New roof tile polishing device and new roof tile polishing method

Abstract

To provide a slate-based tile polishing device which can polish a slate-based tile more properly and yet inhibit scattering of powder dust occurring during polishing.SOLUTION: A polishing device includes: a rotary brush which polishes a surface layer of a slate-based tile; and a cover which is provided so as to enclose a periphery of the rotary brush. The rotary brush has: a shaft part 31; and a brush 32 which is attached so as to extend outward from an outer peripheral surface of the shaft part 31. The shaft part 31 has: a large diameter shaft part 310; and a small diameter shaft part 311 having an outer diameter smaller than that of the large diameter shaft part 310. The brush 32 has: a small brush 320 which is attached to an outer periphery of the large diameter shaft part 310; and a large brush 321 which is attached to an outer periphery of the small diameter shaft part 311 and has an entire length longer than that of the small brush 320.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to an apparatus for polishing newly formed roofing tiles and a method for polishing newly formed roofing tiles. [Background technology]

[0002] Conventionally, roofing materials containing asbestos include slate and new roofing tiles. Slate and new roofing tiles are very light and inexpensive compared to clay roofing tiles, and therefore are widely used as exterior and roofing materials. However, it has been pointed out that if a person stays for a long time in an environment where asbestos dust is generated and inhales a large amount of asbestos, the incidence of lung cancer may increase. For this reason, very strict regulations are imposed on demolition and renovation work of buildings that use roofing materials containing asbestos. An example of a device capable of removing such roofing materials containing asbestos is the removal device described in the following Patent Document 1.

[0003] The removal device described in Patent Document 1 includes a dust suction machine and a hood. The dust suction machine sucks up dust generated when removing the roofing material through a filter. The hood is attached to the tip of a suction hose that extends from the dust suction machine and is in contact with the surface of the roofing material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-205110 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when a building using roofing materials containing asbestos becomes deteriorated, it is desirable to replace the roofing materials, but when the building is, for example, a factory building, it may be difficult to replace the roofing materials. Specifically, if the roofing materials of a factory building are replaced, there is a risk that the building will not be able to manufacture products for a long period of time while the roofing materials are being replaced. In addition, replacing roofing materials requires a large amount of money. For these reasons, there are many businesses that are unable to take the plunge and replace their deteriorated roofing materials.

[0006] Therefore, the inventor is considering a method of reinforcing the roofing material by applying a predetermined reinforcing agent to the surface of the roofing material to extend the life of the roofing material. When reinforcing the roofing material in this way, in order to properly apply the reinforcing agent to the surface of the roofing material, it is necessary to remove foreign matter and the like accumulated on the surface of the roofing material by grinding the surface layer of the roofing material. For example, when new tiles are used as the roofing material, two new tiles are arranged so as to overlap in the vertical direction, so that foreign matter is likely to accumulate in the step formed between the new tiles, that is, the so-called inside corner. In this regard, although the slate removal device described in Patent Document 1 can suck up the dust generated when removing the roofing material, it is difficult to remove the foreign matter accumulated in the inside corner of the new tiles. Therefore, a new device capable of more accurately grinding the roofing material using new tiles is desired. In addition, when actually grinding the surface layer of the new tiles, there is a possibility that the dust of the new tiles generated during grinding will scatter around, so measures to suppress this are necessary.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide an apparatus and method for polishing newly formed tiles that can polish newly formed tiles more accurately while suppressing the scattering of dust generated during polishing. [Means for solving the problem]

[0008] The polishing device that solves the above problem is a polishing device for polishing newly grown tiles, and includes a rotating brush that polishes the surface layer of the newly grown tiles by rotating vertically about a predetermined central axis relative to the surface layer of the newly grown tiles, and a cover provided to surround the periphery of the rotating brush. The rotating brush has a shaft portion that rotates about the central axis, and a brush attached to extend outward from the outer circumferential surface of the shaft portion. The shaft portion has a large diameter shaft portion having a predetermined outer diameter, and a small diameter shaft portion having an outer diameter smaller than that of the large diameter shaft portion. The brush has a small brush attached to the outer periphery of the large diameter shaft portion, and a large brush attached to the outer periphery of the small diameter shaft portion and having a longer overall length than the small brush.

[0009] Generally, the longer the overall length of a brush, the lower its rigidity. Therefore, according to the above configuration, brushes with different rigidity are attached to the shaft. Also, by attaching a small brush with a short overall length to a large diameter shaft and a large brush with a long overall length to a small diameter shaft, as in the above configuration, it is possible to make the outer diameter of the entire rotating brush uniform. Thus, according to the above configuration, since the overall outer diameter of the rotating brush can be made uniform while making the partial rigidity of the brush different, the brush can be more reliably brought into contact with the corners of the new tiles. As a result, it is possible to polish the new tiles more accurately. Moreover, the cover provided to surround the periphery of the brush can also suppress the scattering of dust generated by the brush polishing the surface layer of the new tiles.

[0010] In the above-mentioned newly-grown roofing tile polishing device, when a direction parallel to the central axis is taken as an axial direction, it is preferable that the device further comprises auxiliary wheels that are arranged offset in the axial direction from the rotating brush. According to this configuration, by bringing the training wheels into contact with the newly grown roof tile, it becomes easier to stabilize the posture of the grinding device.

[0011] In the newly-made roof tile polishing device, it is preferable that the auxiliary wheels are capable of changing their positions relative to the rotating brush. For example, when an axis perpendicular to the central axis is defined as a predetermined axis and a direction parallel to the predetermined axis is defined as a height direction, it is preferable that the auxiliary wheels are capable of changing their positions relative to the rotating brush in the height direction.

[0012] According to this configuration, by displacing the auxiliary wheels relative to the rotating brush, it is possible to arbitrarily change the attitude of the grinding device with respect to the newly grown roof tile. It is preferable that the newly-grown roof tile polishing device further comprises a handle that can be held by a user.

[0013] This configuration allows a user to easily operate the grinding device by gripping the handle. In the newly-formed roofing tile polishing device, it is preferable that the position of the handle is changeable relative to the rotating brush. For example, when an axis perpendicular to the central axis is defined as a predetermined axis, it is preferable that the position of the handle is changeable relative to the rotating brush in a rotation direction centered on the predetermined axis. Also, when a direction parallel to the predetermined axis is defined as a height direction, it is preferable that the position of the handle is changeable relative to the rotating brush in the height direction.

[0014] According to this configuration, the handle can be displaced relative to the rotating brush, making it easier for the user to achieve a handle position that suits their preference. In the above-mentioned newly formed tile polishing device, when the direction in which the polishing device advances due to the rotation of the rotating brush is defined as the forward direction and the opposite direction as the rearward direction, it is preferable that the device further comprises a suction section which sucks in at least one of a front region located forward of the portion of the newly formed tile that is covered by the cover, and a rear region located rearward of the portion of the newly formed tile that is covered by the cover.

[0015] According to this configuration, even if dust from newly formed tiles leaks from the cover, the leaked dust can be sucked up by the suction section, so that scattering of dust can be more effectively prevented. In a method for polishing newly formed tiles using the above-mentioned polishing device, the direction in which the polishing device moves due to the rotation of the rotating brush is defined as the forward direction, the opposite direction as the backward direction, and the direction perpendicular to the front-to-back direction as the left-to-right direction, the user is positioned in either the left or right direction relative to the polishing device and slides the polishing device in the front-to-back direction to polish the newly formed tiles.

[0016] This method makes it easier to polish new roof tiles. Effect of the Invention

[0017] According to the newly formed roof tile polishing device and method of the present invention, it is possible to polish newly formed roof tile more accurately while suppressing scattering of dust generated during polishing. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a polishing device for newly-made roofing tiles according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view showing a perspective structure of a newly-formed roofing tile according to the first embodiment. [Diagram 3] FIG. 2 is a cross-sectional view showing the cross-sectional structure of a newly-regenerated roofing tile according to the first embodiment. [Figure 4] FIG. 2 is a cross-sectional view showing a partial cross-sectional structure of the grinding machine body of the first embodiment. [Diagram 5] FIG. 2 is a side view showing a side structure of the grinding machine body of the first embodiment. [Figure 6] FIG. 2 is a front view showing the front structure of the training wheel according to the first embodiment. [Figure 7] FIG. 3 is a cross-sectional view showing the cross-sectional structure of a tip portion of a shaft portion of the handle of the first embodiment. [Figure 8] 4A to 4C are cross-sectional views showing an example of operation of the grinding machine body according to the first embodiment. [Figure 9] FIG. 2 is a cross-sectional view showing a cross-sectional structure of the rotating brush according to the first embodiment. [Figure 10] FIG. 2 is a perspective view showing a perspective structure of a cover according to the first embodiment. [Figure 11] 4A to 4C are cross-sectional views showing an example of operation of the grinding machine body according to the first embodiment. [Figure 12] FIG. 11 is a plan view showing the planar structure of a dust suction port in a cover of a modified example of the first embodiment. [Figure 13] FIG. 6 is a cross-sectional view showing a partial cross-sectional structure of a grinding machine body according to a second embodiment. [Figure 14] FIG. 13 is an enlarged view showing the structure of a movable part of a grinding machine body according to a second embodiment. [Figure 15] FIG. 11 is a side view showing a side structure of a grinding machine body according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of a polishing device for new roofing tiles will be described with reference to the drawings. In order to facilitate understanding of the description, the same components in each drawing are denoted by the same reference numerals as much as possible, and duplicated descriptions will be omitted. First Embodiment As shown in FIG. 1, the polishing device 10 of this embodiment is a device for polishing the surface layer of a new roof tile 3 used as a roofing material for a building 2. The new roof tile 3 is made mainly of cement and asbestos, and is formed into a plate shape as shown in FIG. 2. As shown in FIG. 3, the roofing material for the building 2 is formed by stacking a plurality of new roof tiles 3 alternately. A step 3a is formed between the stacked new roof tiles 3. Hereinafter, this step 3a is referred to as an "inner corner 3a." In roofing materials using such new roof tiles 3, foreign matter accumulates on the surface of the new roof tiles 3 over time. In particular, foreign matter is likely to accumulate in the inner corner 3a.

[0020] 1, a grinding device 10 includes a grinding machine body 11, a dust collection can 12, and a dust suction machine 13. The grinding machine body 11 and the dust collection can 12 are connected to each other via a first hose 14. The dust collection can 12 and the dust suction machine 13 are connected to each other via a second hose 15.

[0021] The grinding machine body 11 is the part that actually grinds the surface layer of the newly-grown roof tile 3. The grinding machine body 11 is operated by an operator after being placed on the top surface of the newly-grown roof tile 3. When the operator slides the grinding machine body 11 in the directions indicated by the arrows S1 and S2 in Fig. 2 relative to the top surface of the newly-grown roof tile 3, the surface layer of the newly-grown roof tile 3 is ground by the grinding machine body 11. Hereinafter, the directions indicated by the arrows S1 and S2 are referred to as "slide directions S1 and S2."

[0022] In addition, although FIG. 1 illustrates a situation in which the user is positioned below the grinder body 11 as an example, the user may be positioned above the grinder body 11. Dust generated by grinding the surface layer of the new roof tile 3 with the grinding machine body 11 is sucked into the dust collection can 12 through the first hose 14 by the suction force of the dust suction machine 13.

[0023] The dust collection can 12 is a part for collecting relatively large asbestos-containing dust such as dust residue generated by the grinding machine main body 11 grinding the surface layer of the new roofing tile 3. The relatively small asbestos-containing dust that cannot be collected by the dust collection can 12 is further sucked into the dust suction machine 13 through the second hose 15 based on the suction force of the dust suction machine 13.

[0024] The dust suction machine 13 is a device that is driven based on the supply of power to suck up dust generated by the grinding machine body 11 grinding the surface layer of the new roof tile 3. The dust suction machine 13 has inside thereof a dust pack 130 that collects small asbestos-containing dust contained in the air sucked from the dust collection can 12 through the second hose 15, and a multi-layer filter structure 131 that collects even finer asbestos-containing dust that cannot be collected by the dust pack 130. The multi-layer filter structure 131 is formed by combining a plurality of filters, such as a main filter, a micro filter, and a HEPA (High Efficiency Particulate Air) filter. The main filter is a filter that can collect asbestos-containing dust that cannot be collected by the dust pack. The micro filter is a filter that can collect micron-sized dust that cannot be collected by the main filter. The HEPA filter is a filter that can collect nano-sized dust that cannot be collected by the micro filter.

[0025] Next, a specific structure of the grinding machine body 11 of this embodiment will be described. As shown in FIG. 4, the grinder body 11 includes a main body 20, a rotating brush 30, a cover 40, training wheels 50, and a handle 60.

[0026] The main body 20 has a frame 21, a reduction gear 22, and a belt 23. The frame 21 is formed of a metal material such as aluminum. The frame 21 has a vertical frame 210 and a horizontal frame 211. The vertical frame 210 is formed so as to extend in the directions indicated by the arrows Z1 and Z2. The horizontal frame 211 is connected to an approximate center portion of the vertical frame 210. The horizontal frame 211 is formed so as to extend from an approximate center portion of the vertical frame 210 in the direction indicated by the arrow X1.

[0027] Hereinafter, the direction indicated by the arrow Z1 will be referred to as "upward Z1", and the direction indicated by the arrow Z2 will be referred to as "downward Z2". The direction indicated by the arrow X1 will be referred to as "rightward X1", and the opposite direction will be referred to as "leftward X2". The up-down directions Z1, Z2 and the left-right directions X1, X2 are perpendicular to each other. In this embodiment, the up-down directions Z1, Z2 correspond to the height direction.

[0028] An insertion hole 210b is formed at the lower end of the vertical frame 210, penetrating in the thickness direction. A bearing 70 is provided in the insertion hole 210b. The bearing 70 rotatably supports the left end of the rotating shaft 80. In FIG. 4, the central axis of the rotating shaft 80 is indicated by "m10". A left shaft portion 81 is provided on the left end surface of the rotating shaft 80. The left shaft portion 81 of the rotating shaft 80 protrudes from the left side surface of the vertical frame 210.

[0029] The rotating shaft 80 is formed to extend in the right direction X1 from the right side surface of the vertical frame 210. The rotating brush 30 is attached to the right end of the rotating shaft 80. A threaded portion 82 is formed on the right end surface of the rotating shaft 80. A nut 83 is screwed into this threaded portion 82, whereby the rotating brush 30 is integrally assembled to the rotating shaft 80. Therefore, the rotating brush 30 can rotate integrally with the rotating shaft 80 about an axis m10.

[0030] An insertion hole 210a is formed at the upper end of the vertical frame 210, penetrating in the thickness direction. The reduction gear 22 is inserted and fixed in the insertion hole 210a. The output shaft 220 of the reduction gear 22 protrudes from the left side surface of the vertical frame 210. As shown in FIG. 5, the reduction gear 22 is connected to a motor 24. The motor 24 is connected to a power source (not shown) via a cord 240. The motor 24 is driven based on the electric power supplied from the power source via the cord 240. The reduction gear 22 reduces the output torque of the motor 24 via a plurality of gears and outputs it. Note that the horizontal frame 211 and the auxiliary wheels 50 are not shown in FIG. 5.

[0031] 4, the belt 23 connects the output shaft 220 of the reduction gear 22 and the left shaft portion 81 of the rotating shaft 80. Specifically, a pulley 230 is provided on the left shaft portion 81 of the rotating shaft 80. Similarly, a pulley 231 is also provided on the output shaft 220 of the reduction gear 22. The belt 23 is wound around each of the pulleys 230, 231, so that the output shaft 220 of the reduction gear 22 is connected to the left shaft portion 81 of the rotating shaft 80 via the belt 23.

[0032] The auxiliary wheel 50 is attached to the right end surface of the horizontal frame 211. The auxiliary wheel 50 has a leg 51 and a wheel 52. As shown in FIG. 6, the leg 51 is made of a rectangular member formed to extend in the up-down direction Z1, Z2. A long hole 510 is formed in the leg 51 so as to extend downward Z2 from its upper end. A wheel 52 is provided at the lower end of the leg 51. The wheel 52 rotates around an axis m20. As shown in FIG. 4, the central axis m20 of the wheel 52 is parallel to the central axis m10 of the rotating brush 30. When the direction parallel to the central axis m10 of the rotating brush 30 is defined as the axial direction Da, the auxiliary wheel 50 is attached to the main body 20 so as to be shifted from the rotating brush 30 in the axial direction Da.

[0033] The leg 51 of the training wheel 50 is fastened and fixed to the right end surface of the horizontal frame 211 by a bolt 53 inserted into a long hole 510. By loosening the bolt 53, the user can displace the training wheel 50 relatively to the horizontal frame 211, for example, upward Z1. After displacing the training wheel 50 relatively to the horizontal frame 211, the user tightens the bolt 53 again, thereby fixing the training wheel 50 to the main body 20.

[0034] The handle 60 is attached to the approximate center of the horizontal frame 211. The handle 60 is formed in an approximate T-shape, and has a cylindrical shaft portion 61 formed to extend in the up-down direction Z1, Z2, and a grip portion 62 formed to extend in the left-right direction X1, X2. The grip portion 62 is a portion that a user grasps with both hands. As shown in FIG. 7, a first through hole 611 and a second through hole 612 are formed at the tip of the shaft portion 61. When the central axis of the shaft portion 61 is "m30", each of the through holes 611, 612 is formed to penetrate the shaft portion 61 in a direction perpendicular to the central axis m30. The first through hole 611 and the second through hole 612 are formed to be shifted by 90 degrees in the rotation direction Dc around the central axis m30 of the shaft portion 61.

[0035] As shown by the two-dot chain line in FIG. 7, a protrusion 211a is formed on the upper surface of the horizontal frame 211. The protrusion 211a is formed in a cylindrical shape centered on the axis m30. The tip of the shaft 61 of the handle 60 is inserted into the protrusion 211a. A through hole 211b is formed in the protrusion 211a, penetrating in a direction perpendicular to the central axis m30. FIG. 7 illustrates a case in which the position of the through hole 211b of the protrusion 211a coincides with the position of the first through hole 611 of the handle 60. A pin 63 is inserted into the through hole 211b of the protrusion 211a and the first through hole 611 of the handle 60. The handle 60 and the horizontal frame 211 are integrally connected via the pin 63.

[0036] When the pin 63 is inserted into the through hole 211b of the protrusion 211a and the first through hole 611 of the handle 60 as shown in Fig. 7, the grip portion 62 of the handle 60 is in the state shown in Fig. 4. That is, the grip portion 62 is disposed so as to extend in the left-right directions X1 and X2 when the grinder body 11 is viewed from the front.

[0037] On the other hand, the user can displace the handle 60 in the rotation direction Dc relative to the horizontal frame 211 by removing the pin 63 from the through hole 211b of the protrusion 211a and the first through hole 611 of the handle 60. At this time, when the user moves the position of the second through hole 612 of the handle 60 to the position of the through hole 211b of the protrusion 211a and then inserts the pin 63 into them, the handle 60 can be connected to the horizontal frame 211 in the state shown in FIG. 8. In this state, when the grinding machine body 11 is viewed from the front, the grip part 62 of the handle 60 is arranged to extend in a direction perpendicular to the left-right directions X1 and X2. That is, the handle 60 is fixed to the main body 20 in a position rotated by 90 degrees from the position shown in FIG. 4. In this way, the handle 60 is attached to the main body 20 so as to be displaceable in the handle rotation direction Dc relative to the main body 20.

[0038] As shown in FIG. 9, the rotating brush 30 has a shaft portion 31 and a brush 32. The shaft portion 31 is formed in a cylindrical shape centered on the axis m10. The shaft portion 31 includes a large diameter shaft portion 310 having a predetermined outer diameter, and a small diameter shaft portion 311 having an outer diameter smaller than that of the large diameter shaft portion 310. The small diameter shaft portion 311 is provided on each of both side surfaces of the large diameter shaft portion 310 in the axial direction Da.

[0039] The brush 32 has a small brush 320 attached to the outer periphery of the large diameter shaft portion 310 of the shaft portion 31, and a large brush 321 attached to the outer periphery of the small diameter shaft portion 311. In this way, the small brush 320, which has a short overall length, is attached to the large diameter shaft portion 310, and the large brush 321, which has a long overall length, is attached to the small diameter shaft portion 311, so that the overall outer diameter of the rotating brush 30 can be made uniform.

[0040] As shown in Fig. 4, the rotating brush 30 rotates integrally with the rotating shaft 80 around the axis m10. This causes the grinding machine body 11 to move in the direction indicated by the arrow Y1 shown in Fig. 5. The direction indicated by the arrow Y1 is perpendicular to both the up-down directions Z1, Z2 and the left-right directions X1, X2. Hereinafter, the direction indicated by the arrow Y1 will be referred to as the "forward Y1" and the opposite direction will be referred to as the "rearward Y2."

[0041] As shown in Fig. 4, the cover 40 is attached to the frame 21 so as to cover the outer periphery of the rotating brush 30. In Fig. 4, only the outline of the cover 40 is shown by a two-dot chain line. As shown in Fig. 5, the cover 40 has an upper cover 41 and a lower cover 42.

[0042] The upper cover 41 is formed in a substantially semi-cylindrical shape centered on the axis m10. The upper cover 41 is formed of a metal material, for example, a steel material such as SPC material or aluminum. The upper cover 41 has an opening at its lower end. The lower cover 42 is formed in a substantially rectangular ring shape, and is joined by adhesive or the like over the entire periphery to the lower end of the upper cover 41. The lower cover 42 is made of an elastic material, for example, transparent rubber.

[0043] A cylindrical dust suction port 412 is provided on the back surface of the upper cover 41. The dust suction port 412 communicates with the internal space of the cover 40. The first hose 14 is connected to the dust suction port 412. As shown in Figures 5 and 10, a water pipe 90 is provided on the front surface of the upper cover 41, which is provided on the forward side Y1. The water pipe 90 is formed to extend in the left-right directions X1 and X2. A plurality of nozzles 91 are formed in the water pipe 90 at predetermined intervals in the left-right directions X1 and X2. Water is supplied to the water pipe 90 via a hose (not shown). A cock valve or the like is provided midway through the hose, allowing the user to manually start and stop the supply of water to the water pipe 90.

[0044] Next, an example of the operation of the polishing apparatus 10 of this embodiment will be described. When grinding the surface layer of the newly-grown tile 3, the grinding machine main body 11 is first placed on the top surface of the newly-grown tile 3, and then the position of the auxiliary wheels 50 relative to the main body 20 is adjusted. Specifically, the user loosens the bolts 53 of the auxiliary wheels 50 shown in FIG. 4, and then, for example, moves the auxiliary wheels 50 upward Z1 and tightens the bolts 53. As a result, the auxiliary wheels 50 are fixed in a state displaced upward Z1 relative to the main body 20. By adjusting the position of the auxiliary wheels 50 in this way, if the auxiliary wheels 50 are brought into contact with the top surface of the newly-grown tile 3 while the rotating brush 30 is brought into contact with the inside corner 3a of the newly-grown tile 3, the grinding machine main body 11 can take a tilted posture with respect to the newly-grown tile 3, as shown in FIG. 11. In addition, the user can arbitrarily adjust the position of the auxiliary wheels 50 relative to the main body 20 in the vertical directions Z1 and Z2 to arbitrarily adjust the position from the newly-grown tile 3 to the handle 60.

[0045] On the other hand, by fixing the position of the handle 60 in the position shown in Figure 11, i.e., by fixing the position of the handle 60 so that the gripping portion 62 extends in the front-to-rear direction, the user can easily move the grinding machine body 11 in the direction along the inside corner 3a of the newly formed tile 3. 11, after placing the grinding machine body 11 on the surface of the newly-grown tile 3, the user supplies water to the water pipe 90, which then sprays water onto a predetermined area of ​​the newly-grown tile 3 located in the front Y1 of the cover 40. This allows the surface layer of the newly-grown tile 3 to be saturated with water, thereby preventing dust generated when the surface layer of the newly-grown tile 3 is ground by the rotating brush 30 from scattering into the air.

[0046] When actually polishing the surface layer of the newly-grown roof tile 3, the user supplies power to the motor 24 by connecting the cord 240 shown in Fig. 5 to a power source. When the motor 24 starts to operate, the output torque of the motor 24 is transmitted to the rotating shaft 80 via the reducer 22 and the belt 23, and the rotating brush 30 rotates integrally with the rotating shaft 80 around the central axis m10. That is, the rotating brush 30 rotates vertically relative to the surface of the newly-grown roof tile 3. At this time, since the lower end of the rotating brush 30 is in contact with the surface of the newly-grown roof tile 3, the rotation of the rotating brush 30 scrapes off the surface layer present in the region from the surface of the newly-grown roof tile 3 to a predetermined depth.

[0047] Generally, the longer the overall length of a brush, the lower its rigidity becomes. In this regard, the shaft portion 31 of the rotating brush 30 of this embodiment has a small brush 320 in its center and a large brush 321 on both sides of the small brush 320, as shown in FIG. 9. That is, the rotating brush 30 has brushes with different rigidities. Also, if the small brush 320 with a short overall length is attached to the large diameter shaft portion 310 and the large brush 321 with a long overall length is attached to the small diameter shaft portion 311, it is possible to make the overall outer diameter of the rotating brush 30 uniform. In this way, in the rotating brush 30 of this embodiment, the outer diameter of the rotating brush 30 can be made uniform while making the partial rigidities of the brush 32 different. Therefore, when the rotating brush 30 is brought into contact with the inside corner 3a of the new roof tile 3 as shown in FIG. 11, the small brush 320 with high rigidity comes into contact with the corner 3b of the inside corner 3a. Therefore, it is possible to more reliably remove foreign matter accumulated at the corner 3b of the inside corner 3a. In addition, since the large brush 321 has low rigidity and is easily deformed, it is easy for it to come into close contact with the area around the corner 3b of the inside corner 3a. Therefore, foreign matter accumulated in the area around the corner 3b of the inside corner 3a can be more reliably removed.

[0048] The dust generated by scraping off the surface layer of the new roof tile 3 with the rotation of the rotating brush 30 contains not only foreign matter adhering to the surface layer of the new roof tile 3, but also a part of the surface layer of the new roof tile 3, i.e., asbestos. The asbestos-containing dust generated inside the cover 40 is sucked into the dust collection can 12 via the first hose 14 by the suction force of the dust suction machine 13 shown in FIG.

[0049] The dust collection can 12 collects relatively large asbestos-containing dust from among the dust sucked in through the first hose 14. The asbestos-containing dust that cannot be collected by the dust collection can 12 is further sucked into the dust suction machine 13 through the second hose 15 based on the suction force of the dust suction machine 13. The dust suction machine 13 collects minute asbestos-containing dust by the dust pack 130 and multi-layer filter structure 131 provided therein.

[0050] The user grips the handle 60 while positioned in the right direction X1 relative to the grinding machine body 11. In this state, if the user slides the grinding machine body 11 in the front-rear directions Y1 and Y2 relative to the newly grown roof tile 3, any region of the newly grown roof tile 3 can be ground. Depending on the situation, the user may be positioned in the left direction X2 relative to the grinding machine body 11.

[0051] According to the polishing apparatus 10 and polishing method of the present embodiment described above, the following actions and effects (1) to (6) can be obtained. (1) The rotating brush 30 has a shaft portion 31 and a brush 32. The shaft portion 31 has a large diameter shaft portion 310 and a small diameter shaft portion 311. The brush 32 has a small brush 320 and a large brush 321. The small brush 320 is attached to the outer periphery of the large diameter shaft portion 310. The large brush 321 is attached to the outer periphery of the small diameter shaft portion 311 and has a total length longer than that of the small brush 320. With this configuration, the entire outer diameter of the rotating brush 30 can be made uniform, so that the brush 32 can be more reliably brought into contact with the inside corner 3a of the newly-grown tile 3. As a result, the newly-grown tile 3 can be more accurately polished. Moreover, the cover 40 provided to surround the periphery of the brush 32 can also suppress the scattering of dust generated by the brush 32 polishing the surface layer of the newly-grown tile 3.

[0052] (2) The auxiliary wheels 50 are disposed offset in the axial direction Da from the rotating brush 30. According to this configuration, by bringing the auxiliary wheels 50 into contact with the newly grown roof tile 3, the posture of the grinding device 10 can be easily stabilized. (3) The position of the auxiliary wheels 50 can be changed relative to the rotating brush 30. Specifically, the position of the auxiliary wheels 50 can be changed relative to the rotating brush 30 in the up-down directions Z1 and Z2. According to this configuration, by displacing the auxiliary wheels 50 relative to the rotating brush 30, it is possible to arbitrarily change the attitude of the grinding device 10 with respect to the newly grown roof tile 3.

[0053] (4) The grinding apparatus 10 further includes a handle 60 that can be held by a user. With this configuration, the user can easily operate the grinding apparatus 10 by holding the handle 60. (5) The position of the handle 60 is changeable relative to the rotating brush 30. Specifically, the position of the handle 60 is changeable in the rotation direction Dc relative to the rotating brush 30. According to this configuration, by changing the position of the handle 60 relative to the rotating brush 30, it becomes easier to realize a position of the handle 60 that suits the user's preference.

[0054] (6) While the user is positioned in either the left-right direction X1 or X2 with respect to the grinding machine body 11, the user slides the grinding machine body 11 in the front-back direction Y1 or Y2 to grind the newly-grown roof tile 3. According to this grinding method, it is possible to grind the newly-grown roof tile more easily. (Modification) Next, a modification of the polishing apparatus 10 of the first embodiment will be described.

[0055] 12, in the sanding apparatus 10 of this modified example, the dust suction port 412 formed in the cover 40 is formed so as to become wider from the connection portion with the first hose 14 toward the cover 40. With this configuration, dust is less likely to become clogged in the dust suction port 412, making it possible to remove dust more accurately.

[0056] <Second embodiment> Next, a polishing apparatus 10 according to a second embodiment will be described, focusing on the differences from the polishing apparatus 10 according to the first embodiment. As shown in FIG. 13, in the grinding apparatus 10 of this embodiment, a movable part 100 is further provided in the middle of the shaft part 61 of the handle 60.

[0057] Specifically, the shaft portion 61 of the handle 60 has a rectangular cross section perpendicular to its central axis m30. The shaft portion 61 is divided into an upper shaft portion 64 connected to the grip portion 62, and a lower shaft portion 65 connected to the horizontal frame 211. As shown in Fig. 14, a recess 650 is formed in the upper end surface of the lower shaft portion 65. The lower end portion 640 of the upper shaft portion 64 is inserted into the recess 650 of the lower shaft portion 65.

[0058] A through hole 66 is formed through both side walls 651, 652 of the recess 650 of the lower shaft portion 65 and the lower end portion 640 of the upper shaft portion 64. In Fig. 14, the central axis of the through hole 66 is indicated by "m40". The upper shaft portion 64 and the lower shaft portion 65 are fastened and fixed to each other by a fastening structure of a bolt 67 and a nut 68 inserted into the through hole 66.

[0059] The inner surfaces 651a, 652a of the side walls 651, 652 of the lower shaft portion 65 are formed with an uneven structure having alternating concave and convex portions in the rotation direction Dd around the axis m40. Similar uneven structures are also formed on the right side surface 640a and the left side surface 640b of the lower end portion 640 of the upper shaft portion 64. The uneven structures formed on the side walls 651, 652 of the lower shaft portion 65 and the uneven structure formed on the lower end portion 640 of the upper shaft portion 64 are engaged with each other in the rotation direction Dd around the axis m40. This engagement structure makes it difficult for the upper shaft portion 64 to be displaced relative to the lower shaft portion 65 in the rotation direction Dd around the axis m40.

[0060] In the grinding apparatus 10 of this embodiment, by loosening the nut 68, it becomes possible to displace the upper shaft portion 64 in a rotational direction about the axis m40 relative to the lower shaft portion 65. This allows the handle 60 to be displaced relatively to the main body portion 20 in the up-down directions Z1 and Z2, as shown in Fig. 13. After displacing the handle 60 to a desired rotational position, the user can fix the position of the handle 60 relative to the main body portion 20 by tightening the nut 68 onto the bolt 67.

[0061] According to the polishing apparatus 10 of the present embodiment described above, the following action and effect described in (6) can be further obtained. (6) The position of the handle 60 is changeable in the handle rotation direction Dd relative to the rotating brush 30. This configuration makes it easy to position the handle 60 according to the user's preference.

[0062] <Third embodiment> Next, a polishing apparatus 10 according to a third embodiment will be described, focusing on the differences from the polishing apparatus 10 according to the first embodiment. 15, in the grinding apparatus 10 of this embodiment, a suction unit 110 is provided at the front Y1 of the cover 40. The lower end of the suction unit 110 is open. The upper end of the suction unit 110 is connected to the first hose 14 via a branch hose 111.

[0063] In the polishing device 10 of this embodiment, when the dust suction machine 13 shown in Fig. 1 is driven, a suction force is generated in the suction unit 110 via the first hose 14 and the branch hose 111. As a result, the suction unit 110 sucks a front area Y1 of the newly-grown roof tile 3 that is located forward of the portion covered by the cover 40.

[0064] According to the polishing apparatus 10 of the present embodiment described above, the following action and effect described in (7) can be further obtained. (7) Even if dust from the newly formed roof tile 3 leaks from the front side Y1 of the cover 40, the leaking dust can be sucked in by the suction section 110, so that scattering of dust can be more effectively prevented.

[0065] <Other embodiments> The above embodiment can also be implemented in the following manner. In the grinding device 10 of the third embodiment, the suction unit 110 may be provided at the rear Y2 of the cover 40. In this case, the suction unit 110 sucks a rear region of the newly grown roof tile 3 that is located at the rear Y2 of a portion covered by the cover 40. Alternatively, the suction units 110 may be provided at the front Y1 and rear Y2 of the cover 40. Furthermore, the suction unit 110 may be provided at least one of the right direction X1 and the left direction X2 of the cover 40.

[0066] The present disclosure is not limited to the above specific examples. Any design modifications made by a person skilled in the art to the above specific examples are also included within the scope of the present disclosure as long as they have the features of the present disclosure. The elements of each of the above specific examples, as well as their arrangements, conditions, shapes, etc., are not limited to those exemplified and can be modified as appropriate. The elements of each of the above specific examples can be combined in different ways as appropriate, as long as no technical contradictions arise. [Explanation of symbols]

[0067] 3...New tile, 10...Polishing device, 20...Main body, 30...Rotating brush, 31...Shaft, 32...Brush, 40...Cover, 50...Training wheels, 60...Handle, 110...Suction part, 310...Large diameter shaft, 311...Small diameter shaft, 320...Small brush, 321...Large brush.

Claims

1. A polishing device for polishing newly-formed roofing tiles, A rotating brush that polishes the surface layer of the newly-made tile by rotating vertically around a predetermined central axis with respect to the surface layer of the newly-made tile; A cover provided to surround the periphery of the rotating brush, The rotating brush is A shaft portion that rotates around the central axis; a brush attached so as to extend outward from an outer circumferential surface of the shaft portion, The shaft portion is A large diameter shaft portion having a predetermined outer diameter; a small diameter shaft portion having an outer diameter smaller than that of the large diameter shaft portion, The brush is A small brush attached to the outer periphery of the large diameter shaft portion; a large brush attached to the outer periphery of the small diameter shaft portion and having a total length longer than that of the small brush; Polishing equipment for new roofing tiles.

2. When a direction parallel to the central axis is defined as an axial direction, The rotary brush further includes an auxiliary wheel disposed offset in the axial direction from the rotary brush. The polishing device for new roofing tiles according to claim 1.

3. The position of the auxiliary wheel is changeable relative to the rotating brush. The polishing device for new roofing tiles according to claim 2.

4. When an axis perpendicular to the central axis is defined as a predetermined axis, and a direction parallel to the predetermined axis is defined as a height direction, The auxiliary wheels are capable of changing their positions relative to the rotating brush in the height direction. The polishing device for new roofing tiles according to claim 3.

5. Further comprising a handle that can be gripped by a user. The polishing device for new roofing tiles according to claim 1.

6. The handle is movable relative to the rotating brush. The polishing device for new roofing tiles according to claim 5.

7. When an axis perpendicular to the central axis is defined as a predetermined axis, The position of the handle is changeable relative to the rotating brush in a rotation direction about the predetermined axis. The polishing device for new roofing tiles according to claim 6.

8. When the direction parallel to the predetermined axis is defined as the height direction, The handle is capable of changing its position in the height direction relative to the rotating brush. The polishing device for new roofing tiles according to claim 7.

9. The direction in which the polishing device moves due to the rotation of the rotating brush is defined as the forward direction, and the opposite direction is defined as the backward direction. The cleaning device further includes a suction unit that sucks at least one of a front region located forward of a portion of the newly formed roof tile that is covered by the cover and a rear region located rearward of the portion of the newly formed roof tile that is covered by the cover. The polishing device for new roofing tiles according to any one of claims 1 to 8.

10. A method for polishing new roofing tiles using the polishing device according to any one of claims 1 to 9, The direction in which the polishing device advances due to the rotation of the rotary brush is defined as the forward direction, the opposite direction is defined as the rearward direction, and the direction perpendicular to the forward-rearward direction is defined as the left-right direction. The user is positioned to the left or right of the grinding device, and slides the grinding device forward and backward to grind the newly grown roof tile. How to polish new roofing tiles.

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