FR2479686A1 - MANEUVER DEVICE FOR RAISING AND LOWERING THE TRAY OF A BED OR THE LIKE - Google Patents

Abstract

THE DEVICE INCLUDES A DRIVE ROD 2 DRIVEN AXIALLY STEP-BY-STEP BY A FINGER 8 CARRIED BY A SHAFT 6 WITH ALTERNATE MOVEMENT. A DRIVE PART 3 WITH LOCKING BY INCLINATION, IS MOUNTED FLOATING ON THE ROD 2 AND IS ACTUATED AT ONE END BY THE FINGER 8. LOCKING PARTS 4, 5, LOCKED BY INCLINATION, ARE RECALLED BY SPRINGS 9, 10 IN THE IMMOBILIZING POSITION OF THE ROD 2. THEY ACT IN THE OPPOSITE DIRECTION. CONTROL MEANS B, C ARE PROVIDED FOR SELECTIVELY BRINGING PARTS 4, 5 INTO THE RELEASE POSITION.

Description

The present invention relates to a device for

  new work for the lifting and lowering of the bed or support of a bed or any other piece of furniture or apparatus

  intended to allow a person, for example a patient, to

  posing on it to sleep, to be examined, to be treated

or to be transported.

  At present, various structures are known

  so much to lift and lower the tray or bed base of a bed

  on which a patient, etc. can sleep or rest, and for example

  a structure in which the plate is divided into several

  sections to allow lifting of desired sections of the board by pivoting them in desired directions, causing the entire board to assume a shape

  corrugated; a structure in which the framework carrying the

  water is lifted so as to raise the tray as a whole; and a structure in which the frame is raised from the side of the patient's head or side of the patient's feet, or is raised on one side and lowered on the other, to elevate said tray only one side. by tilting it as a whole. In association

  with such a bed is installed in a suitable location

  under the platform a lifting mechanism, which comprises a lifting member for converting the displacement applied to it in an uprising of the plate or frame and a maneuvering device for applying such a

  displacement to this lifting member.

  A typical example of a conventional maneuvering device for

  to apply a displacement to the aforementioned lifting member is de-

  for example, US Patents 3,015,113 and 3,174,161.

  In this device, the female thread provided for in one of the

  trenches of a hollow drive rod cooperates with the male thread of a rotary shaft, and the male threaded rotatable shaft is rotated by a crank, or a geared motor assembly, etc., for the purpose of moving translation the driving rod. Although such a device is very useful

  widespread, it is incoherent that the friction between

  be the female thread and the male thread requires develop-

  a heavy effort when maneuvered by hand, and if we want to reduce the friction force to reduce this effort, the cost must increase. It goes without saying that the cost price also increases when the threaded shaft

2 2479686

  said male is rotated by a motor assembly

  ducer. In addition to such a device, there are pneumatic or hydraulic cylinder devices that can be used to constitute the aforementioned maneuvering device. However, these devices require an air compressor or a hydraulic pump as a source of pressure as well as various valve members such as a relief valve, a

  pressure regulating valve and a control valve. The in-

  seems of the device, equipped with these organs and tubulars as-

  companies, takes up a lot of space, makes the cost price high

  and, in addition, makes a very disadvantageous

  noise generation and maintenance issues.

  The operating device according to the present invention

  does not use a costly power source such as the

  seems geared motor, the air compressor or the hydraulic pump

  above, but it allows a manual maneuver

  thereby reducing congestion to ensure

  efficient use of the space below the bed, etc., as well as to achieve a low cost price. In addition, the operating device according to the present invention restricts

  very strongly the influence of comparative friction forces-

  to the aforementioned device with male and female threaded shaft, in order to reduce the manual operating force. Since it is reciprocated by a lever and so on, this maneuver can be done with one hand, but also with one foot. Consequently, the operating mechanism lends itself to the achievement of an optimal arrangement, taking into account various factors such as the structure of the bed, etc.

  The features and advantages of the invention

  more fully from the detailed description of forms of

  preferred embodiment of the invention which is given below in

  nonlimiting title with reference to the accompanying drawings, on the-

  which: FIG. 1A and 1B schematically represent the operating device according to the present invention, FIG.

  front view with partial section showing the interior of the

  positive while fig.lB is a plan view;

  Fig. 2 is an enlarged partial view in longitudinal section.

  showing the structure of a significant part of a

  first embodiment of the operating device according to the invention; Fig.3A, 5B, 3C and 3D are enlarged partial views in longitudinal section showing the structure and mode of action of a substantial portion of a second embodiment of the operating device according to the invention; and Fig. 4A, 4B and 40 are front views showing

  forms of implementation of the operating device according to the in-

  vention in its application to a bed.

  The numeral 1 denotes a support cylinder con-

  holding a driving rod 2 slidably mounted therein, said support cylinder having at one of its ends a

  driving and locking section A of the driving rod 2.

  In this section A, the driving rod 2 cooperates with a piece

  3 float mounted so that it can move

  cer, as well as with first and second

  cage 4 and 5 mounted floating so as to be pivoted while being each supported by one of its sides or ends. This support of one of the sides of the locking pieces 4 and 5 can be provided by a groove, a stop or a protrusion, etc., as long as the workpiece can be inclined relative to

  to piece 2 being supported by this side. A training tree

  6 is arranged near one of the sides of the driving part 3. This shaft comprises a driving pin 8 shaped so as to push the driving piece 5 by

  above mentioned in opposition to the elastic action of a res-

  reminder 7, the drive part 5 can thus be moved forward (left in the figures) by the driving pin 8 and be brought back by the return spring 7. The movement of advancement of the driving part 35 drives the driving rod 2. The locking parts 4 and 5 are inclined by respective locking springs 9 and 10, and

  they thus prevent the driving rod 2 from moving

  forward and backward. They are brought in

  vertical position or straight position by means of unlocking

  respective cage B and C, which restores to the driving rod 2 freedom of movement removed. We will describe below

  embodiments of the unlocking means B and C of the arrangement

according to the invention.

  In a first embodiment represented by K) FIG. 2, metallic wires and wires 11 and 12 are fixed

  on the other side of the first and second

  4 and 5. Thus, the unlocking means B and C can be actuated by these wires independently of the shaft

Training 6.

  In a second embodiment shown in FIGS. SA to 3D, the first blocking piece 4 is arranged facing the training room 3 so as to play a same

  spring disposed between the first locking piece 4 and the piece

  this drive 3 both the role of the return spring 7 and that of the locking spring 9. The first locking piece 4 comprises a control finger 13 which is shaped so

  to advance towards the drive shaft 6 so that its ex-

  the trestle comes elastically against the driving shaft.

  6 is under the action of the return spring 7. The part 4 bears on the fixed frame between the finger 13 and its part cooperating with the rod 2. The drive shaft 6 has a cam portion 14 which makes move the control finger 13 so as to maintain the first blocking piece 4 selectively

  in an inclined position or in a vertical position. Thus, the

  cam wire 14 and the control finger 13 together constitute

  the unlocking means B. In this second form of embodiment,

  The release means C is constituted by an unlocking rod 15 arranged facing the other side of the second locking piece 5, which is moved by rearward displacement.

  finger 8 beyond the normal end of its

  rearward placement. In this second form of reali-

  tion, the unlocking means B and C are actuated sub-

  dination to drive the drive shaft 6, so as to

  to operate a sfr operation and a simple structure. The unlocking means B and C may however be made of any

other appropriate way.

  The operation of the above device according to the present invention will be described below with reference to the embodiment of FIGS. 3A to 3D. If, in the state represented by FIG. 3A, the drive shaft 6 is rotated in the extralight direction of the drawing by means of a suitable mechanism

  which will be described later, the control finger 13 of the first

  The first locking piece 4 is pushed by the profile of

  14 to pass the locking piece 4 from the inclined position to the right position against the action of the spring of

24-79683

  reminder 7, which releases it from taking with the driving rod

  2, as shown in fig.3B. If we run more

  the drive shaft 6 in the same direction, the ergot of

  8 formed on the drive shaft 6 pushes the

  this drive 3 by its first side mentioned above against the action of the return spring 7. As the driving part 3 is pushed in this way only one side, to move towards the

  left of the drawing in its inclined state, it blocks the

  trice 2 by acting on the principle of tilting

  sound or self-blocking to drive the latter to the left

  by drawing it out of the support cylinder

  In this case, the second locking part 5 is inclined

  born under the effect of the locking spring 10, being in contact with the driving rod 2, but, as the driving rod 2 moves in the direction (to the left in the drawing) giving rise to the rectification of the second locking piece 5 inclined, the driving rod 2 is not blocked by the second piece

  blocking 5, which does not oppose its movement.

  Once the driving part 3 has been advanced in this way to the end of its stroke, as shown in FIG. 3C, the drive shaft 6 is rotated.

  in the other direction in order to bring back the ergot of training

  8, and this has the effect of returning the coin of

  3 at the starting point of its forward travel stroke under the action of the return spring 7. In this case,

  as the training part 3 is held on one side by the er-

  training drive 8 which is in the process of returning to

  it is inclined in the same way as in the case of a

  forward movement under the effect of the return spring 7.

  However, as the driving pin 8 is returned in the direction giving rise to the straightening of the inclined drive part 3, the latter is not blocked by the drive rod 2, and is therefore not not prevented from going back. In this case, while the second blocking part 5 did not block the drive rod 2 in the direction of travel

  before it was driven by the movement.

  of advancement considered above that the training

  3, it now locks the drive rod 2 in the other direction by acting on the principle of tilting

  to prevent it from moving in the latter direction, that is,

  say to the right. Thus, during the movement of advancement of

  the training part 3, there is first clearance of the first

  first locking piece 4 to give rise to a movement of

  the driving rod 2 is prevented from coming back by the second locking piece 5. Consequently, the reiteration of the forward and backward movement of the driving rod 2, while during the rearward movement, the driving rod 2 is prevented from returning by the room

  5 makes it possible to progress steadily

  bare the driving rod 2 in the opposite direction to the reaction of the

  load, by gradually pulling it out of the

  port 1. In the arrangement of fig.3A to 3D, for training

  of the driving rod 2 in this way, when the driving chamber

  5 is brought back, the drive pin 8 has

  dyes a position in which he stops before pushing

  the unlocking rod 15, so that the second piece of blocking

  inclined cage 5 can not come in the right position by pi-

  Votively under the action of the release rod 15.

  If the driving shaft 6 is then rotated so as to bring the driving pin 8 farther back

  beyond the normal end of its return stroke to the

  the back side of it comes into contact with the

  Unlocking age 15 (FIG. 3SD). As a result, the second locking piece 5, bearing on the frame at an intermediate point, comes into a straight position by pivoting under the action of the unlocking rod 15 acting in opposition to the action of the locking spring 10, and it stops blocking the drive rod 2. Under these conditions, the driving rod 2 can move in

  the opposite direction to its sense of moving motor, to move

  in the direction of reaction of the load as shown, and retract towards the inside of the support cylinder 1. As

  described above, when the driving rod 2 is driven, the er-

  The driving pin 8 stops at a position where it can not yet push the release pin 15, and for the return of the driving rod 2, the driving pin 8 retreats beyond this position. 'stop. To obtain this results we

  may for example have an appropriate stop corresponding to

  this with the stop position, so that this stop is a "-

  during driving to prevent movement to t-back, and that it is rendered inactive during the return /% 0 of the drive rod 2 to allow the move- to-t

  I back. Alternatively, the load of a resistor can be applied.

  fate, etc. when moving backwards beyond the po-

  stopping position, so that the driving pin 8

  can be stopped in the above-mentioned stopping position by the

  age during training, and that it can be moved farther backwards by a f'orce superior to the load during the return. Any other arrangement can be easily adopted for

obtain such a result.

  The operating device according to the present invention provided with such an arrangement is associated with the lifting mechanism of the plate or bed base 17 of a bed 16, etc. Figs. 4A and 4B show an exemplary embodiment in which the foot of

  support cylinder 1 is adapted to a bed frame 18,

  as the end of the driving rod 2 is coupled to a lifting member 20 disposed below a portion or element

  movable plate 19, so that the application of a movement

  The reciprocating member 3 extends the drive rod 2 out of the support cylinder 1 by lifting the movable platen member 19 by pivoting it under the action of the lifting member 20 acting in the

  opposition to the force of gravity. In this example of reali-

  tion, the drive shaft 6 expressing a movement of

  back and forth to the workout piece 3 can be me by a lever

  21 directly adapted to the drive shaft 6, as shown in FIG.

  felt by fig. 'AT. Alternatively, the lever 21 can be ac-

  coupled to the drive shaft 6 via a medium

  appropriate transmission mechanism M such as a linkage, the lever 21 being disposed in a suitable locationb below

  of the bed 16, as shown in FIG. 4B. Fig. 4C represents

  There is another embodiment example in which the bed frame 18 and a base 22 are connected by parallel rods 23.

  to raise and lower the parallel frame 18

  to itself, a crank arm

  d being secured to one of the parallel rods 23 however

  that the end of the driving rod 2 is connected to the arm of

  level 24 and that the foot of the support cylinder 1 is connected to

  In this embodiment, the lever 21,

  placed in a suitable location as described in the previous example.

  is used, to ensure the extension of the

  i0 trice 2 out of the support cylinder I to raise the bed frame 18 parallel to itself in opposition to the action has gravity. The lifting of the plate 17 can be ensured by

  a lifting mechanism of any other type or arrangement, suitable

  prayed. In the lifting mechanism mentioned above is dis-

  placed in a suitable position a 3D elastic means (ig.IA) intended to urge the plate 18 (that is to say the element of

  movable platen 19, the bed frame 18 upwards. On the

  sin, the elastic means S is disposed in the support cylinder

  between the latter and the driving rod 2. It may be

  any other suitable location of the hoist mechanism, and may be formed by a coil spring, a pneumatic spring or damper, or by an elastic means of any

  other species. When the unlocking means C is not action-

  born in the sense of unlocking, the load of the tray '17 is applied

  to the driving rod 2 via the mechanism of

  lifting, but the driving rod 2 is blocked by the second part

  blocking 5, acting on the principle of blocking by means of

  clinching, and thus supports the load. On the other hand,

  that the unlocking means C is actuated to move from the inclined position to the right position the second piece of

  blocking 5, the blocking operated by the latter ceases, allowing

  both at the driving rod 2 of Stre retracted into the support cylinder 1. In this state, the plate 17 can be lowered, but since it is urged upwards by the elastic means S provided in the lifting mechanism, it can not be lowered. does not go down abruptly, which saves the patient resting on it from

  shaken. The force of solicitation not only provides an ef-

  damping effect for the descent of the plate 17, but also a reduction effect of the manual effort necessary to raise

  the tray 17, as indicated above. For example, we can

  to give this manual effort a minimum by giving the force of

  price equal to the load on the tray 17. However,

  However, the fact of giving such a large value to the biasing force may have the disadvantage of giving rise to a spontaneous rise of the plate 17 under the action of the force of force.

  solicitation when the patient leaves the tray 17, in re-

  thus letting the load. However, appealing

  the invention, in addition to the second locking piece, to the first locking piece 4 to prevent the

  to move forward while the training room

  Step 3 is at a standstill.

  spontaneous plateau 17 under the sole action of the force of

  mentioned above, which is an important feature

  aunt of the invention. Especially if the unlocking mechanism B

  intended to actuate the first locking piece 4 is the

  cam thread 14 formed on the drive shaft 6, as shown in FIGS. 3A-3D, for automatically bringing from its inclined position to its straight position the first locking piece 4 immediately before that the workout piece 5

  moved by the rotation of the drive shaft.

  6, the structure as well as the operation are very simple, and one thus obtains a maneuvering device whose handling is very simple and which is free from risks of false maneuvering. However, as shown in FIG. 2, the first and second locking pieces 4 and 5 may well be

  heard to be controlled independently of the rotation of the

  6. In the above description, the stem

  2 is arranged so that its driving by the driving part 3 makes it leave the support cylinder

  1, but it goes without saying that it could, on the contrary, be

  to be driven by the drive part 5 in the direction of its retraction towards the inside of the cylinder of

support 1.

  As described above, the present invention makes it possible to

  to overcome the displacement in one direction of the driving

  load in a discontinuous and gradual manner by rotating the drive shaft back and forth,

  rationally implement the principle of

  clinaison. Consequently, in its application to the lifting mechanism of the bed of a bed, for example, it presents the

  next big benefits. (I) Since the structure is very simple

  and that it is not large, the mechanism

  lifting the tray can be made very simple. (2) Comparative

  to the maneuvering device at. female thread

  with a male thread, the dissipation of work due to friction is low, which makes it

  maneuver. (3) Since the drive shaft only needs e8-

  be subjected to a rotation back and forth, the maneuver of the-

  it is simple. In addition, if the lever is constituted by a pedal, the hardness of uplift maneuver tO can be reduced. (4) If the lifting mechanism is equipped

2479685

  an elastic means acting in the direction of uprising of the plate, the shock of the descent of the plate can be attned, and the manual effort of uplift of the plate can be revdudu lower. Moreover, even if the patient leaves the plateau, the patient is prevented from spontaneously recovering under the

  the biasing force of the elastic means. (5)

  the structure is simple, the manufacture is easy and little prone to defects, the device suitable for being

  achieved with a low cost price.

REIV.TDICATIONS

  1 .-: Maneuvering device for the lifting, and the

  lowering of the tray (17) or bed base (18) of a bed (16) or other sleeping or rest furniture, characterized in that it comprises a support cylinder (1) containing a driving rod

  (2) extensible and having at one end

  driving and blocking (A) of said driving rod, said driving rod (2) cooperating with a drive member (3) mounted floating so as to be able to move and with

  first and second locking pieces (4,5) mounted

  so as to be pivotable while being each retained by one of their sides in said driving section and

  (A), a drive shaft (6) disposed proximally

  tee of one. first of the sides of said driving part (3),

  A driving pin (8) for pushing said piece of

  (5) by said first side thereof in opposition

  to the elasticity of a return spring (7), said spring lug

  traling (8) being formed on said drive shaft (G) so as to allow said workpiece (3) to be

  2O is moved forward by said driving pin and towards the

  by the said return spring (7) and to tea-

  driving geometry (2) under the action of the forward movement of the-

said drive part, said first and second locking parts (4,5) being inclined by locking springs

  (9, 10) to remove the freedom of movement

  driving said driving rod (2) forward and rearward respectively, and respective unlocking means (3, C) arranged so as to enable a straight position to be brought into position.

  respective locking pieces (4,5) inclined to restore

  _3 and thus the corresponding freedom of movement of said

driving rod (2).

  2.- Maneuvering device for the uprising and the

  lowering of the tray (11) or bed base (18) of a bed (16) or other sleeping or resting furniture, characterized in that it comprises a support cylinder (1) containing an extensible driving rod (2) and presenting at one of its extremities a

  driving and locking section (A) of said driving rod

  it, said drive rod cooperating with a drive member (3) mounted floating so as to be movable and with a first floating mounting piece (4) so as to 1i

247968 5

  to be able to rotate while being held by one of its sides in the-

  said driving section and blocking, a return spring (7) of said drive member disposed between said drive member and said first locking member, a drive shaft (6) disposed near the a first of the c8-tees of said training piece, a training pin

  (8) for pushing said workpiece by said first

  first side thereof in opposition to the elasticity of said return spring (7), said driving pin being formed on said

  drive shaft so as to allow said workpiece to

  tra nement of being moved forward by said ergot

  rearwards by the said return spring and at the same time

  said driving rod under the action of the irons movement in front of said driving piece, said locking piece (4) having a control portion (13) formed thereon in the direction of said drive shaft so as to to be brought

  lastically in contact with said drive shaft by means of

  said return spring, a cam profile (14) formed on said drive shaft so as to make it possible to maintain inclined or to disengage from its inclined position said first piece of

  blocking to constitute thus the means of unlocking Liclinai-

  sound of said first blocking part, said section of entral-

  Furthermore, the locking and locking device is provided with a second

  blocking member (5) mounted floating therein so as to be pivotable by being retained by one of its sides as well as a locking spring (10), said first

  (4) and second (5) locking pieces being respectively

  clinched by said return spring (7) and said locking spring (10) to suppress freedom of movement

  said driving rod respectively forward and

  while said drive member is stopped, and releasing means (B, C) respectively arranged so as to allow to bring in a right position a respective one of the inclined locking pieces thereby restoring the freedom

  corresponding movement of said driving rod.

  3. Maneuvering device according to claim 1,

  characterized in that wires (11, 12) are fired at said first

  first and second locking pieces (4, 5) so as to enable

  to pass said locking pieces of the position i-

  0 clined to the right position under the action fedits' them.

13 2479686

  1 -.- Operating device according to one of the claims

  1 and 5, characterized in that an elastic means (S) is arranged

  in said support cylinder (1) between said support cylinder

  port and said driving rod (2) so as to urge said drive rod in the driving direction thereof by the

coaching room. -