JP2017052211A - Eccentric-type perforating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an eccentric-type perforating apparatus designed to facilitate removal of cut residue in a perforation spindle without removing the perforation spindle from a main body of the apparatus and to handle a depth of a hole to bore without removing the perforation spindle from the main body of the apparatus and changing it.SOLUTION: An eccentric-type perforating apparatus comprising a device main body 10 having a built-in drive motor and a boring bit 16 in the tip 15a has: a perforation spindle 15 consisting of a hollow body with an opened rear end 15b; holding means 20 attached to the device main body 10 and configured to hold the perforation spindle 15 rotatably with eccentricity with respect to an output shaft of the drive motor in the device main body 10; and rotation transmission means for transmitting rotary motion from the output shaft of the drive motor in the device main body 10 to the perforation spindle 15.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an eccentric drilling device for drilling a material layer having high hardness such as concrete.

  2. Description of the Related Art Conventionally, a perforating apparatus that perforates a material layer with high hardness such as concrete by rotating a perforating spindle having a drilling blade attached to the tip of a hollow body with an electric motor is known. In such a known drilling device, as shown in FIG. 5, usually, a drilling spindle C is concentrically connected to an output shaft B of a drive motor A such as an electric motor or a fluid force motor, and drilling is performed during a drilling operation. Since the spindle C is exposed to high temperature due to frictional heat, the cooling water is continuously or intermittently supplied to the excavating blade attached to the tip of the drilling spindle C during the drilling operation.

  In such a drilling device, as the drilling operation proceeds, the shavings accumulate inside the drilling spindle and become clogged, so the drilling spindle must be periodically removed from the drilling device to remove the shavings jammed inside, Inefficiency was a problem in terms of workability.

  In order to solve this problem, a suction device communicating with the inside of the drilling spindle is provided to suck out the shavings from the inside of the drilling spindle, or a pressurized fluid is injected into the drilling spindle to flush away the shavings accumulated in the drilling spindle. Means have also been proposed. However, this kind of shavings removal means becomes large in equipment, which is not only costly but cannot be used depending on the environment where the drilling work will be performed, and avoids clogging of shavings completely. Is also practically difficult.

  When the depth of the hole to be drilled is deep, the drilling spindle is replaced with a longer one, or the drilling spindle is added. In such a method of directly attaching to the output shaft of the drive motor for such replacement work or addition work, it is necessary to firmly attach to the output shaft of the drive motor to withstand the reaction force during drilling. The transfer work is extremely difficult. On the other hand, as the depth of the hole to be drilled becomes deeper, the amount of shavings clogged in the drilling spindle increases, so that the removal takes time. In particular, at work sites where workers are unable to approach or have limited time to work continuously, removal of shavings in the drilling spindle accompanying drilling operations must be performed at a location remote from such work site. Compared with the time required for drilling, the other work time becomes longer, which hinders efficient work.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an eccentric drilling device configured so that shavings in a drilling spindle can be easily removed without removing the drilling spindle from the apparatus main body.

  Another object of the present invention is to provide an eccentric drilling device configured to be able to cope with the depth of the hole to be drilled without removing the drilling spindle from the apparatus main body and replacing it.

The object is according to the invention,
A device body with a built-in drive motor;
A drilling spindle comprising a hollow body with a drilling blade at the tip and an open rear end;
A gripping means attached to the apparatus body and configured to grip the drilling spindle so as to be eccentric with respect to the output shaft of the drive motor in the apparatus body;
This is achieved by an eccentric drilling device comprising rotation transmitting means for transmitting rotational motion from an output shaft of a drive motor in the device main body to a drilling spindle.

  The eccentric drilling device according to the invention may further comprise means for supplying or sucking fluid from the rear end of the drilling spindle.

  According to an embodiment of the present invention, the fluid supplied from the rear end of the drilling spindle can be pressurized air. Alternatively, the fluid supplied from the rear end of the drilling spindle can be a pressurized liquid.

  According to another embodiment of the invention, the means for supplying or sucking fluid from the rear end of the drilling spindle preferably comprises an exhaust pump and can be configured to maintain a negative pressure in the drilling spindle.

  According to a preferred embodiment of the present invention, the output shaft of the drive motor in the apparatus body and the axis of the drilling spindle can be spaced apart from each other in parallel. In this case, the rotation transmission means can be composed of a drive gear fixed to the output shaft of the drive motor in the apparatus main body, and a driven gear that is provided concentrically with the drilling spindle in the gripping means and meshes with the drive gear.

According to another embodiment of the invention, the output shaft of the drive motor in the apparatus body and the axis of the drilling spindle can be provided at an angle to each other.
In this case, the rotation transmission means may be a helical gear.

  According to one embodiment of the present invention, in the eccentric drilling device, the gripping means may be configured to grip the drilling spindle movably along its axial direction.

  In the eccentric drilling device according to the present invention, a drilling spindle comprising a hollow body having a drilling blade at the front end and an open rear end is provided eccentrically with respect to the output shaft of the drive motor in the device body by the gripping means. Therefore, the shavings accumulated inside can be removed without removing the drilling spindle, and a series of operations from drilling to cleaning the drilling spindle can be performed efficiently.

  In the eccentric drilling apparatus according to the present invention, when a means for supplying or sucking fluid from the rear end of the drilling spindle is provided, the shavings in the drilling spindle are washed simultaneously with the drilling operation together with cooling of the drilling spindle. The efficiency of work can be dramatically improved. This not only increases the cooling efficiency of the drilling blade provided at the tip of the drilling spindle and greatly extends the service life, but also draws fluid or air from the rear end of the drilling spindle, creating a negative pressure inside the drilling spindle. When configured to maintain, the cooling efficiency of the excavating blade during excavation can be improved, and the scattering of dust during excavation can be greatly reduced, which helps to improve the environment of the work site.

  In the eccentric drilling device according to the present invention, when the drilling spindle is configured to be movably gripped along the axial direction by the gripping means, it is not necessary to remove or replace the drilling spindle from the device main body. It is possible to adapt to the depth of the hole to be drilled by simply changing the mounting position of the drilling spindle according to the depth of the hole to be drilled, thereby substantially improving the adaptability of the device, Contributes to improved workability.

  Further, when the output shaft of the drive motor in the apparatus main body and the axis of the drilling spindle are provided at an angle, the hole axis is drilled at a certain angle with respect to the base material to be drilled. Can do.

  Further, in the eccentric drilling apparatus according to the present invention, when the drilling spindle is gripped by the gripping means so as to be movable along the axial direction, the drilling spindle is attached according to the depth of the hole to be drilled. It is possible to adapt to the depth of the hole to be drilled by simply changing the position, thereby improving the adaptability of the device.

  Other features and advantages of the present invention will be apparent from the drawings and detailed description of the illustrated embodiments.

The principle figure which shows the punching apparatus of this invention. Schematic which shows one Embodiment of this invention. FIG. 3 is an enlarged longitudinal sectional view showing the internal structure of the gripping means of the drilling spindle shown in FIG. 2. Schematic which shows another embodiment of this invention comprised so that the holding position of a drilling spindle could be changed according to the depth of the hole which should be drilled. The principle figure which shows the conventional coaxial drilling apparatus.

  FIG. 1 shows a principle diagram of a perforating apparatus according to the present invention. Reference numeral 1 denotes a drive motor provided in an apparatus main body (not shown). A drive gear 3 is attached to an output shaft 2 of the drive motor. Yes. Reference numeral 4 denotes a driven gear that meshes with a drive gear 3 attached to an output shaft 2 of the drive motor 1, and these gears rotate to transmit rotational motion from the output shaft 2 of the drive motor 1 in the apparatus main body to the hollow drilling spindle 5. It constitutes a transmission means. Both ends of the hollow drilling spindle 5 are open, and a fluid such as cooling water or cooling air is supplied from the rear end to the front end of the hollow drilling spindle 5 as indicated by an arrow. A drilling blade (not shown) is attached to the tip of the hollow drilling spindle 5, and the hollow drilling spindle 5 itself is made of a steel material such as stainless steel. In operation, the hollow drilling spindle 5 is driven to rotate from the output shaft 2 through the drive gear 3 and the driven gear 4 by driving the drive motor 1, and the excavating blade provided at the tip of the spindle is, for example, drilled into concrete. Has been.

Next, an embodiment of the present invention will be described with reference to FIGS.
In FIG. 2, reference numeral 10 denotes an apparatus main body of the punching apparatus. The apparatus main body 10 includes a main body casing 11, a handle 12 provided on the upper surface of the main body casing 11, a trigger switch 13 provided on the handle 12, And a drive motor (not shown, but the output shaft of the drive motor is indicated by 14 in FIG. 3). In FIG. 2, reference numeral 15 denotes a hollow cylindrical drilling spindle. The drilling spindle 15 is open at both ends, and a diamond cutter 16 is fixed to the tip 15a. The rear end 15b is fixed to a chuck 21 of the gripping means 20 described later.
Further, in FIG. 2, reference numeral 17 denotes a fluid supply means. The fluid supply means 17 has one end 17 a connected to the fluid supply source 17 b and the other end 17 c fixed to the chuck 25 of the gripping means 20. The
Thereby, the fluid supply source 17 b is connected to the hollow cylindrical drilling spindle 15 via the fluid supply means 17 and the gripping means 20, and is configured to be able to supply fluid into the drilling spindle 15.
As the fluid, water or air under pressure can be selected according to the working environment.

  The fluid supply means 17 can also be implemented as a fluid suction means connected to an exhaust pump instead of the fluid supply source 17b. Thereby, it can be configured to maintain a negative pressure in the drilling spindle 15. That is, the atmosphere is sucked into the drilling spindle 15 along the inner wall of the hole being drilled and the diamond cutter 16 at the tip of the drilling spindle 15, whereby the diamond cutter 16 is cooled and dust generated in the drilling spindle 15 is removed during drilling. It is possible to substantially reduce the amount of clogging and clogging or dust scattering around the suction and drilling spindle 15. This is particularly useful in a working environment in which cooling water cannot be used (for example, an environment in which electronic equipment is provided) or a working environment in which dust scattering is to be suppressed as much as possible (for example, a nuclear facility).

  Reference numeral 20 denotes a gripping means for the drilling spindle 15 fixed to the apparatus body 10, and includes a chuck 21 for gripping the drilling spindle 15 and a chuck 25 for gripping the fluid supply means 17.

As shown in FIG. 3, the gripping means 20 covers the output shaft 14 of the drive motor, and is fixed to a mounting member 22 integrally fixed to the main body casing 11 via a bearing device 23. That is, the gripping means 20 has a cylindrical holding member 24 that communicates with the drilling spindle 15 fixed by the chuck 21, and a drive gear mounted on the output shaft 14 of the drive motor on the outer periphery of the cylindrical holding member 24. A driven gear 27 that meshes with 26 is fixed and is rotated by the power of the output shaft 14.
The chuck 21 is fixed to the cylindrical holding means 24, whereby the drilling spindle 15 fixed to the chuck 21 rotates together with the cylindrical holding means 24.
The gripping means 20 further includes a chuck 25, and the chuck 25 fixes the fluid supply means 17 rotatably. Thereby, the fluid supply means 17 fixed to the chuck 25 communicates with the cylindrical holding means 24 but does not rotate.
According to the drilling apparatus configured as described above, the drilling spindle 15 is provided eccentrically with respect to the output shaft 14 of the drive motor provided in the apparatus body 10, and the gripping means 20 for gripping the drilling spindle 15 is provided. A cylindrical holding member 24 is provided, and the fluid supply means or the fluid suction means and the inside of the drilling spindle 15 communicate with each other through the cylindrical holding member 24. As a result, fluid can be supplied into the drilling spindle or fluid can be sucked from the drilling spindle, and the drilling spindle 15 can be efficiently cooled.

FIG. 4 shows another embodiment of the present invention.
In the embodiment shown in FIGS. 1 to 3, the gripping means 20 includes a cylindrical holding member 24, and one end of the drilling spindle 15 is fixed by a chuck 21 fixed to the cylindrical holding member 24. In the example, the gripping means 30 is configured not to fix one end of the drilling spindle 31 but to grip the longitudinal intermediate part of the drilling spindle 31.
Therefore, as shown in FIG. 4, the drilling spindle 31 penetrates the gripping means 30, and the gripping means 30 grips an arbitrary intermediate portion of the drilling spindle 31.
The drilling spindle 31 is movable in the axial direction with respect to the gripping means 30, but is fixed in the rotational direction and the power of the drive motor 1 is transmitted via a gear (not shown). The gripping means 30 moves the drilling spindle 31 in the axial direction according to the depth of the hole to be drilled, and grips it at an appropriate position. In this gripping state, the drilling spindle 31 is also fixed in the axial direction.
4 (a) to 4 (d) show an embodiment in which a deep hole is drilled. As shown in the drawing, first, a gripping means 30 grips a substantially intermediate portion of the drilling spindle 31 (see FIG. 4). 4 (a)), drilling is started (FIG. 4 (b)), and when the drilling is performed to a predetermined depth, the gripping means 30 is moved upward in the longitudinal direction with respect to the drilling spindle 30 without pulling the drilling spindle 31 out of the hole. (FIG. 4 (c)), after gripping at that position, drilling is started again to drill to a predetermined depth (FIG. 4 (d)).
When drilling deep holes, drilling with a long drilling spindle from the beginning may cause the holes to bend or damage the drilling spindle itself. And was perforated. Specifically, after first drilling with a short drilling spindle, the drilling spindle is pulled out of the hole and replaced with a long drilling spindle, and then the drilling spindle is inserted again into the extracted hole to drill deeper. It was.
According to the present embodiment, even when drilling a deep hole, it is not necessary to replace the drilling spindle in the middle, and naturally, it is not necessary to pull out the drilling spindle from the hole in the middle, so drilling work is extremely easy. become.
In addition, the punching device according to the present embodiment forms the frame so that the punching device can be moved in the XYZ directions at the work place to be punched, for example, so that the gripping means 30 can be moved easily and accurately and easily. Can be perforated.
In the above-described embodiment, the drilling spindle 31 may be preferably formed of a cylindrical body having both ends open, and fluid can be supplied into the spindle from the upper end of the drilling spindle 31, and from the state of the drilling spindle 31. It may be configured to be able to aspirate fluid in the spindle.

  In the illustrated embodiment, the drilling spindles 15 and 31 are offset and parallel to the output shaft 14 of the drive motor, but instead a helical bevel gear is used to drive the drilling spindles 15 and 31. It is also possible to configure with an angle by being offset with respect to the output shaft 14 of the motor. In that case, the angle may be configured to be arbitrarily set according to the drilling angle.

  In the illustrated embodiment, a single drilling spindle is used. Of course, if the depth of the hole to be drilled is deep, a plurality of drilling spindles may be connected and used. It is.

  The present invention has been described above with reference to one specific embodiment, but the present invention is not limited to this embodiment. It will be apparent to those skilled in the art that other embodiments are possible without departing from the scope of the invention as defined in the claims.

DESCRIPTION OF SYMBOLS 1 Drive motor 2 Output shaft 3 Drive gear 4 Driven gear 5 Drilling spindle

DESCRIPTION OF SYMBOLS 10 Punching device 11 Casing 12 Handle 13 Trigger switch 14 Output shaft 15 Hollow drilling spindle 15a Front end 15b Rear end 16 Diamond cutter 17 Fluid supply means 17a One end 17b Fluid supply source 17c Other end 20 Holding means 21 Chuck 22 Mounting member 23 Bearing device 24 Cylindrical holding member 25 Chuck 26 Drive gear 27 Driven gear

30 Grasping means 31 Drilling spindle

Claims (9)

An apparatus body (10) incorporating a drive motor (1);
A drilling spindle (15; 31) comprising a hollow body provided with a drilling blade (16) at the front end (15a) and opened at the rear end (15b);
A grip attached to the apparatus main body (10) and configured to be eccentric with respect to the output shaft (14) of the drive motor (1) in the apparatus main body (10) and rotatably grip the drilling spindle (15; 31). Means (20);
An eccentric type comprising rotation transmission means (26, 27) for transmitting rotational movement from the output shaft (14) of the drive motor (1) in the apparatus body (10) to the drilling spindle (15; 31). Drilling device. 2. An eccentric drilling device according to claim 1, further comprising means (17) for supplying or sucking fluid from the rear end (15b) of the drilling spindle (15; 31). The means (17) for supplying or sucking fluid from the rear end (15b) of the drilling spindle (15; 31) is provided with an exhaust pump and is configured to maintain a negative pressure in the drilling spindle (15; 31). The eccentric punching device according to claim 2, wherein The output shaft (14) of the drive motor (1) in the apparatus main body (10) and the axis of the drilling spindle (15; 31) extend in parallel with each other. An eccentric punching device according to any one of the preceding claims. A rotation transmission means is provided on the drive gear (26) fixed to the output shaft (14) of the drive motor in the apparatus body (10), and the gripping means (20) is provided concentrically with the drilling spindle (15; 31). The eccentric drilling device according to any one of claims 1 to 4, comprising a driven gear (27) meshing with the gear (26). The output shaft (14) of the drive motor in the apparatus body (10) and the axis of the drilling spindle (15; 31) are provided at an angle to each other. The eccentric punching device according to one item. The eccentric punching device according to claim 6, wherein the rotation transmitting means is a helical gear. 8. The angle between the output shaft (14) of the drive motor (1) in the apparatus main body (10) and the axis of the drilling spindle (15; 31) can be adjusted. The eccentric punching device according to any one of the above. The eccentric punching device according to any one of claims 1 to 8, wherein the gripping means (20) grips the drilling spindle (15; 31) so as to be movable along the axial direction thereof.

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