JP2013032669A - Bit for drilling, drilling device using the same, and drilling method and breaking method of concrete structure and rock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bit for drilling, capable of continuously and efficiently forming a connection hole in a groove shape.SOLUTION: A bit 10 for drilling mounted on a distal end of a drill rod 32 comprises: a bit body 11; a bit body head part 12 having, on a drilling side, an opening 13 for jetting air or a water stream for discharge of the bit body; a plurality of chip attaching seats 16 arranged at intervals so as to be radial toward an outer periphery of the head part 12 along the opening 13 on the drilling side of the head part 12; and carbide chips 17, 18 fixed to the chip attaching seats and having a corner part at a distal end. The carbide chips are divided and arranged on an outer peripheral side and an opening side of the head part, the carbide chip 18 on the outer peripheral side of the head part is fixed such that the entire base part of the chip is settled inside the head part, and the carbide chip 17 on the side of the opening 13 is fixed such that a length direction end part on the side of the opening 13 is projected to the opening 13 and the entire base part other than the projected part is settled inside the bit body head part 12.

Description

  The present invention can effectively suppress noise, vibration, generation of dust, and scattering of crushed materials when concrete structures such as buildings and roads or rocks are crushed. Bits for drilling that can drill a part at the same time as a concrete part to form a groove-like connecting hole continuously and efficiently, thereby realizing an efficient and reliable concrete structure or rock crushing Further, the present invention relates to a drilling device and a concrete structure using the same, a rock drilling method and a crushing method.

  Conventionally, in the demolition work of a concrete structure such as a building or a road, a work for crushing and removing part or all of the concrete structure is performed. For this demolition work, the blasting method is economically and economically superior. However, noise and vibration caused by blasting have a significant effect on existing structures. In particular, there are many urban areas in the building demolition site, and it is more common not to use this blasting method.

  As an alternative to the blasting method, for example, a number of holes are drilled in a concrete structure, a wire saw is wound in a slit formed by these holes, the concrete structure is cut into blocks and crushed, A method of drilling a number of holes in a concrete structure in succession to form one or more free surfaces and removing the part surrounded by these free surfaces with a concrete breaker, or also one or more free in the concrete structure A method of crushing a concrete structure or rock by forming a surface and forcibly displacing the concrete structure toward the one or more free surfaces is known.

  As a method for forming one or a plurality of free surfaces in a concrete structure, for example, Patent Document 1 proposes. In this method, as shown in FIG. 8, first, the annular hole is formed in the rock surface 1 by the operation of the annular drilling drill 2 mounted on the excavator 1, and at the same time, the cantilever cylindrical shape is formed. Then, the drilling direction of the drilling drill 2 is regulated by using the core portion 3A remaining in the rock as a guide core. Further, the drilling means 4 is moved so as to have a predetermined overlapping portion with the annular hole 3B at a position adjacent to the core part 3A, and the annular holes 3B are sequentially formed while the core part 3A remains in the rock. The continuous groove-like portion is formed.

  As shown in FIG. 9, the annular bit 5 provided at the tip of the drill of the excavator used in this method is a hollow tube made of a hard alloy having an annular shape. The chip 6 is fixed in an embedded state. The metal chip 6 is formed so as to protrude about 3 to 4 mm from the inner and outer diameters of the annular bit 5, and has a predetermined thickness between the inner and outer surfaces of the annular bit 5 and the rock surface when the rock is drilled. An inner and outer annular clearance is formed. Then, flushing water containing fine crushed pieces flows backward from the face side through the annular clearance portion, so that the crushed pieces generated at the tip in the hole are discharged out of the hole.

  However, since the metal tip of the annular bit used in the above method is fixed so as to protrude on the inner and outer surfaces of the tip end surface of the bit, for example, when drilling by rotating the annular bit while rotating, If a reinforcing bar is included in the structure, the part of the metal chip that protrudes from the inner and outer surfaces may be lost in a short time, and drilling of the reinforcing bar part at the same time as the concrete part of the concrete structure is performed continuously and accurately. There was a problem that it could not be carried out automatically.

  As a drilling bit for drilling a reinforcing bar and concrete at the same time in the demolition work of a concrete structure such as a building, the one shown in Patent Document 2, for example, is proposed in FIGS. 10 and 11. As shown, tip mounting seats 53 projecting in four directions are formed at equal intervals in the circumferential direction of the head 52 of the base 51 having mounting means to the rod 50, and the rotation direction of the rod 50 in each tip mounting seat 53 is shown. In the drilling bit in which the chips 54 are fixed to the portions facing each other so as to form a cross shape and the cutting edges 54a are formed at the corners facing the rotation direction of these chips 54, the diameter direction of the head 52 A portion located at the center of the front end surface of the head 52 by integrally connecting a pair of tips 54 arranged in a single character to each other with a constant front end angle. While the sharp edges 54b are formed, the inner ends of the other pair of chips 54 that are arranged in a single letter shape with the same tip angle so as to intersect the chips 54 at right angles are cut out. 54, the inner end of the tip cutting edge is spaced apart from the sharp edge 54b, the sharp end protrudes forward from the notch, and the tip surface of each chip 54 is further pointed to the tip. The tip surface of the tip mounting seat 53 is formed into an inclined surface that is continuously inclined to the relief surface 54d of each tip 54, and is formed on the relief surface 54d inclined from the cutting edge with a certain relief angle with respect to the rotation direction. The flank 54d of the chip 54 and the inclined surface form a striking surface against the concrete.

  According to this drilling bit, there is an advantage that the chip fixed in a cross shape can simultaneously drill the reinforcing bar and the concrete in the concrete structure as they are, and the concrete structure can be efficiently crushed.

  However, in this drilling bit, when it hits the reinforcing bar while drilling in the concrete part, the reinforcing bar is cut and removed by rotating it while pressing the bit tip surface against the reinforcing bar without hitting the bit. Even in this drilling bit, there was a problem that it was not possible to continuously and accurately and efficiently drill the reinforcing bar portion simultaneously with the concrete portion of the concrete structure.

JP 7-217364 A JP 2007-23690 A

  The present invention can effectively suppress noise, vibration, generation of dust, and scattering of crushed materials when concrete structures such as buildings and roads or rocks are crushed. Bits for drilling that can drill a part at the same time as a concrete part to form a groove-like connecting hole continuously and efficiently, thereby realizing an efficient and reliable concrete structure or rock crushing An object of the present invention is to provide a drilling device, a concrete structure, a rock drilling method and a crushing method using the same.

In order to achieve the above-mentioned daily achievement, the present invention is a drilling bit attached to a tip of a drill rod of a drilling device,
A cylindrical bit body,
A head having an opening on the perforation side from which the discharge air of the bit body is ejected; and
A plurality of chip mounting seats arranged at intervals so as to be radial toward the outer periphery of the head along the opening on the perforation side of the head;
A cemented carbide tip made of a cemented carbide body having a corner at a tip fixed to the plurality of chip mounting seats, and the cemented carbide chip is divided into an outer peripheral side and an opening side of the head. The carbide tip on the outer peripheral side of the head is fixed so that the entire base portion of the tip fits in the head of the bit body, and the carbide tip on the opening side has a length on the opening side. The gist of the perforating bit is characterized in that the end portion in the length direction projects into the opening, and the base portion other than the projecting portion is fixed so as to fit within the head of the bit body.

  The present invention further includes a second cemented carbide chip that is fixed so that the entire base portion of the chip having a length extending over the entire length in the thickness direction of the head of the bit body fits within the head of the bit body. The gist of the drilling bit characterized by this may be used as the gist thereof.

The present invention is a drilling device,
A drill rod,
The drilling bit of the present invention attached to the tip of the drill rod;
The excavator may include a guide member disposed adjacently along the drilling bit via a connecting member attached to the drill rod.

The present invention is a concrete structure, a rock crushing method,
A concrete structure to be crushed using the excavator of the present invention, drilling a first hole at a desired depth in a desired position of a rock,
Next, by inserting a guide member adjacently disposed along the drilling bit through the connecting member into the first hole drilled in the concrete structure and rock, the distance from the first hole is increased. While maintaining the close state and regulating the drilling direction, drilling a second hole using the excavator, and repeating this, drilling a number of consecutive holes, the concrete structure, Forming one or more free surfaces in the rock,
Then, the concrete structure and the rock may be forcedly displaced to the one or more free sides to crush the concrete structure and the rock.

  The gist of the present invention is a method for demolishing a building using the concrete structure and the method for crushing rock according to the present invention.

  The drilling device of the present invention may include a drill rod and the drilling bit of the present invention attached to the tip of the drill rod.

The concrete structure of the present invention, the rock drilling method,
A concrete structure to be crushed by using the excavating apparatus of the present invention, a first hole is drilled at a desired depth in a desired position of a rock, and then a guide is disposed adjacently along the drilling bit via a connecting member. By inserting the member into the first hole drilled in the concrete structure and rock, the gap between the first hole is maintained in a close state, and the drilling direction is restricted while Drill a second hole using a drilling device and repeat this to drill a number of consecutive holes to form one or more free-form continuous holes in the concrete structure, rock,
By drawing a desired shape on the concrete structure and rock to be crushed, and using the other excavating apparatus of the present invention, a plurality of holes constituting the drawn shape are brought close to each other and drilled at a desired depth, so that a large number of A continuous hole may be drilled to form one or a plurality of free-shaped connection holes in the concrete structure or rock, and may be drilled by at least one of the methods.

  As shown in FIGS. 1 and 4, the drilling bit 10 according to the present invention has cemented carbide chips 17, 18 along the perforation side opening 13 of the head 12 of the bit body 11 and the outer periphery of the head 12. The carbide chip 18 on the outer peripheral side of the head 12 is fixed so that the entire chip can be accommodated in the head 12 of the bit body 11. The carbide tip 17 on the opening 13 side, whose one end in the length direction on the 13 side protrudes into the opening 13, is fixed so as to fit within the head 12 of the bit body 11 except for the protruding portion. Therefore, it is not easily lost even by a striking force applied during drilling. For this reason, for example, a concrete structure including a reinforcing bar part such as a building or a road can be drilled in the concrete part and the reinforcing bar part continuously and efficiently, and the cemented carbide chip may be lost in a short time. Therefore, the drilling operation can be performed without replacement over a long period of time.

  In the excavating apparatus 31 of the present invention, as shown in FIG. 2, the drilling bit 10 of the present invention is attached to the tip of the drill rod 32 and via a connecting member 33 attached to the drill rod 32. Since the guide member 33 is adjacently disposed along the drilling bit 10, as shown in FIGS. 3 (a) and 3 (b), the drilling bit 10 attached to the tip of the drill rod 32 is used for the concrete structure. Alternatively, after the hole H is drilled in the rock X, the guide member 34 is inserted into the hole H, so that when the concrete structure or the rock X is drilled by the drilling bit 10, the direction of the drilling is performed by the guide member 34. Are now regulated. Further, since the guide member 34 is adjacently disposed along the drilling bit 10 by the connecting member 33, the gap between the hole H into which the guide member 34 is inserted and the hole H to be drilled with the drilling bit 10. Since the gap is kept close, the partition that separates the hole H drilled by the drill bit 10 and the hole H into which the guide member 34 is inserted is crushed by vibration during drilling of the drill bit 10. It has become so. As a result, in the excavator 31 of the present invention, the concrete structure or the rock X is repeatedly drilled by the drilling bit 10 while being guided by the guide member 34, so that the groove is connected to the concrete structure or the rock X. The hole (free surface) F can be formed continuously and efficiently.

  In the concrete structure and rock crushing method of the present invention, as shown in FIGS. 2, 3 and 5, one or a plurality of free structures formed on the concrete structure or rock X by the excavator 31 of the present invention. Because the concrete structure or rock X is crushed by forcibly displacing it to the surface F side, the concrete structure is efficiently and reliably produced while generating noise, vibration and dust, and suppressing the scattering of the crushed material. Or, rocks can be crushed.

  According to the drilling device of the present invention, since the drilling bit alone has a good straight drilling property, even if only the drilling bit of the present invention attached to the tip of the drill rod is provided, the desired position can be sufficiently obtained. The holes can be drilled accurately.

According to the concrete structure of the present invention, the rock drilling method,
A concrete structure to be crushed by using the excavating apparatus of the present invention, a first hole is drilled at a desired depth in a desired position of a rock, and then a guide is disposed adjacently along the drilling bit via a connecting member. By inserting the member into the first hole drilled in the concrete structure and rock, the gap between the first hole is maintained in a close state, and the drilling direction is restricted while Drilling a second hole using a drilling device and repeating this to drill a number of consecutive holes to form one or more free-form connecting holes in the concrete structure, rock,
By drawing a desired shape on the concrete structure and rock to be crushed, and using the other excavating apparatus of the present invention, a plurality of holes constituting the drawn shape are brought close to each other and drilled at a desired depth, so that a large number of Perforating continuous holes to form one or more free-form connecting holes in the concrete structure, rock, or at least one of the methods,
In any case, as illustrated, the hole for standing the H-shaped steel can be a hole along the shape, the amount of crushed material discharged for drilling is small, and the remaining part is standing upright. Since the circumference of the H-shaped steel to be installed is surrounded along the shape, the amount of concrete to be put in between the gaps can be reduced, and the strength of the original remaining portion is also shared in strength. The standing state can be maintained.

It is a partial cross section front view which shows the bit for a hole of this invention. It is a perspective view which shows the excavation apparatus which mounted | wore the drill bit of this invention with the drill bit. It is a schematic diagram showing a process of forming a groove-shaped connecting hole using the excavator of the present invention, (a) and (b) shows a state of drilling the first hole in the concrete structure, rock, (C) and (d) show a state in which the guide member is inserted into the hole that is first drilled, and the second hole is drilled by the drilling bit while being guided by the guide member. FIG. 4 is an enlarged view of the punching pit shown in FIGS. 3B and 3D as viewed from the bit body head side. The schematic diagram which showed the state which crushes a concrete structure and a rock by forcibly displacing to a 1 or several groove-shaped connection hole (free surface side) formed in a concrete structure and a rock using the excavator of this invention. It is. (A) is a perspective view showing another example of a drilling device in which the drilling bit of the present invention is mounted on the tip of a drill rod, and (b) is a drilling in advance on the surface to be drilled when this drilling device is used. The perspective view which shows the drawing guide plate for drawing the shape of a power connection hole (A) to (d) is a diagram illustrating various shapes of connecting holes that can be excavated by the excavator of FIG. 2 and the excavator of FIG. 6. It is the schematic diagram which showed the process of forming a groove-shaped connection hole in a concrete structure using the conventional excavation apparatus. It is the perspective view which showed the bit for drilling with which the front-end | tip of the drill rod of the excavator shown in FIG. 8 is mounted | worn. It is the expansion perspective view which showed the conventional drilling bit. It is an expanded sectional view which shows the state which has drilled the hole in the concrete structure using the bit for drilling shown in FIG.

DESCRIPTION OF SYMBOLS 10 ... Bit for drilling 11 ... Bit body 12 ... Head 13 ... Opening 16 ... Tip mounting seat 17, 18, 19 ... Carbide tip 21 ... Clearance 22 ...・ Recess 31, 31A ... excavator 32 ... drill rod 33, 33A ... connecting member 34 ... guide member H ... hole F ... free surface

<Embodiment 1>
Hereinafter, a drill bit, a drilling apparatus and a concrete structure using the same, and a rock crushing method according to the present invention will be described in more detail with reference to the drawings. First, the punching bit shown in FIGS. 1 to 4 will be described. The drilling bit 10 is attached to the tip of the drill rod 32 of the excavation storage 31 and the drill rod 32 is in a state where the head 12 of the bit body 11 is in contact with the crushing surface of the concrete structure or rock X. The desired hole H can be drilled in the concrete structure or rock X by striking while rotating through the rock.

  The bit body 11 of the pit 10 for drilling has a cylindrical shape, and discharge air or water flow for discharging crushed pieces (sludge) from the excavation storage 31 side passes through the bit body 11, It ejects from the opening 13 provided in the head 12 of the main body 11. A screw 14 is formed on the outer peripheral surface of the base end portion of the bit body 11. Further, eight tip mounting seats 16 are arranged on the side surface of the head 12 of the bit body 11 so as to be radially spaced along the opening 13 toward the outer periphery of the head 12. .

  Carbide tips 17, 18, 19 made of a superhard body are fixed to each chip mounting seat 16 by brazing with, for example, silver brazing or copper brazing. Each of the cemented carbide chips 17, 18, 19 is provided with corners 17a, 18a, 19a at the tips, and the corners 17a, 18a, 19a are concrete structures when drilled as shown in FIGS. 3 (a) and (c). Alternatively, it comes into contact with the drilling surface of the rock X.

  The cemented carbide chips 17 and 18 and the cemented carbide chips 19 are alternately arranged. Among these cemented carbide chips 17, 18, and 19, the cemented carbide chip 19 includes the bit body 11 as shown in FIG. 4. In the thickness direction of the head 12, the entire length of the head 12 is fixed so that the entire base portion of the chip fits in the head 12, so that it is not easily lost even by a striking force applied during drilling. It has become. On the other hand, the carbide tips 17 and 18 are arranged separately on the outer peripheral side of the head 12 and the opening 13 side, and the base of the carbide tip 18 on the outer peripheral side fits inside the head 12. Thus, it is prevented from being easily lost even by a striking force applied during drilling. The carbide tip 17 on the side of the opening 13 is fixed so that the base portion thereof is accommodated in the head 12 except for a portion protruding to the side of the opening 13 and is not easily lost even by a striking force applied during drilling. . Further, the portion of the carbide tip 17 on the opening 13 side that protrudes toward the opening 13 side is a bit body when a hole H is drilled in a concrete structure or rock X as shown by the arrows in FIGS. A clearance 21 is formed between a layer 20 made of crushed pieces formed in the vicinity of the opening 13 side of the bit body 11 through the opening 13 of the bit body 11 and the inner peripheral surface of the bit body 11. In the process of discharging air or water flow through, the crushed pieces of the crushed piece layer 20 are also sucked up and discharged to the opening 13 side.

  As shown by the arrows in FIGS. 3B and 3D, the crushed pieces discharged to the opening 13 side together with the discharging air or water flow, as shown in the arrows in FIGS. 18 and 19, and a groove 15 formed on the outer surface of the head 12 of the bit body 11 and the outer peripheral surface of the bit body 11 indicated by the arrow in FIG. It is discharged to the rear drill rod 22 side through a gap 23 formed between the rock X and the drilled hole surface.

  In the example shown in FIG. 1 to FIG. 4, the carbide body has a length extending over the entire length in the thickness direction of the head portion of the bit body, and the cemented carbide is fixed so that the entire chip fits in the head portion 12. The chips 19 and the carbide tips 17 and 18 arranged alternately on the outer peripheral side of the head 12 and the opening 13 side are alternately provided, but are divided into the outer peripheral side of the head 12 and the opening 13 side. It can also consist only of the disposed carbide tips 17 and 18.

  Next, an excavator equipped with the drilling bit of the present invention will be described. As shown in FIG. 2, the drilling device 31 for drilling bit according to the present invention includes an annular drill rod 32, a drilling bit 10 attached to the tip of the drill rod 32, and a connection attached to the drill rod 32. And a guide member 34 disposed adjacent to the perforating bit 10 via the member 33.

  A discharge air or water flow is fed into the annular drill rod 32 from a compressor or pump (not shown), and the discharge air or water flow is drilled to be attached to the tip of the drill rod 32. The concrete structure or the crushed pieces from the rock X which are sent to the bit 10 and crushed by the drilling bit 10 are discharged together with air or water flow.

  In addition, the excavator 31 is provided with a dust collector (not shown), which removes the crushed pieces from the air or water flow discharged together with the crushed pieces, and again discharges air through a compressor or a pump (not shown). Alternatively, a water flow is sent to the drill rod 32.

  In addition, the excavator 31 includes a rotation drive unit that rotates the drilling bit 10 attached to the tip of the drill rod 32 and an impact drive unit that applies an impact force to the drilling bit 10.

  Hereinafter, a process of forming a groove-like connecting hole in a concrete structure (for example, a building or a road) including a reinforcing bar portion using this excavator, crushing it, and disassembling it will be described. First, as shown in FIG. 2, the drilling bit 10 is attached to the tip of the drill rod 32 of the excavator 31, and then, as shown in FIGS. 1, 2, 3 (a) (b) and 4, The head 12 of the bit body 11 is pressed against the perforated surface of the concrete structure X.

  Next, a hole H is drilled in the concrete structure X by striking the drilling pit 10 while rotating it through the drill rod 32. By striking the drilling bit 10 while rotating it, the cemented carbide tip 10 of the head 12 of the bit body 11 repeatedly strikes the drilling surface of the concrete structure X, and the concrete part and the reinforcing bar part of the concrete structure X are drilled. . As shown in FIG. 3B, the crushed pieces generated by the perforation are retained near the head opening in the bit body 1. At this time, the layer 20 made of crushed pieces is between the inner peripheral surface of the bit body 11 by the length direction end portion of the carbide tip 17 protruding into the opening 13 of the pit body 11 of the drilling bit 10. A clearance 21 is formed, and in the process of discharging air or water flow to the opening 13 side through the clearance 21, the fragments 20 of the fragmented piece 20 are also sucked up and discharged to the opening 13 side. It has come to be.

  Next, as shown in FIGS. 3C and 3D, after a hole H is drilled in the concrete structure X with the drilling bit 10 attached to the tip of the drill rod 32, a connecting member is connected to the drill rod 32 in the hole H. A guide member 34 attached via 33 is inserted. Accordingly, when the next hole H is drilled in the concrete structure X by the drilling bit 10, the drilling direction is regulated by the guide member 34. Further, since the guide member 34 is adjacently disposed along the drilling bit 10 by the connecting member 33, the distance between the hole H into which the guide member 34 is inserted and the newly drilled hole H is kept close to each other. Therefore, the partition wall that separates the hole H drilled by the drilling bit 10 and the hole H into which the guide member 34 is inserted is crushed by vibration during drilling of the drilling bit 10. It has become. As a result, in the excavator 31 of the present invention, the concrete structure X is repeatedly drilled by the drilling bit 10 while being guided by the guide member 33, whereby the concrete structure X has one or more as shown in FIG. The groove-like connecting hole (free surface) F is formed continuously and efficiently. Note that FIG. 3 shows an example in which the tip of the guide member 34 is inserted up to the hole bottom of the hole H, in which the guide member 34 is attached to the drill rod 32 via the connecting member 33. As described above, the distance between the hole H and the perforated hole H is kept close to each other and the direction of the hole is regulated, so that it is not necessary to insert the tip of the hole H to the hole bottom. For this reason, the guide member 34 does not necessarily need to have a length that reaches the bottom of the hole H, and when the guide member 34 having a short length is used, the insertion work into the hole H is easier. It will be a thing.

  Thus, after one or more groove-shaped connecting holes (free surfaces) F are formed in the concrete structure X, the concrete structure X is crushed by forcibly displacing the one or more free surfaces F side. Although the method of forcibly displacing the free surface F side is arbitrary, for example, the pressing device 40 shown in the enlarged view in FIG. 5 can be used. This pressing device 40 is provided with pressing portions 41 at predetermined intervals on both surfaces over the length direction of the device main body 41, and this pressing portion 42 is formed by two hydraulic jacks built in the device main body 41. It appears from the side of the main body 41. Then, by inserting the pressing device 40 into the hole H and causing the pressing portion 42 to protrude sideways, the pressing portion 42 has one or more groove shapes as shown by arrows in the enlarged view of FIG. The inner peripheral surface of the hole H constituting the connecting hole (free surface) F is pressed to forcibly displace one or a plurality of groove-shaped connecting holes (free surface) F. Thereby, the concrete structure X is reliably crushed without generating noise and vibration.

<Embodiment 2>
FIG. 6A is a perspective view showing another example of a drilling device in which the drilling bit of the present invention is attached to the tip of a drill rod, and FIG. 6B shows a surface to be drilled in advance when this drilling device is used. It is a perspective view which shows the drawing guide plate for drawing the shape of the connection hole which should be drilled. Thus, the parts already described are assigned the same reference numerals and redundant description is omitted.

  The drilling device 31A of FIG. 6A has a configuration in which the guide member 34 and the drill rod 32 therefor are not provided, and the drilling bit 10 is simply attached to the tip of the drill rod 32, compared to the drilling device 31 of FIG. Therefore, the connecting member 33A is also smaller.

  Since the drilling bit 10 of the present invention has a cylindrical shape, it is guided from the inner and outer circumferences by the remaining portion during drilling, so that the drilling straightness is good. Therefore, as in the present invention, the shape without the guide member 34 is provided. Even with the excavator 31A, the drilling can extend sufficiently straight and can be drilled without any lateral displacement.

  The drawing guide plate 23 of FIG. 6B is for drawing a shape to be drilled in advance on the surface of the drilling target in order to drill a connecting hole having a shape necessary for such a drilling device 31A. The plate 23 is provided with a plurality of guide holes 23a so as to form connection holes for H-shaped steel. In the drilling bit 10 of the present invention, the thickness of the minimum remaining portion between the drilled holes is set to about 10 mm. This is suitable for naturally crushing the remaining portion with the formed holes, but is not limited thereto.

  7A to 7D are diagrams illustrating various shapes of connection holes that can be excavated by the excavator of FIG. 2 and the excavator of FIG. 6. FIG. 7A shows a connecting hole for H-shaped steel formed by using the excavating device 31 of FIG. 2, and it can be seen that the drilling bit 10 and the guide member 34 remain in the final drilled portion. FIG. 7B shows a connecting hole for H-shaped steel formed by using the excavating apparatus 31A of FIG. 6, and it can be seen that only the drilling bit 10 is left in the final drilled portion.

  FIG. 7C shows an annular connecting hole formed by using the excavator 31 of FIG. 2, in which the drilling bit 10 and the guide member 34 are left in the final drilled portion. FIG. 7D shows an A-shaped connecting hole formed by using the excavating apparatus 31 </ b> A of FIG. 6, and only the drilling bit 10 is left in the final drilled portion.

  Thus, according to the excavator 31, 31A provided with the drilling bit 10 of the present invention, it is possible to drill a connecting hole of any shape. For example, when drilling a connecting hole for standing an H-shaped steel, only the portion along the shape can be drilled, so the amount of crushed material discharged for drilling is small, and the remaining portion should be erected. Since the shape steel is surrounded around the shape steel, the amount of concrete to be inserted between the gaps can be reduced, and the strength of the original remaining portion can be shared by the strength. Can be held.

  In addition, this invention is not limited to the said embodiment, It describes in the claim, such as the combination which is not in embodiment by the invention described in the claim, and the combination of two above-mentioned embodiments. The present invention can be freely modified and implemented within the scope described, and these are also included in the scope of the present invention.

  The drilling bit of the present invention, a drilling device and a concrete structure using the same, and a drilling method and a crushing method of rock require drilling and crushing of a concrete building containing a reinforcing bar and a rock, and in that case, noise and vibration In addition, it is possible to effectively suppress the generation of dust and the scattering of crushed materials, and in particular, the rebar portion inside the concrete structure is drilled simultaneously with the concrete portion to continuously and efficiently form groove-like connecting holes. Therefore, it is utilized in an industrial field where it is required to realize an efficient and reliable concrete structure or rock crushing.

Claims (7)

A drilling pit attached to the tip of a drill rod of a drilling device,
A cylindrical bit body,
A bit body head having an opening on the piercing side from which air or water flow for discharging the pit body is ejected;
A plurality of chip mounting seats arranged at intervals so as to be radial toward the outer periphery of the head along the opening on the perforation side of the head;
A cemented carbide tip comprising a cemented carbide body having a corner at a tip fixed to the plurality of chip mounting seats;
The cemented carbide chip is divided and arranged on the outer peripheral side and the opening side of the head, and the cemented carbide chip on the outer peripheral side of the head fits within the head of the bit body. The carbide tip on the opening side is fixed so that the lengthwise end of the opening protrudes into the opening, and the entire base other than the protruding portion fits within the head of the bit body. Drilling bit characterized in that it is made.   The chip further comprises a second cemented carbide chip fixed so that the entire base portion of the chip having a length extending in the thickness direction of the bit body head fits within the bit body head. Item 2. The drilling bit according to Item 1. A drilling rig,
A drill rod,
The drill bit according to claim 1 or 2, which is attached to a tip of the drill rod;
An excavation apparatus comprising: a guide member disposed adjacent to the drilling bit via a connecting member attached to the drill rod. A method for crushing concrete structures and rocks,
A concrete structure to be crushed using the excavator according to claim 3, a first hole is drilled at a desired depth in a desired position of a rock, and then adjacently disposed along the drilling bit via a connecting member The inserted guide member is inserted into the first hole drilled in the concrete structure and rock, so that the distance between the first hole and the first hole is kept close, and the drilling direction is restricted. While drilling a second hole using the excavator and repeating this, drilling a number of consecutive holes to form one or more free surfaces in the concrete structure, rock,
Next, the concrete structure and rock are crushed by forcibly displacing the concrete structure and rock to the one or more free sides, and the concrete structure and rock crushing method are characterized in that   A method for demolishing a building using the concrete structure and the method for crushing rocks according to claim 4. A drilling rig,
A drilling device comprising a drill rod and the drilling bit according to claim 1 attached to a tip of the drill rod. A method for drilling concrete structures and rocks,
A concrete structure to be crushed using the excavator according to claim 3, a first hole is drilled at a desired depth in a desired position of a rock, and then adjacently disposed along the drilling bit via a connecting member The inserted guide member is inserted into the first hole drilled in the concrete structure and rock, so that the distance between the first hole and the first hole is kept close, and the drilling direction is restricted. However, by drilling a second hole using the excavator and repeating this, a number of continuous holes are drilled to form one or more free-form drill grooves in the concrete structure or rock. ,
A concrete structure to be crushed and a rock are drawn in a desired shape, and a plurality of holes forming the drawn shape are brought close to each other and drilled at a desired depth using the excavator according to claim 6. Drilling one or more free-form perforations in the concrete structure, rock,
A method for drilling a rock and a concrete structure characterized by drilling by at least one of the methods.

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