JPH05162121A - Drill for boring concrete and boring method - Google Patents

Abstract

PURPOSE:To obviate an accident resulting in injury or death due to falling of a concrete block during a boring work, reduce the number of assistants required at a contruction site to achieve reduction of labor, and improve work efficiency. CONSTITUTION:A cylindrical drill 1 with a bottom plate has an opening on one end and a hollow mount 3 on the other end thereof, a plurality of cutting blades 2 being formed on said opening. A winding device 6 having a reel 61 having a return means 62 on one side thereof and a lock means 63 on the opposite side thereof is disposed on the bottom plate, a cord-like member 9 being wound around the reel 61. An unwinding means 10 is connected to a point near the end of the body 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a drill for concrete drilling, which is used for drilling work when it is necessary to drill on the wall surface or floor surface of a concrete building when performing piping work for refrigeration equipment and the like. And the perforation method.

[0002]

2. Description of the Related Art Generally, when drilling a concrete wall or a floor of a building, a dedicated electric drill is equipped with a drill having a hollow cylindrical shape and a tip as a cutting blade, and the drill is rotated to Through holes of desired size are drilled in concrete. This situation will be specifically described with reference to FIG. 5. At the work site, as shown in the figures, first, the concrete wall 4
At a predetermined position, the cutting blade 2 of the hollow cylindrical drill 1 having a cutting blade 2 at the tip is brought into contact, and the hollow mounting portion 3 of the drill 1 is mounted on the spindle of a dedicated electric drill (not shown), Immediately before finishing the punching of the concrete wall by rotating the cutting blade, an assistant is arranged, though not shown, to receive the punched concrete mass 4'using a stepladder or the like.

[0003]

However, as a practical problem, the following inconvenience occurs at the drilling work site. The enumeration is as follows: The placed assistant holds the punched concrete mass on the stepladder, so sometimes he loses his sense of balance, falls, or accidentally hits the concrete mass directly on his body.
Injury or other personal injury occurred. B: Due to the punched concrete block, not only the assistant at the drilling site but also the passerby may get injured in the head,
Or, an accident occurred that damages nearby objects. C: Immediately before finishing cutting the concrete block, temporarily stop the rotation of the drill and always place the assistant below to remove it while supporting the concrete block, so it is necessary to secure an assistant and save labor and work. It is inferior in both efficiency and has the drawbacks that workability is not yet sufficient, not to mention safety measures. The present invention is intended to solve the drawbacks of deficiency, and the purpose thereof is to prevent personal injury due to direct drop of concrete lumps during drilling work, and to assist an assistant required at the work site. It is to reduce the number of arrangements of the above to save labor and to improve the work efficiency.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, a drill having a bottomed cylindrical shape, one end of which is opened and the other end of which is provided with a hollow mounting portion 3 is formed in a plurality of cutting blades 2 and which has a bottom end. a 1, wherein the bottom portion includes a return device 6 ₂ on one side,
The locking device 6 ₃ to the other side, with respective intermediate retractor 6 reel ₆₁ is disposed wound cord-like member 9 is installed in, twist near the end of the string-like body Construction of a drill for concrete drilling, characterized in that the return 10 is connected, a step of stamping and fixing an anchor bolt at a predetermined drilling position on a concrete wall surface, and twisting a string-like body from a winding device in the drill A step of anchoring to the anchor bolt through a return step, a step of driving the drill to bring it into contact with the wall surface and punching it, and a step of finishing the drilling and being cut by the drill and suspended from the string-like body. Concrete drilling characterized by the steps of removing the string-shaped body from an anchor bolt stamped on concrete, and storing the string-shaped body in the winding device and pulling the drill away from the wall surface. Law, is achieved by.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific construction of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side sectional view of an essential part showing an embodiment according to the present invention. The same parts as those of the conventional type are designated by the same reference numerals, and the structural features of the present invention will be described. Then, the hollow mounting portion 3 is fixed to the other side by a bottomed cylindrical drill that is used as the cutting blade 2. Reference numeral 5 denotes a leg formed on the inner wall of the drill 1 having a bottom, to which a winding device 6 described later is fixed. 7
Is a partition wall for holding the winding device, which is not necessarily required, and is fixed to the fixing portion 8. 9, the string-like body formed of the loaded reel ₆₁ wound on the wire or synthetic resin fibers made of the band to the winding device 6 to be described later, 10 in untwisted exhibits a cylindrical, FIG shows a side 2 (1), the both ends are formed in a U shape, the locking pins P are fixed to the respective openings, and the middle is formed in the ball bearing b so that the both sides are rotatable with respect to each other. And the end face thereof is shown in (2) of the figure. As shown in FIG. 3, (1) is a plan view, (2) is a side view, and (3) is a bottom view of the same, as shown in FIG. With the anchor bolt having a shape, a plurality of grooves t are formed in the tubular portion toward the bottom, and inside each of the grooves t, a side trapezoidal sleeve T is slightly bited at the bottom. The sleeve T is fitted so as to come out, and when it is cast into concrete, the sleeve T is embedded in the tubular portion and is firmly identified in the concrete. FIG. 4 is a modification of the untwisting 10 and the anchor bolt 11 described above. A nut N is formed on one side (right side) of the untwisting 10, and a screw S is fixed to the nut. It is formed so as to be screwed into a female screw S ′ engraved on the head of 11, and thus the work of fixing the untwisting 10 and the anchor bolt 11 is simplified. Next, described take-up device 6 together with FIG. 1, 6 _1, with a reel wound around the string-like body 9, the reel is rotatably loosely fitted on the frame B exhibiting a U-shaped Has been done. 6 _2, the return device spiral return spring which is disposed on one side of the frame body B is loaded, the return spring, the outer end is fixed to the frame body B, the inner end of the be fixed to one of the reel ₆₁ of the rotating shaft, it gives a predetermined torque when being stretched string-like body 9 which is wound the reel ₆₁ wound, based on the position and the cord-like member is released It works to rewind automatically. 6 _3, wherein the lock device fixed to the other rotating shaft reel _61, when the string-like body 9 is rapidly Koin receives the rotation of the reel _61, instantly by the centrifugal force acting The shaft 6 is restrained and stopped to stop the stretching of the wound cord-like body 9. The winding device 6 is passed to the bottomed leg 5 as shown in FIG. It is fixed to the plate.

[0006]

The present invention has a ridged construction. Next, the operation and effect based on the construction will be described together with the embodiment of the invention. First, an anchor bolt is placed at a predetermined position on a desired wall surface of a concrete building. Carving 11
Next, the winding device 6 is attached to the engaging piece L of the anchor bolt 11.
The reels 6 string-like body 9 wound in _1, bear the tip through a 10 untwisted, in this state, attached to the drill 1 to a spindle of a dedicated electric drill (not shown), the cutting blade 2
To cover the engagement piece L of the carved anchor bolt as a center, and drive the drill in this state to start drilling, but during the drilling, water is continuously poured into the drill 1 from the mounting portion 3. Therefore, both the abrasion of the cutting blade 2 with the concrete 4 and the scattering of the concrete fine powder during drilling are prevented. Drilling approaches the end, 'Ya is outburst fall, the concrete mass 4' concrete mass 4 of the portion for the wire material 9 is pulled abruptly instant by the weight of, the rotation of KyuMadoka of the reel _61, the and rotation stop instantaneously operated locking device 6 ₃ by centrifugal force, the concrete mass 4 by the string-like body 9 'is hung as shown in FIG. 1 illustrated. Finally, the concrete block 4'in this state
It is only necessary to remove the string-like body 9 from the engaging piece L of the anchor bolt 11 engraved in and to remove the concrete block 4 '. According to the present invention, as described above, the anchor bolt 11 is engraved at a predetermined position on the concrete wall surface, and the engaging piece L is twisted with the string-like body 9 extended from the winding device 6 incorporated in the drill 1. It is only necessary to tie it through the return 10, and therefore the drilling operator does not have to consider the risk of dropping the concrete block 4'which occurs at the end of drilling, so that fatigue is reduced and efficient work is performed. On the other hand, an assistant who receives the concrete block 4'also has a problem that since the concrete block remains suspended at the end of drilling, it is less dangerous and can be removed by a small number of people. An excellent effect that can sufficiently achieve the purpose can be expected. As shown in FIG. 4, a screw S is attached to one of the untwisted portions 10 and a female screw S ′ is screwed onto the top of the anchor bolt 11 and is screwed into the screw S.
The one with the structure formed is appropriately used depending on the diameter of the hole to be drilled and the thickness of the concrete wall,
Since it suffices to simply tie the tip of the string-like body 9 to the locking pin P of the anchor bolt 11, this allows quicker work than the above-mentioned attaching of the string-like body, and the work is completed more efficiently. At the time of removal, the nut N has been rotated, and the anchor bolt 11 is discarded.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing an embodiment of the present invention,

2 (1) is a side view of untwisting, (2) is both end views thereof,

3 (1) is a plan view of an anchor bolt, (2) is a side view, (3) is a bottom view, FIG.

FIG. 4 is a side view showing a modification of the anchor bolt and untwisting,

FIG. 5 is a side view of an essential part showing a conventional type.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 drill 2 cutting blade 3 attachment part 4 concrete wall 4'concrete lump 5 leg part 6 winding device 6 ₁ reel 6 ₂ return device 6 ₃ locking device 7 bulkhead 8 fixing part 9 cord-like body 10 twisting back 11 anchor bolt B frame Body b Ball bearing L Engagement piece P Locking pin S Screw S'Female thread T Sleeve t Groove

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[Procedure amendment]

[Submission date] September 3, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, a drill having a bottomed cylindrical shape, one end of which is opened and the other end of which is provided with a hollow mounting portion 3 is formed in a plurality of cutting blades 2 and which has a bottom end. a 1, wherein the bottom portion includes a return device 6 ₂ on one side,
The locking device 6 ₃ to the other side, with respective intermediate retractor 6 reel ₆₁ is disposed wound cord-like member 9 is installed in, twist near the end of the string-like body Construction of a drill for concrete drilling, characterized in that the return 10 is connected, and a step of stamping and fixing an anchor bolt at a predetermined drilling position on a concrete floor surface or wall surface , and a string shape from a winding device in the drill Anchoring the body to the anchor bolt through untwisting, and driving the drill to the floor
A step of abutting against a surface or a wall surface to perforate the surface, and a step of removing the string-like body from an anchor bolt stamped on the concrete suspended by the drill after finishing the perforation The step of accommodating the string-shaped body in the winding device and separating the drill from the floor surface or the wall surface, the concrete drilling method.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction content]

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific construction of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the concrete according to the present invention.
In a side sectional view of an essential part showing an embodiment applied to the floor surface of a chair, the same parts as those of the conventional type are designated by the same reference numerals, and the structural features of the present invention will be described. Then
A bottomed cylindrical drill having a cutting blade 2 and a hollow mounting portion 3 fixed to the other end is a leg portion formed on the inner wall of the bottomed portion of the drill 1. The winding device 6 described later is fixed. Although not necessarily required, 7 is a partition wall for holding the winding device and is fixed to the fixing portion 8. 9, the string-like body formed of the loaded reel ₆₁ wound on the wire or synthetic resin fibers made of the band to the winding device 6 to be described later, 10 untwisted exhibits a tubular,
As shown in (1) of FIG. 2 showing the side surface, both ends are formed in a U shape, and locking pins P are fixed to the respective openings,
A ball bearing b is formed in the middle so that both sides are rotatable with respect to each other, and the end face thereof is shown in (2) of the figure. 11 is
As shown in FIG. 3A, a plan view, a side view in FIG. 2B, and a bottom view in FIG. 3C show a tubular shape having an engagement piece L at the tip. With the anchor bolt, a plurality of grooves t are formed in the tubular portion toward the bottom portion, and a sleeve T formed in a trapezoidal side surface is fitted inside each groove t so that the bottom portion slightly protrudes. When it is worn and cast into concrete, the sleeve T is embedded in the tubular portion and firmly fixed to the concrete. FIG. 4 is a modification of the untwisting 10 and the anchor bolt 11 described above. A nut N is formed on one side (right side) of the untwisting 10, and a screw S is fixed to the nut. It is formed so as to be screwed into a female screw S ′ engraved on the head of 11, and in this way the work of fixing the untwist 10 and the anchor bolt 11 is simplified. Next, described take-up device 6 together with FIG. 1, 6 _1, with a reel wound around the string-like body 9, the reel is rotatably loosely fitted on the frame B exhibiting a U-shaped Has been done. 6 _2, the return device spiral return spring which is disposed on one side of the frame body B is loaded, the return spring, the outer end is fixed to the frame body B, the inner end of the Reel 6
Be fixed to one of _a rotation shaft, it gives a predetermined torque when being stretched string-like body 9 which is wound the reel ₆₁ wound, automatically based on the position and the cord-like member is released It works to rewind to. 6 _3, wherein the lock device fixed to the other rotating shaft reel _61, when the string-like body 9 is rapidly Koin receives the rotation of the reel _61, instantly by the centrifugal force acting axial restraint to stop, intended to act to stop the stretching of the string-like body 9 which is wound, the winding winding device 6,
As shown in FIG. 1, it is fixed to a plate body passed over the bottomed leg portion 5.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

Industrial Applicability The present invention has a ridged construction. Next, the operation and effect based on the construction will be described together with the embodiment of the present invention. First, an anchor is provided at a predetermined position on a desired floor surface of a concrete building. Bolt 11 is engraved,
Next, the winding device 6 is attached to the engaging piece L of the anchor bolt 11.
The reels 6 string-like body 9 wound in _1, bear the tip through a 10 untwisted, in this state, attached to the drill 1 to a spindle of a dedicated electric drill (not shown), the cutting blade 2
To cover the engagement piece L of the carved anchor bolt as a center, and drive the drill in this state to start drilling, but during the drilling, water is continuously poured into the drill 1 from the mounting portion 3. and turned by a, the thus to scattering of the concrete fines in perforation and abrasion of the concrete 4 of the cutting blade 2, so as to prevent both. Drilling approaches the end, 'Ya is outburst fall, the concrete mass 4' concrete mass 4 of the portion for the wire material 9 is pulled abruptly instant by the weight of, the rotation of KyuMadoka of the reel _61, the and rotation stop instantaneously operated locking device 6 ₃ by centrifugal force, the concrete mass 4 by the string-like body 9 'is hung as shown in FIG. 1 illustrated. Finally, the concrete block 4'in this state
It is only necessary to remove the string-like body 9 from the engaging piece L of the anchor bolt 11 engraved in and to remove the concrete block 4 '. According to the present invention, as described above, concrete
It suffices to engrave the anchor bolt 11 at a predetermined position on the floor surface, and to tie the engaging piece L with the string-shaped body 9 extended from the winding device 6 built in the drill 1 through the untwisting 10. Since the drilling operator does not have to consider the risk of dropping the concrete block 4'at the end of drilling, fatigue is reduced and efficient work can be performed, while the auxiliary block for receiving the concrete block 4'is assisted. who also, since the left the concrete mass is suspended from at drilling completion, less risk, and wanted to be removed with a small number of people, it can be expected excellent effects that can sufficiently achieve the object of the present invention plant life .. As shown in FIG. 4, a screw S is attached to one of the untwisted portions 10 and a female screw S ′ is screwed onto the top of the anchor bolt 11 and is screwed into the screw S.
The one with the structure formed is appropriately used depending on the diameter of the hole to be drilled and the thickness of the concrete wall,
Since it suffices to simply tie the tip of the string-like body 9 to the locking pin P of the anchor bolt 11, this allows quicker work than the above-mentioned attaching of the string-like body, and the work is completed more efficiently. At the time of removal, the nut N has been rotated, and the anchor bolt 11 is discarded.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of reference numerals] 1 drill 2 cutting blade 3 attachment part 4 concrete floor or wall 4'concrete block 5 leg part 6 winding device 6 ₁ reel 6 ₂ return device 6 ₃ locking device 7 partition wall 8 fixing part 9 string-like body 10 Untwisting 11 Anchor bolt B Frame b Ball bearing L Engaging piece P Locking pin S Screw S'Female screw T Sleeve t Groove

Claims (2)

[Claims] 1. A mounting portion 3 which is open on one side and hollow on the other side.
A drill 1 having a bottomed cylindrical shape, the open end portion of which is formed on a plurality of cutting blades 2, wherein the bottomed portion includes:
A return device 6 ₂ on one side, the locking device 6 ₃ on the other side,
The reels 6 ₁ each provided with a cord 9 wound between them
1. A drill for concrete drilling, characterized in that a winding device 6 in which is provided is installed, and a twisting back 10 is connected near the tip of the string-shaped body. 2. A step of stamping and fixing an anchor bolt at a predetermined drilling position on a concrete wall surface, a step of anchoring a string-like body from a winding device in the drill to the anchor bolt through untwisting, and the drill. Driving the above-mentioned wall surface to bring it into contact with the wall surface and perforate the wall surface, and removing the string-like body from the anchor bolt that is cut by the drill and hung on the concrete-like body and hung in the concrete A method of piercing concrete, comprising the steps of: storing the cord-like body in the winding device and separating the drill from the wall surface.