Brush and power tool

Abstract

To provide a brush capable of preventing a flange member from coming into contact with a surface to be worked and reducing the spread and deviation of brush pieces.SOLUTION: In the plurality of brush members 3 and 3, a buffer member 4 is arranged between the adjacent brush members 3 and 3 so that one side surface of the adjacent brush members 3 and 3 abuts on both side surfaces of the buffer member 4. The two flange members 5 and 5 are disposed so as to abut against the side surfaces of the brush members 3 and 3 located at both end portions, and the shaft member 6 is inserted into the hole portions 5a, 2a, and 4a of the plurality of brush members 3 and 3, the buffer member 4, and the two flange members 5 and 5, and is fixed to the two flange members 5 and 5 by expanding both end portions in the longitudinal direction to the outer peripheral side. The outer diameter of the buffer member 4 is larger than the outer diameter of the flange member 5, and the outer diameter of the brush member 3 is equal to or larger than the outer diameter of the buffer member 4.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a brush that can perform various types of processing on a surface to be processed, and to a power tool equipped with this brush. [Background technology]

[0002] Conventionally, brushes for various processes have been formed by a core material and brush pieces, and the brush pieces are known to be formed only from twisted wire or twisted wire and solid wire (Patent Document 1).

[0003] The wheel brush described in Patent Document 1 is formed from at least a core material and brush pieces, and the core material has a flange B with a hole A into which multiple brush pieces are sandwiched and a hole B formed in the center, a flange C with a hole C formed, and a flange A with a cylindrical end formed at a position corresponding to hole C in flange C, and the brush pieces are formed from twisted wire only or twisted wire and solid wire, and the approximate centers of the multiple brush pieces are sandwiched in hole A in flange B, the end of flange A is inserted into hole B in flange B, and hole C in flange C is passed through and fixed to the end of flange A. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4848063 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the wheel brush described in Patent Document 1 had to prevent the flange from coming into contact with the work surface due to wear of the brush pieces with use. Also, there was a problem that the brush tends to spread out with use, and adjacent brush pieces in the thickness direction tend to become misaligned.

[0006] The present invention solves the above-mentioned conventional problems, and aims to provide a brush and a power tool that can prevent the flange member from contacting the work surface and reduce the spreading and misalignment of the brush pieces. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems of the related art, the invention of claim 1 provides a brush having a plurality of brush bundles and a base that is generally ring-shaped in side view and has a hole in the center, and the approximate center of the brush bundle is press-fitted and fixed to a holder provided on the outer periphery of the base, and the brush has a plurality of brush members from which both end portions of the plurality of brush bundles extend radially, a buffer member made of a nonwoven fabric material or a rubber material that is formed in a generally disk shape in side view and has a hole in the center, two flange members that are also formed in a generally disk shape in side view and have a hole in the center, and a generally cylindrical shaft member, and the plurality of brush members have at least one gap between adjacent brush members. The buffer member is arranged so that one side of the adjacent brush member abuts against both side surfaces of the buffer member, the two flange members are arranged so that they abut against the side surfaces of the brush members or buffer members located at both ends, the shaft member is inserted into the holes of the multiple brush members, the buffer member, and the two flange members, and is fixed to the two flange members by expanding both longitudinal ends outward, the outer diameter of the buffer member is larger than the outer diameter of the flange members, and the outer diameter of the brush members is equal to or larger than the outer diameter of the buffer member.

[0008] In the brush invention of claim 1, the buffer member is arranged so that one side of the adjacent brush member abuts against both sides of the buffer member, which prevents the brush pieces from spreading out with use and prevents adjacent brush pieces from shifting in the thickness direction. Also, the outer diameter of the buffer member is larger than that of the flange member, and the outer diameter of the brush member is equal to or greater than that of the buffer member, which prevents the flange member from contacting the work surface due to wear of the brush pieces with use.

[0009] The invention of claim 2 is a brush having a plurality of brush bundles and a base that is generally ring-shaped in plan view and has a hole in the center, and the approximate centers of the brush bundles are press-fitted to a holder provided on the outer periphery of the base, and both end portions of the plurality of brush bundles extend in a direction perpendicular to the planar direction of the base, a buffer member made of a nonwoven fabric material or rubber material that is generally cup-shaped in cross section and has a hole in the center, two flange members that are generally cup-shaped in cross section and have a hole in the center, and a generally cylindrical shaft member, and the plurality of brush members are arranged between at least one adjacent brush member, and the buffer member is arranged between both side surfaces of the buffer member and one side surface of the adjacent brush member. the two flange members are arranged so as to abut against the respective side surfaces of the brush members or buffer members located at both ends, the shaft member is inserted into the holes of the plurality of brush members, the buffer member, and the two flange members, and fixed to the two flange members by spreading both longitudinal ends outward, the length of the buffer members in the direction perpendicular to the planar direction of the base is longer than the length of the flange members in the direction perpendicular to the planar direction of the base, and the length of the brush members in the direction perpendicular to the planar direction of the base is equal to or greater than the length of the buffer members in the direction perpendicular to the planar direction of the base.

[0010] In the brush invention of claim 2, the buffer member is arranged so that one side of the adjacent brush member abuts against both sides of the buffer member, which prevents the brush pieces from spreading out with use and prevents adjacent brush pieces from shifting in the thickness direction. Also, the length of the buffer member in the direction perpendicular to the planar direction of the base is longer than the length of the flange member in the same direction, and the length of the brush member in the direction perpendicular to the planar direction of the base is equal to or greater than the length of the buffer member in the same direction, which prevents the flange member from contacting the work surface due to wear of the brush pieces with use.

[0011] The invention of claim 3 is characterized in that in the invention of claim 1 or 2, the cushioning member is formed by stacking multiple cushioning pieces, which makes it possible to adjust the spread of the brush pieces and the strength of the bristles of the brush bundle.

[0012] The invention of claim 4 is characterized in that, in the invention of claim 3, the buffer pieces are formed of two or more types with different outer diameters. This makes it possible to further adjust the spread of the brush pieces and the strength of the bristles of the brush bundle.

[0013] The invention of claim 5 is characterized in that in the invention of claim 1 or 2, the buffer members are composed of end buffer members arranged in positions where they abut against the side surfaces of the two flange members, and middle buffer members arranged between adjacent brush members. In this way, by using different materials for the end buffer members and the middle buffer members, the brush pieces can be easily spread out, and the effect of preventing adjacent brush pieces in the thickness direction from easily shifting can be maximized.

[0014] The invention of claim 6 is characterized in that, in the invention of claim 1 or 2, the holder has a hole that penetrates from one side surface of the base to the other side surface and a pressing piece that is near the hole and protrudes from one side surface of the base, the brush bundle is inserted into the hole and is bent at approximately the center to extend in the outer circumferential direction along the side surface of the base, and is crimped and fixed to the base by the pressing piece. This allows the brush bundle to be fixed to the base by a simple means and reduces manufacturing costs.

[0015] The invention of claim 7 is characterized in that, in the invention of claim 6, the brush member has two bases, one side of each base is overlapped so that the holes of each base are aligned, and each pressing piece is positioned to protrude from the other side of each base, thereby preventing the brush bundle from bending during use.

[0016] The invention of claim 8 of a power tool is characterized in that it includes the brush according to any one of claims 1 to 7, the shaft member is fixed to the power tool, and the brush rotates around the axis of the shaft member. This makes it possible to prevent the flange member from contacting the work surface, and to reduce spreading and displacement of the brush pieces. [Effects of the Invention]

[0017] The brush inventions of claims 1 and 2 allow the brush pieces to easily spread with use and prevent adjacent brush pieces from easily shifting in the thickness direction. They also prevent the flange members from coming into contact with the work surface due to wear of the brush pieces with use. Furthermore, the inventions of claims 3 and 4 allow the spread of the brush pieces and the strength of the bristles of the brush bundle to be adjusted.

[0018] The invention of claim 5 uses different materials for the end cushioning members and the middle cushioning members, which makes it easier for the brush pieces to spread out and maximizes the effect of preventing adjacent brush pieces in the thickness direction from easily shifting. Also, the invention of claim 6 allows the brush bundle to be fixed to the base by a simple means, reducing manufacturing costs.

[0019] The invention of claim 7 can prevent the brush bundle from bending during use, and the power tool invention of claim 8 can prevent the flange member from contacting the work surface and reduce the spreading and displacement of the brush pieces. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a perspective view of a brush according to a first embodiment of the present invention; FIG. [Figure 2] 1 is a side view of a brush according to a first embodiment; [Figure 3] FIG. 1 is a front view of a brush according to a first embodiment; [Figure 4] (a) is a side view of a brush member according to a first embodiment of the present invention; (b) is a cross-sectional view of the same part; [Figure 5] 1 is a side view of a buffer member constituting a brush according to the present invention; [Figure 6] (a) Front view of the brush of the second embodiment; (b) Front view of the brush of the third embodiment; (c) Front view of the brush of the fourth embodiment. [Figure 7] (a) A cross-sectional view of a second embodiment of the brush member. (b) A cross-sectional view of a third embodiment of the brush member. [Figure 8] (a) A perspective view of a brush according to a fifth embodiment. (b) A cross-sectional view of the same. [Figure 9] 1 is a perspective view of a power tool according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to these embodiments. Fig. 1 is a perspective view of a brush according to a first embodiment of the present invention, Fig. 2 is a side view of the same, and Fig. 3 is a front view of the same. Fig. 4(a) is a side view of a brush member according to the first embodiment that constitutes a brush according to the present invention, and Fig. 4(b) is a cross-sectional view of the same part. Fig. 5 is a side view of a buffer member that constitutes a brush according to the present invention. The first embodiment of the brush according to the present invention will be described below using these figures.

[0022] The brush 10 of the first embodiment includes multiple brush bundles 1, 1·; a base 2 that is generally ring-shaped in side view and has a central hole 2a; the brush bundle 1 is crimped and fixed at its approximate center to a holder 2b provided on the outer periphery of the base 2; and multiple brush members 3, 3 from which both ends of the multiple brush bundles 1, 1· extend radially; a buffer member 4 made of nonwoven fabric or rubber and shaped like a generally disk in side view with a central hole 4a; two flange members 5, each shaped like a generally disk in side view with a central hole 5a; and a generally cylindrical shaft member 6. A rotating shaft 7 is inserted into and fixed to the shaft member 6. The brush bundle 1 is formed by converging multiple brush pieces 1a.

[0023] The multiple brush members 3, 3 are arranged such that a buffer member 4 is placed between at least one adjacent brush member 3, 3 so that one side of the adjacent brush member 3, 3 abuts against both side surfaces of the buffer member 4, and the two flange members 5, 5 are arranged so as to abut against each side of the brush members 3, 3 or buffer members 4, 4 (brush members 3, 3 in the first embodiment) located at both ends, and the shaft member 6 is inserted into each of the hole portions 5a, 2a, 4a, 2a, 5a of the multiple brush members 3, 3, buffer member 4 and two flange members 5, 5, and fixed to the two flange members 5, 5 by expanding both longitudinal ends toward the outer periphery.

[0024] The outer diameter of the buffer member 4 is larger than that of the flange member 5, and the outer diameter of the brush member 3 is equal to or larger than that of the buffer member 4. This prevents the flange member 5 from contacting the workpiece surface due to wear of the brush pieces 1a during use. Furthermore, the buffer member 4 is positioned so that both sides of the buffer member 4 abut one side of the adjacent brush members 3, 3. This prevents the brush pieces 1a from easily spreading during use and from easily shifting between adjacent brush pieces 1a in the thickness direction. Furthermore, if a mixed region occurs where the tips of the brush pieces 1a of the brush members 3, 3 spread and overlap each other, the flexibility of the brush pieces 1a will be impaired in the mixed region, and the individual performance of the brush pieces 1a will not be fully demonstrated. Therefore, it is desirable to avoid the mixed region.

[0025] 4(a) and 4(b), the holder 2b of the base 2 has a hole 2c that penetrates from one side surface of the base 2 to the other side surface, and a pressing piece 2d that is located near the hole 2c and protrudes from one side surface of the base 2. The brush bundle 1 is inserted into the hole 2c, and the brush bundle 1 is bent at approximately the center and extends outward along the side surface of the base 2, and is fixed by pressure to the base 2 by the pressing piece 2d. This makes it possible to fix the brush bundle 1 to the base 2 by simple means, thereby reducing manufacturing costs.

[0026] FIG. 6(a) is a front view of a brush according to a second embodiment. The brush 20 of the second embodiment is composed of end buffer members 4B, 4B positioned where the buffer members abut against the side surfaces of the two flange members 5, 5, and a middle buffer member 4A positioned between adjacent brush members 3, 3. By using different materials for the end buffer members 4B, 4B and the middle buffer member 4A, the brush pieces 1a can be easily spread and the effect of preventing adjacent brush pieces 1a from easily shifting in the thickness direction can be maximized. Furthermore, the end buffer members 4B, 4B prevent the brush members 3, 3 from directly abutting the flange members 5, 5, thereby preventing bristles from breaking or breaking. Furthermore, in the brush 20 of the second embodiment, the outer diameter of the middle buffer member 4A is larger than the outer diameter of the end buffer members 4B, 4B. As a result, the end buffer members 4B, 4B have the minimum outer diameter necessary to prevent direct contact between the brush members 3, 3 and the flange members 5, 5, and the middle buffer member 4A has an outer diameter that indicates the limit of use at which the workpiece surface and the flange members 5, 5 do not come into contact during use even if the brush pieces 1a, 1a are worn, thereby providing a brush that is highly safe.

[0027] FIG. 6(b) is a front view of a brush according to a third embodiment. In the brush 30 of the third embodiment, the buffer member 14 is formed by stacking multiple buffer pieces 14a, 14b, and 14c. The buffer pieces 14a, 14b, and 14c are formed of two or more types with different outer diameters, with the central buffer piece 14a having a smaller outer diameter and the outer buffer piece 14c having a larger outer diameter. This allows for adjustment of the spread of the brush pieces 1a and the stiffness of the bristles of the brush bundle 1. In the third embodiment, the bristles of the brush bundle 1 are gradually weakened from the base to the tip, dispersing the stress applied to the brush pieces 1a during use and preventing bristles from breaking.

[0028] FIG. 6(c) is a front view of a brush according to a fourth embodiment. In the brush 40 of the fourth embodiment, the buffer member 15 is formed by stacking multiple buffer pieces 15a, 15b, and 15c. The buffer pieces 15a, 15b, and 15c are formed of two or more types with different outer diameters, with the central buffer piece 15a having a larger outer diameter and the outer buffer piece 15c having a smaller outer diameter. This allows for adjustment of the spread of the brush pieces 1a and the stiffness of the bristles of the brush bundle 1. In the fourth embodiment, the buffer piece 15c adjacent to the brush bundle 1 is made smaller, thereby increasing the flexibility of the brush pieces 1a. Furthermore, by setting the outer diameter of the central buffer piece 15a to the outer diameter that indicates the limit of use to prevent the workpiece surface from coming into contact with the flange members 5, 5 during use, a highly safe brush can be provided.

[0029] 7(a) is a cross-sectional view showing a second embodiment of the brush member. The brush member 13 of the second embodiment has two bases 12, 12, with one side of each base 12 overlapping so that the holes 12c, 12c of the bases 12, 12 are aligned, and the pressing pieces 12d, 12d are positioned so that they protrude from the other side. A single brush bundle 11 is inserted through the holes 12c, 12c of each base 12, 12, and is bent at approximately its center, extending circumferentially along the side of each base 12, 12, and is fixed to the base 12, 12 by the pressing pieces 12d, 12d. This prevents the brush bundle 11 from bending during use.

[0030] 7(b) is a cross-sectional view showing a third embodiment of the brush member. The brush member 23 of the third embodiment has two bases 22, 22, with one side of each base 22 overlapping so that the holes 22c, 22c of the bases 22, 22 are aligned, and the pressing pieces 22d, 22d are positioned so that they protrude from the other side. Two brush bundles 21, 21 are inserted through the holes 22c, 22c of the bases 22, 22, and the approximate centers of the two brush bundles 21, 21 are bent to extend circumferentially along the side surfaces of the bases 22, 22, and are fixed to the bases 22, 22 by the pressing pieces 22d, 22d. This prevents the brush bundles 21, 21 from bending during use.

[0031] Fig. 8(a) is a perspective view of a brush according to a fifth embodiment, and Fig. 8(b) is a cross-sectional view thereof. The brush 50 of the fifth embodiment is an example of a cup brush, comprising a plurality of brush bundles 51, 51··, a base 52 having a generally ring-shaped planar configuration with a central hole 52a, and a plurality of brush members 53, 53, each of which has its end portion extending perpendicular to the planar direction of the base 52. The brush bundle 51 is fixed at its approximate center to a holder 52b provided on the outer periphery of the base 52, a buffer member 54 made of a nonwoven fabric or rubber material and having a generally cup-shaped cross section with a central hole 54a, two flange members 55 each having a generally cup-shaped cross section with a central hole 55a, and a generally cylindrical shaft member 56. The brush bundle 51 is formed by converging a plurality of brush pieces 51a.

[0032] The multiple brush members 53, 53 are arranged such that a buffer member 54 is placed between at least one adjacent brush member 53, 53 so that one side of the adjacent brush member 53, 53 abuts against both sides of the buffer member 54, and the two flange members 55, 55 are arranged so that they abut against each side of the brush member 53 or buffer member 54 located at both ends, and the shaft member 56 is inserted into each hole of the multiple brush members 53, the buffer member 54, and the two flange members 55, 55, and fixed to the two flange members 55, 55 by expanding both longitudinal ends toward the outer periphery.

[0033] The length of the buffer member 54 in the direction perpendicular to the planar direction of the base 52 is longer than the length of the flange member 55 in the direction perpendicular to the planar direction of the base 52, and the length of the brush member 53 in the direction perpendicular to the planar direction of the base 52 is greater than or equal to the length of the buffer member 54 in the direction perpendicular to the planar direction of the base 52.

[0034] In the brush 50 of the fifth embodiment configured as described above, the length of the buffer member 54 in the direction perpendicular to the planar direction of the base 52 is longer than the length of the flange member 55 in the same direction, and the length of the brush member 53 in the direction perpendicular to the planar direction of the base 52 is equal to or greater than the length of the buffer member 54 in the same direction, so that it is possible to prevent the flange member 55 from contacting the work surface due to wear of the brush pieces 51a with use. Also, since the buffer member 54 is arranged so that one side of the adjacent brush members 53, 53 abuts against both sides of the buffer member 54, it is possible to prevent the brush pieces 51a from easily spreading with use and to prevent adjacent brush pieces 51a, 51a from easily shifting in the thickness direction.

[0035] It should be noted that various configurations described in the first to fourth embodiments of the brush according to the present invention can be appropriately selected and applied to the brush 50 of the fifth embodiment. Also, by modifying the configuration of the brush member of the second and third embodiments described in Figures 7(a) and 7(b) so that both ends of the multiple brush bundles extend in a direction perpendicular to the plane direction of the base, it is possible to apply this in place of the brush member in the brush 50 of the fifth embodiment.

[0036] 9 is a perspective view showing a power tool according to the present invention. The power tool 60 according to the present invention has a tool main body 61 incorporating a rotary motor, a grip 63 equipped with a switch 62 for starting the rotary motor, and an attachment 64 equipped with a rotary shaft 7. The brush 10 according to the present invention is attached by fixing the shaft member 6 of the brush 10 to the rotary shaft 7, so that the brush 10 can rotate about the axis of the shaft member 6. Note that, instead of the brush 10 according to the first embodiment, any of the brushes according to the second to fifth embodiments described above can be attached to the power tool 60. [Industrial Applicability]

[0037] The brush and the power tool according to the present invention are used as a brush and a power tool equipped with a brush for performing various types of processing on a surface to be processed. [Explanation of symbols]

[0038] 1, 11, 21, 51 brush bundles 1a, 51a Brush pieces 2, 12, 22, 52 bases 2a, 52a Hole in base 2b, 52b holding part 2c, 12c, 22c holes 2d, 12d, 22d pressing piece 3, 13, 23, 53 Brush members 4, 14, 24, 54 Buffer material 4A Middle cushioning material 4B End buffer member 4a, 54a Hole in cushioning material 5, 55 Flange member 5a, 55a Hole in flange member 6, 56 Shaft member 7 Rotation Axis 10, 20, 30, 40, 50 brushes 14a, 14b, 14c, 15a, 15b, 15c buffer piece 60 Power tools 61 Tool body 62 Switch 63 Gripping part 64 Mounting part

Claims

1. a plurality of brush members each having a plurality of brush bundles and a base having a generally ring-shaped configuration in a side view with a hole in the center, the brush bundles being crimped and fixed at their approximate centers to a holder provided on the outer periphery of the base, and both ends of the brush bundles extending radially; a cushioning member made of a nonwoven fabric material or a rubber material and formed in a generally circular plate shape in side view with a hole in the center; Two flange members each having a generally circular plate shape in side view and each having a hole in the center; A brush having a substantially cylindrical shaft member, The plurality of brush members are arranged such that the buffer member is disposed between at least one adjacent brush member such that one side surface of the adjacent brush member abuts against both side surfaces of the buffer member, the two flange members are arranged to abut against the respective side surfaces of the brush member or buffer member located at both ends, the shaft member is inserted into the holes of the plurality of brush members, the buffer member, and the two flange members, and fixed to the two flange members by expanding both ends of the shaft member in the longitudinal direction toward the outer periphery, The outer diameter of the buffer member is larger than the outer diameter of the flange member, The outer diameter of the brush member is equal to or greater than the outer diameter of the buffer member.

2. a plurality of brush members each having a plurality of brush bundles and a base having a generally ring-shaped planar view with a hole in the center, the brush bundles being crimped and fixed at their approximate centers to a holder provided on the outer periphery of the base, and both ends of the brush bundles extending in a direction perpendicular to the planar direction of the base; a cushioning member made of a nonwoven fabric material or a rubber material, which is formed in a generally cup-shaped cross section with a hole in the center; Two flange members each having a generally cup-shaped cross section with a hole in the center; A brush having a substantially cylindrical shaft member, The plurality of brush members are arranged such that the buffer member is disposed between at least one adjacent brush member such that one side surface of the adjacent brush member abuts against both side surfaces of the buffer member, the two flange members are arranged to abut against the respective side surfaces of the brush member or buffer member located at both ends, the shaft member is inserted into the holes of the plurality of brush members, the buffer member, and the two flange members, and fixed to the two flange members by expanding both ends of the shaft member in the longitudinal direction toward the outer periphery, a length of the buffer member in a direction perpendicular to a plane of the base is longer than a length of the flange member in a direction perpendicular to the plane of the base; The length of the brush member in the direction perpendicular to the plane of the base is equal to or greater than the length of the buffer member in the direction perpendicular to the plane of the base.

3. 3. The brush according to claim 1, wherein the buffer member is formed by stacking a plurality of buffer pieces.

4. 4. The brush according to claim 3, wherein the buffer pieces are formed of two or more types having different outer diameters.

5. 3. A brush according to claim 1, wherein the buffer members are composed of end buffer members arranged at positions contacting the side surfaces of the two flange members, and a middle buffer member arranged between the adjacent brush members.

6. the holding portion has a hole portion that penetrates from one side surface side to the other side surface side of the base, and a pressing piece that is located near the hole portion and protrudes toward the one side surface side of the base, 3. The brush according to claim 1, wherein the brush bundle is inserted through the hole, and the brush bundle is bent at a substantially central portion thereof to extend in a circumferential direction along a side surface of the base, and is fixed to the base by the pressing piece.

7. 7. A brush according to claim 6, wherein the brush member has two bases, one side of each of which is placed on top of the other so that the holes of the bases are aligned, and the pressing pieces are positioned so as to protrude from the other side of the base.

8. A power tool equipped with the brush according to any one of claims 1 to 7, wherein the shaft member is fixed to the power tool, and the brush rotates around the axis of the shaft member.

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