FR2532025A1 - CONSTRUCTION INCLUDING A GAS SPRING - Google Patents

Abstract

IN THE FORMS OF EXECUTION OF THE INVENTION A BACKREST 16 IS ARTICULATED TO THE SEAT 10, 20 OF AN ARMCHAIR. IN ORDER TO VARY THE INCLINATION OF THE BACKREST 16 A GAS SPRING 22 IS SWIVELY CONNECTED TO THE BACKREST 16 AND TO THE SEAT 10, 20. BY VARIING THE LENGTH OF THE GAS SPRING 22 THE INCLINATION OF THE BACKREST 16 CAN BE ADJUSTED. SPRING 22 MUST BE STATED IN A VERY LIMITED SPACE UNDER SEAT 20 AND BACKREST 16. SPACE FOR MOUNTING SPRING 22 IN THE ARMCHAIR IS ALSO LIMITED. IN ORDER TO EASILY INSTALL THE GAS SPRING 22 IN THE ARMCHAIR DESPITE THE LIMITED SPACE, A PIVOT JOINT 48 CONNECTING THE GAS SPRING 22 AND THE CONSTRUCTIVE PART 10 OF THE ARMCHAIR INCLUDES A HINGE PIN 50 AND A PIN HOUSING 64 HAVING A SENSITIVELY U-SHAPED RECESS FOR SHAFT HOUSING. THE UA SHAPED RECESS AN OPENING IN A CROSS DIRECTION TO THE GAS SPRING 22 AXIS, SO THAT FROM ONE SIDE A CONSIDERABLE FORCE CAN BE TRANSMITTED WITHOUT RISK OF DISENGAGEMENT BETWEEN THE HINGE AXIS 50 AND ITS HOUSING 64, AND ON THE OTHER SIDE THE GAS SPRING 22 CAN BE EASILY MOUNTED IN THE ARMCHAIR.

Description

"CONSTRUCTION INCLUDING A GAS IESSORT"

  The subject of the present invention is a construction comprising a first and a second construction element,

  the second 'being unpleasant compared to the first.

  A gas spring is pivotally connected to the first

  and in the second building element This gas spring has

  takes a cylinder with an axis and soft end walls.

  A cavity 6 is d 6 finished inside the cylinder Jo A rod

  piston extends along the cylinder axis through

  the first wall at the end of the cylinder at the end

  and outside the cavitho Uh - gas oil souz pres-

  sion fills at least part of the cavity The gas spring is connected 6 to at least one of the first o nd construction elements by a joint with pi Yot including 19 articulation axis oot sonibloment rpniu Lrea that of the cylinder. In designed constructions of this type, the pivot joint includes an axis fia to the mounting pin

  respective and an eyelet attached to the respective part of the

  gas outlet, i.e. the cylinder or the piston rod, and this eyelet surrounds the axis and is fixed on it by 6 nuts screwed on the axis Installation of the gas spring Inside of the chair is highly complicated with this

type of pivot joint.

  In the art it is further known to see

  between the gas spring and the respective construction element

  tif, pivot joints shaped like ball joints or sleeves,

  A first object of the invention is to remedy the

  Convenient of these known types of pivot joints and to provide a pivot joint which makes it posuible for easy assembly and disassembly even where the location of the pivot joint

is not accessible.

  Another object of the invention is to provide a pivot joint which allows the transmission of forces 6 raised to

  both in the direction of pressure and traction.

  Yet another object of the invention is to provide a

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  pivot joint allowing significant angular mobility 6.

  According to the present invention the pivot joint comprises

  an axis of articulation and an element to house this axis

  trant at least one recess for housing at least part of this axis of articulation, this recess having a cross section substantially in the form of a U-shaped arc comprising two opposite legs and an opening, one of

  these elements, namely the axis d 9 articulation or its support -

  being assembled with a gas spring, i.e. either at

  piston age either to the cylinder and the other being connected 6 to 6

lmnent of respective construction.

  According to a form of ex 6 cution pr 6 efr & e of the invention, the legs defining the recess are placed on diametrically opposite sides of the axis and the direction of

  the opening is substantially transverse to the axis of the cylinder

  With this construction, the gas spring can be

  connected to the respective building element by simple in-

  production of the articulation axis through the opening in the opening As the direction of the opening is

  substantially perpendicular to the axis of the cylinder,

  these can be transmitted in the direction of the axis of the

  cylinder without risk of disengagement of the articulation axis

  tion with the recess in the housing of this axis.

  In this preferred embodiment, the recess of the axis housing can be defined by a cylindrical hole having an opening directed radially towards the text.

  from the axis of this hole The diameter of the corresponding hole

  lays substantially on the diameter of a substantially oy-

  the axis of the hinge pin in this hole.

  In order to ensure the engagement of the articulation axis

  in the hole in the axle housing, the width of the opening

  ture may be smaller than the diameter of the cylindrical hole

  that in this case the cylindrical part of the axis of articu-

  lation pr 6 feels -at least one flat surface allowing the cylindrical part to pass through the opening only

  in at least one predetermined angular position finished 6 of the

  gas outlet with respect to the respective building element.

  The flat surface can be parallel to the joint axis, With

  this embodiment, the assembly is effected simple-

  by bringing the gas spring into the angular position,

  in which the articulation axis can pass through the

  and enter the cylindrical hole, after which the gas spring is rotated relative to the construction until it is in its operating position Then the other

  end of the gas spring can be connected to the other element

respective construction ment.

  In order to transmit significant forces in the di-

  rection of the cylinder axis, the flat surface is sensitive-

  parallel to the axis of the cylinder.

  The articulation axis can comprise two parts

  cylindrical end adapted to be logaoa daenms Beux & vi-

  respective axis housing and a middle part connected to the piston rod In this case the axis housing is fixed to the respective construction element Dansa the purpose of

  connect this middle part and this piston rod, the ti-

  piston age may have an outer end portion

  ins 6 rée in a socket provided in the middle part.

  In order to d 6 finish exactly the position of the piston rod relative to the axis of articulation, a clamping can be seen in a circumferential groove of the piston rod at its outer end, this ring coming to bear against a goal face 6 e of the articulation axis at the level of the bushing. It must be noted that an exact positioning of the piston rod by

  relation to the axis of articulation is particularly important

  if the gas spring is a locked gas spring,

  ble, in which two working chambers are defined by the piston inside the cavity; these two chambers being connected by a passage and a valve being provided in the piston to open and close this passage, and a rod

  check of the valve being g eid Se through a hole in the ti-

  piston-ge to control the opening and closing of the valve In this case actuation means are provided to actuate the outer end of the control rod projecting beyond the outer end of the piston rod So that these actuating means and that this control rod cooperate exactly, it is necessary to exactly adjust the position of the piston rod relative to the axis of articulation.

  Both possibilities are considered in this in-

  vention, the possibility of fixing the articulation axis to -

  gas spring and axle housing to the building element

  the respective option as well as the other possibility of fixing the axle housing to the gas spring and the articulation axis to

  the respective building element.

  As the construction solution described above with a flat surface of the articulation axis requires a large angular mobility of the gas spring when it is mounted in the construction, that is to say in a chair,

  another construct is also considered 6 e, in the-

  the opening has a width corresponding substantially to the diameter of the cylindrical hole and the fixing means

  are provided to lock the hinge pin in its lo-

  axis bearing In this case the blocking means can

  be applied once the hinge pin has been inserted

  engaged in the axle support, so that the gas spring can be mounted in the construction in any

  angular position relative to it If the axis of arti-

  culation Extends axially in both directions beyond

  there the axis support, the locking means may comprise

  two pairs of fork-shaped arms, each pair of arms engaging with the respective extension of the articulation axis at cft 6 of the axis support. The pairs of arms are connected together by means of connection and these connecting means can be provided with

  fixing to fix the locking means to the axle housing.

  For easy mounting, the fixing means can be engaged by engagement with the axle housing. The fork arms can be provided with profiled notches for

  engage with the extensions of the hinge pin.

  According to yet another less preferred embodiment, the art axis Iculat Ion extends in the axial direction between

  the Legs of Véiemn in the shape of U Ltaxed'articula-

  tion is provided with axial holes at two axial ends and pivots mounted relative to these legs so as to engage in the axial holes O The pivots can

  can be fixed by dioning the derc or mon-

press tees in this accommodation.

  In any case, the invention will be well understood and its

  advantages will become apparent from V'aido from the following description

  with reference to the schematic drawing aennaé representing by way of nonlimiting example 9 several frmes dlex 6 cution of the present invention 9 Figure it is a side view Gn pastel section of a chair according to the inventi on; FIGURE 2 is a view of doses-M & e: Zgure Figure 3 is a view of M la G at 2102 ro I showing the end of a plunger rod connected to the first rinse before being received in a housing unit of this axis, - ,; Figure 4 is a side view of the M housing of the articulation with the axis d 2 articulation of Figure 3 housed therein; Figure 5 is a top view of the axle housing and the axis according to another form of dee-link invention Figure 6 is a sectional view of a Vivnin pivot joint according to another form of axiecut Aon; 9 Figure 7 is a bottom view of the pivot joint of Figure 6

  Figure 8 is a vnue of c 8 tee of the pivot pin joint

safes 6 and 7.

  In FIG. I a seat support E is designated by (10) This seat support (10) is mounted at the upper end of a chair column (12) which may include a gas spring for adjustment in seat support height (10) This gas spring (not shown) can be

controlled by a lever (14).

  a backrest (16) is pivotally mounted on the

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  seat support (10) about a pivot axis (18).

  A seat (20) is detachably attached to the support of

seat (10).

  A gas spring (16) 8 extends between the backrest (16) and the seat support (O 10) The gas spring (â 2) comprises

  a cylinder (24) in which a cavity (26) is defined.

  A piston rod (28) extends inside and outside

  rieur of the cavity (26) A piston (30) is fixed at the end

  inner part of the piston rod (28) The cavity (26) o 10 is filled with pressurized gas and is divided by the piston (30) into two working chambers (26 a) and (26 b) The two chambers (26 a) and (26 b) are connected by a passage

  (32) This passage (32) is controlled by a valve (34) re-

  linked to a control rod 8 the (36) The cylinder (24) is rao-

  strung to an assembling member (38) which is so connected

  pivoting at the back (16) by a pivot axis (40).

  The assembly member (38) is provided with a slot (42) in which is housed an articulation stud (44) fixed to the cylinder (24) The stud (44) is fixed in the slot (42)

  by a fixing sleeve (45) passing through the holes

  gnes of the assembly member (38) and the articulation piton-

tion (44).

  The left end of the piston rod (28) is as-

  similar to the seat support (10) by a pivot joint (48).

  This seal (48) comprises a hinge pin (50) having

  a middle part (52) and two extreme parts (54).

  The end portions (54) are substantially cylindrical

  and have flat diametrically opposed surfaces (56).

  The middle part (52) of the hinge pin (50) is mutually

  nie of a sleeve hole (58) in which is housed the end

  Outer part of the piston rod (28) The piston rod

  tone (28) is fixed to 19 inside this hole (58) by a thread The relative axial position of the piston rod (28) and the middle part (32) of the hinge pin (50) is defined by a clamping ring (60) engaged in a circumferential groove of the piston rod (28)

  and abutting against a hole abutment hole (58).

2532.025-

  Thus the outer end of the control rod 8 le (3 È) is always exactly positioned in relation to the articulation member (50) A locking nut (62) is screwed onto the piston rod (28 ) and is engaged in axis d 8 articulation = tion (50). A U-shaped housing (64) for the axis (50) Omt

  fixed on the seat support (10).

  Holes (66) are formed in the side plates of this axis-shaped housing U-shaped (64), holes which have an opening (68) directed radially 'towards Itextérelur (: figure

  The hinge pin (50) can g tr G mounted in the lo 0-

  axis spindle (64) by inserting radially men in the head (54) in the holes (66) Lber J Their small openings (68), when the flat surfaces (56) are maintained

  paeallalement-here the direction of Vouve ure O Rla crr Go-

  lay in the poaition of ti Sge of piseton (2) and do 1 "& n

  (50) such as 8 'indicated in lioies point: 16 ées d Oans la fisu-

re 1.

  After pivoting dia ress O ort to gas from -do Sa poci-

  dotted lines indicated in figure 19 to its nuanced operating position (with solid lines

  in this figure 1, the ends (54) of the articular = e

  lation (50) can no longer S 90 escape from two holes f 66) du-

  the opening (68) is narrower than the diameter.

  The pivoting connection between the cylinder (24 *) and the backrest (16) is established once the pivoting connection of the piston rod (28) with the seat support (10) has been established. assembly (38) is pre-assembled with the backrest (16) it is assumed that when the chair

  is assembled, the piston rod (28-) is completely

  troduite dan C the cylinder (24 â) of Gorte that the piton dear-

  ticulation (44) can be introduced into the slot (42) of

  the assembly member (38) as well as the fixing sleeve

tion (46).

  Note that you can rotate the rod

  tone (28) of an angle greater than 900 around the axis of arti-

  culation (50) without risk that its ends (54) do not

  escape from their respective holes (66).

  In Figure 5 is shown a second form of reaction

  The pivot joint with a hinge pin (150) and a pin housing (164) The hinge pin (150) extends between the side plates (164 a) of the pin housing (164 ) The hinge pin (150) is pivotally mounted in these side plates (164 a) on pivots (170)

  screwed into the side plates (164 a) by means of file-

  19 stages (164 b) and entering dem axial holes (172) of the articulation axis (150) 6 This embodiment is less preferred because the pivots (170) must be mounted by screwing. We can easily understand, however, the pivots (170) could also be press fitted or otherwise fixed in the side plates

(164 a).

  In Figures 6, 7 and 8 another form is shown.

  embodiment, in which a hinge pin (274) carried by mn smuppo't of a: e (276) is fixed to the seat support (O 10) as shown in Figure 1 An axis housing (278) is connected to the outer end 6 of the rod

  piston (228) The outer end of the control rod 8-

  the (236) is housed inside a eavit 6 (280) of the lo-

  spindle bearing (278) This housing (278) is provided with a cylindrical hole (282) opened by an opening (284) During

  of the assembly, the axis-shaped housing (278)

  chet can simply be engaged over the axis (274).

  To insure the accommodation (278) against any risk of disenchantment

  engagement with the axis (274), mul blocking element (286) is provided This blocking element (286) comprises a split clamping sleeve (288) clamped on the neck part (278 a) of the housing (278) This clamping sleeve (286) carries on each side of the axle housing (278), as shown in FIG. 6 in FIG. 7, a pair of fork-shaped arms (290 a, 290 b) provided with notches (290 c, 290 d) These notches (290 c, 290 d)

  are engaged on the extensions (274 a) of the articulation axis

  lation (274) extending beyond the axis housing (278)

as shown in Figure 7.

  Of course, the present invention is not limited to the sole embodiments described above by way of nonlimiting examples, on the contrary it embraces all the embodiments using them.

equivalent means.

Claims (11)

CLAIMS -   1 Construction of the type comprising: A first construction element (10); B a second construction element (16), displaceable by relation to the first construction element (10); C a gas spring (22) pivotally connected to the first and second construction elements (10, 16), this gas spring comprising: a) a cylinder (24) having an axis and two end walls, c ' is a first and a second end wall and defining a cavity (26); b) a piston rod (28) extending along the axis of the cylinder passing through the first end wall towards the inside and towards the outside of the cavity (26); c) a piston (30) connected to the piston rod (28) inside the cavity (26), and d) a volume of pressurized gas filling at least part of this cavity (26), This spring gas (22) being connected to at least one of the construction elements (10, 16) by a pivot joint (48) having an axis substantially perpendicular to the axis of the cylinder (24), characterized in that this joint pivot (48) includes   a hinge pin (50) and a pin housing (64)   trant at least one recess (66, 68) for housing at least one part (54) of this articulation axis (50), this recess (66, 68) having a defined cross section   by a substantially U-shaped axis comprising two legs   opposite bes and an opening (68), one of these elements, namely the hinge pin (50) or its housing (64), being assembled with the gas spring (22), that is to say is   To the piston rod (28) or to the cylinder (24) and the other-   of these elements (50, 64) being connected to the element of cons- respective truction (10).   2 Construction according to claim 1, character-   laughed at in that the legs are placed on diagonal sides   opposite the axis (50) and in that the direction   tion of the opening (68) is substantially transverse to the axis of the cylinder (24).   3 Construction according to claim 2, character-ized in that the recess (66, 68) danrs axis housing   (64) is defined by a cylindrical hole (66) having one or   vertex (68) directed radially green-1 Jextirieur from Lr of the axis of the cylindrical hole (66), the dameter of this hole (66) corresponding sensiblemenet an Mmueter dneo substantially cylindrical part (54) of the axis of articulation (50) housed in this hole (66).   1.0 4 A Até of construction according to the r-ed aon 3 characterized in that the las Zu of the opening ff 8) is smaller than the diameter in cylindrical hole (66), and   in that the share: e cy indrique (5 e) deo ll'se = erticula-   yours (50) presents to the moions a flat murfaco (56) allowing the cylindrical part do pzossr to tra-eero netr   (68) only in at least one predefined m-Z Air G position   gas spring (22) finished with respect to 'Vlèm L & ent of respective construction (: 10) around l- le of i O U.-Tnit & of construction according to claim 4, characterized in that the sr 2? aco plate (56) Got P = llle to the cylinder axis (24>.   6 elon j construction unit Revedication 4 characterized in that Itaze d'riulto 5 G) cor ,, takes two Parts deo 2 tr 6 emit 6 cylindrical (54) able to i 3 be housed in two & isen * o respective (66 , 68) of the axis ent lodge (64) and a Medieme part (52), Mb IZ 60 to the rod of piston (28).   7 Construction unit according to rewendication 6, characterized in that the piston tigoedo (28) has an outer part 6 mite ext 6 riînm 6 reQe ans a socket (-58) provided in the section m 5 diane (32) -   8 Construction unit according to claim 7, 'character 6 ris 6 e in that a clamping ring (6 o) is provided in a circumferential groove 6 of the piston rod (28) at its outer end , this ring bearing against a stop face of the hinge pin   (50) at the socket (58). -32025   9 construction unit according to claim 3, characterized in that the shaft housing (278) is fixed to the gas spring outside the cavity, that is to say to the cylinder or to the piston rod (228), and in that the hinge pin (274) is fixed to the respective construction element. Construction unit according to claim 9, character 6 ris 6 e in that the opening (284) has a width corresponding substantially to the diameter of the cylindrical hole   (222), and in that fixing means (286) are pre-   seen to block this axis (274) engaged 6 in its housing (278).   11 Construction unit according to claim 10, characterized 6 e in that the articulation axis (274) has two extensions (274 a) in the two axial directions beyond the axis housing (278), in that that the fixing means (286) comprise two pairs of fork arms (290 a, 290 b), each of these pairs of arms engaging with   the respective extension of this axis (274) adjacent to the housing   axis (278), these pairs of fork arms (290 a, 290 b) being connected to each other by connection means (288)   and these connection means 6 both provided with fixing means   tion to link these fixing means (286) to the housing axis (278).   12 Construction unit according to claim 11, caract 6 ris 6 e in that connection means (288) are   engaged 6 S by engagement on the axle housing (278).   13 Construction unit according to claim 11, character 6 ris 6 e in that the arms (290 a, 290 b) are provided with notches (290 c, 290 d) profiled to engage with the   extensions (274 a) of the axis (274).   14 Construction unit according to claim 1, characterized 6 e in that the articulation axis (150) extends in its axial direction between the legs (164 a) and is provided with axial holes (172) at its two extra 6 axial mites, and in that pivots (170) are mounted 6 S in the legs   (164 a) and engage in the axial holes (172).