WO1999006189A1 - Ciseaux - Google Patents

Ciseaux Download PDF

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Publication number
WO1999006189A1
WO1999006189A1 PCT/JP1997/002680 JP9702680W WO9906189A1 WO 1999006189 A1 WO1999006189 A1 WO 1999006189A1 JP 9702680 W JP9702680 W JP 9702680W WO 9906189 A1 WO9906189 A1 WO 9906189A1
Authority
WO
WIPO (PCT)
Prior art keywords
scissors
blade
blades
cutting edges
cutting
Prior art date
Application number
PCT/JP1997/002680
Other languages
English (en)
Japanese (ja)
Inventor
Yasuo Hiramatsu
Original Assignee
Sangi Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sangi Co., Ltd. filed Critical Sangi Co., Ltd.
Priority to AU37081/97A priority Critical patent/AU3708197A/en
Priority to PCT/JP1997/002680 priority patent/WO1999006189A1/fr
Publication of WO1999006189A1 publication Critical patent/WO1999006189A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B13/00—Hand shears; Scissors
    • B26B13/06—Hand shears; Scissors characterised by the shape of the blades

Definitions

  • the present invention relates to scissors for cutting an object to be cut by crossing contact between a pair of blade portions, and for example, relates to scissors that are optimal as hairdressing scissors requiring sharp opening and closing operations.
  • FIGS. 8 to 11 show conventional general scissors.
  • the pair of scissors pieces 51 and 52 of the scissors are composed of blade portions 53 and 54 and handle portions 55 and 56, respectively.
  • 52 is rotatably connected by a support shaft 57.
  • Each of the blade portions 53, 54 is formed in a curved shape so as to be concave with respect to the counterpart blade portions 54, 53 from the blade edge to the blade edge.
  • the conventional scissors are cut due to the continuous point contact of the cutting edges 58, 59 due to the curved shapes of the blade portions 53, 54.
  • the contact between the blade edges 58 and 59 generated a resistance load, and the cutting work could not always be performed lightly.
  • the contact resistance load on the cutting edges 58, 59 due to the bending of the cutting portions 53, 54 was a problem that cannot be ignored.
  • the cutting edges 5 8 and 5 9 are piled into contact with each other in bending, it also shortens the life of the sharpness. The blade was easily spilled.
  • the processing technology for forming each of the blade portions 53, 54 into a curved shape is a method of forming a curve by a press machine, and a method of forming a curve by hitting with a craftsman's hand.
  • the former is widely used for general purposes such as stationery scissors, and the latter is used for specialized purposes such as hairdressing scissors.
  • those with thin and thin blade tips, such as hairdressing scissors require fine bend adjustment by craftsmen.
  • bending by a craftsman depends on the skill and skill of each craftsman, the degree of the bending curve tends to vary. For this reason, high-quality hairdressing scissors had to be extremely expensive and expensive.
  • the sharpening process by craftsmen who require complicated and dangerous processes there is a tendency for skilled craftsmen to decrease, and now there is a need for machining that can be performed easily and safely.
  • the present invention provides a smooth and sharp cutting function with almost no resistance load due to the contact of the cutting edge of the blade, and is capable of high quality and mass production.
  • the purpose is to provide scissors. Disclosure of the invention
  • a cutting edge of each of the blade portions of each of the both scissor pieces is in contact with each other. It is characterized by being formed substantially linearly when viewed from the thickness side. In this configuration, since the cutting edge of the cutting portion is formed in a substantially straight line, the cutting edge does not contact against the bending of the cutting portion unlike the conventional case. There is almost no resistance load due to contact, and extremely smooth cutting work can be performed.
  • the present invention also provides a pair of scissors, each of which is rotatably supported by a pair of scissors including a blade and a handle, wherein at least each blade of both the scissors is formed by injection molding of metal powder.
  • the cutting edges of the respective blade portions that are in contact with each other are formed substantially linearly when viewed from the thickness side of the blade portions.
  • by forming at least the blade portion by injection molding of metal powder it is possible to use an extremely hard material as the blade portion, and it is possible to greatly improve the molding accuracy of the blade portion. Become. Thereby, a blade portion having a substantially straight cutting edge can be formed with higher precision.
  • hairdressing scissors it is possible to use a hard material that is difficult to use in bending by a conventional craftsman, thereby eliminating the need for bending the blade portion.
  • FIG. 1 is an exploded perspective view of the hairdressing scissors according to the embodiment of the present invention.
  • FIG. 2 shows the closed state of the scissors, (a) is a front view, and (b) is a side view.
  • FIG. 3 shows the open state of the scissors, (a) is a front view, and (b) is a side view.
  • FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.
  • FIG. 5 shows the positional relationship of the blade portions of the scissors, and (a), (b), and (c) are enlarged cross-sectional views of BB, CC, and DD in FIG. 3, respectively.
  • FIG. 6 is an EE enlarged sectional view of FIG. 2 showing the vicinity of the support shaft of the scissors.
  • FIG. 7 is a process diagram illustrating metal powder injection molding of the blade portion of the scissors.
  • Fig. 8 shows a closed state of the scissors in the conventional example, (a) is a front view, and (b) is a side view.
  • Fig. 9 shows the open state of the scissors, (a) is a front view, and (b) is a side view.
  • FIG. 10 is an FF enlarged cross-sectional view of FIG. 8 showing the positional relationship of the blade portion of the scissors.
  • FIG. 11 shows the positional relationship between the blade portions of the scissors, and (a), (b), and (c) are GG, HH, and I-I enlarged cross-sectional views of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • a hairdressing scissor as an embodiment of the present invention will be described with reference to FIGS.
  • a pair of scissors pieces 1 and 2 are respectively composed of blades 3 and 4 and handles 5 and 6, and blades 3 and 4 and handles 5 and 6 are fixed. They are caulked by pins 7 and 8 and are integrally connected.
  • Reference numeral 9 denotes a finger hook
  • reference numeral 10 denotes an adjusting screw for adjusting a closing position of the scissors.
  • the two scissors pieces 1 and 2 are rotatably connected by a support shaft 13 inserted through the shaft insertion holes 11 and 12.
  • the screw portion 13a of the support shaft 13 has an oval shape with both sides cut off, and the adjusting nut 15 is screwed into the screw portion 13a.
  • 14 is to prevent backlash Resin washer.
  • Reference numeral 16 denotes a panel panel, the long hole 16a of which is inserted into the screw portion 13a of the support shaft 13, and the bent portion 16b at the other end of which is provided with an engaging recess 1 provided in the handle 5. 7 is engaged.
  • a plurality of projections 16c are provided radially around the long hole 16a of the panel panel 16 and a number of grooves on the back surface of the adjustment nut 15 are engaged (see FIG. 6). Click stop is possible at every minute rotation of the adjusting nut 15.
  • Each of the blades 3 and 4 has a cutting edge 21 and 22 formed on one side edge thereof, and the edge of the blade is a contact point 23 and 24 (see FIG. 6). It has become.
  • concave back surface portions 25 and 26 are formed on the back surfaces of the blade portions 3 and 4, respectively.
  • the cutting edges 21 and 22 of the blade portions 3 and 4 are viewed from the thickness side of the blade portions 3 and 4, respectively. It is formed almost linearly from the contact points 23 and 24) to the cutting edge. That is, in the closed state of the scissors shown in FIG. 2, the cutting edges 21 and 22 are on the tangent plane S as shown in FIG. 4, and in the open state when the scissors shown in FIG. As shown in Fig. 5, the cutting edges 21 and 22 are set on the plane S in any part.
  • the resistance when opening and closing the scissors can be finely adjusted by the adjustment nut 15 according to the user's preference.
  • the cutting action cannot be exerted if the cutting edges 21 and 22 are warped outward, so that the cutting edges 21 and 22 are assumed to be substantially straight as close as possible to a straight line under the condition that they do not warp outward. That is. Therefore, the case where the cutting edges 21 and 22 are slightly bent inward is included, but the bending amount is much smaller than before.
  • the blade portions 3 and 4 of the scissors are formed by so-called Ml M (Metal Injection Molding).
  • MIM Metal Injection Molding
  • the MIM is obtained by kneading a metal powder and a binder resin, which are the materials of the blade portions 3 and 4, and then kneading the compound (compound) by injection molding to form the blade portions 3 and 4.
  • Most of the resin component is removed from the molded body (green body) by heating or other means, and the degreased body (brown body) is sintered to sinter the blades 3 and 4. It is to get the body (Shinyu one). After that, necessary heat treatment and polishing are performed as the blade portions 3 and 4.
  • SKH57 JIS symbol
  • the chemical components of SKH57 used are% by weight, C: l. 26, S i: 0.28, Mn: 0.38, P: 0.008, S: 0.006, Cr: 4.10, Mo: 3.51, W: 10.06, V: 3.22, Co: 9.97, O: 0.27.
  • a quenching treatment is performed at 1180 for 10 minutes
  • a tempering treatment is performed for the first return at 610 at 80 minutes, at the second return at 605 at 80 minutes, The return of 3 was performed at 600 at 80 minutes.
  • the SKH 57 used here has higher hardness at high temperature by containing Mo, abrasion resistance by W containing, and toughness by V containing compared to stainless steel SUS440C (JIS symbol) of general hairdressing scissors material. Are better.
  • the hardness of general barber scissors is "HR 58-60", but with SKH57 material Since “HR 62 to 65” can be held, the blade portions 3 and 4 can be formed of an extremely hard material.
  • the blade portions 3 and 4 by metal powder injection molding, it is possible to use a material such as SKH material, which has been difficult to process by conventional artisans. Thereby, the blade portions 3 and 4 having the substantially straight cutting blade edges 21 and 22 can be formed with higher precision.
  • the blades 3 and 4 are formed by metal powder injection molding, mass productivity is good, and low production costs are realized. For example, scissors, which were generally high in the price of 40,000 to 100,000, which had been made by hand by craftsmen, can be mass-produced by injection molding of metal powder, so a low price of about 20,000 yen is possible become.
  • the blade portions 3 and 4 and the handle portions 5 and 6 may be integrally formed to form a single-blade type such as a general barber and hairdresser, but in the present embodiment, in particular, the blade portion 3 , 4 and the handle portions 5, 6 are formed separately from each other, so that the substantially straight shapes of the cutting edges 21, 22, of the blade portions 3, 4 by metal powder injection molding are made more accurate. Also, by making the blade portions 3 and 4 and the handle portions 5 and 6 surely integrated by caulking, the substantially linear advantages of the cutting edges 21 and 22 can be exhibited more effectively.
  • the blades 3 and 4 are formed of a high-hardness steel material in order to enhance sharpness, but the handles 5 and 6 are made of a light alloy material such as an aluminum alloy or a titanium alloy.
  • a high-hardness steel material for the blades 3 and 4 and the use of a light alloy for the handles 5 and 6 reduces the overall weight, and the weight balance of the scissors is reduced by the blades 3 and 4. Because the hair becomes heavier, the hairdresser can also reduce the fatigue of hair cutting work.
  • the outer surface of the blade portion of the hairdressing scissors usually has a shape called a clam surface (see FIGS. 10 and 11 of a conventional example). This is a study conducted by craftsmen. This is because cutting and polishing operations are performed.
  • the blade portions 3 and 4 can use a high-hardness material by metal powder injection molding, all of the grinding and cutting are performed by an automatic processing machine controlled by a computer. That's why it is.
  • the outer surfaces 27, 28 of the blade portions 3, 4 are constituted by, for example, six continuous plane shapes including the cutting edges 21, 22, as shown in FIGS. 4 and 5. ing.
  • an ultra-thin coating of corrosion resistance and chemical resistance is provided by, for example, ion plating in order to protect from a perm solution and a hair dye solution used in a hairdressing salon. It is about 0.5 m thick. Since this ultra-thin coating is also high in hardness, it prevents the sharpness of the cutting edges 21 and 22 from deteriorating. In addition, ultra-thin coating makes it possible to give beautiful luster colors such as jewelry colors, for example, emerald green, ruby violet, sapphire, gold, etc. Industrial applicability
  • the cutting edge ⁇ of the blade portion of the scissor piece into a substantially linear shape, contact at the time of cutting such as scissors, which is a conventional curved cutting edge, is achieved. Extremely smooth and light cutting action with almost no resistance load. In addition, the life of the blade can be greatly extended by reducing the contact resistance load.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Scissors And Nippers (AREA)

Abstract

Ciseaux comprenant une paire de ciseaux (1, 2) constitués chacun d'une lame (3,4) et d'une branche (5,6) et reliés de manière tournante l'un à l'autre par un pivot (13). Les lames respectives (3,4) sont formées par moulage par injection de poudre métallique. Les tranchants (21, 22) des lames respectives (3,4) sont conçus pour entrer en contact l'un avec l'autre de sorte qu'ils soient sensiblement linéaires, lorsque l'on regarde depuis les côtés les plus épais desdites lames respectives (3,4). Etant donné qu'ils ne viennent pas en contact l'un avec l'autre lors du pliage des lames comme dans les ciseaux classiques, les tranchants (21,22) présentent une faible charge de résistance au contact, ce qui permet un travail de découpe précis et facile. Un matériau de charge de haute dureté qui était jusqu'à maintenant difficile à utiliser dans un pliage classique, peut être employé pour la formation des lames (3,4) avec une grande précision et dans des grandes quantités, le pliage devenant inutile, et présentent des tranchants (21,22) sensiblement linéaires,
PCT/JP1997/002680 1997-08-01 1997-08-01 Ciseaux WO1999006189A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU37081/97A AU3708197A (en) 1997-08-01 1997-08-01 Scissors
PCT/JP1997/002680 WO1999006189A1 (fr) 1997-08-01 1997-08-01 Ciseaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1997/002680 WO1999006189A1 (fr) 1997-08-01 1997-08-01 Ciseaux

Publications (1)

Publication Number Publication Date
WO1999006189A1 true WO1999006189A1 (fr) 1999-02-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/002680 WO1999006189A1 (fr) 1997-08-01 1997-08-01 Ciseaux

Country Status (2)

Country Link
AU (1) AU3708197A (fr)
WO (1) WO1999006189A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140290071A1 (en) * 2013-04-01 2014-10-02 Plus Corporation Scissors

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS455357Y1 (fr) * 1966-04-04 1970-03-13
JPS62181836A (ja) * 1986-02-03 1987-08-10 Iwane Ishida 超硬被膜を形成してなる刃先の製造方法
JPH06304811A (ja) * 1993-04-23 1994-11-01 Matsushita Electric Works Ltd 刃物およびその製造方法
JPH08107984A (ja) * 1994-10-07 1996-04-30 Kaijirushi Hamono Kaihatsu Center:Kk 鋏における刃身の取付構造
JPH08323055A (ja) * 1995-06-06 1996-12-10 Sangi Co Ltd 理美容ハサミ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS455357Y1 (fr) * 1966-04-04 1970-03-13
JPS62181836A (ja) * 1986-02-03 1987-08-10 Iwane Ishida 超硬被膜を形成してなる刃先の製造方法
JPH06304811A (ja) * 1993-04-23 1994-11-01 Matsushita Electric Works Ltd 刃物およびその製造方法
JPH08107984A (ja) * 1994-10-07 1996-04-30 Kaijirushi Hamono Kaihatsu Center:Kk 鋏における刃身の取付構造
JPH08323055A (ja) * 1995-06-06 1996-12-10 Sangi Co Ltd 理美容ハサミ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140290071A1 (en) * 2013-04-01 2014-10-02 Plus Corporation Scissors
JP2014200332A (ja) * 2013-04-01 2014-10-27 プラス株式会社 事務用鋏
US9393704B2 (en) * 2013-04-01 2016-07-19 Plus Corporation Scissors

Also Published As

Publication number Publication date
AU3708197A (en) 1999-02-22

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