JP2014168495A

JP2014168495A - Shears

Info

Publication number: JP2014168495A
Application number: JP2013040424A
Authority: JP
Inventors: Takayoshi Tono; 高佳東野; Shigehiro Kawai; 重博河井; Takeshi Suzuki; 鈴木　　剛; Takeshi Teraguchi; 豪寺口
Original assignee: Kokuyo S&T Co Ltd
Current assignee: Kokuyo S&T Co Ltd
Priority date: 2013-02-06
Filing date: 2013-03-01
Publication date: 2014-09-18
Anticipated expiration: 2033-03-01
Also published as: AU2014215319A1; CN104411468A; CN104411468B; JP5611392B2; WO2014122961A1

Abstract

PROBLEM TO BE SOLVED: To facilitate cutting a corrugated board and a thick plastic sheet without increasing a load required for cutting near a blade edge while retaining the characteristics of conventional shears in which a load required for cutting on a blade bottom side becomes very small.SOLUTION: In a pair of shears including a pair of shear bodies having a handle part and blade pieces 31 and 32 having blade lines 31c and 32c, and a shaft 4 rotatably combining the pair of shear bodies, there are set curved blade bottom side areas 31c1 and 32c1 where a cross angle made by both blade lines 31c and 32c becomes gradually small as a cutting position recedes from the shaft 4 following a cutting operation, and blade edge side areas 31c2 and 32c2 where the cross angle makes nearly no change, or becomes gradually large as a cutting position recedes from the shaft 4.

Description

本発明は、オフィスや家庭で好適に用いられる鋏に関する。 The present invention relates to a bag suitably used in an office or home.

従来オフィスや家庭で好適に用いられる鋏の刃線は略直線状をなすものが多い。しかし、近年、このような形状の刃線を有する鋏においては、以下に述べるような不具合が存在することが判明してきている。すなわち、オフィスや家庭においても、段ボールやプラスチック製シート、或いはプラスチック製の梱包バンド等を切断する要望が存在するが、このような形状の刃線を有する鋏においては、図５のグラフの破線ｂに示すように、切断操作に伴って切断位置が前記軸から遠ざかるに従って両刃線がなす交差角度が漸次小さくなり、刃先近傍においては前記交差角度が小さくなる。そのため、同図に示すように、刃先近傍においては切断に要する荷重が大きく、このような要望に対応することが困難である。 Conventionally, many blade lines that are preferably used in offices and homes are substantially straight. However, in recent years, it has been found that the defects having the shape described below are present in the scissors having a blade line having such a shape. That is, even in offices and homes, there is a demand for cutting cardboard, plastic sheets, plastic packing bands, etc., but in the case of a ridge having such a shape, the broken line b in the graph of FIG. As shown in FIG. 3, the crossing angle formed by the two blade lines gradually decreases as the cutting position moves away from the axis with the cutting operation, and the crossing angle decreases in the vicinity of the blade edge. Therefore, as shown in the figure, the load required for cutting is large in the vicinity of the cutting edge, and it is difficult to meet such a demand.

一方、刃線の形状を全域にわたって従来の鋏よりも曲率半径が小さな円弧状とし、切断操作に伴って切断位置が刃先近傍に達した際の両刃線がなす交差角度を従来のものよりも大きくするとともに、刃線の略全域に亘って前記交差角度を略一定に設定している鋏が考えられている（例えば、特許文献１を参照）。このような構成の鋏では、図５のグラフの二点鎖線ｃに示すように、両刃線がなす交差角度は、切断位置に関わらず約１８〜３０°の範囲で略一定となるように設定されている。 On the other hand, the shape of the blade line is an arc shape with a smaller radius of curvature than the conventional scissors over the entire area, and the crossing angle formed by the two blade lines when the cutting position reaches the vicinity of the blade edge with the cutting operation is larger than the conventional one In addition, there has been considered a scissors in which the crossing angle is set to be substantially constant over substantially the entire area of the blade line (see, for example, Patent Document 1). In the bag having such a configuration, as shown by a two-dot chain line c in the graph of FIG. 5, the crossing angle formed by the two blade lines is set to be substantially constant in a range of about 18 to 30 ° regardless of the cutting position. Has been.

ところで、刃線が略直線状をなす従来の鋏においては、切断位置が刃線の軸に近い側の端部である場合は、前記図５に示すように、前記交差角度は９０°近くの大きな角度となり、刃元近傍において切断に要する荷重を小さなものにできるのに対して、前段で述べた刃線の形状を有する鋏では、両刃線がなす交差角度は、切断位置に関わらず１８〜３０°で略一定であることから、刃元側を利用してプラスチック製シートや梱包バンド等を切断する使用態様等には十分対応することができないという別の不具合が発生しうる。 By the way, in the conventional scissors in which the blade line is substantially straight, when the cutting position is the end portion on the side close to the axis of the blade line, the crossing angle is close to 90 ° as shown in FIG. Whereas the angle becomes large and the load required for cutting in the vicinity of the cutting edge can be made small, in the case of the scissors having the shape of the cutting line described in the previous stage, the crossing angle formed by both cutting lines is 18 to regardless of the cutting position. Since it is substantially constant at 30 °, another problem that it is not possible to sufficiently cope with a usage mode in which a cutting edge side is used to cut a plastic sheet, a packing band, or the like may occur.

実開昭４８−８６４８２号公報Japanese Utility Model Publication No. 48-86482

本発明は以上の点に着目し、刃元側で交差角度が従来の鋏と同様に大きなものとなる従来の鋏の特性は維持しつつ、刃先近傍においても切断に要する荷重が大きくなることなく段ボールやプラスチック製シート、或いはプラスチック製の梱包バンド等を容易に切断できるようにする要望に対応することを目的とする。 The present invention pays attention to the above points, and maintains the characteristics of the conventional scissors in which the crossing angle is as large as that of the conventional scissors on the blade base side, without increasing the load required for cutting even in the vicinity of the cutting edges. The object is to meet the demand for easily cutting cardboard, plastic sheets, plastic packing bands, and the like.

以上の課題を解決すべく、本発明に係る鋏は、以下に述べるような構成を有する。すなわち本発明に係る鋏は、柄部、及び刃線を有する刃片をそれぞれ備えた対をなす鋏身と、これら対をなす鋏身を回動自在に結合する軸とを有する鋏であって、切断操作に伴って切断位置が前記軸から遠ざかるに従って両刃線がなす交差角度が漸次小さくなる曲線状の刃元側領域と、この刃元側領域の刃先側に隣接し前記交差角度が略変化しないか又は切断位置が前記軸から遠ざかるに従って前記交差角度が大きくなる刃先側領域とが設定されている。 In order to solve the above problems, the bag according to the present invention has a configuration as described below. That is, the scissors according to the present invention are scissors having a pair of slimmings each having a handle portion and a blade piece having a blade line, and a shaft that rotatably couples the pairing slimmings. The crossing angle formed by the two blade lines gradually decreases as the cutting position moves away from the axis with the cutting operation, and the crossing angle changes substantially adjacent to the cutting edge side of the cutting edge side region. The cutting edge side region where the crossing angle increases as the cutting position moves away from the axis is set.

このようなものであれば、刃元側領域においては交差角度を従来の鋏と同様に大きなものとしつつ、刃先側領域においては前記交差角度が略変化しないか又は切断位置が前記軸から遠ざかるに従って前記交差角度が大きくなるので、刃先側領域においても切断に要する荷重が極度に大きくなることがない構成を実現しやすい。 If this is the case, the crossing angle is made large in the cutting edge side region as in the case of the conventional scissors, while the crossing angle does not substantially change in the cutting edge side region or the cutting position moves away from the axis. Since the crossing angle increases, it is easy to realize a configuration in which the load required for cutting does not become extremely large even in the blade edge region.

このような鋏において、刃先近傍において切断に要する荷重をより小さくするための構成として、前記刃先側領域が、前記刃元側領域との境界付近に切断位置が前記軸から遠ざかるに従って前記交差角度が急激に大きくなる交差角度急変部分を有するものが挙げられる。 In such a scissors, as a configuration for reducing the load required for cutting in the vicinity of the cutting edge, the crossing angle increases as the cutting position moves away from the axis near the boundary between the cutting edge side area and the cutting edge side area. One having an abrupt change in the crossing angle that suddenly increases can be mentioned.

上述したような効果を得るための具体的な鋏の構成の一例として、前記柄部が使用者の指を所定の指掛け領域内に掛けておくための指掛け部を有し、少なくとも一方の刃線に前記刃元側領域と前記刃先側領域とが設定されており、前記刃先側領域が、前記交差角度が全域に亘って前記刃元側領域との境界における前記交差角度よりも大きくなるものであるものが挙げられる。 As an example of a specific heel configuration for obtaining the effects as described above, the handle portion has a finger hook portion for hanging a user's finger in a predetermined finger hook region, and at least one blade line The cutting edge side area and the cutting edge side area are set, and the cutting edge side area of the cutting edge side area is larger than the intersection angle at the boundary with the cutting edge side area over the entire area. Some are listed.

前記刃先側領域において切断に要する荷重が切断位置にかかわらず略一定となるようにするための具体的な構成として、前記刃先側領域が、それぞれ曲率半径の異なる複数の小径曲線部分を含むものが挙げられる。 As a specific configuration for making the load required for cutting in the cutting edge side region substantially constant regardless of the cutting position, the cutting edge side region includes a plurality of small diameter curved portions having different curvature radii. Can be mentioned.

切断操作に伴って切断位置が刃先近傍の領域で前記軸から遠ざかるに従って両刃線がなす交差角度を急激に変化させることなく刃先近傍においても段ボール等を切断する使用態様に対応できるようにするための構成として、前記複数の小径曲線部分のうち、刃元側領域に最も近い小径曲線部分の曲率半径が他の小径曲線部分の曲率半径よりも小さく、この小径曲線部分が、切断位置が前記軸から遠ざかるに従って前記交差角度が急激に大きくなる交差角度急変部分であるものや、前記刃先側領域が前記小径曲線部分を３つ以上含むものであって、刃元側領域に近い側から数えて第２番目の小径曲線部分の曲率半径が他の小径曲線部分の曲率半径よりも小さく、この小径曲線部分が、切断位置が前記軸から遠ざかるに従って前記交差角度が急激に大きくなる交差角度急変部分であるものが挙げられる。 Along with the cutting operation, the cutting position is in the region near the blade edge, so that the crossing angle formed by the two blade lines can be handled in the vicinity of the blade edge without suddenly changing as the distance between the two blade lines increases. As a configuration, the curvature radius of the small diameter curve portion closest to the cutting edge side region among the plurality of small diameter curve portions is smaller than the curvature radius of the other small diameter curve portions, and this small diameter curve portion has a cutting position from the axis. A crossing angle sudden change portion where the crossing angle suddenly increases with increasing distance, or the cutting edge side region includes three or more small-diameter curve portions, and is counted from the side close to the cutting edge side region. The radius of curvature of the first small-diameter curve portion is smaller than the curvature radius of the other small-diameter curve portions, and this small-diameter curve portion has a sharper intersection angle as the cutting position moves away from the axis. What is larger cross angular break moieties.

上述した効果をより好適に得るには、双方の刃線に、前記刃元側領域及び刃先側領域が設定されているものが望ましい。 In order to obtain the above-described effects more suitably, it is desirable that the blade base side region and the blade tip side region are set on both blade lines.

刃元側領域において従来の鋏と同様の使用感を得ることができるようにするための具体的な構成として、前記交差角度の最大値が９０°以上であるものが挙げられる。 As a specific configuration for obtaining the same feeling of use as that of a conventional scissors in the blade base region, one having a maximum value of the crossing angle of 90 ° or more can be cited.

刃先側領域において切断に要する荷重を極度に大きくすることなく切断に要する荷重が切断位置にかかわらず略一定となるようにするための具体的な構成として、前記刃元側領域と前記刃先側領域との境界における前記交差角度が１８°以上であるものが挙げられる。 As a specific configuration for making the load required for cutting in the cutting edge side region substantially constant regardless of the cutting position without extremely increasing the load required for cutting, the cutting edge side region and the cutting edge side region The said crossing angle in the boundary with is 18 degrees or more.

切断位置が前記軸から遠ざかるに従って両刃線がなす交差角度を大きくするための好適な構成として、前記小径曲線部分の一つの曲率半径が、該小径曲線部分を含む刃線の全長よりも小さいものが挙げられる。 As a preferred configuration for increasing the intersecting angle formed by the two blade lines as the cutting position moves away from the axis, one of the small-diameter curve portions has a radius of curvature smaller than the entire length of the blade line including the small-diameter curve portions. Can be mentioned.

なお、本発明において、「曲線状」とは、単一の円弧や複数の円弧を繋ぎ合わせたものに限らず、二次曲線や三次曲線等、他の形状の曲線全般をも含む概念である。また、「曲率半径」とは、円弧状の部分においては該円弧の半径、円弧状以外の形状をなす部分については当該部分の形状を円弧により近似した場合の円弧の半径をそれぞれ示す概念である。 In the present invention, the “curved shape” is not limited to a single arc or a combination of a plurality of arcs, but includes a general curve including other shapes such as a quadratic curve and a cubic curve. . In addition, the “curvature radius” is a concept indicating the radius of the arc in the arc-shaped portion, and the radius of the arc when the shape of the portion other than the arc shape is approximated by an arc in the arc-shaped portion. .

本発明によれば、刃元側で交差角度が従来の鋏と同様に大きなものとなる従来の鋏の特性は維持しつつ、刃先近傍においても段ボールやプラスチック製シート、或いはプラスチック製の梱包バンド等を容易に切断できるようにする要望に対応することができる。 According to the present invention, while maintaining the characteristics of the conventional scissors whose crossing angle is as large as that of the conventional scissors on the blade base side, cardboard, plastic sheets, plastic packing bands, etc. in the vicinity of the cutting edges, etc. It is possible to meet the demand for enabling easy cutting.

本発明の第一実施形態に係る鋏を示す斜視図。The perspective view which shows the scissors which concern on 1st embodiment of this invention. 同実施形態に係る鋏を示す平面図。The top view which shows the heel which concerns on the same embodiment. 同実施形態に係る鋏の動刃を示す平面図。The top view which shows the moving blade of the scissors which concern on the same embodiment. 同実施形態に係る鋏の静刃を示す平面図。The top view which shows the stationary blade of the scissors which concern on the same embodiment. 同実施形態に係る鋏の刃線間角度と切断荷重との関係を示す図。The figure which shows the relationship between the angle between blade line | wires of the scissors which concern on the same embodiment, and cutting load. 本発明の第二実施形態に係る鋏を示す斜視図。The perspective view which shows the scissors which concern on 2nd embodiment of this invention. 同実施形態に係る鋏を示す平面図。The top view which shows the heel which concerns on the same embodiment. 同実施形態に係る鋏の動刃を示す平面図。The top view which shows the moving blade of the scissors which concern on the same embodiment. 同実施形態に係る鋏の静刃を示す平面図。The top view which shows the stationary blade of the scissors which concern on the same embodiment. 同実施形態に係る鋏の刃線間角度と切断荷重との関係を示す図。The figure which shows the relationship between the angle between blade line | wires of the scissors which concern on the same embodiment, and cutting load. 本発明の他の実施形態に係る鋏の動刃を示す平面図。The top view which shows the moving blade of the scissors concerning other embodiment of this invention. 本発明の他の実施形態に係る鋏の動刃を示す平面図。The top view which shows the moving blade of the scissors concerning other embodiment of this invention. 図１２におけるＡ−Ａ断面図。AA sectional drawing in FIG. 本発明の他の実施形態に係る鋏の動刃を示す平面図。The top view which shows the moving blade of the scissors concerning other embodiment of this invention. 図１４におけるＢ−Ｂ断面図。BB sectional drawing in FIG. 本発明の他の実施形態に係る鋏の動刃を示す平面図。The top view which shows the moving blade of the scissors concerning other embodiment of this invention. 本発明の他の実施形態に係る鋏の刃の横断面図。The cross-sectional view of the scissors blade according to another embodiment of the present invention. 本発明の他の実施形態に係る鋏の刃の横断面図。The cross-sectional view of the scissors blade according to another embodiment of the present invention. 本発明の他の実施形態に係る鋏を示す斜視図。The perspective view which shows the scissors which concern on other embodiment of this invention. 本発明の他の実施形態に係る鋏を示す斜視図。The perspective view which shows the scissors which concern on other embodiment of this invention. 本発明の他の実施形態に係る鋏を示す斜視図。The perspective view which shows the scissors which concern on other embodiment of this invention.

本発明の第一実施形態を図１〜図５を参照しつつ以下に示す。 A first embodiment of the present invention will be described below with reference to FIGS.

本実施形態に係る鋏Ｈは、図１及び図２に示すように、第１の刃片たる動刃３１を有する第１の鋏身１１と、前記動刃３１と対をなす第２の刃片たる静刃３２を有する第２の鋏身１２とを、支軸４を中心に回動自在に結合してなる。 As shown in FIGS. 1 and 2, the scissors H according to this embodiment includes a first slimming body 11 having a moving blade 31 as a first blade piece, and a second blade that forms a pair with the moving blade 31. A second slimming body 12 having a single stationary blade 32 is coupled to be rotatable about a support shaft 4.

前記第１の鋏身１１は、前記図１及び図２に示すように、第１の柄部２１と、この第１の柄部２１の前端側に基端側を挿入して取り付けられる前記動刃３１とから構成される。 As shown in FIGS. 1 and 2, the first slimming body 11 is attached by inserting a first handle portion 21 and a proximal end side to the front end side of the first handle portion 21. The blade 31 is configured.

前記第１の柄部２１は、使用者が親指を挿入するための所定の指掛け領域たる第１の指掛環２１ｂ内に掛けておくための指掛け部２１ａを備えている。そして、上述したように、この第１の柄部２１の前端側に前記動刃３１の基端側を挿入して取り付けるようにしている。 The first handle portion 21 includes a finger hook portion 21a for hanging in a first finger hook ring 21b, which is a predetermined finger hook region for a user to insert a thumb. As described above, the base end side of the moving blade 31 is inserted and attached to the front end side of the first handle 21.

前記動刃３１は、鋏Ｈを用いて紙葉類等を切断する際に、紙葉類等の下方に挿入されるものである。この動刃３１は、ステンレスにより構成した金属板を素材とし、全体を一体的にプレス成形することにより形成してなる板状のものである。この金属板の厚さ寸法は任意であり、本実施形態では１．８ｍｍに設定している。また本実施形態では、この動刃３１は、図１〜図３に示すように、前記静刃３２と摺動可能かつ平坦な刃裏面３１ａと前記静刃３２と反対側に向かう面である外面すなわち刃表面３１ｂとの間に、刃線３１ｃを形成している。この刃線３１ｃの全長は、本実施形態では７０ｍｍに設定している。これら刃裏面３１ａと刃表面３１ｂとの間の前記刃線３１ｃにおける刃角度θは、本実施形態では４０°に設定している。さらに、この動刃３１は、前記刃線３１ｃと反対側の側端縁に形成した刃峰３１ｄと、先端部に位置する刃先３１ｅと、基端部すなわち支軸４近傍に位置する刃元３１ｆとを具備する。そして、前述したように、この動刃３１に、支軸４を介して前記第２の鋏身１２を構成する静刃３２を取り付けている。 The moving blade 31 is inserted below the paper sheet or the like when the paper sheet or the like is cut using the scissors H. The moving blade 31 is a plate-shaped member that is formed by integrally pressing the whole using a metal plate made of stainless steel as a raw material. The thickness dimension of this metal plate is arbitrary, and is set to 1.8 mm in this embodiment. Moreover, in this embodiment, as shown in FIGS. 1 to 3, the moving blade 31 is an outer surface that is a surface that faces the opposite side of the stationary blade 32 and a blade back surface 31 a that is slidable and flat with the stationary blade 32. That is, the blade line 31c is formed between the blade surface 31b. The total length of the blade line 31c is set to 70 mm in this embodiment. In this embodiment, the blade angle θ in the blade line 31c between the blade back surface 31a and the blade surface 31b is set to 40 °. Further, the moving blade 31 includes a blade peak 31d formed on the side edge opposite to the blade line 31c, a blade tip 31e positioned at the distal end, and a blade base 31f positioned in the vicinity of the base end, that is, the support shaft 4. It comprises. As described above, the stationary blade 32 constituting the second slimming body 12 is attached to the moving blade 31 via the support shaft 4.

一方、第２の鋏身１２は、前記図１及び図２に示すように、第２の柄部２２と、この第２の柄部２２の前端側に基端側を挿入して取り付けられる第２の刃片たる前記静刃３２とから構成される。 On the other hand, as shown in FIG. 1 and FIG. 2, the second slimming body 12 is attached by inserting the base end side into the second handle portion 22 and the front end side of the second handle portion 22. It is comprised from the said stationary blade 32 which is 2 blade pieces.

前記第２の柄部２２は、使用者の人差し指、中指、又は薬指を所定の指掛け領域たる第１の指掛環２２ｂ内に掛けておくための指掛け部２２ａを備えている。そして、上述したように、この第２の柄部２２の前端側に前記静刃３２の基端側を挿入して取り付けるようにしている。 The second handle 22 includes a finger hook 22a for hooking a user's index finger, middle finger, or ring finger into a first finger ring 22b that is a predetermined finger hook region. As described above, the base end side of the stationary blade 32 is inserted and attached to the front end side of the second handle portion 22.

前記静刃３２は、前記動刃３１と対をなし、鋏Ｈを用いて紙葉類等を切断する際に、紙葉類等の上方に位置するものである。この静刃３２も、前記動刃３１と同様に、ステンレスにより構成した金属板を素材とし、全体を一体的にプレス成形することにより形成してなる板状のものである。また本実施形態では、この静刃３２は、図１、図２及び図４に示すように、前記動刃３１と摺動可能かつ平坦な刃裏面３２ａと前記動刃３１と反対側に向かう面である外面すなわち刃表面３２ｂとの間に、刃線３２ｃを形成している。この刃線３２ｃの全長も、本実施形態では７０ｍｍに設定している。これら刃裏面３２ａと刃表面３２ｂとの間の前記刃線３２ｃにおける刃角度θも、本実施形態では５０°に設定している。さらに、この静刃３２は、前記刃線３２ｃと反対側の側端縁に形成した刃峰３２ｄと、先端部に位置する刃先３２ｅと、基端部すなわち支軸４近傍に位置する刃元３２ｆとを具備する。なお、前記刃角度θは、４０°〜５０°の範囲で任意に設定してよいが、前記刃角度θを４０°より小さくすると刃こぼれと呼ばれる現象が発生しやすくなる。 The stationary blade 32 is paired with the moving blade 31 and is positioned above the paper sheet or the like when cutting the paper sheet or the like using the ridge H. Similarly to the moving blade 31, the stationary blade 32 is a plate formed by using a metal plate made of stainless steel as a raw material and integrally press-molding the whole. In this embodiment, as shown in FIGS. 1, 2, and 4, the static blade 32 is slidable with the moving blade 31 and is a flat blade back surface 32 a and a surface facing the opposite side of the moving blade 31. The blade line 32c is formed between the outer surface, that is, the blade surface 32b. The total length of the blade line 32c is also set to 70 mm in this embodiment. The blade angle θ in the blade line 32c between the blade back surface 32a and the blade surface 32b is also set to 50 ° in the present embodiment. Further, the stationary blade 32 includes a blade ridge 32d formed on the side edge opposite to the blade line 32c, a blade tip 32e positioned at the distal end, and a blade base 32f positioned near the base end, that is, the support shaft 4. It comprises. The blade angle θ may be arbitrarily set within a range of 40 ° to 50 °. However, when the blade angle θ is smaller than 40 °, a phenomenon called blade spillage is likely to occur.

しかして本実施形態では、これら動刃３１及び静刃３２に、切断操作に伴って切断位置が前記軸から遠ざかるに従って両刃線３１ｃ、３２ｃがなす交差角度が漸次小さくなる曲線状の刃元側領域３１ｃ１、３２ｃ１と、この刃元側領域の刃先側に隣接し前記交差角度が略変化しないか又は切断位置が前記軸から遠ざかるに従って前記交差角度が大きくなる刃先側領域３１ｃ２、３２ｃ２とをそれぞれ設定している。換言すれば、前記動刃３１及び前記静刃３２双方の刃線３１ｃ、３２ｃに、切断操作に伴って切断位置が前記軸４から遠ざかるに従って両刃線３１ｃ、３２ｃがなす交差角度が漸次小さくなる曲線状の刃元側領域３１ｃ１、３２ｃ１と、この刃元側領域３１ｃ１、３２ｃ１の刃先３１ｅ、３２ｅ側に隣接し前記交差角度が全域に亘って前記刃元側領域３１ｃ１、３２ｃ１との境界における前記交差角度よりも大きい刃先側領域３１ｃ２、３２ｃ２とを設定している。以下、動刃３１の刃線３１ｃ及び前記静刃３２の刃線３２ｃは全く同一の形状を有するので、動刃３１の刃線３１ｃのみについて説明する。 Therefore, in the present embodiment, the curved blade base region of the moving blade 31 and the stationary blade 32 has a gradually decreasing crossing angle between the blade lines 31c and 32c as the cutting position moves away from the axis in accordance with the cutting operation. 31c1 and 32c1, and cutting edge side areas 31c2 and 32c2 that are adjacent to the cutting edge side of the cutting edge side area and the crossing angle does not substantially change or the crossing angle increases as the cutting position moves away from the axis, respectively. ing. In other words, the curved line 31c, 32c of both the moving blade 31 and the stationary blade 32 is a curve in which the intersecting angle formed by the two blade lines 31c, 32c gradually decreases as the cutting position moves away from the shaft 4 with the cutting operation. The blade edge side regions 31c1 and 32c1 and the blade edge side regions 31c1 and 32c1 are adjacent to the blade edges 31e and 32e, and the crossing angle extends over the entire area at the boundary between the blade edge side regions 31c1 and 32c1. Cutting edge side regions 31c2 and 32c2 larger than the angle are set. Hereinafter, since the blade line 31c of the moving blade 31 and the blade line 32c of the stationary blade 32 have exactly the same shape, only the blade line 31c of the moving blade 31 will be described.

前記刃元側領域３１ｃ１の曲率半径は、本実施形態では４３６６ｍｍである。そして、この刃元側領域３１ｃ１の刃先３１ｅ側には、前記刃先側領域３１ｃ２が隣接している。 The radius of curvature of the blade base side region 31c1 is 4366 mm in this embodiment. The cutting edge side region 31c2 is adjacent to the cutting edge 31e side of the cutting edge side region 31c1.

前記刃先側領域３１ｃ２は、前記刃元側領域３１ｃ１に近い側から順に、それぞれ曲率半径の異なる複数、より具体的には第１〜第５の小径曲線部分３１ｃａ〜３１ｃｅを含んでいる。これら第１〜第５の小径曲線部分３１ｃａ〜３１ｃｅの曲率半径はいずれも前記刃元側領域３１ｃ１の曲率半径よりも小さい。さらに詳述すると、第１の小径曲線部分３１ｃａの曲率半径は１７０ｍｍであり、第２の小径曲線部分３１ｃｂの曲率半径は４０ｍｍである。以下、第３〜第５の小径曲線部分３１ｃｃ〜３１ｃｅの曲率半径は、第３の小径曲線部分３１ｃｃから順に、それぞれ１１４ｍｍ、２８２ｍｍ、２０００ｍｍである。すなわち本実施形態では、第２の小径曲線部分３１ｃｂの曲率半径は刃線３１ｃの全長よりも小さく、また、他の小径曲線部分すなわち第１の小径曲線部分３１ｃａ及び第３〜第５の小径曲線部分３１ｃｃ〜３１ｃｅの曲率半径よりも小さい。なお、以下の説明において、静刃３２の各部には、上述した動刃３１における対応する部位と同一の名称及び先頭の「３１」を「３２」に変更した符号を付している。 The cutting edge side region 31c2 includes a plurality of different curvature radii, more specifically, first to fifth small-diameter curve portions 31ca to 31ce in order from the side close to the cutting edge side region 31c1. The curvature radii of the first to fifth small-diameter curve portions 31ca to 31ce are all smaller than the curvature radius of the blade base side region 31c1. More specifically, the curvature radius of the first small-diameter curve portion 31ca is 170 mm, and the curvature radius of the second small-diameter curve portion 31cb is 40 mm. Hereinafter, the radii of curvature of the third to fifth small-diameter curve portions 31cc to 31ce are 114 mm, 282 mm, and 2000 mm, respectively, in order from the third small-diameter curve portion 31cc. That is, in this embodiment, the radius of curvature of the second small diameter curve portion 31cb is smaller than the entire length of the blade line 31c, and other small diameter curve portions, that is, the first small diameter curve portion 31ca and the third to fifth small diameter curves. It is smaller than the radius of curvature of the portions 31cc to 31ce. In the following description, each part of the stationary blade 32 is given the same name as the corresponding portion in the above-described moving blade 31 and the reference numeral in which the leading “31” is changed to “32”.

本実施形態において、刃線３１ｃ、３２ｃ間の交差角度及び切断に要する荷重は、切断位置が前記軸４から遠ざかるに従って、図５を参照しつつ以下に述べるように変化する。 In the present embodiment, the crossing angle between the blade lines 31c and 32c and the load required for cutting change as described below with reference to FIG. 5 as the cutting position moves away from the shaft 4.

両刃線３１ｃ、３２ｃの軸４に近い側の端すなわち刃元３１ｆ、３２ｆ側の端同士が交差している状態では、刃線３１ｃ、３２ｃ間の交差角度は、図５のグラフの実線ａに示すように、９０°である。以下、切断操作に伴って切断位置は刃元側領域３１ｃ１、３２ｃ１内を前記軸４から遠ざかる方向に移動する。両刃線３１ｃ、３２ｃがなす交差角度は、切断位置が前記軸４から遠ざかるに従って漸次小さくなり、刃先側領域３１ｃ２、３２ｃ２との境界で極小値、具体的には約２３度となる。また、切断に要する荷重は、切断位置が前記軸４から遠ざかるに従って漸次大きくなる。 In the state where the ends of the two blade lines 31c and 32c near the axis 4, that is, the ends of the blade bases 31f and 32f intersect each other, the intersecting angle between the blade lines 31c and 32c is the solid line a in the graph of FIG. As shown, it is 90 °. Hereinafter, the cutting position moves in the direction away from the shaft 4 in the blade base region 31c1, 32c1 with the cutting operation. The crossing angle formed by the two blade lines 31c and 32c gradually decreases as the cutting position moves away from the axis 4, and becomes a minimum value, specifically about 23 degrees, at the boundary with the blade edge regions 31c2 and 32c2. Further, the load required for cutting gradually increases as the cutting position moves away from the shaft 4.

それから、切断位置が刃先側領域３１ｃ２、３２ｃ２内に移動すると、切断位置が前記第１〜第３の小径曲線部分３１ｃａ〜３１ｃｃ、３２ｃａ〜３２ｃｃ内にある際には、切断位置が前記軸４から遠ざかるに従って、前記図５のグラフの実線ａに示すように、両刃線がなす交差角度は前記極小値から漸次大きくなる。特に、切断位置が前記第２の小径曲線部分３１ｃｂ、３２ｃｂに位置する際には、切断位置が前記軸から遠ざかるに従って、両刃線がなす交差角度が急速に大きくなる。すなわち、前記第２の小径曲線部分３１ｃｂ、３２ｃｂは、請求項中の交差角度急変部分である。この第２の小径曲線部分３１ｃｂ、３２ｃｂ（交差角度急変部分）は、本実施形態では、刃線３１ｃ、３２ｃの基端（刃元側の端）から４１．４〜４４．８ｍｍの位置すなわち刃線の全長の約５９％〜約６４％の位置に設定している。より具体的には、第１の小径曲線部分３１ｃａ、３２ｃａと第２の小径曲線部分３１ｃｂ、３２ｃｂとの境界では前記交差角度が約２４度であるのに対し、第２の小径曲線部分３１ｃｂ、３２ｃｂと第３の小径曲線部分３１ｃｃ、３２ｃｃとの境界では前記交差角度が約３２度である。そして、切断位置が前記第３の小径曲線部分３１ｃｃ、３２ｃｃと第４の小径曲線部分３１ｃｄ、３２ｃｄとの境界に達した際に、前記交差角度が極大値、具体的には約３５度となる。その後、切断位置が前記軸４から遠ざかるに従って、両刃線がなす交差角度は３０度以上を保ちつつ漸次小さくなる。一方、切断に要する荷重は、切断位置が刃先側領域３１ｃ２、３２ｃ２にある場合には、前記図５のグラフの実線ａに示すように、切断位置にかかわらず略一定となる。なお、切断に要する荷重の測定は、以下に述べるような方法により測定している。すなわち、切断対象物である段ボールが動刃３１及び静刃３２とそれぞれなす距離が等しくなるように切断対象物である段ボールを配した状態で、第１及び第２の柄部２１、２２の指掛け部２１ａ、２２ａに図示しない荷重測定装置の入力端を、前記軸４及び前記両入力端を頂点とする三角形が二等辺三角形となる状態にそれぞれセットし、これら荷重測定装置の両入力端を相寄る方向に移動させて切断対象物を切断しつつ、換言すれば前記三角形が二等辺三角形となる状態を保ったまま前記両入力端をそれぞれ移動させて切断対象物を切断しつつ、切断に要する荷重を測定するようにしている。 Then, when the cutting position moves into the cutting edge side regions 31c2 and 32c2, when the cutting position is within the first to third small diameter curved portions 31ca to 31cc and 32ca to 32cc, the cutting position is separated from the shaft 4. As the distance increases, as shown by the solid line a in the graph of FIG. 5, the crossing angle formed by the two blade lines gradually increases from the minimum value. In particular, when the cutting position is located at the second small-diameter curve portions 31cb and 32cb, the crossing angle formed by the two blade lines rapidly increases as the cutting position moves away from the axis. That is, the second small-diameter curve portions 31cb and 32cb are intersection angle sudden change portions in the claims. In the present embodiment, the second small-diameter curve portions 31cb, 32cb (intersection angle sudden change portions) are positions 41.4 to 44.8 mm from the base ends (ends on the blade base side) of the blade lines 31c, 32c, that is, the blades. The position is set at about 59% to about 64% of the total length of the line. More specifically, the crossing angle is about 24 degrees at the boundary between the first small-diameter curve portions 31ca, 32ca and the second small-diameter curve portions 31cb, 32cb, whereas the second small-diameter curve portion 31cb, The intersection angle is about 32 degrees at the boundary between 32cb and the third small-diameter curve portions 31cc, 32cc. When the cutting position reaches the boundary between the third small-diameter curve portions 31cc and 32cc and the fourth small-diameter curve portions 31cd and 32cd, the intersection angle becomes a maximum value, specifically about 35 degrees. . Thereafter, as the cutting position moves away from the axis 4, the crossing angle formed by the two blade lines gradually decreases while maintaining 30 degrees or more. On the other hand, the load required for cutting is substantially constant regardless of the cutting position as shown by the solid line a in the graph of FIG. 5 when the cutting position is in the blade edge region 31c2, 32c2. Note that the load required for cutting is measured by the method described below. That is, the first and second handle portions 21 and 22 are hooked with the corrugated cardboard as the cutting object arranged so that the distances formed between the corrugated cardboard as the cutting object and the moving blade 31 and the stationary blade 32 are equal. The input ends of the load measuring device (not shown) are set in the portions 21a and 22a so that the triangles having the apexes 4 and the two input ends as vertices become isosceles triangles. The cutting object is cut by moving in the approaching direction, in other words, the two input ends are moved to cut the cutting object while maintaining the state that the triangle is an isosceles triangle, and the cutting is required. The load is measured.

以上に述べたように、本実施形態によれば、刃元側領域３１ｃ１、３２ｃ１においては交差角度を従来の鋏と同様に大きなものとしつつ、刃先側領域３１ｃ２、３２ｃ２においては前記交差角度を全域に亘って前記刃元側領域３１ｃ１、３２ｃ１との境界における前記交差角度よりも大きくし、さらに切断に要する荷重が切断位置にかかわらず略一定となるようにしていることで、刃先側領域３１ｃ２、３２ｃ２のどの領域においても切断に要する荷重が刃元側領域３１ｃ１、３２ｃ１との境界における前記荷重と略等しくなる。従って、刃先３１ｅ、３２ｅ近傍の領域をも段ボールやプラスチック製シート、或いはプラスチック製の梱包バンド等を切断する目的に使用できる。 As described above, according to the present embodiment, the crossing angle is made large in the cutting edge side regions 31c1 and 32c1 as in the conventional scissors, while the crossing angle is set in the entire region in the cutting edge side regions 31c2 and 32c2. The blade edge side region 31c2, the blade edge side region 31c1, 32c1 is larger than the crossing angle at the boundary, and the load required for cutting is substantially constant regardless of the cutting position. In any region of 32c2, the load required for cutting is substantially equal to the load at the boundary between the blade base region 31c1 and 32c1. Therefore, the area near the blade edges 31e and 32e can also be used for the purpose of cutting cardboard, plastic sheets, plastic packing bands, or the like.

また、前記刃先側領域３１ｃ２、３２ｃ２を、それぞれ曲率半径の異なる第１〜第５の小径曲線部分３１ｃａ〜３１ｃｅ、３２ｃａ〜３２ｃｅを含むものとしているので、前記刃先側領域３１ｃ２、３２ｃ２において切断に要する荷重が切断位置にかかわらず略一定となる。 In addition, the cutting edge side regions 31c2 and 32c2 include first to fifth small diameter curved portions 31ca to 31ce and 32ca to 32ce having different radii of curvature, respectively, so that cutting is required in the cutting edge side regions 31c2 and 32c2. The load is substantially constant regardless of the cutting position.

さらに、前記第２の小径曲線部分３１ｃｂ、３２ｃｂの曲率半径が前記第１〜第５の小径曲線部分３１ｃａ〜３１ｃｅ、３２ｃａ〜３２ｃｅのうちで最小であるので、切れ味を急変させることなく、また、切断操作に伴い切断位置が前記軸４から遠ざかるに従って刃先３１ｅ、３２ｅ近傍の領域で両刃線がなす交差角度を急激に変化させることなく、刃先３１ｅ、３２ｅ近傍の領域をも段ボールやプラスチック製シート、或いはプラスチック製の梱包バンド等を切断する目的に使用できる構成を好適に実現できる。 Furthermore, since the radius of curvature of the second small-diameter curve portions 31cb and 32cb is the smallest of the first to fifth small-diameter curve portions 31ca to 31ce and 32ca to 32ce, without sharply changing the sharpness, As the cutting position moves away from the axis 4 with the cutting operation, the region near the blade edges 31e, 32e is also corrugated or plastic sheet without abruptly changing the crossing angle formed by the two blade lines in the region near the blade edges 31e, 32e. Or the structure which can be used for the objective of cut | disconnecting a plastic packaging band etc. can be implement | achieved suitably.

加えて、双方の刃線３１ｃ、３２ｃに前記刃元側領域３１ｃ１、３２ｃ１及び刃先側領域３１ｃ２、３２ｃ２を設定しているので、各刃線の刃先側領域３１ｃ２、３２ｃ２の曲率半径を極端に小さくすることなく上述した効果を得ることができ、刃片すなわち動刃３１及び静刃３２の幅を小さく収めることができる。 In addition, since the blade edge side regions 31c1 and 32c1 and the blade edge side regions 31c2 and 32c2 are set in both the blade lines 31c and 32c, the radius of curvature of the blade edge side regions 31c2 and 32c2 of each blade line is extremely small. The effect mentioned above can be acquired without doing, and the width | variety of a blade piece, ie, the moving blade 31, and the stationary blade 32, can be stored small.

その上、前記刃元側領域３１ｃ１、３２ｃ１と前記刃先側領域３１ｃ２、３２ｃ２との境界における刃線間の交差角度を約２３°としているので、従来の鋏と比較して、刃先側領域３１ｃ２、３２ｃ２において切断に要する荷重を十分小さくすることができる。 In addition, since the crossing angle between the blade lines at the boundary between the cutting edge region 31c1, 32c1 and the cutting edge region 31c2, 32c2 is about 23 °, the cutting edge region 31c2, The load required for cutting in 32c2 can be made sufficiently small.

そして、前記交差角度の最大値が９０°であるので、刃元側領域３１ｃ１、３２ｃ１においては従来の鋏と同様の使用感を得ることができる。 And since the maximum value of the said crossing angle is 90 degrees, in the blade edge | side area | regions 31c1 and 32c1, the same usability as the conventional scissors can be obtained.

次いで、本発明の第二実施形態を図６〜図１０を参照しつつ以下に示す。なお、前述した第一実施形態におけるものに対応する各部位には、同一の名称及び符号を付している。 Next, a second embodiment of the present invention will be described below with reference to FIGS. In addition, the same name and code | symbol are attached | subjected to each site | part corresponding to the thing in 1st embodiment mentioned above.

本実施形態に係る鋏Ｈ２は、図６及び図７に示すように、第１の刃片たる動刃３１を有する第１の鋏身１１と、前記動刃３１と対をなす第２の刃片たる静刃３２を有する第２の鋏身１２とを、支軸４を中心に回動自在に結合してなる。以下、第一実施形態に係る鋏Ｈとの相違点について述べるが、以下に述べる相違点に係る箇所以外、本実施形態に係る鋏Ｈ２は、前述した第一実施形態に係る鋏Ｈと同様の構成を有する。 As shown in FIGS. 6 and 7, the heel H <b> 2 according to the present embodiment includes a first slimming body 11 having a moving blade 31 that is a first blade piece, and a second blade that makes a pair with the moving blade 31. A second slimming body 12 having a single stationary blade 32 is coupled to be rotatable about a support shaft 4. Hereinafter, the differences from the heel H according to the first embodiment will be described, but the heel H2 according to the present embodiment is the same as the heel H according to the first embodiment described above, except for the portions related to the differences described below. It has a configuration.

本実施形態では、図８及び図９に示すように、前記動刃３１及び前記静刃３２双方の刃線３１ｃ、３２ｃに、切断操作に伴って切断位置が前記軸４から遠ざかるに従って両刃線３１ｃ、３２ｃがなす交差角度が漸次小さくなる曲線状の刃元側領域３１ｃ１、３２ｃ１と、この刃元側領域３１ｃ１、３２ｃ１の刃先３１ｅ、３２ｅ側に隣接し前記交差角度が全域に亘って前記刃元側領域３１ｃ１、３２ｃ１との境界における前記交差角度よりも大きい刃先側領域３１ｃ２、３２ｃ２とを設定している。以下、動刃３１の刃線３１ｃ及び前記静刃３２の刃線３２ｃは全く同一の形状を有するので、動刃３１の刃線３１ｃのみについて説明する。 In this embodiment, as shown in FIG. 8 and FIG. 9, the double-blade line 31 c is applied to the blade lines 31 c and 32 c of both the moving blade 31 and the stationary blade 32 as the cutting position moves away from the shaft 4 along with the cutting operation. , 32c, the cutting edge side areas 31c1, 32c1 having a curved shape and the cutting edge adjacent to the cutting edge 31e, 32e side of the cutting edge side areas 31c1, 32c1, the cutting angle extends over the entire area. The blade edge side regions 31c2 and 32c2 that are larger than the intersecting angle at the boundary with the side regions 31c1 and 32c1 are set. Hereinafter, since the blade line 31c of the moving blade 31 and the blade line 32c of the stationary blade 32 have exactly the same shape, only the blade line 31c of the moving blade 31 will be described.

前記刃元側領域３１ｃ１の曲率半径は、本実施形態では１３７２．５ｍｍである。そして、図８に示すように、この刃元側領域３１ｃ１の刃先３１ｅ側には、前記刃先側領域３１ｃ２が隣接している。 The radius of curvature of the blade base side region 31c1 is 1372.5 mm in this embodiment. As shown in FIG. 8, the blade edge region 31c2 is adjacent to the blade edge 31e side of the blade edge region 31c1.

前記刃先側領域３１ｃ２は、図８に示すように、前記刃元側領域３１ｃ１に近い側から順に、それぞれ曲率半径の異なる複数、より具体的には第１及び第２の小径曲線部分３１ｃｘ、３１ｃｙを含んでいる。これら第１及び第２の小径曲線部分３１ｃｘ、３１ｃｙの曲率半径はいずれも前記刃元側領域３１ｃ１の曲率半径よりも小さい。さらに詳述すると、第１の小径曲線部分３１ｃｘの曲率半径は５０ｍｍであり、第２の小径曲線部分３１ｃｙの曲率半径は１００ｍｍである。なお、以下の説明において、静刃３２の各部には、上述した動刃３１における対応する部位と同一の名称及び先頭の「３１」を「３２」に変更した符号を付している。 As shown in FIG. 8, the cutting edge side region 31c2 has a plurality of different curvature radii in order from the side close to the cutting edge side region 31c1, more specifically, first and second small diameter curve portions 31cx, 31cy. Is included. The curvature radii of the first and second small-diameter curve portions 31cx and 31cy are both smaller than the curvature radius of the cutting edge side region 31c1. More specifically, the curvature radius of the first small-diameter curve portion 31cx is 50 mm, and the curvature radius of the second small-diameter curve portion 31cy is 100 mm. In the following description, each part of the stationary blade 32 is given the same name as the corresponding portion in the above-described moving blade 31 and the reference numeral in which the leading “31” is changed to “32”.

本実施形態において、刃線３１ｃ、３２ｃ間の交差角度は、切断位置が前記軸４から遠ざかるに従って、図１０を参照しつつ以下に述べるように変化する。 In the present embodiment, the crossing angle between the blade lines 31c and 32c changes as described below with reference to FIG. 10 as the cutting position moves away from the axis 4.

両刃線３１ｃ、３２ｃの軸４に近い側の端すなわち刃元３１ｆ、３２ｆ側の端同士が交差している状態では、刃線３１ｃ、３２ｃ間の交差角度は、図１０のグラフの実線ａ２に示すように、９０°である。以下、切断操作に伴って切断位置は刃元側領域３１ｃ１、３２ｃ１内を前記軸４から遠ざかる方向に移動する。両刃線３１ｃ、３２ｃがなす交差角度は、切断位置が前記軸４から遠ざかるに従って漸次小さくなり、刃先側領域３１ｃ２、３２ｃ２との境界で極小値、具体的には約１８°となる。 In a state where the ends of the two blade lines 31c and 32c near the axis 4, that is, the ends on the blade bases 31f and 32f intersect each other, the intersecting angle between the blade lines 31c and 32c is the solid line a2 in the graph of FIG. As shown, it is 90 °. Hereinafter, the cutting position moves in the direction away from the shaft 4 in the blade base region 31c1, 32c1 with the cutting operation. The intersecting angle formed by the two blade lines 31c and 32c gradually decreases as the cutting position moves away from the axis 4, and becomes a minimum value, specifically about 18 °, at the boundary with the blade edge regions 31c2 and 32c2.

それから、切断位置が刃先側領域３１ｃ２、３２ｃ２内に移動すると、切断位置が前記軸４から遠ざかるに従って、前記図１０のグラフの実線ａ２に示すように、両刃線がなす交差角度は前記極小値から漸次大きくなる。特に、切断位置が前記第１の小径曲線部分３１ｃｘ、３２ｃｘに位置する際には、切断位置が前記軸から遠ざかるに従って、両刃線がなす交差角度が急速に大きくなる。すなわち、前記第１の小径曲線部分３１ｃｘ、３２ｃｘは、請求項中の交差角度急変部分である。この第１の小径曲線部分３１ｃｘ、３２ｃｘ（交差角度急変部分）は、本実施形態では、刃線３１ｃ、３２ｃの基端（刃元側の端）から４１．４〜４４．６ｍｍの位置すなわち刃線の全長の約５９％〜約６４％の位置に設定している。より具体的には、刃元側領域３１ｃ１、３２ｃ１と刃先側領域３１ｃ２、３２ｃ２との境界すなわち刃元側領域３１ｃ１、３２ｃ１と第１の小径曲線部分３１ｃｘ、３２ｃｘとの境界では前記交差角度が約１８°であるのに対し、第１の小径曲線部分３１ｃｘ、３２ｃｘと第２の小径曲線部分３１ｃｙ、３２ｃｙとの境界では前記交差角度が約２５°である。それから、切断位置が前記第２の小径曲線部分３１ｃｙ、３２ｃｙに達した際も、両刃線３１ｃ、３２ｃがなす交差角度は、切断位置が前記軸４から遠ざかるに従って漸次大きくなる。 Then, when the cutting position moves into the cutting edge side regions 31c2 and 32c2, as the cutting position moves away from the shaft 4, as shown by the solid line a2 in the graph of FIG. Gradually increases. In particular, when the cutting position is located in the first small-diameter curve portions 31cx and 32cx, the crossing angle formed by the two blade lines rapidly increases as the cutting position moves away from the axis. That is, the first small-diameter curve portions 31cx and 32cx are intersection angle sudden change portions in the claims. In the present embodiment, the first small-diameter curve portions 31cx and 32cx (intersection angle sudden change portions) are positions 41.4 to 44.6 mm from the base ends (ends on the blade base side) of the blade lines 31c and 32c, that is, the blades. The position is set at about 59% to about 64% of the total length of the line. More specifically, at the boundary between the blade base region 31c1, 32c1 and the blade tip region 31c2, 32c2, that is, the boundary between the blade base region 31c1, 32c1 and the first small-diameter curve portion 31cx, 32cx, the intersection angle is about Whereas the angle is 18 °, the crossing angle is about 25 ° at the boundary between the first small-diameter curve portions 31cx and 32cx and the second small-diameter curve portions 31cy and 32cy. Then, even when the cutting position reaches the second small-diameter curve portions 31 cy and 32 cy, the crossing angle formed by the two blade lines 31 c and 32 c gradually increases as the cutting position moves away from the shaft 4.

以上に述べたように、本実施形態によっても、刃元側領域３１ｃ１、３２ｃ１においては交差角度を従来の鋏と同様に大きなものとしつつ、刃先側領域３１ｃ２、３２ｃ２においては切断位置が前記軸４から遠ざかるに従って前記交差角度は大きくなる。換言すれば、前記交差角度は刃先側領域３１ｃ２、３２ｃ２の全域に亘って前記刃元側領域３１ｃ１、３２ｃ１との境界における前記交差角度よりも大きくなる。従って、刃先側領域３１ｃ２、３２ｃ２において切断に要する荷重を切断位置にかかわらず略一定となるようにし、刃先３１ｅ、３２ｅ近傍の領域をも段ボールやプラスチック製シート、或いはプラスチック製の梱包バンド等を切断する目的に使用できる。 As described above, according to the present embodiment, the cutting angle is set to be larger in the cutting edge side regions 31c2 and 32c2 while the crossing angle is made larger in the cutting edge side regions 31c1 and 32c1 as in the conventional scissors. The crossing angle increases as the distance from the distance increases. In other words, the intersecting angle is larger than the intersecting angle at the boundary with the cutting edge side regions 31c1 and 32c1 over the entire region of the cutting edge side regions 31c2 and 32c2. Accordingly, the load required for cutting in the cutting edge side regions 31c2 and 32c2 is made substantially constant regardless of the cutting position, and the region in the vicinity of the cutting edges 31e and 32e is also cut with corrugated cardboard, plastic sheets, or plastic packing bands. Can be used for

また、前記第１の小径曲線部分３１ｃｘ、３２ｃｘの曲率半径を前記第２の小径曲線部分３１ｃｙ、３２ｃｙよりも小さくしているので、切断操作に伴い切断位置が前記軸４から遠ざかるに従って刃先３１ｅ、３２ｅ近傍の領域すなわち前記第２の小径曲線部分３１ｃｙ、３２ｃｙで両刃線がなす交差角度を急激に変化させることなく、刃先３１ｅ、３２ｅ近傍の領域をも段ボールやプラスチック製シート、或いはプラスチック製の梱包バンド等を切断する目的に使用できる構成を好適に実現できる。 Further, since the radius of curvature of the first small-diameter curve portions 31cx and 32cx is smaller than that of the second small-diameter curve portions 31cy and 32cy, the cutting edge 31e, as the cutting position moves away from the shaft 4 with the cutting operation. A region near 32e, that is, a region near the blade edges 31e, 32e is also made of corrugated cardboard, plastic sheet, or plastic packaging without abruptly changing the crossing angle formed by the two blade lines in the second small-diameter curve portions 31cy, 32cy. A configuration that can be used for the purpose of cutting a band or the like can be suitably realized.

さらに、双方の刃線３１ｃ、３２ｃに前記刃元側領域３１ｃ１、３２ｃ１及び刃先側領域３１ｃ２、３２ｃ２を設定しているので、各刃線の刃先側領域３１ｃ２、３２ｃ２の曲率半径を極端に小さくすることなく上述した効果を得ることができ、刃片すなわち動刃３１及び静刃３２の幅を小さく収めることができる。 Further, since the blade edge side regions 31c1 and 32c1 and the blade edge side regions 31c2 and 32c2 are set in both the blade lines 31c and 32c, the radius of curvature of the blade edge side regions 31c2 and 32c2 of each blade line is extremely reduced. The above-described effects can be obtained without any problem, and the widths of the blade pieces, that is, the moving blade 31 and the stationary blade 32 can be reduced.

加えて、前記刃元側領域３１ｃ１、３２ｃ１と前記刃先側領域３１ｃ２、３２ｃ２との境界における刃線間の交差角度を約１８°としているので、従来の鋏と比較して、刃先側領域３１ｃ２、３２ｃ２において切断に要する荷重を十分小さくすることができる。 In addition, since the crossing angle between the blade lines at the boundary between the blade base region 31c1, 32c1 and the blade tip region 31c2, 32c2 is about 18 °, the blade tip region 31c2, The load required for cutting in 32c2 can be made sufficiently small.

なお、本発明は上述した実施形態に限らない。 The present invention is not limited to the embodiment described above.

例えば、上述した第一実施形態では、前記刃先側領域を、それぞれ曲率半径の異なる第１〜第５の小径曲線部分を含むものとし、また、第二実施形態では、前記刃先側領域を、それぞれ曲率半径の異なる第１及び第２の小径曲線部分を含むものとしているが、小径曲線部分の数及び配列は任意に設定してよく、また、各小径曲線部分の曲率半径も、刃元側領域の曲率半径よりも小さいものであれば任意に設定してよい。加えて、刃線の形状を、二次曲線や三次曲線等、円弧状以外の形状を有する曲線や、このような曲線を繋ぎ合わせたものに設定してももちろんよく、円弧と円弧以外の形状を有する曲線とを繋ぎ合わせたものに設定してももちろんよい。換言すれば、前記刃先側領域の各部の曲率半径が連続的に変化する形状に設定してももちろんよい。但し、刃元側領域に最も近い小径曲線部分の曲率半径が他の小径曲線部分の曲率半径よりも小さい、換言すれば刃元側領域に最も近い小径曲線部分を交差角度急変部分としているもの、又は前記刃先側領域が前記小径曲線部分を３つ以上含むものであって、刃元側領域に近い側から数えて第２番目の小径曲線部分の曲率半径が他の小径曲線部分の曲率半径よりも小さい、換言すれば刃元側領域に近い側から数えて第２番目の小径曲線部分を交差角度急変部分としているものであれば、切断操作に伴って切断位置が刃先近傍の領域で前記軸から遠ざかるに従って両刃線がなす交差角度を急激に変化させることなく刃先近傍においても段ボールやプラスチック製シート、或いはプラスチック製の梱包バンド等を切断する使用態様に対応できるようにすることができるため、より望ましい。加えて、上述した第一及び第二実施形態では、いずれも刃線の全長の約５９％〜約６４％の位置に交差角度急変部分を設けているが、刃線の全長の５５％〜７０％の位置に交差角度急変部分を設けているものであれば、この交差角度急変部分より先端側においても前記交差角度を十分大きくすることができるという効果は得られる。特に、交差角度急変部分を刃先寄りに設ければ、刃先近傍における前記交差角度をより大きく保つことができる。 For example, in the first embodiment described above, the cutting edge side region includes first to fifth small-diameter curved portions having different curvature radii, and in the second embodiment, the cutting edge side region is respectively curved. The first and second small-diameter curve portions having different radii are included, but the number and arrangement of the small-diameter curve portions may be arbitrarily set, and the radius of curvature of each small-diameter curve portion is also set in the cutting edge region. Any value smaller than the radius of curvature may be set. In addition, the shape of the blade line may be set to a curve having a shape other than an arc shape, such as a quadratic curve or a cubic curve, or a combination of such curves. Of course, it may be set to be connected to a curve having In other words, of course, the radius of curvature of each part of the cutting edge side region may be set to a shape that continuously changes. However, the radius of curvature of the small-diameter curve portion closest to the blade base region is smaller than the curvature radius of the other small-diameter curve portion, in other words, the small-diameter curve portion closest to the blade base region is the intersection angle sudden change portion, Alternatively, the blade edge region includes three or more small-diameter curve portions, and the radius of curvature of the second small-diameter curve portion counting from the side close to the blade base region is larger than the curvature radius of the other small-diameter curve portions. Is smaller, in other words, the second small-diameter curve portion counted from the side close to the blade base region is a portion where the crossing angle suddenly changes, the cutting position in the region near the blade edge accompanying the cutting operation It is possible to cope with the usage mode of cutting corrugated cardboard, plastic sheet, plastic packing band, etc. even in the vicinity of the blade edge without abruptly changing the crossing angle made by the two blade lines as it moves away from It is possible to more desirable. In addition, in the first and second embodiments described above, the crossing angle sudden change portion is provided at a position of about 59% to about 64% of the entire length of the blade line, but 55% to 70% of the total length of the blade line. If the crossing angle sudden change portion is provided at the position of%, the effect that the crossing angle can be sufficiently increased also on the tip side from this crossing angle sudden change portion is obtained. In particular, if the intersection angle sudden change portion is provided closer to the blade edge, the intersection angle in the vicinity of the blade edge can be kept larger.

また、上述した第一及び第二実施形態では、双方の刃線に前記刃元側領域及び刃先側領域を設定しているが、一方の刃線のみに前記刃元側領域及び刃先側領域を設定してももちろんよい。 Moreover, in the first and second embodiments described above, the blade base side region and the blade tip side region are set for both blade lines, but the blade base side region and the blade tip side region are set only for one blade line. Of course, you can set it.

加えて、上述した第一実施形態では前記刃元側領域と前記刃先側領域との境界における刃線間の交差角度を約２３°、第二実施形態では前記刃元側領域と前記刃先側領域との境界における刃線間の交差角度を約１８°にそれぞれ設定しているが、前記刃元側領域と前記刃先側領域との境界における刃線間の交差角度は２０°以上であれば、上述した実施形態に係るものと同様の効果を得ることができる。 In addition, in the first embodiment described above, the crossing angle between the blade lines at the boundary between the cutting edge side region and the cutting edge side region is about 23 °, and in the second embodiment, the cutting edge side region and the cutting edge side region. The crossing angle between the blade lines at the boundary is set to about 18 °, respectively, but if the crossing angle between the blade lines at the boundary between the cutting edge side region and the cutting edge side region is 20 ° or more, The same effects as those according to the above-described embodiment can be obtained.

そして、上述した第一及び第二実施形態において、刃線間の交差角度の最大値がいずれも９０°であるが、刃線間の交差角度の最大値が９０°を上回るものであっても上述した第一及び第二実施形態に係るものと同様の効果を得ることができる。一方、刃線間の交差角度の最大値が９０°を下回るものであっても、刃元側領域においては切断操作に伴って切断位置が前記軸から遠ざかるに従って両刃線がなす交差角度が漸次小さくなり、刃元側領域と刃先側領域との境界で両刃線がなす交差角度が最小となるものであれば、刃元側領域においては前記交差角度を従来の鋏と同様に大きなものとし、刃先側においても前記交差角度をある程度大きく保ち刃先側領域において切断に要する荷重が切断位置にかかわらず略一定となるようにすることはできる。 In the first and second embodiments described above, the maximum value of the crossing angle between the blade lines is 90 °, but the maximum value of the crossing angle between the blade lines is more than 90 °. The same effects as those according to the first and second embodiments described above can be obtained. On the other hand, even if the maximum value of the crossing angle between the blade lines is less than 90 °, the crossing angle formed by the two blade lines gradually decreases as the cutting position moves away from the axis in the cutting edge side region along with the cutting operation. If the crossing angle formed by the two blade lines at the boundary between the cutting edge side region and the cutting edge side region is minimized, the crossing angle in the cutting edge side region is set to be as large as that of the conventional scissors. Even on the side, the crossing angle can be kept large to some extent so that the load required for cutting in the cutting edge side region is substantially constant regardless of the cutting position.

加えて、上述した第一及び第二実施形態では刃裏面を平坦なものとしているが、粘着剤を塗布した紙葉類等のシートを切断する際に刃線近傍に粘着剤が付着する不具合の発生を防ぐべく刃裏面に凹陥部や段部を設けるようにしてもよい。このような鋏の例として、以下に述べるようなものが挙げられる。なお、以下の説明において、前述した第一及び第二実施形態におけるものに対応する各部位には、同一の名称及び符号を付している。 In addition, in the first and second embodiments described above, the back surface of the blade is flat, but when the sheet such as paper sheets coated with the adhesive is cut, the adhesive adheres to the vicinity of the blade line. You may make it provide a recessed part and a step part in a blade back surface in order to prevent generation | occurrence | production. Examples of such wrinkles include the following. In the following description, parts corresponding to those in the first and second embodiments described above are assigned the same name and reference numeral.

例えば、動刃３１を図１１の（ａ）に示すように、刃裏面３１ａに、刃線３１ｃに沿って延びる１本の有底溝状の凹陥部３１ｘを設けてもよく、同図の（ｂ）に示すように、刃裏面３１ａの略全域に凹陥部３１ｙを設けてもよい。さらに、同図の（ｃ）に示すように、凹陥部３１ｚが刃峰３１ｄ側及び刃先３１ｅ側に開口する、換言すれば刃線３１ｃ近傍の部位が他の部位よりも静刃３２に接近した形状のものであってもよく、同図の（ｄ）に示すように、複数本の溝状の凹陥部３１ｘを設けてもよい。また、図１２及び図１３に示すように、動刃３１の刃線３１ｃ近傍の部位に動刃３１を貫通する貫通孔３１ｈを設けてももちろんよい。さらに、図１４及び図１５に示すように、動刃３１の刃裏面３１ａに平面視円形をなす多数の凹陥部３１ｋを設けてももちろんよい。なお、図１１〜図１５には動刃３１のみを示しているが、静刃３２にも同様に凹陥部や貫通孔を設けてもよいのはもちろんである。また、図１１に示す態様において、刃裏面３１ａの刃線３１ｃ近傍の部位と凹陥部３１ｘ、３１ｙの底面とは平行であってもよく、また、動刃３１及び静刃３２を幅方向中央部に向かって漸次他方の刃身から厚さ方向に離間する形状とすることにより幅方向中央部を凹陥部として形成してもよい。 For example, as shown in FIG. 11A, the moving blade 31 may be provided with a bottomed groove-shaped recess 31x extending along the blade line 31c on the blade back surface 31a. As shown to b), you may provide the recessed part 31y in the substantially whole region of the blade back surface 31a. Furthermore, as shown in (c) of the same figure, the recessed part 31z opens to the blade peak 31d side and the blade edge 31e side, in other words, the part near the blade line 31c is closer to the stationary blade 32 than the other parts. The shape may be sufficient, and as shown to (d) of the figure, you may provide the several groove-shaped recessed part 31x. Moreover, as shown in FIG.12 and FIG.13, of course, you may provide the through-hole 31h which penetrates the moving blade 31 in the site | part vicinity of the blade line 31c of the moving blade 31. FIG. Furthermore, as shown in FIGS. 14 and 15, it is of course possible to provide a large number of recessed portions 31 k having a circular shape in plan view on the blade back surface 31 a of the moving blade 31. Although only the moving blade 31 is shown in FIGS. 11 to 15, it goes without saying that the stationary blade 32 may be similarly provided with a recessed portion or a through hole. Moreover, in the aspect shown in FIG. 11, the site | part of the blade back surface 31a vicinity of the blade line 31c and the bottom face of the recessed parts 31x and 31y may be parallel, and the moving blade 31 and the stationary blade 32 are made into the center part of the width direction. Alternatively, the central portion in the width direction may be formed as a recessed portion by gradually moving away from the other blade in the thickness direction.

さらに、本発明に係る他の鋏として、以下に述べるようなものが挙げられる。なお、以下の説明においても、前述した第一及び第二実施形態におけるものに対応する各部位には、同一の名称及び符号を付している。 Further, other examples of the present invention include those described below. In the following description, the same names and symbols are assigned to the portions corresponding to those in the first and second embodiments described above.

例えば、図１６の（ａ）に示すように、刃線３１ｃの刃先側領域３１ｃ２の一部を鋸歯状に形成してもよく、同図の（ｂ）に示すように、刃線３１ｃの刃元側領域３１ｃ１の一部を鋸歯状に形成してもよい。もちろん、静刃３２の刃線３２ｃも同様に構成してもよく、刃元側領域３１ｃ１、３２ｃ１と刃先側領域３１ｃ２、３２ｃ２との双方に鋸歯状に形成した部位を設ける態様や、刃線３１ｃ、３２ｃの全体を鋸歯状に形成する態様を採用してもよい。なお、本発明では、このように刃線３１ｃの一部を鋸歯状に形成した鋏において、刃線３１ｃが鋸歯状をなす部位の「両刃線がなす交差角度」は、鋸歯の山同士を滑らかに結んだ線分同士がなす角度である。 For example, as shown in FIG. 16 (a), a part of the cutting edge side region 31c2 of the blade line 31c may be formed in a sawtooth shape, and as shown in FIG. 16 (b), the blade of the blade line 31c. A part of the original region 31c1 may be formed in a sawtooth shape. Needless to say, the blade line 32c of the stationary blade 32 may be configured in the same manner, in which a portion formed in a sawtooth shape is provided in both the blade base region 31c1, 32c1 and the blade tip region 31c2, 32c2, or the blade wire 31c. , 32c may be formed in a sawtooth shape. In the present invention, in the case where a part of the blade line 31c is formed in a sawtooth shape in this way, the “intersection angle formed by the two blade lines” of the portion where the blade line 31c forms a sawtooth shape is a smoothness between the sawtooth peaks. This is the angle formed by the line segments connected to each other.

加えて、図１７に示すように、刃裏面３２ａと刃表面３２ｂとの間の前記刃線３２ｃにおける刃角度を第一の所定角度θ１、例えば５０°とした上で、刃表面３２ｂ側に、刃裏面３２ａとなす角度が前記第一の所定角度θ１よりも小さな第二の所定角度θ２となる領域を設けてもよい。 In addition, as shown in FIG. 17, the blade angle at the blade line 32c between the blade back surface 32a and the blade surface 32b is set to a first predetermined angle θ1, for example, 50 °, and then the blade surface 32b side. You may provide the area | region where the angle which it makes with the blade back surface 32a becomes 2nd predetermined angle (theta) 2 smaller than said 1st predetermined angle (theta) 1.

また、図１８に示すように、動刃３１及び静刃３２の刃線３１ｃ、３２ｃ近傍は互いに対向するとともに、動刃３１及び静刃３２が、それぞれ刃峰３１ｄ、３２ｄ側に向かうにつれ他方の刃から厚さ方向に離間する形状を採用してもよい。 Further, as shown in FIG. 18, the vicinity of the blade lines 31c and 32c of the moving blade 31 and the stationary blade 32 oppose each other, and the moving blade 31 and the stationary blade 32 move toward the blade peaks 31d and 32d, respectively. You may employ | adopt the shape spaced apart in a thickness direction from a blade.

加えて、図１９に示すように、第１及び第２の柄部２１、２２を、以下に示すように構成してもよい。すなわち、支軸４から動刃３１又は静刃３２と反対側に延び内面の一部が指掛け部である柄本体２１１、２２１と、この柄本体２１１、２２１に収納された収納状態及び前記柄本体２１１、２２１から突出し前記指掛け部とともに指掛け環を形成する使用状態をとり得る紐状の指掛け部材２１２、２２２と、この指掛け部材２１２、２２２の自由端に接続され前記指掛け部材２１２、２２２を柄本体２１１、２２１内に収納させる収納位置と前記指掛け部材２１２、２２２を柄本体２１１、２２１から突出させる使用位置との間で移動可能な操作部材２１３、２２３とを具備する構成を採用してもよい。 In addition, as shown in FIG. 19, the first and second handle portions 21 and 22 may be configured as follows. That is, the handle main bodies 211 and 221 that extend from the support shaft 4 to the opposite side of the moving blade 31 or the stationary blade 32, and a part of the inner surface is a finger-hanging portion, the storage state stored in the handle main bodies 211 and 221 and the handle main body A string-like finger-hanging member 212, 222 that protrudes from 211, 221 and can form a finger-ring ring together with the finger-hanging portion, and is connected to the free ends of the finger-hanging members 212, 222, and the finger-hanging members 212, 222 are A configuration may be adopted that includes operation members 213 and 223 that are movable between a storage position in which 211 and 221 are stored and a use position in which the finger-hanging members 212 and 222 are protruded from the handle bodies 211 and 221. .

そして、図２０に示すように、第１及び第２の柄部２１、２２がそれぞれ角柱を半分に割った形状をなしているとともに、動刃３１及び静刃３２を重ね合わせた状態でこれら動刃３１及び静刃３２を鞘５に収納可能であり、さらに第１の柄部２１にストラップ２１０を設けている態様のものを採用してもよい。また、この鋏には、動刃３１及び静刃３２を鞘から取り出した状態で刃線同士が互いに離間する方向に動刃３１及び静刃３２を付勢すべく、動刃３１及び静刃３２に付勢手段たるねじりコイルばね６を接続する構成を採用している。 As shown in FIG. 20, each of the first and second handle portions 21 and 22 has a shape in which the prism is divided in half, and the moving blade 31 and the stationary blade 32 are overlapped with each other. The blade 31 and the stationary blade 32 can be housed in the sheath 5, and the first handle portion 21 may be provided with the strap 210. In addition, the moving blade 31 and the stationary blade 32 are urged on the rod in order to bias the moving blade 31 and the stationary blade 32 in a direction in which the blade lines are separated from each other in a state where the moving blade 31 and the stationary blade 32 are removed from the sheath. A configuration is adopted in which a torsion coil spring 6 as urging means is connected.

加えて、上述した第一及び第二実施形態では、柄部のうち指掛け環近傍の部位を他の部位と比較して軟質な樹脂により形成しており、柄部全体を二色成形により形成しているが、図２１に示すように、柄部２１、２２全体を単一の材料により形成してもよい。 In addition, in the first and second embodiments described above, the portion near the finger ring in the handle is formed of a soft resin compared to other portions, and the entire handle is formed by two-color molding. However, as shown in FIG. 21, the entire handle portions 21 and 22 may be formed of a single material.

その他、本発明の趣旨を損ねない範囲で種々に変更してよい。 In addition, you may change variously in the range which does not impair the meaning of this invention.

Ｈ…鋏
１１、１２…（第１、第２の）鋏身
２１、２２…（第１、第２の）柄部
２１ａ、２２ａ…指掛け部
３１…刃片（動刃）
３２…刃片（静刃）
３１ｃ、３２ｃ…刃線
３１ｃ１、３２ｃ１…刃元側領域
３１ｃ２、３２ｃ２…刃先側領域 H ... 鋏 11, 12 ... (first, second) slimming 21, 22 ... (first, second) handle 21a, 22a ... finger hook 31 ... blade (moving blade)
32 ... Blade (Static blade)
31c, 32c ... Blade line 31c1, 32c1 ... Blade side region 31c2, 32c2 ... Blade side region

以上の課題を解決すべく、本発明に係る鋏は、以下に述べるような構成を有する。すなわち本発明に係る鋏は、柄部、及び刃線を有する刃片をそれぞれ備えた対をなす鋏身と、これら対をなす鋏身を回動自在に結合する軸とを有する鋏であって、少なくとも一方の刃線に、切断操作に伴って切断位置が前記軸から遠ざかるに従って両刃線がなす交差角度が漸次小さくなる曲線状の刃元側領域と、この刃元側領域の刃先側に隣接するとともに当該刃線の刃先側の端に達し前記交差角度が略変化しないか又は切断位置が前記軸から遠ざかるに従って前記交差角度が大きくなる刃先側領域とが設定されている。 In order to solve the above problems, the bag according to the present invention has a configuration as described below. That is, the scissors according to the present invention are scissors having a pair of slimmings each having a handle portion and a blade piece having a blade line, and a shaft that rotatably couples the pairing slimmings. The at least one blade line is adjacent to the cutting edge side of the cutting edge side area of the curved edge side area where the intersecting angle formed by the two blade lines gradually decreases as the cutting position moves away from the axis with the cutting operation. In addition, a cutting edge side region is set in which the crossing angle does not substantially change when reaching the edge of the blade line and the crossing angle increases as the cutting position moves away from the axis.

Claims

柄部、及び刃線を有する刃片をそれぞれ備えた対をなす鋏身と、これら対をなす鋏身を回動自在に結合する軸とを有する鋏であって、
切断操作に伴って切断位置が前記軸から遠ざかるに従って両刃線がなす交差角度が漸次小さくなる曲線状の刃元側領域と、この刃元側領域の刃先側に隣接し前記交差角度が略変化しないか又は切断位置が前記軸から遠ざかるに従って前記交差角度が大きくなる刃先側領域とが設定されていることを特徴とする鋏。 A ridge having a pair of slimming pieces each having a handle portion and a blade piece having a blade line, and a shaft that rotatably couples the paired slimmings,
As the cutting position moves away from the axis with the cutting operation, the intersecting angle formed by the two blade lines gradually decreases, and the intersecting angle does not change substantially adjacent to the cutting edge side of the cutting edge region. Or a cutting edge side region in which the crossing angle increases as the cutting position moves away from the axis.

前記刃先側領域が、前記刃元側領域との境界付近に切断位置が前記軸から遠ざかるに従って前記交差角度が急激に大きくなる交差角度急変部分を有する請求項１記載の鋏。 2. The scissors according to claim 1, wherein the cutting edge side region has a crossing angle sudden change portion where the crossing angle rapidly increases as the cutting position moves away from the axis in the vicinity of the boundary with the cutting edge side region.

前記柄部が使用者の指を所定の指掛け領域内に掛けておくための指掛け部を有し、少なくとも一方の刃線に前記刃元側領域と前記刃先側領域とが設定されており、前記刃先側領域が、前記交差角度が全域に亘って前記刃元側領域との境界における前記交差角度よりも大きくなるものである請求項１又は２記載の鋏。 The handle portion has a finger hook portion for hanging a user's finger in a predetermined finger hook region, and the blade base region and the blade tip region are set on at least one blade line, The scissors according to claim 1 or 2, wherein the cutting edge side region has the crossing angle larger than the crossing angle at the boundary with the cutting edge side region over the entire region.

前記刃先側領域が、それぞれ曲率半径の異なる複数の小径曲線部分を含む請求項１、２又は３記載の鋏。 The scissors according to claim 1, 2 or 3, wherein the cutting edge side region includes a plurality of small-diameter curved portions each having a different curvature radius.

前記複数の小径曲線部分のうち、刃元側領域に最も近い小径曲線部分の曲率半径が他の小径曲線部分の曲率半径よりも小さく、この小径曲線部分が、切断位置が前記軸から遠ざかるに従って前記交差角度が急激に大きくなる交差角度急変部分である請求項４記載の鋏。 Among the plurality of small-diameter curve portions, the radius of curvature of the small-diameter curve portion closest to the cutting edge side region is smaller than the curvature radius of the other small-diameter curve portions, and the small-diameter curve portion is further reduced as the cutting position moves away from the axis. The bag according to claim 4, wherein the crossing angle is a sudden change portion where the crossing angle suddenly increases.

前記刃先側領域が前記小径曲線部分を３つ以上含むものであって、刃元側領域に近い側から数えて第２番目の小径曲線部分の曲率半径が他の小径曲線部分の曲率半径よりも小さく、この小径曲線部分が、切断位置が前記軸から遠ざかるに従って前記交差角度が急激に大きくなる交差角度急変部分である請求項４記載の鋏。 The cutting edge side region includes three or more of the small diameter curved portions, and the radius of curvature of the second small diameter curved portion counted from the side close to the cutting edge side region is larger than the curvature radius of the other small diameter curved portions. 5. The scissors according to claim 4, wherein the small-diameter curve portion is a portion where the crossing angle suddenly changes as the cutting position moves away from the axis.

双方の刃線に、前記刃元側領域及び刃先側領域が設定されている請求項１、２、３、４、５又は６記載の鋏。 The scissors according to claim 1, 2, 3, 4, 5 or 6, wherein the blade base side region and the blade tip side region are set in both the blade lines.

前記交差角度の最大値が９０°以上である請求項１、２、３、４、５、６又は７記載の鋏。 The bag according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the maximum value of the crossing angle is 90 ° or more.

前記刃元側領域と前記刃先側領域との境界における前記交差角度が１８°以上である請求項１、２、３、４、５、６、７又は８記載の鋏。 The scissors according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the crossing angle at a boundary between the blade base side region and the blade tip side region is 18 ° or more.

前記小径曲線部分の一つの曲率半径が、該小径曲線部分を含む刃線の全長よりも小さい請求項４記載の鋏。 The scissors according to claim 4, wherein one curvature radius of the small-diameter curve portion is smaller than a total length of the blade line including the small-diameter curve portion.