JP2006026840A - Coating film removing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating film removing device, preventing unexpected self-running when a grinding part is abutted on a coating film surface, easily controlling the grinding quantity, grinding and removing only the film on the panel surface to be flat without ruggedness without damaging a soft undercoat layer such as an ALC panel, and easily grinding and removing a coating film in a joint groove along the panel joint groove. <P>SOLUTION: In this device, in front and in the rear of a device A of a grinding part 2 in the operating direction, the tip part 3a of a supporting rotor 3 is disposed to project on substantially the same straight line as the projected tip part 2a of the grinding part 2 or above it. The supporting rotor 3 is supported by a frame 4 at least partially formed of an elastic body, and while the grinding part 2 is driven in rotation, the grinding part 2 is pressed to the panel 1 surface against the elastic force of the frame 4, and simultaneously the device A is moved in the operating direction to thereby grind and remove the film on the panel 1 surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coating film removing apparatus for removing a coating film on a panel surface.

  When repainting the painted surface, the old paint film may need to be peeled off, but the surface paint film such as ALC (lightweight cellular concrete) panel that is softer than the paint film hardness may be damaged. It was difficult to peel off without using a commercially available general tool.

  For example, when a sander or grinder is used, the disc-shaped grinding part hits the panel surface diagonally, so in the case of a soft material such as an ALC panel, the substrate is scraped diagonally and a step is formed on the surface. Arc-shaped cutting traces may remain. In addition, it was difficult to finish the panel surface flatly because the degree of shaving greatly fluctuated due to the force applied.

  Also, when scraping the panel joint groove with a groove router, it is necessary to fix the ruler to the panel surface with a nail or the like in advance because the joint width becomes uneven or meanders. There was a problem that it took time and effort.

  Japanese Utility Model Laid-Open No. 5-12076 (Patent Document 1) proposes a paint peeling apparatus having a structure in which an abrasive belt is wound between rollers having an outer ring as an elastic material, and the base is FRP (fiber reinforced plastic). It is said that a coating film made of a material that is easily damaged can be uniformly and smoothly peeled off.

Japanese Utility Model Publication No. 5-12076

  However, the technique disclosed in Patent Document 1 has the following problems when the polishing surface of the polishing belt that protrudes from the apparatus and always rotates contacts the coating surface.

(1) Since the frictional resistance between the polishing surface of the polishing belt and the coating surface is large, there is a possibility that the device may inadvertently run at the moment when the polishing surface of the polishing belt contacts the coating surface. It was necessary to be careful when touching.

(2) There is a problem that the polishing is started at the same time as the polishing surface of the polishing belt is brought into contact with the coating surface, and it is difficult to adjust the polishing amount.

(3) Since the polishing belt is a flexible material and the polishing layer is thin, when it is used for removing a coating film such as an ALC panel, it is necessary to replace the polishing belt frequently because it wears quickly.

  The present invention solves the above-mentioned problems, and the object is to prevent the device from inadvertently self-propelling when the grinding part comes into contact with the coating surface and to easily adjust the grinding amount. , Able to grind and remove only the paint film on the panel surface without unevenness without damaging the soft substrate like ALC panel, and to easily remove the paint film on the joint groove along the panel joint groove It is intended to provide a coating film removing device that can also be used.

  A first configuration of a coating film removing apparatus according to the present invention for achieving the above object is a coating film removing apparatus for removing a coating film on a panel surface, comprising: an electric rotary grinding unit; and A plurality of support rotators arranged so that the front ends protrude in front and rear directions of the apparatus and substantially on the same straight line as or more than the protruding front end of the grinding part, and support the support rotary body and at least partly elastic A frame constituted by a body and moving the device in an operation direction while pressing the grinding part against the panel surface against the elastic force of the elastic body while rotating the grinding part. The surface coating film is removed by grinding.

  Further, a second configuration of the coating film removing apparatus according to the present invention is that, in the first configuration, the grinding unit is disposed in a direction in which a rotation center axis thereof is parallel to the panel surface and intersects the apparatus operation direction. The cylindrical rotating body or the cylindrical rotating body is formed on at least a part of the outer peripheral surface of the cylindrical rotating body, and the supporting rotating body has a cylindrical rotation whose rotation center axis is parallel to the rotation center axis of the grinding part and has a predetermined width. It is characterized by comprising a body or a columnar rotator, or a wheel-shaped rotator arranged in plural with a predetermined interval.

  Further, a third configuration of the coating film removing apparatus according to the present invention is the first configuration, wherein the grinding unit is disposed in a direction in which a rotation center axis thereof is parallel to the panel surface and intersects the apparatus operation direction. Formed on the outer peripheral surface of the rotating body, and its outer shape has a cross-sectional shape corresponding to the cross-sectional shape of the panel joint groove, and the rotation center axis of the supporting rotating body is the rotation center axis of the grinding part. It is arranged in parallel and on the same straight line as the grinding part, the tip part is fitted into the panel joint groove, and at least a part of the outer peripheral surface of the tip part has a width that can contact the side face of the panel joint groove. It is characterized by comprising.

  Moreover, the 4th structure of the coating-film removal apparatus which concerns on this invention is a said 1st-3rd structure WHEREIN: The said support rotary body was arrange | positioned in series by several before and behind the apparatus operation direction of the said grinding part. It is characterized by.

  According to the first configuration of the coating film removing apparatus according to the present invention, when the supporting rotating body travels on the panel, the grinding part is a panel by a frame in which a part of the supporting rotating body is made of an elastic body. Since restoring force always works in the direction away from the surface, it will not be cut too much. Further, at the moment when the support rotating body is brought into contact with the panel surface, the grinding section is idled and grinding is not started, so that the apparatus does not run on its own and adjustment of the grinding condition at the start of grinding is easy.

  Further, according to the second configuration of the coating film removing apparatus according to the present invention, since the grinding portion is always maintained parallel to the panel surface by the support rotating body, the coating film on the panel surface is ground smoothly. Can be removed.

  Moreover, according to the 3rd structure of the coating-film removal apparatus which concerns on this invention, a part of outer peripheral surface of the front-end | tip part of a support rotary body has a width | variety which can contact | abut to the side surface of a panel joint groove, A support rotary body Can be run without meandering along the panel joint groove and without departing from the panel joint groove, and is arranged on the same straight line as the supporting rotating body, and the outer shape corresponds to the sectional shape of the panel joint groove. The coating portion of the panel joint groove can be surely ground and removed by the grinding part having the above, and it is not necessary to use a ruler or the like.

  Moreover, according to the 4th structure of the coating-film removal apparatus which concerns on this invention, when an apparatus moves across a panel joint groove | channel, in the 2nd structure, one support rotary body falls out to a panel joint groove | channel. However, since the other support rotating body runs on the panel surface and the grinding part is always maintained parallel to the panel surface, the coating film on the panel surface can be smoothly ground and removed. In the third configuration, even if one support rotator falls off into the recessed portion of the panel joint groove, another support rotator travels on the side surface of the panel joint groove and the apparatus can move smoothly without rattling. The coating portion of the panel joint groove can be ground and removed by the grinding portion.

  An embodiment of a coating film removing apparatus according to the present invention will be specifically described with reference to the drawings. FIG. 1 is an overall perspective view showing the configuration of a first embodiment of a coating film removing apparatus according to the present invention, FIG. 2 is an exploded perspective view showing the configuration of a grinding unit of the first embodiment, and FIG. FIG. 4 is a schematic explanatory view showing a state in which the apparatus is moved in the operation direction while pressing the grinding part against the panel surface against the elastic force of the elastic body, and FIG. It is a figure which shows an example of the height adjustment mechanism of a rotary body.

  First, the structure of 1st Embodiment of the coating-film removal apparatus concerning this invention is demonstrated using FIGS. The coating film removing apparatus A shown in FIGS. 1, 3 and 4 is configured as an apparatus for removing a coating film on a flat portion of the surface of the ALC (lightweight aerated concrete) panel 1, and a rotational driving force from a motor (not shown). The tip portion 3a protrudes before and after the operation direction a of the device A of the grinding portion 2 and the protruding tip portion 2a of the grinding portion 2 substantially on the same straight line or more. And a plurality of support rotating bodies 3 arranged in the manner described above.

  The grinding part 2 is formed on at least a part of the outer peripheral surface of the cylindrical rotating body or the columnar rotating body whose rotation center axis 2b is arranged in a direction parallel to the surface of the panel 1 and intersecting the operation direction a of the apparatus A. Has been. As shown in FIG. 2, the grinding unit 2 of the present embodiment includes a grinding tool 7 having a semicircular cross section.

  The grinding tool 7 is made of diamond, cubic boron nitride, SiC, and cemented carbide by a metal bond containing a Cu-based alloy as a main component on the downstream half of the rotation direction b of the grinding portion 2 of the outer peripheral surface 7a having a semicircular cross section. Abrasive grains 8 made of powder are bonded.

  A screw hole 5b is formed at the center of the pair of opposed flat portions 5a of the rotating drum 5, and a groove 5c parallel to the rotation center axis 2b is formed at the end of the flat portion 5a. On the other hand, a through hole 7 b is formed in the center of the grinding tool 7, and a projection 7 c is provided at the back side end of the grinding tool 7.

  Then, the projection 7c provided on the back surface side of the grinding tool 7 is fitted into the groove 5c of the rotating drum 5, and the bolt 6 is inserted into the through hole 7b and screwed into the screw hole 5b. Is attached to the rotary drum 5 in a detachable manner. Therefore, when the grinding part 2 of the grinding tool 7 is deteriorated, the bolt 6 can be removed and easily replaced with a new grinding tool 7.

  The outer peripheral surface 7a end of the grinding tool 7 and the outer peripheral surface end of the rotary drum 5 are formed with R surfaces or taper surfaces 7a1 and 5d so that the surface of the panel 1 is linearly ground by the grinding portion 2 and adjacent to each other. Stepped traces remain in the overlapped portion and do not stand out in a streak shape, and adjacent overlapped portions ground by a smooth R surface or tapered surface can be smoothly continued and flattened.

  A plurality of support rotating bodies 3 are arranged and supported in series before and after the operation direction a of the apparatus A of the grinding unit 2 by a frame 4 at least partially made of an elastic body. In the present embodiment, four frames 4 made of a leaf spring material or the like on both the left and right sides of the drum-shaped grinding part 2 are attached to the apparatus A main body, and the support rotating body 3 is rotatably supported on each frame 4. Is supported.

  The support rotator 3 may be constituted by a plurality of wheel-shaped rotators arranged at a predetermined interval as in this embodiment, but the rotation center axis thereof is parallel to the rotation center axis 2b of the grinding part 2. It may be constituted by a cylindrical rotating body or a columnar rotating body having a predetermined width. In the case where the supporting rotating body 3 is constituted by a cylindrical rotating body or a columnar rotating body, at least a part of the drum-shaped grinding part 2 is rotatably supported by a frame made of an elastic body before and after the same straight line, In addition, it is preferable that the drum-shaped grinding part 2 has a width equivalent to that of the drum-shaped grinding part 2.

  FIG. 5 is a view showing an example of a height adjusting mechanism of the support rotator 3. A holder 9 that rotatably supports the support rotator 3 with respect to the support portion 4 a fixed to the frame 4 extends along the slit 9 a. A tension spring 10 is stretched between the support portion 4 a and the holder 9. A height adjustment screw 15 inserted through a through hole 9b provided in the holder 9 is screwed into the screw hole 4b formed in the support portion 4a.

  As shown in FIG. 5A, when the height adjusting screw 15 is tightened, the support rotator 3 protrudes from the apparatus main body, and as shown in FIG. 5B, when the height adjusting screw 15 is loosened, the support rotator 3 Retracts to the main unit. As a result, the difference between the height level of the protruding tip 2a of the grinding part 2 and the height level of the tip 3a of the support rotating body 3 can be adjusted to be constant.

  Therefore, even if the type of the grinding tool 7 is changed, a certain pressing force is applied against the elastic force of the frame 4 by finely adjusting the height level of the support rotating body 3 by the height adjusting mechanism. The grinding thickness can be kept constant.

  As shown in FIG. 3, when the support rotating body 3 is in contact with the surface of the panel 1 and the grinding portion 2 is not pressed against the surface of the panel 1, the protruding tip 2 a of the grinding portion 2 is supported and rotated by the elastic force of the frame 4. The body 3 is held substantially on the same straight line as the tip 3a of the body 3 or at a height position that is retracted from the surface of the panel 1 more than that.

  As shown in FIG. 4, in a state where the grinding part 2 is pressed against the surface of the panel 1 against the elastic force of the frame 4, the grinding part 2 is pressed against the surface of the panel 1. Then, the apparatus A is moved in the operation direction a while the grinding part 2 is pressed against the surface of the panel 1 against the elastic force of the frame 4 which is an elastic body while the grinding part 2 is driven to rotate. The coating film can be removed by grinding.

  When the support rotator 3 travels on the surface of the panel 1 with the above configuration, the grinding part 2 is always in a direction away from the surface of the panel 1 by the frame 4 in which a part of the support rotator 3 is made of an elastic body. Since the restoring force works, it will not be cut too much. Further, at the moment when the support rotating body 3 is brought into contact with the surface of the panel 1, the grinding portion 2 is idled and grinding is not started, so that the apparatus A does not run on its own and the grinding condition at the start of grinding can be easily adjusted.

  Moreover, since the grinding part 2 is always maintained parallel to the surface of the panel 1 by the support rotating body 3, the coating film on the surface of the panel 1 can be ground and removed smoothly. Further, when the apparatus A moves across the panel joint groove formed in the ALC panel 1, even if one support rotating body 3 falls off into the panel joint groove, the other supporting rotating body 3 runs on the panel 1 surface. Thus, since the grinding part 2 is always kept parallel to the surface of the panel 1, the coating film on the surface of the panel 1 can be ground and removed smoothly.

  Next, the structure of 2nd Embodiment of the coating-film removal apparatus which concerns on this invention is demonstrated using FIGS. FIG. 6 is an overall perspective view showing the configuration of the second embodiment of the coating film removing apparatus according to the present invention, and FIGS. 7A and 7B are a front view and a side view showing the configuration of the grinding unit of the second embodiment. FIG. 7 (c) is a side cross-sectional explanatory view showing a state where the panel joint groove is ground by the grinding portion of the second embodiment, and FIG. 8 (a) is a schematic explanatory view showing a state where the apparatus is set in the panel joint groove. FIG. 8B is a schematic explanatory view showing a state in which the apparatus is moved in the operation direction while pressing the grinding portion against the panel surface against the elastic force of the elastic body, and FIG. 9 is a detachable support rotating body. It is a fragmentary sectional view showing an example of an attaching / detaching mechanism. In addition, what was comprised similarly to the said 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  The coating film removing apparatus B shown in FIGS. 6 and 8 is configured as an apparatus that removes the coating film of the panel joint groove 11 formed on the surface of the ALC panel 1 or the panel joint groove 11 between the adjacent ALC panels 1. An electric rotary grinding unit 12 to which a rotational driving force is transmitted from a motor (not shown), and before and after the operation direction a of the apparatus B of the grinding unit 12 and substantially the same as the protruding tip 12a of the grinding unit 12. It has a plurality of supporting rotating bodies 3 in which the tip portions 3a are arranged so as to protrude in a straight line or more.

  The grinding part 12 is formed on the outer peripheral surface of the rotating body 13 whose rotation center axis 12b is parallel to the surface of the panel 1 and intersects the operation direction a of the apparatus B, and the outer shape of the grinding part 12 is the panel joint groove 11. It has a cross-sectional shape corresponding to the cross-sectional shape.

  As shown in FIG. 7, the grinding unit 12 of the present embodiment is parallel to the rotation center axis 12 b of the rotating body 13 and the radial direction of the rotating body 13 over the entire outer periphery of the wheel-shaped rotating body 13. Sandpaper 14 which is a plurality of abrasive cloth pieces having the same tip shape as the cross-sectional shape of the panel joint groove 11 is fixed to the rotating body 13 by bonding with an adhesive.

  As shown in FIG. 8 (a), the rotation support shaft 3 of the present embodiment has a rotation center axis 3b parallel to the rotation center axis 12b of the grinding part 12 and collinear with the grinding part 2. The front end portion 3 a is fitted into the panel joint groove 11, and at least a part of the outer peripheral surface of the front end portion 3 a has a width that can contact the side surface 11 a of the panel joint groove 11.

  A plurality of support rotating bodies 3 are arranged and supported in series before and after the operation direction a of the apparatus B of the grinding unit 12 by a frame 4 at least partially made of an elastic body. In this embodiment, two frames 4 made of a leaf spring material or the like are attached to the apparatus B main body before and after the grinding portion 12, and the support rotating body 3 is supported by each frame 4 so as to be rotatable.

  As described above with reference to FIG. 5, the support rotating body 3 is configured so that its height can be adjusted by the height adjusting mechanism, and the type of the grinding portion 12 is selected in accordance with the joint width and cross-sectional shape of the panel joint groove 2. Even if the height is changed, the height adjustment mechanism finely adjusts the height level of the support rotator 3 so that a constant pressing force is applied against the elastic force of the frame 4 to keep the grinding thickness constant. Can be maintained.

  On the other hand, when the type of the grinding portion 12 is changed in accordance with the joint width and the cross-sectional shape of the panel joint groove 2, it is necessary to change the width of the support rotating body 3 at the same time. FIG. 9 shows an example of an attachment / detachment mechanism that detachably supports the support rotating body 3.

  In FIG. 9, a support shaft 16 is inserted through a through hole 9 c of a holder 9 having a U-shaped cross section, and a locking member 17 is fixed to an intermediate portion of the support shaft 16. A compression spring 18 fitted to the support shaft 16 is provided between the one piece 9 d provided with the through hole 9 c of the holder 9 and the locking member 17.

  As shown in FIG. 9A, the support rotating body 3 is rotatably attached to the end 16 a side of the locking member 17 of the support shaft 16, and the support shaft 16 of the support shaft 16 is compressed by the compression force of the compression spring 18. The end portion 16a is fitted into and supported by a bearing portion 9f provided on the other piece 9e of the holder 9.

  When changing the width of the support rotating body 3 at the same time when changing the type of the grinding part 12 in accordance with the joint width and cross-sectional shape of the panel joint groove 2, as shown in FIG. 9 is pulled to the left in FIG. 9 against the compressive force of the compression spring 18 so that the support rotator 3 can be detached from the support shaft 16 and another support rotator 3 is supported. By fitting the shaft 16 and releasing the knob 16b, the end portion 16a of the support shaft 16 is fitted and supported by the bearing portion 9f provided on the other piece 9e of the holder 9 by the compression force of the compression spring 18. The support rotating body 3 can be easily attached / detached by such an attaching / detaching mechanism.

  As shown in FIG. 8A, in the state where the support rotating body 3 is in contact with the side surface 11a of the panel joint groove 11 and the grinding part 12 is not pressed against the panel joint groove 11 side, the protruding tip part 12a of the grinding part 12 is The frame 4 is held on the substantially same straight line as the tip 3a of the support rotating body 3 by the elastic force of the support rotating body 3 or at a height position withdrawn from the panel joint groove 11 as shown in FIG. 8 (b). In the state where the grinding part 12 is pressed against the panel joint groove 11 side against the elastic force 4, the grinding part 12 is pressed against the side surface 11 a and the bottom surface 11 b of the panel joint groove 11.

  Then, while rotating the grinding part 12, the apparatus B is moved in the operation direction a while pressing the grinding part 12 against the panel joint groove 11 side against the elastic force of the frame 4 which is an elastic body. It is possible to grind and remove the coating on the graben 11 by gently stroking it.

  When the support rotator 3 travels in the panel joint groove 11 with the above configuration, the grinding part 12 is separated from the panel joint groove 11 by the frame 4 in which a part of the support rotator 3 is made of an elastic body. Since the restoring force always works, it will not be cut too much. In addition, at the moment when the support rotating body 3 is brought into contact with the side surface 11a of the panel joint groove 11, the grinding part 12 is idled and grinding is not started, so that the apparatus B does not self-propel and adjustment of the grinding condition at the start of grinding is possible. Easy.

  In addition, since a part of the outer peripheral surface of the tip 3a of the support rotator 3 has a width that can contact the side surface 11a of the panel joint groove 11, the support rotator 3 does not meander along the panel joint groove 11. Moreover, it is possible to run without deviating from the panel joint groove 11, which is arranged on the same straight line as the supporting rotating body 3 and whose outer shape has a cross-sectional shape corresponding to the cross-sectional shape of the panel joint groove 11. The coating film on the graben 11 can be reliably ground and removed, and a ruler or the like is not required as in the conventional example.

  Further, when the apparatus B moves across the panel joint groove 11, even if one support rotator 3 falls off into the recessed portion of the panel joint groove 11, the other support rotator 3 remains on the side surface of the panel joint groove 11. The apparatus B travels on the surface 11a and can move smoothly without rattling, and the coating portion of the panel joint groove 11 can be ground and removed by the grinding portion 12 with a certain thickness.

  Since the sealing material is provided in the panel joint groove 11 between the adjacent ALC panels 1 and the coating film on the surface of the sealing material is removed, the sealing material is scraped off in a hard grinding part such as a grindstone. Although it was difficult to remove the coating film, according to the sandpaper 14, which has flexibility as in this embodiment, the coating film on the surface of the sealing material is lightly stroked and gently ground to maintain and remove the sealing material easily. I can do it.

  Further, the grinding part 12 may be configured to be detachable so as to change the cross-sectional shape and width of the sandpaper 14 in accordance with the cross-sectional shape and width of the panel joint groove 11, and the support rotating body 3 is also a panel. In accordance with the cross-sectional shape and width of the joint groove 11, the cross-sectional shape and width can be changed.

  FIGS. 10A and 10B are a front view and a side view showing another configuration of the grinding portion of the second embodiment, and FIG. 10C is a panel joint groove formed by the grinding portion of the other configuration of the second embodiment. It is side surface explanatory drawing which shows a mode that is ground. In addition, what was comprised similarly to each said embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIG. 10, the grinding unit 12 of the present embodiment includes diamond, cubic boron nitride, and a metal bond mainly composed of a Cu-based alloy on the outer peripheral surface of the base material of the wheel-shaped rotating body 19 made of aluminum or the like. Abrasive grains 8 made of SiC and cemented carbide powder are bonded to each other, and the cross-sectional shape of the tip end portion 12 a is formed corresponding to the cross-sectional shape of the panel joint groove 11.

  The embodiment shown in FIG. 7 is effective for coating film grinding when the cutting speed is slow but the sealing material is present on the decorative joint, and the sealing material is present on the decorative joint in the present embodiment shown in FIG. In this case, it is unsuitable, but since the cutting speed is high, the work efficiency is excellent when coating the panel joint groove 11 where there is no sealing material. Other configurations are the same as those in the above embodiments, and the same effects can be obtained.

  The optimum thickness of the coating film to be ground using the coating film removing apparatuses A and B is about 0.5 mm to 3.0 mm, and the grinding amount (thickness) per time is about 0.00 mm. It is about 1 mm to 1.0 mm.

  As an application example of the present invention, the present invention can be used as a coating film removing apparatus for removing a coating film on an outer wall coating of an existing house.

It is a whole perspective view which shows the structure of 1st Embodiment of the coating-film removal apparatus which concerns on this invention. It is a disassembled perspective view which shows the structure of the grinding part of 1st Embodiment. It is a schematic explanatory drawing which shows the state which set the apparatus on the panel surface. It is a schematic explanatory drawing which shows a mode that an apparatus is moved to an operation direction, pressing a grinding part against the panel surface side against the elastic force of an elastic body. It is a figure which shows an example of the height adjustment mechanism of a support rotary body. It is a whole perspective view which shows the structure of 2nd Embodiment of the coating-film removal apparatus which concerns on this invention. (A), (b) is the front view and side view which show the structure of the grinding part of 2nd Embodiment, (c) is side surface explanatory drawing which shows a mode that a panel joint groove is ground by the grinding part of 2nd Embodiment. It is. (A) is model explanatory drawing which shows the state which set the apparatus to the panel joint groove | channel, (b) shows a mode that an apparatus is moved to an operation direction, pressing a grinding part against the panel surface against the elastic force of an elastic body. It is a schematic explanatory drawing shown. It is a fragmentary sectional explanatory view showing an example of an attachment / detachment mechanism which constitutes a support rotation body so that attachment or detachment is possible. (A), (b) is the front view and side view which show the other structure of the grinding part of 2nd Embodiment, (c) is a mode that a panel joint groove is ground by the grinding part of the other structure of 2nd Embodiment. It is side surface explanatory drawing which shows this.

Explanation of symbols

DESCRIPTION OF SYMBOLS A, B ... Coating-film removal apparatus 1 ... ALC panel 2 ... Grinding part 2a ... Projection front-end | tip part 2b ... Rotation center axis | shaft 3 ... Supporting rotary body 3a ... Tip part 3b ... Rotation center axis | shaft 4 ... Frame 4a ... Support part 4b ... Screw Hole 5 ... Rotating drum 5a ... Plane 5b ... Screw hole 5c ... Groove 5d ... R surface or taper surface 6 ... Bolt 7 ... Grinding tool 7a ... Outer peripheral surface
7a1 ... R surface or taper surface 7b ... through hole 7c ... projection 8 ... abrasive grain 9 ... holder 9a ... slit 9b, 9c ... through hole 9d ... one piece 9e ... other piece 9f ... bearing portion 9g ... long hole 9h ... through hole
10 ... Tension spring
11 ... Panel joint groove
11a ... side
11b ... Bottom
12 ... Grinding part
12a ... Projection tip
12b ... Rotation center axis
13 ... Rotating body
14 ... Sandpaper
15 ... Height adjustment screw
16 ... Spindle
16a ... end
16b ... pick
16c ... Flange
17 ... Locking member
18… Compression spring
19 ... Rotating body

Claims (4)

A coating film removing device for removing a coating film on a panel surface,
An electric rotary grinding unit;
A plurality of support rotators arranged so that the front ends protrude in front of and behind the device operating direction of the grinding section and substantially on the same straight line as or more than the protruding front end of the grinding section;
A frame that supports the supporting rotating body and at least a part of which is made of an elastic body;
Have
The paint film on the panel surface is ground and removed by moving the device in the operation direction while pressing the grinding part against the panel surface against the elastic force of the elastic body while rotating the grinding part. A coating film removing device. The grinding part is formed on at least a part of the outer peripheral surface of the cylindrical rotating body or the columnar rotating body, the rotation center axis of which is arranged in a direction parallel to the panel surface and intersecting the apparatus operation direction,
The support rotator is a cylindrical rotator or a columnar rotator whose rotation center axis is parallel to the rotation center axis of the grinding part and has a predetermined width, or a plurality of support rotation bodies are arranged with a predetermined interval. 2. The coating film removing apparatus according to claim 1, wherein the coating film removing apparatus is constituted by a wheel-shaped rotating body. The grinding part is formed on the outer peripheral surface of a rotating body whose rotation center axis is parallel to the panel surface and intersects the apparatus operation direction, and the outer shape corresponds to the sectional shape of the panel joint groove. Comprising
The support rotating body has a rotation center axis parallel to the rotation center axis of the grinding part and is arranged on the same straight line as the grinding part, and a tip part thereof is fitted into a panel joint groove, and at least an outer periphery of the tip part 2. The coating film removing apparatus according to claim 1, wherein a part of the surface has a width capable of coming into contact with a side surface of the panel joint groove. The coating film removing apparatus according to any one of claims 1 to 3, wherein a plurality of the support rotating bodies are arranged in series before and after the operation direction of the grinding unit.

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