JP2013083041A - Drilling method, shear reinforcement method and drilling device of reinforced concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform drilling by a drill which performs drilling using both of rotation and striking to a reinforced concrete structure even in a narrow space while eliminating the need of a large-scale jig, machine or temporary equipment.SOLUTION: By a drill 4 which is assembled movably along a stand 5 fixed to a reinforced concrete structure 1 and performs drilling using both of rotation and striking, drilling is performed to the reinforced concrete structure 1. To put it concretely, after the drill 4 which performs drilling using both of rotation and striking is moved back along the stand 5 and integrally rotated at a distal end of the stand 5, a drilling rod is pulled out from a borehole, then a long drilling rod longer than the stand 5 is inserted to the borehole, the long drilling rod is mounted on the drill 4 which performs drilling using both of rotation and striking, and the borehole is drilled deeper than the length of the stand 5 by the long drilling rod mounted on the drill 4 which performs drilling using both of rotation and striking.

Description

  The present invention relates to a drilling method for a reinforced concrete structure, a shear reinforcement method, and a drilling device used for the shear reinforcement method.

  The seismic reinforcement method for existing concrete structures includes a method in which a reinforcing member is inserted after drilling a structure and a filler is injected into the insertion hole, or a filler is injected into the reinforcing member insertion hole. Is inserted (see, for example, Patent Documents 1 and 2).

Patent Document 1 proposes a shear reinforcement structure for a reinforced concrete structure that can be applied even where a semicircular hook cannot be applied, has few restrictions on the object of application, and can be easily constructed. .
The shear reinforcement structure of a reinforced concrete structure of Patent Document 1 includes a reinforcement member insertion hole drilled from one side of the reinforced concrete structure toward the other side, a shear reinforcement member inserted into the reinforcement member insertion hole, and a reinforcement member And a filler for filling the insertion hole. The reinforcing member insertion hole is drilled to the near side of the reinforcing bar attached to the main reinforcing bar located on the other side of the reinforced concrete structure, and has a uniform inner diameter from the entrance side to the back side. The distal end portion of the shear reinforcement member is inserted to the near side of the power distribution bar attached to the main reinforcing bar on the back side. The filler is injected into the reinforcement member insertion hole either before or after the shear reinforcement member is inserted into the reinforcement member insertion hole.

Furthermore, Patent Document 2 has necessary and sufficient fixing performance despite a small hole diameter, and in particular, reduces material costs and processing costs, and minimizes locations where there is no adhesive force. A shear reinforcement structure for reinforced concrete structures is proposed.
The shear reinforcement member used for the shear reinforcement structure of a reinforced concrete structure in Patent Document 2 is composed of a reinforcing bar and a fixing body having a plurality of irregularities formed at the end of the reinforcing bar by rolling, and the main reinforcing bar on the back side It is inserted to the near side of the power distribution muscle attached to.

  In the above-mentioned seismic reinforcement method, the drilling is conventionally performed using a core drill, and the inner surface of the drilling hole is roughened after drilling with the core drill.

Patent Document 3 proposes a drill stand that is fixed so as not to move so that the drill bit does not escape even when torque is applied during drilling work such as seismic reinforcement work.
The drill stand of Patent Document 3 is used by connecting a drill bit for drilling concrete, and a connecting plate is attached to the top end of an elevating bar supported by a support base with casters so as to be rotatable in a vertical plane. The surface to be drilled is attached to the ceiling or wall surface, which is the surface to be drilled, via a base board, and the base board is attached with a drilling bit supported by a column, a drive motor, a moving air cylinder, etc. Is provided so that the stand can be fixed so that it does not move by being previously inserted into the self-drilling hole of the drill.

Japanese Patent No. 4395191 JP 2011-140796 A JP 2000-79508 A

By the way, in the seismic strengthening method, the drilling can be performed by using a core drill or a leg drill accompanied by striking.
However, drilling with leg drills is accompanied by impact, requiring special and large drilling jigs and machines, temporary construction compared to core drills, widening the required work space, Along with these problems, there are problems such as an increase in work hazards.
Further, the drill stand of Patent Document 3 is for a core drill, and is a support base with casters, a lifting bar supported by a support base with casters, and a connection that is pivotally attached to the top end of the lifting bar within a vertical plane. It is a structure provided with a board etc., and cannot respond to the drilling by a leg drill accompanied by striking.

In core boring, a core rod can be added, but in a rotation + striking type drill such as a leg drill, the extension cannot be extended by adding a rod.
In addition, a stand is indispensable because it is difficult to hold a machine for deep drilling in the horizontal direction, but in the past, the equipment was large.
Also, if the drilling hole is in the vertical direction, a rod corresponding to the drilling hole height is used, so that the position of the machine becomes high and a stand having a height corresponding to that is required.
However, a tall stand has a high center of gravity, is prone to falling, and a machine fall accident may occur.

  An object of the present invention is to enable drilling by a drill for drilling by using both rotation and hammering for a reinforced concrete structure even in a narrow space while eliminating the need for large jigs, machines, and temporary construction.

In order to solve the above problems, the invention described in claim 1
Drilling while drilling forward with respect to the reinforced concrete structure by a drill for drilling by using a combination of rotation and striking movably assembled along a stand fixed to the reinforced concrete structure. .

The invention described in claim 2
A method for drilling holes in a reinforced concrete structure according to claim 1,
After drilling the reinforced concrete structure with a drill that drills using both rotation and hammering,
Retracting the drill that drills using the rotation and striking together along the stand, and extracting the drilling rod from the drilling hole,
Insert a long drilling rod into the drilling hole,
Attach the long drilling rod to a drill that drills using both rotation and blow,
The drilling hole is deeply drilled by the long drilling rod attached to a drill that drills by using both rotation and striking.

The invention according to claim 3
A hole drilling method for a reinforced concrete structure according to claim 2,
After revolving a drill that drills holes using both the rotation and striking along the stand and integrally rotating at the tip of the stand, after extracting the drilling rod from the drilling hole,
Insert a long drilling rod longer than the stand into the drilling hole,
The drilling hole is drilled deeper than the length of the stand by the long drilling rod attached to a drill that drills using both rotation and hammering.

The invention according to claim 4
A hole drilling method for a reinforced concrete structure according to any one of claims 1 to 3,
The anti-rest member provided in the stand is used to drill a hole while preventing the drilling rod of the drill that drills by using both rotation and hammering together.

The invention described in claim 5
Reinforcing member insertion hole by drilling into the reinforced concrete structure with a drill for drilling using the rotation and striking together used in the method for drilling a reinforced concrete structure according to any one of claims 1 to 4. After forming
A shear reinforcing member is inserted into the reinforcing member insertion hole and a filler is injected.

The invention described in claim 6
A drilling device for use in a drilling method for a reinforced concrete structure according to any one of claims 1 to 4 or a shear reinforcement method for a reinforced concrete structure according to claim 5,
A drill for drilling holes by using both rotation and striking,
A stand formed by fixing a pole to a base board fixed to the reinforced concrete structure;
A clamp slidably assembled to the pole;
A connecting tool for assembling a drill for drilling a hole using the rotation and striking together with the clamp;
An anti-sway member that suppresses runout of a drilling rod of a drill that is attached to the pole and drills by using the rotation and striking together,
A dust collector that is attached to the base board and collects dust during drilling by a drill that drills using both rotation and blow, and
A rotating part is provided at the tip of the pole.

  According to the present invention, a reinforced concrete structure can be drilled with a drill that drills by using both rotation and hammering even in a narrow space while eliminating the need for large jigs, machines, and temporary installations.

It is a schematic diagram which shows the structure of one Embodiment of the shear reinforcement method of the reinforced concrete structure to which this invention is applied. It is a perspective view which shows the example of a drilling with the structure of the drilling apparatus used for the shear reinforcement method of FIG. It is the figure which showed the state which moved the drill which drills to the front-end | tip part of the stand of FIG. It is the figure which showed the example of a hole drilling performed after rotating the drill which drills using rotation and a blow of FIG. 3 together. A side view showing an example of drilling with a short drilling rod, a diagram (a) showing a state immediately before drilling, a diagram (b) showing an end state of drilling, and a diagram showing a state in which the drilling rod is removed (C). FIG. 5A is a side view showing an example of drilling with a long drilling rod, FIG. 5A shows a state in which the short drilling rod is removed and the drill is avoided upward, and a drilling rod with a long drilling hole Figure (b) showing the state of inserting a drill, Figure (c) showing a state in which a long drilling rod is mounted by returning the drill downward, and Figure (d) showing a state where a drilling has been completed with a long drilling rod. It is.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment)
FIG. 1 shows a configuration of an embodiment of a shear reinforcement method for a reinforced concrete structure to which the present invention is applied. 1 is a reinforced concrete structure, 2 is a shear reinforcement member, and 3 is a filler.

  As shown in the figure, a reinforcing member insertion hole 11 by a non-through hole is drilled from one side of the reinforced concrete structure 1 to be reinforced to the other side. The distal end portion of the reinforcing member insertion hole 11 is located on the front side of the back-side power distribution bar 12. The rear-side reinforcing bar 12 is a reinforcing bar that is attached to the main reinforcing bar 13 located on the other side of the reinforced concrete structure 1. Further, the diameter of the reinforcing member insertion hole 11 is uniform from the entrance side to the back side.

  The shear reinforcement member 2 includes a reinforcing bar 21 that functions as a main body portion, and a fixing body 23 provided on at least one of the distal end side or the proximal end side of the reinforcing bar 21. In the shear reinforcement member 2, the fixing member 23 may be provided on both the distal end side and the proximal end side of the reinforcing bar 21, or the fixing member 23 may be provided only on either the distal end side or the proximal end side of the reinforcing bar 21. Although it is good, especially by providing the fixing bodies 23 on both the distal end side and the proximal end side of the reinforcing bar 21, a strong fixing performance can be exhibited. The distal end portion of the shear reinforcement member 2 is inserted up to the front side of the force distribution bar 12 on the back side in correspondence with the perforated state of the reinforcement member insertion hole 11.

  The filler 3 is a member for filling the reinforcing member insertion hole 11 in which the shear reinforcing member 2 is inserted, and the injection timing is before or after the shear reinforcing member 2 is inserted into the reinforcing member insertion hole 11. It may be at any later time. As the filler 3, a mortar or a resin adhesive can be used.

  Specifically, the fixing body 23 includes a connecting member 27 to the reinforcing bar 21, a core member 24 protruding in the axial direction from the connecting member 27, and convex portions provided at predetermined intervals along the axial direction of the core member 24. The core part 24 and the convex part 25 form an uneven part. Each convex portion 25 has a tapered surface 26 whose diameter is reduced toward the connecting member 27 side. The angle of the tapered surface 26 is preferably about 45 degrees with respect to the axial direction from the viewpoint of increasing the fixing force of the fixing body 23.

  The reinforcing bar 21 to be attached to the connecting member 27 has a tip portion that is tapered, and a taper screw portion 22 is formed on the outer peripheral surface. The reinforcing bar 21 is preferably subjected to plastic hardening treatment at least at the proximal end portion of the taper screw portion 22. By subjecting the end of the reinforcing bar 21 to plastic hardening, the apparent yield point increases as compared to before processing, and the strength of the end of the reinforcing bar 21 can be increased. The connecting member 27 is a portion that connects the tip of the reinforcing bar 21, and is provided with a female screw portion 28 for screwing the taper screw portion 22. In this embodiment, the connection member 27, the core material 24, and the convex part 25 are integrally formed using the high strength steel material. In the illustrated example, the two convex portions 25 are provided, but the number of the convex portions 25 may be one or three or more.

  As shown in the figure, a reinforcing member insertion hole 11 having a uniform diameter from the proximal end portion to the distal end portion is perforated, and the distal end portion of the reinforcing member insertion hole 11 is on the front side of the rear-side distribution muscle 12. Is located. In the reinforcing member insertion hole 11, the fixing member 23 on the distal end side is positioned on the front side of the back-side distribution bar 12, and the fixing member 23 on the proximal end side is substantially the same position as the main reinforcing bar 13 on the front side. The shear reinforcement member 2 is inserted so that it may become. Accordingly, the covering thickness is equal to or greater than the covering thickness of the main reinforcing bar 13 on the distal end side of the shear reinforcing member 2, and the covering thickness is substantially equal to the covering thickness of the main reinforcing bar 13 on the proximal end side of the shear reinforcing member 2. The reinforcing member insertion hole 11 is filled with the filler 3 either before or after the shear reinforcing member 2 is inserted.

  In the above, drilling of the reinforcing member insertion hole 11 in the reinforced concrete structure 1 is performed using the drilling apparatus shown in FIG.

  FIG. 2 shows an example of drilling as well as the configuration of the drilling device. 4 is a drill for drilling by using both rotation and hammering, 5 is a stand, 6 is a clamp, 7 is a connection tool, 8 is a steady member, 9 is a dust collector.

As shown in the figure, the drill 4 that drills by using both rotation and striking includes a long drilling rod 41 and a hose connection part 42, and an air hose 43 is connected to the hose connection part 42.
Compressed air from an air compressor (not shown) is supplied through the air hose 43 to the drill 4 that drills holes using both rotation and hammering, and the drilling rod 41 rotates with hammering.

The stand 5 is a base board 51 in which a long pole 52 is fixed and integrated. In the illustrated example, the tip of the pole 52 formed by a square pipe is a rotatable rotating part 53.
The stand 5 has a base board 51 fixed to the reinforced concrete structure 1 with anchor bolts 101.

Specifically, a bottom-up anchor bolt 101 fixed to the reinforced concrete structure 1 is passed through a long hole 511 formed in the center of the base board 51 and fixed with a nut 102.
That is, in the stand mounting portion of the reinforced concrete structure 1, a hole is drilled in advance, and a sleeve provided with a wedge on the slit side end (not shown) is inserted into the hole, and driven into the sleeve. The slit side is expanded in diameter and fixed by a wedge.
An anchor bolt 101 is screwed into a female screw formed on the inner periphery of the sleeve, and the anchor bolt 101 is passed through a long hole 511 formed in the center of the base board 51 and fixed with a nut 102.
In this way, the stand 5 fixed to the expanded anchor bolt 101 fixed to the reinforced concrete structure 1 with the nut 102 in the central long hole 511 of the base board 51 rotates the adjustment bolts 512 provided at the four corners of the base board 51. The backlash with respect to the surface of the reinforced concrete structure 1 is adjusted and attached to the reinforced concrete structure 1 almost vertically.

  The clamp 6 is slidably assembled to the pole 52 of the stand 5 and includes a grip and a lever.

The connection tool 7 is fixed to the clamp 6, and the drill 4 that forms a hole by using both rotation and hammering can be attached and detached with a bolt and nut.
That is, the drill 4 that drills holes by using both rotation and striking is attached to the clamp 6 via the connector 7.

  The steady-rest member 8 has a through-hole through which the drilling rod 41 of the drill 4 drilling by using both rotation and striking is combined. The steady-rest member 8 is integrated with the fixture 81 and is connected to the pole 52 of the stand 5 with the base board 51. Is attached detachably with a fixture 81 and a nut.

The dust collector 9 has a through-hole through which the drilling rod 41 of the drill 4 that drills by using both rotation and hammering, and is detachably attached to the base board 51 with a bolt and nut via a bracket 91. Yes.
An air hose 92 is connected to the dust collector 9, and negative pressure air from an air pump (not shown) acts through the air hose 92. Thereby, dust at the time of drilling is sucked and collected.

  The reinforcing member insertion hole 11 is drilled into the reinforced concrete structure 1 by the drilling device having the above configuration.

  That is, FIG. 2 shows an example of drilling, as indicated by an arrow F while the operator supports the clamp 6 slidably assembled along the pole 52 of the stand 5 fixed to the reinforced concrete structure 1 with the hand. In addition, the reinforced concrete structure is moved forward by the rotation of the drilling rod 41 of the drill 4 which is advanced along the pole 52 and drilled by using both the rotation attached to the clamp 6 via the connector 7 and the hammering. 1, the reinforcing member insertion hole 11 is drilled.

Thus, the reinforcing member insertion hole 11 is formed by drilling a hole in the reinforced concrete structure 1 by advancing the drill 4 for drilling using both rotation and hammering along the stand 5 fixed to the reinforced concrete structure 1. .
Thereafter, as described with reference to FIG. 1, the shear reinforcement member 2 is inserted into the reinforcement member insertion hole 11 and the filler 3 is injected to reinforce the reinforced concrete structure 1.

  As described above, the reinforcing member insertion hole 11 can be drilled in the reinforced concrete structure 1 by the drill 4 that drills by using both the forward rotation and striking along the stand 5 fixed to the reinforced concrete structure 1. .

  In addition, the tip of the drilling rod 41 that rotates with striking the drill 4 that drills using both rotation and striking is attached to the pole 52 of the stand 5 with a fixture 81 and a nut in the vicinity of the base board 51. Further, since the vibration is suppressed through the through hole of the steady member 8, the shape of the reinforcing member insertion hole 11 can be ensured.

  The dust at the time of drilling by the drilling rod 41 that rotates with striking the drill 4 that drills by using both rotation and hammering is dust collector attached to the base board 51 of the stand 5 via the bracket 91. 9 can be sucked by negative pressure air acting on the air bag 9 and collected in a dust bag or the like through the air hose 92.

  FIG. 3 shows a state in which the drill 4 for drilling is moved to the rotating portion 53 at the tip of the pole 52 of the stand 5 by using both rotation and striking, and the clamp 6 is operated as indicated by the arrow B. After the person moves back along the pole 52 and moves to the rotating portion 53, as shown by the arrow R, the drill 4 that drills holes by using both rotation attached to the clamp 6 via the connector 7 and striking. Is rotated together with the rotating unit 53 at an arbitrary angle. In the example shown in the figure, the pole 52 formed by a square pipe is rotated by 90 degrees.

Prior to the rotation operation of the drill 4 for drilling holes by using both rotation and striking with respect to the stand 5 described above, the anti-rest member 8 is removed from the pole 52 together with the fixture 81 and the nut, and the dust collector is removed from the base board 51. 9 is removed together with the bracket 91.
Then, after the rotation operation of the drill 4 for drilling holes by using both rotation and striking with respect to the stand 5, the steadying member 8 is reattached to the pole 52 with the fixture 81 and the nut, and the dust collector 9 is bracketed to the base board 51. Reinstall with 91 and bolts and nuts.

  FIG. 4 shows an example of drilling after the drill 4 to be drilled using both rotation and hammering is rotated around the pole 52 of the stand 5. In the illustrated example, the drill 4 is positioned above the pole 52 of the stand 5. In a state where the drill 4 for drilling using both rotation and striking is arranged, as shown by the arrow F, the clamp 6 is advanced along the pole 52 and attached to the clamp 6 via the connector 7. The reinforcing member insertion hole 11 is drilled in the reinforced concrete structure 1 by the rotation accompanied by the drilling of the drilling rod 41 of the drill 4 that drills using both the hammering and the hammering.

  As described above, according to the method for shear reinforcement of a reinforced concrete structure using the hole drilling device of the embodiment, a drill that drills by using both rotation and striking that are slidably assembled to a stand 5 fixed to the reinforced concrete structure 1. 4, the reinforcing member insertion hole 11 is formed by drilling the reinforced concrete structure 1, and then the shear reinforcement member 2 is inserted into the reinforcement member insertion hole 11 and the filler 3 is injected. 1, the reinforcing member insertion hole 11 can be drilled by a drill 4 that drills by using both rotation and hammering in a narrow space, without requiring a large jig, machine, or temporary construction, and can be reinforced by shearing. .

By the way, for shear reinforcement, a deeper hole than a normal anchor is required.
According to the embodiment, drilling deeper than the height of the stand 5 can be performed by the procedure performed in FIGS. 5 and 6.

FIG. 5 shows an example of drilling with a short drilling rod 41S.
That is, as shown to Fig.5 (a), the short drilling rod 41S is mounted | worn with the drill 4 which drills using the rotation assembled | attached to the stand 5 fixed to the reinforced concrete structure 1 and hammering together.
Then, as shown in FIG. 5 (b), a shallow drilling hole 11S is formed by a short drilling rod 41S attached to a drill 4 that drills using both rotation and hammering.
After that, as shown in FIG. 5 (c), the drill 4 for drilling using both rotation and hammering is slid rearward along the pole 52 of the stand 5, and the short drilling rod 41S is moved from the shallow drilling hole 11S. Extract.

FIG. 6 shows an example of drilling with 41L on a long drilling rod.
That is, as shown in FIG. 6A, in the rotating portion 53 at the tip of the pole 52 of the stand 5, the drill 4 that drills holes by using both rotation and striking is avoided upward.
Further, as shown in FIG. 6B, a long drilling rod 41L is inserted into the shallow drilling hole 11S.
And as shown in FIG.6 (c), the drill 4 which drills using rotation and hammering together is returned below, and long drilling rod 41L is mounted | worn.
Thereafter, as shown in FIG. 6 (d), a deep drilling hole 11L is formed by a long drilling rod 41L mounted on a drill 4 for drilling by using both rotation and hammering.

  As described above, the small stand 5 used for the normal core drilling may be used while using the drill 4 for drilling by using both rotation and hammering in the drilling hole 11L deeper than the normal anchor. It leads to improvement of safety.

  In the above, the anchor bolt 101 having a nominal diameter of 12 mm or more can be used.

(Modification)
In the above embodiment, the hole drilling is performed with respect to the vertical plane. However, the present invention is not limited to this, and drilling with respect to the horizontal plane can be similarly performed. In that case, it can be handled with a low stand, and since the stand does not fall down, it can be drilled safely.
In the embodiment, the pole of the stand is a square pipe, but a round pipe may be used.
Furthermore, in the embodiment, the clamp is performed by manual operation, but an automatic clamp may be used.

Further, in the embodiment, the method for shear reinforcement of a reinforced concrete structure is used. However, the present invention is not limited to shear reinforcement and can be applied to any drilling holes for a reinforced concrete structure.
Furthermore, the shape of the reinforcing member insertion hole, the shear reinforcing member, the stand, the slider, the holder, the steadying member, and the like are arbitrary, and it is needless to say that other specific detailed structures can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Reinforced concrete structure 11 Reinforcement member insertion hole 12 Distribution bar 13 Main reinforcement 2 Shear reinforcement member 21 Reinforcement 22 Tapered screw part 23 Fixing body 24 Core material 25 Convex part 26 Tapered surface 27 Connecting member 28 Female screw part 3 Filler 4 Rotation Drill 41 that drills using both hammering and hammering Drilling rod 42 Hose connection part 43 Air hose 5 Stand 51 Base panel 511 Long hole 512 Adjustment bolt 52 Pole 53 Rotating part 6 Clamp 7 Connection tool 8 Stabilizing member 81 Mounting tool 9 Dust collector 91 Bracket 92 Air hose 101 Anchor bolt 102 Nut

Claims (6)

  Drilling while drilling forward with respect to the reinforced concrete structure by a drill for drilling by using a combination of rotation and striking movably assembled along a stand fixed to the reinforced concrete structure. Drilling method for reinforced concrete structures. After drilling the reinforced concrete structure with a drill that drills using both rotation and hammering,
Retracting the drill that drills using the rotation and striking together along the stand, and extracting the drilling rod from the drilling hole,
Insert a long drilling rod into the drilling hole,
Attach the long drilling rod to a drill that drills using both rotation and blow,
The method for drilling a reinforced concrete structure according to claim 1, wherein the drilling hole is deeply drilled by the long drilling rod mounted on a drill that drills using both rotation and hammering. . After revolving a drill that drills holes using both the rotation and striking along the stand and integrally rotating at the tip of the stand, after extracting the drilling rod from the drilling hole,
Insert a long drilling rod longer than the stand into the drilling hole,
The said drilling hole is deeply drilled more than the length of the said stand by the said long drilling rod with which the drill which drills using both the said rotation and an impact is combined, The length of the said stand is characterized by the above-mentioned. Drilling method for reinforced concrete structures.   4. The drilling device according to claim 1, wherein drilling is performed while preventing a drilling rod of a drill that drills by using both the rotation and the striking with a steadying member provided in the stand. Drilling method for reinforced concrete structures. Reinforcing member insertion hole by drilling into the reinforced concrete structure with a drill for drilling using the rotation and striking together used in the method for drilling a reinforced concrete structure according to any one of claims 1 to 4. After forming
A shear reinforcing method for a reinforced concrete structure, wherein a shear reinforcing member is inserted into the reinforcing member insertion hole and a filler is injected. A drilling device for use in a drilling method for a reinforced concrete structure according to any one of claims 1 to 4 or a shear reinforcement method for a reinforced concrete structure according to claim 5,
A drill for drilling holes by using both rotation and striking,
A stand formed by fixing a pole to a base board fixed to the reinforced concrete structure;
A clamp slidably assembled to the pole;
A connecting tool for assembling a drill for drilling a hole using the rotation and striking together with the clamp;
An anti-sway member that suppresses runout of a drilling rod of a drill that is attached to the pole and drills by using the rotation and striking together,
A dust collector that is attached to the base board and collects dust during drilling by a drill that drills using both rotation and blow, and
A drilling device comprising a rotatable rotating part at a tip of the pole.

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