KR20160117853A - Fixing structure of grinder wheelguard - Google Patents

Abstract

The present invention relates to a grinding machine comprising: a coupling member provided on a periphery of a rotary shaft of a body provided with a rotary shaft to which the grinder is coupled so that the grinder can be rotated; A wheel member rotatably provided on a periphery of the coupling member and a guard member fixed to the outer surface of the wheel member and configured to prevent a piece of debris generated during operation by the grinder from being caught by a worker, Wow; And a fixing means for selectively inserting a part of the wheel guard in the engaging groove so as to maintain a state in which the wheel guard is rotated and disposed at a specific position of the periphery of the grinder, And detachable and attachable, so that convenience for the user can be improved.

Description

[0001] FIXING STRUCTURE OF GRINDER WHEELGUARD [0002]

The present invention relates to a power tool, and more particularly, to a fixing structure of a grinder wheel guard.

Generally, a hand grinder is a tool used for cutting or cutting a metal workpiece directly on the spot while being carried by an operator, and is a machine for machining a workpiece using a donut-shaped disk-shaped grinding wheel. Cutting a metal according to a tool, machining a metal surface, or removing a corroded surface of a metal.

Meanwhile, in the hand grinder as described above, the safety cover for covering the grinding wheel is mounted. In the safety cover, when the metal workpiece is machined, flames or dust are generated due to friction between the grinding wheel and the workpiece, This is to prevent the risk of injury or workplace harm and to generate a certain gripping force in the hands of the operator gripping the grinder during the work, and to prevent injuries caused by the grinding wheel when the operator is careless.

FIG. 1 is a safety cover of a conventional hand grinder. Referring to FIG.

As shown in FIG. 1, the hand grinder includes a body 40 with a built-in driving motor, and a rotary shaft 60 that receives power from the driving motor and rotates the grinding wheel at one end of the body 40 The body 40 is formed with a head portion 50 protruding from a boundary with the rotary shaft portion 60.

The safety cover includes a front surface protection plate 20 protruding from the outer surface of the side surface protection plate 10 having a predetermined angle and is provided on the rotation axis portion 60 of the grinder at the center of the side surface protection plate 10, And is attached to the rotary shaft portion 60 of the grinder by the binding portion 30. The side surface protection plate 10 and the front surface protection plate 20 are provided on the side surface portion It is possible to prevent the worker from being injured due to the flame generated in the front part and also to prevent the workplace harm caused by the dispersion of the dust and in particular to prevent the worker's hands from approaching with the grinding wheel due to carelessness, It is possible to prevent.

However, in the conventional safety cover for a hand grinder as described above, when the angle at which the safety cover is positioned is changed according to the direction in which the fragments generated during the grinder work are changed, the screw fastened to the binding portion 30 is loosened, There is a problem that it takes much time and effort to attach / detach the safety cover or to adjust the angle because the angle is changed by fixing the screw to the binding part 30 again after adjusting the angle.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixing structure of a grinder wheel guard which can improve the convenience of a user by enabling a wheel guard provided on a grinder to be quickly adjusted and detached by a one- For that purpose.

According to an aspect of the present invention, there is provided a grinder comprising: a coupling member provided on a periphery of a rotation axis of a body provided with a rotation axis to which the grinder is coupled to rotate the grinder, the plurality of engagement grooves being formed along the circumferential direction; A wheel member rotatably provided on a periphery of the coupling member and a guard member fixed to the outer surface of the wheel member and configured to prevent a piece of debris generated during operation by the grinder from being caught by a worker, Wow; A fixing means for selectively inserting a part of the wheel guard into the engaging groove so as to maintain the wheel guard rotated and positioned at a specific position of the periphery of the grinder; The present invention also provides a fixing structure for a grinder wheel guard.

Here, the wheel member is provided at one side of the wheel member with a fastening member fixed to the body and formed with a fastening hole, and the fastening means has a central region fastened to the fastening hole of the fastening member, And a lever member having an operation knob for adjusting insertion of the insertion protrusion into the other end portion.

The distance from the central region to the operation knob may be formed to be at least longer than the diameter of the guard member.

Further, the height of the operation knob may be formed to protrude at least along the thickness direction of the lever member so as to have a height higher than that of the guard member.

In addition, a locking protrusion formed of an elastic material may be provided at a center region of the lever member so as to be inserted into the fastening hole of the fastening member and return to the original position after the lever member is moved.

The present invention has the effect of improving the convenience of the user by allowing the wheel guard provided on the grinder to be quickly adjusted in angle and detachable in a one-touch manner.

1 is a perspective view showing a structure of a conventional grinder,
2 is a perspective view showing a structure of a wheel guard installed in a conventional grinder,
3 is a perspective view illustrating the structure of a grinder according to an embodiment of the present invention,
FIG. 4 is a perspective view illustrating a method of operating a fixing structure of a grinder wheel guard according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a perspective view illustrating a structure of a grinder according to an embodiment of the present invention, and FIG. 4 is a perspective view illustrating a method of operating a grinder wheel guard fixing structure according to an embodiment of the present invention.

As shown in these drawings, the fixing structure of the grinder wheel guard according to an embodiment of the present invention includes a body 1 having a rotating shaft to which the grinder is coupled so as to rotate the grinder, An engaging member (100) having a plurality of engaging grooves (110) formed along its circumferential direction; A ring-shaped wheel member 210 rotatably provided on the periphery of the coupling member 100; a ring member 210 fixed to the outer surface of the wheel member 210, A guard member (200) composed of a guard member (220) for preventing the guard member And a fixing means 300 for selectively inserting a part of the wheel guard 200 into the engaging groove 110 so that the wheel guard 200 can be rotated and maintained at a specific position of the periphery of the grinder.

A body 1 is a member which is grasped at a position where the worker grasps the grinding work. The body 1 is provided with a driving motor, and on one outer surface thereof, Respectively.

A plurality of engaging grooves 100 are formed on the outer surface of the engaging member 100 at predetermined intervals along the circumferential direction of the engaging member 100, And the engaging groove 110 is formed in a shape that the outer surface of the engaging groove 100 is cut away from the lower end of the outer surface of the engaging member 100 to have a predetermined height.

A grinder wheel is fixedly coupled to the rotary shaft, and the grinder wheel is rotated and driven according to the rotation of the rotary shaft.

The wheel guard 200 prevents the periphery of the work due to the debris generated when the grinding operation is progressed by the grinder wheel to the periphery. In particular, the wheel guard 200 prevents the occurrence of safety accidents due to fragmentation It is effective that the wheel guard 200 is rotatably coupled to the periphery of the engaging member 100. [

The wheel guard 200 includes a ring-shaped wheel member 210 directly attached to the engaging member 100 at the periphery of the rotating shaft so as to be rotatable, And a guard member 220 having a fan-shaped cross-section so that the generated fragments can be prevented from being shaken to the operator.

The wheel member 210 is a ring-shaped member that is directly fastened to the outer surface of the engaging member 110 so as to be rotatable.

The guard member 220 is fixed to the outer surface of one side of the wheel member 210 so as to prevent the debris from leaking out during grinder work. For this purpose, the guard member 220 is formed to have a fan-shaped longitudinal cross- And is formed to have a constant height.

The fixing means 300 fixes the wheel guard 200 detachably attached to the coupling member 100 and provided at an angle with respect to the coupling member 100 at a specific position.

A coupling member 212 having a coupling hole 212a is formed at one side of the wheel member 210 so that the fixing member 300 can be installed on one side of the coupling member 100. [

The fixing means 300 is provided with an insertion protrusion 311 which is fastened to a central region of the fastening hole 212a of the fastening member 212 and is selectively inserted into the fastening groove 110 at one end, And a lever member 310 having an operation knob 312 for adjusting insertion of the insertion protrusion 311 into the insertion hole.

When the central region of the lever member 310 is fixed to the fastening member 212 and the operation knob 312 is rotated along the circumferential direction of the guard member 220 of the lever member 310, The wheel guard 200 is moved in a direction away from the wheel guard 200 and the insertion protrusion 311 is released from the locking groove 110 formed on the circumferential surface of the coupling member 100, So that the angle can be adjusted.

The distance from the central region of the lever member 310 to the operation knob 312 is formed to be at least longer than the diameter of the guard member 220 so that the operation knob 312 and the guard member 220 are in contact with each other, It is preferable to prevent interference.

The height of the operation knob 312 is formed to protrude at least along the thickness direction of the lever member 312 so as to have a higher height than the surface of the guard member 220. Therefore, when the operator adjusts the angle of the wheel guard 200, It is effective to allow the user to easily hold the finger 312 with his / her finger.

The lever member 312 is inserted into the fastening hole 212a of the fastening member 212 and can be returned to the original position after the lever member 312 is moved. 320 may be provided.

When the central region of the lever member 312 is fixedly coupled to the outer surface of the fastening protrusion 320 formed of the elastic material, the fastening protrusion 320 formed of an elastic material for rotating the lever member 312 is twisted to accumulate elasticity, Since the lever member 312 is restored to its original position by the elasticity when the lever member 312 is disposed, not only the operational convenience can be improved, but also the insertion protrusion 311 can be held in the engagement groove 110 The wheel guard 200 can be fixed at a specific position.

The process of adjusting the installation angle of the wheel guard using the grinder wheel guard fixing structure according to an embodiment of the present invention having such a configuration is as follows.

When the operation knob 312 is rotated by a predetermined angle along the circumferential direction of the guard member 220, the insertion protrusion 311 moves in a direction away from the side surface of the engagement member 100, And is separated from the groove 110.

In this state, the constraint of the wheel guard 200 is released, so that the wheel guard 200 is rotated to rotate the wheel guard 200 to a desired position, So that the angle can be adjusted.

The lever member 310 is returned to its original position by the elasticity accumulated in the fastening protrusion 320 formed of an elastic material when the knob 300 is rotated to the desired position and then the operating knob 312 is released. 311 are inserted into the engaging grooves 211 formed on the outer surface of the engaging member 100 to keep the wheel guard 200 in a rotated state.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

1: body 100: coupling member
110: Retaining groove 200: Wheel guard
210: wheel member 212: fastening member
212a: fastening hole 220: guard member
300: fixing means 310: lever member
311: insertion protrusion 312: operation knob
320: fastening projection

Claims (5)

An engaging member (100) having a plurality of engaging grooves (110) formed along a periphery of the rotating shaft of a body (1) having a rotating shaft to which the grinder is coupled so as to rotate the grinder;
A ring-shaped wheel member 210 rotatably provided on the periphery of the coupling member 100; a ring member 210 fixed to the outer surface of the wheel member 210, A guard member (200) composed of a guard member (220) for preventing the guard member
A fixing means 300 for selectively inserting a part of the wheel guard 200 into the engaging groove 110 so as to maintain the wheel guard 200 in a specific position of the periphery of the grinder;
Wherein the grinding wheel guard is fixed to the grinding wheel. The method according to claim 1,
A coupling member 212 having a coupling hole 212a is formed on one side of the wheel member 210 and a center region of the coupling member 212 is fixed to the coupling hole 212a of the coupling member 212 And a manipulation knob 312 provided at one end of the insertion protrusion 311 for selectively inserting the insertion protrusion 311 into the insertion groove 311, (310). ≪ RTI ID = 0.0 > 31. < / RTI > 3. The method of claim 2,
Wherein a distance from the central region to the operation knob (312) is formed to be at least longer than a diameter of the guard member (220). 3. The method of claim 2,
Wherein a height of the operation knob (312) is formed to protrude at least along a thickness direction of the lever member (312) so as to have a height higher than a surface of the guard member (220). 3. The method of claim 2,
The lever member 312 is inserted into the fastening hole 212a of the fastening member 212 and is returned to the original position after the lever member 312 is moved, 320) for supporting the grinder wheel guard.

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