WO2017175793A1

WO2017175793A1 - Bristle removal method, bristle removal device, toothbrush production method, and toothbrush production device

Info

Publication number: WO2017175793A1
Application number: PCT/JP2017/014207
Authority: WO
Inventors: 秀生天辰; 松下　滋; 健作岡本; 裕司田中
Original assignee: ライオン株式会社; ライオンエンジニアリング株式会社
Priority date: 2016-04-05
Filing date: 2017-04-05
Publication date: 2017-10-12
Also published as: CN109068844A; KR20180130486A; KR102343609B1; CN109068844B; JPWO2017175793A1; JP6872531B2

Abstract

The purpose of the present invention is to provide a bristle removal method with which it is possible to limit quality defects and cost increases. The bristle removal method includes: a detecting step in which, for a defective bristle (20A) exceeding a prescribed height, the position in the bristle-tip height direction and the position in the head-section length direction are detected; a first moving step in which, on the basis of the bristle-tip position detected in the detecting step, the head section (18) and a separated plurality of gripping parts (31), which are provided as longer than the width of the head section and extend parallel to a bristle implanting surface and along the width direction of the head section, are moved relative to each other, and said bristle tip is placed between the separated plurality of gripping parts; a gripping step in which at least one of the plurality of gripping parts is moved, and said bristle tip is gripped by the plurality of gripping parts at a first position in the height direction; a second moving step in which the head section and the plurality of gripping parts gripping said bristle tip are moved relative to each other, and the plurality of gripping parts gripping said bristle tip are placed at a second position that is nearer to the bristle implanting surface (18a) than the first position; a winding step in which said defective bristle is wound around the outer peripheral surface of the gripping parts by rotating, at a position that is nearer to the bristle implanting surface than the first position, the plurality of gripping parts gripping said bristle tip around an axis that intersects the height direction; and a third moving step in which the head section and the plurality of gripping parts around which said defective bristle is wound are moved relative to each other, and the plurality of gripping parts around which said defective bristle is wound are placed at a third position that is further away from the bristle implanting surface than the first position.

Description

Tweezers, tweezers, toothbrush manufacturing method and toothbrush manufacturing apparatus

The present invention relates to a tweezer method, a tweezer, a toothbrush manufacturing method, and a toothbrush manufacturing device, and a tweezer method, a tweezer, and a toothbrush manufacture that are suitable for removing defective hair (long hair) of a toothbrush in which tapered hair is planted by a flat wire. The present invention relates to a method and a toothbrush manufacturing apparatus.
The present application claims priority based on Japanese Patent Application No. 2016-076165 filed in Japan on April 5, 2016, the contents of which are incorporated herein by reference.

Toothbrushes obtained by flocking hair bundles with a flat wire have conventionally produced a process of manufacturing a brush body including a head part by injection molding or the like, and a plurality of flock holes formed in the head part of the manufactured brush body. Produced and manufactured through a flocking process for planting hair bundles, a hair cutting process for adjusting the height of the implanted hair by cutting the hair tips, and a tip rounding process for polishing the corners of the hair tips The inspected toothbrush is inspected for flocking failure and then shipped after being packaged (Patent Document 1). Therefore, even if the heights of the hairs planted in the hair transplanting process are uneven, it is possible to make adjustments such as aligning the hair height to a predetermined height in the hair cutting process.

In recent years, many toothbrushes in which tapered bristles that are easy to enter between teeth have been planted have been used (for example, see Patent Document 2). Tapered hair is characterized by the fact that the tip of the bristles is narrowed and thin, so adopting a hair-cutting process that adjusts the height of the implanted hair as before will cut the tip of the tapered hair It is not preferable because it becomes thicker as much as it is done. Therefore, when using taper hair, the flocking conditions are adjusted so that the heights of the flocked hair in the flocking process are aligned, and defective hair (long hair) that protrudes from the predetermined height to the flocking direction due to poor flocking is obtained. When this occurs, the defective hair is removed and removed manually. For example, the defective hair is manually pulled out by pinching the defective hair with a tool such as pliers. However, if the tip of the long hair is pulled, the hair may be broken and may not come off. Therefore, after gripping the tip of the long hair with a tool, it is pulled out of the outer periphery of the flocked surface in the gripped state, and then the gripping position is slid to the root of the long hair and pulled out with the root sandwiched. Since it is necessary to perform such an operation on each of the defective hairs, there is a problem in that the cost is increased.

Patent Document 3 discloses a toothbrush fallen device for toothbrush that can be pulled out over the entire outermost contour of the toothbrush over the outermost contour of the toothbrush. There was a problem that removal of long hair could not be dealt with.

Japanese Patent Laid-Open No. 2002-199939 Japanese Patent No. 3145213 JP 7-155223 A

The present invention has been made in consideration of the above points, and an object thereof is to provide a tweezer method, a tweezer, a toothbrush manufacturing method, and a toothbrush manufacturing device capable of suppressing quality defects and cost increase.

According to the first aspect of the present invention, in the method for removing defective hair that protrudes from the predetermined height in the toothbrush in which the bristles of the tapered hairs are planted using a flat wire at a predetermined height on the flocked surface of the head portion. A detecting step for detecting a position in the height direction of the defective hair protruding from the predetermined height and a position in the length direction of the head portion; and a position of the hair tip detected in the detecting step. Based on the above, a plurality of spaced-apart clamping pieces and the head portion, which extend in parallel to the flocked surface in the width direction of the head portion and are longer than the width of the head portion, are separated from each other. A first movement step of disposing the bristles between a plurality of clamping pieces; and moving the at least one of the plurality of clamping pieces to move the bristles to a first position in the height direction by the plurality of clamping pieces. A clamping step of clamping with the hair tip, A second moving step of relatively moving the plurality of sandwiching pieces and the head portion, and disposing the plurality of sandwiching pieces sandwiching the hair tips at a second position closer to the flocked surface than the first position; The plurality of holding pieces holding the bristles are rotated around an axis intersecting the height direction at a position closer to the flocked surface than the first position, and the defective hair is formed on the outer peripheral surface of the holding piece. Winding step, and moving the plurality of sandwiching pieces around which the defective hair is wound and the head part, and moving the plurality of sandwiching pieces around which the defective hair is wound away from the flocked surface rather than the first position. And a step of disposing in a third position.

Moreover, in the tweezers method according to the one aspect of the present invention, the clamping piece has a W1 / W2 which is a ratio of the maximum width W1 in the direction of clamping the hair tip and the maximum width W2 in the height direction of 0. .5 or more.

Further, in the tweezer method according to one aspect of the present invention, in the winding step, the plurality of sandwiching pieces are rotated around the axis by ½ rotation or more.

Further, in the tweezers method according to one aspect of the present invention, the plurality of sandwiching pieces are moved around the axis at a rotation speed corresponding to a relative movement speed between the plurality of sandwiching pieces and the head portion in the second movement step. It is made to rotate.

The hair removal method according to one aspect of the present invention is characterized by including a step of redetecting the presence or absence of the defective hair protruding from at least the predetermined height after the extraction step.

According to the second aspect of the present invention, a step of planting a bundle of tapered hairs with a predetermined height on the planted surface of the head portion using a flat line, and the inspection of the tapered hair planted in the planting step There is provided a toothbrush manufacturing method comprising: an inspection step to perform; and a step of extracting the defective hair protruding from the predetermined height by the hair removal method of the first aspect of the present invention.

According to the third aspect of the present invention, there is provided a hair removal device for defective hair that protrudes from the predetermined height in a toothbrush in which a bundle of tapered hairs is planted using a flat wire at a predetermined height on the hair transplantation surface of the head portion. A detection unit for detecting a position of a hair tip of the defective hair protruding from the predetermined height, a plurality of clamping pieces capable of clamping the hair tip, a position for clamping the hair tip, and the hair tip A first drive unit that drives at least one of the plurality of clamping pieces between the position where the clamping is released, the plurality of clamping pieces and the head unit in a direction parallel to the flocked surface and the height A second drive unit that relatively drives in the direction, a third drive unit that drives the plurality of holding pieces to rotate around an axis that intersects the height direction and winds the defective hair around the outer peripheral surface of the holding piece, The first drive unit according to the detection result of the detection unit, The second drive unit and the third drive unit are controlled to move the plurality of spaced-apart clamping pieces and the head portion relative to each other, and after the hair ends are arranged between the plurality of spaced-apart clamping pieces, The bristles are clamped at a first position in the height direction by a plurality of clamping pieces, and then the plurality of clamping pieces that clamp the bristles are at a second position closer to the flocked surface than the first position. Arranged, rotated around the axis intersecting the height direction at a position closer to the flocked surface than the first position, wound the defective hair around the outer peripheral surface of the sandwiching piece, and wound the defective hair There is provided a tweezers comprising: a drive control unit that arranges a plurality of clamping pieces at a third position farther from the flocked surface than the first position.

Further, in the tweezers according to one aspect of the present invention, the clamping piece has a ratio W1 / W2 that is a ratio of the maximum width W1 in the direction in which the bristles are clamped and the maximum width W2 in the height direction is 0. .5 or more.

Further, in the tweezers according to one aspect of the present invention, the drive control unit rotates the plurality of holding pieces 1/2 times around the axis when the defective hair is wound around the outer peripheral surface of the holding pieces. It is characterized by being rotated as described above.

Further, in the tweezers according to one aspect of the present invention, the plurality of sandwiching pieces and the head portion are disposed while the plurality of sandwiching pieces sandwiching the hair tips are disposed from the first position to the second position. The plurality of holding pieces are rotated around the axis at a rotational speed corresponding to the relative movement speed.

Further, in the tweezers according to one aspect of the present invention, the plurality of sandwiching pieces extend in parallel to the flocked surface in the width direction of the head portion, and are provided longer than the width of the head portion, A detection part detects the position of the said height direction of the said hair tip, and the position of the length direction of the said head part, It is characterized by the above-mentioned.

Further, in the tweezers according to one aspect of the present invention, the plurality of sandwiching pieces each have an uneven shape that meshes with each other when joined.

According to the fourth aspect of the present invention, a hair-planting device for planting a bundle of tapered hairs at a predetermined height on the hair-planting surface of the head portion using a flat wire, and the taper hair planted by the hair-planting device is inspected. There is provided a toothbrush manufacturing apparatus comprising: an inspection apparatus that performs the above-described inspection; and a hair removal apparatus according to a third aspect of the present invention that extracts defective hair that has protruded from the predetermined height.

In the present invention, it is possible to suppress quality defects and cost increase.

It is a figure which shows embodiment of this invention, Comprising: (a) is the front view by which the clamping piece 11 of the tweezer 10 was arrange | positioned above the toothbrush 1, (b) is a right view. FIG. 3 is an enlarged cross-sectional view of the vicinity of one bristle bundle in the head portion 18 of the toothbrush 1. 4 is a block diagram relating to driving of a clamping piece 31. FIG. It is a figure which shows operation | movement of a tweezers. It is a figure which shows operation | movement of a tweezers. It is a figure which shows operation | movement of a tweezers. It is a figure which shows operation | movement of a tweezers. It is a figure which shows operation | movement of a tweezers. It is a schematic block diagram of the toothbrush manufacturing apparatus 50. It is a front view which shows another form of a clamping piece. It is a front view which shows another form of a clamping piece. It is a front view which shows another form of a clamping piece. It is a front view which shows another form of a clamping piece.

Hereinafter, embodiments of a tweezer method, a tweezer, a toothbrush manufacturing method, and a toothbrush manufacturing device according to the present invention will be described with reference to FIGS. 1 to 10. Below, the case where this invention is applied with respect to the toothbrush by which the taper hair was planted by the head part is demonstrated.

The following embodiment shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each configuration easy to understand, the actual structure is different from the scale and number of each structure.

[Tweeping method and tweezers]
The tweezers will be described with reference to FIGS. 1 to 3. FIG. 1A is a front view in which the pinching piece 31 of the tweezer 30 is disposed above the toothbrush 1, and FIG. 1B is a right side view of FIG.
In FIG. 1, as an example, a configuration in which the sandwiching piece 31 of the tweezer 30 is disposed above the toothbrush 1 is illustrated, but the sandwiching piece 31 is disposed below the toothbrush 1. Also good.

In the following description, the length direction of the toothbrush 1 is the X direction, the width direction of the toothbrush 1 is the Y direction, and the direction orthogonal to the X direction and the Y direction (thickness direction of the toothbrush 1) is appropriately used as the Z direction. .

First, the toothbrush (brush) 1 that is a target of hair removal by the hair removal device 30 will be briefly described. The toothbrush 1 includes a handle body 10 and a brush portion 22 formed of a plurality of hair bundles 12 implanted in the handle body 10. The handle body 10 is provided with a rod-like handle portion (not shown in FIG. 1), a neck portion 17 that is narrower than the handle portion, and a tip portion of the neck portion 17. And a head portion 18 in which the bundle 12 is implanted. The plurality of hair bundles 12 are implanted on the flocked surface 18 a of the head portion 18.

The material of the handle body 10 is a hard resin such as polypropylene, polyacetal, or polybutylene terephthalate. The overall length of the handle body 10 is about 100 to 200 mm. The head portion 18 is formed in a substantially rectangular flat plate shape in which four top portions are cut off with curved lines. The dimensions of the head portion 18 are about 5 to 16 mm in width, about 10 to 33 mm in length, and about 3 to 5 mm in thickness.

The number of flock holes 18a is 10 to 60 as an example. The diameter of the flocked hole 18a is, for example, 1 to 3 mm. The planar shape of the flock holes 18a may be a circle or a polygon such as a quadrangle, and the arrangement pattern may be a lattice or a staggered pattern.

FIG. 2 is an enlarged cross-sectional view of the vicinity of one hair bundle in the head portion 18 of the toothbrush 1. The hair bundle 12 is formed by bundling a plurality of tapered hairs 20. The hair | bristle bundle 12 is planted by the flocked surface 18a by the flat wire type | formula flocking method. Specifically, as shown in FIG. 2, a plurality of taper hairs 20 having taper portions 21 provided at both ends are bundled and folded in half with a flat wire 24 that is a metal piece, and the flocked surface of the head portion 18. The hair bundle 12 is implanted at a height (predetermined height) H from the flocked surface 18a by being driven into the flocked hole 23 formed in 18a.

The taper bristles 20 are provided with a taper portion 21 whose diameter decreases toward the tip at a portion closer to the tip than the straight portion 19. The material of the taper hair 20 is a synthetic resin such as polyester, polyamide, or polyolefin, but polybutylene terephthalate (PBT) is often used. As a processing method of the taper part 21, the method of chemically processing the hair end of the monofilament made from PBT with a strong alkali is generally used. As an example of the monofilament, it is cylindrical and has a total length of 31 mm and a thickness of the central part of about 6 to 8 mil (1 mil = 0.025 mm).

The hair length (length from the planted surface 18a to the hair tip) H of the tapered hair 20 when it is fixed by being folded in half into the planted hole 23 is, for example, about 10 to 12 mm. A typical taper bristles 20 used for the toothbrush 1 has a tip diameter of 0.02 mm, a taper length (a length from the bristles to the start position of the taper shape) L of about 8 mm, and a position 1 mm from the bristles. The diameter at 0.05 to 0.07 mm and the position of 3 mm is as sharp as 0.11 to 0.14 mm. For this reason, the position where the long hair having a length of 1 to 3 mm generated due to defective hair transplantation is pulled out is very thin, and when it is gripped and pulled out, it is broken.

In addition, the flocking strength (browning strength) of the bristle bundle 12 in the toothbrush 1 is defined by JIS S3016, and the maximum tensile force that can be pulled by a tensile testing machine is measured, and is defined as 8 [N] or more. The toothbrush 1 requires a certain level of bristling strength, and preferably has a higher strength. Therefore, it becomes more difficult to remove the long hair of the tapered hair 20 described above.

Returning to FIG. 1, as shown in FIGS. 1 (a) and 1 (b), the tweezer 30 is configured such that the clamping piece 31, the detection unit 32, the drive unit group 33, and the head unit 18 of the toothbrush 1 are separated from the flocked surface 18a. A head holding part (not shown) and a drive control part CONT that hold from the opposite surface are provided. The clamping piece 31 is disposed on the + Z side of the brush portion 22. The clamping pieces 31 extend in the Y direction, which is the width direction of the head portion 18 and parallel to the flocked surface 18a, and are provided in pairs in the X direction. Each clamping piece 31 is formed in a semi-cylindrical shape with the plane portions facing each other. As an example, the sandwiching piece 31 has a columnar shape with a diameter of 3.0 mm when joined at the plane portion. The sandwiching piece 31 is longer than the width of the head portion 18 and is disposed so as to cover a range in which the head portion 18 is provided in the width direction. For example, if the maximum width of the head portion 18 is 15 mm, the length of the clamping piece 31 is set to about 30 mm. The clamping piece 31 is made of, for example, high hardness chromium molybdenum steel.

The clamping piece 31 moves in a direction in which at least one of them approaches, and a clamping position (see FIG. 5 (a)) at which the flat portion can be joined, and a release position in which at least one moves away (see FIG. 1 (a)). , See FIG. 4 (a)). In this embodiment, each sandwiching piece 31 is described as a configuration that can move in a direction approaching and separating from each other, but either one moves in a direction approaching and separating from the other. It may be. The pair of sandwiching pieces 31 are formed in a columnar shape when they are brought into contact with each other at the flat portion, that is, when moved to the sandwiching position. The sandwiching piece 31 may be either cantilevered support or both-end support, but it is preferable to adopt a configuration of both-end support in order to clamp more firmly.

FIG. 3 is a block diagram relating to driving of the sandwiching piece 31. The drive unit group 33 includes a sandwiching drive unit (first drive unit) 41, a horizontal drive unit (second drive unit) 42, a rotation drive unit (third drive unit) 43, and a height drive unit (second drive unit) 44. including. The drive unit group 33 is comprehensively controlled by the drive control unit CONT.

The sandwiching drive unit 41 moves the pair of sandwiching pieces 31 synchronously along the X direction between the sandwiching position and the release position. The horizontal drive unit 42 relatively moves the pair of clamping pieces 31 and the head unit 18 (toothbrush 1) in the X direction.

The rotation drive unit 43 rotates the pair of clamping pieces 31 around the cylindrical central axis in the clamping position state or the release position state. The height driving unit 44 relatively moves the pair of sandwiching pieces 31 and the head unit 18 (toothbrush 1) in the Z direction (the height direction of the hair bundle 12).

In the present embodiment, a configuration in which the pair of clamping pieces 31 moves in the X direction by driving the horizontal driving unit 42 and the pair of clamping pieces 31 moves in the Z direction by driving the height driving unit 44 will be described. The head unit 18 (toothbrush 1) moves in the X direction by driving the driving unit 42, and the head unit 18 (toothbrush 1) moves in the Z direction by driving the height driving unit 44, or the driving of the horizontal driving unit 42. As a result, both the pair of sandwiching pieces 31 and the head portion 18 (toothbrush 1) move in the X direction, and the height driving unit 44 drives both the pair of sandwiching pieces 31 and the head portion 18 (toothbrush 1) in the Z direction. The structure which moves may be sufficient.

The detection unit 32 detects the amount of protrusion of the bristles and the position of the bristles in the tapered bristles 20 that have jumped out from a predetermined height beyond a predetermined length (hereinafter referred to as defective hair 20A). To do. As an example, the protruding length reference for the defective hair 20A is 1 mm or more. As shown in FIG. 1B, the detection unit 32 detects, for example, the defective hair 20A from the + Y side, the position in the X direction of the hair tip of the defective hair 20A exceeding the protruding length reference, and Z Detect the position of the direction. As a position detection method by the detection unit 32, for example, a method of detecting an image obtained by imaging the brush unit 22 according to a result of image processing, or a result of scanning with detection light toward the brush unit 22 (reflection of reflected light). The position in the X direction and the position in the Z direction of the defective hair 20A are detected according to the presence / absence and presence / absence of light reception at a predetermined position. The detection result of the detection unit 32 is output to the drive control unit CONT.

Next, a method for removing the defective hair 20A by the above-described hair removal device 30 will be described with reference to FIGS. 4 to 8, illustration of the detection unit 32, the drive unit group 33, and the drive control unit CONT is omitted.

First, after the toothbrush 1 (head unit 18) is held by the head holding unit, the detection unit 32 performs an imaging process and a detection light scanning process on the held brush unit 22, and then jumps out from the height H to reference the length. The detection process of the defective hair 20 </ b> A that has jumped out beyond is performed. When the defective hair 20A is detected, the detection unit 32 outputs the position of the tip of the defective hair 20A in the X direction to the drive control unit CONT.

When the position in the X direction and the position in the Z direction of the tip of the defective hair 20A are input, the drive control unit CONT controls the sandwiching drive unit 41 to move the pair of sandwiching pieces 31 to the release position and At a position in the Z direction higher than the tip of the hair 20A (hereinafter referred to as Z position), the center position of the pair of sandwiching pieces 31 is the position in the X direction of the tip of the defective hair 20A (hereinafter referred to as X position). 4 (a) and 4 (b), the height drive unit 44 is controlled so that the protruding hair ends of the pair of sandwiching pieces 31 are moved. The clamping piece 31 is moved in the direction approaching the flocked surface 18a so as to be positioned between them (first moving step). The Z position at the center of the sandwiching piece 31 at this time is set to be higher than the height H so as not to come into contact with the tapered hair 20 different from the protruding defective hair 20A.

Next, the drive control unit CONT controls the clamping drive unit 41 to move the pair of clamping pieces 31 to the clamping position as shown in FIGS. 5 (a) and 5 (b). Thereby, the hair end of 20 A of defective hair is clamped between a pair of clamping pieces 31 in the 1st position higher than the height H (clamping process).

Next, the drive control part CONT controls the height drive part 44, and as shown in FIGS. 6A and 6B, the pair of holding pieces 31 holding the hair ends of the defective hair 20A are The second position is moved closer to the flocked surface 18 than the first position (second movement step). Since the bristle tips sandwiched between the pair of sandwiching pieces 31 are thin portions as described above, when the pair of sandwiching pieces 31 rotate and wind the defective hair 20A around the outer peripheral surface as described later, An angle exceeding 90 degrees of the peripheral length of the outer peripheral surface, for example, a length corresponding to 1/2 rotation (180 degrees), so that excessive tension is not applied to the hair tips by 1/4 rotation (90 degrees). Is set to the second position.

Next, the drive control part CONT controls the rotation drive part 43, and as shown to FIG. 7 (a), (b), a pair of clamping piece 31 which clamps a hair tip in a 2nd position is cylindrical. Rotate around the central axis to wind the defective hair 20A around the outer peripheral surfaces of the pair of sandwiching pieces 31 (winding step). The rotation amount of the pair of clamping pieces 31 is preferably ½ rotation or more, and more preferably 3/4 rotation or more. When the rotation amount of the pair of sandwiching pieces 31 is below the lower limit value, the minimum diameter of the defective hair 20A that is not wound around the outer peripheral surface is thin, and the defective hair 20A is caused by the tension generated with the rotation of the pair of sandwiching pieces 31. There is a possibility of tearing.

For example, when the taper length L is 8 mm, the protruding length of the defective hair 20A is 1 mm, and the circumferential length of the pair of sandwiching pieces 31 is 3 × π, the rotation amount of the pair of sandwiching pieces 31 is 1/2 turn. About 70% of the taper length is wound around the outer peripheral surface. Further, when the rotation amount of the pair of sandwiching pieces 31 is 3/4, almost 100% of the taper length is wound around the outer peripheral surface. Therefore, the minimum diameter of the defective hair 20A that is not wound around the outer peripheral surface is a value close to the diameter of the central portion of the defective hair 20A as compared with the diameter of the hair tip.

In addition, when there is too much rotation amount, since the moving distance of a pair of clamping piece 31 in a 2nd moving process becomes long, it may have a bad influence on productivity. In addition, when the diameter of the pair of sandwiching pieces 31 is increased, the movement distance of the pair of sandwiching pieces 31 in the second movement step is increased, so that the second position is closer to the flocked surface 18a. Or the pinching piece 31 may come into contact with the flocked surface 18a.

Therefore, it is preferable that the pair of sandwiching pieces 31 is thin as long as the strength when the tip of the defective hair 20A is sandwiched and the strength when the defective hair 20A is wound around the outer peripheral surface can be secured. Moreover, it is preferable to set the rotation amount of the pair of sandwiching pieces 31 in consideration of the taper length L of the defective hair 20A.

When the defective hair 20A is wound around the outer peripheral surfaces of the pair of sandwiching pieces 31 at a predetermined angle, the drive control unit CONT controls the height driving unit 44 to sandwich the defective hair 20A as shown in FIGS. The piece 31 is moved relative to the head portion 18 from the flocked surface 18a to the third position higher than the height H than the first position (third movement step). Due to the rising of the sandwiching piece 31, the defective hair 20A wound around the outer peripheral surface of the sandwiching piece 31 is extracted from the head unit 18 including the part that is folded in half and disposed on the opposite side across the flat wire 24. It is.

When the moving speed of the pair of sandwiching pieces 31 in the third moving process is slow, the productivity is lowered, and when the moving speed is fast, the defective hair 20A may be cut off, so that the defective hair 20A is not cut off. It is preferable that the fastest moving speed is set.

As described above, in the hair removal device 30 according to the present embodiment, even when the defective hair 20A that protrudes from the predetermined height H after the hair flocking is generated, the hair tip portion is torn off without depending on human hands. The defective hair 20A that causes poor hair transplantation can be extracted. Therefore, in the hair removal device 30 of this embodiment, it is possible to extract the defective hair 20A without causing an increase in cost and a quality defect.

Moreover, in the hair removal apparatus 30 of this embodiment, since the outer peripheral surface is formed in the column shape without an edge when the pair of clamping pieces 31 move to the clamping position, the defective hair 20A wound around the outer peripheral surface is formed. It can suppress that stress concentrates and fractures (breaks). Moreover, in the tweezer 30 of this embodiment, since the clamping piece 31 extends in parallel with the flocked surface 18a in the width direction of the head portion 18 and is longer than the width of the head portion 18, In the width direction, it is not necessary to adjust the position of the clamping piece 31 according to the position of the defective hair 20A, and the efficiency of the hair removal process can be increased.

In the above embodiment, the procedure for performing the winding process after the completion of the second movement process is exemplified, but the procedure for performing the winding process as part of the second movement process may be used. For example, after the tip of the defective hair 20A is clamped by the pair of clamping pieces 31 at the first position, the pair of clamping pieces 31 are moved by a predetermined distance toward the second position so that excessive tension is not applied to the hair tips. Then, after forming the deflection on the defective hair 20A, the movement of the pair of sandwiching pieces 31 to the second position and the winding of the defective hair 20A around the outer peripheral surface by the rotation of the pair of sandwiching pieces 31 are performed in parallel. May be.

In this case, the winding length of the defective hair 20A around the outer peripheral surface due to the rotation of the pair of clamping pieces 31 is shorter than the bending length of the defective hair 20A caused by the movement of the pair of clamping pieces 31 to the second position. By setting the rotational speed of the pair of sandwiching pieces 31 so as to be, it is possible to avoid applying excessive tension to the defective hair 20A.

Specifically, the diameter of the cylindrical holding piece 31 is D (mm), and the rotation speed of the holding piece 31 by the operation of the rotation drive unit 43 (that is, the winding speed of the defective hair 20A) is R (rotation / sec). When the circumference ratio is π and the descending speed V (mm / sec) of the clamping piece 31 due to the operation of the height driving unit 44, the deflection length of the defective hair 20A generated per unit time and the outer peripheral surface per unit time. The relationship with the length of the wound defective hair 20A preferably satisfies the following formula (1).
V ≧ π · R · D (1)
From the equation (1), the rotation speed of the sandwiching piece 31 is preferably set to a value represented by the following equation (2).
R ≦ V / (π · D) (2)

In consideration of productivity, it is preferable that the winding of the defective hair 20A around the outer peripheral surface of the sandwiching piece 31 is completed when the sandwiching piece 31 reaches the second position. Therefore, the distance between the position in the height direction where rotation of the sandwiching piece 31 starts and the second position is L1 (mm), and the amount of rotation of the pair of sandwiching pieces 31 around which the defective hair 20A is wound around the outer peripheral surface is N rotation Then, the relationship between the movement time to the 2nd position of the clamping piece 31 and the time to wind the defective hair 20A around the outer peripheral surface of the clamping piece 31 is represented by the following formula (3).
R · (L1 / V) = N (3)

Therefore, by rotating the clamping piece 31 at the rotational speed R represented by the following formula (4), it is not necessary to separately provide a time for winding the defective hair 20A around the outer peripheral surface of the clamping piece 31.
R = N · (V / L1) (4)
For example, as described above, when the rotation amount of the pair of sandwiching pieces 31 around which the defective hair 20A is wound around the outer peripheral surface is ½ rotation, the rotational speed R is expressed as V / (2 × L1) from the equation (4). Should be set.

Thus, it becomes possible to improve productivity by carrying out in parallel the process of winding the defective hair 20A around the outer peripheral surface of the sandwiching piece 31 in the second movement process. In particular, by rotating the clamping piece 31 at the rotational speed R that satisfies the formula (4), it is not necessary to separately provide a time for winding the defective hair 20A around the outer peripheral surface of the clamping piece 31, and the productivity can be further improved. it can.

[Toothbrush manufacturing method and toothbrush manufacturing apparatus]
Next, a toothbrush manufacturing method and a toothbrush manufacturing apparatus will be described with reference to FIG. FIG. 9 is a schematic configuration diagram of the toothbrush manufacturing apparatus 50.

The toothbrush manufacturing apparatus 50 includes a flocking device 60, a conveying device 70, and the above-described tweezers 30. The flocking device 60 drives the tapered bristles 20 into the flat wires 24 by driving a bunch of tapered hairs 20 and the flat wires 24 into the flock holes 23 of the head portion 18 held by the head holding portion with a flocking needle. Fold it in half and plant it in the flock hole 23. In addition, the hair transplantation device 60 sequentially implants the hair bundles of the tapered hairs 20 in each of the flocked holes 23 by moving the head portion 18 in accordance with the arrangement of the plurality of flocked holes 23.

The toothbrush 1 in which the bristles of the tapered bristles 20 are implanted by the flocking device 60 is conveyed to the tweezer 30 by the conveying device 70. As described above, the toothbrush 1 conveyed to the tweezer 30 detects and removes the defective hair 20 </ b> A protruding from the head unit 18. Thus, in the toothbrush manufacturing apparatus 50 of this embodiment, even when the defective hair 20A which protruded from the predetermined height H arises in the taper hair 20 planted by the hair transplanting device 60, it does not depend on a human hand. Inspection and tweezers can be carried out, and quality defects can be suppressed and costs can be reduced.

For transferring the toothbrush 1 from the hair transplantation device 60 to the hair removal device 30, the head holding portion in a state where the head portion 18 is held in the hair transplantation device 60 is conveyed and used as a head holding portion in the hair removal device 30 for inspection and hair removal. The toothbrush 1 removed from the head holding part in the flocking device 60 may be carried to the tweezer 30, and the conveyed toothbrush 1 may be held on the head holding part in the tweezer 30 to perform inspection and tweezing. May be.

As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the above-described embodiment, the configuration in which the opposing surface (clamping surface) of the clamping piece 31 is a plane is not limited to this. For example, as shown in FIG. The structure which each has uneven | corrugated shape may be sufficient. When the clamping piece 31 has this configuration, there is a place where the clamping direction between the clamping pieces 31 and the clamping direction between the clamping surfaces of each clamping piece 31 are different, so the defective hair 20A is clamped more firmly. It becomes possible.

Moreover, in the said embodiment, the procedure which pulls out the defective hair 20A from the head part 18 by raising the clamping piece 31 which wound up the defective hair 20A on the outer peripheral surface from the 2nd position near the base end part of the defective hair 20A. However, the present invention is not limited to this. For example, in a state where the drive control unit CONT controls the height driving unit 44 and stops the clamping piece 31 at the second position, the rotation driving unit 43 is controlled to clamp the defective piece 20A in the winding direction. It is good also as a procedure which rotates 20 and pulls out the defective hair 20A with respect to the head part 18. FIG.

By adopting this procedure, the extraction direction of the defective hair 20A is inclined with respect to the Z direction in which the flat line 24 is driven, so that the resistance due to the flat line 24 at the time of extraction can be reduced.

Moreover, in the said embodiment, although the structure which winds up the defective hair 20A was illustrated while the clamping piece 31 moved to the 2nd position, it is not limited to this structure, For example, after the clamping piece 31 clamps the defective hair 20A It may be configured to move to the second position as it is, and then rotate to wind up the defective hair 20A on the outer peripheral surface.

Moreover, in the said embodiment, although the structure which clamps and pulls out the defective hair 20A with a pair (two) of clamping pieces 31 as a plurality of clamping pieces 31 was illustrated, it is not limited to this structure, Three or more The structure using this holding piece may be sufficient. For example, as shown in FIG. 11, the configuration may be such that the defective hair 20 </ b> A is clamped and extracted using three clamping pieces 31 obtained by dividing a cylinder at 120 ° intervals at the clamping position. Moreover, also when using the three or more clamping pieces 31, as above-mentioned, it is good also as a structure which has the uneven | corrugated shape which mutually meshes | engages in a clamping position. In any configuration of the plurality of clamping pieces 31, the clamping surfaces may be subjected to a roughening process such as blasting so as to increase the surface area so as to make it difficult to slip.

In the above-described embodiment, the configuration in which the clamping piece 31 is formed in a cylindrical shape at the clamping position is exemplified. However, in addition to this configuration, for example, a configuration in which the clamping piece 31 is formed in a prismatic shape may be used. In FIG. 12, the example of the clamping piece 31 formed in square pole shape in a clamping position is shown. When the sandwiching piece 31 has a prismatic shape, it is preferable to form a curved surface such as an arc at the corner portion of the sandwiching piece 31 in order to prevent the defective hair 20A from being broken during winding.

In addition, when the hair ends of the pair of sandwiching pieces 31 are sandwiched, warping may occur in a direction in which the sandwiched positions are separated from each other. This warp also occurs when the clamping piece 31 is formed of high-hardness chromium molybdenum steel. Therefore, as a cross-sectional shape of the pair of sandwiching pieces 31, as shown in FIG. 13, it is preferable that the maximum width W1 in the pinching direction of the bristles is larger than the maximum width W2 in the height direction. By making the maximum width W1 larger than the maximum width W2, it is possible to reduce the warp (deflection) that occurs when the hair ends are sandwiched without significantly increasing the peripheral length of the outer peripheral surface.

The maximum width W2 in the height direction of the sandwiching piece 31 is preferably 1 to 3 mm. The ratio (W1 / W2) of the maximum width W1 in the clamping direction and the maximum width W2 in the height direction of the clamping piece 31 is preferably 0.5 or more, more preferably 1.0 or more, and still more preferably 1.2 or more. It is. The peripheral length of the outer peripheral surface of the pair of sandwiched pieces 31 joined is preferably 14 mm or less, more preferably 12 mm or less, and further preferably 10 mm or less.
As described above, when the bristle length H is about 10 to 12 mm and the taper length L is about 8 mm, the maximum width W1 in the clamping direction and the maximum width W2 in the height direction of the clamping piece 31 are set in the above ranges. Thereby, the rotation speed of the clamping piece 31 when winding the defective hair 20A around the outer peripheral surface can be set to 1/2 or more, preferably 3/4 or more.

It is preferable that the outer peripheral surfaces of the pair of sandwiching pieces 31 have an oval shape such as an elliptical shape or an elliptical shape having a major axis in the sandwiching direction so that no edge is formed.

Moreover, in the said embodiment, although the structure which the clamping piece 31 moves to a horizontal direction and a height direction with respect to the toothbrush 1 was illustrated, it is not limited to this structure, The toothbrush 1 is connected via a head holding | maintenance part. The structure which moves to a horizontal direction and a height direction with respect to the clamping piece 31 may be sufficient.

Moreover, in the said embodiment, although the structure which extracts the 20 A of defective hair planted by the toothbrush 1 with the tweezer 30 which concerns on this invention was illustrated, an application object is not restricted to the toothbrush 1, A taper hair or a taper hair like It can be widely used for inspection / manufacturing of brushes using thin brushes with reduced hair tips, for example, brushes, brushes, or makeup brushes.

The present invention can be applied to a tweezer method, a tweezer, a toothbrush manufacturing method, and a toothbrush manufacturing device.

DESCRIPTION OF SYMBOLS 1 ... Toothbrush (brush), 18 ... Head part, 18a ... Flocking surface, 20 ... Tapered hair, 20A ... Bad hair, 30 ... Tweezer, 31 ... Nipping piece, 41 ... Nipping drive part (1st drive part), 42 ... horizontal driving part (second driving part), 43 ... rotation driving part (third driving part), 44 ... height driving part (second driving part), 50 ... toothbrush manufacturing device, CONT ... drive control part, H ... Height (predetermined height)

Claims

A hair removal method for defective hair that protrudes from the predetermined height in a toothbrush in which a hair bundle of tapered hair is planted using a flat wire at a predetermined height on the hair transplantation surface of the head part,
A detection step of detecting the position in the height direction and the position in the length direction of the head portion of the defective hair that has jumped out of the predetermined height;
Based on the position of the hair tip detected in the detection step, the plurality of holding pieces that extend in parallel with the flocked surface in the width direction of the head part, are provided longer than the width of the head part, and are separated from each other. A first movement step of moving the head part relative to each other and disposing the hair tip between a plurality of spaced clamping pieces;
A sandwiching step of moving at least one of the plurality of sandwiching pieces and sandwiching the hair tip at the first position in the height direction by the plurality of sandwiching pieces;
The plurality of sandwiching pieces sandwiching the hair tips are moved relative to each other, and the plurality of sandwiching pieces sandwiching the hair tips are disposed at a second position closer to the flocking surface than the first position. A second moving step;
The plurality of holding pieces holding the bristles are rotated around an axis intersecting the height direction at a position closer to the flocked surface than the first position, and the defective hair is put on the outer peripheral surface of the holding piece. Winding process of winding,
The plurality of sandwiching pieces wound with the defective hair and the head portion are relatively moved, and the plurality of sandwiching pieces wound with the defective hair are arranged at a third position farther from the flocked surface than the first position. And a process of
A tweezers method comprising:
The said clamping piece is W1 / W2 which is ratio of the maximum width W1 of the direction which clamps the said hair tip, and the maximum width W2 of the said height direction being 0.5 or more, The characterized by the above-mentioned. Tweezers.
3. The tweezer method according to claim 1, wherein, in the winding step, the plurality of sandwiching pieces are rotated about ½ rotation or more around the axis.
4. The method according to claim 1, wherein in the second movement step, the plurality of clamping pieces are rotated around the axis at a rotation speed corresponding to a relative movement speed between the plurality of clamping pieces and the head portion. The tweezers method according to claim 1.
5. The tweezers method according to any one of claims 1 to 4, further comprising a step of re-detecting the presence or absence of the defective hair protruding from the predetermined height after the extraction step.
A flocking step of flocking a hair bundle of tapered hair at a predetermined height on the flocking surface of the head portion using a flat wire;
An inspection process for inspecting the tapered hair implanted in the hair implantation process;
A method of manufacturing a toothbrush, comprising: a step of extracting the defective hair protruding from the predetermined height by the method of removing hair according to any one of claims 1 to 5.
A hair removal device for defective hair that protrudes from the predetermined height in a toothbrush in which a bristles of tapered hair is planted using a flat wire at a predetermined height on the flocked surface of the head part,
A detection unit for detecting a position of a hair tip in the defective hair that has jumped out of the predetermined height;
A plurality of clamping pieces capable of clamping the bristles;
A first drive unit that drives at least one of the plurality of clamping pieces between a position where the hair ends are clamped and a position where the clamping of the hair ends is released;
A second drive unit that relatively drives the plurality of clamping pieces and the head unit in a direction parallel to the flocked surface and in the height direction;
A third driving unit that rotationally drives the plurality of clamping pieces around an axis intersecting the height direction and winds the defective hair around an outer peripheral surface of the clamping pieces;
According to the detection result of the detection unit, the first driving unit, the second driving unit, and the third driving unit are controlled to relatively move the plurality of spaced holding pieces and the head unit, thereby separating the plurality of spaced units. After the hair ends are arranged between the sandwiching pieces, the plurality of sandwiching pieces cause the hair tips to be sandwiched at the first position in the height direction, and the plurality of sandwiching pieces sandwiching the hair tips are thereafter The outer peripheral surface of the holding piece is disposed at a second position closer to the flocked surface than the first position, and is rotated around an axis intersecting the height direction at a position closer to the flocked surface than the first position. A drive control unit that winds the defective hair and arranges the plurality of sandwiching pieces wound with the defective hair at a third position farther from the flocking surface than the first position;
A tweezer device comprising:
The said clamping piece is W1 / W2 which is ratio of the maximum width W1 of the direction which clamps the said hair | bristle tip, and the maximum width W2 of the said height direction being 0.5 or more, It is characterized by the above-mentioned. Tweezers.
9. The drive control unit according to claim 7 or 8, wherein when the defective hair is wound around an outer peripheral surface of the sandwiching piece, the plurality of sandwiching pieces are rotated around the axis by 1/2 turn or more. Tweezers.
The drive control unit responds to a relative moving speed between the plurality of sandwiching pieces and the head unit while arranging the plurality of sandwiching pieces sandwiching the hair tips from the first position to the second position. The tweezers according to any one of claims 7 to 9, wherein the plurality of clamping pieces are rotated around the axis at a rotational speed.
The plurality of sandwiching pieces extend in parallel with the flocked surface in the width direction of the head portion, and are provided longer than the width of the head portion,
The tweezers according to any one of claims 7 to 10, wherein the detection unit detects a position in the height direction of the hair tip and a position in the length direction of the head portion.
The tweezers according to any one of claims 7 to 11, wherein each of the plurality of sandwiching pieces has an uneven shape that meshes with each other when joined.
A flocking device for flocking a hair bundle of tapered hair at a predetermined height on the flocking surface of the head using a flat wire;
An inspection device for inspecting the tapered hair implanted by the hair implantation device;
A toothbrush manufacturing apparatus comprising: the hair removal device according to any one of claims 7 to 12, wherein defective hairs protruding from the predetermined height are extracted.