JPH09313255A - Bristle-rounding device for brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a rounding process for all the bristle tips with different heights by a method wherein a grinding element having a tapered-in edge, and a grinding element driving unit to perform a rounding process for bristle tips at a low part by slidably bringing the edge into contact with the bristle tips at the low part under a state wherein the edge of the grinding element is being moved, are provided. SOLUTION: A toothbrush 14 is cut into a mountain-valley shape by a bristle cutter, and the bristle tips 14a1 are ground into a conical shape by a conical grinder of a conical grinder rounding device. Then, the bristle tips are made into a semi-spherical shape by a flat grinder rounding device. Then, at a valley-shaped part grinder rounding device, the peripheral edge part 40c of a grinder 40 being rotated, is pressed to the bristle tips 14a1 of the toothbrush 14, and the grinder 40 is made to reciprocate at a right angle to the longitudinal direction of the toothbrush 14. By doing so, the peripheral edge part 40c of the grinder 40 having a tapered-in edge, is slidably brought into contact with the bristle tips at a valley part 14e of the brush, and a rounding process for the bristle tips, is performed. As a result, even the valley part 14e of the brush 14, to which a conical grinder and a rotary flat grinder cannot reach, can be surely rounded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for rounding the bristle tips of a brush (brush) such as a toothbrush in which the tips of toothbrushes in which bristles are bundled are cut into a valley shape or a chevron shape.

[0002]

2. Description of the Related Art Conventionally, most toothbrush bristles (hair bristles, filaments, staples, etc.) are made of nylon or other synthetic resin, but a rotary cutter or the like is used to adjust the length after the bristles are planted on the brush stand. The hair ends are cut with. In this case, the cut surface has an acute angle when cut, so if you use it without processing it may cause damage to the gums with the sharp tips of the hair, so do the processing to round the tip of the hair. To be done. Various proposals have heretofore been made for this rounding process, and a rounding process is performed by applying a rotating polishing body (grinding stone) to the tips of the hairs.

As a conventional technique for such processing, a polishing body having a plurality of L-shaped protrusions is used (Japanese Patent Laid-Open No. 61-61).
No. 16707), the tip of the bristles is polished into a tapered shape and a rounded tip (disclosed in JP-A-3-198808),
Using a cylindrical grinder (Japanese Patent Publication No. 56-28527)
(Disclosed in Japanese Patent Publication No. 6-95963) and the like, which uses a pair of disk-shaped polishing bodies.

As shown in FIG. 10 (a), the toothbrush is
Usually, the tips (bristles c) of the bristles planted in the toothbrush body a are evenly cut, but today, as shown in (b) of FIG. There is a so-called mountain cutting shape (mounting cut) in which the bristle tips are formed in a ridge-valley shape having irregularities so that the hair tips reach between the teeth.

[0005]

However, when the above-mentioned toothbrush having the bristle-shaped bristle tips is subjected to a treatment for rounding the bristle tips according to the conventional technique, in the case of using the polishing body d, as shown in FIG.
As shown in FIGS. (A) and (b), a polishing body is sufficiently hit against the top e of the crest of the bristle tip for rounding, but the valley portion f of the bristle tip is hardly hit, particularly at the bottom of the trough. Since it does not hit f1 at all, there is a problem that the rounded end of the valley e cannot be rounded.

[0006] In addition, in the above-mentioned ridge-and-valley-shaped hair rounding treatment, a technique of applying hot air to the above-mentioned hair ends to melt them to form spherical objects (Japanese Patent Publication No. 6-57176), and applying a laser beam to the hair ends for rounding It is conceivable to use the processing technology (Japanese Patent Publication No. 6-69409). However, even if this technique is used, applying hot air or laser light originally melts the tips of the hair and rounds it, so the length of the hair is shortened by the amount of melting, and the amount of melting and shortening is controlled. However, there is a problem in that the shape of the peaks and valleys after the rounding process cannot be formed neatly, resulting in an unattractive appearance. Along with that, equipment for applying hot air to the bristle tips of the toothbrush and equipment for applying a laser beam are required, and this kind of equipment is much more expensive than equipment for grinding bodies such as grinders, which causes a problem of cost increase. Occurs. In terms of quality, since the hair is made of resin, there is a concern that it may be deteriorated by heat.

The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to surely perform the rounding process even on the lower portion of the brush which is cut and aligned with a height difference at the bristle tips. Therefore, as with this type of brush, it is possible to round all bristles with different heights to improve the usability of the brush, and to provide a brush bristling device that looks good and prevents cost increases. It is an issue.

[0008]

The present invention has the following constitution in order to solve the above problems. The invention of claim 1 is an apparatus for rounding the bristle tips of a brush in which the bristle tips of a bunch of bristles are cut and aligned at different heights, and a polishing body having a tapered edge portion, In a state in which the edge of the polishing body is moved, the polishing body drive unit that performs the rounding process of the bristle tip of the lower part by sliding the edge to the bristle tip of the lower part This is a device for rounding the tips of brush bristles.

According to a second aspect of the present invention, the polishing body is a rotating body which is rotationally driven by a polishing body drive section with an edge portion as a peripheral edge portion, and the polishing body has large and small peripheral diameters. The brush tip rounding device according to claim 1.

According to a third aspect of the present invention, there is provided a brush rounding device for a brush according to the second aspect, characterized in that the peripheral edge portion of the polishing body is corrugated in such a manner that the peripheral portions thereof are alternately corrugated in the axial direction.

According to the first aspect of the present invention, since the polishing body having the tapered edge portion is moved, the peripheral edge portion is brought into sliding contact with the bristle tip of the lower portion of the brush to perform the rounding treatment of the bristle tip. It is possible to surely round the lower portion of the brush with the bristle tips such as the peaks and valleys that cannot be reached by the rotating flat plate polishing body or the peaks and lowers in the longitudinal direction both ends.

According to the second aspect of the present invention, since the polishing body is a rotating body which is rotationally driven by the polishing body drive section with the edge portion as the peripheral edge portion, the drive system can be configured as a simple one such as a motor,
At the same time, since the polishing body has large and small peripheral diameters, shavings generated during polishing can be efficiently discharged.

According to the third aspect of the present invention, since the peripheral edge portion of the polishing body is corrugated with irregularities alternating in the axial direction, the polishing body contacts the hair tips in the lower portion while touching left and right, and only polishing from the rotational direction. Not only that, the abrasive body also hits the tip of the hair from the side, and rounding treatment can be performed over the entire circumference of the tip. Therefore, the reliability of the rounding process can be further improved.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 9 are explanatory views of a bristle tip rounding device for a toothbrush according to an embodiment of the present invention. 1 is a front view configuration diagram of a bristle tip processing line, FIG. 2 is a side sectional view of a bristle tip rounding device according to the present invention, FIG. 3 is the same front sectional view, FIG.
Is a front sectional view of a disk grindstone rounding device, FIG. 5 is a front sectional view of a conical grindstone rounding device, FIG. 6 is a side view of the line, and FIGS. 7A and 7B are axes of a grindstone (polishing body). FIG. 8A and FIG. 9D are direction views, half-sectional views perpendicular to the axis, FIGS. 8A and 8B are views in the axial direction of a grindstone of another embodiment, half-sectional views perpendicular to the axis, and FIGS.
[Fig. 3] is an explanatory view of a bristle rounding process of a brush according to the present invention.

As shown in FIGS. 1 and 6, in the bristle tip processing line, a large number of toothbrush chucks 10 are arranged and sent by a chain conveyor 12, and the chuck 1
The tip cutter 16 while holding the toothbrush 14 at 0,
The conical whetstone rounding device 18, the flat whetstone rounding device 20, and the valley whetstone rounding device 22 are sequentially polished, and the crests 1 of the bristles (hair bristles) 14a of the toothbrush 14 are sequentially polished.
The 4t and the valley portion 14e are rounded off completely.

As shown in FIGS. 1 and 6, in the bristle tip processing line, the chain conveyor 12 has a frame 24.
From the rounding device 1
Slide stand 26 facing and leaving 8, 20, 22
It is located above. Each of the rounding devices 18, 20, 22 is supported by the frame 24 by a slider 28 that moves up and down in response to a cycle of rounding processing and brush feeding, and the slider 28 is moved up and down by a cam mechanism 30. Further, a rotary mechanism 32 for rotationally driving the table of each of the rounding devices 18, 20, 22 is provided, and the drive motor 3 of the rotary mechanism 32 is provided.
Belt driven from No. 4. The cam mechanism 30 is driven by the drive motor 36 of the chain conveyor 12. Further, each of the rounding devices 18, 20, and 22 is provided with a suction duct 38 that sucks and collects polishing scraps.

2 to 5 show the respective rounding devices 18, 20, 22.
FIG. As shown in FIG. 2 and FIG. 3, in the grindstone rounding device 22 for valleys, the base body 38 is vertically moved by the slider 28 as a whole (for example, about 10 mm). The 38u structure is provided with a guide body 38g that slides along the conveyor line direction (the direction perpendicular to the paper surface of FIG. 2). A servomotor 42 that rotationally drives the grindstone 40 is fixed to the upper part of the guide body 38g, and the grindstone shaft 4 is driven by the motor 42.
0a is driven by the belt 42a.

As shown in detail in FIG. 7, the grindstone 40 is a substantially disk-shaped rotary grindstone, and the periphery (hub portion 40b1) of the insertion hole 40b of the grindstone shaft 40a is thick and The outer periphery is flat, and the peripheral edge portion 40c is tapered to have a triangular cross section. Moreover, the peripheral portion is notched in a rectangular shape at regular intervals, and the portion 40 having the large diameter D1 in the peripheral diameter is formed.
A portion 40c2 having a diameter c1 and a small diameter D2 is formed. By forming the notch in this way, the polishing waste can be efficiently discharged. In the embodiment, the large-diameter portion 40c1 and the small-diameter portion 40c2 are formed in the same angular range, but the notches may not be formed as shown by broken lines, and the notches are formed in different angular ranges. It may have been done.

Further, the peripheral edge portion 40c has a thickness t of 2.0 mm, for example, and grindstones are formed on the inclined surface 40c1 and the peripheral end portion 40c2. As shown in FIG. 8, the grindstone 40 may have a structure in which a peripheral edge portion 40c has a large diameter portion and a small diameter portion, and is corrugated by corrugating alternately in the axial direction. By forming the irregularities in this way, the grindstone 40 hits the left and right sides of the valley portion, and the tips of the tips of the valley are polished from the side, so that the entire circumference of the tips can be sufficiently polished.

As shown in FIG. 4, the plate-shaped grindstone rounding device 20 is a plate-shaped grindstone 20a having a substantially disc shape and having irregularities on the surface.
Is provided on the vertical shaft 20b1 and is rotated by a servomotor 20b parallel to the vertical shaft 20b1. Besides, it has a lower structure similar to that shown in FIGS.

Further, in the conical whetstone rounding device 18, as shown in FIG. 5, the revolution shaft 18b and the rotation shaft 18c of the conical whetstone 18d rotate from the output shaft of the servo motor 18a through a gear. The grindstone 18d rotates and revolves at the same time to polish the hair tips. Other,
It has a lower structure similar to that shown in FIGS.

As shown in FIGS. 1 to 8, in the bristle tip processing line, the chain conveyor 12 is fed while the toothbrush 14 is chucked and held by the chuck 10. At that time, first, each toothbrush 14 is attached to the tip cutter 16
Cut into a mountain valley shape. Then, as shown in FIG. 9A, the tips (bristles 14a1) of the bristles 14a of the toothbrush 14 have just been cut and are sharp.

Then, by sending the chain conveyor 12,
The toothbrush 14 is positioned in the conical whetstone rounding device 18, and the conical whetstone 18d is rotated and revolved to obtain the bristles 14
Polish a1 into a conical shape. Then, the plate-shaped grindstone rounding device 20 is further applied with the plate-shaped grindstone 20b to rotate the toothbrush 14 so that the bristle tips of the toothbrush 14 have a hemispherical shape.

Although only the rounding process results in the state shown in FIG. 9B, the grindstones 18d and 20a are formed only on the peak 14t.
Since it does not hit, the rounding processing cannot be performed up to the tips of the valleys 14e.

Therefore, in the device of this embodiment, in the valley grindstone rounding device 22, as shown in FIGS. 9 (c) and 9 (d), the tips of the bristles 14a of the toothbrush 14 (tips 14a1).
The peripheral edge portion 40c of the grindstone 40 that has been rotated is pressed to cause the grindstone 40 to reciprocate along the valley portion at a right angle to the longitudinal direction of the toothbrush 14. Thereby, the whetstone 4 having a tapered edge portion
The peripheral edge portion 40c of the
Can be slidably contacted with the bristle tips of the valley portions 14e of the brush to round the bristle tips. Therefore, the valley portions 14 of the brush 14 which cannot be reached by the conical grindstone 18d and the rotary flat plate grindstone 20a.
It is possible to surely round e.

Since the grindstone for rounding the valley portion is the rotary grindstone 40, it was simply rotated by the servomotor, but it may be linearly reciprocated. Thus, the effect of the present invention can be obtained. Further, a toothbrush is suitable for the application of the present invention, but the effect of the present invention can be obtained by implementing the present invention on all other brushes for rounding the bristles.

[0027]

As described above, according to the present invention, it is possible to surely perform the rounding process even on the lower portion of the brush which is cut and aligned with the height difference of the bristle tips. The bristles can be improved by rounding all the tips. Further, since heat rays and a laser beam are not used, it is possible to arrange the tips of the hairs in a good manner and look good, and it is possible to prevent an increase in cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a bristle tip rounding device for a toothbrush according to an embodiment of the present invention, and is a front view configuration diagram of a bristle tip processing line.

FIG. 2 is a side view of the hair rounding device according to the present invention.

FIG. 3 is a front sectional view of the same.

FIG. 4 is a front sectional view of a disc grindstone rounding device.

FIG. 5 is a front sectional view of a conical whetstone rounding device.

FIG. 6 is a side view configuration diagram of the line.

7A and 7B are an axial view and a half cross-sectional view perpendicular to the axis of a grindstone (polishing body).

8 (a) and 8 (b) are an axial view and a half-sectional view perpendicular to the axis of a grindstone of another embodiment.

9 (a) to 9 (d) are explanatory views of rounding of the bristles of a brush, respectively, (a) before rounding, (b) roundness of mountain peaks, and (c) valleys. Rounding processing state diagram,
(D) is the same side view.

10A and 10B are explanatory views of a general toothbrush, in which FIG. 10A is a flat cut, and FIG.

11A and 11B are explanatory diagrams of a conventional rounding process, in which FIG. 11A is an explanatory diagram of before processing and FIG. 11B is an explanatory diagram of a processing state.

[Explanation of symbols]

 14 Toothbrush 14 Bristles (for bristle) 14t Bristles of hair 14e Valley of bristles 22 Valley grindstone rounding device 40 Grindstone 40c Grindstone periphery

Claims (3)

[Claims] 1. A device for rounding the bristle tips of a brush in which bristle tips of a bunch of bristles are cut and aligned at different heights, the polishing body having a tapered edge portion, and the polishing body. In a state in which the edge of the brush is moved, the edge of the brush is slidably contacted with the bristle tip of the lower portion of the brush, and a polishing body driving unit for rounding the bristle tip of the lower portion is provided. Brush tip rounding device. 2. The polishing body is a rotating body which is rotationally driven by a polishing body drive section with an edge portion as a peripheral edge portion, and the polishing body has large and small portions in a peripheral diameter. Brush tip rounding device. 3. The bristle rounding device according to claim 2, wherein the polishing body has a peripheral edge portion which is corrugated in such a manner that the peripheral edge portion is alternately concave and convex in the axial direction.