KR102139421B1 - Grinder wheel holder for hand grinder - Google Patents

Abstract

The present invention relates to a fixing device used when simply attaching and removing a grinder blade such as a cutting stone or abrasive stone to the grinder side.
The present invention can easily mount and remove the grinder blade in a one-touch manner through a simple rotation operation when mounting the grinder blade, and a simple pressing and rotation operation when removing, while the organic between the holder side pressing device and the body side pressing device By implementing a new grinder blade fixing method capable of crimping the grinder blade closely by using the pressing action according to the mutual engagement structure, it is possible to completely eliminate the risk of accident, such as holding the grinder blade firmly and stably, It provides a grinder blade fixing device for hand grinders that can secure excellent machining quality as well as precision machining.

Description

Grinder blade fixing device for hand grinders {GRINDER WHEEL HOLDER FOR HAND GRINDER}

The present invention relates to a grinder blade fixing device for a hand grinder, and more particularly, to a fixing device used when simply attaching and removing a grinder blade such as a cut stone or abrasive stone to the hand grinder side.

Hand grinders, which are generally used for industrial machinery, shipbuilding, and many other equipment, mainly smooth the rough surface or the part to be painted of primary processed parts, or primary such as pipes, angles, steel plates, etc. It is used for applications such as partially cutting and cutting raw materials.

For example, the hand grinder is powered by an electric motor or a compressor to operate the grinder shaft at high speed, and an object made of stone, metal, etc. by cutting or polishing disk mounted on the grinder shaft. It is used to finish the surface by polishing the surface of the surface or grinding, cutting, and cutting parts or corners that have not been processed.

Usually, the grinder blade of a hand grinder is fixed by using a nut after being fitted to the grinder shaft, or by attaching a bolt to the grinder shaft to fix it.

These grinder blades have a short life cycle and must be replaced frequently during work such as cutting or polishing.

However, in order to replace the grinder blade, it takes a lot of time for the replacement operation such as unscrewing and tightening the nut that is tightened tightly, and the replacement operation is also difficult, and thus there is a disadvantage that the polishing operation or the cutting operation is delayed.

In view of this, Korean Patent Registration No. 10-1737890 proposes a “cutting wheel fixture and a polishing apparatus including the same”.

The "cutting wheel fastener and a polishing apparatus including the same" is made in a manner that the cutting wheel can be relatively easily attached and detached using a fastener composed of a disk unit, a holder body, and a fixing unit.

However, the "cutting wheel fixture and a polishing apparatus including the same" has the following problems.

First, when cutting with the grinder blade (cut stone) on the side, the grinder blade flows from side to side while the spring's elastic flow occurs while the disc unit holds the grinder blade depending only on the force of the spring. As a result, as a result, there is a disadvantage that it is impossible to secure an accurate cutting quality such as difficulty in maintaining straightness.

Secondly, when the grinder blade (abrasive stone) is laid at an angle, the worker works while pressing the grinder blade, and as a result, there is a fear that the grinder blade may be disengaged while the pressed side of the spring holding the grinder blade is pressed. There is a disadvantage that the risk of back accidents is high.

Third, the grinder blade that rotates at high speed depends on two pins to maintain the locking state against the rotational direction, so the grinder blades may damage the product, such as the pins being pulled out or pushed due to wear or damage of the pins. There are disadvantages.

Fourth, when installing and removing the grinder blade, especially during installation, the grinder blade must be fitted on the side of the disc unit and the spring that exerts strong elasticity must be pressed. There is a disadvantage that the work is inconvenient, such as having to fit it in the hole.

Korean Registered Patent 10-1737890

Therefore, the present invention has been devised in view of such a point, and when the grinder blade is mounted, the grinder blade can be easily mounted and removed in a one-touch manner through a simple rotation operation and a simple pressing and rotation operation when removing. By implementing a new grinder blade fixing method that can press the grinder blade closely by using the pressing action according to the organic interlocking structure between the holder-side pressing device and the body-side pressing device, the grinder blade can be held firmly and stably. The purpose of the present invention is to provide a grinder blade fixing device for hand grinders that can completely eliminate the risk of accidents, such as, and ensure excellent processing quality as well as precision machining.

In order to achieve the above object, the grinder blade fixing device for a hand grinder provided in the present invention has the following features.

The grinder blade fixing device for the hand grinder is formed with a hole through which the drive shaft of the hand grinder penetrates in the center, and an inner wall having a female threaded portion to which a male screw portion of a stopper is fastened, and opposite to each other while having an upper inclined surface. The body is provided with a pair of body-side pressing devices positioned at the center, and has a hole through which a stopper penetrates while being coaxially coupled to the upper part of the body and installed to be rotatable and axially movable. In addition to being fitted into the slit, a straight fixed block having a keyway for the passage of the stopper in the middle of the length is formed to protrude, and on the bottom, opposite to each other, having a lower slope capable of engaging the upper slope of the body-side pressing device in the body. The holder is provided with a pair of holder-side pressurization devices that are positioned, and a female threaded part to which the drive shaft of the hand grinder is fastened is formed at the center, and at the same time, it is installed in a structure that is fastened to the female threaded part of the body using a male threaded part at the bottom, Through the contact with the upper surface of the fixed block to restrict the upward movement of the holder, along with the upper surface of the fixed block, a straight-shaped stopper having a pair of wing parts for fixing the grinder blades therebetween, and the body side and the holder Interposed between the sides is made of a structure including a spring that elastically supports the holder.

Here, the holder may include a guide tube that extends downward from the bottom surface and guides rotation and upward movement of the holder while being in close contact with the outer wall surface of the outer wall formed on the body.

In particular, the body-side pressing device and the holder-side pressing device are in the form of an arc-shaped wall, and each of the upper inclined surfaces and the lower inclined surfaces is formed of inclined surfaces of opposite structures facing each other. The side pressure device and the holder side pressure device can be engaged while being tightly engaged with each other in the rotational direction of the grinder blade.

In addition, the fixing block and the stopper of the holder may be formed in a rectangular shape corresponding to the rectangular slit shape of the grinder blade.

In addition, the upper surface of the fixed block formed in the holder may be formed of a convex curved surface having a gentle curvature along the length of the block.

The grinder blade fixing device for a hand grinder provided in the present invention has the following effects.

First, the grinder blade can be easily installed and removed in one touch by simply pressing and rotating when removing the grinder blade. There is an effect that can be done.

Second, the pressing device formed in the holder and the pressing device formed in the body are mutually pressurized in the same direction as the direction of rotation of the grinder blade through their inclined surfaces, and as a result, the holder is pushed toward the stopper. By crimping and fixing the grinder blade that is coupled to, the grinder blade is fixed more firmly, so that the deviation of the grinder blade can be fundamentally blocked, and thus there is an effect of protecting the safety of the operator.

Third, by inserting the holder into the slit of the grinder blade, by using the entire length section of the holder side, the grinder blade is firmly and stably supported, and the holder is subject to axial flow regulation between the body and the stopper. It can protect workers from the risk of accidents, such as being able to completely eliminate the flow problem, departure problem, etc., and has the effect of not only enabling precision machining but also securing excellent processing quality.

Fourth, by applying a binding structure between the slit of the grinder blade and the holder, the contact area (curvature) between the shaft of the body and the hole of the grinder blade can be sufficiently secured, thereby accurately concentricity even when the grinder blade is reused. It is possible to stably maintain the binding state of the grinder blade such as being able to fit, and accordingly, it is possible to accurately perform operations such as cutting and polishing by minimizing shaking or flow of the grinder blade.

1 to 3 is a perspective view showing a grinder blade fixing device for a hand grinder according to an embodiment of the present invention
Figure 4 is a cross-sectional view showing a grinder blade fixing device for a hand grinder according to an embodiment of the present invention
Figure 5 is a perspective view showing the use state of the grinder blade fixing device for a hand grinder according to an embodiment of the present invention

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

1 to 3 is a perspective view showing a grinder blade fixing device for a hand grinder according to an embodiment of the present invention, Figure 4 is a sectional view showing a grinder blade fixing device for a hand grinder according to an embodiment of the present invention.

1 to 4, the grinder blade fixing device for the hand grinder includes a body 17 as a means for supporting the stopper 11, the holder 22, and the like.

The body 17 is formed in a circular plate shape in which a hole 10a is formed in the center, and a circular inner wall 14 is formed on the upper surface of the body 17 along the periphery of the hole 10a. At the same time, a circular outer wall 25 is formed along the edge.

At this time, the drive shaft of the hand grinder can pass through the hole 10a formed in the center of the body 17.

Here, the inner wall 14 and the outer wall 25 form a concentric circle to maintain a certain distance from each other, and the groove portion formed naturally between the inner and outer wall 25 at this time, the lower end of the spring 24 to be described later As it is inserted, it can be supported.

In addition, a female screw portion 13a is formed on the inner circumferential surface of the inner wall 14, and the male screw portion 12 of the stopper 11 can be fastened to the female screw portion 13a formed in this way.

That is, the stopper 11 can be coupled to the body 17 side while being fastened to the female screw portion 13a using the male screw portion 12.

In particular, the top surface of the body 17, that is, the bottom surface of the groove portion formed between the inner wall 14 and the outer wall 25 are opposite to each other, for example, having a phase difference of 180° and facing each other. There is a pair of body-side pressing device 16 is formed to protrude the inner wall 14 along the circumference.

The body-side pressing device 16 is in the form of an arc-shaped wall, and the upper end of the body-side pressing device 16 is formed with an upper inclined surface 15 of a higher shape along the circumferential direction.

Here, each of the upper inclined surfaces 15 formed in the pair of body-side pressing devices 16 can be inclined from bottom to top toward the same direction based on the circumferential direction of the disk. The end of the upper inclined surface 15 can achieve the same surface as the upper end of the inner wall 14.

The upper inclined surface 15 of the body-side pressing device 16 and the lower inclined surface 20 in the holder-side pressing device 21, which will be described later, can be made of inclined surfaces of opposite structures facing each other, Accordingly, when the holder 22 rotates, the lower inclined surface 20 of the holder-side pressing device 21 is in contact with the upper inclined surface 15 of the body-side pressing device 16, and slides upwards along the inclined structure. It can be elevated.

In addition, the grinder blade fixing device for the hand grinder includes a holder 22 as a means for substantially holding the grinder blade.

The holder 22 is made in the form of a circular plate having a hole 10b at the center, and a grinder blade can be seated on the upper surface of the disc-shaped plate at this time.

The holder 22 is coupled to the upper part of the body 17 in a coaxial structure, and is installed in a structure capable of rotating and moving (rising) in the axial direction around its own axis in this combined state.

In addition, the upper surface of the holder 22 is inserted into the slit of the grinder blade and is formed while protruding a fixed block 19 of a straight shape, which serves to constrain the flow in the rotational direction of the grinder blade.

The fixed block 19 is formed side by side along the radial direction passing through the central axis of the holder 22, the middle of the length of the fixed block 19 is formed such that the block has a certain width (size corresponding to the diameter of the cylindrical body of the stopper) The width of the key groove 18 is formed in a cut shape.

At this time, the key groove 18 is a concave curved surface so that the cylindrical body of the stopper 11 can be closely supported.

Thus, as the grinder blade is fitted to the straight-shaped fixing block 19 through the straight-shaped slit, both side portions of the fixed block 19 can be slit through the entire length of the fixed block 19. By restricting the flow in the rotational direction, it is possible to maintain a firm and stable mounting state of the grinder blade.

In addition, the upper surface of the fixed block 19 forms a gentle curvature along the length of the block and can be made of a curved surface 27 convex upward, and as the upper surface of the fixed block 19 is formed of a curved surface 27, When the grinder blade is laid at an angle during a polishing operation, a problem that the processed product and the fixing block 19 cause contact interference can be excluded.

A circular guide tube 26 extending vertically downward along the edge portion is integrally formed on the bottom surface of the holder 22, and the guide tube 26 formed in this way is formed in the body 17 through its inner circumferential surface. As it is in close contact with the outer circumferential surface of the outer wall 25, it serves to guide the upward and downward movements as well as the rotational movement of the holder 22.

On the other hand, when the holder 22 and the body 17 are vertically coupled, the lower position of the holder 22 (the position where the lift is regulated by the stopper before mounting the grinder blade) as well as the raised position of the holder 22 (grinder mounting) After the holder is moved upward by the spring force), the guide tube 26 of the holder 22 can be kept in a concentric circle around the outer wall 25 of the body 17, and accordingly When grinding the grinder blades at an angle, even when the operator works while pressing the grinder blades eccentrically, the entire holder 22 holding the grinder blades is not pressed, and there is a concern that the grinder blades may be released. There is an advantage that can be solved neatly.

In a preferred embodiment, the present invention provides a structure for maintaining a close binding relationship between the fixing block 19 of the holder 22 and the slit of the grinder blade.

As an example, the fixing block 19 of the holder 22 may be formed in a rod shape of a rectangle while forming an overall straight shape, and correspondingly, a shape of a slit formed in a grinder blade may also be formed in a straight shape of a rectangular shape. do.

Accordingly, when the slit of the grinder blade is fitted to the rectangular-shaped fixed block 19, the grinder blade at this time is hung over the entire circumference of the rod-shaped fixed block 19, so that a solid mounting state can be maintained. Thus, the grinder blade can be stably rotated without being detached or flowed.

At this time, the stopper 11 disposed on the upper side of the fixing block 19 can also be formed in a rod shape of a rectangular shape forming a straight line.

As another example, although not shown in the drawings, the fixing block 19 of the holder 22 is formed in a flat-shaped bar-shaped bar shape at the same time as a whole, and at the same time, the flat-shaped bar-shaped center of the block It is possible to achieve left-right symmetry as a reference, and correspondingly, the shape of the slit formed on the grinder blade can also be made into a straight symmetrical fan shape.

Accordingly, when the slit of the grinder blade is fitted to the symmetrical fan-shaped fixed block 19, the grinder blade at this time is hung over the entire circumference of the rod-shaped fixed block 19 so that a rigid mounting state can be maintained. Therefore, the grinder blade can be stably rotated without being displaced or flowed.

At this time, the stopper 11 disposed on the upper side of the fixing block 19 may also be formed in a bar shape of a symmetrical fan shape forming a straight line.

Here, when the fixing block 19 of the holder 22 is formed in a symmetrical fan shape corresponding to the conical fan shape of the slit, the center side width of the symmetrical fan shape of the fixed block 19 is the center of the rectangular shape It can be made in a relatively narrow width compared to the width.

Of course, both the central width of the symmetrical fan shape and the central width of the rectangular shape can be made to be relatively narrow compared to the diameter of the cylindrical body of the stopper 11.

In this way, as the center width of the symmetrical fan shape of the fixed block 19 is made to be relatively narrow compared to the center width of the rectangular shape, the circumferential surface of the cylindrical body of the stopper 11 can be secured wider (longer). In the end, it is possible to sufficiently secure the contact section of the center hole of the grinder blade to be fitted to the cylindrical body at this time, so that even when the grinder blade is reused repeatedly, that is, the grinder blade in which the center hole portion is worn by repeated use Even when reused, the concentricity of the grinder blade can be precisely matched, and therefore, the binding state of the grinder blade can be stably maintained. There will be.

Particularly, a pair of holder-side pressing devices 21 protrude along the periphery of the hole 10b at opposite positions to each other on the bottom surface of the holder 22, for example, having a phase difference of 180° and facing each other. .

The holder-side pressing device 21 is in the form of a wall in the form of an arc, and at the bottom of the holder-side pressing device 21, a lower inclined surface 20 having a high shape along the circumferential direction is formed.

Here, each of the lower inclined surfaces 20 formed in the pair of holder-side pressing devices 21 can be inclined from bottom to top toward the same direction with respect to each other based on the circumferential direction of the disk.

The lower inclined surface 20 of the holder-side pressing device 21 and the upper inclined surface 15 of the body-side pressing device 16 can be made of inclined surfaces of opposite structures facing each other, and accordingly the holder Upon rotation of the 22, the lower inclined surface 20 of the holder-side pressing device 21 is in contact with the upper inclined surface 15 of the body-side pressing device 16 and can be raised upward along a sliding and inclined structure. There will be.

When the holder 22 is rotated and raised in this way, the lower inclined surface 20 of the holder-side pressing device 21 rises on the upper inclined surface 15 of the body-side pressing device 16, so that the holder 22 is It is possible to be in close contact with the grinder blade side, and at this time, even when the holder 22 receives a force to be rotated in the rotational direction of the grinder blade due to the frictional force according to the rotation of the grinder blade, the holder-side pressing device having mutual relationship with each other ( The lower inclined surface 20 of the 21) and the upper inclined surface 15 of the body-side pressing device 16 can be engaged while being tightly engaged with each other, that is, as force is applied in a direction to rotate, the upper inclined surface 20 and the lower end The inclined surfaces 20 are tightly engaged with each other, and as a result, the holder 22 can be firmly and closely fixed to the grinder blade while being pressed more and more toward the grinder blade side.

In addition, the grinder blade fixing device for the hand grinder includes a stopper 11 as a means for fixing the grinder blade together with the holder 22 to prevent the grinder blade from coming off.

The stopper 11 is made of a shape having a wing portion 23 in a straight line on both sides of the outer surface of the hollow cylindrical body.

The female screw portion 13b is formed on the inner circumferential surface of the cylindrical body of the stopper 11, and the driving shaft of the hand grinder is fastened there, and the male screw portion 12 is formed on the outer circumferential surface of the lower end of the cylindrical body, so the stopper 11 It can be installed in a structure that is fastened to the female screw portion 13a of the body 17 using the male screw portion 12.

Here, the wing portion 23 of the stopper 11 may be formed in a rod shape of a rectangular shape forming a straight line, or a symmetrical fan shape forming a straight line.

The stopper 11 installed in this way makes it possible to selectively regulate the upward movement of the holder 22 in contact with the upper surface of the lower fixing block 19 through the bottom surface of the wing portion 23.

For example, when the wing portion 23 of the stopper 11 and the fixed block 19 of the holder 22 are overlapped in a straight shape or cause interference with each other in the vertical direction, the fixed block 19 is the stopper ( It is blocked by the wing part 23 of 11) and cannot rise upward, and the rotation of the holder 22 causes the fixed block 19 to cross with respect to the wing part 23 of the stopper 11, and thus an angle range of about 90° When arranged in an angle range of 45° to the left and right, the stopper 11 at this time enters into the keyway 18 of the fixed block 19 and allows the entire holder 22 to rise upward. Therefore, the grinder blade can be interposed in a compressed state between the bottom surface of the wing portion 23 of the stopper 11 and the top surface of the holder 22 in a state fitted to the fixing block 19.

In addition, the grinder blade fixing device for the hand grinder includes a spring 24 that elastically supports the holder 22 upwards to provide a force to allow the holder 22 to crush and fix the grinder blade.

The spring 24 is supported while being supported at the bottom of the upper portion of the body 17, that is, the groove portion between the inner and outer walls 14 and 25 formed on the body 17 side, and the spring while being supported at the bottom of the holder 22 By exerting a force, the holder 22 can always be pushed upward to lift it.

Accordingly, the holder 22 is regulated by the stopper 11 so that the spring 24 remains in a compressed state in a state where the lift is limited, and at the time when the holder 22 is out of regulation by the stopper 11 The holder 22 can be lifted upward by the expansion force of the spring 24.

5 is a perspective view showing a use state of the grinder blade fixing device for a hand grinder according to an embodiment of the present invention.

As shown in FIG. 5, here, the procedure for mounting the grinder blade 110 to the grinder blade fixing device mounted on the drive shaft 130 of the hand grinder 100 is shown.

First, the fixed block 19 of the holder 22 and the slit 120 of the grinder blade 110 in a state in which the wing portions 23 of the stopper 11 are aligned side by side in the fixed block 19 Insert it.

Next, when the grinder blade 110 is turned clockwise or counterclockwise, the entire holder 22 including the grinder blade 110 and the fixing block 19 is rotated together (at this time, the grinder blade is rotated as before). No need to rotate while pressing).

Next, in the process of continuously rotating the grinder blade 110 and the holder 22 in the same direction, the time point when the fixing block 19 of the holder 22 and the wings 23 of the stopper 11 are shifted from each other When, at this point, the holder 22, which receives the force of the spring (not shown), rises upward with the grinder blade 110.

At this time, the lower inclined surface (reference numeral 20 of FIG. 2) of the holder-side pressing device (reference numeral 21 of FIG. 2) in the holder 22 is a body-side pressing device (reference numeral 16 of FIG. 2) ) Climbs on the upper inclined surface (reference numeral 15 in FIG. 2), and the holder 22 can rotate and rise while receiving the sliding guide between the upper and lower inclined surfaces 15 and 20.

Subsequently, the grinder blade 110 raised upward together with the holder 22 is compressed between the upper surface of the holder 22 and the bottom surface of the wing portion 23 of the stopper 11 to prevent the removal in the axial direction. In addition, the mounting of the grinder blade 110 is completed when it is hung in the rotational direction by the fixing block 19 fitted to the slit 120.

As such, simply insert the grinder blade 110 into the fixing block 19 of the holder 22 and rotate the grinder blade 110 about 90°, so that the grinder blade 110 can be mounted, making it difficult to mount the grinder blade. This can be done easily, and the time required for the installation work can be greatly reduced.

In addition, since the grinder blade 110 is hung in the form of a surface contact by the fixing block 19, it is possible to maintain the mounting state of the grinder blade 110 firmly and stably.

In particular, when working with a hand grinder in a state where the grinder blade 110 is mounted, the holder 22 receiving the frictional force due to the rotational force of the grinder blade 110 also receives the force to be rotated in the same direction, and attempts to rise When the force is exerted, the lower inclined surface 20 of the holder-side pressing device 21 rides on the upper inclined surface 15 of the body-side pressing device 16, and the lower inclined surface of the holder-side pressing device 21 ( 20) and the upper inclined surface 15 of the body-side pressing device 16 can be engaged while being tightly engaged with each other, and thus the holder 22 is further pressed toward the grinder blade side, together with the wing portion 23 of the stopper 11 It is possible to completely eliminate the problem of deviation of the grinder blade 110, such as being able to fix the grinder blade 110 firmly and closely.

Conversely, when removing the grinder blade 110 from the side of the hand grinder 100 after work, while pressing the grinder blade 110 while turning in a clockwise or counterclockwise direction, the stopper block 19 of the holder 22 is stopped. When aligned with the wing portion 23 of (11), since the grinder blade 110 can be easily separated from the grinder blade fixing device, the separation operation of the grinder blade 110 can be facilitated.

As described above, the present invention includes a combination of a holder and a stopper for holding the grinder blade of a hand grinder, and a new form including a pressing device for pressing the holder and the stopper in close contact with the grinder blade in particular. By providing the grinder blade fixing device, it is easy to replace the grinder blade with simple operation, and it is possible to maintain the sturdy and stable mounting state of the grinder blade and at the same time completely prevent the grinder blade from being displaced. It can be protected from, and can improve the accuracy of cutting and polishing operations to ensure processing quality.

10a,10b: Hall
11: stopper
12: male thread
13a, 13b: female thread
14: interior wall
15: upper slope
16: Body side pressure device
17: body
18: keyway
19: fixed block
20: lower slope
21: holder-side pressure device
22: holder
23: wing
24: spring
25: external wall
26: guide tube
27: curved surface

Claims (5)

A hole 10a through which the drive shaft of the hand grinder penetrates is formed at the center, and an inner wall 14 having a female threaded portion 13a to which the male threaded portion 12 of the stopper 11 is fastened is formed, and on the upper surface A body 17 having a pair of body-side pressing devices 16 positioned opposite each other while having an upper inclined surface 15;
While having a hole (10b) through which the stopper (11) penetrates in the center, it is installed to be rotatable and axially movable while being coupled in a coaxial structure on the upper part of the body (17), and it is fitted with a slit in the grinder blade on the upper surface and is lengthened. In the middle, a flat fixing block 19 having a key groove 18 for passage of the stopper 11 is protruded, and at the bottom, the upper inclined surface 15 of the body-side pressing device 16 in the body 17 and A holder 22 having a pair of holder-side pressurizing devices 21 positioned opposite each other while having an engaging lower slope 20;
A female screw part 13b to which the drive shaft of the hand grinder is fastened is formed at the center, and is installed in a structure that is fastened to the female screw part 13a of the body 17 using the male screw part 12 at the lower end, and through the bottom surface. In contact with the upper surface of the fixed block 19, while restricting the upward movement of the holder 22, a pair of wing portions 23 that fix the grinder blade between the top and bottom together with the upper surface of the fixed block 19 A branched stopper 11;
A spring 24 interposed between the body 17 side and the holder 22 side to elastically support the holder 22;
Including,
The slit 120 of the grinder blade 110 is inserted into the fixed block 19 in a state in which the fixed block 19 of the holder 22 and the wing 23 of the stopper 11 are aligned side by side in a line. And, when the grinder blade 110 is turned clockwise or counterclockwise, the entire holder 22 including the grinder blade 110 and the fixing block 19 is rotated together, and the grinder blade 110 and holder ( In the process of continuously rotating 22) in the same direction, when it comes to a position where the fixing block 19 of the holder 22 and the wing 23 of the stopper 11 are displaced from each other, at this point, the spring 24 The holder 22 under the force is raised upward with the grinder blade 110, and the lower inclined surface 20 of the holder-side pressing device 21 in the holder 22 is pressurized on the body side in the body 17 Riding on the upper inclined surface 15 of the device 16, and thus receiving the sliding guide between the upper and lower inclined surfaces 15 and 20, the holder 22 can be rotated and raised, and ascended upward with the holder 22 The grinder blade 110 is compressed between the upper surface of the holder 22 and the bottom surface of the wing portion 23 of the stopper 11 to prevent the removal in the axial direction, and a fixed block fitted in the slit 120 ( The grinder blade fixing device for a hand grinder, characterized in that the installation of the grinder blade 110 is completed when it is hung in the rotational direction by 19).
The method according to claim 1,
The holder 22 is formed to extend downward from the bottom surface and guide pipes 26 that guide rotation and upward movement of the holder 22 while being in close contact with the outer wall surface of the outer wall 25 formed in the body 17 ) A grinder blade fixing device for a hand grinder comprising a.
The method according to claim 1,
The body-side pressing device 16 and the holder-side pressing device 21 are arc-shaped walls, and the upper inclined surfaces 15 and the lower inclined surfaces 20, respectively, have opposite surfaces facing each other. ) By being made of an inclined surface of the structure, the grinder blade for a hand grinder, characterized in that the body-side pressing device 16 and the holder-side pressing device 21 can be engaged while being tightly engaged with each other in the rotational direction of the grinder blade. Fixing device.
The method according to claim 1,
A grinder blade fixing device for a hand grinder, characterized in that the fixing block (19) and the stopper (11) of the holder (22) are formed in a rectangular shape corresponding to a rectangular slit shape of the grinder blade.
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