EP0736479B1 - Hoist clamp - Google Patents
Hoist clamp Download PDFInfo
- Publication number
- EP0736479B1 EP0736479B1 EP19960200162 EP96200162A EP0736479B1 EP 0736479 B1 EP0736479 B1 EP 0736479B1 EP 19960200162 EP19960200162 EP 19960200162 EP 96200162 A EP96200162 A EP 96200162A EP 0736479 B1 EP0736479 B1 EP 0736479B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frame part
- chain
- cable
- profile
- pulley
- 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 - Lifetime
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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
- B66C1/62—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 comprising article-engaging members of a shape complementary to that of the articles to be handled
- B66C1/64—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 comprising article-engaging members of a shape complementary to that of the articles to be handled for T- or I-section beams or girders
Definitions
- the present invention relates to a hoist clamp for picking up and manipulating for instance metal profiles, comprising a frame part which can be fitted to a chain or a cable, and a hook part, the frame part being provided with a clamping catch cooperating with the chain or the cable for securing, during hoisting, a profile held between the frame part and the hook part, the frame part being additionally provided with an adjustable chain pulley or cable pulley for the selection of a contact point of the chain or the cable on the hoist clamp.
- a hoist clamp of this type is known from EP-A-0 216 175.
- the prior art hoist clamp is of the compound type and acts in two places on the profile to be hoisted.
- the frame part is provided with an edge in which a number of indentations have been made, into which, prior to hoisting, the chain pulley or cable pulley can be placed. This enables, when for instance transporting wide profiles along narrow galleries in mines, an optimum position of the profile to be selected at all times.
- the present hoist clamp actually solves another problem in that it reduces the risks inherent in hoisting a heavy profile. More particularly, the invention prevents a profile during hoisting from unpredictably rotating about its longitudinal axis and possibly in consequence slipping loose from the hoist clamp. Additionally the invention enables a controlled rotation of the profile about its longitudinal axis to be performed, in the course of which for instance a lying H-profile is placed upright or the other way round.
- the invention is characterized in that the chain pulley or cable pulley is mounted on a swivelling arm which is rotatably fitted to the frame part, and in that the frame part is provided with means for locking the swivelling arm in two stable positions, one in which the chain or the cable is substantially perpendicular over the centre of gravity of the profile, and a second one which is differently positioned so that a measure of rotation will occur.
- An advantageous embodiment of the hoist clamp is characterized in that the frame part comprises two interconnected frame plates, provided at the outer edge with two pairs of matching indentations, into one pair of which, prior to hoisting, the chain pulley or cable pulley can be placed with the aid of the swivelling arm, for the selection of the contact point.
- the hoist clamp thus obtained has a low self-weight and a minimum of parts and is therefore inexpensive.
- Another advantageous embodiment of the hoist clamp is characterized in that a first indentation is provided for placing, during hoisting, a previously lying H-profile in an upright position and in that a second indentation is provided for placing a previously upright H-profile in a lying position.
- a still further advantageous embodiment of the hoist clamp is characterized in that means have been provided for the creation of a pre-tension on the clamping catch, prior to hoisting, preventing a profile from slipping loose from the clamp in the event of a rotation occurring before the clamping catch has been pulled sufficiently tight by the chain or cable.
- FIG. 1 shows a hoist clamp according to the invention, built up of two identical steel plates, of which only the foremost plate is visible.
- Each plate comprises a frame part 1 and a hook part 2, the plates being connected with a bridge element 18 and with a block 19, which is intended for increasing the grip on a profile 11 to be hoisted.
- the profile 11 is when hoisted clamped between the hook parts 2, together with block 19, and a clamping catch 12, which clamping catch 12 is capable of rotating about a spindle 13.
- a hoisting chain 9 is connected to clamping catch 12 with the aid of a pin 14.
- a chain pulley 10 is mounted to a swiveling arm 20 and the plates comprise two indentations 4,8 each, by which two stable positions for chain pulley 10 are realized.
- the swiveling arm 20 Prior to hoisting the swiveling arm 20 can be put manually into one of two possible stable positions, whereupon during hoisting swiveling arm 20 is fixed in that position through the action of chain 9 on chain pulley 10.
- a connection between swiveling arm 20 and frame part 1 is implemented as a pin 21 and slotted hole joint 22 respectively.
- the clamp With the swiveling arm fixed in the position represented by the dotted line in the figure, the clamp will lift profile 11 substantially without rotating it around its longitudinal axis. With the swiveling arm fixed in the position represented by the solid line in the figure, the clamp will rotate profile 11 at an angle which, when the profile is lowered onto a base, is sufficient for rotating it from a standing position to a lying position. When starting with profile 11 already in the lying position the hoist clamp evidently works the other way around.
- Clamping catch 12 is provided with a spring 16, for realizing a pre-tension for achieving a sufficiently strong grip before the force of the chain is optimally applied.
- spring 16 is in this realization implemented as a spiral spring, other spring types, such as leaf springs and cup springs, may also be applied. It is additionally shown how, with the aid of an array of notches 17 in clamping catch 12, an improved grip on profile 11 is obtained.
- the frame part of the hoist clamp is composed of two identical plates with a differently composed hook part fitted to it, for instance a solid hook part fitted between the frame parts by means of screwed connections.
- bridge element 18 and block 19 can be deleted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Description
- The present invention relates to a hoist clamp for picking up and manipulating for instance metal profiles, comprising a frame part which can be fitted to a chain or a cable, and a hook part, the frame part being provided with a clamping catch cooperating with the chain or the cable for securing, during hoisting, a profile held between the frame part and the hook part, the frame part being additionally provided with an adjustable chain pulley or cable pulley for the selection of a contact point of the chain or the cable on the hoist clamp.
- A hoist clamp of this type is known from EP-A-0 216 175. The prior art hoist clamp is of the compound type and acts in two places on the profile to be hoisted. For influencing the position of the profile about its longitudinal axis the frame part is provided with an edge in which a number of indentations have been made, into which, prior to hoisting, the chain pulley or cable pulley can be placed. This enables, when for instance transporting wide profiles along narrow galleries in mines, an optimum position of the profile to be selected at all times.
- The present hoist clamp actually solves another problem in that it reduces the risks inherent in hoisting a heavy profile. More particularly, the invention prevents a profile during hoisting from unpredictably rotating about its longitudinal axis and possibly in consequence slipping loose from the hoist clamp. Additionally the invention enables a controlled rotation of the profile about its longitudinal axis to be performed, in the course of which for instance a lying H-profile is placed upright or the other way round. To this end the invention is characterized in that the chain pulley or cable pulley is mounted on a swivelling arm which is rotatably fitted to the frame part, and in that the frame part is provided with means for locking the swivelling arm in two stable positions, one in which the chain or the cable is substantially perpendicular over the centre of gravity of the profile, and a second one which is differently positioned so that a measure of rotation will occur.
- An advantageous embodiment of the hoist clamp is characterized in that the frame part comprises two interconnected frame plates, provided at the outer edge with two pairs of matching indentations, into one pair of which, prior to hoisting, the chain pulley or cable pulley can be placed with the aid of the swivelling arm, for the selection of the contact point. The hoist clamp thus obtained has a low self-weight and a minimum of parts and is therefore inexpensive.
- Another advantageous embodiment of the hoist clamp is characterized in that a first indentation is provided for placing, during hoisting, a previously lying H-profile in an upright position and in that a second indentation is provided for placing a previously upright H-profile in a lying position.
- A still further advantageous embodiment of the hoist clamp is characterized in that means have been provided for the creation of a pre-tension on the clamping catch, prior to hoisting, preventing a profile from slipping loose from the clamp in the event of a rotation occurring before the clamping catch has been pulled sufficiently tight by the chain or cable.
- The invention will now be explained in detail with reference to the figure, which shows a hoist clamp according to the invention, built up of two identical steel plates, of which only the foremost plate is visible. Each plate comprises a frame part 1 and a hook part 2, the plates being connected with a
bridge element 18 and with ablock 19, which is intended for increasing the grip on aprofile 11 to be hoisted. Theprofile 11 is when hoisted clamped between the hook parts 2, together withblock 19, and aclamping catch 12, which clampingcatch 12 is capable of rotating about aspindle 13. A hoisting chain 9 is connected to clampingcatch 12 with the aid of apin 14. Between the plates making up the frame part 1 achain pulley 10 is mounted to aswiveling arm 20 and the plates comprise twoindentations 4,8 each, by which two stable positions forchain pulley 10 are realized. Prior to hoisting theswiveling arm 20 can be put manually into one of two possible stable positions, whereupon during hoistingswiveling arm 20 is fixed in that position through the action of chain 9 onchain pulley 10. To allow movement to at least some degree, a connection betweenswiveling arm 20 and frame part 1 is implemented as apin 21 and slottedhole joint 22 respectively. - With the swiveling arm fixed in the position represented by the dotted line in the figure, the clamp will lift
profile 11 substantially without rotating it around its longitudinal axis. With the swiveling arm fixed in the position represented by the solid line in the figure, the clamp will rotateprofile 11 at an angle which, when the profile is lowered onto a base, is sufficient for rotating it from a standing position to a lying position. When starting withprofile 11 already in the lying position the hoist clamp evidently works the other way around. - Clamping
catch 12 is provided with aspring 16, for realizing a pre-tension for achieving a sufficiently strong grip before the force of the chain is optimally applied. Althoughspring 16 is in this realization implemented as a spiral spring, other spring types, such as leaf springs and cup springs, may also be applied. It is additionally shown how, with the aid of an array ofnotches 17 inclamping catch 12, an improved grip onprofile 11 is obtained. - Although the explanation to the figure has been given for a hoisting appliance provided with a chain, a similar explanation can be given for a hoisting appliance provided with a cable, for instance a steel cable. Then for
chain pulley 10cable pulley 10 should be read. - It is furthermore possible for the frame part of the hoist clamp to be composed of two identical plates with a differently composed hook part fitted to it, for instance a solid hook part fitted between the frame parts by means of screwed connections. In that
case bridge element 18 andblock 19 can be deleted.
Claims (4)
- Hoist clamp for picking up and manipulating for instance metal profiles, comprising a frame part (1) which can be fitted to a chain (9) or a cable and a hook part (2), the frame part (1) being provided with a clamping catch (12) cooperating with the chain (9) or the cable for securing, during hoisting, a profile (11) held between the frame part (1) and the hook part (2), the frame part (1) being additionally provided with an adjustable chain pulley (10) or cable pulley for the selection of a contact point of the chain (9) or the cable on the hoist clamp, characterized in that the chain pulley (10) or cable pulley is mounted on a swivelling arm (20) which is rotatably fitted to the frame part (1) and in that the frame part (1) is provided with means (4,8) for locking the swivelling arm (20) in two stable positions.
- Hoist clamp as claimed in claim 1, characterized in that the frame part (1) comprises two interconnected frame plates, at the outer edges being provided with two pairs of matching indentations (4,8), into one pair of which, prior to hoisting, the chain pulley (10) or cable pulley can be placed with the aid of the swivelling arm (20), for the selection of the contact point.
- Hoist clamp as claimed in claim 2, characterized in that a first indentation is provided for placing, during hoisting, a previously lying H-profile in an upright position, and in that a second indentation is provided for placing a previously upright H-profile in a lying position.
- Hoist clamp as claimed in claim 3, characterized in that means (16) are provided for the creation of a pre-tension on the clamping catch (12), prior to hoisting.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1000047 | 1995-04-07 | ||
NL1000047A NL1000047C2 (en) | 1995-04-07 | 1995-04-07 | Lifting clamp. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0736479A1 EP0736479A1 (en) | 1996-10-09 |
EP0736479B1 true EP0736479B1 (en) | 1997-11-05 |
Family
ID=19760823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960200162 Expired - Lifetime EP0736479B1 (en) | 1995-04-07 | 1996-01-24 | Hoist clamp |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0736479B1 (en) |
DE (1) | DE69600095T2 (en) |
NL (1) | NL1000047C2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2411688B (en) * | 2004-03-05 | 2007-07-04 | Thomas Christopher Neil | Clamp |
GB2428731A (en) * | 2005-08-04 | 2007-02-07 | Pro Net Uk Ltd | Safety anchor |
KR101685897B1 (en) * | 2016-06-08 | 2016-12-13 | 서대운 | beam clamp |
CN109437013B (en) * | 2018-12-25 | 2024-06-07 | 湖州永兴特种不锈钢有限公司 | Super-large grinding wheel saw blade lifting appliance |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2412555A (en) * | 1943-10-27 | 1946-12-17 | Charles E Baker | Plate grapple |
US2945609A (en) * | 1959-04-23 | 1960-07-19 | Cullen Friestedt Company | Coil lifting and positioning mechanism |
FR1376867A (en) * | 1962-11-17 | 1964-10-31 | Schmidt | Grapple for lifting devices intended to lift heavy loads, for example in the form of a hook mechanism for cranes |
DE3430468A1 (en) * | 1984-08-18 | 1986-02-27 | Fa. August Thiele, 5860 Iserlohn | Device for lifting and/or transporting conveyor troughs |
DE3534261C1 (en) * | 1985-09-26 | 1987-07-02 | Rhein Ruhr Fabrikations Und Ha | Load beam |
-
1995
- 1995-04-07 NL NL1000047A patent/NL1000047C2/en not_active IP Right Cessation
-
1996
- 1996-01-24 DE DE1996600095 patent/DE69600095T2/en not_active Expired - Lifetime
- 1996-01-24 EP EP19960200162 patent/EP0736479B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69600095T2 (en) | 1998-04-16 |
NL1000047C2 (en) | 1996-10-07 |
EP0736479A1 (en) | 1996-10-09 |
DE69600095D1 (en) | 1997-12-11 |
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