EP2842459A1 - Furniture item with traction device - Google Patents

Furniture item with traction device Download PDF

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Publication number
EP2842459A1
EP2842459A1 EP14180860.0A EP14180860A EP2842459A1 EP 2842459 A1 EP2842459 A1 EP 2842459A1 EP 14180860 A EP14180860 A EP 14180860A EP 2842459 A1 EP2842459 A1 EP 2842459A1
Authority
EP
European Patent Office
Prior art keywords
traction
frames
attachment
cross
traction device
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.)
Withdrawn
Application number
EP14180860.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Agostino Pettarini
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.)
Viteria Pettarini Srl
Original Assignee
Viteria Pettarini Srl
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 Viteria Pettarini Srl filed Critical Viteria Pettarini Srl
Publication of EP2842459A1 publication Critical patent/EP2842459A1/en
Withdrawn legal-status Critical Current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
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/02—Dismountable chairs
    • A47C4/022—Dismountable chairs connected by bars or wires
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/02—Dismountable chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/02—Dismountable chairs
    • A47C4/024—Dismountable chairs having integral back-rest and rear leg

Definitions

  • the present invention concerns a furnishing element of the type provided with legs that support a support or resting plane, such as for example, but not only, a seating element, in particular a chair, or a table and suchlike.
  • the furnishing element according to the present invention is the type that can be assembled and disassembled, and does not need, for its assembly, normal hardware attachment elements such as screws, bolts and suchlike.
  • Furnishing elements that have a wood frame have their components assembled by means of reciprocal geometric coupling and are attached to each other by means of screws, bolts, or other hardware attachment elements.
  • attachment elements may loosen over time, with the repeated use of the furnishing element, because of the grip that the hardware has on the wood and the possibility of partial yielding because of the stresses deriving from use.
  • One disadvantage of known attachment elements is that it takes a long time to restore the initial conditions of optimal traction and consequent stability of the furnishing element.
  • Furnishing elements are known that, although they do not provide to use hardware attachments, require to use at least two telescopic tie-rods put under traction by levers to keep together under traction the various components. These solutions, however, have the disadvantage of needing a high number of auxiliary clamping elements.
  • Furnishing elements are also known in which a traction device includes two attachment elements acting on opposite frames of the furnishing element and put under traction by means of a common central drive element.
  • One purpose of the present invention is to obviate said disadvantages, obtaining a furnishing element that is easy and rapid to assemble, that does not need hardware attachment elements, and that uses a limited number of components, at the same time guaranteeing solidity and overall resistance.
  • Another purpose of the present invention is to obtain a furnishing element that allows to minimize the operations needed to produce it and that therefore allows a significant reduction in production costs.
  • Another purpose is to obtain a traction device for a furnishing element that allows an easy, effortless and secure assembly thereof, and confers upon it robustness and safety, and is easy and quick to restore if, over time and with use, there is slackening and partial yielding.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a furnishing element comprises at least two opposite support frames and a traction device configured to be interposed and connected between the at least two frames.
  • the traction device comprises at least an intermediate drive element, to define a traction condition and obtain a reciprocal drawing together of the at least two frames.
  • the traction device also comprises a plurality of attachment segments provided in an opposite position on one side and on the other with respect to the drive element.
  • the at least two frames comprise a plurality of housing seatings configured to each receive, in an attached condition, a respective attachment segment.
  • Each of the housing seatings is internally delimited at least by a holding surface configured to be at least partly interposed, in the attached condition, between the attachment segment and the drive element, and to be in abutment, in the traction condition, with the respective attachment segment inserted in the respective housing seating.
  • the advantage is obtained of being able to achieve the firm and secure assembly of the furnishing element and to maintain a firm and secure conformation only by inserting the attachment segments into the respective housing seatings and by driving the drive element of the traction device.
  • driving the latter may provide only a rotation with respect to its longitudinal axis and can be performed both to determine the traction condition at the moment of assembly, and also to restore said condition in the event that the traction were to slacken with use.
  • connection between the traction device and the support frames is achieved by means of attachment, is that it is possible to simplify the operations of making the housing seatings and the traction device, thus allowing another reduction in the production times and costs of the furnishing element, and also avoids the need to use attachment means such as screws, bolts, bushings or other hardware material.
  • the traction device is configured to exert, in the traction condition and by driving the drive element, a traction force provided along a first lying plane of the traction device and applied transversely to a second lying plane of each of the frames.
  • the housing seatings can be made in a single milling operation, which is indicative of the simplification that can advantageously be obtained thanks to the present invention.
  • the housing seatings can be made in connection cross-pieces between legs of the frames.
  • the housing seatings can be open toward an internal zone comprised between the two frames and/or a zone comprised between two legs of each frame.
  • the housing seatings can be defined by two portions having different penetration heights inside the respective cross-pieces in which they are made.
  • the housing seatings include a first portion, more external, and a second portion, move internal in the thickness of the cross-piece, wherein the second portion has a greater penetration height than that of the first portion.
  • the presence of the two portions allows both to facilitate the insertion of the attachment segments into the housing seatings, and also, thanks to the greater depth of the second portion, to achieve a solid anchorage and holding of the attachment segments even in the traction condition.
  • a chair 10 can comprise two support frames, for example a rear frame 11, normally having an essentially vertical development, and a front frame 12, opposite the rear frame 11 and also with an essentially vertical development.
  • the rear frame 11 can be provided with a pre-assembled backrest 13.
  • each frame, both the rear one 11 and the front one 12, can include two support legs 14, connected to each other by one or more horizontal cross-pieces, respectively rear cross-piece 15a and front cross-piece 15b.
  • the two frames 11 and 12 can be connected to each other by lateral cross-pieces 16 which, in possible implementations, can be assembled perpendicular with respect to the frames 11 and 12.
  • a traction device such as a tie-rod 19, can be provided interposed and connected between the frames 11 and 12, in cooperation with the lateral cross-pieces 16 and the rear 15a and/or front cross-pieces 15b, to confer solidity and durability to the assembly of the chair 10, as will become clear hereafter in the present description.
  • the tie-rod 19 is configured to exert a linear traction force F on the two frames 11 and 12: the traction force F lies on a first lying plane of the traction device 19 and is applied transversely to a second lying plane of each of the two frames 11 and 12.
  • connection through mechanical interference between the tie-rod 19 and the rear 15a and/or front cross-pieces 15b can allow to reduce the quantity and complexity of the operations necessary to produce the chair 10, consequently reducing the production costs, and making assembly simpler and faster.
  • a single rear horizontal cross-piece 15a is provided, which connects the two legs 14 of the rear frame 11 to each other, and a single horizontal front cross-piece 15b, which connects the two legs 14 of the front frame 12 to each other.
  • each pair of legs 14 an upper horizontal cross-piece and a lower horizontal cross-piece may be provided, overlapping each other and distanced along the vertical development of the legs 14.
  • Fig. 1 is used to describe forms of embodiment in which there is a single pair of lateral cross-pieces 16, positioned substantially on opposite sides with respect to a median axis of the chair 10, in correspondence with the disposition of the legs 14.
  • the chair 10 can include, conventionally, connection members 17 between the lateral cross-pieces 16 and the frames 11 and 12.
  • connection members 17 can include pins 17a, inserted into suitable blind holes 17b that function as seatings for the pins 17a and are made in each of the ends of the lateral cross-pieces 16 and in the zone of each frame 11, 12 used to connect the lateral cross-pieces 16 themselves.
  • tenons can be used, made in a piece at the ends of the cross-pieces 16, and instead of the blind holes 17b corresponding mortises can be used, made in the frames 11, 12, which function as seatings for said tenons.
  • the two frames 11 and 12 and the corresponding lateral cross-pieces 16 are configured to define, in the assembled condition, a support structure on which a support plane can be located and possibly attached, for example by jointing or gluing, which in this specific case of the chair 10 is defined by a seat part 18.
  • the chair 10 can also include a single traction device or tie-rod 19, which can be disposed for example lying on a plane substantially orthogonal to those defined by the rear frame 11 and the front frame 12, for example on a horizontal plane.
  • a single traction device or tie-rod 19 which can be disposed for example lying on a plane substantially orthogonal to those defined by the rear frame 11 and the front frame 12, for example on a horizontal plane.
  • tie-rod 19 can be positioned at the center with respect to the frames 11 and 12 and the horizontal cross-pieces 16.
  • the tie-rod 19 can be located under the seat part 18, so that it is hidden from sight during the normal use of the chair 10.
  • the tie-rod 19 is put in cooperation with the two frames 11 and 12, to determine, when driven, a desired traction to bring the two frames 11 and 12 reciprocally closer. This traction can be exerted by the tie-rod 19 in a direction lying on its lying plane.
  • the tie-rod 19 can include two traction bars, for example a rear traction bar 20 and a front traction bar 21, both connected to a handle 22, which functions as a drive element on the tie-rod 19.
  • the handle 22 is driven to determine the application of the traction force F on the frames 11 and 12, and hence to put the tie-rod 19 in a condition of traction.
  • the traction bars 20, 21 can be disposed reciprocally coaxial and opposite with respect to the handle 22.
  • the traction bars 20, 21 can be equipped with a threaded end 20a, 21a, and a hooked end 20b, 21b, or an eyelet, opposite the respective threaded end 20a, 21a.
  • the handle 22 can be disposed in a substantially central position between the two traction bars 20, 21 and can be hollow with an internal mother screw, to at least partly house the threaded ends 20a, 21a.
  • the tie-rod 19 can also include one or more attachment elements to the frames 11 and 12, for example a rear attachment element 23 and a front attachment element 24 which respectively allow the connection of the tie-rod 19 with the front frame 11 and the rear frame 12.
  • the rear attachment element 23 can include two arms 25 each having an end converging toward a common top 27, to define a convex geometry, substantially V-shaped, of the rear attachment element 23.
  • the front attachment element 24 can have a V-shape defined by two arms 26 converging toward a common top 28.
  • each arm 25, 26 can have a curved end 29.
  • the curved end 29 can include an attachment segment 30 inclined with respect to the part of the respective arm 25, 26 comprised between the top 27, 28 and the curved end 29.
  • the attachment segment 30 can have a substantially rectilinear development along a longitudinal axis lying on the same plane or on a parallel plane with respect to the lying plane of the tie-rod 19, or, in alternative implementations, the longitudinal axis can lie on a plane inclined with respect to the lying plane of the tie-rod 19.
  • Fig. 1 is used to describe forms of embodiment in which the attachment segments 30 of the arms 25, 26 develop along longitudinal axes parallel to each other and to the lying planes of the frames 11 and 12, and essentially orthogonal to the lying plane of the tie-rod 19 and substantially parallel.
  • the longitudinal axes of the attachment segments 30 are identified in fig. 1 by the alphanumerical references X1, X2, X3, X4.
  • Housing seatings can be made in the rear 15a and front cross-pieces 15b, respectively front housing seatings 31a and rear housing seatings 31b, configured each to house an attachment segment 30 of an arm 25 or an arm 26.
  • the positioning of the attachment segments 30 in the respective housing seatings 31 a, 31 b determines an attached condition of the tie-rod 19.
  • Figs. 1 and 2 can be used to describe forms of embodiment in which each cross-piece 15a, 15b is provided with two housing seatings 31a, 31b respectively.
  • fig. 2 is used to describe by way of example both said attached condition (on the left in fig. 2 ) in which the attachment segment 30 is inserted inside the housing seating 31a, 31b, and also a non-attached condition (on the right in fig. 2 ), in which the housing seating 31a, 31b is free.
  • Each housing seating 31a, 31b can be made in the corresponding rear cross-piece 15a or front cross-piece 15b, for example by a single milling operation.
  • the housing seatings 31a, 31b can be made in the lower part of the cross-pieces 15a, 15b, and can be open on two sides, in particular downward and toward a zone of the chair 10 comprised between the rear frame 11 and the front frame 12 and possibly subtended by the seat part 18.
  • each of the housing seatings 31a, 31b can extend, in a direction parallel to the longitudinal axis X1-X4 of the corresponding attachment segment 30 (vertical in the case shown by way of example with reference to fig. 1 ) for a height about equal to the length of said attachment segment 30.
  • each of the housing seatings 31a, 31b can have a depth inside the respective cross-piece 15a, 15b about equal to the length of the curved end 29 of the arm 25, 26 whose attachment segment 30 it houses.
  • Each housing seating 31a, 31b can also have a transverse amplitude which, for at least part of said depth, is at least equal to the thickness of the attachment segment 30 it has to house.
  • the transverse amplitude is constant along the whole depth of the housing seating 31a, 31b.
  • the transverse amplitude is variable along the depth of the housing seating 31a, 31b.
  • each housing seating 31a, 31b can be less than the thickness of the attachment segment 30, and for the remaining internal section it can be more than said thickness.
  • the housing seatings 31a, 31b can have a rectilinear development and can be inclined with respect to a direction perpendicular to the cross-piece 15a, 15b and parallel to the direction of application of the traction force F, that is, rotated on a plane substantially parallel to the lying plane of the tie-rod 19.
  • This inclination or rotation can be defined by an angle ⁇ comprised between 30° and 180°.
  • the housing seatings 31a, 31 b can be reciprocally convergent toward the center of the chair 10.
  • the housing seatings 31a, 31b can be delimited by a perimeter wall having at least a holding surface 32a, 32b interposed at least partly between the attachment segment 30 and the handle 22, and against which, during use, that is, in the traction condition, the attachment segment 30 abuts due to the effect of the traction performed by the tie-rod 19.
  • Each holding surface 32a, 32b can be planar, or curved, for example cylindrical, and can develop in a direction parallel to the longitudinal axis X1-X4 of the attachment segment 30 housed in the corresponding housing seating 31 a, 31b.
  • each holding surface 32a, 32b can be inclined, or substantially orthogonal, to the direction of application of the traction force F applied on the cross-pieces 15a, 15b by the tie-rod 19 and hence can apply on the attachment segment 30 a holding force with an inclined or parallel direction and the opposite sense with respect to the traction force F.
  • each holding surface 32a, 32b can hold the attachment segment 30 inside the housing seating 31 a, 31b.
  • each arm 25, 26 can diverge from the corresponding top 27, 28 of the respective attachment element 23, 24, with an inclination that can be equal to the angle ⁇ as above.
  • each curved end 29 of the arms 25, 26 can include a connection portion 33, which connects the attachment segment 30 to the remaining part of the respective arm 25, 26 that extends to the top 27, 28 of the corresponding attachment element 23, 24.
  • connection portion 33 of the curved end 29 can be coplanar with respect to the part of the arm 25, 26 that extends as far as the respective top 27, 28 and inclined with respect to the latter.
  • the arms 25, 26 can diverge from the respective top 27, 28 by a bigger angle than that of the connection portion 33. Consequently, the connection portion 33 can define a partial closure of the V-shape of the respective attachment element 23, 24 toward the central zone of the corresponding cross-piece 15a, 15b.
  • the inclination of the connection portion 33 with respect to a direction orthogonal to the cross-pieces 15a, 15b can be equal to the angle ⁇ described above.
  • Fig. 3 is used to describe forms of embodiment, which can be combined with all the forms of embodiment described here, in which each housing seating 31 a, 31b is formed by a first portion, or external portion 131a, 131b, having a depth, measured in a direction orthogonal to the cross-piece 15a, 15b and parallel to the direction of application of the force F, at least greater than half the thickness of the cross-piece 15a, 15b, and by a second portion or internal portion, 231a, 231b, having, in the same direction, a depth at least equal to the thickness of an attachment segment 30.
  • the external portion 131 a, 131b can have a first penetration height H1 inside the cross-piece 15a, 15b, measured with respect to the external surface 115a, 115b of the cross-piece 15a, 15b in a direction orthogonal to the direction of application of the force F and essentially parallel to the longitudinal axis X1-X4 of the corresponding attachment segment 30, while the internal portion 231a, 231b can have a second penetration height H2 inside the cross-piece 15a, 15b greater than said first height H1.
  • the holding surface 32a, 32b of the housing seating 31a, 31b is part of the perimeter wall that delimits the corresponding internal portion 231 a, 231 b described above, and at least partly surrounds the attachment segment 30, exerting thereon a holding force with a parallel direction and opposite sense with respect to the traction force F exerted by the tie-rod 19.
  • the holding surfaces 32a, 32b allow to keep the attachment segments 30 of the attachment elements 23, 24 in the housing seatings 31a, 31b, even and especially when the tie-rod 19 is subjected to traction.
  • the working to be carried out on the components of the chair 10 comprises only the milling operations to obtain the housing seatings 31a, 31b.
  • the chair 10 made as described above also has the advantage, compared with the state of the art, that it can be assembled easily and effortlessly by the final user, without the producer having to carry out any pre-assembly operations which would affect the cost of the chair.
  • the assembly of the chair 10 includes only operations that can be carried out by the final user.
  • attachment segments 30 can be inserted into the housing seatings, rear 31a and front 31b, and subsequently the handle 22 can be rotated to drive the tie-rod 19 and apply a traction force to move the rear frame 11 and the front frame 12 reciprocally nearer each other.
  • the housing seatings 31 a, 31 b are distanced from each other along the width of the cross-piece 15a, 15b in which they are made, so that the traction force is distributed uniformly over the whole respective cross-piece 15a, 15b.
  • the cross-pieces 15a, 15b transmit the traction force to the frames 11 and 12 due to the fact that they are attached to them.
  • the handle 22 can rotate around its longitudinal axis, as indicated by the arrow R in fig. 1 . Said rotation can determine the screwing of the two threaded ends 20a and 21 a inside the handle 22.
  • the traction bars 20, 21 are consequently brought near each other and, as a result, this can generate a traction acting on both the attachment elements 23, 24 due to the connection between the tops 27, 28 and the hooked ends 20b, 21b.
  • the handle 22 and the two threaded ends 20a and 21 a thus constitute an effective adjustment device 40 of the traction force.
  • a variant of this geometric disposition provides that the two arms 25 and 26 are substantially T-shaped, so that all in all the attachment elements 23, 24 and the tie-rod 19 are substantially shaped like a double T.
  • the front traction bar 21 or the rear traction bar 20 can be directly connected to the corresponding cross-piece 15b or 15a, for example if the corresponding hooked end 21b or 20b has an attachment segment 30 compatible in shape with insertion into a housing seating 31b or 31a.
  • both the hooked ends 20b and 21b can have an attachment segment 30 to be directly connected to the respective cross-pieces 15a, 15b, without using specific attachment elements 23, 24, but the traction bars 21 and 20 themselves acting as attachment elements.
  • the tie-rod 19 has only one threaded part and the handle 22 has only one mother screw end, while the other end is connected, rotatably or rigidly, to the corresponding non-threaded part of the tie-rod 19, but is not active in traction. In this case there is an asymmetrical traction and only one of the frames 11 and 12 moves with respect to the other which stays still.
  • the handle 22 is externally threaded and the threaded ends 20a and/or 21 a are hollow and threaded internally, functioning as a mother screw.
  • the frames 11 and 12, the cross-pieces 15a and 15b, and the lateral cross-pieces 16 are preferably made of wood
  • the tie-rod 19 is preferably made of metal, but can have plastic or rubber parts.
  • the handle 22, which has an ergonomic shape to facilitate gripping may preferably be made of rubber, but can also be made of rigid plastic with rubber gripping inserts, or again it may be made of metal with a rubber covering.

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  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Radiation-Therapy Devices (AREA)
EP14180860.0A 2013-08-30 2014-08-13 Furniture item with traction device Withdrawn EP2842459A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUD20130032 ITUD20130032U1 (it) 2013-08-30 2013-08-30 Elemento d'arredo

Publications (1)

Publication Number Publication Date
EP2842459A1 true EP2842459A1 (en) 2015-03-04

Family

ID=50678678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14180860.0A Withdrawn EP2842459A1 (en) 2013-08-30 2014-08-13 Furniture item with traction device

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EP (1) EP2842459A1 (it)
IT (1) ITUD20130032U1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10098462B2 (en) * 2015-02-13 2018-10-16 Zheng Yao KD chair and stool construction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US660208A (en) * 1900-02-01 1900-10-23 Byron R Blaisdell Bedstead.
US1089007A (en) * 1912-03-21 1914-03-03 Arthur Ponton Bed-spring tightener.
GB648106A (en) * 1948-11-24 1950-12-28 Greaves & Thomas Ltd Improvements in and relating to chairs
EP0712594A1 (en) * 1994-11-18 1996-05-22 BUIANI LINO & FIGLI Srl System for the assembly and clamping of seats which can be dismantled
EP2005860A1 (en) * 2007-06-21 2008-12-24 Viteria Pettarini S.r.l. Furnishing element

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US660208A (en) * 1900-02-01 1900-10-23 Byron R Blaisdell Bedstead.
US1089007A (en) * 1912-03-21 1914-03-03 Arthur Ponton Bed-spring tightener.
GB648106A (en) * 1948-11-24 1950-12-28 Greaves & Thomas Ltd Improvements in and relating to chairs
EP0712594A1 (en) * 1994-11-18 1996-05-22 BUIANI LINO & FIGLI Srl System for the assembly and clamping of seats which can be dismantled
EP2005860A1 (en) * 2007-06-21 2008-12-24 Viteria Pettarini S.r.l. Furnishing element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10098462B2 (en) * 2015-02-13 2018-10-16 Zheng Yao KD chair and stool construction
US20190008279A1 (en) * 2015-02-13 2019-01-10 Zheng Yao KD Chair and Stool Construction
US10463154B2 (en) * 2015-02-13 2019-11-05 Zheng Yao KD chair and stool construction

Also Published As

Publication number Publication date
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