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EP1892360A1 - Federbruchsicherung - Google Patents

Federbruchsicherung Download PDF

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Publication number
EP1892360A1
EP1892360A1 EP07114733A EP07114733A EP1892360A1 EP 1892360 A1 EP1892360 A1 EP 1892360A1 EP 07114733 A EP07114733 A EP 07114733A EP 07114733 A EP07114733 A EP 07114733A EP 1892360 A1 EP1892360 A1 EP 1892360A1
Authority
EP
European Patent Office
Prior art keywords
pawl
spring
balancing
protection mechanism
break protection
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.)
Withdrawn
Application number
EP07114733A
Other languages
English (en)
French (fr)
Inventor
Johannes Cornelis Nieuwlaat
Antonius Johannes Peterse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flexi Force BV
Original Assignee
Flexi Force BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Flexi Force BV filed Critical Flexi Force BV
Publication of EP1892360A1 publication Critical patent/EP1892360A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/10—Counterbalance devices
    • E05D13/12—Counterbalance devices with springs
    • E05D13/1253—Counterbalance devices with springs with canted-coil torsion springs
    • E05D13/1269—Spring safety devices
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/003—Anti-dropping devices
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/67—Materials; Strength alteration thereof
    • E05Y2800/684—Strength alteration by weakening, e.g. by applying grooves
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/106—Application of doors, windows, wings or fittings thereof for buildings or parts thereof for garages

Definitions

  • a spring break protection mechanism (“drop catch mechanism”) comprises a base plate with a pawl pivotably attached thereto, which is coupled to an input member for cooperation with a balancing spring, further comprising a ratchet wheel for attachment to a balancing axle, while the pawl is pivotable between a first position, in which the ratchet wheel is free-running and a second position in which the pawl blocks the ratchet wheel, and wherein the pawl is biased by an operating spring to the second position against the force of the balancing spring.
  • Sectional doors or overhead doors are much used in industrial as well as in residential uses.
  • sectional doors have a door leaf that is composed of a number of segments interconnected so as to be pivotable relative to a substantially horizontal axis.
  • the door leaf is coupled, at the upstanding sides, to a hoisting means, for instance a hoisting cable with which the door is raised or lowered.
  • the hoisting means cooperate with a balancing device for compensating the weight of the door segments suspended from the hoisting means.
  • the balancing device comprises a balancing spring for compensating the weight of the door segments.
  • the balancing device further comprises a balancing axle which extends at the top of a doorway between the two sides of the doorway.
  • the balancing axle and the balancing spring are typically connected to the fixed world via a spring break protection mechanism.
  • the fixed world may be a wall of the doorway.
  • Such a spring break protection mechanism is known from, for instance, EP 1 213 428 and WO 2006/017931 .
  • the pawl of the spring break protection mechanism is biased for blocking rotation of the ratchet wheel as soon as the compensating force of the balancing spring drops out.
  • the falling door leaf exerts great forces on the spring break protection mechanism.
  • these spring break protection mechanisms are of relatively heavy design. As a result, such a spring break protection mechanism is relatively expensive.
  • the known spring break protection mechanisms are relatively complex, have many parts and are, consequently, difficult to assemble and to mount, which increases the risk of mistakes during mounting.
  • the invention contemplates a spring break protection, with which the drawbacks mentioned can be prevented while maintaining the advantages.
  • the invention provides a spring break protection mechanism according to claim 1, and a sectional door system with spring break protection according to claim 13.
  • the spring break protection mechanism or sectional door system By providing the spring break protection mechanism or sectional door system with a structural part having an intentional weakening which is constructed to plastically deform in a controlled manner in the second position when a predetermined threshold value of the blocking force to be transmitted is exceeded, while, always, the blocking function of the mechanism is maintained, the remaining parts of the construction can be of less heavy design. As a result, the remaining parts of the spring break protection can be of less heavy design so that cutbacks on weight and costs can be realized.
  • the structural part comprises the pawl of the spring break protection mechanism, while, at the location of the weakening involved, the pawl comprises a crumple zone.
  • the crumple zone can be designed as a predefined area in the structural part, with a different choice in material and/or form and/or construction than other areas in the structural part.
  • the threshold value of the blocking force to be transmitted is defined by the choice in material and/or form and/or construction of the crumple zone in the structural part.
  • the mechanism in which the structural part with the crumple zone is located maintains the blocking function upon plastic deformation of the crumple zone.
  • the base plate to which the pawl is pivotably connected preferably also comprises a stop that defines an extreme position of the pawl in the second position.
  • the pawl is coupled to the input member via a coupling mechanism.
  • the input member cooperates, via a coil plug, with the balancing spring.
  • the input member may be designed as two distancing bushes which are mounted on the base plate of the spring break protection mechanism. Via the input member, the force of the balancing spring of the spring break protection mechanism is supplied.
  • the coupling mechanism can be designed as a slot or a recess in the pawl. Via the slot and the recess in the pawl, the input member is coupled to the pawl. Due to the force of the balancing spring dropping out, the input member uncouples from the recess in the pawl, and the input member moves upwards in the slot and consequently releases the pawl from the first position. As a result, the pawl moves, under the force of the operating spring, to the second position.
  • an elegant and simple spring break protection mechanism is realized. As a result, fewer parts are necessary, rendering the spring break protection mechanism easier to mount.
  • the invention further relates to a sectional door provided with a spring break protection mechanism and to a kit of parts for assembling a spring break protection mechanism.
  • Fig. 1 shows a spring break protection mechanism 1 for preventing the sectional door from dropping down when the force of the balancing spring drops out.
  • the spring break protection mechanism 1 comprises a base plate 2 with a pawl 3 pivotably connected thereto.
  • the base plate 2 is attached to the fixed world, for instance to a wall.
  • the pawl 3 is attached, via a pawl axle 8, to the base plate 2 and is pivotable relative to the pawl axle 8, about the pivot 20.
  • the pawl 3 is coupled via a coupling mechanism 4, to an input member 5.
  • the input member 5 cooperates, via a coil plug (not shown), with a balancing spring (not shown either here).
  • the balancing spring is usually designed as a torsion spring.
  • the input member 5 is designed as a distancing bush.
  • the coupling mechanism 4 comprises a slot 19 in the base plate 2 and a recess 9 in the pawl 3.
  • the spring break protection mechanism 1 further comprises a ratchet wheel 6 for cooperation with a balancing axle (not shown either).
  • the ratchet wheel 6 is provided with a connecting projection extending towards the balancing axle. With the spring break protection mechanism 1 in mounted condition, this connecting projection 13 cooperates with a slot recessed in the balancing axle. As a result, the ratchet wheel 6 is secured against rotation with the balancing axle.
  • the pawl 3 is pivotable between a first position I, as shown in Fig. 2 and a second position II, as shown in Fig. 3. In the first position I, the ratchet wheel is free-running and, in the second position II, the pawl 3 blocks the ratchet wheel.
  • the pawl 3 In the first position I, the pawl 3 is biased by an operating spring 7 shown in Fig. 1, to the second position II against the force of the balancing spring.
  • the operating spring 7 is detachably connected to the base plate 2 and to the pawl 3. At one end, the operating spring 7 is placed in an opening intended thereto in the base plate 2, in this exemplary embodiment pivot 20, and, at another end, the operating spring 7 is placed in an opening in the pawl 3. This simplifies the mounting of the operating spring 7.
  • the ratchet wheel 6 is free-running.
  • the balancing spring exerts a force on the input member 5. Due to the force of the balancing spring, the input member 5 is located on the side of the slot 9 where the pawl 3 is located. In this exemplary embodiment, the pawl 3 is coupled to the input member 5 by means of slot 19 and recess 9. Due to the force the balancing spring exerts on the input member 5 and which the input member 5 exerts, in turn, on the pawl 3, the pawl 3 remains coupled to the input member 5 by means of the recess 9.
  • the pawl 3 Upon breakage of the balancing spring, the force exerted on the input member 5 drops out, and the input member 5 will uncouple from the recess 9 and will pivot in the slot 19 in a direction away from the pawl 3. As a result, the pawl 3 is no longer coupled to the input member 5 and, owing to the bias of the operating spring 7, the pawl 3 will pivot to the second position II. In the second position II, the pawl 3 blocks the ratchet wheel 6, as shown in Fig. 3. As the ratchet wheel 6 is secured against rotation with the balancing axle, the rotation of the balancing axle is blocked too and, consequently, the sectional door is prevented from dropping down.
  • the pawl 3 engages an engagement surface 10 of the ratchet wheel 6.
  • the engagement surface 10 is provided with a number of projections 11, behind which the pawl 3 can be caught.
  • the pawl 3 is provided with a crumple zone 12 which plastically deforms in the second position II from a predetermined threshold value of a blocking force.
  • a predetermined threshold value of a blocking force Through the use of the crumple zone 12, there is a predefined area of the pawl 3 that can plastically deform in a controlled manner, that is, from a predetermined threshold value of the blocking force exerted by the falling door. The blocking force is produced by the weight of the dropping door leaf.
  • the pawl 3 has a smaller cross section at the location of the crumple zone 12. Through the use of the locally reduced cross section in the pawl 3, thus, an area is defined where plastic deformation is allowed from a predetermined threshold value.
  • the crumple zone 12 can be designed by providing the pawl 3 locally with a different material, in particular a material with a lower yield point than the remaining material of the pawl 3.
  • the threshold value of the blocking force to be transmitted is defined by the choice of material and/or form and/or construction of the pawl 3 and can be adapted to, for instance, the weight of a segment of the sectional door.
  • the base plate 2 comprises a stop 14 that defines a farthest position of the pawl 3 in the second position II.
  • Fig. 3 it can be seen that although the pawl 3 blocks the ratchet wheel, it does not yet abut against the stop 14. With a great blocking force, the stop 14 serves to prevent plastic deformation of the pawl 3 at the location of the crumple zone 12 occurring to such an extent that the pawl would rush past the ratchet wheel 6 and were to thus release the blocking of the ratchet wheel 6 again.
  • the pawl 3 blocks the ratchet wheel 6 in the second position II.
  • the ratchet wheel 6 is provided with a flange edge 15.
  • the pawl 3 engages the engaging surface 10 which, in mounted condition, is confined between the base plate 2 and the flange edge 15.
  • the pawl 3 can engage the engaging surface 10, in the second position II, and the pawl 3 is prevented from rushing past the ratchet wheel 6 through plastic deformation of the crumple zone 12.
  • the spring break protection mechanism 1 comprises a bearing 16 as shown in Fig. 1.
  • the bearing 16 is connected to the base plate 2 for support of the balancing axle.
  • the ratchet wheel 6 is fixedly attached to the bearing 16 via an attachment, for instance a pin.
  • the ratchet wheel 6 can be axially fixed relative to the mechanism, and is axially slideable relative to the balancing axle. This means that in spite of axial displacement of the balancing axle, the axial position of the ratchet wheel 6 remains unchanged.
  • the pawl 3 and the ratchet wheel 6 are each time substantially in the same plane and, in the second position II, the pawl 3 will engage the engaging surface 10 of the ratchet wheel 6.
  • the spring break protection mechanism 1 also comprises a switch 17 for detecting the position of the pawl 3.
  • the switch 17 is activated when the pawl 3 is pivoted from the first position I to the second position II.
  • the signal of the switch 17 is transmitted to an electric motor which drives the sectional door, for switching off the second motor after a breakage of the balancing spring.
  • Fig. 1 it can be seen that the slot 19 and the recess 9 of the coupling mechanism 4 are in the proximity of the operating means of the pawl 3.
  • the operating means comprise the operating spring 7 and the pawl axle 8.
  • the pawl axle 8 In mounted condition, the pawl axle 8 is located in a pivot 20 about which the pawl 3 can pivot.
  • the operating spring 7 is also located around this pivot 20.
  • the base plate 2 is provided on one side with two side-by-side openings 18 for cooperation with the input member 5.
  • the input member 5 is placed in one of the two openings.
  • the base plate 2 is suitable for use with different balancing devices with a different distance between the parts of the input member 5. This renders the base plate 2 suitable for sectional doors of different weight categories.
  • the input member 5 is thus coupled to the base plate 2 by means of an opening 18 on one side of the base plate 2 and a slot 19 on an opposite side of the base plate 2.
  • Fig. 4 shows a view of a sectional door system.
  • the sectional door system 21 comprises a door leaf composed of pivotably interconnected segments 22.
  • the system 21 also comprises a balancing device 24 for compensating the weight of a door segment 22.
  • the balancing device 24 comprises a balancing axle 34 and a balancing spring 25 for cooperation with an input member of a spring break protection mechanism 1.
  • the sectional door system also comprises a hoisting mechanism 26 with a carrier frame 27.
  • the carrier frame 27 is provided with guide profiles 28 in which guide rollers run (not show here), attached to the door segments.
  • the hoisting mechanism comprises the hoisting cables 29.
  • the hoisting cables are wound on a cable reel 30 and returned via a return pulley 31.
  • the sectional door system 21 further comprises an end post 32 and a floor bracket 33.
  • a balancing spring Upon breakage of a balancing spring, the pawl 3 will move towards the second position. The plastic deformation at the location of the intentional weakening in the structural part will absorb the blocking force to a large extent.
  • the weakening or crumple zone can be realized in many manners, for instance by a combination of choice of material and/or construction and/or form of the pawl.
  • Many forms of the pawl are possible, for instance, the pawl can be designed as a bow attached at both ends to the parts of the input member and provided with a tooth that can engage the ratchet wheel.
  • the pawl can be designed with a smaller cross section and/or a thinner thickness, or the material of the pawl can be locally weakened in another manner, by using, for instance, grooves or holes, or by using a different material.
  • the engaging surface of the ratchet wheel can be designed differently than with projections, for instance with a rough surface so that the pawl blocks the ratchet wheel by means of friction. Also, several openings in the base plate or even a slot for receiving the input member are possible.
  • the ratchet wheel can be fastened to the bearing via a pin, however, other fastenings are possible too, such as for instance a clamping coupling or a secured screw connection.
  • the bearing and the pawl can also be manufactured in one piece.
  • a spring break protection mechanism 1 according to the preamble of claim 1, wherein the ratchet wheel is fastened to the bearing, can also be considered as an invention.
  • a spring break protection mechanism according to the preamble of claim 1, wherein the ratchet wheel is attached to the balancing axle so as to be axially slideable, can also be considered as an invention.
  • a spring break protection mechanism according to the preamble of claim 1 can be considered wherein the coupling mechanism and the operating means of the pawl are arranged on the base plate on the same side of the opening for the balancing axle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
EP07114733A 2006-08-22 2007-08-22 Federbruchsicherung Withdrawn EP1892360A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1032353A NL1032353C2 (nl) 2006-08-22 2006-08-22 Veerbreukbeveiliging.

Publications (1)

Publication Number Publication Date
EP1892360A1 true EP1892360A1 (de) 2008-02-27

Family

ID=37908364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07114733A Withdrawn EP1892360A1 (de) 2006-08-22 2007-08-22 Federbruchsicherung

Country Status (2)

Country Link
EP (1) EP1892360A1 (de)
NL (1) NL1032353C2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8347824B2 (en) 2010-06-24 2013-01-08 David Christopher Marshall Combination retractable leash assembly and wearable locket for companion pet
US11767696B2 (en) 2017-08-04 2023-09-26 Assa Abloy Entrance Systems Assembly comprising a housing with a balancing spring break protection mechanism for a door system such as a sectional door system and a door system including the assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7507998A (nl) * 1974-07-19 1976-01-21 Neukirchen W U H Vangmechanisme aan een as van een rolluik, rolpoort, en dergelijke.
GB2050560A (en) * 1979-06-08 1981-01-07 Hoermann H A Device for the Balancing of a Gate or Door
EP0803626A1 (de) * 1996-04-25 1997-10-29 Cardo Door France Vorrichtung zum Heben einer vertikal beweglichen Tür
EP1213428A1 (de) * 2000-12-07 2002-06-12 Flexi-Force B.V. Absturzsicherung
US20030221801A1 (en) * 2002-03-19 2003-12-04 Canimex Inc. Safety braking device for garage doors and the like
US20060185800A1 (en) * 2002-03-19 2006-08-24 Canimex Inc. Brake device for garage doors and the like, and door assembly including the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7507998A (nl) * 1974-07-19 1976-01-21 Neukirchen W U H Vangmechanisme aan een as van een rolluik, rolpoort, en dergelijke.
GB2050560A (en) * 1979-06-08 1981-01-07 Hoermann H A Device for the Balancing of a Gate or Door
EP0803626A1 (de) * 1996-04-25 1997-10-29 Cardo Door France Vorrichtung zum Heben einer vertikal beweglichen Tür
EP1213428A1 (de) * 2000-12-07 2002-06-12 Flexi-Force B.V. Absturzsicherung
US20030221801A1 (en) * 2002-03-19 2003-12-04 Canimex Inc. Safety braking device for garage doors and the like
US20060185800A1 (en) * 2002-03-19 2006-08-24 Canimex Inc. Brake device for garage doors and the like, and door assembly including the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8347824B2 (en) 2010-06-24 2013-01-08 David Christopher Marshall Combination retractable leash assembly and wearable locket for companion pet
US11767696B2 (en) 2017-08-04 2023-09-26 Assa Abloy Entrance Systems Assembly comprising a housing with a balancing spring break protection mechanism for a door system such as a sectional door system and a door system including the assembly

Also Published As

Publication number Publication date
NL1032353C2 (nl) 2008-02-25

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