JPH0695963B2 - Brush bristle tip processing method and device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and a device for processing a bristle tip of a brush, particularly a toothbrush.

[Conventional technology]

Generally, in the manufacturing process of toothbrushes, a large number of filaments are planted on the tip of a synthetic resin handle and cut to a certain length, and then the tip of the filament (hair bristles) Polishing is done to remove the corners.

FIG. 8 is a view schematically showing a conventional hair tip processing device 50, in which FIG. 8 (a) is a plan view and FIG. 8 (b) is a front view.

The bristle tip processing device 50 is configured such that the umbrella-shaped grindstone 51 that is driven to rotate (rotate) around the shaft 52 in the direction of arrow M8 rotates (revolves) around the shaft 53 in the direction of arrow M9. With respect to the bristle tip processing device 50, by holding the toothbrush TB from above the rotating grindstone 51 so that the bristle tip TF is pressed against the upper surface of the grindstone 51, the bristle tip TF is ground into a conical shape. It

The grindstones 51 include four grindstones 51 (not shown) arranged in order with a proper interval, from a coarse-grinding rough grinding to a fine-mesh finishing grinding. The toothbrush TB is a transfer device. By these, the four grindstones 51 are intermittently conveyed sequentially and held so as to be pressed against the upper surfaces of the respective grindstones 51 for a predetermined time.

The bristle tip TF of the toothbrush TB is polished in an oblique direction with respect to the axis of the bristle tip TF by the rotation of the grindstone 51, and is also conically polished over the entire circumference of the tip TF by the revolution of the grindstone 51.

[Problems to be Solved by the Invention]

However, the above-described hair tip processing device 50 has a complicated structure because the grindstone 51 revolves while revolving around its own axis, resulting in a high manufacturing cost of the hair tip processing device 50. Further, since the transport device for transporting the toothbrush TB has to move sequentially between the four grindstones 51 and hold the toothbrush TB above the grindstone 51 for a certain period of time, the structure and control of the transport device are complicated. Therefore, there is a problem that the manufacturing cost is still high. There is also a problem that the amount of processing per unit time is small because the polishing of the bristle tip TF cannot be performed continuously.

Further, there is a device in which a cylindrical grinder is rotated around a horizontal axis and the horizontal axis is rotated in a horizontal plane so that the tips of toothbrushes are pressed against the surface of the grinder. Is disclosed in. However, according to this conventional technique, a complicated drive mechanism using a bevel gear, a worm gear, etc. is required to rotate the grinder while rotating it, and the structure of the entire device becomes complicated, so that assembly and maintenance are troublesome. It was disadvantageous in terms of manufacturing cost.

In view of the above problems, an object of the present invention is to provide a processing method capable of easily polishing the bristle tips of a brush with a processing device having a simple structure.

An object of the invention of claim 2 is to provide a processing device having a simple structure for polishing the bristle tips of a brush and having a low manufacturing cost.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the processing method according to the invention of claim 1 arranges a plurality of disk-shaped polishing plates so that their rotation centers are located on opposite sides with respect to a linear locus, Among the polishing plates, at least two adjacent polishing plates are rotated so that the rotation directions thereof are the same, and the bristle tips of the brushes are pressed against the surface of the polishing plate. Move the brush along the trajectory.

In the processing apparatus according to the second aspect of the present invention, a plurality of disk-shaped polishing plates arranged such that their centers of rotation are located on opposite sides with respect to a linear locus, and at least adjacent to each other among the polishing plates. The rotation driving means for rotating the polishing plates so that the rotation directions of the pair of polishing plates are the same, and the brush with the bristle tips of the brush being pressed against the surface of the polishing plate. And a brush conveying means for moving along the path.

[Action]

 The operation of the present invention will be described with reference to FIGS. 6 and 7.

In FIG. 6, a disk-shaped polishing plate that rotates in the direction of arrow M4
When the bristle tip TF of the toothbrush TB is pressed against the DK and moved along the locus LC1, when the toothbrush TB is at the position A, the bristle tip TF is in the direction of the arrow M5 as shown in FIG. 7 (a). To be polished. Similarly, when the toothbrush TB is at the B position or the B position, the bristle tips TF are polished in the directions of arrows M6 and M7, respectively, as shown in FIGS. 7 (b) and 7 (c).

As a result, approximately half the circumference of the bristle tip TF is polished.

In addition, the polishing direction due to the rotation of the polishing plate DK with respect to the bristle tip TF is a different trajectory LC2 that is opposite to the above-described trajectory LC1.
When the toothbrush TB is moved in the same manner as described above, the remaining half circumference of the bristle tip TF is polished.

As a result, the entire circumference of the bristle tip TF is polished.

Arranging a plurality of disc-shaped polishing plates DK so that their rotation centers are located on opposite sides of a linear trajectory,
By rotating the polishing plates DK so that at least two adjacent polishing plates in the DK rotate in the same direction, the loci LC1 and LC2 become one straight line, and the toothbrush TB is The hair tip TF is polished by moving it along a linear trajectory.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of the processing apparatus 1 according to the present invention, and FIG. 2 is a front view of the processing apparatus 1.

The processing device 1 includes a brush transfer device 11 and four polishing plates 12 to 1
5 and the drive base 16.

The brush transport device 11 moves the toothbrush TB in the right direction (arrow) so that the bristle tip TF of the toothbrush TB draws a linear trajectory LC.
It is designed to be moved in the M1 direction). In the brush transfer device 11, for example, a plurality of moving bodies 11a capable of sandwiching the ends of the handle HD of the toothbrush TB have arrows at a speed of, for example, about 100 mm / Sec.
It is configured as a conveyor that moves linearly in the M1 direction and circulates.

The polishing plates 12 to 15 are, for example, disk-shaped with a diameter of about 100 mm, press contact with the bristle tips TF of the toothbrush TB, and have their respective rotation center positions alternately opposite to the locus CL of the bristle tips TF. Are arranged as follows. These four polishing plates 12
The pair of polishing plates 12 and 13 arranged in front of the first to 15th ones are for roughing, and those having a grain size of 180 to 240 are used. On the other hand, the pair of polishing plates 14 and 15 arranged later are for finishing, and for example, those having a grain size of 300 or more are used.

Further, the bristle tips TF are strongly pressed against the polishing plates 12 and 13 arranged in front and weakly pressed against the polishing plates 14 and 15 arranged after. Therefore, the polishing plates 14 and 15 arranged later
The polishing plates 12 and 13 arranged in front of this protrude upward.

The drive base 16 rotatably supports the polishing plates 12 to 15, and a variable speed motor and a power transmission device (not shown) incorporated therein to move the four polishing plates 12 to 15 in the same direction (arrow M2). Direction), for example, rotationally driven at 1000 to 1800 RPM.

FIG. 3 is an enlarged view showing a state in which the bristle tip TF is pressed against the polishing plate 12.

When the free length (hair length) of the filament FM is, for example, 9.5 mm, the distance h from the lower surface of the handle HD to the upper surfaces of the polishing plates 12 to 15 is smaller than that of the polishing plates 12 and 13 for rough processing. It is about 6.5 to 7 mm, and about 8.5 to 9 mm for the polishing plates 14 and 15 for finishing.

Therefore, in the filament FM, the tips TF of the filament FM are pressed against the polishing plates 12 and 13 for roughing to be curved, and are rotated in an oblique direction with respect to the axis of the tips TF by the rotation of the polishing plates 12 and 13.
The entire circumference of the bristle tip TF is polished. Next, in the filament FM, the tips TF of the filaments FM are weakly pressed against the polishing plates 14 and 15 for finishing, and are slightly curved, and the tips of the tips TF are roundly polished by the rotation of the polishing plates 14 and 15 to finish. To be

After all, the toothbrush TB is transported by the brush transport device 11,
As the tip TF passes through the locus LC, the tip TF is polished and finished into a predetermined shape.

FIG. 4 is a view showing a preferable shape of the polished tip TF.

As shown in the figure, the polished tip TF has a smooth rounded curve, for example, an elliptic shape or a parabolic shape, and the length a of the polished portion is, for example, the diameter b of the filament FM. It is about 1.5 to 4 times.

FIG. 5 is a view showing another shape of the polished tip TF.

As shown variously in this figure, the polished tip TF
The shape of the filament FM material, position, length, hardness,
Various shapes can be taken depending on the deviation from the locus LC, the state of the polishing plates 12 to 15, and the like.

According to the above-described embodiment, since the bristle tips TF of a large number of toothbrushes TB can be continuously polished, it is possible to increase the processing amount per unit time and significantly improve the productivity. is there. The brush transfer device 11 may be one that moves the toothbrush TB continuously at a constant speed, so that the configuration of the brush transfer device 11 is simple, there are few failures, maintenance is easy, and the manufacturing cost is low. Low. Since the polishing plates 12 to 15 for polishing the bristle tips TF have a simple shape, and the drive base 16 for supporting and rotating the polishing plates 12 to 15 has a simple structure, failure occurs. There are few, easy assembly and maintenance, and low manufacturing cost.

According to the above-mentioned embodiment, the plurality of polishing plates 12 to 15 have the tips TF.
Since the rotation center positions of the polishing plates 12 to 15 are alternately located on the opposite side with respect to the locus LC of
Can be made to have the same rotation direction, the structure of the drive base 16 can be simplified, and the interval between the polishing plates 12 to 15 adjacent to each other can be narrowed, so that the processing apparatus 1 can be miniaturized. be able to.

Further, since the polishing plates 12 and 13 arranged in front are for roughing, and the polishing plates 14 and 15 arranged after are for finishing,
The hair tips TF can be neatly finished into a predetermined shape.

In the above-described embodiment, 2 for roughing and 2 for finishing.
Although it has been decided to perform processing in stages, there may be one stage or three or more stages. Although four polishing plates 12 to 15 are used, three or less polishing plates or five or more polishing plates may be used. The structure, shape, size, number, speed, rotation speed, etc. of the brush transport device 11, the polishing plates 12 to 15, and the drive base 16 can be various other than those described above.

〔The invention's effect〕

According to the invention of claim 1, the bristle tips of the brush can be easily polished by the processing device having a simple structure.

According to the second aspect of the present invention, it is possible to provide a processing device having a simple structure for polishing the bristle tips of the brush and having a low manufacturing cost.

In any of these inventions, the shape of the polishing plate is simple and the structure of the rotation driving means for supporting and rotating the polishing plate is simple, so that there are few failures and assembly and maintenance are easy. Further, since the polishing plates are used efficiently and the interval between the polishing plates adjacent to each other can be narrowed, the processing apparatus can be downsized.

[Brief description of drawings]

FIG. 1 is a plan view of a processing apparatus according to the present invention, FIG. 2 is a front view of the processing apparatus according to the present invention, and FIG. 3 is an enlarged view showing a state in which a tip of a hair is pressed against a polishing plate. FIG. 5 is a diagram showing a preferred shape of a polished tip, FIG. 5 is a figure showing another shape of a polished tip, and FIGS. 6 and 7 are views for explaining the principle of the method of the present invention. FIG. 8 is a diagram schematically showing a conventional hair tip processing device. 1 ... Processing device, 11 ... Brush transfer device (brush transfer means), 12-15 ... Polishing plate, 16 ... Drive base (rotational drive means), DK ... Polishing plate, TB ... Toothbrush (brush) ), TF ...
… Bristles, LC, LC1, LC2… trajectory.

Claims (2)

[Claims] 1. A plurality of disc-shaped polishing plates are arranged such that their rotation centers are located on opposite sides of a linear locus, and at least two pairs of polishing plates adjacent to each other among the polishing plates are arranged. Characterized in that the polishing plate is rotated so that the rotation directions of the polishing plate are the same, and the brush is moved along the trajectory while the bristle tips of the brush are pressed against the surface of the polishing plate. Brush tip processing method. 2. A plurality of disk-shaped polishing plates arranged so that their centers of rotation are located on opposite sides of a linear locus, and at least two pairs of polishing plates adjacent to each other among the polishing plates. A rotation driving unit that rotationally drives the polishing plate so that the rotation direction of the plate is the same, and a state in which the brush tip is held so as to be pressed against the surface of the polishing plate, the brush is moved along the trajectory. A brush bristle tip processing device, comprising: a brush transfer unit that moves the brush.