CA1141592A - Tensioning device, especially for tie-down chains - Google Patents
Tensioning device, especially for tie-down chainsInfo
- Publication number
- CA1141592A CA1141592A CA000342470A CA342470A CA1141592A CA 1141592 A CA1141592 A CA 1141592A CA 000342470 A CA000342470 A CA 000342470A CA 342470 A CA342470 A CA 342470A CA 1141592 A CA1141592 A CA 1141592A
- Authority
- CA
- Canada
- Prior art keywords
- tensioning device
- combination according
- hook
- chain
- link members
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
- F16G11/12—Connections or attachments, e.g. turnbuckles, adapted for straining of cables, ropes, or wire
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
ABSTRACT
A tensioning device for tie-down chains is provided. It has a pair of hinge elements at one end that move towards one another into a closed position for retaining a chain link. The hinge means is configured to be self-releasing under the tension on a retained chain, so that upon release of a locking means, the tensioning device releases quickly. Where desired the tensioning device may have a ratchet operator for operating the tension-ing mechanism.
A tensioning device for tie-down chains is provided. It has a pair of hinge elements at one end that move towards one another into a closed position for retaining a chain link. The hinge means is configured to be self-releasing under the tension on a retained chain, so that upon release of a locking means, the tensioning device releases quickly. Where desired the tensioning device may have a ratchet operator for operating the tension-ing mechanism.
Description
1~4~S92 The inventioll relates to a tensionillg device particularly for tie down chains.
DE OS 26 23 827 discloses a device, to be used in conj~mction with a releasable locking means for tensioning tyre chains. This tensioning device has proven satisfactory in use, al~hough locking and unlockillg it requires more than one step. For instance at least one safety-pin must be released and the chain must be lifted out of a hooked hinge-member. This known tensioning device is too complex under certain circumstances, for example in emergency conditions. This applies more particularly when the device is to be used to tension chains~ for tying goods down, since it often becomes necessary to release a number of locking means in a very short time. Further-more, locking and unlocking this known tensioning device requires not only sufficient room but also under certain circumstances, the use of tools.
It is the purpose of the invention to provide a tensioning device designed in such a manner that it can be easily connected to and disconnected from a chain even when there is very little room and without the use of tools.
According to the invention there is p-rovided a tensioning device that fulfills three functions including a coarse shortening of a chain, a tension-ing thereof and a rapid opening thereof, especially for lashing chains having chain links in a chain strand of chain members, which comprises in combination:
a housing, a double nut rotatably journalled over a part of the length thereof being protected in said housing, two link members for receiving chain links, at least one link member having a receiving opening in which at least sub-stantially each chain member of the chain strand can be connected, said link members being movable relative to one another and having a releasable latch means including a securing member associated with the receiving opening of at least one link member with which a chain member located in the receiving opening is to be secured, said securing member being mounted at least - 1 - ~, 114~59Z
partially yieldably shiftable in a released position as journalled on the tensioning device, at least one of said link members having a fork-like shape with two freely projecting legs which extend parallel to one another and are interconnected by a transverse piece, said link members being adapted to be held in a closure position under tension, with at least one link member, under the force of a connected tensioned chain, being adapted to be movable rapidly into a release position, two spindles with a left thread and a right thread journalled in said double nut so that said spindles simultaneously can be adjusted oppositely relative to each other with said double nut including both tensioning and coarse shortening therewith, without any additional auxiliary tools, and an actuating element rigidly connected upon said double nut for rotation of said double nut, said spindles projecting with ends thereof away from each other out of said double nut and being provided at these ends with a connection link member providing one receiving opening for the chain member.
The design according to the invention permits rapid and reliable - la -~14~59Z
locking, tensioning and ~mlocking of a tie-down chain, without the use of additional tools. It is also possible to use the device where there is little room for rotating a turnbuckle where one of the connectors or hingc members opens automatically, under chain tension, after the relevant locking means have been released. All parts are easily accessible and operate reliably, and this allows the tensioning device according to the invention to be used under emergeny conditions also.
In order to ensure that the hinge members are not twisted during the tie-down, but maintain their position in relation to the tensioning device while the chains are being tensioned, one preferred characteristic of the invention provides two spindles, having right, left-hand threads respectively for moving the hinge members. The spindles are adjustable in opposite directions by means of a double nut. A slotted tube to guide the spindles is arranged between them and the double nut. The spindles are guided longitudinally in the slotted tube during tying-down, so that the hinge members connected to the said spindles maintain their positions in relation to the tensioning device during the adjust-ing process. The slotted tube also achieves compulsory opening of the syindles, so that the latter are adjusted simultaneously in opposite directions under all circumstances.
In the accompanying drawings, which illustrate exemplary embodiments of the present invention:
Figure 1 is a plan view of a tensioning device according to the invention, comprising pivotable hooks, a safety-sleeve, and a forked hinge-member;
Figure 2 is a section along the line I-[ in Figure l;
Figure 3 is a plan view of a variant of the releasable locking means, with pivotable hooks;
Figure 4 is a section along the line III-III in Figure 3;
Figure 5 is an enlarged view of point A in Figure 1, partly in section;
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Figure 6 is an enlarged view of point B in Figure 2, partly in section;
Figure 7 is a plan view of another variant of the locking means, with a spring-loaded support-piece;
Figure 8 is a section along the line VII-VII in Figure 7, with an adjoining tensioning device having a ratchet;
Figure 9 is a side elevation in direction C according to Figure 7 and is fou~d~on t~e $ame sheet as Figure 7;
Figure 10 is a vertical section through the built-in ratchet;
Figure 11 is a longitudinal section through another variant of the tensioning device;
Figure 12 is a section along the line XI-XI in Figure 11.
Referring to the drawings, and particularly to Figures 1 and 2, the tensioning device has two spindles 13, each having a self-locking thread 22. The threads are right and left-hand on the respective spindles. The two spindles 13 are mounted in a double nut 6. Tensioning is effected by means of serrated hand-tube 10, permitting the transfer of a force of about 4000 N.
For larger preload forces, a ratchet, to be described hereinafter, replaces the tube 10, see Figure 8. A tensioning stoke of up to 75 mm to right and ZO left is provided by rotating tube 10. Tube 10 is secured to double nut 6 by means of a locking pin 11. The rota-l~ motion for tensioning the device is indicated by a mark "ON" or the like made on tube 10. A tube 5 protects spindles 13 from dust and dirt. Numeral 21 indicates a stop pin.
All parts of the tensioning device are rsplaceable and above all maintenance-free. Parts in direct engagement with outside parts are heat-treated to promote wear-resistance. The tensioning device is reliable even when dirty and covered with dust. The material used may be 16 ~fn Cr 5.
The tensioning device has, at one end, a pivotable hook 1. The ~14159~Z
opening for the accommodatlon of the chain, formed by this hook, is bridged by lever 2. Hook 1 is arranged between the two parallel freely projecting legs of a forked connector 3 and is adapted to pivot about the axis of a pin 4.
The configuration of hook 1 is such that a moment arm x is formed between axis 4 of rotation of hook 1 and the line of action of the force exerted by a chain 16 on the hook, i.e. the tension of the chain must be applied eccentrically with respect to the pin 4. The moment produced acts in a direct-ion tending to open the hook 1. This configuration of the hook leads to faster unlocking. After the locking means of pivotable hook 1 has been released the latter pivots downwardly and thus immediately releases the chain. This release of the chain is assisted by the eccentric point of application of the chain tension in hook 1. Rapid and easy unlocking is thus assured.
As shown in Figures 1 and 2, lever 2 also pivots about the pin 4 but it may also be rigidly attached. The lever 2 consists of two parts adjoining the legs of forked connector 3 and lying in the plane of those legs. It may be straight or curved in a direction opposite to that of hook 1.
What is important is that the opening formed by hook 1, for the accommodation of the chain, be bridged. When curved, lever 2 forms a ring with hook 1, as shown in Figure 2.
As shown in Figures 3 and 4, the two parallel legs of forked connector 3 may be bent obliquely upwards, thus bridging the opening formed by hook l for the accommodation of the chain. In this case, the bent legs serve as a rigid lever 2 and the free end of pivotable hook 1 is connected detachably to the said lever. Any suitable means of attachment may be used for this detachable connection. In the example in question, use is made of a locking pin 1~. As may be gathered from Figures 3 and 4, the hinged members may be incorporated alone, without any tensioning device, as independent elements 114~S9Z
in$o the tie-down system.
I`t is also possible, to lock the pivotable hook without loading the lever 2. To this end, hook 1 is extended beyond pin 4 and the extended port-ion is locked to the tensioning device - Figure 2. This locking is effected by means of a sliding sleeve 7 mounted displaceably upon the said tensioning device. With hook 1 in the locked position, sleeve 7 is pushed over the end of the extension of hook 1. ~his end of hook 1 has a recess in which a correspondingly designed part of sliding sleeve 7 is engaged. Since the sleeve 7 is displaceable upon the tensioning device, recess 15 in hook 1 must run parallel, or almost parallel, with the outer wall of the tensioning device. Sleeve 7 is mounted upon a compressi~n-spring 9. Spring clips 8 retain the sleeve 7 and spring 9 on the tube 5. Rapid unlocking is achieved merely by pushing sleeve 7 back. This releases the extension of pivotable hook 1, allowing the latter to pivot downwardly under the load. This releases chain 16 and the tie-down point.
According to Figures 1 and 2, forked connection 3 and forked hinge-member 3' are located at the ends of the tensioning device and are displaceable in relation to each other. Locking pin 12 in hinge-member 3' allows chain 16 to be roughly shortened very rapid]y. As may be gathered from Figures 5 and 6, pin 12 may be secured in forked hinge-member 3', preferably by two balls 17 acted upon by compression springs. Each ball 17 has a compression spring 18 mounted in a guide 20 accessible from the outside. Suitable counter-pressure causes the said balls to move in the direction of spring-guide 20, thus allowing locking pin 12 to be inserted into the aligned apertures in the paral-lel legs of forked hinge-member 3'. If the counter-pressure acting upon balls 17 ceases or is reduced, compression springs 18 cause a part of the surface of each ball to project out of ~pring-guide 20. The projecting parts of the balls engage in corresponding recesses in pin 12. A spring-loaded ball 17 is ~14~59Z
preferably provided in each leg of hinge-member 3', to ensure that the said pin does not inadvertently fall out. Appropriate tension applied to pin 12 forces the balls back in the direction of spring-guide 20, provided that the said tension is greater than the force of the springs.
Spring-guide 20 is preferably at an angle of 45 to the axis of pin 12. In order to facilitate introduction, the diameter of pin 12 is somewhat smaller than that of the apertures provided for the accommodation thereof. Play 14 therefore remains between the walls of the said apertures and the pin.
As already indicated, the tensioning device with the hand-tube 10~
illustrated in Figures 1 and 2, is suitable for small preload forces of up to about 4000 N. For larger preloads, it is preferable to use a ratchet 23.
As may be gathered from Figure 8, the ratchet is arranged centrally of the tensioning device. It has hitherto been usual to use tommy-bars for large tensioning forces. However, in contrast to ratchets, tommy-bars can be used only when enough room is available to rotating the tensioning device. Ratchet-bar 24 is arranged to fold and has a detent arrangement ~not shown). If the said bar were to project, there would be a danger of injury and tripping.
The tension achieved is maintained by a locking means 29.
The quick-release mechanism arranged at one end of the tensioning device comprises a spring-loaded element 25 which is free to pivot in all directions. One end of spring 26 thereof is guided upon a stud 27 fitted to end-plate 28 of the tensioning device. The other end of the said spring is accommodated in a recess in element 25. Fitted to the other end of the tensioning device is the forked hinge-member 3' described above.
The tensioning device according to Figures 11 and 12 has two spindles 13a with right and left-hand threads respectively. A double nut 6a is mounted on each spindle, preferably by means of a threaded bush 30. Part of the length ~14~59Z
of the double nut is covered with a hand-tube lOa which is prevented from rotating, in relation to the said double nut, by a locking pin lla. In the area between the two bushes 30, spindles 13a are surrounded by tubes 31 loc-ated between the spindles and double nut. Tubes 31 are spaced from spindles 13a and bear against the inner walls of the said double nuts. Each of the spindles is provided near the end facing the other spindle, with a guide-pin 32 engaging in a slot 33 running lengthwise of tube 31.
Rotating hand-tube lOa causes the double nuts and, through threaded bushes 30, the two spindles 13a, to move simultaneously in opposite directions.
Since the said spindles are guided by pins 32 in slots 33, this produces very uniform simultaneous adjustment of the spindles. This guidance also prevents the spindles from rotating about their axes, and thus prevents the hinge-members ~Figures 1 and 2), which are secured thereto, from being rotated.
DE OS 26 23 827 discloses a device, to be used in conj~mction with a releasable locking means for tensioning tyre chains. This tensioning device has proven satisfactory in use, al~hough locking and unlockillg it requires more than one step. For instance at least one safety-pin must be released and the chain must be lifted out of a hooked hinge-member. This known tensioning device is too complex under certain circumstances, for example in emergency conditions. This applies more particularly when the device is to be used to tension chains~ for tying goods down, since it often becomes necessary to release a number of locking means in a very short time. Further-more, locking and unlocking this known tensioning device requires not only sufficient room but also under certain circumstances, the use of tools.
It is the purpose of the invention to provide a tensioning device designed in such a manner that it can be easily connected to and disconnected from a chain even when there is very little room and without the use of tools.
According to the invention there is p-rovided a tensioning device that fulfills three functions including a coarse shortening of a chain, a tension-ing thereof and a rapid opening thereof, especially for lashing chains having chain links in a chain strand of chain members, which comprises in combination:
a housing, a double nut rotatably journalled over a part of the length thereof being protected in said housing, two link members for receiving chain links, at least one link member having a receiving opening in which at least sub-stantially each chain member of the chain strand can be connected, said link members being movable relative to one another and having a releasable latch means including a securing member associated with the receiving opening of at least one link member with which a chain member located in the receiving opening is to be secured, said securing member being mounted at least - 1 - ~, 114~59Z
partially yieldably shiftable in a released position as journalled on the tensioning device, at least one of said link members having a fork-like shape with two freely projecting legs which extend parallel to one another and are interconnected by a transverse piece, said link members being adapted to be held in a closure position under tension, with at least one link member, under the force of a connected tensioned chain, being adapted to be movable rapidly into a release position, two spindles with a left thread and a right thread journalled in said double nut so that said spindles simultaneously can be adjusted oppositely relative to each other with said double nut including both tensioning and coarse shortening therewith, without any additional auxiliary tools, and an actuating element rigidly connected upon said double nut for rotation of said double nut, said spindles projecting with ends thereof away from each other out of said double nut and being provided at these ends with a connection link member providing one receiving opening for the chain member.
The design according to the invention permits rapid and reliable - la -~14~59Z
locking, tensioning and ~mlocking of a tie-down chain, without the use of additional tools. It is also possible to use the device where there is little room for rotating a turnbuckle where one of the connectors or hingc members opens automatically, under chain tension, after the relevant locking means have been released. All parts are easily accessible and operate reliably, and this allows the tensioning device according to the invention to be used under emergeny conditions also.
In order to ensure that the hinge members are not twisted during the tie-down, but maintain their position in relation to the tensioning device while the chains are being tensioned, one preferred characteristic of the invention provides two spindles, having right, left-hand threads respectively for moving the hinge members. The spindles are adjustable in opposite directions by means of a double nut. A slotted tube to guide the spindles is arranged between them and the double nut. The spindles are guided longitudinally in the slotted tube during tying-down, so that the hinge members connected to the said spindles maintain their positions in relation to the tensioning device during the adjust-ing process. The slotted tube also achieves compulsory opening of the syindles, so that the latter are adjusted simultaneously in opposite directions under all circumstances.
In the accompanying drawings, which illustrate exemplary embodiments of the present invention:
Figure 1 is a plan view of a tensioning device according to the invention, comprising pivotable hooks, a safety-sleeve, and a forked hinge-member;
Figure 2 is a section along the line I-[ in Figure l;
Figure 3 is a plan view of a variant of the releasable locking means, with pivotable hooks;
Figure 4 is a section along the line III-III in Figure 3;
Figure 5 is an enlarged view of point A in Figure 1, partly in section;
114~3L59f~
Figure 6 is an enlarged view of point B in Figure 2, partly in section;
Figure 7 is a plan view of another variant of the locking means, with a spring-loaded support-piece;
Figure 8 is a section along the line VII-VII in Figure 7, with an adjoining tensioning device having a ratchet;
Figure 9 is a side elevation in direction C according to Figure 7 and is fou~d~on t~e $ame sheet as Figure 7;
Figure 10 is a vertical section through the built-in ratchet;
Figure 11 is a longitudinal section through another variant of the tensioning device;
Figure 12 is a section along the line XI-XI in Figure 11.
Referring to the drawings, and particularly to Figures 1 and 2, the tensioning device has two spindles 13, each having a self-locking thread 22. The threads are right and left-hand on the respective spindles. The two spindles 13 are mounted in a double nut 6. Tensioning is effected by means of serrated hand-tube 10, permitting the transfer of a force of about 4000 N.
For larger preload forces, a ratchet, to be described hereinafter, replaces the tube 10, see Figure 8. A tensioning stoke of up to 75 mm to right and ZO left is provided by rotating tube 10. Tube 10 is secured to double nut 6 by means of a locking pin 11. The rota-l~ motion for tensioning the device is indicated by a mark "ON" or the like made on tube 10. A tube 5 protects spindles 13 from dust and dirt. Numeral 21 indicates a stop pin.
All parts of the tensioning device are rsplaceable and above all maintenance-free. Parts in direct engagement with outside parts are heat-treated to promote wear-resistance. The tensioning device is reliable even when dirty and covered with dust. The material used may be 16 ~fn Cr 5.
The tensioning device has, at one end, a pivotable hook 1. The ~14159~Z
opening for the accommodatlon of the chain, formed by this hook, is bridged by lever 2. Hook 1 is arranged between the two parallel freely projecting legs of a forked connector 3 and is adapted to pivot about the axis of a pin 4.
The configuration of hook 1 is such that a moment arm x is formed between axis 4 of rotation of hook 1 and the line of action of the force exerted by a chain 16 on the hook, i.e. the tension of the chain must be applied eccentrically with respect to the pin 4. The moment produced acts in a direct-ion tending to open the hook 1. This configuration of the hook leads to faster unlocking. After the locking means of pivotable hook 1 has been released the latter pivots downwardly and thus immediately releases the chain. This release of the chain is assisted by the eccentric point of application of the chain tension in hook 1. Rapid and easy unlocking is thus assured.
As shown in Figures 1 and 2, lever 2 also pivots about the pin 4 but it may also be rigidly attached. The lever 2 consists of two parts adjoining the legs of forked connector 3 and lying in the plane of those legs. It may be straight or curved in a direction opposite to that of hook 1.
What is important is that the opening formed by hook 1, for the accommodation of the chain, be bridged. When curved, lever 2 forms a ring with hook 1, as shown in Figure 2.
As shown in Figures 3 and 4, the two parallel legs of forked connector 3 may be bent obliquely upwards, thus bridging the opening formed by hook l for the accommodation of the chain. In this case, the bent legs serve as a rigid lever 2 and the free end of pivotable hook 1 is connected detachably to the said lever. Any suitable means of attachment may be used for this detachable connection. In the example in question, use is made of a locking pin 1~. As may be gathered from Figures 3 and 4, the hinged members may be incorporated alone, without any tensioning device, as independent elements 114~S9Z
in$o the tie-down system.
I`t is also possible, to lock the pivotable hook without loading the lever 2. To this end, hook 1 is extended beyond pin 4 and the extended port-ion is locked to the tensioning device - Figure 2. This locking is effected by means of a sliding sleeve 7 mounted displaceably upon the said tensioning device. With hook 1 in the locked position, sleeve 7 is pushed over the end of the extension of hook 1. ~his end of hook 1 has a recess in which a correspondingly designed part of sliding sleeve 7 is engaged. Since the sleeve 7 is displaceable upon the tensioning device, recess 15 in hook 1 must run parallel, or almost parallel, with the outer wall of the tensioning device. Sleeve 7 is mounted upon a compressi~n-spring 9. Spring clips 8 retain the sleeve 7 and spring 9 on the tube 5. Rapid unlocking is achieved merely by pushing sleeve 7 back. This releases the extension of pivotable hook 1, allowing the latter to pivot downwardly under the load. This releases chain 16 and the tie-down point.
According to Figures 1 and 2, forked connection 3 and forked hinge-member 3' are located at the ends of the tensioning device and are displaceable in relation to each other. Locking pin 12 in hinge-member 3' allows chain 16 to be roughly shortened very rapid]y. As may be gathered from Figures 5 and 6, pin 12 may be secured in forked hinge-member 3', preferably by two balls 17 acted upon by compression springs. Each ball 17 has a compression spring 18 mounted in a guide 20 accessible from the outside. Suitable counter-pressure causes the said balls to move in the direction of spring-guide 20, thus allowing locking pin 12 to be inserted into the aligned apertures in the paral-lel legs of forked hinge-member 3'. If the counter-pressure acting upon balls 17 ceases or is reduced, compression springs 18 cause a part of the surface of each ball to project out of ~pring-guide 20. The projecting parts of the balls engage in corresponding recesses in pin 12. A spring-loaded ball 17 is ~14~59Z
preferably provided in each leg of hinge-member 3', to ensure that the said pin does not inadvertently fall out. Appropriate tension applied to pin 12 forces the balls back in the direction of spring-guide 20, provided that the said tension is greater than the force of the springs.
Spring-guide 20 is preferably at an angle of 45 to the axis of pin 12. In order to facilitate introduction, the diameter of pin 12 is somewhat smaller than that of the apertures provided for the accommodation thereof. Play 14 therefore remains between the walls of the said apertures and the pin.
As already indicated, the tensioning device with the hand-tube 10~
illustrated in Figures 1 and 2, is suitable for small preload forces of up to about 4000 N. For larger preloads, it is preferable to use a ratchet 23.
As may be gathered from Figure 8, the ratchet is arranged centrally of the tensioning device. It has hitherto been usual to use tommy-bars for large tensioning forces. However, in contrast to ratchets, tommy-bars can be used only when enough room is available to rotating the tensioning device. Ratchet-bar 24 is arranged to fold and has a detent arrangement ~not shown). If the said bar were to project, there would be a danger of injury and tripping.
The tension achieved is maintained by a locking means 29.
The quick-release mechanism arranged at one end of the tensioning device comprises a spring-loaded element 25 which is free to pivot in all directions. One end of spring 26 thereof is guided upon a stud 27 fitted to end-plate 28 of the tensioning device. The other end of the said spring is accommodated in a recess in element 25. Fitted to the other end of the tensioning device is the forked hinge-member 3' described above.
The tensioning device according to Figures 11 and 12 has two spindles 13a with right and left-hand threads respectively. A double nut 6a is mounted on each spindle, preferably by means of a threaded bush 30. Part of the length ~14~59Z
of the double nut is covered with a hand-tube lOa which is prevented from rotating, in relation to the said double nut, by a locking pin lla. In the area between the two bushes 30, spindles 13a are surrounded by tubes 31 loc-ated between the spindles and double nut. Tubes 31 are spaced from spindles 13a and bear against the inner walls of the said double nuts. Each of the spindles is provided near the end facing the other spindle, with a guide-pin 32 engaging in a slot 33 running lengthwise of tube 31.
Rotating hand-tube lOa causes the double nuts and, through threaded bushes 30, the two spindles 13a, to move simultaneously in opposite directions.
Since the said spindles are guided by pins 32 in slots 33, this produces very uniform simultaneous adjustment of the spindles. This guidance also prevents the spindles from rotating about their axes, and thus prevents the hinge-members ~Figures 1 and 2), which are secured thereto, from being rotated.
Claims (28)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A tensioning device that fulfills three functions including a coarse shortening of a chain, a tensioning thereof and a rapid opening thereof, especially for lashing chains having chain links in a chain strand of chain members, which comprises in combination: a housing, a double nut rotatably journalled over a part of the length thereof being protected in said housing, two link members for receiving chain links, at least one link member having a receiving opening in which at least substantially each chain member of the chain strand can be connected, said link members being movable relative to one another and having a releasable latch means including a securing member associated with the receiving opening of at least one link member with which a chain member located in the receiving opening is to be secured, said securing member being mounted at least partially yieldably shiftable in a released position as journalled on the tensioning device, at least one of said link members having a fork-like shape with two freely projecting legs which extend parallel to one another and are interconnected by a transverse piece, said link members being adapted to be held in a closure position under tension, with at least one link member, under the force of a connected tensioned chain, being adpated to be movable rapidly into a release position, two spindles with a left thread and a right thread journalled in said double nut so that said spindles simultaneously can be adjusted oppositely relative to each other with said double nut including both tensioning and coarse shortening therewith, without any additional auxiliary tools, and an actuating element rigidly connected upon said double nut for rotation of said double nut, said spindles projecting with ends thereof away from each other out of said double nut and being provided at these ends with a connection link member providing one receiving opening for the chain member.
2. A tensioning device in combination according to claim 1, which includes said double nut and said two spindles journalled in said double nut for movement of said link members, each of said spindles having a self-binding left and right thread.
3. A tensioning device in combination according to claim 2, which includes a pivotal hook, which serves as one of said link members and is adapted to form a suspension opening, and also includes a bracket adapted to bridge said suspension opening.
4. A tensioning device in combination according to claim 3, in which said hook has a free end releasably connectible to said bracket.
5. A tensioning device in combination according to claim 4, in which the shape of said hook is such that a lever arm is formed between the pivot point of said hook and the point of engagement of a chain in said hook.
6. A tensioning device in combination according to claim 5, which includes a fork connection having two freely projecting parallel legs, said hook being arranged between said legs.
7. A tensioning device in combination according to claim 6, in which said bracket comprises two parts respectively located in the plane of the legs of said fork connection.
8. A tensioning device in combination according to claim 7, in which said hook and said bracket are pivotally journalled about a common axis.
9. A tensioning device in combination according to claim 8, in which said hook and said bracket are adapted to form a ring in their closed condition.
10. A tensioning device in combination according to claim 7, in which said two legs of said fork connection are angled off at an upward incline to form said bracket and, as such, to bridge said suspension opening of said hook.
11. A tensioning device in combination according to claim 9, in which said hook is adapted to extend beyond the pivot axis thereof.
12. A tensioning device in combination according to claim 11, in which said hook extension is adapted to be arrested.
13. A tensioning device in combination according to claim 12, in which said hook extension terminates upon the outer wall of said tensioning device.
14. A tensioning device in combination according to claim 13, which includes a slide sleeve displaceably journalled thereon for arresting said hook extension.
15. A tensioning device in combination according to claim 14, which includes a pressure spring, said slide sleeve being journalled upon said pressure spring.
16. A tensioning device in combination according to claim 15, in which said slide sleeve, in the arrested condition of said hook, is adapted to be shifted over the end of said hook extension.
17. A tensioning device in combination according to claim 16, in which the end of said hook extension is provided with a profile over which a correspondingly embodied part of said slide sleeve is engageable.
18. A tensioning device in combination according to claim 1, in which said transverse piece is formed by a locking bolt which is securely clamp-able in said fork-like link member by at least one pressure tensioned ball.
19. A tensioning device in combination according to claim 1, which includes a centrally arranged ratchet which is simultaneously provided with a built-on shortening loop.
20. A tensioning device in combination according to claim 19, which includes a reversibly arranged ratchet crossbar.
21. A tensioning device in combination according to claim 19, which includes a spring loaded engagement piece which is associated with one of said link members.
22. A tensioning device in combination according to claim 21, in which said engagement piece is adapted to be guided freely movable in all directions.
23. A tensioning device in combination according to claim 22, which includes a bolt stud, a recess in said engagement piece, and a pressure spring, one side of which is guided on said bolt stud, and the other side of which is fastened in said recess.
24. A tensioning device in combination according to claim 23, which includes an end termination plate, said bolt stud being fastened on said termination plate.
25. A tensioning device, especially for lashing chains, which com-prises two link members for receiving chain links, said link members being movable relative to one another and having a releasable latch, at least one of said link members having a fork-like shape with two freely projecting legs which extend parallel to one another and are interconnected by a trans-verse piece, said link members being adapted to be held in a closure position under tension, with at least one link member, wider the force of a connected tensioned chain, being adapted to be movable into a release position, said transverse piece being formed by a locking bolt which is securely clampable in said fork-like link member by at least one pressure tensioned ball, and for each said ball there is included a spring guide which is accessible from the outside, and a pressure spring journalled in said spring guide.
26. A tensioning device according to claim 25, in which each of said spring guides is inclined by 45° to the axis of said locking bolt.
27. A tensioning device according to claim 26, which includes a bore in said link member for receiving said locking bolt, the diameter of said locking bolt being smaller than the diameter of said bore.
28. A tensioning device according to claim 27, in which each leg of said fork-like link member contains a ball which is subject to pressure-spring tensioning.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2855988.8 | 1978-12-23 | ||
| DE19782855988 DE2855988A1 (en) | 1978-12-23 | 1978-12-23 | TENSIONER, ESPECIALLY FOR LASHING CHAINS |
| DE19792920896 DE2920896A1 (en) | 1979-05-23 | 1979-05-23 | Combined tensioner and fastener for lashing chain - uses forked eyelet accommodating axle pins of hook arms with release pivoting of hooked segment promoted by chain tension |
| DEP2920896.6 | 1979-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1141592A true CA1141592A (en) | 1983-02-22 |
Family
ID=25777052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000342470A Expired CA1141592A (en) | 1978-12-23 | 1979-12-21 | Tensioning device, especially for tie-down chains |
Country Status (10)
| Country | Link |
|---|---|
| AT (1) | AT379775B (en) |
| BR (1) | BR7908471A (en) |
| CA (1) | CA1141592A (en) |
| FR (1) | FR2444857B1 (en) |
| GB (1) | GB2041441B (en) |
| IT (1) | IT1127718B (en) |
| NL (1) | NL188538C (en) |
| NO (1) | NO151719C (en) |
| SE (1) | SE426461B (en) |
| YU (1) | YU309479A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3142474A1 (en) * | 1981-10-27 | 1983-05-05 | Eisen-und Drahtwerk Erlau AG, 7080 Aalen | TENSIONER, ESPECIALLY FOR LASHING CHAINS |
| GB8530599D0 (en) * | 1985-12-12 | 1986-01-22 | Rapid 173 Ltd | Lashing system |
| DE19529704C1 (en) * | 1995-06-21 | 1997-01-30 | Robert Heggemann | Quick release device, in particular for use in abseiling |
| SE9603322L (en) * | 1996-09-12 | 1997-06-23 | All Set Marine Lashing Ab | Screws and the use of such as a lashing rod to acid load |
| DE10261703B4 (en) * | 2002-12-30 | 2005-10-20 | Juergen Freigeber | Turnbuckle for lashing loads on vehicles |
| FI119418B (en) | 2004-12-30 | 2008-11-14 | Outotec Oyj | Trench for casting molten copper |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE284065C (en) * | ||||
| US1393614A (en) * | 1921-02-04 | 1921-10-11 | Ferragamo Salvatore | Turnbuckle |
| US1500204A (en) * | 1921-07-19 | 1924-07-08 | Richard Anthony Henry | Tie-rod tightener and puller for concrete forms |
| US1971472A (en) * | 1932-02-27 | 1934-08-28 | Wolf Charles | Steamboat ratchet |
| US2227609A (en) * | 1939-09-12 | 1941-01-07 | Blaw Knox Co | Tensioning device for guy lines |
| US2220288A (en) * | 1940-06-24 | 1940-11-05 | Blaw Knox Co | Steamboat ratchet |
| FR974881A (en) * | 1947-11-13 | 1951-02-27 | Aerolex Ltd | Improvements to cable ties |
| US3081116A (en) * | 1960-04-11 | 1963-03-12 | Voi Shan Ind Inc | Turnbuckle |
| DE1196430B (en) * | 1963-03-27 | 1965-07-08 | Tobias Hansen | Turnbuckle |
| US3584835A (en) * | 1969-06-30 | 1971-06-15 | Aeroquip Corp | Tensioning device |
| US4130269A (en) * | 1978-02-07 | 1978-12-19 | Columbus Mckinnon Corporation | Telescopic turnbuckle |
-
1979
- 1979-12-14 NL NLAANVRAGE7909049,A patent/NL188538C/en not_active IP Right Cessation
- 1979-12-17 IT IT28054/79A patent/IT1127718B/en active
- 1979-12-18 YU YU03094/79A patent/YU309479A/en unknown
- 1979-12-19 AT AT0800579A patent/AT379775B/en not_active IP Right Cessation
- 1979-12-20 SE SE7910559A patent/SE426461B/en not_active IP Right Cessation
- 1979-12-20 NO NO794211A patent/NO151719C/en unknown
- 1979-12-20 FR FR7931319A patent/FR2444857B1/en not_active Expired
- 1979-12-21 CA CA000342470A patent/CA1141592A/en not_active Expired
- 1979-12-21 BR BR7908471A patent/BR7908471A/en not_active IP Right Cessation
- 1979-12-24 GB GB7944381A patent/GB2041441B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| YU309479A (en) | 1983-01-21 |
| NO151719B (en) | 1985-02-11 |
| FR2444857B1 (en) | 1985-11-22 |
| NL7909049A (en) | 1980-06-25 |
| GB2041441B (en) | 1982-10-20 |
| GB2041441A (en) | 1980-09-10 |
| AT379775B (en) | 1986-02-25 |
| NL188538C (en) | 1992-07-16 |
| FR2444857A1 (en) | 1980-07-18 |
| NL188538B (en) | 1992-02-17 |
| NO151719C (en) | 1985-05-22 |
| SE426461B (en) | 1983-01-24 |
| BR7908471A (en) | 1980-07-22 |
| NO794211L (en) | 1980-06-24 |
| ATA800579A (en) | 1985-07-15 |
| IT7928054A0 (en) | 1979-12-17 |
| IT1127718B (en) | 1986-05-21 |
| SE7910559L (en) | 1980-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |