JP2008000239A - Radial blade and its manufacturing method - Google Patents
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Description
本発明は、３６０度型歯ブラシのブラシヘッドの如き円筒状ブラシの作製等に使用されるディスク型の放射状羽根及びその製造方法に関する。 The present invention relates to a disk-shaped radial blade used for manufacturing a cylindrical brush such as a brush head of a 360-degree toothbrush and a method for manufacturing the same.
歯ブラシの一種として、特許文献１に記載されるような３６０度型歯ブラシが知られている。この歯ブラシは、ブラシハンドルの先端部に円筒形状のブラシヘッドを有している。円筒形状のブラシヘッドは、ディスク型の放射状羽根を中心線方向に積層することより構成されている。ディスク型放射状羽根の構造を図５に示す。 As a kind of toothbrush, a 360 degree toothbrush as described in Patent Document 1 is known. This toothbrush has a cylindrical brush head at the tip of the brush handle. The cylindrical brush head is configured by laminating disk-shaped radial blades in the center line direction. The structure of the disk-type radial blade is shown in FIG.
ディスク型の放射状羽根１０は、内側をブラシハンドルの先端部が貫通するディスク状で環状の溶着コア部１１と、溶着コア部１１の周方向全域から多数本の糸材が外周側へ延出して形成された放射状の羽根部１２とからなる。図５中の１３は環状コア部１１の内側に形成された貫通孔、１４は環状コア部１１の両面又は片面に一体的に形成されたスペーサー用の環状凸部である。そして、この放射状羽根は、例えば特許文献２に記載された方法により製造される。特許文献２に記載された放射状羽根の製造方法を図６〜図１０により説明する。 The disk-shaped radial blade 10 has a disk-shaped annular welding core portion 11 through which the tip of the brush handle penetrates, and a large number of yarn materials extending from the entire circumferential direction of the welding core portion 11 to the outer peripheral side. It consists of the formed radial blade | wing part 12. FIG. In FIG. 5, reference numeral 13 denotes a through hole formed inside the annular core portion 11, and reference numeral 14 denotes an annular convex portion for a spacer formed integrally on both sides or one side of the annular core portion 11. And this radial blade | wing is manufactured by the method described in patent document 2, for example. The manufacturing method of the radial blade | wing described in patent document 2 is demonstrated with reference to FIGS.
放射状羽根の製造装置は、図６に示すように、加工ベッドｂの上に配置された糸開き治具ｄ、糸押さえｅ、溶着ヘッドｆ及び押し切りポンチｇを具備している。加工ベッドｂは、所定本数の糸材を束ねて形成された糸束ａが貫通する糸束供給孔を有しており、その下に糸上げチャックｃを装備している。糸開き治具ｄは、環状の糸押さえｅの内側に同心状に組み合わされており、糸開き治具ｄ及び糸押さえｅ、溶着ヘッドｆ、並びに押し切りポンチｇは、図示されない駆動機構により、加工ベッドｂの貫通孔の真上に選択的に搬送される。 As shown in FIG. 6, the radial blade manufacturing apparatus includes a yarn opening jig d, a yarn presser e, a welding head f, and a push-off punch g arranged on a processing bed b. The processing bed b has a yarn bundle supply hole through which a yarn bundle a formed by bundling a predetermined number of yarn materials passes, and a yarn raising chuck c is provided below the hole. The yarn opening jig d is concentrically combined inside the annular yarn presser e, and the yarn opening jig d, the yarn presser e, the welding head f, and the push-off punch g are processed by a drive mechanism (not shown). It is selectively conveyed directly above the through hole of the bed b.
製造作業では、まず第１ステップとして、加工ベッドｂの供給孔に下から差し通された糸束ａを、加工ベッドｂの下方に設けられた糸上げチャックｃにより押し上げて、加工ベッドｂの上に所定長突出させる。 In the manufacturing operation, first, as a first step, the yarn bundle a inserted through the supply hole of the processing bed b from below is pushed up by a yarn raising chuck c provided below the processing bed b, and then the top of the processing bed b. Project for a predetermined length.
第２ステップとして、図７に示すように、糸束ａの突出部分の中心部に、下端面が円錐状に形成された糸開き治具ｄを押し付けることにより、その突出部分を周囲に開く。第３ステップとして、図８に示すように、糸開き治具ｄの外側に組み合わされた環状の糸押さえｅを下降させて、途中まで開いた糸材を加工ベッドｂの貫通孔周囲に押し付け、糸束ａの露出部分を周囲へ完全に開く。 As a second step, as shown in FIG. 7, a thread opening jig d whose lower end surface is formed in a conical shape is pressed against the center part of the projecting part of the yarn bundle a to open the projecting part to the periphery. As a third step, as shown in FIG. 8, the annular thread retainer e combined on the outside of the thread opening jig d is lowered, and the thread material that has been opened halfway is pressed around the through hole of the processing bed b, Open the exposed part of the yarn bundle a completely around.
第４ステップとして、図９に示すように、糸束ａの露出部分を糸押さえｅで放射状に開いたまま、糸開き治具ｄを上昇させて側方へ退避させ、代わりに溶着ヘッドｆを貫通孔の真上へ移動させて下降させ、放射状に開いた糸材の中心部周囲を環状に溶着する。最後に第５ステップとして、図１０に示すように、溶着ヘッドｆを上昇させて側方へ退避させ、代わりに押し切りポンチｇを貫通孔の真上へ移動させて下降させ、環状溶着部の内側を打ち抜くことにより糸束ａを分離する。 As a fourth step, as shown in FIG. 9, the yarn opening jig d is lifted and retracted sideways while the exposed portion of the yarn bundle a is opened radially by the yarn presser e, and the welding head f is replaced instead. It is moved down directly above the through hole, and is welded in an annular shape around the center of the radially open yarn material. Finally, as a fifth step, as shown in FIG. 10, the welding head f is raised and retracted to the side, and instead, the push-through punch g is moved to the position directly above the through-hole and lowered, , The yarn bundle a is separated.
こうして製造されるディスク型の放射状羽根１０は、前述したとおり、内側が貫通孔１３とされたディスク状で環状の溶着コア部１１と、溶着コア部１１の周方向全域から外周側へ多数本の糸材２１が延出して形成された放射状の羽根部１２とからなり、これをブラシハンドルの先端部に複数枚重ね合わせて嵌め込み固定することにより、３６０度型歯ブラシの円筒形状のブラシヘッドが構成される。 As described above, the disk-shaped radial blade 10 manufactured in this way has a disk-shaped and annular weld core portion 11 having an inner through-hole 13 and a large number of weld core portions 11 from the entire circumferential direction of the weld core portion 11 to the outer peripheral side. A cylindrical brush head of a 360-degree toothbrush is configured by a plurality of radial blades 12 formed by extending the thread material 21, and a plurality of these blades are overlapped and fixed to the tip of the brush handle. Is done.
ところで、このような放射状羽根は、３６０度型歯ブラシの円筒形状のブラシヘッド以外にも、工業用の各種円筒状ブラシに使用することが可能である。その場合、円筒状の芯部から外周側へ放射状に延出する糸材の密度を用途に応じて広範囲に変更することが要求されることになり、その要求に応えるためには、個々の放射状羽根の羽根部における糸材の密度を広範囲に変更することが必要となる。 Incidentally, such radial blades can be used for various industrial cylindrical brushes in addition to the cylindrical brush head of a 360-degree toothbrush. In that case, it will be required to change the density of the thread material radially extending from the cylindrical core portion to the outer peripheral side in a wide range according to the application. It is necessary to change the density of the thread material in the blade portion of the blade over a wide range.
しかしながら、これまでの放射状羽根においては、糸束ａの外径、より厳密には加工ベッドｂの供給孔の孔径によって羽根部における糸材の密度が画一的に決定されるという制約があった。その理由は次のとおりである。放射状羽根の製造装置の側からいえば、糸束ａを加工ベッドｂ上に供給するために当該ベッドに設けられた供給孔の内径は、容易には変えることができない。供給孔の内径は、糸束ａの直径（すなわち品種）だけでなく、加工ベッドｂの上に配置された糸開き治具ｄ、糸押さえｅ、溶着ヘッドｆ及び押し切りポンチｇなどの全ての構造に影響を与えるからである。このため、加工ベッドｂの供給孔を通過可能という点から糸材の上限本数が決まり、糸束ａの上限外径が決まる。その結果、糸束ａを構成する糸材の太さによって糸材の本数が一義的に固定されることになる。 However, the conventional radial blade has a restriction that the density of the yarn material in the blade portion is uniformly determined by the outer diameter of the yarn bundle a, more precisely, the diameter of the supply hole of the processing bed b. . The reason is as follows. From the radial blade manufacturing device side, the inner diameter of the supply hole provided in the bed for supplying the yarn bundle a onto the processing bed b cannot be easily changed. The inner diameter of the supply hole is not only the diameter (that is, the type) of the yarn bundle a, but all structures such as the yarn opening jig d, the yarn presser e, the welding head f, and the press-cut punch g arranged on the processing bed b. It is because it affects. For this reason, the upper limit number of yarn materials is determined from the point that it can pass through the supply hole of the processing bed b, and the upper limit outer diameter of the yarn bundle a is determined. As a result, the number of yarn materials is uniquely fixed depending on the thickness of the yarn material constituting the yarn bundle a.
具体的に説明すると、糸束ａが通過する供給孔の内径Ｄを３．２ｍｍ、糸材の直径ｄを０．０９ｍｍとすると、供給孔を実際に通過できる糸材の本数は最大で６００〜７００本である。糸材の直径ｄが０．１２ｍｍの場合は、その本数は４００〜５００本である。これらの本数は、糸束ａを構成する糸材の本数となる。この本数を一般化すると、糸材の直径ｄの一般的な範囲は０．０７〜０．１５ｍｍであるから、供給孔の面積をＳ（ｍｍ2 ）、糸材の断面積をＫ（ｍｍ2 ）とすると、供給孔を通過できる本数は最も多い０．０７ｍｍの場合でも（Ｓ／Ｋ）・（２／３）本に達することはなく、通常は供給孔における糸束ａのスムーズな通過のために（Ｓ／Ｋ）・（１／３〜１／２）本である。 More specifically, if the inner diameter D of the supply hole through which the yarn bundle a passes is 3.2 mm and the diameter d of the yarn material is 0.09 mm, the maximum number of yarn materials that can actually pass through the supply hole is 600 to 600. 700. When the diameter d of the thread material is 0.12 mm, the number is 400 to 500. These numbers are the number of yarn materials constituting the yarn bundle a. When this number is generalized, since the general range of the diameter d of the thread material is 0.07 to 0.15 mm, the area of the supply hole is S (mm 2 ), and the cross-sectional area of the thread material is K (mm 2 ), The number of the thread that can pass through the supply hole does not reach (S / K) · (2/3) even in the case of 0.07 mm, which is the largest, and usually the thread bundle a smoothly passes through the supply hole. Therefore, (S / K) · (1/3 to 1/2).
したがって、糸束ａを構成する糸材の最大本数も（Ｓ／Ｋ）・（２／３）本に達することはなく、通常は（Ｓ／Ｋ）・（１／３〜１／２）本であり、その結果として、放射状羽根１０の羽根部１２における糸材の本数も（Ｓ／Ｋ）・（２／３）本に達することはなく、通常は（Ｓ／Ｋ）・（１／３〜１／２）本となる。ちなみに、（Ｓ／Ｋ）は供給孔の面積を糸材の断面積で単純に除算した物理的な限界挿入本数（供給孔内で糸材が変形して隙間なく充填されたと仮定したときの本数）である。 Therefore, the maximum number of yarn materials constituting the yarn bundle a does not reach (S / K) · (2/3), and usually (S / K) · (1/3 to 1/2). As a result, the number of yarn materials in the blade portion 12 of the radial blade 10 does not reach (S / K) · (2/3), and usually (S / K) · (1/3). ~ 1/2) book. By the way, (S / K) is the physical limit insertion number obtained by simply dividing the area of the supply hole by the cross-sectional area of the thread material (the number when assuming that the thread material is deformed and filled without gaps in the supply hole) ).
このように、従来の放射状羽根１０においては、加工ベッドｂの糸束供給孔の面積Ｓによって、羽根部１２における糸材の密度が画一的に決定されるという制約があった。すなわち、放射状羽根の用途は様々であり、それらの用途に応じて糸材の密度についても様々なものが要求されるところ、従来の放射状羽根はこのような要求に応えることができなかったのである。このため用途が制約を受ける結果になっていた。 Thus, in the conventional radial blade | wing 10, there existed a restriction | limiting that the density of the thread material in the blade | wing part 12 was determined uniformly by the area S of the yarn bundle supply hole of the process bed b. That is, there are various uses of the radial blades, and various things are required for the density of the yarn material according to those uses. However, the conventional radial blades could not meet such demands. . For this reason, the use was limited.
また別の問題として、溶着コア部１１の機械的強度が低く、製造過程でこの部分がしばしば破断し、このことが、製造歩留りを低下させる大きな原因になっていた。 As another problem, the mechanical strength of the welded core portion 11 is low, and this portion often breaks during the manufacturing process, which has been a major cause of decreasing the manufacturing yield.
本発明の目的は、製造装置による制約を受けることなく羽根部における糸材の密度を広範囲に増加させることができ、しかも溶着コア部の機械的強度を高めることができる放射状羽根を提供することにある。 An object of the present invention is to provide a radial blade that can increase the density of the thread material in the blade portion over a wide range without being restricted by the manufacturing apparatus, and can increase the mechanical strength of the welded core portion. is there.
本発明の別の目的は、そのような高密度、高強度の放射状羽根を簡単に製造できる放射状羽根の製造方法を提供することにある。 Another object of the present invention is to provide a method for manufacturing a radial blade that can easily manufacture such a high-density, high-strength radial blade.
上記目的を達成するために、本発明者らは放射状羽根をコア部で一体化しつつ２重、３重に重ねて製造する手法を考えだした。すなわち、羽根部における糸材の密度を増やすために、本発明者らはテーブル上に突出させた糸束を周囲へ開き、中心部周囲を環状に溶着して糸束を切り離した後、形成された放射状羽根を製造位置に固定したまま、環状の溶着コア部の内側に形成された貫通孔を通して再度糸束を環状羽根の上に突出させ、その糸束を再度周囲へ開いて中心部周囲を環状に溶着し、溶着部内側を打ち抜いて糸束を切り離す手法を考えだした。 In order to achieve the above-mentioned object, the present inventors have devised a method of manufacturing the radial blades in a double or triple manner while integrating them at the core portion. That is, in order to increase the density of the yarn material in the blade portion, the present inventors formed the yarn bundle projected on the table to the periphery, welded in a ring shape around the center portion, and then separated from the yarn bundle. With the radial blades fixed at the manufacturing position, the yarn bundle is again projected onto the annular blade through the through-hole formed inside the annular welded core portion, and the yarn bundle is reopened around the center portion to surround the center portion. We have devised a method of welding in a ring and punching out the inside of the weld to separate the yarn bundle.
この手法によると、放射状羽根の製造位置において、溶着コア部で一体化した二重構造放射状羽根を製造でき、羽根部における糸束の密度を２倍に増加させることができる。更に、この操作を繰り返すならば、溶着コア部で一体化した三重構造、四重構造の放射状羽根も製造でき、羽根部における糸束の密度を何倍にも増加させることができる。すなわち、この手法によれば、従来は製造できなかった高糸密度の放射状羽根を何種類も簡単に製造することができるのである。 According to this method, the double-structured radial blade integrated at the weld core portion can be manufactured at the manufacturing position of the radial blade, and the density of the yarn bundle in the blade portion can be doubled. Furthermore, if this operation is repeated, triple and quadruple radial blades integrated at the weld core can be manufactured, and the density of the yarn bundle at the blades can be increased many times. In other words, according to this method, it is possible to easily manufacture many types of high-density radial blades that could not be manufactured conventionally.
本発明はかかる知見に基づいて完成されたものであり、その放射状羽根は、中心部に貫通孔が設けられたディスク状で環状の溶着コア部と、溶着コア部の周方向全域から多数本の糸材が外周側へ延出して形成された放射状の羽根部とを有する放射状羽根において、前記溶着コア部が複数の薄型コア部が積層一体化して形成されており、複数の薄型コア部の各周方向全域から外周側へ放射状に延出した多数本の糸材が合体して前記羽根部が形成されていることを構造上の第１の特徴とする。 The present invention has been completed on the basis of such knowledge, and the radial blade has a disk-like and annular weld core portion with a through hole in the center, and a large number of radial blades from the entire circumferential direction of the weld core portion. In a radial blade having a radial blade portion formed by extending a thread material to the outer peripheral side, the welding core portion is formed by laminating and integrating a plurality of thin core portions, and each of the plurality of thin core portions A first structural feature is that a plurality of yarn materials radially extending from the entire circumferential direction to the outer peripheral side are combined to form the blade portion.
本発明の放射状羽根は又、中心部に貫通孔が設けられたディスク状で環状の溶着コア部と、溶着コア部の周方向全域から多数本の糸材が外周側へ延出して形成された放射状の羽根部とを有する放射状羽根であって、多数本の糸材を束ねて構成された糸束を加工ベッドの供給孔からベッド上へ突出させ、その突出部を周囲へ放射状に押し開いて中心部周囲を環状に溶着すると共に、糸束を分離するべく溶着部の内側を環状に切断することにより製造される放射状羽根において、前記供給孔の面積をＳ（ｍｍ2 ）、前記糸材の断面積をＫ（ｍｍ2 ）として、糸材の本数が（Ｓ／Ｋ）・（２／３）以上であることを構造上の第２の特徴とする。 The radial blade of the present invention is also formed by a disk-like annular weld core portion having a through hole in the center and a large number of yarn members extending from the entire circumferential direction of the weld core portion to the outer peripheral side. A radial blade having a radial blade portion, and a yarn bundle configured by bundling a large number of yarn materials is projected from the supply hole of the processing bed onto the bed, and the protruding portion is radially opened to the periphery. In the radial blade manufactured by annularly welding the periphery of the center portion and annularly cutting the inside of the welded portion so as to separate the yarn bundle, the area of the supply hole is S (mm 2 ), The second feature of the structure is that the cross-sectional area is K (mm 2 ) and the number of yarn materials is (S / K) · (2/3) or more.
また、本発明の放射状羽根の製造方法は、糸束の端部を周囲へ放射状に押し開いてその中心部周囲を環状に溶着した後、糸束を分離するべく溶着部の内側を環状に切断することにより、環状の溶着部から多数本の糸材が外周側へ放射状に延出した第１の放射状羽根を形成する放射状羽根の一次形成工程と、形成された放射状羽根の溶着部内側に形成された貫通孔に糸束を刺し通して突出させる糸束挿入工程と、糸束の突出端部を周囲へ放射状に押し開いてその中心部周囲を環状に溶着した後、糸束を分離するべく溶着部の内側を環状に切断することにより、前記溶着部に一体化された環状の溶着部から多数本の糸材が外周側へ放射状に延出した第２の放射状羽根を形成する放射状羽根の再形成工程とを包含している。 Also, the radial blade manufacturing method of the present invention is such that the end portion of the yarn bundle is radially opened to the periphery and the periphery of the center portion is welded in an annular shape, and then the inside of the welded portion is annularly cut to separate the yarn bundle. The primary forming step of the radial blades forming the first radial blades in which a large number of yarn materials radially extend from the annular welded portion to the outer peripheral side, and the inside of the formed radial blade welded portion A thread bundle insertion step of inserting a thread bundle through the formed through-hole and projecting it, and pushing the projecting end of the thread bundle radially outward to weld the ring around the center, and then separating the thread bundle By cutting the inside of the welded portion into a ring shape, a radial blade that forms a second radial blade in which a large number of yarn materials radially extend from the annular welded portion integrated with the welded portion to the outer peripheral side. A reforming step.
本発明の製造方法においては、溶着コア部で一体化した２重構造の放射状羽根が製造され、従来の一重構造の放射状羽根に比して羽根部における糸材の密度を２倍に増加させることができる。糸束挿入工程と放射状羽根の再形成工程とを複数回繰り返すならば、コア部で一体化した３重構造、４重構造・・・の放射状羽根が製造され、羽根部における糸材の密度を何倍にも増加させることができる。 In the manufacturing method of the present invention, a radial wing having a double structure integrated with a welding core portion is manufactured, and the density of the thread material in the wing portion is doubled as compared with a conventional single structure radial wing. Can do. If the yarn bundle insertion step and the radial blade re-forming step are repeated a plurality of times, a triple structure, a quadruple structure, etc. radial blade integrated in the core portion is manufactured, and the density of the yarn material in the blade portion is reduced. It can be increased many times.
溶着部の内側を環状に切断する際にその切断孔径を糸束の直径より若干大きくすることが望まれる。この孔径は溶着コア部の面積を確保するために小さい方がよいが、糸束分離のために糸束の直径より小さくすることはできない。そこで孔径を糸束の直径より若干大きくする。これにより、溶着コア部の機械的強度を低下させることなく、コア部内側の貫通孔に糸束を通す操作が容易となる。 When cutting the inside of the welded portion in an annular shape, it is desirable that the diameter of the cut hole is slightly larger than the diameter of the yarn bundle. The hole diameter is preferably small in order to secure the area of the weld core part, but cannot be smaller than the diameter of the yarn bundle for yarn bundle separation. Therefore, the hole diameter is made slightly larger than the diameter of the yarn bundle. This facilitates the operation of passing the yarn bundle through the through hole inside the core portion without reducing the mechanical strength of the welded core portion.
本発明の放射状羽根は、環状の溶着コア部の外側に形成される放射状の羽根部における糸材が従来の製造限界より高密度であり、しかも、その糸材の密度を何段階にも高めることができる。したがって、用途に応じた糸材密度を選択でき、その用途を飛躍的に拡大することができる。また、その放射状羽根を中心線方向に重ねて円筒形状の３６０度型ブラシを製造する場合に放射状羽根の重ね合わせ枚数を減らせることができ、その分、製造能率を上げることができる。 In the radial blade of the present invention, the yarn material in the radial blade portion formed outside the annular weld core portion has a higher density than the conventional production limit, and the yarn material density is increased in many steps. Can do. Therefore, the thread density according to the use can be selected, and the use can be dramatically expanded. Further, when a cylindrical 360-degree brush is manufactured by overlapping the radial blades in the center line direction, the number of overlapping radial blades can be reduced, and the production efficiency can be increased accordingly.
また、本発明の放射状羽根の製造方法は、羽根部における糸材が高密度の放射状羽根を定位置で簡単かつ効率的に製造することができる。また、その密度を何段階にも簡単に変更することができる。したがって、用途に適した糸材密度の放射状羽根を経済的に製造でき、市場に安価に提供することができる。 Moreover, the manufacturing method of the radial blade | wing of this invention can manufacture the radial blade | wing with a high density in the blade | wing part easily and efficiently in a fixed position. Moreover, the density can be easily changed in any number of steps. Therefore, a radial blade having a thread material density suitable for the application can be produced economically and provided to the market at a low cost.
以下に本発明の実施形態を図面に基づいて説明する。図１は本発明の一実施形態を示す放射状羽根の平面図（ａ）及び縦断側面図（ｂ）である Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view (a) and a longitudinal side view (b) of a radial blade showing an embodiment of the present invention.
本実施形態の放射状羽根１０は、ディスク状で環状の溶着コア部１１と、溶着コア部１１の周方向全域から多数本の糸材が外周側へ延出して形成された放射状の羽根部１２とからなる。この放射状羽根１０は、基本となる薄型の放射状羽根１０’を２枚重ね合わせることにより構成されており、放射状羽根１０における糸材の本数は、薄型の放射状羽根１０’における糸材の本数の２倍である。 The radial blade 10 of the present embodiment includes a disc-shaped and annular weld core portion 11, and a radial blade portion 12 formed by extending a large number of yarn materials from the entire circumferential direction of the weld core portion 11 to the outer peripheral side. Consists of. This radial blade 10 is configured by overlapping two basic thin radial blades 10 ′, and the number of yarn materials in the radial blade 10 is 2 of the number of yarn materials in the thin radial blade 10 ′. Is double.
より具体的に説明すると、放射状羽根１０の溶着コア部１１は、２枚の放射状羽根１０’，１０’の溶着コア部１１’，１１’を２枚重ねて全体を溶着し一体化することにより構成されており、また放射状羽根１０の羽根部１２は、２枚の放射状羽根１０’，１０’の羽根部１２’，１２’、すなわち２枚の環状コア部１１’，１１’の周方向全域から外周側へ延出したそれそれの放射状の糸材集合体が合体することにより構成されている。 More specifically, the welding core portion 11 of the radial blade 10 is obtained by welding and integrating the two welding core portions 11 ′ and 11 ′ of the two radial blades 10 ′ and 10 ′. The blade portion 12 of the radial blade 10 is configured so that the blade portions 12 'and 12' of the two radial blades 10 'and 10', that is, the entire circumferential direction of the two annular core portions 11 'and 11'. Each of the radial thread material assemblies extending from the outer periphery to the outer peripheral side is combined.
環状の溶着コア部１１の内側には、円形の貫通孔１３が形成されている。溶着コア部１１の両面には、貫通孔１３を包囲するように円形の凸部１４，１４が一体的に形成されている。凸部１４，１４は、放射状羽根１０を軸方向に重ねたときのスペーサであり、その断面形状はここでは半円形とされている。 A circular through hole 13 is formed inside the annular welded core portion 11. On both surfaces of the welded core portion 11, circular convex portions 14 and 14 are integrally formed so as to surround the through hole 13. The convex portions 14 and 14 are spacers when the radial blades 10 are overlapped in the axial direction, and the cross-sectional shape thereof is a semicircular shape here.
本実施形態の放射状羽根１０は、基本となる薄型の放射状羽根１０’を２枚重ね合わせた２重構造であるが、３枚以上重ねあわせた３重構造、４重構造、更にはそれ以上の多重構造も可能である。重合数が増加するにしたがって、放射状羽根１０の羽根部１２における糸材の本数は３倍、４倍と増加する。 The radial blade 10 according to the present embodiment has a double structure in which two thin thin radial blades 10 ′ as a base are overlapped, but a triple structure, a triple structure in which three or more are overlapped, or even more. Multiple structures are possible. As the number of polymerizations increases, the number of yarn materials in the blade portion 12 of the radial blade 10 increases by three times and four times.
また、本実施形態の放射状羽根１０では、基本となる複数枚の放射状羽根１０’，１０’の羽根部１２’，１２’が中心線方向で「く」の字状に開いて分離しているが、これは放射状羽根１０の積層構造を強調するためであり、溶着時の羽根部１２’の押さえ量の加減により同一平面上に形成することもできるし、任意の角度で開かせることもできる。 Further, in the radial blade 10 of the present embodiment, the blade portions 12 ′ and 12 ′ of a plurality of basic radial blades 10 ′ and 10 ′ are separated in the shape of a “<” in the center line direction. However, this is to emphasize the laminated structure of the radial blades 10 and can be formed on the same plane by adjusting the pressing amount of the blade portion 12 ′ during welding, or can be opened at an arbitrary angle. .
図２〜図４は上記放射状羽根の製造方法及び製造装置の説明図である。 2-4 is explanatory drawing of the manufacturing method and manufacturing apparatus of the said radial blade | wing.
放射状羽根の製造装置は、図２〜図４に示すように、ナイロン樹脂系の糸材２１を束ねて形成された糸束２０から、放射状羽根１０を製造する。この製造のために、製造装置は水平な加工ベッド３０と、その上に設けられた円筒状の溶着ヘッド４０、リング状の糸押さえ５０及び切断刃６０とを備えている。 As shown in FIGS. 2 to 4, the radial blade manufacturing device manufactures the radial blade 10 from a yarn bundle 20 formed by bundling nylon resin-based yarn materials 21. For this production, the production apparatus includes a horizontal processing bed 30 and a cylindrical welding head 40, a ring-shaped thread presser 50 and a cutting blade 60 provided thereon.
加工ベッド３０は、糸束２０が通過する垂直な糸材供給孔を有すると共に、供給孔の周囲に供給孔に接して設けられた環状刃部を表面に有している。加工ベッド３０の下には、糸束２０を押し上げる押し上げチャック（図示せず）が設けられている。 The processing bed 30 has a vertical thread material supply hole through which the yarn bundle 20 passes, and an annular blade portion provided around the supply hole in contact with the supply hole on the surface. A push-up chuck (not shown) that pushes up the yarn bundle 20 is provided under the processing bed 30.
円筒状の溶着ヘッド４０は、加工ベッド３０の貫通孔上に同心状に垂直配置されており、図示されない駆動機構により中心線方向に昇降駆動される。この溶着ヘッド４０は超音波振動による溶着を行う溶着ホーンであり、図示されない振動子により駆動される。溶着ヘッド４０の中心部に設けられた貫通孔は空気孔であり、糸束２０を周囲へ開くのに使用される。溶着ヘッド４０の先端部は熱切断ポンチを兼ねており、先端面の内周縁部は加工ベッド３０の貫通孔周囲に形成された環状刃部と組み合わさって、糸束２０を分離するための切断刃を形成する。 The cylindrical welding head 40 is vertically arranged concentrically on the through hole of the processing bed 30 and is driven up and down in the direction of the center line by a driving mechanism (not shown). The welding head 40 is a welding horn that performs welding by ultrasonic vibration, and is driven by a vibrator (not shown). A through hole provided at the center of the welding head 40 is an air hole and is used to open the yarn bundle 20 to the periphery. The front end of the welding head 40 also serves as a thermal cutting punch, and the inner peripheral edge of the front end surface is combined with an annular blade formed around the through hole of the processing bed 30 to cut the yarn bundle 20. Forming a blade.
リング状の糸押さえ５０は、溶着ヘッド４０の外側に同心状に嵌合しており、中心線方向に溶着ヘッド４０とは独立に昇降駆動される。切断刃６０は、溶着ヘッド４０が上方の退避位置にあるときにその下側を水平方向に移動する水平刃であり、糸束２０の先端固着部を切断除去するのに使用される。 The ring-shaped thread retainer 50 is concentrically fitted to the outside of the welding head 40 and is driven up and down independently of the welding head 40 in the center line direction. The cutting blade 60 is a horizontal blade that moves in the horizontal direction below when the welding head 40 is in the upper retracted position, and is used to cut and remove the tip fixing portion of the yarn bundle 20.
操業では、まず図２（ａ）に示すように、加工ベッド３０上の溶着ヘッド４０及び糸押さえ５０が上方の退避位置にある状態で、加工ベッド３０の供給孔に糸束２０が下側（裏面側）から上側（表面側）へ刺し通され、加工ベッド３０の下に設けられた押し上げチャックによる押し上げで、加工ベッド３０の上に所定量突出する。突出量は製造する放射状羽根１０の半径に応じて設定される。 In operation, first, as shown in FIG. 2A, the yarn bundle 20 is placed in the supply hole of the processing bed 30 on the lower side (with the welding head 40 and the thread presser 50 on the processing bed 30 in the upper retracted position). It is pierced from the back surface side to the upper side (front surface side) and protrudes by a predetermined amount on the processing bed 30 by being pushed up by a push-up chuck provided under the processing bed 30. The protrusion amount is set according to the radius of the radial blade 10 to be manufactured.
ここで、糸束２０はナイロン樹脂を主成分とする所定本数の糸材２１を円形に束ねて構成されている。糸束２０の直径ｄは加工ベッド３０の供給孔Ｄの内径と同一かやや小であり、糸束２０を構成する糸材２１の本数は、供給孔の内径に応じて決まる。具体的には、前述したとおり、糸材の直径ｄが０．０９ｍｍ、供給孔の内径Ｄが３．２ｍｍの場合、糸材２１の本数は約７００本である。糸材２１の直径ｄが０．１２ｍｍの場合は、その本数は約５００本である。糸材の直径ｄは通常０．０７〜０．１５ｍｍであり、用途に応じて選択される。 Here, the yarn bundle 20 is configured by bundling a predetermined number of yarn materials 21 mainly composed of nylon resin in a circular shape. The diameter d of the yarn bundle 20 is the same as or slightly smaller than the inner diameter of the supply hole D of the processing bed 30, and the number of yarn materials 21 constituting the yarn bundle 20 is determined according to the inner diameter of the supply hole. Specifically, as described above, when the diameter d of the thread material is 0.09 mm and the inner diameter D of the supply hole is 3.2 mm, the number of the thread materials 21 is about 700. When the diameter d of the thread material 21 is 0.12 mm, the number is about 500. The diameter d of the thread material is usually 0.07 to 0.15 mm, and is selected according to the application.
糸束２０が加工ベッド３０の上に所定量突出すると、図２（ｂ）に示すように、その糸束２０の先端部が切断刃６０により切断除去される。糸束２０の先端部除去が終わると、図２（ｃ）に示すように、溶着ヘッド４０が空気を下方へ吹き出し且つ振動しなががら下降すると共に、これに同期して外側の糸押さえ５０も下降する。 When the yarn bundle 20 protrudes on the processing bed 30 by a predetermined amount, the tip end portion of the yarn bundle 20 is cut and removed by the cutting blade 60 as shown in FIG. When the removal of the tip of the yarn bundle 20 is finished, as shown in FIG. 2 (c), the welding head 40 blows out air and descends while vibrating, and in synchronization with this, the outer yarn presser 50 is synchronized. Also descends.
溶着ヘッド４０からの吹き出し空気は下方の糸束２０の突出部分の中心部に衝突する。これにより、糸束２０の突出部分における糸材２１は周囲へ均等に開く。この状態で溶着ヘッド４０及び糸押さえ５０が下降を続け、周囲へ開いた糸材２１を加工ベッド３０の表面（供給孔の周囲）に押し付ける。これにより、糸束２０の突出部分における糸材２１は、図２（ｄ）に示すように、周囲へ完全に開き放射状になる。溶着ヘッド４０の振動は糸材２１を周囲へ均等かつスムーズに開放するのに寄与する。 The air blown from the welding head 40 collides with the center of the protruding portion of the lower yarn bundle 20. As a result, the yarn material 21 in the protruding portion of the yarn bundle 20 opens evenly around. In this state, the welding head 40 and the thread presser 50 continue to descend, and the thread material 21 opened to the periphery is pressed against the surface of the processing bed 30 (around the supply hole). As a result, the yarn material 21 at the protruding portion of the yarn bundle 20 is completely opened radially to the periphery as shown in FIG. The vibration of the welding head 40 contributes to opening the yarn material 21 evenly and smoothly to the surroundings.
溶着ヘッド４０による糸材２１の開放が終わると、その開いた糸束２１が環状の糸押さえ５０により固定される。これと共に、溶着ヘッド４０が、先端の環状溶着面にて、放射状に開いた糸材２１の中心部周囲を、供給孔の周囲との間に挟んで加圧し、その中心部周囲を環状に溶着する。同時に、溶着ヘッド４０の先端面の内周縁部が、加工ベッド３０の貫通孔周囲に形成された環状刃部に向かって押圧されることにより、環状溶着部の内側が円形に切断除去され、糸束２０が分離される。分離された糸束２０は、先端部が加工ベッド３０の供給孔に挿入された状態にある。 When the opening of the yarn material 21 by the welding head 40 is finished, the opened yarn bundle 21 is fixed by the annular yarn presser 50. At the same time, the welding head 40 presses and presses the periphery of the central portion of the thread material 21 that is radially opened at the tip of the annular welding surface with the periphery of the supply hole, and the periphery of the central portion is welded in an annular shape. To do. At the same time, the inner peripheral edge portion of the front end surface of the welding head 40 is pressed toward the annular blade portion formed around the through hole of the processing bed 30, whereby the inside of the annular welding portion is cut and removed in a circular shape. The bundle 20 is separated. The separated yarn bundle 20 is in a state where the tip portion is inserted into the supply hole of the processing bed 30.
こうして、加工ベッド３０上の定位置において、１枚目の薄い放射状羽根１０’が製造される。放射状羽根１０’は環状の溶着コア部と、その周囲全体から所定本数の糸材２１が周囲全方向へ延出して形成された放射状の羽根部とからなる。羽根部における糸材２１の本数は、前述したとおり、糸材の直径ｄが０．０９ｍｍ、供給孔の内径Ｄが３．２ｍｍの場合は約７００本であり、糸材２１の直径ｄが０．１２ｍｍの場合は約５００本である。環状コア部の内側に形成される円形貫通孔の内径は、加工ベッド３０における貫通孔の内径、すわち糸束２０の直径と同じかこれより僅かに大となる。 Thus, the first thin radial blade 10 ′ is manufactured at a fixed position on the processing bed 30. The radial blade 10 ′ includes an annular weld core portion and a radial blade portion formed by extending a predetermined number of yarn materials 21 from the entire periphery in all directions. As described above, the number of the thread materials 21 in the blade portion is about 700 when the diameter d of the thread material is 0.09 mm and the inner diameter D of the supply hole is 3.2 mm, and the diameter d of the thread material 21 is 0. In the case of 12 mm, the number is about 500. The inner diameter of the circular through hole formed inside the annular core portion is the same as or slightly larger than the inner diameter of the through hole in the processing bed 30, that is, the diameter of the yarn bundle 20.
加工ベッド３０上の定位置において１枚目の薄い放射状羽根１０’が製造されると、図３（ａ）に示すように、その放射状羽根１０’を糸押さえ５０で定位置に固定したまま、溶着ヘッド４０のみが上方の退避位置へ向かって上昇する。溶着ヘッド４０が上方の退避位置に戻ると、図３（ｂ）に示すように、糸束２０が再度上昇し、１枚目の放射状羽根１０’の貫通孔を通って加工ベッド３０の上に所定量突出し、その後、先端部（溶融固着部）が切断刃６０により切断除去される。放射状羽根１０’の貫通孔の内径は、加工ベッド３０における貫通孔の内径、すわち糸束２０の直径と同じかこれより僅かに大であるので、糸束２０はその貫通孔をスムーズに通過する。 When the first thin radial blade 10 ′ is manufactured at a fixed position on the processing bed 30, the radial blade 10 ′ is fixed at the fixed position by the thread retainer 50 as shown in FIG. Only the welding head 40 is raised toward the upper retracted position. When the welding head 40 returns to the upper retracted position, as shown in FIG. 3 (b), the yarn bundle 20 rises again, and passes over the through-hole of the first radial blade 10 'and onto the processing bed 30. The tip protrudes by a predetermined amount, and then the tip (melt-fixed portion) is cut and removed by the cutting blade 60. Since the inner diameter of the through hole of the radial blade 10 ′ is the same as or slightly larger than the inner diameter of the through hole in the processing bed 30, that is, the diameter of the yarn bundle 20, the yarn bundle 20 smoothly passes through the through hole. To do.
糸束２０の先端部除去が終わると、図３（ｃ）（ｄ）に示すように、糸押さえ５０が上方の退避位置に戻る。糸押さえ５０が上方の退避位置に戻ると、図４（ａ）（ｂ）に示すように、再度、溶着ヘッド４０及び糸押さえ５０が下降する。この下降により、溶着ヘッド４０にて糸束２０の突出部における糸材２１が周囲へ開かれ、その中心部周囲が下方に押圧される。そして、周囲に開いた糸材２１が糸押さえ５０にて下方に押圧されて放射状に固定された状態で、中心部周囲が溶着ヘッド４０にて環状に溶着される。また、環状溶着部の内側が円形に切断され、糸束２０が分離されると共に、環状溶着部の内側に円形の貫通孔が形成される。 When removal of the tip of the yarn bundle 20 is finished, the yarn retainer 50 returns to the upper retracted position, as shown in FIGS. When the thread retainer 50 returns to the upper retracted position, the welding head 40 and the thread retainer 50 are lowered again as shown in FIGS. By this descending, the yarn material 21 at the protruding portion of the yarn bundle 20 is opened to the periphery by the welding head 40, and the periphery of the center portion is pressed downward. Then, the periphery of the central portion is welded in an annular shape by the welding head 40 in a state where the thread material 21 opened to the periphery is pressed downward by the thread presser 50 and fixed radially. Further, the inner side of the annular welded portion is cut into a circle, the yarn bundle 20 is separated, and a circular through hole is formed inside the annular welded portion.
溶着及び切断が終わると、図４（ｃ）（ｄ）に示すように、溶着ヘッド４０及び糸押さえ５０が同期して上方の退避位置へ戻る。 When the welding and cutting are finished, the welding head 40 and the thread presser 50 are synchronously returned to the upper retracted position, as shown in FIGS.
これにより、加工ベッド３０上の定位置において、１枚目の放射状羽根１０’の上に２枚目の放射状羽根１０’が重ねて固着され、製品である二重構造の放射状羽根１０が製造される。すなわち、１枚目の放射状羽根１０’の溶着コア部の上に２枚目の放射状羽根１０’の溶着コア部が重なり溶着により一体化されることにより、放射状羽根１０の環状コア部１１が形成される。２枚目の放射状羽根１０’の溶着コア部周囲の羽根部は、放射状羽根１０’の溶着コア部周囲の羽根部と合体して、放射状羽根１０の羽根部１２を形成する。 As a result, at a fixed position on the processing bed 30, the second radial blade 10 ′ is overlapped and fixed on the first radial blade 10 ′, and the dual-structure radial blade 10 as a product is manufactured. The That is, the annular core portion 11 of the radial blade 10 is formed by overlapping the weld core portion of the second radial blade 10 ′ on the weld core portion of the first radial blade 10 ′ by overlapping welding. Is done. The blade portion around the weld core portion of the second radial blade 10 ′ is combined with the blade portion around the weld core portion of the radial blade 10 ′ to form the blade portion 12 of the radial blade 10.
羽根部１２における糸材２１の本数は従来の２倍であり、糸材の直径ｄが０．０９ｍｍ、供給孔の内径Ｄが３．２ｍｍの場合は約１３００本前後となり、糸材２１の直径ｄが０．１２ｍｍの場合は約９００本前後となる。これは、糸材２１の断面積をＫ（ｍｍ2 ）、前記供給孔の面積をＳ（ｍｍ2 ）とすると（Ｓ／Ｋ）・（２／３）以上となる。 The number of yarn materials 21 in the blade portion 12 is twice that of the prior art. When the yarn material diameter d is 0.09 mm and the inner diameter D of the supply hole is 3.2 mm, the number of yarn materials 21 is about 1300. When d is 0.12 mm, the number is about 900. This is equal to or greater than (S / K) · (2/3) where K (mm 2 ) is the cross-sectional area of the thread material 21 and S (mm 2 ) is the area of the supply hole.
加工ベッド３０上の定位置において製造された放射状羽根１０は加工ベッド３０上から排出される。この排出を容易ならしめるために、糸束２０が若干下がり、その放射状羽根１０から分離する〔図４（ｄ）〕。 The radial blade 10 manufactured at a fixed position on the processing bed 30 is discharged from the processing bed 30. In order to facilitate this discharge, the yarn bundle 20 is slightly lowered and separated from the radial blades 10 (FIG. 4D).
以上の工程を繰り返すことにより、従来の２倍の糸材密度をもつ放射状羽根１０が自動で連続的に製造される。図３（ａ）〜図４（ｂ）の工程を更に繰り返すならば、製造される放射状羽根１０は三重構造、四重構造となり、羽根部１２における糸材２１の本数は従来の３倍、４倍となり、用途に応じて自由に増加させることができる。ちなみに、三重構造の場合、糸材２１の本数は糸材の直径ｄが０．０９ｍｍ、貫通孔の内径Ｄが３．２ｍｍの場合は約２１００本となり、糸材２１の直径ｄが０．１２ｍｍの場合は約１５００本となる。糸材２１の断面積をＫ（ｍｍ2 ）、前記貫通孔の面積をＳ（ｍｍ2 ）とすると、これも又（Ｓ／Ｋ）・（２／３）以上である。 By repeating the above steps, the radial blades 10 having twice the density of the conventional yarn material are automatically and continuously manufactured. If the process of FIG. 3 (a)-FIG.4 (b) is repeated further, the radial blade 10 manufactured will become a triple structure and a quadruple structure, and the number of the thread materials 21 in the blade | wing part 12 is 3 times the conventional, 4 It can be doubled and increased freely according to the application. Incidentally, in the case of the triple structure, the number of the thread materials 21 is about 2100 when the diameter d of the thread material is 0.09 mm and the inner diameter D of the through hole is 3.2 mm, and the diameter d of the thread material 21 is 0.12 mm. In this case, the number is about 1500. If the cross-sectional area of the thread material 21 is K (mm 2 ) and the area of the through hole is S (mm 2 ), this is also (S / K) · (2/3) or more.
また、放射状羽根１０の溶着コア部１１は、重ね合わせ溶着毎に厚くなり、機械的強度が向上し、同部破損による歩留り低下が激減する。ただ、溶着コア部１１の厚みは加圧溶着で形成されるので、２枚重ねても２倍にはならず、その増加は僅かである。 Moreover, the welding core part 11 of the radial blade | wing 10 becomes thick for every overlap welding, a mechanical strength improves, and the yield fall by the same part damage reduces drastically. However, since the thickness of the weld core portion 11 is formed by pressure welding, even if two sheets are stacked, the thickness is not doubled, and the increase is slight.
溶着コア部１１の両面（片面でもよい）に形成される円形の凸部１４，１４（図１）は溶着時に同時形成される。上の放射状羽根１０’を溶着するとき、糸押さえ５０による糸材の押さえ量を加減することにより、上の放射状羽根１０’の羽根部を下の放射状羽根１０’の羽根部と同一平面内に形成したり、中心線方向に「く」の字状に開いて形成することもできる。 The circular convex portions 14 and 14 (FIG. 1) formed on both surfaces (or one surface) of the weld core portion 11 are simultaneously formed at the time of welding. When the upper radial blade 10 ′ is welded, the blade portion of the upper radial blade 10 ′ is brought into the same plane as the blade portion of the lower radial blade 10 ′ by adjusting the holding amount of the yarn material by the yarn holder 50. It can also be formed or opened in the shape of a “<” in the center line direction.
製造された放射状羽根１０を中心線方向に重ね合わせることにより円筒状ブラシが形成される。円筒状ブラシにおける糸材密度は、放射状羽根１０における糸材本数を調節することにより、用途に応じて任意に選択することができる。重ねられた放射状羽根１０のコア部内面を溶融させることにより、一体化された円筒状ブラシが製造される。 A cylindrical brush is formed by superimposing the manufactured radial blades 10 in the center line direction. The thread material density in the cylindrical brush can be arbitrarily selected according to the application by adjusting the number of thread members in the radial blade 10. An integrated cylindrical brush is manufactured by melting the inner surface of the core portion of the stacked radial blades 10.
上述の実施形態では、先に製造された薄い放射状羽根１０’の貫通孔に糸束２０を通し、その放射状羽根１０’の上で糸束２０を周囲に開いて多段の放射状羽根１０を製造したが、薄い放射状羽根１０’を予め製造し、これらを同心状に重ねてそれぞれの溶着コア部１１’を溶着により一体化することでも製造できる。 In the above-described embodiment, the multi-stage radial blade 10 is manufactured by passing the yarn bundle 20 through the through-hole of the thin radial blade 10 ′ manufactured earlier and opening the yarn bundle 20 around the radial blade 10 ′. However, it can also be manufactured by manufacturing thin radial blades 10 ′ in advance and concentrically stacking them to integrate the respective welded core portions 11 ′ by welding.
放射状羽根１０における薄い放射状羽根１０’の積層枚数は２枚以上である。積層枚数の上限は特に規定しない。前者の方法では、完成した放射状羽根１０’の上に順番に放射状羽根１０’を形成していくことになるので、多数枚の放射状羽根１０’を積層一体化することができる。後者の方法の場合、すなわち、予め製造した放射状羽根１０’を重ねる場合でも、一枚ずつ溶着整合していけば多数枚の放射状羽根１０’を積層一体化することができる。 The number of thin radial blades 10 ′ stacked in the radial blade 10 is two or more. There is no particular upper limit on the number of stacked layers. In the former method, the radial blades 10 'are sequentially formed on the completed radial blades 10', so that a large number of radial blades 10 'can be laminated and integrated. In the case of the latter method, that is, in the case where the previously manufactured radial blades 10 ′ are stacked, a large number of radial blades 10 ′ can be laminated and integrated if they are welded and aligned one by one.
１０，１０’ 放射状羽根
１１ １１’溶着コア部
１２ １２’羽根部
１３ 貫通孔
２０ 糸束
２１ 糸材
３０ 加工ベッド
４０ 溶着ヘッド
５０ 糸押さえ
６０ 切断刃
DESCRIPTION OF SYMBOLS 10,10 'Radial blade | wing 11 11' welding core part 12 12 'blade | wing part 13 Through-hole 20 Yarn bundle 21 Thread material 30 Processing bed 40 Welding head 50 Yarn presser 60 Cutting blade
Claims (8)
The manufacturing method of the radial blade | wing of Claim 6 which repeats a yarn bundle insertion process and a radial blade re-formation process in multiple times.
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| JP2003088424A (en) * | 2001-09-20 | 2003-03-25 | Sankyo Giken:Kk | Method of manufacturing rotary brush, rotary tooth- brush and toothbrush |
| JP2003111618A (en) * | 2001-10-03 | 2003-04-15 | Kitamura Masahiro | Rotation brush and its manufacturing process |
| JP2003289947A (en) * | 2002-04-01 | 2003-10-14 | Hideo Tomiyama | Method and apparatus of manufacturing rotable toothbrush |
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| JP2003088424A (en) * | 2001-09-20 | 2003-03-25 | Sankyo Giken:Kk | Method of manufacturing rotary brush, rotary tooth- brush and toothbrush |
| JP2003111618A (en) * | 2001-10-03 | 2003-04-15 | Kitamura Masahiro | Rotation brush and its manufacturing process |
| JP2003289947A (en) * | 2002-04-01 | 2003-10-14 | Hideo Tomiyama | Method and apparatus of manufacturing rotable toothbrush |
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| WO2009101675A1 (en) * | 2008-02-13 | 2009-08-20 | Hiromi Hujita | Process for producing material sheet for rotary toothbrush |
| JPWO2009101675A1 (en) * | 2008-02-13 | 2011-06-02 | 弘美 藤田 | Manufacturing method of material sheet for rotating toothbrush |
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