EP0586271B1 - Breakage safety device for rotary shaft - Google Patents

Breakage safety device for rotary shaft Download PDF

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Publication number
EP0586271B1
EP0586271B1 EP93401940A EP93401940A EP0586271B1 EP 0586271 B1 EP0586271 B1 EP 0586271B1 EP 93401940 A EP93401940 A EP 93401940A EP 93401940 A EP93401940 A EP 93401940A EP 0586271 B1 EP0586271 B1 EP 0586271B1
Authority
EP
European Patent Office
Prior art keywords
shaft
safety element
portions
curtain
falling
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
Application number
EP93401940A
Other languages
German (de)
French (fr)
Other versions
EP0586271A1 (en
Inventor
Bernard Kraeutler
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.)
Nergeco SA
Original Assignee
Nergeco SA
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 Nergeco SA filed Critical Nergeco SA
Publication of EP0586271A1 publication Critical patent/EP0586271A1/en
Application granted granted Critical
Publication of EP0586271B1 publication Critical patent/EP0586271B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/84—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic against dropping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/219—Guards
    • Y10T74/2191—Guards for rotary member

Definitions

  • the present invention relates to a rotary shaft provided with a safety device against breakage for a rotary shaft, and in particular a device having the purpose of stopping rotation and preventing the falling of the ruptured parts of the shaft.
  • he invention applies in particular to the winding shafts of doors with a lifting curtain.
  • Such a tree can directly wind a flexible curtain, canvas or plastic or can wind straps, which are used to raise a curtain, formed of rigid or flexible panels that can fold over the door.
  • the subject of the invention is a rotary shaft provided with a safety device against the rupture of a rotary shaft, to block the rotation of the shaft and prevent the falling of the broken parts, in particular for a strap winding shaft.
  • a safety device against the rupture of a rotary shaft to block the rotation of the shaft and prevent the falling of the broken parts, in particular for a strap winding shaft.
  • for lifting a lifting curtain if necessary for winding the curtain itself, comprising at least one safety element placed under the tree to prevent it from falling, the peripheral surface of the tree and the surface opposite said security element being provided with means such as reliefs cooperating to prevent the shaft from rotating when a part of the shaft descends on said security element following a rupture.
  • the support element is a stirrup enveloping the lower part of a section of the shaft, the interior of the stirrup being provided with reliefs, such as at least one rib, and the surface of the shaft being provided with reliefs, such as at least one longitudinal groove, capable of coming to cover said rib to lock on it.
  • the safety element is placed inside the tree, and the inner periphery of the tree has reliefs such that if the tree descends following a break, the safety element prevents it from falling and turning.
  • the shaft 1 formed in a hollow tube has, at least in certain places, over certain sections of its length, longitudinal grooves 2a, 2b, 2c, 2d, which normal operation does not occur.
  • safety elements which may be constituted by stirrups 3 furnished with at least one rib 4, for example in the lowest interior part of the stirrup .
  • the profiles of the grooves and ribs are provided to block the shaft if it comes to bear on the bottom of a stirrup. These reliefs will therefore be formed with sharp angles, of 90 ° for example.
  • the shaft could also be provided with ribs, in place of the grooves.
  • Figure 2 shows the same place in the tree 1 after rupture.
  • the tree collapses, no longer being continuous, and generally being held by joints at its ends.
  • the shaft is blocked in rotation. So, in the event of a break, nothing falls, and the broken shaft is immediately locked in rotation.
  • the tree can have the section shown over its entire length.
  • the security element may extend over the entire corresponding length, and may thus have the shape of a gutter. This provision may apply to trees on which the lifting straps are wound. A large part of the tree remains uncovered.
  • FIG. 3 represents a variant, in which the safety element is a rod 5 engaged inside the shaft 1 '.
  • the safety element is a rod 5 engaged inside the shaft 1 '.
  • Four notches 6a - 6d are formed in the inner periphery of the tree, in line with the rod 5. The latter has a section with sharp angles, so as to prevent the rotation of the tree if it comes to rest above.
  • the notches 6a - 6d could also be replaced by ribs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Burglar Alarm Systems (AREA)
  • Heat Treatment Of Articles (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Golf Clubs (AREA)

Abstract

A safety device used in case of rupture of a rotary shaft for preventing the shaft from rotating and for preventing broken portions thereof from falling, includes at least one safety element placed so as to retain the shaft to prevent it from falling. The peripheral surface of the shaft and a facing surface of the safety element are provided with mating devices that cooperate to prevent the shaft from rotating when a portion of the shaft is retained by said safety element due to the shaft rupturing. The device is particularly suitable for use with a shaft that winds up lifting straps for a raisable curtain or that winds up the curtain itself.

Description

La présente invention a pour objet un arbre rotatif pourvu d'un dispositif de sécurité contre la rupture pour arbre rotatif, et en particulier un dispositf ayant pour but de stopper la rotation et d'empêcher la chute des parties rompues de l'arbre.L'invention s'applique notamment aux arbres d'enroulement des portes à rideau relevable. Un tel arbre peut enrouler directement un rideau souple, en toile ou en plastique ou peut enrouler des sangles, qui servent à relever un rideau, formé de panneaux rigides ou souples qui peuvent se replier au-dessus de la porte.The present invention relates to a rotary shaft provided with a safety device against breakage for a rotary shaft, and in particular a device having the purpose of stopping rotation and preventing the falling of the ruptured parts of the shaft. he invention applies in particular to the winding shafts of doors with a lifting curtain. Such a tree can directly wind a flexible curtain, canvas or plastic or can wind straps, which are used to raise a curtain, formed of rigid or flexible panels that can fold over the door.

Ces portes utilisées dans les usines et les entrepots assurent souvent un service dans des conditions dures : plusieurs centaines, voire milliers de fonctionnements quotidiens, départ et arrêt brusques, interruptions brutales en cas d'incident, chocs, etc.. Il se produit des ruptures des arbres d'enroulement. Non seulement des éléments d'arbre cassé peuvent tomber au sol, ce qui est un premier danger, mais, un arbre étant rompu, un des morceaux n'est plus freiné et, tournant librement, va immanquablement laisser se dérouler les éléments de portes, tels que sangles ou rideaux qu'il a éventuellement emmagasinés, le rideau sera déroulé sur un côté, créant un nouveau danger de chute, et un risque de déchirure ou de dégradation de ce rideau.These doors used in factories and warehouses often provide a service in harsh conditions: several hundred, even thousands of daily operations, sudden start and stop, abrupt interruptions in the event of an incident, shocks, etc. There are ruptures winding trees. Not only broken tree elements can fall to the ground, which is a first danger, but, a tree being broken, one of the pieces is no longer braked and, turning freely, will inevitably let the door elements unfold, such as straps or curtains that it may have stored, the curtain will be unrolled on one side, creating a new danger of falling, and a risk of tearing or damaging this curtain.

L'invention a pour objet un arbre rotatif pourvu d'un dispositif de sécurité contre la rupture d'un arbre rotatif, pour bloquer la rotation de l'arbre et empêcher la chute des parties cassées, notamment pour un arbre d'enroulement de sangles de relevage d'un rideau relevable, le cas échéant d'enroulement du rideau lui-même, comportant au moins un élément de sécurrité placé sous l'arbre pour empêcher celui-ci de tomber, la surface périphérique de l'arbre et la surface en regard dudit élément de sécurité étant munis de moyens tels que des reliefs coopérant pour empêcher l'arbre de tourner quand une partie de l'arbre descend sur ledit élément de sécurité à la suite d'une rupture.The subject of the invention is a rotary shaft provided with a safety device against the rupture of a rotary shaft, to block the rotation of the shaft and prevent the falling of the broken parts, in particular for a strap winding shaft. for lifting a lifting curtain, if necessary for winding the curtain itself, comprising at least one safety element placed under the tree to prevent it from falling, the peripheral surface of the tree and the surface opposite said security element being provided with means such as reliefs cooperating to prevent the shaft from rotating when a part of the shaft descends on said security element following a rupture.

Dans un mode de réalisation, l'élément de support est un étrier enveloppant la partie inférieure d'une section de l'arbre, l'intérieur de l'étrier étant muni de reliefs, tels qu'au moins une nervure, et la surface de l'arbre étant munie de reliefs, tels qu'au moins une rainure longitudinale, susceptible de venir coiffer ladite nervure pour se bloquer dessus.In one embodiment, the support element is a stirrup enveloping the lower part of a section of the shaft, the interior of the stirrup being provided with reliefs, such as at least one rib, and the surface of the shaft being provided with reliefs, such as at least one longitudinal groove, capable of coming to cover said rib to lock on it.

Selon un autre mode de réalisation, l'élément de sécurité est placé à l'intérieur de l'arbre, et la périphérie intérieure de l'arbre comporte des reliefs tels que si l'arbre descend à la suite d'une rupture, l'élément de sécurité l'empêche de tomber et de tourner.According to another embodiment, the safety element is placed inside the tree, and the inner periphery of the tree has reliefs such that if the tree descends following a break, the safety element prevents it from falling and turning.

D'autres caractéristaques et avantages de l'invention apparaîtront au cours de la description qui va suivre, d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, en regard des dessins joints, et qui fera bien comprendre comment l'invention peut être réalisée.Other characteristics and advantages of the invention will appear during the description which follows, of an embodiment of the invention, given by way of nonlimiting example, with reference to the accompanying drawings, and which will do well understand how the invention can be realized.

Sur les dessins :

  • la figure 1 est une vue en coupe d'un mécanisme en fonctionnement comportant un arbre d'enroulement selon l'invention, au droit d'un élément de sécurité,
  • la figure 2 est une vue en coupe des mêmes éléments après rupture d'une porte à rideau relevable, et
  • la figure 3 est une vue en coupe d'une variante de réalisation.
In the drawings:
  • FIG. 1 is a sectional view of a mechanism in operation comprising a winding shaft according to the invention, in line with a safety element,
  • FIG. 2 is a sectional view of the same elements after breaking of a liftable curtain door, and
  • Figure 3 is a sectional view of an alternative embodiment.

Sur la figure 1, qui représente le mécanisme en fonctionnement, l'arbre 1, formé dans un tube creux comporte, au moins à certains endroits, sur certaines sections de sa longueur, des rainures longitudinales 2a, 2b, 2c, 2d, qui en fonctionnement normal n'interviennent pas. Aux endroits correspondants à ces reliefs, on dispose en dessous de l'arbre, des éléments de sécurité qui peuvent être constitués par des étriers 3 garnis d'au moins une nervure 4, par exemple dans la partie intérieure la plus basse de l'étrier. Les profils des rainures et des nervures sont prévus pour bloquer l'arbre si celui-ci vient en appui sur le fond d'un étrier. On formera donc ces reliefs avec des angles nets, de 90° par exemple. L'arbre pourrait aussi être muni de nervures, à la place des rainures.In FIG. 1, which represents the mechanism in operation, the shaft 1, formed in a hollow tube has, at least in certain places, over certain sections of its length, longitudinal grooves 2a, 2b, 2c, 2d, which normal operation does not occur. At the places corresponding to these reliefs, there are below the shaft, safety elements which may be constituted by stirrups 3 furnished with at least one rib 4, for example in the lowest interior part of the stirrup . The profiles of the grooves and ribs are provided to block the shaft if it comes to bear on the bottom of a stirrup. These reliefs will therefore be formed with sharp angles, of 90 ° for example. The shaft could also be provided with ribs, in place of the grooves.

La figure 2 représente le même endroit de l'arbre 1 après rupture. L'arbre s'affaisse, n'étant plus continu, et étant généralement tenu par des joints à ses extrémités. On voit clairement sur le dessin que l'arbre brisé ne tombe pas, il est supporté par l'étrier, fixé lui-même au bati de la porte. En outre, l'arbre est bloqué en rotation. Donc, en cas de rupture, rien ne tombe, et l'arbre brisé est aussitôt bloqué en rotation.Figure 2 shows the same place in the tree 1 after rupture. The tree collapses, no longer being continuous, and generally being held by joints at its ends. We can clearly see in the drawing that the broken tree does not fall, it is supported by the stirrup, itself fixed to the door frame. In addition, the shaft is blocked in rotation. So, in the event of a break, nothing falls, and the broken shaft is immediately locked in rotation.

L'arbre peut présenter la section représentée sur toute sa longueur.The tree can have the section shown over its entire length.

L'élément de sécurité pourra s'étendre sur toute la longueur correspondante, et pourra ainsi présenter la forme d'une gouttière. Cette disposition pourra s'appliquer aux arbres sur lesquels s'enroulent des sangles de relevage. Une grande partie de l'arbre reste découverte.The security element may extend over the entire corresponding length, and may thus have the shape of a gutter. This provision may apply to trees on which the lifting straps are wound. A large part of the tree remains uncovered.

Dans le cas où le rideau s'enroule lui-même sur l'arbre, les dispositions de sécurité décrites ci-dessus ne seront appliquées qu'aux extrémités de l'arbre, en dehors de la zone sur laquelle s'enroule le rideau. Dans ce dernier cas, d'autres formes de réalisation sont possibles.In the case where the curtain rolls up itself on the tree, the safety measures described above will only be applied at the ends of the tree, outside the area on which the curtain is rolled up. In the latter case, other embodiments are possible.

La figure 3 représente une variante, dans laquelle l'élément de sécurité est une tige 5 engagée à l'intérieur de l'arbre 1'. Quatre encoches 6a - 6d sont formées dans la périphérie intérieure de l'arbre, au droit de la tige 5. Celle-ci présente une section avec des angles nets, de façon à empêcher la rotation de l'arbre s'il vient à reposer dessus. Les encoches 6a - 6d pourraient aussi être remplacées par des nervures.FIG. 3 represents a variant, in which the safety element is a rod 5 engaged inside the shaft 1 '. Four notches 6a - 6d are formed in the inner periphery of the tree, in line with the rod 5. The latter has a section with sharp angles, so as to prevent the rotation of the tree if it comes to rest above. The notches 6a - 6d could also be replaced by ribs.

D'autres formes de reliefs pourront évidemment être adoptées, l'essentiel étant

  • 1- de supporter un tronçon d'arbre brisé pour qu'il ne tombe pas;
  • 2- de bloquer la rotation.
Other forms of relief can obviously be adopted, the essential being
  • 1- to support a section of broken tree so that it does not fall;
  • 2- to block the rotation.

Claims (3)

  1. A rotary shaft fitted with a safety device against rupture of said shaft (1) for preventing the shaft from rotating and for preventing broken portions thereof from falling, the device being particularly suitable for use with a shaft that winds up lifting straps for a raisable curtain or that winds up the curtain itself, including at least one safety element (3, 5) placed below the shaft to prevent it from falling, the peripheral surface of the shaft and the facing surface of said safety element being provided with means such as portions in relief (2, 6) that co-operate to prevent the shaft from rotating when a portion of the shaft is retained by said safety element due to the shaft rupturing.
  2. A device according to claim 1, in which the safety element is a bracket (3) surrounding the bottom portion of the shaft, the inside of the bracket being provided with portions in relief such as at least one rib (4), and the surface of the shaft also being provided with portions in relief, such as at least one longitudinal groove (2) suitable for engaging said rib to be locked thereagainst.
  3. A device according to claim 1, in which the safety element is a rod (1) engaged inside a hollow shaft (1'), the inside peripheral wall of said shaft including portions in relief such as at least one longitudinal groove (6a - 6d) suitable for engaging said rod so as to be locked thereon.
EP93401940A 1992-07-29 1993-07-27 Breakage safety device for rotary shaft Expired - Lifetime EP0586271B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR929209391A FR2694371B1 (en) 1992-07-29 1992-07-29 Safety device against breakage for rotating shaft.
FR9209391 1992-07-29

Publications (2)

Publication Number Publication Date
EP0586271A1 EP0586271A1 (en) 1994-03-09
EP0586271B1 true EP0586271B1 (en) 1997-01-02

Family

ID=9432411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401940A Expired - Lifetime EP0586271B1 (en) 1992-07-29 1993-07-27 Breakage safety device for rotary shaft

Country Status (7)

Country Link
US (1) US5481943A (en)
EP (1) EP0586271B1 (en)
AT (1) ATE147129T1 (en)
CA (1) CA2101597C (en)
DE (1) DE69307058T2 (en)
ES (1) ES2098694T3 (en)
FR (1) FR2694371B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5853040A (en) * 1995-09-22 1998-12-29 Benthin Aktiengesellschaft Cassette blind with brake coupling
US5906347A (en) * 1997-08-28 1999-05-25 Noland; E. Bruce Drive shaft containment bracket
FR2780088B1 (en) * 1998-06-23 2000-10-20 Nergeco Sa MULTI-FUNCTIONAL CONNECTION CONSOLE FOR HANDLING DOOR
FR2798695B1 (en) 1999-09-21 2001-11-23 Bernard Simon DEVICE FOR GUIDING A WINDING DRUM OF A HANDLING DOOR WITH FLEXIBLE CURTAIN
US10407982B2 (en) * 2014-06-24 2019-09-10 Lutron Technology Company Llc Retention systems for window treatment installations

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US169822A (en) * 1875-11-09 Improvement in curtain-fixtures
US162564A (en) * 1875-04-27 Improvement in curtain-fixtures
DE2608006A1 (en) * 1975-10-03 1977-04-14 Cosimo Gigante Officine Meccan Roller blind securing mechanism - has stationary drum and rotating shaft: mounted disc carrying centrifugal force operated catch pins
DE3300331C1 (en) * 1983-01-07 1984-05-10 Werner 4286 Südlohn Haake gate
GB2142366A (en) * 1983-05-13 1985-01-16 Montrose Limited Secondary glazing system
DE3608467A1 (en) * 1986-03-14 1987-09-24 Menke Wilhelm Means for preventing rolling shutter doors, rolling grilles and the like from falling down
US4932456A (en) * 1989-07-03 1990-06-12 Gary Buxbaum Bead-chain drive for roll up blinds

Also Published As

Publication number Publication date
ATE147129T1 (en) 1997-01-15
ES2098694T3 (en) 1997-05-01
FR2694371B1 (en) 1994-09-30
DE69307058D1 (en) 1997-02-13
EP0586271A1 (en) 1994-03-09
DE69307058T2 (en) 1997-07-10
CA2101597A1 (en) 1994-01-30
US5481943A (en) 1996-01-09
CA2101597C (en) 2003-09-09
FR2694371A1 (en) 1994-02-04

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