JPH119342A - Bristle tip grinding method and device for brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a fiber material into a gradually sharpened tapered shape in an early stage by providing an interval between grinding rotary bodies and gradually increasing a contact amount with a wire brush from the fiber material tip of a brush. SOLUTION: A toothbrush 6 is ground by the interaction of the rotation and swing of the wire brushes 50 by the swinging grinding rotary bodies 1 and 2. The toothbrush 6 repeats contact and non-contact with the intermittently provided wire brushes 50 while being successively moved in the longitudinal direction of the grinding rotary body 1 and the tip side of the fiber material 34 is gradually ground. A first grinding means 3 - a third grinding means 5 are arranged at prescribed positions along the moving direction of the toothbrush 6 in an order so as to gradually increase the contact amount with the wire brushes 50 from the fiber material tip of the toothbrush 6. Since the toothbrush 6 to be ground is ground while being successively moved on the wire brushes 50 in the respective grinding means 3-5 of different contact heights with the fiber material 34, the fiber material 34 is gradually ground from the tip and turned to the tapered shape with the sharp tip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for grinding the tip of a brush in which a plurality of fibrous materials implanted on a brush stand are tapered from the root to the tip.

[0002]

2. Description of the Related Art For example, there is a method of forming a fiber material planted on a brush base of a brush such as a toothbrush into a tapered shape which is gradually sharpened toward a tip end thereof. Japanese Patent Publication No. 50-40194 and Japanese Patent Publication No. 7-213346, etc., and a method of treating chemicals, and a physical treatment method disclosed in Japanese Patent Publication No. 50-24546 and Japanese Patent Laid-Open Publication No. 3-198808. Grinding method has been proposed.

However, in the chemical treatment method, the waste liquid must be treated for post-treatment of the solution saturated with the eluted fiber material and neutralization and washing of the fiber material, which increases the running cost. Was to be pushed up.

On the other hand, in the method of physically grinding, a cylindrical or disk-shaped grinder (grinding body) is used. Therefore, if it is attempted to grind to the root of the fiber material, the grinding body is strongly pressed against the fiber material. As a result, the root is ground more than the tip, which makes it difficult to control the tapered shape.

[0005] Further, in the process of thinning the fibrous material, the fiber material becomes slightly thinner near the root than at the tip thereof, and is eventually torn off from the thinned portion. For this reason, in the above-mentioned grinding body, the front end portion of the fiber material cannot be torn off because of a relatively smooth surface, and it is difficult to form a tapered shape with a sharp front end.

Further, there has been proposed a method in which a fiber material of a brush is brought into contact with a rotating cylindrical wire brush, and the fiber material is ground while moving the brush in the longitudinal direction of the wire brush. .

However, in the above method, as shown in FIG. 14, the brush 102 pressed against the rotating wire brush 101 causes the fiber material 103 to escape from the wire brush 101. For this reason, the fiber material 10
Since the brush 102 is moved in the longitudinal direction of the wire brush 101 (the direction perpendicular to the plane of the paper in the drawing) in a state in which the fiber material 3 is deformed, it is inevitable that only the tip of the fiber material 103 can be cut off.

Further, as shown in FIG. 15, when the outer peripheral surface 101a of the wire brush 101 is formed in a continuous wave shape along the longitudinal direction, when the fiber material 103 comes to the peak of the waveform, a valley having no resistance is obtained. It escapes to the part, and again it is impossible to grind the fiber material 103 to its root.

[0009] As shown in FIG.
In contrast, a method of swinging the wire brush 101 in the horizontal direction has been proposed. However, in this method, the fibrous material 103 is also greatly deformed with respect to the wire brush 101, and the deformed fibrous material 103 once escapes from the wire brush 101 and returns. , The fiber material 103 is deformed again. For this reason, the above method cannot effectively grind the fiber material 103 to the root.

Further, as shown in FIG. 17A, in the case of the brush 102 having a large flocking area, the curvature of the wire brush 101 is affected when the wire brush 101 does not swing. Therefore, the ground fiber material 103
Is dented in a mortar shape as shown in FIG.

Accordingly, an object of the present invention is to provide a brush bristle capable of forming a plurality of fibrous materials planted on a brush base in a tapered shape that is gradually sharpened from the root to the tip with high precision and at an early stage. An object of the present invention is to provide a pre-grinding method and apparatus.

[0012]

According to the first aspect of the present invention,
A set of grinding means in which a pair of grinding rotators having different rotation directions are arranged in a row in the longitudinal direction are arranged at predetermined intervals, and a brush formed by implanting a plurality of fiber materials on a brush base is rotated. A brush tip grinding method for grinding the fibrous material so as to have a tapered shape gradually as it goes to the distal end side while sequentially moving in the longitudinal direction of the grinding rotating body, wherein the grinding rotating body has a cylindrical portion. Formed by providing a plurality of wire brushes on the peripheral surface at predetermined intervals along the longitudinal direction, and contacting the plurality of grinding means with the wire brush from the fiber material tip of the brush. The above object has been attained by providing a brush tip grinding method characterized in that the brush tip is gradually increased.

According to a second aspect of the present invention, in the brush tip grinding method of the first aspect, the brush is rotated in a plane on the wire brush. The above object has been achieved by providing a grinding method.

According to a third aspect of the present invention, in the brush tip grinding method according to the first or second aspect, the pair of grinding rotary members are swung in a direction substantially perpendicular to the moving direction of the brush. The above object has been achieved by providing a bristle tip grinding method characterized by the above.

According to a fourth aspect of the present invention, in the brush tip grinding method according to the first, second or third aspect, a substantially spherical projection is provided at a tip of the fiber material of the brush before grinding. The above object has been attained by providing a brush tip grinding method.

The invention according to claim 5 is the invention according to claims 1, 2, and 3
Alternatively, in the brush tip grinding method according to 4, the above object is achieved by providing a brush tip grinding method, wherein the brush is a toothbrush.

The invention according to claim 6 is the invention according to claims 1, 2, 3
Alternatively, in the brush tip grinding method according to 4, the above object is achieved by providing a brush tip grinding method, wherein the brush is a hair brush.

According to a seventh aspect of the present invention, a plurality of grinding means, in which a pair of grinding rotating bodies having different rotation directions are arranged in a row in the longitudinal direction, are arranged at predetermined intervals, and a plurality of fiber materials are brushed. A brush tip grinding device that grinds the fiber material so that it gradually becomes tapered as it goes to the front end side while sequentially moving the brush formed on the table in the longitudinal direction of the rotating grinding rotating body. The grinding rotary body is formed by providing a plurality of wire brushes on a peripheral surface of a cylindrical portion at predetermined intervals along a longitudinal direction, and a plurality of the grinding means are provided by a fiber material of the brush. The object has been achieved by providing a brush tip grinding device characterized in that the contact amount with the wire brush from the tip is gradually increased.

According to an eighth aspect of the present invention, there is provided the brush tip grinding device according to the seventh aspect, further comprising a mechanism for rotating the brush in a plane on the wire brush. The above object has been achieved by providing a bristle tip grinding device.

According to a ninth aspect of the present invention, in the brush tip grinding device according to the seventh or eighth aspect, the pair of grinding rotary members are swung in a direction substantially perpendicular to the moving direction of the brush. The above object has been achieved by providing a brush bristle tip grinding device characterized by the above.

According to a tenth aspect of the present invention, in the brush bristle tip grinding apparatus according to the seventh, eighth or ninth aspect, a substantially spherical projection is provided at a tip of a fiber material of the brush before grinding. The above object has been achieved by providing a brush tip grinding device described above.

The eleventh aspect of the present invention is the seventh aspect of the present invention.
In the brush tip grinding device according to 9 or 10, the above object is achieved by providing a brush tip grinding device, wherein the brush is a toothbrush.

According to a twelfth aspect of the present invention,
In the brush tip grinding device according to 9 or 10, the above object is achieved by providing a brush tip grinding device, wherein the brush is a hair brush.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment to which the present invention is applied will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a schematic configuration of a brush tip grinder, FIG. 2 is an enlarged perspective view showing a grinding rotary body,
3 is an enlarged view of the grinding rotary body, (a) is a front view, (b) is a side view, FIG. 4 is a perspective view showing a brush moving means, and FIG. 5 is a mechanical clutch in a bristle tip grinding device. FIG. 6 is a cross-sectional view of the mechanism, FIG. 6 is an enlarged perspective view of a main part showing a mechanical clutch mechanism partially cut away, and FIG. 7 is a plan view showing a state in which a rotation preventing roller contacts a rotation preventing cam to stop a rotating body. 8 is a side view showing the toothbrush, FIG. 9 is a schematic diagram showing a state in which the toothbrush is ground in a stepwise manner, FIG. 10 is an enlarged schematic diagram of a main part showing a state in which the tip of the toothbrush is ground, and FIG. It is a principal part enlarged schematic diagram which shows a mode that the front-end | tip of the toothbrush provided with the spherical-shaped protrusion is grinded.

First, the brush tip grinding device of the present embodiment will be described. As shown in FIGS. 1 to 4, the brush bristle tip grinding device of this embodiment is a grinding device that forms a plurality of fibrous materials planted on a brush stand into a tapered shape that is gradually sharpened from the root to the tip. It is.

The above-mentioned bristle tip grinding device comprises a pair of grinding means in which a pair of grinding rotating bodies 1 and 2 having different rotation directions are cascaded in the longitudinal direction, that is, a first grinding means 3 and a second grinding means 4. And a third grinding means 5 and a brush moving means 7 for sequentially moving the toothbrush 6 as a brush in the longitudinal direction of the rotating grinding rotators 1 and 2.

As shown in FIG. 2, each of the first to third grinding means 3 to 5 is composed of a pair of grinding rotating bodies 1 and 2 having a pair of cylindrical shapes. The bodies 1 and 2 are arranged in tandem in the longitudinal direction.
The pair of grinding rotating bodies 1 and 2 are rotatably mounted on the respective brush mounting bases 8 and are rotated by brush rotating motors 9 in different directions as indicated by arrows A and B in FIG. It has been done.

That is, the pair of grinding rotary bodies 1 and 2
As shown in FIG. 2, the brush rotation motor 9 has rotation transmission gears 12 and 13 provided at the tip of a drive shaft 10 of the brush rotation motor 9 and meshes with a bevel gear 11 to rotate the brush rotation motor 9. By transmitting the rotation to the grinding rotators 1 and 2 by the rotation transmitting gears 12 and 13, they rotate in different directions. Accordingly, one of the grinding rotators 1 rotates in the direction indicated by the arrow A in FIG. 2, and the other grinding rotator 2 rotates in the opposite direction indicated by the arrow B in FIG. I have.

As shown in FIGS. 2 and 3, each of the grinding rotary members 1 and 2 has a cylindrical portion 49 made of, for example, aluminum or cast iron. The wire brushes 50 are formed by providing the wire brushes 50 at predetermined intervals along the longitudinal direction. That is, the plurality of wire brushes 50 are intermittently provided in the cylindrical portion 49 along the longitudinal direction. For this reason, the toothbrush 6 sequentially moving in the longitudinal direction of the grinding rotators 1 and 2 intermittently repeats contact or non-contact with the wire brush 50 intermittently.

The distance P between adjacent wire brushes 50
It is sufficient if there is enough distance to allow time for the bristle tip of the toothbrush 6 to recover elastically.

Each of the wire brushes 50 is a wire brush made of stainless steel (SUS). The diameter of the wire used for the wire brush 50 is preferably, for example, 0.1 to 0.5 mm.
If it is less than 0.1 mm, the rigidity of the wire is reduced,
Since the wire escapes when the toothbrush 6 is pressed,
The grinding ability is significantly reduced. Further, since the amount of deformation of the wire increases, the rate of breakage of the wire due to repeated strain increases. If it exceeds 0.5 mm, it becomes difficult for the wire to enter the inside of the brush, and the root of the toothbrush 6 cannot be ground. In addition, the roughness of the ground surface is severe, and the finish grinding must be performed for a long time.

Then, as shown by the arrow C in FIG. 1, the grinding rotary bodies 1 and 2 move in a direction substantially perpendicular to the moving direction of the brush 6 which moves in a loop (indicated by the arrow D in FIG. 1). (The direction shown). As shown in FIG. 2, the swinging of the grinding rotators 1 and 2 is performed by using a pin 16 that engages with a long hole 15 formed in a swinging piece 14 attached to the lower surface of the brush attachment base 8. The rotation is performed by a rotation motor 19 provided eccentrically on a block 18 attached to the tip of the rotation shaft 17. That is, when the rocking motor 19 is rotated, the rotating shaft 1
7 are eccentrically provided with respect to the long hole 15.
To move the pair of grinding rotators 1 and 2 up and down.

As shown in FIG. 9, the first to third grinding means 3 to 5 constructed as described above are used to connect the wire brush 50 from the tip of the fiber material of the toothbrush 6.
The toothbrush 6 is arranged at a predetermined position along the moving direction of the toothbrush 6 as shown in FIG. 1 so that the amount of contact with the toothbrush gradually increases.

[0035] That is, the wire brush 50 in the first grinding means 3, the position shown in FIG. 9 the solid line H _1, wire brush 50 in the second grinding means 4, the position indicated by a chain line H ₂ one-dot in FIG. third wire brush 50 in the grinding means 5, as a position shown by chain line H ₃ double dot in the figure, the first grinding means 3 from the second grinding means 4 and the third grinding means, respectively 5 The height of the wire brush 50 is increased stepwise or steplessly.

As shown in FIG. 1, the first to third grinding means 3 to 5
Are arranged as follows along the movement direction C. That is, the first grinding unit 3 is disposed in front of a position where the toothbrush 6 in a state before grinding is supplied, and the second grinding unit 4 is spaced a predetermined distance in front of the first grinding unit 3. The third grinding means 5 is arranged at a distance from the second grinding means 4 and is opposed to the second grinding means 4.

In front of the third grinding means 5,
A fourth grinding means 22 having a pair of cylindrical nylon brushes 20, 21 having different rotation directions from each other is arranged. The fourth grinding means 22 is provided to provide a smooth grinding surface because the grinding surface is roughened only by grinding with the wire brush 50. The nylon brushes 20 and 21 have their surfaces kneaded with abrasive grains. As the roughness of the abrasive grains, for example,
It is preferable to use # 2000.

If the roughness of the abrasive grains is less than # 500, the grinding surface is almost the same as immediately after the wire brush grinding treatment, and if it exceeds # 2000, the nylon brush grinding time is much longer than the wire brush grinding time. Either the device must be made larger (to lengthen the nylon brushes or place more nylon brushes) or the processing speed of the device must be reduced (to reduce the speed of movement of the brush passing over the nylon brushes).

The fourth grinding means 22 has the same configuration as the first to third grinding means 3 except that the grinding rotary members are nylon brushes 20 and 21. Therefore, the description of the common parts is omitted.

As shown in FIGS. 4 and 5, the brush moving means 7 includes a rail 23 laid at a portion where the brush 6 moves in a loop, and a chain drive (not shown) along the rail 23. And a moving member 24 to be moved.

The moving member 24 is, as shown in FIG.
A pair of slide plates 2 sandwiching the rail 23 from above and below
5 and 26, a rotating body 27 provided between the slide plates 25 and 26, a toothbrush holding section 28 which rotates with the rotating body 27 and is provided at an end thereof, a rack 29 and a pinion 30 for rotating the rotating body 27. And

The pair of slide plates 25 and 26 are shown in FIG.
As shown in FIG. 5, the rail 23 has a substantially rectangular planar shape and slides along the upper and lower surfaces of the rail 23 having a substantially H-shaped cross section.
The slide plates 25 and 26 are connected by a plurality of columns 31 having a columnar shape.

As shown in FIG. 4, the rotating body 27 has a cylindrical shape having a rotating shaft 32 at the center, and is rotatably provided between the pair of slide plates 25 and 26.

FIGS. 4 and 5 show the toothbrush holder 28.
As shown in the figure, the toothbrush 6 is held at the tip, and is provided at the tip of the rotating shaft 32 of the rotating body 27, which projects through the slide plate 26 provided below. The toothbrush holder 28 holds and holds the toothbrush 6 before polishing, and releases the toothbrush 6 after a series of grinding is completed. The portion for holding the toothbrush 6 is a brush base 3 on which a fiber material 34 shown in FIG. 8 is planted in order to reliably grind the bristle tips.
5

The rack 29 is provided above and along the rail 23, as shown in FIGS. On the other hand, the pinion 30 protrudes through the slide plate 25 provided above,
7 is provided on the tip side of the rotation shaft 32. The pinion 30 is configured to rotate while meshing with the rack 29. A coil spring 33 is provided above the pinion 30 and at the tip of the rotating shaft 32.

The coil spring 33 is used as a holding force when a mechanical clutch (described later) provided in the rotating body 27 is connected. The mechanical clutch is for preventing the rotation from the pinion 30 from being transmitted to the toothbrush holding unit 28 near the toothbrush input / output unit so that the toothbrush can be easily input and output.

In the mechanical clutch, as shown in FIG. 5, the pinion 30 and the rotary shaft 32 are fastened, and the opposite side (base end side) of the rotary shaft 32 from the pinion 30 fastening is gear-shaped. A part 39 is provided. And
The cam 40 has an internal gear-shaped processing portion 41, which meshes with the gear-shaped processing portion 39 of the rotating shaft 32. The cam 40 is fixed to a slide shaft 42 which can rotate and slide in the axial direction within the rotation shaft 32.

As shown in FIG. 5, a spherical bearing 44 supporting a ball 43 is fixed to the other end of the slide shaft 42 to which the cam 40 is fixed. As shown in FIG. 6, a pair of clutch connecting rollers 45 are disposed inside the rotating body 27. These clutch connecting rollers 45 are such that the slide shaft 42 is a coil spring 3
3, the cam 40
And is engaged with the groove 46 formed in the groove.

The rotation is transmitted from the pinion 30 to the rotating shaft 32, and from the rotating shaft 32 to the cam 40 through the gear-shaped processing portion 39, and further from the cam 40 to the clutch connecting roller 45.
, That is, to the rotating body 27. Disengagement of the clutch is performed by the ball 43 being pushed down from above. Then, the cam 40 fixed to the slide shaft 42 is pushed down, and a groove 46 formed in the cam 40 is formed.
And the clutch connecting roller 45 are separated, so that the rotating body 27 can freely rotate with respect to the rotating shaft 32. At this time,
As shown in FIG. 7, an anti-rotation roller 47 fixed to the outer periphery of the rotator 27 comes into contact with the anti-rotation cam 48 to stop the rotation of the rotator 27.

The moving member 24 constructed as described above
According to this, the pair of slide plates 25 and 26 are moved in the direction indicated by the arrow E in FIG. 4 along the rail 23 by the chain drive, and the pinion 30 meshing with the rack 29 rotates with the movement. Then, the toothbrush holding section 28 rotates together with the rotating body 27, and the toothbrush 6 held by the toothbrush holding section 28 rotates planarly in the direction indicated by the arrow F in FIG. The reason why the toothbrush 6 is rotated in a plane on the wire brush 50 is to bring the fiber material 34 into contact with the wire brush 50 from any direction in the circumferential direction of the fiber material 34.

Next, the brush tip grinding method of the present embodiment will be described. In the brush tip grinding method of the present embodiment, a pair of grinding means 3, 4, 5 in which a pair of grinding rotating bodies 1, 2 having different rotation directions are arranged in a longitudinal direction are arranged at predetermined intervals. And a brush formed by implanting a plurality of fiber materials on a brush base is rotated by the rotating rotating body 1,
2. While the fiber material is sequentially moved in the longitudinal direction, the fiber material is ground so as to have a tapered shape that gradually becomes sharper toward the distal end side. Formed by providing a plurality of wire brushes 50 at predetermined intervals along the longitudinal direction, and
The plurality of grinding means 3, 4, and 5 are arranged such that the amount of contact between the brush and the wire brush 50 from the fiber tip of the brush gradually increases.

Hereinafter, the brush tip grinding method of the present embodiment will be described in more detail. First, as shown in FIG. 1, the toothbrush 6 before polishing is supplied to the apparatus having the above configuration. As shown in FIG. 8, the toothbrush 6 supplied here has a flocked portion 35 which is a brush base on which a plurality of fiber materials 34 are planted, a grip portion 36 functioning as a handle, and the flocked portion 35 and the grip portion. And a neck 37 connecting the parts 36. The fibrous material 34 is made of, for example, a synthetic fiber or a chemical fiber, and in a state before the polishing, as shown in FIG.

When the toothbrush 6 is supplied to the apparatus of the present embodiment, the toothbrush 6 is attached to the toothbrush holding portion 28 of the moving member 24 moved along the rail 23.
Is held. The moving member 24 holding the toothbrush 6 is sequentially and continuously moved along the rail 23 in the direction of arrow C in FIG. When the moving member 24 is moved, the rotating body 27 is rotated by the pinion 30 meshing with the rack 29, and the toothbrush holder 28 provided at the tip of the rotating body 27 is rotated.
Is rotated. That is, the toothbrush 6 rotates in the plane while the first grinding means 3
It is sequentially and continuously sent to the second grinding means 4, the third grinding means 5, and the fourth grinding means 22.

First, as shown in FIG. 1, the toothbrush 6 is sent to a position where the first grinding means 3 is provided.
In the portion where the first grinding means 3 is provided, the wire brush 50 of the grinding rotators ₁ and 2 is set at the position indicated by the solid line H1 in FIG. Therefore, the front end side of the fiber material 34 is ground. In addition, the toothbrush 6 is rotated by the grinding rotators 1 and 2 in a direction substantially perpendicular to the moving direction C of the toothbrush 6 indicated by an arrow D in FIG. Grinded by interaction.

During the contact with the wire brush 50, cooling water is injected to suppress the deformation of the fiber material 34 and to wash away the grinding powder. The cooling water is circulated after collecting the grinding powder through a filter such as a nonwoven fabric or paper.

First, the toothbrush 6 comes into contact with a wire brush 50 provided in the foreground of the grinding rotator 1,
It is ground by the rotating wire brush 50. In particular, when the fiber material 34 of the toothbrush 6 rides on the wire brush 50, the fiber material 34 is ground to a position closer to the root than its tip.

Next, as shown in FIG. 3B, when the toothbrush 6 is moved to a position where the wire brush 50 is not provided, the fibrous material 34 pressed against the wire brush 50 becomes elastic. Recover. That is, the fiber material 3 deformed by being pressed against the wire brush 50
4 returns to the state before deformation (straight state). The elastically restored toothbrush 6 comes into contact with the wire brush 50 provided next, and the fiber material 34 is ground by the rotating wire brush 50.

As described above, the toothbrush 6 repeats contact and non-contact with the intermittently provided wire brush 50 while sequentially moving in the longitudinal direction of the grinding rotator 1.
The tip side of the fiber material 34 is gradually ground.

Here, for example, as shown in FIG.
When the contact is made, the fibrous material 34 is greatly deformed and only its tip is ground, and the grinding amount is small for the grinding time. On the other hand, as in this embodiment, the fibrous material 34 is intermittently repeatedly brought into contact with and not in contact with the wire brush 50 so that the fibrous material 34 is
If the number of times of climbing to zero is increased and the deformation of the fibrous material 34 is recovered before being brought into contact with the wire brush 50, even the portion closer to the root than the tip of the fibrous material 34 is ground.

Then, the toothbrush 6 is similarly ground by the next grinding rotator 2 which rotates in the reverse direction to the grinding rotator 1 provided on the front side.

When the grinding by the first grinding means 3 is completed, the toothbrush 6 is ground by the second grinding means 4 arranged next, as shown in FIG. In the second grinding means 4, the toothbrush 6, as shown in FIG. 9, the contact with the wire brush 50 set in the position indicated by a chain line H ₂ one-dot in FIG. That is,
The fiber material 34 comes into contact with the wire brush 50 up to a portion slightly closer to the root than the tip of the fiber material 34 of the toothbrush 6. Then, the second grinding means 4 is also ground in the same manner as the first grinding means 3.

Next, when the grinding by the second grinding means 4 is completed, the toothbrush 6 is moved, as shown in FIG.
Next, it is ground in the third grinding means 5 arranged. In the third grinding means 5, the toothbrush 6
As shown in FIG. 9, the contact with the wire brush 50 set to the position indicated by the chain line H ₃ two-dot in FIG.
That is, the fiber material 34 comes into contact with the wire brush 50 from the tip of the fiber material 34 of the toothbrush 6 to the portion near the base. The third grinding means 4 is also ground in the same manner as the first grinding means 3.

When the grinding by the third grinding means 5 is completed, the toothbrush 6 is ground by the fourth grinding means 22 disposed next, as shown in FIG. In the fourth grinding means 22, the toothbrush 6, the same position as set position of the wire brush 50 in the third grinding means 5, i.e., is set to the position shown in Figure 5 in two-dot chain line H ₃ Nylon brush 2
Contact 0,21. Then, similarly, the toothbrush 6 is ground by the nylon brushes 20 and 21.

The toothbrush 6, which has been ground through the four grinding steps, is released from being held by the toothbrush holding section 28 and is sent to a discharge port (not shown).

The toothbrush 6 to be ground through the above steps
As shown in FIG. 9, since the grinding is performed while sequentially moving on the wire brush 50 in each of the grinding means 3 to 5 having different contact heights with the fiber material 34, the fiber material 34 is
As shown in FIG. 10, is gradually ground from the tip, and finally the tip is skipped as shown in FIG. 10 (e), and gradually becomes a tapered shape toward the tip. Thereafter, in the fourth grinding means 22, the fiber material 34 is ground by the nylon brushes 20, 21, so that the rough surface generated by the grinding by the wire brushes 1, 2 becomes smooth.

As described above, the fiber material 34 of the toothbrush 6 is used.
Is ground stepwise or steplessly from the tip end to the root side while changing the contact height with the wire brush 50 to obtain the fibrous material 3.
4 can be easily controlled to have a tapered shape, and a desired tapered shape can be obtained. Further, according to the grinding method of the present embodiment, since it is a method of physically grinding, there is no problem of waste liquid treatment when grinding by chemical treatment, and reduction in running cost can be realized.

The specific embodiments to which the present invention is applied have been described above. However, the present invention is not limited to the above-described embodiments and can be variously modified without departing from the gist of the present invention. For example, in the above-described embodiment, the toothbrush 6 is rotated in a plane on the wire brush 50, and the grinding rotators 1 and 2 are swung in a direction substantially orthogonal to the moving direction of the toothbrush 6, Even without performing any of these actions, the fiber material 34 of the toothbrush 6 can be ground from the tip side to the root side.

That is, if the fiber material 34 of the toothbrush 6 is repeatedly and alternately contacted and non-contacted with the intermittently arranged wire brush 50, the object of the present invention is achieved by itself. In addition, if the toothbrush 6 is rotated in a plane on the wire brush 50, the fiber material 3
No. 4, the wire brush 50 comes into contact from any direction in the circumferential direction, and can be uniformly ground. Furthermore, if the grinding rotators 1 and 2 are rocked, the fiber material 34 can be further ground from the tip to the root.
In a brush having a small flocking area, it is not necessary to swing the grinding rotators 1 and 2 in a direction substantially orthogonal to the moving direction of the brush.

Further, in the present invention, as shown in FIG. 11, a substantially spherical projection 38 may be provided at the tip of the fiber material 34. If such projections 38 are provided, the fiber material 3
When the tip of 4 has a tapered shape, the projection 38 at the tip is easily caught, so that it can be easily torn off, and a uniform tapered shape with a sharp tip can be formed at an early stage. As a result, the grinding time of the toothbrush 6 can be significantly reduced.

It is preferable that the projection 38 has a substantially spherical shape with a diameter larger than the diameter of the fiber material 34 as shown in FIG. The reason that the protrusion 38 is formed into a substantially spherical shape having a diameter larger than the diameter of the fiber material 34 is to shorten the grinding time. If the grinding time can be shortened, the passage time on the wire brush 50 is shortened and the unit time is reduced. It is possible to increase the number of treatments per unit, or to reduce the length of the wire brush 50 to reduce the size of the apparatus itself.

In the above-described embodiment, the toothbrush 6 is used as a brush. However, the present invention is not limited to the toothbrush 6 as long as the fiber material has a tapered shape that is gradually sharpened toward the tip. , Shoe brush,
It can also be used for nail brushes, paint brushes, etc.

In the above-described embodiment, the moving means 24 is moved by a chain drive. However, the moving means 24 may be moved by a drive means such as a timing belt drive, a metal belt drive, and a linear motor.

In the above-described embodiment, a plurality of wire brushes 50 are provided at predetermined intervals along the longitudinal direction on the peripheral surface of the cylindrical portion 49 as the grinding rotators 1 and 2. As shown in FIG. 12, a grinding means in which a single wire brush 50 is rotated by a motor 51 via a belt 52 as shown in FIG.
A plurality may be arranged at predetermined intervals. At this time, it is desirable that the arrangement pitch of the wire brushes 50 is not set to a distance that the brush moves by an integer number of rotations. The belt 52 is hung between a pulley 53 provided at the tip of the rotating shaft of the wire brush 50 and a pulley 54 provided at the tip of the rotating shaft of the motor 51.

In FIG. 13, each wire brush 5
0 indicates that every other rotation direction is forward / reverse, but the rotation direction is not necessarily alternated. For example, it may be a forward direction, a forward direction, a reverse direction, or a reverse direction. In such cases,
It is preferable to arrange the wire brushes 50 with the numbers in the forward direction and the reverse direction being substantially equal.

[0075]

As is clear from the above description, according to the present invention, a plurality of fiber materials planted on a brush stand are
It is possible to provide a method and an apparatus for brush tip grinding of a brush, which can be formed in a tapered shape that is gradually sharpened from the root to the tip with high accuracy and at an early stage.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a brush tip grinding device of the present embodiment.

FIG. 2 is an enlarged perspective view showing a grinding rotary body in the brush tip grinding device of the present embodiment.

FIGS. 3A and 3B are enlarged views of a part of the grinding rotator shown in FIG. 2, wherein FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is a perspective view showing a brush moving means in the brush tip grinding device of the present embodiment.

FIG. 5 is a sectional view of a mechanical clutch mechanism in the brush tip grinding device of the present embodiment.

FIG. 6 is an enlarged perspective view of a main part showing a mechanical clutch mechanism partially cut away.

FIG. 7 is a plan view showing a state in which a rotation preventing roller comes into contact with a rotation preventing cam to stop the rotating body.

FIG. 8 is a side view showing a toothbrush to be ground in the brush tip grinding device of the present embodiment.

FIG. 9 is a schematic diagram showing a state in which the toothbrush is ground by changing the contact amount of the toothbrush with the wire brush in a stepwise manner, and a positional relationship between the fiber material of the toothbrush and the wire brush.

FIG. 10 is an enlarged schematic view of a main part showing a state in which the tip of the toothbrush is ground in the brush tip grinding device of the present embodiment.

FIG. 11 is an enlarged schematic view of a main part showing a state in which the tip of a toothbrush having a substantially spherical projection at the tip is ground in the brush tip grinding device of the present embodiment.

FIGS. 12A and 12B show grinding means for driving a single grinding rotating body by a belt, wherein FIG. 12A is a front view and FIG. 12B is a side view.

13 is a diagram showing an example in which a plurality of grinding means shown in FIG. 12 are arranged at predetermined intervals.

FIG. 14 is a schematic view showing a state in which a fiber material of a toothbrush escapes and is deformed in a conventional bristle tip grinding device.

FIG. 15 is a schematic view showing a state in which the fiber material of the toothbrush escapes at the peak of the corrugated wire brush in the conventional bristle tip grinding device.

FIG. 16 is a schematic diagram showing a state in which the fiber material of the toothbrush also escapes when the wire brush is swung in the horizontal direction with respect to the brush in the conventional bristle tip grinding device.

FIG. 17 is a schematic view showing a state in which a brush having a large flocked area is ground without swinging the wire brush in the conventional bristle tip grinding device.

[Explanation of symbols]

 1, 2 grinding rotating body 3 first grinding means 4 second grinding means 5 third grinding means 6 toothbrush 7 brush moving means 20, 21 nylon brush 22 fourth grinding means 34 fiber material 38 spherical projection 49 Cylindrical part 50 Wire brush

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroki Odawara 2-1-18 Ohama, Sakata City, Yamagata Prefecture Inside the Sao Plant of Kao Corporation

Claims (12)

[Claims] 1. A set of grinding means in which a pair of grinding rotating bodies having different rotation directions are arranged in a row in the longitudinal direction are arranged at predetermined intervals, and a plurality of fiber materials are planted on a brush base. A brush tip grinding method for grinding a brush so as to gradually form a tapered shape toward a tip end while moving a brush sequentially in a longitudinal direction of the rotating grinding rotator, wherein the grinding rotation is performed. The body is formed by providing a plurality of wire brushes on the peripheral surface of the cylindrical portion at predetermined intervals along the longitudinal direction, and the plurality of grinding means are provided by the wire brush from a fiber material tip of the brush. A brush tip grinding method, wherein the brush tip is arranged so that the amount of contact with the brush gradually increases. 2. The method according to claim 1, wherein the brush is rotated on the wire brush in a planar manner. 3. The brush tip grinding method according to claim 1, wherein the pair of grinding rotary members are swung in a direction substantially perpendicular to a moving direction of the brush. 4. A brush tip grinding method according to claim 1, wherein a substantially spherical projection is provided at a tip of the fiber material of the brush before grinding. 5. The method according to claim 1, wherein the brush is a toothbrush. 6. The method according to claim 1, wherein the brush is a hairbrush. 7. A plurality of sets of grinding means in which a pair of grinding rotating bodies having different rotation directions are arranged in a row in the longitudinal direction are arranged at predetermined intervals, and a plurality of fiber materials are planted on a brush base. A brush bristle tip grinding apparatus for grinding a brush so as to gradually form a tapered shape toward a tip end while sequentially moving a brush in a longitudinal direction of the rotating rotating body, wherein the grinding rotation is performed. The body is formed by providing a plurality of wire brushes on the peripheral surface of the cylindrical portion at predetermined intervals along the longitudinal direction, and the plurality of grinding means are provided by the wire brush from a fiber material tip of the brush. A brush tip grinding device, wherein the brush tip is arranged so that the amount of contact with the brush tip gradually increases. 8. The brush tip grinding device according to claim 7, further comprising a mechanism for rotating the brush in a plane on the wire brush. 9. A brush tip grinding device according to claim 7, wherein said pair of said grinding rotary members are swung in a direction substantially perpendicular to a moving direction of said brush. 10. The fiber material tip of the brush before grinding,
9. A substantially spherical projection is provided.
Or a brush tip grinding device according to claim 9. 11. The brush tip grinding device according to claim 7, wherein the brush is a toothbrush. 12. The brush tip grinding device according to claim 7, wherein the brush is a hairbrush.