EP2537502A1 - Castor brake for hospital bed - Google Patents

Castor brake for hospital bed Download PDF

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Publication number
EP2537502A1
EP2537502A1 EP12305712A EP12305712A EP2537502A1 EP 2537502 A1 EP2537502 A1 EP 2537502A1 EP 12305712 A EP12305712 A EP 12305712A EP 12305712 A EP12305712 A EP 12305712A EP 2537502 A1 EP2537502 A1 EP 2537502A1
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EP
European Patent Office
Prior art keywords
rolling device
bogie
braking element
transverse axis
braking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12305712A
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German (de)
French (fr)
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EP2537502B1 (en
Inventor
Mickaël Jamet
Jérémy Demion
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Edena SAS
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Edena SAS
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Application filed by Edena SAS filed Critical Edena SAS
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A61G7/0528—Steering or braking devices for castor wheels

Definitions

  • the present invention relates to a compact braking system for a hospital bed.
  • the beds must be adapted to the residents.
  • the medical beds must also facilitate the work of the care teams.
  • the frame of a hospital bed can be in the form of a mechanical assembly of different parts articulated together and set in motion by one or more actuators.
  • Such a chassis makes it possible to adjust, via appropriate control means, the height of the bed between a high position and a low position according to the needs of the patient and care to practice.
  • the medical beds generally have a chassis with rolling devices and equipped with braking means.
  • These rolling devices may consist of self-braking wheels.
  • a self-braking wheel may be too cumbersome to allow the placing of certain medical beds in the low position.
  • These rolling devices consist of bogies on wheels less bulky and comprising a brake pad bearing on the ground instead of the wheels when it is rotated.
  • the brake pad can be actuated unexpectedly by the obstacle to be crossed.
  • a rolling device for a hospital bed the rolling device being equipped with compact braking means allowing the crossing without difficulty an obstacle such as a march, and avoiding a nuisance tripping of braking when crossing such an obstacle.
  • the invention relates to a rolling device for a hospital bed, the rolling device comprising a bogie with two front and rear wheels intended to rest on the ground, and braking means located between the two wheels of the bogie and tilting between a braked position and a freewheel position, the braking means comprising an actuator and a braking element equipped at a first end of a braking pad, the braking element taking under the effect of the setting movement of the actuator is the braked position in which the brake shoe is in contact with the ground in place of at least one wheel, or the freewheel position in which the wheels are in contact with the ground and the shoe of braking is not in contact with the ground, the rolling device being characterized in that the second end of the braking element is rotatably mounted with respect to a first transverse axis the bogie, while the actuator is rotatably mounted relative to a second transverse axis of the bogie, the second transverse axis being distinct from the first transverse axis.
  • the figure 1 represents a rolling device 10 according to the invention.
  • This rolling device 10 is more particularly intended to be mounted at the end of a foot of the frame of a hospital bed.
  • the rolling device 10 comprises an attachment pin 12 for rotating the rolling device 10 at the end of a foot of the chassis of a hospital bed, for example in replacement of a car wheel. -okitude.
  • the rolling device 10 comprises a bogie 14 with two casters before 16 and rear 18 intended to rest on the ground S, and braking means 20 located between the two front and rear wheels (16,18) of the bogie.
  • the front wheels 16 and rear 18 are mounted crazy relative to the bogie 14.
  • the braking means 20 can switch between a braked position, illustrated on the Figure 2A , and a freewheel position, illustrated on the Figure 2B .
  • the braking means 20 comprise an actuator 22 and a braking element 24 equipped at one end 26 with a braking pad 28.
  • the actuator 22 is intended to be set in motion, as illustrated by the arrows M, by a person belonging in particular to a care team to cause the tilting of the braking means 20 from the braked position to the freewheel position, or from the freewheel position to the braked position.
  • the actuator 22 extends beyond the rolling device 10 by a pedal or a lever L.
  • the braking element 24 takes under the effect of the setting in motion of the actuator 22, the braked position in which the braking pad 28 is in contact with the ground S in place of at least one roulette (16,18), the freewheel position in which the rollers (16,18) are in contact with the ground S and the braking pad 28 is not in contact with the ground S.
  • the actuator 22 and the braking element 24 are two distinct parts, movable with respect to each other and both mobile with respect to the bogie 14.
  • the second end 32 of the braking element 24 is rotatably mounted relative to a first transverse axis A1 of the bogie 14, while the actuator 22 is rotatably mounted relative to a second transverse axis A2 of the bogie 14. , the second transverse axis A2 being distinct from the first transverse axis A1.
  • the actuator 22 and the braking element 24 are rotatably mounted relative to the frame 30 of the bogie 14, the two transverse axes A1 and A2 being supported by the side walls (34-1, 34-2) of the chassis 30 of the truck 14.
  • the second transverse axis A2 protrudes from the frame 30 to form the fixing pin 12.
  • the second transverse axis A2 is disposed above and in front of the first transverse axis A1.
  • the braking pad 28 is made of a material known to those skilled in the art and adapted to provide good adhesion.
  • this shoe 28 is removably attached to the braking element 24 so that it can be replaced when worn.
  • the actuator 22 comprises a cam 36 causing tilting of the braking element 24 between the braked position and the freewheel position.
  • the braking element 24 comprises a follower 38 set in motion by the driving profile P of the cam 36.
  • the driving profile P substantially corresponds to a variable radius arc.
  • the drive profile P of the cam 36 has a first notch 40 and a second notch 42 located respectively at distances (D1, D2) different from the second transverse axis A2 of the bogie, and in which the follower 38 of the braking element 24 is alternately housed.
  • the follower 38 is a protuberance 44 whose protruding shape corresponds substantially to the cutting of the notches (40,42) in the drive profile P of the cam.
  • the cuts of the notches (40,42) and the protruding shape of the protuberance 44 of the follower 38 are rounded to facilitate the tilting of the braking means 20 between the braked position and the freewheel position.
  • the follower 38 may be a roller whose diameter corresponds to the cutting of the notches (40,42) in the drive profile P of the cam.
  • the two notches (40, 42) are situated respectively at different distances (D1, D2) from the second transverse axis. A2 of the bogie.
  • the distance D2 being greater than the distance D1
  • the second notch 42 is furthest from the second transverse axis A2 of rotation of the bogie and defines the braked position of the element of braking
  • the first notch 40 is closest to the second transverse axis A2 of rotation of the bogie and defines the freewheel position of the braking element.
  • the distance of the second notch 42 causes the inclination of the braking element 24 towards the ground S, the support of the braking pad 28 on the ground S, then the lifting of at least one wheel (16, 18).
  • the proximity of the first notch 40 causes the retraction of the braking element 24 to the bogie 14, spreads the brake pad 28 of the ground S, and allows to rest the two wheels (16,18) on the ground S .
  • the braking element 24 comprises a roller 46 mounted free to rotate between its first end 26 and its second end 32.
  • the roller 46 rolls over the obstacle and avoids the blocking of the truck 14 on the obstacle or a nuisance tripping braking.
  • a return spring 48 is arranged between the actuator 22 and the braking element 24 so as to create a force now the follower 38 in the notches (40,42).
  • the present invention also covers a medical bed equipped with a rolling device as just described.

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  • Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

The device (10) has a bogie (14) comprising two front wheels (16) and two back wheels (18) that are rested on a ground (S). A braking unit (20) is located between the front and back wheels and tilted between a braked position and a freewheel position, and comprises an actuator (22) and a braking element (24). An end (32) of the braking element is mounted in rotation with respect to a first transverse axis (A1) of the bogie when the actuator is rotatably mounted with respect to a second transverse axis (A2) of the bogie, where the axes are different from each other.

Description

La présente invention est relative à un système de freinage compact pour un lit médicalisé.The present invention relates to a compact braking system for a hospital bed.

Dans le cadre d'un hébergement médicalisé, les lits doivent répondre à différentes exigences.In the case of medical accommodation, the beds must meet different requirements.

Tout d'abord, les lits doivent être adaptés aux résidents.First, the beds must be adapted to the residents.

En effet, les patients ont des morphologies et des pathologies différentes, de plus susceptibles d'évoluer au cours de l'hébergement du patient.Indeed, patients have different morphologies and pathologies, more likely to evolve during the patient's accommodation.

Ainsi, dans le cas d'un patient atteint de la maladie d'Alzheimer ou fortement agité, il est préconisé d'utiliser un lit avec une position basse la plus proche du sol afin de réduire les risques de blessures dues à des chutes.Thus, in the case of a patient with Alzheimer's disease or strongly agitated, it is recommended to use a bed with a low position closest to the ground to reduce the risk of injury due to falls.

A l'inverse, pour d'autres personnes plus faiblement handicapées, un lit plus haut permettra de faciliter la montée et la descente du lit, et donc d'améliorer le confort et l'indépendance des personnes hébergées.Conversely, for other people with lower disability, a higher bed will facilitate the rise and descent of the bed, and thus improve the comfort and independence of the people accommodated.

Ensuite, les lits médicalisés doivent aussi faciliter le travail des équipes soignantes.Secondly, the medical beds must also facilitate the work of the care teams.

Ergonomiquement, il est plus intéressant pour donner des soins d'avoir le patient en hauteur, même si ce dernier doit rester le plus près du sol le reste du temps. Aussi, afin de répondre à ces premières exigences, les lits médicalisés possèdent généralement un châssis à hauteur variable.Ergonomically, it is more interesting to give care to have the patient in height, even if the latter must stay closest to the ground the rest of the time. Also, in order to meet these first requirements, medical beds generally have a variable height frame.

Comme présenté dans le document américain US 2007/0234477 , le châssis d'un lit médicalisé peut se présenter sous la forme d'un assemblage mécanique de différentes pièces articulées entre elles et mises en mouvement par un ou plusieurs actionneurs.As presented in the American document US 2007/0234477 , the frame of a hospital bed can be in the form of a mechanical assembly of different parts articulated together and set in motion by one or more actuators.

Un tel châssis permet de régler, via des moyens de commande appropriés, la hauteur du lit entre une position haute et une position basse en fonction des besoins du patient et des soins à pratiquer.Such a chassis makes it possible to adjust, via appropriate control means, the height of the bed between a high position and a low position according to the needs of the patient and care to practice.

Ensuite, dans le contexte d'un hébergement médicalisé, il est souvent nécessaire de déplacer les lits, avec ou sans patient dessus, mais aussi d'immobiliser le lit une fois celui-ci déplacé.Then, in the context of a medical accommodation, it is often necessary to move the beds, with or without patient on, but also to immobilize the bed once it moved.

Aussi, afin de répondre à ces deuxièmes exigences, les lits médicalisés possèdent généralement un châssis avec des dispositifs roulants et équipés de moyens de freinage.Also, in order to meet these second requirements, the medical beds generally have a chassis with rolling devices and equipped with braking means.

Ces dispositifs roulants peuvent consister en des roues auto-freinées. Toutefois, une roue auto-freinée peut s'avérer trop encombrante pour permettre la mise en position basse de certains lits médicalisés.These rolling devices may consist of self-braking wheels. However, a self-braking wheel may be too cumbersome to allow the placing of certain medical beds in the low position.

Aussi, et comme présenté dans le document américain US 2007/0226907 , des dispositifs roulants plus compacts mais tout de même pourvus de moyens de freinage ont été conçus.Also, and as presented in the American document US 2007/0226907 , rolling devices more compact but still provided with braking means have been designed.

Ces dispositifs roulants sont constitués de bogies à roulettes moins encombrants et comprenant un patin de freinage venant en appui sur le sol à la place des roulettes lorsqu'il est mis en rotation.These rolling devices consist of bogies on wheels less bulky and comprising a brake pad bearing on the ground instead of the wheels when it is rotated.

Selon un inconvénient de cette conception, lors du déplacement du lit et du franchissement d'un obstacle tel une marche, le bogie peut rester coincé sur l'obstacle avec une roulette de chaque côté de celui-ci, ce qui est particulièrement ennuyeux pour les équipes de soins quand le lit est utilisé pour déplacer un patient.According to a disadvantage of this design, when moving the bed and crossing an obstacle such as a step, the truck can remain stuck on the obstacle with a wheel on each side of it, which is particularly boring for them. care teams when the bed is used to move a patient.

De plus, avec cette conception de l'art antérieur et dans certains cas, le patin de freinage peut être actionné intempestivement par l'obstacle à franchir.In addition, with this design of the prior art and in some cases, the brake pad can be actuated unexpectedly by the obstacle to be crossed.

Aussi, c'est un objectif de la présente invention de pallier les inconvénients de l'art antérieur en proposant un dispositif roulant pour un lit médicalisé, le dispositif roulant étant équipé de moyens de freinage compacts permettant le franchissement sans difficulté d'un obstacle tel une marche, et évitant un déclenchement intempestif du freinage lors du franchissement d'un tel obstacle. A cet effet, l'invention a pour objet un dispositif roulant pour un lit médicalisé, le dispositif roulant comprenant un bogie avec deux roulettes avant et arrière destinées à reposer sur le sol, ainsi que des moyens de freinage situés entre les deux roulettes du bogie et basculant entre une position freinée et une position roue libre, les moyens de freinage comprenant un actionneur et un élément de freinage équipé à une première extrémité d'un patin de freinage, l'élément de freinage prenant sous l'effet de la mise en mouvement de l'actionneur soit la position freinée dans laquelle le patin de freinage est en contact avec le sol à la place d'au moins une roulette, soit la position roue libre dans laquelle les roulettes sont en contact avec le sol et le patin de freinage n'est pas en contact avec le sol, le dispositif roulant étant caractérisé en ce que la deuxième extrémité de l'élément de freinage est montée en rotation par rapport à un premier axe transversal du bogie, tandis que l'actionneur est monté en rotation par rapport à un deuxième axe transversal du bogie, le deuxième axe transversal étant distinct du premier axe transversal.Also, it is an object of the present invention to overcome the disadvantages of the prior art by providing a rolling device for a hospital bed, the rolling device being equipped with compact braking means allowing the crossing without difficulty an obstacle such as a march, and avoiding a nuisance tripping of braking when crossing such an obstacle. For this purpose, the invention relates to a rolling device for a hospital bed, the rolling device comprising a bogie with two front and rear wheels intended to rest on the ground, and braking means located between the two wheels of the bogie and tilting between a braked position and a freewheel position, the braking means comprising an actuator and a braking element equipped at a first end of a braking pad, the braking element taking under the effect of the setting movement of the actuator is the braked position in which the brake shoe is in contact with the ground in place of at least one wheel, or the freewheel position in which the wheels are in contact with the ground and the shoe of braking is not in contact with the ground, the rolling device being characterized in that the second end of the braking element is rotatably mounted with respect to a first transverse axis the bogie, while the actuator is rotatably mounted relative to a second transverse axis of the bogie, the second transverse axis being distinct from the first transverse axis.

D'autres caractéristiques et avantages ressortiront de la description qui va suivre du dispositif de l'invention, description d'un mode de réalisation préférentiel donnée à titre d'exemple uniquement, en regard des dessins annexés sur lesquels :

  • la figure 1 illustre une vue en perspective d'un dispositif roulant selon l'invention,
  • les figures 2A et 2B illustrent respectivement une vue de côté en coupe partielle dans la position freinée et dans la position roue libre des moyens de freinage d'un dispositif roulant selon l'invention,
  • la figure 3 illustre le franchissement d'un obstacle par un dispositif roulant selon l'invention,
  • la figure 4 illustre une vue en perspective sans le châssis du bogie d'un dispositif roulant selon l'invention.
Other characteristics and advantages will emerge from the following description of the device of the invention, a description of a preferred embodiment given by way of example only, with reference to the appended drawings in which:
  • the figure 1 illustrates a perspective view of a rolling device according to the invention,
  • the Figures 2A and 2B illustrate respectively a partial sectional side view in the braked position and in the freewheel position of the braking means of a rolling device according to the invention,
  • the figure 3 illustrates the crossing of an obstacle by a rolling device according to the invention,
  • the figure 4 illustrates a perspective view without the bogie frame of a rolling device according to the invention.

La figure 1 représente un dispositif roulant 10 selon l'invention.The figure 1 represents a rolling device 10 according to the invention.

Ce dispositif roulant 10 est plus particulièrement destiné à être monté à l'extrémité d'un pied du châssis d'un lit médicalisé.This rolling device 10 is more particularly intended to be mounted at the end of a foot of the frame of a hospital bed.

A cet effet, le dispositif roulant 10 comporte un axe de fixation 12 permettant de monter en rotation le dispositif roulant 10 au niveau de l'extrémité d'un pied du châssis d'un lit médicalisé, par exemple en remplacement d'une roue auto-freinée.For this purpose, the rolling device 10 comprises an attachment pin 12 for rotating the rolling device 10 at the end of a foot of the chassis of a hospital bed, for example in replacement of a car wheel. -freinée.

Par la suite, dans l'objectif de permettre le déplacement et l'immobilisation du lit médicalisé, le dispositif roulant 10 comprend un bogie 14 avec deux roulettes avant 16 et arrière 18 destinées à reposer sur le sol S, ainsi que des moyens de freinage 20 situés entre les deux roulettes avant et arrière (16,18) du bogie. Avantageusement, pour offrir une grand liberté de déplacement du lit médicalisé, les roulettes avant 16 et arrière 18 sont montées folles par rapport au bogie 14.Subsequently, in order to allow the moving and immobilization of the medical bed, the rolling device 10 comprises a bogie 14 with two casters before 16 and rear 18 intended to rest on the ground S, and braking means 20 located between the two front and rear wheels (16,18) of the bogie. Advantageously, to provide a great freedom of movement of the medical bed, the front wheels 16 and rear 18 are mounted crazy relative to the bogie 14.

Les moyens de freinage 20 peuvent basculer entre une position freinée, illustrée sur la figure 2A, et une position roue libre, illustrée sur la figure 2B.The braking means 20 can switch between a braked position, illustrated on the Figure 2A , and a freewheel position, illustrated on the Figure 2B .

Selon l'invention, les moyens de freinage 20 comprennent un actionneur 22 et un élément de freinage 24 équipé à une première extrémité 26 d'un patin de freinage 28.According to the invention, the braking means 20 comprise an actuator 22 and a braking element 24 equipped at one end 26 with a braking pad 28.

L'actionneur 22 est destiné à être mis en mouvement, comme illustré par les flèches M, par une personne appartenant notamment à une équipe de soins afin d'entraîner le basculement des moyens de freinage 20 de la position freinée vers la position roue libre, ou de la position roue libre vers la position freinée.The actuator 22 is intended to be set in motion, as illustrated by the arrows M, by a person belonging in particular to a care team to cause the tilting of the braking means 20 from the braked position to the freewheel position, or from the freewheel position to the braked position.

A cet effet, l'actionneur 22 se prolonge au-delà du dispositif roulant 10 par une pédale ou un levier L.For this purpose, the actuator 22 extends beyond the rolling device 10 by a pedal or a lever L.

Ensuite, l'élément de freinage 24 prend sous l'effet de la mise en mouvement de l'actionneur 22, soit la position freinée dans laquelle le patin de freinage 28 est en contact avec le sol S à la place d'au moins une roulette (16,18), soit la position roue libre dans laquelle les roulettes (16,18) sont en contact avec le sol S et le patin de freinage 28 n'est pas en contact avec le sol S.Then, the braking element 24 takes under the effect of the setting in motion of the actuator 22, the braked position in which the braking pad 28 is in contact with the ground S in place of at least one roulette (16,18), the freewheel position in which the rollers (16,18) are in contact with the ground S and the braking pad 28 is not in contact with the ground S.

Selon la présente invention, l'actionneur 22 et l'élément de freinage 24 sont deux pièces distinctes, mobiles l'une par rapport à l'autre et toutes deux mobiles par rapport au bogie 14.According to the present invention, the actuator 22 and the braking element 24 are two distinct parts, movable with respect to each other and both mobile with respect to the bogie 14.

Ainsi, la deuxième extrémité 32 de l'élément de freinage 24 est montée en rotation par rapport à un premier axe transversal A1 du bogie 14, tandis que l'actionneur 22 est monté en rotation par rapport à un deuxième axe transversal A2 du bogie 14, le deuxième axe transversal A2 étant distinct du premier axe transversal A1.Thus, the second end 32 of the braking element 24 is rotatably mounted relative to a first transverse axis A1 of the bogie 14, while the actuator 22 is rotatably mounted relative to a second transverse axis A2 of the bogie 14. , the second transverse axis A2 being distinct from the first transverse axis A1.

Plus précisément, l'actionneur 22 et l'élément de freinage 24 sont montés en rotation par rapport au châssis 30 du bogie 14, les deux axes transversaux A1 et A2 étant soutenus par les parois latérales (34-1,34-2) du châssis 30 du bogie 14.More specifically, the actuator 22 and the braking element 24 are rotatably mounted relative to the frame 30 of the bogie 14, the two transverse axes A1 and A2 being supported by the side walls (34-1, 34-2) of the chassis 30 of the truck 14.

Selon une disposition préférée visant à diminuer l'encombrement du dispositif roulant selon l'invention, le deuxième axe transversal A2 dépasse du châssis 30 pour former l'axe de fixation 12.According to a preferred arrangement intended to reduce the size of the rolling device according to the invention, the second transverse axis A2 protrudes from the frame 30 to form the fixing pin 12.

Dans le même objectif, le deuxième axe transversal A2 est disposé au-dessus et en avant du premier axe transversal A1.For the same purpose, the second transverse axis A2 is disposed above and in front of the first transverse axis A1.

Le patin de freinage 28 est en un matériau connu de l'homme du métier et adapté pour fournir une bonne adhérence.The braking pad 28 is made of a material known to those skilled in the art and adapted to provide good adhesion.

Avantageusement, ce patin 28 est fixé de manière amovible à l'élément de freinage 24 de manière à pouvoir être remplacé lorsqu'il est usé.Advantageously, this shoe 28 is removably attached to the braking element 24 so that it can be replaced when worn.

Ensuite, afin d'entraîner le basculement de l'élément de freinage 24 entre la position freinée et la position roue libre, l'actionneur 22 comporte une came 36 entraînant le basculement de l'élément de freinage 24 entre la position freinée et la position roue libre.Then, in order to cause tilting of the braking element 24 between the braked position and the freewheel position, the actuator 22 comprises a cam 36 causing tilting of the braking element 24 between the braked position and the freewheel position.

De son côté, l'élément de freinage 24 comporte un suiveur 38 mis en mouvement par le profil d'entraînement P de la came 36.For its part, the braking element 24 comprises a follower 38 set in motion by the driving profile P of the cam 36.

Le profil d'entraînement P correspond sensiblement à un arc de cercle à rayon variable.The driving profile P substantially corresponds to a variable radius arc.

De plus, afin d'assurer le maintien en position de l'actionneur 22 et de l'élément de freinage 24 dans la position freinée et dans la position roue libre, le profil d'entraînement P de la came 36 comporte une première encoche 40 et une deuxième encoche 42 situées respectivement à des distances (D1,D2) différentes du deuxième axe transversal A2 du bogie, et dans lesquelles vient se loger alternativement le suiveur 38 de l'élément de freinage 24.In addition, in order to maintain the position of the actuator 22 and the braking element 24 in the braked position and in the freewheel position, the drive profile P of the cam 36 has a first notch 40 and a second notch 42 located respectively at distances (D1, D2) different from the second transverse axis A2 of the bogie, and in which the follower 38 of the braking element 24 is alternately housed.

Dans un mode de réalisation préféré et illustré sur les figures, le suiveur 38 est une protubérance 44 dont la forme en saillie correspond sensiblement à la découpe des encoches (40,42) dans le profil d'entraînement P de la came. Avantageusement, les découpes des encoches (40,42) et la forme en saillie de la protubérance 44 du suiveur 38 sont arrondies pour faciliter le basculement des moyens de freinage 20 entre la position freinée et la position roue libre.In a preferred embodiment and illustrated in the figures, the follower 38 is a protuberance 44 whose protruding shape corresponds substantially to the cutting of the notches (40,42) in the drive profile P of the cam. Advantageously, the cuts of the notches (40,42) and the protruding shape of the protuberance 44 of the follower 38 are rounded to facilitate the tilting of the braking means 20 between the braked position and the freewheel position.

Dans une variante de réalisation non représentée, le suiveur 38 peut être un rouleau dont le diamètre correspond à la découpe des encoches (40,42) dans le profil d'entraînement P de la came.In an alternative embodiment not shown, the follower 38 may be a roller whose diameter corresponds to the cutting of the notches (40,42) in the drive profile P of the cam.

Afin d'obtenir une position freinée et une position roue libre différente pour l'actionneur 22 et l'élément de freinage 24, les deux encoches (40,42) sont situées respectivement à des distances (D1,D2) différentes du deuxième axe transversal A2 du bogie.In order to obtain a braked position and a different freewheel position for the actuator 22 and the braking element 24, the two notches (40, 42) are situated respectively at different distances (D1, D2) from the second transverse axis. A2 of the bogie.

Dans un mode de réalisation préféré, la distance D2 étant supérieure à la distance D1, la deuxième encoche 42 est la plus éloignée du deuxième axe transversal A2 de rotation du bogie et définit la position freinée de l'élément de freinage, tandis que la première encoche 40 est la plus proche du deuxième axe transversal A2 de rotation du bogie et définit la position roue libre de l'élément de freinage.In a preferred embodiment, the distance D2 being greater than the distance D1, the second notch 42 is furthest from the second transverse axis A2 of rotation of the bogie and defines the braked position of the element of braking, while the first notch 40 is closest to the second transverse axis A2 of rotation of the bogie and defines the freewheel position of the braking element.

En effet, comme illustré en figure 2A, l'éloignement de la deuxième encoche 42 provoque l'inclinaison de l'élément de freinage 24 vers le sol S, l'appui du patin de freinage 28 sur le sol S, puis le relevage d'au moins une roulette (16,18).Indeed, as illustrated in Figure 2A , the distance of the second notch 42 causes the inclination of the braking element 24 towards the ground S, the support of the braking pad 28 on the ground S, then the lifting of at least one wheel (16, 18).

A l'inverse, et comme illustré en figure 2B, la proximité de la première encoche 40 provoque la rétraction de l'élément de freinage 24 vers le bogie 14, écarte le patin de freinage 28 du sol S, et permet de laisser reposer les deux roulettes (16,18) sur le sol S.Conversely, and as illustrated in Figure 2B , the proximity of the first notch 40 causes the retraction of the braking element 24 to the bogie 14, spreads the brake pad 28 of the ground S, and allows to rest the two wheels (16,18) on the ground S .

Avantageusement, comme illustré en figure 3 et pour faciliter le franchissement d'un obstacle O tel une marche lors du déplacement d'un lit médicalisé, l'élément de freinage 24 comporte un galet 46 monté libre en rotation entre sa première extrémité 26 et sa deuxième extrémité 32.Advantageously, as illustrated in figure 3 and to facilitate the crossing of an obstacle O such a step when moving a hospital bed, the braking element 24 comprises a roller 46 mounted free to rotate between its first end 26 and its second end 32.

Ainsi, lors du franchissement de l'obstacle O, le galet 46 roule sur l'obstacle et permet d'éviter le blocage du bogie 14 sur l'obstacle ou un déclenchement intempestif du freinage.Thus, when crossing the obstacle O, the roller 46 rolls over the obstacle and avoids the blocking of the truck 14 on the obstacle or a nuisance tripping braking.

Comme illustré en figure 4, afin de maintenir l'actionneur 22 et l'élément de freinage 24 dans la position freinée et dans la position roue libre, un ressort de rappel 48 est disposé entre l'actionneur 22 et l'élément de freinage 24 de manière à créer un effort maintenant le suiveur 38 dans les encoches (40,42). Enfin, la présente invention couvre aussi un lit médicalisé équipé d'un dispositif roulant tel qu'il vient d'être décrit.As illustrated in figure 4 in order to maintain the actuator 22 and the braking element 24 in the braked position and in the freewheel position, a return spring 48 is arranged between the actuator 22 and the braking element 24 so as to create a force now the follower 38 in the notches (40,42). Finally, the present invention also covers a medical bed equipped with a rolling device as just described.

Claims (10)

Dispositif roulant (10) pour un lit médicalisé, le dispositif roulant (10) comprenant un bogie (14) avec deux roulettes avant (16) et arrière (18) destinées à reposer sur le sol (S), ainsi que des moyens de freinage (20) situés entre les deux roulettes (16,18) du bogie et basculant entre une position freinée et une position roue libre, les moyens de freinage (20) comprenant un actionneur (22) et un élément de freinage (24) équipé à une première extrémité (26) d'un patin de freinage (28), l'élément de freinage (24) prenant sous l'effet de la mise en mouvement de l'actionneur (22) soit la position freinée dans laquelle le patin de freinage (28) est en contact avec le sol (S) à la place d'au moins une roulette (16,18), soit la position roue libre dans laquelle les roulettes (16,18) sont en contact avec le sol (S) et le patin de freinage (28) n'est pas en contact avec le sol (S), le dispositif roulant est caractérisé en ce que la deuxième extrémité (32) de l'élément de freinage (24) est montée en rotation par rapport à un premier axe transversal (A1) du bogie (14), tandis que l'actionneur (22) est monté en rotation par rapport à un deuxième axe transversal (A2) du bogie (14), le deuxième axe transversal (A2) étant distinct du premier axe transversal (A1).Rolling device (10) for a hospital bed, the rolling device (10) comprising a bogie (14) with two front (16) and rear (18) wheels for resting on the ground (S), as well as braking means (20) located between the two wheels (16,18) of the bogie and tilting between a braked position and a freewheel position, the braking means (20) comprising an actuator (22) and a braking element (24) equipped with a first end (26) of a braking pad (28), the braking element (24) taking under the effect of the setting in motion of the actuator (22) is the braked position in which the pad of brake (28) is in contact with the ground (S) in place of at least one wheel (16, 18), ie the freewheel position in which the rollers (16, 18) are in contact with the ground (S ) and the brake shoe (28) is not in contact with the ground (S), the rolling device is characterized in that the second end (32) of the nt (24) is rotatably mounted relative to a first transverse axis (A1) of the bogie (14), while the actuator (22) is rotatably mounted relative to a second transverse axis (A2) of the bogie (14), the second transverse axis (A2) being distinct from the first transverse axis (A1). Dispositif roulant (10) selon la revendication 1, caractérisé en ce que l'actionneur (22) comporte une came (36) entraînant le basculement de l'élément de freinage (24) entre la position freinée et la position roue libre.Rolling device (10) according to claim 1, characterized in that the actuator (22) comprises a cam (36) causing the braking element (24) to tilt between the braked position and the freewheel position. Dispositif roulant (10) selon la revendication 2, caractérisé en ce que l'élément de freinage (24) comporte un suiveur (38) mis en mouvement par le profil d'entraînement (P) de la came (36).Rolling device (10) according to claim 2, characterized in that the braking element (24) comprises a follower (38) set in motion by the driving profile (P) of the cam (36). Dispositif roulant (10) selon la revendication 3, caractérisé en ce que le profil d'entraînement (P) de la came (36) comporte une première encoche (40) et une deuxième encoche (42) situées respectivement à des distances (D1,D2) différentes du deuxième axe transversal (A2) du bogie, et dans lesquelles vient se loger alternativement le suiveur (38) de l'élément de freinage (24).Rolling device (10) according to claim 3, characterized in that the drive profile (P) of the cam (36) has a first notch (40) and a second notch (42) respectively at distances (D1, D2) different from the second transverse axis (A2) of the bogie, and in which is housed alternately the follower (38) of the braking element (24). Dispositif roulant (10) selon la revendication 4, caractérisé en ce que le suiveur (38) est une protubérance (44) dont la forme en saillie correspond à la découpe des encoches (40,42) dans le profil d'entraînement (P) de la came.Rolling device (10) according to claim 4, characterized in that the follower (38) is a protuberance (44) whose protruding shape corresponds to the cut of the notches (40,42) in the drive profile (P) of the cam. Dispositif roulant (10) selon la revendication 4, caractérisé en ce que le suiveur (38) est un rouleau dont le diamètre correspond à la découpe des encoches (40,42) dans le profil d'entraînement (P) de la came.Rolling device (10) according to claim 4, characterized in that the follower (38) is a roller whose diameter corresponds to the cutting of the notches (40,42) in the drive profile (P) of the cam. Dispositif roulant (10) selon l'une des revendications 4 à 6, caractérisé en ce que, la distance (D2) étant supérieure à la distance (D1), la deuxième encoche (42) est la plus éloignée du deuxième axe transversal (A2) de rotation du bogie et définit la position freinée de l'élément de freinage (24), tandis que la première encoche (40) est la plus proche du deuxième axe transversal (A2) de rotation du bogie et définit la position roue libre de l'élément de freinage (24).Rolling device (10) according to one of claims 4 to 6, characterized in that , the distance (D2) being greater than the distance (D1), the second notch (42) is furthest from the second transverse axis (A2 ) of rotation of the bogie and defines the braked position of the braking element (24), while the first notch (40) is closest to the second transverse axis (A2) of rotation of the bogie and defines the freewheel position of the braking element (24). Dispositif roulant (10) selon l'une des revendications 4 à 7, caractérisé en ce qu'un ressort de rappel (48) est disposé entre l'actionneur (22) et l'élément de freinage (24) de manière à créer un effort maintenant le suiveur (38) dans les encoches (40,42).Rolling device (10) according to one of Claims 4 to 7, characterized in that a return spring (48) is arranged between the actuator (22) and the braking element (24) so as to create a force now the follower (38) in the notches (40,42). Dispositif roulant (10) selon l'une des revendications 1 à 8, caractérisé en ce que l'élément de freinage (24) comporte un galet (46) monté libre en rotation entre sa première extrémité (26) et sa deuxième extrémité (32).Rolling device (10) according to one of claims 1 to 8, characterized in that the braking element (24) comprises a roller (46) rotatably mounted between its first end (26) and its second end (32). ). Dispositif roulant (10) selon l'une des revendications 1 à 9, caractérisé en ce que l'actionneur (22) se prolonge au-delà du dispositif roulant (10) par une pédale ou un levier (L).Rolling device (10) according to one of claims 1 to 9, characterized in that the actuator (22) extends beyond the rolling device (10) by a pedal or a lever (L).
EP12305712.7A 2011-06-21 2012-06-21 castor brake for hospital bed Active EP2537502B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1155451A FR2976792B1 (en) 2011-06-21 2011-06-21 BRAKING SYSTEM OF A MEDICAL BED

Publications (2)

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EP2537502A1 true EP2537502A1 (en) 2012-12-26
EP2537502B1 EP2537502B1 (en) 2015-11-25

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EP12305712.7A Active EP2537502B1 (en) 2011-06-21 2012-06-21 castor brake for hospital bed

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EP (1) EP2537502B1 (en)
FR (1) FR2976792B1 (en)

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CN113606269A (en) * 2021-07-09 2021-11-05 武汉大学 Emergency braking device and braking method for medical bed trolley

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US20050057010A1 (en) * 2003-09-17 2005-03-17 Hopper Christopher J. Pedal control of brake and auxiliary wheel deployment via side and end articulation
US20070170673A1 (en) * 2006-01-19 2007-07-26 Hill-Rom Services, Inc. Stretcher having hand actuated caster braking apparatus
US20070226907A1 (en) 2006-02-11 2007-10-04 Volker Ag Bed, in particular sickbed or nursing bed
US20070234477A1 (en) 2006-02-11 2007-10-11 Volker Ag Bed, in particular sickbed or nursing bed
US20090100598A1 (en) * 2007-10-17 2009-04-23 Invacare Corporation Latching motion transfer mechanism
US20100077548A1 (en) * 2008-09-19 2010-04-01 Joerns Healthcare, Inc. Visual indicator assembly for brake for bed

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Publication number Priority date Publication date Assignee Title
US20040105733A1 (en) * 2002-11-26 2004-06-03 Timothy Hewitt Floor stop for a mobile base
US20050057010A1 (en) * 2003-09-17 2005-03-17 Hopper Christopher J. Pedal control of brake and auxiliary wheel deployment via side and end articulation
US20070170673A1 (en) * 2006-01-19 2007-07-26 Hill-Rom Services, Inc. Stretcher having hand actuated caster braking apparatus
US20070226907A1 (en) 2006-02-11 2007-10-04 Volker Ag Bed, in particular sickbed or nursing bed
US20070234477A1 (en) 2006-02-11 2007-10-11 Volker Ag Bed, in particular sickbed or nursing bed
US20090100598A1 (en) * 2007-10-17 2009-04-23 Invacare Corporation Latching motion transfer mechanism
US20100077548A1 (en) * 2008-09-19 2010-04-01 Joerns Healthcare, Inc. Visual indicator assembly for brake for bed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113606269A (en) * 2021-07-09 2021-11-05 武汉大学 Emergency braking device and braking method for medical bed trolley
CN113606269B (en) * 2021-07-09 2022-04-29 武汉大学 Emergency braking device and braking method for medical bed trolley

Also Published As

Publication number Publication date
FR2976792A1 (en) 2012-12-28
EP2537502B1 (en) 2015-11-25
FR2976792B1 (en) 2013-07-26

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