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EP0038037B1 - Dispositif de préhension pour tuyaux - Google Patents

Dispositif de préhension pour tuyaux Download PDF

Info

Publication number
EP0038037B1
EP0038037B1 EP81102717A EP81102717A EP0038037B1 EP 0038037 B1 EP0038037 B1 EP 0038037B1 EP 81102717 A EP81102717 A EP 81102717A EP 81102717 A EP81102717 A EP 81102717A EP 0038037 B1 EP0038037 B1 EP 0038037B1
Authority
EP
European Patent Office
Prior art keywords
gripping
axis
swivelling
abutment
claw
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
EP81102717A
Other languages
German (de)
English (en)
Other versions
EP0038037A3 (en
EP0038037A2 (fr
Inventor
Josef Emunds
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.)
EMUNDS, JOSEF
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT81102717T priority Critical patent/ATE13656T1/de
Publication of EP0038037A2 publication Critical patent/EP0038037A2/fr
Publication of EP0038037A3 publication Critical patent/EP0038037A3/de
Application granted granted Critical
Publication of EP0038037B1 publication Critical patent/EP0038037B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/422—Gripping members engaging only the external or internal surfaces of the articles actuated by lifting force

Definitions

  • the invention relates to a gripping device for pipes with two scissor-like crossing arms that are pivotally hinged to one another, on the free ends of which two gripping rails are attached that run parallel to the swiveling axis of the gripping arms, each of which has at least two spaced-apart pipes to be lifted have laterally gripping jaws which are pivotally attached to the gripping rails about axes running parallel to the pivot axis of the gripping arms and are held in a gripping position by a spring which is supported against an abutment surface of the gripping jaw.
  • a gripping device of this type is known from brochures from Emunds & Staudinger GmbH & Co. KG.
  • the spring which presses the gripping jaw into the gripping position, in which, when unloaded, the lower gripping area protrudes further inwards towards the pipe to be received than the upper gripping area, has to absorb large loads with relatively small spring travel.
  • the object of the invention is to design the suspension of the gripping jaws so that it is reliable, takes up little space and has a strongly increasing spring stiffness under load.
  • the back of the gripping jaw is curved around at least one axis parallel to the pivot axis, the distance from a parallel to the pivot axis abutment surface is greater than the distance of the pivot axis from the abutment surface and that between this and the curved rear the gripping jaw is arranged in a strand-like, rubber-elastic, prestressed body.
  • the elastic body presses the gripper jaw into the gripping position. If the gripping device is brought over a pipe to be picked up and the gripping arms close, then the gripping area below the pivot axis of the gripping jaw first contacts the pipe wall. The gripping jaw is pivoted so far against the action of the resilient body that its upper gripping area also bears against the tube wall.
  • the curved rear of the gripping jaw presses against the strand-shaped, rubber-elastic body and at the same time takes it into the narrowing gap between the curved rear of the gripping jaw and the abutment surface. This compressing the rubber-elastic body increases its rigidity.
  • the gripping rail consists of a U-profile, in which the gripping jaws are mounted so that the abutment surface is formed by the inside of the web of the U-profile and the strand-shaped rubber-elastic body when the gripping jaw is not loaded is at an angle of U profile is located.
  • a downwardly projecting stop on the gripping jaw which serves as a resilient deflector and facilitates gripping over the gripping device.
  • the stop on the gripping jaws has the task of putting the pipe gripper over a pipe to be picked up without difficulty and thereby protecting the gripping elements, in particular the metallic gripping tips, against abrasion.
  • the gripping device for pipes shown in FIG. 1 has two gripping arms 1 and 2 which intersect like scissors and which are pivoted to one another about the axis 3. At the upper ends of the gripping arms 1 and 2, tabs 4 and 5 are articulated, which are articulated to an eyelet 6. The eyelet 6 is used to hang the gripping device on a rope or chain sling. Between the joint that connects the two brackets 4 and 5, and the pivot axis 3 of the gripping arms 1 and 2, a tension spring (not shown) is arranged on the one hand and on the other hand a locking device 7 which holds the two gripping arms 1 and 2 in the open position after a tube has been set down, until the gripping device with the adjustable stop 8 is placed on a new pipe to be picked up.
  • a tension spring (not shown) is arranged on the one hand and on the other hand a locking device 7 which holds the two gripping arms 1 and 2 in the open position after a tube has been set down, until the gripping device with the adjustable stop 8 is placed on a new pipe
  • gripping rails 9 and 10 are arranged, which run parallel to the pivot axis 3.
  • the gripping rails 9 and 10 are formed by U-profiles.
  • a gripping jaw 11 is arranged, which is relative to one another. Small angle is pivotally attached to an axis 12 extending parallel to the pivot axis 3 of the gripping arms 1 and 2.
  • the gripping jaws 11 are held by springs in a position corresponding approximately to the gripping position. In this position, the mutually facing surfaces of the opposing gripping jaws 11 diverge from below to above.
  • the outwardly resilient stop 16 has the effect that the gripping device slides over a pipe without difficulty, although when the gripping device is lowered the two gripping rails are not aligned parallel to the pipe to be received.
  • the stops 16 striking the pipe to be accommodated automatically bring the two parallel gripping rails 9 and 10 into a position in which they run parallel to the axis of the pipe to be accommodated.
  • the stops 16 also prevent the gripping teeth of the gripping jaws from being excessively worn.
  • the locking device 7 unlocks, so that the gripping arms 1, 2 can be closed and the gripping jaws 11 lie against the pipe wall below the pipe center.
  • the gripping jaws 11 are pivotally mounted in walls 27 which are welded into the gripping rails 9, 10 at right angles to the pivot axis 3 of the gripping jaws 1, 2.
  • the free edges of the flanges of the gripping rails 9, 10 formed from a U-profile serve as lower stops 13 and upper stops 24 of the gripping jaws 11.
  • the gripping jaws 11 are equipped with gripping elements 14, 15, which are each composed of a series of gripping teeth 17 which are incorporated into the gripping jaw 11.
  • Fig. 3 shows a view along the section line 111-111 in Fig. 2, but in which the gripping jaw 11 with its gripping elements 14, 15 bears against the dash-dotted wall 30 of a pipe to be received and the gripping jaw 11 is pivoted slightly downward.
  • the gripping jaw 11 is under the action of a rubber-elastic, resilient, strand-like body 25, which can have a round cross section and is arranged between an abutment surface 31 and the curved rear side 32 of the gripping jaw 11 and extends over the width of the gripping jaw 11.
  • the radius of curvature of the curvature of the rear side 32 is approximately twice as large as the distance between the pivot axis 12 and the abutment surface 31.
  • the starting position of the gripping jaw 11 and the rubber-elastic body 25 is also shown in dash-dot lines. In this unloaded position, the gripping jaw 11 is pressed by the resilient body 25 against the upper stop 24.
  • the cross section of the resilient body 25 is round.
  • This rubber body 25 is - as shown in dash-dotted lines - used with bias so that it is in the lower angle between the web and the lower flange of the U-shaped rail 10.
  • the elastic body 25 is carried along by the curved rear side 32 of the gripping jaw 11 and squeezed into the narrowing gap between the rear side 32 and the abutment surface 31.
  • the gripping jaw 11 which is made in one piece from cast steel, which is provided with two rows of gripping tips 17 in the lower gripping area 14 and with a row of gripping tips 17 in the upper gripping area 15, and the rear side 32 of which is curved, there is a wide range of widths the gripping jaw 11 extending downward projecting stop 16 is attached, which abuts a concrete pipe to be gripped before the gripping device with its gripping jaws 11 is in the correct gripping position. So that the gripping device can slide better over the pipe to be gripped, rollers 35 can be arranged at the free end of the stop 16 about an axis 34 running parallel to the pivot axis 12.
  • This arrangement of the stop 16 serving as a deflector on the gripping jaw 11 has the advantage that no special suspension is required for the stop 16 and that when a worn gripping jaw 11 is replaced, the stop 16, which is exposed to heavy wear, is also replaced.
  • the gripping jaw 11 has between the gripping teeth 17 of the upper gripping area 14 and the lower gripping area 15 a semi-cylindrical recess 36 into which an insert 37 made of rubber-elastic material, e.g. B. rubber, and can be fastened by means of screws 38.
  • the gripping jaws 11 of the pipe gripper are equipped with these inserts 37 when pipes with a smooth surface are to be gripped.
  • the insert 37 has an essentially planar lower gripping area 14 and an upper gripping area 15 which lies against the tube wall.
  • the planes of these gripping areas 14 and 15 are at an angle of, for example, 170 ° or 180 ° to one another.
  • the semi-cylindrical recess 36 is arranged in such a way that the tooth tips of the gripping teeth 17 are created with its help.
  • the lower row of tooth tips 17 holds a tube even if the inserts 37 made of elastic material should be badly worn.
  • each gripper jaw For easy and safe gripping of a pipe, it is advantageous if each gripper jaw
  • a gripper jaw 11 is divided into at least one plane perpendicular to the pivot axis 12. If a gripper jaw 11 is subdivided into two or three, then two or three elements can be pivoted independently about the axis 12, which elements can also properly fit against a pipe to be gripped when the pipe wall is inclined to the swivel axis 12 of the gripper jaw parts. When a tube lying at an angle or inclined is removed, the gripper jaw parts compress the strand-like, rubber-elastic body 25 to different degrees.
  • the pivot axis 12 in diameter considerably, for example 10-30%, smaller than the bore 40 surrounding the pivot axis 12 in the gripping jaw 11.
  • the bore 40 is arranged and the play between the pivot axis 12 and the bore 40 is so great that the gripping jaw 11 is supported with the curved rear side 32 against the abutment surface 31 and at the same time against the lower flange of the U-rail 10 when the gripping jaw 11 is loaded.
  • the gripping jaw 13 In the unloaded state, the gripping jaw 13, as shown, is pressed obliquely upwards against the pivot axis 12 by the prestressed, resilient body 25.
  • the gripping surface of the elastic insert 37 for forming the lower gripping area 14 and the upper gripping area 15 is composed of two planes inclined at a relatively small angle to one another.
  • the gripping surface of the elastic insert 37 can, however, also be flat overall, because when a pipe is gripped, the curved outer surface of which is pressed into the initially flat gripping surface of the elastic insert 37.
  • the rubber-elastic body 25 is arranged between the lower corner of the U-shaped gripping rail 10 and the curved rear side 32 of the gripping jaw 11.
  • a second rubber-elastic body 25 in the upper corner of the U-shaped gripping rail 10.
  • the described gripping device has the advantage that it can be assembled very easily and quickly. It is only necessary to pull out the pivot axis 12 in order to replace the gripping jaw 11 and its resilient body 25. Because the curved surface 32 rolls off the prestressed, strand-like elastic body 25 without sliding movement, the gripping jaw 11 is always returned to the same starting position by the resilient body 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Tyre Moulding (AREA)

Claims (8)

1. Dispositif de serrage pour tuyaux avec deux bras de serrage entrecroisées, forme ciseaux, articulés ensemble et pivotant autour d'un axe aux extrémités duquel sont attachées deux barres de serrage qui sont parallèles à l'axe pivotant des bras de serrage, ces barres possédant chacune un minimum de deux morchades de serrage positionnées à une certaines distance l'une de l'autre et serrant les tuyaux à soulever latéralement par le dessous, qui sont attachées aux barres de serrage et maintenues dans une position de serrage par un ressort de sorte qu'elles pivotent autour des axes parallèles à l'axe pivotant, ce ressort étant supporté contre une surface de butée de la barre de serrage, caractérisé par le fait que le dos (32) de la mordache de serrage (11) est arquée sur au moins un axe positionné parallèle à l'axe pivotant, la distance du premier à partir d'une surface de butée (31) parallèle à l'axe pivotant (12) étant supérieure à la distance de l'axe pivotant (12) à partir de la surface de butée (31), et par le fait qu'entre ceci et le dos arqué (32) de la mordache de serrage (11) se trouve un élément pré-tenu caoutchouc-élastique, en forme de corde, qui sert de ressort.
2. Dispositif de serrage selon la revendication 1, caractérisé par le fait que les barres de serrage (9, 10) sont des profiles en U à l'intérieur desquels les mordaches de serrage (11) trouvent un support pivotant, de sorte que le côté intérieur de l'âme du profile en U sert de surface de butée à l'élément ressort (25).
3. Dispositif de serrage selon la revendication 1 ou 2, caractérisé par le fait que le rayon de courbure du dos arqué (32) est approximativement deux fois la distance de l'axe pivotant (12) à partir de la surface de butée (31).
4. Dispositif de serrage selon la revendication 3, caractérisé par le fait que le trou (40) prévu dans la mordache de serrage (11) entourant l'axe pivotant (12) englobe l'axe pivotant (12) permettant ainsi un tel degré de jeu que la mordache de serrage (11), une fois chargée, peut s'appuyer contre la surface de butée (31) et la bride inférieure de la barre de serrage (10) dans toutes les positions pivotantes.
5. Dispositif de serrage selon l'une des revendications 1 à 4, caractérisé par le fait que l'élément ressort (25) est de type à profil en travers circulaire et s'étend essentiellement sur la largeur de la mordache de serrage (11).
6. Dispositif de serrage selon l'une des revendications 1 à 5, caractérisé par le fait que la mordache de serrage (11) est prévue avec des éléments de serrage inférieur et supérieur (14, 15) conçus comme des dents de serrage (17), et qu'elle est fabriquée en acier coulé intégral.
7. Dispositif de serrage selon la revendication 6, caractérisé par le fait qu'un retrait semi-cylindrique approximativement (36) est prévu entre les dents de serrage (17) des éléments de serrage inférieur et supérieur (14, 15) pour accepter une pièce rapporte (37) en caoutchouc élastique pour serrer les tuyaux lissés.
8. Dispositif de serrage selon les revendications 1 à 7, caractérisé par le fait que la mordache de serrage (11) est divisé au moins sur un plan disposé à angles droits par rapport à l'axe pivotant (12).
EP81102717A 1980-04-12 1981-04-10 Dispositif de préhension pour tuyaux Expired EP0038037B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102717T ATE13656T1 (de) 1980-04-12 1981-04-10 Greifvorrichtung fuer rohre.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803014146 DE3014146A1 (de) 1980-04-12 1980-04-12 Greifvorrichtung fuer rohre
DE3014146 1980-04-12

Publications (3)

Publication Number Publication Date
EP0038037A2 EP0038037A2 (fr) 1981-10-21
EP0038037A3 EP0038037A3 (en) 1982-01-13
EP0038037B1 true EP0038037B1 (fr) 1985-06-05

Family

ID=6099877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102717A Expired EP0038037B1 (fr) 1980-04-12 1981-04-10 Dispositif de préhension pour tuyaux

Country Status (3)

Country Link
EP (1) EP0038037B1 (fr)
AT (1) ATE13656T1 (fr)
DE (2) DE3014146A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58144577U (ja) * 1982-03-19 1983-09-29 新和機械工業株式会社 管掴み機
GB2175038A (en) * 1985-02-27 1986-11-19 Drg Uk Ltd Coupling means
IT1211602B (it) * 1987-12-15 1989-11-03 Prima Ind Spa Dispositivo manipolatore robotizzato particolarmente per lamiere avente organi di presa automatica mente intercambiabili
JP3075248B2 (ja) 1998-01-19 2000-08-14 日本電気株式会社 非同期転送モードスイッチ

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927704A (en) * 1960-03-08 Hydraulic device
GB100550A (en) * 1911-05-24 1916-06-08 Saint Gobain Improvements in Gripping Appliances Suitable for Lifting Cylindrical Articles.
FR433383A (fr) * 1911-08-18 1912-01-05 The Yale & Towne Manufacturing C Perfectionnements apportés aux grappins
FR552139A (fr) * 1921-10-04 1923-04-24 Mâchoires pour pince à serrage automatique
US2497600A (en) * 1945-05-21 1950-02-14 William M Grigsby Hoist device
DE1117280B (de) * 1959-02-05 1961-11-16 Peter Moskopf Vielfachgreifer zum Stapeln, Arken und Verladen von Deckensteinen, Platten od. dgl.
FR1218128A (fr) * 1959-02-28 1960-05-09 Pince à galets
US3061357A (en) * 1959-06-05 1962-10-30 Nat Steel Corp Lifting apparatus
DE1921959B2 (de) * 1969-04-30 1974-04-18 Fried. Krupp Gmbh, 4300 Essen Traversen-Geschirr zum Transport von Brammen oder dergl
DE1937281A1 (de) * 1969-07-23 1971-02-04 Hermann Steinweg Kg Baumaschin Einseitig wirkender Krangreifer fuer Steinpakete des Bauwesens
DE2722689C2 (de) * 1977-05-18 1983-02-03 Alfred Ing.(grad.) 8160 Miesbach Kinshofer Auf eine Greifzange unrüstbarer Zweischalengreifer
DE2901808A1 (de) * 1979-01-18 1980-07-31 Oldenburger Betonsteinwerke Greifer zum lagenweisen verlegen von zu scheibenfoermigen verlegeeinheiten zusammengefassten pflastersteinen
DE2936990A1 (de) * 1979-09-13 1981-04-02 Josef Ing.(grad.) 5142 Hückelhoven Emunds Greifvorrichtung fuer rohre

Also Published As

Publication number Publication date
EP0038037A3 (en) 1982-01-13
ATE13656T1 (de) 1985-06-15
DE3014146A1 (de) 1981-10-15
DE3170815D1 (en) 1985-07-11
EP0038037A2 (fr) 1981-10-21

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