US3805978A - Transport apparatus - Google Patents

Transport apparatus Download PDF

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Publication number
US3805978A
US3805978A US00321402A US32140273A US3805978A US 3805978 A US3805978 A US 3805978A US 00321402 A US00321402 A US 00321402A US 32140273 A US32140273 A US 32140273A US 3805978 A US3805978 A US 3805978A
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Prior art keywords
magnet
magnet beam
lifting
transport apparatus
sheet
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Expired - Lifetime
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US00321402A
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English (en)
Inventor
G Hahne
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MAGNEMAG HAGOU AS
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H Nielsen and Son Maskinfabrik AS
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Assigned to MAGNEMAG HAGOU A/S, reassignment MAGNEMAG HAGOU A/S, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: H. NIELSEN & SON MASKINFABRIK A/S
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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
    • B66C1/04—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 magnetic means
    • B66C1/06—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 magnetic means electromagnetic

Definitions

  • ABSTRACT Automatic transport apparatus especially a gantry
  • Foreign Application Priority Data crane provided with a magnet beam for lifting and Jun. 6, 1972
  • Great Britain 712/72 transporting steel Sheets in a Sheet stack' From the magnet beam :1 series of inter-spaced magnet beam
  • US. Cl. 214/85 D, 214/] BT, 214/658, tiOns is suspended, the sections being situated in an 294/655 oblique plan forming an angle to the surface of the 1511 1111.01.
  • the transport apparatus is 5 Field of Search n 214 5 D, 1 BS 1 BTy able to lift the topmost sheet Of a stack Of sheets COD- 214/658; 294/655 taining large sheets of various lengths, widths, and thicknesses.
  • Each section has an oblong magnet which [56] References Cited is pivotally journalled around a horizontal axis and is UNITED STATES PATENTS capable of activating a micro-switch.
  • the invention relates to a transport apparatus, especially a gantry crane, provided with a magnet beam for lifting and transporting sheets of magnetizable material, especially steel sheets, which magnet beam has a girder and at least one from the girder by means of wires suspended magnet beam section, which has a frame with a front and a rear transverse frame part and two sidegoing frame parts, and one or more electro magnets mounted in the frame.
  • a transport apparatus a so-called captivator is known in the form of a wagon with a conveyor and a magnet beam of the above-mentioned kind, arranged to be capable of lifting single sheets from a stack of sheets. Such lifting of single sheets is needed in shipbuilding yards, rolling mills and other undertakings where sheets are processed.
  • Such a transport apparatus with a magnet beam is to be designed in such a way that the carrying capacity of its lifting magnet device may be adjusted to the thickness of the sheets as this carrying capacity is partly to be sufficiently strong for attaching the thickest sheet in the stack, partly so poor that it does not attract two sheets lying on top of each other simultaneously.
  • the abovementioned captivator has two substantial drawbacks. First it is not capable of lifting all sheets, especially not short thick and long thick sheets. Secondly the captivator operates relatively slowly since first it has to pull the sheets up on its conveyor.
  • the purpose of the invention is to provide a transport apparatus, especially in the form of a gantry crane, which automatically and safely is capable of lifting the topmost sheet of a stack of sheets containing large sheets of various lengths, widths and thicknesses.
  • the transport apparatus is characteristic in that the magnet beam has a series of interspaced magnet beam sections, the sidegoing frame parts of which are situated in the same plane forming an angle to the surface of the sheets in the sheet stack.
  • the transport apparatus will transport the sheet towards the desired spot, where the sheet will be laid down by a lowering movement of the magnet beam.
  • the transport apparatus is characteristic in that the girder is suspended from the transport apparatus in a substantially horizontal position, and that the magnet beam sections are suspended from the girder by means of wires of various lengths so that the sidegoing frame parts of the magnet beam sections are placed in the same plane forming an angle to the girder.
  • an oblique suspension of the magnet beam is obtained in a simple manner so that the sidegoing frame parts of the magnet beam sections form an angle to the surface of the sheets of the sheet stack without the girder being turned in advance from a horizontal to an oblique position.
  • the transport apparatus according to the invention is characteristic in that the girder is suspended from the transport apparatus in a substantially horizontal position and can be turned in relation to this position, and that the magnet beam sections are suspended from the girder by means of wires of the same lengths so that the sidegoing frame parts of the magnet beam sections are placed in the same plane.
  • the girder is suspended from the transport apparatus in a substantially horizontal position and can be turned in relation to this position, and that the magnet beam sections are suspended from the girder by means of wires of the same lengths so that the sidegoing frame parts of the magnet beam sections are placed in the same plane.
  • a simple suspension of the magnet beam sections from the girder is obtained by using wires of the same lengths for the suspension.
  • the transport apparatus according to the invention is characteristic in that the electro magnets of the magnet beam sections are magnets of the reversible type (cf. British Pat. No. 1,187,557).
  • the use of such reversible type magnets has the advantage that they can be switched over between two positions, i.e. a first position with the magnets having a maximum carrying capacity, which means that the magnets are capable of carrying a heavy sheet, and another position with the magnets having a small carrying capacity.
  • the transport apparatus is characteristic in that the row of magnet beam sections consists of a front magnet beam section, placed at that end of the girder situated at the greatest distance from the topmost sheet of the sheet stack, and a number of lifting magnet beam sections lying there behind, that the frame of the front magnet beam section is suspended. just as the lifting operation begins. from two carrying wires, one carrying wire being fixed to each side of the center of the frame. that one of the carrying wires has a weight indicator built into it, and that the electro magnets of the front magnet beam section can lift at least half of the actual load.
  • each lifting magnet beam section has along its rear frame part an oblong plate magnet which preferably is designed as an oblong reversible-type plate magnet. If, for instance thin sheets are to be lifted, i.e., thin sheets of a thickness of about 3-4 millimetres, an ordinary oblong plate magnet may unintentionally be turned by the underlying sheets because of its large depth effect. If, on the other hand an oblong reversible-type plate magnet is used, made according to the same principle as the round reversibletype magnets described in the previously mentioned British Pat. specification No.
  • the advantage is achieved that the tractive force of the plate magnet is concentrated upon the top part of the topmost sheet of the sheet stack when the hoisting movement is started.
  • the plate magnet is to be currentcontrolled in such a way that after the hoisting movement having been started, the plate magnet is automatically switched from the position where the tractive force is concentrated upon the topmost sheet to a position where the plate magnet has maximum tractive force.
  • each lifting magnet beam section is pivotally journalled around a horizontal axis, which is parallel to the front or rear frame part.
  • a horizontal axis which is parallel to the front or rear frame part.
  • each lifting magnet beam section is provided with a measuring means so arranged that when the magnet of a lifting magnet beam section during the lifting of the magnet beam is turned an angle in relation to the sidegoing frame part of the lifting magnet beam section, which angle is equal to the angle, which the sidegoing frame parts of the lifting magnet beam sections in their normal suspension position form with the surface of the sheets in the sheet stack, then the measuring means concerned will switch-off the current to the magnet of the lifting magnet beam section concerned, and to all the magnets of the behindlying lifting magnet beam sections.
  • the current will be switched-off to the magnet of the frontmost of those lifting magnet beam sections, the magnet of which is turned to an angle in relation to the frame of the lifting magnet beam section, which angle is equal to the angle formed by the sidegoing frame parts of the magnet beam section in their normal suspension position to the surface of the sheet stack; and besides the current will be switched-off to all the magnets of the lifting magnet beam sections positioned behind, whereby the switched-off lifting magnet beam sections no longer will engage the underlying sheets during the further lifting of the magnet beam.
  • the measuring means is a microswitch attached on the rear frame part magnet positioned behind the rear edge of the sheet to be lifted, and which besides can switch-off the current to all the magnets of the lifting magnet beam sections positioned behind the first mentioned magnet.
  • an essential feature of the transport apparatus according to the invention is that the magnet beam sections are inter-connected by means of movable, mechanical coupling links.
  • the individual magnet beam sections are capable of performing the requisite movement mutually during the lifting of a sheet.
  • each coupling link consists of hinge plates attached on opposite frame parts of adjacent magnet beam sections, and of hinge pins extending transversely through eyes in the hinge plates.
  • FIG. 1 shows in perspective an embodiment of a transport apparatus according to the invention in the form of a gantry crane with a magnet beam suspended in an oblique plane and consisting of a number of magnet beam sections, the coupling links between the sections being deleted for sake of clarity, I
  • FIG. 2 on a larger scale and viewed from above the front magnet beam section and a fragment of the magnet beam section lying behind according to FIG. 6, the front magnet beam section being imaginably lowered down on the sheet stack,
  • FIG. 3 diagrammaticly on a smaller scale and viewed from the side the transport apparatus in FIG. l,
  • FIG. 4 diagrammaticly on a smaller scale and viewed from the side another embodiment of the transport apparatus in FIG. 1, the magnet beam being situated in a horizontal position,
  • FIG. 5 the same, the magnet beam being turned an angle
  • FIG. 6 diagrammaticly on a larger scale and viewed from the side a fragment of an amended embodiment of the magnet beam shown in FIG. 1 at an initial stage of the hoisting movement of the magnet beam, the front magnet beam section of the magnet beam lifting up a short sheet,
  • FIG. 7 the magnet beam shown in FIG. 6 at a later moment when the sheet is lifted free of the sheet stack
  • FIG. 8 the magnet beam shown in FIG. 6 during the lifting of a longer sheet
  • FIG. 9 the magnet beam shown in FIG. 6 during the lifting of a long sheet.
  • FIG. 1 shows a transport apparatus in the form of a gantry crane consisting of two portals 57 and 58, a girder 59, combining the two portals, and a magnet beam 60, the girder 62 of which is suspended from the girder 59 by means of wires 61.
  • the portals 57 and 58 have at the foot travelling wheels (not shown), which, in relation to the longitudinal direction of the girder 62, can run on longitudinal or athwart rails (not shown).
  • the gantry crane has run over a sheet stack 73, consisting of a number of steel sheets, the lengths, widths and thicknesses of which may vary.
  • the magnet beam 60 consists of a traverse or girder 62 and a series of interspaced magnet beam sections 63, 64, 65, 66, 67, 68, 69, and 70, which by means of wires 97 are suspended from the girder 62.
  • each magnet beam section 63, 64 has a frame 1 which consists of a front transverse frame part 2, a rear transverse frame part 3 and two sidegoing frame parts 4 and 5, which frame parts 2-5 can e.g. be U-shaped sectional irons.
  • the wires 97 of the magnet beam sections 63 70 are of various lengths, so that the sidegoing frame parts 4, 5 of the magnet beam sections are placed in the same plane forming an angle 7 with the girder 62 said girder 62 being suspended from the girder 59 of the gantry crane in a substantially horizontal position. Since the girder 62 is parallel to the sheet stack 73. said angle is equal to the suspension angle beta. i.e.. the angle which is formed by the side-going frame parts 4, 5 of the magnet beam sections 63-70 in their suspension position to the surface of the sheets in the sheet stack 73.
  • wires 97 of various lengths as shown in FIG. 1 an oblique suspension of the magnet beam sections 63-70 is obtained without it being necessary to turn the girder 62.
  • FIG. 4 another embodiment of the transport apparatus is shown which, e.g., as shown may be formed as a gantry crane.
  • the girder 62 is suspended from the girder 59 of the gantry crane and is in FIG. 4 in a horizontal position.
  • the girder 62 in FIG. 4 may turn in relation to its horizontal position, one end of the girder 62 is lifted or lowered in relation to the other end.
  • This lifting or lowering can, e.g., be carried out by two hoisting machineries (not shown), which are mounted on the girder 59 andwhich can operate independently.
  • the magnet beam sections 63-70 are suspended from the girder 62 by means of wires 97 of the same length, so that the side-going frame parts 4 of the magnet beam sections 63-70 are in the same plane.
  • the girder 62 is turned from its normal non-operative position to the turned working-position shown in FIG. 5 by means of the hoisting machineries.
  • the girder 62 is lowered down on the surface of the sheet stack 73 and lifting of the topmost sheet can be started.
  • the angle )3 which the side-going frame parts 4, 5 of the magnet beam sections form with the surface of the sheet stack 73 can be adjusted to a desired value.
  • the suspension angle B may thus be varied in contradiction to the embodiment in FIG. 3 where the suspension angle 5 has a fixed value.
  • the series of magnet beam sections 63-70 consists of a front magnet beam section 63 and a number of lifting magnet beam sections 64-70 lying behind.
  • the front magnet beam section 63 is placed at the end of the girder 62 situated at the greatest distance from the topmost sheet 78 in the sheet stack 73.
  • the individual magnet beam sections 6370 have expediently a width, which is smaller than the width of the narrowst sheet in the sheet stack 73.
  • FIG. 6 a fragment of the magnet beam 60 of FIG. 1 is shown diagrammaticly, viewed from the side during the lifting of a short sheet 78.
  • the magnet beam section 63 shown in FIG. 1, 2 and 6 has an oblong plate-magnet 15 at its front end and an oblong plate-magnet 21 at its rear end.
  • the platemagnets 15 and 21 can, e.g., each be replaced by one series of circular magnets of the reversible type as described in the previously mentioned British Pat. specification No. 1,187,557, e.g., three magnets in each series.
  • the rearmost magnet 21 is pivotally journalled around a horizontal axis 114 going through the center point of the topside of the magnet 21.
  • one or several circular or oblong magnets may be mounted so that the electro magnets of the front magnet beam section 63 can lift at least half of the actual load, i.e., the heaviest sheet which is to be lifted by the transport apparatus, and half of the lifting magnet beam sections lying behind.
  • Each of the lifting magnet beam sections 64, 65, can along each rear frame part have a series of circular magnets 81 (FIG. 1). e.g.. of the reversible type. or as shown in the amended embodiment in FIG. 6 an oblong plate magnet 100.
  • This oblong plate magnet 100 is expediently designed as an oblong plate-magnet of the reversible type.
  • the use or this type of magnets has the advantage that said magnets can be switched over between two positions,
  • a first position with the magnets having a maximum carrying capacity which means that the magnets are capable of carrying a heavy sheet
  • another position with the magnets having a reduced carrying capacity so that the transport apparatus is capable of lifting thin sheets.
  • an ordinary oblong platemagnet 100 may unintentionally be turned by the underlying sheets because of its large depth effect.
  • an oblong plate-magnet 100 of the reversible type is used, said magnets being made according to the same principle as the circular magnets described in the previously mentioned British Pat. specification No. 1,187,557, the advantage is achieved that the tractive force of the plate-magnets is concentrated upon the top part of the topmost sheet of the sheet stack, when the hoisting movement is started.
  • the plate magnet is to be current-controlled in such a way that after the hoisting movements having been started the plate-magnet is automatically switched from the position where the tractive force is concentrated upon the topmost sheet to a position where the plate-magnet has maximum tractive force.
  • the frame 1 of the front magnet beam section 63 is suspended from two carrying wires 95, one carrying wire being fixed to each side of the centre of the frame 1.
  • a weight indicator 38 (cf. FIG. 2) is built into one of the carrying wires 95.
  • the weight measured by the weight indicator corresponds substantially to a fourth of the weight of the sheet and a fourth of the weight of the magnet beam sections lying behind, as the weight indicator only measures the weight in one side of the front magnet beam section 63 and as the topmost sheet with its one end rests on the sheet stack 73 and the lifting magnet beam sections 64-70 rest on this stack. while the front magnet beam section 63 lifts the other end of the sheet. In this way just before the lifting operation is started a rough indication is obtained whether the sheet, with which the front magnet beam section is in engagement, is a thin or a thick sheet.
  • Each of the oblong plate-magnets 100 in the embodiment according to FIG. 6 is pivotally joumalled around a horizontal axis 83 which is parallel to the front or rear frame part 2 respectively 3 (FIG. 2).
  • a measuring means 84 mentioned below.
  • the oblong magnets and 21 in the front magnet beam section 63 is pivotally joumalled around end journals 113 respectively 114 (FIGS. 2 and 6) mounted in holes in the side-going frame parts 4 and 5.
  • Each lifting magnet beam section, for instance 64, has a measuring means, especially a micro-switch 84 (FIG.
  • the micro-switch 84 will switch off the current to the magnets 100 in the lifting magnet beam section 64 and to all the magnets 100 in the lifting magnet beam sections 65,66, 70 lying behind.
  • the front lifting magnet beam sections or the front lifting magnet beam section 64 in FIG.
  • the current will be means of the micro-switch 84 designed as a measuring means be switched-off to the magnets 100 of that lifting magnet beam section 65, the magnet 100 of which is turned an angle in relation to the sidegoing frame part of the lifting magnet beam section.
  • the micro-switch 84 is placed on the rear frame part of each lifting magnet beam section and activated by a spring 85 (FIG. 6) connected with the magnet 100.
  • a spring 85 (FIG. 6) connected with the magnet 100.
  • an activation of the micro-switch 84 when the magnet 100 is turned instead of a micro-switch, for instance a photoelectric cell or an inductive feeler or a potentiometer which produce a voltage proportional to the angular motion of the magnets can be used as a measuring means.
  • the magnet beam sections 63,64 are interconnected by means of movable, mechanical coupling links 99 as shown in FIGS. 2 and 6.
  • Each coupling link 99 consists preferably of two hinge plates 101 and 102, positioned on opposite frame parts 2 and 3 of adjacent magnet beam sections, such as for instance 63 and 64 in FIG. -6, and one hinge pin 1 03 extending through eyes in the hinge plates 101 and 102.
  • the coupling link 99 renders a robust and simple coupling link possible ensuring that turning can take place between two adjacent magnet beam sections.
  • the carrying wires (FIG. 6) of the front magnet beam section 63 are at their top ends connected with a pressure spring 96, placed in the girder 62.
  • the wires 97 from which the magnet beam sections 63-70 are suspended are at their top ends connected with a pressure spring 98 mounted on the girder 62.
  • the lifting magnet beam sections 65,66, 70 are lifted in succession up from the sheet stack 73.
  • the gantry crane transports the sheet 78 to the desired location where the sheet 78 is laid down by a lowering movement of the girder 62.
  • FIG. 8 The automatic lifting of a longer sheet 78 (FIG. 8), i.e., a sheet, the length of which is one and a half times the length of a magnet beam section, proceeds in the same way as described above in connection with the lifting of the short sheet 78 in FIGS. 6 and 7.
  • the position of the magnet beam shown in FIG. 8 corresponds to the position shown in FIG. 7.
  • the weight indicator 38 serves as mentioned above to ascertain whether a thin or a thick sheet is placed under the magnet beam.
  • the weight indicator 38 ensures that the used magnets 15,21, 100 of the reversible type are switched-on to either the thin plate function or the thick plate function, i.e., that the magnets function either as thin plate magnets or as thick plate'magnets (strong magnets).
  • the weight indicator 38 has indicated that a thin sheet is concerned, all the magnets 15,21,100 are switched-on as thin plate magnets. Thereafter the depth of the magnetic field is not greater than the thickness of the thin sheet. By lifting the magnet beam is hereby avoided that the magnet picks up more than the topmost sheet.
  • the magnets 15,21,100 are switched-on to thick plate function for purposes of security.
  • the gantry crane according to the invention with the oblique suspended magnet beam sections renders it possible to lift one sheet at a time from a buffer stack in which steel sheets of arbitrarily large length have been stacked.
  • Such sheet stacks are for instance found in sheet stores at shipbuilding yards.
  • a characteristic of the lifting operation of the magnet beam is that a sheet, when lifted, is first lifted up by its front edge.
  • a transport apparatus especially a gantry crane, provided with a magnet beam for lifting and transporting sheets of magnetizable material, especially steel sheets,from a stack of sheets which magnet beam has a girder and a series of spaced beam sections suspended from the girder by means of wires, each beam section having a frame with a front and a rear transverse frame part and two sidegoing frame parts and one or more electro magnets mounted in the frame, the sidegoing frame parts of each of the beam sections being situated in the same plane forming an angle ([3) to the surface of the sheets in the sheet stack.
  • a transport apparatus characterized in that the girder is suspended from the transport apparatus in a substantially horizontal position, and that the magnet beam sections are suspended from the girder by means of wires of various lengths so that the sidegoing frame parts of the magnet beam sections are placed in the same plane forming an angle (y) to the girder.
  • a transport apparatus characterized in that the girder is suspended from the transport apparatus in a substantially horizontal position and can be inclined relative to this position, and that the magnet beam sections are suspended from the girder by means of wires of the same lengths so that the sidegoing frame parts of the magnet beam sections are placed in the same plane.
  • a transport apparatus characterized in that the electro magnets of the magnet beam sections are magnets of the reversible type.
  • a transport apparatus characterized in that the series of magnet beam sections consists of a front magnet beam section, placed at the end of the girder situated at the greatest distance from the topmost sheet of the sheet stack and a number of behind lying lifting magnet beam sections, that the frame of the front magnet beam section is suspended from two carrying wires, one carrying wire being fixed to each side of the centre of the frame, that one of the carrying wires has a weight indicator built into it, and that the electro magnets of the front magnet beam section can lift at least half of the actual load. 7
  • each lifting magnet beam section has along its rear frame part an oblong plate magnet.
  • a transport apparatus characterized in that the plate magnet is designed as an oblong reversible-type plate magnet.
  • a transport apparatus characterized in that the magnet in each lifting magnet beam section is pivotally journalled around a horizontal axis, which is parallel to thefront or rear frame part.
  • each lifting magnet beam section is provided with a measuring means so arranged that when the magnet of a lifting magnet beam section during the lifting of the magnet beam is turned an angle in relation to the sidegoing frame part of the lifting magnet beam section, which angle is equal to the angle, which the sidegoing frame parts of the lifting magnet beam sections in their normal suspension position form with the surface of the sheets in the sheet stack, then the measuring means concerned will switch-off the current to the magnet of the lifting magnet beam section concerned, and to all the magnets of the behindlying lifting magnet beam sections.
  • a transport apparatus characterized in that the measuring means is a microswitch attached on the rear frame part of each lifting magnet beam section, and which can be activated by a spring connected with the magnet at the rear frame part of the lifting magnet beam section.
  • a transport apparatus characterized in that the magnet beam sections are interconnected by means of movable, mechanical coupling links.
  • each coupling link consists of hinge plates attached on opposite frame parts of adjacent magnet beam sections, and of hinge pins extending transversely through eyes in the hinge plates.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US00321402A 1972-01-06 1973-01-05 Transport apparatus Expired - Lifetime US3805978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB71272A GB1381522A (en) 1972-01-06 1972-01-06 Sheet transport apparatus

Publications (1)

Publication Number Publication Date
US3805978A true US3805978A (en) 1974-04-23

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US00321402A Expired - Lifetime US3805978A (en) 1972-01-06 1973-01-05 Transport apparatus

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US (1) US3805978A (sv)
JP (1) JPS4873951A (sv)
DE (1) DE2300280A1 (sv)
ES (1) ES410628A1 (sv)
GB (1) GB1381522A (sv)
SE (1) SE400756B (sv)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077507A (en) * 1974-12-16 1978-03-07 Bertin & Cie Metal sheet conveyor with linear electric motor and ground-effect shoe
US4136789A (en) * 1976-03-16 1979-01-30 B.V. Koninklijke Maatschappij "De Schelde" Conveying, storage and sorting system for large metal sheets, particularly for use in shipbuilding
US5151006A (en) * 1988-06-22 1992-09-29 Outokumpu Oy Automatic charging member
US6394519B1 (en) 1998-03-27 2002-05-28 R&D Engineering & Macining, Inc. Adjustable pick-and-place tool for an automated robotic device or the like
US10655335B2 (en) * 2016-11-14 2020-05-19 Innovatech, Llc System and method of assembling and installing commercial roofing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS592729U (ja) * 1982-06-24 1984-01-09 株式会社アマダ 板材の自動供給装置
CN113247755B (zh) * 2021-06-07 2021-12-14 河南工学院 一种用于薄板吊运的起吊装置及包括其的起重机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565927A (en) * 1947-06-28 1951-08-28 Morgan Construction Co Apparatus for handling annular articles
US3486784A (en) * 1966-11-02 1969-12-30 Nielsen & Son Maskinfab As H Magnet lifting yoke

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565927A (en) * 1947-06-28 1951-08-28 Morgan Construction Co Apparatus for handling annular articles
US3486784A (en) * 1966-11-02 1969-12-30 Nielsen & Son Maskinfab As H Magnet lifting yoke

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077507A (en) * 1974-12-16 1978-03-07 Bertin & Cie Metal sheet conveyor with linear electric motor and ground-effect shoe
US4136789A (en) * 1976-03-16 1979-01-30 B.V. Koninklijke Maatschappij "De Schelde" Conveying, storage and sorting system for large metal sheets, particularly for use in shipbuilding
US5151006A (en) * 1988-06-22 1992-09-29 Outokumpu Oy Automatic charging member
US6394519B1 (en) 1998-03-27 2002-05-28 R&D Engineering & Macining, Inc. Adjustable pick-and-place tool for an automated robotic device or the like
US10655335B2 (en) * 2016-11-14 2020-05-19 Innovatech, Llc System and method of assembling and installing commercial roofing
US11274450B2 (en) * 2016-11-14 2022-03-15 Innovatech Systems, Llc System and method of assembling and installing commercial roofing

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GB1381522A (en) 1975-01-22
JPS4873951A (sv) 1973-10-05
DE2300280A1 (de) 1973-07-19
SE400756B (sv) 1978-04-10
ES410628A1 (es) 1976-01-01

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Owner name: MAGNEMAG HAGOU A/S, METERBUEN 6-12, DK-2740 SKOVLU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:H. NIELSEN & SON MASKINFABRIK A/S;REEL/FRAME:003854/0872

Effective date: 19810305

Owner name: MAGNEMAG HAGOU A/S,, STATELESS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:H. NIELSEN & SON MASKINFABRIK A/S;REEL/FRAME:003854/0872

Effective date: 19810305