JP2001277235A - Corner grooving method and corner grooving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide a groove on a corner section of an article to be carved. SOLUTION: This grooving device 1 is equipped with a rotating shaft on the tip end of which a bit 5 is fitted, rotors which are fixed to the same shaft to each other, and a stator which constitutes a direct motor together with the rotors. By using such a grooving device, a vertical slit and a horizontal slit are respectively formed on a corner section d of a concrete wall by the bit 5 which rotates together with the rotating shaft by the driving of the direct motor. Therefore, slits can be easily and surely formed on corner sections wherein slits cannot be formed by a cutter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corner groove forming method for forming a groove in a corner portion of an object to be cut and a processing apparatus for implementing the method.

[0002]

2. Description of the Related Art Recently, in the case of a relatively large building such as a school or a hospital, as shown in FIG. It has been practiced to suppress the transmission of vibration during an earthquake and prevent collapse. When a slit c is formed in the wall b and the edge is cut off, a cutter a as shown in FIG. 7 is used.

[0003]

However, when the slit c is provided in the wall b, there is no problem when the slit c does not interfere with the cutter a around the wall b. For example, especially near the ceiling or the floor, as shown in FIG. The portion where the slit c is provided may become particularly the corner d. Therefore, there is a problem that uncut portions that cannot be cut occur at the corners d.

The present invention has been made in view of the above-mentioned problems of the prior art,
An object of the present invention is to provide a corner groove processing method and a processing apparatus capable of easily providing a groove in a corner portion of a workpiece.

[0005]

Means for Solving the Problems To solve the above problems, the present invention employs the following means.

According to a first aspect of the present invention, there is provided a corner groove machining method for forming a slit in an object to be cut, wherein a stator is provided on an outer periphery of a cylindrical rotor, and a rotary shaft is inserted through the rotor to be integrated therewith. Using a machining device having a directly fixed direct motor and a bit attached to the rotary shaft of the direct motor, the bit being rotated together with the rotary shaft by the drive of the direct motor, the corner is formed at the corner of the concrete wall. The slit is formed so as to reach the inner part of the part.

According to the present invention, as described above, a slit is formed in a corner portion of a concrete wall by using a bit rotating with a rotating shaft by driving a direct motor using the processing device. Therefore, a slit can be easily and reliably provided in a portion which cannot be formed by a cutter as in the related art. In addition, by using the processing device of the direct motor, the size and weight can be reduced, and vibration and noise can be reduced as much as possible.

A corner groove machining method according to a second aspect is characterized in that, in the corner groove machining method according to the first aspect, a diamond bit having diamond abrasive grains fixed to a peripheral surface thereof via a binder is used as the bit. I have.

As described above, since the tool for providing the slit is made of diamond abrasive grains, the slit can be easily provided not only in concrete but also in other objects, and furthermore, it is possible to make a hole. Become.

According to a third aspect of the present invention, there is provided a corner groove machining apparatus, wherein a stator is provided on an outer periphery of a cylindrical rotor, and a rotary shaft is inserted through the rotor and integrally fixed, and a rotation of the direct motor is provided. A bit attached to the tip of the shaft, wherein the bit has diamond abrasive grains fixed to the peripheral surface thereof via a binder.

According to the present invention, as described above, a direct motor as a drive source, a rotary shaft inserted through a rotor of the direct motor and fixed coaxially with the rotor,
Since the machining device is configured to include the bit attached to the tip of the rotating shaft, the method of claim 1 can be accurately performed. Moreover, since the bit fixes the diamond abrasive grains to the peripheral surface via the binder, the method of claim 2 can be carried out accurately.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 1 and 2,
Reference numeral 1 denotes a processing device, and reference numeral 2 denotes a direct motor (drive source) included in the processing device 1. The processing apparatus 1 is used by an operator to cut a slit or the like at an arbitrary position by hand.

The direct motor 2 has a cylindrical rotating shaft 3 at the center thereof, and the tip of the rotating shaft 3 has
A bit 5 is detachably attached via an adapter 4. The bit 5 has a diamond bit 7 integrally provided on an outer peripheral surface of a tube 6 formed in a hollow shape. That is, the direct motor 2 is a direct type motor that directly rotates the bit 5 which is a tool directly connected to the rotating shaft 3.

Diamond bit 7 constituting bit 5
Are provided on the outer peripheral surface of the tube 6 by a binder such as a metal bond or a resin bond. As shown in FIG. Grooves and holes of a degree (about 30 mm in this example) can be formed. Further, the upper end side of the tube 6 integrally provided with such a diamond bit 7 communicates with the rotating shaft 3 and the distal end is closed.

The rotary shaft 3 is inserted into a housing 8 in which the direct motor 2 is built.
A rotor 9 is provided integrally with the rotor 9 and a cylindrical stator 10 fixed to an outer peripheral position of the rotor 9 is provided. In this example, as shown in FIG. 4, the stator 10 includes magnets M arranged at intervals along the circumferential direction.
And a yoke Y provided between the magnets M to support the magnets M at predetermined positions.

A front end portion and a rear end portion of the housing 8 in the axial direction are closed by a front wall portion 8a and a rear wall portion 8b, and are provided on both sides of the front wall portion 8a, the rear wall portion 8b, and the rotary shaft 3. Bearings 11a and 11b for rotatably supporting the rotor 9 are interposed between the provided flanges 3a and 3b, respectively. That is, the bearings 11a and 11b support both ends of the rotating shaft 3 inserted into the center of the rotor 9, and a thrust direction acting on the rotating shaft 3 and the rotor 9 inserted through the rotating shaft 3. And a radial force. The flanges 3a and 3b are
Is provided on the outer periphery of the middle part accommodated in the housing 8.

On the other hand, the other end of the direct motor 2
A rotary joint 12 is attached. The rotary joint 12 is attached to a rear wall portion 8 b of the housing 8, and is rotatably connected to the rotating shaft 3 in a liquid-tight state.

The rotary joint 12 has a passage 13 communicating with the through hole 3c at the center of the rotating shaft 3. The flow path 13 is opened on the side of the rotary joint 12. As shown in FIG. 1, a pipe 15 made of, for example, a tube is connected to the opening 14 opened to the side, so that cooling water is sent through the pipe 15 from a supply source (not shown).

The cooling water sent from the pipe 15 to the flow path 13 of the rotary joint 12 is guided to the through hole 3c of the rotary shaft 3 through the flow path 13 of the rotary joint 12, and thereafter, the rotation water 3 is fed into the tube 6 of the bit 5 mounted on the tip side of the
By being sent out through a hole 6 a provided in the tube 6, the portion cut by the bit 5 can be cooled and lubricated.

Further, a cooling fan 16 is mounted on the rotating shaft 3 of the direct motor 2. The cooling fan 16 includes a bearing 11 a in the housing 8 on the rotating shaft 3.
It is mounted on the peripheral side between the motor and the direct motor 2. When the cooling fan 16 rotates together with the rotation of the rotating shaft 3, air is drawn into the housing 8 from an intake port 17 formed on the tip side of the housing 8, and the air flows through the direct motor 2. Through the gap between the stator 10 and the rotor 9, the space between the magnet M of the stator 10 and the yoke Y and the housing 8,
Thereafter, the exhaust port 1 formed in the rear wall 8b of the housing 8
The inside of the housing 8 can be cooled as a whole by being exhausted from the outside. Therefore, as shown in FIG. 1, the housing 8 is provided with a plurality of intake ports 17 on the outer peripheral surface on the distal end side thereof,
Is provided with an exhaust port 18 as shown in FIG.

Further, a brush portion 19 is provided at a position near the other end in the housing 8. The brush section 19 supplies a drive current to the direct motor 2 from here. The magnet M of the stator 10 is made of a neodymium, iron, boron-based or samarium-cobalt-based rare earth element having a much higher maximum magnetic energy product than a commonly used ferrite magnet or alnico magnet. It is preferable to use a density magnet.

Further, the direct motor 2 having the rotor 9 and the stator 10 may be a brush motor or a brushless motor. In the above example, the magnet M is provided on the stator 10 side and the rotor 9 is a coil. However, the stator 10 side may be a coil and the magnet may be provided on the rotor 9 side, or both may be coils. .

Since the processing apparatus of the present embodiment has the above-described configuration, a case where a groove is formed in a concrete wall which is an object to be cut using the processing apparatus will be described below. First,
When a slit is to be provided on a concrete wall, if the location is near the ceiling or floor, the corner d
Therefore, as described above, the slit cannot be provided in the ordinary cutter as shown in FIG.

At this time, the worker uses the processing apparatus 1 of the present embodiment, and forms a slit at the corner d by the bit 5 of the processing apparatus 1. That is, as shown in FIG. 5 (a), the operator previously arranges the bit 5 of the processing device 1 so that the bit 5 faces upward with respect to a portion to be processed at the corner d, and in this state, the processing is performed. When the direct motor 2 of the apparatus 1 is turned on, the rotor 9 (or the stator 1) is turned on.
When the coil 9) is energized, the rotor 9 is driven, and the rotating shaft 3 and the bit 5 are rotated, so that the bit 5 raises the cutting part gradually from below as shown by the arrow. Then, the corner d is cut until the tip of the bit 5 reaches just below the corner d, as shown in FIG.

At this time, cooling water is fed into the processing apparatus 1 from the pipe 15 into the flow path 3c of the rotating shaft 3 by a supply source (not shown), and the hole 6a provided in the tube 6 of the bit 5
, Cooling water is supplied, and the portion cut by the bit 5 is cooled and lubricated.

Thus, the corner d to be cut
After forming a slit from just below to below, the operator then puts the bit 5 at the corner d as shown in FIG. 5 (c).
It moves horizontally from just below the top plate to cut. As described above, by forming the vertical slits and the horizontal slits, the slits can be easily and reliably provided in the deep portion of the corner portion d.

That is, in the method of the present invention, a processing apparatus having a rotating shaft 3 having a bit 5 attached to a tip end thereof, a rotor 9 coaxially fixed to each other, and a stator 10 constituting a direct motor 2 together with the rotor. 1, a vertical slit and a horizontal slit can be respectively formed in the corner d of the concrete wall by the bit 5 which rotates together with the rotating shaft 3 by driving of the direct motor 2. A slit can be easily and reliably provided in a portion that cannot be formed by the above method.

Moreover, since the diamond bit 7 is used as the bit 5, slits can be easily formed not only in concrete but also in other materials, and furthermore, it is possible to make a hole.

Further, since the processing apparatus 1 has a direct motor structure and does not have a power transmission mechanism, the processing apparatus 1 can be reduced in size and weight, and can be driven at a high speed even when reduced in size and weight. , Can exert sufficient power. In addition, vibration during driving can be reduced,
In addition, noise can be reduced. In the present embodiment, it has been confirmed that it can be reduced to 70 dB or less. In particular, in the case of construction in a hospital, if the vibration or noise is large, there is a possibility that the patient etc. in the building may be adversely affected, but as described above, the vibration and noise can be reduced as much as possible,
The adverse effects can be eliminated.

As described above, the processing apparatus 1 of the present embodiment
A bit 5 having a direct motor 2 as a drive source, and having a rotary shaft 3 fixed coaxially with a rotor 9 of the direct motor 2, and a diamond bit 7 provided on the distal end of the rotary shaft 3 on the peripheral surface. Is mounted so that a slit can be formed at the corner d of the concrete wall by the bit 5, so that the above method can be performed accurately.

In this embodiment, an example is shown in which the present invention is applied to a case where a slit is provided in a concrete wall. However, the same effect can be obtained by applying the present invention to a material made of other materials. In addition, it can be used for drilling and the like, and therefore can be used for various things as appropriate according to the usage of the user, and has versatility as a tool. In the above example, if the direct motor 2 can be sufficiently cooled by the cooling water passing through the rotating shaft 3, the cooling fan 16 is omitted as the direct motor 2, and the intake port 17 and the exhaust port 18 are further provided. It is good also as a closed type which lost the. In this manner, the direct motor 2 can be provided without any trouble such that dust and cooling water enter the inside.

[0032]

As described above, according to the corner groove processing method and processing apparatus of the present invention, the following effects can be obtained. According to the corner groove machining method of the present invention, a slit is formed at the corner of the concrete wall by the bit rotating with the rotating shaft by the driving of the direct motor using the machining apparatus. Therefore, a slit can be easily and reliably provided in a portion which cannot be formed by a cutter as in the prior art. In addition, by using the processing device of the direct motor, the size and weight can be reduced, and vibration and noise can be reduced as much as possible.

According to the method for machining a corner groove according to the second aspect, since the tool for forming the slit is made of diamond abrasive grains, the slit can be easily formed not only on concrete but also on other objects. In addition, it is possible to pierce.

According to the corner groove machining apparatus of the third aspect, a direct motor as a drive source, a rotary shaft inserted through a rotor of the direct motor, fixed coaxially with the rotor, Since the processing device is configured to include the bit attached to the distal end portion, the method of claim 1 can be accurately performed. Moreover, since the bit fixes the diamond abrasive grains to the peripheral surface via the binder, the method of claim 2 can be carried out accurately.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a processing apparatus for performing a corner groove processing method of the present invention.

FIG. 2 is a cross-sectional view showing one embodiment of a processing apparatus for performing a corner groove processing method of the present invention.

FIG. 3 is an enlarged front view showing a bit mounted on a rotating shaft.

FIG. 4 is a sectional view showing a direct motor.

FIG. 5 is an explanatory view showing an embodiment of a corner groove processing method of the present invention.

FIG. 6 is an explanatory diagram of a case where a slit is provided in a concrete wall.

FIG. 7 is an explanatory cross-sectional view when a slit is provided at a corner portion using a cutter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Processing apparatus, 2 ... Direct motor, 3 ... Rotary axis, 5
... bits, 7 ... diamond bits, 9 ... rotors, 10
... stator.

Continuation of the front page (72) Inventor Toshio Imaoka 681 Saedo-cho, Tsuzuki-ku, Yokohama-shi, Kanagawa Prefecture Japan Diamond Co., Ltd. F term (reference) 3C022 EE02 EE11 3C069 AA01 BA02 BA09 BB01 CA10 EA02

Claims (3)

[Claims] 1. A processing method for forming a slit in a workpiece, comprising: a direct motor, wherein a stator is provided on an outer periphery of a cylindrical rotor, and a rotary shaft is inserted through the rotor and integrally fixed; Using a machining device having a bit attached to the rotary shaft of the direct motor, a slit is formed at a corner of the concrete wall to reach a deep portion of the corner at a corner of the concrete wall by the bit rotating with the rotary shaft by driving the direct motor. A corner groove machining method. 2. The corner groove processing method according to claim 1, wherein a diamond bit having diamond abrasive grains fixed on a peripheral surface thereof via a binder is used as the bit. 3. A direct motor in which a stator is provided on the outer periphery of a cylindrical rotor, and a rotary shaft is inserted through the rotor and fixed integrally therewith, and a bit mounted on a tip of the rotary shaft of the direct motor. A corner groove processing apparatus, wherein the bit has diamond abrasive grains fixed to a peripheral surface thereof via a binder.