CN103799731A - Chair - Google Patents

Abstract

The invention provides a chair, which has a chair seat and a backrest, and an appropriate structure for improving integral rigidity. The chair (C) comprises a crossarm piece (15) disposed at the upper end parts of rear legs (12) at the left and right sides, and a backrest (3) supported by the crossarm piece (15) and a chair seat (2) supported by the crossarm piece (15). The integral rigidity can be improved through arranging the crossarm piece (15) between the upper end parts of rear legs (12) at the left and right sides.

Description

Chair

Technical field

The present invention relates to be suitable for the chair of school's use or office use etc.

Background technology

In the past, in this chair, on the known supporter that forms main body at metal tube, be supported with the chair (for example, with reference to patent documentation 1) that backrest and seat support form.

But seat support and backrest are installed on the different parts of supporter explicitly in this chair.Therefore, for guarantee supporter intensity while by seat support and back rest supports in this supporter, therefore the structure of supporter is easily complicated.

Patent documentation 1: TOHKEMY 2011-244960 communique

Summary of the invention

The present invention is conceived to above such thing and completes, and its object is to provide the chair that possesses seat support and backrest and can suppress the structure complicated that supports seat support and backrest.

, chair of the present invention is structure below.

The chair of recording in technical scheme 1, possesses: be set up in crossarm member between the upper end of back leg of left and right, be supported on the backrest of this crossarm member and be supported on the seat support of described crossarm member.

The chair of recording in technical scheme 2, in the structure described in technical scheme 1: possess from described crossarm member upward outstanding arrange support portion and from the described crossarm member outstanding lower support portion arranging downwards, described backrest is installed on described upper support portion and described seat support can be installed on described lower support portion rotationally.

The chair of recording in technical scheme 3, in the structure described in technical scheme 1 or 2: the lower cover that possesses the upper cover of the upside that covers described crossarm member and the downside of the described crossarm member of covering.

The chair of recording in technical scheme 4, in the structure described in technical scheme 1,2 or 3: be the two end portions of the bar-shaped described crossarm member of rib, be connected in this back leg by welding under the state being positioned in the depressed part arranging in the upper end of described left and right back leg.

The chair of recording in technical scheme 5, in the structure described in technical scheme 1,2,3 or 4: back leg and described crossarm member by described left and right form backsight frame structure in shaped door.

The chair of recording in technical scheme 6, in technical scheme 1, 2, 3, in structure described in 4 or 5: it is bar-shaped that described crossarm member is four ribs, this two end portions that is the bar-shaped crossarm member of four ribs is connected in this back leg by welding under the state that is positioned the depressed part arranging in the upper end of the back leg of described left and right in a tubular form, described seat support possesses the upper cover of the upside that covers described crossarm member, described upper cover has flat lid body and gives prominence to from this lid body the lid installation portion arranging downwards, be configured to that described lid installation portion is inserted into the gap between described left and right back leg and described crossarm member and elasticity is sticked in described crossarm member.

According to the present invention who has illustrated, can provide the chair that possesses seat support and backrest and can suppress the structure complicated that supports seat support and backrest above.

Accompanying drawing explanation

Fig. 1 is the stereogram that represents an embodiment of the invention.

Fig. 2 is the side view in this embodiment.

Fig. 3 is the front view in this embodiment.

Fig. 4 is the rearview in this embodiment.

Fig. 5 is the exploded perspective view in this embodiment.

Fig. 6 is the stereogram that represents back cushion and backrest.

Fig. 7 is the exploded perspective for arrestment mechanism is described.

Fig. 8 is the exploded perspective view in this embodiment.

Fig. 9 is for backrest and the handrail general profile chart with respect to the installation form of installing component is described.

Figure 10 is the local amplification rearview in this embodiment.

Figure 11 is the local enlarged front view of backrest.

Description of reference numerals

1: supporter; 2: seat support; 3: backrest;

4: handrail; 5: back cushion (optional body)

12: back leg; 15: crossarm member; C: chair;

T: installing component; Y: pars intermedia; Y1: slotted hole

The specific embodiment

Below, describe with reference to Fig. 1～11 pair an embodiment of the invention.

Present embodiment be apply the present invention to can nested on fore-and-aft direction (nesting) chair C, the i.e. embodiment of the chair C of closed assembly (stacking) in the horizontal direction.As shown in Figure 2, chair C is configured to, and seat support 2 can rotate between use location (U) and the position of upspringing (J), remains under the state of the position of upspringing (J) at seat support 2, can be nested with other chairs that are formed as same structure on fore-and-aft direction.

Chair C is supported with respectively seat support 2, backrest 3 and handrail 4 with respect to supporter 1 and forms, and on backrest 3, can load and unload the back cushion 5 being provided with as optional body.And then, this chair C possesses crossarm member 15 between the upper end of back leg 12 that is set up in left and right, be supported on the backrest 3 of crossarm member 15 and be supported on the seat support 2 of crossarm member 15, as shown in Figure 4, back leg 12 and crossarm member 15 by left and right, and possess the backsight i.e. frame structure of the コ font of opening downwards in shaped door.Below, be described in detail.

< supporter 1>

Supporter 1 forms take metal parts as main body.Supporter 1 possesses: the foreleg 11 in lower end with the left and right of castor 111; There is the back leg 12 of the left and right of castor 121 in lower end; Connect respectively the side frame 13 of the left and right of the upper end of foreleg 11 of left and right and the mid portion of the back leg of left and right 12; Near front frame 14 upper end of the foreleg 11 about being set up between portion; And be set up in the crossarm member 15 between the upper end of back leg 12 of left and right.In addition, supporter 1 possesses: installing component t, and it more specifically says the carriage of the position at the two ends, left and right that approach the crossarm member 15 being connected with the upper end of the back leg 12 of left and right as the both ends, left and right that are disposed at crossarm member 15; Upper cover e, it covers the upside of crossarm member 15; Lower cover f, it covers the downside of crossarm member 15; With enclosing cover g, it covers the upper outside of the back leg 12 of left and right.

Foreleg 11, back leg 12, side frame 13 and front frame 14, form take metal tube as main body respectively.Foreleg 11 is configured to one with side frame 13 by bending public metal tube, and the rear end of side frame 13 is linked to the position of the top side of ratio mid portion of back leg 12 by rigidity such as welding.The top-joining part 123 of the buffering use of other chair apical graftings that are formed as same structure when nested is installed on the medial surface of back leg 12.Front frame 14 is linked to the foreleg 11 of left and right by rigidity such as welding, the framework top-joining part h1 that is formed at seat support 2 lower surfaces in use location (U) apical grafting in the upper surface of this front frame 14.

Crossarm member 15 is the metal solid bar-shaped parts of four ribs that connected between the upper end of back leg 12 of left and right, is formed as the shape of the slight curvature that mid portion rearward protrudes.Under the state that the two end portions of crossarm member 15 is located in embedding by weld be connected in arrange in the upper end of the back leg 12 of left and right, with the depressed part 122 of the shape depression along crossarm member 15.Depressed part 122 cuts away the upper part of the back leg being formed by pipe fitting 12 to form.Crossarm member 15, possesses backrest the through hole connecting on above-below direction 151 that the bolt v3 of use is inserted through is installed, and possess the screwed hole 152 for lower cover f is installed with respect to crossarm member 15 at length direction central portion and position, 2 of left and right.

Installing component t is metal plate-like part, has by making backrest 3 and handrail 4 direct apical grafting and backrest 3 and handrail 4 are positioned to the function of predetermined position and support respectively the function of backrest 3 and handrail 4 respectively.Installing component t possesses: from crossarm member 15 upward outstanding arrange as support portion t1 backrest installation portion and handrail installation portion; The t3 of lower support portion as seat support installation portion with give prominence to setting downwards from crossarm member 15 is provided with backrest 3 and handrail 4 and on the t3 of lower support portion, seat support 2 can be installed rotationally on upper support portion t1.; installing component t possesses upper support portion t1 and the t3 of lower support portion integratedly; in other words, installing component t by single metal parts one possess be supported on the pars intermedia t2 of crossarm member 15, extend upward from this pars intermedia t2 support portion t1 and the t3 of lower support portion that extends downwards from this pars intermedia t2.

The both ends, left and right that upper support portion t1 is disposed at crossarm member 15 be the back leg that approaches left and right 12 on crossarm member 15 position upside and support backrest 3 and supporting armrests 4.Upper support portion t1 is formed as tabular, upper end be sharp, planar section towards left and right and ora terminalis towards front and back.Upper support portion t1 possesses: the first screwed hole t11, its be threadedly engaged with for the first holding appliance v1 that backrest 3 is installed; With the second screwed hole t12, its be threadedly engaged with for the second holding appliance v2 that handrail 4 is installed.Pars intermedia t2 possesses the square hole t21 that is the quadrangle shape that the bar-shaped crossarm member of four ribs 15 connects.2 installing component t in present embodiment, make crossarm member 15 by the state of square hole t21 under respectively by welding the position, 2 of left and right of being fixed on crossarm member 15.In addition, insert the crossarm member 15 of the shape corresponding with this square hole t21 with respect to square hole t21, then welded and installed parts t and crossarm member 15, so that installing component t becomes easy with respect to the location of frame part 15.The both ends, left and right that the t3 of lower support portion is disposed at crossarm member 15 be the back leg that approaches left and right 12 on crossarm member 15 position downside and seat support 2 can be supported rotationally, possess at the coconnected through hole t31 of left and right directions.Through hole t31 is circular hole, and axle supports seat support 3.

In addition, at the t3 of lower support portion and be supported between the seat support 2 of the t3 of lower support portion, be provided with the arrestment mechanism b for making seat support 2 rotate under the state that maintains certain frictional force, details aftermentioned.

Upper cover e covers the upside of crossarm member 15, possesses flat lid body e1 and gives prominence to from this lid body e1 the lid installation portion e2 arranging downwards.

Lid body e1 is disposed under backrest 3, possess the rectangular-shaped window e11 that the upper support portion t1 of installing component t can pass through in the left and right sides, and possess that the columned protuberance x1 of the outstanding lower limb that is arranged at backrest 3 can pass through multiple by hole e12, from peripheral part to the side-prominent e13 of projecting edge portion of lower cover f be formed at the chimeric slot part e14 in top of the front and rear wall x5 of backrest 3 lower ends.

Before and after lid installation portion e2, in pairs, possesses inwardly outstanding pawl e21 on top.Lid installation portion e2, is configured to the gap a between back leg 12 and the crossarm member 15 that is inserted into left and right and the front and back of crossarm member 15 is clipped in interior and is engaged with crossarm member 15 elasticity respectively to the side-prominent setting of crossarm member 15 from the two end portions of lid body e1.

Lower cover f possesses: cover the front-back of crossarm member 15 and the crossarm member cap f1 of lower surface; With the back leg cap f2 that form continuously, that cover the inner side of the upper part back leg 12 from the two ends of crossarm member cap f1.

Crossarm member cap f1 possesses: the antetheca f11 and the rear wall f12 that cover the front-back of crossarm member 15; With the diapire f13 of lower surface that covers crossarm member 15.On front and rear wall f11, f12, possess: recess f111, f121 that the e13 of projecting edge portion of upper cover e enters; With for assisting installation and guide plate f112, the f122 recess f111, f121 disposed adjacent to these recesses f111, f121.Guide plate f112, f122, easily carry out the e13 of projecting edge portion of upper cover e to embed the recess f111 of lower cover f, the operation of f121 across certain intervals ground arranged spaced with respect to front and rear wall f11, f12.Diapire f13 possesses: the rectangular-shaped window f131 that the t3 of lower support portion of installing component t can pass through; Insert the hole f132 of use with the screw that the screw v4 of the lower surface for lower cover f being installed on to crossarm member 15 is inserted through.

Back leg cap f2 forms along the shape of the back leg 12 of left and right in a tubular form, by the protuberance f21 with the screw insertion hole f211 from inner surface to back leg 12 side-prominent settings is embedded the installing hole 124 that is formed at back leg 12 and positioned.

The enclosing cover g of left and right covers near the outside, upper end of the back leg 12 of left and right, is formed as along the shape of the back leg 12 of left and right.Enclosing cover g is to the side-prominent protuberance g1 with screw hole g11 that is provided with of back leg 12, and the installing hole 124 that is formed at back leg 12 by protuberance g1 embedding positions.

< seat support 2>

Seat support 2 can rotate the t3 of lower support portion that is supported on installing component t.Seat support 2 possesses seat support body 21 and is disposed at the buffer part 22 on this seat body 21.Chair seat support body 21 possesses: the inner casing 211 being formed by resin; Formed by resin, add and be arranged at the shell 212 in inner casing 211 outsides; Be installed on the metal support arm 213 of this shell 212; Be disposed under this support arm 213, this support arm 213 of overlay masking and be installed on the lower cover 214 of the left and right of shell 212.

Inner casing 211 is disposed on shell 212, is formed as the disk shape that middle body caves in slightly downwards.Inner casing 211, its top ends is formed as sagging shape downwards, and end is formed as circular-arc shape thereafter.

Shell 212 possesses: be arranged at the framework top-joining part h1 that the front frame 14 of lower surface, supporter 1 can apical grafting; Give prominence to upward the left and right protuberance h2 arranging from two ends, rear portion; With the bolt by not shown, the not shown support arm installation portion of the cardinal extremity part of support arm 213 is installed.Left and right protuberance h2 possesses at head portion the slit h21 that the t3 of lower support portion of installing component t can insert.

Support arm 213 bends metallic plates and forms, and head portion is articulated in the t3 of lower support portion of installing component t, and cardinal extremity part is installed on the not shown support arm installation portion of shell 212 by bolt.The tip side of support arm 213 is disposed in the protuberance h2 of shell 212.Support arm 213 possesses the square shaft j of outstanding rectangle column to the inside with screwed hole j1.

Buffer part 22 is the common parts that are provided with tensioning material in the outer surface tensioning of sponge material with resiliency.Buffer part 22 is positioned on inner casing 211, with inner casing 211 similarly top ends be formed as sagging shape downwards and rearward end is formed as circular-arc shape.In addition, the tensioning material of buffer part 22 is included in the peripheral part of the inner casing 211 of the lower surface interpolation setting of buffer part 22, ties up and is integrated with rope.Between the seat support 2 and supporter 1 that possess buffer part 22, possesses the arrestment mechanism b for making seat support 2 rotate with respect to supporter 1 under the state that maintains certain frictional force.

Arrestment mechanism b as shown in Figure 7, possesses: support arm 213; Resinous the first brake component b1, it has the circular hole b11 being inserted by the square shaft j of this support arm 213, adds and is arranged at support arm 213; The t3 of lower support portion, it has the through hole t31 of the circular hole of being inserted by square shaft j, adds and is arranged at the first brake component b1; Resinous the second brake component b2, it has the circular hole b21 being inserted by square shaft j, adds and is arranged at the t3 of lower support portion; Metal swivel plate b3, it has the roughly square hole b31 of consistent size of size being formed as with inserted square shaft j, adds and is arranged at the second brake component b2; With screw b4, it has to add and is arranged at the head of screw b41 of this swivel plate b3, is threadedly engaged with the screwed hole j1 of square shaft j.

In the time that the support arm 213 of seat support 2 rotates with respect to the t3 of lower support portion of supporter 1, state and support arm 213 and the lower support portion t3 sliding-contact of the first brake component b1 rotating with respect to square shaft j, and state and lower support portion t3 and the swivel plate b3 sliding-contact of the second brake component b2 rotating with respect to square shaft j, brings into play certain brake force.On the other hand, threadingly engage in square shaft j screw b4 head of screw b41 apical grafting in the swivel plate b3 of square shaft j one rotation, rotate so forbidden that screw b4 is relative with swivel plate b3, suppressed the rotation that screw b4 is accompanied by seat support 2 and operated and lax situation.Brake force can be that fastening degree regulates by the degree that is threadedly engaged with of screw b4.

In addition, as shown in Figure 2, the gauge that seat support 2 is set as rear side is thicker than front side.Therefore, be configured in the chair C that seat support 2 can rotate between use location (U) and the position of upspringing (J), can make the part corresponding with the person's of taking a seat seating position is the rear strength excellence of seat support 2.Therefore, can provide the control sense of feeling at ease while helping take a seat to the person of taking a seat.And then, by the gauge of such setting seat support 2, the design freedom of the thick grade of Thickness Ratio toe lateral that has improved the rear portion side that makes buffer part 22 for taking a seat of the person of taking a seat felt good.

Near the back edge of seat support 2, the gauge of part is set thicklyer than the front side of seat support 2, is positioned at and approaches backrest 3 one sides.So, be designed to, in the case of by the chair C shown in present embodiment from rear is nested with respect to other chairs that are formed as same shape, part can not contact the lower edge of the upper cover e of covering crossarm member 15 and/or the circumference x of backrest 3 of other chairs C near the back edge of seat support 2.By like this, avoid parts be accompanied by each other nested and contact, produce the situation of damage etc., contribute to smooth and easy and carry out efficiently nested.

The both ends, left and right that installing component t is positioned at crossarm member 15 i.e. the position slightly in the inner part from the position of the back leg 12 of left and right.And the seat support 2 that can be installed on rotationally the ratio crossarm member 15 downward outstanding parts on installing component t is draped and is supported in the downside of crossarm member 15.More particularly, seat support 2 is articulated in to the lower t3 of support sector of the lower side-prominent setting of crossarm member 15.

< backrest 3>

Backrest 3 is the resinous parts with multiple slotted hole y1, overlooks and is formed as the bending shape that central portion rearward bloats, and side-looking is formed as the bending く word shape that near middle body bottom forwards protrudes.In the present embodiment, backrest 3 is configured to be loaded on the crossarm member 15 of supporter 1.Backrest 3 possesses circumference x and is formed with the pars intermedia y of slotted hole y1 by this circumference x encirclement.

Circumference x, around the pars intermedia y that is formed as shape of a mesh, is formed as gauge along with increasing downward.Circumference x possesses: multiple protuberance x1, and it is formed at lower edge, outstanding downwards across interval; Hole x2, the both ends that it is arranged at lower edge, the support portion t1 that is mounted parts t inserts; Back of the body top-joining part x3, it is made up of the wall x22 that forms this hole x2, locates with the direct apical grafting of upper support portion t1; Depressed part x4, it is formed at the bottom at side edge, open laterally; With front and rear wall x5, it is to be formed at front side and the rear side of the lower end of backrest 3 in the upwardly extending mode of right and left.The top of this front and rear wall x5 is embedded in the slot part e14 of upper cover e.

Protuberance x1 is formed as cylindric, and what be configured to that top can be at upper cover e passes through hole e2 by adding the upper surface that is arranged at crossarm member 15.On the protuberance x1 that is disposed at middle and the left and right sides within these multiple protuberance x1, be formed with bolt hole x11, the bolt v3 that use is installed by the backrest being inserted through from the lower face side of crossarm member 15 installs with respect to crossarm member 15.

Installing component t is positioned at the both ends, left and right of crossarm member 15, the i.e. position slightly in the inner part from the position of the back leg 12 of left and right.And the backrest 3 that is installed on the part that the ratio crossarm member 15 in installing component t projects upwards is from being inserted on installing component t with the position of crossarm member 15 apical graftings so that it is loaded on crossarm member 15.More particularly, in the present embodiment, backrest 3 is moved and by the inside of the upper support portion t1 patchhole x2 of installing component t and make lower limb and upper cover e apical grafting, so that backrest 3 is loaded in covering on the upper cover e of crossarm member 15 downwards.

X2 lower end, hole has peristome k, forms by inwall x21, outer wall x22 and front and rear wall x23, x24 the space that upper support portion t1 is inserted into.

Back of the body top-joining part x3 forms take the outer wall x22 that forms hole x2 as main body, the through hole x31 connecting on left and right directions that the projection 422 that is provided with handrail top-joining part 42 at upper and lower 2 positions can be passed through, and on these through holes x31, be provided with that the first holding appliance v1 passes through pass through hole x32.

Depressed part x4 laterally canyon topography is formed in the bottom at the left and right sides edge of circumference x, possesses front and rear wall x41, x42 and has connected the diapire x43 between this front and rear wall x41, x42, and diapire x43 is formed by the outer wall x22 that forms hole x2.At this depressed part x4, to there is the handrail top-joining part 42 of state configuration handrail 4 described later of predetermined gap s., handrail 4 with the state configuration that do not contact with backrest 3 in depressed part x4.In addition, depressed part x4 be not installed on handrail 4 under the state of supporter 1, is sealed by backrest lateral edges lid (not shown).

The back of the body top-joining part x3 of backrest 3 is installed with respect to the upper support portion t1 in patchhole x2 by the first holding appliance v1 passing through in by hole x32.In addition, the handrail top-joining part 42 of handrail 4 described later is installed with respect to the upper support portion t1 in patchhole x2 by the second holding appliance v2 different from the first holding appliance v1.

Pars intermedia y is synthetic resin system, possess multiple slotted hole row yf, described slotted hole row yf be left and right position consistency be arranged above and below and multiplely form at the upwardly extending slotted hole y1 of upper and lower, be formed as arranging the resin web lattice structure that multiple slotted hole row yf form on left and right directions spaced apartly.The pars intermedia y that forms resin web lattice structure is formed as roughly the same gauge.The adjacent each slotted hole row yf in left and right each other, with the size suitable with the half of the slotted hole arrangement pitches of above-below direction up and down relative dislocation arrange, except edge, the left and right sides, in the both sides of each slotted hole row yf, dispose respectively the plastic filament sj of spire regularly.The upper rim of circumference x and lower limb part connect as one by these many filament sj.

In backrest 3, circumference x is formed as gauge along with increasing downward, and pars intermedia y is formed as roughly the same gauge, so be formed with sunk part in the bottom of the rear side of backrest 3 by circumference x and pars intermedia y.That is, circumference x is set to more downwards thickening more gradually, pars intermedia y be set to circumference x be formed as above same plane.

Below, with reference to Figure 11, the pars intermedia y of backrest is more described in detail.

Slotted hole y1 extends up and down, possesses: the wide width part y11 with the wide part y111 extending in the longitudinal direction; With continuous and roughly wide the narrow width part y12 extending up and down, in the longitudinal direction that is formed at this wide width part y11.Wide width part y11 possesses: the wide part y111 extending up and down, and be formed as width dimensions from the upper and lower end parts of this wide part y111, narrow gradually, with the continuous part y112 in a narrow margin gradually of narrow width part y12.

Pars intermedia y a slotted hole y1 and by upper-lower position dislocation be arranged between other the slotted hole y1 ' (with reference to Figure 11) on side of this slotted hole and possess the first tape member y2, the straight line band y22 of portion that described the first tape member y2 has the bending to the left and right y21 of curved bel portion and extends up and down respectively from the end of the y21 of this curved bel portion.In addition, at pars intermedia y, the upper and lower multiple slotted hole y1 that form possess and are formed as the second banded tape member y3 spaced apartly between these slotted holes y1.The first tape member y2 and the second tape member y3 are set to same gauge.So, pars intermedia y possesses the filament sj that multiple the first tape member y2 are linked up and down in the both sides of multiple slotted hole y1.Pars intermedia y is formed as eyed structure by filament sj and the filament sj that links other adjacent with this filament sj the second tape member y3 each other.

In this embodiment, by the second tape member y3 be connected in 4 straight line band y22 of portion of this second tape member y3, form to overlook and be roughly H word shape, bear the top-joining part at of the person's of taking a seat load.This top-joining part at plays the function of actively bearing the person's of taking a seat load, provides the sense of feeling at ease while taking a seat to the person of taking a seat.

In addition, in this embodiment, the top-joining part at and/or the eyed structure that are made up of first, second tape member y2, y3 are slowly continuous, form backrest 3 curved surfaces and/or backrest 3 planes.Therefore, backrest 3 is followed the person's of taking a seat back and is caused suitably strain, can provide good comfort to the person of taking a seat, and provides the sense of feeling at ease while taking a seat to the person of taking a seat.

Each filament sj connects as one multiple the first tape member y2 to form on above-below direction.The adjacent filament sj in left and right is connected and is formed eyed structure by described multiple the second tape member y3.

Near each the second tape member y3, the filament sj of the left and right being formed by connecting by the second tape member y3 with by this second tape member y3 is being dispersed with and is overlooking the multiple top-joining part at that are formed as H shape with the spacing of being scheduled to up and down.

The backrest 3 with above structure possesses: the wide width part y11 with wide part y111; With adjacent with this wide width part y11 and be formed as waiting the narrow width part y12 of width with the width dimensions narrower than this wide part y111, so in the situation that observing backrest 3 from front, can be by the rear portion of slotted hole y1 identification chair C (for example, with reference to Fig. 3 and Fig. 4), on the other hand at a certain angle from oblique observation backrest 3 in the situation that, only narrow width part y12 blocks the light from chair C rear portion, can be by narrow width part y12 identification chair C rear portion (for example,, with reference to Fig. 5 and Fig. 6)., angle, finding change the backrest 3 of present embodiment according to the observation.More particularly, the backrest 3 of present embodiment, by changing viewing angle, can be taked by the wide width part y11 structure adjacent with narrow width part y12: the identification state that can recognize by the wide width part y11 of slotted hole 1 and narrow width part y12 both sides chair C rear portion selectively; With can recognize chair C rear portion and can not be from the part identification state at narrow width part y12 identification chair C rear portion by the wide width part y11 of slotted hole y1.

< handrail 4>

Handrail 4 possesses the handrail body 41 with elbow contact site 411 and the handrail top-joining part 42 that is disposed at the cardinal extremity of this handrail body 41, forms as one by resin.Handrail body 41 is extended forwards, backwards, and the edge part of tip side is made as the shape with fillet, and base end side is connected with the handrail top-joining part 42 of upper downward-extension.Handrail top-joining part 42, as shown in summary in Fig. 9, is looked the overlapping state configuration in left and right in the back of the body top-joining part x3 of backrest 3 with main, with the direct apical grafting of upper support portion t1.Specifically, handrail top-joining part 42 possesses: the tabular handrail top-joining part body 421 that upper end is sharp-pointed; With the projection 422 from this handrail top-joining part body 421 to the side-prominent setting of backrest 3, by through hole x31 with support portion t1 apical grafting, this projection 422 is directly located with upper support portion t1 apical grafting., the handrail 4 of present embodiment is supported with respect to the upper support portion t1 immediate roof ground connection of supporter 1.On handrail top-joining part 42, be formed with at 2 positions the bolt wearing on left and right directions accordingly with projection 422 and insert the through hole 423 of use, under the state of Yu Shang support portion, top t1 apical grafting that makes projection 422, be mounted with respect to upper support portion t1 by the second holding appliance v2.Handrail 4 is mounted to the direct apical grafting with respect to upper support portion t1, so handrail 4 can be installed on to the position of expection.

< back cushion 5>

Back cushion 5 is installed to such an extent that can be that the resinous backrest 3 of slotted hole y1 loads and unloads with respect to have multiple holes at pars intermedia y.Back cushion 5 is for giving resiliency to the person of taking a seat.

Back cushion 5 possesses: the back cushion body 51 that covers the front face side of backrest 3; What be sticked in slotted hole y1 by sliding with respect to backrest 3 angles the portion of connecing 52; With this angle the portion of connecing 52 be sticked in slotted hole y1 stage, be sticked in from different other slotted holes y1 of the slotted hole y1 that angles the portion of connecing 52 to engage and prevent the anti-stop element 53 that returns returning.

The slotted hole y1 that is formed at backrest 3 possesses can insert upper and lower, the narrow width part y12 with the width space narrower than wide width part y11 that angle the wide width part y11 of the portion of connecing 52 and be formed at this wide width part y11, is configured to and angles the portion of connecing 52 to be sticked in narrow width part y12.

Back cushion body 51 has from the area of the pars intermedia x of front side overlay masking backrest 3, possesses: be formed as sheet material 511 tabular, that interpolation is arranged at backrest 3; Be installed on the bolster 512 of this sheet material 511 with one.In the present embodiment, from sheet material 511 below respectively outstanding being provided with angle the portion of connecing 52 and return to anti-stop element 53, these sheet materials 511, angle the portion of connecing 52 and return to anti-stop element 53 and be integrated by ester moulding.The bolster 512 of back cushion body 51 on the outer surface tensioning is provided with tensioning material.

Angle the portion of connecing 52 rearward outstanding from back cushion body 51, possess: cardinal extremity is connected in the projecting part 521 of the quadrangular shape that back cushion body 51 forms; The disc-shaped head parts 522 of using with the slip-off preventing that is arranged at these projecting part 521 tops.Projecting part 521 is formed as left and right width than narrow tabular of upper and lower width, and left and right width is roughly consistent with the width dimensions of narrow width part y12.The two sides of projecting part 521 and lower surface are sticked in respectively the straight line band y22 of portion and the second tape member y3 of the narrow width part y12 of the downside that forms wide width part y11.Head member 522 has the left and right width dimensions larger than the width dimensions of narrow width part y12.Head member 522 is set to the size of separation of back cushion body 51, with the gauge of the pars intermedia y of backrest 3 be that the gauge of the straight line band y22 of portion and the second tape member y3 is roughly the same.In other words, projecting part 521 be limited under the state that is installed in backrest 3, the movement of to the left and right direction relative with backrest 3 and the movement of restriction downward direction move left and right limiting unit, head member 522 be the restriction forwards, backwards direction relative with backrest 3 movement move forward and backward limiting unit.

Return to anti-stop element 53 for by the stage around the narrow width part y12 that makes to angle the portion of connecing 52 to slide, make to angle the portion of connecing 52 to be sticked in slotted hole y1 after angling the portion of connecing 52 to be inserted through the wide width part y11 of slotted hole y1 downwards, be sticked in slotted hole y1 and prevent from returning upward.Return to anti-stop element 53 and be formed as excrescence, arrange from back cushion body 51 is outstanding, angling the portion of connecing 52 to be sticked in the stage around narrow width part y12, be inserted through in the wide width part y11 of slotted hole y1, embed wide width part y11.

, returning to anti-stop element 53 possesses: cardinal extremity is connected in the first tabular protuberance 531 of lengthwise of back cushion body 51; That extends to the left and right from the top of this protuberance 531 tabular returns to anti-stop 532; Be connected to columned second protuberance 533 of the end of protuberance 531 with being disposed at the two ends up and down of protuberance 531.Return to the first protuberance 531 of anti-stop element 53 and return to anti-stop 532 by forming, forming the sharp-pointed arrowhead form in top.That is, return anti-stop 532 have guiding use inclined plane 532a, be formed as at the wide width part y11 to slotted hole y1 by the fashionable shape that it is easily passed through.On the other hand, return to anti-stop 532 and possess in end to angle and meet the 532b of portion, after wide width part y11, angle the portion 532b of connecing to be sticked in the surrounding of wide width part y11 and performance prevents the function coming off.The second protuberance 533 is being installed under the state of backrest 3, is disposed at the part y112 in a narrow margin gradually of wide width part y11, is the diameter cylindrical shape larger than the width dimensions of narrow width part y12.Return anti-stop element 53 and the anti-stop element that comes off double as in the lump restriction with respect to backrest 3 move up and down move up and down limiting unit.

As described above, the chair C that present embodiment relates to possesses: the crossarm member 15 between the upper end of the back leg 12 about being set up in; Be supported on the backrest 3 of this crossarm member 15; With the seat support 2 that is supported on crossarm member 15, so support explicitly seat support 2 and backrest 3 with crossarm member 15, the structure suppressing for supporting seat support 2 and backrest 3 is suitably the structure complicated of supporter 1.And, crossarm member 15 is set up between the upper end of back leg 12 of left and right, so compared with the chair in the past that is linked to backrest etc. with the such as upper part of the left and right of back leg 12, back leg 12 is stable at the position of expection, for making the free degree excellence of the design that the entirety of supporter 1 is firm.

It is bar-shaped that crossarm member 15 is rib, this two end portions that is the bar-shaped crossarm member of rib 15 is connected in this back leg 12 by welding under the state that is positioned the depressed part 122 arranging in the upper end of the back leg 12 of left and right, so crossarm member 15 can be installed on to back leg 12 with the posture of expection.; for example; the upper end of the back leg about the pipe crossarm member being formed by tubing is installed on, for this pipe crossarm member is installed on to the upper end of back leg with the direction of being scheduled to; require suitable notice; but if the chair that present embodiment relates to, just can with comparalive ease crossarm member 15 be installed on to the upper end of back leg 12.And then it is bar-shaped that crossarm member 15 is solid rib, so width dimensions that can be narrow by the tubing than is in the past realized certain intensity, the free degree of design improves.In addition, be the bar-shaped crossarm member of rib 15 by use, can suppress the dislocation to direction of rotation with respect to back leg 12.And then, installing component t is installed being on the bar-shaped crossarm member of rib 15, misplace with respect to crossarm member 15 so also can suppress installing component t.

Metal crossarm member 15 possesses the lower cover f of the upper cover e of the upside that covers crossarm member 15 and the downside of covering crossarm member 15, so thereby can not exposed in outside by upper cover e and lower cover f covering, design excellence.

Possess from crossarm member 15 upward outstanding arrange support portion t1 and from the crossarm member 15 outstanding t3 of lower support portion arranging downwards, support portion t1 on these and the t3 of lower support portion are disposed near the part at the two ends, left and right of crossarm member 15, by from top to bottom backrest 3 being inserted by its with respect on install and seat support 2 can be installed on to the t3 of lower support portion rotationally behind support portion t1 location, so the structure that supports explicitly seat support 2 and backrest 3 with crossarm member 15 is provided.

Back leg 12 and crossarm member 15 by left and right form backsight frame structure in shaped door, so the structure that plays personalized outward appearance and support the excellent rigidity of the back leg 12 of left and right can be provided.

It is bar-shaped that crossarm member 15 is four ribs, this two end portions that is the bar-shaped crossarm member of four ribs 15 is connected in this back leg 12 by welding under the state that is positioned the depressed part 122 arranging in the upper end of the back leg 12 of left and right in a tubular form, possesses the upper cover e of the upside that covers crossarm member 15, described upper cover e has flat lid body e1 and gives prominence to from this lid body e1 the lid installation portion e2 arranging downwards, be configured to cover installation portion e2 be inserted into left and right back leg 12 and crossarm member 15 between gap a in and elasticity is sticked in crossarm member 15, so can utilize in the upper end of the back leg 12 of left and right and be welded with crossarm member 15, be formed with the such structure of gap a, upper cover e is installed with respect to crossarm member 15.

In addition, the embodiment that the present invention has been not limited to describe in detail above.

Chair be not limited to shown in present embodiment can be by seat support at use location and the nested chair between position of upspringing.

Chair can not be also the chair that possesses handrail, can be also the chair that does not possess back cushion.

Crossarm member can be considered various forms, is not limited to the form shown in present embodiment.Crossarm member as long as be set up in left and right upper end between, for example, crossarm member can be also the crossarm member of pole shape, or can be also the bar-shaped crossarm member of rib with polygonal end face more than pentagon.

Possess in the chair of the bar-shaped part of rib at crossarm member, the entirety of crossarm member needn't be all that rib is bar-shaped, bar-shaped as long as the two end portions of the crossarm member being at least connected with the upper end of shank is at least formed as rib.

In addition, crossarm member is not essential for solid, can be hollow yet.

Also can be provided for further carrying the high-intensity framework that the back leg of left and right is bonded to each other with crossarm member split.

Upper support portion and lower support portion are not limited to be integrally formed as installing component like that shown in present embodiment.For example, also upper support portion and lower support portion can be made as respectively to independent parts and independent formation respectively, will fix with respect to crossarm member separately.

Upper support portion and/or lower support portion are not limited to fix with respect to crossarm member by welding like that shown in present embodiment, also can fix by other the method such as screw, also can upper support portion and/or lower support portion be formed as one with respect to crossarm member.

In addition, be also not limited to above-mentioned embodiment for the concrete structure of each several part, can in the scope that does not depart from purport of the present invention, carry out various distortion.

Claims (6)

1. a chair, is characterized in that, possesses:

Crossarm member between the upper end of the back leg about being set up in;

Be supported on the backrest of this crossarm member; With

Be supported on the seat support of described crossarm member.

2. chair according to claim 1, wherein:

Possess from described crossarm member upward outstanding arrange support portion and from the described crossarm member outstanding lower support portion arranging downwards, described backrest is installed on described upper support portion and described seat support can be installed on described lower support portion rotationally.

3. chair according to claim 1, wherein:

Possesses the lower cover of the upper cover of the upside that covers described crossarm member and the downside of the described crossarm member of covering.

4. chair according to claim 1, wherein:

The two end portions that is the bar-shaped described crossarm member of rib under the state that is positioned the depressed part arranging in the upper end of the back leg of described left and right by being welded to connect in this back leg.

5. chair according to claim 1, wherein:

Back leg and described crossarm member by described left and right form backsight frame structure in shaped door.

6. chair according to claim 1, wherein:

It is bar-shaped that described crossarm member is four ribs, this two end portions that is the bar-shaped crossarm member of four ribs under the state that is positioned the depressed part arranging in the upper end of the back leg of described left and right in a tubular form by being welded to connect in this back leg,

Described chair possesses the upper cover of the upside that covers described crossarm member, described upper cover has flat lid body and from this lid body outstanding lid installation portion arranging downwards, is configured to the gap between back leg and the described crossarm member that described lid installation portion is inserted into described left and right and elasticity is sticked in described crossarm member.

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