JP2602007Y2 - Chamfer tool - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact and portable chamfering tool.

[0002]

2. Description of the Related Art As a compact and portable chamfering tool, for example, a tool disclosed in Japanese Utility Model Publication No. 3-57379 has been proposed. This chamfering tool applies a guide plate perpendicular to an L-shape to two surfaces forming a ridge line to be chamfered of a workpiece, and performs a chamfering operation with a rotary cutting blade which is viewed within the included angle of the guide plate. It is supposed to do. The relative position between the guide abutment plate and the rotary cutting blade can be adjusted, so that even a beginner can perform a stable operation.

[0003]

However, when chamfering with the above-mentioned conventional chamfering tool, the relative position between the guide abutment plate and the rotary cutting blade is adjusted to increase the cutting depth of the rotary cutting blade in order to improve work efficiency. Then, the contact of the cutting blade with the surface to be processed is increased, so that a large impact is applied to the handle, and the finish of the ground surface is deteriorated, and the damage and wear of the cutting blade are accelerated. Further, if the cut is made shallow and the machining is repeated to prevent damage to the work surface and the rotary cutting blade, the working efficiency will be reduced.

[0004] An object of the present invention is to provide a chamfering tool capable of performing work efficiently without imposing unnecessary load on a cutting tool in view of the above circumstances.

[0005]

In order to achieve the above object, a motor is provided at the tip of the handle so that its output axis is substantially perpendicular to the axis of the handle. A grinding wheel is provided at the tip of the rotating shaft that rotates, and a guide plate formed by two guide surfaces orthogonal to the V-shape is provided on a handle, located on the grinding surface side in front of the grinding wheel. Via the guide, the narrow bottom portion is directed toward the grinding wheel side, the bottom ridge passes through the axis of the rotating shaft, and the bottom ridge and the front surface of the grinding wheel are attached at a predetermined angle, and further mounted. At the bottom of the guide plate, a cutout window is formed on a side approaching the grinding wheel about the rotation axis so as to project a part of the grinding wheel into a narrow angle of the guide plate.

The flange guide is formed in a cylindrical shape, and is fitted to a flange provided on a handle so as to be adjustable in rotation and to be movable and adjustable in the same direction as the axis of a rotating shaft on which a grinding wheel is mounted. .

In the grinding wheel, the direction of rotation is set such that the grinding wheel rotates from the upper surface to the side surface of the workpiece at the contact portion with the workpiece. Further, the guide plate orthogonal to the V-shape is formed by two plates, and each end face of the two plates on the narrow angle bottom side is formed on a surface parallel to a rotating shaft provided with a grinding wheel. The two plates were fixed to a flange guide with a predetermined space between them.

[0008]

The grinding wheel is rotated by the motor to move the two surfaces of the guide plate against the upper surface and the side surface forming the ridge line to be chamfered. Then, the workpiece is chamfered by the grinding wheel protruding from the cutout window of the guide plate.

At this time, the grinding wheel protruding from the notch window of the guide plate is inclined with respect to the guide plate so that the inner peripheral side of the grinding wheel is small and the outer peripheral side thereof is large. By contacting the workpiece from the inner peripheral side of the workpiece, the amount of cut into the workpiece gradually increases, so that no excessive force acts on the workpiece and the grinding wheel, and the chamfering can be performed effectively.

[0010] By rotating the flange guide, the orientation of the guide plate can be adjusted according to the working environment. If the cutout window of the guide plate is located close to the handle, the working point is reduced. Since it is located between the rotating shaft of the grinding wheel and the hand side, it is easy to apply a force to the working point and the work is facilitated.

Also, by setting the direction of rotation of the grinding wheel such that the grinding wheel rotates from the upper surface side to the side surface of the workpiece at the contact portion with the workpiece, the burrs caused by grinding are reduced. You can avoid going out to the side.

Further, the guide plate orthogonal to the V-shape is formed by two plates, and each end face of the two plates at the narrow angle bottom side is a surface parallel to a rotating shaft provided with a grinding wheel. The two plates are fixed to a flange guide with a predetermined interval between the sub-guide surfaces of the two plates, so that the side portions of the plate-shaped workpiece are interposed between the sub-guide surfaces. Is inserted, the upper surface and the lower surface of the workpiece are supported by the two sub-guide surfaces in parallel with the rotation axis. By moving the workpiece in this state, the finishing of the side surface of the workpiece can be easily performed. .

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a handle, and 2 denotes a motor. The output shaft is provided at the tip of the handle 1 so as to be orthogonal to the axis of the handle 1. Reference numeral 3 denotes a gear fixed to the output shaft of the motor 2, and 4 denotes a flange provided at the tip of the handle 1 in parallel with the output shaft of the motor 2, and a plurality of flanges at predetermined intervals in the circumferential direction of the outer peripheral surface thereof. A screw hole 4a is formed.

[0015] 5 is a rotating shaft, and the rotary shaft 5 is supported on the inner periphery of the flange 4 through the bearings 6 freely parallel and rotating the output shaft of the motor 2. 7 is the rotating shaft 5
The gear 7 meshes with the gear 3 fixed to the output shaft of the motor 2, and transmits the rotation of the motor 2 to the rotating shaft 5.

Reference numeral 8 denotes a grinding wheel. The grinding wheel 8 is detachably attached to the tip of the rotating shaft 5 by a lock nut 9. The grinding wheel 8 rotates in response to the rotation of the rotating shaft 5. The rotation direction of the grinding wheel 8 is a contact portion with the workpiece, and the grinding wheel 8 is moved from the upper surface side to the side surface of the workpiece. It is set to rotate toward the side. 4 and 5 show an example of the grinding wheel 8 in which the overlapping direction of the grinding pieces 8a is different,
Use them according to the direction of rotation.

Numeral 10 is a flange guide formed in a cylindrical shape and slidably and rotatably fitted on the outer periphery of the flange 4. A plurality of elongated holes 10a which are long in the axial direction are formed at predetermined intervals in a cylindrical wall of the flange guide 10. 11
Is a screw for fixing the flange guide 10 fitted to the flange 4 to the flange 4. The screw penetrates the elongated hole 10 a and is screwed into the screw hole 4 a to fix the flange guide 10 to the flange 4. At the tip of the flange guide 10, two mounting surface portions 10b, 1 which form grooves at right angles to the V-shape.
0c, and the ridgeline of the groove bottom formed by the mounting surfaces 10b and 10c passes through the center of the rotating shaft 5,
In addition, the ridge line makes a predetermined angle with an extension of the front surface of the grinding wheel 8 attached to the tip of the rotating shaft 5.

In this embodiment, when the flange guide 10 is fitted to and fixed to the flange 4, the ridge line of the groove bottom formed by the mounting surface portions 10 b and 10 c coincides with the axial direction of the handle 1. The handle is set and fixed so that the rear end side is closer to the axis of the handle 1 than the front end side.
An opening 10d is formed in a groove bottom formed by the mounting surface portions 10b and 10c, and a part of the grinding wheel 8 is exposed from the opening 10d. Further, screw holes 10e are formed in the mounting surface portions 10b and 10c, respectively.

Reference numeral 12 denotes two guide surfaces 1 orthogonal to each other in a V-shape.
A guide plate formed by 2a and 12b;
The flange guide 10 is mounted on mounting surfaces 10b and 10c. The guide plate 12 has two plates 12
c, 12d. Plate 12c,
An elongated hole 12e is formed in each of the holes 12d. 12
f, the plates 12c and 12d are connected to the flange guide 10;
Are fixed to the mounting surfaces 10b, 10c, respectively, and pass through the elongated holes 12e, and are fixed to the mounting surfaces 10b, 10c.
c into the screw hole 10e formed in the plate 1
2c and 12d are fixed to the mounting surfaces 10b and 10c.

The plates 12c and 12d fixed to the mounting surface portions 10b and 10c have ends on the narrow angle bottom side.
It is fixed so as to be parallel to the ridge line at the bottom of the groove formed by b and 10c. Therefore, the ridge line A at the narrow angle bottom of the plates 12c and 12d passes through the center of the rotary shaft 5 and is attached to the tip of the rotary shaft 5 similarly to the ridge line at the bottom of the groove formed by the mounting surfaces 10b and 10c. A predetermined angle θ is formed with the extension line B on the front surface of the grinding wheel 8. In this embodiment, the plates 12c, 1
The ridgeline A at the bottom of the narrow angle 2d is fixed in a direction coinciding with the axial direction of the handle 1 and with the rear end side closer to the axis of the handle 1 than the front end side.

Notches 12g and 12h are formed at the ends of the plates 12c and 12d on the narrow bottom side so as to face each other on the side approaching the grinding wheel 8, and these notches 12g and 12h are formed. Constitute a notch window 12i of the guide plate 12. And this notch window 12
From i, a part of the grinding wheel 8 is changed to the plate 12c, 1
It protrudes within the included angle of the guide plate 12 constituted by 2d.

Each of the end faces of the plates 12c and 12d on the narrow bottom side is formed in a plane parallel to the rotary shaft 5 on which the grinding wheel 8 is provided.
j, 12k.

An elongated hole 12e through which a screw 12f for mounting and fixing the plates 12c and 12d to the mounting surfaces 10b and 10c of the flange guide 10 is elongated in the axial direction of the rotary shaft 5, and the plate 12c , 12
d is such that the distance between the sub-guide surfaces 12j and 12k formed at the end on the narrow angle bottom side within the range of the length of the elongated hole 12e can be arbitrarily adjusted.

Numeral 13 denotes a knob fixed to the flange guide 10, and numeral 14 denotes a switch provided on the handle 1.

Next, the operation and use example of the above embodiment will be described.

In the chamfering of the workpiece, the motor 2 is driven to rotate the grinding wheel 8 via the rotary shaft 5 so that the two guide surfaces 12a, 1
The workpiece 2b is moved while being brought into contact with the upper surface 15a and the side surface 15b which form the ridge line to be chamfered of the workpiece 15 (FIG. 6). Then, the corners of the workpiece 15 are ground and chamfered by the grinding wheel 8, a part of which is projected from the notch window 12 i of the guide plate 12 into the included angle of the guide plate 12.

At this time, the notch window 1 of the guide plate 12
2i, the grinding wheel 8 protruding into the included angle of the guide plate 12
Of the grinding wheel 8 is contacted from the inner peripheral side of the grinding wheel 8 to gradually increase the cut amount with respect to the workpiece 15. In addition, the chamfer can be effectively performed without excessive force acting on the workpiece 15 and the grinding wheel 8.

The protruding amount of the grinding wheel 8, a part of which protrudes from the notch window 12 i of the guide plate 12 within the included angle of the guide plate 12, sets the chamfering depth, so that the chamfering always has a constant depth. Processing can be performed easily and reliably. The protrusion amount of the grinding wheel 8 can be easily set by moving the flange guide 10 in the axial direction. Therefore, by adjusting the protrusion amount of the grinding wheel 8, the chamfering depth of the workpiece 15 can be arbitrarily set. Can be set.
Further, by rotating the flange guide 10, the direction of the guide plate 12 can be adjusted according to the working environment, and the notch window 12i of the guide plate 12 can be adjusted.
When the handle is located near the handle, the working point is located between the rotating shaft 5 of the grinding wheel 8 and the hand side, so that force is easily applied to the working point and the work is facilitated.

The direction of rotation of the grinding wheel 8 is set at the contact portion with the workpiece 15 so that the grinding wheel 8
Is set so as to rotate from the upper surface side 15a to the side surface side 15b, so that burrs due to grinding cause the upper surface side
Can be avoided.

In finishing the side surface of the plate-shaped workpiece, two plates 1 forming the guide plate 12 are formed.
The flange guide 1 is provided with an interval according to the thickness of the workpiece 16 between the sub guide surfaces 12j and 12k of 2c and 12d.
0, and the side of the workpiece 16 is inserted between the sub-guide surfaces 12j and 12k. The workpiece 16 has its upper surface 1
6a and the lower surface 16b are the two sub-guide surfaces 12j, 1
2k, the workpiece 1
The side surface 6 faces the grinding surface of the grinding wheel 8 (FIG. 7). By moving the workpiece 16 in this state, the side surface of the workpiece 16 is ground by the grinding wheel 8 and the side surface is finished. Since the distance between the sub-guide surfaces 12j and 12k of the two plates 12c and 12d forming the guide plate 12 can be adjusted arbitrarily, it can be set according to the thickness of the workpiece 16.

[0031]

As described above, according to the present invention, when chamfering a workpiece, the two guide surfaces of the guide plate are moved by contacting the upper surface and the side surface forming the ridge line to be chamfered. The chamfering of the workpiece is performed by a grinding wheel protruding from the notch window of the guide plate, but the grinding wheel protruding from the notch window of the guide plate has a smaller inner peripheral side and a smaller outer peripheral side of the grinding wheel with respect to the guide plate. Since it is inclined and protrudes so that it becomes larger, the amount of cut into the workpiece gradually increases by contacting the workpiece from the inner peripheral side of the grinding wheel, and excessive force is applied to the workpiece and the grinding wheel. Does not act, the chipping of the chamfered portion of the workpiece and the loss of the grinding wheel can be prevented, and the chamfering operation can be performed effectively.

The amount of protrusion of the grinding wheel protruding from the cutout window of the guide plate into the included angle of the guide plate sets the chamfering depth, so that the chamfering process of a constant depth is easily and surely performed. can be carried out, the amount of projection of the grinding wheel than can be easily set by moving the flange axially guided, by adjusting the projecting amount of the grinding wheel, arbitrarily set by the chamfer depth Can be. In addition, by rotating the flange guide, the direction of the guide plate can be adjusted according to the working environment, and if the cutout window of the guide plate is located near the handle, the working point will be the grinding wheel.
Since it is located between the rotating shaft of the tool and the hand side, it is easy to apply force to the working point and the work is facilitated.

Also, by setting the direction of rotation of the grinding wheel so that the grinding wheel rotates from the upper surface side to the side surface of the workpiece at the contact portion with the workpiece, the burrs generated by grinding can be removed from the upper surface. It is possible to avoid going out to the side.

In the finishing of the side surface of the plate-like workpiece, the flange guide is provided with a gap corresponding to the thickness of the workpiece between the sub-guide surfaces of the two plates forming the guide plate. By fixing and inserting the side of the workpiece between the sub-guide surfaces, the upper and lower surfaces of the workpiece are supported by the two sub-guide surfaces in parallel with the rotation axis, and the side surface of the workpiece is Is opposed to the grinding surface of the grinding wheel, and by moving in this state, the side surface of the workpiece is ground by the grinding wheel, so that the side surface of the plate-like workpiece can be easily and reliably finished. Can be.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a front view showing an example of a grinding wheel.

FIG. 5 is a front view showing an example of a grinding wheel.

FIG. 6 is an explanatory diagram showing a state of chamfering of a workpiece.

FIG. 7 is an explanatory diagram showing a state of a finishing process on a side surface of a plate-shaped workpiece;

[Explanation of symbols]

1 …………………………………………………
…… Handle 2 ………………………………………………………
…… Motor 4 …………………………………………………
…… Flange 5 …………………………………………………
…… Rotation axis 8 …………………………………………………
…… grinding wheel 10 ………………………………………………………
…… Flange guide 12 ……………………………………………………
…… Guide plate 12a ……………………………………………
…… Guide surface 12b ………………………………………………
…… Guide surface 12c ……………………………………………
…… Plate 12d ………………………………………………
…… Plate 12i …………………………………………
…… Notched window 12j …………………………………………
…… Sub guide surface 12k ……………………………………………
…… Sub guide surface

Claims (2)

(57) [Scope of request for utility model registration] 1. A motor is provided at the tip of a handle so that its output axis is substantially perpendicular to the axis of the handle, and a grinding wheel is provided at the tip of a rotating shaft that rotates by receiving the rotation of the motor. Located on the grinding surface side of the front of this grinding wheel,
A guide plate formed by two guide surfaces orthogonal to each other in a V-shape is formed through a flange guide provided on a handle, and a narrow bottom portion of the guide plate is directed toward the grinding wheel. And the ridgeline of the bottom and the front surface of the grinding wheel are formed so as to form a predetermined angle, the V-shaped guide plate is formed by two plates, and the narrow bottom side of the two plates Each of the end surfaces of the two plates is formed as a sub guide surface by forming a surface parallel to the rotating shaft provided with the grinding wheel, and is fixed to the flange guide with a predetermined interval between the sub guide surfaces of the two plates. Further, a notch window is formed at the bottom of the guide plate so as to project a part of the grinding wheel into a narrow angle of the guide plate on a side approaching the grinding wheel about the rotation axis. Chamfering tool to butterflies. 2. A motor is provided at the tip of the handle so that the output axis of the motor is substantially perpendicular to the axis of the handle, and a grinding wheel is provided at the tip of a rotating shaft that rotates by receiving the rotation of the motor. Located on the grinding surface side of the front of this grinding wheel,
A guide plate formed by two guide surfaces orthogonal to each other in a V-shape is formed through a flange guide provided on a handle, and a narrow bottom portion of the guide plate is directed toward the grinding wheel. And the ridgeline of the bottom and the front surface of the grinding wheel are formed so as to form a predetermined angle, the V-shaped guide plate is formed by two plates, and the narrow bottom side of the two plates Each of the end surfaces of the two plates is formed as a sub guide surface by forming a surface parallel to the rotating shaft provided with the grinding wheel, and is fixed to the flange guide with a predetermined interval between the sub guide surfaces of the two plates. Further, the flange guide is formed in a cylindrical shape, and is fitted to a flange provided on a handle so as to be rotationally adjustable and to be movable and adjustable in the same direction as the axis of the rotating shaft to which a grinding wheel is attached. Chamfering tool the bottom of the guide plate, characterized in that the formation of the cutout window to protrude included angle within the portion of the guide plate of the grinding wheel on the side close to the grinding wheel about the said rotation axis.