ... Base machine, 8 ... Wire, 9 ... Sheave block, 10 ... Holding and fixing device, 11 ... Holding and fixing Frame 12, abutment body 13, entrance / exit cylinder 15, guide guide mechanism 16, vertical movement frame 17, mounting shaft 18, expanding blade 18 A, expanding portion 19, expansion / contraction cylinder 20, mounting Axis, 21 ... Mounting shaft, 22 ... Vertical excavation part, 23 ... Enlarged hole, 23E ... Vertical hole, 25 ... Angle adjustment cylinder, 27 ... Cylinder mounting member, 28 ... Elevating cylinder, 29 ... Mounting member, 30 ... Scraper, 31 ... earth and sand receptacle, 32 ... open / close lid, 33 ... operating lever, 35 ... fixed side cylindrical part, 36 ... outer side cylindrical part, 37 ... inner side cylindrical part, 38 ... bottom plate, 39 ... moving side cylindrical part, 40 ... engaging concave part, 41 ... engaging convex part DESCRIPTION OF SYMBOLS 42 ... Support member, 43 ... Mounting part, 45 ... Vertical axis, 46 ... Connection nozzle, 47 ... Branch pipe, 48 ... Channel, 49 ... Rotation side piping, 50 ... Hose, 51 ... Hose support arm, 55 ... Bearing part , 57 ... tuning mechanism, 58 ... rotating body, 60 ... tuning motor, 61 ... output gear, 62 ... passive gear, 65 ... case for tuning motor, 66 ... upper plate, 67 ... lower plate, 68 ... lower cylinder 70: Gyro sensor, 75 ... Upper cylinder, 76 ... Top plate, 77 ... Cylinder case, 80 ... Control panel, 81 ... Hose reel, 82 ... Depth detector, 83 ... Depth detection wire.

Claims (6)

  In the swivel 2 that supplies fluid by a hose 50 to the drive source G of the equipment T for excavating the ground of the excavator 1 suspended by the wire 8, the swivel 2 is an upper part of the part of the equipment T that the excavator 1 rotates. In addition, a vertical axis 45 having a flow path 48 inside is attached via a tuning mechanism 57 having a tuning motor 60 that rotates in synchronization with the rotating device T in reverse, and the tuning motor 60 is driven by a gyro sensor 70. The excavator is configured such that the swivel 2 is stationary with respect to the device T.   In claim 1, the tuning mechanism 57 is configured to rotate a rotating body 58 provided on the vertical axis 45 by a tuning motor 60, and the rotating body 58 includes a tuning motor 60 and a tuning motor 60. An output gear 61 is provided, a passive gear 62 meshing with the output gear 61 is provided on the equipment T side, the vertical axis 45 is mounted on a bearing portion 55 provided in the excavator 1, and the tuning motor 60 and the output gear 61 are provided. Is configured to revolve around the passive gear 62, and the swivel 2 has a hose 50 and a hose support arm 51 attached to a vertical axis 45 above the bearing portion 55, and a portion below the bearing portion 55. A branch cylinder 47 is attached to the vertical axis 45, and a tuning mechanism 57 is provided between the hose support arm 51 and the bearing portion 55. The rotating body 58 of the tuning mechanism 57 moves the upper plate 66 and the lower plate 67 up and down. At a predetermined interval The output gear 61 and the passive gear 62 are disposed between the upper plate 66 and the lower plate 67, and the tuning motor 60 of the tuning mechanism 57 is a rotating body. 58. The tuning motor case 65 is mounted on the lower surface side of the lower plate 67, and the excavator 1 is a casing K press-fitted into the ground by the casing rotary press-fitting device 5. The excavator 1 is inserted into the casing K and integrally rotated together with the casing K. The excavator 1 includes at least the holding and fixing device 10 that fixes the excavator 1 to the casing K and rotates the excavator 1 to constitute the device T, and The holding and fixing device 10 has an enlarged wing 18 that constitutes the device T and is rotatably attached to the holding and fixing frame 11 side by the attachment shaft 17. Morphism respectively the scaling cylinder 19 for scaling the and out the cylinder 13 and before the enlargement blade 18 to enter and exit in a direction as a drive source G, configuration and excavating apparatus for supplying fluid through the swivel 2 to the drive source G.   In claim 1, the tuning mechanism 57 is configured to rotate a rotating body 58 provided on the vertical axis 45 by a tuning motor 60, and the rotating body 58 includes a tuning motor 60 and a tuning motor 60. An output gear 61 is provided, a passive gear 62 meshing with the output gear 61 is provided on the equipment T side, the vertical axis 45 is mounted on a bearing portion 55 provided in the excavator 1, and the tuning motor 60 and the output gear 61 are provided. Is an excavator configured to revolve around the passive gear 62.   4. The swivel 2 according to claim 3, wherein the hose 50 and the hose support arm 51 are attached to the vertical axis 45 above the bearing portion 55, the branch cylinder 47 is attached to the vertical axis 45 below the bearing portion 55, and the hose. An excavator having a configuration in which a synchronization mechanism 57 is provided between the support arm 51 and the bearing portion 55.   5. The rotating body 58 of the tuning mechanism 57 according to claim 4, wherein the upper plate 66 and the lower plate 67 are formed in a thick case shape by disposing the upper plate 66 and the lower plate 67 at predetermined intervals in the vertical direction. The output gear 61 and the passive gear 62 are arranged between them, and the tuning motor 60 is built in a tuning motor case 65 provided on the rotating body 58, and the tuning motor case 65 is placed in the lower part. Excavator attached to the lower surface side of the plate 67.   The excavator 1 according to any one of claims 1 to 5, wherein the excavator 1 is inserted into a casing K press-fitted into the ground by a casing rotary press-fitting device 5 and rotates integrally with the casing K. 1. At least, the excavator 1 is fixed to the casing K and integrally rotated, and the holding and fixing device 10 constituting the device T is rotated by the mounting shaft 17 on the holding and fixing frame 11 side of the holding and fixing device 10. The expansion / contraction cylinder 19 which has the expansion blade 18 which comprises the said apparatus T attached freely, and makes the contact body 12 of the said holding | maintenance fixing apparatus 10 go in / out in the radial direction, and the expansion / contraction cylinder 19 which expands / contracts the front expansion blade 18 is included. The excavator is configured to supply a fluid to the drive source G by the swivel 2.

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