上記特許文献１に開示された爪切りにおいて、両刃先の向きを変更する際には、刃体の周辺に入れた指で刃体に触れて刃体を回動させる必要があるため、刃体に対する回動操作が行い難くなって使い勝手が悪くなっていた。
In the nail clipper disclosed in Patent Document 1, when changing the direction of both blade edges, it is necessary to rotate the blade body by touching the blade body with a finger placed around the blade body. It was difficult to perform a rotation operation on the, and the usability was poor.
この発明は、両刃先の向きを変更して爪を切り易くするために刃体を支持体に対し回動可能に支持した爪切りにおいて、刃体に対する回動操作を行い易くして使い勝手をより一層良くすることを目的としている。
In the nail clipper in which the blade body is rotatably supported with respect to the support body in order to make it easier to cut the nail by changing the direction of both blade edges, the rotation operation with respect to the blade body can be easily performed. The goal is to make it even better.
後記実施形態の図面（図１〜８）の符号を援用して本発明を説明する。
請求項１の発明において、相対向する両刃先１９ａ，２０ａを互いに接近離間し得る刃体１８を支持体１に対し回動可能に支持した爪切りは、この刃体１８を回動させて両刃先１９ａ，２０ａの向きを変更し得る操作手段１４，２３を備えている。従って、操作手段１４，２３により、刃体１８に対する回動操作を行い易くして使い勝手を良くすることができる。
The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 8) of the embodiments described later.
In the invention of claim 1, the nail clipper that supports the blade body 18 that can move the blade edges 19 a, 20 a facing each other close to and away from each other so as to be rotatable with respect to the support body 1 rotates the blade body 18 to turn the blades. The operation means 14 and 23 which can change the direction of the tips 19a and 20a are provided. Therefore, the operation means 14 and 23 can facilitate the rotation operation with respect to the blade body 18 and improve the usability.
また、請求項１の発明において、前記操作手段は、例えば刃体１８に対し別に設けられ、可動操作部１４と、この可動操作部１４の動きを刃体１８の回動として伝達する伝動部２３とを備えている。従って、刃体１８に対し可動操作部１４を別に設けて指を刃体１８に触れにくくした場合にも、可動操作部１４を操作して刃体１８を回動させることができる。
In the invention of claim 1, the operation means is provided separately for the blade body 18, for example, and the movable operation portion 14 and the transmission portion 23 that transmits the movement of the movable operation portion 14 as the rotation of the blade body 18. And. Therefore, even when the movable operation unit 14 is separately provided for the blade body 18 so that the finger is difficult to touch the blade body 18, the blade body 18 can be rotated by operating the movable operation unit 14.
さらに、請求項１の発明において、前記刃体１８は前記支持体１の先端部側に支持され、前記可動操作部１４はこの先端部に対し反対側になる支持体１の基端部側に支持され、前記伝動部２３はこの刃体１８と可動操作部１４との間に介在されて例えば支持体１に支持されている。なお、伝動部２３を刃体１８と可動操作部１４とに支持してもよい。従って、支持体１に対し刃体１８と可動操作部１４とを先端部側と基端部側とに並べてコンパクトに配置することができる。
Furthermore, in the invention of claim 1, the blade body 18 is supported on the distal end side of the support body 1, and the movable operation portion 14 is located on the proximal end side of the support body 1 opposite to the distal end section. The transmission unit 23 is supported between the blade body 18 and the movable operation unit 14 and supported by the support body 1, for example. The transmission unit 23 may be supported by the blade body 18 and the movable operation unit 14. Therefore, it is possible to arrange the blade body 18 and the movable operation portion 14 with respect to the support body 1 in a compact manner by arranging them on the distal end side and the proximal end side.
請求項１の発明を前提とする請求項２の発明において、前記支持体１は一対の支持板２，３とこの両支持板２，３間に設けられた収容室９とを有し、前記刃体１８と可動操作部１４と伝動部２３とはこの両支持板２，３間の収容室９で支持体１に支持されている。請求項２の発明では、刃体１８と可動操作部１４と伝動部２３とを両支持板２，３間の収容室９で支持体１に対しコンパクトに支持することができる。なお、刃体１８や可動操作部１４や伝動部２３については、それらの全体が収容室９内に収容されていてもよいし、それらの一部が収容室９外へ突出していてもよい。
In the invention of claim 2 premised on the invention of claim 1 , the support 1 has a pair of support plates 2 and 3 and a storage chamber 9 provided between the support plates 2 and 3, The blade body 18, the movable operation section 14, and the transmission section 23 are supported by the support body 1 in a storage chamber 9 between the support plates 2 and 3. In the invention of claim 2 , the blade body 18, the movable operation section 14, and the transmission section 23 can be supported compactly with respect to the support body 1 in the storage chamber 9 between the support plates 2 and 3. In addition, about the blade body 18, the movable operation part 14, and the transmission part 23, those whole may be accommodated in the storage chamber 9, and those one part may protrude outside the storage chamber 9. FIG.
請求項１または請求項２の発明を前提とする請求項３の発明において、前記可動操作部１４は、前記支持体１に対し回動可能に支持され、刃体１８と可動操作部１４とが並ぶ並設方向Ｘに対し直交する幅方向Ｙへ支持体１から外側に突出している。請求項３の発明では、支持体１に対し刃体１８と可動操作部１４とを並べてコンパクトに配置した際に、可動操作部１４が支持体１８から幅方向Ｙの外側に突出しているので、可動操作部１４に対する回動操作を行い易い。
請求項３の発明を前提とする請求項４の発明において、前記可動操作部１４の回動中心１４ａと前記刃体１８の回動中心１８ａとを互いに平行にした場合、可動操作部１４の回動操作向きと刃体１８の回動向きとを互いに逆向きにするように伝動部２３を設けた。
請求項３の発明を前提とする請求項５の発明において、前記可動操作部１４の回動中心１４ａと前記刃体１８の回動中心１８ａとを互いに平行にした場合、可動操作部１４の回動操作向きと刃体１８の回動向きとを互いに同じ向きにするように伝動部２３を設けた。
請求項４または請求項５の発明では、刃体１８と可動操作部１４とを同じ向きから見て可動操作部１４を回動操作することができるので、刃体１８の両刃先１９ａ，２０ａの回動向きを変更し易い。
In the invention of claim 3 premised on the invention of claim 1 or claim 2 , the movable operation portion 14 is rotatably supported with respect to the support body 1, and the blade body 18 and the movable operation portion 14 are provided. It protrudes outward from the support body 1 in the width direction Y orthogonal to the juxtaposed direction X. In the invention of claim 3, when the blade body 18 and the movable operation portion 14 are arranged compactly with respect to the support 1, the movable operation portion 14 protrudes from the support 18 to the outside in the width direction Y. It is easy to perform a rotation operation on the movable operation unit 14.
In the invention of claim 4 based on the invention of claim 3, when the rotation center 14a of the movable operation portion 14 and the rotation center 18a of the blade body 18 are parallel to each other, the rotation of the movable operation portion 14 is performed. The transmission unit 23 is provided so that the moving operation direction and the rotation direction of the blade body 18 are opposite to each other.
In the invention of claim 5 based on the invention of claim 3, when the rotation center 14a of the movable operation portion 14 and the rotation center 18a of the blade body 18 are parallel to each other, the rotation of the movable operation portion 14 is performed. The transmission portion 23 is provided so that the moving operation direction and the rotation direction of the blade 18 are the same.
In the invention of claim 4 or claim 5, the movable operation unit 14 can be rotated by seeing the blade body 18 and the movable operation unit 14 from the same direction, so that both the blade edges 19 a and 20 a of the blade body 18 can be operated. Easy to change the direction of rotation.
次に、請求項以外の技術的思想について実施形態の図面の符号を援用して説明する。
請求項１から請求項５のうちいずれか一つの請求項の発明を前提とする第６の発明において、前記伝動部は歯車列２３である。第６の発明では、複数の歯車２４，２６，２８，２９を並べた簡単な構造の歯車列２３により伝動部を構成することができる。
Next, technical ideas other than the claims will be described with reference to the reference numerals in the drawings of the embodiments.
In a sixth invention based on the invention of any one of claims 1 to 5, the transmission portion is a gear train 23. In the sixth aspect of the invention, the transmission portion can be configured by a gear train 23 having a simple structure in which a plurality of gears 24, 26, 28, 29 are arranged.
請求項１の発明を前提とする第７の発明において、前記支持体１は、一対の支持板２，３と、この両支持板２，３間に設けられた収容室９とを有し、前記刃体１８は互いに開放された前記両支持板２，３の先端部側の収容室９で支持体１に支持され、前記可動操作部１４はこの先端部に対し反対側になる両支持板２，３の基端部側の収容室９で支持体１に支持され、前記伝動部２３はこの刃体１８と可動操作部１４との間に介在されてこの収容室９で支持体１に支持されている。例えば、一対の支持板２，３のうち少なくとも一方は、両支持板２，３を互いに接近離間し得る弾性を有している。第７の発明では、刃体１８と可動操作部１４と伝動部２３とを両支持板２，３間の収容室９で支持体１に対しコンパクトに支持することができるとともに、両支持板２，３に対し刃体１８と可動操作部１４とを先端部側と基端部側とに並べてコンパクトに配置することができる。
In a seventh invention premised on the invention of claim 1, the support 1 has a pair of support plates 2 and 3 and a storage chamber 9 provided between the support plates 2 and 3, The blade body 18 is supported by the support body 1 in the storage chamber 9 on the distal end side of the two support plates 2 and 3 that are open to each other, and the movable operation portion 14 is opposite to the distal end portion. 2 and 3 are supported by the support body 1 in the storage chamber 9 on the base end side, and the transmission portion 23 is interposed between the blade body 18 and the movable operation section 14, and the support chamber 1 is supported by the storage chamber 9. It is supported. For example, at least one of the pair of support plates 2 and 3 has elasticity capable of moving the support plates 2 and 3 closer to and away from each other. In the seventh invention, the blade body 18, the movable operation portion 14, and the transmission portion 23 can be supported compactly with respect to the support body 1 in the accommodating chamber 9 between the both support plates 2 and 3, and both the support plates 2. , 3, the blade body 18 and the movable operation part 14 can be arranged compactly by arranging them on the distal end side and the proximal end side.
第７の発明を前提とする第８の発明において、前記刃体１８は、両刃先１９ａ，２０ａが両支持板２，３の先端部間の収容室９に収容される収容状態と、両刃先１９ａ，２０ａが両支持板２，３の先端部間の収容室９から突出する突出状態とを取り得る複数の回動位置間で回動し得る。第８の発明では、両刃先１９ａ，２０ａが収容状態を取り得るので、不使用時に刃先１９ａ，２０ａを衣服などに引っ掛けたり刃先１９ａ，２０ａを損傷したりすることをなくすことができる。
In the eighth invention premised on the seventh invention, the blade body 18 has an accommodation state in which both the blade edges 19a, 20a are accommodated in the accommodating chamber 9 between the tip portions of the both support plates 2, 3, and the both edge edges. 19a, 20a can be rotated between a plurality of rotation positions that can assume a protruding state protruding from the storage chamber 9 between the tip portions of both support plates 2, 3. In the eighth invention, since both the blade edges 19a and 20a can be accommodated, it is possible to prevent the blade edges 19a and 20a from being caught on clothes or damaged when not in use.
第７の発明または第８の発明を前提とする第９の発明において、前記可動操作部１４は前記支持体１に対し回動可能に支持されている。第９の発明では、可動操作部１４に対する操作を行い易い。
In the ninth invention based on the seventh invention or the eighth invention, the movable operation portion 14 is supported rotatably with respect to the support 1. In the ninth aspect, it is easy to perform an operation on the movable operation unit 14.
第９の発明を前提とする第１０の発明において、前記可動操作部１４は前記両支持板２，３間の収容室９から外側へ突出している。第１０の発明では、可動操作部１４に対する回動操作を行い易い。
In the tenth invention based on the ninth invention, the movable operation portion 14 protrudes outward from the housing chamber 9 between the support plates 2 and 3. In the tenth aspect, it is easy to perform a turning operation on the movable operation unit 14.
第１０の発明を前提とする第１１の発明において、前記両支持板２，３の基端部には刃体１８と可動操作部１４とが並ぶ並設方向Ｘに対し直交する幅方向Ｙの間隔Ｗ１０が最も広い指当部１０を設け、前記可動操作部１４はその指当部１０より先端側で両支持板２，３間の収容室９から外側へ突出している。第１１の発明では、指当部１０に指や手の平を当てながら可動操作部１４を容易に回動操作することができる。
In the eleventh invention based on the tenth invention, the base end portions of the support plates 2 and 3 have a width direction Y orthogonal to the juxtaposed direction X in which the blade body 18 and the movable operation portion 14 are arranged. The finger holding part 10 having the widest interval W10 is provided, and the movable operation part 14 protrudes outward from the accommodating chamber 9 between the support plates 2 and 3 on the tip side from the finger holding part 10. In the eleventh aspect of the invention, the movable operation unit 14 can be easily rotated while applying a finger or palm to the finger holder 10.
請求項３の発明または第９〜１１の発明のうちいずれか一つの発明を前提とする第１２の発明において、前記可動操作部１４の回動操作角度に対する刃体１８の回動角度の伝動角度比を１以上に設定した。第１２の発明では、可動操作部１４の回動操作角度以上に刃体１８が回動するので、刃体１８の両刃先１９ａ，２０ａの回動向きを変更し易い。
In the twelfth invention based on the invention of claim 3 or any one of the ninth to eleventh inventions, the transmission angle of the rotation angle of the blade body 18 with respect to the rotation operation angle of the movable operation portion 14 The ratio was set to 1 or higher. In the twelfth aspect, since the blade body 18 rotates more than the rotation operation angle of the movable operation portion 14, the rotation direction of both the blade edges 19a, 20a of the blade body 18 can be easily changed.
請求項３の発明または第９〜１２の発明のうちいずれか一つの発明を前提とする第１３の発明において、前記可動操作部１４が所定回動角度毎に回動して支持体１に係止し得るとともにその係止を解除し得るように、可動操作部１４と支持体１との間に係脱部１６，７を設けている。第１３の発明では、可動操作部１４の不用意な回動に伴う刃体１８の不用意な回動を抑制することができる。
In the thirteenth invention based on the invention of claim 3 or any one of the ninth to twelfth inventions, the movable operation portion 14 is rotated by a predetermined rotation angle to be engaged with the support body 1. Engaging / disengaging portions 16 and 7 are provided between the movable operation portion 14 and the support body 1 so that they can be stopped and released. In the thirteenth invention, inadvertent rotation of the blade body 18 due to inadvertent rotation of the movable operation unit 14 can be suppressed.
請求項２の発明または第７〜１３の発明のうちいずれか一つの発明を前提とする第１４の発明において、前記刃体１８は、一対の刃板部１９，２０の基端部を互いに一体に繋ぐ屈曲部２１を有し、相対向する両刃先１９ａ，２０ａのうち、一方の刃先１９ａを一方の刃板部１９の先端部に設けるとともに、他方の刃先２０ａを他方の刃板部２０の先端部に設けた。例えば、一対の刃板部１９，２０のうち少なくとも一方は、互いに接近離間し得る弾性を有している。第１４の発明では、刃体１８を容易に成形することができる。
In the fourteenth invention based on the invention of claim 2 or any one of the seventh to thirteenth inventions , the blade body 18 is configured such that the base end portions of the pair of blade plate portions 19 and 20 are integrated with each other. Among the two cutting edges 19a, 20a facing each other, one cutting edge 19a is provided at the tip of one cutting edge 19 and the other cutting edge 20a is provided on the other cutting edge 20. Provided at the tip. For example, at least one of the pair of blade plate portions 19 and 20 has elasticity that can approach and separate from each other. In the fourteenth invention , the blade body 18 can be easily formed.
第１４の発明を前提とする第１５の発明において、前記両刃板部１９，２０の屈曲部２１は両刃板部１９，２０を互いに接近離間し得る弾性を有し、両刃板部１９，２０の先端部と基端部とを結ぶ長手方向Ｘに対し直交する幅方向Ｙで両刃板部１９，２０の先端部側の幅寸法Ｗ１９，Ｗ２０より屈曲部２１の幅寸法Ｗ２１を小さくした。第１５の発明では、弾性を有する屈曲部２１で両刃板部１９，２０を撓ませ易いとともに、屈曲部２１の弾性により、相対向する両刃先１９ａ，２０ａを互いに離間させた非押圧状態に刃体１８を復帰させることができる。
In a fifteenth aspect based on the fourteenth aspect, the bent portions 21 of the two blade plate portions 19 and 20 have elasticity capable of approaching and separating the two blade plate portions 19 and 20 from each other. The width dimension W21 of the bent portion 21 is made smaller than the width dimensions W19, W20 on the distal end side of the two blade plate portions 19, 20 in the width direction Y orthogonal to the longitudinal direction X connecting the distal end portion and the proximal end portion. In the fifteenth invention , the blade portions 19 and 20 are easily bent by the elastic bent portion 21, and the blades 19a and 20a facing each other are separated from each other by the elasticity of the bent portion 21 in a non-pressed state. The body 18 can be returned.
第１４の発明または第１５の発明を前提とする第１６の発明において、前記両刃板部１９，２０の先端部側と両支持板２，３の先端部側とに支軸３３を挿通し、刃体１８はこの支軸３３に対し両支持板２，３間の収容室９で回動可能に支持され、この支軸３３の一端部には一方の支持板２の外側で押圧操作てこ３４を支持するとともに、この支軸３３の他端部を他方の支持板３の外側に係止し、この押圧操作てこ３４により一方の支持板２及び一方の刃板部１９を押圧して両刃先１９ａ，２０ａを互いに接近し得るようにした。第１６の発明では、刃体１８の回動中心部として支軸３３を兼用した簡単な構造にすることができる。
In the sixteenth invention based on the fourteenth invention or the fifteenth invention , the support shaft 33 is inserted through the tip portions of the two blade plates 19 and 20 and the tip portions of the support plates 2 and 3, The blade body 18 is rotatably supported by the support shaft 33 in the accommodating chamber 9 between the support plates 2 and 3. One end of the support shaft 33 is pressed on the outside of the support plate 2. The other end of the support shaft 33 is locked to the outside of the other support plate 3, and the one operating plate 2 and the one blade plate 19 are pressed by the pressing operation lever 34, so 19a and 20a can be brought close to each other. In the sixteenth aspect of the invention , a simple structure in which the support shaft 33 is also used as the rotation center portion of the blade body 18 can be achieved.
本発明は、両刃先１９ａ，２０ａの向きを変更して爪を切り易くするために刃体１８を支持体１に対し回動可能に支持した爪切りにおいて、刃体１８に対する回動操作を行い易くして使い勝手をより一層良くすることができる。
The present invention performs a rotation operation on the blade body 18 in the nail cutting in which the blade body 18 is rotatably supported with respect to the support body 1 in order to make it easier to cut the claws by changing the directions of the blade edges 19a and 20a. It can be made easier to improve usability.
以下、本発明の一実施形態にかかる爪切りについて図１〜５を参照して説明する。
図３（ａ）に示す支持体１は図１，２に示すようにプラスチック例えばガラス繊維強化ナイロン樹脂などにより成形された上側の支持板２と下側の支持板３とからなる。この上側支持板２及び下側支持板３の長手方向Ｘの前後両側になる先端部側（前側）とその先端部側に対し反対側になる基端部側（後側）とのうち、上側支持板２の基端部外周には突条重合部４が弧状に形成されているとともに、その突条重合部４に囲まれた基端部下側には長手方向Ｘに対し直交する幅方向Ｙの両側で一対の係止腕部５が下方に突設されている。下側支持板３の基端部外周には溝状重合部６が弧状に形成され、その溝状重合部６に囲まれた基端部上側には係止壁部７が形成されているとともにこの係止壁部７を挟む幅方向Ｙの両側で一対の係止凹部８が形成されている。図５（ｂ）（ｃ）に示すように、この上側支持板２の突条重合部４と下側支持板３の溝状重合部６とは上下方向Ｚで相対向して互いに嵌合されて重合され、この上側支持板２の両係止腕部５が下側支持板３の両係止凹部８に係入されて、図５（ａ）に示すように上側支持板２と下側支持板３とが互いに取着されている。上側支持板２の先端部と下側支持板３の先端部とは上下方向Ｚで互いに間隔をあけて相対向し、この上下両側支持板２，３間にはそれらの先端部から基端部にわたり収容室９が形成されて長手方向Ｘの前方と幅方向Ｙの両側へ開放されている。この上下両側支持板２，３は上下方向Ｚへ互いに接近離間し得る弾性を有している。
Hereinafter, a nail clipper according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the support 1 shown in FIG. 3A is composed of an upper support plate 2 and a lower support plate 3 formed of plastic, for example, glass fiber reinforced nylon resin. Of the upper side support plate 2 and the lower side support plate 3, the upper side of the front end side (front side) which is the front and rear sides in the longitudinal direction X and the base end side (rear side) which is opposite to the front end side On the outer periphery of the base end portion of the support plate 2, the ridge overlapping portion 4 is formed in an arc shape, and the width direction Y orthogonal to the longitudinal direction X is below the base end portion surrounded by the ridge overlapping portion 4. A pair of locking arm portions 5 project downward from both sides of the arm. A groove-shaped overlap portion 6 is formed in an arc shape on the outer periphery of the base end portion of the lower support plate 3, and a locking wall portion 7 is formed above the base end portion surrounded by the groove-shaped overlap portion 6. A pair of locking recesses 8 are formed on both sides in the width direction Y across the locking wall 7. As shown in FIGS. 5B and 5C, the protrusion overlapping portion 4 of the upper support plate 2 and the groove overlapping portion 6 of the lower support plate 3 are fitted to each other in the vertical direction Z. As shown in FIG. 5 (a), both the locking arm portions 5 of the upper support plate 2 are engaged with the both locking recesses 8 of the lower support plate 3. The support plate 3 is attached to each other. The distal end portion of the upper support plate 2 and the distal end portion of the lower support plate 3 are opposed to each other with an interval in the vertical direction Z, and between the upper and lower side support plates 2 and 3 from the distal end portion to the proximal end portion. A storage chamber 9 is formed over the front and opens to the front in the longitudinal direction X and to both sides in the width direction Y. The upper and lower side support plates 2 and 3 have elasticity capable of approaching and separating from each other in the vertical direction Z.
前記上下両側支持板２，３の基端部には図４（ａ）（ｂ）に示すように上下両側支持板２，３の先端部と基端部とを結ぶ長手方向Ｘに対し直交する幅方向Ｙの幅寸法Ｗ１０（約２５ｍｍ）が最も広い指当部１０が形成されている。上側支持板２にはその指当部１０より先端側で幅方向Ｙの両側に窪み１１ａを有する支持部１１が形成され、その支持部１１の下側には突条重合部４より先端側で支軸１２の雄軸１２ａが形成されている。下側支持板３にはその指当部１０より先端側で幅方向Ｙの両側に膨らみ１３ａを有する支持部１３が形成され、その支持部１３の上側には溝状重合部６より先端側で支軸１２の雌軸１２ｂが形成されている。上下両側支持板２，３が互いに重合された際に、上側支持板２の雄軸１２ａと下側支持板３の雌軸１２ｂとが図５（ｂ）に示すように互いに挿嵌されるとともに雄ねじ１２ｃにより連結されて支軸１２が上下両側支持板２，３間の収容室９で架設される。下側支持板３の下側には支持部１３から先端部側にわたり爪やすり３ａが凹所３ｂに埋め込まれて露出している。前記雄ねじ１２ｃはこの爪やすり３ａで隠される。
As shown in FIGS. 4 (a) and 4 (b), the base end portions of the upper and lower side support plates 2 and 3 are orthogonal to the longitudinal direction X connecting the distal end portions and the base end portions of the upper and lower side support plates 2 and 3. The finger holder 10 having the widest width dimension W10 (about 25 mm) in the width direction Y is formed. The upper support plate 2 is formed with a support portion 11 having dents 11a on both sides in the width direction Y on the tip side from the finger rest portion 10, and below the support portion 11 on the tip side from the protrusion overlapping portion 4. A male shaft 12a of the support shaft 12 is formed. The lower support plate 3 is formed with a support portion 13 having bulges 13a on both sides in the width direction Y on the tip side from the finger rest portion 10, and above the support portion 13 on the tip side from the groove-like overlap portion 6. A female shaft 12b of the support shaft 12 is formed. When the upper and lower support plates 2 and 3 are overlapped with each other, the male shaft 12a of the upper support plate 2 and the female shaft 12b of the lower support plate 3 are inserted into each other as shown in FIG. The support shaft 12 is erected in the accommodating chamber 9 between the upper and lower support plates 2 and 3 by being connected by the male screw 12c. On the lower side of the lower support plate 3, a nail file 3a is embedded in the recess 3b and exposed from the support portion 13 to the tip end side. The male screw 12c is hidden by the nail file 3a.
図１，２に示す可動操作部１４（操作手段）は、プラスチック例えばポリアセタール樹脂などにより略円板状に成形され、上側端面部と下側端面部との間で貫設された支持孔１５と、外周部に周方向へ並設された多数の指当て凹部１６と、上側端面部に周方向へ並設された多数の回動位置目印凹部１７とを有している。この上側端面部には、この回動位置目印凹部１７以外に、１，２，３・・・の番号や、後記の刃体１８の回転方向を示す矢印や、赤、青、黄などの色による変化表示部を付してもよい。前記上下両側支持板２，３の支持部１１，１３間の収容室９に嵌め込まれた可動操作部１４は、前記支軸１２（雄軸１２ａと雌軸１２ｂと雄ねじ１２ｃ）に対し可動操作部１４の支持孔１５を挿嵌した状態で、支軸１２を中心に回動可能に支持され、上下両側支持板２，３の支持部１１，１３間の収容室９から幅方向Ｙの両側で外方へ突出している。この可動操作部１４については、収容室９から幅方向Ｙの片側でのみ外方へ突出させてもよい。この可動操作部１４の各指当て凹部１６（係脱部）には前記下側支持板３の係止壁部７（係脱部）が可動操作部１４の回動操作に伴い係脱可能に係止されている。
1 and 2, a movable operating portion 14 (operating means) is formed in a substantially disc shape from plastic, for example, polyacetal resin, and has a support hole 15 penetrating between an upper end surface portion and a lower end surface portion. And a large number of finger contact recesses 16 arranged in parallel in the circumferential direction on the outer peripheral portion, and a large number of rotational position mark recesses 17 arranged in parallel in the circumferential direction on the upper end surface portion. In addition to the rotational position marking recess 17, the upper end surface portion has numbers 1, 2, 3..., Arrows indicating the rotation direction of the blade 18 described later, and colors such as red, blue, and yellow You may attach the change display part by. The movable operation part 14 fitted in the storage chamber 9 between the support parts 11 and 13 of the upper and lower side support plates 2 and 3 is movable operation part with respect to the support shaft 12 (male shaft 12a, female shaft 12b and male screw 12c). 14 in the state where 14 support holes 15 are inserted and supported so as to be pivotable about the support shaft 12, from the accommodating chamber 9 between the support portions 11 and 13 of the upper and lower support plates 2 and 3 on both sides in the width direction Y. It protrudes outward. The movable operation unit 14 may be protruded outward only from one side in the width direction Y from the storage chamber 9. In each finger contact recess 16 (engagement / disengagement portion) of the movable operation portion 14, the locking wall portion 7 (engagement / removal portion) of the lower support plate 3 can be engaged and disengaged as the movable operation portion 14 is rotated. It is locked.
図１，２に示す刃体１８は、例えばステンレス鋼などにより成形され、上側の刃板部１９と下側の刃板部２０とからなる。この上下両側刃板部１９，２０の基端部が屈曲部２１で互いに一体に繋がれている。上側刃板部１９の先端部には上側の刃先１９ａが形成され、下側刃板部２０の先端部には下側の刃先２０ａが上側刃先１９ａに相対向して形成されている。上下両側刃板部１９，２０には上下両側刃先１９ａ，２０ａより基端側に支持孔２２が相対向して形成されている。この上下両側刃板部１９，２０の屈曲部２１は上下両側刃板部１９，２０を上下方向Ｚへ互いに接近離間し得る弾性を有し、上下両側刃板部１９，２０は屈曲部２１から前方へ互いに平行に延びている。上下両側刃板部１９，２０の先端部と基端部とを結ぶ長手方向Ｘに対し直交する幅方向Ｙで上下両側刃板部１９，２０の先端部側の幅寸法Ｗ１９，Ｗ２０（約１１ｍｍ）より屈曲部２１の幅寸法Ｗ２１（約５ｍｍ）が小さくなっている。
The blade body 18 shown in FIGS. 1 and 2 is formed of, for example, stainless steel, and includes an upper blade plate portion 19 and a lower blade plate portion 20. The base end portions of the upper and lower side blade plate portions 19 and 20 are integrally connected to each other by a bent portion 21. An upper blade edge 19a is formed at the distal end portion of the upper blade plate portion 19, and a lower blade edge 20a is formed opposite to the upper blade edge 19a at the distal end portion of the lower blade plate portion 20. Support holes 22 are formed in the upper and lower side blade plates 19 and 20 so as to face each other on the base end side from the upper and lower side blade edges 19a and 20a. The bent portions 21 of the upper and lower blade plates 19 and 20 have elasticity capable of moving the upper and lower blade plates 19 and 20 close to and away from each other in the vertical direction Z. The upper and lower blade plates 19 and 20 are separated from the bent portion 21. It extends parallel to each other forward. Width dimensions W19, W20 (about 11 mm) on the distal end side of the upper and lower blade plates 19, 20 in the width direction Y orthogonal to the longitudinal direction X connecting the distal ends and the proximal ends of the upper and lower blade plates 19, 20 ), The width dimension W21 (about 5 mm) of the bent portion 21 is smaller.
図１，２に示す伝動部としての歯車列２３（操作手段）は、前記可動操作部１４の下側端面部に一体成形された平歯車２４と、前記下側支持板３の上側に突設された軸部２５に対し回動可能に挿嵌されてこの可動操作部１４の平歯車２４に噛み合う平歯車２６と、この下側支持板３の上側に突設された軸部２７に対し回動可能に挿嵌されてこの平歯車２６に噛み合う平歯車２８と、この平歯車２８に噛み合う平歯車２９とからなる。これらの平歯車２４，２６，２８，２９はプラスチック例えばポリアセタール樹脂などにより成形されている。前記下側刃板部２０の支持孔２２の両側に連通して係止孔２２ａが形成されているとともに、この平歯車２９には支持孔３０の両側で係止突部３１が形成され、図３（ｂ）に示すようにこの平歯車２９が下側刃板部２０の下側に重合された状態でこの両係止孔２２ａに両係止突部３１が係入される。これらの平歯車２４，２６，２８，２９は下側支持板３の内側に隠される。
A gear train 23 (operating means) as a transmission portion shown in FIGS. 1 and 2 protrudes above the lower support plate 3 and a spur gear 24 integrally formed on the lower end surface portion of the movable operation portion 14. A spur gear 26 that is rotatably fitted to the shaft portion 25 and meshes with the spur gear 24 of the movable operation portion 14, and a shaft portion 27 that protrudes above the lower support plate 3. The spur gear 28 includes a spur gear 28 that is movably inserted and meshed with the spur gear 26, and a spur gear 29 that meshes with the spur gear 28. These spur gears 24, 26, 28, and 29 are formed of plastic such as polyacetal resin. A locking hole 22a is formed in communication with both sides of the support hole 22 of the lower blade plate portion 20, and a locking projection 31 is formed in the spur gear 29 on both sides of the support hole 30. As shown in FIG. 3 (b), the locking projections 31 are engaged with the locking holes 22a in a state where the spur gear 29 is superimposed on the lower side of the lower blade plate portion 20. These spur gears 24, 26, 28, 29 are hidden inside the lower support plate 3.
前記上下両側支持板２，３の先端部側には支持孔３２が形成されている。前記刃体１８の上下両側刃板部１９，２０と平歯車２９とはこの先端部間で収容室９に嵌め込まれ、上下両側支持板２，３の支持孔３２と上下両側刃板部１９，２０の支持孔２２と平歯車２９の支持孔３０とに鉄製の支軸３３が下側支持板３の支持孔３２側から挿通され、刃体１８が平歯車２９とともにこの支軸３３に対し回動可能に支持されている。この刃体１８の回動中心１８ａと前記可動操作部１４の回動中心１４ａとは互いに平行に上下方向Ｚへ延びている。前記可動操作部１４の上側端面部と下側端面部とは上下両側刃板部１９，２０間の範囲にある。
A support hole 32 is formed on the top end side of the upper and lower support plates 2 and 3. The upper and lower side blade plates 19, 20 and the spur gear 29 of the blade body 18 are fitted into the storage chamber 9 between the tip portions, and the support holes 32 of the upper and lower side support plates 2, 3 and the upper and lower side blade plates 19, The support shaft 22 made of iron is inserted into the support hole 22 of the spur gear 29 and the support hole 30 of the spur gear 29 from the support hole 32 side of the lower support plate 3, and the blade 18 rotates together with the spur gear 29 with respect to the support shaft 33. It is supported movably. The rotation center 18a of the blade body 18 and the rotation center 14a of the movable operation unit 14 extend in the vertical direction Z in parallel with each other. The upper end surface portion and the lower end surface portion of the movable operation portion 14 are in a range between the upper and lower side blade plates 19 and 20.
この支軸３３の下端部に形成された頭部３３ａは下側支持板３の下側に係止されて支軸３３の上方への移動を阻止している。この支軸３３の上端部は上側支持板２の上方へ突出し、この上端部には軸孔３３ｂが形成されている。図１，２に示す押圧操作てこ３４はプラスチック例えばガラス繊維強化ナイロン樹脂などにより成形され、その先端部には二股状の力点部３５が形成され、この力点部３５の内側に一対の突軸３５ａが相対向して形成されている。この押圧操作てこ３４は上側支持板２の上側に載せられ、この押圧操作てこ３４の力点部３５の内側にこの支軸３３の上端部が挿入されて、この上端部の軸孔３３ｂに押圧操作てこ３４の両突軸３５ａが回動可能に支持されている。このような組付け状態では、支持体１の上下両側支持板２，３と刃体１８の上下両側刃板部１９，２０とはそれぞれ互いに最も離間した状態で静止している。
A head portion 33a formed at the lower end of the support shaft 33 is locked to the lower side of the lower support plate 3 to prevent the support shaft 33 from moving upward. The upper end portion of the support shaft 33 protrudes upward from the upper support plate 2, and a shaft hole 33b is formed in the upper end portion. The pressing lever 34 shown in FIGS. 1 and 2 is formed of plastic, for example, glass fiber reinforced nylon resin, and a bifurcated force point 35 is formed at the tip, and a pair of projecting shafts 35a are formed inside the force point 35. Are formed opposite to each other. The pressing lever 34 is placed on the upper side of the upper support plate 2, and the upper end portion of the support shaft 33 is inserted inside the force point portion 35 of the pressing lever 34, and the pressing operation lever 34 is pressed into the shaft hole 33 b of the upper end portion. Both projecting shafts 35a of the lever 34 are rotatably supported. In such an assembled state, the upper and lower side support plates 2 and 3 of the support body 1 and the upper and lower side blade plate portions 19 and 20 of the blade body 18 are stationary in a state of being most separated from each other.
この押圧操作てこ３４は、図５（ａ）に示すように、上側支持板２の上側に寝かせた倒伏状態と、上下反転して上側支持板２の上側から斜め上方へ立ち上がる起立状態とを取る。この起立状態で押圧操作てこ３４を下方へ押さえると、押圧操作てこ３４の力点部３５が上側支持板２を押圧するとともに、上側支持板２の支持孔３２の外周壁部が上側刃板部１９を押圧して、上下両側刃先１９ａ，２０ａを互いに接近させる。支持孔３２よりも前方にある上側支持板２の先端縁部で上側刃板部１９を押圧してもよい。押圧操作てこ３４に対する押圧を解除すると、上側支持板２及び上側刃板部１９が弾性により非押圧状態に復帰して上下両側刃先１９ａ，２０ａが互いに離間する。
As shown in FIG. 5A, the pressing lever 34 has a lying state lying on the upper side of the upper support plate 2 and an upright state in which it is turned upside down and rises obliquely upward from the upper side of the upper support plate 2. . When the pressing lever 34 is pressed downward in this standing state, the force point portion 35 of the pressing lever 34 presses the upper support plate 2, and the outer peripheral wall portion of the support hole 32 of the upper support plate 2 is the upper blade plate portion 19. To bring the upper and lower blade edges 19a, 20a closer to each other. The upper blade plate portion 19 may be pressed by the tip edge portion of the upper support plate 2 in front of the support hole 32. When the pressing with respect to the pressing lever 34 is released, the upper support plate 2 and the upper blade plate portion 19 return to the non-pressed state due to elasticity, and the upper and lower blade edges 19a and 20a are separated from each other.
可動操作部１４を回動操作すると、可動操作部１４の各指当て凹部１６が下側支持板３の係止壁部７から抵抗を受けながら順次所定回動角度毎に係脱され、その係脱に伴う抵抗が使用者の手指に操作感覚として伝わる。その回動操作により、前記歯車列２３を介して刃体１８が可動操作部１４の回動操作向きに対し逆の回動向きに支軸３３に対し回動して複数の回動位置を取り、上下両側刃先１９ａ，２０ａの向きを変更することができる。それらの回動位置において、刃体１８は、図３（ｃ）に示すように上下両側刃先１９ａ，２０ａが上下両側支持板２，３の先端部間の収容室９に収容される収容状態と、図３（ａ）に示すように上下両側刃先１９ａ，２０ａがその収容室９から突出する突出状態とを取り得る。可動操作部１４の回動操作角度に対する刃体１８の回動角度の伝動角度比が１以上例えば約１．２〜２．０になるように歯車列２３が設定されている。
When the movable operation unit 14 is rotated, each finger contact recess 16 of the movable operation unit 14 is sequentially engaged and disengaged at predetermined rotation angles while receiving resistance from the locking wall portion 7 of the lower support plate 3. The resistance accompanying the removal is transmitted to the user's fingers as a sense of operation. By the rotation operation, the blade body 18 is rotated with respect to the support shaft 33 in the opposite rotation direction to the rotation operation direction of the movable operation unit 14 through the gear train 23 to take a plurality of rotation positions. The direction of the upper and lower side blade edges 19a, 20a can be changed. In these rotational positions, the blade body 18 is in a housed state in which the upper and lower side blade edges 19a, 20a are housed in the housing chamber 9 between the tip portions of the upper and lower side support plates 2, 3 as shown in FIG. As shown in FIG. 3A, the upper and lower side blade edges 19a, 20a can be in a protruding state protruding from the storage chamber 9. The gear train 23 is set so that the transmission angle ratio of the rotation angle of the blade body 18 to the rotation operation angle of the movable operation unit 14 is 1 or more, for example, about 1.2 to 2.0.
ちなみに、爪切りにおける長手方向Ｘの全長は約７５ｍｍ、可動操作部１４の直径（幅方向Ｙの寸法）は約２６ｍｍ、可動操作部１４の厚み（上下方向Ｚの寸法）は約７ｍｍに設定されている。
By the way, the total length in the longitudinal direction X in the nail clipper is set to about 75 mm, the diameter of the movable operation unit 14 (dimension in the width direction Y) is set to about 26 mm, and the thickness of the movable operation unit 14 (dimension in the vertical direction Z) is set to about 7 mm. ing.
本実施形態は下記の効果を有する。
（１） 可動操作部１４の回動操作を歯車列２３により刃体１８の回動として伝達することができるので、刃体１８に対し可動操作部１４を別に設けて指を刃体１８に触れにくくした場合にも、可動操作部１４を回動操作して刃体１８を回動させることができる。従って、上下両側刃先１９ａ，２０ａの向きの変更を行い易くして使い勝手を良くすることができる。
This embodiment has the following effects.
(1) Since the rotation operation of the movable operation unit 14 can be transmitted as the rotation of the blade body 18 by the gear train 23, the movable operation unit 14 is separately provided for the blade body 18 and the finger touches the blade body 18. Even when it is difficult, the blade 18 can be rotated by rotating the movable operation unit 14. Therefore, it is possible to easily change the direction of the upper and lower blade edges 19a and 20a and improve usability.
（２） 刃体１８と歯車列２３と可動操作部１４とを上下両側支持板２，３間の収容室９で先端部側から基端部側にわたり長手方向Ｘ（並設方向）へ並べてコンパクトに配置することができる。
(2) The blade body 18, the gear train 23, and the movable operation unit 14 are arranged in the longitudinal direction X (parallel arrangement direction) from the distal end side to the proximal end side in the storage chamber 9 between the upper and lower support plates 2 and 3 and compact. Can be arranged.
（３） 可動操作部１４が上下両側支持板２，３間の収容室９から幅方向Ｙの外側に突出しているので、可動操作部１４に対する回動操作を行い易い。
（４） 上下両側刃板部１９，２０の先端部側と上下両側支持板２，３の先端部側とに挿通した支軸３３に対し刃体１８を収容室９で回動可能に支持し、支軸３３の頭部３３ａを下側支持板３に係止するとともに、支軸３３の上端部に支持した押圧操作てこ３４により、上側支持板２及び上側刃板部１９を押圧して上下両側刃先１９ａ，２０ａを互いに接近し得るようにした。従って、刃体１８の回動中心部として支軸３３を兼用した簡単な構造にすることができる。
(3) Since the movable operation part 14 protrudes outward in the width direction Y from the storage chamber 9 between the upper and lower side support plates 2, 3, it is easy to perform a rotation operation on the movable operation part 14.
(4) The blade body 18 is rotatably supported in the housing chamber 9 with respect to the support shaft 33 inserted through the tip end sides of the upper and lower side blade plate portions 19 and 20 and the tip end sides of the upper and lower side support plates 2 and 3. The head 33a of the support shaft 33 is locked to the lower support plate 3, and the upper support plate 2 and the upper blade plate portion 19 are pressed up and down by the pressing lever 34 supported by the upper end portion of the support shaft 33. Both the blade edges 19a and 20a can be brought close to each other. Therefore, a simple structure using the support shaft 33 as the rotation center of the blade body 18 can be achieved.
前記実施形態以外にも例えば下記のように構成してもよい。
・ 伝動部としては、歯車列２３以外に、ベルトなどによる巻掛け伝動手段を採用してもよい。
For example, the following embodiment may be configured as follows.
-As a transmission part, you may employ | adopt the winding transmission means by a belt etc. other than the gear train 23. FIG.
・ 歯車列２３の平歯車２４，２６，２８,２９を省略し、平歯車２９に代えて、刃体１８とともに回動する可動操作部を設けてもよい。
・ 可動操作部１４の回動操作向きと刃体１８の回動向きとを互いに同じ向きにするように歯車列２３を設けてもよい。
The spur gears 24, 26, 28, and 29 in the gear train 23 may be omitted, and a movable operation unit that rotates together with the blade body 18 may be provided instead of the spur gear 29.
The gear train 23 may be provided so that the turning operation direction of the movable operation unit 14 and the turning direction of the blade body 18 are the same.
・ 操作手段としては、支持体１に可動操作部をスライド可能に支持し、その可動操作部に対するスライド操作をラック及びピニオンなどを介して刃体１８の回動として伝達してもよい。
As the operation means, the movable operation unit may be slidably supported on the support 1, and the slide operation on the movable operation unit may be transmitted as the rotation of the blade body 18 via a rack and a pinion.
・ 支持体１としては上側支持板２を省略し、可動操作部１４及び歯車列２３を下側支持板３に支持するとともに、押圧操作てこ３４を上側刃板部１９上で支持してもよい。
・ 支持体１としては下側支持板３を省略し、可動操作部１４及び歯車列２３を上側支持板２に支持するとともに、押圧操作てこ３４を上側刃板部１９上で支持してもよい。
The upper support plate 2 may be omitted as the support 1, the movable operation unit 14 and the gear train 23 may be supported by the lower support plate 3, and the pressing lever 34 may be supported on the upper blade plate unit 19. .
The lower support plate 3 may be omitted as the support 1, the movable operation unit 14 and the gear train 23 may be supported by the upper support plate 2, and the pressing lever 34 may be supported on the upper blade plate unit 19. .
・ 例えば上側支持板２の上側や下側支持板３の下側などの収容室９の外側で可動操作部１４を支持体１に支持してもよい。
・ 押圧操作てこ３４を可動操作部として兼用し、その押圧操作てこ３４の動きを伝動部を介して刃体１８の回動として伝達してもよい。
The movable operation unit 14 may be supported by the support 1 outside the storage chamber 9 such as the upper side of the upper support plate 2 or the lower side of the lower support plate 3.
The pressing lever 34 may also be used as a movable operation unit, and the movement of the pressing lever 34 may be transmitted as the rotation of the blade body 18 through the transmission unit.
・ 上下両側刃板部１９，２０間における幅方向Ｙの両側を爪飛散防止カバーで塞いでもよい。また、その爪飛散防止カバーを着脱可能にしてもよい。
・ 上下両側刃先１９ａ，２０ａを長手方向Ｘへ互いにずらすことなく当接させるばかりでなく、上下両側刃先１９ａ，２０ａを互いに当接させた状態でその上下両側刃先１９ａ，２０ａを長手方向Ｘへ互いにずらしてもよい。例えば、上側刃先１９ａを下側刃先２０ａよりも後側へ０．０１〜０．１５ｍｍずらして刃先１９ａ，２０ａの劣化を防止することができる。
-The both sides in the width direction Y between the upper and lower side blade plates 19 and 20 may be closed with a nail scattering prevention cover. Further, the nail scattering prevention cover may be detachable.
Not only the upper and lower side blade edges 19a and 20a are brought into contact with each other in the longitudinal direction X but also the upper and lower side blade edges 19a and 20a are brought into contact with each other in the longitudinal direction X with the upper and lower side blade edges 19a and 20a being brought into contact with each other. It may be shifted. For example, it is possible to prevent the blade edges 19a and 20a from being deteriorated by shifting the upper blade edge 19a to the rear side by 0.01 to 0.15 mm from the lower blade edge 20a.
・ 可動操作部１４を上方から見た外形状を、十二角形などの多角形や星形や楕円形や矢印形などの異形状にしてもよい。
・ 刃体１８や可動操作部１４の回動に伴い、例えばＬＥＤ電球などのライトを点灯させたり音楽を流したりすることができる電気回路を内蔵させてもよい。
The outer shape of the movable operation unit 14 viewed from above may be a polygonal shape such as a dodecagon, or a different shape such as a star shape, an ellipse shape, or an arrow shape.
-With rotation of the blade 18 and the movable operation part 14, you may incorporate the electric circuit which can light lights, such as an LED bulb, or can play music, for example.
・ 可動操作部１４を刃体１８と機械的に連動させず、例えばスイッチをオンオフするごとに、例えば押しボタンスイッチを一回押すごとに、スイッチから電気的信号を送って刃体１８を所定角度（例えば５度や１０度や１５度など）回動させるようにしてもよい。
The movable operation unit 14 is not mechanically interlocked with the blade body 18, for example, every time the switch is turned on / off, for example, every time the push button switch is pressed, an electrical signal is sent from the switch so that the blade body 18 is moved to a predetermined angle. You may make it rotate (for example, 5 degree | times, 10 degree | times, 15 degree | times, etc.).
・ 図６（ａ）（ｂ）に示すように、刃体１８の上下両側刃板部１９，２０において、上下両側刃先１９ａ，２０ａの付近で幅方向Ｙの両側から補強板部３６を相対向して一体に屈曲させ、上下両側刃先１９ａ，２０ａを互いに当接させた際にこの補強板部３６により上下両側刃板部１９，２０の撓みを抑制して切れ味を維持するようにしてもよい。なお、上下両側刃板部１９，２０のうち一方にのみ同様な補強板部３６を形成してもよい。
As shown in FIGS. 6 (a) and 6 (b), in the upper and lower side blade plates 19 and 20 of the blade body 18, the reinforcing plate portions 36 are opposed to each other from both sides in the width direction Y in the vicinity of the upper and lower side blade edges 19a and 20a. Then, when the upper and lower side blade edges 19a and 20a are brought into contact with each other, the reinforcing plate portion 36 may suppress bending of the upper and lower side blade plate portions 19 and 20 to maintain the sharpness. . Note that the same reinforcing plate portion 36 may be formed on only one of the upper and lower side blade plate portions 19 and 20.
・ 図７（ａ）（ｂ）に示すように、刃体１８の上側刃板部１９において、上側刃先１９ａの付近に、上側刃板部１９の下側で幅方向Ｙへ並ぶ複数の凸部３７ａと上側刃板部１９の上側で幅方向Ｙへ並ぶ複数の凹部３７ｂとを有する補強リブ３７を形成してもよい。また、図８（ａ）（ｂ）に示すように、刃体１８の上側刃板部１９において、上側刃先１９ａの付近に、上側刃板部１９の下側で幅方向Ｙへ延びる凸条３８ａと上側刃板部１９の上側で幅方向Ｙへ延びる凹条３８ｂとを有する補強リブ３８を形成してもよい。上下両側刃先１９ａ，２０ａを互いに当接させた際に、それらの補強リブ３７，３８により上側刃板部１９の撓みを抑制して切れ味を維持することができる。なお、同様な補強リブ３７，３８を刃体１８の下側刃板部２０にも形成してもよい。例えば、これらの補強リブ３７，３８はプレス加工により刃体１８と一体成形する。
7A and 7B, in the upper blade plate portion 19 of the blade body 18, a plurality of convex portions arranged in the width direction Y below the upper blade plate portion 19 in the vicinity of the upper blade edge 19a. A reinforcing rib 37 having 37 a and a plurality of concave portions 37 b arranged in the width direction Y on the upper side of the upper blade plate portion 19 may be formed. Further, as shown in FIGS. 8A and 8B, in the upper blade plate portion 19 of the blade body 18, a ridge 38a extending in the width direction Y below the upper blade plate portion 19 in the vicinity of the upper blade edge 19a. A reinforcing rib 38 having a groove 38b extending in the width direction Y on the upper side of the upper blade plate portion 19 may be formed. When the upper and lower blade edges 19a and 20a are brought into contact with each other, the reinforcing ribs 37 and 38 can suppress the bending of the upper blade plate portion 19 and maintain the sharpness. Similar reinforcing ribs 37 and 38 may be formed on the lower blade plate portion 20 of the blade body 18. For example, these reinforcing ribs 37 and 38 are integrally formed with the blade body 18 by pressing.
