EP3928660A1 - Dispositif d'auto-traction pour une pièce de meuble télescopique - Google Patents

Dispositif d'auto-traction pour une pièce de meuble télescopique Download PDF

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Publication number
EP3928660A1
EP3928660A1 EP21172370.5A EP21172370A EP3928660A1 EP 3928660 A1 EP3928660 A1 EP 3928660A1 EP 21172370 A EP21172370 A EP 21172370A EP 3928660 A1 EP3928660 A1 EP 3928660A1
Authority
EP
European Patent Office
Prior art keywords
carriage
pull
arm
base body
self
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21172370.5A
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German (de)
English (en)
Inventor
Wolfgang Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fulterer AG and Co KG
Original Assignee
Fulterer AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fulterer AG and Co KG filed Critical Fulterer AG and Co KG
Publication of EP3928660A1 publication Critical patent/EP3928660A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
    • A47B88/40—Sliding drawers; Slides or guides therefor
    • A47B88/453—Actuated drawers
    • A47B88/46—Actuated drawers operated by mechanically-stored energy, e.g. by springs
    • A47B88/467—Actuated drawers operated by mechanically-stored energy, e.g. by springs self-closing

Definitions

  • the invention relates to a self-retracting device for a furniture part that can be pulled out of a furniture body in a pull-out direction and pushed against the pull-out direction into the furniture body by means of a pull-out guide, comprising a base body, a slide that moves on or in the base body via a driving path from a basic position to a waiting position is displaceably mounted, a retraction spring which acts on the carriage in the basic position and which engages at a first end at a base body point of application on the base body and of which the second end is in operative connection with the carriage, the carriage being movable in the pull-out direction by coupling with a Driving device is displaceable against the force exerted by the draw-in spring over the driving path from the basic position into the waiting position in which the driving device can be decoupled from the slide and in which the slide is held against the force of the draw-in spring .
  • Self-retracting devices of this type are known, for example from WO 2008/119091 A1 . Usually these are integrated in pull-out guides.
  • a disadvantage of such self-retracting devices is that the extension of the retraction spring changes over the retraction path, with the result that the force acting at the end of the retraction path when the carriage is in its home position is significantly lower than that in the Waiting of the carriage acting on this force, in which the driver device couples to the carriage or uncouples from it. The operator perceives the greatest force that he has to operate as relevant for ease of use. This highest force occurs when the carriage is in the waiting position (i.e. shortly before the coupling device is uncoupled when it is pulled out).
  • the force acting on the slide in its basic position is relevant for the reliable locking of the closed drawer, which in such systems is the lowest force in the displacement path of the slide.
  • the operator is therefore forced to apply a much higher force to open the drawer than is necessary to reliably hold the drawer closed.
  • the draw-in spring engages a lever which is mounted on the base body so that it can pivot about a first pivot axis and is mounted on the slide so that it can pivot about a second pivot axis, the lever being displaceable relative to the first pivot axis or the first pivot axis being displaceable relative to the base body.
  • the point of application of the draw-in spring on this lever is in particular in the area between the first and the second pivot axis.
  • this can bring about an increase in the spring force in the area of the home position of the slide.
  • a disadvantage of this design is that the space required is relatively large in relation to the height of the rails of the pull-out guide. As a result, the Body rail guided rails of the pull-out guide have to be made shorter, whereby the permissible load is reduced due to the unfavorable position of the rollers.
  • a closing device emerges in which the driver device does not interact with a displaceable slide but with a closing lever which can be pivoted about a pivot axis and which is acted upon by the draw-in spring.
  • the draw-in spring does not act directly on the closing lever but on a further pivotably mounted lever, the connection between the closing lever and the further lever being made via a connecting arm pivotably attached to the closing lever and the further lever. In this way, the force curve can be adjusted.
  • the required installation space and the relatively short pull-in distance are disadvantageous here.
  • the object of the invention is to provide an advantageous self-retracting device of the type mentioned at the outset, in which an advantageous force profile of the retraction force acting on the driver device can be achieved with a relatively large retraction distance and a relatively small installation space required. According to the invention, this is achieved by a self-retracting device with the features of claim 1.
  • the retraction spring is connected to the slide via an arm which is pivotably mounted on the slide about a pivot axis and on which the retraction spring engages with its second end at a distance from the pivot axis at an arm engagement point.
  • the arm is with respect to its pivot position about the pivot axis guided by the base body when the slide is moved from the basic position to the waiting position via the entrainment path.
  • the pivot position of the arm about the pivot axis changes.
  • the force exerted by the spring on the carriage over the course of the entrainment path can be influenced.
  • the arm can be pivoted when moving the carriage starting from the basic position over an initial section of the entrainment path in the direction of rotation in which the distance between the point of application of the arm is Draw-in spring from the base body point of application of the draw-in spring enlarged.
  • the pull-out guide is pulled out, starting from the fully collapsed state, the force exerted by the pull-in spring on the slide and thus on the pull-out furniture part at the start of pulling out is increased.
  • this increased force also acts over the last section of the pull-in when the pull-out furniture part is pulled in by the self-pulling device.
  • the arm is pivoted in the direction of rotation in which the distance from the arm point of application of the draw-in spring is reduced from the base body point of application of the draw-in spring.
  • the force required to pull out the pull-out furniture part is thereby reduced in the area over which the slide is displaced over the end section of the entrainment path.
  • the guidance of the pivoting position of the arm about the pivot axis caused by the base body can advantageously be effected by a link guide when the slide is displaced via the entrainment path, the base body having a link in which a guide pin of the arm engages.
  • the self-retracting device advantageously has, in a known manner, a damper unit for damping the displacement of the carriage from the waiting position into the basic position.
  • the slide has a tilting part which can be pivoted between an engagement position and a release position about a tilting axis at right angles to the pull-out direction.
  • the tilting part the pivoting position of which with respect to the tilting axis is guided by the base body via the driving path when the slide is moved, is in the basic position of the slide in the engagement position in which the driver device is coupled to the tilting part.
  • the tilting part In the waiting position of the carriage, the tilting part is tilted into the release position, in which a decoupling of the driver device from the tilting part is made possible.
  • the tilting part is advantageously pivoted about the tilting axis over more than half of the driving path of the slide.
  • a (more or less rapid) pivoting of the tilting part about the tilting axis can in particular take place at least essentially over the entire extent of the entrainment path.
  • the pivoting position of the tilting part is preferably guided about the tilting axis by the base part in such a way that with a uniform movement of the carriage over the entrainment path, a non-uniform rotation about the tilting axis occurs, that is, faster over part of the entrainment path than over another part of the entrainment path.
  • the effect of the damper can be influenced differently in different phases of the retraction.
  • the effect of the damper unit can be reduced in order to support a complete drawing-in of the pull-out furniture part.
  • the effect of the damper unit can be reduced in an initial section of the retraction, as a result of which the pull-out furniture part can be braked more gently by the damper when the pull-out furniture part is pushed in with momentum.
  • a reduction of the movement of the movable part of the damper unit can also be brought about by rotating the tilting part about the tilting axis.
  • the damping unit can be designed with a correspondingly increased damping effect, for example through a higher viscosity of the oil used.
  • the self-retracting device according to the invention is advantageously integrated into a pull-out guide, which has a body rail that can be attached to a furniture body, and a pull-out rail that can be attached to an extendable furniture part, the base body of the self-pulling device on one of the rails of the pull-out guide and the driver device is arranged on another of the rails of the pull-out guide.
  • FIG. 1 to 27 An embodiment of the invention is shown in Figs. 1 to 27 shown.
  • the self-retracting device is integrated in a pull-out guide, which is shown in the Embodiment comprises a body rail 1, a middle rail 2 and a pull-out rail 3.
  • the pull-out guide is designed here in the manner of a differential pull-out guide, in which the center rail 2 covers half the distance of the pull-out rail 3 when it is pulled out and pushed in. As shown, all rollers can be arranged on the center rail 2.
  • the pull-out guide can be designed in a conventional manner and the arrangement of the rollers and their mode of operation need not be explained in more detail here.
  • a self-retracting device can also be integrated in other types of pull-out guides, for example also in a pull-out guide which has only one body rail and one pull-out rail.
  • the pull-out rail 3 is pulled out from the completely pushed-in state in a pull-out direction 4, while the pull-out rail 3 is pushed in counter to the pull-out direction 4.
  • the self-retracting device has a base body 5, which forms a housing in which a slide 6 parallel to the pull-out direction 4 between a basic position ( Fig. 1, 4 , 6th , 8, 9 , 12, 13 , 16, 17 , 19, 25 ) and a waiting position ( Figures 2, 3, 5 , 10, 11 , 14, 15 , 18th , 24 ) is slidably mounted.
  • the shift from the basic position into the waiting position via a driving path takes place by coupling with a driving device which moves with the pull-out furniture part 51 16. In the exemplary embodiment, this is arranged at the rear end of the pull-out rail 3, as is preferred.
  • the tilting part 9 assumes an engagement position with respect to its pivoting about the tilting axis 10, in which the tilting part 9 is coupled to the driver device 16; can uncouple.
  • the tilting axis 10 can be formed, for example, by means of axle journals 11 of the carriage 6, which engage in axis recesses of the tilting part 9.
  • the tilt axis 10 is at right angles to the pull-out direction 4 and is preferably horizontal.
  • the base body point of application 14 can be formed, for example, by a pin in which a hook-shaped end of the draw-in spring is suspended.
  • the second end of the draw-in spring 13 is in operative connection with the slide.
  • the second end of the draw-in spring is not attached directly to the slide, but is connected to the slide 6 via an arm 7, which is mounted on the slide 6 so as to be pivotable about a pivot axis 8.
  • the pivot axis 8 is at right angles to the pull-out direction 4 and is preferably horizontal.
  • the second end of the draw-in spring 13 engages at a distance from the pivot axis 8 at an arm engagement point 15 of the arm 7, for example in that a hook-shaped end of the draw-in spring 13 engages around a web which connects two parts of the arm 7 to one another.
  • a damper unit 12 serves to dampen the displacement of the slide 6 from the waiting position into the basic position.
  • the cylinder is immovably connected to the base body 5.
  • the piston rod is connected to the slide 6. Only the movement of the slide 6 opposite to the pull-out direction is damped by the piston-cylinder unit, while the movement of the slide 6 in the opposite direction is undamped.
  • Such hydraulically or pneumatically acting dampers which have a freewheel in one direction of movement are known.
  • a kinematically reversed arrangement of the piston-cylinder unit is also conceivable and possible, that is to say that the piston rod is immovable with respect to the base body 5 and the cylinder is displaceable and is connected to the slide 6.
  • the driver device 16 cooperating with the tilting part 9, which is formed in the region of the rear end of the pull-out rail 3, has in the exemplary embodiment a slot which is arranged in a web 17 which connects a vertical web 18 of the pull-out rail with a horizontal web 19 of the pull-out rail.
  • the horizontal web 19 forms a track for rollers of the center rail.
  • the web 17 connecting the vertical web 18 to the horizontal web 19 is designed to be inclined in the area in front of the slot 16a. In the area behind the slot 16a, this web 17 has a raised web section.
  • the front edge 16b of the slot 16a is therefore lower (closer to the tilt axis 10) than the rear edge 16c.
  • the tilting part 9 is guided by the base body 5 about the tilting axis 10 with respect to its pivoting position.
  • the base body has a first tilting part guide slot 20 and a second tilting part guide slot 21, into which a first and second guide pin 9b, 9c of the tilting part 9 engage.
  • first and second tilting part guide slots 20, 21, into which a guide pin 9b, 9c engages the force acting on the tilting axis 10 can be reduced or even essentially completely switched off. It would therefore also be conceivable and possible for the axle journals 11, which engage in the axle recesses of the tilting part 9, to be omitted, so that the pivoting takes place about an imaginary tilting axis.
  • the tilting part 9 and thus the slide 6 are thus initially entrained by the engagement of the projection 9a of the tilting part 9 in the slot 16a of the driver device 16.
  • the carriage 6 is taken along via the Driving distance until the carriage 6 reaches the waiting position.
  • the tilting part 9 pivots from the engagement position into the release position.
  • the projection 9a of the tilting part 9 can move out of the slot 16a.
  • the slide 6 is blocked by the interaction of the guide pins 9b, 9c with the end sections of the tilting part guide slots 20, 21 against a retraction caused by the action of the pull-in spring 13 against the pull-out direction 4.
  • the tilting part 9 could thus have a different retaining surface which, in the waiting position of the carriage 6 and the tilting position of the tilting part 9, interacts with a contact surface of the base body 5. It would also be conceivable and possible, for example, to hold the carriage 6 in the waiting position by means of magnetic force.
  • the pull-out rail 3 When the pull-out rail 3 is pushed in starting from the fully extended state, the pull-out rail 3 is coupled to the tilting part 9 in an intermediate position
  • the tilting part 9 is pivoted from the release position in the direction of the engagement position.
  • the guide pins 9b, 9c of the tilting part 9 thereby get out of the end sections of the tilting part guide slots 20, 21, whereby the holder of the slide 6 is canceled against retraction by the retraction spring 13 in the direction of its basic position.
  • the slide 6 is then moved against the damping force caused by the damper unit 12 by the draw-in spring 13 over the draw-in distance s (see FIG Fig. 24 ) withdrawn to its basic position.
  • the position of the point of application of the driver device 16 on the tilting part 9 with respect to the slide 6 can be shifted in relation to the pull-out direction 4.
  • Such a displacement of the point of application in the direction of the rear end of the slide 6 can ensure that the driver device 16 covers a greater distance than the slide 6.
  • the movement of the driver device 16 or the pull-out furniture part 51 can thus be reduced to the movement of the slide 6.
  • the distance between the tilting axis 10 and the point of application of the driver device 16 on the tilting part 9 is made correspondingly large. This distance is favorably at least 15%, preferably at least 20%, of the extension distance s.
  • the rotation of the tilting part 9 takes place in an initial section of the entrainment path of the carriage 6 following the initial position of the carriage, preferably faster than in an adjoining central section of the The entrainment path of the slide 6. It can be achieved that the effect of the damper unit 12 is reduced in this last section of the retraction. The pull-in of the pull-out furniture part 51 by the pull-in spring 13 is thereby facilitated in this pull-in section.
  • the rotation of the tilting part 9 about the tilting axis 10 takes place preferably faster than in a preceding central section of the entrainment path of the carriage.
  • the draw-in spring 13 is connected to the slide 6 via an arm 7.
  • the slide 6 has axle journals 22 which engage in axle recesses in the arm 7.
  • Other types of pivotable mounting of the arm 7 on the slide 6 are conceivable and possible.
  • the base body 5 has an arm guide slot 23 for this purpose, into which a guide pin 24 of the arm 7 engages.
  • the arm 7 By guiding the pivoting position of the arm 7 through the base body 5 when the slide 6 is moved, the arm 7 is pivoted over an end section of the entrainment path before the slide 6 reaches the waiting position in the direction of rotation in which the distance between the arm engagement point 15 of the draw-in spring is 13 reduced from the base body point of application 14 of the draw-in spring 13.
  • the expansion of the draw-in spring 13 is less than the distance over which the carriage 6 is displaced. This means that the force which the user has to apply to pull out the pull-out rail 3 is reduced over this end section of the entrainment path.
  • this effect is still due to the greater step-down of the movement of the carriage 6 in the end section of the entrainment path compared to the movement of the entrainment device 16, which is due to the faster Rotation of the tilting part 9 about the tilting axis 10 is effected, reinforced.
  • the distance between the point of application of the arm 15 of the draw-in spring 13 and the pivot axis 8 is preferably at least 10% of the draw-in distance s.
  • the tilting part guide slot 20 merges into an area which, compared to ⁇ 1, encloses an angle a2 with the horizontal which is greater than that of ⁇ 1. If the position accordingly Fig. 21 is reached, the pivoting of the tilting part 9 is gradually reduced again and the pivoting of the arm 7 is also reduced further. For this purpose, the arm guide slot 23 gradually merges into an area in which the angle ⁇ 2 relative to the horizontal is smaller than ⁇ 1.
  • connection of the pivot axis 8 to the guide pin 24 and the connection of the pivot axis 8 to the arm engagement point 15 of the retraction spring 13 are shown by dashed lines.
  • the angle between these both dashed lines is preferably in the range from 45 ° to 135 °, particularly preferably in the range from 60 ° to 120 °.
  • a base body on which or in which a slide is slidably mounted can also have a different shape.
  • the slide 6 it would also be conceivable and possible for the slide 6 to be designed without a separate tilting part 9. The slide 6 as a whole could then be tilted during its displacement from the basic position into the waiting position, i.e. the displacement from the basic position into the waiting position would take place along a curved path (in particular only at the end).
  • the driver device 16 could also be designed in a different way, for example the tilting part 9 could have a recess into which a pin or projection that forms the driver device engages. In particular, this projection could be arranged on the pull-out rail 3.
  • the tilting part 9 could have a recess into which a pin or projection that forms the driver device engages. In particular, this projection could be arranged on the pull-out rail 3.
  • the reference numbers 1 Cabinet rail 21 second tilting part guide link 2 Middle rail 3 Pull-out rail 22nd Stub axle 4th Pull-out direction 23 Arm guide backdrop 5 Base body 24 Guide pin 6th sleds 50 Furniture body 7th poor 51 pull-out furniture part 8th Swivel axis 9 Tilting part 9a head Start 9b Guide pin 9c Guide pin 9d Contact surface 10 Tilt axis 11th Stub axle 12th Damper unit 13th Draw-in spring 14th Base body point of attack 15th Arm attack point 16 Carrier device 16a sleds 16b leading edge 16c rear edge 17th web 18th Vertical

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drawers Of Furniture (AREA)
EP21172370.5A 2020-06-25 2021-05-06 Dispositif d'auto-traction pour une pièce de meuble télescopique Pending EP3928660A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA144/2020A AT523706B1 (de) 2020-06-25 2020-06-25 Selbsteinziehvorrichtung für ein ausziehbares Möbelteil

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EP3928660A1 true EP3928660A1 (fr) 2021-12-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21172370.5A Pending EP3928660A1 (fr) 2020-06-25 2021-05-06 Dispositif d'auto-traction pour une pièce de meuble télescopique

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EP (1) EP3928660A1 (fr)
AT (1) AT523706B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119091A1 (fr) 2007-04-02 2008-10-09 Fulterer Gesellschaft M.B.H. Guide de déploiement différentiel à galets
DE102011051907A1 (de) 2011-07-18 2013-01-24 Horst Lautenschläger Einzugsvorrichtung für bewegbare Möbelteile
WO2016065378A1 (fr) * 2014-10-30 2016-05-06 Julius Blum Gmbh Dispositif d'insertion d'éléments de meuble
AT521511B1 (de) * 2018-12-21 2020-02-15 Fulterer Ag & Co Kg Selbsteinziehvorrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT407602B (de) * 1994-08-31 2001-05-25 Alfit Ag Einzugsvorrichtung für schubladen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119091A1 (fr) 2007-04-02 2008-10-09 Fulterer Gesellschaft M.B.H. Guide de déploiement différentiel à galets
DE102011051907A1 (de) 2011-07-18 2013-01-24 Horst Lautenschläger Einzugsvorrichtung für bewegbare Möbelteile
WO2016065378A1 (fr) * 2014-10-30 2016-05-06 Julius Blum Gmbh Dispositif d'insertion d'éléments de meuble
AT521511B1 (de) * 2018-12-21 2020-02-15 Fulterer Ag & Co Kg Selbsteinziehvorrichtung

Also Published As

Publication number Publication date
AT523706B1 (de) 2021-11-15
AT523706A4 (de) 2021-11-15

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