JP2003245135A - Manufacturing method of brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing a method of a brush which enables to manufacture a brush with excellent orientation of bristle bundles and in which bristles are orderly aligned. <P>SOLUTION: The manufacturing method of the brush comprises a bristle introducing process for introducing a prescribed number of bristles to an introducing part, and a bristle insertion process for pushing out the bristles introduced to the introducing part by a push out means and inserting them into an insertion part. The bristles are pushed out by the push out means and inserted into the insertion part up to a prescribed depth, and the introducing part is made to move in a direction reverse to the bristle pushing out direction, or, the push out means is separated from the bristle after making the push out means and the insertion part move in the bristle pushing out direction, and making the end part of the push out means side of bristles expose from the inside of the introducing part. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush manufacturing method, and more particularly to a brush manufacturing method suitable for manufacturing a toothbrush.

[0002]

2. Description of the Related Art A step of introducing a predetermined number of hairs into an introducing portion, and a step of pushing out the hairs introduced into the introducing portion by an extruding means to an inserting portion. As a conventional technique relating to a method of manufacturing a brush including a step of inserting bristles to be inserted, for example, Japanese Patent No. 3226
The technology of No. 276 is known. This technology uses a picking tube to separate a specified number of hairs from a set of hairs that have been cut to a specified length, then clamps the separated hairs with a vise, and relaxes the clamping force of the vise. The tip of the bristle is made uneven with the vise, and the hair is pinched again with a vise, and then inserted into the bristle hole of the bristle base, and the bristle is fixed by injection molding.

By the way, according to this technique, since the hair is inserted into the tufting hole while being sandwiched by the vise, there is a case where the arrangement of the hair is disturbed depending on the filling rate of the hair bundle. Further, no consideration is given to oblique hair transplantation, and when such a conventional technique is used, hair is obliquely transplanted,
When the tips of the bristle are three-dimensionally arranged for flocking (also referred to as three-dimensional flocking), it is difficult to cleanly align the hair tips and flock the hair.

Therefore, an object of the present invention is to provide a method of manufacturing a brush which is excellent in the orientation of a bristle bundle and which can manufacture a brush in which the bristle is neatly aligned.
Here, the excellent orientation of the hair bundle means that the individual hairs forming the hair bundle extend in the length direction of the hair bundle without being twisted or bent and are neatly gathered as a bundle. , The state that the hairs are neatly aligned means that the tips of the individual hairs are arranged in a predetermined alignment form so that the tips of the hair bundles have a desired shape in accordance with the orientation of the hair bundles. It means that they are neatly arranged.

[0005]

According to the present invention, there is provided a step of introducing a predetermined number of hairs into an introducing portion, and the hairs introduced into the introducing portion are extruded by an extruding means into an inserting portion. In the method for manufacturing a brush, which comprises a step of inserting bristles to be inserted, the bristles are pushed out by the pushing means to be inserted into the insertion part to a predetermined depth, and the introduction part is in a direction opposite to the pushing direction of the bristles. Or the pressing means and the insertion portion are moved in the pushing direction of the bristle to expose the end portion of the bristle on the pushing means side from the inside of the introducing portion, and then the pushing means is used. The object is achieved by providing a method for manufacturing a brush, which is characterized in that the brush is separated from the bristles.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below as a preferred embodiment based on an embodiment applied to manufacturing a toothbrush with reference to the drawings. In the following description, a toothbrush manufacturing method using the toothbrush manufacturing apparatus (hereinafter, also referred to as a manufacturing apparatus) illustrated in FIGS. 1 and 2 will be described based on the method.

1 to 3 schematically show a manufacturing apparatus used in this embodiment. In these drawings, reference numeral 1 is a manufacturing apparatus, 11 is a toothbrush body, 12 is a flocked base, and 12a is a flocked hole provided in the flocked base 12.

As shown in FIGS. 1 and 2, the manufacturing apparatus 1
Is a hair-collecting means 2 for accumulating a large number of hairs 13 cut into a predetermined length, and a predetermined number of hairs 13 are separated from a set of the hairs 13 accumulated by the hair-collecting means 2 at a predetermined position. Separation and transfer means 3 for transferring and bristles 13 that have been separated and transferred are aligned section 4
The first aligning means 4 for aligning in the lengthwise direction or the radial direction without restraining in 0, and the aligning portion 4 for the separated and transferred bristles 13.
0 for the hair introducing means 5, second aligning means 6 for further aligning the aligned hairs 13 in the lengthwise or radial direction without restraining them in the aligning part (introducing part) 60, and the aligning part. Hair introduction means 7 for guiding the hair 13 aligned by 40 to the alignment section 60.
A hair feeding means 8 for feeding the bristle 13 aligned by the aligning section 60 to the outside of the aligning section 60, and an orienting means 9 for orienting the bristle 13 fed by the delivering means 8 in a predetermined direction. ing.

The hair collecting means 2 arranges the bristles 13 in a standing state in a groove-shaped accumulating portion 21 provided on the base table 20 from the rear to the front (hereinafter, this direction will be referred to as x).
Also called direction. ) A device that presses and collects the bristles 13 at a predetermined density.

The separating and transferring means 3 is arranged in front of the hair collecting means 2 along a direction orthogonal to the x direction (hereinafter, this direction is also referred to as y direction), and the sheath portion 30.
And a picking blade 31 arranged therein is reciprocally moved in the y direction at a predetermined timing to sandwich and separate a predetermined number of hairs 13 from the set of hairs 13 accumulated in the accumulating portion 21, It is a device for transferring to a predetermined position.

The first aligning means 4 is introduced into the aligning portion 40 of the aligning sleeve 41 mounted on the rotor 42 while the rotor 42 intermittently rotates horizontally around the main shaft 42a by the index unit 43a. Hair 1
3 is sucked and held in the alignment portion 40 through the air passage 41a provided in the alignment sleeve 41, while the upper end portion of the bristle 13 is tapped with the tap pins 44, 45, 46 and air is blown with the air blower 48. And the tip of the bristle 13 is aligned with the bottom plate 42d, and the bristle 13 is aligned in the length direction and the radial direction.

In this embodiment, assuming that the position of the rotor 42 at 9 o'clock when viewed in plan is 0 degree, hair is introduced into the alignment sleeve 41 at the 0 degree position, and the hair is rotated counterclockwise from 0 degree. The upper ends of the bristles are tapped by the tap pins 44, 45, and 46 at positions of 45 degrees, 90 degrees, and 135 degrees, respectively.
The transfer to is done. The same 315
At the degree position, the inside of the alignment sleeve 41 is cleaned by the air blower for cleaning.

The bristle introducing means 5 has a suction conduit 5 arranged below the alignment sleeve 41 at the 0 degree position.
Hairs 1 transferred to a predetermined position by the separating and transferring means 3 by suction by downward airflow in the alignment section 40 through 0 and forced tapping by the pressing rod 51.
3 is a device for introducing 3 into the alignment section 40.

The second aligning means 6 inserts the bristle 13 introduced into the aligning portion 60 while transferring the eight insert sleeves 61 having the aligning portion 60 therein in a predetermined circular orbit. 61 is sucked and held through an air passage 61a provided on the upper part 61, while the upper end of the bristles 13 is tapped by a tap pin 6
This is a device for tapping with 4, 65, 66 and blowing air with an air blower 68 to align the tip ends of the bristles 13 with the bottom plate 62d and to align the bristles 13 in the length direction and the radial direction.

In the manufacturing apparatus 1, when the 9 o'clock position when the rotor 62 is viewed in plan is 0 °, the hair is transferred from the alignment sleeve 41 to the insertion sleeve 61 at the 0 ° position, and
The upper ends of the bristles are tapped by the tap pins 64, 65, and 66 at positions of 45, 90, and 135 degrees clockwise from the angle, and are fixed to the xy stage unit 92 described later at a position of 180 degrees. Hair bundle holding jig 91
The bristle 13 is inserted into the insertion hole 90 of the. At the 270 degree position, the inside of the insertion sleeve 61 is cleaned by an air blower (not shown) for cleaning.

As shown in FIG. 3, the insertion sleeve 61 is
It has a sleeve body 61b and a nozzle portion 61c protruding from the lower end of the sleeve body 61b. Sleeve 61
The aligning portion 60 is provided inside the casing so as to vertically penetrate from the sleeve body 61b to the nozzle portion 61c. The upper end of the alignment portion 60 is gradually expanded in diameter so that an insertion pin (extrusion means) 81 of the delivery means 8 described later can be easily inserted.

The ratio (As / Ai) of the cross-sectional area As orthogonal to the delivery direction of the nozzle portion 61c and the cross-sectional area Ai orthogonal to the insertion depth direction of the hair-implanting hole 12a and the insertion portion is (As / Ai). Since it is constrained in the state of being planted in the flocked base, it keeps good fluffing after flocking, and prevents leakage of resin into the flocked holes 12 when the back surface of the flocked base is filled with molten resin. It is preferably 1.0 to 1.3.

The bristle introducing means 7 is a suction conduit 7 arranged below the insertion sleeve 61 at the 0 degree position.
0, a downward airflow is generated in the aligning portion 60 to be sucked, and the hairs 13 aligned in the aligning portion 40 are pushed downward by the pushing pin 73 to be introduced into the aligning portion 60, and the receiving pin It is a device for aligning the tips at the upper end of 71.

The bristle feeding means 8 moves the insertion sleeve 61 up and down by a vertically moving mechanism (not shown), so that the bristle 13 aligned in the alignment portion 60 is inserted into the insertion pin (extruding means). ) 81 and inserts it into the insertion hole 90 of the hair bundle holding jig 91 described later.

The insertion pin 81 has a structure in which the insertion pin 81 is aligned.
Hair 1 from the viewpoint of preventing the hair 13 from being bitten into the insertion pin 81 and the alignment portion 60.
It is preferable to provide a predetermined clearance smaller than the diameter of 3 (the maximum clearance between the outer circumference of the insertion pin 81 and the inner circumference of the straight portion of the alignment portion 60). The clearance is
It is preferably 0.03 to 0.15 mm. Also,
The tip shape of the insertion pin 81 has a hair bundle holding jig 91 to be described later.
It is preferable that the insertion hole 90 has a shape substantially corresponding to the tip shape of the insertion hole 90 and is provided in a stepped shape.

The hair bundle holding jig 91 for the orienting means 9 is
Recessed portion 91a corresponding to the flocked base portion 12 of the toothbrush body 11
And an upper plate portion 91b having a middle plate portion 9 disposed below the upper plate portion 91b.
1c and the lower plate part 91d fixed below it. The insertion hole 90 is formed in a predetermined direction so as to communicate with the lower plate portion 91d from the upper plate portion 91b.
The middle plate portion 91c is arranged so as to be movable back and forth, and the hair 13
When the hair 1 is inserted into the insertion hole 90, the hair 13 is slid so that a force in the shearing direction acts on the hair 13.
When the hair bundle holding jig 91 is moved after the orientation of No. 3, the orientation of the hair 13 inserted in the insertion hole 90 is prevented from being displaced.

The xy stage unit 92 is a device for moving the bristle bundle holding jig 91 two-dimensionally along a horizontal plane, and is a substrate portion of the toothbrush body 11 fixed on the bristle bundle holding jig 91. The hair bundle holding jig 91 is moved so that the 12 tufted holes 12a are positioned at the ascending / descending position of the insertion pin 81.

A part of the flocked holes 12a of the flocked portion 12 is
As shown in FIG. 4, a part of the insertion depth direction is provided at a predetermined angle θ with respect to the pushing direction (z direction) of the bristle. This range is preferably −20 to 20 ° from the viewpoint of ensuring the inter-tooth reach speed and plaque removal drop. Further, the insertion port of the hair-implanted hole 12a is provided in a taper shape so as to gradually expand outward. The angle α is set to absorb the positional deviation between the insertion sleeve 61 and the introduction hole 12a to ensure that the hair is inserted into the introduction hole 12a, or to increase the hair implantation density of the hair implantation hole 12a. To be smoothly inserted into the flocked holes 12a, or to prevent the resin from leaking to the flocked holes 12a when the back side of the flocked base is filled with the molten resin after the insertion of the bristles,
Alternatively, the resin is hardened in the expanded portion to increase the flocking strength (pull-out strength of the tuft for hair).
It is preferably -50 °. If the angle is too wide, when the bristles hit the taper part during insertion, bending stress is applied in the length direction of the bristles, which may cause hair breakage and subsequent insertion errors or irregular fuzzing, as well as hair transplant holes. The intervals between the 12a may become too wide.

The manufacturing apparatus 1 has a control section (not shown) equipped with a sequencer which operates the above-mentioned means in synchronization in accordance with a predetermined sequence, and a series of operations from the separation of the hair 13 to the insertion thereof. Is configured to be automatic.

Next, the method of manufacturing the toothbrush of this embodiment will be described based on the method of manufacturing a brush using the manufacturing apparatus 1.

In the present embodiment, first, as shown in FIG. 1, the hairs 13 having a predetermined length are vertically aligned in the accumulating portion 21 of the hair collecting means 2 and accumulated at a predetermined accumulation density.
The accumulation density of the hairs 13 depends on the thickness of the hairs 13, the material of the hairs,
Although it can be appropriately set according to the length of the bristle, it is preferably 50 to 75%, and more preferably 55 to 70% from the viewpoint of easily separating the bristle 13.
Here, the accumulated density of hairs is the ratio (percentage) of the total cross-sectional area of the accumulated hairs per unit area.

The bristle 13 may be made of the usual materials and forms conventionally used for toothbrush bristle without particular limitation. Examples of the material of the bristles 13 include polyamide such as nylon, polyester such as polybutylene terephthalate and polytrimethylene terephthalate. The length of the bristles 13 is preferably 5 to 20 mm, more preferably 8 to 18 mm. The thickness of the bristle 13 is 6 to 10 mil (127 to 254 μm)
Is preferable, and 7 to 9 mil (178 to 229)
μm) is more preferable.

Next, in a hair separating step, a predetermined number of hairs 13 are separated from the set of hairs 13 cut into a predetermined length. In this embodiment, the separation and transfer means 3 is used to collect the accumulation portion 21.
A predetermined number of bristles 13 are separated from the set of bristles 13 accumulated in. Then, the bristles 13 are moved in the y-direction, and the rotor 42 is positioned above the alignment sleeve 41 at the 0 degree position when viewed in plan and substantially coaxially therewith.

Next, in the step of aligning the bristle, the separated bristle 13 is guided to the aligning portion 40 of the aligning sleeve 41 of the first aligning means 4 and is restrained in its length direction or diameter. Align in the direction. Here, “without restraint” means a state in which the bristles 13 easily fall freely in the alignment portion 40 without support (holding).

In the step of aligning the bristle, the bristle 13 introduced into the aligning section 40 is held by the air flow of the negative pressure suction through the ventilation passage 41a of the aligning sleeve 41. This holding by the airflow prevents the bristles 13 from dropping from the inside of the alignment sleeve 41 in the portion where the bottom plate 42c is not present. In this state, the rotor 42 moves counterclockwise to approximately 4
Rotate 180 degrees in 5 degree increments. During this time, the tap pins 44 to 46 tap the upper ends of the bristle 13 in the aligning portion 40 to align the bristle 13 in the length direction and the radial direction. In addition, the air blower 48 blows air into the aligning section 40 so that all the hairs 13 are stored in the aligning section 40.
The tips of the hairs 13 are aligned with the bottom plate 42c.

Next, in the step of introducing the bristle, the length of the bristle 13 aligned by the first aligning means 4 is guided to the aligning portion (introducing portion) 60 in the insertion sleeve 61 without being restrained. Orientationally and radially.

In the present embodiment, when the rotor 42 is rotated 180 degrees from the 0 degree position, the alignment sleeve 41 is rotated.
A negative pressure is sucked by the negative pressure source through the intake pipe line 70 of the bristle introducing means 7 inside the alignment portion 60 of the insertion sleeve 61 located coaxially therebelow. On the other hand, the push pin 73 of the bristle introducing means 7 descends, pushes the bristle 13 aligned in the aligning section 40 downward from the aligning section 40, and the upper end of the bristle 13 aligns with the aligning sleeve 41.
The bristle 13 is pushed in until it passes through the air passage 41a, and the negative pressure is released. Then, the hair 13 is inserted into the insertion sleeve 61 by the downward airflow due to the negative pressure suction through the intake pipe line 70.
It is quickly guided into the alignment section 60 of. The bristle 13 is stopped at the upper end surface of the receiving pin 71.

Then, the ventilation passage 6 of the insertion sleeve 61.
The bristles 13 formed in the alignment portion 60 are held by the air flow by negative pressure suction through the la 1a. This holding by the airflow prevents the bristles 13 from dropping from the inside of the insertion sleeve 61 in the portion without the bottom plate 62d. In this state, the rotor 62 is rotated clockwise in steps of about 45 degrees.
Rotate 0 degrees. During this time, the tap pins 64 to 66 tap the upper end portion of the bristle 13 to align the bristle 13 in the longitudinal direction. In addition, the air blower 48 blows air into the aligning portion 60 so that all the hairs 13 are housed in the aligning portion 60, and the tips of the hairs 13 are aligned with the bottom plate 62d. The density of the bristle in the alignment part 60 is arranged in the length direction and the radial direction without restraining the bristle by the airflow flowing between the bristle,
60 to 6 from the viewpoint that the aligned hairs have a higher density than the aligning section 40 so that the hairs can be stably inserted into the hair transplant holes 12a.
It is preferably 8%.

Next, in the step of inserting the hairs (inserting step), the aligned hairs 13 are inserted into the insertion holes 90 of the hair bundle holding jig 91 and oriented in a predetermined direction. In the present embodiment, the brush main body 11 having the flocked base 12 having the flocked holes 12a at the tip is preliminarily molded, and the brush main body 11 is formed.
Is fixed on the bristle bundle holding jig 91 in such a manner that the tufted holes 12a are aligned with the insertion holes 90. And the insertion sleeve 6
In step 1, the hair 13 is inserted into the insertion hole 90 by the insertion pin 81 via the hair transplant hole 12a.

In this embodiment, the timing of raising and lowering the insertion sleeve 61 and the insertion pin 81 at the 3 o'clock position of the rotor 62 is set as follows.

First, as shown in FIG. 5 (a), the insertion sleeve 61 has a predetermined gap with respect to the upper surface of the flocked base 12 of the toothbrush main body whose tip is fixed to the bristle bundle holding jig 91. Descend to have G. The range of the gap G is preferably 0.1 to 5 mm from the viewpoint of stably inserting the bristles 13 and preventing contact between the tip of the insertion sleeve 61 and the bristle base 12.

Next, as shown in FIGS. 5 (b) and 5 (c), the insertion pin 81 descends from above the bristle 13 in the alignment portion 60 to the lowest point, and pushes the bristle 13 downward. At this time, all the bristles 13 are inserted into the insertion hole 91 in a state where they are substantially straight in the axial direction. Further, since the tip of the insertion pin 81 is provided in a stepped shape corresponding to the tip of the insertion hole 90 of the hair bundle holding jig 91, the shape of the tip of the hair 13 becomes the insertion hole 90. The hairs 13 are prepared before being inserted, and it is possible to insert the hair 13 corresponding to the shape of the tip of the insertion hole 90, which is the final shape of the hair transplant. Figure 5
As shown in (c), the tip end portion of the insertion pin 81 is set so as to be positioned inside the insertion sleeve 61 even when it is lowered to the lowest point.

The length of the bristle protruding from the upper surface of the flocked base is preferably 0.3 to 1.5 mm. If the protruding length is too long, it may take a long time to form a molten mass that is in close contact with the insertion port of the hair-implanting hole 12a, and if it is too short, the hair-implanting strength (hair bundle pull-out strength) may be weak.

When the insertion pin 81 reaches the lowest point, the hair 13
When the insertion into the insertion hole 90 is completed, the insertion sleeve 61 starts to rise earlier than the insertion pin 81 as shown in FIG. The tip of the insertion sleeve 61 is the upper end of all the hairs 13 (the end on the insertion pin 81 side).
After being further raised to expose the upper end of the bristle 13 from inside the alignment portion 60, the insertion pin 81 is raised to a predetermined position and separated from the bristle 13 as shown in FIG. 5 (e). . Then, the operation of inserting the hair 13 into the insertion hole 90 is completed.

The tip of the insert pin 81 and the insert sleeve 6 when the tip of the insert pin 81 is lowered to the lowest point
The distance from the tip portion of 1 is that the bristle 13 fed from the tip of the insertion sleeve 61 can be prevented from spreading until the bristle 13 is inserted into the tuft hole 12a. It is preferably 0.5 to 5 mm from the viewpoint of enabling stable insertion of all the end portions of the.

After the insertion operation for one insertion hole 90 is completed, the insertion hole 90 for inserting the bristle 13 next is the above-mentioned three.
After the xy stage unit 92 is operated so as to be positioned at the current position, the hair 13 is oriented by the above procedure.

Next, the brush main body 11 is transferred together with the bristle bundle holding jig 91 to a melting station (not shown) at the projecting end of the bristle 13, and the bristle protruding to the back side of the bristle bristle base 12. Laser beam, heater,
It is melted by various melting means (not shown) such as ultrasonic waves to form a molten mass having a larger cross section than the hair-implanted hole 12a, and the molten masses of the adjacent bristles 13 are connected to each other.

In this embodiment, the flocked base 12 is arranged on the hair bundle holder 9, and the protruding end is melted to form a molten mass. It does not spoil the appearance even if it is soaked. Further, since the hair 13 is inserted through the hair-implanting holes 12a and restrained before the molten mass is formed, the hair is disturbed even when pressure is applied by a press heater or the like when the molten mass is formed. Can be suppressed. In addition, in the present embodiment, the bristle bristle holding jig 91 positions and fixes the bristle bristle base 12 and the bristle 13 has the bristle holes 1
Since it is held in the insertion hole 90 by being constrained by 2a in an aligned state, as will be described later, the flocked base portion on which the bristles are planted is positioned and fixed on the bristle bundle holding jig after the orientation step. It can be transferred to a process. Therefore, it is possible to suppress the disturbance of the orientation of the hair (hair raising) in the subsequent process.

After forming the molten mass, the brush main body 11 is transferred as it is together with the above-mentioned bristle bundle holding jig 91 to a molding station (not shown) on the back surface of the bristle bristle base 12, where injection molding and back plate forming are performed. The toothbrush 1 is completed by adhering, covering with an adhesive resin or a covering substrate to form a flocked portion.

As described above, according to the manufacturing apparatus 1 of this embodiment and the method of manufacturing a toothbrush using the same, when the tip portion of the bristle 13 is three-dimensionally flocked or the bristle is obliquely flocked. Also in this case, it is possible to stably and rapidly manufacture a toothbrush in which the tips of the bristles 13 are arranged neatly without spreading and the orientation of the bristles is excellent.

The present invention is not limited to the above-described embodiment, but can be modified as appropriate without departing from the spirit of the present invention.

In the method for manufacturing hair according to the present invention, as in the above embodiment, the insertion sleeve 61 is moved in the direction opposite to the pushing direction so that the end of the hair on the side of the insertion pin 81 is removed from the alignment portion 60. Although it is preferable to expose it, the insertion pin 81 and the hair bundle holder 91 for hair are simultaneously moved further in the pushing direction to expose the end of the hair 13 on the side of the insertion pin 81 from the alignment portion 60. You can also do so.

In the method for manufacturing hair according to the present invention, as in the manufacturing apparatus 1, it is preferable to use one nozzle portion 61b and the insertion sleeve 61 having the introduction hole 60, but a plurality of nozzle portions and sleeves are used as the sleeve. It is also possible to use one having an introduction hole.

Further, in the above-mentioned embodiment, the bristle is inserted into the insertion hole of the bristle bundle holding jig through the bristle bristle hole in the bristle bristle base, but the target of insertion of the bristle is not limited to this. is not. For example, the insertion hole of a jig having a plurality of insertion holes such as a hair bristle insertion hole provided in a mold forming a cavity of a bristle portion of a toothbrush and a carriage for orienting a plurality of hair tufts in a predetermined direction. Etc. can also be the insertion target of the hair bundle.

Further, according to the present invention, as in the above-mentioned embodiment, the flocked base portion having the flocked holes is fixed on the hair bundle holding jig having the insertion holes, and the bristles are inserted into the insertion holes through the flocked holes. It is particularly suitable for a method of manufacturing a brush having a step of inserting and orienting, but a brush using a mold having an insertion hole for orienting the bristles in a predetermined direction, without using a flocking base and a bristles holding jig for the bristles. Can also be applied to the manufacturing method. In this case, various manufacturing conditions relating to the bristle-implanting base portion and the hair-implanting hole in the above-mentioned embodiment can be applied by substituting the conditions relating to the mold and the insertion hole.

Further, according to the present invention, when the hairs are aligned without being restrained as in the above embodiment, the hairs in the alignment portion are removed by negative pressure suction through the air passages of the alignment sleeve and the insertion sleeve. It is preferable to hold it, but instead of this, a shutter for preventing hair fall may be provided on each sleeve, and the sleeve may be opened and closed according to the moving position of the sleeve.

Further, according to the present invention, as in the above embodiment, in addition to aligning the hair by gradually narrowing the alignment space of the alignment portion between the alignment sleeve and the insertion sleeve, the hair in the alignment portion can be aligned. As a method of aligning the hairs, it is preferable to use a method of aligning the hairs by negative pressure suction through each air passage of the alignment sleeve and the insertion sleeve, tapping with each tap pin, and air blow with an air blower. These negative pressure suction, tapping, and air blow can be used alone or in combination of two. Further, as a method of aligning the bristles in the aligning section, a method of vibrating each sleeve with a predetermined vibration can be used, and the method can be used alone or in combination with each method.

Further, in the above embodiment, the hair bundle holding jig 9 for hair is bundled one by one through the hair transplant holes 12a of the hair transplant base 12.
Although the hairs are arranged to be inserted into the first insertion hole 90, the aligned hairs are once transferred to an insertion jig (carrier) having a plurality of insertion holes, and then the hair insertion holes of the hair transplant base or It is also possible to insert them collectively or individually into the insertion holes of the mold.

The present invention is as in the above embodiment,
Particularly suitable for manufacturing toothbrushes, but for manufacturing brushes other than toothbrushes, such as hairbrushes, massage brushes,
It can also be applied to the production of cleaning brushes and various other brushes.

[0055]

According to the present invention, it is possible to stably manufacture a brush in which the bristle bundle is excellent in the orientation and the bristle is neatly arranged.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a procedure in one embodiment in which a method for manufacturing a brush of the present invention is applied to manufacturing a toothbrush.

FIG. 2 is a plan view schematically showing a main part of a toothbrush manufacturing apparatus used in the same embodiment.

FIG. 3 is a diagram showing a state in which hairs are pushed out by an insertion pin and inserted into a hair-implanting hole.

FIG. 4 is an enlarged cross-sectional view of a main part schematically showing a state in which the hair is inserted into the hair-implantation hole by the insertion sleeve.

5A and 5B are diagrams schematically showing a hair bundle inserting step in the manufacturing apparatus, wherein FIG. 5A is a view showing a state where the insertion sleeve has reached the lowest point, and FIG. 5B is a hair bundle with an insertion pin. Showing a state in which the insertion of the hair bundle is completed by the insertion pin, (d) showing a state in which only the insertion sleeve is elevated, (e) raising the insertion pin It is a figure which shows the state which is doing.

[Explanation of symbols]

1 Toothbrush manufacturing equipment (brush manufacturing equipment) 2 Hair collection means 3 Separation and transfer means 4 First alignment means 40 Alignment section 41 Alignment sleeve 5 Hair introduction means 6 Second aligning means 60 Alignment part (introduction part) 61 Insert sleeve 7 Hair introduction means 8 Hair delivery means 81 Insertion pin (extrusion means) 9 Hair orientation means 90 Insertion hole (insertion part) Hair bundle holding jig for 91 11 Toothbrush body 12 Flocked base 12a hair transplant pores 13 hair

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinji Hamamoto             Kao Stock Exchange 2606, Akabane, Kai-cho, Haga-gun, Tochigi Prefecture             Company research institute F term (reference) 3B202 AA06 AB19 BA15 ED08 EE01                       EF10 EG01 JA03

Claims (5)

[Claims] 1. A step of introducing hairs for introducing a predetermined number of hairs into an introduction portion, and a step of inserting hairs that are introduced into the introduction portion and pushed out by an extruding means into an insertion portion. In the method for manufacturing a brush comprising, the bristles are pushed out by the pushing means to be inserted into the insertion portion to a predetermined depth, and the introduction portion is moved in a direction opposite to the pushing direction of the bristles or the pressing means. And moving the insertion portion in the pushing direction of the bristle to expose the end portion of the bristle on the pushing means side from the inside of the introducing portion, and then separating the pushing means from the bristle. Brush manufacturing method. 2. The method for manufacturing a brush according to claim 1, wherein the insertion portion is provided in a molding die. 3. The method for manufacturing a brush according to claim 1, wherein the bristles are inserted into the insertion portion through a flocked hole provided in a flocked base portion of the brush. 4. The insertion part or the insertion port of the flocked hole is provided so as to gradually increase in diameter toward the outside.
The method for manufacturing the brush according to any one of 1. 5. The insertion portion or the tufting hole is provided such that the insertion depth direction of the bristle is inclined at a predetermined angle with respect to the pushing direction of the bristle, and the bristle is pushed in the pushing direction. The method for manufacturing a brush according to claim 1, wherein the brush is extruded and inserted into the brush.