JP7281068B2 - Drilling device - Google Patents

Description

The present invention relates to a drilling device capable of drilling curved elongated holes, and is particularly effective in forming elongated holes for installing U-shaped reinforcing members in existing concrete structures. It relates to a drilling device.

Conventionally, as a technique for reinforcing reinforced concrete columns, for example, a long hole is drilled from one side of the concrete column, a shear reinforcing material is driven into the long hole, and the remaining space is filled with a fluid curable resin or inorganic mortar and solidified. is known (for example, Patent Document 1).
In the above reinforcement method, a plurality of straight long holes are drilled in parallel or crossing from one side of the column to the vicinity of the main reinforcement row embedded along the opposite side, and a shear reinforcing material is inserted in each long hole. It is to insert, fill the surroundings, and solidify, and the multiple reinforcing materials are not connected to each other and are scattered. Therefore, the restraining force of the reinforcing material on the core concrete was not sufficient.

Japanese Patent Application Laid-Open No. 2000-110365 JP-A-2004-84363 JP-A-2006-28751

By the way, if it is possible to form a U-shaped elongated hole for inserting a reinforcing material into an existing concrete structure and insert a continuous reinforcing material into the elongated hole, the force that restrains the concrete by the reinforcing material can be increased. Therefore, the seismic strength can be further enhanced.
However, it is technically difficult to drill a U-shaped long hole from one side of a concrete column, and such a technique has not been put into practical use.

As an invention relating to a curved drilling device for forming curved holes, there is provided a double pipe consisting of an outer pipe formed with the same curvature as that of the curved hole and an inner pipe with a water jet attached to the front end. There is a proposal to drill a curved hole by inserting a double pipe into the ground while excavating the ground by spraying high-pressure water from a water jet placed at the front end of the outer pipe. (See Patent Documents 2 and 3, for example).
However, the curved drilling devices described in Patent Documents 2 and 3 are all devices for forming curved holes in the ground, and form curved holes in structures with high hardness such as concrete columns. you can't.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems described above, and an object of the present invention is to provide a drilling device capable of forming a curved hole in a concrete structure.
Another object of the present invention is to provide a compact drilling device capable of forming a U-shaped hole for inserting a seismic reinforcement material into an existing concrete column and having good workability.

In order to achieve the above object, the present invention
drilling means for drilling a hole in a wall of a concrete structure by jetting high-pressure water from the nozzle having a nozzle for jetting high-pressure water; and mounting the drilling means on the wall of the concrete structure. and a connecting means for connecting the drilling means and the mounting means,
The drilling means is
a high pressure lance having the nozzle at its tip;
a rotation driving means for rotating the high pressure lance around its own axis;
a moving means for axially moving the high pressure lance,
The mounting means is
a base member having a circular opening through which the high-pressure lance can be inserted and joined to the wall surface of the concrete structure;
and revolution drive means for rotating the drilling means around an axis parallel to the rotation axis of the high pressure lance and at a different position.

According to the drilling apparatus having the above configuration, the high-pressure lance having the nozzle at the tip can be oscillated around the rotation axis and the revolution axis, so drilling can be performed with a high degree of freedom. . Further, a curved hole can be formed by switching the nozzle for ejecting high-pressure water and drilling holes having different angles with respect to the axis of the high-pressure lance. Furthermore, by changing the amplitude of revolution while maintaining the same amplitude of rotation, it is possible to drill holes with almost the same cross section (rectangular shape). The control of the drive means (motor) in is simplified. Further, by setting the rocking angle, the number of times of rocking, and the drilling time in detail by a program or the like, drilling accuracy can be enhanced, and the finished state can be improved.

Here, desirably, the attachment means
a support member provided on the front side of the base member;
a rotating member rotatably mounted on the bearing member;
a guide pipe arranged to pass through the support member and the base member;
a first coupling means for coupling the rotating member and the guide pipe;
a second coupling means for coupling the guide pipe and the drilling means;
The high-pressure lance is arranged so as to penetrate the guide pipe while the drilling means is connected to the mounting means,
The revolution driving means configures the rotating member to be reciprocally rockable.

According to the above configuration, the high-pressure lance can be oscillated around the rotation axis and the revolution axis, and the drilling means (drilling unit) can be easily attached to the mounting means (revolution drive unit). It is possible to realize a small drilling device that can be attached to and detached from the machine and has good operability. Further, as a result, when drilling two or more locations on the wall surface of a concrete structure, a plurality of drilling devices can be attached to the wall surface of the structure to be drilled, and workability is improved. can be improved. Furthermore, when switching nozzles, by moving the high-pressure lance along the inner wall of the guide pipe, it is possible to stably attach and detach the drilling means (drilling unit), improving the reproducibility of the mounting state. can.

Also, preferably, an opening is formed in the peripheral wall of the guide pipe, and an end of a hose for suction is connected to the opening forming portion of the guide pipe.
As a result, the guide pipe can be used as a member for inserting the high-pressure lance and as a member for discharging chippings generated by drilling to the outside, so that the apparatus can be made compact.

Further, desirably, the tip of the high-pressure lance has a nozzle for ejecting high-pressure water in a direction perpendicular to the axis of the high-pressure lance and a nozzle for ejecting high-pressure water in a direction oblique to the axis of the high-pressure lance. , is provided.
As a result, there is no need to replace the nozzle when the direction of drilling is changed by ejecting high-pressure water, and work efficiency can be improved.

Further, desirably, the drilling means includes a frame integrated with the second coupling means, a guide rail provided on the frame, and a holder mounted on the rotation driving means and holding the rear end side of the high pressure lance. and
The rotation driving means and the holder are installed movably along the guide rail in the axial direction of the high pressure lance, and a position-adjustable connection means is provided between the moving means and the rotation driving means. configured as
According to this configuration, when the direction of drilling is changed, the fixed position of the rotation driving means and the axial direction of the holder lance with respect to the frame is changed, so that the nozzle can be easily set at the optimum position according to the direction of drilling. can. Further, even if the moving range of the moving means for moving the high pressure lance in the axial direction is relatively narrow, by changing the fixing position, holes can be drilled at different positions without changing the moving range.

According to the drilling device of the present invention, curved holes can be drilled in concrete structures. In addition, there is an effect that it is possible to realize a compact drilling device capable of drilling a U-shaped hole having a large curvature for inserting a material for seismic reinforcement into a concrete column and having good workability.

1 is a plan view showing an embodiment of a drilling unit that constitutes a drilling apparatus according to the present invention; FIG. FIG. 4 is a side view showing the configuration of the drilling unit of the embodiment; It is a front view which shows the structure of the drilling unit of embodiment. 1 shows the configuration of a revolution drive unit that constitutes the drilling apparatus of the embodiment, where (A) is a front view and (B) is a side view thereof. (A) to (C) are front views showing states in which the revolution drive unit according to the embodiment is in revolution motion. It is a side view which shows the state which mounted|wore the revolution drive unit of embodiment with the drilling unit. 1A and 1B are an enlarged plan view and an enlarged side view of a head portion, respectively, showing a configuration example of a head portion at the tip of a high-pressure lance that constitutes a drilling unit of an embodiment; FIG. The state of the head portion at the tip of the high-pressure lance during oscillation is shown. (A) is a front view of the head portion during oscillation due to rotation, and (B) is a front view of the head portion during oscillation due to revolution. be. (A) to (E) are explanatory diagrams showing how a long hole is formed by combining rotation and revolution of a high-pressure lance. It is a cross-sectional view showing an example of the structure of a concrete column into which a U-shaped steel material for seismic reinforcement is inserted. (A) and (B) are cross-sectional plan views showing a first step of drilling a U-shaped long hole in a concrete column. (A) and (B) are cross-sectional plan views showing a second step of drilling a U-shaped long hole in a concrete column. (A) and (B) are cross-sectional plan views showing a third step of drilling a U-shaped long hole in a concrete column.

Hereinafter, an embodiment of a water jet drilling apparatus capable of drilling curved holes in a concrete structure according to the present invention will be described in detail with reference to the drawings.
1 to 4 show an embodiment of a drilling apparatus according to the present invention. Among them, FIG. 1 is a plan view of a drilling unit constituting the drilling apparatus, and FIG. 2 is a side view of the drilling unit. 3 is a front view of a drilling unit, and FIGS. 4(A) and 4(B) are a front view and a side view of a revolution driving unit constituting the drilling apparatus.
The drilling apparatus of this embodiment comprises a drilling unit 10 having a head portion 11 having a nozzle for ejecting a water jet, and a drilling unit 10 configured as shown in FIGS. A revolution drive unit 20 configured as shown in FIG.

1 and 2, the drilling unit 10 comprises a high pressure lance 12 having a head portion 11 at its tip, a holder 13 holding the high pressure lance 12, a guide rail 14A, a slider 14B and an air guide. and a slide unit 14 having a cylinder 14C and capable of moving the holder 13 in the front-rear direction (left-right direction in the figure). As shown in FIG. 3, the guide rails 14A are provided as 14A1 and 14A2 below the holder 13 and below the air cylinder 14C, respectively.
The amount of movement of the drilling unit 10 by the slide unit 14 is not particularly limited, but is set to a size (for example, several tens of millimeters) necessary for forming one hole. By reducing the amount of movement, the size of the air cylinder 14C can be reduced.

Further, the drilling unit 10 includes a frame 15 supporting the slide unit 14, a revolution guide pipe 16 for guiding the high pressure lance 12 and connecting the drilling unit 10 to the revolution drive unit 20, A clamp means 17A consisting of a pair of single clamps for holding the guide pipe 16 for revolution and a bracket 17B for fixing the clamp means 17A to the front end portion of the frame 15 are provided for connecting the guide pipe 16 for revolution to the frame 15. and connecting means 17 .

As shown in FIG. 3, each single clamp constituting the clamping means 17A has a C-shaped clamp body 71 and one end of the clamp body 71 that rotates through a pin shaft 72. a movable piece 73 mounted removably; a bolt 75 rotatably mounted on the other end of the clamp body 71 via a pin shaft 74 and penetrating the tip of the movable piece 73; By rotating and tightening the tightening nut 76 , the guide pipe 16 for revolution is gripped between the clamp body 71 and the movable piece 73 .

Further, the drilling unit 10 includes connecting means 18 for fixing the air cylinder 14C to a predetermined position on the frame 15 by means of an L-shaped plate 18A and bolts 18B, and a high pressure lance 12 held by the holder 13. and a slide unit drive 19 with an air motor 19A and a swivel joint 19B for driving. By setting the mounting position of the bolt 18B to one of P1, P2, and P3 in FIG. 2, the movement range in the axial direction of the high-pressure lance 12 is switched, and the position for drilling a hole by spraying a water jet can be changed. can change.
12(B), P2 is the drilling position of the auxiliary hole 35A shown in FIG. 12(A), and P3 is the horizontal hole shown in FIG. 13(A). They respectively correspond to the drilling positions of 37A.

The slide unit driving portion 19 is provided with an air hose joint 19C for connecting an air hose for supplying compressed air to the air motor 19A. At the rear end of the holder 13, a hose coupling portion 13a is provided to which a high pressure hose 41 for supplying high pressure water to the high pressure lance 12 is coupled.
Furthermore, an opening is formed in the peripheral wall of the guide pipe 16 for revolution at a position near the connecting means 17, and the high-pressure lance 12 is used to remove chipping water and chipping debris generated by drilling holes in the concrete column with high-pressure water. and the end of a vacuum hose 42 for sucking out to the outside through a gap between and the guide pipe 16 for revolution is connected.

As shown in FIG. 2 , the high-pressure lance 12 is inserted into the revolution guide pipe 16 so as to be positioned below the center of the revolution guide pipe 16 . This is because the head portion 11 at the tip of the high-pressure lance 12 is provided with the nozzle 11a protruding outside the peripheral surface of the high-pressure lance 12 .
As described above, by eccentrically moving the center of the high pressure lance 12 from the center of the revolution guide pipe 16, the high pressure lance can 12 can be inserted into or pulled out from the guide pipe 16 for revolution. The revolution drive unit 20 functions as mounting means for mounting the drilling unit 10 on the wall surface of the concrete structure via the guide pipe 16 for revolution.

As shown in FIG. 4, the revolution drive unit 20 includes a circular base plate 22 that is fixed in a state of being joined to the wall surface by three anchor bolts 21A and nuts 21B that are driven into the wall surface W of a concrete pillar or the like; A sleeve 23 provided at a position slightly above the center of the base plate 22 and a shaft portion fitted inside the sleeve 23 are provided so as to be rotatable around the center of the sleeve 23. It has a rectangular rotating member 24 and a clamp means 25 fixed to the front surface of the end of the rotating member 24 on the rotation center side.
A circular opening corresponding to the inner periphery of the sleeve 23 is formed in the base plate 22 , and the guide pipe 16 for revolution is inserted through the openings of the sleeve 23 and the base plate 22 . In addition, in FIG. 4(B), what is denoted by H is a long hole drilled linearly from the wall surface W of the concrete pillar toward the inner part. The long hole H can be drilled in advance using a tool such as a diamond core drill.

The revolution driving unit 20 includes a revolution driving motor 26 attached to the front face of the end opposite to the center of rotation of the rotating member 24 for causing the drilling unit 10 to revolve, and a rotating shaft of the motor 26. and an arc-shaped internal gear 27B fixed to the lower portion of the base plate 22 and meshing with the revolution gear 27A.
The base plate 22 and the rotating member 24 are formed with an opening into which the guide pipe 16 for revolution can be inserted at a portion corresponding to the sleeve 23 . The clamping means 25 is provided with a handle 25A. With the handle 25A loosened, the distal end of the guide pipe 16 for revolution is inserted into the openings of the base plate 22 and the rotating member 24, and then the handle 25A is rotated. It is configured such that the revolution guide pipe 16 can be integrally coupled with the rotating member 24 by tightening.

Further, a pair of stopper pins 28A and 28B are provided on the front surface of the base plate 22 for restricting the rotation range of the rotating member 24, and the lower end of the rotating member 24 is provided with an origin position and a A limit sensor 29 is provided for detecting the rotation range limit position.
FIG. 5 shows a state in which the revolving drive unit 20 revolves. 5B shows the state where the rotating member 24 is at the origin position, FIG. 5A shows the state where the rotating member 24 is rotated leftward from the origin position, and FIG. A state in which the rotating member 24 is rotated rightward from the origin position is shown.

FIG. 6 shows a state in which the drilling unit 10 shown in FIG. 1 is attached to the revolution drive unit 20 shown in FIG.
In the revolution drive unit 20 of this embodiment, when the revolution drive motor 26 is operated, the revolution gear 27A rotates and moves leftward or rightward along the internal gear 27B, thereby causing the rotating member 24 to oscillate. be moved. Therefore, the guide pipe 16 for revolution and the drilling unit 10 coupled to the rotating member 24 by the clamp means 25 are swung together.
Since the high-pressure lance 12 is inserted at a position eccentric from the center of the guide pipe 16 for revolution, the high-pressure lance 12 and the head portion 11 at the tip thereof revolve around the center axis of the guide pipe 16 for revolution. It will happen.
On the other hand, in the drilling unit 10, when the air motor 19A is operated, the high pressure lance 12 rotates around its own axis, and the direction of the nozzle of the head portion 11 can be changed.

As described above, the high-pressure lance 12 inserted into the long hole H is configured to revolve while rotating. This is because it cannot be guaranteed. The diameter of the long hole H is set to be slightly larger than the diameter of the tip of the head portion 11, and the high-pressure lance 12 of the nozzle is inserted at a position eccentric from the center of the guide pipe 16 for revolution. Therefore, if the high-pressure lance 12 is rotated by a predetermined angle or more, the tip of the nozzle hits the wall surface of the long hole H, but by combining the revolution, the direction of the nozzle can be changed to a larger angle. Furthermore, by combining the rotation and revolution of the high-pressure lance 12, the angle and reaching distance of the water jet ejected from the nozzle can be controlled to easily punch a hole of a desired size.

FIG. 7 shows the configuration of the nozzle of the head section 11 provided at the tip of the high pressure lance 12. As shown in FIG. Among them, (A) is an enlarged plan view showing the head portion 11 , and (B) is a side view of the head portion 11 . As shown in FIGS. 7A and 7B, two nozzles 11a and 11b are provided in the head portion 11 at the tip of the high pressure lance 12 of this embodiment. Among them, the nozzle 11a on the tip side ejects a water jet in a direction perpendicular to the axis, and the nozzle 11b provided in a part away from the tip ejects a water jet in a direction of about 45 degrees to the axis. Nozzle.

Although the high-pressure lance 12 can supply high-pressure water to both nozzles 11a and 11b, the nozzle 11b must be blind-plugged when using the nozzle 11a, and the nozzle 11a must be blind-plugged when the nozzle 11b is used. , it is possible to advance drilling by ejecting water jets only in a desired direction. Moreover, it is also possible to simultaneously eject water jets from both nozzles 11a and 11b, and by simultaneously ejecting from both nozzles, chipping can be reduced.

FIG. 8 shows a front view of the head portion 11 provided at the tip of the high pressure lance 12. As shown in FIG. Among them, (A) is a view showing the state of ejection of the water jet WJ when the high pressure lance 12 is rotated, and (B) is a view showing the state of ejection of the water jet WJ when the high pressure lance 12 is rotated and revolved. FIG. 4 is a diagram showing; As shown in FIG. 8, a hole of a desired size can be formed by moving the high-pressure lance 12 in the axial direction while controlling the angle of the nozzle 11a or 11b, that is, the ejection angle of the water jet.

8A and 8B, the point marked with O1 is the center of rotation of the high pressure lance 12, the point marked with O2 is the center of revolution of the high pressure lance 12, and the point marked with H is the center of rotation of the high pressure lance 12. It is a hole drilled in the wall surface of the concrete column.
Referring to FIG. 8A, it can be seen that the tip of the nozzle 11a (upper end side in the drawing) hits the wall surface of the hole H at a predetermined angle or more when the high pressure lance 12 is rotated around the point O1. On the other hand, when the high-pressure lance 12 is revolved around the point O2, it can be seen that the lower end of the nozzle 11a hits the wall surface of the hole H at a predetermined angle or more.
Therefore, by combining the rotation and revolution of the high pressure lance 12 as described above, the angle of the water jet ejected from the nozzle is increased compared to the case of only rotation or only the revolution, and the wire for shear reinforcement is increased. insertion diameter (entrance) can be secured.

FIG. 9 shows how the high-pressure lance 12 digs into the hole H by controlling the ejection angle of the water jet by combining the rotation and revolution of the high-pressure lance 12 . As shown in FIG. 9, when drilling the entrance portion of the hole H, the amplitude of revolution is increased, and as the hole H becomes deeper, the amplitude of revolution is decreased. A hole H of cross-section (rectangular cross-section) can be drilled.
In addition, by changing the amplitude of revolution while maintaining the same amplitude of rotation, it is possible to drill holes H with substantially the same cross section, which has the advantage of simplifying the control of the motor. In addition, in order to dig through the hole H with the same cross section, it is necessary to control the time (the number of reciprocations) in addition to controlling the amplitude of revolution. Such control can be performed by setting a program that controls the motor. It is also possible to form a hole H with a circular cross section by changing the amplitude of revolution according to the position in the axial direction.

Next, an example of a specific drilling operation procedure using the drilling apparatus of the above-described embodiment is performed by embedding a U-shaped shear reinforcing material as shown in FIG. A concrete explanation will be given by taking a factory as an example.
The concrete pillars 30 shown in FIG. 10 are constructed by inserting a shear reinforcing material into the existing reinforced concrete pillars to increase the seismic strength, and the existing reinforced concrete pillars are arranged at predetermined intervals. A plurality of vertical main reinforcing bars 31 are embedded in advance.

In addition, the concrete column 30 of FIG. 10 with increased seismic strength is provided with a U-shaped shear reinforcing member 32 extending from one surface of the column to the vicinity of the main reinforcing bar 31 located near the opposite surface. Locking portions 33A and 33B for locking the ends are fixed to both ends of the shear reinforcing member 32. As shown in FIG. In addition, the clearance between the shear reinforcing member 32 and the hole around it is filled with a fluid hardening material and solidified. For the shear reinforcing member 32, it is preferable to use a wire rope made by twisting steel wires, for example, so that it can be easily inserted into the U-shaped hole formed in the concrete column 30. As shown in FIG.
The shear reinforcing member 32 is arranged under tension by, for example, fixing the engaging portion 33A to one end and then fixing the engaging portion 33B while pulling the other end. It's okay to be there. Alternatively, a wedge may be driven between the engaging portions 33A, 33B and the surface of the column to apply tension to the shear reinforcing member 32. FIG.

Next, a method of drilling a long hole for inserting the U-shaped shear reinforcing member 32 into an existing concrete column using the water jet drilling apparatus of the above embodiment will be described with reference to FIGS. will be described with reference to a cross-sectional plan view of FIG.
In forming the elongated holes for inserting the shear reinforcing member 32, straight vertical holes 34A and 34B as shown in FIG. Drill to depth. The vertical holes 34A and 34B may be drilled using a high-pressure lance having a nozzle capable of ejecting high-pressure water forward.

Next, as shown in FIG. 11(B), the revolution drive unit 20 of the drilling apparatus of the above embodiment is attached so as to cover the entrance of the vertical hole 34A (or 34B).
After that, the drilling unit 10 is connected to the revolution drive unit 20 by inserting the high pressure lance 12 having a nozzle at its tip into the vertical hole 34A. Then, as shown in FIG. 12(A), high-pressure water is jetted from a nozzle 11a capable of jetting high-pressure water in the horizontal direction, and a relatively shallow auxiliary hole 35A is formed at a position slightly before the inner part of the vertical hole 34A. drill holes. Subsequently, as shown in FIG. 12(B), high-pressure water is jetted from a nozzle 11b capable of jetting high-pressure water in an oblique direction at the tip of the high-pressure lance 12 inserted into the vertical hole 34A, and the inner portion of the vertical hole 34A is The oblique hole 36A is drilled to a predetermined depth from a portion slightly before the auxiliary hole 35A.

Next, as shown in FIG. 13(A), high-pressure water is jetted from a nozzle 11a capable of jetting high-pressure water in the horizontal direction at the tip of the high-pressure lance 12 inserted into the vertical hole 34A, and the inner portion of the vertical hole 34A is From there, a horizontal hole 37A extending to the other vertical hole 34B is drilled to the vicinity of the center.
Subsequently, as shown in FIG. 13B, the high pressure lance 12 is inserted into the other vertical hole 34B, and the auxiliary hole 35B, oblique hole 36B and horizontal hole 37B are drilled in the same procedure as above. pass through. This creates a cavity with a generally U-shaped passageway. When passing through the horizontal hole 37B, by inserting the suction pipe deep into the vertical hole 34B on the outlet side and sucking the chippings, the suction pipe acts as a guard member to remove the chips from the part other than the part to be drilled. Excessive drilling of holes can be prevented. Alternatively, two drilling devices may be prepared and attached to the wall surface of the concrete column so that drilling from the vertical hole 34A side and drilling from the vertical hole 34B side proceed simultaneously.

After that, one end of a relatively thin-diameter guiding wire or string is connected to the tip of the inserted shear reinforcement, and the other end of this guiding wire or string is inserted into the entrance of the vertical hole 34A (or 34B). Then, the vertical hole 34A-slanted hole 36A-horizontal hole 37A-horizontal hole 37B-slanted hole 36B-vertical hole 34B are inserted. Then, the end of the leading wire or string protruding from the entrance of the vertical hole 34B (or 34B) is pinched, and the shear reinforcing material connected to the other end is pulled and inserted into the U-shaped hole. .

Next, a fluid curable resin is injected from the entrance of the vertical hole 34A (or 34B) to fill the gaps and voids between the shear reinforcing member and the hole. Subsequently, the anchoring portions 33A and 33B are fixed to both ends of the shear reinforcing member 32 so as to apply tension to the shear reinforcing member, and the operation of disposing one shear reinforcing member is completed. If multiple shear reinforcements 32 are required, the above steps are repeated at different heights. Although the auxiliary holes 35A and 35B may be omitted, providing these holes has the advantage of making it easier to insert the shear reinforcing material.

Although the invention made by the inventor has been specifically described based on the embodiment, the invention is not limited to the embodiment. For example, in the above-described embodiment, a high-pressure lance 12 provided with a nozzle 11a capable of ejecting high-pressure water in a horizontal direction and a nozzle 11b capable of ejecting high-pressure water in an oblique direction is used in the head portion 11 of the drilling device. However, a high-pressure lance equipped with a nozzle capable of ejecting high-pressure water in the horizontal direction and a high-pressure lance equipped with a nozzle capable of ejecting high-pressure water in an oblique direction are separately prepared and used by exchanging them. Also good.

Further, in the above-described embodiment, the case where the drilling apparatus of the present invention is used for drilling a U-shaped long hole in order to embed a shear reinforcing material in a reinforced concrete column has been described as an example. The drilling apparatus of the present invention can also be used to drill curved or curved holes in concrete structures other than reinforced concrete columns.

10 drilling unit (drilling means)
11 head part 11a, 11b nozzle 12 high pressure lance 13 holder 14 slide unit 14C air cylinder 15 frame 16 guide pipe for revolution 17, 18 connecting means 19 slide unit drive part 19A air motor (rotation drive means)
20 revolution drive unit (mounting means)
22 base plate (base member)
23 sleeve (bearing member)
24 rotation member 25 clamp means 26 revolution drive motor (revolution drive means)
30 Concrete column 32 Shear reinforcement 34-37 Hole 42 Vacuum hose

Claims (5)

drilling means for drilling a hole in a wall of a concrete structure by jetting high-pressure water from the nozzle having a nozzle for jetting high-pressure water; and mounting the drilling means on the wall of the concrete structure. and a connecting means for connecting the drilling means and the mounting means,
The drilling means is
a high pressure lance having the nozzle at its tip;
a rotation driving means for rotating the high pressure lance around its own axis;
a moving means for axially moving the high pressure lance,
The mounting means is
a base member having a circular opening through which the high-pressure lance can be inserted and joined to the wall surface of the concrete structure;
and revolution drive means for rotating the drilling means around an axis that is parallel to the rotation axis of the high pressure lance and located at a different position. The mounting means is
a support member provided on the front side of the base member;
a rotating member rotatably mounted on the bearing member;
a guide pipe arranged to pass through the support member and the base member;
a first coupling means for coupling the rotating member and the guide pipe;
a second coupling means for coupling the guide pipe and the drilling means;
The high-pressure lance is arranged so as to penetrate the guide pipe while the drilling means is connected to the mounting means,
2. The drilling apparatus according to claim 1, wherein said revolution drive means is configured to allow said rotating member to reciprocate. 3. The drilling apparatus according to claim 2, wherein an opening is formed in the peripheral wall of the guide pipe, and an end of a hose for suction is connected to the opening forming portion of the guide pipe. The tip of the high-pressure lance is provided with a nozzle for ejecting high-pressure water in a direction orthogonal to the axis of the high-pressure lance, and a nozzle for ejecting high-pressure water in a direction oblique to the axis of the high-pressure lance. 4. The drilling device according to claim 2 or 3, characterized in that there is a The drilling means comprises a frame integrated with the second coupling means, a guide rail provided on the frame, and a holder mounted on the rotation driving means and holding the rear end side of the high pressure lance,
The rotation driving means and the holder are installed so as to be movable in the axial direction of the high pressure lance along the guide rail, and a position-adjustable connecting means is provided between the moving means and the rotation driving means. The drilling device according to any one of claims 2 to 4, characterized in that the drilling device is

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