WO1989009116A1 - Tenailles autobloquantes et procede de production de tenailles autobloquantes destinees a des materiaux ronds et hexagonaux - Google Patents

Tenailles autobloquantes et procede de production de tenailles autobloquantes destinees a des materiaux ronds et hexagonaux Download PDF

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Publication number
WO1989009116A1
WO1989009116A1 PCT/DK1988/000058 DK8800058W WO8909116A1 WO 1989009116 A1 WO1989009116 A1 WO 1989009116A1 DK 8800058 W DK8800058 W DK 8800058W WO 8909116 A1 WO8909116 A1 WO 8909116A1
Authority
WO
WIPO (PCT)
Prior art keywords
jaw
handle
tongs
self
locking
Prior art date
Application number
PCT/DK1988/000058
Other languages
English (en)
Inventor
Axel Grønlund NIELSEN
Original Assignee
Nielsen Axel Groenlund
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 Nielsen Axel Groenlund filed Critical Nielsen Axel Groenlund
Publication of WO1989009116A1 publication Critical patent/WO1989009116A1/fr

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Classifications

    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/10—Spanners; Wrenches with adjustable jaws
    • B25B13/28—Spanners; Wrenches with adjustable jaws the jaws being pivotally movable
    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B25B13/50—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes
    • B25B13/5008—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects
    • B25B13/5016—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe
    • B25B13/5025—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe using a pipe wrench type tool
    • B25B13/5041—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe using a pipe wrench type tool with movable or adjustable jaws
    • B25B13/505—Pivotally moving or adjustable

Definitions

  • Self-locking tongs and a method of producing self-locking tongs intended for round and hexagonal material.
  • the invention relates to a method of producing self-locking tongs 5 intended for round and hexagonal material.
  • the self-locking tongs consist in the main of a handle part with a spiral-shaped and, as a rule, serrated jaw, a pivot located at the polar centre of the latter, as well as a jaw part capable of rotating about a 0 pivot, with two locking faces forming a V-shaped opening with a top angle of 60° .
  • Self-locking tongs of this kind have been kncwn for many years. They are used frequently in Eastern Europe and in the East, whereas they have 5 not become very widespread either in Western Europe or the U.S.A.
  • the self-locking tongs according to the invention are special in that they are manufactured from an entirely new type of steel sheet produced in accordance with entirely new technology, which after coding, hardening and tempering has excellent characteristics including high core resistance, yield point and surface hardness, and w r hich, further- more, after surface finishing has an attractive appearance with clean contours free from burrs and visible traces of the manufacturing processes, with especially sharp teeth and a very markedly different type of curvature. They are simple and, in spite of the fact that their weight is low, they are strong, their strength being so high that they can be supplemented by a shaft extender.
  • the sharp teeth which after a prolonged period of use will continue to remain sharp owing to the high breaking and wear resistance of the material and the very high surface hardness of Re 60-62 enter - if the tongs grip e.g. a tubular object - immediately into powerful contact with the surface of the object, as soon as a slightly backward pull is applied to the handle, thus inducing a starting friction, which, through the boosting of forces, directly increases in proportion with the torque applied to the tongs.
  • the new type of curvature the subject of a special patent application, will ensure that the progressive grip corresponds at all times to the handle moment applied to the tongs and that said "grip" will at all times have such a value that the deformation forces remain at a minimum.
  • tongs provided with teeth operate mainly by friction together with large point loads, one will, as a rule, see tooth marks, the size of which depends on the moment applied and the hardness of the object. When gripping smooth, hard objects also small marks are produced - small but still in evidence. In order to counter ⁇ act this phenomenon, certain tongs can be provided with loose jaws. These jaws are to consist of at least two basic constituents, i.e. a strong and tough basic material mixed with a large number of fine-grained and sharp particles of another material, the hardness of which must always be greater than the hardness of the object on which the tongs are to develop their grip.
  • nylon will be the right basic material, and the latter can then be filled with particles consisting in the main of silicon, which are therefore capable of ensuring that the tongs can develop their grip, these particles being, on the other hand, so small that they produce virtually no disfiguring traces. If the tongs are to be used for many hours on materials with a hardness Re 6C-62 use must be made of jaws produced of compound steel with analogous characteristics. This must be regarded in the same way as a winter tyre, which is based on the advantageous interplay between rubber and hardmetal, where the rubber is replaced by a tough steel.
  • the loose jaws are produced according to a special process as precision-cast objects, ready for mounting in the plate parts of the tongs. If required, these jaws can be produced with separateparticles in a smooth surface and in quite the other extreme form, i.e. with pronounced teeth filled with the hard particles. In case of need, jaws can also be produced so as to make tongs capable of gripping objects with special profiles.
  • Conventional two-bar-type tongs with one bar constituting the arm and handle of the tongs themselves and another smaller bar serving as the operating or activating bar are generally not described as self-locking, even though in fact they are after all self-locking once they have been activated.
  • tongs of this type are also self-locking in all the cases in which the jaw teeth get a proper grip on the surface of the object. If such two-grip- type tongs are provided with jaws of the type described, they therefore become self-locking, which explains and justifies claim 6.
  • figs. 1, 2, 3 an - 4 show the four basic models in perspective while figs. 5 > 6 and 7 show the models with loose jaws attached respectively.
  • Fig. 1 shows the so-called "standard" model
  • Figs. 1 - 4 show that the tongs consist mainly of handle part (l), jaw part (2), pivot (3) and handle (4), as well as in case of the double model additionally jaw part (7) and jaw part (8).
  • the handle parts (1) and jaw parts (2) are stamped and cut by laser from steel sheet alloyed with boron with the composition C. 0.2, Mn 1 , Cr 0.5 S B 0.002 and are, in the plane state, entirely identical with all four models of the same size, and they are stamped or cut, respectively, complete with teeth and holes, and they new only require to be bent and embossed, which is done in such a way that so-called "left-hand” and "right-hand” blanks are produced.
  • the handle jaw parts are provided with a longitudinal recess at either side of the handle. These recesses are used in fig. 1 and in fig. 4 for mounting and locking the plastic handle, as is shown in sectional form at the side of fig. 4- The same figures show that a "double" model, fig. 4 , can be produced by combining "right-hand” and "left-hand” blanks with the additional jaw parts (7) and (8).
  • the plastic handle (4) is easy to grip and covers the sharp edges of the steel plates, while at the same time the plastic handle is well protected by the steel plates against overloading, if the tongs are supplemented with a tubular extender, which must be taken all the way past the outer end of the plastic part.
  • Fig. 2 and fig. 3 show the "half" models, which, at the same size, consist of the same steel sheet blanks.
  • the same plastic handle is not suitable for these models, but use must be made of a corresponding two- part handle, or as shov.n of a rubber handle (4) or alternatively one consisting of shrink plastic, unless one prefers to supply a model without handle by omitting the recesses in the steel parts. If that is the case, the side edges must be "edge-ground” or "edge-dressed", and the same applies to all other sharp edges which must not be sharp.
  • these "half" tongs can transmit a relatively very high moment and have e.g. proved particularly suitable for loosening hardened sheet metal screws, which - even with still very weak corrosion - can virtually not be removed, also if they are provided with ordinary slits or cross-slits, even when using the correct screwdriver, so that instead use must be made of small chisels, which e.g. quickly produce major, costly damage to latter.
  • Fig. shows tongs, where handle jaw part (1) is provided with an attached loose jaw (9) and assembled with two jaw parts (2), between which there is a loose jaw (10).
  • Fig. 6 shows tongs consisting of two handle jaw parts (1 ) with a recess with oblique corner cut-outs, which, without rivets, can hold fast the loose jaw, as well as two jaw parts (2) with a space at the bottom between them for mounting a loose jaw part.
  • the upper part of jaw parts (2) is extended upward by comparison with conventional ones and are, In addition, bent towards one another so that they can be placed in the space between handle jaw parts (2) on pivot (3).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

La présente invention décrit un procédé de production d'une tenaille autobloquante permettant de saisir des corps de préférence ronds et hexagonaux, les mâchoires de la tenaille agissant par interaction avec le corps en trois endroits essentiellement séparés entre eux par un arc de 120°. La tenaille comprend en outre une section de mâchoire tournante (2) ayant deux surfaces de mâchoire formant entre elles un angle principalement de 60°, la section de mâchoire étant fixée pivotante à une section de mâchoire de poignée (1) portant une troisième surface de mâchoire destinée à constituer le troisième point d'interaction avec le corps. Comme matériau de flan, on utilise une tôle d'acier pouvant être trempée, telle qu'une tôle d'acier à alliage de bore avec des pourcentages en poids de: 0,2 à 0,25 C, 0,5 à 1,5 Cr, 0,8 à 1,5 Mn et 0,002 à 0,003 de B. La section de poignée (1) et/ou la section de mâchoire (2) sont produites par découpage au laser et les surfaces de mâchoires subissent une cémentation et une trempe dans une profondeur de 0,1 à 0,15 mm essentiellement, suivies par une trempe et un recuit destinés à leur conférer une dureté de l'ordre de 60 à 62 Rc.
PCT/DK1988/000058 1986-10-03 1988-03-30 Tenailles autobloquantes et procede de production de tenailles autobloquantes destinees a des materiaux ronds et hexagonaux WO1989009116A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK473686A DK473686A (da) 1986-10-03 1986-10-03 Fremgangsmaade til fremstilling af selvspaendende tang

Publications (1)

Publication Number Publication Date
WO1989009116A1 true WO1989009116A1 (fr) 1989-10-05

Family

ID=8136222

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1988/000058 WO1989009116A1 (fr) 1986-10-03 1988-03-30 Tenailles autobloquantes et procede de production de tenailles autobloquantes destinees a des materiaux ronds et hexagonaux

Country Status (2)

Country Link
DK (1) DK473686A (fr)
WO (1) WO1989009116A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534592A1 (fr) * 1991-08-26 1993-03-31 Young Sik Woo Clé serre-tubes
FR2709995A1 (fr) * 1993-09-17 1995-03-24 Atea Procédé de découpage de bandes d'acier bore assemblées en cellules.
FR2736857A1 (fr) * 1995-07-19 1997-01-24 Bost Garnache Ind Pince multiprise entrepassee
CN108081184A (zh) * 2017-12-30 2018-05-29 王洪继 一种易于加工的棘轮扳手

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK473686A (da) * 1986-10-03 1988-04-04 Axel Groenlund Nielsen Fremgangsmaade til fremstilling af selvspaendende tang
DK473586A (da) * 1986-10-03 1988-04-04 Axel Groenlund Nielsen Selvspaendende tang
CN114310762B (zh) * 2021-12-31 2023-10-31 中车青岛四方机车车辆股份有限公司 管路夹钳

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US668467A (en) * 1900-11-19 1901-02-19 Moses Z Viau Pipe-wrench.
US2211587A (en) * 1938-12-30 1940-08-13 Charles A Thompson Frame for badminton and tennis rackets
WO1981001385A1 (fr) * 1979-11-20 1981-05-28 E Larsen Cle a autoserrage
GB2086792A (en) * 1980-11-07 1982-05-19 Microsurgical Administrative S Gripping devices
EP0111627A1 (fr) * 1982-12-11 1984-06-27 Gernot Mathias Hirse Clé ouverte à auto-serrage pour vis hexagonales de dimensions différentes
GB2159757A (en) * 1984-06-05 1985-12-11 Tovarne Strojarskej Tech Tongs or wrenches
DK473686A (da) * 1986-10-03 1988-04-04 Axel Groenlund Nielsen Fremgangsmaade til fremstilling af selvspaendende tang
DK473586A (da) * 1986-10-03 1988-04-04 Axel Groenlund Nielsen Selvspaendende tang

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US668467A (en) * 1900-11-19 1901-02-19 Moses Z Viau Pipe-wrench.
US2211587A (en) * 1938-12-30 1940-08-13 Charles A Thompson Frame for badminton and tennis rackets
WO1981001385A1 (fr) * 1979-11-20 1981-05-28 E Larsen Cle a autoserrage
GB2086792A (en) * 1980-11-07 1982-05-19 Microsurgical Administrative S Gripping devices
EP0111627A1 (fr) * 1982-12-11 1984-06-27 Gernot Mathias Hirse Clé ouverte à auto-serrage pour vis hexagonales de dimensions différentes
GB2159757A (en) * 1984-06-05 1985-12-11 Tovarne Strojarskej Tech Tongs or wrenches
DK473686A (da) * 1986-10-03 1988-04-04 Axel Groenlund Nielsen Fremgangsmaade til fremstilling af selvspaendende tang
DK473586A (da) * 1986-10-03 1988-04-04 Axel Groenlund Nielsen Selvspaendende tang

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
K.E. THELNING, Stal och Varmebehandling, Karlebo, Hungary 1985, pages 440-442. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534592A1 (fr) * 1991-08-26 1993-03-31 Young Sik Woo Clé serre-tubes
FR2709995A1 (fr) * 1993-09-17 1995-03-24 Atea Procédé de découpage de bandes d'acier bore assemblées en cellules.
FR2736857A1 (fr) * 1995-07-19 1997-01-24 Bost Garnache Ind Pince multiprise entrepassee
CN108081184A (zh) * 2017-12-30 2018-05-29 王洪继 一种易于加工的棘轮扳手

Also Published As

Publication number Publication date
DK473686D0 (da) 1986-10-03
DK473686A (da) 1988-04-04

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