EP0364728A1 - Pince de levage - Google Patents
Pince de levage Download PDFInfo
- Publication number
- EP0364728A1 EP0364728A1 EP89116719A EP89116719A EP0364728A1 EP 0364728 A1 EP0364728 A1 EP 0364728A1 EP 89116719 A EP89116719 A EP 89116719A EP 89116719 A EP89116719 A EP 89116719A EP 0364728 A1 EP0364728 A1 EP 0364728A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindle
- spindle part
- lifting clamp
- jaw
- lifting
- 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.)
- Granted
Links
Images
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
- B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
- B66C1/48—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces to vertical edge portions of sheets, tubes, or like thin or thin-walled articles
Definitions
- the invention relates to a lifting clamp with a clamp body which delimits a load-receiving space and which has two opposing jaws, of which at least one jaw can be moved towards or away from the load-carrying space by means of a device in a movement path.
- Such lifting clamps serve as load-carrying means for the transport of metal sheets, welded structures, machine bodies or the like.
- a one-piece spindle is rotatably mounted in the clamp body as a device for moving the jaw.
- the spindle is screwed in or out to move the jaw connected to the spindle towards or away from the jaw within the load-receiving space of the clamp, for example to clamp or hold a sheet of metal for a transport process by means of a crane between the two jaws.
- the protrusion of that part of the spindle, via which the spindle can be driven for the movement of the jaw and which protrudes from the lifting body on the side of the clamp body facing away from the load receiving space is correspondingly large if the distance between the two jaws is large , which is the case, for example, if one is appropriate thick sheet metal plate or a stack of several sheets lying one above the other in the load receiving space of the lifting clamp is clamped between the jaws or is to be clamped.
- the end of the spindle facing away from the load receiving space can protrude very far from the clamp body by a protrusion.
- the invention is therefore based on the object to provide a lifting clamp in which a more compact design of the same can be achieved in order to increase the possible uses for lifting clamps.
- This object is achieved by a lifting clamp with the features of claim 1.
- an at least two-part spindle is used in a lifting clamp, can be rotated in the clamp body, which is within the Load receiving space of the lifting clamp for clamping or releasing a good to be transported, second spindle part which can be moved forwards or backwards with the jaw, which is guided longitudinally in the first spindle part and can be driven by it, telescopically extend or retract from it.
- the movement path of the movable jaw runs in a straight line, preferably in a horizontal plane.
- an optimal application of force of the clamp to the material to be clamped for example a sheet metal plate, which can be inserted transversely to the horizontally running movement path of the jaw into the load receiving space of the lifting clamp, is achieved.
- the second spindle part has an external thread for guiding in an internal thread of the first spindle part and the first spindle part has an external thread for guiding in a continuous internal thread of the clamp body, the external thread of the first spindle part and that of the second spindle part are opposed to each other.
- all threads of the spindle drive used have approximately the same thread pitch.
- the two-part spindle according to the invention achieves a travel of twice the distance covered by the movable jaw with one spindle revolution than with the lifting clamps according to the prior art with only one spindle drive and comparable thread pitch. Furthermore, this means that in the lifting clamp according to the invention, the clamping gap formed by the two jaws can be increased or decreased in half the time compared to what has been known to date.
- the first spindle part is rotatable but axially immovable, preferably by means of a bushing, which runs parallel to the path of movement of the movable jaw in the clamp body, in this in the clamp body.
- the second spindle part can be driven and moved without the first spindle part executing such an axial movement.
- a constant and very small projection of the end of the two-part spindle facing away from the load-receiving space from the clamp body can be achieved, which can be advantageous when the lifting clamp is used in particularly restricted space.
- the second part of the spindle with the jaw then behaves with regard to the distance that can be covered and the time required for this, just as with a one-piece spindle with a comparable thread pitch.
- the two-part spindle has an anti-twist protection which secures the two spindle parts against mutual twisting. It is hereby achieved that when driving, i.e. the rotation of the first spindle part, the second spindle part is not carried along during the rotary movement by frictional forces between the threads of the first and second spindle parts, which could prevent the jaw to be moved from moving to and from the opposite jaw, but rather from the rotational movement of the first spindle part positively coupled via the anti-rotation protection in any case results in a corresponding feed movement of the second spindle part with the jaw.
- the second spindle part on the end of the spindle projecting into the load-receiving space, has a spherical head on which the adjustable jaw is pivotably arranged, which is convex on its side facing the opposite jaw, the radius of curvature the convex side of the jaw is larger than the pivot radius of the jaw when pivoting the same on the ball head.
- an actuating member in the form of a star grip is provided for driving the first spindle part of the two-part spindle.
- a star grip enables the spindle of the lifting clamp to be opened and closed quickly and powerfully.
- the actuating member is usually a spindle mandrel, which is only supplied loosely with the respective lifting clamp and which can be used to open or close the lifting clamp, i.e. to rotate the one-piece spindle, into the end of the load receiving space opposite the same for the rotary movement. The result of this is that this spindle mandrel can be lost very easily and that the known lifting clamps can then only be opened or closed using other tools.
- the lifting clamp has a clamp body designated as a whole as 10, which is essentially C-shaped in the side view shown in the figure and which delimits a load-receiving space 12.
- a fixed jaw 16 or a device designated as a whole by 18 is received, by means of which a movable jaw 20 can be moved towards or away from the fixed jaw 16.
- a width-adjustable clamping gap 22 for receiving the goods to be transported is delimited by the two jaws 16 and 18.
- a shackle 26 is rotatable on the upper side of the clamp body 10 about a bolt 24 passing through the clamp body 10, i.e. essentially a U-shaped part for receiving a load hook (not shown) ) of the crane, articulated.
- the fixed jaw 16 is embedded in a recess 28 of the leg 14a of the clamp body 10 and is firmly connected to it via a screw connection 30.
- the fixed jaw 16 protrudes with its side facing the movable jaw over this recess to form a flat and essentially vertical clamping surface 31 for the material to be clamped out of the recess 28.
- the device 18 for moving the movable jaw 20 is formed from a two-part spindle 32 which has a first and a second spindle part 34 and 36, respectively.
- the first spindle part 34 has an uninterrupted external thread 38, which is guided in a continuous internal thread 40 of the leg 14b of the clamp body 10, which is cut into a bore of the leg 14b of the clamp body 10, which runs essentially horizontally, and whose diameter corresponds to the diameter of the corresponds to the first spindle part 34 to be accommodated.
- the external thread 38 of the first spindle part 34 has a greater length than the continuous internal thread 40 of the leg 14b of the clamp body 10.
- first spindle part 34 Inside the first spindle part 34 there is a bore 42, the length of which is somewhat shorter than the length of the external thread 38 of the first spindle part 34.
- An internal thread 44 is cut into this bore 42, the diameter of which corresponds to the diameter of the second spindle part 36 an external thread 46 of the second spindle part 36 is guided, which extends for the longitudinal movement of the movable jaw 20 over the entire length of the second spindle part 36.
- the external thread 38 of the first spindle part 34 and the continuous internal thread 40 of the clamp body 10 are each a right-hand thread and the external thread 46 of the second spindle part 36 and the internal thread 44 of the first spindle part are each a left-hand thread.
- the external thread 38 of the first spindle part 34 and the external thread 46 of the second spindle part 36 are therefore counter to one another. All threads used for the spindle drive have approximately the same thread pitch.
- the latter has a ball head 48.
- the movable jaw there is a recess 50 corresponding to the diameter of the ball head 48 for receiving the ball head 48, which in a known and therefore not shown manner by means of a snap ring 52 for the connection of the movable jaw 20 with the ball head 48 in this recess 50 is held.
- the movable jaw 20 is mounted on the ball head 48 in such a way that it can be pivoted up or down by a certain amount about the ball center axis 54 running perpendicular to the plane of the drawing.
- the side 56 of the movable jaw 20 facing the fixed jaw 16 is convex, the radius of curvature of the convex side being greater than the pivot radius of the movable jaw 20 when pivoting on the ball head 48.
- the latter On the underside of the second spindle part 36, the latter has a holding part 58 which is fixedly connected to it and which has two ends 60a and 60b which run at right angles to one another, the end 60b running parallel to the movement path of the movable jaw 20 in a likewise longitudinal guide 62 in the leg 14b of the clamp body 10 is guided axially.
- This holding part 58 represents an anti-rotation device that prevents the two spindle parts 34 and 36 from rotating against one another, which impairs the movement of the movable jaw 20.
- the longitudinal guide 62 extends lengthwise through the entire leg 14b of the clamp body 10 and emerges with its two ends on the two opposite sides of the leg 14b.
- the leg 14b has on its underside a projection 64 which protects the device 18 from damage, for example when the lifting clamp is placed on a stack of sheet metal plates, when it is lowered.
- the latter is firmly connected to the first spindle part 34 via a pin connection 68.
- the lifting clamp essentially works as follows: When the star grip 66 is turned to the right, i.e. clockwise as seen in the figure, the first spindle part 34 moves to the left as seen in the figure due to the right-handed threads 38 and 40 which correspond to one another, i.e. into the load-bearing space 12. Due to the left-handed threads 44 and 46, during this rotational movement of the first spindle part 34 in a clockwise direction, the second spindle part 36 is telescopically moved out of the first spindle part 34 and the movable jaw 20 is moved towards the fixed jaw 16, thus reducing the width of the clamping gap 22 .
- the movable jaw 20 is pivoted downward about the axis 54, and the stronger, the greater the attached load.
- the upper half of the convex side 56 is pivoted into the clamping gap 22, which reduces its width and leads to a secure clamping of the goods to be transported.
- actuating element for example a toggle grip or the like
- the outer circumference of the actuating member does not protrude beyond the underside of the clamp body 10, which could lead to its unwanted actuation and thus to the unintentional and dangerous opening of the clamp.
- the jaw 20 movable by means of the device 18 can also be used, so that in such a lifting clamp there are two jaws which can be moved towards or away from one another in the clamp body 10 and can each be driven via the device 18.
- the first spindle part 34 cannot be guided via the external thread 38 in the continuous internal thread 40 of the clamp body 10, but by means of a bushing (not shown) to be inserted into the clamp body 10, which holds the first spindle part axially immovable but rotatable in the clamp body 10. It is hereby achieved that the second spindle part 36 moves linearly by a rotational movement of the first spindle part 34, without an axial movement of the first spindle part 34 taking place.
- the actuator for the spindle for example the star grip 66
- the star grip 66 can be placed very close to the clamp body 10, which makes the protrusion of the first spindle part 34 and star grip 66 beyond the clamp body 10 very small.
- the same number of rotary movements as in the known lifting clamps with a one-piece spindle with a comparable thread pitch must then be applied to the first spindle part in order to linearly move the second spindle part with the movable jaw 20 into the respective position.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Jigs For Machine Tools (AREA)
- Manipulator (AREA)
- Paper (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89116719T ATE82940T1 (de) | 1988-10-11 | 1989-09-09 | Hebeklemme. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8812717U DE8812717U1 (fr) | 1988-10-11 | 1988-10-11 | |
DE8812717U | 1988-10-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0364728A1 true EP0364728A1 (fr) | 1990-04-25 |
EP0364728B1 EP0364728B1 (fr) | 1992-12-02 |
Family
ID=6828719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89116719A Expired - Lifetime EP0364728B1 (fr) | 1988-10-11 | 1989-09-09 | Pince de levage |
Country Status (5)
Country | Link |
---|---|
US (1) | US5005890A (fr) |
EP (1) | EP0364728B1 (fr) |
JP (1) | JPH02163286A (fr) |
AT (1) | ATE82940T1 (fr) |
DE (2) | DE8812717U1 (fr) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5255950A (en) * | 1991-11-08 | 1993-10-26 | J.C. Renfroe And Sons, Inc. | Clamp with freely rotatable coupling and associated method of rotatably manipulating a structural member |
US6412767B1 (en) * | 1998-03-06 | 2002-07-02 | American Tool Companies, Inc. | Clamping jaw |
EP1475189A1 (fr) * | 2003-05-07 | 2004-11-10 | Industrias Piqueras, S.A. | Tête déplaçable pour étaus |
US7175143B1 (en) * | 2003-09-18 | 2007-02-13 | Trang Heather Ho | Portable accessory hook |
US8336867B1 (en) | 2006-09-01 | 2012-12-25 | Chick Workholding Solutions, Inc. | Workholding apparatus having a detachable jaw plate |
US8454004B1 (en) * | 2006-09-01 | 2013-06-04 | Chick Workholding Solutions, Inc. | Workholding apparatus having a movable jaw member |
US9227303B1 (en) | 2006-09-01 | 2016-01-05 | Chick Workholding Solutions, Inc. | Workholding apparatus |
US8573578B1 (en) | 2006-09-01 | 2013-11-05 | Chick Workholding Solutions, Inc. | Workholding apparatus |
WO2009094302A2 (fr) * | 2008-01-21 | 2009-07-30 | Erico International Corporation | Fixation structurelle universelle pour entretoisement séismique |
US8353486B2 (en) * | 2008-01-21 | 2013-01-15 | Erico International Corporation | Lateral seismic brace |
US7819448B2 (en) * | 2008-03-03 | 2010-10-26 | Cooper Brands, Inc. | Plate lifting clamp |
DE102012013566A1 (de) * | 2012-07-06 | 2014-05-08 | Carl Stahl Gmbh | Verbindungseinrichtung |
US9352451B1 (en) | 2013-05-02 | 2016-05-31 | Chick Workholding Solutions, Inc. | Workholding apparatus |
RU174604U1 (ru) * | 2017-03-07 | 2017-10-23 | Федеральное государственное автономное образовательное учреждение высшего образования "Северный (Арктический) федеральный университет имени М.В. Ломоносова" (САФУ) | Фрикционное грузозахватное устройство |
US10981261B2 (en) * | 2017-07-13 | 2021-04-20 | Indian Springs Mfg. Co. Inc. | Container clamp assembly |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR900785A (fr) * | 1943-12-24 | 1945-07-09 | Montures de scies et clefs | |
US2420002A (en) * | 1944-10-23 | 1947-05-06 | Leslie J Mckay | Bench vise |
FR1099580A (fr) * | 1954-02-16 | 1955-09-07 | Dispositif permettant d'imprimer simultanément à plusieurs organes un mouvement relatif | |
US2919614A (en) * | 1955-07-05 | 1960-01-05 | Gen Dynamics Corp | Clamping device |
DE1126098B (de) * | 1958-05-24 | 1962-03-22 | Iaweseria Ag | Transportklaue |
BE669554A (fr) * | 1964-10-05 | 1965-12-31 | ||
FR1460024A (fr) * | 1965-10-14 | 1966-06-17 | Serre-joint | |
DE2512236A1 (de) * | 1975-03-20 | 1976-10-07 | Smw Spanneinrichtungen | Verstellspindel |
FR2342937A1 (fr) * | 1976-03-04 | 1977-09-30 | Renfroe & Sons Inc J | Pince de levage du type a vis |
DE2754964A1 (de) * | 1976-12-29 | 1978-07-06 | Paul Eckli | Vorrichtung fuer die loesbare halterung von apparaten an feststehenden einrichtungen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2370042A (en) * | 1940-11-20 | 1945-02-20 | Jesionowski John | Vise |
US2604352A (en) * | 1947-06-13 | 1952-07-22 | Gonser Harry Aden | Lift bar clamp |
US2662433A (en) * | 1950-02-08 | 1953-12-15 | Caroline A Braun | Device for simultaneously clamping and releasing plural workpieces |
DE1812325A1 (de) * | 1968-12-03 | 1970-07-23 | Arnold Franz | Mechanische Spannvorrichtung,insbesondere Maschinenschraubstock |
JPS5243062A (en) * | 1975-10-02 | 1977-04-04 | Eagle Kuranpu Kk | Screw type clamp |
SE431798B (sv) * | 1979-12-18 | 1984-02-27 | Bofors Ab | Lyftanordning for ammunition |
US4417361A (en) * | 1982-05-17 | 1983-11-29 | Guardian Products Company, Inc. | Grab bar |
US4850630A (en) * | 1986-01-14 | 1989-07-25 | J.C. Renfroe & Sons, Inc. | Clamp with movable jaw structure |
-
1988
- 1988-10-11 DE DE8812717U patent/DE8812717U1/de not_active Expired
-
1989
- 1989-09-09 EP EP89116719A patent/EP0364728B1/fr not_active Expired - Lifetime
- 1989-09-09 DE DE8989116719T patent/DE58902892D1/de not_active Expired - Fee Related
- 1989-09-09 AT AT89116719T patent/ATE82940T1/de not_active IP Right Cessation
- 1989-10-05 US US07/417,467 patent/US5005890A/en not_active Expired - Fee Related
- 1989-10-11 JP JP1266075A patent/JPH02163286A/ja active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR900785A (fr) * | 1943-12-24 | 1945-07-09 | Montures de scies et clefs | |
US2420002A (en) * | 1944-10-23 | 1947-05-06 | Leslie J Mckay | Bench vise |
FR1099580A (fr) * | 1954-02-16 | 1955-09-07 | Dispositif permettant d'imprimer simultanément à plusieurs organes un mouvement relatif | |
US2919614A (en) * | 1955-07-05 | 1960-01-05 | Gen Dynamics Corp | Clamping device |
DE1126098B (de) * | 1958-05-24 | 1962-03-22 | Iaweseria Ag | Transportklaue |
BE669554A (fr) * | 1964-10-05 | 1965-12-31 | ||
FR1460024A (fr) * | 1965-10-14 | 1966-06-17 | Serre-joint | |
DE2512236A1 (de) * | 1975-03-20 | 1976-10-07 | Smw Spanneinrichtungen | Verstellspindel |
FR2342937A1 (fr) * | 1976-03-04 | 1977-09-30 | Renfroe & Sons Inc J | Pince de levage du type a vis |
DE2754964A1 (de) * | 1976-12-29 | 1978-07-06 | Paul Eckli | Vorrichtung fuer die loesbare halterung von apparaten an feststehenden einrichtungen |
Also Published As
Publication number | Publication date |
---|---|
US5005890A (en) | 1991-04-09 |
JPH02163286A (ja) | 1990-06-22 |
DE8812717U1 (fr) | 1988-11-24 |
ATE82940T1 (de) | 1992-12-15 |
DE58902892D1 (de) | 1993-01-14 |
EP0364728B1 (fr) | 1992-12-02 |
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