JP6504440B2 - How to use the replaceable blade for coating film peeling tool - Google Patents

Description

  The present invention is a motorized coating having a rotary drum for rough removing the old coating before final finishing in the work of peeling and repairing the old coating deposited on the surface of a building outer wall, a bridge, etc. More specifically, the present invention relates to a method of using a blade for a film peeling tool used for a film peeling tool, wherein the blade for a film peeling tool is mounted on a surface of a rotating drum rotating in a grinding direction at a predetermined separation angle. On how to use

When repainting a coating film deposited on the surface of a concrete wall or steel plate etc. such as a building or a bridge by repainting, if the old coating film remains, the adhesion of the coating film to the wall surface is weak, the old Even if repainting on the surface where the coating film remains, the coating film peels off in a short time. Therefore, it is necessary to completely remove the old paint film from the wall surface.
In the old film peeling operation, a manual operation by hand using a scraper or a keren bar is generally used. The following methods have been proposed because manual labor by outplacement is physically painful during construction work.
An endless belt is wound around a pulley provided at one end of the main rotating shaft and the motor shaft, and washers and a predetermined thickness are maintained along the axial direction at positions separated by approximately 180 degrees in the circumferential direction on the circumferential surface of the main rotating shaft. Provided is a pair of metal fitting placement parts, in which a pair of biting metal fittings are alternately provided, and the pair of metal fitting placement parts are provided such that the metal fittings and the washers face each other in the rotational direction of the main rotating shaft. It has been proposed that the old paint film be physically removed from the concrete surface by impact to the wall surface of the front end edge of the metal fitting by driving the motor (see, for example, Patent Document 1).
In the case of the outer wall paint remover disclosed in Patent Document 1, vibration or noise is severe because the wall is slammed from the diagonally above with respect to the wall surface, and the film is cracked by impact due to smashing of the shard. Since the old coating film is not cut, the probability of the old coating film peeling from the concrete surface is low, and there is a problem that the old coating film can not be completely removed.
It is also generally performed to peel off the old coating film while adjusting the angle of the wall surface to be applied using a disc grinder (see, for example, Patent Document 2).
In order to peel off the old paint film using a disc grinder, it takes a long time for the peeling work because the contact area with the old paint film is large, and it is necessary to adjust the fine angle etc. with respect to the wall of the disk. And there is a problem that it requires skilled skills.
Moreover, although the electrically-driven canna disclosed in Patent Document 3 or Patent Document 4 uses the abrasive-type canna blade disclosed in Non-Patent Document 1 or Non-patent Document 2, these are used for old paint film peeling work. In fact, since the blade edge is located on the same straight line in the blade width direction, the area where the rotational force of the rotating shaft acts is large, and the pressure on the blade edge is not strong enough to peel off the old paint film as a whole. May be lost. Also, even if a part of the old paint film can be peeled off, even if the housing has suction means, there is no way for escaped dust to escape, and the dust falls or scatters around, damaging the environment. There was a point.
A plurality of cutting edges and non-cutting edges are alternately formed in the extending direction of the cutting edge, and the cutting edge is a ridge formed in the rake face and extending in a direction orthogonal to the extending direction of the cutting edge and a flat relief surface The ridges are formed by the intersection of ridges, and the ridges have a mountain-shaped cross section viewed from the direction perpendicular to the extending direction of the cutting edge, and the vertex is proposed a canner blade for cutting wood hair extending in the direction orthogonal to the extending direction of the cutting edge (See, for example, Patent Document 5).
When the canna blade for wood cutting disclosed in Patent Document 5 is used for the old film peeling operation, it can not be applied because there is no escape place for dust of the peeled old film.

Prior patent documents

Patent document

Japanese Utility Model Application Publication No. 5-26500 JP, 2004-142398, A Unexamined-Japanese-Patent No. 2003-251604 Patent No. 3498131 Patent Publication JP, 2006-346969, A

Tools Juraku Internet homepage Website of Makita Inc. on the Internet

According to the present invention, a blade of an electric power tool incorporating a rotary drum provided with several blades spaced apart in the circumferential direction is provided with a blade portion and a non-blade portion alternately along the blade width direction. Accordingly, it is an object of the present invention to provide a method of using a replaceable blade for a coating film peeling tool capable of peeling an old coating film with a strong cutting force because a rotational acting force of a rotating drum acts on a blade portion.

In order to achieve the above object, according to the invention as claimed in claim 1 of the present invention, two replacement blades for a coating film peeling tool in which blades and non-blades are alternately provided in the blade width direction are rotating drums. The old coating film is attached by cutting action of the blade part of the replaceable blade for two coating film peeling tools that are separately attached to the circumferential surface with a predetermined distance in the circumferential direction and rotate in the same direction by the rotational movement of the rotating drum. The trajectories of the blade portion of the first blade for a film peeling tool formed by the rotational movement of the rotary drum and the trajectories of the non-blade portion of the other blade for a film peeling tool formed by the rotational movement of the rotary drum coincide with each other uniformly and roughly. And, the coating blade for a coating peeling tool is a housing so that the trajectory of the non-edge portion of the coating blade for a coating peeling tool and the trajectory of the blade portion of the other coating peeling tool for a coating peeling blade coincide with each other. The circumferential surface of the rotary drum provided in the inside is separated in parallel with a predetermined distance in the circumferential direction of the rotary drum, and Note that the blade width direction is aligned with the axial direction of the rotating drum so that the line connecting the shaft center of the rotating drum and the tip edge of the blade has a parallel positional relationship, the cutting edge is directed outward, and two coated film peeling tools The replacement blade is characterized in that the front surface side of one coating film stripping tool replacement blade and the back surface side of the other coating film stripping tool replacement blade face the same circumferential direction and are attached.

In the present invention, since the blade portion and the non-blade portion are alternately provided along the blade width direction of the blade tip, the rotational force acts only on the blade portion as a cutting force, and there is an effect that the cutting force is large.
By attaching the replacement blade to the circumferential surface of the rotating drum so that the trajectories of the blade part of one replacement blade and the non-blade part of the other replacement blade coincide with each other, the rotational force is equal to that of the two replacement blades. There is an effect that the old paint film can be roughly removed efficiently.

It is a front view of the replaceable blade for a coating film peeling tool. Example 1 It is the sectional view on the AA line of FIG. Example 1 It is cross-sectional explanatory drawing which shows the state which attached the 2nd blade for coating film peeling tools to the drum of an electric film coating peeling tool. Example 1 It is side explanatory drawing which shows the use condition which attached the coating-film peeling tool spare blade to the drum of an electric film coating-peeling tool. Example 1 It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 2) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 3) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 4) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 5) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 6) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 7) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 8) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 9) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 10) It is a front view which shows only the blade part of the replaceable blade for a coating film peeling tool. (Example 11)

  According to the present invention, the rotational force of the rotating drum acts only on the blade portion by alternately providing the blade portion and the non-blade portion in the blade width direction to increase the cutting force, and the adjacent blade portions are recessed to cause non-cutting. By making it a blade part, scattering of the old coating scrap that has been peeled off and scraped off by the cutting force of the cutting section from the non-blade section is prevented by letting it escape from the non-cutting section, 2 By arranging the replacement blades on the rotary drum so that the trajectories of the blade portion and the non-blade portion coincide with each other, it is possible to uniformly and roughly remove the old coating film by the limited rotational force of the rotary drum.

  Example 1 will be described based on FIGS. 1 and 2. The coating film peeling tool replacement blade 1 comprises a coating film peeling tool replacement blade main body 2 and a grinding tip 3. The coating film peeling tool replacement blade main body 2 is made of metal having a low thermal expansion coefficient, and has a predetermined thickness and is formed in a substantially plate shape long in the width direction. As specific examples, it is preferable to use iron, stainless steel (SUS), high speed steel tool steel (SKH), an alloy of iron and aluminum, an alloy of iron, aluminum and cobalt, cast iron, carbon steel, etc. is there. The blade edge side of the coating film peeling tool replacement blade main body 2 has a constant interval along the blade width direction, and concave portions and convex portions are alternately formed regularly.

  The convex portion on the blade edge side is formed on the base portion 4 for embedding the grinding tip 3 in which the fitting / fixing embedded groove (not shown) is recessed on the tip end surface. The lower embedded portion of the grinding tip 3 having high hardness, which contains cemented carbide particles in the base material, is embedded in the fitting fixation embedded groove (not shown), and the grinding tip 3 is placed on the tip of the base portion 4 The fitting is fixed. The grinding tip 3 is considered to appropriately use either a polycrystalline diamond sintered body, a polycrystalline cubic boron nitride sintered body, or a mixture of diamond particles and hard participation particles. The tip surface of the grinding tip 3 is formed to be flat. A line connecting the tip surfaces of the grinding tips 3 fixed to the respective base portions 4 formed on the cutting edge side of the paint stripping tool replacement blade main body 2 is formed so as to be on a straight line when viewed from the front and back It is done. The grinding tip 3 serves as a blade for peeling off the old coating.

  A non-blade portion 5 is recessed between adjacent base portions 4 provided in the blade width direction on the blade edge side of the coating film peeling tool replacement blade main body 2. The non-blade portion 5 provided between the base portions 4 and 4 is recessed in a U-shaped groove in a regular back view. That is, the left and right sides of the deepest portion of the groove bottom are formed in an arc shape to act as a reinforcing rib for enhancing the strength of the convex portion against physical impact. The coating film peeling tool replaceable blade main body 2 is formed on a convex base portion 4 extending in a straight line with the side edge on the back side at one end side in the blade width direction, and the grinding tip 3 is provided at the tip ing. The other end side in the blade width direction is formed in the non-blade portion 6 and is continuous with the back side edge.

  On the back side of the coating film peeling tool replacement blade main body 2, there are provided hook-like fixing bolt mounting grooves 7 and 8 which are open on the back side and are recessed on the blade side.

  The method of use will be described based on FIGS. 3 and 4. The front blade plate 10 and the rear bottom plate 11 are mounted on the lower surface of the housing 9 with the lower surface opened, with the front bottom plate 10 and the rear bottom plate 11 separated by a predetermined distance in the front-rear direction. It is used for the coating film peeling tool 13 of a formula. In Example 1, a blade width of 82 mm, an electric canna model 1900 B (trade name of Makita Co., Ltd.) is used as the electric film peeling tool 13. That is, the blade width 82 mm electric canna model 1900 B (trade name of Makita Co., Ltd.) is used by removing the canna blade of the motorized canna and replacing the replaceable blade 1 for a coating film peeling tool of the present invention. In a state where the cutting edge of the coating film peeling tool replacement blade 1 protrudes outward from the rotary drum 12 to the blade mounting portion of the rotary drum 12, the coating film peeling tool is replaced by the pressing plate 14 and the blade mounting portion of the rotary drum 12. The blade 1 is sandwiched, and the coating film peeling tool replacement blade 1 is fastened and fixed by the fixing bolts 15 and 16. Specifically, as shown in FIG. 3, the coating film peeling tool replacement blade 1 is fixed to the rotating drum 12 by the pressing plate 14 and the fixing bolts 15 and 16 so that the grinding tip 3 protrudes from the peripheral surface of the rotating drum 12. Attached to The axial center of the rotary drum 12 and the tip of the grinding tip 3 are mounted on the rotary drum 12 so that the axial center of the rotary drum 12 and the tip of the grinding tip 3 are parallel to each other. There is. Of the two coating film peeling tool replacement blades 1 and 1 attached to the same rotating drum 12, the front surface side of the coating film peeling tool replacing blade 1 faces the inner side of the rotating drum 12, and the other coating The membrane peeling tool replacement blade 1 is fixed to the rotating drum 12 so that the back side faces the inside of the rotating drum 12. As described above, by setting the attachment directions of the two coating film peeling tool replacement blades 1, 1 to the rotating drum 12 in opposite directions, the two sheets attached to the rotating drum 12 by the circumferential rotation of the rotating drum 12 The trajectory of the blade portion and the blade portion having the respective grinding tips 3 of the replaceable blades 1, 1 for the coating film peeling tool at the tip is prevented from overlapping. Further, the orbits of the non-blade portions 5 and 6 and the non-blade portions 5 and 6 were also prevented from overlapping. In other words, the trajectory of the grinding tip 3 of one of the coating film peeling tool replacement blades 1 attached to the same rotary drum 12 overlaps with the trajectory of the non-blade portions 5 and 6 of the other coating film peeling tool replacement blade 1; The old coating film is roughly roughly uniformly removed by the grinding tips 3 of the coating film peeling tool replacement blades 1 and 1 in a rotating state exposed from the opening formed between the front bottom plate 10 and the rear bottom plate 11.

  A second embodiment shown in FIG. 5 will be described. In the second embodiment, the grinding tip 17 is not a rectangular solid, and the tip side edge is formed in an inclined surface.

  A third embodiment shown in FIG. 6 will be described. In the third embodiment, the width is gradually narrowed from the base portion 4 to the grinding tip 18.

  A fourth embodiment shown in FIG. 7 will be described. The tip of the grinding tip 19 is formed in the shape of a regular arc.

  A fifth embodiment shown in FIG. 8 will be described. The grinding tip 20 is formed in the shape of an equilateral triangle with a regular vision.

  A sixth embodiment shown in FIG. 9 will be described. The grinding tip 21 is formed in the shape of a straight eye as a cone.

  A seventh embodiment shown in FIG. 10 will be described. The upper portion of the base portion 4 extends in the width direction, and a rectangular grinding tip 22 is embedded and fixed to the tip of the base portion 4.

  An eighth embodiment shown in FIG. 11 will be described. The base portion 4 is formed wider as it goes upward, and fixes a grinding tip 20 having an isosceles triangle shape in ortho view.

  A ninth embodiment shown in FIG. 12 will be described. A middle portion in the height direction of the base portion 4 is formed in a wide shape in a bowl shape, and a grinding tip 23 is fixed to the tip of the base portion 4.

  A tenth embodiment shown in FIG. 13 will be described. A grinding tip 24 whose one side is an inclined surface is fixed to the tip end surface of the base portion 4.

  An eleventh embodiment shown in FIG. 14 will be described. The base 4 is slightly inclined in one direction, and a parallelogram-shaped grinding tip 25 is fixed to the tip so that a line connecting the tip faces is straight.

DESCRIPTION OF REFERENCE NUMERALS 1 replaceable blade 2 for a film removing tool 2 replaceable blade body for a film removing tool 3, 17, 18, 19, 20, 21, 22, 23, 24, 25 grinding tip 4 base 5, 6 non blade 9 housing 12 housing 12 Rotating drum 13 Coating film peeling tool

Claims (1)

Two separate blades for a coating film peeling tool, in which blades and non-blades are alternately provided in the blade width direction, are separately attached to the circumferential surface of the rotating drum with a predetermined distance in the circumferential direction. The old coating film can be roughly removed uniformly by the cutting action of the cutting edge of the replacement blade of the two coating film peeling tools that circulate in the same direction by the rotational movement of
The trajectory of the blade portion of the first blade for a coating film peeling tool formed by the rotational movement of the rotary drum coincides with the trajectory of the non-edge portion of the other blade for a coating film peeling tool, and one coating film The coating film peeling tool replacement blade is a rotary drum provided in the housing so that the trajectory of the non-blade portion of the peeling tool replacement blade and the trajectory of the blade portion of the other coating film peeling tool replacement blade coincide with each other. The axis of the rotary drum is spaced apart in parallel with a predetermined distance in the circumferential direction of the rotary drum on the circumferential surface of the rotary drum, and a line connecting the axial center of the rotary drum and the tip edge of the blade is parallel. Align the blade width direction in the direction, with the cutting edge facing outwards,
The two coating film stripping tool replacement blades are characterized in that the front side of one coating film stripping tool replacement blade and the back side of the other coating film stripping tool replacement blade face the same circumferential direction and are attached. How to use the replaceable blade for coating film peeling tool.

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