WO2017056539A1 - Brush and brush manufacturing method - Google Patents

Brush and brush manufacturing method Download PDF

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Publication number
WO2017056539A1
WO2017056539A1 PCT/JP2016/062313 JP2016062313W WO2017056539A1 WO 2017056539 A1 WO2017056539 A1 WO 2017056539A1 JP 2016062313 W JP2016062313 W JP 2016062313W WO 2017056539 A1 WO2017056539 A1 WO 2017056539A1
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WO
WIPO (PCT)
Prior art keywords
hair bundle
head
hair
head portion
brush
Prior art date
Application number
PCT/JP2016/062313
Other languages
French (fr)
Japanese (ja)
Inventor
中村　仁
誠一 瀧川
Original Assignee
三菱鉛筆株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱鉛筆株式会社 filed Critical 三菱鉛筆株式会社
Publication of WO2017056539A1 publication Critical patent/WO2017056539A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/567—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B29C65/568—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/06—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by welding together bristles made of metal wires or plastic materials
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
    • B29C66/3032—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined
    • B29C66/30321—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of protrusions belonging to at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/69—General aspects of joining filaments 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/60—Riveting or staking
    • B29C65/606—Riveting or staking the rivets being integral with one of the parts to be joined, i.e. staking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/42—Brushes
    • B29L2031/425—Toothbrush

Definitions

  • the present invention relates to a brush and a brush manufacturing method, for example, a flat wire type brush that does not use a flat wire and a brush manufacturing method.
  • the brush there are various brushes such as a hair brush, a body brush, a makeup brush, a shoe brush, and a clothes brush.
  • a hair brush As the brush, there are various brushes such as a hair brush, a body brush, a makeup brush, a shoe brush, and a clothes brush.
  • a body brush As the brush, there are various brushes such as a hair brush, a body brush, a makeup brush, a shoe brush, and a clothes brush.
  • a hair brush As the brush, there are various brushes such as a hair brush, a body brush, a makeup brush, a shoe brush, and a clothes brush.
  • the toothbrush shown by patent document 1 shown in FIG. 13 As a toothbrush, the toothbrush shown by patent document 1 shown in FIG. 13 is proposed. Below, the toothbrush shown by patent document 1 is demonstrated.
  • the toothbrush 11 shown in FIG. 13 folds the bristle bundle 12 into two, inserts the bent portion into a flock hole 13 that is recessed in the surface of the head portion 15 of the toothbrush, and places a flat wire inside the bent portion of the bristle bundle 12.
  • (Metal wire having a rectangular cross section) 14 and both ends of the flat wire 14 are fixed to the surface of the head portion 15 of the toothbrush.
  • the hair bundle 12 is fixed to the head portion 15 by the flat wire 14.
  • the head portion 15 needs to be thick enough to withstand the press-fitting of the flat wire 14, and there is a problem that the head portion 15 becomes large.
  • the head portion 15 is formed of resin and the flat wire 14 is formed of metal, there is a problem that it is difficult to separate the head portion 15 and the flat wire 14 and separate and discard them.
  • the flat wire type toothbrush 20 has a flock hole 22 formed in the head portion 21 and a recess 23 formed on the back surface of the head portion 21, and the flock hole 22 opens into the recess 23.
  • the hair bundle 24 is fixed to the head portion 21 by inserting the hair bundle 24 into the flocking hole 22 and filling the recess 23 with resin 25.
  • the manufacturing method of this flat wire type toothbrush 20 is demonstrated based on FIG. First, the toothbrush main body (head part 21) in which the flock hole 22 and the recessed part 23 are formed in the head part 21 is molded. Then, as shown in FIG. 15A, the head portion 21 is installed on the hair bundle holding jig 30.
  • the hair bundle holding jig 30 includes an installation part 31 of the head part 21 and a hair bundle shaping hole 32 connected to the flocking hole 22 of the head part 21 installed on the installation part 31.
  • the hair bundle is inserted into the hair bundle shaping hole 32 of the hair bundle holding jig 30 from the hair hole 22 of the head part 21 installed on the hair bundle holding jig 30 by a hair bundle planting device (not shown). 24 is planted, and the tip of the hair bundle 24 is pressed against the bottom surface of the hair bundle shaping hole 32 for shaping.
  • the end face of the hair bundle 24 coming out in the concave portion 23 of the head portion 21 is melted by the hair bundle end face melting device 40 to form a lump portion 24a.
  • the toothbrush having the head portion 21 and the bristle bundle holding jig 30 are transported to the molding device 50 by a transport device (not shown) and positioned.
  • a back filler (resin molding material) 60 introduced from the injection port 52 (gate) of the molding die 51 of the molding apparatus 50 is injected into the recess 23.
  • the hair bundle 24 is fixed to the head portion 21.
  • the filler 60 is solidified, the molding die 51 is opened, the toothbrush 20 and the hair bundle holding jig 30 are taken out, and the toothbrush 20 is removed from the hair bundle holding jig 30 as shown in FIG.
  • the toothbrush 20 is completed.
  • the above-described flat wire type toothbrush 20 inserts the hair bundle 24 into the flock hole 22 of the head portion 21 formed in advance, and fills the inside of the recess 23 with the resin 25, whereby the hair bundle 24
  • the toothbrush body including the head portion and handle portion A flat wire type toothbrush that performs fixing simultaneously is also known.
  • a non-flat wire type toothbrush that simultaneously forms the toothbrush body and fixes the head portion of the hair bundle will be described with reference to FIG. Note that the same or corresponding members as those shown in FIGS. 14 and 15 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the hair bundle holding jig 30 includes a toothbrush body part forming part 33 formed of a recess for forming the toothbrush body part, and a hair bundle shaping hole opened in the toothbrush body part forming part 33. 32.
  • the hair bundle 24 is implanted in the hair bundle shaping hole 32 of the hair bundle holding jig 30 by a hair bundle planting device (not shown), and the tip of the hair bundle 24 is inserted into the hair bundle shaping hole 32. Press against the bottom of the hole for shaping.
  • the end surface of the bristle bundle 24 which has come out in the toothbrush main-body part formation part 33 is fuse
  • tool 30 is conveyed to the shaping
  • the resin molding material 60 introduced from the injection port 52 (gate) of the molding die 51 of the molding apparatus 50 is injected into the head portion forming portion 33, and a toothbrush is obtained.
  • the body part (head part and handle part) 26 is formed and the head part 21 of the hair bundle 24 is fixed.
  • the molding die 51 is opened, the toothbrush 20 and the hair bundle holding jig 30 are taken out, and the toothbrush 20 is removed from the hair bundle holding jig 30 as shown in FIG. The toothbrush 20 is completed.
  • a back surface filling material (resin molding material) is formed in a predetermined recess in the head portion by a molding device. Filled with injection pressure. This injection pressure is carried out at a high injection pressure in order to spread the back filler throughout one recess. Therefore, in this conventional flat wire type toothbrush, there is a possibility that the resin filled in the recesses may bleed out to the surface of the head through the hairs of the hair bundle, and the lower end portion of the hair constituting the hair bundle There is a technical problem that the hairs are bonded together by the resin, and the lower ends of the hairs constituting the hair bundle are adhered to the flock holes, and the predetermined flexibility of the hair bundle is lost.
  • the toothbrush body portion head portion and handle portion
  • the head portion of the hair bundle is fixed at the same time.
  • the shape of the flocked hole 22 itself becomes a shape that follows the hair bundle 24, and the gap between the flocked hole 22 and the hair bundle 24 is lost.
  • the lower ends 24A of the hairs constituting the bristle bundle 24 are bonded to each other by a resin formed by the toothbrush main body, and the lower ends 24A of the bristle constituting the bristle bundle 24 are bonded to the flock holes 22 by the resin.
  • the predetermined flexibility of the bundle was lost.
  • any non-flat wire type toothbrush has the lower ends of the hairs constituting the hair bundle bonded to each other by the resin, and the lower ends of the hairs constituting the hair bundle are bonded to the flock holes, The gap between the flock hole and the hair bundle may be lost.
  • the conventional flat wire type toothbrush has a technical problem that the predetermined flexibility of the bristles is lost, the drainage between the hairs is poor, and the usability of the toothbrush is inferior. there were.
  • the present inventor has been made in order to solve the above technical problem, and provides a brush with good usability and a method for manufacturing a brush that can easily drain water and can maintain a predetermined flexibility of a hair bundle. With the goal.
  • the brush according to the present invention made to achieve the above object is a brush in which a hair bundle is implanted in a synthetic resin head portion without using a flat wire, and a plurality of penetrating the front and back surfaces of the head portion.
  • a plurality of hair bundles made of a plurality of synthetic resin fibers and inserted into each of the plurality of planting holes, and a head portion rear surface of each hair bundle inserted into the plurality of planting holes Provided in each of the plurality of planting holes, the lump portion in which the bristles are melted and solidified, the locking portions where the lump portions of the bristles are locked,
  • a plurality of hair bundle fixing portions in a state in which a resin is melted and solidified, covering a back side of the lump portion of the hair bundle locked to the locking portion and closing the planting hole.
  • One hair bundle is fixed to the head part by one hair bundle fixing part.
  • the lump portion of the hair bundle is fixed by the hair bundle fixing portion provided in each of the plurality of planting holes. That is, since one hair bundle is fixed to the head portion by one hair bundle fixing portion, even if the molding resin is temporarily filled into the flock hole, it is filled with a high resin injection pressure as in the past. do not have to. As a result, the filled resin can be prevented from seeping out to the surface of the head through the hairs of the hair bundle, and the adhesion between the lower ends of the hairs and the adhesion between the lower ends of the hairs and the flock holes are suppressed. In addition, it is possible to suppress the shape of the flocking hole itself from following the hair bundle. Therefore, the brush according to the present invention can be a brush with good usability that allows good drainage and maintains the predetermined flexibility of the hair bundle.
  • the hair bundle fixing portion is formed in each of the plurality of planting holes, the thick edge portion of the recess does not exist compared to the case where one recess is formed in the conventional head portion. Therefore, the flock holes can be formed in the vicinity of the outer edge portion of the head portion, and more hair bundles can be formed in the entire head portion, so that a brush with a good feeling of use can be obtained.
  • the hair bundle fixing portion provided in each of the plurality of planting holes may be a hair bundle fixing portion in a state in which a part of the head portion or a closing member separate from the head portion is melted and solidified. desirable. Since this hair bundle fixing part is a part of the head part or a member other than the head part that is melted and solidified, the resin passes between the hairs of the hair bundle as in the case of filling the resin. Adhesion between the lower ends of the hairs and adhesion between the lower ends of the hairs and the flocked holes can be prevented without oozing to the surface of the head, and the shape of the flocked holes themselves is shaped like a hair bundle. Can be prevented.
  • a toothbrush with good usability that drains well and can maintain the predetermined flexibility of the hair bundle.
  • the shape of the flocked hole can be maintained in a desired shape, a gap can be formed between the flocked hole and the hair bundle, and the ratio of the area of the flocked hole to the total area of the hair bundle (occupation of the hair bundle) Rate) can be easily achieved at a desired ratio, and a brush having a desired drainage and a desired bundling flexibility can be obtained.
  • the surface of the hair bundle fixing portion provided in each of the plurality of planting holes protrudes from the back surface of the head portion. That is, the fixed part is formed as a convex part on the back surface of the head part. As described above, the length of the hair bundle held by the head portion (flock hole) is increased while the thickness of the head portion is reduced by being configured so that the surface of the fixed portion protrudes from the back surface of the head portion. Can do.
  • the lump portion of the hair bundle is disposed at a position of 50% or more of the head portion thickness with respect to the surface of the head portion.
  • the head portion is disposed at a position less than 50% of the thickness, the length of the hair bundle held by the head portion (planting hole) is short, and the movable fulcrum of the hair (on the head portion surface side) Since the contact point between the edge of the planting hole and the hair is in the vicinity of the lump-like portion, it is not preferable because the hair is easily removed.
  • the movable fulcrum of the hair is in the vicinity of the lump portion, the amplitude of the hair is increased, which causes a problem that the hair tip is easily opened, which is not preferable.
  • the opening edge of the planting hole on the surface side of the head portion is curved or chamfered.
  • the opening edge of the planting hole on the surface side of the head portion is a vertical corner, the hair tends to be bent by the corner, which is not preferable.
  • the opening edge of the planting hole is curved or chamfered, it is possible to suppress the bending of the hair and to function as a guide when inserting the hair bundle during manufacture.
  • the brush manufacturing method according to the present invention made to achieve the above object is the method for manufacturing a brush, wherein a head portion including a plurality of through-planting holes and the locking portion is formed by resin molding.
  • a head portion including a plurality of through-planting holes and the locking portion is formed by resin molding.
  • the method for manufacturing a brush according to the present invention covers the back side of the lump portion formed by molten resin formed in each of a plurality of planting holes, and the molten resin is solidified to solidify the hair.
  • a step of forming a plurality of hair bundle fixing portions for fixing the bundle to the head portion is provided.
  • one hair bundle is fixed to the head portion by one hair bundle fixing portion, even if the molding resin is filled into the flocked hole, high resin injection as in the past is performed. There is no need to fill with pressure.
  • the hair bundle fixing portion is formed in each of the plurality of planting holes, the thick edge portion of the recess does not exist compared to the case where one recess is formed in the conventional head portion. For this reason, the flock holes can be formed in the vicinity of the outer edge portion of the head portion, and more hair bundles can be formed in the entire head portion, so that a brush with a good feeling of use can be obtained.
  • the hair bundle fixing portion is formed by injecting and filling molten resin into each of the plurality of planting holes, and solidifying the resin, thereby fixing the hair bundle fixing portion. It is desirable that the part is formed.
  • the hair bundle fixing portions are individually provided in each of the plurality of planting holes, it is not necessary to fill with a high resin injection pressure as in a conventional brush, and it is sufficient to fill with a low resin injection pressure. Therefore, it is possible to prevent the filled resin from passing through the hairs of the hair bundle and exuding to the head surface.
  • a step of forming a wall portion around each of the plurality of planting holes on the back side of the head portion so as to surround the planting hole and fixing the hair bundle to the head portion is melted and solidified, and a hair bundle fixing portion that covers the back side of the massive portion is formed in each of the plurality of planting holes on the back side of the head portion.
  • the wall portion formed so as to surround the planting hole on the back side of the head portion is formed, and by melting and solidifying the wall portion, the back side of the massive portion can be easily covered.
  • the hair bundle can be securely fixed to the head portion.
  • the shape of the flocked hole can be maintained in a desired shape, a gap can be formed between the flocked hole and the hair bundle, and the ratio of the area of the flocked hole to the total area of the hair bundle (occupation of the hair bundle) Rate) can be easily achieved at a desired ratio, and a brush having a desired drainage and a desired bundling flexibility can be obtained.
  • the plurality of planting holes on the back side of the head unit are separated from the head unit so as to surround the planting holes on the back side of the head unit. It is desirable to dispose the closing member, melt and solidify the closing member, and form a hair bundle fixing portion that covers the back side of the massive portion in each of the plurality of planting holes on the back side of the head portion. Even in this case, the back side of the lump part can be easily covered, the hair bundle can be reliably fixed to the head part, and the shape of the flock hole can be maintained in a desired shape. It can be set as a brush with a good feeling of use which has the desired drainage and the flexibility of a desired hair bundle.
  • a fixing part that melts and solidifies a part of the head part or the head part in which the planting hole is arranged and melts and solidifies, covers the back side of the lump part, and fixes the hair bundle to the head part.
  • a molding die since a molding die is not required, it can be manufactured at low cost.
  • FIG. 1 is a perspective view showing one embodiment of a toothbrush according to the present invention
  • (a) is a perspective view seen from the back side of the toothbrush
  • (b) is a perspective view seen from the surface side of the toothbrush.
  • FIG. 2 is a cross-sectional view taken along the line II in FIG.
  • FIG. 3 is an enlarged view of the surface side of the planting hole shown in FIG.
  • FIG. 4 is a side view showing the shape of synthetic resin fibers (hairs) used in the hair bundle.
  • FIG. 5 is a process diagram showing a method of manufacturing a toothbrush according to the present invention.
  • FIG. 6 is a process diagram illustrating a method for manufacturing a toothbrush following FIG. 5.
  • FIG. 7 is a process diagram showing in detail the process of FIG. FIG.
  • FIG. 8 is a process diagram showing in detail the process of FIG.
  • FIG. 9 is a diagram showing a first modification and is a process diagram showing the process of FIG. 6B in detail.
  • FIG. 10 is a diagram showing a second modification, and is a process diagram showing the process of FIG. 6B in detail.
  • FIG. 11 is a diagram showing a third modification, and is a process diagram showing the process of FIG. 6B in detail.
  • FIGS. 12A and 12B are diagrams showing a case where the present invention is applied to a hair washing brush, in which FIG. 12A is a side view and FIG. 12B is a perspective view.
  • FIG. 13 is a cross-sectional view showing the structure of one conventional toothbrush.
  • FIG. 14 is a cross-sectional view showing the structure of another conventional toothbrush.
  • FIG. 15 is a process diagram showing another conventional method of manufacturing a toothbrush.
  • FIG. 16 is a process diagram showing another method for manufacturing another conventional toothbrush.
  • FIG. 17 is an enlarged view
  • FIG. 1 is a perspective view showing an embodiment of a toothbrush according to the present invention
  • (a) is a perspective view seen from the back side of the toothbrush
  • (b) is a perspective view seen from the surface side of the toothbrush. is there.
  • FIG. 2 is a cross-sectional view taken along the line II of FIG.
  • FIG. 3 is an enlarged view of the planting hole.
  • reference numeral 1 indicates a toothbrush
  • reference numeral 2 indicates a handle of the toothbrush 1
  • the toothbrush 3 is formed by implanting bristles 5 ⁇ / b> A composed of a plurality of synthetic resin fibers 5 at a plurality of locations of the head portion 4.
  • a lump portion 5B is formed at one end of the hair bundle 5A on the back side of the head portion 2.
  • the lump 5B is formed in a state where the hair bundle 5A is melted and solidified.
  • the head portion 4 is formed with a plurality of planting holes 6 through which the hair bundle 5A is inserted and held.
  • a large-diameter portion 6 b having a larger diameter than the other portion (small-diameter portion) of the planting hole 6 is formed at the upper end portion of the planting hole 6.
  • the large-diameter portion 6 b constitutes a part of the planting hole 6 and communicates with the planting hole 6.
  • the large-diameter portion 6b forms a locking portion 6a which is a so-called step portion at the boundary between the large-diameter portion 6b (bottom surface portion) and the planting hole (small-diameter portion) 6.
  • locking part 6a is comprised so that the said block-shaped part 5B may be latched.
  • the large-diameter portion 6b only needs to have a diameter that can form the locking portion 6a. To increase the diameter more than necessary, the number of planting holes 6 formed in the head portion 2 is reduced. This means less and is not preferable.
  • the planting hole 6 is formed so as to penetrate the front surface 4 a side and the back surface 4 b side of the head portion 4, and the opening on the back side of the planting hole 6 (large diameter portion 6 b) is formed by the hair bundle fixing unit 7.
  • the hair bundle 5A is fixed to the head part 4 by covering.
  • the hair bundle fixing part 7 is in a state where a part of the head part 4 is melted and solidified.
  • the hair bundle fixing portion 7 is formed as a convex portion protruding from the back surface 4 b of the head portion 4.
  • the configuration in which the surface of the hair bundle fixing portion 7 projects from the back surface of the head portion 4 is that the length of the hair bundle 5A held by the planting hole 6 while the thickness of the head portion 4 is reduced. This is to lengthen the length.
  • the massive portion 5B is disposed at a position (dimension t2) of 50% or more of the head portion thickness t1 from the surface 4a of the head portion 4.
  • the thickness of the head portion means the maximum thickness of the head portion.
  • the hair bundle fixing portion 7 When the hair bundle fixing portion 7 is formed as a convex portion protruding from the back surface 4b of the head portion 4, the hair from the surface of the head portion 4 is The dimension to the convex part surface of the bundle fixing
  • the head portion When the head portion is disposed at a position less than 50% of the thickness, the length of the hair bundle held by the head portion 4 (planting hole 6) is short, and the hair movable fulcrum P (head portion) Since the contact point between the edge of the planting hole on the surface side and the hair is in the vicinity of the lump 5B, it is not preferable because the hair is easily removed.
  • the movable fulcrum P of the hair since the movable fulcrum P of the hair is in the vicinity of the lump portion 5B, the amplitude (vibration) of the hair increases, and the hair tip easily opens, which is not preferable.
  • the opening edge 6c of the implantation hole 6 on the surface side of the head portion 4 is curved or chamfered.
  • the opening edge 6c of the planting hole 6 on the surface side of the head portion 4 is a vertical corner, the hair 5 is easily bent by the corner, which is not preferable.
  • the opening edge 6c of the planting hole 6 is curved or chamfered, the bending of the bristles 5 is suppressed and also functions as a guide when inserting the bristles 5A during manufacturing. be able to.
  • the hair bundle fixing portion 7 has an outer shape formed so as to surround the planting hole 6 (large diameter portion 6b) on the back side of the head portion 4. It is formed by melting and solidifying a wall portion 4c having a cylindrical shape or a truncated cone shape (in which a planting hole 6 is formed in the central portion).
  • the hair bundle fixing portion 7 can be easily formed by pressing a heating and melting device such as a heater from above.
  • the wall portion 4c does not need to be formed so as to surround the entire circumference of the planting hole 6, and may surround a part of the planting hole 6. That is, the wall portion 4c only needs to be capable of melting and closing the opening 6b1 of the planting hole 6 (large diameter portion 6b) and fixing the massive portion 5B.
  • the head portion 4 is made of a resin such as polypropylene resin, polyacetal resin, polyoxymethylene resin, etc., and is integrally formed with the handle 2 of the toothbrush 1.
  • the head portion 4 is formed to have a width of 6 to 15 mm, a length of 15 to 35 mm, and a thickness of 2 to 7 mm, for example.
  • the synthetic resin fiber 5 implanted in the head part 4 is formed to have a length of 9 to 14 mm from the surface of the head part 4, for example.
  • the synthetic resin fiber 5 constituting the toothbrush 3 is made of polyamide resin such as 6,6-nylon, 6-nylon, 12-nylon, 6,10-nylon, 6,12-nylon, polyethylene, polypropylene, etc.
  • Polyolefin resins such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and other polyester resins are used.
  • the synthetic resin fiber 5 constituting the toothbrush portion 3 is formed such that the diameter gradually decreases toward the tip, and the tapered surface is tapered at the tip.
  • the taper fiber 5a in which 5a1 was formed and the columnar fiber (non-taper fiber) 5b are included as shown in the enlarged schematic view of FIG. 4B.
  • the taper surface 5a1 length X of the taper fiber 5a is formed in the range of 1 to 5 mm from the tip of the synthetic resin fiber.
  • the taper surface 5a1 length X of the tapered fiber 5a is formed in the range of 1 to 5 mm from the tip of the synthetic resin fiber in consideration of the sweeping effect of the periodontal pocket and the like and the cleaning effect of the tooth surface. Is. As a result, a toothbrush corresponding to a patient suffering from moderate periodontitis can be obtained. That is, when the taper surface 5a1 length X is less than 1 mm, the taper fiber 5a does not penetrate to the deep part of the periodontal pocket, and the back of the pocket becomes insufficiently cleaned.
  • the taper surface 5a1 length X exceeds 5 mm, the hair tip (taper fiber) becomes too thin, it is difficult to sweep out dirt in the periodontal pocket, and the waist (repulsive force against bending) is weak. Since the effect of polishing is also reduced, it is not preferable.
  • a fiber having a diameter of about 0.10 mm to 0.25 mm has an appropriate elasticity and also has an effect of suppressing bending and bending, and is suitably used as a toothbrush of a toothbrush. be able to.
  • the diameter of both the tapered fiber 5a and the non-tapered fiber 5b is preferably 0.15 mm to 0.25 mm.
  • the diameter of the said taper fiber 5a is a diameter of a cylindrical part (part in which the taper surface 5a1 is not formed).
  • the synthetic resin fiber may have an elliptical shape, a star shape, an eyebrow shape, a cross shape, or a polygonal shape in cross section.
  • the number of fibers in one bundle in which the synthetic resin fibers 5 are assembled can be set as appropriate. Usually, 20 to 50 fibers that protrude from one flock hole 6 can be preferably used. it can. Further, the number of fiber bundles 5A (planting holes 6) to be implanted at the tip of the handle 2 of the toothbrush 1 can be set as appropriate, but those normally implanted at 14 to 40 locations are preferred. Can be used.
  • a lump portion 5B formed at one end of the bristle bundle 5A inserted through the planting hole 6 is melted with a part of the head portion 4 without using a flat wire. It is fixed by the hair bundle fixing part 7 in a solidified state. Therefore, unlike the conventional toothbrush, resin is not filled in one concave portion, so that there is no interface between the fixing portion and the head portion for fixing the hair bundle, and the adverse effect that the fixing portion falls off can be prevented. .
  • the toothbrush is formed simultaneously with the formation of the toothbrush body (head portion and handle portion) and the bristles are fixed to the head portion, the lower ends of the hairs are not bonded to each other, Further, the lower end portion of the bristles is not bonded to the toothbrush body portion (head portion). Further, the flocked hole of the toothbrush does not have a shape following the hair bundle as in the conventional toothbrush, and a gap is formed between the lower end portion of the bristles and the toothbrush body portion (head portion). As a result, it is possible to obtain a toothbrush with good usability that drains well and can maintain the predetermined flexibility of the hair bundle.
  • the shape of the flocked hole can be maintained in a desired shape, a gap can be formed between the flocked hole and the hair bundle, and the ratio of the area of the flocked hole to the total area of the hair bundle (of the hair bundle) Occupancy ratio) can be easily achieved at a desired ratio, and a toothbrush having desired drainage and desired bristle bundle flexibility can be obtained.
  • Fig.5 (a) the some penetration hole 6 penetrated and the latching
  • the toothbrush 1 having the head portion 4 is formed by resin molding.
  • a bristle bundle 5 ⁇ / b> A composed of a plurality of synthetic resin fibers 5 is inserted into the planting hole 6.
  • the opening edge (opening 6c) on the surface side of the planting hole 6 is curved or chamfered. Therefore, the opening edge (opening part 6c) on the surface side of the planting hole 6 functions as a guide when inserting the hair bundle 5A, and the hair bundle 5A can be easily inserted into the planting hole 6. it can.
  • the heating and melting device 8 After inserting the hair bundle 5A through the planting hole 6, as shown in FIG. 5C, one end of the hair bundle 5A on the back side of the head part 4 is melted and solidified by the heating and melting device 8.
  • the massive portion 5B is formed.
  • a generally used heating and melting apparatus such as a heater or an impulse welder (IPW) can be used.
  • IPW impulse welder
  • the shape of the lump portion 5B cannot be adjusted because it is heated and melted close to (not in contact with) one end portion of the hair bundle 5A. Therefore, there is a possibility that the block portion 5B cannot be accommodated in the large-diameter portion 6b in the pushing step of the subsequent step.
  • IPW impulse welder
  • the lump part 5B is formed using an impulse welder (IPW) is demonstrated.
  • IPW impulse welder
  • it has a heating chip 8a, and a cavity 8a1 having a predetermined shape is formed in the heating chip 8a.
  • the heating chip 8a is lowered from the state shown in FIG.
  • FIG.7 (b) the one end part of 5 A of hair
  • one end portion of the hair bundle 5A is formed by the cavity 8a, and can be formed into a lump portion 5B having a predetermined shape.
  • the push pin 9 causes the bottom surface of the large-diameter portion 6b.
  • the lump portion 5B is pushed into the formed locking portion 6a, and the lump portion 5B is locked to the locking portion 6a.
  • the method of pushing the block portion 5B with the push pin 9 has been described.
  • the present invention is not limited to this, and a nozzle for injecting air is provided, and the air is injected into the block portion 5B. Then, the block 5B may be pushed in.
  • the hair bundle fixing portion 7 is formed as shown in FIG.
  • An impulse welder (IPW) is used to form the hair bundle fixing portion 7.
  • fixed part 7 is demonstrated based on FIG.
  • the impulse welder (IPW) includes the heating chip 8b, and the heating chip 8b is formed with a cavity 8b1 having a predetermined shape (see FIG. 8A).
  • the heating tip 8b is lowered, the wall 4c is accommodated in the cavity 8a, and is melted by heating.
  • the wall 4c falls in a direction covering the back side of the massive portion 5B, closes the upper opening 6b1 of the large diameter portion 6b, and fixes the massive portion 5B.
  • a fixing portion 7 is formed.
  • the massive portion 5B is embedded and fixed in the head portion 4 when the wall portion 4c is heated and melted and solidified.
  • the head portion 4 teethbrush 1 is completed by raising the heating tip 8b.
  • the bristle bundle fixing part 7 is formed by melting and solidifying a part of the head part 4 (wall part 4c), the fixing part for fixing the bristle bundle like a conventional toothbrush and the head part are formed. There is no interface and the mechanical strength can be increased. Moreover, since the molding die 50 is not required unlike the conventional toothbrush, the head part 4 (toothbrush 1) can be manufactured at low cost. In addition, unlike the conventional toothbrush, the lower ends of the bristles constituting the hair bundle are not bonded to each other, and the lower ends of the bristles are bonded to the toothbrush main body (head portion). Absent.
  • the shape does not follow the hair bundle, A gap is formed between the lower end portion of the bristles and the toothbrush body portion (head portion), and the shape of the flock hole can be maintained.
  • the hair bundle fixing portion 7 of the above embodiment includes a wall portion 4c, which is a part of the head portion, formed so as to surround the planting hole 6 (large diameter portion 6b) on the back side of the head portion 4. It is formed by melting and solidifying.
  • the first modified example is a blocking member that is arranged on the back side of the planting hole (large-diameter portion 6b) (is a separate member from the head portion) and has an outer shape that is cylindrical or frustoconical. It is characterized in that it is formed by melting and solidifying 10A.
  • the closing member 10 ⁇ / b> A is disposed on the back side (large diameter portion 6 b side) of the planting hole 6.
  • the heating tip 8b of the impulse welder (IPW) is lowered, and the closing member 10A is accommodated in the cavity 8a and melted by heating.
  • the closing member 10A falls in a direction to cover the back side of the massive portion 5B, closes the opening 6b1 of the large diameter portion 6b, and fixes the massive portion 5B. 7 is formed. That is, the block portion 5B is embedded and fixed in the head portion 4 when the closing member 10A is heated and melted and solidified.
  • the head portion 4 teethbrush 1 is completed by raising the heating tip 8b.
  • FIG. 10 members that are the same as or correspond to those shown in FIGS. 1 to 8 are given the same reference numerals, and descriptions thereof are omitted.
  • This second modification is formed by melting a closing member 10B which is arranged on the back side of the planting hole (which is a separate member from the head portion) and has an outer shape that is spherical or has an elliptical cross section.
  • FIG. 10B the obstruction
  • occlusion member 10B is arrange
  • the outer shape of the closing member 10B is formed in a spherical shape or an elliptical cross section, a part of the closing member 10B enters the large diameter portion 6b and is temporarily fixed.
  • the heating chip 8b of the impulse welder (IPW) is lowered, the closing member 10B is accommodated in the cavity 8a, heated, melted and solidified to fix the massive portion 5B.
  • a hair bundle fixing part 7 is formed. That is, the block portion 5B is embedded and fixed in the head portion 4 when the closing member 10B is heated and melted and solidified.
  • the head portion 4 teethbrush 1 is completed by raising the heating tip 8b.
  • FIG. 11 the same or corresponding members as those shown in FIGS. 1 to 8 are designated by the same reference numerals, and the description thereof is omitted.
  • This third modification is characterized in that it is formed by melting and solidifying a sheet-like closing member 10C that is disposed on the back side of the planting hole (which is a separate member from the head portion). .
  • the case where the large diameter part 6b is not formed is shown.
  • the closing member 10 ⁇ / b> C is disposed on the back side of the planting hole 6.
  • the closing member 10 ⁇ / b> C is temporarily fixed by being placed on the upper surface (back surface) of the head portion 4.
  • the lump portion 5B is locked to the locking portion 6a with the upper edge portion of the planting hole 6 serving as the locking portion 6a.
  • the heating tip 8b of the impulse welder (IPW) is lowered, the closing member 10C is accommodated in the cavity 8a, heated, melted and solidified to fix the massive portion 5B.
  • a hair bundle fixing part 7 is formed. That is, the block portion 5B is embedded and fixed in the head portion 4 (the back surface of the head portion) when the closing member 10C is heated and melted and solidified.
  • the head part 4 teethbrush 1 is completed by raising the said heating chip
  • fixed part was formed by melt-solidifying a part of head part or the said synthetic resin sealing member different from the said head part.
  • the present invention is not limited to this, and the large-diameter portion 6b may be filled with a back surface filling material (synthetic resin) by a molding apparatus as in the prior art.
  • the back surface filler Synthetic resin
  • the hair bundle fixing part 7 capable of reliably fixing the hair bundle can be formed.
  • brushes such as a hair brush, a body brush, a makeup brush, a shoe brush, and a clothes brush, are applied. be able to.
  • the head portion 4 of the hair washing brush is formed in an annular shape, and a through hole 4A is formed at the center thereof. This through hole 4A is formed for draining water.
  • a hair bundle fixing portion 7 is provided for each of the plurality of planting holes and individually. This hair bundle fixing portion 7 covers the back side of the lump portion of the hair bundle locked to the locking portion and closes the planting hole (large diameter portion), in a state where the resin is melted and solidified. It is.
  • the hair washing brush configured in this way has the effect of good drainage and good usability that can maintain the predetermined flexibility of the hair bundle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

The purpose of the present invention is to provide: a brush for which water drainage is favorable, which can maintain a prescribed degree of suppleness for bristle bundles, and which has a favorable use-sensation; and a brush manufacturing method. Provided is a brush 1 in which bristle bundles 5A are implanted into a synthetic resin head part without using a plate, wherein the brush comprises: a plurality of implant holes 6 which pass through the front surface and the rear surface of the head part; a plurality of bristle bundles 5A which are formed of a plurality of synthetic resin fibers and which are inserted into each of the plurality of implant holes; agglomerate sections 5B which are formed at one end on the head section rear-surface side of each of the bristle bundles that were inserted into the plurality of implant holes, and which are obtained by melting and solidifying the bristle bundles; engagement parts 6a by which the agglomerate sections 5B of the bristle bundles are engaged; and a plurality of bristle bundle fixing sections 7 which are formed by melting and solidifying resin of the head part, which are provided at each of the plurality of implant holes 6, which cover the rear surface side of the agglomerate sections 5B of the bristle bundles 5A engaged by the engagement parts 6a, and which close the implant holes. One of the bristle bundles 5A is fixed in the head section 4 by one of the bristle bundle fixing sections 7.

Description

ブラシ及びブラシの製造方法Brush and brush manufacturing method
　本発明はブラシ及びブラシの製造方法に関し、例えば、平線を用いない無平線タイプのブラシ及びブラシの製造方法に関する。 The present invention relates to a brush and a brush manufacturing method, for example, a flat wire type brush that does not use a flat wire and a brush manufacturing method.
　ブラシとしては、ヘアブラシ、ボディブラシ、メイクブラシ、靴ブラシ、洋服ブラシ等、種々のブラシがある。
　例えば、歯ブラシとしては、図１３に示す特許文献１に示された歯ブラシが提案されている。以下に、特許文献１に示された歯ブラシについて説明する。 As the brush, there are various brushes such as a hair brush, a body brush, a makeup brush, a shoe brush, and a clothes brush.
For example, as a toothbrush, the toothbrush shown by patent document 1 shown in FIG. 13 is proposed. Below, the toothbrush shown by patent document 1 is demonstrated.
　図１３に示す歯ブラシ１１は、毛束１２を二つ折りにして、その折り曲げ部を歯ブラシのヘッド部１５の表面に凹設した植毛穴１３に挿入し、毛束１２の折り曲げ部の内側に平線（断面が矩形形状の金属製線材）１４をわたし、平線１４の両端部を歯ブラシのヘッド部１５表面に固定している。この毛束１２は、前記平線１４によってヘッド部１５に固定される。
　この平線１４を用いる歯ブラシ１１にあっては、ヘッド部１５は平線１４の圧入に耐えるような肉厚が必要となり、ヘッド部１５が大きくなるという問題があった。また、ヘッド部１５は樹脂で形成され、平線１４は金属で形成されるため、ヘッド部１５と平線１４を分離し、分別廃棄するのが難しいという問題があった。 The toothbrush 11 shown in FIG. 13 folds the bristle bundle 12 into two, inserts the bent portion into a flock hole 13 that is recessed in the surface of the head portion 15 of the toothbrush, and places a flat wire inside the bent portion of the bristle bundle 12. (Metal wire having a rectangular cross section) 14 and both ends of the flat wire 14 are fixed to the surface of the head portion 15 of the toothbrush. The hair bundle 12 is fixed to the head portion 15 by the flat wire 14.
In the toothbrush 11 using the flat wire 14, the head portion 15 needs to be thick enough to withstand the press-fitting of the flat wire 14, and there is a problem that the head portion 15 becomes large. Further, since the head portion 15 is formed of resin and the flat wire 14 is formed of metal, there is a problem that it is difficult to separate the head portion 15 and the flat wire 14 and separate and discard them.
　そこで、前記平線１４を用いた歯ブラシ１１の問題を解決するものとして、例えば、特許文献２に示すような平線を用いない無平線タイプの歯ブラシが提案されている。
　平線を用いない無平線タイプの歯ブラシについて、図１４に基づいて説明する。
　この無平線タイプの歯ブラシ２０は、ヘッド部２１に植毛穴２２が形成されると共に、ヘッド部２１の背面に凹部２３が形成され、前記植毛穴２２は前記凹部２３内に開口している。そして、前記植毛穴２２に毛束２４を挿入し、前記凹部内２３に樹脂２５を充填することにより、前記毛束２４をヘッド部２１に固定している。 Therefore, as a means for solving the problem of the toothbrush 11 using the flat wire 14, for example, a flat wire type toothbrush that does not use a flat wire as shown in Patent Document 2 has been proposed.
A flat wire type toothbrush that does not use a flat wire will be described with reference to FIG.
The flat wire type toothbrush 20 has a flock hole 22 formed in the head portion 21 and a recess 23 formed on the back surface of the head portion 21, and the flock hole 22 opens into the recess 23. The hair bundle 24 is fixed to the head portion 21 by inserting the hair bundle 24 into the flocking hole 22 and filling the recess 23 with resin 25.
　更に、この無平線タイプの歯ブラシ２０の製造方法について、図１５に基づいて説明する。まず、ヘッド部２１に植毛穴２２と凹部２３が形成された歯ブラシ本体（ヘッド部２１）を成形する。
　そして、図１５（ａ）に示すように、毛束保持治具３０にヘッド部２１を据付ける。この毛束保持治具３０は、ヘッド部２１の据付部３１と、据付部３１に据付けられるヘッド部２１の植毛穴２２に連なる毛束整形孔３２を備えている。 Furthermore, the manufacturing method of this flat wire type toothbrush 20 is demonstrated based on FIG. First, the toothbrush main body (head part 21) in which the flock hole 22 and the recessed part 23 are formed in the head part 21 is molded.
Then, as shown in FIG. 15A, the head portion 21 is installed on the hair bundle holding jig 30. The hair bundle holding jig 30 includes an installation part 31 of the head part 21 and a hair bundle shaping hole 32 connected to the flocking hole 22 of the head part 21 installed on the installation part 31.
　次に、毛束植設装置（図示せず）により、毛束保持治具３０に据付けられているヘッド部２１の植毛穴２２から毛束保持治具３０の毛束整形孔３２に、毛束２４を植設し、毛束２４の先端部を毛束整形孔３２の孔底面に押し当て整形する。 Next, the hair bundle is inserted into the hair bundle shaping hole 32 of the hair bundle holding jig 30 from the hair hole 22 of the head part 21 installed on the hair bundle holding jig 30 by a hair bundle planting device (not shown). 24 is planted, and the tip of the hair bundle 24 is pressed against the bottom surface of the hair bundle shaping hole 32 for shaping.
　更に、毛束端面溶融装置４０により、図１５（ｂ）に示すように、ヘッド部２１の凹部２３内に出ている毛束２４の端面を溶融し、塊状部２４ａを形成する。
　続いて、図１５（ｃ）に示すように、前記ヘッド部２１を有する歯ブラシと毛束保持治具３０を、搬送装置（図示せず）によって、成形装置５０に搬送し、位置決めする。
　その後、図１５（ｄ）に示すように、成形装置５０の成形金型５１の注入口５２（ゲート）から導入される背面充填材（樹脂成形材）６０を、前記凹部２３内に注入して、ヘッド部２１に毛束２４を固定する。
　前記充填材６０の固化後、成形金型５１を開いて歯ブラシ２０及び毛束保持治具３０を取出し、歯ブラシ２０を毛束保持治具３０から外すことにより、図１５（ｅ）に示すような、歯ブラシ２０が完成する。 Furthermore, as shown in FIG. 15 (b), the end face of the hair bundle 24 coming out in the concave portion 23 of the head portion 21 is melted by the hair bundle end face melting device 40 to form a lump portion 24a.
Subsequently, as shown in FIG. 15C, the toothbrush having the head portion 21 and the bristle bundle holding jig 30 are transported to the molding device 50 by a transport device (not shown) and positioned.
Thereafter, as shown in FIG. 15 (d), a back filler (resin molding material) 60 introduced from the injection port 52 (gate) of the molding die 51 of the molding apparatus 50 is injected into the recess 23. The hair bundle 24 is fixed to the head portion 21.
After the filler 60 is solidified, the molding die 51 is opened, the toothbrush 20 and the hair bundle holding jig 30 are taken out, and the toothbrush 20 is removed from the hair bundle holding jig 30 as shown in FIG. The toothbrush 20 is completed.
　ところで、前記した無平線タイプの歯ブラシ２０は、予め形成されたヘッド部２１の植毛穴２２に、毛束２４を挿入し、前記凹部内２３に樹脂２５を充填することにより、前記毛束２４をヘッド部２１に固定したものであるが、その他に、歯ブラシのヘッド部と柄部（以下、ヘッド部と柄部を含めて歯ブラシ本体という）を形成する際に、毛束のヘッド部への固定を同時に行う、無平線タイプの歯ブラシも知られている。
　この歯ブラシ本体の形成と毛束のヘッド部の固定を同時に行う、無平線タイプの歯ブラシについて、図１６に基づいて説明する。尚、図１４、図１５に示した部材と同一あるいは相当する部材は、同一符号を付して、その詳細な説明は省略する。 By the way, the above-described flat wire type toothbrush 20 inserts the hair bundle 24 into the flock hole 22 of the head portion 21 formed in advance, and fills the inside of the recess 23 with the resin 25, whereby the hair bundle 24 In addition to this, when forming the head portion and handle portion of the toothbrush (hereinafter referred to as the toothbrush body including the head portion and handle portion) of the toothbrush, A flat wire type toothbrush that performs fixing simultaneously is also known.
A non-flat wire type toothbrush that simultaneously forms the toothbrush body and fixes the head portion of the hair bundle will be described with reference to FIG. Note that the same or corresponding members as those shown in FIGS. 14 and 15 are denoted by the same reference numerals, and detailed description thereof is omitted.
　図１６（ａ）に示すように、毛束保持治具３０は、歯ブラシ本体部を形成するための凹部からなる歯ブラシ本体部形成部３３と、歯ブラシ本体部形成部３３に開口する毛束整形孔３２を備えている。
　そして、この毛束保持治具３０の毛束整形孔３２に、毛束植設装置（図示せず）により、毛束２４を植設し、毛束２４の先端部を毛束整形孔３２の孔底面に押し当て整形する。
　その後、毛束端面溶融装置４０により、図１５（ｂ）に示すように、歯ブラシ本体部形成部３３内に出ている毛束２４の端面を溶融し、塊状部２４ａを形成する。 As shown in FIG. 16A, the hair bundle holding jig 30 includes a toothbrush body part forming part 33 formed of a recess for forming the toothbrush body part, and a hair bundle shaping hole opened in the toothbrush body part forming part 33. 32.
Then, the hair bundle 24 is implanted in the hair bundle shaping hole 32 of the hair bundle holding jig 30 by a hair bundle planting device (not shown), and the tip of the hair bundle 24 is inserted into the hair bundle shaping hole 32. Press against the bottom of the hole for shaping.
Then, as shown in FIG.15 (b), the end surface of the bristle bundle 24 which has come out in the toothbrush main-body part formation part 33 is fuse | melted with the bristle bundle end surface melting apparatus 40, and the lump part 24a is formed.
　続いて、図１５（ｃ）に示すように、毛束保持治具３０を、搬送装置（図示せず）によって、成形装置５０に搬送し、位置決めする。
　その後、図１５（ｄ）に示すように、成形装置５０の成形金型５１の注入口５２（ゲート）から導入される樹脂成形材６０を、前記ヘッド部形成部３３内に注入して、歯ブラシ本体部（ヘッド部と柄部）２６の形成と、毛束２４のヘッド部２１の固定を行う。
　前記成形材６０の固化後、成形金型５１を開いて歯ブラシ２０及び毛束保持治具３０を取出し、歯ブラシ２０を毛束保持治具３０から外すことにより、図１５（ｅ）に示すような、歯ブラシ２０が完成する。 Then, as shown in FIG.15 (c), the hair | bristle bundle holding | maintenance jig | tool 30 is conveyed to the shaping | molding apparatus 50 with a conveying apparatus (not shown), and is positioned.
Thereafter, as shown in FIG. 15 (d), the resin molding material 60 introduced from the injection port 52 (gate) of the molding die 51 of the molding apparatus 50 is injected into the head portion forming portion 33, and a toothbrush is obtained. The body part (head part and handle part) 26 is formed and the head part 21 of the hair bundle 24 is fixed.
After the molding material 60 is solidified, the molding die 51 is opened, the toothbrush 20 and the hair bundle holding jig 30 are taken out, and the toothbrush 20 is removed from the hair bundle holding jig 30 as shown in FIG. The toothbrush 20 is completed.
特開平１１－５６４７８公報JP-A-11-56478 特開２００３－２３５６４８公報JP 2003-235648 A
　ところで、図１４、図１５に示した従来の無平線タイプの歯ブラシにあっては、成形装置によって背面充填材（樹脂成形材）が、前記ヘッド部に形成された一つの凹部内に所定の注入圧で充填される。この注入圧は、一つの凹部全体に背面充填材を行き渡らせるために、高い注入圧で行われる。
　そのため、この従来の無平線タイプの歯ブラシでは、凹部内に充填された樹脂が毛束の毛の間を通ってヘッドの表面に滲み出る虞もあり、また毛束を構成する毛の下端部同士が前記樹脂によって接着され、また毛束を構成する毛の下端部が植毛穴に接着され、毛束の所定のしなやかさが失われるという技術的課題があった。 By the way, in the conventional flat wire type toothbrush shown in FIGS. 14 and 15, a back surface filling material (resin molding material) is formed in a predetermined recess in the head portion by a molding device. Filled with injection pressure. This injection pressure is carried out at a high injection pressure in order to spread the back filler throughout one recess.
Therefore, in this conventional flat wire type toothbrush, there is a possibility that the resin filled in the recesses may bleed out to the surface of the head through the hairs of the hair bundle, and the lower end portion of the hair constituting the hair bundle There is a technical problem that the hairs are bonded together by the resin, and the lower ends of the hairs constituting the hair bundle are adhered to the flock holes, and the predetermined flexibility of the hair bundle is lost.
　また、ヘッド部に形成された凹部側壁には前記注入圧が作用するため、肉厚な縁部Ｆ（ヘッド部２１の側面と凹部２３の内面との間の厚さ、図１４参照）を形成する必要があり、植毛穴を歯ブラシ本体（ヘッド部）の外縁部近傍に形成することができかった。即ち、歯ブラシ本体（ヘッド部）全体に毛束を形成できず、良好な使用感が得られないという技術的課題があった。 Further, since the injection pressure acts on the side wall of the concave portion formed in the head portion, a thick edge F (thickness between the side surface of the head portion 21 and the inner surface of the concave portion 23, see FIG. 14) is formed. Therefore, the flock hole could not be formed in the vicinity of the outer edge portion of the toothbrush body (head portion). That is, there is a technical problem that a hair bundle cannot be formed on the entire toothbrush body (head portion), and a good feeling of use cannot be obtained.
　また、図１６に示した従来の無平線タイプの歯ブラシにあっては、歯ブラシ本体部（ヘッド部と柄部）の成形と、毛束のヘッド部の固定が同時に行われる。
　この無平線タイプの歯ブラシにおいては、図１７に示すように、植毛穴２２自体の形状が毛束２４に倣った形状になり、植毛穴２２と毛束２４との間の隙間が失われるという技術的課題があった。また、毛束２４を構成する毛の下端部２４Ａ同士が歯ブラシ本体部の形成する樹脂によって接着され、また毛束２４を構成する毛の下端部２４Ａが前記樹脂によって植毛穴２２に接着され、毛束の所定のしなやかさが失われるという技術的課題があった。 Further, in the conventional flat wire type toothbrush shown in FIG. 16, the toothbrush body portion (head portion and handle portion) is formed and the head portion of the hair bundle is fixed at the same time.
In this flat wire type toothbrush, as shown in FIG. 17, the shape of the flocked hole 22 itself becomes a shape that follows the hair bundle 24, and the gap between the flocked hole 22 and the hair bundle 24 is lost. There were technical challenges. Further, the lower ends 24A of the hairs constituting the bristle bundle 24 are bonded to each other by a resin formed by the toothbrush main body, and the lower ends 24A of the bristle constituting the bristle bundle 24 are bonded to the flock holes 22 by the resin. There was a technical problem that the predetermined flexibility of the bundle was lost.
　上記したように、いずれの無平線タイプの歯ブラシも、毛束を構成する毛の下端部同士が樹脂によって接着され、また毛束を構成する毛の下端部が植毛穴に接着され、更には、植毛穴と毛束の間の隙間が失われる場合がある。
　その結果、従来の無平線タイプの歯ブラシにあっては、毛束の所定のしなやかさが失われ、また毛間の水抜けが悪く、歯ブラシの使用感が劣るという技術的課題を有するものであった。 As described above, any non-flat wire type toothbrush has the lower ends of the hairs constituting the hair bundle bonded to each other by the resin, and the lower ends of the hairs constituting the hair bundle are bonded to the flock holes, The gap between the flock hole and the hair bundle may be lost.
As a result, the conventional flat wire type toothbrush has a technical problem that the predetermined flexibility of the bristles is lost, the drainage between the hairs is poor, and the usability of the toothbrush is inferior. there were.
　本発明者は、上記技術的課題を解決するためになされたものであり、水抜けが良く、また毛束の所定のしなやかさを維持できる使用感の良いブラシ及びブラシの製造方法を提供することを目的とする。 The present inventor has been made in order to solve the above technical problem, and provides a brush with good usability and a method for manufacturing a brush that can easily drain water and can maintain a predetermined flexibility of a hair bundle. With the goal.
　上記目的を達成するためになされた本発明にかかるブラシは、平線を用いることなく、毛束を合成樹脂製のヘッド部に植設したブラシにおいて、前記ヘッド部の表面と背面を貫通した複数の植設穴と、複数の合成樹脂製繊維からなり、前記複数の植設穴の夫々に挿通される複数の毛束と、前記複数の植設穴に挿通した夫々の毛束のヘッド部背面側の一端部に形成された、前記毛束が溶融固化した状態の塊状部と、前記毛束の塊状部が係止される係止部と、前記複数の植設穴の夫々に設けられた、前記係止部に係止された毛束の塊状部の背面側を覆い、かつ前記植設穴を閉塞する、樹脂を溶融固化した状態の複数の毛束固定部と、を備え、前記一つの毛束が一つの毛束固定部によって、前記ヘッド部に固定されていることを特徴としている。 The brush according to the present invention made to achieve the above object is a brush in which a hair bundle is implanted in a synthetic resin head portion without using a flat wire, and a plurality of penetrating the front and back surfaces of the head portion. A plurality of hair bundles made of a plurality of synthetic resin fibers and inserted into each of the plurality of planting holes, and a head portion rear surface of each hair bundle inserted into the plurality of planting holes Provided in each of the plurality of planting holes, the lump portion in which the bristles are melted and solidified, the locking portions where the lump portions of the bristles are locked, A plurality of hair bundle fixing portions in a state in which a resin is melted and solidified, covering a back side of the lump portion of the hair bundle locked to the locking portion and closing the planting hole. One hair bundle is fixed to the head part by one hair bundle fixing part.
　このように、本発明にかかるブラシにあっては、複数の植設穴の夫々に設けられた、毛束固定部によって、毛束の塊状部が固定されている。
　即ち、一つの毛束が一つの毛束固定部によって、前記ヘッド部に固定されているため、仮に植毛穴に成形樹脂を充填する場合であっても、従来のような高い樹脂注入圧で充填する必要はない。
　その結果、充填された樹脂が毛束の毛の間を通ってヘッドの表面へ滲み出すのを抑制でき、また毛の下端部同士の接着及び前記毛の下端部と植毛穴との接着を抑制でき、更に植毛穴自体の形状が毛束に倣った形状になるのを抑制できる。
　したがって、本発明にかかるブラシは、水抜けが良く、また毛束の所定のしなやかさを維持できる使用感の良いブラシとすることができる。 Thus, in the brush according to the present invention, the lump portion of the hair bundle is fixed by the hair bundle fixing portion provided in each of the plurality of planting holes.
That is, since one hair bundle is fixed to the head portion by one hair bundle fixing portion, even if the molding resin is temporarily filled into the flock hole, it is filled with a high resin injection pressure as in the past. do not have to.
As a result, the filled resin can be prevented from seeping out to the surface of the head through the hairs of the hair bundle, and the adhesion between the lower ends of the hairs and the adhesion between the lower ends of the hairs and the flock holes are suppressed. In addition, it is possible to suppress the shape of the flocking hole itself from following the hair bundle.
Therefore, the brush according to the present invention can be a brush with good usability that allows good drainage and maintains the predetermined flexibility of the hair bundle.
　また、複数の植設穴の夫々に毛束固定部が形成されるため、従来のようなヘッド部に一つの凹部が形成されている場合に比べて、凹部の肉厚な縁部が存在しないために、植毛穴をヘッド部の外縁部近傍に形成することができ、ヘッド部全体により多くの毛束を形成することができ、使用感の良いブラシを得ることができる。 In addition, since the hair bundle fixing portion is formed in each of the plurality of planting holes, the thick edge portion of the recess does not exist compared to the case where one recess is formed in the conventional head portion. Therefore, the flock holes can be formed in the vicinity of the outer edge portion of the head portion, and more hair bundles can be formed in the entire head portion, so that a brush with a good feeling of use can be obtained.
　ここで、前記複数の植設穴の夫々に設けられた毛束固定部が、前記ヘッド部の一部あるいは前記ヘッド部と別の閉塞部材が溶融固化した状態の毛束固定部であることが望ましい。
　この毛束固定部は、前記ヘッド部の一部あるいは前記ヘッド部と別の閉塞部材が溶融固化したものであるため、樹脂を充填する場合のように樹脂が毛束の毛の間を通ってヘッドの表面に滲み出ることもなく、毛の下端部同士の接着及び前記毛の下端部と植毛穴との接着を防止することができ、また植毛穴自体の形状が毛束に倣った形状になるのを防止することができる。
　その結果、水抜けが良く、また毛束の所定のしなやかさを維持できる使用感の良い歯ブラシを得ることができる。
　特に、植毛穴の形状を所望の形状に維持することができるため、植毛穴と毛束との間に隙間を形成できると共に、植毛穴の面積と毛束の総面積の割合（毛束の占有率）を、所望の割合に容易になすことができ、所望の水抜け、所望の毛束のしなやかさを有するブラシを得ることができる。 Here, the hair bundle fixing portion provided in each of the plurality of planting holes may be a hair bundle fixing portion in a state in which a part of the head portion or a closing member separate from the head portion is melted and solidified. desirable.
Since this hair bundle fixing part is a part of the head part or a member other than the head part that is melted and solidified, the resin passes between the hairs of the hair bundle as in the case of filling the resin. Adhesion between the lower ends of the hairs and adhesion between the lower ends of the hairs and the flocked holes can be prevented without oozing to the surface of the head, and the shape of the flocked holes themselves is shaped like a hair bundle. Can be prevented.
As a result, it is possible to obtain a toothbrush with good usability that drains well and can maintain the predetermined flexibility of the hair bundle.
In particular, since the shape of the flocked hole can be maintained in a desired shape, a gap can be formed between the flocked hole and the hair bundle, and the ratio of the area of the flocked hole to the total area of the hair bundle (occupation of the hair bundle) Rate) can be easily achieved at a desired ratio, and a brush having a desired drainage and a desired bundling flexibility can be obtained.
　また、前記複数の植設穴の夫々に設けられた毛束固定部の表面が、ヘッド部背面から突出していることが望ましい。即ち、固定部がヘッド部背面において凸部として形成されている。
　このように、固定部の表面がヘッド部背面から突出するように構成されることにより、ヘッド部の厚さを薄くしつつ、ヘッド部（植毛穴）による毛束の保持長さを長くすることができる。 Further, it is desirable that the surface of the hair bundle fixing portion provided in each of the plurality of planting holes protrudes from the back surface of the head portion. That is, the fixed part is formed as a convex part on the back surface of the head part.
As described above, the length of the hair bundle held by the head portion (flock hole) is increased while the thickness of the head portion is reduced by being configured so that the surface of the fixed portion protrudes from the back surface of the head portion. Can do.
　更に、前記毛束の塊状部が、前記ヘッド部の表面を基準として、前記ヘッド部厚さの５０％以上の位置に配置されていることが望ましい。
　尚、前記ヘッド部厚さの５０％未満の位置に配置されている場合には、ヘッド部（植設穴）による毛束の保持長さが短く、また毛の可動支点（ヘッド部表面側の植設穴の縁部と毛の接触点）が前記塊状部の近傍になるため、毛が抜け易いという弊害が生じるため、好ましくない。また、毛の可動支点が前記塊状部の近傍になるため、毛の振幅が大きくなるため、毛先が開き易くなるという弊害が生じるため、好ましくない。 Furthermore, it is desirable that the lump portion of the hair bundle is disposed at a position of 50% or more of the head portion thickness with respect to the surface of the head portion.
When the head portion is disposed at a position less than 50% of the thickness, the length of the hair bundle held by the head portion (planting hole) is short, and the movable fulcrum of the hair (on the head portion surface side) Since the contact point between the edge of the planting hole and the hair is in the vicinity of the lump-like portion, it is not preferable because the hair is easily removed. In addition, since the movable fulcrum of the hair is in the vicinity of the lump portion, the amplitude of the hair is increased, which causes a problem that the hair tip is easily opened, which is not preferable.
　また、前記ヘッド部の表面側の植設穴の開口縁が、曲面形状あるいは面取りされていることが望ましい。
　前記ヘッド部の表面側の植設穴の開口縁が垂直な角部である場合には、前記角部により毛が折れ曲がり易くなり、好ましくない。これに対して、植設穴の開口縁が曲面形状あるいは面取りされている場合には、毛の折れ曲がりが抑制されると共に、製造時に毛束を挿入する際のガイドとしての機能させることができる。 Moreover, it is desirable that the opening edge of the planting hole on the surface side of the head portion is curved or chamfered.
When the opening edge of the planting hole on the surface side of the head portion is a vertical corner, the hair tends to be bent by the corner, which is not preferable. On the other hand, when the opening edge of the planting hole is curved or chamfered, it is possible to suppress the bending of the hair and to function as a guide when inserting the hair bundle during manufacture.
　上記目的を達成するためになされた本発明にかかるブラシの製造方法は、上記ブラシの製造方法において、複数の貫通した植設穴と、前記係止部とを備えるヘッド部を樹脂成形により形成する工程と、前記ヘッド部形成工程の後、複数の合成樹脂製繊維からなる毛束を、前記植設穴に挿通する工程と、前記植設穴に毛束を挿通する工程の後、ヘッド部の背面側における毛束の一端部を、溶融固化し、塊状部を形成する工程と、前記塊状部の形成工程の後、前記塊状部を前記係止部に係止する工程と、前記複数の植設穴の夫々に形成され、かつ溶融した樹脂により前記塊状部の背面側を覆い、前記溶融した樹脂が固化することにより前記毛束を前記ヘッド部に固定する、複数の毛束固定部を形成する工程と、を備え、前記毛束固定部を形成する工程では、前記一つの毛束が一つの毛束固定部によって、前記ヘッド部に固定されることを特徴としている。 The brush manufacturing method according to the present invention made to achieve the above object is the method for manufacturing a brush, wherein a head portion including a plurality of through-planting holes and the locking portion is formed by resin molding. After the step and the head portion forming step, after the step of inserting a hair bundle made of a plurality of synthetic resin fibers into the planting hole and the step of inserting the hair bundle into the planting hole, One end part of the hair bundle on the back side is melted and solidified to form a lump part, and after the lump part forming process, the lump part is locked to the locking part, and the plurality of planting parts A plurality of hair bundle fixing portions are formed, which are formed in each of the holes and cover the back side of the lump portion with molten resin, and the molten resin solidifies to fix the hair bundle to the head portion. And forming the hair bundle fixing part. In step, the one tuft is by one tuft fixed portion, and characterized in that it is fixed to the head portion.
　このように、本発明にかかるブラシの製造方法は、複数の植設穴の夫々に形成され、かつ溶融した樹脂により前記塊状部の背面側を覆い、前記溶融した樹脂が固化することにより前記毛束を前記ヘッド部に固定する、複数の毛束固定部を形成する工程を備えている。そして、一つの毛束が一つの毛束固定部によって、前記ヘッド部に固定されるようになされるため、仮に植毛穴に成形樹脂を充填する場合であっても、従来のような高い樹脂注入圧で充填する必要はない。
　その結果、充填された樹脂が毛束の毛の間を通ってヘッド表面へ滲み出すのを抑制でき、また毛の下端部同士の接着及び前記毛の下端部と植毛穴との接着を抑制でき、更に植毛穴自体の形状が毛束に倣った形状になるのを抑制できる。
　したがって、本発明にかかるブラシにあっては、水抜けが良く、また毛束の所定のしなやかさを維持できる使用感の良いものとすることができる。 As described above, the method for manufacturing a brush according to the present invention covers the back side of the lump portion formed by molten resin formed in each of a plurality of planting holes, and the molten resin is solidified to solidify the hair. A step of forming a plurality of hair bundle fixing portions for fixing the bundle to the head portion is provided. In addition, since one hair bundle is fixed to the head portion by one hair bundle fixing portion, even if the molding resin is filled into the flocked hole, high resin injection as in the past is performed. There is no need to fill with pressure.
As a result, it is possible to suppress the filled resin from seeping out to the head surface through the hairs of the hair bundle, and to suppress the adhesion between the lower ends of the hairs and the adhesion between the lower ends of the hairs and the flock holes. Furthermore, it can suppress that the shape of the flock hole itself becomes a shape that follows the hair bundle.
Therefore, in the brush according to the present invention, drainage is good, and the usability can be improved so that the predetermined flexibility of the hair bundle can be maintained.
　また、複数の植設穴の夫々に毛束固定部が形成されるため、従来のようなヘッド部に一つの凹部が形成されている場合に比べて、凹部の肉厚な縁部が存在しないために、植毛穴をヘッド部の外縁部近傍に形成することができ、ヘッド部全体により多くの毛束を形成することができ、使用感の良いブラシとすることができる。 In addition, since the hair bundle fixing portion is formed in each of the plurality of planting holes, the thick edge portion of the recess does not exist compared to the case where one recess is formed in the conventional head portion. For this reason, the flock holes can be formed in the vicinity of the outer edge portion of the head portion, and more hair bundles can be formed in the entire head portion, so that a brush with a good feeling of use can be obtained.
　ここで、毛束固定部を形成する工程において、前記毛束固定部は、前記複数の植設穴の夫々に、溶融した樹脂が注入充填され、前記樹脂が固化することにより、前記毛束固定部が形成されることが望ましい。
　このように、複数の植設穴の夫々に、個別に毛束固定部が設けられるため、従来のブラシのように高い樹脂注入圧で充填する必要はなく、低い樹脂注入圧で十分充填することができるため、充填された樹脂が毛束の毛の間を通って、ヘッド表面へ滲み出すのを抑制することができる。 Here, in the step of forming the hair bundle fixing portion, the hair bundle fixing portion is formed by injecting and filling molten resin into each of the plurality of planting holes, and solidifying the resin, thereby fixing the hair bundle fixing portion. It is desirable that the part is formed.
As described above, since the hair bundle fixing portions are individually provided in each of the plurality of planting holes, it is not necessary to fill with a high resin injection pressure as in a conventional brush, and it is sufficient to fill with a low resin injection pressure. Therefore, it is possible to prevent the filled resin from passing through the hairs of the hair bundle and exuding to the head surface.
　また、前記ヘッド部形成工程において、前記ヘッド部の背面側の複数の植設穴の夫々に、植設穴の周囲を囲うように壁部を形成し、前記毛束をヘッド部に固定する工程において、前記壁部を溶融固化し、前記ヘッド部の背面側の複数の植設穴の夫々に、前記塊状部の背面側を覆う毛束固定部を形成することが望ましい。
　このように、ヘッド部の背面側の植設穴の周囲を囲うように形成された壁部を形成し、この壁部を溶融固化することにより、容易に塊状部の背面側を覆うことができ、前記毛束を前記ヘッド部に確実に固定することができる。
　特に、植毛穴の形状を所望の形状に維持することができるため、植毛穴と毛束との間に隙間を形成できると共に、植毛穴の面積と毛束の総面積の割合（毛束の占有率）を、所望の割合に容易になすことができ、所望の水抜け、所望の毛束のしなやかさを有するブラシを得ることができる。 Further, in the head portion forming step, a step of forming a wall portion around each of the plurality of planting holes on the back side of the head portion so as to surround the planting hole and fixing the hair bundle to the head portion. Preferably, the wall portion is melted and solidified, and a hair bundle fixing portion that covers the back side of the massive portion is formed in each of the plurality of planting holes on the back side of the head portion.
In this way, the wall portion formed so as to surround the planting hole on the back side of the head portion is formed, and by melting and solidifying the wall portion, the back side of the massive portion can be easily covered. The hair bundle can be securely fixed to the head portion.
In particular, since the shape of the flocked hole can be maintained in a desired shape, a gap can be formed between the flocked hole and the hair bundle, and the ratio of the area of the flocked hole to the total area of the hair bundle (occupation of the hair bundle) Rate) can be easily achieved at a desired ratio, and a brush having a desired drainage and a desired bundling flexibility can be obtained.
　また、前記毛束をヘッド部に固定する工程において、前記ヘッド部の背面側の複数の植設穴の夫々に、前記ヘッド部の背面側の植設穴の周囲を囲うようにヘッド部と別の閉塞部材を配置し、前記閉塞部材を溶融固化し、前記ヘッド部の背面側の複数の植設穴の夫々に、前記塊状部の背面側を覆う毛束固定部を形成することが望ましい。
　この場合においても、容易に塊状部の背面側を覆うことができ、前記毛束を前記ヘッド部に確実に固定することができ、植毛穴の形状を所望の形状に維持することができるため、所望の水抜け、所望の毛束のしなやかさを有する使用感の良いブラシとすることができる。 Further, in the step of fixing the hair bundle to the head unit, the plurality of planting holes on the back side of the head unit are separated from the head unit so as to surround the planting holes on the back side of the head unit. It is desirable to dispose the closing member, melt and solidify the closing member, and form a hair bundle fixing portion that covers the back side of the massive portion in each of the plurality of planting holes on the back side of the head portion.
Even in this case, the back side of the lump part can be easily covered, the hair bundle can be reliably fixed to the head part, and the shape of the flock hole can be maintained in a desired shape. It can be set as a brush with a good feeling of use which has the desired drainage and the flexibility of a desired hair bundle.
　尚、ヘッド部の一部、あるいは植設穴が配置されたヘッド部と別の閉塞部材を溶融固化し、前記塊状部の背面側を覆い、前記毛束を前記ヘッド部に固定する固定部を形成する場合には、成形金型を必要としないため、安価に製造することができる。 In addition, a fixing part that melts and solidifies a part of the head part or the head part in which the planting hole is arranged and melts and solidifies, covers the back side of the lump part, and fixes the hair bundle to the head part. In the case of forming, since a molding die is not required, it can be manufactured at low cost.
　本発明によれば、水抜けが良く、また毛束の所定のしなやかさを維持できる使用感の良いブラシ及びブラシの製造方法を得ることができる。 According to the present invention, it is possible to obtain a brush with a good feeling of use and a method of manufacturing a brush that can drain water well and maintain a predetermined flexibility of the hair bundle.
図１は、本発明にかかる歯ブラシの一実施形態を示す斜視図であり、（ａ）は歯ブラシの背面側からみた斜視図であり、（ｂ）は歯ブラシの表面側からみた斜視図である。FIG. 1 is a perspective view showing one embodiment of a toothbrush according to the present invention, (a) is a perspective view seen from the back side of the toothbrush, and (b) is a perspective view seen from the surface side of the toothbrush. 図２は、図１（ａ）のＩ－Ｉ断面図である。FIG. 2 is a cross-sectional view taken along the line II in FIG. 図３は、図１に示した植設穴の表面側の拡大図である。FIG. 3 is an enlarged view of the surface side of the planting hole shown in FIG. 図４は、毛束に用いられている合成樹脂製繊維（毛）の形状を示す側面図である。FIG. 4 is a side view showing the shape of synthetic resin fibers (hairs) used in the hair bundle. 図５は、本発明にかかる歯ブラシの製造方法を示す工程図である。FIG. 5 is a process diagram showing a method of manufacturing a toothbrush according to the present invention. 図６は、図５に続く歯ブラシの製造方法を示す工程図である。FIG. 6 is a process diagram illustrating a method for manufacturing a toothbrush following FIG. 5. 図７は、図５（ｃ）の工程を詳細に示した工程図である。FIG. 7 is a process diagram showing in detail the process of FIG. 図８は、図６（ｂ）の工程を詳細に示した工程図である。FIG. 8 is a process diagram showing in detail the process of FIG. 図９は、第１の変形例を示す図であって、図６（ｂ）の工程を詳細に示した工程図である。FIG. 9 is a diagram showing a first modification and is a process diagram showing the process of FIG. 6B in detail. 図１０は、第２の変形例を示す図であって、図６（ｂ）の工程を詳細に示した工程図である。FIG. 10 is a diagram showing a second modification, and is a process diagram showing the process of FIG. 6B in detail. 図１１は、第３の変形例を示す図であって、図６（ｂ）の工程を詳細に示した工程図である。FIG. 11 is a diagram showing a third modification, and is a process diagram showing the process of FIG. 6B in detail. 図１２は、本発明を洗髪用ブラシに適用した場合を示す図であって、（ａ）は側面図、（ｂ）は斜視図である。FIGS. 12A and 12B are diagrams showing a case where the present invention is applied to a hair washing brush, in which FIG. 12A is a side view and FIG. 12B is a perspective view. 図１３は、従来の一の歯ブラシの構造を示す断面図である。FIG. 13 is a cross-sectional view showing the structure of one conventional toothbrush. 図１４は、従来の他の歯ブラシの構造を示す断面図である。FIG. 14 is a cross-sectional view showing the structure of another conventional toothbrush. 図１５は、従来の他の歯ブラシの製造方法を示す工程図である。FIG. 15 is a process diagram showing another conventional method of manufacturing a toothbrush. 図１６は、従来の他の歯ブラシの他の製造方法を示す工程図である。FIG. 16 is a process diagram showing another method for manufacturing another conventional toothbrush. 図１７は、従来の他の歯ブラシの植設穴の表面側の拡大図である。FIG. 17 is an enlarged view of the surface side of an implantation hole of another conventional toothbrush.
　以下、本発明の実施の形態を図１乃至図８に基づいて説明する。この実施形態の説明においては、歯ブラシを例にとって説明する。
　尚、図１は、本発明にかかる歯ブラシの一実施形態を示す斜視図であり、（ａ）は歯ブラシの背面側からみた斜視図であり、（ｂ）は歯ブラシの表面側からみた斜視図である。また図２は、図１（ａ）のＩ－Ｉ断面図である。更に、図３は植設穴の拡大図である。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the description of this embodiment, a toothbrush will be described as an example.
FIG. 1 is a perspective view showing an embodiment of a toothbrush according to the present invention, (a) is a perspective view seen from the back side of the toothbrush, and (b) is a perspective view seen from the surface side of the toothbrush. is there. FIG. 2 is a cross-sectional view taken along the line II of FIG. Furthermore, FIG. 3 is an enlarged view of the planting hole.
　図中、符号１は歯ブラシを示し、符号２は歯ブラシ１の柄を示し、この柄の先端部分に歯ブラシ３が設けられる歯ブラシヘッド（以下、ヘッド部という）４が形成されている。前記歯ブラシ３は、複数本の合成樹脂製繊維５からなる毛束５Ａを、前記ヘッド部４の複数個所に植設することにより形成される。 In the figure, reference numeral 1 indicates a toothbrush, reference numeral 2 indicates a handle of the toothbrush 1, and a toothbrush head (hereinafter referred to as a head portion) 4 in which a toothbrush 3 is provided at the tip of the handle is formed. The toothbrush 3 is formed by implanting bristles 5 </ b> A composed of a plurality of synthetic resin fibers 5 at a plurality of locations of the head portion 4.
　また、図２に示すように、前記ヘッド部２の背面側における毛束５Ａの一端部には、塊状部５Ｂが形成されている。この塊状部５Ｂは、毛束５Ａが溶融固化した状態で形成される。
　更に、前記ヘッド部４には、毛束５Ａが挿通し、保持される複数の植設穴６が形成されている。前記植設穴６の上端部には、前記植設穴６の他の部分（小径部）よりも径が大きい大径部６ｂが形成されている。尚、この大径部６ｂは植設穴６の一部を構成するものであり、植設穴６と連通している。即ち、この大径部６ｂは、前記大径部６ｂ（底面部）と植設穴（小径部）６の境界部に、いわゆる段部である係止部６ａを形成するものである。また、前記係止部６ａは前記塊状部５Ｂが係止されるように構成されている。
　尚、前記大径部６ｂは係止部６ａが形成できる程度の径を有していれば良く、必要以上に径を大きくすることは、ヘッド部２に形成される植設穴６の数を少なくすることを意味し、好ましくない。 Further, as shown in FIG. 2, a lump portion 5B is formed at one end of the hair bundle 5A on the back side of the head portion 2. The lump 5B is formed in a state where the hair bundle 5A is melted and solidified.
Further, the head portion 4 is formed with a plurality of planting holes 6 through which the hair bundle 5A is inserted and held. A large-diameter portion 6 b having a larger diameter than the other portion (small-diameter portion) of the planting hole 6 is formed at the upper end portion of the planting hole 6. The large-diameter portion 6 b constitutes a part of the planting hole 6 and communicates with the planting hole 6. That is, the large-diameter portion 6b forms a locking portion 6a which is a so-called step portion at the boundary between the large-diameter portion 6b (bottom surface portion) and the planting hole (small-diameter portion) 6. Moreover, the said latching | locking part 6a is comprised so that the said block-shaped part 5B may be latched.
The large-diameter portion 6b only needs to have a diameter that can form the locking portion 6a. To increase the diameter more than necessary, the number of planting holes 6 formed in the head portion 2 is reduced. This means less and is not preferable.
　この植設穴６は、ヘッド部４の表面４ａ側と背面４ｂ側とを貫通して形成され、植設穴６（大径部６ｂ）の背面側の開口部を、毛束固定部７によって覆うことによって、前記毛束５Ａはヘッド部４に固定される。尚、この毛束固定部７は、ヘッド部４の一部が溶融固化した状態のものである。 The planting hole 6 is formed so as to penetrate the front surface 4 a side and the back surface 4 b side of the head portion 4, and the opening on the back side of the planting hole 6 (large diameter portion 6 b) is formed by the hair bundle fixing unit 7. The hair bundle 5A is fixed to the head part 4 by covering. The hair bundle fixing part 7 is in a state where a part of the head part 4 is melted and solidified.
　前記毛束固定部７は、ヘッド部４の背面４ｂから突出した凸部として形成されている。このように、毛束固定部７の表面がヘッド部４の背面から突出するように構成するのは、ヘッド部４の厚さを薄くしつつ、植設穴６による毛束５Ａの保持長さを長くするためである。
　特に、前記塊状部５Ｂが、前記ヘッド部４の表面４ａから前記ヘッド部厚さｔ１の５０％以上の位置（寸法ｔ２）に、配置されていることが望ましい。
　このヘッド部の厚さとは、ヘッド部の最大厚さをいい、毛束固定部７はヘッド部４の背面４ｂから突出した凸部として形成されている場合には、ヘッド部４の表面から毛束固定部７の凸部表面までの寸法を言う。
　尚、前記ヘッド部厚さの５０％未満の位置に配置されている場合には、ヘッド部４（植設穴６）による毛束の保持長さが短く、また毛の可動支点Ｐ（ヘッド部表面側の植設穴の縁部と毛の接触点）が前記塊状部５Ｂの近傍になるため、毛が抜け易いという弊害が生じるため、好ましくない。また、毛の可動支点Ｐが前記塊状部５Ｂの近傍になるため、毛の振幅（振れ）が大きくなり、毛先が開き易くなるという弊害が生じるため、好ましくない。 The hair bundle fixing portion 7 is formed as a convex portion protruding from the back surface 4 b of the head portion 4. In this way, the configuration in which the surface of the hair bundle fixing portion 7 projects from the back surface of the head portion 4 is that the length of the hair bundle 5A held by the planting hole 6 while the thickness of the head portion 4 is reduced. This is to lengthen the length.
In particular, it is desirable that the massive portion 5B is disposed at a position (dimension t2) of 50% or more of the head portion thickness t1 from the surface 4a of the head portion 4.
The thickness of the head portion means the maximum thickness of the head portion. When the hair bundle fixing portion 7 is formed as a convex portion protruding from the back surface 4b of the head portion 4, the hair from the surface of the head portion 4 is The dimension to the convex part surface of the bundle fixing | fixed part 7 is said.
When the head portion is disposed at a position less than 50% of the thickness, the length of the hair bundle held by the head portion 4 (planting hole 6) is short, and the hair movable fulcrum P (head portion) Since the contact point between the edge of the planting hole on the surface side and the hair is in the vicinity of the lump 5B, it is not preferable because the hair is easily removed. In addition, since the movable fulcrum P of the hair is in the vicinity of the lump portion 5B, the amplitude (vibration) of the hair increases, and the hair tip easily opens, which is not preferable.
　また、図３に示すように、前記ヘッド部４の表面側の植設穴６の開口縁６ｃが、曲面形状あるいは面取りされている。前記ヘッド部４の表面側の植設穴６の開口縁６ｃが垂直な角部である場合には、前記角部により毛５が折れ曲がり易くなり、好ましくない。これに対して、植設穴６の開口縁６ｃが曲面形状あるいは面取りされている場合には、毛５の折れ曲がりが抑制されると共に、製造時に毛束５Ａを挿入する際のガイドとしての機能させることができる。 Further, as shown in FIG. 3, the opening edge 6c of the implantation hole 6 on the surface side of the head portion 4 is curved or chamfered. When the opening edge 6c of the planting hole 6 on the surface side of the head portion 4 is a vertical corner, the hair 5 is easily bent by the corner, which is not preferable. On the other hand, when the opening edge 6c of the planting hole 6 is curved or chamfered, the bending of the bristles 5 is suppressed and also functions as a guide when inserting the bristles 5A during manufacturing. be able to.
　また、図５（ａ）に示すように、前記毛束固定部７は、前記ヘッド部４の背面側の植設穴６（大径部６ｂ）の周囲を囲うように形成された、外形が円筒状あるいは円錐台形状（中心部に植設穴６が形成された）の壁部４ｃを溶融固化して形成される。外形が円筒状あるいは円錐台形状の壁部４ｃの場合、上方からヒータのような加熱溶融装置を押し当てることにより、容易に毛束固定部７を形成することができる。
　尚、前記壁部４ｃは、植設穴６の全周を囲うように形成する必要はなく、植設穴６の一部を囲うものであっても良い。即ち、前記壁部４ｃは、溶融して前記植設穴６（大径部６ｂ）の開口部６ｂ１を塞ぎ、前記塊状部５Ｂを固定できるものであれば良い。 As shown in FIG. 5A, the hair bundle fixing portion 7 has an outer shape formed so as to surround the planting hole 6 (large diameter portion 6b) on the back side of the head portion 4. It is formed by melting and solidifying a wall portion 4c having a cylindrical shape or a truncated cone shape (in which a planting hole 6 is formed in the central portion). In the case of the wall portion 4c having an outer shape of a cylindrical shape or a truncated cone shape, the hair bundle fixing portion 7 can be easily formed by pressing a heating and melting device such as a heater from above.
The wall portion 4c does not need to be formed so as to surround the entire circumference of the planting hole 6, and may surround a part of the planting hole 6. That is, the wall portion 4c only needs to be capable of melting and closing the opening 6b1 of the planting hole 6 (large diameter portion 6b) and fixing the massive portion 5B.
　また前記ヘッド部４は、ポリプロピレン樹脂、ポリアセタール樹脂、ポリオキシメチレン樹脂等の樹脂で、歯ブラシ１の柄２と一体に形成される。また、前記ヘッド部４は、例えば、幅６～１５ｍｍ、長さ１５～３５ｍｍ、厚さ２～７ｍｍに形成される。 The head portion 4 is made of a resin such as polypropylene resin, polyacetal resin, polyoxymethylene resin, etc., and is integrally formed with the handle 2 of the toothbrush 1. The head portion 4 is formed to have a width of 6 to 15 mm, a length of 15 to 35 mm, and a thickness of 2 to 7 mm, for example.
　また、ヘッド部４に植設された合成樹脂製繊維５は、例えば、ヘッド部４の表面から９～１４ｍｍの長さに形成される。前記歯ブラシ３を構成する合成樹脂製繊維５の素材としては、６，６－ナイロン，６－ナイロン、１２－ナイロン、６，１０－ナイロン、６，１２－ナイロン等のポリアミド系樹脂、ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリトリメチレンテレフタレート等のポリエステル系樹脂が用いられている。 Further, the synthetic resin fiber 5 implanted in the head part 4 is formed to have a length of 9 to 14 mm from the surface of the head part 4, for example. The synthetic resin fiber 5 constituting the toothbrush 3 is made of polyamide resin such as 6,6-nylon, 6-nylon, 12-nylon, 6,10-nylon, 6,12-nylon, polyethylene, polypropylene, etc. Polyolefin resins such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and other polyester resins are used.
　この歯ブラシ部３を構成する合成樹脂製繊維５としては、図４（ａ）で拡大した模式図で示すように、先端に向かうにしたがって径が徐々に小さく形成され、先端部に先細りのテーパ面５ａ１が形成されたテーパ繊維５ａと、図４（ｂ）で拡大した模式図で示すように、円柱状の繊維（非テーパ繊維）５ｂとを含んでいる。
　このテーパ繊維５ａのテーパ面５ａ１長さＸは、合成樹脂製繊維の先端から１～５ｍｍの範囲に形成されている。 As shown in the schematic diagram enlarged in FIG. 4A, the synthetic resin fiber 5 constituting the toothbrush portion 3 is formed such that the diameter gradually decreases toward the tip, and the tapered surface is tapered at the tip. The taper fiber 5a in which 5a1 was formed and the columnar fiber (non-taper fiber) 5b are included as shown in the enlarged schematic view of FIG. 4B.
The taper surface 5a1 length X of the taper fiber 5a is formed in the range of 1 to 5 mm from the tip of the synthetic resin fiber.
　このようにテーパ繊維５ａのテーパ面５ａ１長さＸが、合成樹脂製繊維の先端から１～５ｍｍの範囲に形成したのは、歯周ポケット等の掃き出し効果と、歯面の清掃効果を考慮したものである。その結果、中程度の歯周炎を患っている患者に対応した歯ブラシとすることができる。
　即ち、テーパ面５ａ１長さＸが１ｍｍ未満の場合、テーパ繊維５ａが歯周ポケットの深部まで侵入せず、前記ポケット奥の清掃が不十分になる。一方、テーパ面５ａ１長さＸが５ｍｍを超える場合、毛先（テーパ繊維）が細くなり過ぎ、歯周ポケット内の汚れを掃き出し難く、また、腰（曲げに対する反発力）が弱く、歯面を磨く効果も低下するため、好ましくない。 The taper surface 5a1 length X of the tapered fiber 5a is formed in the range of 1 to 5 mm from the tip of the synthetic resin fiber in consideration of the sweeping effect of the periodontal pocket and the like and the cleaning effect of the tooth surface. Is. As a result, a toothbrush corresponding to a patient suffering from moderate periodontitis can be obtained.
That is, when the taper surface 5a1 length X is less than 1 mm, the taper fiber 5a does not penetrate to the deep part of the periodontal pocket, and the back of the pocket becomes insufficiently cleaned. On the other hand, when the taper surface 5a1 length X exceeds 5 mm, the hair tip (taper fiber) becomes too thin, it is difficult to sweep out dirt in the periodontal pocket, and the waist (repulsive force against bending) is weak. Since the effect of polishing is also reduced, it is not preferable.
　この合成樹脂製繊維としては、直径が０．１０ｍｍ～０．２５ｍｍ程度のものが適度な弾力が得られると共に、曲がりや折れなどの抑制効果も有しており、歯ブラシの歯ブラシとして好適に利用することができる。
　前記直径は、テーパ繊維５ａ及び非テーパ繊維５ｂ共に、好ましくは０．１５ｍｍ～０．２５ｍｍのものが良い。尚、前記テーパ繊維５ａの直径は、円柱部（テーパ面５ａ１が形成されていない部分）の径である。 As this synthetic resin fiber, a fiber having a diameter of about 0.10 mm to 0.25 mm has an appropriate elasticity and also has an effect of suppressing bending and bending, and is suitably used as a toothbrush of a toothbrush. be able to.
The diameter of both the tapered fiber 5a and the non-tapered fiber 5b is preferably 0.15 mm to 0.25 mm. In addition, the diameter of the said taper fiber 5a is a diameter of a cylindrical part (part in which the taper surface 5a1 is not formed).
　また、前記合成樹脂製繊維は円柱状以外に、その断面形状が楕円形状、星型形状、まゆ型形状、十字型形状、多角形型形状のいずれであっても良い。 In addition to the cylindrical shape, the synthetic resin fiber may have an elliptical shape, a star shape, an eyebrow shape, a cross shape, or a polygonal shape in cross section.
　また、合成樹脂製繊維５が集合した一つ束の繊維の数は、適宜設定することができるが、通常一つの植毛穴６から飛び出る本数として２０～５０本のものを好適に利用することができる。また、前記歯ブラシ１の柄２の先端部に植設される繊維束５Ａ（植毛穴６）の数は、適宜設定することができるが、通常１４箇所～４０箇所植設されるものを好適に利用することができる。 In addition, the number of fibers in one bundle in which the synthetic resin fibers 5 are assembled can be set as appropriate. Usually, 20 to 50 fibers that protrude from one flock hole 6 can be preferably used. it can. Further, the number of fiber bundles 5A (planting holes 6) to be implanted at the tip of the handle 2 of the toothbrush 1 can be set as appropriate, but those normally implanted at 14 to 40 locations are preferred. Can be used.
　以上のように構成された歯ブラシにあっては、平線を用いることなく、植設穴６に挿通した毛束５Ａの一端部に形成された塊状部５Ｂを、ヘッド部４の一部を溶融固化した状態の毛束固定部７によって固定される。そのため、従来の歯ブラシのように一つの凹部内に樹脂を充填しないため、前記毛束を固定する固定部とヘッド部の界面が存在せず、固定部が脱落するという弊害を防止することができる。 In the toothbrush configured as described above, a lump portion 5B formed at one end of the bristle bundle 5A inserted through the planting hole 6 is melted with a part of the head portion 4 without using a flat wire. It is fixed by the hair bundle fixing part 7 in a solidified state. Therefore, unlike the conventional toothbrush, resin is not filled in one concave portion, so that there is no interface between the fixing portion and the head portion for fixing the hair bundle, and the adverse effect that the fixing portion falls off can be prevented. .
　また、前記歯ブラシは、歯ブラシ本体部（ヘッド部と柄部）の形成と毛束のヘッド部への固定が同時に行われる従来の歯ブラシと異なり、毛の下端部同士が接着されることはなく、また毛の下端部が歯ブラシ本体部（ヘッド部）に接着されることもない。
　また、前記歯ブラシの植毛穴は、前記従来の歯ブラシのように毛束に倣った形状にならず、毛の下端部と歯ブラシ本体部（ヘッド部）との間に隙間が形成される。
　その結果、水抜けが良く、また毛束の所定のしなやかさを維持できる使用感の良い歯ブラシを得ることができる。
　特に、また植毛穴の形状を所望の形状に維持することができるため、植毛穴と毛束との間に隙間を形成できると共に、植毛穴の面積と毛束の総面積の割合（毛束の占有率）を、所望の割合に容易になすことができ、所望の水抜け、所望の毛束のしなやかさを有する歯ブラシを得ることができる。 In addition, unlike the conventional toothbrush, in which the toothbrush is formed simultaneously with the formation of the toothbrush body (head portion and handle portion) and the bristles are fixed to the head portion, the lower ends of the hairs are not bonded to each other, Further, the lower end portion of the bristles is not bonded to the toothbrush body portion (head portion).
Further, the flocked hole of the toothbrush does not have a shape following the hair bundle as in the conventional toothbrush, and a gap is formed between the lower end portion of the bristles and the toothbrush body portion (head portion).
As a result, it is possible to obtain a toothbrush with good usability that drains well and can maintain the predetermined flexibility of the hair bundle.
In particular, since the shape of the flocked hole can be maintained in a desired shape, a gap can be formed between the flocked hole and the hair bundle, and the ratio of the area of the flocked hole to the total area of the hair bundle (of the hair bundle) Occupancy ratio) can be easily achieved at a desired ratio, and a toothbrush having desired drainage and desired bristle bundle flexibility can be obtained.
　次に、本発明にかかる歯ブラシの製造方法の一実施形態について説明する。
　まず、図５（ａ）に示すように、複数の貫通した植設穴６と、前記植設穴６の上部に設けられた大径部６ｂの底面に形成された係止部６ａとを備えるヘッド部４を有する歯ブラシ１を樹脂成形により形成する。
　前記ヘッド部４を有する歯ブラシ１を形成した後、図５（ｂ）に示すように、複数の合成樹脂製繊維５からなる毛束５Ａを、前記植設穴６に挿通する。このとき、前記植設穴６の表面側の開口縁（開口部６ｃ）が曲面形状あるいは面取りされている。
　そのため、植設穴６の表面側の開口縁（開口部６ｃ）は、前記毛束５Ａを挿入する際のガイドとして機能し、前記毛束５Ａを前記植設穴６に容易に挿通することができる。 Next, an embodiment of a method for producing a toothbrush according to the present invention will be described.
First, as shown to Fig.5 (a), the some penetration hole 6 penetrated and the latching | locking part 6a formed in the bottom face of the large diameter part 6b provided in the upper part of the said implantation hole 6 are provided. The toothbrush 1 having the head portion 4 is formed by resin molding.
After forming the toothbrush 1 having the head portion 4, as shown in FIG. 5 (b), a bristle bundle 5 </ b> A composed of a plurality of synthetic resin fibers 5 is inserted into the planting hole 6. At this time, the opening edge (opening 6c) on the surface side of the planting hole 6 is curved or chamfered.
Therefore, the opening edge (opening part 6c) on the surface side of the planting hole 6 functions as a guide when inserting the hair bundle 5A, and the hair bundle 5A can be easily inserted into the planting hole 6. it can.
　前記植設穴６に毛束５Ａを挿通した後、図５（ｃ）に示すように、ヘッド部４の背面側における毛束５Ａの一端部を、加熱溶融装置８により、溶融、固化し、塊状部５Ｂを形成する。
　この加熱溶融装置８としては、一般的に用いられているヒータのような加熱溶融装置、あるいはインパルスウェルダー（ＩＰＷ）を用いることができる。
　前記ヒータを用いる場合には、毛束５Ａの一端部に近接（非接触）させて加熱溶融するため、塊状部５Ｂの形状の形を整えることができない。そのため、後の工程の押し込み工程で、塊状部５Ｂを大径部６ｂ内に収容することができない虞がある。
　一方、インパルスウェルダー（ＩＰＷ）を用いる場合には、加熱チップ８ａを有し、前記加熱チップ８ａに接触させることにより、塊状部５Ｂを形成するため、その形状を整えることができ、塊状部５Ｂを大径部６ｂ内に収容できないという弊害を防止することができる。 After inserting the hair bundle 5A through the planting hole 6, as shown in FIG. 5C, one end of the hair bundle 5A on the back side of the head part 4 is melted and solidified by the heating and melting device 8. The massive portion 5B is formed.
As the heating and melting apparatus 8, a generally used heating and melting apparatus such as a heater or an impulse welder (IPW) can be used.
In the case of using the heater, the shape of the lump portion 5B cannot be adjusted because it is heated and melted close to (not in contact with) one end portion of the hair bundle 5A. Therefore, there is a possibility that the block portion 5B cannot be accommodated in the large-diameter portion 6b in the pushing step of the subsequent step.
On the other hand, when an impulse welder (IPW) is used, since it has a heating tip 8a and is brought into contact with the heating tip 8a to form the block portion 5B, the shape can be adjusted. It is possible to prevent an adverse effect that it cannot be accommodated in the large diameter portion 6b.
　図７に基づいて、インパルスウェルダー（ＩＰＷ）を用いて塊状部５Ｂを形成する場合について説明する。
　前記したように、インパルスウェルダー（ＩＰＷ）を用いる場合には、加熱チップ８ａを有し、前記加熱チップ８ａには所定形状のキャビティ８ａ１が形成されている。この加熱チップ８ａを、図７（ａ）に示す状態から下降させる。そして、図７（ｂ）に示すように、キャビティ８ａ内に毛束５Ａの一端部を収容し、加熱溶融する。このとき、毛束５Ａの一端部は、前記キャビティ８ａによって成形され、所定形状の塊状部５Ｂとすることができる。 Based on FIG. 7, the case where the lump part 5B is formed using an impulse welder (IPW) is demonstrated.
As described above, when an impulse welder (IPW) is used, it has a heating chip 8a, and a cavity 8a1 having a predetermined shape is formed in the heating chip 8a. The heating chip 8a is lowered from the state shown in FIG. And as shown in FIG.7 (b), the one end part of 5 A of hair | bristle bundles is accommodated in the cavity 8a, and it heat-melts. At this time, one end portion of the hair bundle 5A is formed by the cavity 8a, and can be formed into a lump portion 5B having a predetermined shape.
　更に、図５（ｄ）に戻って説明する。
　図５（ｄ）に示すように、合成樹脂製繊維（毛）５の毛束５Ａを切断した後、図６（ａ）に示すように、押しピン９で、前記大径部６ｂの底面によって形成された係止部６ａまで前記塊状部５Ｂを押し込み、前記塊状部５Ｂを係止部６ａに係止させる。
　尚、この押し込み工程では、押しピン９で塊状部５Ｂを押し込む法を説明したが、本発明はこれに限定されるものではなく、空気を噴射するノズルを設け、該空気を塊状部５Ｂに噴射し、塊状部５Ｂを押し込んでも良い。 Furthermore, returning to FIG.
As shown in FIG. 5 (d), after the hair bundle 5A of the synthetic resin fibers (hairs) 5 is cut, as shown in FIG. 6 (a), the push pin 9 causes the bottom surface of the large-diameter portion 6b. The lump portion 5B is pushed into the formed locking portion 6a, and the lump portion 5B is locked to the locking portion 6a.
In this pushing step, the method of pushing the block portion 5B with the push pin 9 has been described. However, the present invention is not limited to this, and a nozzle for injecting air is provided, and the air is injected into the block portion 5B. Then, the block 5B may be pushed in.
　前記塊状部５Ｂの押し込み工程の後、図６（ｂ）に示すように、毛束固定部７を形成する。この毛束固定部７の形成には、インパルスウェルダー（ＩＰＷ）を用いる。
　この毛束固定部７の形成工程を、図８に基づいて説明する。前記したように、インパルスウェルダー（ＩＰＷ）は加熱チップ８ｂを有し、前記加熱チップ８ｂには所定形状のキャビティ８ｂ１が形成されている（図８（ａ）参照）。 After the step of pushing in the massive portion 5B, the hair bundle fixing portion 7 is formed as shown in FIG. An impulse welder (IPW) is used to form the hair bundle fixing portion 7.
The formation process of this hair | bristle bundle fixing | fixed part 7 is demonstrated based on FIG. As described above, the impulse welder (IPW) includes the heating chip 8b, and the heating chip 8b is formed with a cavity 8b1 having a predetermined shape (see FIG. 8A).
　図８（ｂ）に示すように、この加熱チップ８ｂを下降させ、キャビティ８ａ内に壁部４ｃを収容し、加熱溶融する。このとき、キャビティ８ａ内の形状に対応して、壁部４ｃは塊状部５Ｂの背面側を覆う方向に倒れ、前記大径部６ｂの上部開口部６ｂ１を塞ぎ、塊状部５Ｂを固定する毛束固定部７が形成される。即ち、前記塊状部５Ｂは、前記壁部４ｃが加熱溶融され固化することにより、ヘッド部４内に埋設され、固定される。
　図８（ｃ）に示すように、前記加熱チップ８ｂを上昇させることにより、ヘッド部４（歯ブラシ１）が完成する。 As shown in FIG. 8B, the heating tip 8b is lowered, the wall 4c is accommodated in the cavity 8a, and is melted by heating. At this time, corresponding to the shape in the cavity 8a, the wall 4c falls in a direction covering the back side of the massive portion 5B, closes the upper opening 6b1 of the large diameter portion 6b, and fixes the massive portion 5B. A fixing portion 7 is formed. In other words, the massive portion 5B is embedded and fixed in the head portion 4 when the wall portion 4c is heated and melted and solidified.
As shown in FIG. 8C, the head portion 4 (toothbrush 1) is completed by raising the heating tip 8b.
　このように、ヘッド部４の一部（壁部４ｃ）を溶融固化することにより、毛束固定部７が形成されるため、従来の歯ブラシのような毛束を固定する固定部とヘッド部の界面が存在せず、機械的強度を増大させることができる。
　また、従来の歯ブラシのように成形金型５０を必要としないため、安価にヘッド部４（歯ブラシ１）を製造することができる。
　しかも、前記歯ブラシは、従来の歯ブラシのように、毛束を構成する毛の下端部同士が接着されることはなく、また毛の下端部が歯ブラシ本体部（ヘッド部）に接着されることもない。また、前記歯ブラシの植毛穴は、歯ブラシ本体部（ヘッド部と柄部）の形成と毛束のヘッド部への固定が同時に行われる従来の歯ブラシと異なり、毛束に倣った形状にならず、毛の下端部と歯ブラシ本体部（ヘッド部）との間に隙間が形成され、植毛穴の形状を維持することができる。
　その結果、水抜けが良く、また毛束の所定のしなやかさを維持できる使用感の良い歯ブラシとなすことができる。 In this way, since the bristle bundle fixing part 7 is formed by melting and solidifying a part of the head part 4 (wall part 4c), the fixing part for fixing the bristle bundle like a conventional toothbrush and the head part are formed. There is no interface and the mechanical strength can be increased.
Moreover, since the molding die 50 is not required unlike the conventional toothbrush, the head part 4 (toothbrush 1) can be manufactured at low cost.
In addition, unlike the conventional toothbrush, the lower ends of the bristles constituting the hair bundle are not bonded to each other, and the lower ends of the bristles are bonded to the toothbrush main body (head portion). Absent. Moreover, unlike the conventional toothbrush in which the flocking hole of the toothbrush is formed simultaneously with the formation of the toothbrush main body (head portion and handle portion) and the hair bundle is fixed to the head portion, the shape does not follow the hair bundle, A gap is formed between the lower end portion of the bristles and the toothbrush body portion (head portion), and the shape of the flock hole can be maintained.
As a result, it is possible to provide a toothbrush with good usability that drains well and can maintain the predetermined flexibility of the hair bundle.
　次に、上記実施形態の第１の変形例について、図９に基づいて説明する。尚、図９において図１乃至図８に示した部材と同一あるいは相当する部材は、同一符号を付し、その説明を省略する。
　上記実施形態の毛束固定部７は、前記ヘッド部４の背面側の植設穴６（大径部６ｂ）の周囲を囲うように形成された、ヘッド部の一部である壁部４ｃを溶融固化して形成されたものである。
　これに対して、第１の変形例は、植設穴（大径部６ｂ）の背面側に配置された（ヘッド部と別部材である）、外形が円筒状あるいは円錐台筒形状の閉塞部材１０Ａを溶融固化することにより形成される点において特徴がある。 Next, a first modification of the above embodiment will be described with reference to FIG. In FIG. 9, members that are the same as or correspond to those shown in FIGS. 1 to 8 are given the same reference numerals, and descriptions thereof are omitted.
The hair bundle fixing portion 7 of the above embodiment includes a wall portion 4c, which is a part of the head portion, formed so as to surround the planting hole 6 (large diameter portion 6b) on the back side of the head portion 4. It is formed by melting and solidifying.
On the other hand, the first modified example is a blocking member that is arranged on the back side of the planting hole (large-diameter portion 6b) (is a separate member from the head portion) and has an outer shape that is cylindrical or frustoconical. It is characterized in that it is formed by melting and solidifying 10A.
　この毛束固定部７の形成工程を、図９に基づいて説明する。
　図９（ａ）に示すように、閉塞部材１０Ａを植設穴６の背面側（大径部６ｂ側）に配置する。次に、図９（ｂ）に示すように、インパルスウェルダー（ＩＰＷ）の加熱チップ８ｂを下降させ、キャビティ８ａ内に閉塞部材１０Ａを収容し、加熱溶融する。このとき、キャビティ８ａ内の形状に対応して、閉塞部材１０Ａは塊状部５Ｂの背面側を覆う方向に倒れ、大径部６ｂの開口部６ｂ１を塞ぎ、塊状部５Ｂを固定する毛束固定部７が形成される。即ち、前記塊状部５Ｂは、前記閉塞部材１０Ａが加熱溶融され固化することにより、ヘッド部４内に埋設され、固定される。
　図９（ｃ）に示すように、前記加熱チップ８ｂを上昇させることにより、ヘッド部４（歯ブラシ１）が完成する。 The formation process of this hair | bristle bundle fixing | fixed part 7 is demonstrated based on FIG.
As shown in FIG. 9A, the closing member 10 </ b> A is disposed on the back side (large diameter portion 6 b side) of the planting hole 6. Next, as shown in FIG. 9B, the heating tip 8b of the impulse welder (IPW) is lowered, and the closing member 10A is accommodated in the cavity 8a and melted by heating. At this time, corresponding to the shape in the cavity 8a, the closing member 10A falls in a direction to cover the back side of the massive portion 5B, closes the opening 6b1 of the large diameter portion 6b, and fixes the massive portion 5B. 7 is formed. That is, the block portion 5B is embedded and fixed in the head portion 4 when the closing member 10A is heated and melted and solidified.
As shown in FIG. 9C, the head portion 4 (toothbrush 1) is completed by raising the heating tip 8b.
　次に、上記実施形態の第２の変形例について、図１０に基づいて説明する。尚、図１０において図１乃至図８に示した部材と同一あるいは相当する部材は、同一符号を付し、その説明を省略する。
　この第２の変形例は、植設穴の背面側に配置された（ヘッド部と別部材である）、外形が球状あるいは断面が楕円形状の閉塞部材１０Ｂを溶融することにより形成される点において特徴がある。 Next, a second modification of the above embodiment will be described with reference to FIG. In FIG. 10, members that are the same as or correspond to those shown in FIGS. 1 to 8 are given the same reference numerals, and descriptions thereof are omitted.
This second modification is formed by melting a closing member 10B which is arranged on the back side of the planting hole (which is a separate member from the head portion) and has an outer shape that is spherical or has an elliptical cross section. There are features.
　この毛束固定部７の形成工程を、図１０に基づいて説明する。
　図１０（ａ）に示すように、閉塞部材１０Ｂを植設穴６（大径部６ｂ）の背面側に配置する。このとき、閉塞部材１０Ｂの外形が球状あるいは断面が楕円形状に形成されているため、閉塞部材１０Ｂの一部が、大径部６ｂ内に進入し、仮固定される。
　その後、図１０（ｂ）に示すように、インパルスウェルダー（ＩＰＷ）の加熱チップ８ｂを下降させ、キャビティ８ａ内に閉塞部材１０Ｂを収容し、加熱溶融し固化することにより、塊状部５Ｂを固定する毛束固定部７が形成される。
　即ち、前記塊状部５Ｂは、前記閉塞部材１０Ｂが加熱溶融され固化することにより、ヘッド部４内に埋設され、固定される。図１０（ｃ）に示すように、前記加熱チップ８ｂを上昇させることにより、ヘッド部４（歯ブラシ１）が完成する。 The formation process of this hair | bristle bundle fixing | fixed part 7 is demonstrated based on FIG.
As shown to Fig.10 (a), the obstruction | occlusion member 10B is arrange | positioned at the back side of the planting hole 6 (large diameter part 6b). At this time, since the outer shape of the closing member 10B is formed in a spherical shape or an elliptical cross section, a part of the closing member 10B enters the large diameter portion 6b and is temporarily fixed.
After that, as shown in FIG. 10B, the heating chip 8b of the impulse welder (IPW) is lowered, the closing member 10B is accommodated in the cavity 8a, heated, melted and solidified to fix the massive portion 5B. A hair bundle fixing part 7 is formed.
That is, the block portion 5B is embedded and fixed in the head portion 4 when the closing member 10B is heated and melted and solidified. As shown in FIG. 10C, the head portion 4 (toothbrush 1) is completed by raising the heating tip 8b.
　次に、上記実施形態の第３の変形例について、図１１に基づいて説明する。尚、図１１において図１乃至図８に示した部材と同一あるいは相当する部材は、同一符号を付し、その説明を省略する。
　この第３の変形例は、植設穴の背面側に配置された（ヘッド部と別部材である）、外形がシート状の閉塞部材１０Ｃを溶融固化することにより形成される点において特徴がある。
　尚、この変形例あっては、大径部６ｂが形成されない場合を示している。 Next, the 3rd modification of the said embodiment is demonstrated based on FIG. In FIG. 11, the same or corresponding members as those shown in FIGS. 1 to 8 are designated by the same reference numerals, and the description thereof is omitted.
This third modification is characterized in that it is formed by melting and solidifying a sheet-like closing member 10C that is disposed on the back side of the planting hole (which is a separate member from the head portion). .
In addition, in this modification, the case where the large diameter part 6b is not formed is shown.
　この毛束固定部７の形成工程を、図１１に基づいて説明する。
　図１１（ａ）に示すように、閉塞部材１０Ｃを植設穴６の背面側に配置する。このとき、閉塞部材１０Ｃがシート状に形成されているため、閉塞部材１０Ｃは、ヘッド部４の上面（背面）に載置ことにより、仮固定される。尚、塊状部５Ｂは、植設穴６の上縁部が係止部６ａとなり、前記係止部６ａに係止される。
　その後、図１１（ｂ）に示すように、インパルスウェルダー（ＩＰＷ）の加熱チップ８ｂを下降させ、キャビティ８ａ内に閉塞部材１０Ｃを収容し、加熱溶融し固化することにより、塊状部５Ｂを固定する毛束固定部７が形成される。即ち、前記塊状部５Ｂは、前記閉塞部材１０Ｃが加熱溶融、固化することにより、ヘッド部４（ヘッド部背面）に埋設され、固定される。
　そして、図１１（ｃ）に示すように、前記加熱チップ８ｂを上昇させることにより、ヘッド部４（歯ブラシ１）が完成する。 The formation process of this hair | bristle bundle fixing | fixed part 7 is demonstrated based on FIG.
As shown in FIG. 11A, the closing member 10 </ b> C is disposed on the back side of the planting hole 6. At this time, since the closing member 10 </ b> C is formed in a sheet shape, the closing member 10 </ b> C is temporarily fixed by being placed on the upper surface (back surface) of the head portion 4. In addition, the lump portion 5B is locked to the locking portion 6a with the upper edge portion of the planting hole 6 serving as the locking portion 6a.
Thereafter, as shown in FIG. 11 (b), the heating tip 8b of the impulse welder (IPW) is lowered, the closing member 10C is accommodated in the cavity 8a, heated, melted and solidified to fix the massive portion 5B. A hair bundle fixing part 7 is formed. That is, the block portion 5B is embedded and fixed in the head portion 4 (the back surface of the head portion) when the closing member 10C is heated and melted and solidified.
And as shown in FIG.11 (c), the head part 4 (toothbrush 1) is completed by raising the said heating chip | tip 8b.
　尚、上記実施形態にあっては、ヘッド部の一部あるいは前記ヘッド部と別の合成樹脂製の閉塞部材を溶融固化することにより、毛束固定部を形成する場合について説明した。
　しかし、本発明はこれに限定されるものではなく、従来のように成形装置によって背面充填材（合成樹脂）を前記大径部６ｂに充填しても良い。この場合、一つの凹部が形成されている従来の歯ブラシと比べて、前記大径部６ｂの体積が前記凹部の体積よりも小さいために、前記大径部６ｂに低い注入圧で背面充填材（合成樹脂）を充填することができ、しかも毛束を確実に固定できる毛束固定部７を形成することができる。 In addition, in the said embodiment, the case where the hair | bristle bundle fixing | fixed part was formed by melt-solidifying a part of head part or the said synthetic resin sealing member different from the said head part was demonstrated.
However, the present invention is not limited to this, and the large-diameter portion 6b may be filled with a back surface filling material (synthetic resin) by a molding apparatus as in the prior art. In this case, since the volume of the large-diameter portion 6b is smaller than the volume of the concave portion as compared with the conventional toothbrush in which one concave portion is formed, the back surface filler ( Synthetic resin) can be filled, and furthermore, the hair bundle fixing part 7 capable of reliably fixing the hair bundle can be formed.
　また、上記実施形態にあっては、歯ブラシを例にとって説明したが、本発明はこれに限定されるものではなく、例えば、ヘアブラシ、ボディブラシ、メイクブラシ、靴ブラシ、洋服ブラシ等のブラシ適用することができる。 Moreover, in the said embodiment, although demonstrated taking the case of the toothbrush as an example, this invention is not limited to this, For example, brushes, such as a hair brush, a body brush, a makeup brush, a shoe brush, and a clothes brush, are applied. be able to.
　具体的に、図１２に洗髪用ブラシの例を挙げて説明する。尚、図１２において、図１乃至図８に示した部材と同一あるいは相当する部材は、同一符号を付し、その説明を省略する。
　この洗髪用ブラシのヘッド部４は環状に形成され、その中心部に貫通穴４Ａが形成されている。この貫通穴４Ａは水抜きのために形成されている。そして、前記ヘッド部４の背面側には、複数の植設穴の夫々に、かつ個別に毛束固定部７が設けられている。この毛束固定部７は、前記係止部に係止された毛束の塊状部の背面側を覆い、かつ前記植設穴（大径部）を閉塞する、樹脂を溶融固化した状態のものである。
　このように構成された洗髪用ブラシは、水抜けが良く、また毛束の所定のしなやかさを維持できる使用感の良いという効果を奏するものである。
Specifically, an example of a hair washing brush will be described with reference to FIG. In FIG. 12, members that are the same as or correspond to those shown in FIG. 1 to FIG.
The head portion 4 of the hair washing brush is formed in an annular shape, and a through hole 4A is formed at the center thereof. This through hole 4A is formed for draining water. Further, on the back side of the head portion 4, a hair bundle fixing portion 7 is provided for each of the plurality of planting holes and individually. This hair bundle fixing portion 7 covers the back side of the lump portion of the hair bundle locked to the locking portion and closes the planting hole (large diameter portion), in a state where the resin is melted and solidified. It is.
The hair washing brush configured in this way has the effect of good drainage and good usability that can maintain the predetermined flexibility of the hair bundle.
１　　　　歯ブラシ
２　　　　歯ブラシの柄
３　　　　歯ブラシ
４　　　　ヘッド部
４ａ　　　ヘッド部表面
４ｂ　　　ヘッド部背面
４ｃ　　　壁部
５　　　　合成樹脂製繊維
５Ａ　　　毛束
５Ｂ　　　塊状部
５ａ　　　テーパ繊維
５ａ１　　テーパ面
５ｂ　　　非テーパ繊維
６　　　　植設穴
６ａ　　　係止部
６ｂ　　　大径部
６ｂ１　　大径部開口部
６ｃ　　　表面側開口部
７　　　　毛束固定部
８　　　　加熱溶融装置
８ａ　　　加熱チップ
８ａ１　　キャビティ
８ｂ　　　加熱チップ
８ｂ１　　キャビティ
９　　　　押しピン
１０Ａ　　　閉塞部材
１０Ｂ　　　閉塞部材
１０Ｃ　　　閉塞部材
Ｐ　　　　可動支点
Ｘ　　　　テーパ面長さ
Ｙ　　　　非テーパ面長さ DESCRIPTION OF SYMBOLS 1 Toothbrush 2 Toothbrush handle 3 Toothbrush 4 Head part 4a Head part surface 4b Head part back surface 4c Wall part 5 Synthetic resin fiber 5A Hair bundle 5B Mass part 5a Tapered fiber 5a1 Tapered surface 5b Non-tapered fiber 6 Planting hole 6a Locking Part 6b large diameter part 6b1 large diameter part opening part 6c surface side opening part 7 hair bundle fixing part 8 heating and melting apparatus 8a heating chip 8a1 cavity 8b heating chip 8b1 cavity 9 push pin 10A closing member 10B closing member 10C closing member P movable fulcrum X Taper surface length Y Non-taper surface length

Claims (9)

  1. 　平線を用いることなく、毛束を合成樹脂製のヘッド部に植設したブラシにおいて、
    　前記ヘッド部の表面と背面を貫通した複数の植設穴と、
    　複数の合成樹脂製繊維からなり、前記複数の植設穴の夫々に挿通される複数の毛束と、
    　前記複数の植設穴に挿通した夫々の毛束のヘッド部背面側の一端部に形成された、前記毛束が溶融固化した状態の塊状部と、
    　前記毛束の塊状部が係止される係止部と、
    　前記複数の植設穴の夫々に設けられた、前記係止部に係止された毛束の塊状部の背面側を覆い、かつ前記植設穴を閉塞する、樹脂を溶融固化した状態の複数の毛束固定部と、
    　を備え、
    　前記一つの毛束が一つの毛束固定部によって、前記ヘッド部に固定されていることを特徴とすることを特徴とするブラシ。     Without using a flat wire, in a brush planted in a synthetic resin head part,
    A plurality of planting holes penetrating the front and back surfaces of the head part;
    A plurality of hair bundles made of a plurality of synthetic resin fibers and inserted through each of the plurality of planting holes,
    A lump formed in one end portion on the back side of the head portion of each of the hair bundles inserted through the plurality of planting holes, in a state where the hair bundle is melted and solidified,
    A locking portion where the lump of the hair bundle is locked;
    A plurality of resin melted and solidified covering the back side of the lump-like portion of the hair bundle locked to the locking portion provided in each of the plurality of planting holes and closing the planting hole The hair bundle fixing part of the
    With
    The brush characterized in that the one hair bundle is fixed to the head portion by one hair bundle fixing portion.
  2. 　前記複数の植設穴の夫々に設けられた毛束固定部が、前記ヘッド部の一部あるいは前記ヘッド部と別の閉塞部材が溶融固化した状態の毛束固定部であることを特徴とすることを特徴とする請求項１記載のブラシ。 The hair bundle fixing portion provided in each of the plurality of planting holes is a hair bundle fixing portion in a state in which a part of the head portion or a closing member different from the head portion is melted and solidified. The brush according to claim 1.
  3. 　前記複数の植設穴の夫々に設けられた毛束固定部の表面が、ヘッド部背面から突出していることを特徴とする請求項１または請求項２記載のブラシ。 The brush according to claim 1 or 2, wherein a surface of a hair bundle fixing portion provided in each of the plurality of planting holes protrudes from a back surface of the head portion.
  4. 　前記毛束の塊状部が、前記ヘッド部の表面を基準として、前記ヘッド部厚さの５０％以上の位置に配置されていることを特徴とする請求項１乃至請求項３のいずれかに記載のブラシ。 The lump part of the said hair | bristle bundle is arrange | positioned in the position of 50% or more of the said head part thickness on the basis of the surface of the said head part, The Claim 1 thru | or 3 characterized by the above-mentioned. Brush.
  5. 　前記ヘッド部の表面側の植設穴の開口縁が、曲面形状あるいは面取りされていることを特徴とする請求項１乃至請求項４のいずれかに記載のブラシ。 The brush according to any one of claims 1 to 4, wherein an opening edge of the planting hole on the surface side of the head portion is curved or chamfered.
  6. 　請求項１乃至請求項５のいずれかに記載のブラシの製造方法において、
    　複数の貫通した植設穴と、前記係止部とを備えるヘッド部を樹脂成形により形成する工程と、
    　前記ヘッド部形成工程の後、複数の合成樹脂製繊維からなる毛束を、前記植設穴に挿通する工程と、
    　前記植設穴に毛束を挿通する工程の後、ヘッド部の背面側における毛束の一端部を、溶融固化し、塊状部を形成する工程と、
    　前記塊状部の形成工程の後、前記塊状部を前記係止部に係止する工程と、
    　前記複数の植設穴の夫々に形成され、かつ溶融した樹脂により前記塊状部の背面側を覆い、前記溶融した樹脂が固化することにより前記毛束を前記ヘッド部に固定する、複数の毛束固定部を形成する工程と、
    　を備え、
    　前記毛束固定部を形成する工程では、前記一つの毛束が一つの毛束固定部によって、前記ヘッド部に固定されることを特徴とするブラシの製造方法。     In the manufacturing method of the brush in any one of Claims 1 thru | or 5,
    Forming a head portion including a plurality of penetrating holes and the locking portion by resin molding;
    After the head portion forming step, a step of inserting a hair bundle made of a plurality of synthetic resin fibers into the planting hole;
    After the step of inserting the hair bundle into the planting hole, the step of melting and solidifying one end portion of the hair bundle on the back side of the head portion to form a lump portion,
    After the step of forming the lump portion, the step of locking the lump portion to the locking portion;
    A plurality of hair bundles that are formed in each of the plurality of planting holes, cover the back side of the lump portion with molten resin, and fix the hair bundle to the head portion by solidifying the molten resin. Forming a fixing part;
    With
    In the step of forming the hair bundle fixing part, the one hair bundle is fixed to the head part by one hair bundle fixing part.
  7. 　毛束固定部を形成する工程において、前記毛束固定部は、前記複数の植設穴の夫々に、溶融した樹脂が注入充填され、前記樹脂が固化することにより、前記毛束固定部が形成されることを特徴とする請求項６記載のブラシの製造方法。 In the step of forming the hair bundle fixing portion, the hair bundle fixing portion is formed by injecting and filling molten resin into each of the plurality of planting holes and solidifying the resin. The method for manufacturing a brush according to claim 6, wherein:
  8. 　前記ヘッド部形成工程において、前記ヘッド部の背面側の複数の植設穴の夫々に、植設穴の周囲を囲うように壁部を形成し、
    　前記毛束をヘッド部に固定する工程において、前記壁部を溶融固化し、前記ヘッド部の背面側の複数の植設穴の夫々に、前記塊状部の背面側を覆う毛束固定部を形成することを特徴とする請求項６記載のブラシの製造方法。     In the head part forming step, each of the plurality of planting holes on the back side of the head part is formed with a wall so as to surround the circumference of the planting hole,
    In the step of fixing the hair bundle to the head portion, the wall portion is melted and solidified, and a hair bundle fixing portion that covers the back side of the massive portion is formed in each of the plurality of planting holes on the back side of the head portion. The method of manufacturing a brush according to claim 6.
  9. 　前記毛束をヘッド部に固定する工程において、前記ヘッド部の背面側の複数の植設穴の夫々に、前記ヘッド部の背面側の植設穴の周囲を囲うようにヘッド部と別の閉塞部材を配置し、前記閉塞部材を溶融固化し、前記ヘッド部の背面側の複数の植設穴の夫々に、前記塊状部の背面側を覆う毛束固定部を形成することを特徴とする請求項６記載のブラシの製造方法。 In the step of fixing the hair bundle to the head part, each of the plurality of planting holes on the back side of the head part is closed separately from the head part so as to surround the circumference of the planting hole on the back side of the head part. A member is arranged, the blocking member is melted and solidified, and a hair bundle fixing portion that covers the back side of the massive portion is formed in each of the plurality of planting holes on the back side of the head portion. Item 7. A method for producing a brush according to Item 6.
PCT/JP2016/062313 2015-09-28 2016-04-19 Brush and brush manufacturing method WO2017056539A1 (en)

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KR200490316Y1 (en) * 2017-12-07 2019-10-25 김동민 Cushion brush for hair caught prevent
JP7315552B2 (en) * 2017-12-12 2023-07-26 コーニンクレッカ フィリップス エヌ ヴェ Brush head assembly and method of manufacturing same

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DE19738256A1 (en) * 1997-09-02 1999-03-11 Rueb F A Holding Gmbh Method and device for producing bristle fields and bristle field produced therewith
US6406099B2 (en) * 1999-12-22 2002-06-18 G.B. Boucherie N.V. Method to attach brush bristle tufts onto carriers made of thermoplastic material
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DE10303548A1 (en) * 2003-01-29 2004-08-12 M + C Schiffer Gmbh Toothbrush has bristles protruding through holes in naps in a thermoformed film forming the brush head surface and held in place by a rear part to form a composite assembly in the head
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WO2016008576A1 (en) * 2014-07-15 2016-01-21 Zahoransky Ag Carrier plate and brush, in particular toothbrush with carrier plate

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