KR101609317B1 - Polishing appartus - Google Patents

Abstract

An object of the present invention is to provide a polishing apparatus capable of attaching / detaching a polishing unit to / from a polishing wheel by simply rotating the polishing unit by hand, and preventing the polishing unit mounted on the polishing wheel from being detached during polishing.
A polishing apparatus according to the present invention is a polishing apparatus comprising a base portion having a driving portion formed on one side thereof, a polishing wheel connected to the driving portion and having a coupling groove formed on the bottom surface thereof, And a polishing portion on which a coupling protrusion is formed,
Wherein both side walls of the engaging groove are formed with a seating step,
On both sides of the coupling protrusions, an inner wing portion to be seated on the seating jaw is protruded when the coupling protrusions rotate.

Description

[0001] POLISHING APPARTUS [0002]

The present invention relates to a polishing apparatus

Generally, a polishing apparatus is used for polishing and polishing the surface of a polished object such as concrete, stone such as marble or the like, polishing or removing a floor paint or urethane, A plurality of shoWs detachably fixed to one surface of the disk plate, and an abrasive member fixed to the shoe and directly grinding and polishing the abrasive to be polished. The disk plate is coupled to the rotating shaft of the motor-driven grinder , And the working and grinding operations are performed by rotating the disk plate by driving the electric grinding machine in a state in which the grinding member is in contact with the surface of the grinding target.

The abrasive member is made of a predetermined shape by mixing diamond powder with metal powder such as iron, tungsten, cobalt, etc. and sintering at a high temperature. When the shoe is made of a metal material, the abrasive member is directly fused to the surface of the shoe When the shoe is made of a sintered alloy, it is fixed by integrally sintering together the polishing members when the shoe is sintered.

The processing and grinding of the object to be ground are performed in the order of rough grinding, intermediate grinding, and fine grinding, and each step must be replaced with an abrasive member suited to the degree of processing and polishing. For this purpose, The swiftness and convenience of the shoe attachment and detachment operation are greatly influencing the workability and productivity in grinding the grinding target.

No. 10-0492854 entitled " Grinding Wheel " has been proposed as a conventional shoe attachment / detachment structure.

In the prior art, a plurality of fixing grooves are radially formed on one surface of the disc plate, and fixing protrusions of a corresponding shape fit to the fixing grooves are formed on the bottom surface of the shoe on which the polishing member is fixed, To the fixing groove of the disk plate.

The fixing groove and the fixing protrusion are tapered so that the width gradually decreases from the center of the disc plate toward the outer side. The depth of the fixing groove is gradually increased from the center of the disc plate toward the outer side, And the cross-sectional structure of the fixing groove and the fixing projection has a shape called a so-called dovetail.

Therefore, when the fixing protrusion of the shoe is fitted to the wide side of the fixing groove and then the fixing protrusion is moved to the narrow side, the fixing protrusion is fitted in the fixing groove in the form of the wedge- When the shoe is moved to the wide side in the fixed state, the space between the fixing groove and the fixing protrusion becomes loose, so that the shoe can be separated from the disc plate.

Further, when the end surface of the fixing groove and the fixing protrusion are formed in a dovetail shape, it is possible to prevent the shoe from being detached when the disk plate is turned upside down in the state where the shoe is fixed.

However, in the conventional shoe attachment / detachment structure as described above, since the fixing projections of the shoe are coupled to the fixing grooves of the disk plate by the wedge structure, when the shoe is attached to or detached from the disk plate, You have to hit and blow the shoe several times with a hitting tool like.

Therefore, it is necessary to provide a separate striking tool in the process of removing and shoehring, and it is very cumbersome and time consuming because it requires striking process by the striking tool. Therefore, workability and productivity are lowered when grinding the grinding target, The appearance of the shoe is deformed by the impact applied thereto, thereby shortening the life of the shoe and causing economic loss.

In addition, since the shoe is simply coupled with the disc plate through the interference fit, the shoe fitting state may be loosened during the friction between the shoe and the ground during the polishing process,

In this case, when the disk plate is lifted to replace the shoe, the shoe may be detached from the disk plate and may be damaged or injured to the worker's body.

Patent Registration No. 10-0492854 (2005.05.24) Public Utility Model Publication No. 20-2010-0001515 (2012.09.03) Patent Registration No. 10-0987579 (Jun. 10, 2010)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a polishing apparatus, The present invention has been made in view of the above problems.

A polishing apparatus according to the present invention is a polishing apparatus comprising a base portion having a driving portion formed on one side thereof, a polishing wheel connected to the driving portion and having a coupling groove formed on the bottom surface thereof, And a polishing portion on which a coupling protrusion is formed,

Wherein both side walls of the engaging groove are formed with a seating step,

On both sides of the coupling protrusions, an inner wing portion to be seated on the seating jaw is protruded when the coupling protrusions rotate.

Further,

A body portion having a first connecting piece formed on an upper surface of the abrasive wheel and connected to an end of the engaging projection portion, and a polishing lip formed on a lower surface of the body portion and polishing the surface of the object to be polished .

A second connecting piece formed on an upper surface of the body and spaced apart from the first connecting piece by a predetermined distance, and a movable protrusion formed on an upper surface of the second connecting piece, the moving protrusion being spaced apart from the coupling protrusion by a predetermined distance, do.

Further, in the grinding wheel,

An auxiliary coupling groove spaced apart from the coupling groove by a predetermined distance and fitted with the movable projection,

A movement guide hole connected to one side of the auxiliary coupling groove and guiding the movement of the movable projection is formed to pass upward and downward,

The movement guide hole is formed in a curved shape so that the movable projection can move in a curved direction about the coupling projection.

In addition, a seating jaw is formed along the inner wall surface of the moving guide hole, on which the moving projection part is seated when the moving projection part moves.

The polishing apparatus according to the present invention has an effect that, when attaching / detaching a polishing unit to / from a polishing wheel, it is possible to attach and detach only by rotating the polishing unit by hand. This makes it possible to quickly and easily attach and detach the polishing part to the polishing wheel without a separate coupling tool such as bolts, nuts, and hammers, and to prevent the damage of the polishing part due to the impact.

When the grinding portion is mounted on the grinding wheel, the movement protrusion is caught by the end of the movement guide hole to restrict the rotation. Therefore, the direction in which the motor shaft of the driving portion is rotated is the same as the direction in which the grinding portion is mounted on the grinding wheel The polishing part mounted on the polishing wheel is not separated during the polishing operation.

1 is a side view showing a polishing apparatus according to the present invention;
2 is a perspective view showing a disassembled state of a polishing wheel and a polishing part applied to the polishing apparatus according to the present invention;
3 is a plan view showing a polishing wheel applied to a polishing apparatus according to the present invention.
FIG. 4 is a perspective view showing a state before a polishing part applied to a polishing apparatus according to the present invention is mounted on a polishing wheel. FIG.
5 and 6 are bottom views showing a process in which a polishing part applied to a polishing apparatus according to the present invention is mounted on a polishing wheel.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated with like reference numerals throughout the specification.

FIG. 1 is a side view showing a polishing apparatus according to the present invention, FIG. 2 is a perspective view showing a disassembly state of a polishing wheel and a polishing unit applied to the polishing apparatus according to the present invention, FIG. FIG. 4 is a perspective view showing a state before the polishing unit applied to the polishing apparatus according to the present invention is mounted on the polishing wheel, and FIGS. 5 and 6 are views showing a state where the polishing unit applied to the polishing apparatus according to the present invention Fig. 2 is a bottom view showing a process of mounting the wheel to a wheel.

1 to 6, a polishing apparatus 1 according to the present invention includes a base portion 10, a polishing wheel 20, and a polishing portion 30. As shown in FIG.

The base unit 10 includes a plurality of wheels 12 that are rolled along a ground along the bottom of the base unit 10. The base unit 10 includes a handle 13 for gripping an operator and controlling a moving direction do.

The base unit 10 includes a driving unit 11 for rotating a polishing unit 30, which will be described later, so that a polishing operation can be performed.

The driving unit 11 may be a general DC motor or an AC motor, and the motor shaft may rotate forward or reverse.

The base portion 10 described above is the same as that of the known electric grinding machine, and a detailed description thereof will be omitted.

The grinding wheel 20 may be formed in a disc shape having the same overall outer diameter, and a connecting hole 24 for connecting to the motor shaft of the driving unit 11 may be formed at a central portion of the grinding wheel 20, .

Here, the shape of the grinding wheel 20 is not limited to the disc shape, but may be formed in various shapes such as an elliptical shape and a polygonal shape.

The motor shaft is passed through the connection hole 24 at the upper part of the grinding wheel 20 and then the engaging member and the grinding wheel 20 abut against each other while fitting a ring- The motor shaft and the polishing wheel 20 can be stably connected.

When the power is applied to the driving unit 11 in a state where the grinding wheel 20 is coupled to the motor shaft, the grinding wheel 20 is rotated in the same direction as the motor shaft.

In addition, a coupling groove 21 for coupling with the polishing unit 30, which will be described later, is formed through the bottom of the polishing wheel 20.

The coupling grooves 21 may be spaced along the edge of the polishing wheel 20 so that a plurality of polishing portions 30 may be coupled to the polishing wheel 20.

In the present invention, the means for coupling the polishing unit 30 to the polishing wheel 20 is described as the coupling groove 21, but it is also possible to change the coupling hole 21 to a coupling hole.

The polishing unit 30 is divided into a body 31 and a polishing lip 32.

The body 31 is coupled to the bottom surface of the polishing wheel 20 and is parallel to the surface of the object to be polished. The body 31 may be formed in a disc shape having a substantially same overall outer diameter.

Here, the shape of the body 31 is not limited to a disc shape, but may be formed in various shapes such as an elliptical shape or a polygonal shape.

On the upper surface of the body part 31, a first connecting piece 33 connected to the coupling protrusion 34 is formed.

The end of the first connecting piece 33 may be welded to the central portion of the bottom surface of the coupling protrusion 34 and the coupling protrusion 34 may be welded to the coupling groove 21 of the polishing wheel 20. [ Respectively.

At this time, the first connecting piece 33 is formed in a circular shape and can be rotated in place between the mounting jaws 211 of the coupling groove 21 described later.

An inner wing portion 341 protruding from both sides of the first connecting piece 33 is formed on both sides of the coupling protrusion 34. Each end of the inner wing portion 341 is rounded The shape in which the coupling protrusions 34 and the inner wear wings 341 are combined becomes an elliptical shape.

The engaging groove 21 of the grinding wheel 20 is formed in a circular shape and a seating groove 211 is formed on both side walls of the inlet side where the engaging projection 34 of the engaging groove 21 is inserted .

At this time, since the interval between the seating jaws 211 is equal to the width of the coupling protrusion 34 or is slightly larger than the width of the coupling protrusion 34, the coupling protrusion 34 can easily pass therethrough have.

2, when the bottom surface of the grinding wheel 20 is viewed from the bottom surface due to the seating groove 211 formed in the engaging groove 21, the shape of the engaging groove 21 is an oval shape Lt; / RTI &

When the coupling protrusion 34 is inserted into the coupling groove 21 and then the body 31 or the abrasive lip 32 is rotated in one direction, as the coupling protrusion 34 is rotated, The abutting portion 341 is seated on the seating surface 211 of the engaging groove 21 so that the abrading portion 30 can be engaged with the abrasive wheel 20. [

Since the combined shape of the coupling protrusions 34 and the inner wear wings 341 has an elliptical shape as described above, the inner wear wings 341 may be formed in the course of the rotation of the body 31, The wing blade portion 341 can be continuously held in the mounting jaw 211 by being coupled to the mounting jaw 211 of the coupling groove 21.

The angle at which the coupling protrusions 34 are rotated may be about 60 to 90 degrees.

In addition, a second connecting piece 35 is formed on the upper surface of the body 31, and a moving projection 36 is formed on the upper surface of the second connecting piece 35.

The second connecting piece 35 is spaced apart from the first connecting piece 33 by a predetermined distance and is formed to have the same height as the first connecting piece 33.

At this time, the second connecting piece 35 is formed in a circular shape and can be moved between the seating jaws 231 of the movement guide hole 23 described later.

The movable protrusion 36 may be welded to the upper end of the second connection piece 35 and formed into a circular shape having a diameter larger than the diameter of the second connection piece 35.

The grinding wheel 20 has an auxiliary coupling groove 22 into which the moving projection 36 is inserted and a moving guide hole 23 which is connected to one side of the auxiliary coupling groove 22, do.

The auxiliary groove 22 is spaced apart from the coupling groove 21 by a predetermined distance and is formed in a circular shape. At this time, the diameter of the auxiliary engagement groove 22 is formed to be equal to or slightly larger than that of the movement projection 36, so that the movement projection 36 can be easily inserted into the auxiliary engagement groove 22 .

The moving guide hole 23 guides the movement of the movable projection 36. When the coupling projection 34 is rotated in the coupling groove 21, the movable projection 36 is engaged with the coupling projection 34 in the direction of the curved line.

A seating step 231 is formed along the inner wall surface of the moving guide hole 23 so that the edge of the moving projection 36 is seated when the moving projection 36 is moved.

At this time, the second connecting piece (35) moves along the empty space between the seating jaws (231) of the moving guide hole (23).

The abrasive grains 32 are formed on the bottom surface of the body portion 31 so as to be spaced apart from each other while polishing the surface of the abrasive object while being rotated together with the grinding wheel 20. [

Here, the object to be polished may be various indoor / outdoor materials such as concrete and stone such as marble, floor paint or urethane.

The abrasive rib 32 may be formed in an approximately oval shape. However, the shape of the abrasive rib 32 may be variously changed depending on the kind of the abrasive article.

The abrasive grains 32 are formed by mixing diamond powder with a metal powder such as iron, tungsten, cobalt and the like and then sintering the diamond powder to polish the surface of the object to be polished. The abrasive grains 32 are manufactured according to work environments such as concrete and marble Perform polishing or polishing operations.

Hereinafter, the operation of the present invention based on such a configuration and the unique effects generated in the process will be described.

5, the engaging protrusion 34 is inserted into the engaging recess 21 and the movable protrusion 36 is inserted into the auxiliary engaging recess 22, as shown in FIG. 5, when the grinding wheel 30 is to be mounted on the grinding wheel 20 The body portion 31 or the abrasive lip 32 is held by hand so that the movable projection 36 is moved toward the movement guide hole 23 as shown in FIG.

When the body portion 31 or the abrasive lip 32 is rotated, the end of the inner wing portion 341 is caught by the inner wall surface of the coupling groove 21 during the rotation of the coupling projection 34 The movement protrusion 36 moves in the curved direction along the movement guide hole 23 and is caught at the end of the movement guide hole 23. [ The inner wear wing 341 is seated in the seating groove 211 of the coupling groove 21 and the edge of the moving projection 36 is seated in the seating groove 231 of the moving guide hole 23, The polishing portion 30 is stably mounted on the polishing wheel 20. [

The grinding unit 30 is attached to the remaining engaging grooves 21 and the auxiliary engaging grooves 22 and the moving guide holes 23 and then the grinding wheel 20 is coupled to the driving unit 11 through the engaging member The polishing operation can be performed.

The rotation direction of the motor shaft of the driving unit 11 must be set to be the same as the direction in which the polishing unit 30 is mounted to the polishing wheel 20 so that the coupling protrusions 34 and the moving protrusions 36, Can be prevented from being separated from the coupling groove (21) and the auxiliary coupling groove (22).

On the contrary, when the polishing unit 30 is to be separated from the polishing wheel 20, the polishing wheel 20 is removed from the base unit 10, and then the movable projection 36 is moved to the auxiliary engagement groove 22 The body portion 31 or the abrasive lip 32 is held and rotated.

When the body portion 31 or the abrasive lip 32 is lowered down by hand, the engaging protrusion 34 comes out of the engaging recess 21 and the movable protrusion 36 comes into contact with the auxiliary engaging recess 22, So that the polishing portion 30 can be separated from the polishing wheel 20.

That is, in the polishing apparatus 1 according to the present invention, when the polishing unit 30 is mounted on or separated from the polishing wheel 20, the polishing unit 30 can be mounted and separated only by rotating the polishing unit 30 by hand, It is possible to quickly and easily attach and detach the polishing section 30 to the polishing wheel 20 without any separate coupling tool such as a nut, a hammer, or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

10: base part 11: driving part
12: Wheel 13: Handle
20: abrasive wheel 21: engaging groove
211, 231: seats 22: auxiliary coupling grooves
23: guide hole 24: connection hole
30: polishing section 31:
32: abrasive lip 33: first connecting piece
34: coupling protrusion 341: inner wear wing
35: second connecting piece 36: movable projection

Claims (5)

A base portion having a driving portion formed on one side thereof,
A grinding wheel connected to the driving unit and having a coupling groove formed on a bottom surface thereof,
A body portion having a coupling protrusion formed on an upper surface thereof and rotatably fitted in the coupling groove, a body having a first connection piece formed on an upper surface thereof to abut the lower surface of the polishing wheel and connected to an end of the coupling protrusion, A second connecting piece formed on an upper surface of the body and spaced apart from the first connecting piece by a predetermined distance; a second connecting piece formed on an upper surface of the second connecting piece, And a polishing part which is spaced apart from the polishing wheel and is composed of a moving projection part which is coupled to the polishing wheel,
Wherein both side walls of the engaging groove are formed with a seating step,
Wherein an inner wing portion is formed on both sides of the coupling projection to be engaged with the seating jaw when the coupling projection is rotated,
The combination of the coupling protrusions and the inner wear wings is of an elliptical shape so that the inner wear wings are fitted into the seating jaws of the coupling recesses during the rotation of the polishing unit, 60 to 90 degrees,
Wherein the grinding wheel is provided with an auxiliary engaging groove spaced apart from the engaging groove by a predetermined distance and inserted into the auxiliary engaging groove, and a moving guide hole guiding movement of the moving protrusion, And the movement guide hole is formed in a curved shape so that the movable projection can move in a curved direction about the coupling projection. delete delete delete The method of claim 1 ,
And a seating jaw is formed along the inner wall surface of the moving guide hole so that the moving projection is seated when the moving projection moves
Abrasive device.

Images