KR101411522B1 - Grinder - Google Patents

Abstract

A polishing apparatus is disclosed.
A polishing apparatus according to an embodiment of the present invention includes a first main frame; A wheel rotatably supporting the first main frame; A wheel assembly supporting the wheel and pivotally coupled to the first main frame; And a polishing unit rotatably coupled to the first main frame so as to selectively polish any one of a surface to be polished to which the wheel is contacted and a surface to be polished having different inclination from the surface to be polished.

Description

 [0001] DESCRIPTION [0002] GRINDER [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing apparatus, and more particularly, to a polishing apparatus for removing dust, stains, rust, and the like on the surface of a deck or tank of a ship.

In general, when the ship is dried and repaired, the paint is finally applied after polishing the deck having a large area. In particular, as the pre-treatment of the final painting, the polishing work is largely hand- to be.

As a grinding machine for polishing a deck or the like, an abrasive such as a grinding stone or a brush is usually combined with a hand grinder.

However, the above method has a problem that the worker must sit and work for a long time, and there is a problem that the worker is exposed to the dust generated during polishing.

In addition, since the ship's deck is made of an iron plate, the abrasive material is easily broken when the above-described equipment is applied, and the polishing process is very difficult when the surface to be polished is not flat such as bent or curved iron plate.

Further, when a small-diameter wheel is used due to the deck of a ship or various types of unevenness, it is difficult to achieve stable moving performance because it is difficult to pass over a step.

In addition, the mobile polishing apparatus of Patent Document is incapable of treating and managing the electric wire during movement and storage of the mobile polishing apparatus, since the electric wire that supplies power to the motor of the main body can not be housed in the mobile polishing apparatus itself.

Further, since the movable polishing apparatus of the patent document has the fixing hole formed at one end of the supporting part of the supporting part and the shaft bolt formed in the body of the polishing part simply inserted and rotatably fastened with the nut, the supporting part and the polishing part are fastened so as to be rotatable only with the nut Since the movement is restrained only in the direction perpendicular to the longitudinal direction of the shaft bolt, when the bottom surface of the support portion and the bottom surface of the polishing portion have mutually different inclination, the torsional load The shaft bolt and the bolt are not applied to the shaft bolt and the fixing bolt, and even if the supporting part is brought into close contact with the bottom surface, the polishing part can not be brought into close contact with the bottom surface having a relatively inclination.

Published Patent Application No. 10-2011-0056610

The present embodiment can provide a polishing apparatus capable of performing the polishing operation of the deck of a ship more conveniently and efficiently, thereby improving the productivity and economy.

In addition, the present embodiment can provide a polishing apparatus in which the second main frame, in which the first turning shaft is removed compared to the first main frame, and the second main frame and the polishing unit are connected to the clearance joint portion.

According to an aspect of the present invention, there is provided a display device comprising: a first main frame; A wheel rotatably supporting the first main frame; A wheel assembly supporting the wheel and pivotally coupled to the first main frame; And a polishing unit rotatably coupled to the first main frame so as to selectively polish any one of a surface to be polished to which the wheel is contacted and a surface to be polished having a different inclination from the surface to be polished Can be provided.

A first pivot shaft for rotatably coupling the first main frame and the wheel assembly; And a second pivot shaft for rotatably coupling the first main frame and the polishing unit.

The first rotating shaft and the second rotating shaft may be provided in directions orthogonal to each other.

In the coordinate system in which the extending direction of the X-axis is the advancing direction of the polishing apparatus, the extending direction of the Y-axis is the direction perpendicular to the polishing target surface and the extending direction of the Z-axis is a direction perpendicular to the XY plane, And the polishing unit is rotatable on an XY plane around the second rotating shaft.

The first main frame includes a pair of connecting bars hinged to a hinge portion protruding from the upper portion of the polishing unit. The wheel assembly is supported at both ends of the wheel by rolling on the wheels, Wherein the first turning axis is arranged to engage the connecting beam and the first main frame, and the second turning axis is arranged to be coupled to the pair of connecting bars and the polishing unit .

According to another aspect of the present invention, there is provided a display device comprising: a second main frame; A wheel mounting portion fixed to the rear inclined portion of the second main frame to allow the second main frame to roll along the surface to be polished, the wheel mounting portion being disposed perpendicularly to the longitudinal direction of the second main frame; Wheels mounted on both ends of the wheel mounting portion; A polishing unit hinged to the second main frame so as to selectively polish any one of a surface to be polished to which the wheel is contacted or a surface to be polished having a different inclination from the surface to be polished; And a clearance joint portion provided between the second main frame and the polishing portion and imparting pivoting and shaking.

The second main frame may include a pair of connecting bars hinged to the hinge protruding from the upper portion of the polishing unit, each having a shaft coupling hole; A rear inclined portion provided on the second main frame opposite to the connecting bar; And a mounting portion coupling groove provided in an oblique direction between the rear inclined portion and the bottom portion of the second main frame.

The wheel mounting portion may include a center plate having the wheel coupled to the bottom surface of the plate and the upper surface of the plate being in close contact with the rear inclined portion; A side plate bent at one side of the center plate so as to fit into the mounting portion coupling groove; And a side plate bent at the other side of the center plate to contact the end of the second main frame.

The clearance joint portion may include a hollow body having an outer circumferential surface having a clearance with respect to the axial coupling hole of the connecting bar, having a thread on an inner circumferential surface thereof, and inserted into the axial coupling hole; And a rim having a bolt seating space penetrating the hollow body and protruding to have a larger diameter than an outer circumferential surface of the hollow body, and being fastened to the hinge by a bolt so as to be rotatable or swingable .

Further, the wheel may have a diameter larger than the thickness of the second main frame.

As described above, according to the polishing apparatus according to an embodiment of the present invention, even when the surface to be polished such as the deck of the ship is bent, the polishing unit can move correspondingly and efficiently, Even if you work a long time, you can reduce the fatigue of the worker and guarantee the long service life of the grinder.

According to another embodiment of the present invention, there is provided a second main frame similar to the first rotating shaft of the first embodiment, wherein the second main frame is provided with a wheel mounting portion, As the second wheel is mounted on the wheel mounting portion, there is an advantage that stable movement and manipulation performance can be provided.

Further, according to another embodiment of the present invention, a clearance joint portion is provided on a second pivotal shaft to which a connecting bar and a polishing portion of the second main frame are connected, so that the connecting bar and the polishing portion of the second main frame have relative movement There is an advantage that a stable adhesion performance can be provided in correspondence with the upper and lower steps of the working surface or the curvature of the inclined surface or the like.

1 is a left side view of a polishing apparatus according to a first embodiment of the present invention;
Fig. 2 is a front view of Fig. 1; Fig.
Fig. 3 is a plan view of Fig. 1;
4 is an enlarged view of the "A" area of Fig. 1;
5 is an enlarged cross-sectional view of the area "B" of Fig. 1;
6 is a first operational view of a polishing apparatus according to a first embodiment of the present invention; And
7 is a second operational view of the polishing apparatus according to the first embodiment of the present invention,
8 is a perspective view of a polishing apparatus according to a second embodiment of the present invention; And
9 is an enlarged cross-sectional view taken along the line CC of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known publication configurations or functions will be omitted when it is determined that the gist of the present invention may be obscured.

First Embodiment

FIG. 1 is a left side view of a polishing apparatus according to a first embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a plan view of FIG.

1, a polishing apparatus 1 according to a first embodiment of the present invention includes a first main frame 100, a wheel assembly 200, a driving unit 300, and a polishing unit 400 Lt; / RTI >

The first main frame 100 may form the main body of the polishing apparatus 1 on which the wheel assembly 200, the driving unit 300 and the polishing unit 400 are mounted. The first main frame 100 may have a handle 110 installed at a predetermined height so that an operator can hold the grinding apparatus 1 and perform a polishing operation in a linear state.

The height of the handle 110 may be designed to be high enough to allow the worker to work with the waist in a loose state or to be arbitrarily adjustable in height according to the height of the worker.

Therefore, the polishing apparatus 1 of the present invention can operate the apparatus in a standing state with ease, so that the worker is less fatigued even when the apparatus is operated for a long period of time. As shown in FIG. 2, the handle 110 may have a bar shape so that the operator can hold the handle 110 with both hands.

An operation button 120 for applying power and operation of the polishing apparatus 1 may be mounted on one side of the handle 110 or in an extension bar 130 described later in the second embodiment.

The first main frame 100 includes an extension bar 130 connected to the handle 110 and disposed on an upper portion of a wheel assembly 200 to be described later and a support portion 130 for rotatably supporting the wheel assembly 200 140 and a pair of connecting bars 150 and 160 disposed on the upper part of the polishing unit 400 to be described later. The handle 110, the extension bar 130, the support portion 140 and the connection bars 150 and 160 of the first main frame 100 may be separately manufactured and joined together or may be integrally manufactured.

As shown in FIGS. 1 and 3, the extension bar 130 may have a bar shape that is bent in a combination of a vertically arranged portion and a horizontally arranged portion. A handle 110 may be formed on one side of the extension bar 130 and the other side of the extension bar 130 may be coupled to the support 140.

The support portion 140 may have a plate shape disposed along a direction parallel to the XZ plane, and may have an appropriate size to allow the wheel assembly 200 to be rotatably coupled to the one side surface. One side of the support part 140 may be connected to the extension bar 130 and the connection bars 150 and 160 may extend to the other side of the support part 140.

As shown in FIG. 3, the connecting bars 150 and 160 may be spaced apart from each other at both ends of the supporting part 140. For example, the connection bars 150 and 160 may be formed in parallel along the X-axis direction. The pair of connecting bars 150 and 160 may be hinged to the polishing unit 400 to be described later to be rotatable. Hinge parts 401 and 402 may be formed on both sides of the polishing part 400 so as to be hinged to the connecting bars 150 and 160.

4, the wheel assembly 200 includes first and second wheels 220 and 230 that rotate while contacting the surface to be polished 5, 220, and 230, and a connecting beam 210 rotatably coupled to the first main frame 100.

Here, the surface 5 to be polished is a surface made of an iron plate such as a deck or a tank of a ship. It mainly includes a flat surface such as an XZ plane coordinate or a portion bent or curved in the Y-axis. Can be used to mean.

The wheel assembly 200 allows the polishing apparatus 1 to move along the surface 5 to be polished while the first main frame 100 is rotatably supported on the surface 5 to be polished. The first wheels 220 and 230 included in the wheel assembly 200 may be in the form of a single roll in contact with the surface 5 to be polished and may be formed in a plurality of tires. For example, as shown in FIG. 2 and FIG. 3, the first wheels 220 and 230 may be provided at both ends of the coupling beam 210 so as to be spaced apart from each other.

The connecting beams 210 may be formed of plates to rotatably support the first wheels 220 and 230 described above. The connecting beams 210 are positioned on the first wheels 220 and 230 and one side of the connecting beams 210 can be rotatably supported on the first main frame 100. In the first embodiment, the connecting beam 210 is formed of a rectangular plate. However, the connecting beam 210 is not limited to the shape but may be formed in various shapes.

4, the upper portion of the connecting beam 210 is positioned below the extended bar 130 of the first main frame 100 and the side surface of the connecting beam 210 is positioned on the main frame 100, As shown in FIG.

Here, a first pivot shaft 500 for pivotally coupling the first main frame 100 and the wheel assembly 200 may be installed. The first coaxial shaft 500 is rotatably coupled to the support beam 140 of the first main frame 100 and the coupling beam 210 of the wheel assembly 200. For example, as shown in FIG. 3, the first coaxial shaft 500 may be provided in parallel with the X-axis direction so as to couple the side central region of the coupling beam 210 and the support unit 140.

Referring to FIG. 6, which is a first operation diagram of the polishing apparatus according to the first embodiment of the present invention, the first main frame 100 and the first main frame 100, which are installed in the X- The first main frame 100 rotatably coupled to the wheel assembly 200 when the one side of the surface to be polished 5 is inclined in the Y axis direction from the Z axis direction due to the coupling structure of the assembly 200, It can be operated to turn right and left in the YZ plane.

That is, the first main frame 100 does not move integrally with the wheel assembly 200, and the polishing unit 400 coupled to the first main frame 100 can maintain a horizontal position with respect to the polishing surface 5 . The first main frame 100 and the polishing unit 400 can move differently from the wheel assembly 200 and the polishing unit 400 can be moved even if the polishing target surface 5 on which the wheel assembly 200 is located is not flat. The polishing surface 5 can be smoothly polished.

The polishing unit 400 is mounted with the driving unit 300 and rotatably coupled to the first main frame 100 to polish the surface 5 to be polished. Here, the driving unit 300 may include a driving motor (not shown) to electrically operate the polishing unit 400. The driving unit 300 and the polishing unit 400 may be integrally combined. For example, the driving unit 300 may be mounted on the polishing unit 400.

The polishing unit 400 is rotatably coupled to the first main frame 100 and may be coupled to a pair of connection bars 150 and 160 of the first main frame 100. To this end, a second turning shaft 600 may be provided for pivotally connecting the connecting bars 150 and 160 of the first main frame 100 and the polishing unit 400.

The second coaxial shaft 600 may be provided in a pair so as to be coupled to the pair of connecting bars 150 and 160 and the polishing unit 400. The second coaxial axes 600 may be inserted into the connecting bars 150 and 160 arranged in the X-axis direction while being arranged in the Z-axis direction. Hinge parts 401 and 402 may be formed on the polishing part 400 to be hinged to the connection bars 150 and 160.

For example, the hinge portions 401 and 402 may have an axial coupling hole as a bracket member protruding (Y-axis direction) in a pair on the upper portion of the polishing portion 400 as shown in FIGS. 1 and 3 The second pivot shaft 600 can be engaged with the other pivot shaft of the connecting bars 150 and 160 and the shaft coupling holes of the hinge portions 401 and 402 through the corresponding shaft coupling holes .

In the first embodiment of the present invention, hinge portions 401 and 402 having a pair of connecting bars 150 and 160 and a pair of shaft coupling holes are connected to the second rotating shaft 600 Respectively. However, the present invention is not limited thereto and can be variously implemented. For example, if the polishing unit 400 is a connecting bar that can be pivotably connected to the first main frame 100, the connecting bars 150 and 160, the hinge units 401 and 402, It is possible to replace the rotary shaft 600, and this can also be included in the technical idea of the present invention.

Referring to FIG. 7, which illustrates a second operation diagram of the polishing apparatus according to the first embodiment of the present invention, the first main frame 100 and the polishing unit 400, which are formed by the second rotating shaft 600, Axis direction along the X axis direction of the wheel assembly 200 due to the coupling structure of the wheel assembly 200, the polishing unit 400 rotates in the XY plane in the left-right direction Can operate. Therefore, the polishing unit 400 does not move integrally with the first main frame 100 and can move so as to be parallel to the inclined surface 5 to be polished. Accordingly, the polishing unit 400 can smoothly perform the polishing work on the surface 5 to be polished, which is located at a different height from the surface 5 to be polished where the wheel assembly 200 is located.

5, the polishing unit 400 includes a cover 410, a rotating shaft 420, a bracket 430, a polishing member 430, (440), and a departure prevention part (450).

The cover 410 supports the above-described driving unit 300 and may have a space portion 405 therein. A rotating shaft 420, a bracket 430, an abrasive member 440, and the like may be mounted on the space portion 405. The space portion 405 may serve to move foreign substances such as dust, dust, rust, etc., generated from the object surface 5 to be polished during a polishing operation to a dust collector (not shown) A moving passage 480 may be formed. Therefore, it is possible to protect the operator from dust, rust, and other foreign materials generated during the polishing operation, thereby enabling the operator to carry out the polishing operation in a pleasant and safe environment.

The dust collector moving passage 480 is connected to the dust collector through a vacuum hose or the like, and the dust collector may be provided with a filter or a cyclone to collect foreign substances.

The rotating shaft 420 can be rotated by the driving unit 300 inside the cover 410. That is, the rotating shaft 420 may be connected to the driving unit 300, and may be directly connected to the driving unit 300 or may be connected by various couplings (not shown). The rotating shaft 420 may be configured as a rotating shaft assembly including a bearing that supports a spindle or spindle.

The bracket 430 can rotate inside the cover 410 while being coupled with the rotation shaft 420. The bracket 430 may have a disk-like plate shape, and the polishing member 440 performing the polishing operation may be configured in a module form. That is, the bracket 430 can be detachably coupled with the cover 410 through the bolt 460 and the washer 470, so that when the abrasive member 440 is worn, replacement with a new product can be facilitated.

The polishing member 440 is coupled to the bracket 430 and rotates inside the cover 410 to polish the surface 5 to be polished. As described above, the abrasive member 440 can constitute a replaceable module together with the bracket 430.

The abrasive member 440 includes an elastic blade 441 curved toward the surface 5 to be polished, an abrasive 443 coupled to the elastic blade 441 and in contact with the surface 5 to be polished, And a thin steel plate 445 coupled to the unbonded elastic blade 441.

The elastic wings 441 may be formed of a plurality of elastic wings. For example, the elastic wings 441 may comprise a rubber material having an appropriate elastic force. Therefore, since the elastic blade 441 has a curved shape with elasticity, the surface area with the surface 5 to be polished can be widened during the polishing operation, and even if the surface 5 to be polished is not flat, So that the polishing efficiency can be increased as a whole.

The abrasive 443 coupled to the elastic blade 441 can prevent the abrasive member 440 from being worn in friction with the abrasive surface 5 made of an iron plate, thereby prolonging the service life and enhancing the polishing efficiency. In this embodiment, the abrasive 443 may be a high-hardness diamond material, but is not limited thereto.

The release preventing portion 450 may be configured to enclose the abrading member 440 inside the cover 410 to prevent the abrading member 440 from being detached outward. For example, the release preventing portion 450 may include a coupling ring that surrounds an edge region of the bracket 430. An abrasive 453 may be coupled to the coupling ring so as to perform polishing of the surface 5 to be polished together with the polishing member 440.

As described above, according to the polishing apparatus of the present invention, even when the surface to be polished such as the deck of a ship is curved, the polished portion can be polished efficiently while moving correspondingly, and even if the polished surface is polished, The fatigue can be reduced and the long life of the grinder can be guaranteed.

Of course, the present invention is not necessarily limited to marine applications, and may be applicable to grinding operations of buildings and other materials other than vessels.

Second Embodiment

The polishing apparatus of the present invention described in this embodiment has a wheel mounting portion provided in a second main frame, a second wheel having a diameter larger than the thickness of the second main frame, and a second wheel connecting and disengaging the connecting bar and the polishing portion of the second main frame And a handle provided on the polishing unit for use in transportation and storage, as shown in Fig. 4 (a). Therefore, the same or corresponding components in Figs. 1 to 9 will be given the same or similar reference numerals, and a description thereof will be omitted here.

FIG. 8 is a perspective view of a polishing apparatus according to a second embodiment of the present invention, and FIG. 9 is an enlarged cross-sectional view taken along line C-C of FIG.

8, the polishing apparatus 1a according to the second embodiment of the present invention mainly includes a second main frame 100a, a wheel mounting unit 109, a second wheel 240, a driving unit 300, And a polishing unit 400.

The second main frame 100a includes a pair of connecting bars 150 and 160 hinged to the hinge portions protruding from the upper portion of the polishing unit 400 and each having a shaft coupling hole, A rear inclined portion 170 provided on the second main frame 100a opposite to the first inclined portion 170 and a bottom portion 101 of the second main frame 100a; And may have an engaging groove 108.

The wheel mounting portion 109 may be fixedly attached to the rear inclined portion 170 of the second main frame 100a so as to rollably support the second main frame 100a along the surface to be polished.

At this time, the wheel mounting portion 109 may be disposed perpendicular to the longitudinal direction of the second main frame 100a.

The wheel mounting portion 109 includes a center plate 109a to which the second wheel 240 is coupled to the bottom surface of the plate and whose upper surface of the plate is in close contact with the rear inclined portion 170, One side plate 109b bent at one side of the plate 109a and one side plate bent at the other side of the center plate so as to contact the end of the second main frame 100a.

The second wheel 240 can be installed to be rotatable based on the bottom surface of both end portions of the wheel mounting portion 109, that is, the bottom surface of the center plate 109a.

At this time, the second wheel 240 may have a diameter D larger than the thickness H of the second main frame 100a.

That is, it is preferable that the second wheel 240 is installed in the second main frame 100a as far as possible from the polishing unit 400, Is relatively large in comparison with the first wheel of the first embodiment, so that it is possible to easily ride various bends or steps that may be formed on the surface to be polished.

However, due to limitations such as the weight reduction of the apparatus and the connection structure between the polishing unit 400 and the second main frame 100a, the diameter D of the second wheel 240 is set to be smaller than the diameter D of the first When the wheel is made larger than the wheel, the height of the wheel is increased, which may make it difficult to connect the components and increase the weight.

In order to solve both of the problem and the lightening requirement, a downwardly inclined wheel mounting portion 109 can be provided in the second embodiment, so that a relatively large diameter D, for example, A second wheel 240 having a diameter D larger than the first wheel of the example or larger than the thickness H of the second main frame 100a may be provided.

Since the diameter of the second wheel 240 is greater than the thickness H of the second main frame 100a or the first wheel of the first embodiment, the road surface impact absorbing force and cornering can be improved, It is possible to help balance the weight of the paper 400 and move smoothly beyond the jaw of the paper.

The polishing unit 400 is provided with connection bars 150 and 160 of the second main frame 100a and polishing units 400 and 400 so as to polish the surface to be polished, The connecting bars 150 and 160 can be hinged to each other via the joint joint 610 between the hinge portions 404 of the connecting bars 150 and 160.

That is, the polishing unit 400 may be configured to selectively polish either the polishing surface to which the second wheel 240 is contacted or the polishing surface having a different inclination from the polishing surface, As shown in FIG.

Here, the playout joint portion 610 may serve to fasten the connecting bars 150 and 160 to the hinge portion 404 so as to be able to rotate or shake.

In other words, in the second embodiment, the clearance joint portion 610 corresponding to the curved surface of the ship deck, that is, various surfaces to be polished is provided so that the polishing portion 400 is swung toward the polishing portion 400, It is possible to prevent the handle 110 from being excessively inclined.

9, the free joint portion 610 has an outer peripheral surface having a clearance G with respect to the axial coupling hole 155 of the connecting bars 150 and 160 and has a thread on the inner peripheral surface thereof, A hollow body 611 to be inserted into the hollow body 611 and a rim 612 having a bolt seating space penetrating the hollow body 611 and having a larger diameter than the outer circumferential surface of the hollow body 611 have.

At this time, the hollow body 611 can be inserted into the shaft coupling hole 155 of the coupling bars 150 and 160 and the shaft coupling hole of the hinge portion 404.

The bolt 620 may be inserted into the rim portion 612 and then coupled to the thread of the inner circumferential surface of the hollow body 611 and the screw hole of the hinge portion 404.

8 or 9, in the coordinate system in which the extending direction of the X-axis is the traveling direction of the polishing apparatus, the extending direction of the Y-axis is the direction perpendicular to the surface to be polished, and the extending direction of the Z- The polishing part 400 can be rotated on the XY plane by the hinge part and can be rotated on the YZ plane by the play joint part 610. [

The second main frame 100a may include a pair of fixing plates 130a protruding from the upper surface of the second main frame to the upper side of the wheel mounting portion 109. [

At this time, the extension bar 130 fixes one end of the extension bar 130 between the fixing plates 103a and extends obliquely to the upper side of the second main frame 100a, and the other end of the extension bar 130 And a handle 110 protruding from both sides.

The operation button 120 collectively refers to a box-type button assembly or a switch device and is installed on the extension bar 130 and may serve to apply power and operation of the polishing apparatus 1a to the driving unit 300 have.

The polishing apparatus 1a according to the second embodiment includes a pair of fore and aft discharge portions (not shown) protruding from one surface and the other surface of the extension bar 130 so as to wind and store a wire extending from the operation button 120 135).

In other words, the operator can keep the wires wrapped around the pair of fore-and-aft charging parts 135, or disconnect the wires from the front charging part 135 and connect them to the power source.

The polishing unit 400 may further include a polishing device transport handle 490 disposed on the polishing unit.

The operator can grip the handle 110 or the extension bar 130 with one hand and easily grip the handle 490 with the other hand.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

1, 1a: a polishing apparatus 100: a first main frame
100a: second main frame 109: wheel mounting portion
110: Handle 120: Operation button
130: Extension bar 135: All players paid
140: support part 150, 160: connection bar
200: wheel assembly 210: connecting beam
220, 230, 240: wheel 300:
400: polishing section 401, 402, 404: hinge section
405: space part 410: cover
420: rotating shaft 430: bracket
440: abrading member 441: elastic blade
443: abrasive 445: thin steel
450: separation prevention part (coupling ring) 453: abrasive
460: Bolt 470: Washer
480: dust collector connection passage 490: handle
500: first coaxial shaft 600: second coaxial shaft
610: Free joint part 620: Joint bolt

Claims (10)

A first main frame;
A wheel rotatably supporting the first main frame;
A wheel assembly supporting the wheel and pivotally coupled to the first main frame;
A polishing unit rotatably coupled to the first main frame so as to selectively polish any one of a surface to be polished to which the wheel is contacted and a surface to be polished having different inclination from the surface to be polished;
A first pivot shaft for rotatably coupling the first main frame and the wheel assembly; And
And a second pivotal shaft rotatably coupling the first main frame and the polishing unit.
delete The method according to claim 1,
Wherein the first rotating shaft and the second rotating shaft are provided in directions perpendicular to each other.
The method of claim 3,
In the coordinate system in which the extending direction of the X-axis is the moving direction of the polishing apparatus, the extending direction of the Y-axis is the direction perpendicular to the surface to be polished, and the extending direction of the Z-
The wheel assembly is rotatable on the YZ plane about the first pivot axis,
Wherein the polishing unit is capable of rotating on an XY plane around the second rotating shaft.
The method according to any one of claims 1, 3, and 4,
Wherein the first main frame includes a pair of connection bars hinged to a hinge portion protruding from the upper portion of the polishing portion,
Wherein the wheel assembly includes a connecting beam rotatably supported on the wheels at both ends thereof and rotatably supported by the first main frame,
Wherein the first rotation axis is arranged to engage the connection beam and the first main frame,
And the second rotating shaft is arranged to be coupled to the pair of connecting bars and the polishing unit.
A second main frame;
A wheel mounting portion fixed to the rear inclined portion of the second main frame to allow the second main frame to roll along the surface to be polished, the wheel mounting portion being disposed perpendicularly to the longitudinal direction of the second main frame;
Wheels mounted on both ends of the wheel mounting portion;
A polishing unit hinged to the second main frame so as to selectively polish any one of a surface to be polished to which the wheel is contacted or a surface to be polished having a different inclination from the surface to be polished; And
And a clearance joint portion provided between the second main frame and the polishing portion, the clearance joint portion imparting rotation and shaking.
The method according to claim 6,
Wherein the second main frame comprises:
A pair of connecting bars hinged to a hinge protruding from the upper portion of the polishing unit and each having a shaft coupling hole;
A rear inclined portion provided on the second main frame opposite to the connecting bar; And
And a mounting portion coupling groove provided in an oblique direction between the rear inclined portion and the bottom portion of the second main frame.
8. The method of claim 7,
The wheel-
A center plate coupled to the bottom of the plate, the top plate being in close contact with the rear slope;
A side plate bent at one side of the center plate so as to fit into the mounting portion coupling groove; And
And one plate bent at the other side of the center plate to come in contact with an end of the second main frame
Abrasive device. 8. The method of claim 7,
Wherein the clearance joint portion
A hollow body having an outer circumferential surface having a clearance with respect to the axial coupling hole of the connecting bar and having a thread on the inner circumferential surface and inserted into the axial coupling hole; And
And a rim having a bolt seating space penetrating the hollow body and protruding to have a larger diameter than an outer circumferential surface of the hollow body, wherein the rim is coupled to the hinge by a bolt so that the connecting bar is pivotally or swingably coupled. .
10. The method according to any one of claims 6 to 9,
The wheel,
Wherein the second main frame has a diameter larger than the thickness of the second main frame.

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