JP7465605B1

JP7465605B1 - Nippers and their manufacturing method

Info

Publication number: JP7465605B1
Application number: JP2023117179A
Authority: JP
Inventors: 征徳下川
Original assignee: 株式会社下川精工
Priority date: 2022-12-07
Filing date: 2023-07-19
Publication date: 2024-04-11
Anticipated expiration: 2043-07-19

Abstract

【課題】先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができ、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程も不要で、熟練を要することなくより容易に作製できるニッパーおよびその製造方法を提供する。【解決手段】本発明のニッパー１は、先端側に刃部２，３を有し後部側に把持操作部４，５を有した一対のステー６，７と、一対のステー６，７を支持した軸部材８を有し、軸部材８は一方のステー６を回動可能に係止するための係止部１０と他方のステー７に固定する固定用第１連結部１１を有し、他方のステー７は軸部材８の固定用第１連結部１１を固定する固定用第２連結部１２を有し、一方のステー６は軸部材８の係止部１０を配する係止部配置用凹部１３と軸部材８の固定用第１連結部１１を挿通する貫通部１４を有している。【選択図】図７[Problem] To provide nippers and a method for manufacturing the same, which can be opened and closed in an optimal state without being affected by the degree of crimping of the shaft end, and which can be easily manufactured without requiring skill, without requiring a process of grinding and polishing the part protruding from the open end of the shaft hole. [Solution] The nippers 1 of the present invention have a pair of stays 6, 7 each having a blade 2, 3 at the tip and a grip operation part 4, 5 at the rear, and a shaft member 8 supporting the pair of stays 6, 7, the shaft member 8 having a locking part 10 for rotatably locking one stay 6 and a first fixing connector 11 for fixing to the other stay 7, the other stay 7 having a second fixing connector 12 for fixing the first fixing connector 11 of the shaft member 8, and the one stay 6 having a locking part placement recess 13 for arranging the locking part 10 of the shaft member 8 and a through part 14 for inserting the first fixing connector 11 of the shaft member 8. [Selected Figure] Figure 7

Description

本発明は、主として爪切りとして使用して好適なニッパーおよびその製造方法に関するものである。 The present invention relates to nippers suitable for use primarily as nail clippers and a method for manufacturing the same.

従来より、先端側に刃部を有し後部側に把持操作部を有した一対のステーと、該一対のステーを交差させた状態で回動可能に支持した軸部材とを有し、把持操作部を操作することで刃部が開閉可能に構成されたニッパーが種々提案されている。例えばそのようなニッパーとして実用新案登録第３１７４４２９号公報のニッパー型爪切りが提案されている。 Various nippers have been proposed in the past that have a pair of stays with a blade at the tip and a gripping part at the rear, and a shaft member that supports the pair of stays in a crossed state and can rotate, and the blade can be opened and closed by operating the gripping part. For example, a nipper-type nail clipper has been proposed in Utility Model Registration No. 3174429.

この種のニッパーは、図１７に示すように、一般に熱間鍛造にて形成した一対のステー８１，８２を交差させた状態で軸孔８３内に軸部材８４を貫通させ、図１８に示すように軸端部８５，８６をそれぞれかしめる。その後、軸孔８３の両開口端から外部にはみ出している部分を研削・研磨して平坦とし、先端側に交差合わせをして両切断刃をそれそれぞれ付して刃部８９を形成することで作製されている。 As shown in Figure 17, this type of nipper is generally made by passing a shaft member 84 through a shaft hole 83 with a pair of stays 81, 82, which are formed by hot forging, crossed, and then crimping the shaft ends 85, 86 as shown in Figure 18. After that, the parts protruding from both open ends of the shaft hole 83 are ground and polished to make them flat, and the tips are crossed and two cutting blades are attached to each of them to form the blade portion 89.

しかし、軸部材８４の軸端部８５，８６のかしめ具合により、一対のステー８１，８２の開閉が緩くなったり、きつくなったりすることがあった。また、かしめ工程の後に、軸孔８３の両開口端から外部にはみ出している部分を研削・研磨して平坦にする工程を有するため、煩雑で最適なニッパーを作製するには熟練を要した。 However, depending on how the shaft ends 85, 86 of the shaft member 84 were crimped, the pair of stays 81, 82 could open or close loosely or tightly. In addition, after the crimping process, the parts protruding from both open ends of the shaft hole 83 had to be ground and polished to make them flat, which was complicated and required skill to make the optimal nippers.

さらに、熱間鍛造にて形成されたニッパーは寸法が区々となり、特に熱間鍛造による熱処理後、冷却過程でステー８１，８２が変形するため、高精度、高品質のニッパーの作製が困難であった。さらに、成形型を要すると共に先端側の交差合わせをして両切断刃をそれそれぞれ付し刃部８９を形成する工程を要し煩雑で時間を要した。 Furthermore, the dimensions of the nippers formed by hot forging vary, and since the stays 81 and 82 deform during the cooling process, especially after the heat treatment by hot forging, it was difficult to produce nippers with high accuracy and quality. Furthermore, it required a forming die and a process of cross-aligning the tip ends, attaching both cutting blades to each of them, and forming the blade portion 89, which was complicated and time-consuming.

実用新案登録第３１７４４２９号公報Utility Model Registration No. 3174429

そこで、本発明の第１の課題は、かしめ工程が不要で、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができ、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程も不要で、熟練を要することなくより容易に作製することができるニッパーを提供することにある。 The first objective of the present invention is to provide a pair of nippers that do not require a crimping process, that have a blade at the tip and a gripping operation part at the rear, and that can be opened and closed in an optimal state without being affected by the degree of crimping of the shaft end, that do not require a process of grinding and polishing the part that protrudes from the open end of the shaft hole, and that can be manufactured more easily without requiring skill.

また、本発明の第２の課題は、かしめ工程が不要で、部品成形時に熱処理および成形型が不要で高精度、高品質のニッパーを作製でき、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることもなく最適な状態で開閉させることができ、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程、先端側の交差合わせをして両切断刃をそれそれぞれ付し刃部を形成する工程も不要で、熟練を要することなくより容易に作製することができるニッパーの製造方法を提供することにある。 The second objective of the present invention is to provide a method for manufacturing nippers that does not require a crimping process, does not require heat treatment or a mold when forming parts, can produce high-precision, high-quality nippers, can open and close a pair of stays that have a blade at the tip and a gripping operation part at the rear, can be opened and closed in an optimal state without being affected by the degree of crimping of the shaft end, and does not require a process of grinding and polishing the part that protrudes from the open end of the shaft hole or a process of cross-matching the tip ends and attaching both cutting blades to each of them to form the blades, and can be manufactured more easily without requiring skill.

上記第１の課題を解決するものは、先端側に刃部を有し後部側に把持操作部を有した一対のステーと、該一対のステーを交差させた状態で支持した軸部材とを有し、前記把持操作部を操作することで前記刃部が開閉可能に構成されたニッパーであって、前記一対のステーの交差部において、前記軸部材は、一方のステーを回動可能に係止するための係止部と他方のステーに固定するための固定用第１連結部とを有し、前記他方のステーは、前記軸部材の前記固定用第１連結部と連結するための固定用第２連結部を有し、前記一方のステーは、前記軸部材の前記係止部を配するための係止部配置用凹部と前記軸部材の前記固定用第１連結部を挿通するための貫通部を有し、前記軸部材の前記固定用第１連結部は、凸部または凹部にて構成され、前記他方のステーの前記固定用第２連結部は、前記軸部材の前記固定用第１連結部の前記凸部または前記凹部に嵌合する凹部または凸部にて構成されていることを特徴とするニッパーである（請求項１）。 The first problem is solved by a pair of nippers having a pair of stays each having a blade portion at a tip end and a gripping portion at a rear end, and a shaft member supporting the pair of stays in a crossed state, the blade portion being configured to be opened and closed by operating the gripping portion, wherein at the crossing portion of the pair of stays, the shaft member has a locking portion for rotatably locking one stay and a first fixing connecting portion for fixing it to the other stay, the other stay has a second fixing connecting portion for connecting it to the first fixing connecting portion of the shaft member, the one stay has a locking portion arrangement recess for arranging the locking portion of the shaft member and a through portion for inserting the first fixing connecting portion of the shaft member, the first fixing connecting portion of the shaft member is configured as a convex portion or a concave portion, and the second fixing connecting portion of the other stay is configured as a concave portion or a convex portion that fits into the convex portion or the concave portion of the first fixing connecting portion of the shaft member ( claim 1).

前記ニッパーは、前記一対のステーの交差部の後方内側に前記一対のステー同士の当接部を有していることが好ましい（請求項２）。 It is preferable that the nippers have an abutment portion between the pair of stays on the rear inner side of the intersection of the pair of stays (Claim 2).

前記ニッパーは、ニッパー型爪切りであることが好ましい（請求項３）。 The nippers are preferably nipper-type nail clippers (Claim 3).

前記ニッパーは、前記一対のステーを開状態に付勢するためのコイルばねを有し、該コイルばねは、前記一対のステーの交差部内において前記一対のステー間に配されて一端側が前記一方のステーに固定され、他端側が前記他方のステーに固定されると共に、前記一方のステー側に第１コイルばね配置溝が設けられ、前記他方のステー側に第２コイルばね配置溝が設けられ、前記第１コイルばね配置溝および第２コイルばね配置溝内に前記コイルばねが螺旋状に配されていることが好ましい（請求項４）。 It is preferable that the nippers have a coil spring for biasing the pair of stays into an open state, the coil spring being arranged between the pair of stays within the intersection of the pair of stays with one end fixed to one of the stays and the other end fixed to the other stay , a first coil spring arrangement groove being provided on the one stay side and a second coil spring arrangement groove being provided on the other stay side, and the coil spring being spirally arranged in the first coil spring arrangement groove and the second coil spring arrangement groove (claim 4).

また、上記第２の課題を解決するものは、先端側に刃部を有し後部側に把持操作部を有した一対のステーと、該一対のステーを交差させた状態で支持した軸部材とを有し、前記把持操作部を操作することで前記刃部が開閉可能に構成されたニッパーであって、前記一対のステーの交差部において、前記軸部材は、一方のステーを回動可能に係止するための係止部と他方のステーに固定するための固定用第１連結部とを有し、前記他方のステーは、前記軸部材の前記固定用第１連結部と連結するための固定用第２連結部を有し、前記一方のステーは、前記軸部材の前記係止部を配するための係止部配置用凹部と前記軸部材の前記固定用第１連結部を挿通するための貫通部を有しているニッパーの製造方法であって、ステーおよび前記軸部材はＮＣ加工により成形され、前記ニッパーの製造方法における前記ステーの成形工程は、前記ステーを長さ方向に２本ずつ連ねて一体に削り出す第１成形工程と、該第１成形工程にて削り出した２連の前記ステーの長さ方向の両側をそれぞれ把持固定した状態で成形する第２成形工程を有していることを特徴とするニッパーの製造方法である（請求項５）。 The second problem is solved by a nipper having a pair of stays each having a blade portion at a tip end and a gripping portion at a rear end, and a shaft member supporting the pair of stays in a crossed state, the blade portion being openable and closable by operating the gripping portion, wherein at the crossing portion of the pair of stays, the shaft member has a locking portion for rotatably locking one stay and a first fixing connector for fixing the one stay to the other stay, the other stay has a second fixing connector for connecting with the first fixing connector of the shaft member, and the one stay is A method for manufacturing nippers having a recess for arranging the locking portion of the shaft member and a through portion for inserting the first fixing connecting portion of the shaft member, wherein the stays and the shaft member are formed by NC processing, and the molding step of the stays in the manufacturing method of the nippers includes a first molding step in which the stays are connected in pairs in the longitudinal direction and cut out as a single unit, and a second molding step in which both longitudinal sides of the two stays machined out in the first molding step are gripped and fixed while being molded (Claim 5).

前記第１成形工程は、前記一対のステーを長さ方向に一体に連ねて削り出すものであることが好ましい（請求項６）。 It is preferable that the first forming process cuts out the pair of stays in a longitudinally integral manner (Claim 6).

請求項１に記載したニッパーによれば、かしめ工程が不要で、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができ、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程も不要で、熟練を要することなくより容易に作製することができる。
請求項２に記載したニッパーによれば、一対のステーの切断刃同士が過度に接触することを規制することができるため、切断刃の損傷を防止して長期に渡って使用可能なニッパーとなる。
請求項３に記載したニッパーによれば、上記請求項１の効果を奏する高品質なニッパー式爪切りが構成される。
請求項４に記載したニッパーによれば、ニッパーを開いた状態に付勢する付勢部材または付勢構造が外部に表れることなく、付勢部材または付勢構造を簡素な構造でかつ低廉に構成できる。 According to the nippers described in claim 1, a crimping process is not required, and the opening and closing of a pair of stays each having a blade portion at the tip and a gripping operating portion at the rear can be opened and closed in an optimal state without being affected by the degree of crimping of the shaft end. There is also no need for a process of grinding and polishing the portion that protrudes outward from the open end of the shaft hole, and the nippers can be manufactured more easily and without requiring skilled labor.
According to the nippers described in claim 2, the cutting blades of the pair of stays can be prevented from coming into excessive contact with each other, thereby preventing damage to the cutting blades and resulting in nippers that can be used for a long period of time.
According to the nippers recited in claim 3 , a high-quality nipper-type nail clipper having the effects of claim 1 is formed.
According to the nippers of the fourth aspect, the biasing member or biasing structure for biasing the nippers to the open state is not exposed to the outside, and the biasing member or biasing structure can be constructed simply and at low cost.

請求項５に記載したニッパーの製造方法によれば、かしめ工程が不要で、部品成形時に熱処理および成形型が不要で高精度、高品質のニッパーを作製でき、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることもなく最適な状態で開閉させることができ、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程、先端側の交差合わせをして両切断刃をそれそれぞれ付し刃部を形成する工程も不要で、熟練を要することなくより容易に作製することができると共に、より精度が高いステーを極めて短時間で効率的に作製できる。
請求項６に記載したニッパーの製造方法によれば、より精度が高い一対のステーを極めて短時間で効率的に作製できる。 According to the method for manufacturing nippers described in claim 5 , a crimping process is not required, and heat treatment and molding dies are not required when molding the parts, so high-precision, high-quality nippers can be produced. The opening and closing of a pair of stays, which have blade portions at the tip and gripping portions at the rear, can be opened and closed in an optimal state without being affected by the degree of crimping of the shaft end. It also does not require a process of grinding and polishing the portion that protrudes from the open end of the shaft hole, or a process of cross-aligning the tip ends and attaching both cutting blades to each of them to form the blade portions . This makes it easier to produce nippers without requiring skill, and allows for more accurate stays to be produced efficiently in an extremely short amount of time.
According to the method for manufacturing nippers set forth in claim 6 , a pair of stays with higher accuracy can be efficiently manufactured in an extremely short time.

本発明のニッパーの一実施例の斜視概略図である。FIG. 1 is a schematic perspective view of an embodiment of a nipper according to the present invention. 図１に示したニッパーの平面概略図である。FIG. 2 is a schematic plan view of the nipper shown in FIG. 1 . 図２に示したニッパーの底面概略図である。FIG. 3 is a schematic bottom view of the nipper shown in FIG. 2 . 図２に示したニッパーの右側面概略図である。FIG. 3 is a schematic right side view of the nipper shown in FIG. 2 . 図２に示したニッパーの左側面概略図である。FIG. 3 is a schematic left side view of the nipper shown in FIG. 2 . 図２に示したニッパーの交差部の構造を説明するための部分縦断面図である。FIG. 3 is a partial vertical sectional view for explaining the structure of an intersection portion of the nippers shown in FIG. 2 . 図２に示したニッパーの交差部付近の部分拡大縦断面図である。FIG. 3 is a partially enlarged vertical cross-sectional view of the vicinity of an intersection of the nippers shown in FIG. 2 . 図２に示したニッパーの平面図である。FIG. 3 is a plan view of the nipper shown in FIG. 2 . 本発明のニッパーの製造方法の特徴的工程を説明するための説明図である。4A to 4C are explanatory diagrams for explaining characteristic steps of the manufacturing method of the nippers of the present invention. 本発明のニッパーの製造方法の他の実施例の特徴的工程を説明するための平面図である。11A to 11C are plan views for explaining characteristic steps of another embodiment of a method for manufacturing nippers according to the present invention. 図１０に示したニッパーの製造方法にて削り出した部品の正面図である。FIG. 11 is a front view of a part machined by the nipper manufacturing method shown in FIG. 10 . 図１０に示したニッパーの製造方法の他の特徴的工程を説明するための平面図である。11 is a plan view for explaining another characteristic step of the method for manufacturing the nippers shown in FIG. 10. FIG. 本発明のニッパーの他の実施例の平面図である。FIG. 11 is a plan view of another embodiment of the nippers of the present invention. 図１３に示した本発明のニッパーの作用を説明するための平面図である。FIG. 14 is a plan view for explaining the operation of the nipper of the present invention shown in FIG. 13 . 本発明のニッパーの他の実施例における交差部付近の部分拡大縦断面図である。FIG. 11 is a partially enlarged vertical cross-sectional view of the vicinity of an intersection in another embodiment of the nippers of the present invention. 本発明のニッパーの他の実施例における交差部付近の部分拡大縦断面図である。FIG. 11 is a partially enlarged vertical cross-sectional view of the vicinity of an intersection in another embodiment of the nippers of the present invention. 従来のニッパーの交差部の構造を説明するための部分拡大縦断面図である。FIG. 11 is a partially enlarged vertical sectional view for explaining the structure of an intersection portion of conventional nippers. 従来のニッパーの交差部の構造を説明するための部分拡大縦断面図である。FIG. 11 is a partially enlarged vertical sectional view for explaining the structure of an intersection portion of conventional nippers.

本発明では、先端側に刃部２，３を有し後部側に把持操作部４，５を有した一対のステー６，７と、一対のステー６，７を交差させた状態で支持した軸部材８とを有し、一対のステー６，７の交差部９において、軸部材８は、一方のステー６を回動可能に係止するための係止部１０と他方のステー７に固定するための固定用第１連結部１１とを有し、他方のステー７は、軸部材８の固定用第１連結部１１と連結するための固定用第２連結部１２を有し、一方のステー６は、軸部材８の係止部１０を配するための係止部配置用凹部１３と軸部材８の固定用第１連結部１１を挿通するための貫通部１４を有していることで、かしめ工程が不要で、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができ、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程も不要で、熟練を要することなくより容易に作製することができるニッパー１およびその製造方法を実現した。 In the present invention, a pair of stays 6, 7 having blades 2, 3 at the tip and gripping operation parts 4, 5 at the rear, and an axial member 8 supporting the pair of stays 6, 7 in a crossed state, and at the crossing part 9 of the pair of stays 6, 7, the axial member 8 has a locking part 10 for rotatably locking one of the stays 6 and a first fixing connecting part 11 for fixing to the other stay 7, the other stay 7 has a second fixing connecting part 12 for connecting to the first fixing connecting part 11 of the axial member 8, and the one stay 6 has a locking part 13 for locking the axial member 8. The nippers 1 and its manufacturing method can be manufactured more easily without requiring any special skills, since they have a recess 13 for arranging the locking part 10 and a through-hole 14 for inserting the first connecting part 11 for fixing the shaft member 8, eliminating the need for a crimping process, and the pair of stays, which have a blade part at the tip and a gripping part at the rear, can be opened and closed in an optimal state without being affected by the degree of crimping of the shaft end. There is also no need for a process of grinding and polishing the part that protrudes from the open end of the shaft hole, resulting in a nippers 1 and its manufacturing method that can be manufactured more easily and without requiring any special skills.

本発明のニッパーおよびその製造方法を図１ないし図９に示した一実施例を用いて説明する。
この実施例のニッパー１は、先端側に刃部２，３を有し後部側に把持操作部４，５を有した一対のステー６，７と、一対のステー６，７を交差させた状態で回動可能に支持した軸部材８とを有し、把持操作部４，５を操作することで刃部２，３が開閉可能に構成されたニッパーであって、一対のステー６，７の交差部９において、軸部材８は、一方のステー６を回動可能に係止するための係止部１０と他方のステー７に固定するための固定用第１連結部１１とを有し、他方のステー７は、軸部材８の固定用第１連結部１１と連結するための固定用第２連結部１２を有し、一方のステー６は、軸部材８の係止部１０を配するための係止部配置用凹部１３と軸部材８の固定用第１連結部１１および他方のステー７の固定用第２連結部１２を挿通するための貫通部１４を有している。以下、各構成について順次詳述する。 The nippers and the method of manufacturing the same according to the present invention will be described with reference to an embodiment shown in FIGS.
The nippers 1 of this embodiment are configured to have a pair of stays 6, 7 each having blades 2, 3 at the tip end and gripping operation parts 4, 5 at the rear end, and a shaft member 8 rotatably supported in a state in which the pair of stays 6, 7 are crossed, and the blades 2, 3 can be opened and closed by operating the gripping operation parts 4, 5, and at the crossing part 9 of the pair of stays 6, 7, the shaft member 8 has a locking part 10 for locking one stay 6 rotatably and a first fixing connecting part 11 for fixing it to the other stay 7, the other stay 7 has a second fixing connecting part 12 for connecting it to the first fixing connecting part 11 of the shaft member 8, and the one stay 6 has a locking part arrangement recess 13 for arranging the locking part 10 of the shaft member 8 and a through part 14 for inserting the first fixing connecting part 11 of the shaft member 8 and the second fixing connecting part 12 of the other stay 7. Each of the components will be described in detail below.

この実施例のニッパー１は、ニッパー式爪切りであり、把持操作部４，５を把持して操作することで刃部２，３を開閉させ、刃部２，３の内側に設けられた切断刃１５，１６にて爪を切断して使用するものである。ただし、本発明のニッパーは爪切りに限定されるものではなく、他の用途に使用されるものも本発明のニッパーの範疇に広く包含される。 The nippers 1 in this embodiment are nipper-type nail clippers, and are used by grasping and operating the gripping operation parts 4, 5 to open and close the blade parts 2, 3, and cutting nails with the cutting edges 15, 16 provided on the inside of the blade parts 2, 3. However, the nippers of the present invention are not limited to nail clippers, and nippers used for other purposes are broadly included in the category of nippers of the present invention.

この実施例のニッパー１は、把持操作部４，５に滑り止めおよび使用者の手を保護するためのグリップ１７，１８がそれぞれ設けられている（図８参照）。これらグリップ１７，１８の形成材料はどのようなものでもよいが、例えばゴムや樹脂などが好適に使用できる。 In this embodiment, the nippers 1 are provided with grips 17, 18 on the gripping sections 4, 5 to prevent slipping and protect the user's hands (see Figure 8). The grips 17, 18 may be made of any material, but rubber or resin, for example, are suitable.

また、この実施例のニッパー１は、図８に示すように、一対のステー６，７を開状態に付勢するための弾性部材１９，２０を有している。これら弾性部材１９，２０は一端側が把持操作部４，５にそれぞれ取り付けられ、他端側が係合するように配された板バネにて構成されており、把持操作部４，５を閉じて爪等を切断した後、付勢力により刃部２，３および把持操作部４，５が開くように作用する。なお、把持操作部４，５を開状態に付勢する機構はこれに限定されるものではなくどのような機構でもよい。 The nippers 1 of this embodiment also have elastic members 19, 20 for biasing the pair of stays 6, 7 to an open state, as shown in Figure 8. These elastic members 19, 20 are composed of leaf springs with one end attached to the gripping operation parts 4, 5, respectively, and the other end arranged to engage with them, and after the gripping operation parts 4, 5 are closed to cut the nail or the like, the biasing force acts to open the blade parts 2, 3 and the gripping operation parts 4, 5. Note that the mechanism for biasing the gripping operation parts 4, 5 to an open state is not limited to this, and any mechanism may be used.

一対のステー６，７は本体部を構成する部材であり、この実施例ではステンレスにて形成されている。ただし、本発明のニッパーは、一対のステーがステンレスにて形成されているものに限定されるものではなく、ニッパーとしての強度または強靭性を有するものであればどのような材料にて形成されていてもよい。 The pair of stays 6, 7 are members that make up the main body, and in this embodiment are made of stainless steel. However, the nippers of the present invention are not limited to those in which the pair of stays are made of stainless steel, and may be made of any material that has the strength and toughness required for nippers.

一対のステー６，７は、図１、図６または図７に示すように、交差部９付近が上下方向に組み合わされ、一対のステー６，７を交差させた状態で軸部材８により略十字状に回動可能に支持されている。 As shown in Figure 1, 6 or 7, the pair of stays 6, 7 are combined in the vertical direction near the intersection 9, and are supported by the shaft member 8 in a substantially cross-shaped manner so that they can rotate.

一対のステー６，７は、図２または図８に示すように、先端側に刃部２，３をそれぞれ有し、刃部２，３の内側にはそれぞれ切断刃１５，１６が設けられ、切断刃１５，１６の最内部が当接して爪等の被切断物が切断されるように構成されている。また、この実施例の刃部２，３の上面側は強度を高めるために鏡面加工が施され、刃部２，３の下面側には図３に示すように多数の長溝２４がそれぞれ平行に形成されている。 As shown in Fig. 2 or 8, the pair of stays 6, 7 have blades 2, 3 at their tip ends, respectively, and cutting blades 15, 16 are provided on the inside of the blades 2, 3, respectively, so that the innermost parts of the cutting blades 15, 16 come into contact with each other to cut the object to be cut, such as a nail. In addition, the upper surfaces of the blades 2, 3 in this embodiment are mirror-finished to increase their strength, and the lower surfaces of the blades 2, 3 have a number of parallel long grooves 24 formed thereon, as shown in Fig. 3.

さらに、この実施例のニッパー１は、図１または図８に示すように、一対のステー６，７の交差部９の後方内側に一対のステー６，７同士の当接部２１を有している。具体的には、一対のステー６，７は、内側に突出する突出部２２，２３をそれぞれ有し、切断刃１５，１６が当接する付近で突出部２２，２３の対向する当接面２２ａ，２３ａが当接するように構成されている。このように、一対のステー６，７が交差部９の後方内側に、一対のステー６，７同士の当接部２１を有することにより、一対のステー６，７の切断刃同士が過度に接触することを規制することができ、切断刃１５，１６の損傷を防止して長期に渡って使用可能なニッパーが構成される。なお、ステー同士の当接部の形態はこれに限定されるものではなく、切断刃同士が過度に接触することを規制できるものであればよく、例えば一対のステー６，７の一方側のみに突出部が設けられ当接するものであってもよい。 Furthermore, as shown in FIG. 1 or FIG. 8, the nippers 1 of this embodiment have abutment portions 21 between the pair of stays 6, 7 on the rear inner side of the intersection 9 of the pair of stays 6, 7. Specifically, the pair of stays 6, 7 have protruding portions 22, 23 that protrude inward, respectively, and are configured so that the opposing abutment surfaces 22a, 23a of the protruding portions 22, 23 abut in the vicinity of the abutment of the cutting blades 15, 16. In this way, by having the abutment portions 21 between the pair of stays 6, 7 on the rear inner side of the intersection 9 of the pair of stays 6, 7, excessive contact between the cutting blades of the pair of stays 6, 7 can be restricted, and the cutting blades 15, 16 can be prevented from being damaged, thereby forming a nipper that can be used for a long period of time. Note that the form of the abutment portions between the stays is not limited to this, and it is sufficient if it is possible to restrict excessive contact between the cutting blades, and for example, a protruding portion may be provided on only one side of the pair of stays 6, 7 and abut against each other.

そして、この実施例のニッパー１は、図７に示すように、一対のステー６，７の交差部９において、軸部材８が一方のステー６を回動可能に係止するための係止部１０と他方のステー７に固定するための固定用第１連結部１１を有している。 As shown in FIG. 7, the nippers 1 of this embodiment have a locking portion 10 at the intersection 9 of the pair of stays 6, 7 for rotatably locking the shaft member 8 to one of the stays 6, and a first fixing connecting portion 11 for fixing the shaft member 8 to the other stay 7.

具体的には、この実施例の軸部材８の係止部１０は、軸部材８に一体に成形された拡径部にて構成されており、係止部１０の下面１０ａにて、一方のステー６の係止部配置用凹部１３の内底面１３ａを係止して、一方のステー６が軸部材８の周りで回動（時計回りおよび反時計回りに回転）可能な状態で保持されるように構成されている。 Specifically, the locking portion 10 of the shaft member 8 in this embodiment is configured as an enlarged diameter portion molded integrally with the shaft member 8, and the lower surface 10a of the locking portion 10 locks the inner bottom surface 13a of the locking portion placement recess 13 of one of the stays 6, so that the one of the stays 6 is held in a state in which it can rotate (clockwise and counterclockwise) around the shaft member 8.

また、この実施例の軸部材８の固定用第１連結部１１は、図７に示すように、係止部１０が設けられている部位から下方に突出（延出）するように一体成形され他方のステー７に固定するための縮径部にて構成されており、他方のステー７の固定用第２連結部１２に回転不能に嵌合するように構成されている。なお、この実施例の軸部材８の固定用第１連結部１１は、他方のステー７の固定用第２連結部１２に嵌合させて固定するものであるが、軸部材と他方のステーとの固定構造はこれに限定されるものではなく、例えば軸部材の固定用第１連結部の側面には第１螺合部が設けられ、他方のステーの固定用第２連結部の内側面には、第１螺合部と螺合する第２螺合部が設けられているものであってもよい。これにより、第１螺合部と第２螺合部を螺合させることにより、軸部材と他方のステーをより容易に固定することができる。なお、この実施例の軸部材８の固定用第１連結部１１は固定用凸部に構成されているが、これに限定されるものではなく、他方のステーに固定できる形態であればよく、例えば他方のステーの固定用第２連結部が固定用凸部に構成されており、軸部材の固定用第１連結部１１が固定用凹部に構成されたものも本発明の範疇に包含される。 In addition, as shown in Fig. 7, the first fixing connection part 11 of the shaft member 8 in this embodiment is formed as a reduced diameter part for fixing to the other stay 7, which is integrally formed so as to protrude (extend) downward from the part where the locking part 10 is provided, and is configured to be non-rotatably fitted into the second fixing connection part 12 of the other stay 7. Note that the first fixing connection part 11 of the shaft member 8 in this embodiment is fitted into the second fixing connection part 12 of the other stay 7 to fix it, but the fixing structure between the shaft member and the other stay is not limited to this, and for example, a first screw part may be provided on the side surface of the first fixing connection part of the shaft member, and a second screw part that screws into the first screw part may be provided on the inner side surface of the second fixing connection part of the other stay. This makes it easier to fix the shaft member to the other stay by screwing the first screw part and the second screw part together. In this embodiment, the first fixing connecting portion 11 of the shaft member 8 is configured as a fixing convex portion, but this is not limited to this and may be in any form that allows it to be fixed to the other stay. For example, an arrangement in which the second fixing connecting portion of the other stay is configured as a fixing convex portion and the first fixing connecting portion 11 of the shaft member is configured as a fixing concave portion is also included in the scope of the present invention.

他方のステー７は、軸部材８の固定用第１連結部１１と連結するための固定用第２連結部１２を有している。この実施例の他方のステー７は、中央部付近に上方に向かって環状に突出（延出）して設けられた固定用第２連結部１２を有している。 The other stay 7 has a second fixing connection part 12 for connecting to the first fixing connection part 11 of the shaft member 8. In this embodiment, the other stay 7 has a second fixing connection part 12 that protrudes (extends) upward in a ring shape near the center.

この実施例の一方のステー６は、軸部材８の係止部１０を配するための係止部配置用凹部１３を有すると共に、その下方に他方のステー７の固定用第２連結部１２を配するための貫通部１４を有している。 In this embodiment, one of the stays 6 has a recess 13 for arranging the locking portion 10 of the shaft member 8, and below that has a through-hole 14 for arranging the second connecting portion 12 for fixing of the other stay 7.

このように、この実施例のニッパー１は、一対のステー６，７の交差部９において、軸部材８が一方のステー６を回動可能に係止するための係止部１０と他方のステー７に固定するための固定用第１連結部１１とを有し、他方のステー７は、軸部材８の固定用第１連結部１１と連結するための固定用第２連結部１２を有し、一方のステー６は、軸部材８の係止部１０を配するための係止部配置用凹部１３と他方のステー７の固定用第２連結部１２を配するための、或いは軸部材８の固定用第１連結部１１を挿通するための貫通部１４を有しているため、軸部材８の両側の軸端部をかしめることなく、一対のステー６，７と軸部材８を組み付ければよく、換言すれば、一方のステー６を軸部材８と他方のステー７で挟んだ状態で軸部材８と他方のステー７を固定すればよいため、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができる。また、各部材（一対のステー６，７と軸部材８）の組付けにより交差部９を容易に構成できるため、かしめにより軸孔の開口端から外部にはみ出した部分を研削・研磨する工程も不要で、熟練も要することなくより容易に作製できる。 In this way, in the nippers 1 of this embodiment, at the intersection 9 of the pair of stays 6, 7, the shaft member 8 has an engagement portion 10 for rotatably engaging one of the stays 6 and a first fixing connection portion 11 for fixing to the other stay 7, the other stay 7 has a second fixing connection portion 12 for connecting to the first fixing connection portion 11 of the shaft member 8, and one of the stays 6 has an engagement portion arrangement recess 13 for arranging the engagement portion 10 of the shaft member 8 and a recess for arranging the second fixing connection portion 12 of the other stay 7, or Since it has a through-hole 14 for inserting the first connecting part 11 for fixing of the shaft member 8, it is possible to assemble the pair of stays 6, 7 and the shaft member 8 without crimping the shaft ends on both sides of the shaft member 8. In other words, it is possible to fix the shaft member 8 and the other stay 7 while sandwiching one stay 6 between the shaft member 8 and the other stay 7. Therefore, the opening and closing of the pair of stays having a blade part at the tip and a gripping operation part at the rear side is not affected by the crimping condition of the shaft end, and can be opened and closed in an optimal state. In addition, since the intersection part 9 can be easily formed by assembling each part (the pair of stays 6, 7 and the shaft member 8), there is no need to grind and polish the part that protrudes from the opening end of the shaft hole due to crimping, and it can be manufactured more easily without requiring skill.

つぎに、図１３または図１４に示した本発明のニッパーの他の実施例について説明する。
この実施例のニッパー７０と前述したニッパー１との基本的な相違は、前述したニッパー１が、図８に示すように一対のステー６，７を開状態に付勢するための弾性部材１９，２０の一端側が把持操作部４，５にそれぞれ取り付けられ、他端側が係合するように配された板バネにて構成されているのに対して、この実施例のニッパー７０は、一対のステー６，７を開状態に付勢するためのコイルばね７１を有し、コイルばね７１は、一対のステー６，７の交差部９内において一対のステー６，７間に配されて一端７１ａ側が一方のステー６に固定され、他端７１ｂ側が他方のステー７に固定されている。ニッパー１と同一構成部分については同一符号を付し説明を省略する。 Next, another embodiment of the nippers of the present invention shown in FIG. 13 or 14 will be described.
The basic difference between the nippers 70 of this embodiment and the nippers 1 described above is that the nippers 1 described above are configured as leaf springs arranged so that one end side of elastic members 19, 20 for urging the pair of stays 6, 7 to an open state is attached to the gripping operation portions 4, 5, respectively, and the other end side is engaged therewith, as shown in Fig. 8, whereas the nippers 70 of this embodiment have a coil spring 71 for urging the pair of stays 6, 7 to an open state, and the coil spring 71 is arranged between the pair of stays 6, 7 within the intersection 9 of the pair of stays 6, 7, with one end 71a fixed to one stay 6 and the other end 71b fixed to the other stay 7. The same components as those of the nippers 1 are given the same reference numerals and description thereof will be omitted.

具体的には、この実施例のニッパー７は、一方のステー６側に第１コイルばね配置溝７２が設けられ、他方のステー７側に第２コイルばね配置溝７３が設けられ、これらに螺旋状のコイルばね７１が配されることにより、交差部９内において一対のステー６，７間にコイルばね７１が配されている。 Specifically, in this embodiment, the nippers 7 are provided with a first coil spring arrangement groove 72 on one stay 6 side and a second coil spring arrangement groove 73 on the other stay 7 side, and a spiral coil spring 71 is arranged in these, so that the coil spring 71 is arranged between the pair of stays 6, 7 within the intersection 9.

そして、自然な状態では、図１３に示すように、一対のステー６，７を開状態に付勢するコイルばね７１の付勢力によってニッパー７０は開いた状態にあり、把持操作部４，５を把持して、図１４のように閉じて爪等を切断した後は、コイルばね７１の復元力によって刃部２，３および把持操作部４，５が開くように作用する。上記のような構造で、一対のステー６，７の交差部９内にコイルばね７１を配することで、ニッパー７０を開いた状態に付勢する付勢部材または付勢構造（例えばコイルばね７１等）が外部に表れることなく、付勢部材または付勢構造を簡素な構造でかつ低廉に構成することができる。 In a natural state, as shown in FIG. 13, the nippers 70 are in an open state due to the biasing force of the coil spring 71 that biases the pair of stays 6, 7 to an open state, and after the gripping operation parts 4, 5 are gripped and closed as shown in FIG. 14 to cut a nail or the like, the restoring force of the coil spring 71 acts to open the blade parts 2, 3 and the gripping operation parts 4, 5. With the above structure, by disposing the coil spring 71 within the intersection 9 of the pair of stays 6, 7, the biasing member or biasing structure (e.g., the coil spring 71, etc.) that biases the nippers 70 to an open state is not exposed to the outside, and the biasing member or biasing structure can be constructed with a simple structure and at low cost.

つぎに、図１５に示した本発明のニッパーの他の実施例について説明する。
この実施例のニッパー３０と前述したニッパー１との基本的な相違は、この実施例のニッパー３０の軸部材が、第１軸部材（凸部側軸部材）と第２軸部材（凹部側軸部材）から構成される点であり、交差部３５以外の部分についてはニッパー１と同様である。ニッパー１と同一構成部分については同一符号を付し説明を省略する。 Next, a description will be given of another embodiment of the nippers of the present invention shown in FIG.
The basic difference between the nippers 30 of this embodiment and the nippers 1 described above is that the shaft members of the nippers 30 of this embodiment are composed of a first shaft member (the shaft member on the convex portion side) and a second shaft member (the shaft member on the concave portion side), and the parts other than the intersection portion 35 are the same as those of the nippers 1. The same components as those of the nippers 1 are given the same reference numerals and the description thereof will be omitted.

この実施例のニッパー３０は、先端側に刃部２，３を有し後部側に把持操作部４，５を有した一対のステー３１，３２と、一対のステー３１，３２を交差させた状態で回動可能に支持した第１軸部材３３および第２軸部材３４とを有し、把持操作部４，５を操作することで刃部２，３が開閉可能に構成されたニッパーであって、一対のステー３１，３２の交差部３５において、第１軸部材３３は、一方のステー３１を回動可能に係止するための第１係止部３６と第２軸部材３４に固定するための固定用第１連結部３７とを有し、第２軸部材３４は、他方のステー３２を回動可能或いは回動不能に係止するための第２係止部３８と第１軸部材３３の固定用第１連結部３７と連結するための固定用第２連結部３９を有し、一方のステー３１は、第１軸部材３３の第１係止部３６を配するための第１係止部配置用凹部４０と第１軸部材３３の固定用第１連結部３７を挿通するための第１貫通部４１を有し、他方のステー３２は、第２軸部材３４の第２係止部３８を配するための第２係止部配置用凹部４２と第２軸部材３４の固定用第２連結部３９を挿通するための第２貫通部４３を有している。以下、各構成について順次詳述する。 The nippers 30 of this embodiment have a pair of stays 31, 32 each having blades 2, 3 at the tip and gripping parts 4, 5 at the rear, and a first shaft member 33 and a second shaft member 34 that rotatably support the pair of stays 31, 32 in a crossed state, and are configured so that the blades 2, 3 can be opened and closed by operating the gripping parts 4, 5. At the crossing part 35 of the pair of stays 31, 32, the first shaft member 33 has a first locking part 36 for locking one of the stays 31 in a rotatable manner and a first connecting part 37 for fixing to the second shaft member 34, and the second shaft member 34 has a second locking portion 38 for locking the other stay 32 rotatably or non-rotatably and a second fixing connecting portion 39 for connecting to the first fixing connecting portion 37 of the first shaft member 33, one stay 31 has a first locking portion arrangement recess 40 for arranging the first locking portion 36 of the first shaft member 33 and a first through portion 41 for inserting the first fixing connecting portion 37 of the first shaft member 33, and the other stay 32 has a second locking portion arrangement recess 42 for arranging the second locking portion 38 of the second shaft member 34 and a second through portion 43 for inserting the second fixing connecting portion 39 of the second shaft member 34. Each configuration will be described in detail below.

この実施例のニッパー３０は、一対のステー３１，３２の交差部３５において、第１軸部材３３が、一方のステー３１を回動可能に係止するための第１係止部３６と第２軸部材３４に固定するための固定用第１連結部３７とを有している。 In this embodiment, the nippers 30 have a first shaft member 33 at the intersection 35 of a pair of stays 31, 32, which has a first locking portion 36 for rotatably locking one of the stays 31 and a first fixing connecting portion 37 for fixing to the second shaft member 34.

具体的には、この実施例の第１軸部材３３の第１係止部３６は、第１軸部材３３に一体に成形された環状拡径部にて構成されており、第１係止部３６の上面３６ａにて、一方のステー３１の第１係止部配置用凹部４０の内底面４０ａを係止して、一方のステー３１が第１軸部材３３の周りで回動（時計回りおよび反時計回りに回転）可能な状態で保持されるよう構成されている。 Specifically, in this embodiment, the first locking portion 36 of the first shaft member 33 is configured as an annular enlarged diameter portion molded integrally with the first shaft member 33, and the upper surface 36a of the first locking portion 36 locks the inner bottom surface 40a of the recess 40 for arranging the first locking portion of one stay 31, so that the one stay 31 is held in a state in which it can rotate (rotate clockwise and counterclockwise) around the first shaft member 33.

また、この実施例の第１軸部材３３の固定用第１連結部３７は固定用凸部に構成され、第１係止部３６が設けられている部位から上方に突出（延出）するように一体成形され他方のステー３２に固定するための縮径部であり、他方のステー３２の固定用第２連結部３９に回転不能に嵌合するよう構成されている。ただし、本発明の第１軸部材３３の固定用第１連結部３７は固定用凸部に限定されず、第２軸部材３４の固定用第２連結部３９に固定できる形態であればよく、例えば第２軸部材３４の固定用第２連結部が固定用凸部に構成されており、第１軸部材３３の固定用第１連結部が固定用凹部に構成されたものも本発明の範疇に包含される。 In addition, the first fixing connection part 37 of the first shaft member 33 in this embodiment is configured as a fixing protrusion, is integrally molded so as to protrude (extend) upward from the part where the first locking part 36 is provided, is a reduced diameter part for fixing to the other stay 32, and is configured to non-rotatably fit into the second fixing connection part 39 of the other stay 32. However, the first fixing connection part 37 of the first shaft member 33 of the present invention is not limited to a fixing protrusion, and may be in any form that can be fixed to the second fixing connection part 39 of the second shaft member 34. For example, a configuration in which the second fixing connection part of the second shaft member 34 is configured as a fixing protrusion and the first fixing connection part of the first shaft member 33 is configured as a fixing recess is also included in the scope of the present invention.

第２軸部材３４の第２係止部３８は、他方のステー３２を回動可能或いは回動不能に係止するための部位であり、この実施例の第２軸部材３４の第２係止部３８は、第２軸部材３４に一体に成形された環状拡径部にて構成されており、第２係止部３８の下面３８ａにて、他方のステー３２の第２係止部配置用凹部４２の内底面４２ａを係止して、他方のステー３２が第２軸部材３４の周りで回動（時計回りおよび反時計回りに回転）可能或いは回動不能な状態で保持されるよう構成されている。 The second locking portion 38 of the second shaft member 34 is a portion for locking the other stay 32 so that it can rotate or cannot rotate. In this embodiment, the second locking portion 38 of the second shaft member 34 is configured as an annular enlarged diameter portion molded integrally with the second shaft member 34, and the lower surface 38a of the second locking portion 38 locks the inner bottom surface 42a of the second locking portion placement recess 42 of the other stay 32, so that the other stay 32 is held in a state in which it can rotate (rotate clockwise and counterclockwise) around the second shaft member 34 or cannot rotate.

第２軸部材３４の固定用第２連結部３９は、第１軸部材３３の固定用第１連結部３７と連結するための部位であり、この実施例の固定用第２連結部３９は中央部付近において下方に向かって環状に突出（延出）して設けられている。 The second fixing connection part 39 of the second shaft member 34 is a part for connecting with the first fixing connection part 37 of the first shaft member 33, and in this embodiment, the second fixing connection part 39 is provided so as to protrude (extend) downward in a ring shape near the center.

この実施例の一方のステー３１は、第１軸部材３３の第１係止部３６を配するための第１係止部配置用凹部４０を有すると共に、その上部に第１軸部材３３の固定用第１連結部３７を挿通するための第１貫通部４１を有している。 In this embodiment, one of the stays 31 has a recess 40 for arranging the first locking portion 36 of the first shaft member 33, and a first through portion 41 at the top for inserting the first fixing connecting portion 37 of the first shaft member 33.

他方、この実施例の他方のステー３２は、第２軸部材３４の第２係止部３８を配するための第２係止部配置用凹部４２を有すると共に、その下部に第２軸部材３４の固定用第２連結部３９を挿通するための第２貫通部４３を有している。 On the other hand, the other stay 32 in this embodiment has a recess 42 for arranging the second locking portion 38 of the second shaft member 34, and has a second through portion 43 at its lower portion for inserting the second fixing connecting portion 39 of the second shaft member 34.

このように、この実施例のニッパー３０は、一対のステー３１，３２の交差部３５において、第１軸部材３３が一方のステー３１を回動可能に係止するための第１係止部３６と第２軸部材３４に固定するための固定用第１連結部３７とを有し、第２軸部材３４が他方のステー３２を回動可能或いは回動不能に係止するための第２係止部３８と第１軸部材３３の固定用第１連結部３７と連結するための固定用第２連結部３９を有し、一方のステー３１は、第１軸部材３３の第１係止部３６を配するための第１係止部配置用凹部４０と第１軸部材３３の固定用第１連結部３７を挿通するための第１貫通部４１を有し、他方のステー３２は、第２軸部材３４の第２係止部３８を配するための第２係止部配置用凹部４２と第２軸部材３４の固定用第２連結部３９を挿通するための第２貫通部４３を有しているため、軸部材の両側の軸端部をかしめる必要がなく、一対のステー３１，３２と第１軸部材３３と第２軸部材３４を組み付ければよく、換言すれば、一対のステー３１，３２を第１軸部材３３と第２軸部材３４にて挟んだ状態で第１軸部材３３と第２軸部材３４を固定すればよいため、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができる。また、各部材（一対のステー３１，３２、第１軸部材３３および第２軸部材３４）の組付けにより交差部３５を容易に構成できるため、かしめにより軸孔の開口端から外部にはみ出した部分を研削・研磨する工程も不要で、熟練も要することなくより容易に作製できる。 In this way, in the nippers 30 of this embodiment, at the intersection 35 of the pair of stays 31, 32, the first shaft member 33 has a first locking portion 36 for rotatably locking one of the stays 31 and a first fixing connecting portion 37 for fixing to the second shaft member 34, and the second shaft member 34 has a second locking portion 38 for rotatably or non-rotatably locking the other stay 32 and a second fixing connecting portion 39 for connecting to the first fixing connecting portion 37 of the first shaft member 33. One stay 31 has a first locking portion arrangement recess 40 for arranging the first locking portion 36 of the first shaft member 33 and a first through portion 41 for inserting the first fixing connecting portion 37 of the first shaft member 33, and the other stay Since the stays 32 have a second locking portion placement recess 42 for placing the second locking portion 38 of the second shaft member 34 and a second through portion 43 for inserting the second fixing connecting portion 39 of the second shaft member 34, there is no need to crimp the shaft ends on both sides of the shaft member, and it is sufficient to assemble the pair of stays 31, 32 and the first shaft member 33 and the second shaft member 34.In other words, it is sufficient to fix the first shaft member 33 and the second shaft member 34 in a state where the pair of stays 31, 32 are sandwiched between the first shaft member 33 and the second shaft member 34.Therefore, the opening and closing of the pair of stays, which have blade portions on the tip side and gripping operating portions on the rear side, can be opened and closed in an optimal state without being affected by the degree of crimping of the shaft ends. In addition, the intersection 35 can be easily constructed by assembling each component (the pair of stays 31, 32, the first shaft member 33, and the second shaft member 34), so there is no need to grind or polish the part that protrudes from the open end of the shaft hole due to crimping, and it can be manufactured more easily without requiring skill.

さらに、図１６に示した本発明のニッパーの他の実施例について説明する。
この実施例のニッパー５０と前述したニッパー３０との相違は、ニッパー３０の第１軸部材３３の固定用第１連結部３７が、第２軸部材３４の固定用第２連結部３９に嵌合させて固定されるものであるところ、この実施例のニッパー５０における第１軸部材５１の固定用第１連結部５２は、側面に第１螺合部５３が設けられ、第２軸部材５４の固定用第２連結部５５は、内側面に第１螺合部５３と螺合する第２螺合部５６が設けられて、第１螺合部５３と第２螺合部５６を螺合させることにより、第１軸部材５１と第２軸部材５４とを容易に固定することができるように構成されている点のみである。すなわち、この実施例のニッパー５０は、駆動部５７の＋穴、－穴或いは六角穴等にドライバーや六角レンチ等を挿入して第１軸部材３３を回転させることで、第１螺合部５３と第２螺合部５６を螺合させて第１軸部材５１と第２軸部材５４とを容易に固定することができるものである。ニッパー３０と同一構成部分については同一符号を付し説明を省略する。 Next, another embodiment of the nippers according to the present invention will be described with reference to FIG.
The only difference between the nippers 50 of this embodiment and the nippers 30 described above is that the first fixing connecting portion 37 of the first shaft member 33 of the nippers 30 is fixed by engaging with the second fixing connecting portion 39 of the second shaft member 34, whereas the first fixing connecting portion 52 of the first shaft member 51 in the nippers 50 of this embodiment has a first screw-type portion 53 on its side, and the second fixing connecting portion 55 of the second shaft member 54 has a second screw-type portion 56 on its inner side which screws with the first screw-type portion 53, so that the first shaft member 51 and the second shaft member 54 can be easily fixed together by screwing the first screw-type portion 53 and the second screw-type portion 56 together. That is, in the nippers 50 of this embodiment, by inserting a screwdriver or hexagonal wrench into the + hole, - hole or hexagonal hole of the drive unit 57 and rotating the first shaft member 33, the first screwing portion 53 and the second screwing portion 56 are screwed together, and the first shaft member 51 and the second shaft member 54 can be easily fixed together. The same components as those of the nippers 30 are given the same reference numerals and their explanations are omitted.

つぎに、本発明のニッパーの製造方法について一実施例を用いて説明する。
この実施例のニッパーの製造方法は、先端側に刃部２，３を有し後部側に把持操作部４，５を有した一対のステー６，７と、一対のステー６，７を交差させた状態で回動可能に支持した軸部材８とを有し、一対のステー６，７の交差部９において、軸部材８は、一方のステー６を回動可能に係止するための係止部１０と他方のステー７に固定するための固定用第１連結部１１とを有し、他方のステー７は、軸部材８の固定用第１連結部１１と連結するための固定用第２連結部１２を有し、一方のステー６は、軸部材８の係止部１０を配するための係止部配置用凹部１３と軸部材８の固定用第１連結部１１を挿通するための貫通部１４を有しているニッパー１の製造方法であって、一対のステー６，７および軸部材８はＮＣ加工(numerical control machining)により成形されていることを特徴とするニッパーの製造方法である。ニッパー１の各構成については前述した通りであり詳述を省略する。 Next, a method for manufacturing the nippers of the present invention will be described using one embodiment.
The manufacturing method of the nippers of this embodiment is a manufacturing method of the nippers 1 having a pair of stays 6, 7 having blades 2, 3 at the tip side and grip operation parts 4, 5 at the rear side, and a shaft member 8 rotatably supported in a state where the pair of stays 6, 7 are crossed, and at the crossing part 9 of the pair of stays 6, 7, the shaft member 8 has a locking part 10 for locking one stay 6 rotatably and a first fixing connecting part 11 for fixing to the other stay 7, the other stay 7 has a second fixing connecting part 12 for connecting to the first fixing connecting part 11 of the shaft member 8, and the one stay 6 has a locking part arrangement recess 13 for arranging the locking part 10 of the shaft member 8 and a through part 14 for inserting the first fixing connecting part 11 of the shaft member 8, and the pair of stays 6, 7 and the shaft member 8 are formed by NC machining (numerical control machining). The components of the nippers 1 are as described above, and detailed description will be omitted.

この実施例のニッパー１の製造方法によれば、各部品（一対のステー６，７および軸部材８）の成形工程が、例えば図９に示すように被加工物（この実施例ではステンレス板）６０に対するＮＣ加工により行われるため、部品成形時に熱処理が行われないことから冷却過程で各部品が変形することがなく、高精度、高品質の部品が形成されると共に成形型も不要である。また、各部品の組み立て工程にかしめ工程を要しないため、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができる。さらに、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程、先端側の交差合わせをして両切断刃をそれそれぞれ付し刃部を形成する工程も不要で、熟練を要することなくより容易にニッパー１を作製することができる。 According to the manufacturing method of the nipper 1 of this embodiment, the forming process of each part (a pair of stays 6, 7 and axle member 8) is performed by NC processing of the workpiece (stainless steel plate in this embodiment) 60, for example, as shown in FIG. 9. Therefore, since no heat treatment is performed during part forming, each part does not deform during the cooling process, and high-precision, high-quality parts are formed, and a forming mold is not required. In addition, since the assembly process of each part does not require a crimping process, the opening and closing of the pair of stays, which have a blade part at the tip side and a gripping operation part at the rear side, is not affected by the crimping condition of the shaft end, and can be opened and closed in an optimal state. Furthermore, there is no need for a process of grinding and polishing the part protruding from the opening end of the shaft hole, or a process of crossing the tip side and attaching both cutting blades to each of them to form the blade part, so the nipper 1 can be made more easily without requiring skill.

さらに、本発明のニッパー製造方法の他の実施例について説明する。
この実施例のニッパーの製造方法は、先端側に刃部２，３を有し後部側に把持操作部４，５を有した一対のステー３１，３２と、一対のステー３１，３２を交差させた状態で回動可能に支持した第１軸部材３３および第２軸部材３４とを有し、把持操作部４，５を操作することで刃部２，３が開閉可能に構成されたニッパーであって、一対のステー３１，３２の交差部３５において、第１軸部材３３は、一方のステー３１を回動可能に係止するための第１係止部３６と第２軸部材３４に固定するための固定用第１連結部３７とを有し、第２軸部材３４は、他方のステー３２を回動可能或いは回動不能に係止するための第２係止部３８と第１軸部材３３の固定用第１連結部３７と連結するための固定用第２連結部３９を有し、一方のステー３１は、第１軸部材３３の第１係止部３６を配するための第１係止部配置用凹部４０と第１軸部材３３の固定用第１連結部３７を挿通するための第１貫通部４１を有し、他方のステー３２は、第２軸部材３４の第２係止部３８を配するための第２係止部配置用凹部４２と第２軸部材３の固定用第２連結部３９を挿通するための第２貫通部４３を有しているニッパー３０の製造方法であって、一対のステー３１，３２、第１軸部材３３および第２軸部材３４はＮＣ加工(numerical control machining)により成形されていることを特徴とするニッパーの製造方法である。ニッパー３０の各構成については前述した通りであり詳述を省略する。 Further, another embodiment of the method for manufacturing nippers according to the present invention will be described.
The method of manufacturing nippers in this embodiment is to manufacture nippers having a pair of stays 31, 32 each having blade portions 2, 3 at their tip ends and grip operation portions 4, 5 at their rear ends, and a first shaft member 33 and a second shaft member 34 which rotatably support the pair of stays 31, 32 in a crossed state, and in which the blade portions 2, 3 can be opened and closed by operating the grip operation portions 4, 5, and at the crossing portion 35 of the pair of stays 31, 32, the first shaft member 33 has a first locking portion 36 for locking one of the stays 31 to be rotatable and a first fixing connecting portion 37 for fixing to the second shaft member 34, and the second shaft member 34 has a first locking portion 36 for locking the other stay 32 to be rotatable or non-rotatable. a second locking portion 38 for connecting the first locking portion 36 of the first shaft member 33 to the second locking portion 39 and a first fixing connecting portion 39 for connecting the first locking portion 36 of the first shaft member 33 to the first fixing connecting portion 37 of the first shaft member 33, one stay 31 has a first locking portion arrangement recess 40 for arranging the first locking portion 36 of the first shaft member 33 and a first through portion 41 for inserting the first fixing connecting portion 37 of the first shaft member 33, and the other stay 32 has a second locking portion arrangement recess 42 for arranging the second locking portion 38 of the second shaft member 34 and a second through portion 43 for inserting the second fixing connecting portion 39 of the second shaft member 34, and the method for manufacturing nippers is characterized in that the pair of stays 31, 32, the first shaft member 33 and the second shaft member 34 are formed by numerical control machining. The configurations of the nippers 30 are as described above and will not be described in detail.

この実施例のニッパー３０の製造方法によれば、各部品（一対のステー３１，３２、第１軸部材３３および第２軸部材３４）の成形工程が、例えば図９に示すように被加工物（この実施例ではステンレス板）６０に対するＮＣ加工により行われるため、部品成形時に熱処理が行われないことから冷却過程で各部品が変形することがなく、高精度、高品質の部品が形成されると共に成形型も不要である。また、各部品の組み立て工程にかしめ工程を要しないため、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができる。さらに、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程、先端側の交差合わせをして両切断刃をそれそれぞれ付し刃部を形成する工程も不要で、熟練を要することなくより容易にニッパー３０を作製することができる。 According to the manufacturing method of the nipper 30 of this embodiment, the forming process of each part (a pair of stays 31, 32, a first shaft member 33 and a second shaft member 34) is performed by NC processing of the workpiece (a stainless steel plate in this embodiment) 60, for example, as shown in FIG. 9. Therefore, since no heat treatment is performed during the forming of the parts, each part does not deform during the cooling process, and high-precision, high-quality parts are formed, and a forming mold is not required. In addition, since the assembly process of each part does not require a crimping process, the opening and closing of the pair of stays having a blade portion at the tip side and a gripping operation portion at the rear side is not affected by the crimping condition of the shaft end, and can be opened and closed in an optimal state. Furthermore, there is no need for a process of grinding and polishing the part protruding from the opening end of the shaft hole, or a process of crossing the tip side and attaching both cutting blades to each of them to form the blade portion, so the nipper 30 can be made more easily without requiring skill.

さらに、図１０ないし図１２に示した本発明のニッパーの製造方法の他の実施例について説明する。
この実施例のニッパーの製造方法も、先端側に刃部２，３を有し後部側に把持操作部４，５を有した一対のステー６，７と、一対のステー６，７を交差させた状態で回動可能に支持した軸部材８とを有し、一対のステー６，７の交差部９において、軸部材８は、一方のステー６を回動可能に係止するための係止部１０と他方のステー７に固定するための固定用第１連結部１１とを有し、他方のステー７は、軸部材８の固定用第１連結部１１と連結するための固定用第２連結部１２を有し、一方のステー６は、軸部材８の係止部１０を配するための係止部配置用凹部１３と軸部材８の固定用第１連結部１１を挿通するための貫通部１４を有しているニッパー１の製造方法であり、一対のステー６，７および軸部材８がＮＣ加工(numerical control machining)により成形されている点で前述したニッパー１の製造方法と同様である。 Further, another embodiment of the method for manufacturing nippers according to the present invention will be described with reference to FIGS.
The manufacturing method of nippers in this embodiment is also a manufacturing method of nippers 1 which has a pair of stays 6, 7 having blade portions 2, 3 at their tip ends and grip operating portions 4, 5 at their rear ends, and a shaft member 8 which rotatably supports the pair of stays 6, 7 in a crossed state, and at the crossing portion 9 of the pair of stays 6, 7, the shaft member 8 has a locking portion 10 for rotatably locking one of the stays 6 and a first fixing connecting portion 11 for fixing it to the other stay 7, the other stay 7 has a second fixing connecting portion 12 for connecting it to the first fixing connecting portion 11 of the shaft member 8, and one stay 6 has a locking portion arrangement recess 13 for arranging the locking portion 10 of the shaft member 8 and a through portion 14 for inserting the first fixing connecting portion 11 of the shaft member 8, and is similar to the manufacturing method of nippers 1 described above in that the pair of stays 6, 7 and the shaft member 8 are formed by NC (numerical control machining).

従って、この実施例のニッパーの製造方法によっても、各部品（一対のステー６，７および軸部材８）の成形工程が被加工物（この実施例ではステンレス板）６０に対するＮＣ加工により行われるため、部品成形時に熱処理が行われないことから冷却過程で各部品が変形することがなく、高精度、高品質の部品が形成されると共に成形型も不要である。また、各部品の組み立て工程にかしめ工程を要しないため、先端側に刃部を有し後部側に把持操作部を有した一対のステーの開閉が軸端部のかしめ具合により影響を受けることがなく最適な状態で開閉させることができる。さらに、軸孔の開口端から外部にはみ出した部分を研削・研磨する工程、先端側の交差合わせをして両切断刃をそれそれぞれ付し刃部を形成する工程も不要で、熟練を要することなくより容易にニッパー１を作製することができる。 Therefore, even with the manufacturing method of the nippers of this embodiment, the forming process of each part (the pair of stays 6, 7 and the shaft member 8) is performed by NC processing of the workpiece (stainless steel plate in this embodiment) 60, so that no heat treatment is performed during part forming, and therefore each part does not deform during the cooling process, and high-precision, high-quality parts are formed, and a forming mold is not required. In addition, since the assembly process of each part does not require a crimping process, the opening and closing of the pair of stays, which have a blade part at the tip side and a gripping operation part at the rear side, is not affected by the crimping condition of the shaft end, and can be opened and closed in an optimal state. Furthermore, there is no need for a process of grinding and polishing the part protruding from the opening end of the shaft hole, or a process of crossing the tip side and attaching both cutting blades to each of them to form the blade part, so the nippers 1 can be made more easily without requiring skill.

加えて、この実施例のニッパーの製造方法の第一の特徴は、ステー６，７の成形工程が、ステー（図１０ではステー６）を長さ方向に２本ずつ連ねて一体に削り出す第１成形工程を有している点である。図１０では、同種のステー（一方のステー６）を長さ方向に２連に連ねて１０本成形しているが、異なる種類のステー（一対のステー６，７）を長さ方向に２連に連ねて成形してもよく、他方のステー７（同種のステー）を長さ方向に２連に連ねて成形してしてもよい。また、この第１成形工程では、長さ方向に沿って２連のステーを削り出すのみならず、図１１に示すように、立体的な粗削りも同時に行われることでより効率的な成形が行われる。 In addition, a first feature of the manufacturing method of the nippers of this embodiment is that the forming process of the stays 6, 7 includes a first forming process in which the stays (stay 6 in FIG. 10) are lined up in pairs in the length direction and cut out as a single unit. In FIG. 10, ten stays of the same type (one stay 6) are lined up in pairs in the length direction, but different types of stays (a pair of stays 6, 7) may be lined up in pairs in the length direction, or the other stay 7 (the same type of stay) may be lined up in pairs in the length direction. Furthermore, in this first forming process, not only are two stays cut out in the length direction, but three-dimensional rough cutting is also performed at the same time, as shown in FIG. 11, to achieve more efficient forming.

さらに、この実施例のニッパーの製造方法の第二の特徴は、第１成形工程にて削り出した２連のステー（図１２では図１０と同様にステー６）の長さ方向の両側をそれぞれ把持固定した状態で成形する第２成形工程を有している点である。この第２成形工程は、マシニングセンターになどのＮＣ工作機械内の加工物把持固定部６１，６２にて第１成形工程にて削り出した２連のステーを把持固定された状態で刃部の成形等細部がＮＣ加工される。 Furthermore, a second feature of the manufacturing method of the nippers in this embodiment is that it includes a second forming process in which the two stays (stay 6 in FIG. 12, as in FIG. 10) machined in the first forming process are held and fixed on both sides in the length direction. In this second forming process, the two stays machined in the first forming process are held and fixed by workpiece holding and fixing parts 61, 62 in an NC machine tool such as a machining center, and the details such as the shaping of the blades are NC machined.

上記の第１成形工程および第２成形工程を経てステーを成形することで、２本のステーを同時に成形でき、片持ちで保持されるより振動が低減できるため、より精度が高いステーを極めて短時間（従来の１／４の時間）で効率的に作製することができる。 By molding the stays through the first and second molding processes described above, two stays can be molded simultaneously, and vibration is reduced compared to when they are held at one end, making it possible to efficiently produce stays with higher precision in an extremely short time (one-quarter of the time it would take conventionally).

１ニッパー
２，３刃部
４，５把持操作部
６，７一対のステー
６一方のステー
７他方のステー
８軸部材
９交差部
１０係止部
１１固定用第１連結部
１２固定用第２連結部
１３係止部配置用凹部
１４貫通部
１５，１６切断刃
１７，１８グリップ
１９，２０弾性部材
２１当接部
２２一方側凸部
２３他方側凸部
２４長溝
３０ニッパー
３１一方のステー
３２他方のステー
３３第１軸部材
３４第２軸部材
３５交差部
３６第１係止部
３７固定用第１連結部
３８第２係止部
３９固定用第２連結部
４０第１係止部配置用凹部
４１第１貫通部
４２第２係止部配置用凹部
４３第２貫通部 REFERENCE SIGNS LIST 1 Nippers 2, 3 Blade portions 4, 5 Grip operation portions 6, 7 Pair of stays 6 One stay 7 The other stay 8 Shaft member 9 Intersecting portion 10 Locking portion 11 First connecting portion for fixing 12 Second connecting portion for fixing 13 Recess for arranging locking portion 14 Penetrating portion 15, 16 Cutting blade
[0033] 17, 18 Grips 19, 20 Elastic member 21 Contact portion 22 One side convex portion 23 Other side convex portion 24 Long groove 30 Nipper 31 One stay 32 Other stay 33 First shaft member 34 Second shaft member 35 Intersecting portion 36 First locking portion 37 First connecting portion for fixing 38 Second locking portion 39 Second connecting portion for fixing 40 Recess for arranging first locking portion 41 First through portion 42 Recess for arranging second locking portion 43 Second through portion

Claims

A pair of stays each having a blade portion at a tip end and a gripping operation portion at a rear end, and a shaft member supporting the pair of stays in a crossed state, the blade portion being configured to be opened and closed by operating the gripping operation portion,
At the intersection of the pair of stays,
the shaft member has a locking portion for rotatably locking one of the stays and a first fixing coupling portion for fixing the one of the stays to the other stay,
the other stay has a second fixing connecting portion for connecting to the first fixing connecting portion of the shaft member,
the one stay has a locking portion arrangement recess for arranging the locking portion of the shaft member and a through-portion for inserting the first fixing coupling portion of the shaft member ,
The first fixing connection portion of the shaft member is configured as a convex portion or a concave portion,
The second fixing connecting portion of the other stay is configured as a concave portion or a convex portion that fits into the convex portion or the concave portion of the first fixing connecting portion of the shaft member .

The nippers according to claim 1, wherein the nippers have an abutment portion between the pair of stays on the rear inner side of the intersection of the pair of stays.

The nippers according to claim 1 are nipper-type nail clippers.

2. The nippers according to claim 1, further comprising a coil spring for biasing the pair of stays to an open state, the coil spring being disposed between the pair of stays within an intersection of the pair of stays with one end fixed to the one stay and the other end fixed to the other stay, a first coil spring arrangement groove being provided on the one stay side and a second coil spring arrangement groove being provided on the other stay side, and the coil spring being spirally arranged within the first coil spring arrangement groove and the second coil spring arrangement groove .

A pair of stays each having a blade portion at a tip end and a gripping operation portion at a rear end, and a shaft member supporting the pair of stays in a crossed state, the blade portion being configured to be opened and closed by operating the gripping operation portion,
At the intersection of the pair of stays,
the shaft member has a locking portion for rotatably locking one of the stays and a first fixing coupling portion for fixing the one of the stays to the other stay,
the other stay has a second fixing connecting portion for connecting to the first fixing connecting portion of the shaft member,
a first stay having a recess for accommodating the locking portion of the shaft member and a through-hole for inserting the first fixing connecting portion of the shaft member,
The stays and the shaft member are formed by NC machining, and the stay forming step in the nipper manufacturing method includes a first forming step in which the stays are connected in pairs in the longitudinal direction and cut out as a single unit, and a second forming step in which both longitudinal sides of the pair of stays cut out in the first forming step are gripped and fixed to form the two stays.

6. The method for manufacturing nippers according to claim 5 , wherein the first forming step cuts out the pair of stays so that the pair of stays are integrally connected in the length direction.