EP0184073B1 - Clé à tubes - Google Patents

Clé à tubes Download PDF

Info

Publication number
EP0184073B1
EP0184073B1 EP85114748A EP85114748A EP0184073B1 EP 0184073 B1 EP0184073 B1 EP 0184073B1 EP 85114748 A EP85114748 A EP 85114748A EP 85114748 A EP85114748 A EP 85114748A EP 0184073 B1 EP0184073 B1 EP 0184073B1
Authority
EP
European Patent Office
Prior art keywords
lever
jaw
pipe tongs
tongs according
slide
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
Application number
EP85114748A
Other languages
German (de)
English (en)
Other versions
EP0184073A2 (fr
EP0184073A3 (en
Inventor
Fritz Knebel
Rudolf Dassel
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.)
Belzer-Dowidat Werkzeug-Union GmbH
Original Assignee
Belzer-Dowidat Werkzeug-Union GmbH
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 Belzer-Dowidat Werkzeug-Union GmbH filed Critical Belzer-Dowidat Werkzeug-Union GmbH
Publication of EP0184073A2 publication Critical patent/EP0184073A2/fr
Publication of EP0184073A3 publication Critical patent/EP0184073A3/de
Application granted granted Critical
Publication of EP0184073B1 publication Critical patent/EP0184073B1/fr
Expired legal-status Critical Current

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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
    • B25B13/12—Spanners; Wrenches with adjustable jaws the jaws being slidable
    • B25B13/16—Spanners; Wrenches with adjustable jaws the jaws being slidable by screw or nut
    • 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
    • B25B13/32—Spanners; Wrenches with adjustable jaws the jaws being pivotally movable by cam, wedge or lever
    • 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

  • the invention relates to a pipe wrench with a first jaw fixedly attached to a first lever, a second lever which can be pivoted relative to the first lever and carries an articulated second jaw, a slide which is connected to the second lever via a joint and which can be changed the jaw width is adjustable along the first lever and with two stops that limit the pivoting movement of the second jaw in the direction of the first lever and in the opposite direction.
  • Such pipe wrenches are used for turning pipes, screws and other objects.
  • the two levers are pressed together by hand so that the jaws firmly grip the object.
  • the two levers are pivoted in the opposite direction without being pressed firmly together. So that the pipe wrench can apply force in both directions of rotation, the second jaw is pivotally attached to the slider in such a way that, depending on the desired direction of rotation, it either hits a stop of the first lever or an opposite stop of the slide.
  • the gripping surfaces of the two jaws are inclined half to one side and half to the other.
  • the invention has for its object to provide a pipe wrench of the type mentioned, which allows a further opening of the jaws with reduced pivoting of the second lever when turning back.
  • At least one of the stops is arranged on a slide which can be locked in a working position by a movement of the second lever-controlled blocking element and which allows the slide to retreat when the second lever is pivoted out.
  • the stop which forms one end of the slider, can thus be changed as a function of the pivoting position of the second lever with respect to the first lever. If the second lever is swung out, the movable jaw pushes the slider back so that the original stop position is released and the slider can be moved further than is possible in the working position. This greater pivoting of the second jaw increases the effective mouth width, so that the second lever for turning back the pipe wrench empty has to be pivoted out less than would be the case with a fixed stop.
  • the gripping surface of the second jaw formed by teeth is flat. In the position in which the second jaw abuts the stop of the first lever, this gripping surface is inclined at an acute angle in one direction to the likewise flat gripping surface of the fixed jaw. When the second jaw is in its other stop position, its gripping surface is inclined at an acute angle in the opposite direction to the gripping surface of the fixed jaw. Both gripping surfaces are parallel to each other only in the middle position of the swivel path of the second jaw. However, this middle position is unstable because the second jaw is then not on one of the stops. It automatically adjusts to that stable position that corresponds to the direction in which the object clamped between the jaws is rotated with force. The second jaw cannot accidentally fold over.
  • the blocking element is preferably connected to the second lever via at least one articulated arm. This articulated arm causes the blocking element to be carried along when the second lever is pivoted open.
  • the blocking element can have an oblique sliding surface following a blocking surface which runs essentially parallel to the rear surface of the sliding piece.
  • the blocking element is guided by a guide piece of the slide and against the Supported pressure of the slide.
  • the slide has only a control function, while the force is absorbed by the guide, which is an integral part of the slide, the position of which determines the width of the pipe wrench.
  • the pipe wrench shown has a first lever 10 which is designed as a handle 11 at the lower end.
  • a threaded section 12 adjoins the handle 11, on which a nut 13 sits.
  • the handle 11 and the threaded portion 12 are made from a round bar.
  • a plate 14 is attached laterally, which extends the round rod, but whose axis is laterally offset from that of the round rod.
  • the fixed jaw 15 protrudes laterally from the upper end of the plate 14.
  • the engagement surface 16 of this jaw 15 extends at right angles to the handle 11. Teeth are arranged on this engagement surface 16, the tips of which lie in a common plane.
  • the nut 13 supports the slide 17, which is sleeve-shaped and has a slot for the passage of the lower end of the plate 14.
  • a shoulder 18 projecting laterally from the slide 17 is provided with a bolt 19 which projects through a slot 20 in the plate 14.
  • the bolt 19 serves to guide the slide 17, which is supported at the lower end by the nut 13, with respect to the lever 10, so that it can be displaced along this lever.
  • the second lever 21 also has a bolt 22 which is guided in the slot 20 of the first lever 10.
  • the second lever 21 is connected to the slide 17 via the joint 23, so that the lever 21 can be pivoted about the joint 23 relative to the slide 17.
  • Another joint 24, which connects the second jaw 25 to the second lever 21, is arranged laterally next to and above the joint 23.
  • the second jaw 25 can be pivoted about the joint 24, in one direction up to the stop 26, which is formed by the plate 14 of the first lever 10 and in the opposite direction up to a stop 27, which will be explained .
  • the uniformly toothed contact surface 28 of the jaw 25 is flat.
  • its contact surface 28 forms an acute angle with the contact surface 16 of the other jaw 15.
  • the two mentioned engagement surfaces also form an acute angle, but towards the opposite side.
  • the target surface can thus oscillate around its parallel position to the target surface 16.
  • the stop 27 is located at the upper end of the slider 29, which is displaceably housed inside the slide 17 and is guided approximately parallel to the handle 11 between the wall of the slide 17 and a transverse pin 46 of this slide.
  • the cross pin 46 also serves to guide the blocking element 31 and thus performs a double function.
  • This blocking element has a blocking surface 32, which runs parallel to the support surface 30, and also a sliding surface 33, which extends at an acute angle to the sliding surface 30.
  • the blocking element 31 is supported by a guide piece 34 which is fixedly attached to the slide 17.
  • the blocking element 31 is arranged between the guide piece 34 and the slide piece 29 and it can be displaced parallel to the support surface 30.
  • the blocking element 31 is displaced via the articulated arm 35, via which the blocking element 31 is connected to the second lever 21.
  • This articulated arm 35 has at its end an articulated ball 36 which is pivotally mounted in
  • the hinge 23, with which the second lever arm 21 is mounted on the slide 17, consists of a hinge pin 37 which is fixedly attached to the slide 17 and an elongated hole 38 of the second lever arm 21.
  • the elongated hole 38 extends in the illustration according to FIG. 1 preferably in the direction of the joint 24 and thus obliquely upwards.
  • the joint 24 consists of a pin 39 fixedly attached to the jaw 25, which can be displaced in an elongated hole 40 of the second lever arm 21.
  • the elongated hole 40 is oriented approximately transversely to the direction of the two engagement surfaces 16 and 28.
  • the one lever arm of the lever 21 forms the handle 41 and the other lever arm is determined by the distance between the joints 23 and 24.
  • the lever 21 is thus two-armed and, because of the large lever arm ratio, it brings about a high level of force amplification.
  • the mouth width of the pipe wrench is adjusted by adjusting the nut 13 on the threaded section 12. As a result, the slide 17 moves along the first lever 10, the second lever 21 being carried along and the pins 19 and 22 being guided in the slot 20.
  • the pipe wrench works as follows:
  • FIG. 1 shows the state in which a cylindrical object 42, which is clamped between the jaws 15 and 25, is to be rotated clockwise.
  • the nut 13 is adjusted so that when the levers 10 and 21 are later pressed together in the direction of the arrows 43, the object 42 is held between the jaws 15 and 25 without the levers 10 and 21 being pressed apart under the pressing effect of the object 42 .
  • the inclined surface 33 of the blocking element 31 pushes the slider 29 upwards until finally the blocking surface 32 abuts the support surface 30.
  • the pressure that the pivotable jaw 25 exerts on the slide 29 creates a friction between the surfaces 30 and 32, which prevents the tong levers 10 and 21 from being spread apart again under the pressure of the object 42.
  • the pipe wrench is pivoted by pressure against the lever 21 in the direction of the arrow 44 in order to rotate the object 42 with force. It is not necessary to maintain the locking force in the direction of the arrows 43 since the pliers do not open themselves for the reasons given above.
  • the pivot pin 39 rests on the lower end of the elongated hole 40.
  • the jaw 25 is tilted against the rear stop 26 in the direction of rotation, while the stop 27 is exposed.
  • the pliers are opened by pushing the levers 10 and 21 apart, which releases the self-clamping.
  • the jaw 25 tilts against the stop 27, so that the object 42 is not taken.
  • the toothing surfaces of the two opposing jaws must never come into contact with the pipe to be rotated at the same time, since the swiveling movement of the pliers on this pipe would then immediately come to a standstill due to blocking.
  • the distance between the stop 27 of the slider 29 and the corresponding counter surface of the jaw 25 is shown enlarged for reasons of clarity. These surfaces already press against each other when the jaw 25 is in the (unstable) middle position and the pliers levers are closed.
  • the slider 29 forms together with the Btöckieretement 31 a friction device which prevents the levers 10, 21 from being spread apart under the effect of the pressure of the object 42.
  • Fig. 2 the state is shown that the object 42 is rotated counterclockwise.
  • the levers 10 and 21 are pressed together in the direction of the arrows 43 so that the pliers close. Then a force is exerted on the lever 10 by hand in the direction of the arrow 44 '.
  • the jaw 25 tilts against the stop 27. To turn it back empty, the levers are pressed apart in the direction of the arrows 43 so that the lever 21 swings out slightly. This relieves the jaw 25. It pivots against the stop 26 and the attack surfaces 16 and 28 release the object 42.
  • the greater lowering and inclination of the jaw 25 means that the pliers can be moved more easily over the dead center of the pivoting movement around the edge of the screw head 42.
  • the elongated holes 38 and 40 give the jaw 25 enough freedom for the pivoting process. Without such freedom, there would be a risk of deadlocks.
  • Fig. 5 differs from that of Figs. 1-4 in that the inclined surface 33 and the blocking surface 32 are arranged at the lower end of the slider 29, while the blocking element 31 has a kink-free flat support surface 30 which with the Blocking surface 32 and the inclined sliding surface cooperates and extends parallel to the blocking surface 32.
  • the cross pin 46 has an elongated shape, so that the guide of the blocking element is guaranteed when the lever 21 is fully pivoted out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (9)

1. Clé à tubes comportant une première mâchoire (15) montée fixe sur un premier levier (10), un second levier (21) qui peut pivoter par rapport au premier levier et porte une seconde mâchoire (25) monté avec articulation, comportant aussi deux butées (26, 27) qui limitent le mouvement de pivotement de la seconde mâchoire (25) en direction du premier levier et en direction opposée, ainsi qu'un coulisseau (17) qui est relié au second levier (21) par l'intermédiaire d'une articulation (23) et qui peut se déplacer le long du premier levier (10) pour modifier la largeur de mors des mâchoires (15, 25), caractérisée en ce qu'au moins l'une des butées (27) est disposée contre un glissoir (29) qui peut être verrouillé en une position de travail par un organe de verrouillage (31) commandé par le mouvement du second levier (21) et qui, lorsque l'on fait pivoter le second levier (21) vers l'extérieur, permet le recul du glissoir (29).
2. Clé à tubes selon la revendication 1, caractérisée en ce que l'organe de verrouillage (31) est relié au second levier (21) par l'intermédiaire d'au moins un bras d'articulation (35).
3. Clé à tubes selon la revendication 1 ou 2, caractérisée en ce que l'organe de verrouillage (31) présente une surface de glissement oblique (33) à la suite d'une surface de verrouillage (32) qui est sensiblement dirigée parallèlement à la surface de butée (30) du glissoir (29).
4. Clé à tubes selon la revendication 1 ou 2, caractérisée en ce que le glissoir (29) présente une surface de glissement oblique (33) à la suite d'une surface de verrouillage (32) dirigée sensiblement parallèlement à la surface de butée (30) de l'organe de verrouillage (31).
5. Clé à tubes selon l'une des revendications 1 à 4, caractérisée en ce qu'une pièce de guidage (34) du coulisseau (17) guide l'organe de verrouillage (31) et l'appuie en sens contraire à la pression du glissoir (29).
6. Clé à tubes selon l'une des revendications 1 à 5, caractérisée en ce que l'articulation (23) présente une lumière (38) dirigée au moins approximativement en direction d'une seconde articulation (24) qui relie la seconde mâchoire (25) d'avec le second levier (21).
7. Clé à tubes selon l'une des revendications 1 à 6, caractérisée en ce qu'une seconde articulation (24), qui relie la seconde mâchoire (25) avec le second levier (21), présente une lumière (40) dirigée en direction de la seconde mâchoire (25).
8. Clé à tubes selon l'une des revendications 1 à 7, caractérisée en ce que dans une fente (20) du premier levier (10) sont guidés deux tétons (19, 22) dont le premier est relié au second levier (21) et l'autre au coulisseau (17).
9. Clé à tubes selon l'une des revendications 1 à 8, caractérisée en ce que les mâchoires (15, 25) présentent des surfaces de prise planes (16, 28) avec des dents à profil de dent symétrique.
EP85114748A 1984-12-07 1985-11-20 Clé à tubes Expired EP0184073B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843444725 DE3444725A1 (de) 1984-12-07 1984-12-07 Rohrzange
DE3444725 1984-12-07

Publications (3)

Publication Number Publication Date
EP0184073A2 EP0184073A2 (fr) 1986-06-11
EP0184073A3 EP0184073A3 (en) 1987-06-16
EP0184073B1 true EP0184073B1 (fr) 1989-08-02

Family

ID=6252190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114748A Expired EP0184073B1 (fr) 1984-12-07 1985-11-20 Clé à tubes

Country Status (4)

Country Link
US (1) US4616536A (fr)
EP (1) EP0184073B1 (fr)
DE (2) DE3444725A1 (fr)
ES (1) ES296294Y (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050464A (en) * 1988-10-14 1991-09-24 Encor Limited Multi-surface wrench
US6115898A (en) * 1995-06-06 2000-09-12 Btm Corporation Force multiplying apparatus for clamping a workpiece and forming a joint therein
US5853211A (en) * 1997-01-10 1998-12-29 Btm Corporation Universal gripper
TW201520009A (zh) * 2013-11-25 2015-06-01 yu-xiang Huang 管鉗結構
AU2014401943B2 (en) * 2014-07-29 2018-11-15 Sna Europe Industries Iberia, S.A. Pipe wrench
US20200171642A1 (en) * 2017-08-22 2020-06-04 Newman Products, Llc Multi-tool device
CN114074303B (zh) * 2020-08-18 2023-08-22 吴明杰 开***动扳手

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7824721U1 (de) * 1979-02-22 Dako Werkzeugfabriken David Kotthaus Gmbh & Co Kg, 5630 Remscheid Zweiseitig wirkende Rohrzange
GB217839A (en) * 1923-11-08 1924-06-26 Carl Gustav Bladh Improvements in pipe-wrenches
GB558251A (en) * 1942-09-10 1943-12-28 George Andrew Steele Improvements in or relating to work holding tools, wrenches and the like
US3141363A (en) * 1962-12-14 1964-07-21 Leon J Ferry Dual sliding jaw wrench
US3358533A (en) * 1966-09-06 1967-12-19 Wren Morris Lee Cam actuated sliding jaw wrench
DE2728454C3 (de) * 1977-06-24 1981-06-25 Fritz 6703 Limburghof Knebel Rohrzange

Also Published As

Publication number Publication date
US4616536A (en) 1986-10-14
DE3571951D1 (en) 1989-09-07
ES296294U (es) 1987-08-01
DE3444725A1 (de) 1986-06-12
ES296294Y (es) 1988-02-16
EP0184073A2 (fr) 1986-06-11
EP0184073A3 (en) 1987-06-16

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