JP2001088119A - Boring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the capacity for collecting cut chips dust and the like brought about on the occasion of boring and also to facilitate transfer. SOLUTION: A dust collecting device 12 is composed of a cyclone main body 51 and a dust collecting part 52. The cyclone main body 51 is composed of an almost cylindrical bellows part 61 and a cone part 62 formed in the lower part of the bellows part 61, and the bellows part 61 is composed of a cylindrical tube 61a constituted of rubber, for instance, and of a helical spring 61b embedded inside the tube 61a coaxially therewith. The spring 61b is made elastically deformable in the vertical direction. Between a core bit and the dust collecting device 12, a liquid device is connected to a discharge pipe 46. A liquid such as water, for instance, is supplied to cut chips from the liquid device so as to increase the weight of the cut chips.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling machine for drilling a work material such as asphalt or concrete using a core bit having a cutting tip at the tip of a cylindrical core.

[0002]

2. Description of the Related Art Conventionally, when drilling a work material such as asphalt or concrete, a core bit in which a cutting tip made of diamond grains or the like is fixed to the tip of an opening of a cylindrical core is used for a motor or the like. 2. Description of the Related Art For example, a drilling device disclosed in Japanese Utility Model Laid-Open Publication No. 1-106206 is known as a drilling device for punching an annular groove in a work material by pressing the work material while rotating and driving the drive source. . FIG. 4 is a sectional side view of a main part showing a punching device according to an example of the above-described conventional technology. The drilling device includes a diamond core bit 2 having a blade portion 1 at a tip, a suction type dust collecting device 3 for sucking a cutting waste and the like, and a minute water supply device 4 for supplying a small amount of mist-like cooling water to the blade portion 1. It is provided with.

At the tip of the cylindrical diamond core bit 2 which is rotated around the axis O, a plurality of blades 1,..., 1 into which diamond powder is mixed will be spaced at predetermined intervals in the circumferential direction. A rubber bellows 5 is fitted on the outer periphery of the diamond core bit 2. One end of a conduit 6 communicates with the bellows 5, and the conduit 6 penetrates the micro-water supply device 4, and
One end of a pipe 7 is open inside, and the other end of the pipe 7 is immersed in cooling water stored in the micro-water supply device 4. Through this pipe 7, the conduit 6
The suction type dust collector 3 is conveyed to the air flow 9 sucked from the outside through the hollow portion of the diamond core bit 2, the bellows 5, and the conduit 6. Is supplied to the blade portion 1. The spray water 8 supplied to the blade portion 1 is evaporated by cutting heat at the time of the drilling operation, and the temperature of the blade portion 1 is suppressed from rising due to the heat of evaporation.
Then, the suction type dust collector 3 captures and collects cutting waste and the like conveyed to the air flow 9 by a filter (not shown) provided inside.

[0004]

By the way, in the above-described punching device according to an example of the prior art, when the suction-type dust collecting device 3 collects cutting chips and the like through a filter, for example,
When a part of the spray water 8 supplied to the blade portion 1 is not evaporated and is conveyed to the air flow 9 together with the cutting waste and enters the inside of the suction type dust collector 3, the filter is clogged. There is a problem that the dust collecting ability of the suction type dust collecting device 3 is reduced. Furthermore, it is necessary to enlarge the suction-type dust collecting device 3 at the time of drilling operation in which a large amount of cutting waste is generated. When the punching operation is performed by frequently moving the punching device every time, there is a problem that the size of the suction-type dust collecting device 3 becomes large, so that it becomes difficult to move the punching device or it takes time to move. In addition, spray water 8
Is small enough to sufficiently evaporate the spray water 8 due to the heat generated by the perforation in the blade portion 1, the cutting dust flies when the suction dust collecting device 3 sucks the cutting dust. There is a problem that the particles are scattered by standing or the like. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a perforation device that can easily move while improving the dust collecting ability for collecting cutting waste and dust generated at the time of perforation.

[0005]

In order to solve the above-mentioned problems and to achieve the above object, a drilling device according to the present invention according to the first aspect of the present invention has a cutting machine for cutting a tip of a cylindrical core rotated about an axis. A core bit having a tip, a gas supply device for supplying gas to a cutting portion where the cutting tip and the work material are in contact with each other, and a dust collecting device for transporting and collecting cutting waste generated in the cutting portion by the gas Wherein the dust collecting device is a cyclone type dust collecting device, wherein a cylindrical cyclone body is formed in a bellows shape which can be elastically deformed in a central axis direction.

According to the drilling device having the above structure, the dust collecting device is a cyclone type dust collecting device. Therefore, for example, even when the volume of cutting waste is large, or when the hole formed by the drilling is large, etc. In addition, the dust collecting ability can be improved by increasing the flow rate of the gas carrying the cutting waste. In addition, since the cylindrical cyclone body is elastically deformable in the center axis direction, when the drilling operation is completed and the drilling device is moved, the dust collector is elastically deformed into a compact shape. Therefore, the labor required for moving can be reduced.

According to a second aspect of the present invention, there is provided a drilling device according to the present invention, wherein a core bit provided with a cutting tip at a tip end of a cylindrical core rotated around an axis, and the cutting tip and a work material abut. A gas supply device for supplying gas to the cutting portion, a dust collecting device for conveying and collecting the cutting waste generated in the cutting portion by the gas, and a mist for the cutting waste between the core bit and the dust collecting device. And a liquid supply device for supplying a liquid in a liquid state.

[0008] According to the drilling device having the above-described structure, the weight of the cutting waste is increased by spraying and absorbing a mist-like liquid such as water to the cutting waste containing dust and the like generated by the drilling operation. When the dust is collected by the dust device, it is possible to prevent the cutting dust from scattering due to flying or the like, and it is possible to improve the dust collecting ability of the cutting dust.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the perforating apparatus according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of a punching device 10 according to an embodiment of the present invention, FIG. 2A is a sectional side view of a main part of the punching device 10 shown in FIG. 1, and FIG. FIG. 3 is a side sectional view of the dust collecting device 12 shown in FIG. The punching device 10 according to the present embodiment includes a device main body 10a having a core bit 11,
A dust collecting device 12 for collecting cutting waste including dust, an air supply device 13 for supplying air to a cutting portion, and a mist-like liquid for cutting waste and dust between the core bit 11 and the dust collecting device 12. And a liquid supply device 15 for supplying.

As shown in FIG. 1, an apparatus main body 10a includes a base 21 fixed to a surface of a work material 20 made of concrete, asphalt, or the like, and a substantially cylindrical support fixed to the base 21 and extending in a vertical direction. A shaft 22; a support portion 23 attached to the support shaft 22 so as to be able to move up and down;
3 and a rotation driving device 24 for driving the core bit 11 to rotate. FIG.
As shown in (a) and (b), a plurality of cutting tips 3 are provided at the tip end 11a which is the open end of the cylindrical core bit 11 rotated around the axis O by the rotation driving device 24.
, 31 are brazed and fixed at predetermined intervals in the circumferential direction so as to protrude from the tip of the core bit 11, and the thickness of the cutting tip 31 in the radial direction of the core bit 11 It is formed to be thicker than the thickness, that is, the distance between the inner peripheral surface 11B and the outer peripheral surface 11A of the core bit 11. The cutting tips 31,..., 31 are formed by dispersing diamond particles, for example, in a binder phase formed by sintering a binder such as a metal bond.

A drive shaft 41 for transmitting the rotational driving force from the rotary drive device 24 to the core bit 11 is coaxially connected to the axis O on the base end side of the core bit 11. The drive shaft 41 is rotatably supported around the axis O by the support portion 23, and an annular belt receiver 42 is fitted and fixed to the outer peripheral surface of the drive shaft 41. The belt 4 is attached to the rotation shaft 24a of the
2A is mounted, and the rotational driving force of the rotational drive device 24 is transmitted to the drive shaft 41 via the belt 42A. In the drive shaft 41, a supply path 43 for supplying air from the air supply device 13 composed of, for example, an air compressor to the hollow portion of the core bit 11 is coaxial with the axis O so as to communicate with the hollow portion of the core bit 11. It is penetrated. The supply path 43 is connected to the air supply device 13 by a supply pipe 44.

A core bit 1 is provided around the core bit 11.
1. A cylindrical cover 45 having an inner diameter larger than the outer diameter of 1.
Is disposed, and a tip portion 45a, which is an opening end on the tip side of the cover 45, is in contact with the surface of the work material 20,
The base end 45b of the cover 45 closes the opening end on the base end side of the cover 45, and is formed in a substantially annular plate shape having a core bit insertion hole 45c into which the core bit 11 is inserted. Outer peripheral surface 1 of core bit 11
1A and an annular groove 20a formed in the work material 20 are covered to prevent scattering of cutting waste including dust and the like generated at the time of drilling, and to reduce noise leakage at the time of drilling. I have. In addition, on the outer peripheral surface of the cover 45, air containing cutting waste discharged from the groove 20 a of the work material 20 from the hollow portion of the core bit 11 through a cutting portion near the cutting tip 31 to the dust collector 12. And a discharge pipe 46 for discharging.

As shown in FIG. 3, the dust collecting device 12 forms a cyclone type dust collecting device, and is connected to a cyclone main body 51 and a lower portion of the cyclone main body 51.
A dust collecting section 52 is provided for collecting cutting debris including dust separated from air in the cyclone main body 51 and the like. The cyclone body 51 has a substantially cylindrical bellows portion 6.
1 and a cone 62 formed below the bellows 61
An air flow β including cutting waste discharged from the groove 20 a of the work material 20 in the cyclone body 51 by the discharge pipe 46 connected on the outer peripheral surface of the bellows portion 61.
A substantially disk-shaped lid 63 is formed at the upper end of the bellows portion 61 so as to close the upper open end, and the lid 63 is provided with gas from inside the cyclone body 51. A gas discharge pipe 64 for discharging only the gas is provided. The bellows portion 61 includes a cylindrical tube 61a made of, for example, rubber or the like, and a spiral spring 61 embedded inside the tube 61a coaxially with the tube 61a.
b. The spring 61b is elastically deformable in the vertical direction (vertical direction in FIG. 3), and the length of the cyclone body 51 in the vertical direction is adjustable.

One end of a liquid supply pipe 71 is connected to the discharge pipe 46 between the cover 45 of the core bit 11 and the dust collector 12, and the other end of the liquid supply pipe 71 is stored in the liquid apparatus 15. For example, immersed in a liquid such as water. Then, the liquid device 15 is supplied through the liquid supply pipe 71.
The spray water 72 is sprayed into the discharge pipe 46 from above, and the spray water 72 is absorbed by the cutting waste including dust and the like to increase the weight of the cutting waste.

The drilling device 10 according to the present embodiment has the above-described configuration. Next, the operation of the drilling device 10 will be described with reference to the accompanying drawings. First, the rotation driving device 2
4 from the drive shaft 41 via the belt 42A.
And the core bit 11 is rotated about the axis O. In this state, when the support portion 23 is lowered with respect to the support shaft 22, the cutting tip 31 fixed to the tip portion 11a of the core bit 11 is pressed by the work material 20, and the groove 2 is formed in an annular shape.
0a is perforated. At this time, for example, compressed air is supplied from the air supply device 13 to the supply pipe 44, and when the air flow α flows from the supply pipe 44 into the hollow portion of the core bit 11 through the supply path 43 of the drive shaft 41, the air Flow α is work material 2
It is sprayed so as to press the surface of 0. Thereafter, the air flow α is applied to the inner peripheral surface 11B of the core bit 11 and the groove 2.
The core bit 11 is fed into the tip of the core bit 11, that is, the vicinity of the cutting tip 31, through the gap between the inner bit 20 a and the inner peripheral wall 20 </ b> A.

Next, an air flow β including cutting waste generated at a cutting portion where the cutting tip 31 and the work material 20 come into contact with each other,
It is discharged from the opening of the groove 20a into a space surrounded by the outer peripheral surface 11A of the core bit 11 and the cover 45. Air flow β
Is sprayed from the liquid device 15 through the liquid supply pipe 71 connected to the discharge pipe 46, and the spray water 72 is absorbed by the cutting waste contained in the air flow β. The weight of the shavings is increased. Then, the air flow β taken into the dust collecting device 12 through the discharge pipe 46 is
The fluid is caused to flow in a swirl along the inner peripheral surface inside the cyclone body 51. Here, only the cutting waste gradually moves downward in the vertical direction due to gravity,
The air flow β is separated into air and cutting waste that has absorbed the spray water 72 and has increased in weight. The air is discharged from the gas discharge pipe 64, and the cutting waste is collected in the dust collecting section 52. When the drilling of the groove 20 having a desired depth is completed, the supply of the compressed air from the air supply device 13 is continuously performed, and the support portion 23 is raised with respect to the support shaft 22 in this state. By doing so, the core bit 11 is pulled out from the groove 20a.
In this case, since the air flow α is blown from the supply path 43 of the drive shaft 41 so as to press the surface of the work material 20, the work material 20 is surrounded by the annular groove 20a.
For example, the root portion 20 of the cylindrical core portion 20b formed at
Even if a cut occurs in c or the like, the core portion 20b is prevented from being fitted into the core bit 11 and pulled out together with the core bit 11.

According to the drilling apparatus 10 of the present embodiment, even when the volume of the cutting waste is large or the groove 20a formed by the drilling is large, the flow rate of the air for transporting the cutting waste is increased. The dust collector 12
Can improve the dust collecting ability. In addition, since the bellows portion 61 of the cylindrical cyclone body 51 can be elastically deformed in the vertical direction, when the drilling operation is completed and the drilling device is moved, the dust collecting device 12 has a compact shape. By performing the elastic deformation, the labor required for the movement can be reduced. Further, the cutting waste including dust and the like generated by the drilling work can be increased in weight by absorbing the spray water 72 supplied from the liquid supply device 15. At the time of collection, it is possible to prevent the cutting waste from scattering due to flying or the like, and to improve the dust collecting ability of the cutting waste.

In the present embodiment, the gas supply device 13 and the core bit 11 are connected by the supply pipe 44. However, the present invention is not limited to this. Cutting tip 31 and work material 20
A coolant supply device for supplying a coolant made of, for example, water, oil, or the like, for cooling a cutting portion in contact with the coolant may be provided.

[0019]

As described above, according to the drilling device of the first aspect of the present invention, since the dust collecting device is a cyclone type dust collecting device, for example, when the volume of cutting waste is large. Also, even in the case where the hole formed by drilling is large, the dust collecting ability can be improved by increasing the flow rate of the gas that conveys the cutting waste. Moreover, since the cylindrical cyclone body is elastically deformable in the vertical direction, when the drilling operation is completed and the drilling device is moved, the dust collector is elastically deformed into a compact shape. The labor required for movement can be reduced. Further, according to the drilling device of the present invention as set forth in claim 2, dust is collected by increasing the weight of the cutting debris by absorbing liquid such as water into the cutting debris including dust generated by the drilling operation. When collected by the device, it is possible to prevent the cutting waste from scattering due to flying or the like.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a punching device according to an embodiment of the present invention.

2 (a) is a sectional side view of a main part of the drilling device shown in FIG. 1, and FIG. 2 (b) is a perspective view showing a part of a core bit of the drilling device in a cutaway manner.

FIG. 3 is a side sectional view of the dust collecting apparatus shown in FIG.

FIG. 4 is a side sectional view showing a main part of a punching device according to an example of the related art.

[Explanation of symbols]

 Reference Signs List 10 drilling device 11 core bit 12 dust collector 13 air supply device (gas supply device) 15 liquid supply device 31 cutting tip 51 cyclone body 52 dust collector 61 bellows

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Go Tsuyoshi Kawahara 686-1, Saedo-cho, Tsuzuki-ku, Yokohama-shi, Kanagawa Japan F-term (reference) 2D065 CA02 CA06 CA07 3C069 AA04 BA09 BB01 CA09 DA01 DA06 DA07 EA01

Claims (2)

[Claims] 1. A core bit provided with a cutting tip at a tip of a cylindrical core rotated around an axis, a gas supply device for supplying gas to a cutting portion where the cutting tip contacts a work material, In a perforation device comprising: a dust collecting device that conveys and collects cutting waste generated in a cutting part by the gas, wherein the dust collecting device is a cyclone type dust collecting device, and a cylindrical cyclone main body extends in a central axis direction. A perforation device characterized by being formed in an elastically deformable bellows shape. 2. A core bit provided with a cutting tip at a tip of a cylindrical core rotated around an axis, a gas supply device for supplying gas to a cutting portion where the cutting tip contacts a work material, A dust collecting device that conveys and collects cutting waste generated in a cutting part by the gas, and a liquid supply device that supplies mist-like liquid to the cutting waste between the core bit and the dust collecting device. A perforation apparatus characterized by the above-mentioned.