EP0515830B1 - Schere - Google Patents

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Publication number
EP0515830B1
EP0515830B1 EP92106827A EP92106827A EP0515830B1 EP 0515830 B1 EP0515830 B1 EP 0515830B1 EP 92106827 A EP92106827 A EP 92106827A EP 92106827 A EP92106827 A EP 92106827A EP 0515830 B1 EP0515830 B1 EP 0515830B1
Authority
EP
European Patent Office
Prior art keywords
screw
scissors
screw nut
nut
drilled hole
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP92106827A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0515830A1 (de
Inventor
Günther Pracht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jaguar Stahlwarenfabrik GmbH and Co KG
Original Assignee
Jaguar Stahlwarenfabrik GmbH and Co KG
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 Jaguar Stahlwarenfabrik GmbH and Co KG filed Critical Jaguar Stahlwarenfabrik GmbH and Co KG
Publication of EP0515830A1 publication Critical patent/EP0515830A1/de
Application granted granted Critical
Publication of EP0515830B1 publication Critical patent/EP0515830B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B26B13/28—Joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/06—Joints
    • B25B7/08—Joints with fixed fulcrum

Definitions

  • the invention relates to scissors, in particular hairdressing scissors, with an articulated connection consisting of an articulated screw and a screw nut, the articulated screw being essentially non-rotatably connected to a pair of scissors and the screw nut on the circumference of a neck extension which engages in a circular recess in the bore of one scissor half , or has on its end facing the bore a first flexible body which bears under pressure on the screw nut and the wall of the bore.
  • Such scissors are known from DE-PS 30 23 057.
  • the steel screw nut of the articulated connection has an annular groove on the circumference of its neck, into which a flexible O-ring is inserted.
  • the O-ring lies under pressure on the neck of the screw nut and the wall of the bore in one half of the scissors.
  • the contact pressure is selected so that the movement of the scissors can be finely regulated by turning the screw nut.
  • the hinge screw of the scissors known from the mentioned publication has two opposite milled surfaces on its shank and engages through a correspondingly designed opening in one half of the scissors, the upper bowl, so that it is essentially non-rotatably connected to the upper bowl of the scissors.
  • the movement play between the nut and the hinge screw is particularly disruptive when cutting with precision scissors of the type mentioned at the beginning.
  • Today's precision scissors have a closing pressure of approx. 30 g, which is set electronically. Due to the very low closing pressure, the play between the shaft of the hinge screw and the opening in the Oberbeck or the nut and the hinge screw is noticeable through impact. These noticeable blows are felt by the person operating the scissors, e.g. the hairdresser found it uncomfortable. In addition, the joint screw is subject to greater wear due to the impacts. It should be noted that the scissors are operated about a thousand times in a normal haircut.
  • the invention has for its object to provide a pair of scissors of the type mentioned, in which the aforementioned play in the shaft of the hinge screw and the opening in the upper bowl or the nut and the hinge screw prevented and thus the previously when cutting with precision scissors noticeable blows can be excluded.
  • the nut has on its inner wall an annular groove in which a second annular body made of flexible material is arranged, the inner diameter of which is smaller than the thread diameter of the joint screw.
  • the screw nut contacts the shaft of the joint screw while exerting a pressing pressure.
  • the screw nut lies non-rotatably on the Oberbeck scissors, play between the joint screw and the Oberbeck is avoided. Therefore, even with precision scissors with an extremely low closing pressure, there are no more shocks during the cutting process.
  • the inner diameter of the second annular body resting on the shaft of the joint screw is preferably selected to be smaller than the core diameter of the thread of the joint screw. This dimensioning achieves a higher pressure between the nut and the hinge screw.
  • the annular groove is arranged on the end region of the screw nut opposite the bore in the one half of the scissors.
  • the screw nut preferably has a blind hole on its end face opposite the hole in the half of the scissors, the diameter of which is larger than the thread diameter of the joint screw and in which the annular groove is arranged.
  • the annular groove can expediently be arranged on the end of the blind hole facing away from the end face of the screw nut.
  • a groove has so far been formed in the face of the nut.
  • the nut can be actuated by inserting a tool into this groove.
  • Such a groove is not suitable for the scissors according to the invention if the annular groove is arranged in the front end region of the inner wall of the screw nut.
  • a ring nut is therefore preferably provided as a further embodiment of the screw nut based on the invention.
  • the screw nut according to the invention can also be used as a polygonal nut, e.g. be designed as a hexagon nut.
  • This embodiment also has the advantage that the diameter of the screw nut can be made relatively small. A key to operate the nut can be supplied with the scissors.
  • the screw nut can have a neck extension, on the circumference or end face of which an annular groove is arranged, in which a first flexible body in the form of an O-ring is mounted.
  • the first flexible body which bears against the screw nut and the wall of the bore in one half of the scissors is designed as a molded part, the outside of the bore and the inside of which is adapted to the diameter of the articulated screw and which has an end face on the one for the bore facing end face of the nut under pressure. The pressure is achieved by tightening the hinge screw or the nut.
  • the flexible molded part also exerts a radial force on the shaft of the hinge screw, so that the pressure under which the screw nut bears against the shaft, and thus the effect of the second annular flexible body arranged on the inner wall of the screw nut, is further increased .
  • the bore of the one scissor half has a constriction in its end area facing away from the screw nut and its end area facing the screw nut has an enlargement as a circular recess, the transition area between the two end areas being conical. Due to the taper of the intermediate area, the force component directed towards the shaft of the joint screw is further strengthened when the elastic molded part is pressed together by tightening the joint screw or the nut.
  • the screw nut expediently has a short neck extension with which it is guided in the circular recess of the bore or a circular recess of the molded part and compresses the flexible molded part in the bore.
  • the cross section of the narrowed end region of the bore can correspond to the cross section of the shaft of the gel countersunk screw.
  • the shaft expediently has two opposite flat surfaces which can be milled.
  • the inner diameter of the narrowed end region of the bore is larger than the largest outer diameter of the joint screw. In this case it extends flexible molded part in the narrowed end area of the bore.
  • the narrowed end region of the bore has a rectangular punched-out area.
  • the flexible molded part has the advantage over an annular flexible body arranged on the circumference of the neck of the screw nut that the articulated connection can also be set in a safe manner by a non-specialist. Since the ring-shaped body arranged on the circumference of the neck of the screw nut creates a pressing pressure between the screw nut and the inner wall of the bore in one half of the scissors even when the connection is still loose, it is not easy for the non-specialist, in particular when adjusting and refitting after cleaning the scissors to set the articulation correctly. In this case, the joint, which initially appears to be solid, becomes loose after a certain time. On the other hand, the molded part which is adapted to the inner wall of the bore and which is compressed by tightening the articulated connection permits a 100% reliable setting.
  • the articulated connection shown in FIGS. 1 to 5 for a pair of scissors consists of an articulated screw 1 and a screw nut 3 provided with a neck attachment 2.
  • the head 4 of the hinge screw 1 is dome-shaped on the back and lies with this part in a pan-like recess in the lower pelvis of the scissors, which can also be formed by a suitable contact part.
  • the shaft 5 of the joint screw 1 has two parallel flats 6.
  • the articulated screw 1 engages with the shaft 5 through an opening of the lower pelvis with play and an opening of the upper pelvis with a play that is as small as possible only due to the manufacture.
  • the opening of the upper pelvis has flats corresponding to the flats 6 of the shaft 5 of the hinge screw 1, with which the shaft 5 cooperates, so that the hinge screw 1 is connected in a rotationally fixed manner to the upper bowl except for the play mentioned.
  • the screw nut 3 shown in Fig. 1 is guided on the threaded end of the hinge screw 1. With its neck 2 it is mounted in a circular recess in the upper pelvis.
  • the neck extension 2 has an annular groove 8 on its circumference, in which a first annular body 9 made of flexible material is mounted and presses against the neck extension 2 of the screw nut 3 and the wall of the recess in the upper part of the scissors.
  • the nut 3 has an annular groove 10 on its inner wall, in which a second annular body 11 made of flexible material is arranged, the inner diameter of which is smaller than the thread diameter and moreover somewhat smaller than the core of the thread of the joint screw 1.
  • this second annular body 11 rests under pressure on the inner wall of the screw nut 3 and the shaft 5 of the joint screw 1.
  • the screw nut 3 has on its end face opposite the neck extension 2 a blind bore 12, the diameter of which is larger than the thread diameter of the joint screw 1.
  • the annular groove 10 is on the End of the blind bore 12 facing away from the end face of the nut 3.
  • the annular projection 13 of the inner wall on the end face of the screw nut 3 prevents the annular body 11 from falling out.
  • the screw nut 3 In order to enable the screw nut 3 to be easily rotated in order to regulate the movement of the scissors, the screw nut 3 is provided with knurling 14 on its circumference, as shown in FIG. 1.
  • FIGS. 4 and 5 show a further exemplary embodiment of a screw nut 15 provided with a neck extension 7, which is designed as a hexagon nut.
  • the end face of the screw nut 15 merges into a dome-shaped area 16, which is adjoined by an area 17 consisting of six flat side faces.
  • the screw nut 15 is designed like the screw nut described in the above exemplary embodiment. In particular, it has a blind bore 12 on its end face, at the end of which an annular groove 10 is arranged for receiving a second flexible, annular body 11.
  • the first flexible body bearing against the screw nut 18 and the wall 19 of the bore 20 of the one pair of scissors 21 is designed as a molded part 22, the outside of the bore 20 and the inside of the diameter of the Articulated screw 1 is adapted and which rests with an end face 23 on the end face of the screw nut 18 facing the bore 20 under pressure.
  • the flexible molded part 22 is produced as a rubber-like, highly elastic injection molded part.
  • the bore 20 of one scissor half 21 has in its end region 24 facing away from the screw nut 18 a constriction and in its end region 25 facing the screw nut 18 an expansion as a circular recess, the transition region 26 between the two end regions 24 and 25 being conical.
  • the screw nut 18 has a short neck extension 27 with which it is guided in a circular recess in the molded part 22 and presses the flexible molded part 22 between the wall of the bore 20 and the shaft 5 of the joint screw 1.
  • a non-positive connection between the nut 18 and the shaft 5 of the joint screw 1 is achieved via the flexible molded part 22. This positive connection strengthens the effect of the annular flexible body 11 arranged in the annular groove 10 of the screw nut 18.
  • the end region 24 of the bore 20 facing away from the screw nut 18 is designed in the form of a rectangular punching, as can be seen in FIG. 7.
  • the diameter of this punch is larger than the diameter of the shaft 5 of the joint screw 1, so that the elastic molded part 22 extends between the narrowed end region 24 and the shaft 5 of the joint screw 1. Due to the cross-sectional shape of the shaft 5 and the narrowed end region 24, the articulated screw 1 is adequately secured against rotation with respect to the one scissor half 21.
  • the bore 20 in the scissor half 21 can be carried out in such a way that the scissor half 21 is first provided with a cylinder bore which corresponds approximately to the smallest diameter of the narrowed end region 24.
  • the enlarged end region 25 facing the screw nut 18 is then produced in the form of a circular recess through a corresponding blind hole.
  • the conical transition region 26 is achieved by using a twist drill. In this case, the inclination of this area is predetermined by the twist drill and is preferably 60 ° with respect to the axial direction of the bore 20.
  • the cylindrical bore in the narrowed end area 24 is then expanded to a square cross-sectional shape by punching out.
  • the flexible molded part 22 is adapted both in the enlarged end region 25 and in the narrowed end region 24 on its outside of the bore 20 of the scissor half 21 and on its inside to the cross section of the shaft 5 of the joint screw 1.
  • the shape of the molded part 22 is shown in more detail in FIGS. 8 and 9.
  • the walls of the molded part corresponding to the regions 24, 25 and 26 of the bore 20 are designated by 24 ', 25' and 26 'in FIGS. 8 and 9. Due to the square punching of the narrowed end region 24 and the lateral flattening of the shaft 5 of the joint screw 1, a sufficient anti-twist protection between the joint screw 1 and the scissor half 21 is ensured.
  • the molded part 22, which is in contact with the bore 20 and the shaft 5 under pressure, further prevents play between the joint screw 1 and the bore 20.
  • the other half of the scissors 28, the lower section, is also provided with an identical bore 20. Because the diameter of the narrowed End region 24 is larger than the diameter of the shaft 5 everywhere, the joint screw 1 can rotate relative to the other scissor half 28.
  • the dome-shaped head 4 of the joint screw 1 on its underside is supported by a plastic sliding ring 29 in the enlarged end region 25 of the bore 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Scissors And Nippers (AREA)
EP92106827A 1991-05-28 1992-04-22 Schere Expired - Lifetime EP0515830B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117396 1991-05-28
DE4117396A DE4117396C1 (it) 1991-05-28 1991-05-28

Publications (2)

Publication Number Publication Date
EP0515830A1 EP0515830A1 (de) 1992-12-02
EP0515830B1 true EP0515830B1 (de) 1995-06-21

Family

ID=6432603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106827A Expired - Lifetime EP0515830B1 (de) 1991-05-28 1992-04-22 Schere

Country Status (5)

Country Link
US (1) US5319854A (it)
EP (1) EP0515830B1 (it)
JP (1) JP3084135B2 (it)
DE (2) DE4117396C1 (it)
ES (1) ES2074758T3 (it)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0730842Y2 (ja) * 1993-02-24 1995-07-19 タキゲン製造株式会社 密閉ハンドル装置
US5560107A (en) * 1995-08-14 1996-10-01 Herbert; Paul W. Cutting tool
DE19614691C1 (de) * 1996-04-13 1997-07-24 Jaguar Stahlwarenfabrik Gmbh Schere
US5689424A (en) * 1996-08-23 1997-11-18 Pitney Bowes Inc. Encoded screen records for international postage meters
TW358059B (en) * 1996-11-07 1999-05-11 King Jim Co Ltd Adhesive tape processing device
DE19841634A1 (de) * 1997-09-25 1999-04-01 Wella Ag Schere mit einer Gelenkspieleinstelleinrichtung
TWM241200U (en) * 2003-08-28 2004-08-21 Ming Chia Scissors Company Ltd Improved structure for hairdressing scissors
DE102005022393B4 (de) * 2005-02-16 2015-09-24 Josef Luber Hufmesser mit beweglich gelagerter Klinge
JP2006230880A (ja) * 2005-02-28 2006-09-07 Matetsuku Matsuzaki:Kk 鋏における鋏体の枢着装置
US20070124942A1 (en) * 2005-12-07 2007-06-07 Nenadich Stephen M Ball bearing tension system for a shear
US20090113723A1 (en) * 2007-11-02 2009-05-07 Cheng-Yao Kao Safety device for garden pruners
US20090277019A1 (en) * 2008-05-06 2009-11-12 Mueller Kerry M Child resistant safety scissor
EP2682615B1 (de) * 2012-07-03 2017-09-20 NEDSCHROEF PLETTENBERG GmbH Mutter
DE102013110676A1 (de) * 2013-09-26 2015-03-26 Betek Gmbh & Co. Kg Meißel
US10393395B1 (en) * 2015-05-07 2019-08-27 Aamzon Technologies, Inc. Ice melting louver
JP6048772B1 (ja) * 2015-07-06 2016-12-21 セイコーインスツル株式会社 切断機およびはさみ
USD781673S1 (en) * 2015-11-12 2017-03-21 Fiskars Finland Oy Ab Tree pruner
CN107182827A (zh) * 2017-07-10 2017-09-22 苏州佩德漫特工贸有限公司 安全型宠物趾甲剪
USD904150S1 (en) * 2018-03-01 2020-12-08 Acme United Corporation Hub for cutting device
US20190270208A1 (en) * 2018-03-01 2019-09-05 Acme United Corporation Low Friction Pivot Assembly for Scissors
JP6916557B1 (ja) * 2020-10-26 2021-08-11 足立工業株式会社 理美容鋏
US11865734B2 (en) * 2021-08-04 2024-01-09 Chao Wei Slide cutting shears

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7609410U1 (it) * 1900-01-01 Fritz Bracht, Stahlwarenfabrik, 5650 Solingen
US3001567A (en) * 1955-10-06 1961-09-26 Adelaide E Brill Self-locking and self-sealing plastic fastening devices
FR1202706A (fr) * 1958-01-30 1960-01-12 Wagner Guenter Dispositif de sécurité ou de verrouillage pour éléments de fixation, tels que vis, écrous, etc., contre un desserrage spontané
FR1304044A (fr) * 1961-06-29 1962-09-21 Simmonds Sa Perfectionnement aux organes d'assemblage filetés
JPS50497Y1 (it) * 1970-08-13 1975-01-09
JPS51111560A (en) * 1975-03-26 1976-10-01 Naniwa Seitei Kk Locking method of thread joint
SE433248B (sv) * 1976-04-07 1984-05-14 Christian Flaig Sekerhetsmutter
DE2904537C2 (de) * 1979-02-07 1981-05-14 Robert Bosch Gmbh, 7000 Stuttgart Betätigungsssicherung für ein Betätigungsglied, insbesondere für Kraftfahrzeuge, bei Brennkraftmaschinen und der Kraftstoffversorgungsanlage
DE3023057C2 (de) * 1980-06-20 1982-04-08 Jaguar Stahlwaren Vertriebsgesellschaft Mbh & Co Kg, 5650 Solingen Schere
US4408927A (en) * 1981-08-17 1983-10-11 Gearhart Industries, Inc. Threaded joint toggle-locked with a helical spring
US4701088A (en) * 1985-11-06 1987-10-20 Textron Inc. Undercut sealing threaded fastener
US4887951A (en) * 1987-12-16 1989-12-19 Maruemu Seisakusho Co., Ltd. Dual composite headed self-threading screw
US5060381A (en) * 1990-08-13 1991-10-29 Taberlet Jean Jacques Pair of scissors, in particular for use in the cutting of hair
US5193603A (en) * 1991-12-12 1993-03-16 Whisnant Displays, Inc. Display framing apparatus

Also Published As

Publication number Publication date
DE4117396C1 (it) 1992-04-23
JP3084135B2 (ja) 2000-09-04
ES2074758T3 (es) 1995-09-16
EP0515830A1 (de) 1992-12-02
JPH05154259A (ja) 1993-06-22
US5319854A (en) 1994-06-14
DE59202595D1 (de) 1995-07-27

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