FR2625883A1 - DEVICE FOR ADJUSTING THE INCLINATION AND / OR HEIGHT OF A WORKTOP OR TABLE OF A FURNITURE - Google Patents

Abstract

The adjustment device comprises two lifting elements 109, 109 'juxtaposed in the form of curved racks, each of which engages with a toothed wheel 116 of a drive mechanism and is guided in a guide slot 107, 111.

Description

Device for adjusting the inclination and / or height of a plane of

  work or table of a piece of furniture The invention relates to a device for adjusting the inclination and / or height of a work or table surface, with a lifting element acting on the work surface or

  table and attached to a drive mechanism.

  Well-known adjustment devices of this kind make it possible to adjust the inclination and / or the height of the plane of

  work or table furniture. The lifting element is

  m in extendable lifting clamp by which the plane of tr-

  vail or table can be raised or lowered. When the work or table top is in its low position, the lifting clamp occupies its lowest position in which its branches enclose a wide obtuse angle. Raising the plate therefore requires considerable energy expenditure

  because the relative position of the arms of the

  vage at an obtuse angle results in an unfavorable distribution of forces. In addition, small movements of the clamp

  lifting already lead to a significant stroke of the work plane

  vail or table. For the rest of the displacement operation, the force ratios become more favorable so that the lifting clamp can be maneuvered with less force. However, you only get a short stroke. This well-known adjustment device therefore has an unequal force-stroke ratio. Furthermore, the lifting clamp is sensitive to transverse loads which could easily deform the articulated branches of the lifting clamp. The lifting clamp could then no longer be operated. In addition, the installation of the clamp

  lifting requires considerable volume.

  The object of the invention is to improve the arrangement

  adjustment of the aforementioned genre so that it presents

  an almost constant force-to-run ratio for handling

  simple and compact.

  According to the invention, for the device for adjusting the

  genre above, this goal is achieved by the fact that the provision

  adjustment tif has an additional lifting element,

  that the two lifting elements are juxtaposed and respective-

  formed into curved racks, each of said lifting elements being engaged with a toothed wheel and guided

in a guide.

  With the lifting elements produced in the form of curved racks, it is possible to obtain an almost constant force-stroke ratio over the entire travel of the adjustment device. As a result, the energy expended for lifting is approximately the same for each position of the worktop or table. The race by

  displacement path of the racks is then approxima-

  constantly constant so that the work or table top can be easily and precisely brought into position

  desired. The racks are flawlessly guided

  chable on the guides so that the adjustment can be effective

  done in a simple way. Since the racks can be flat, they can be mounted near a side wall of the cabinet so that they require little space. The rack is a building element

  robust with a long service life. In addition, the

  by rack ensures flexible and precise movement of the worktop and table. When the two lifting elements are actuated simultaneously, the work or table top is moved in height. However, it is also possible to operate only one lifting element. In this case, the work or table top is adjusted in inclination. The two lifting elements or racks thus allow simple and problem-free adjustment in height and tilt. With the two lifting elements it is also possible to ensure

  simple adjustment for countertops or countertops

tively wide.

  According to a particular characteristic of the invention

  tion, it is expected that the rack includes at least one

  guide element by which it is guided on the guide.

  It is advantageous that the guide element is a bolt, a roller or the like which engages in the guide

shaped like a slit.

  Another feature of the invention consists in that the drive mechanism consists of two helical wheels which mesh and whose axes are oriented

  perpendicular to each other.

  In a particular embodiment of the invention

  tion, the rack is supported, on its face opposite to the work or table top, by at least one support element which

  preferably consists of a roller.

  According to another particular characteristic of the

  vention, the adjustment device comprises a synchronization mechanism with a shaft which extends transversely to

  the rack and is coupled with the drive mechanism.

  It is advantageous that the drive mechanism has a shaft end rigidly coupled in rotation

with an intermediate shaft.

  Another feature of the invention is that one of the helical wheels of the drive mechanism

  is rigidly mounted in rotation on the shaft end.

  According to a particular characteristic of the invention

  tion, the rack is covered over most of

its length.

  According to the invention, it is expected that one of the creat-

  Maillères is guided so that it can be moved with one of its ends on a trim plate and with the other end on a rail attached to the worktop or

of table.

  It is advantageous that the trim plate pre-

  feels a slit which extends in the longitudinal direction of the

  said plate and in which one of the racks engages

with the guide element.

  According to a particular characteristic, the rail pre-

  feels a slot curved in a partial circle in which one

  racks engage with the guide element.

  Another feature of the invention consists in that the other rack is guided in a mobile manner, with one of its ends, on the rail, preferably in a slot curved in a partial circle, and articulated with its other

  end on the trim plate.

  According to another particular characteristic of the

  Please note that it is intended that the racks can be moved

  roughly synchronized in opposite directions.

  Another peculiarity is that the two

  racks are guided between two pieces of packing.

  It is advantageous that at one of the trim pieces

  either attached an intermediate plate which is located

  ference, between the trim piece and the trim plate

  wise and which can preferably be moved in height with respect to one of the trim pieces and to the trim plate. In a preferred embodiment of the invention, it is provided that one of the packing pieces comprises at least two drive pins which engage in slots in the intermediate plate, which slots extend, from

  preferably in the vertical direction of said intermediate plate

diary.

  A particular feature of the invention

  consists in that, in its lower end position

  lower, the intermediate plate rests on the guide element

  of one of the racks and on the articulation element

on the other rack.

  According to another characteristic of the invention, it is provided that the coupling between the drive mechanism of one of the racks and the control bar can be

  canceled by a coupling device.

  A characteristic feature of the invention consists in that the rack is provided on a toothed segment which preferably has a recess, one of the

edges have teeth.

  A preferred embodiment of the invention is

  characterized in that it comprises two gears which can be coupled by a control bar movable in the axial direction and attached to two coupling members which can be coupled, as desired, with the gears of the gears.

  It is therefore advantageous for the coupling members to

  are mounted on the control bar.

  According to a particular characteristic of the invention, it is expected that the transmission of the gear to the

  gear wheel of the lifting element comprises at least one

  cylindrical spell as a means of force transmission.

  A particular embodiment of the invention is characterized in that the cylindrical spring is secured, with one of its ends, with one of the toothed wheels of the gear and, with the other end, with a ring brake mounted rigidly in rotation on the drive shaft, and that said gear wheel is

  rotatably mounted on the drive shaft.

  It is advantageous that on the braking ring is arranged a clamping ring which makes it possible to block the braking ring and which can be brought, preferably by a

  operating rod or by a motorized drive system

  laughed, from the clamping position to a release position.

  According to a particular characteristic of the invention

  tion, it is expected that the cylindrical spring surrounds the shaft

of transmission.

  Another advantageous feature of the invention consists in that the two gears and the two lifting elements are connected, by two drive shafts, to two additional gears and lifting elements, and that

  each drive shaft carries, rigidly in rotation-

  tion, a brake ring which can respectively be locked

quée by a clamping ring.

  A preferred embodiment of the invention is

  characterized in that at least one coupling member is provided between the two clamping rings by means of which an operating rod can be coupled, as desired, with the two clamping rings or with only one of said rings, and which is preferably made up of a spindle moving transversely from the operating rod and engaging, in the coupling position, in a slot in

  coupling members of the clamping rings.

  According to a particular characteristic of the invention

  tion, the control rod can be moved axially by means of a motorized or magnetic drive system. It is advantageous that the control bar can

  be rotated by a control motor.

  The following description, next to the drawings

  appended as nonlimiting examples, will allow

  understand how the invention can be put into practice.

  FIG. 1 represents a view of a first embodiment of the adjustment device according to the invention, along the line I-I in FIG. 3;

  Figure 2 shows a bottom view of the device

adjustment of fig. 1;

  FIG. 3 represents a cross section of the device

  positive adjustment of fig. 1; FIG. 4 represents the adjustment device of FIG. 1 with tilting of the worktop of a piece of furniture; FIG. 5 represents the adjustment device of FIG. 1 with height adjustment of the cabinet worktop; Figure 6 shows another embodiment

  a lifting element of the adjusting device according to the invention

  tion; FIG. 7 represents a partial bottom view of another embodiment of the adjustment device according to the invention; FIG. 8 represents a side view of the adjustment device of FIG. 7;

  FIG. 9 represents a cross section of the device

  positive adjustment of fig. 7; Figures 10 to 12 show, in accordance with Figs. 7 È -_ another variant of an adjustment device according to the invention; Figures 13 to 15 show ,, in accordance with Figs. 7 to 9, another variant of the adjustment device according to the invention; Figures 16 to 18 show, in accordance with Figs. 7 to 9, another variant of the adjustment device according to the invention.

  The adjustment device is used for tilt adjustment.

  sound and / or height of a worktop or table from one-

furniture, table or the like.

  In the embodiment according to FIGS. 1 to 5, the adjustment device comprises an L-shaped trim plate 101 which rests with a horizontal branch 102 on

  a base, a frame element 103 and the like. The green branch

  ticale 104 is placed parallel to the inner face 105 of the frame element 103. Near its lower edge

  106, the vertical branch 104 is provided with a slot 107 orient-

  tee in the longitudinal direction of the branch (fig. 1) and provided

  at the posterior end of branch 104, seen from the use

  guard sitting in front of the furniture. In the slot 107 is guided a guide element 108 made, preferably, in the form of a bolt and fixed to one of the ends of a lifting element 109 shaped as a rack. As in the previous embodiments, said rack is curved in

  partial circle at an angle of less than 180. To the other ex-

  extremity directed towards the user seated in front of the furniture,

  rack 109 is provided with an additional guide element

  110 made, preferably in the form of a bolt

  engaging in a slot 111 formed in an inter-

  medial 112 and curved in accordance with the rack 109. The slot 111 extends only over part of the length of

rack 109.

  In the immediate vicinity of rack 109 is pr--

  view a second rack 109 ′ which is also e! iL curved in a partial circle and extends over an arc of less than 180. The rack 109 'is provided with a guide element 110', of

  preferably in the form of a bolt, which is located in the immediate vicinity

  diat of the guide element 110 and engages in a curved slot 111 'in the intermediate plate 112. The slot 111' has the same curvature as the rack 109 'and extends

  over less than half the arc length of the rack.

  The other end of the rack 109 'is articulated on the

  vertical branch 104 of the trim plate 101.

  As shown in fig. 1, the racks 109,

  109 'are arranged in mirror image. In addition, they extend

  tooth on the same angular range and each have a convex curvature with respect to the work or table top

113 of the furniture.

  The two racks 109, 109 'are respectively

  supported, on their convex face directed towards the work plane

  vail 113, by at least one support roller 114, 114 '. On the opposite side, the racks 109, 109 ′ are provided with a toothing, 115 ′ which preferably extends from the end of the rack having the guide element 110, 110 ′,

  over more than half the length of the arc of the cremail-

  era. It is engaged with a toothed wheel 116, 116 'which is rigidly mounted in rotation on a shaft end 117, 117'. By means of a connector 118, 118 ′, this end of the shaft is made to rotate with a transmission shaft 119, 119 ′ which extends to the frame element

103 opposite.

  The two racks 109, 109 ′ are arranged between two vertical branches 120, 121 of two L-shaped rails 122, 123 whose horizontal branches 124, 125 (fig. 3) are fixed to the underside of the work surface 113. The two racks 109, 109 'are guided perfectly between

  the vertical branches 120, 121 of the rails 122, 123.

  The two toothed wheels 116, 116 ′ are mounted in a ma-

  revolving in openings provided in the vertical branches 120, 121. On the side of the branch 121 opposite the branch 120 are fixed two gear boxes 126, 126 '

  in which a helical wheel is respectively arranged

  dale 127, 127 'rigidly mounted in rotation on the

  shaft end 117.117 '. These helical wheels cooperate res-

  pectively with a helical wheel 128, 128 'housed in the

  gearboxes 126, 126 'and of which only the helical wheel

  128 is shown in fig. 3. The two wheels hei-

  licoidales 128, 128 'are mounted on a control bar 129 which extends parallel to the vertical branch 121 of the rail 123 (fig. 2) and up to the seat side of the cabinet. In the

  control bar 129 can be fitted with a crank 130.

  The helical wheels 128, 128 'and the control bar 129 are located in the region above the drive shafts

119, 119 '.

  The control bar 129 allows the simulated actuation

  gears 131, 131 'housed in the gear boxes;

  swims 126, 126 '. In the gearbox 126 'is provided a coupling device 132 using which the gear 131'

  is disengaged in such a way that it does not act during rotation

  control bar 129. For actuation of the

  positive coupling 132, control rod 129 is

  placed in the axial direction, as will be further explained

further.

  The two transmission shafts 119, 119 'located per-

  pendulum to the control bar 129 connect the gear

  swims 131, 131 'with gears of identical construction pre-

  seen on the opposite frame element.

  The intermediate plate 112 is disposed between the vertical branch 104 of the trim plate 101 and the vertical branch 120 of the rail 122. The intermediate plate 112

  has two slots 133, 134 (fig. 1) which extend parallel

  one to the other and in the height direction of the

  intermediate plate and in which engages respectively-

  a guide element 135, 136 fixed on the green branch

  tical 120 of the rail 122 and deviating perpendicularly from the latter.

  In the lowered horizontal position of the work plane

  vail 113 shown in fig. 1, the guide element 108 of the rack 109 is in abutment against the end of the slot 107 directed towards the rack 109 '. The other element of

  guide 110 of the rack 109 abuts against the end

  mity from the curved slot 111 directed towards the rack 109 '.

  The guide element 110 'is applied against the end of

  the slot 111 'directed towards the rack 109. The plate in-

  intermediate 112 is lowered so that it is applied

  quée with chamfered edges 137, 138 against the element of

  guide 108 of the rack 109 and against the articulation axis

  tion 139 of rack 109 '. The guide elements 135, 136 of the rail 122 are then in abutment at the lower end

  slots 133, 134 of the intermediate plate 112. This latter

  the latter is masked by the vertical branch 120 of the rail 122.

  The gear wheels 116, 116 'are arranged at ends

  opposite teeth 115, 115 'of racks 109, 109'.

  To adjust the inclination of the work surface 113 (fig. 1), the control bar 129 is moved axially backwards, seen from the seat side of the cabinet. Because of this, the gear

  131 'is disengaged via the coupling device -

  132. By turning the control rod 129 by means of the crank 130, the toothed wheel 116 is rotated by means of the gear 131. As a result, the rack 109 is moved relative to the rail 122 the along an arc of

  circle. Since rack 109 is guided through

  diary of the guide element 108 in the slot 107 of the trim plate 101, the movement of the rack 109 causes the lifting of the work surface 113 at the end opposite to the seat side. The guide element 135 of the rail 122 is then moved into the slot 133 of the intermediate plate 112 until it abuts on the other end of the slot and then drives the intermediate plate 112 (fig. 4 ). At the opposite end, the intermediate plate 112 is pivotally supported, via its edge

  chamfered 138, on the hinge element 139 of the creation

  mesh 109. At the same time, the rack 109 'pivots around

  of the articulation element 139, but it is not then

  placed relative to the rail 122. The guide element 110 of the rack 109 slides in the slot 111 of the rail 122. The work surface 113 reaches its greatest inclination when the guide element 110 abuts at the end of the

  slot 111 opposite the rack 109 '. Because of the mesh-

  gear wheel 116 with rack 109, the plane

  113 is kept in any position

  cliné, by leaning on the frame element 103 by means of

  diary of the rack 109, of the guide element 108 thereof and of the trim plate 101. In addition, the work surface 113 also bears on the frame element 103 by means of the hinge element 139 and the trim plate 101. The gears 131, 131 'of one of

  frame elements 103 are coupled in drive, by the

  intermediate of the drive shafts 119, 119 ', with corresponding gears on the opposite frame element of

  in such a way that work plan 113 is raised and respected

  uniformly tilted on both sides.

  When it comes to moving the rack also-

  1st 109 'directed towards the seat side of the cabinet, it is first necessary to bring the control bar 129 axially back

  so as to engage the coupling device 132 of the

  grenage 131 '. The two gears 131, 131 'are then action-

  born simultaneously by the control bar 129. Then, the

  two racks 109, 109 'are moved in a syn-

  chrone, roughly in the opposite direction, from the initial position according to fig. 1, the guide element 110 of the rack 109 being moved in the slot 111 of the rail 122 and the guide element 108, in the slot 107 of the plate

  lining 101. The guide element 110 ′ of the other rack

  lère 109 is also displaced in the slot 111 'of the rail 122. In addition, the rack 109' pivots, by means of its articulation element 139, relative to the plate

  lining 101. Due to the movements in opposite directions of the cre-

  meshes 109, 109 ′, the work surface 113 is raised in a uniform manner. Via the guide elements 136 of the rail 122, the intermediate plate 112 is also raised, as soon as the guide elements come into abutment

  at the upper end of the slots 133, 134 of the plate

  intermediate. The upper end position of the work surface 113 is reached when the guide elements 110, 'racks 109, 109' abut against the ends

opposite slots 111, 111 '.

  To bring back the worktop 113, the plate inter-

  medial 112 attached to the guide elements 135, 136 is

  lowered until its chamfered edges 137, 138 come to rest

  draws on the guide element 108 and on the articulation element

  culation 139. The movements are then harmonized in such a way that the intermediate plate 112 comes into abutment only when the guide element 108 is almost in its

  end position according to fig. 1. Due to the utility

  reading of the intermediate plate 112 hooked loosely, a large travel path is obtained without it

  it is necessary that the rail 122 has a particular height

  quite large. This is why, in the lowered position of the work surface 113 (fig. 1), the vertical branch 120 of the bent rail 122 does not protrude downwards beyond the horizontal part of the frame element 103. Seen in the direction

  axial transmission shafts 119, 119 ', the inter-

  112 also lies hidden behind the vertical branch 120. Also in this embodiment, the worktop 113 can be lowered so that it is only a short distance from the built 103, which

  has the effect that the adjustment device is barely visible

sible from the outside.

* Instead of racks 109, 109 ', it is also

  ment possible to use as a lifting element a toothed segment 140 as shown in FIG. 6. He presents

  a recess 141 including one of the edges 142 curved in an arc

  carries the toothing 143. The toothed wheel 116, 116 'cooperating with this toothing partially protrudes from the recess 141. The

  length of the recess 141 corresponds approximately to the length

  teeth 143. The toothed segment 140 comprises, in

  in addition, a receiving opening 144 for the guide element

  108 and respectively the hinge element 139 and a receiving opening 145 for the guide elements and 110 'respectively. The toothed segment has a

  high stability and allows simple manufacturing.

  The adjustment device according to figs. 7 to 9

  again carries a trim plate 201 which is fixed on

  the inner face of a side wall 202. On the wall la-

  opposite facing (not shown) is fixed another covering plate which is identical to the covering plate 201. The inclination and / or height adjustment of the work or table top 203 is carried out by means of two toothed segments 204, 204 'juxtaposed in alignment a short distance from each other. The trim plate 201 is L-shaped and has a horizontal branch 205 by which it rests on the side wall 202 of the base, the frame element or the like. The vertical branch 206 is oriented parallel to the inner face 207 of the frame element 202. Nearby

  from its lower edge 208, the vertical branch 206 is provided with

  a slot 209 extending in the longitudinal direction (fig. 8) which is provided at the rear end of the branch 206, seen from the user seated in front of the cabinet. In the slot 209 is guided a guide element 210 produced, of

  preferably in the form of a bolt attached to one of the ends

  moths of the toothed segment 204. At the other end directed towards the user seated in front of the cabinet, the toothed segment 204 is provided with an additional guide element 211 produced, preferably, in the form of a bolt which engages in

  curved slot 212 of an intermediate plate 213.

  As shown in fig. 8, the edge in the form of a partial circle of the toothed segments 204, 204 ′ directed towards the plate 203 extends over an angle of less than 180. The slot 212 is oriented parallel to the curved edge 214 of the toothed segment 204, but it extends only over part of the length

said edge.

  The toothed segment 204 ′ also has an edge 215 in the form of a partial circle directed towards the plate 203, which extends over an angular range of less than 180. The toothed segment 204 'is provided with a guide element 211' made, of

  preferably in the form of a bolt which immediately borders-

  the toothed segment 204 and engages in a curved slot 212 'in the intermediate plate 213. The slot 212' has the same curvature as the edge 215 of the toothed segment 204 'and it extends over less than half of the length of the arc of said edge. At the other end, the toothed segment 204 'is articulating

  on the vertical branch 206 of the trim plate 201.

  The two toothed segments 204, 204 ′ are arranged in mirror image with respect to each other. Their edges 214, 215 respectively have a convex curvature with respect to

at plate 203.

  The two toothed segments 204, 204 'are respective-

  supported, on their convex face directed towards the plate

  203, by at least one support roller 216, 216 '.

  The toothed segments 204, 204 ′ each have a recess 217, 217 ′ whose edge 218, 218 ′ directed towards the edge 214, 215 is respectively provided with a toothing 219, 219 ′. The edges 218, 218 'are oriented parallel to the edges 214, 215 of the toothed segments 204, 204'. The recesses 217, 217 'are provided in the region of the juxtaposed ends of the segments

toothed.

  In the teeth 219, 219 'meshes respectively

  a gear 220, 220 'rigidly mounted in rotation

  tion on a tree 221, 221 '. The trees 221, 221 'extend

  to the opposite frame element (not shown).

  The two toothed segments 204, 204 ′ are arranged between two vertical branches 222, 223 of two L-shaped rails 224 and 225 whose horizontal branches 226 and 227 are fixed to the underside of the plate 203. The two toothed segments 204 , 204 'are guided perfectly between the

  vertical branches 222, 223 of the rails 224, 225.

  The toothed wheels 220, 220 'pass through the vertical branches 222, 223 of the rails 224, 225 (fig. 9). On the side of the vertical branch 223 opposite the branch 222 are fixed two gear boxes 228, 228 '(fig. 7) in which is respectively disposed a helical wheel 229, 229' mounted on the shaft 221, 221 '. As appears from figs. 7 and 9, the helical wheels 229, 229 'protrude from the gearboxes 228, 228'. Inside the gearboxes, the helical wheels 229, 229 'cooperate respectively with a helical wheel 230, 230'. The two helical wheels 230, 230 'are mounted on a common control bar 231 which extends parallel to the vertical branch 223 of the rail 225 (fig. 7) and up to the seat side of the cabinet. In the command bar

  231 can be fitted with a crank 232. The helical wheels

  dales 230, 230 'and the control bar 231 are located in the

  region above the transmission shafts 221, 221 '.

  The control bar 231 allows the simultaneous actuation

  tane of the gears 233, 233 'housed in the gearboxes

  swims 228, 228 '. In the gear boxes 228, 228 'is provided respectively a coupling device 234, 234' each of which comprises a coupling element 235, 235 'mounted

  rigidly rotating on the control rod 231.

  In the position shown in fig. 7, the elements

  235, 235 'are engaged with the helical wheels

  dales 230, 230 '. As a result, the rotation of the control bar

  mande 231 causes the two wheels to rotate

helical 230, 230 '.

  The control bar 231 can be moved axially-

  relative to the helical wheels 230, 230 '. When the control rod 231 is moved in the axial direction, to the left in FIG. 7, by means of the crank 232, the coupling element 235 'is released from the helical wheel 230'. Therefore, the rotation of the control rod 231 causes the rotary drive only of the helical wheels 229, 230. On the contrary, when the control rod 231 is

  moved to the right, in fig. 7, the coupling element-

  ment 235 is released from the helical wheel 230. In this case, the rotation of the control rod 231 causes only

  the rotation drive of the helical wheels 229 ', 230'.

  Away from the gearboxes 228, 228 ', the transmission shafts 221, 221' respectively carry, rigidly in rotation, a braking ring 236, 236 '

  in which is hooked one end of a cylindrical spring

  drique 237, 237 'which surrounds the shaft 221. The other end of the cylindrical springs 237, 237' is hooked in the helical wheels 229, 229 '. The braking rings 236, 236 'are surrounded by clamping rings 238, 238' which can be

  actuated by a common operating rod 239 (fig. 7).

  The clamping rings 238, 238 'have ends 240, 240a and 240', 240a 'located at a distance from each other (fig. 8) and having aligned bores in which are

  respectively locates a section of net of the rod of ma-

  work 239. The threads in the ends of the service rings

  rage are oriented in opposite directions so that the rotation of the operating rod 239 causes the displacement in opposite directions of the two ends of each clamping ring 238, 238 '. The end of the operating rod 239 directed towards the user of the cabinet is preferably bent in such a way

  so that this end is located in the region of the mani-

  velle 232 of the control bar 231.

  As shown in fig. 7, the clamping rings 238, 238 'are provided with coupling sleeves 241, 242 directed towards each other and traversed by the rod

  operation 239. This can be moved axially with respect to

  port to the coupling sleeves 241, 242. The coupling sleeves

  coupling 241, 242 are provided with slots 243, 244 oriented in the axial direction and crossed by guide pins 245 and 246 which protrude radially from the operating rod 239. These guide pins 245, 246 establish the rigid connection in rotation between the operating rod 239 and the coupling sockets 241, 242. In the position shown in FIG. 7, the two coupling sleeves 241, 242 are rotated by the guide pins 245, 246 during the rotation of the operating rod 239. When the operating rod 239 is moved to the left, in FIG. 18, the guide pin emerges from the slot 244, open at the edge, from the coupling sleeve 242 so that, when

  the rotation of the operating rod, only the bushing

  coupling 241 is rotated. When the operating rod 239 is moved to the right, in FIG. 7, the guide pin 245 is released from the slot 243, open at

  edge, of the coupling sleeve 241 so that

  nant the rotation of the operating rod 239 does not result in

  rotation than the coupling sleeve 242.

  Usually the clamping rings 238, 238 'are

  are in their clamping position in which they

  tighten the brake rings 236, 236 'securely. Both

  cylindrical springs 237, 237 'serve as equilibrium devices

  release of weights which allow to absorb and respectively

  to compensate for the weight of the plate 203 during movement.

  Depending on the weight of the plate 203, the preload of the cylindrical springs 237, 237 'can be adjusted simply by means of the gears 233, 233'. For this purpose, it suffices to turn the control rod 231 with the crank 232 in the corresponding direction. When the two coupling devices 234, 234 'are in the coupling position as in FIG. 7, the rotation of the control bar 231 rotates the two helical wheels 230, 230 '. Therefore, the helical wheels 229, 229 'engaged therewith and rotatably mounted on the shafts 221, 221' are rotated. Since one of the ends of the cylindrical springs 237, 237 'is hooked in these wheels

  229, 229 ', the prestressing of the cylinder springs

  is increased or decreased depending on the direction of rotation.

  The brake rings 236, 236 'in which are hung

  the other ends of the cylindrical springs 237,

  237 'cannot be turned during this operation.

  sliding because they are retained by the clamping rings

238, 238 '.

  When the plate 203 has to be adjusted in height, the clamping rings 238, 238 ′ are released by turning the operating rod 239. It is then possible to adjust the height of the plate 203. Since the

  brake rings 236, 236 'are no longer locked in rotation

  tion, they are driven by cylindrical springs 237, 237 'prestressed. In addition, since the brake rings 236, 236 'are rigidly mounted in rotation on the shafts 221, 221', these are driven via

  said brake rings 236, 236 '. Thus, the wheels den-

  tees 220, 220 'mounted rigidly in rotation on the shafts 221, 221' and in engagement with the teeth 219, 219 'of the

  toothed segments 204, 204 'are also rotated.

  In the position shown in FIG. 8, the plate 203 is in its lowest position. The toothed wheels 220, 220 'are in abutment at the opposite ends of the

  recesses 217, 217 'in the toothed segments 204, 204'.

  The guide element 210 of the toothed segment 204 is applied against the end of the slot 209 in the vertical branch 206 of the lining plate 201, which is directed towards the toothed wheel 220. When the toothed wheels 220, 220 'are rotated as described above, the toothed segments 204, 204 'are pivoted upwards and in opposite directions. The toothed segment 204 'then pivots about the axis 247 by which the toothed segment 204' is articulated, at its end opposite to the toothed segment 204, on the vertical branch 206 of the lining plate 201. Simultaneously with this pivoting movement, the guide element 211 'is moved into the slot 212'. The other toothed segment 204 also pivots upwards,

  the guide element 210 being moved in the horizontal slot-

  tale 209 of the vertical branch 206 of the trim plate

  sage 201. The two toothed segments 204, 204 ′ rotate uniformly

  mement so that the plate 203 is moved horizontally in height. Through the trees 221, 221 ', the

  cogwheels provided on the other frame element (not shown

  felt) are also turned. As soon as the desired height of the plate 203 is reached, the operating rod 239 is turned in the opposite direction, which has the effect that the clamping rings 238, 238 'again enclose the brake rings 236, 236' in such so that the shafts 221, 221 'can no longer be rotated. The operating rod 239 is maintained

  on the furniture in a manner not shown.

  When the plate 203 must be inclined, one begins by moving the operating rod 239 axially in the desired direction so that either the guide pin 245, or the

  guide pin 246 is engaged with the ac-

  corresponding coupling 241 and respectively 242. Then, the operating rod 239 is turned and the corresponding clamping ring 238 or 238 ′ is released by means of the coupling sleeve respectively in engagement 241 or 242. By means of the prestressed cylindrical spring 237 or 237 ', the respective shaft 221 or 221' is rotated with the associated toothed wheel 220 or 220 '. In this way, only one of the two toothed segments 204, 204 ′ is pivoted, which causes

the inclination of the plate 203.

  To adjust the preload of the cylindrical spring considered for the inclination adjustment of the plate 203, the control rod 231 can be moved axially in the desired direction so that the coupling element 235 or the coupling element 235 ' is in engagement with the helical wheel 230 or 230 '. By turning the control bar

  231, the respective cylindrical spring 237, 237 'is then pre-

  constrained as described, with brake rings

236, 236 'blocked.

  During the adjustment operation, the clamping rings 238, 238 ′ are released sufficiently for an adjustment to be made.

done be assured.

  The plate 203 has its maximum inclination when the guide element 211 of the toothed segment 204 abuts against the end of the slot 212 of the intermediate plate 213 opposite the toothed segment 204 '. Due to the engagement of the gear wheels 220, 220 'in the teeth 219, 219', the plate 203 is securely held in any tilt position. It then relies on the element of

  frame 202 via the toothed segment 204, the element

  guide 210 of the latter and of the lining plate 201. In addition, the plate 203 also rests on the frame element by means of the axis 247 of the toothed segment 204 ′ and of the plate lining 201. The highest end position of the plate 203 is reached when the guide elements 211, 211 'of the toothed segments 204, 204'

  abut against the opposite ends of the slots 217, 217 '.

  Plate 203 can also be moved in trans-

  lation in the vertical direction when it occupies a position

  tilted. To do this, simply bring back the rod of ma-

  work 239 from its axial displacement position to the middle position shown in FIG. 7. Then by turning the operating rod 239, the two clamping rings 238, 238 ′ are released again so that the two toothed wheels

  220, 220 'are turned in the opposite way as described -

  by means of cylindrical springs prestressed

  such that the two toothed segments '204, 204' are moved? -

  as described in the opposite direction. Plate 203 made

  then kills a translational movement while maintaining its posi-

respective inclined tion.

  35. The embodiment according to FIGS. 10 to 12 differs from the embodiment described above only in that separate operating rods 239a, 239b are

  provided for brake rings 236, 236 '. They allow

  try to operate as described the clamping rings 238, 238 'placed on the brake rings. Brake rings 236, 236! can be much longer than in

  the previous embodiment. They are also covered

  rigidly bent in rotation with the shafts 221, 221 '.

  To adjust plate 203, the clamping rings

  rage 238, 238 'are released with the operating rods

  239a, 239b. Then, the toothed segments 204, 204 'are moved

  as described by the cylindrical springs pre-

  forced. Since in this embodiment separate operating rods 239a and 239b are provided for the clamping rings 238 and 238 ', it is no longer necessary that the operating rods can be moved in the axial direction. When the plate 203 is displaced in height, the two operating rods 239a and 239b are turned in order to unlock the clamping rings 238 and 238 '. When the plate 203 must be inclined, the operating rod 239a is turned

  or 239b depending on the direction of the tilt. Furthermore, the re-

  the plate 203 is glued in the same way as in the former

  exemplary embodiment according to fig. 7 to 9. Since

  the operating rods 239a, 239b must not be mo-

  bile in the axial direction, they can be of a very simple construction, just as they can be assembled of a

  simple way with the clamping rings 238, 238 '.

  In the exemplary embodiment according to FIGS. 13 to

  , a motorized drive mechanism 248, 248 'is respected

  tively provided for the clamping rings 238, 238 ', in place of the operating rods. Can be provided as motorized drive mechanisms for servomotors,

  control electromagnets and the like which can be activated

  by the side of the cabinet facing the user. The

  motorized drive mechanisms 248, 248 'include res-

  pectively a threaded pin 249, 249 'which engages in the threads of the ends 240, 240a, 240' 240a 'of the clamping rings 238, 238'. Furthermore, this exemplary embodiment

  is identical to the embodiment according to FIGS. 7 to 9.

  With motorized drive mechanisms 248, 248 ', the clamping rings 238, 238' can be easily operated

when adjusting plate 203.

  In the exemplary embodiment according to FIGS. 16 to 18, the control rod 231 is driven by a motor, just as its axial movement is controlled by a motor. One of

  ends of the control rod 231 is connected to a met

  motorized displacement mechanism 250 which is a jack and by which the control rod can be moved in the direction

  axial. At the other end, the control bar 231 is cut

  fitted with a 251 control motor which allows the rotation of

the control bar 231.

  The control motor 251 comprises a driving sleeve

  drag 252 in which exceeds the control rod 231.

  The drive bush 252 is provided with an axial slot 253 in which engages a guide pin 254 which diverges radially from the control bar. The slot 253 has such a length and the guide pin 254 is provided in such a way on the control bar 231 that the coupling between the drive bush 252 and the control bar 231 is ensured in any axial position from the bar

  ordered. The control bar 231 again carries the elements

  coupling elements 235, 235 'which can be engaged

  as described with the helical wheels 230, 230 '.

  For this embodiment, no cylinder spring

  drique was not expected. The rotation of the toothed wheels

  220, 220 'is done, on the contrary, directly by the wheels

  licoidals 229, 229 '. These are rigidly mounted in rotation on the shafts 221, 221 '. Depending on the axial position of the control bar 231, the two toothed wheels 220, 220 ', or only one of the two toothed wheels, are driven in

  rotation so that, as a result, the two segments den-

  tees 204, 204 ', or only one of these toothed segments, are pivoted. It is not absolutely necessary that the control motor 251 be disposed at one of the ends of the control bar 231. For example, it can also be provided in the region between the two gears 233, 233 ', like this

  is shown in fig. 16 by dashed lines.

  In this case, the motor shaft 255 of the control motor 251 is coupled with the control bar 231 via a

  bevel gear 256 which allows axial movements of the

said command bar.

  For the embodiments described, the toothed segments can also be replaced by racks

curved in a partial circle.

Claims (29)

  1. - Device for adjusting the inclination and / or height of a work surface or table, with an element   lifting acting on the work or table top and rat-   attached to a drive mechanism, characteristic that the adjustment device includes an additional lifting element (109, 109 ', 140, 204, 204'), that the two lifting elements are juxtaposed and respectively shaped as curved racks, each of which is engaged   with a toothed wheel (116, 116 ', 220, 220') of the drive mechanism   dragging (131, 131 ') and respectively guided in a guide   dage (107, 111, 111 ', 209, 212, 212').   2. - adjustment device according to claim 1, characterized in that the rack (109, 109 ', 140) comprises at least one guide element (108, 110, 110', 210, 211,   211 ') by which it is guided on the guide.   3. - Adjustment device according to claim 2, characterized in that the guide element (108, 110, 110 ', 210, 211, 211') is a bolt, a roller or the like which engages in the guide shaped like a slit (107, 111, 111 ', 209, 212, 212 ').   4. - Adjustment device according to one of the claims   1 to 3, characterized in that the drive mechanism (131, 131 ') consists of two helical wheels (127,   128, 127 ', 128') which mesh and whose axes are orient-   tees perpendicular to each other.   5. - Adjustment device according to one of the claims   1 to 4, characterized in that the rack (109, 109 ') is supported, on its face opposite the work or table top (113), by at least one support element (114, 114')   which preferably consists of a roller.   6. - Adjustment device according to one of the claims.   1 to 5, characterized in that it includes a synchronization mechanism (117, 117 ', 119, 119', 221, 221 ') with a   tree (117, 117 ', 119, 119', 221, 221 ') which extends transversely   dirty rack (109, 109 ', 140, 204, 204') and is   coupled with the drive mechanism.   7. - Adjustment device according to one of the claims.   1 to 6, characterized in that the drive mechanism (131, 131 ') has a shaft end (117, 117') rigidly coupled in rotation with an intermediate shaft (119, 119 ').   8 .. - adjusting device according to claim 7, characterized in that one of the helical wheels (127, 127 ') of the drive mechanism (131, 131') is mounted so   rigid in rotation on the shaft end (117, 117 ').   9. - Adjustment device according to one of the claims   1 to 8, characterized in that the rack (109, 109 ',   204, 204 ') is covered over most of its length cheerfully.   10. - Adjustment device according to one of the claims   cations 1 to 9, characterized in that one of the racks (109, 140, 204) is guided so that it can be moved with one of its ends on a lining plate (101, 201) and with the other end on a rail (122, 213)   attached to the work or table plan (113, 203).   11. - adjusting device according to claim, characterized in that the de-garnishing plate (101, 201)   has a slot (107, 209) which extends in the longitudinal direction   tudinal of said plate and in which one of the cremail-   lères (109, 140, 204) engages with the guide element (108, 210).   12. - Adjustment device according to one of the claims   cations 10 or 11, characterized in that the rail (122, 213) has a slot (111, 212) curved in a partial circle in which one of the racks (109, 140, 204) engages with the guide element (110, 211).   13. - Adjustment device according to one of the claims   cations 1 to 12, characterized in that the other rack (109 ', 140, 204') is guided movably, with one of its ends, on the rail (122, 213), preferably in a slot (111 ', 212') curved in a partial circle, and articulated with its other end on the trim plate (101, 201).   14. - Adjustment device according to one of the claims   cations 1 to 13, characterized in that the racks (109, 109 ', 140, 204, 204') can be moved slightly near synchronous in opposite direction.   15. - Adjustment device according to one of claims 1 to 14, characterized in that the two racks (109, 109 ', 140, 204, 204') are guided between two pieces of packing (122, 123, 224, 225).   16. - Adjustment device according to one of the claims   cations 1 to 15, characterized in that one of the trim pieces (122) is attached an intermediate plate (112) which is preferably located between the trim piece   (122) and the trim plate (101) and which can, preferably   rence, to be. displaced in height in relation to one of the feet: es   trim (122) and the trim plate (101).   17. - Adjustment device according to claim 16, characterized in that one of the packing pieces (122) comprises at least two drive knobs (135, 136) which   engage in slots (133, 134) of the intermediate plate   diary (112), which slots (133, 134) 'extend, from pre-   ference, in the vertical direction of said intermediate plate (112).   18. - Adjustment device according to one of the claims   cations 16 or 17, characterized in that, in its lower end position, the intermediate plate (112) rests on the guide element (108) of one of the racks (109) and on the element d joint (139) of the other rack (109 ').   19. - Adjustment device according to one of the claims   cations 1 to 18, characterized in that the coupling between the   drive mechanism (131 ') of one of the racks (109')   and the control bar (129) can be canceled by a device coupling point (132).   20. - Adjustment device according to one of the claims   cations 1 to 19, characterized in that the rack is pre-   view of a toothed segment (140) which preferably has a   recess (141) one of the edges of which carries the toothing (143).   1. - Adjustment device, in particular according to   one of claims 1 to 20, characterized in that it comprises   takes two gears (233, 233 ') which can be coupled by   a control bar (231) movable in the axial direction and rat-   stained with two coupling members (235, 235 ') which can be coupled, as desired, * with the toothed wheels (230, 230 ') of the gears (233, 233').   22. - Device according to claim 21, character-   risé in that the coupling members (235, 235 ') are   mounted on the control bar (231).   23. - Adjustment device, in particular according to   one of claims 21 or 22, characterized in that the   transmission from the gear (233, 233 ') to the toothed wheel (220, 220') of the lifting element (204, 204 ') comprises at least one cylindrical spring (237, 237') as a means of transmitting strength. 24. - Adjustment device according to claim 23, wherein the gear is coupled with another gear via a transmission shaft, characterized in that the cylindrical spring (237, 237 ') is secured, with one of its ends, with one of the toothed wheels (229, 229 ') of the gear (233, 233') and, with the other end,   with a braking ring (236, 236 ') mounted in a ri-   gide in rotation on the drive shaft (221, 221 '), and that said gear (229, 229') of the gear (233, 233 ') is rotatably mounted on the drive shaft (221, 221 ').   25. - adjusting device according to claim 24, characterized in that on the braking ring (236, 236 ') is arranged a clamping ring (238, 238') which allows the locking of the braking ring and which can be brought in, preferably by an operating rod (239, 239a, 239b) or   by a motorized drive system (248, 248 '), from the   clamping position to a release position.   3.5 26. - Adjustment device according to one of the claims   cations 23 to 25, characterized in that the cylindrical spring   (237, 237 ') surrounds the drive shaft (221, 221').   27. - Adjustment device according to one of the claims   cations 23 to 26, characterized in that the two gears   (233, 233 ') and the two lifting elements (204, 204') are.   connected, by two drive shafts (231, 231 '), to two additional gears and lifting elements, and that each drive shaft (221, 221') carries, rigidly in rotation, a braking ring (236, 236 ') which can respectively be blocked by a clamping ring (238, 238 ').   28. - Adjustment device according to one of the claims   cations 21 & 27, characterized in that between the two rings of   clamping (238, 238 ') is provided at least one coupling member-   ment (245, 246) through which a rod of ma-   work (239) can be coupled, with the choice, with the two clamping rings (238, 238 ') or with only one of the said rings, and which is preferably constituted by a pin deviating transversely from the operating rod (239) and engaging, in the coupling position, in a slot (243, 244) formed in coupling members   conjugates (241, 242) of the clamping rings (238, 238 ').   29. - Device according to one of claims 21 to   28, characterized in that the control bar (231) can be   moved axially by means of a drive system   motorized or magnetic (250).   30. - Adjustment device according to one of the claims   cations 21 to 29, characterized in that the control bar   (231) can be rotated by a control motor (251).