WO2011052099A1 - ロッキング椅子 - Google Patents
ロッキング椅子 Download PDFInfo
- Publication number
- WO2011052099A1 WO2011052099A1 PCT/JP2009/070128 JP2009070128W WO2011052099A1 WO 2011052099 A1 WO2011052099 A1 WO 2011052099A1 JP 2009070128 W JP2009070128 W JP 2009070128W WO 2011052099 A1 WO2011052099 A1 WO 2011052099A1
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- WO
- WIPO (PCT)
- Prior art keywords
- seat
- backrest
- back cover
- column
- cover
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
- A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/02—Rocking chairs
- A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
- A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/024—Seat parts with double seats
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
Definitions
- the present invention relates to a rocking chair whose backrest tilts backward against spring means (elastic means), and more particularly to a chair whose seat moves forward in conjunction with the back tilt of the backrest.
- Patent Document 1 discloses a chair in which, when a seated person leans on the backrest, the backrest descends while tilting backward and the seat moves forward while tilting backward as a whole.
- the advantage of the forward movement of the seat by rocking is that the body can stretch easily even if the back tilt angle is small, so that the rest function per unit back tilt angle can be enhanced compared to the case where only the back tilt is tilted. (A high comfort state can be secured without locking at a large angle.)
- the backrest tilts backward with its lower end moving forward.
- this tilting mode since the upper body of the seated person does not largely warp backward when locking, for example, a personal computer operation
- the keyboard on the desk or operating the mouse while looking at the monitor (display) like this the body does not move away from the desk even if it is locked, so you can work comfortably while taking the locking posture. Can continue to do.
- Patent Document 1 the seat is tilted backward as a whole because the height of the front end does not change and the rear end is lowered in the forward movement state, and the backrest is lowered by tilting the seat backward in this way.
- the distance between the lower end of the backrest and the rear end of the seat is almost the same, there is no relative slip between the backrest and the back, and as a result, the seater's shirt and back move vertically when rocking. It is understood that the phenomenon of “shirt drowning” can be prevented.
- Patent Document 2 also discloses a chair similar to Patent Document 1.
- a seat will be described.
- a seat base 102 is mounted on a base (chassis body) 30 fixed to an upper end of a leg (gas cylinder) so as to be slidable back and forth. Is installed.
- a connecting member (channel member) 136 rising upward behind the backrest 20 is fixed to the rear end of the seat base 102, and a lower portion of the backrest 20 is connected to the connecting member 136 through a bracket 130 so as to be slidable up and down. Has been.
- the back support bar 104 rising upward behind the backrest 20 and the connecting member 136 is fixed to the base 30, and the upper end of the back support bar 104 and the back portion of the backrest 20 are slidably connected. Yes.
- Patent Document 2 when a seated person leans on the backrest 20, the backrest 20 tilts around the upper end of the back support bar 104 and moves downward as a whole, and the seat 18 interlocks with the downward movement of the backrest 20. Then move forward.
- Patent Document 3 discloses that the lower part of the backrest is a horizontally long pin as a means for attaching the back shell to the backrest frame disposed behind the back shell. It is disclosed that the upper end portion of the backrest is slidably connected to the back frame while being connected to the backrest frame.
- Patent Document 1 since the seat only tilts backward as a whole at the time of locking, the rear tilt angle of the backrest is reduced by the amount of the angle at which the seat tilts backward. It can be said that the effect of enhancing the property is not sufficiently achieved.
- Patent Document 2 the seat 20 only moves forward while the backrest 20 moves down when locking, and therefore the function of wrapping the body of the seated person with the backrest and the seat is poor when locking. It can be said that there is a high possibility that ensuring comfort is insufficient. Further, in Patent Document 2, the height of the rear end of the seat and the rear end of the backrest changes during locking, which may cause the above-mentioned shirt curling phenomenon.
- Patent Document 1 describes a problem that Patent Document 1 combines a slide mechanism and a link mechanism in order to interlock a backrest and a seat, and thus has a complicated structure as a whole.
- Patent Document 2 uses a simple slide mechanism to link the backrest and the seat, the structure can be simplified.
- the moving part is exposed, not only the aesthetics are bad, but also the slide mechanism part.
- a person may pinch a finger or an object (for example, clothes).
- the present invention has been made to improve the current situation.
- Various improvements are disclosed in the present application, and it should also be understood as an object of the present application to provide a rocking chair with these improvements.
- the rocking chair according to the present invention comprises a seat on which a person sits, a backrest on which a seated person leans, and a base portion that supports the seat and the backrest, and when the seated person leans on the backrest,
- the seat has a basic structure in which the seat moves forward and the backrest tilts backward to a state where the upper end is retracted and the lower end is advanced.
- the seat includes a first portion including a front end thereof and a second portion including a rear end thereof, and the second portion is tilted rearward in a side view with respect to the first portion.
- the backrest is supported by a backrest guide means so as to descend while tilting backward, and the second portion of the seat and the backrest are tilted backward when the backrest is lowered. For this reason, when a seated person leans on the backrest, the backrest tilts backward as a whole, and the seat moves forward as a whole while the second portion tilts backward.
- the first invention constitutes a superordinate concept, and the first invention can be developed in various ways. Examples thereof are listed as the second to ninth inventions.
- the second invention embodies the first invention. That is, the second invention is the first invention, wherein the backrest includes a back plate and a cushion material stretched on the front surface thereof, and the back guide means is fixed to the base portion and is on the back side of the back plate.
- the back column is positioned at a height between the upper and lower ends of the back plate, and the backrest is lowered to the upper end of the back column.
- a guide portion that supports the vehicle so as to tilt backward is provided.
- the backrest has a back cover disposed behind the back plate, and the back cover is connected to the back column so as to tilt while being lowered,
- the back plate is attached to the back cover in a state where it can be deformed by the body pressure of the seated person, and the back cover and the second portion of the seat are connected to move together.
- the back column is disposed at the left and right intermediate portion of the backrest, while the left and right intermediate portion of the back cover has a long groove with a downward opening in which the back column is fitted.
- the back cover and the back column are provided with cover means for covering the guide portion irrespective of the backward inclination of the backrest.
- the back column is made of metal, and an upper end portion of the back column is provided with left and right lateral guide pins as elements of the backrest guide means, Similarly, the inner surface of the long groove is provided with a vertically long guide groove in which the guide pin is slidably fitted as an element of the back guide means, and the back column supports the column cover for closing the long groove of the back cover.
- the backrest guide means is covered from the back regardless of whether the backrest is tilted backward by arranging the upper end portion of the column cover inside the back cover.
- the first portion of the seat is attached to a seat receiving shell disposed below the seat, and the seat receiving shell is attached to the base portion so as to be movable back and forth.
- the back cover has a forward-facing portion extending below the second portion of the seat, and connects the second portion of the seat and the forward-facing portion of the back cover so as to be relatively movable, and The rear end edge of the seat receiving shell and the front end edge of the forward facing portion of the back cover overlap each other in a state where a person cannot insert a finger.
- the backrest is connected to a back column so as to move downward while tilting backward with a substantially intermediate portion of the backrest or a height region close thereto as a fulcrum. Yes.
- the seat provided with a resin seat plate and a cushion material stretched on the upper surface thereof, and a hinge portion is formed on the seat plate so that the seat plate can be bent?
- the first portion and the second portion are configured by dividing the front and rear portions and connecting them so that they can be bent.
- the first portion of the seat is attached to a first intermediate metal fitting connected to the base portion so as to be movable back and forth, while the second portion of the seat is It is attached to the 2nd intermediate metal fitting connected with the 1st intermediate metal fitting so that back tilting is possible, and the backrest is attached to the back column fixed to the 2nd metal fitting.
- the seat is linked to the downward movement and the rearward tilting of the backrest when locking.
- the second portion tilts backward while moving forward.
- the tilt angle of the backrest can be set as much as possible while preventing or suppressing the so-called shirt curling by preventing or suppressing the interval between the rear end of the seat and the lower end of the backrest from widening. Because it can be made larger, it can improve the comfort when locking compared to when the entire seat is tilted backwards or when the seat is just advanced (prevents the thigh from being pushed up by the front edge of the seat during locking) it can.).
- the backrest tilts around the position between the upper and lower ends, and the upper body of the occupant does not move backward greatly when locking, so it is easy to see the monitor on the desk in the locked state.
- the chair of the present invention is suitable for the current office work. Furthermore, because the seat's second part (rear part) tilts backward when locking, the body is stable and fit when locking, so the seated person sits deeply on the chair even when locked. This is one of the major features of the present invention.
- the backrest moves little backwards even if it is tilted backward, it is possible to significantly reduce the obstacles even when the other person is in the rocking state when passing behind the chair. Also, since the upper body of the seated person does not greatly warp when rocking, it does not require high abdominal muscle strength to return the body to the non-locking state, and therefore, generally for women with weak abs compared to men Is also suitable.
- the present invention is suitable as a chair used by women because it can be rocked (reclined) in an inconspicuous state.
- the back plate is deformed by the body pressure of the seated person, so that the cushioning property at the time of locking can be improved.
- the back cover functions as a strength member of the backrest, there is no fear of strength despite being a backrest that can secure the option.
- the back cover that functions as a strength member of the backrest and the second portion of the seat are connected, the number of members can be suppressed and the structure can be simplified. As described above, the second invention has many advantages.
- the forms of the back column and the back cover can be embodied in various ways. For example, it is possible to dispose back struts at two positions on the left and right sides and connect the back cover to the left and right back struts. However, this may complicate the structure.
- the structure of the fourth invention has a simple structure because the back column is provided in one place, and the guide part of the back column is always covered with the cover means regardless of the presence or absence of locking. There is no problem of people pinching their fingers or objects, and safety can be ensured.
- the back strut can be entirely made of resin or aluminum die-cast, but if the whole is made of resin, there may be anxiety in terms of strength, On the other hand, if the whole is made of aluminum die cast, the cost may increase. On the other hand, if the back column is made of metal and a resin column cover is attached thereto as in the fifth invention, there is an advantage that the cost can be suppressed while ensuring the strength and aesthetics.
- the forward facing portion of the back cover can be used as the lower cover of the second portion of the seat, so that the structure of the entire chair is simplified.
- the seat receiving shell and the back cover tilt relative to each other while advancing together at the time of locking, but the state where the rear end of the seat receiving shell and the front end of the forward facing portion of the back cover overlap is maintained. Even if a person puts his hand under the seat, the finger is not caught between the rear end of the seat receiving shell and the front end of the back cover, which is safe.
- the tilting fulcrum (rotating fulcrum) of the backrest is at a high position, it is possible to accurately prevent the body from being warped during locking, and the backrest is large when locking. It is possible to use a weak locking spring means by suppressing the moment from acting.
- a large moment does not occur in the backrest when rocking, so that even if there is a difference in the weight of the seated person, a large moment difference does not appear in the backrest; Part of the person's body weight is acting, and therefore the weight of the seated person when rocking acts as a reaction force that prevents tilting after the backrest, but the reaction force is proportional to the weight of the seated person, for these two reasons, even if the initial elastic force of the locking spring is not adjusted, an appropriate reaction force is applied to persons having different weights. Accordingly, it is possible to simplify the structure by eliminating the adjusting device for the initial elastic force of the locking spring (note that providing an elastic adjusting device is not excluded).
- the seat can have the first part and the second part as separate members, if the structure of the eighth invention is adopted, even if the seat plate bends, the cushion Since the integrity of the seat plate is maintained by the material, there is an advantage that the sitting comfort is excellent.
- the seat plate is formed as an integral structure and has a hinge portion, the connecting means for connecting the first portion and the second portion is not necessary, so that the structure can be simplified accordingly.
- the backrest may not necessarily require a back cover, and the back cover may be detachable, for example, to have only a protective function. In such a case, by adopting the ninth invention, the backrest and the seat can be interlocked without requiring a back cover.
- FIG. 1 is an overall perspective view of a rocking chair according to a first embodiment. It is a vertical side view of a non-locking state (normal state). It is a vertical side view of a locked state.
- FIG. (A) is a perspective view on the back side
- (B) is a perspective view on the back side with the back support cover body removed.
- (A) is the side view which shows the inside of a base main body
- (B) is the isolation
- A) is the perspective view seen from the downward direction of the turtle which shows the overlap part of a back cover and a seat outer shell
- (B) is the perspective view which looked at the figure of (A) from the top.
- FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12.
- FIG. 21 is a cross-sectional view taken along the line XXII-XXII in FIG.
- FIG. 21 is a cross-sectional view taken along the line XXIII-XXIII in FIG. 20 in a state where the whole is displayed.
- FIG. 24 is a cross-sectional view taken along line XXIV-XXIV in FIG. 23.
- FIG. 20 is a cross-sectional view taken along line XXV-XXV in FIG. 19. It is a rear view of a back part.
- (A) is a longitudinal side view
- (B) is a separated sectional view showing the main part of the backrest guide means. It is a vertical side view in a locking state. It is the typical side view which showed the relationship between a chair and the monitor on a desk.
- FIG. 1 to 16 show the first embodiment
- FIG. 17 and subsequent drawings show the second embodiment.
- description will be made sequentially.
- the words “front and rear”, “front”, “back”, and “left and right” are used, and these words indicate the posture of a person sitting on a rocking chair (hereinafter simply referred to as a chair).
- the standard. “Front view” is a state viewed from the direction facing the seated person.
- the chair of this embodiment is applied to a so-called rotating chair for office use, and the chair has a leg device 1, a base portion 2, a seat 3, a backrest 4, a back support 5, and an armrest device 7 as main elements. Yes.
- the leg device 1 has a leg column 6 made of a gas cylinder.
- the leg support 6 is fitted to the center of a leg body having a plurality of (generally five) branch legs extending radially.
- the base portion 2 includes a housing-like base main body 9 with an upward opening fixed to the upper end of the leg support 6, and a seat receiver that is slidably attached to the upper end of the base main body 9. It has a metal fitting 10.
- the armrest device 7 is an optional part and is detachably attached to the base body 9 (described later). When the armrest device 7 is removed, the base body 9 has a mounting hole. Therefore, the mounting hole is closed with a removable resin cover 9d (see FIG. 6, FIG. 7B, etc.).
- the seat 3 includes a seat plate (seat inner shell) 12 and a seat cushion body 13 stretched on the upper surface thereof.
- the seat cushion body 13 is covered with a skin material such as a cloth.
- a substantially front half of the seat plate 12 is attached to the upper surface of a seat receiving shell (seat outer shell) 11.
- the seat receiving shell 11 and the seat plate 12 are injection molded products made of a synthetic resin material such as PP (polypropylene), but may be made of metal or wood.
- the seat plate 12 has a first portion 12a constituting the front portion and a second portion 12b constituting the rear portion, and the seat 3 is between the first portion 12a and the second portion 12b.
- a group of slits 12c long in the left-right direction is formed.
- a large number of slits 12c are formed around a portion where the body pressure of the seated person acts strongly (see FIGS. 4, 8, and 9A).
- FIG. 9A at several slits 12c, cross-section upward U-shaped reinforcing portions 12d arranged so that both front and rear portions sandwiching the slit 12c straddle the slit 12c from below. It is connected with. For this reason, it is prevented that the slit 12c spreads excessively.
- the group of the slits 12c is allowed to extend and deform downward due to the body pressure of the seated person, and as a result, high fit is obtained. Moreover, the part in which the slit 12c was formed among the seat boards 12 is a hinge part (bendable area
- the center line (crease line) of the bending of the seat 3 is set at a position where the tail bone of the seated person hits or slightly in front of it.
- the hinge part of this embodiment has a planar expansion, a single linear shape may be sufficient as a hinge part. Since the second portion 12b of the seat plate 12 is connected to a forward facing portion (base portion) 14b of the back cover 14 to be described later, when the back cover 14 is tilted backward (while descending), the second portion 12b ( 3b) is bent so as to sink with respect to the first portion 12a (3a).
- the seat shell 11 can be regarded as a part of the seat 3.
- the seat portion is constituted by the seat 3 and the seat receiving shell 11.
- the backrest 4 mainly includes a back cover 14, a back plate 15 attached to the front surface of the back cover 14, and a back cushion body 16 attached to the front surface of the back plate 15. ing.
- a skin material such as a cloth is stretched on the back cushion body 16.
- the back cover 14 can be rephrased as a back outer shell, and the back plate 15 can be rephrased as a back inner shell.
- the back cover 14 and the back plate 15 are injection molded products made of a synthetic resin material such as PP.
- the back cover 14 has a main body portion 14a that supports the back plate 15 and a forward-facing portion 14b that protrudes forward from the lower end of the main body portion 14a. Therefore, the back cover 14 has a substantially L-shaped appearance in a side view. As described above, the forward facing portion 14 b of the back cover 14 is connected to the second portion 12 b of the seat plate 12. The back cover 14 is connected to the back support 5 so as to be able to move down and tilt.
- the backrest 4 descends while being tilted backward so that the upper end is retracted and the lower end is advanced, while the seat 3 is moving forward as a whole and the second portion 3b is the first portion 3a. Tilt backwards. Details of each part will be described below.
- the back support 5 of the present embodiment includes a back column 17 composed of a pair of left and right pipes formed in an L shape in a side view, and a column cover 18 that can be attached to and detached from the back column 17 from the back side.
- the left and right back columns 17 are connected by a reinforcing material 17a.
- the back support 5 can be an integrally molded product made of a resin material or an aluminum molded product.
- the base of the back column 17 constituting the back column 17 is fixed to the base substrate 19 fixed to the inner surface of the base body 9 by welding or the like, and is further held and held by the reinforcing bracket 20. (See, for example, FIGS. 4 and 6).
- the back column 17 may be composed of one pipe material or channel material.
- the base body 9 has a box-like appearance opened upward as described above, and the rear end is open.
- the above-described base substrate 19 is fixed to the rear inner surface by welding.
- a bush 21 opened vertically is fixed to the base body 9 and the base substrate 19, and the upper end of the leg support 6 is fitted to the bush 21 from below.
- a lift lever 22 for operating the push valve of the leg column 6 is provided on one side surface of the base body 9, and the other side surface of the base body 9 is disposed on the other side surface.
- a lock lever 23 is provided for switching the backrest 4 between a lockable state and a nonlockable state.
- the left and right side plates 9a of the base body 9 are formed with a longitudinally long slot 24, and a resin bush 24a is attached to the slot 24, A left and right long connecting shaft 25 is inserted into the left and right bushes 24a so as to be slidable back and forth.
- the connecting shaft 25 is inserted through the left and right sides of the rear end portion of the seat bracket 10. For this reason, the mounting hole 26 is vacant in the seat bracket 10.
- the seat plate 12 is fastened to the upper surface of the seat bracket 10 with screws.
- a rocking spring (coil spring) 30 that expands and contracts in the front-rear direction is disposed inside the base body 9 as an example of an elastic means for locking.
- a downward spring receiving support piece 29 is formed at the rear end of the seat receiving bracket 10.
- the locking spring 30 is supported from behind by a spring receiving support piece 29 via a rear spring receiving 31a.
- the front end of the locking spring 30 is supported by the front wall of the base body 9 via the front spring receiver 31b. Therefore, the seat bracket 10 moves forward against the locking spring 30.
- left and right horizontal pieces 9 b are integrally formed at the upper ends of the left and right side plates 9 a in the base body 9, and a resin slide auxiliary body 28 is attached to the horizontal pieces 9 b. Yes.
- the slide auxiliary body 28 has a substantially groove-shaped cross section so as to hold the horizontal piece 9b.
- a groove-shaped holding portion 27 for wrapping the slide auxiliary body 28 from the outside is formed on the left and right side portions of the seat bracket 10. As the holding portion 27 slides with respect to the slide auxiliary body 28, the seat bracket 10 slides back and forth smoothly with respect to the base body 9.
- the seat receiving shell 11 has a receiving portion 11a located below the holding portion 27 of the seat receiving metal fitting 10, and the weir body 11b faces upward at the tip of the receiving portion 11a. It protrudes (see also FIG. 15B). Accordingly, the receiving portion 11a has a bowl shape opened upward. Therefore, even if grease is dripped when grease is applied to the outer surface of the slide auxiliary body 28, the grease can be received by the receiving portion 11a. For this reason, it can prevent that a floor gets dirty. Such configurations and effects are not suggested or taught in Patent Documents 1 to 3.
- a long groove 40 opened downward is formed in the left and right intermediate portion of the back cover 14, and therefore the forward portion 14b of the back cover 14 is divided into right and left.
- the bearing part 32 is formed in the front end of the left-right front part 14b in the back cover 14, This left-right bearing part 32 and the rear end of the right-and-left both-sides board 9a in the base main body 9 are connected with the connection shaft 25. .
- the holding portion 27 of the seat bracket 10 is covered with the seat shell 11.
- a cover portion 33 is integrally formed at the rear end of the seat receiving shell 11, and the connecting shaft 25 is surrounded by the cover portion 33. .
- the connecting shaft 25 is held so as not to be detached from the base body 9.
- left and right step portions 34 are formed at the rear end portion of the seat receiving shell 11 so as to overlap the front end edge of the front facing portion 14b of the back cover 14 from above. Yes.
- a lock arm 34 for switching the backrest 4 between a lockable state and a nonlockable state is disposed inside the base body 9.
- the lock arm 34 is connected to the base body 9 so as to rotate up and down around its front end.
- a long hole 35 is formed in which a crank portion 23a formed at the tip of the operation lever 23 (see FIG. 7B) is fitted.
- the back cover 14 has the vertically long slot 40 opened downward.
- the long groove 40 is closed by the back support 5 in both the normal state where the backrest 4 is not locked and the state where the backrest 4 is locked.
- the long groove 40 extends to a vertical halfway height position of the main body portion 14a in the back cover 14.
- a plurality of connecting portions 41 straddling the long groove 40 are integrally formed at a midway portion in the front-rear direction of the forward facing portion 14b and a midway portion in the vertical direction of the main body portion 14a.
- a group of grid-like reinforcing ribs 42 is formed on the inner surface of the back cover 14 on the outer side of the long groove 40 to improve the rigidity.
- a reinforcing bracket 51 is fixed to the upper end portion of the back column 17, and the reinforcing bracket 51 is guided as a part of the backrest guide means (guide portion) described in the claims.
- the pin 43 is fixed.
- the left and right ends of the guide pin 43 are exposed to the left and right outside of the reinforcing bracket 51.
- upper and lower longitudinal guide grooves 44 are formed as opposed to the upper and lower inner surfaces of the long groove 40 in the back cover 14 as a part of the backrest guide means.
- Guide members 45 having sliding grooves 45a are fitted in the left and right guide grooves 44, and the end portions of the guide pins 43 are fitted in the sliding grooves 45a of the guide members 45 so as to be slidable in the vertical direction (guide members). It is also possible to say that a guide groove is formed in 45.
- the guide member 45 is curved in a forward concave shape with a gentle curvature in a side view. Moreover, it is preferable that the guide member 45 is manufactured with resin which has little sliding resistance with the metal guide pins 43 and has wear resistance.
- the guide member 45 may be made of metal, and a fluorine coating may be applied to a sliding portion with the guide pin 43.
- the guide member 45 may be fixed to the guide groove 44 or may be mounted in a state where it can move slightly.
- the guide pin 43 can be directly fitted into the guide groove 44 of the back cover 14.
- the guide member 45 may be provided on the back support 5 and the guide pin 43 may be attached to the back cover 14.
- the column cover 18 is detachably attached to the back column 17 from behind.
- a substantially U-shaped fitting groove 46a that fits in the back column 17 (see FIG. 6B) is formed in the catch rib 46 formed on the inner surface of the column cover 18.
- a retaining groove 47 is formed in the opening of the fitting groove 46a.
- the column cover 18 has left and right side plates 18a, and notches 48 for releasing both ends of the guide pins 43 are formed on the upper portions of the left and right side plates. Further, as shown in FIG. 11 (B), a pocket-like fitting portion 49 opened downward is formed on the upper surface of the support column cover 18, and an engagement claw portion is formed on the lower surface of the support column cover 18. 50 is provided.
- the fitting portion 49 is fitted into the upper end of the reinforcing bracket 51 from above, and the catch rib 46 is fitted into the back column 17.
- the claw portion 50 may be fitted into the engagement hole 50 ′ at the rear end of the base substrate 19.
- the column cover 18 is attached to the back column 17, the back cover 14 is attached to the back column 17, and then the back plate 15 is attached to the back cover 14.
- the column cover 18 can be attached to the back column 17 last (FIG. 5B shows this state).
- the upper ends of the guide groove 44 and the guide member 45 are positioned above the upper end edge 40 a of the long groove 40. Further, in the normal state in which the backrest 4 is not locked, the upper end edge of the column cover 18 enters the inner side (upper side) of the upper end edge of the long groove 40 by a slight dimension H1. In other words, the upper end portion of the column cover 18 is covered with the back cover 14 from the back even in the normal state.
- the back cover 14 moves downward while rotating (tilting) in a seesaw shape around the guide pin 43, but the support cover 17 is fixed and does not move even in the locked state. It is always held in a state covered with the back cover 14 and the column cover 18. Therefore, the appearance is good and, for example, a person does not put a finger between the guide pin 43 and the back cover 14 (safety can be ensured).
- the backrest 4 tilts backward while sinking with respect to the back support 5 having a constant posture.
- the movement of the back cover 14 must not be hindered by the column cover 18.
- the back surface of the back cover 14 and the back surface of the support column cover 18 are set so as to be substantially aligned with respect to the normal state.
- the back cover 14 has its lower end moved forward. Since it tilts, the upper end edge 40a of the long groove 40 draws a trajectory that descends while moving forward. Therefore, as clearly shown in FIGS. 3 and 13, the portion of the column cover 18 where the back cover 14 slides is stepped inward. For this reason, the column cover 18 has a stepped portion 18b. And since there exists a possibility that a finger
- the gap between the inner surface of the long groove 40 and the side plate 18a of the column cover 18 is made as small as possible from the viewpoint of aesthetics and prevention of finger pinching.
- the upper end portion of the column cover 18 is inserted into the back cover 14 to constitute the cover means described in the claims.
- the back plate 15 As a method for attaching the back plate 14 to the back cover 14, fitting of engaging claws is adopted. Therefore, for example, as shown in FIG. 7, on the front surface of the back cover 14, three left and right upper engaging claws 53 arranged at the upper end thereof, and middle engaging claws arranged on both right and left sides of the substantially upper and lower portions. 54 and a lower engaging claw 55 arranged on the left and right side of the lower part project.
- the back plate 15 is provided with three stages of engaging portions 56, 57, 58 corresponding to the engaging claws 53, 54, 55 of the back cover 14.
- the catching method is also employed for connecting the second portion 12b of the seat plate 12 and the forward facing portion 14b of the back cover 14. That is, as shown in FIG. 12, the rear connecting hole 59 of the upper and lower openings and the rear engaging claw 60 having a front view shape located on the outside thereof are formed in the left and right forward portions 14b of the back cover 14, while the seat plate 12 As shown in FIG. 9A, the second portion 12b includes a rear stopper 61 that fits into the rear engagement hole 59, and a second side member that fits into the rear engagement claw 60 by sliding from the front.
- the nail 62 is formed.
- the second portion 12b is held so that it cannot move left and right and cannot be separated upward from the front portion 14b, and the rear stopper 61 is fitted into the rear engaging hole 60.
- the second portion 12b is held so as not to move back and forth.
- the first portion 12a of the seat plate 12 is also connected to the seat shell 11 by catch means. That is, as shown in FIG. 9, the first portion 12 a of the seat plate 12 has a side-view-type upper front stopper 63 positioned at the front left and right intermediate portion, and a pair of front and rear provided on the left and right side portions. While the female first side engaging claw 64 is formed, as shown in FIG. 8, the seat receiving shell 11 has a lower front stopper 65 with which the front stopper 63 is engaged from the front, and a female first side engagement member. A male first side engagement claw 66 having a front-view shape, in which the joint claw 64 is fitted by sliding from the front, is formed.
- the first portion 12a of the seat plate 12 is held in such a way that the female first side engaging claw 64 is fitted to the male first side engaging claw 66 so that it cannot move left and right and cannot move upward, and an upper front stopper. 63 is fitted to the lower front stopper 65 from the front so that it cannot be moved backward.
- the forward movement of the seat plate 12 is prevented by the rear stopper 61 of the second portion 12b fitting into the rear engagement hole 60 of the back cover 14.
- the back cover 14 prevents the guide pins 43 from being exposed while arranging the back support 5 in the long groove 40 of the back cover 14, so that the whole is refreshed to improve the appearance and safety. Can be secured. This is one of the advantages of this embodiment.
- various means for interlocking the backrest 4 and the seat 3 can be selected.
- the seat bracket 10 and the forward facing portion 14b of the back cover 14 are connected by a connecting pin 25 that can slide back and forth as in the present embodiment, it is easy.
- the backrest 4 and the seat 3 can be reliably and smoothly interlocked with a simple structure. This is also one of the advantages of this embodiment.
- the support column cover 18 cannot be lifted from above, which is excellent in maintaining the mounting state of the support column cover 18.
- a line-like hinge portion (folded line) can be provided, but the slits 12c arranged in the front and rear as in this embodiment.
- the hinge portion having a width in the front-rear direction is formed, the seat 3 at the time of rocking bends with a gentle curvature, so that there is an advantage that the seated person is not uncomfortable.
- the backrest 4 is attached to the back column 68, and a lumbar support 8 is disposed between the back column 68 and the backrest 4 so as to push the portion where the seated person's waist hits forward.
- the support 8 is supported by a back column 68 so that the height can be adjusted from behind.
- This embodiment also has a base body 9 that opens upward, and a first intermediate fitting 69 is attached to the base body 9 via a first pin 70 so as to be slidable back and forth.
- a second intermediate fitting 72 is connected to the rear end portion of the first intermediate fitting 69 by a horizontally long second pin (first support shaft) 71, and the seat 3 is connected to the first intermediate fitting 69 via the seat receiving shell 11.
- the base portion 2 further includes a lower bracket 73 fixed to the lower surface of the base body 9, and the back column 17 is fixed to the lower bracket 73.
- the first pin 70 is slidably fitted in a second elongated hole 74 formed in the base body 9 in the longitudinal direction and in the longitudinal direction, and the second pin 71 is also disposed in the horizontal direction in the longitudinal direction formed in the base body 9.
- the second elongated hole 75 is slidably fitted. Therefore, the first intermediate fitting 69 and the second intermediate fitting 72 and the seat receiving shell 11 and the seat 3 supported by the first intermediate fitting 69 and the seat 3 can slide back and forth, and the second intermediate fitting 72 has the second pin 71 attached thereto. Can tilt about the center.
- the seat shell 11 is separated into a first part 11a occupying about 2/3 of the front and a second part 11b occupying about 1/3 of the rear, and the first part 11a is the first intermediate fitting.
- the second portion 11 b is attached to the second intermediate fitting 72.
- the seat 3 is also composed of a first portion 3a occupying a range of about 2/3 of the front side and a second portion 3b occupying about 1/3 of the back side, and both the portions 3a, 3b are the second portion.
- 3b is continuous so as to be able to bend so as to tilt backward with respect to the first portion 3a.
- the first portion 3 a of the seat 3 is fixed to the first portion 11 a of the seat shell 11, and the second portion 3 b of the seat 3 is fixed to the second portion 11 b of the seat shell 11. Therefore, the seat 3 slides back and forth as a whole, and the second portion 3b can tilt backward with respect to the first portion 3a in a side view. It can be said that the ratio of the longitudinal dimension of the first portion 3a and the second portion 3b is preferably about 5: 5 to 7: 3.
- the back surface of the backrest 4 near the upper end is fixed to the upper end of the back column 68, and the lower end of the backrest 4 is provided with a downward stopper 76, and the downward stopper 76 is provided on the back column 68. It is in contact with the lateral stopper 77 so as to be movable up and down from the rear. For this reason, the protrusion mode of the backrest 4 can be changed by moving the lumbar support 8 up and down.
- a guide body 78 is fixed to a portion of the back column 68 near the upper end (approximately the upper and lower middle portion of the backrest 4), and the guide body 78 can be slid up and down on a guide pin 43 provided at the upper end of the back column 17. It is fitted. Therefore, when the seated person leans on the backrest 4, the backrest 4 descends at the front end while tilting so that the upper end is retracted and the lower end is advanced, and the second portion 3b is moved forward while the seat 3 is advanced as a whole. Tilt backwards.
- the armrest device 7 has an elbow post 79 fixed to the lower bracket 73, an elevating body 80 attached to the elbow post 79 so that the height can be adjusted, and an elbow rest 81 attached to the upper end of the elevating body 80.
- the elbow rest 81 has an elongated shape in plan view and is attached to the lifting body 80 so as to be able to turn horizontally.
- the elbow strut 79 is attached to the lower bracket 73 so as to be able to rotate back and forth. More precisely, when it is fully rotated forward, it tilts forward at a slight angle ⁇ 1 with respect to the vertical line, and when it is fully tilted backward, it tilts backward at an angle ⁇ 2 larger than the forward tilt angle ⁇ 1. It is supposed to fall back.
- the overall rotation angle ( ⁇ 1 + ⁇ 2) is set to about 25 ° (20 to 30 ° is preferable).
- the height of the elbow rest 81 should be slightly higher than D of the tabletop, but the armrest device 7 swings. If the fixed type is not used, the elbow rest 81 cannot be held by the top board D and the chair cannot be inserted deeply into the desk. On the other hand, in this embodiment, since the armrest device 7 tilts (rotates) back and forth, the chair can be deeply inserted into the desk. As a result, a preferred work position can be selected.
- the armrest device 7 is biased in a forward tilt direction by an absorber 82 in which a spring is incorporated. Further, the armrest 81 is biased by a posture holding device built in the armrest device 7 so that one end thereof returns to a horizontally long posture positioned above the seat 3. Moreover, the elbow rest 81 can be slid without resistance in the longitudinal direction (left-right direction) in the landscape orientation. Further, the elbow rest 81 is set so that the posture is maintained in a non-longitudinal posture extending in the front-rear direction.
- the first intermediate fitting 69 has a groove-like shape opened downward from the base body 9, and the first pin 70 and the second pin 71 penetrate the side plate 69a.
- the second long hole 74 and the second long hole 75 are formed in the side plate 9 a of the base body 9.
- a resin bush is attached to the second elongated hole 74, but a bush can also be attached to the second elongated hole 75.
- the base body 9 has a front plate 9e, and a front spring receiver 31b is fixed to the front plate 9e with screws.
- the rear spring receiver 31a is supported by the first pin 70 from behind.
- a rearward opening groove into which the first pin 70 is fitted is formed in the rear spring receiver 31b.
- the bottom plate of the base body 9 has a stepped portion below the front and rear spring receivers 31a and 31b and the locking spring 30, and the front and rear spring receivers 31a and 31b are held non-rotatable by this stepped portion.
- the horizontal width of the first intermediate fitting 69 is considerably larger than the horizontal width of the base body 9.
- the lower bracket 73 has a shape that opens upward, and has the same width as the first intermediate fitting 69.
- the horizontal portion 17 ′ of the back column 17 is welded to the left and right ends of the lower bracket 73.
- the second intermediate fitting 72 is in the form of an opening groove having a top plate and left and right side plates 72a facing downward, and the left and right side plates 72a are located outside the first intermediate fitting 69 so that the second pin 71 is provided. It penetrates the side plate 72a.
- the left and right side plates 72a protrude forward from the top plate, and the second pin 71 passes through the forward protrusion.
- the seat receiving shell 11 has a shallow tray-like shape that opens upward as a whole, and as shown in FIG.
- the rear end portion has a wall shape that rises while gently curving upward.
- the seat plate 12 is formed with a large number of slits 85 centering on the portion where the body pressure of the seated person acts strongly. It is allowed to stretch downward and deform by pressure, and as a result, high cushioning properties can be obtained.
- the seat plate 12 is separated into a first portion 12 a and a second portion 12 b corresponding to the seat 3, thereby allowing the seat 3 to be bent.
- the seat cushion body 13 is continuous throughout, but the seat cushion body 13 can also be separated into the first portion and the second portion, and the entire seat 3 can be separated.
- the seat plate 12 and the seat receiving shell 11 are integrally connected by fitting a male engaging portion 86 and a female engaging portion 87 provided at the left and right end portions thereof. ing.
- the male engaging portion 86 and the female engaging portion 87 are engaged with each other when the female engaging portion 87 is fitted into the male engaging portion 86 from above and then the seat plate 12 is slid rearward. So that it cannot be moved up and down.
- a pair of left and right front engaging claws 88 that are fitted to the top plate of the first intermediate fitting 69 from the front are formed at a portion of the seat shell 11 near the front end of the first portion 11 a. .
- the first intermediate fitting 69 is formed with a front notch 89 in which the front engagement claw 88 is fitted so that it cannot be displaced left and right.
- a rear stopper 91 is formed at the rear end portion of the first portion 11 a of the seat receiving shell 11 and fits into a rear cutout portion 90 formed at the rear end of the first intermediate fitting 69. Accordingly, the first portion 11a of the seat receiving shell 11 is held by the first intermediate fitting 69 so that it cannot be displaced back and forth and left and right and cannot be pulled upward.
- a stopper plate 93 protruding backward from the top plate is fixed to the lower surface of the top plate of the second intermediate fitting 72 with screws 94, and the rear end of the stopper plate 93 On the edge, two left and right cutouts 95 are formed.
- rear engagement claws 96 that fit into the cutouts 95 of the stopper plate 93 from the rear side are formed. Is formed. Accordingly, the seat receiving shell 11 is held by the front and rear engaging claws 88 and 96 so as not to be pulled upward.
- the first portion 11a and the second portion 11b of the seat shell 11 are integrally connected via the left and right hinge portions 11c.
- the hinge portion 11c is in a horizontal posture when viewed from the front. Therefore, the seat shell 11 is bent around the hinge portion 11c. In other words, the second portion 11b tilts backward with the hinge portion 11c as a fulcrum.
- FIG. 24 shows an example of the cross-sectional shape of the hinge portion 11c.
- the thickness is made equal to both the portions 11a and 11b without any special work.
- a trapezoidal groove or V-groove
- a trapezoidal groove or V-groove
- a large number of ribs extending vertically and horizontally are formed on the lower surfaces of both portions 11a and 11b constituting the seat receiving shell 11.
- the elbow strut 79 has an inward horizontal portion 79a, and this horizontal portion 79a is rotated forward and backward via a bush 98 on a side bracket 97 fixed to the side surface of the lower bracket 73 by welding. It is attached movably.
- a downward arm 99 is fixed to a portion of the horizontal portion 79 a located outside the side bracket 97, and the absorber 82 can rotate relative to the lower end of the downward arm 99 and the side bracket 97 via pins 100 and 101. It is connected to.
- the side bracket 97 has a hole (not shown) for allowing the absorber 82 to escape.
- FIGS. 26 and 27 the backrest 4 and its mounting structure will be described with reference to FIGS. 26 and 27 in addition to the previous drawings.
- two back struts 68 are arranged on both the left and right sides of the vertically long center line, and left and right horizontally long upper members 102 are fixed to the upper ends of the back struts 68.
- a back plate 15 is fixed.
- the back plate 15 is integrally formed with a back rib 103 that overlaps the upper member 102 of the back column 68, and the back rib 103 is fixed to the upper member 102.
- the lower portions of the left and right back posts 68 are inclined backward, while the rear surface of the second intermediate bracket 72 is welded with a rear plate 104 inclined in a side view, and the back posts 68 are rear plate 104 (FIG. 18). See).
- the lateral stopper 77 is fixed to the left and right back posts 68 by welding.
- the left and right back posts 68 are connected by a reinforcing member.
- One back column 17 is disposed on each of the left and right sides of the pair of back columns 68, and left and right guide pins 43 are attached to the upper ends of the left and right back columns 17 via upper brackets 105.
- the upper bracket 105 may be welded to the back column 17 or may be screwed.
- the guide body 78 includes a resin slider 106 that sandwiches the guide pin 43 from the front, the front plate 107 fixed to the back column 68, and a case 108 that fits the slider 106 from the back. Yes.
- a recess 109 for allowing vertical movement relative to the guide pin 43 is formed on the mating surface of the slider 106 so as to face each other.
- the front plate 107 and the case 108 are provided with protrusions formed on the slider 106.
- the window hole 110 that fits in is open.
- the front and rear sliders 106 are fitted to the case 108 so as to overlap each other, and the front plate 107 and the case 108 are connected to the screws 111 with the protrusions of the slider 106 fitted to the front plate 107 and the case 108. It is concluded with.
- FIG. 28 is a longitudinal sectional side view in the locked state.
- the backrest 4 tilts backward about the second pin 71, but the second pin 71 moves forward, so the backrest 4
- the second part 3b tilts backward while the seat 3 moves forward as a whole while tilting backward about the substantially middle part.
- FIG. 29A is a schematic diagram (side view) showing the relationship between the chair of the embodiment and the monitor on the desk
- FIG. 29B is a schematic plan view of the usage state.
- the backrest 4, the second intermediate fitting 72, and the back column 68 can be thought of as an integral structure. Therefore, the backrest 4 is tilted by the guide action of the second elongated hole 75 and the guide pin 43. Since the elongated hole 75 has a horizontal posture and the guide body 10 moves in the vertical direction, the backrest 4 is in the same state as rotating (swinging) around the virtual center so that the swing swings, for example. It has become. In this embodiment, as shown in FIG. 17, the virtual center 112 when the backrest 4 tilts (rotates, swings) is positioned near the upper surface of the elbow rest 81.
- the elbow rest 81 moves back and forth, and the virtual center 112 itself moves due to the tilting of the backrest 4, but in any case, the virtual center 112 is fully retracted from the vicinity of the upper surface of the elbow rest 81. It is set so as to be positioned between the upper surface of the elbow rest 81 and the vicinity thereof. Assuming that the seated person is a person with a general physique, the turning virtual center 112 of the backrest 4 is located in the vicinity of the front surface of the seated person's abdomen (particularly around the navel). Further, when the seat 3 is taken as a reference, the virtual center 64 is set so that the height from the seating surface is about 20 to 30 cm at the front and rear positions near the front and rear intermediate portion of the seat 3.
- the seat receiving shell is not necessarily required, and for example, the seat plate can be directly attached to the seat receiving bracket (intermediate bracket).
- the second part of the seat can be bent and deformed so that the rear end thereof descends the most. Furthermore, it is also possible to bend the second portion stepwise.
- the first part is moved forward while being slightly tilted during locking, the first part is slightly tilted backward while the seat is advanced as a whole, and the second part is tilted backward at a larger angle than the first part. It is also possible to adopt such a configuration.
- Various means such as a gas cylinder or rubber can be used as the spring means for imparting resistance to locking.
- the armrest device When the armrest device is provided, it can be fixed to the second intermediate fitting of the second embodiment or attached to the back support of both embodiments.
- the seat bracket and the intermediate bracket can be made of resin.
- the invention of the present application can be embodied in a chair and exhibit its usefulness. Therefore, it can be used industrially.
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Abstract
Description
更に、ロッキング時に座が前進すると身体が伸び勝手になるため、臀部は背もたれを支点にして前向きに押される傾向を呈しており、その結果、特許文献1のようにロッキング時に座全体が後傾するに過ぎない構成では、着座者は臀部(及び大腿部)が座に対して前向きに滑るような感覚を受けることが予想され、このためロッキング時のフィット性が必ずしも十分と言い難い可能性がある。特許文献2も同様である。
本願発明では、座の第2部分と背もたれとが連結されているため、ロッキング時には、背もたれの下降動及び後傾動に連動して座は全体的に前進しつつ第2部分が後傾する。そしで、座の第2部分が後傾することにより、着座者の臀部が沈み込む傾向を呈して高いフィット性を確保できる。また、座の第2部分が後傾することにより、座の後端と背もたれの下端との間隔が広がることを防止又は抑制していわゆるシャツ捲れを防止又は抑制しつつ、背もたれの傾動角度をできるだけ大きくできるため、座の全体が後傾する場合や座が単に前進するに過ぎない場合に比べて、ロッキング時の安楽性を向上できる(ロッキングに際しての座の前端による大腿部の突き上げ感も防止できる。)。
第2発明では、ロッキングに際して背もたれに作用した荷重はバック支柱で後ろから支持されるため、背もたれの支持安定性に優れていて実用性が高い。
第3発明では、背板は着座者の体圧で変形するためロッキング時のクッション性を向上できる。また、バックカバーが背もたれの強度メンバーとして機能するため、クョション性を確保できる背もたれでありながら強度的な不安は生じない。更に、背もたれの強度メンバーとして機能するバックカバーと座の第2部分とを連結したものであるため、部材点数を抑制して構造を簡単化できる。このように、第2発明は多くの利点を有している。
バック支柱とバックカバーとの形態は様々に具体化できる。例えば、左右2カ所にバック支柱を互いに離反して配置し、これら左右のバック支柱にバックカバーを連結することも可能である。しかし、これでは構造が複雑化する可能性がある。これに対して第4発明の構成ではバック支柱は1箇所に設けているため構造が簡単であり、しかも、バック支柱のガイド部はロッキングの有無に関係なく常にカバー手段で覆われているため、人が指を挟んだり物が挟まったりする問題はなく、安全性を確保できる。
(5).第5発明に特有の効果
バック支柱は全体を樹脂製としたりアルミダイキャスト製としたりすることも可能であるが、全体を樹脂製にすると強度面で不安が生じる場合があり、他方、全体をアルミダイキャスト製にするとコストが嵩むおそれがある。これに対して第5発明のようにバック支柱を金属製としてこれに樹脂製の支柱カバーを取り付けると、強度及び美感を確保しつつコストを抑制できる利点がある。
第6発明によると、バックカバーの前向き部を座における第2部分の下カバーに兼用できるため、椅子全体の構造が簡単になる。また、ロッキングに際して座受けシェルとバックカバーとは一緒に前進しつつ相対的に傾動するが、座受けシェルの後端とバックカバーにおける前向き部の前端部とが重なった状態が保持されるため、人が手を座の下方に差しのべても座受けシェルの後端とバックカバーの前端とで指を挟むことはなく、安全である。
さて、特許文献2では、ロッキングに際して背もたれの回動によって連結部材(チャンネルメンバー)136を前向きに押しており、この連結部材(チャンネルメンバー)136の前向き移動によって座を前進させている。従って、背もたれはロッキングに際してその下端が前進動するように、回動支点はなるべく下端寄りに配置せねばならない。すると、ロッキングに際して身体はのけ反り気味になるのみならず、ロッキングに抵抗を付与するばね手段も強さの強いものが必要なる。
座は第1部分と第2部分とを別部材とすることも可能であるが、第8発明の構成を採用すると、座板が屈曲してもクッション材によって座板の一体性は保持されるため、座り心地が優れている利点がある。この場合、座板を一体構造にしてヒンジ部を有する形態すると、第1部分と第2部分とを繋ぐ連結手段は不要になるため、それだけ構造を簡素化できる。
背もたれは必ずしもバックカバーを要しない場合もあり、また、バックカバーは例えば着脱式にして保護機能だけを持たせたい場合も想定される。このような場合、第9発明を採用することにより、バックカバーを要することなく背もたれと座とを連動させることができる。
まず、主として図1~図4に基づいて概要を説明する。本実施形態の椅子は事務用のいわゆる回転椅子に適用しており、椅子は、主要要素として、脚装置1、ベース部2、座3、背もたれ4、バックサポート5、肘掛け装置7を有している。
座板12は、大雑把に言って、前部を構成する第1部分12aと後部を構成する第2部分12bとを有し、第1部分12aと第2部分12bとの間には座3の左右方向に長いスリット12cの群が形成されている。スリット12cは着座者の体圧が強く作用する部分を中心にして多数形成されている(図4,図8,図9(A)参照)。図9(A)に示すように、数箇所のスリット12cの箇所では、当該スリット12cを挟んだ前後両側の部分がスリット12cを下から跨ぐように配置された断面上向きU字状の補強部12dで連結されている。このためスリット12cの箇所で過度に広がることが防止されている。
まず、バックサポート5やベース部2を説明する。本実施形態のバックサポート5は、側面視L字状に形成された左右一対のパイプから成るバック支柱17と、該バック支柱17に裏側から着脱可能な支柱カバー18とを備えている。左右のバック支柱17は補強材17aで連結されている。なお、別実施形態として、バックサポート5を樹脂材やアルミ成形品より成る一体成形品とすることも可能である。
また、図16に示すように、座受けシェル11は座受金具10の抱持部27の下方に位置する受け部11aを有しており、受け部11aの先端には堰体11bを上向きに突設している(図15(B)も参照)。従って受け部11aは上向きに開口した樋状になっている。従って、スライド補助体28の外面にグリスを塗布している場合にグリスが滴下しても、このグリスを受け部11aで受けることができる。このため床が汚れることを防止できる。このような構成及び効果は特許文献1~3には全く示唆・教示されていない。
次に、背部の構成を説明する。既述したとおり、バックカバー14には下向きに開口した縦長の長溝40が形成されている。そして、この長溝40は、背もたれ4がロッキングしていないノーマル状態と背もたれ4がロッキングした状態とのいずれの状態においてもバックサポート5で塞がれている。
以上の構成において、ロッキング状態では、座3は全体として前進しつつ第2部分(後部)3bが後傾し、しかも、背もたれ4はその上下中途高さ位置を支点にしてシーソー状に回動しつつ(傾動しつつ)下降するため、着座者はロッキング状態で背もたれ4と座3とで包まれた状態になる。このため快適なロッキング状態を実現できる(基本的な動きの利点は、第2実施形態の説明の後に行う。)。
次に、第2実施形態を説明する。第1実施形態と機能が共通する部分は同じ符号を付している。第1実施形態と同じ機能の部材は基本的には説明を省略している。本実施形態では背もたれ4は背支柱68に取付けられており、背支柱68と背もたれ4との間には、着座者の腰部が当たる部分を前向きに押すランバーサポート8が配置されており、このランバーサポート8は背支柱68で後ろから高さ調節可能に支持されている。
次に、ベース部2と座3との詳細な構造を説明する。まずベース部2の詳細を説明する。例えば図22から理解できるように、ベース本体9の後部内面には補助ブラケット83が溶接されており、ベース本体9と補助ブラケット83に固着されたブッシュ21に脚支柱1の上端を嵌着している。
図22、図23から理解できるように、座受けシェル11は全体として上向きに開口した浅いトレー状の形態になっており、かつ、図18に示すように、後端部は上向きに緩く湾曲しつつ立ち上がった壁状になっている。
図18に示すように、座受けシェル11における第1部分11aの前端寄り部位には、第1中間金具69の天板に手前から嵌合する左右一対のフロント係合爪88が形成されている。また、図19に示すように、第1中間金具69には、フロント係合爪88が左右ずれ不能に嵌まるフロント切欠き部89が形成されている。また、座受けシェル11における第1部分11aの後端部には、第1中間金具69の後端に形成したリア切欠き部90に嵌まるリアストッパー91が形成されている。従って、座受けシェル11の第1部分11aは第1中間金具69に前後左右ずれ不能で上向き抜け不能に保持されている。
次に、従前の図に加えて図26及び図27も参照して背もたれ4とその取り付け構造を説明する。図26に示すように、背支柱68は縦長中心線を挟んだ左右両側に2本配置されており、背支柱68の上端には左右横長の上部材102が固着されており、上部材102に背板15が固定されている。図27(A)に示すように、背板15には背支柱68の上部材102に重なる背面リブ103が一体に形成されており、上部材102に背面リブ103を固定している。
図28はロッキング状態での縦断側面図である。概要の欄で述べたように、着座した人が背もたれ4に凭れ掛かると、背もたれ4は第2ピン71を中心にして後傾するが、第2ピン71が前進するため、背もたれ4はその上下略中間部を中心にして後傾しつつ全体的に下降し、かつ、座3は全体として前進しつつ第2部分3bは後傾する。
上記の各実施形態は本願発明のほんの一例であり、本願発明は上記の実施形態の他にも様々に具体化できる。例えば必ずしも座受けシェルは必要ないのであり、例えば座板を直接に座受金具(中間金具)に取り付けることも可能である。
2 ベース部
3 座
3a 座の第1部分
3b 座の第2部分
4 背もたれ
5 バックサポート
9 ベース本体
10 座受金具
11 座受けシェル(座アウターシェル)
12 座板(座インナーシェル)
12a 座板の第1部分
12b 座板の第2部分
13 座クッション体
14 バックカバー(背アウターシェル)
11a バックカバーの本体部
11b バックカバーの前向き部
15 背板(背インナーシェル)
16 背クッション体
17 バック支柱
18 支柱カバー
25 連結軸
30 ロッキングばね
40 バックカバー14の長溝
43 背もたれガイド手段の要素であるガイドピン
45 背もたれガイド手段の要素であるガイド部材
69 第1中間金具
72 第2中間金具
Claims (9)
- 人が腰掛ける座と、着座した人が凭れ掛かる背もたれと、前記座及び背もたれを支持するベース部とが備えられており、着座した人が前記背もたれに凭れ掛かると、前記座は前進して前記背もたれは上端が後退して下端が前進する状態に後傾する、という構成であって、
前記座は、その前端が含まれる第1部分と後端が含まれる第2部分とを備えており、前記第2部分は第1部分に対して側面視で後傾可能である一方、前記背もたれは後傾しつつ下降するように背もたれガイド手段で支持されており、前記座の第2部分と背もたれとは、背もたれが下降動すると座の第2部分が後傾動するように連結されており、このため、着座した人が背もたれに凭れ掛かると前記背もたれは全体として後傾しつつ下降して座は全体として前進しつつ第2部分が後傾する、
ロッキング椅子。 - 前記背もたれは、背板とその前面に張ったクッション材とを備えており、前記背もたれガイド手段は、前記ベース部に固定されていて前記背板の裏側に立ち上がったバック支柱を有しており、前記バック支柱の上端は前記背板の上端と下端との間の高さに位置しており、前記バック支柱の上端部には、前記背もたれを下降しつつ後傾するように支持するガイド部が設けられている、
請求項1に記載したロッキング椅子。 - 前記背もたれは前記背板の後ろに配置したバックカバーを有しており、前記バックカバーは下降しつつ傾動するように前記バック支柱に連結されている一方、前記背板は、着座者の体圧で変形し得る状態で前記バックカバーに取り付けられており、かつ、前記バックカバーと前記座の第2部分とは一緒に動くように連結されている、
請求項2に記載したロッキング椅子。 - 前記バック支柱は背もたれの左右中間部に配置されている一方、前記バックカバーの左右中間部には、前記バック支柱が嵌まる下向き開口の長溝が空いており、前記バックカバーとバック支柱とに、前記背もたれの後傾に関係なく前記ガイド部を覆うカバー手段が設けられている、
請求項3に記載したロッキング椅子。 - 前記バック支柱は金属製であり、前記バック支柱の上端部には前記背もたれガイド手段の要素として左右横長のガイドピンを設けている一方、前記バックカバーのうち前記長溝の内側面には、同じく前記背もたれガイド手段の要素として前記ガイドピンがスライド自在に嵌まる上下長手のガイド溝が設けられており、前記バック支柱には前記バックカバーの長溝を塞ぐ支柱カバーが装着されており、前記支柱カバーの上端部を前記バックカバーの内部に配置することにより、背もたれの後傾に関係なく背もたれガイド手段が後ろからカバリングされている、
請求項4に記載したロッキング椅子。 - 前記座の第1部分はその下方に配置した座受けシェルに取付けられており、前記座受けシェルは前記ベース部に前後動自在に取付けられている一方、前記バックカバーは前記座における第2部分の下方に延びる前向き部を有しており、前記座の第2部分と前記バックカバーの前向き部とを相対動可能に連結しており、かつ、前記座受けシェルの後端縁と前記バックカバーにおける前向き部の前端縁とは、人が指を挿入不能な状態で上下に重なり合っている、
請求項3~5のうちのいずれかに記載したロッキング椅子。 - 前記背もたれは、当該背もたれの上下略中間部かこれに近い高さ領域を支点にして後傾しつつ下降動するようにバック支柱に連結されている、
請求項2~5のうちのいずれかに記載したロッキング椅子。 - 前記座は樹脂製の座板とその上面に張ったクッション材とを備えており、前記座板にヒンジ部を形成して屈曲可能とするか又は前後に分割して屈曲可能に連結することにより、前記第1部分と第2部分とを構成している、
請求項1~5のうちのいずれかに記載したロッキング椅子。 - 前記座の第1部分はベース部に前後動自在に連結された第1中間金具に取り付けられている一方、前記座の第2部分は、前記第1中間金具に後傾動可能に連結された第2中間金具に取り付けられており、前記第2金具に固定された背支柱に前記背もたれを取り付けている、
請求項1又は2に記載したロッキング椅子。
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2009
- 2009-10-26 JP JP2009245006A patent/JP5514509B2/ja active Active
- 2009-11-30 EP EP09850877A patent/EP2494887A4/en not_active Withdrawn
- 2009-11-30 CN CN200980162162.2A patent/CN102595972B/zh not_active Expired - Fee Related
- 2009-11-30 CA CA2779060A patent/CA2779060A1/en not_active Abandoned
- 2009-11-30 US US13/503,943 patent/US8752896B2/en not_active Expired - Fee Related
- 2009-11-30 WO PCT/JP2009/070128 patent/WO2011052099A1/ja active Application Filing
- 2009-11-30 KR KR1020127010673A patent/KR20120079118A/ko not_active Application Discontinuation
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JP2004033444A (ja) * | 2002-07-03 | 2004-02-05 | Kokuyo Co Ltd | 椅子 |
JP2006526484A (ja) * | 2002-09-12 | 2006-11-24 | スチールケース デベロップメント コーポレイション | 快適表面を備える座席 |
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Title |
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See also references of EP2494887A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN102595972A (zh) | 2012-07-18 |
EP2494887A4 (en) | 2013-03-13 |
EP2494887A1 (en) | 2012-09-05 |
US8752896B2 (en) | 2014-06-17 |
JP5514509B2 (ja) | 2014-06-04 |
CA2779060A1 (en) | 2011-05-05 |
JP2011087832A (ja) | 2011-05-06 |
KR20120079118A (ko) | 2012-07-11 |
CN102595972B (zh) | 2015-12-02 |
US20120205952A1 (en) | 2012-08-16 |
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