brush

Abstract

To provide a brush which can reliably prevent detachment and breakage of a bristle material and enables smooth fitting of a brush base to a groove part.SOLUTION: A brush 10 fit into a groove part formed on a brush base includes a bristle material bundle 2 where a plurality of bristle materials 1,1 ... are bundled and a base 3 which fixes one end 2c of the bristle material bundle and fits into the groove part of the brush base. A rubber resin film 4 is continuously formed on an outer peripheral surface 2a of a base side of the bristle material bundle and an upper surface 3a of the base. An adhesive 5 is filled in the inside 2b of the base side of the bristle material bundle and is solidified. A material of the rubber resin film 4 is different from a material of the adhesive 5.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a brush that is assembled and used in various devices and used as various industrial and household products.

Background Art

[0002] Conventionally, a brush in which hair materials of a thermoplastic resin are bundled has been known (Patent Document 1).

[0003] The brush described in Patent Document 1 forms a fiber bundle by bundling fibers made of a heat-melting material, presses the lower end surface of this fiber bundle against the upper surface of a metal brush base heated to a temperature not lower than the heat-melting temperature of the heat-melting material to melt the lower end surface portion of the fiber bundle, and then cools the brush base to fix the fiber bundle to the brush base. A thin layer of a heat-melting adhesive is previously applied to the upper surface of the brush base to surely fix the fiber bundle to the brush base.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the brush described in Patent Document 1, since the adhesive does not sufficiently penetrate into the root portion of the fiber bundle in the thin layer of the heat-melting adhesive applied to the upper surface of the brush base, it has a problem that it is not sufficient to prevent the occurrence of fiber pulling out or breakage.

[0006] On the other hand, when the amount of the adhesive filled in the root portion of the fiber bundle is increased, an adhesive lump in which the solidified adhesive remains on the outer peripheral surface of the root portion of the fiber bundle or the side surface of the brush base is formed, and thus it has a problem that it becomes difficult to fit into the groove formed in the brush base as it is.

[0007] The present invention aims to solve the aforementioned conventional problems and to provide a brush that can reliably prevent shedding or breakage of bristles, and that can be smoothly fitted into the groove of the brush holder. [Means for solving the problem]

[0008] To solve the aforementioned conventional problems, the invention of claim 1 is a brush that fits into a groove formed in a brush base, the brush comprising a bundle of bristles formed by gathering a plurality of bristles together, and a base that fixes one end of the bundle of bristles and fits into the groove in the brush base, The base comprises a base portion and a reinforcing portion formed to cover the outer circumferential surface of the base portion and the outer circumferential surface at the root end of the bristle bundle. The bristle bundle is made of thermoplastic resin, and the base is formed by melt-bonding one end of the bristle bundle. A rubber resin film is continuously formed on the outer circumferential surface at the base of the bristle bundle and on the upper surface of the base, and adhesive is filled and solidified inside the base of the bristle bundle, characterized in that the rubber resin film and the solidified adhesive are made of different materials.

[0009] In the invention of claim 1, the adhesive is filled inside the base of the bristle bundle, which reliably prevents the bristles from falling out or breaking. Furthermore, since a rubber resin film is continuously formed on the outer circumferential surface of the base of the bristle bundle and the upper surface of the base, it is less likely for adhesive to accumulate and remain in that area, allowing for smooth fitting into the groove of the brush holder. In addition, since the outer circumferential surface of the base of the bristle bundle is covered with a rubber resin film, the outward spreading of the bristles can be suppressed, and a sufficient amount of adhesive can be filled in. Furthermore, since one end of the bristle bundle and the outer surface of the root side are covered by the base and reinforcing part, the shedding and breakage of the bristles can be further prevented. In addition, the brush can be stabilized when fitted into the brush holder. Moreover, compared to cases where metal fittings are used for the base, it is lighter, and the manufacturing and disposal processes can be shortened, reducing costs. Furthermore, the shedding and breakage of bristles can be further prevented.

[0010] The invention of claim 2 is characterized in that, in the invention of claim 1, the plurality of bristles arranged on the outer circumference are fixed to and integrated with a rubber resin film. This further suppresses the outward spreading of the bristles.

[0013] Claim 3 The invention is as described in claim 1 or 2In this invention, the base is characterized by having a void inside, and the void is filled with adhesive. This makes it possible to increase the strength of the base.

[0014] Claim 4 The invention is as follows: 3 In either of the inventions, the upper end surface of the rubber resin film and the adhesive filling surface are substantially the same. This further prevents the accumulation of adhesive on the outer surface at the base of the bristle bundle, further prevents the bristles from falling out or breaking, and further suppresses the outward spreading of the bristles.

[0015] Claim 5 The invention is as follows: 3 In either of the inventions, the adhesive filling surface is characterized in that the central side is higher than the outer surface side of the bristle bundle. This increases the adhesive area on the central side of the bristle bundle, thereby increasing the strength of the brush and further preventing shedding or breakage of the bristles on the central side.

[0016] Claim 6 The invention is as follows: 5 In either of the inventions, the rubber resin film is characterized by containing a masking paint. This allows for effective utilization of the elasticity and adhesive properties of the rubber in the masking paint.

[0017] Claim 7 The invention is as follows: 6 In either of the inventions, the solidified adhesive is characterized by containing an epoxy resin. The low viscosity, high strength, and high durability of the epoxy resin can be effectively utilized.

[0018] Claim 8 The invention is as follows: 7In any of the inventions, the hair materials constituting the hair material bundle are characterized by having substantially wavy portions formed in the longitudinal direction or uneven portions formed on the outer surface. As a result, it becomes easier to hold the adhesive material inside the hair material bundle, and it is possible to more reliably prevent the hair materials from coming out or breaking.

Advantages of the Invention

[0019] The invention of the brush according to claim 1 can reliably prevent the hair materials from coming out or breaking, make it difficult for adhesive lumps to remain adhered, and smoothly fit into the groove of the brush base. In addition, it is possible to suppress the outward spread of the hair materials and fill a sufficient amount of adhesive material. Further, the invention of claim 2 can further suppress the outward spread of the hair materials.

[0020] Claim 1 [[ID=IS13]]The invention can further prevent the hair materials from coming out and breaking, and can stabilize the brush when fitting the brush into the brush base. Further, the invention of claim 1 can achieve weight reduction compared to the case of using a metal fitting for the base, shorten the processes during manufacturing and disposal, and reduce costs. In addition, it is possible to further prevent the hair materials from coming out or breaking.

[0021] Claim 3 The invention can increase the strength of the base. Further, the invention of claim 4 can further prevent the generation of adhesive lumps on the outer peripheral surface of the root side of the hair material bundle, further prevent the hair materials from coming out and breaking, and further suppress the outward spread of the hair materials. Further, the invention of claim 5 can increase the strength of the brush and further prevent the hair materials in the central side from coming out or breaking.

[0022] Claim 6 The invention can effectively utilize the elasticity and adhesiveness of the rubber of the masking paint. Further, the invention of claim 7This invention can effectively utilize the low viscosity, high strength, and high durability of epoxy resin. 8 This invention makes it easier to retain the adhesive inside the bundle of bristles, and more reliably prevents the bristles from falling out or breaking. [Brief explanation of the drawing]

[0023] [Figure 1] (a) Perspective view of the brush according to the present invention (b) Perspective view of the brush according to the present invention viewed from the base side [Figure 2] (a) Cross-sectional view AA of Figure 1 (b) Cross-sectional view BB of Figure 1 (c) Cross-sectional view CC of Figure 1 [Figure 3] A perspective view showing the brush according to the present invention fitted into a brush holder. [Figure 4] (a) to (c) Cross-sectional views showing other embodiments of the brush according to the present invention [Modes for carrying out the invention]

[0024] Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to these embodiments. Figure 1(a) is a perspective view of the brush according to the present invention, and Figure 1(b) is a perspective view of the brush from the base side. Furthermore, Figure 2(a) is a cross-sectional view of Figure 1, Figure 2(b) is a cross-sectional view of Figure 1, and Figure 2(c) is a cross-sectional view of Figure 1, specifically section AA. A first embodiment of the brush according to the present invention will be described below using these figures.

[0025] The brush 10 according to the present invention is a brush that fits into a groove formed in a brush base, and comprises a bundle of bristles 1, 1... formed by bundling together a plurality of bristles, and a base 3 that fixes one end of the bundle of bristles 2 and fits into the groove in the brush base.

[0026] Furthermore, a rubber resin film 4 is continuously formed on the outer peripheral surface 2a at the base of the bristle bundle and the upper surface 3a of the base, and adhesive 5 is filled and solidified inside 2b at the base of the bristle bundle. This makes it less likely for adhesive buildup to occur where the adhesive 5 adheres and allows for smooth fitting into the groove of the brush base.

[0027] Furthermore, the rubber resin film 4 and the solidified adhesive 5 are made of different materials, and the rubber resin film 4 preferably contains masking paint, which allows for effective utilization of the elasticity and adhesive properties of the rubber in the masking paint. As an example of masking paint, MR-54 from Tokan Corporation can be cited. In addition, the adhesive 5 preferably contains epoxy resin, which allows for effective utilization of the low viscosity, high strength, and high durability of epoxy resin.

[0028] The procedure for forming the rubber resin film 4 and filling it with adhesive 5 is as follows. First, the rubber resin film 4 is applied to the outer peripheral surface 2a at the base of the bristle bundle and the upper surface 3a of the base 3 in a continuous manner. Then, the tip of a syringe filled with adhesive 5 is inserted into the center 2d of the bristle bundle, and the adhesive 5 is filled into the gap formed in the bristle bundle 2.

[0029] Furthermore, as shown in Figure 2(c), by fixing and integrating the multiple bristles 1, 1... arranged on the outer periphery to the rubber resin film 4, the outward spreading of the bristles can be further suppressed. In addition, since the adhesive 5 can be filled into the gap formed between the multiple bristles 1, 1... arranged on the outside and the rubber resin film 4, the multiple bristles 1, 1... arranged on the outer periphery can be prevented from falling out or breaking. If there are irregularities on the outer periphery surface 2a at the base of the bristle bundle, applying the rubber resin film 4 with a uniform thickness will result in irregularities being formed on the outer surface of the rubber resin film 4. However, it is also possible to create a rubber resin film 4 with a smooth outer surface by fitting a viscosity-adjusted rubber resin liquid into a mold and allowing it to solidify.

[0030] Furthermore, in the brush 10 according to the present invention, the rubber resin film 4 covers the outer peripheral surface 2a at the base of the bristle bundle 2 without distorting its outer shape, and is fixed to the multiple bristles 1, 1, etc. arranged on the outer peripheral side. This makes it difficult for the rubber resin film 4 to shift and prevents the bristles 1, 1, etc. from tilting.

[0031] The base 3 has a base portion 3b and a reinforcing portion 3d formed to cover the outer circumferential surface 3c of the base portion and the outer circumferential surface 2a at the root end of the bristle bundle. As a result, one end 2c of the bristle bundle and the outer circumferential surface 2a at the root end are covered by the base portion 3b and the reinforcing portion 3d, which further prevents the bristles 1 from falling out or breaking. In addition, the brush 10 can be stabilized when fitted into the brush holder.

[0032] The bristles 1 constituting the bristle bundle 2 are made of thermoplastic resin, and the base 3 is formed by melt-bonding one end 2c of the bristle bundle. This reduces weight compared to cases where metal fittings are used for the base, shortens the manufacturing and disposal processes, and reduces costs. It also further prevents the bristles 1 from falling out or breaking. As will be described later, the present invention also includes cases where only a part of the base 3, rather than the entire base 3, is formed by melt-bonding one end 2c of the bristle bundle.

[0033] Preferably, the height of the reinforcing portion 3d is at least twice the thickness of the base portion 3b. This prevents the bristles from collapsing and increases strength. In the first embodiment, the bristle bundle 1 of the brush 10 is rectangular in plan view, but is not limited to this, and can be made into various shapes such as circular, star-shaped, or triangular.

[0034] An example of the manufacturing procedure for the brush 10 of the first embodiment is shown below. (1) First, put material 1 into the formwork. (2) Next, the iron plate heated by the heater is brought into contact with the bundle of bristles 2 from one side. (3) Next, slide the iron plate to melt one end 2c of the hair bundle with heat. (4) Next, the molten material flows into the groove (the part that forms the reinforcement part 3d) provided at the inner end of the formwork. (5) Next, the iron plate is moved to the other side (the excess bristles 1 are trimmed off), and the bristles 1 are pressed down from above with the iron plate to form the base 3b. (6) Next, after confirming that the molten bristles are filled into the grooves forming the reinforcement portion 3d, the iron plate is removed and the bristles 1 is cooled. (7) Finally, the burrs formed on the base portion 3b and the reinforcing portion 3e are cut off with a cutting tool or the like to complete the brush 10 in the stage before the formation of the rubber resin film 4 and the filling of the adhesive material 5.

[0035] The base 3 has a void 6 that connects the outer surface and the interior, and this void 6 is filled with adhesive 5. This increases the strength of the base 3.

[0036] As shown in Figure 2(a), on the outer circumferential surface 2a of the bristle bundle, the upper end surface 4a of the rubber resin film 4 and the filling surface 5a of the adhesive 5 are made to be approximately the same. This further prevents the accumulation of adhesive on the outer circumferential surface 2a at the base of the bristle bundle and on the upper surface 3a of the base.

[0037] Furthermore, as shown in Figure 2(b), the filling surface 5b of the adhesive 5 may be formed such that the central 2d side is higher than the outer circumferential surface 2a side of the bristle bundle. This increases the adhesive area on the central 2d side of the bristle bundle, thereby increasing the strength of the brush 10 and further preventing the shedding or breakage of the bristles 1 on the central 2d side. It should also be possible to make the upper end surface 4a of the rubber resin film 4 and the filling surface 5a of the adhesive 5 substantially the same on the outer circumferential surface 2a side of the bristle bundle and on the inside of the bristle bundle, and this is also included in the present invention.

[0038] The bristles 1 that make up the bristle bundle 2 have a roughly wave-shaped portion 7 formed in the longitudinal direction. This makes it easier to hold the adhesive 5 inside the bristle bundle 2 and more reliably prevents the bristles 1 from falling out or breaking.

[0039] Figure 3 is a perspective view showing the brush according to the present invention fitted into the brush holder. The brush holder 11 has a plurality of brushes 10 detachably attached to an annular base member 12. The base member 12 has an insertion hole 12a and a groove 12b formed on the edge of the insertion hole 12a. After fitting the brush base 3 into the groove 12b and sliding it in the direction of the arrow, the brush 10 is fixed to the base member 12 by attaching a ring-shaped retaining member (not shown) to the inner circumference. Although the configuration shows multiple brushes 10, 10, ... fixed to the brush holder 11, there may be only one brush 10.

[0040] Here, if adhesive buildup is formed on the outer peripheral surface 2a at the base of the bristle bundle of the brush 10 and on the upper surface 3a of the base, it becomes difficult to fit the brush into the groove 12b of the base 3 and to slide it in the direction of the arrow. However, this problem can be solved by the present invention. That is, in the brush 10 of the present invention, a rubber resin film 4 is continuously formed on the outer peripheral surface 2a at the base of the bristle bundle and on the upper surface 3a of the base, so the adhesive 5 does not adhere to the outside of the rubber resin film 4 and no adhesive buildup is formed.

[0041] Furthermore, since the rubber resin film 4 is elastic, when it comes into contact with the groove 12b during fitting, the rubber resin film 4 deforms, making fitting smoother and preventing damage to the brush base 11 and the groove 12b. In addition, after the brush 10 is attached to the brush base 11, the rubber resin film 4 adheres tightly to the groove 12b, preventing the brush bundle from shifting or tilting, and allowing it to perform to its full potential during polishing and cleaning.

[0042] Figure 4(a) is a cross-sectional view showing a brush of the second embodiment. In the brush 20 of the second embodiment, the base 23 is made of a different resin from the bristle bundle 2, and one end 2c of the bristle bundle is fixed with the resin of the base 23 to prevent the bristles from falling out. Since no metal fittings are used in this brush 20, it is lightweight and easy to dispose of. In addition, the thickness of the base 23 can be reduced, and the thickness of the base member constituting the brush stand described above can also be reduced. The other configurations are the same as those of the brush 10 of the first embodiment, so their explanation is omitted.

[0043] Figure 4(b) is a cross-sectional view showing a brush according to the third embodiment. In the third embodiment, the brush 30, like the brush 10 of the first embodiment, has bristles 1 that make up the bristle bundle 2 made of thermoplastic resin, and the base portion 33b of the base 33 is formed by melt-bonding one end 2c of the bristle bundle. On the other hand, the reinforcing portion 33d is made of a metal ring, and one end of this metal ring 33d is bonded to the base portion 33b. By using a metal ring for the reinforcing portion 33d, the area covering the outer peripheral surface 2a on the root side of the bristle bundle can be increased, and the occurrence of shedding or breakage of the bristles 1 can be reliably prevented. Furthermore, the bristles 1 that make up the bristle bundle 2 have a substantially wave-shaped portion 7 formed in the longitudinal direction, and since the bristles 1 contain abrasive grains, an uneven shape portion 8 is formed on the outer surface. This makes it easier to hold the adhesive 5 inside the bristle bundle 2 and can more reliably prevent the shedding or breakage of the bristles 1. Furthermore, instead of the roughly wavy portion 7, a straight bristle material may be used, and an uneven portion 8 may be formed on the outer surface of the bristle material; this configuration is also included in the present invention. The other configurations are the same as those of the brush 10 of the first embodiment, so their description will be omitted.

[0044] Figure 4(c) is a cross-sectional view showing a brush according to the fourth embodiment. The brush 40 of the fourth embodiment is formed from a metal base 43 with a U-shaped cross-section, in which a base portion 43b and a reinforcing portion 43d are integrally formed. One end 2c of the bristle bundle is inserted into a fixing hole 9 of the base 43 and fixed with adhesive 5. This configuration allows for smooth fitting between the base 43 and the groove portion of the brush stand. The other configurations are the same as those of the brush 10 of the first embodiment, so their description is omitted. [Industrial applicability]

[0045] The brush according to the present invention is used when incorporated into various types of equipment and is used in various industrial and consumer products. [Explanation of Symbols]

[0046] 1 Hair material 2 Hair bundle 2a Outer surface at the base 2b Inside the root side 2c one end 2d center 3, 23, 33, 43 base 3a Top side 3b, 33b, 43b base 3c Outer surface 3d, 33d, 43d reinforcement part 4. Rubber resin membrane 4a Top end surface 5 Adhesive 5a, 5b Filling surface 6 Cavity 7. Approximately wave-shaped section 8 Uneven part 9 Fixing hole 10, 20, 30, 40 brushes 11 Brush stand 12 Base member 12a Insertion hole 12b Groove

Claims

1. A brush that fits into a groove formed in the brush base, The aforementioned brush comprises a bundle of bristles formed by gathering multiple bristles together, It has a base that fixes one end of the bundle of bristles and fits into the groove of the brush stand, The base has a base portion and a reinforcing portion formed to cover the outer circumferential surface of the base portion and the outer circumferential surface on the root side of the hair bundle. The bristles constituting the bristle bundle are made of thermoplastic resin, and the base is formed by melt-bonding one end of the bristle bundle. A brush characterized in that a rubber resin film is continuously formed on the outer circumferential surface at the base of the bristle bundle and on the upper surface of the base, and adhesive is filled and solidified inside the base of the bristle bundle, and the rubber resin film and the solidified adhesive are made of different materials.

2. The brush according to claim 1, characterized in that multiple bristles arranged on the outer circumference are fixed and integrated with a rubber resin film.

3. The brush according to claim 1 or 2, characterized in that the base has a void inside, and the void is filled with adhesive.

4. The brush according to any one of claims 1 to 3, characterized in that the upper surface of the rubber resin film and the adhesive filling surface are substantially the same.

5. The brush according to any one of claims 1 to 3, characterized in that the adhesive filling surface is formed such that the central side is higher than the outer surface side of the bristle bundle.

6. The brush according to any one of claims 1 to 5, characterized in that the rubber resin film contains masking paint.

7. The brush according to any one of claims 1 to 6, characterized in that the solidified adhesive contains epoxy resin.

8. The brush according to any one of claims 1 to 7, characterized in that the bristles constituting the bristle bundle have a substantially wave-shaped portion formed in the longitudinal direction or an uneven-shaped portion formed on the outer surface.

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