US3401974A - Tongs for handling heavy products - Google Patents

Tongs for handling heavy products Download PDF

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Publication number
US3401974A
US3401974A US652511A US65251167A US3401974A US 3401974 A US3401974 A US 3401974A US 652511 A US652511 A US 652511A US 65251167 A US65251167 A US 65251167A US 3401974 A US3401974 A US 3401974A
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United States
Prior art keywords
tongs
jack
arms
jaws
articulated
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Expired - Lifetime
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US652511A
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English (en)
Inventor
Ghislain Antoine Jean Martelee
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Individual
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Individual
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    • 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
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/28—Duplicate, e.g. pivoted, members engaging the loads from two sides
    • B66C1/30—Duplicate, e.g. pivoted, members engaging the loads from two sides and also arranged to grip the sides of the loads

Definitions

  • This invention relates to tongs for handling heavy products which are inherently rigid such as in particular metal sheets in rolls or bundles or which are placed on a rigid support.
  • Rack-type tongs have a strong frame on which two arms with jaws slide under the action of a geared motor control system. With these tongs the clearance when in the closed position is determined by the width of the frame so that they can only be used where there exists between the rows of rolls, bundles or products to be handled, a distance greater than the said frame clearance. Furthermore with large size tongs the jaw arms are subject to considerable fiexional stresses causing friction which interferes with the sliding action, and the geared motor for opening the jaws is an expensive piece of equipment which necessitates an electric power supply by means of a cable placed on the winder.
  • the object of this invention which is intended to avoid the defects of known tongs, is to provide tongs for handling heavy products which are inherently rigid or are carried by a rigid support, which is characterized in that it has gripping jaws articulated to the ends of pairs of arms crossed scissors-wise whose other ends are respectively articulated to the piston rod of a principal hydraulic jack and to a mobile element on the said jack which is connected to a first pressure gas accumulator, the opening and closing of the arms and hence of the jaws being effected by means of an auxiliary jack the feed of which is controlled by a first electro-valve and comes from a second pressure gas accumulator likewise connected to Cal the principal jack and possibly to a tongs rotation jack passing via a second electro-valve.
  • the piston of the principal hydraulic jack is provided axially at one side with the rod to which the crossed arms are articulated and at the other side with a rod with grooves which fits in a socket with internal grooves driven by the rotation jack whose feed from the second gas accumulator is actuated by the second electro-valve.
  • each pair of crossed arms one arm is articulated to a fixed point of the corresponding jaw while the other arm is articulated to a slider moving in a slide member provided in a shank in extension of the said jaw.
  • auxiliary jack for controlling the jaws is fixed on one of the said jaws and engages the slider moving in the shank of the said jaw.
  • the crossed arms are of the same length and are articulated to one another at their middles; the mobile element on the principal jack is a collar sliding on the cylinder of the said principal jack.
  • the chamber 2a of the cylinder 2 of the principal jack 1 which is filled with oil is connected via a duct 20 to a first gas accumulator 15 divided into two chambers 15a and 15b by a flexible diaphragm the chamber 15a contains oil and 15b contains a gas under pressure.
  • a heavy product is suspended from the jaws 11 and 12 and when the assembly is pulled upwards on the hook 4, the piston 5 compresses the oil in the chambers 2a and 15a which powerfully compresses the gas in the chamber 15b.
  • the compressed gas in the chamber 15b expands and expels the oil from the chamber 15a. Then the piston 5 rises entraining with it the rod 7 so that the arms 8a, 9a, 8b,
  • a chamber 21 which is also filled with oil and which communicates on the one hand with an oil reservoir 16 via a duct 17 in which there is a non-return valve 17a and on the other hand with a chamber 180 of a second pressure gas accumulator 18, via a duct 19 in which there is a non-return valve 19a.
  • the oil in the accumulator 18 is placed under pressure by the nitrogen which is under heavy pressure in a chamber 18b behind a piston 18a-
  • a duct 20 leads from the duct 19 to a first electrovalve 21 at which there terminates a duct 22 going to the reservoir 16 which is under atmospheric pressure and ducts 23 and 24 respectively leading to the lower end and upper end of an auxiliary jack 25 controlling the opening and closing of the jaws 11 and 12.
  • the rod 25a of the piston of the auxiliary jack 25 is articulated by its upper end to the extended end of the arm 85 whose slider 14 moves in the slide 1211.
  • the electro-valve 21 is moved to the right against the action of a return spring 21a, the duct 20 is brought into communication with the duct 23 and the duct 24 with the duct 22 and the reservoir 16.
  • a telecontrol not shown
  • the electro-valve 21 is moved to the right against the action of a return spring 21a, the duct 20 is brought into communication with the duct 23 and the duct 24 with the duct 22 and the reservoir 16.
  • the angle of opening A of the arms 8b, 91] increases and the jaws 11 and 12 approach ing one another can grip between them a roll 31 placed horizontally, a pallet or a rigid bundle or any other rigid heavy product which can be raised.
  • the descent of the piston 5 causes the compression of the gas in the chamber b of the first accumulator 15 and the oil which is aspirated out of the reservoir 16, passing via 17a and 17, arrives in the chamber 21) above the said piston 5.
  • the valve 21 is actuated towards the left; thus the ducts and 24 are in communication and likewise 22 and 23 and the oil under pressure of the accumulator 18 acts via the ducts 20 and 24 on the upper surface of the piston of the auxiliary jack 2S, lowering the rod 25a and the slider 14.
  • the angle A decreases and the jaws 11 and 12 spread apart, releasing the roll and the cycle of operations can begin again without it being necessary to supply any other feed of power to the tongs than that of the gas accumulators I which accumulate energy during some phases and give it up during others.
  • the electro-valve 28 moves either to the right or to the left, against the action of a return spring 28a so that the oil under pressure coming from the chamber 180 of the accumulator 18, feeds via one or other of the ducts 30a, 3017, the rotary jack 27 which thus rotates in one direction or the other and likewise causes to rotate the socket 26, the driving rod 6, the piston 5, the rod 7 and, consequently, the crossed arms of the jaws of the tongs and the collar 10.
  • the tongs described have advantages of great importance. First of all it is automatic and removable and can be placed on various different hooks. Then, seeing that it operates with its own independent source of power, it has no connection with any outside source of energy. Furthermore, its construction and source of en rgy lend themselves very easily to telecontrol by radio-electric sig nals.
  • Tongs for handling heavy products, inherently rigid or carried by a rigid support, such as rolls of metal sheets or bundles of metal sheets, comprising jaws which can be spread apart or brought together, two pairs of arms crossed scissors-wise, a principal hydraulic jack, a piston in said principal hydraulic jack, a rod rigid with said piston, a mobile element on said principal hydraulic jack, said jaws being articulated to the ends of said arms, said arms being articulated respectively to said rod and to said mobile element, a first pressure gas accumulator, a connection between said first gas accumulator and said principal hydraulic jack, an auxiliary jack for the opening and closing of said arms which spread apart and bring together said jaws, a second pressure gas accumulator, a connection between said second gas accumulator and said principal jack, a rotation jack for rotating the tongs, a connection between said second gas accumulator and said auxiliary jack, a first electro-valve on said connection between said second gas accumulator and said auxiliary jack, a connection between said second gas accumul
  • Handling tongs as claimed in claim 1 characterized in that said crossed arms are of equal length and are articulated to one another at their middles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Load-Engaging Elements For Cranes (AREA)
US652511A 1966-08-19 1967-07-11 Tongs for handling heavy products Expired - Lifetime US3401974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE685783 1966-08-19

Publications (1)

Publication Number Publication Date
US3401974A true US3401974A (en) 1968-09-17

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ID=3849247

Family Applications (1)

Application Number Title Priority Date Filing Date
US652511A Expired - Lifetime US3401974A (en) 1966-08-19 1967-07-11 Tongs for handling heavy products

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US (1) US3401974A (ja)
BE (1) BE685783A (ja)
GB (1) GB1157355A (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647255A (en) * 1969-11-14 1972-03-07 Gordon H Hale Remote-controlled grapple
US3957233A (en) * 1975-07-21 1976-05-18 United Technologies Corporation Fluidically controlled cargo hook controlled system
US3957234A (en) * 1975-07-21 1976-05-18 United Technologies Corporation Fluidically controlled cargo hook controlled system
FR2390363A1 (fr) * 1977-05-09 1978-12-08 Lombardo Pierre Benne preneuse a deux machoires radio-guide
US5893700A (en) * 1996-03-13 1999-04-13 Kronseder; Hermann Transport star for containers
US6056341A (en) * 1998-01-16 2000-05-02 Diamond Automations, Inc. Apparatus for releasing items within a confined space
US20050129496A1 (en) * 2003-03-28 2005-06-16 Integrated Dynamics Engineering Gmbh Fast swapping station for wafer transport
CN116986462A (zh) * 2023-09-22 2023-11-03 河南科技学院 一种棒材类工件起重机专用吊具
CN118373316A (zh) * 2024-06-24 2024-07-23 江苏新西贝机电有限公司 一种带有c型钩的港口码头卷材周转用吊装装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU55825A1 (ja) * 1967-05-31 1968-06-28
CN110092143A (zh) * 2019-05-21 2019-08-06 中国矿业大学(北京) 一种高度可调的煤矿用带式输送机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310335A (en) * 1965-10-13 1967-03-21 Neil E Shuey Load lifting mechanism
US3312496A (en) * 1965-09-14 1967-04-04 Boutelle Albert Underwater manipulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312496A (en) * 1965-09-14 1967-04-04 Boutelle Albert Underwater manipulator
US3310335A (en) * 1965-10-13 1967-03-21 Neil E Shuey Load lifting mechanism

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647255A (en) * 1969-11-14 1972-03-07 Gordon H Hale Remote-controlled grapple
US3957233A (en) * 1975-07-21 1976-05-18 United Technologies Corporation Fluidically controlled cargo hook controlled system
US3957234A (en) * 1975-07-21 1976-05-18 United Technologies Corporation Fluidically controlled cargo hook controlled system
FR2390363A1 (fr) * 1977-05-09 1978-12-08 Lombardo Pierre Benne preneuse a deux machoires radio-guide
US5893700A (en) * 1996-03-13 1999-04-13 Kronseder; Hermann Transport star for containers
US6056341A (en) * 1998-01-16 2000-05-02 Diamond Automations, Inc. Apparatus for releasing items within a confined space
US20050129496A1 (en) * 2003-03-28 2005-06-16 Integrated Dynamics Engineering Gmbh Fast swapping station for wafer transport
US7234913B2 (en) * 2003-03-28 2007-06-26 Integrated Dynamics Engineering Gmbh Fast swapping station for wafer transport
CN116986462A (zh) * 2023-09-22 2023-11-03 河南科技学院 一种棒材类工件起重机专用吊具
CN116986462B (zh) * 2023-09-22 2024-01-19 河南科技学院 一种棒材类工件起重机专用吊具
CN118373316A (zh) * 2024-06-24 2024-07-23 江苏新西贝机电有限公司 一种带有c型钩的港口码头卷材周转用吊装装置

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Publication number Publication date
BE685783A (ja) 1967-02-01
GB1157355A (en) 1969-07-09

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