CN103799738A

CN103799738A - Surface piece of chair

Info

Publication number: CN103799738A
Application number: CN201310016452.4A
Authority: CN
Inventors: 上田伸行; 大木一毅
Original assignee: Kokuyo Furniture Co Ltd
Current assignee: Kokuyo Co Ltd
Priority date: 2012-11-06
Filing date: 2013-01-16
Publication date: 2014-05-21
Also published as: JP6123239B2; JP2014090995A

Abstract

The invention provides a surface piece of a chair, which is capable of easy and reliable covering. The surface pieces (36, 53) of the chair (C) are disposed between first fabric (361a, 535) and second fabric (361b, 536). Sewing protruding parts, ears (363, 537) of position transverse back sides (35e, 52c) are disposed between the first fabric (361a, 535) and the second fabric (361b, 536). Accordingly, ears (363, 537) can be stretched while the surface pieces (36, 53) can be rapidly and correctly mounted.

Description

The epidermis part of chair

Technical field

The present invention relates to backrest face in order to form chair and/or seat support face and cover the epidermis part of the chair of installation.

Background technology

In the past, proposed the seat support bolster of various covering chairs and/or backrest bolster and so on object, can form the epidermis part (for example,, with reference to patent documentation 1) of the suitable chair with regard to sitting face, backrest face.

But epidermis part is in the past the fabric of single kind to be shaped to predetermined form form.Therefore, use thick and heavy fabric if pay attention to appearance looks elegant and/or durability, lack retractility, so overwrite job becomes difficulty.On the other hand, if use the fabric that is rich in retractility, overwrite job becomes easily but can lack design, in addition, if used, easily produces dislocation.

In addition, epidermis part in the past all to stretch indispensably epidermis part edge while carry out overwrite job, so also there is near determination portion position edge of in operation load concentration and easily cause this problem of damage of blank.

Patent documentation 1: No. 4127193 communique of Japanese Patent

Summary of the invention

The present invention is the invention that is conceived to such unfavorable condition, its object be to provide a kind of can be easily and carry out reliably the epidermis part of the chair of overwrite job.

The present invention, in order to reach such object, adopts technical scheme below.

; the epidermis part of chair involved in the present invention; exterior in order to form the seat support of chair and at least one party of backrest, it is characterized in that: the epidermis part of this chair is to make the multiple fabric at the transversal back side via forming to the outstanding bellying stitching of making of outer surface.

Epidermis part if so,, by pinch making bellying while carrying out operation of forming as what is called " ear " in the time that epidermis part is installed, can promptly carry out the position adjustment of epidermis part.Thus, can easily and reliably carry out overwrite job.

By by the exterior epidermis part that forms described backrest, for the back of the body that can support reliably by taking a seat the person of taking a seat on one side make its appropriate tensioning and provide comfort to the person of taking a seat, preferably, carry out moulding on one side, with before described backrest and the back side all encase.

In addition, in order to carry out swimmingly the assembling of backrest by the installation exercise of further promotion epidermis part, preferably, described in make bellying and be configured to transversal described backrest back side medium height position.

And, till lower end spreads all over the exterior of epidermis part that entirety do not have fold, preferably, make bellying described in the back side of transversal described backrest and be formed as the equal shape in bottom of backsight and described backrest in order can easily to realize in the upper end from backrest.

While forming described multiple fabric by the thicker fabric that is difficult to stretch with the fabric that is imbued with retractility in the shape in order easily correctly to follow backrest and/or seat support, as for the described bellying of making is configured to easily hand-held form, the fabric compared with thick that is difficult to stretch described in can enumerating exposes and the form of making bellying described in forming.

In addition, as giving comfortable one of the form of sense that takes a seat by described thicker fabric and the fabric that is imbued with retractility, the thicker fabric that is difficult to stretch described in can enumerating be positioned at described backrest backrest face and described in be imbued with retractility fabric be positioned at the form of the side of described backrest.

At the epidermis part that forms described seat support, as giving comfortable one of the form of sense that takes a seat by described thicker fabric and the fabric that is imbued with retractility, the thicker fabric that is difficult to stretch described in can enumerating be positioned at described seat support with regard to sitting face and described in be imbued with retractility fabric be positioned at the form of the side of described backrest.

And, in order to have the durability of epidermis part and the easiness of installation exercise concurrently, preferably, described in the thicker fabric that is difficult to stretch be yarn fabric system, the fabric that is imbued with retractility is braid system.

According to the present invention, can provide a kind of can be easily and carry out reliably the epidermis part of the chair of overwrite job.

Accompanying drawing explanation

Fig. 1 is the outside drawing of the chair that represents that an embodiment of the invention relate to.

Fig. 2 is the rearview of the chair that relates to of this embodiment.

Fig. 3 is the center side cutaway view of the chair that relates to of this embodiment.

Fig. 4 is the amplification view of wanting portion of Fig. 3.

Fig. 5 is the A-A line cutaway view of Fig. 2.

Fig. 6 is the exploded perspective view of the chair that relates to of this embodiment.

Fig. 7 is the shell of seat support and the exploded perspective view of inner casing of this embodiment.

Fig. 8 is the exploded perspective view of observing from top of the seat support of this embodiment.

Fig. 9 is the exploded perspective view from beneath that the seat support of this embodiment is made as to center.

Figure 10 is the upward view that local omission of the seat support of this embodiment represented.

Figure 11 is the B-B line cutaway view of Figure 10.

Figure 12 is the Action Specification figure representing on the cross section identical with Figure 11.

Figure 13 is that omit and the decomposing rearview of expression the seat support part that this embodiment is related to.

Figure 14 omits the backrest of this embodiment and cover aggregate part and the exploded perspective view from forward observation of expression.

Figure 15 is the exploded perspective view of observing from rear that the backrest of this embodiment is made as to center.

Figure 16 is the exploded perspective view of observing from rear that the backrest of this embodiment is made as to center.

Figure 17 represents the backrest shell of this embodiment and the front view of backrest lower cover.

Figure 18 is the backrest shell of this embodiment and the exploded perspective view of waist support device.

Figure 19 is the rearview of wanting portion that represents the waist support device of this embodiment.

Figure 20 is the key diagram of wanting portion that represents the seat support of this embodiment and the epidermis part at backrest place.

Figure 21 is the related key diagram corresponding with Figure 20 of the variation of this embodiment.

Description of reference numerals

C: chair; 3: seat support; 5: backrest; 36,53: epidermis part;

35a: with regard to sitting face ((bolster) upper surface);

52a: backrest face ((bolster) upper surface);

361a, 535: the 1 fabrics; 361b, 535: the 2 fabrics;

363,537: make bellying (ear); 35e: the back side ((bolster) back side) of seat support; 35d: the side ((bolster) side) of seat support;

52c: the back side ((bolster) back side) of backrest;

52f: the side ((bolster) side) of seat support.

The specific embodiment

Below, use an embodiment of the situation of rotating chair C to applying the present invention to the office of synchronous tilting with reference to accompanying drawing.

This chair C, as shown in Fig. 1～Figure 23, possesses: leg body 1; Be supported on the top of this leg body 1, the support base 2 that can horizontally rotate; Be disposed at the seat support 3 on this support base 2; Can be arranged to hypsokinesis action the back of the body pole 4 of described support base 2; With the backrest 5 that is installed on this back of the body pole 4.

< leg body >

Leg body 1, as shown in Fig. 1～Fig. 6, possesses: the leg pedestal 11 with the leg types of springs of castor 13; With erect in the leg pillar 12 of the central part of this leg pedestal 11.Described leg pillar 12, for gas spring being configured to the common pillar of main body, is provided with described support base 2 in the upper end of this leg pillar 12.

< support base >

Support base 2, as shown in Fig. 1～Fig. 6, Fig. 9 and Figure 15, supports to such an extent that can horizontally rotate and can lifting on above-below direction by described leg body 1, and possesses: the shell 20 that is installed on described leg pillar 12; The main shaft 21 that back rest supports is used, its perforation is installed on this shell 20; Produce mechanism with the not shown reaction force that fascinates, it is paid power and produces elastic reactance with respect to the hypsokinesis action of described backrest 5 to this main shaft 21.The described reaction force that fascinates produces mechanism and is configured to, and can use not shown helical spring and/or gas spring etc. to pay the elastic reactance of direction of rotation to described main shaft 21, but owing to being common mechanism, so description thereof is omitted.

< seat support >

Described seat support 3, as shown in Fig. 1～Figure 13, possesses: shell 31; Inner casing 32, it is disposed on this shell 31 in the mode that can move at front and back upward sliding via sliding guide mechanism 33; Slide locating mechanism 34, its for make this inner casing 32 slide into expectation sliding position and and be locked; Buffer part 35, it is disposed on described inner casing 32; With seat support epidermis part 36, it surrounds the lower surface 326c of the circumference 326 of this buffer part 35 and described inner casing 32.

Described shell 31, as shown in Fig. 2～Fig. 9, Figure 11～Figure 13 and Figure 20～Figure 23, has the load bearing plane P3 that bears the load that comes from the person of taking a seat in upper surface 31c side.Shell 31 is made as different from later half region 31b by the form of upper surface 31c at first half region 31a.Shell 31 possesses: housing main body 311; Vertical rib 312, cross rib 313 and diagonal rib 314, its outstanding upper surface 311a that is arranged at this housing main body 311; With later half central portion 315, it is formed as making near the form that depression forms the central authorities of the described later half region 31b on the lower surface 311b of described housing main body 311, have the encirclement wall 315a side-prominent to the upper surface 311a of described housing main body 311 and by the roof 315c of the jag 315b sealing of this encirclement wall 315a, housing main body 311, vertical rib 312, cross rib 313 and diagonal rib 314 and later half central portion 315 use hard resin and moulding is integrated.At the lower surface 315e of the roof 315c of described later half central portion 315, the outstanding vertical rib 315f and downwards cross rib 315g downwards of being provided with.The upper surface 315d of the roof 315c of

outstanding end face

312a, 313a, 314a and the described later half central portion 315 of described vertical rib 312, cross rib 313 and diagonal rib 314 is configured to, and belongs to 1 public curved surface P2 of imagination.The part that belongs to described first half region 31a of the public curved surface P2 of this imagination, on fore-and-aft direction, each portion roughly keeps certain height, on left and right directions with from the central portion mode bending that rise gradually in both sides of the edge to the left and right.The part that belongs to described later half region 31b of the public curved surface P2 of described imagination, the mode bending that before on fore-and-aft direction, rise gradually in side direction front and other parts roughly keep the mode of certain height to form with each portion, on left and right directions with from the central portion mode bending that rise gradually in both sides of the edge to the left and right.Described load bearing plane P3 is set in the region except periphery of described later half region 31b, is set as belonging to the public curved surface P2 of described imagination.Specifically, this load bearing plane P3 is made up of the upper surface 315d of described roof 315c and

outstanding end face

312a, 313a, the 314a of vertical rib 312, cross rib 313 and diagonal rib 314 of the left and right sides that is disposed at this upper surface 315d.This load bearing plane P3 centered by the seat datum mark S1 that is arranged at described later half region 31b and form, is possessing the sloping portion P31 forwards rising gradually than the position of the forward side of this seat datum mark S1.By this sloping portion P31 is set, can suppresses the person of taking a seat and forwards be offset, and can improve the cooperation sense while taking a seat.In addition, the 1st bar 23 being arranged under this shell 31 is reaction force adjustment use, adjust be arranged in described support base 2 described in the reaction force that fascinates produce the spring predetermined pressure of mechanism.The 2nd bar 24 is for adjusting the height and position of seat support 3, and the not shown line that is connected in this bar 24 is being formed in the recess 312b of described vertical rib 312 and the hole 311c of housing main body 311 by being directed near the upper end of leg pillar 12 of described leg body 1.The 3rd bar 25 is for adjusting the angle of backrest 5, the not shown line that is connected in this bar 25 in being formed at the recess 312c of described vertical rib 312 and being formed at the groove 315h of roof 315c of later half central portion 315 by being directed into the gas spring of not shown backrest angle adjustment use of the downside that is disposed at shell 31.The syndeton of these lines is common structures, so description thereof is omitted.

Described inner casing 32 is as shown in Fig. 3～Figure 12 and Figure 20～Figure 23, possess at the position corresponding with described load bearing plane P3 for making described load bearing plane P3 bear the load transmitting portions 327d of the load that comes from the person of taking a seat, possess: portion possesses the inner casing main body 321 that is shelly of the stage portion 325 that circumference 326 sides uprise near periphery; With the rib 326b of the upper surface 326a of the outstanding circumference 326 that is arranged at this inner casing main body 321, this inner casing main body 321 and rib 326b are integrated by molding synthetic resin that can strain.Described circumference 326 is surrounded by the outer ledge 364 of described seat support epidermis part 36, its outermost edge possess upward extend to upper wall 326d.The region being surrounded by stage portion 325 327 of this inner casing main body 321 forms take following part as main body: first half shell part 327a, and it can be slidably adjacent to

outstanding end face

312a, 313a, the 314a of vertical rib 312, cross rib 313 and the diagonal rib 314 of the first half region 31a of described shell 31; Rear end housing part 327b, it can be slidably adjacent to the upper surface 315d of

outstanding end face

312a, 313a, 314a and the described roof 315c of vertical rib 312, cross rib 313 and the diagonal rib 314 of the later half region 31b of described shell 31; With middle case part 327c, it makes the leading edge of this rear end housing part 327b be connected in smoothly the back edge of described first half shell part 327a.And, be provided with described load transmitting portions 327d at described middle case part 327c.In this rear end housing part 327b, compartment of terrain is set on described middle case part 327c on left and right directions and is formed with the upwardly extending many groove 327g in front and back, under no-load condition, between the lower surface 327e of this load transmitting portions 327d and described load bearing plane P3, be formed with space 327f.This load transmitting portions 327d can be on thickness direction due to the existence of described groove 327g strain with comparalive ease, be configured to the load in the case of having accepted to come from the person of taking a seat strain downwards and with the load bearing plane P3 butt of described shell 31.The load that, comes from the person of taking a seat is finally born by the load bearing plane P3 of described shell 31 via described load transmitting portions 327d.

And this inner casing 32 is configured to move at front and back upward sliding in predetermined scope on described shell 31 via sliding guide mechanism 33, what the interlock that can not be accompanied by described load bearing plane P3 changed this seat support 3 movably takes a seat depth size.That is, mobile by this inner casing 32 is slided with respect to shell 31, what can change seat support 3 takes a seat depth size, but described load bearing plane P3 is arranged at shell 31, so can not move interlock and move with the slip of described inner casing 32.

Described sliding guide mechanism 33, as shown in Fig. 6～Figure 13, possesses: gathering sill 322, and it is formed at multiple positions of described inner casing 32, on fore-and-aft direction, extends; Multiple sliding parts 331, it connects and is installed on these each gathering sills 322 sliding freely respectively, has the anticreep head 332 with the upper surface 32a sliding-contact of described inner casing 32 in upper end; With multiple sliding part installation portion 31e, it is arranged at described shell 31 for fixing the bottom 333 of these each sliding parts 331.If described in detail, described gathering sill 322 is formed at respectively near four bights of described inner casing 32, gives prominence to respectively the rib 323 for head protection that is provided with the anticreep head 332 that surrounds described sliding part 331 around these each gathering sills 322.Described each head protection is set as belonging to the public curved surface P2 of described imagination with the outstanding end face 323a of rib 323.In addition, the upper surface 332a of the anticreep head 332 of described each sliding part 331 tilts in the mode closing in described each head protection rib 323.Described each sliding part 331 is the prism-shaped that can slide along the described gathering sill 322 of correspondence, has not shown screwed hole on lower surface 334.Described each sliding part installation portion 31e is formed at respectively near four bights of described shell 31, is can be from the bottom 333 of top and the described sliding part 331 chimeric basal edge tubular that has.And, on the end 31f of these each sliding part installation portion 31e, be formed with the not shown Screw inserting hole that can Screw 31g be inserted from the lower surface 31d side of described shell 31, by described Screw 31g screw thread is fixed on to described screwed hole 311c, described each sliding part 331 be fixed on to described shell 31.In addition, in Figure 11 and Figure 12, represent sliding part 331 by double dot dash line.

Lead and at the inner casing 32 of front and back upward sliding, can locate and be locked in by described slide locating mechanism 34 sliding position of expectation by the sliding guide mechanism 33 that is said structure.

Described slide locating mechanism 34, as shown in Fig. 6～Figure 13, possesses: functional unit 341, and it can carry out lifting action from lower latched position (D) to upper latched position (U); With the holding section 31r of multiple location use, its slip that is accompanied by inner casing 32 is moved and is corresponding with this functional unit 341 selectively.This slide locating mechanism 34, drop to described lower latched position (D) and be sticked under the state of corresponding holding section 31r, forbid that the slip of described inner casing 32 moves at described functional unit 341, described functional unit 341 rise to described under the state of latched position (U), will remove and allow the slip of described inner casing 32 to move with engaging of described holding section 31r.The operating side 349 of described functional unit 341 is side-prominent to the lower surface 31d of described shell 31, is provided with the bearing surface 31m of the rising of described functional unit 341 latched position (U) engaging on described on described shell 31.Described functional unit 341 is the independently parts that all arrange respectively with described shell 31 and described inner casing 32, and the downward latched position of elastic reactance (D) direction by being disposed in the buffer part 35 on described inner casing 32 is by elastic force-applying.

If described in detail, described functional unit 341 possesses: functional unit main body 343, it can connect the maintaining part 324 that is installed on described inner casing 32 up and down, lower end side by be arranged at described shell 31 forwards, backwards extend groove 31h and side-prominent to the lower surface 31d of this shell 31; Head 344, it is arranged at the upper end of this functional unit main body 343, splices in the lower surface 35b of described buffer part 35 and is lamellar; Lock pawl 345, it is arranged at the mid portion of described functional unit main body 343, is sticked in selectively multiple holding section 31r some that is arranged at described shell 31; Anticreep projection 346, the lower end that it is arranged at described functional unit main body 343, is connected to described bearing surface 31m; With button 347, its mode that supports this anticreep projection 346 to encase is used Screw 348 to be installed on the bottom of described functional unit main body 343, forms described operating side 349.Described bearing surface 31m forms along the openend of the described groove 31h on the lower surface 31d of described shell 31, is configured to the 346a upward of the anticreep projection 346 that can make described functional unit 341 and the 347a upward of button 347 and is connected to this bearing surface 31m and it is slided before and after together with described inner casing 32.In other words, described functional unit 341 is arranged at can be in the position that finger hook is operated under the state of the upper surface side of seat support 3, by maintaining the state of finger hook on seat support 3 while the button 347 of operating operation parts 341, can make the major part of the seat support 3 that comprises this functional unit 341 move with respect to described shell 32, what change seat support 3 takes a seat depth size.; being configured to press...withes one's finger presses the action of described button 347 to become as former state engaging to remove action, can under this engaging disarm state, make the 346a upward of anticreep projection 346 and the 347a upward of button 347 and bearing surface 31m sliding-contact while makes inner casing 32 front and back slips.Making described button 347 and bearing surface 31m butt is prevent irrational effect of stress in each portion and improve the thoughts and feelings of operation for the actuating range of functional unit 341 is kept to certain; Making described button 347 and bearing surface 31m sliding-contact make inner casing 32 front and back slide on one side, is in order to maintain as described above finger hook at the state of the upper surface of seat support 3 while the button 347 of operating operation parts 341 and change takes a seat depth size.

In addition, in the outside of described maintaining part 324 and outside the leading section of described groove 31h, as shown in Fig. 7～Fig. 9, be respectively equipped with

breach

324a, 31k for described anticreep projection 346 is passed through.Be arranged at the breach 324a and the breach 31k in leading section outside that is arranged at described groove 31h in the outside of described maintaining part 324, position in the mode overlapping under the state inner casing 32 has been advanced most, only, under this state, described functional unit 341 can be installed on to described inner casing 32 and shell 31.The inner side of this maintaining part 324 uses rib 323 integrated with the head protection of the gathering sill 322 that is disposed at seat support 3 front left side via linking rib 324b., described maintaining part 324 disposed adjacent are in one of described gathering sill 322.

Described buffer part 35 is as shown in Fig. 3～Fig. 6 and Fig. 8～Figure 12, for being for example pasted with at the lower surface 35b of ingot shape polyurethane the parts that nonwoven forms, carried and be located at the upper surface 32a of described inner casing 32, surrounded by described seat support epidermis part 36 with together with the circumference 326 of described inner casing 32.

Seat support epidermis part 36, as shown in Fig. 1～Fig. 5 and Figure 10～Figure 12, possesses: downwards opening be flat bag-shaped epidermis part main body 361; Be formed at the bagging portion 362 of the edge of opening of this epidermis part main body 361; With the rope 362a that is inserted through this bagging portion 362.Described epidermis part main body 361 is via to the outstanding ear 363 of outer surface, multiple fabric different stretch characteristics (Zhang ground) 361a, 361b being sewed up and formed.Specifically, epidermis part main body 361 is by thicker and be difficult to the 1st fabric 361a that stretches and the 2nd fabric 361b stitching thinner and that be imbued with extensibility forms via ear 363.In addition, as from the different relevant key element of the stretch characteristics of fabric, difference, yarn fabric and the braids etc. of difference, material that can enumerate thickness are structural not equal.Described the 1st fabric 361a is mainly arranged at and forms with regard to the position of sitting face P1, is formed as covering the upper surface 35a of described buffer part 35 and the form of 35c above.The 2nd fabric 361b is arranged at described with regard to the region beyond sitting face P1, is formed as covering the form of side 35d, the back side 35e of described buffer part 35 and the circumference 326 lower surface 326c of inner casing 32.Described bagging portion 362, by tying up the circumference 326 lower surface 326c sides of splicing in described inner casing 32 by described rope 362a, has been installed under the state of shell 31 at this inner casing 32, is incorporated in the gap between this inner casing 32 and shell 31.In addition, described inner casing 32 is due to the existence to upper wall 326d that forms the upwardly extending upper upright wall 325a of described stage portion 325 and be arranged at outermost edge and extend upward, and is formed as along with the form of extending upward towards periphery and gradually from central authorities.In other words, this inner casing 32 is overlooked as square part, by as being that near the shapes that described seat support epidermis part 36 open the described circumference 326 that the seat support of establishing holds part are made as to the interim continuous rising of outermost edge by rope.And the bagging portion 362 of described seat support epidermis part 36 is along the outside configuration of stage portion 325 that is formed with step difference at the lower surface of described inner casing 32, prevent that this bagging portion 362 is outstanding and become the obstacle of the sliding action of this inner casing 32 from the lower surface of inner casing 32.; inside and outside described stage portion 325, at the lower surface of inner casing 32, the mode higher than inner side with outside is formed with step difference; so by configure described bagging portion 362 in the outside of this step difference, can prevent that this bagging portion 362 is side-prominent to shell 31 from the lower surface of inner casing 32.In addition, in Fig. 3～Fig. 5, Figure 11 and Figure 12, represent seat support epidermis part 36 by double dot dash line.

< backrest pole >

Backrest pole 4, as shown in Fig. 3, Fig. 4, Fig. 6, Fig. 9, Figure 15 and Figure 16, possesses: the paired backrest pole main body 41 in left and right of being made by thick steel sheet etc.; The reaction force that fascinates being set up between the base end part 41a of these backrest pole main bodys 41 produces the axle 42 that mechanism uses; The top connecting piece 43 that rigidity between the top of described backrest pole main body 41 is linked; The paired installing plate 44 in left and right extending to the inside from the top ends 41c top edge of described backrest pole main body 41; And be set up between the pars intermedia 41b top edge of described backrest pole main body 41 for forming the rear axle 45 of genlocing mechanism 26, can be installed on rotationally described support base 2 via the main shaft 21 of the axis hole that is inserted through base end part 41a.Be provided with cover at the pars intermedia 41b of described backrest pole main body 41 the hole 41d of use and the projection 41e of cover location use are installed.On described installing plate 44, be equipped with multiple bolt insertion hole 44a, wait and be installed with nut 44b by welding respectively at the lower surface corresponding with these each bolt insertion hole 44a.And the upper surface 44c of this installing plate 44 is formed as the installed surface 44d for described backrest 5 is installed.Between described installing plate 44, be formed with the gap 44e of the top ends of the gas spring for configuring described backrest angle adjustment use.

Described genlocing mechanism 26 is as shown in Fig. 3～Fig. 5, for making seat support 3 and backrest 5 with the action of fascinating of certain angle ratio, via front axle 27, the front of the shell of described seat support 3 31 can be supported in movably forward and backward to the leading section of described support base 2, and via rear axle 45, the rear end side of described shell 31 be supported in to the pars intermedia 41b of backrest pole 4.Front axle 27 can be arranged in the slotted hole 22 arranging at the leading section of described support base 2 slidingly back and forth, and its both ends are held in the front axle maintaining part 31n arranging at the front lower surface of described shell 31.Rear axle 45 is set up in the pars intermedia 41b of described backrest pole 4 as described above, and its both ends are held in the rear axle maintaining part 31p arranging at the rear end side lower surface of described shell 31.

< backrest >

Described backrest 5, as shown in Fig. 1～Fig. 6 and Figure 14～Figure 18, possesses: backboard 51, surround the buffer part 52 of this backboard 51 and be covered in the backrest epidermis part 53 in the outside of this buffer part 52.

Described backboard 51, as shown in Fig. 3～Fig. 5 and Figure 14～Figure 18, possesses: the backrest shell 54 with flexibility; Be installed on the described backrest connector 55 with rigidity of this backrest shell 54; With backrest lower cover 56, its be installed on described backrest shell 54 bottom 54a, there is the antetheca 562 relative with 54e before the bottom 54a of this backrest shell 54, at above between 54e of the back side 564 of antetheca 562 of this backrest lower cover 56 and the bottom 54a of described backrest shell 54, be formed with open incorporating section 57 downwards.

Backrest shell 54, as shown in Fig. 3～Fig. 5 and Figure 14～Figure 18, is formed as the waist 54c corresponding with the person's of taking a seat waist bending and approach 3 dull and stereotyped dimension shapes along with advancing upward significantly, possesses: can strain be tabular shell main body 541; From outstanding multiple vertical rib 542, cross rib 543 and the diagonal rib 544 arranging integratedly of 541f above of this shell main body 541; Be connected and installed portion 545, the form having caved in its back side that is the central lower that makes described shell main body 541, has the encirclement wall 546 side-prominent to the 541f above of described shell main body 541 and by the antetheca 547 of the jag sealing of this encirclement wall 546.And, the projecting height size of described vertical rib 542, cross rib 543 and diagonal rib 544 is set as near the waist 54c central authorities of described backrest shell 54 compared with high and reduce continuously gradually to the periphery of described backrest shell 54, outstanding end face 542a, 543a, the 544a of described each vertical rib 542, cross rib 543 and diagonal rib 544 is configured to and belongs to 1 public curved surface P4 of imagination.Being configured to the public curved surface P4 of described imagination and being positioned at the described antetheca 547 that is connected and installed portion 545 from the same face to 547a above.In addition, at the 541f above of shell main body 541, be integrally formed with bag for keeping the air bag 71 that lumbar support described later uses and nut portions 541a and the described backrest lower cover of use be installed the nut portions 541c of use is installed, the top end face 541b that described bag is installed the nut portions 541a of use belongs to the public curved surface P4 of described imagination.Described shell main body 541, described vertical rib 542, described cross rib 543, described diagonal rib 544, described in be connected and installed portion 545, bag and nut portions 541a and the backrest lower cover of use be installed the nut portions 541c of use is installed, use synthetic resin and moulding is integrated.

Described shell main body 541 is and described 3 dimension shapes bending tabular parts that can strain smoothly accordingly, in both sides of the edge and top edge possess the perisporium 541a forwards giving prominence to certain altitude.The interval of described vertical rib 542 left and right directions each other and the interval of described cross rib 543 above-below direction each other, be set as narrower near described waist 54c central authorities, periphery is wider.On the described cross rib 543 and diagonal rib 544 of described backrest shell 54, local dent is provided with guide part 543b, the 544b for the tracheae 76 that links described air bag 71 and described pump unit 73 is led.

Be connected and installed portion 545 and be the lower limb middle body that to make from the central lower of shell main body 541 be shell main body 541 and form to the area depression of the rectangular shape of backsight of waist 54c middle body, formed by described encirclement wall 546 in shaped door and described antetheca 547 installing space 548 of opening to rear side.Described encirclement wall 546 connects as one with described vertical rib 542, cross rib 543 and diagonal rib 544, in addition, is provided with ribs 547b in the rear side of described antetheca 547.And then, be provided with multiple bolt insertion hole 547c at described antetheca 547, in the front face side of this bolt insertion hole 547c, be formed with the 547d of spot-facing portion for receiving bolt 549 head 549a.

Backrest connector 55 is as shown in Fig. 3～Fig. 6 and Figure 14～Figure 16, be to possess the parts that side-looking that the installation arm 552 that is connected and installed the connector main body 551 of portion 545 described in being flush-mounted in and forwards extend from the bottom of this connector main body 551 forms is L word shape, described installation arm 552 be installed on to the installed surface 44d of described backrest pole 4.Connector main body 551 is the parts of the open flat box-shaped of the front face side of the described installing space 548 of tight embedding, possesses ribs 551a therein.The back side 551b of described connector main body 551 and the back side 54d of described backrest shell 54 are same surface continuously.In addition, this connector main body 551 possesses nut portions 551c in the part corresponding with the bolt insertion hole 547c of the portion that is connected and installed 545 of described backrest shell 54, by being embedded under the state of described installing space 548 at connector main body 551, the bolt 549 that 54e side is inserted by described bolt insertion hole 547c from backrest shell 54 being threadedly engaged with described nut portions 551c, backrest connector 55 is installed on to described backrest shell 54 above.Multiple to dewclaw 551d being formed with above of the bottom of described connector main body 551.

Arm 552 is installed and is extended from the bottom one of described connector main body 551, possess: splice in the paired assembly wall 553 in left and right of the installed surface 44d of described backrest pole 4; By the median wall being integrated 554 connected to each other this two assembly wall 553; With outer ledge from described two assembly walls 553 sagging downwardly depending wall 555 downwards, the position corresponding with the nut 44b of described backrest pole 4 at described two assembly walls 553 is formed with bolt insertion hole 553a, and portion is provided with the square hole 553b that covers installation use near the front end of these assembly walls 553.The upper surface 554a of described median wall 554 is positioned at than the top side's of upper surface 553c of described two assembly walls 553 position.This installation arm 552 is installed on the installed surface 44d of described backrest pole 4 by the bolt 556 being installed on from upside.Specifically, go up so that receive the top ends 4a of backrest pole 4 between the downwardly depending wall 555 of described installation arm 552 by the installed surface 44d that described installation arm 552 is placed in to described backrest pole 4, the bolt 556 of upper surface 552a side inserting bolt inserting hole 553a from described installation arm 552 is threadedly engaged with and the nut 44b of described backrest pole 4, arm 552 is installed thus and is fixed on described backrest pole 4.Like this, described backrest shell 54 is installed on backrest pole 4 via described backrest connector 55.

Described backrest lower cover 56, as shown in Fig. 3～Fig. 6 and Figure 14～Figure 17, possesses: the roof 561 that is installed on 54b before the bottom 54a of described backrest shell 54; With the described antetheca 562 extending from the leading edge of this roof 561, before the back side 564 of described antetheca 562 and the bottom 54a of described backrest shell 54, between 54b, be formed with open incorporating section 57 downwards downwards.So described incorporating section 57 is cut apart by left and right due to the existence of the installation arm 552 of described back of the body connector 55.Described roof 561 possesses the installation projection 563 with Screw hole 563a in its rear rim, by the nut portions 541c that is inserted through the Screw 567 of this Screw hole 563a and the backrest lower cover installation use of described backrest shell 54 is threadedly engaged with, thereby this backrest lower cover 56 is installed on described backrest shell 54.Described antetheca 562 possesses: side has multiple central front wall section 565 to lower claw 565a of bending downwards overleaf; With with the continuous both sides front wall section 566 in the both sides of this central authorities' front wall section 565, at the medial extremity of described both sides front wall section 566, be provided with and connect with the side of the installation arm 552 of described backrest connector 55 or approaching location wall 566a.On before the described backrest shell 54 corresponding with described both sides front wall section 566, be formed with multiple to dewclaw 54f.

Described incorporating section 57 is as shown in Fig. 5 and Figure 15, play as described later the effect of lower ending opening edge part 531a of the described backrest epidermis part 53 of storage, described to lower claw 565a and to

dewclaw

54f, 551d for keeping the lower ending opening edge part 531a of described backrest epidermis part 53.In addition, in a side of the incorporating section 57 of having been cut apart by left and right, be accommodated with as described later the pump unit 73 as the air supply mechanism 72 of the major part of operating mechanism.

Described like this backboard 51 forms take described backrest shell 54, described backrest connector 55 and described backrest lower cover 56 as main body, and this backboard 51 is surrounded by bolster 52 except near the roughly whole position installation arm 552 of described backrest connector 55 and the openend of described incorporating section 57.

Described bolster 52 is as shown in Fig. 3～Fig. 6 and Figure 15, be to make to splice the ingot shape polyurethane 521 of 54e before described backrest shell 54 and splice in the sheet polyurethane 522 of the back side of described backrest shell 54 54d to engage and form near the both sides of the edge of backrest shell 54, be as mentioned above the form of having wrapped whole described backboard 51., this bolster 52 is all wrapped described backrest shell 54 and the connector main body 551 of the described backrest connector 55 that is installed on this backrest shell 54.Described ingot shape polyurethane 521 makes polyurethane foam and manufactures in mould, adds and has nonwoven at its back side.The back shot of this ingot shape polyurethane 521 is corresponding with the public curved surface P2 of imagination of described backrest shell 54, be set as with the outstanding end face 542a of described vertical rib 542, described cross rib 543, described diagonal rib 544,543a, 544a and described in be connected and installed portion 545 to 547a butt above.In addition, near the portion periphery on the back side of this ingot shape polyurethane 521, is formed with the groove 521a of perisporium 541e that accepts described backrest shell 54.Described sheet (slab) polyurethane 522 is cut to needed shape and forms being shaped in advance certain thickness foamed polyurethane raw material, and in Figure 15 and Figure 16, the diagram of this sheet polyurethane 522 is omitted.The outer surface of the bolster 52 forming is like this surrounded by described backrest epidermis part 53.

Described backrest epidermis part 53, as shown in Fig. 1～Fig. 5 and Figure 15, possesses: the banded epidermis part main body 531 in lower end with described lower ending opening edge part 531a; Be sutured in the plastic central engaging parts 532 of the front center part on the lower ending opening edge part 531a of this epidermis part main body 531; The paired plastic both sides, left and right that are sutured in the front side two side portions on described lower ending opening edge part 531a hang stop part 533; With the metal extension principal vertical line material 534 that is held in the rear side on described lower ending opening edge part 531a.In addition, in Fig. 3～Fig. 5, represent backrest epidermis part 53 by double dot dash line.

Specifically, described epidermis part main body 531 is by thicker and be difficult to the 1st fabric 535 that stretches and the 2nd fabric 536 stitchings thinner and that be imbued with extensibility form via ear 537.Described the 1st fabric 535 is formed as mainly covering continuously the form of 52a, the upper surface 52b above of described bolster 52 and the first half 52d of back side 52c.The 2nd fabric 536 is formed as covering the form of the side 52f of described bolster 52 and the latter half 52e of back side 52c.Be positioned at described the 1st fabric 535 and be formed as with the ear 537 on the border of described the 2nd fabric 536 the ridge form that outside face side is outstanding, in the time that this back of the body epidermis part 53 is covered in to described bolster 52, can pinching these ear 537 parts and stretch.Described central authorities extension stop part 532 has observes the top ends 532a that is bent into U-shaped on cross section, and the lower limb that this top ends 532a is hung over to described backboard 51 is the lower limb of the central front wall section 565 of described backrest lower casing 56.The top ends 532a that stop part 532 is hung by described central authorities determines to be held and to be held under state the back side 565b of described central front wall section 565 and described between lower claw 565a hanging.Described both sides extension stop part 533 has observes the top ends 533a that is bent into U-shaped on cross section, and the lower limb that this top ends 533a is hung over to described backboard 51 is the lower limb of the both sides front wall section 566 of described backrest lower cover 56.The mode that described extension principal vertical line material 534 exposes with part is installed on the lower edge portion of described epidermis part main body 531, hangs the lower limb that terminates in described backboard 51., this extension principal vertical line material 534 with together with the lower edge portion of described epidermis part main body 531, enter state in described incorporating section 57, hang terminate in described to dewclaw 54f, 551d.

The backrest 5 forming is as described above installed on the installed surface 44d upwards of the described backrest pole 4 without upper vertical part, and this mounting portion entirety is blocked by covering aggregate 6 coverings.And, in this backrest 5, be assembled into all structural elements of waist support device 7 and blocking.

< cover aggregate >

Described cover aggregate 6, as shown in Fig. 1～Fig. 6, Figure 14～Figure 16, possesses: the lower backrest pole cover 61 that covers the downside of described backrest pole 4; With cover described backrest pole 4 upside the 1st, the 2nd on backrest pole cover the 62,63, the described the 1st on backrest pole cover 62 and the described the 2nd backrest pole cover 63 and can load and unload independently of each other.

Described lower backrest pole cover 61, as shown in Fig. 1～Fig. 6 and Figure 14～Figure 16, possesses: cover main body 611, and it covers the downside of described backrest pole 4; With backboard closure 612, it is integrally formed at this cover main body 611, the incorporating section of described backboard 51 57 is sealed and the epidermis part main body 531 of described backrest epidermis part 53 is held in described incorporating section 57.Described cover main body 611 possesses: base plate 613; The side plate 614 of vertical left and right from the edge, the left and right sides of this base plate 613; Be arranged at the medial surface of this biside plate 614, rib 614b with the lower surface 4b of described backrest pole 4 and the lid of lateral surface 4c butt location use, be integrated by molding synthetic resin.On the inner surface of described biside plate 614, the cover that is cross rib shape of the outstanding hole 41d that is provided with the cover installation use that is sticked in described backrest pole 4 is installed the projection 614a of use.Thereby, be integrally formed with described backboard closure 612 in the rear end of this cover main body 611.Described backboard closure 612 possesses: the cover plate 615 of the continuous shape of growing crosswise of the base plate 613 of central portion leading edge and described cover main body 611; Header board 616 with left and right vertical from the both ends leading edge of this cover plate 615 is integrated by molding synthetic resin together with described cover main body 611.Described cover plate 615 is the form corresponding with the opening shape of the described incorporating section 57 of the lower ending opening to described backrest, has the paired two ends installation base 615a in left and right, and possess the paired middle installation base 615b in left and right at pars intermedia at both ends.Described two ends installation base 615a and described middle installation base 615b are formed as respectively the shape that can not shown Screw be inserted upward from lower face side, the Screw that is inserted into described two ends installation base 615a threadingly engages in the nut portions 568 that is arranged at described backrest lower cover 56, and be inserted into described in the middle of the Screw of installation base 615b threadingly engage in the lower backrest pole cover that is arranged at described backrest shell 54 the nut portions 541g of use be installed.Thereby under this installment state, described incorporating section 57 is sealed by the cover plate 615 of described backboard closure 612.The header board 616 of described left and right is continuous with the rear end of the side plate 614 of described cover main body 611, is positioned as to clip gap and overlap with the antetheca 562 of described backrest lower cover 56 under installment state., the front part of the lower ending opening edge part 531a that described both sides extension stop part 533 is installed of described back of the body epidermis part 53 is covered by this header board 616.In addition, the rear side of the lower ending opening edge part 531a on described backrest epidermis part 53 is contained and is held in described incorporating section 57 under the back edge state that is pressed against described backboard closure 612.

On the described the 1st, backrest pole cover 62 is as shown in Fig. 3～Fig. 6, cover the part corresponding with installed surface 44d of described back of the body pole 4, be installed on the installation arm 552 of backrest 5 of described installed surface 44d and the head 556a that this installation arm 552 is fixed on to the bolt 556 of described backrest pole 4 and covered by backrest pole cover 62 on this.In other words, can, only by backrest pole cover 62 on this is unloaded the head 556a of described installation arm 552 and described bolt 556 is exposed, can backrest 5 be unloaded from described backrest pole 4.On the 1st, backrest pole cover 62 is flat to lower channel shape, have in rear end and go up upward vertical flange part 621, and there is the forwards mounting jaw 622 of bending of lower end at leading section lower surface, by this mounting jaw 622 be sticked in be arranged at described installation arm 552 square hole 553b and will be thereafter distolateral pressing, become thus installment state.Under installment state, the central authorities of the lower ending opening edge part 531a on described backrest epidermis part 53 hang stop part 532 and are covered by the flange part 621 of backrest pole cover 62 on the 1st.

On the 2nd, backrest pole cover 63 is as shown in Fig. 3～Fig. 6, covers the exposed portions serve beyond the installed surface 44d of described back of the body pole 4, with the described the 1st on backrest pole cover 62 independent.

In addition, the backboard closure 612 of the described lower backrest pole cover 61 in the cover aggregate 6 having illustrated in the above, is formed with the window 617 that the action bars 74 for making described waist support device 7 is inserted.

< waist support device >

Described waist support device, as shown in Fig. 2～Fig. 6 and Figure 14～Figure 19, possesses: the air bag 71 that lumbar support is used, and it is disposed between the described backrest shell 54 and described bolster 52 of described backrest 5; With described air supply mechanism 72, it is connected in this air bag 71 via tracheae 76, supplies with or discharge air with respect to described air bag 71.

Described air bag 71, as shown in Fig. 3～Fig. 5 and Figure 18, is to accept the supply of air and the common air bag dwindling that expands, and is held in the 54e above of described backrest shell 54 via bag 77 that can plastic deformation.Described bag 77 is a distolateral opening of left and right directions at least, the bag that threadingly engages in described backrest shell 54 by the Screw 78 that the left and right sides part to upper end connected is installed the nut portions 541a of use, thereby is installed in the 54e above of described backrest shell 54.And, in this bag 77, be accommodated with described air bag 71.;

outstanding end face

542a, 543a, the 544a interpolation of described vertical rib 542, cross rib 543 and diagonal rib 544 near the waist 54c of described backrest shell 54 are provided with the bag 77 that can be out of shape, and in this bag 77, can expand to dwindle maintains described air bag 71.

Described air supply mechanism 72, as shown in Fig. 2, Fig. 6 and Figure 14～Figure 19, possesses: to the air fed pump of described air bag 71 unit 73; With the action bars 74 for driving this pump unit 73, the described pump unit 73 that forms the major part of this air supply mechanism 72 is incorporated in the described incorporating section 57 of the bottom that is formed at described backrest 5.In other words, this air supply mechanism 72 possesses: described action bars 74, and it can clip S2Xiang Qi both sides, reference position and operate; Pump 731, it is by being operated described action bars 74 application of forces of upper side and to described air bag 71 air supplies with respect to described reference position S2 to side's side; Relief valve 732, it is by being operated described action bars 74 application of forces of lower side and the air in described air bag 71 is discharged to outside with respect to described reference position S2 to the opposing party's side; Suppress unit 733 with contrary work, it prevents or suppresses described action bars 74 and carry out work owing to crossing described reference position S2 from the contrary driving force of described pump 731 to the opposing party's side.

Described pump unit 73 is as shown in Figure 16, Figure 18 and Figure 19, be on the bar support component 79 can be on above-below direction by described action bars 74 supporting rotationally, assemble described pump 731, described relief valve 732, described contrary work suppresses unit 733 and blocking forms, and is incorporated in described incorporating section 57 so that described action bars 74 is outstanding laterally from the lower end of described backrest 5.Described bar support component 79 be possess by Screw be fixed on described incorporating section 57 courtyard part top board 791 and from two edges, the front and back metal parts of sagging bar hold-down arm 792 downwards of this top board 791, on described bar hold-down arm 792, the base end part 74a of described action bars 74 can be supported rotationally by axle.Described pump 731 is to possess to have the pump that flows into the air inflow aperture 731a of special single-way valve and have the rubber ball-type processed of the outlet 731b that discharges special single-way valve, in the situation that accepting pressing force, dwindle and inner air is discharged from described outlet 731b, in the situation that this pressing force has been eliminated, obtaining air one side ego resilience on one side from described air inflow aperture 731a is original shape.Described relief valve 732 is directly linked to the outlet 731b of described pump 731, under the state of not pressing air inflow aperture 731a, make this outlet 731b be communicated with described air bag 71 via described tracheae 76, only during described air inflow aperture 731a is pressed, the air in described air bag 71 is discharged in atmosphere.In addition, described pump 731 and described relief valve 732 are common parts, so the explanation of detailed structure is omitted.Described contrary work suppresses unit 733, possess the region of rotating from described reference position S2 to the opposing party's side at the bar main body 74b of described action bars 74 to described reference position S2 direction the spring 733a to this bar main body 74b elastic force-applying.

Described action bars 74 is as shown in Figure 1, Figure 2, shown in Fig. 4～6 and Figure 14～Figure 19, possess: described bar main body 74b, and it can rotate by described bar support component 79 and support; Pump press section 74c, it is arranged at this bar main body 74b, is rotated the in the situation that of operation described pump 731 application of forces at this bar main body 74b from described reference position S2 to side's side; With valve press section 74d, it applies power to described relief valve 732 in the situation that described bar main body 74b is rotated operation from described reference position S2 to the opposing party's side, and described pump press section 74c and valve press section 74d and described bar main body 74b are set to one in this embodiment.Described action bars 74, its tip side is configured to towards oblique lower outside, by the top operation part 74f of this action bars 74 is upwards drawn and makes described pump press section 74c press the application of force to described pump 731 from reference position S2, by described action bars 74 is pressed downwards and made described valve press section 74d press the application of force to the action button 732a of described relief valve 732 from reference position S2.This action bars 74, that the base end part 74e of described bar main body 74b, described pump press section 74c and described valve press section 74d are accommodated in described incorporating section 57 and are formed, the tip side of described action bars 74 that forms the top operation part 74f of this action bars 74 at the window 617 of backboard closure 612 that is arranged at lower backrest pole cover 61 by extending outward.

The air of discharging via relief valve 732 from the pump 731 of described pump unit 73 in addition, is directed to described air bag 71 via described tracheae 76.This tracheae 76 extends from the pump unit 73 of side's side of being accommodated in described incorporating section 57, between described backrest pole 4 and lower backrest pole cover 61 by and directed to the opposing party's side of incorporating

section

57,54e above from this incorporating section 57 at backrest shell 54 derives entrance by the not shown air that arrives the back side 77a side of described bag 77, be connected in the described air bag 71 exposing in this back side 77a side.

(detailed description of epidermis part)

Next use Fig. 9, Figure 10, Figure 15 and Figure 20, the

epidermis part

36,53 of the related chair C of present embodiment is described in detail.The

epidermis part

36,53 of this chair C is respectively the surface of seat support 3 in order to form chair C and backrest 5 and exterior.

On the epidermis part 53 of the backrest 5 shown in epidermis part 36 and the Figure 15 etc. of the seat support 3 shown in Fig. 9 and Figure 10 etc., being provided with the bellying of making of same structure as schematically shown in Figure 20 is ear 363,537.This ear 363,537 is by forming with the blank of the

1st fabric

361a, 535 same materials.And, this ear 363,537 to the 1st fabric towards the identical direction of surface direction extend.Thus, the ear 537 at epidermis part 53 places of backrest 5 further extends to two sides from the side 52 of the bolster 52 of backrest 5, and further bloat as the transversal back side 52c of circular-arc shape and extend downwards and take backsight from back side 52c the first half 52d of bolster 52, the described circular-arc shape equal with the bottom of described backrest 5 that be.In addition, the ear 363 at epidermis part 36 places of seat support 3 extends the back side 35e with transversal bolster 35, and 35d further extends to two sides from the side.

This epidermis part 36,53 as shown in figure 20, by being clipped in the middle forming cloth 363a, 357a from the ear of the 1st fabric 361a, 535, the 2nd fabric 361b, 536 different other styles, and the bellying of making arranging between the 1st fabric 361a, 535, the 2nd fabric 361b, 536 is ear 363,537.If specifically described, ear 363,537 has: the ear of the cloth shape being for example made up of the raw material identical with the 1st thicker fabric forms cloth 363a, 357a; With ear suture 363b, 537b that this ear formation cloth 363a, 357a are sewed up together with the 1st fabric 361a, the 535 and the 2nd fabric 361b, 536.And, by the folding ear moulding cloth 363a of 2 layers, the edge part 537d(363d of 357a of becoming) overlap with the 1st fabric 361a, 535 folded end 361c, 535a and the 2nd fabric 361b, 536 folded end 361d, 536a, these become cloth (536a(361d), the 537d(363d of 4 layers), 537d(363d), 535a(361c) sew up securely by ear suture 363b, 537b from the inboard of epidermis part 36,53.Thus, top 363c, 537c side have been formed with outstanding to extend, to be suitable for the length that pinches by finger etc. and the ear 363,537 of thickness to face direction from the 1st fabric 361a, 535 edge.

That is,

epidermis part

36,53 is covered in to bolster 35,52, then in order correctly to position and stretching ear 363,537, the

1st fabric

361a, 535 is preferentially stretched to face direction thus.Now, the

2nd fabric

361b, 536 bases are mainly applied in the 1st fabric 361a of tensile force, 535 pulled out condition is suitably stretched and followed simultaneously, bolster 35,52 with respect to seat support 3 or backrest 5 is correctly located, and has particularly formed well at backrest 5 the uneven entirety that do not stretch.

So in the present embodiment, ear 363,537 is clipped in the middle by having utilized the stitching of

ear suture

363b, 537b that ear is formed to cloth 363a, 357a respectively with respect to the 1st fabric 361a, the 535 and the

2nd fabric

361b, 536, arrange so extend with the edge one that only makes

epidermis part

36,53 compared with the form of ear, can easily carry out to the installation of bolster 35,52.; pinch the active forces such as this ear stretching of 363,537 o'clock; not directly to transmit to the 1st fabric 361a, the 535 and the

2nd fabric

361b, 536, but in the certain area of the length dimension along ear 363,537, transmit dispersedly via

ear suture

363b, 537b from the position pinching.Thus, while stretching pinching ear 363,537, the

1st fabric

361a, 535, the

2nd fabric

361b, 536 are located by all right, and can easily make the tensioning situation equalization of

epidermis part

36,53, can contribute to provide to obtain the chair C that well takes a seat sense.

By being made as such structure above, the

related epidermis part

36,53 of present embodiment is held making bellying while carrying out operation of forming as so-called " ear 363,537 " when mounted, can promptly carry out thus the position adjustment of epidermis part 36,53.Thus, can easily and reliably carry out overwrite job.

In the case of by by the exterior epidermis part 53 that forms described shell on the back 5, for the back of the body that can support reliably by taking a seat the person of taking a seat on one side makes its appropriate tensioning on one side and provides comfort to the person of taking a seat, in the present embodiment, carry out moulding so that 52a above and the back side 52c of the surperficial bolster 52 that is positioned at described backrest 5 are all encased.

In addition, in order to carry out swimmingly the assembling of backrest 5 by the installation exercise of further promotion epidermis part 53, in the present embodiment, ear 537 is configured to the back side medium height position of transversal described backrest 5.

And, there is no the exterior of the epidermis part 53 of fold to the entirety of lower end from the upper end of backrest 5 in order can easily to realize spreading all over, what in the present embodiment, ear 537 backsights at the back side of transversal described backrest 5 were formed as bloating downwards is circular-arc to be formed as the shape equal with the bottom of described backrest 5.

In order easily correctly to follow the shape of backrest 5 and/or seat support 3, in the present embodiment, the 1st thicker fabric 361a by being difficult to stretch, 535 with the 2nd fabric 361b, the described multiple fabric of 536 formation that are imbued with retractility.

In addition, for easy hand-held described ear 363,537, and then easily make the tensioning situation equalization of

epidermis part

36,53 for bolster 35,52 for the power dispersion that makes to apply from hand-held position, in the present embodiment, can enumerate following form: make expose and form described ear 363,537 with the described blank compared with the 1st

thick fabric

361a, 535 same materials that is difficult to extend.

In addition, for the 1st thicker fabric 361a that can be by being difficult to stretch, 535 and the

2nd fabric

361b, 536 that is imbued with retractility give the comfortable sense that takes a seat, in the present embodiment, the backrest face that described the 2nd thicker fabric 361b that is difficult to stretch is positioned at described backrest 5 is the 52a above of bolster 52, and described in be imbued with retractility the fabric side that is positioned at described backrest 5 be the side 52f of bolster 52.

Form the epidermis part 36 of described seat support 3, as giving comfortable one of the form of sense that takes a seat by described the 1st thicker fabric 361a and the 2nd fabric 361b that is imbued with retractility, in the present embodiment, be suitable for following form: described in be difficult to stretch the 1st thicker fabric 361a is positioned at described seat support 3 is the upper surface of bolster 35 with regard to sitting face, and described in be imbued with retractility the 2nd fabric 361b side that is positioned at described seat support 3 be the side 35d of bolster 35.

< variation >

Below, with reference to Figure 21, modified embodiment of the present embodiment is described.In this variation, the structural element suitable with the structural element of above-mentioned embodiment paid same-sign and its detailed explanation is omitted.

Epidermis part

36,53 shown in Figure 21 is accompanying as ear 363,537 this point of making bellying same with above-mentioned embodiment with respect to the 1st fabric 361a, the 535 and the 2nd fabric 361b, 536.The ear the 363, the 537th that this variation is related, forms like this: the

1st fabric

361a, 535 is folding under the state that extends preliminary dimension, the top 537c, the 363c that have made to fold with respect to the

2nd fabric

361b, 536 are outstanding, use

ear suture

363b, 537b to sew up securely.Even such ear also with above-mentioned embodiment similarly, the person of taking a seat or the operator of

epidermis part

36,53 is installed can be on one side pinches and carry out installation exercise on one side from being integrally formed at the top of the

1st fabric

361a, 535 ear 363,537.And, ear 363,537 connects via

ear suture

363b, 537b with respect to the

2nd fabric

361b, 536, if so ear 363,537 be stretched, the power effect of the

2nd fabric

361b, 536 Tensile in the looser scope of the bearing of trend along ear 363,537, so with above-mentioned embodiment similarly, can carry out the installation of the

epidermis part

36,53 that stretches uneven rapidly and not.

Above, embodiments of the present invention are illustrated, but the concrete structure of each several part is not merely defined in above-mentioned embodiment, in the scope that does not depart from aim of the present invention, can carries out various distortion.

For example, in order to have the durability of epidermis part and the easiness of installation exercise concurrently, the form of the fabric different by the elongation property of yarn fabric and/or braid formation is also disclosed in the above-described embodiment, in addition, similarly, even if its weaving structure of yarn fabric also has different forms, even if its knitting structure of braid has different forms, and then, use various raw materials.By being suitably suitable for fabric, can realize various forms.

In addition, for example, disclose in the above-described embodiment the form that realizes epidermis part by the combination of two kinds of raw materials, but can certainly for example be made as and described two kinds of raw materials that raw material is different making bellying.In addition, epidermis part surrounds the detailed form of backrest and/or epidermis part is hung to the concrete form such as form that terminates in seat support inner casing and is not limited to above-mentioned embodiment, comprises existing form, can be suitable for various forms.

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

The present invention can utilize as the epidermis part of the seat surface for forming chair and/or backrest face.

Claims

1. an epidermis part for chair,, be is characterized in that by exterior in order to form the seat support of chair and at least one party's of backrest surface:

The epidermis part of this chair is via forming to the outstanding bellying stitching of making of outer surface by the multiple fabric at the transversal back side.

2. the epidermis part of chair according to claim 1, wherein:

By being formed described backrest by exterior, be shaped to by described backrest above and the back side all encase.

3. the epidermis part of chair according to claim 2, wherein:

Described back side medium height position of making bellying and be configured to transversal described backrest.

4. the epidermis part of chair according to claim 3, wherein:

Described in the back side of transversal described backrest, make bellying backsight and be the shape equal with the bottom of described backrest.

5. the epidermis part of chair claimed in claim 1, wherein:

Described multiple fabric has the fabric that is difficult to the thicker fabric stretching and is imbued with retractility;

Describedly make the thicker fabric that bellying is difficult to described in making stretch and expose.

6. the epidermis part of chair according to claim 5, wherein:

The described thicker fabric that is difficult to stretch is positioned at the backrest face of described backrest, and described in be imbued with retractility fabric be positioned at the side of described backrest.

7. the epidermis part of chair according to claim 5, wherein:

By being formed described seat support by exterior;

The described thicker fabric that is difficult to stretch be positioned at described seat support with regard to sitting face, and described in be imbued with retractility fabric be positioned at the side of described backrest.

8. the epidermis part of chair according to claim 5, wherein:

The described thicker fabric that is difficult to stretch is yarn fabric system, and the fabric that is imbued with retractility is braid system.