JP6516401B2 - Chair - Google Patents

Description

  The present invention relates to a chair suitably used in an office or the like.

  Conventionally, in a chair capable of synchro-locking movement in which a seat and a backrest move together from an initial position to a locking position respectively, a spring for giving a reaction force toward the initial position to the seat and the backrest It is equipped.

  In such a chair, it is known that the spring is used to provide an initial reaction force in order to suppress rattling when the seat and backrest are respectively in the initial position. For this purpose, a spring provides reaction force to the seat and backrest, while in the initial position, the seat, backrest or a member moving with these synchro-locking operations is applied to the regulating member to place the seat and back It is employed to lock the ache in the initial position.

  As an example of a regulating member in a chair of this type in the past, a spring receiver slider or the like which strikes a spring receiver on the fixed end side of a compression coil spring and restricts movement in a direction to elastically return the compression coil spring can be mentioned. See Patent Document 1).

  However, in the configuration of the conventional restricting member, the structure is complicated, such as fitting the spring receiver to the spring receiver slider, sliding the spring receiver slider to the left and right, and advancing and retracting the spring receiver by the wedge action. Furthermore, when attaching the spring bearing slider to the support base to apply an initial reaction force, the spring bearing is fitted on the spring bearing slider, and the spring bearing is attached so that the fixed end of the spring strikes the spring bearing, Although it is necessary to mount the spring receiver slider and the spring receiver in the support base, such an operation needs to be performed while the spring is compressed, which may be perceived as complicated.

JP 2008-302083 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a chair that can be easily applied with an initial reaction force against a seat and a backrest and has a simple structure.

  That is, the chair of the present invention has the following configuration.

The chair according to claim 1 comprises a support base supported at its legs and provided at its front end with an elongated hole extending in the front-rear direction, and the front end side of the support base is moved forward and backward along the elongated hole. A seat support member supported on the support base via a possible reciprocating member, a seat supported on the seat support member, and a backrest supported on the support base so as to be able to tilt backwards; A synchro-locking mechanism for retracting the seat and the seat supporting member in association with a backward tilting operation of the backrest; and a regulating member attached to the front end side of the elongated hole to regulate the forward movement of the reciprocating member at an initial position; It is for urging the reciprocating member forward toward the regulating member, and the reciprocating member is moved to the initial position when the backward pressing force against the backrest is eliminated, and the seat and the seat are moved. Back to self-use position And the reciprocating member moves from the initial position where it abuts against the restricting member to the rear locking position as the backrest tilts from the use position to the locking position. The chair is configured such that, in the initial position, the reciprocating member is stably held in the initial position by the preload of the spring, and before the restriction member is attached to the front end of the elongated hole , the reciprocation is performed. The moving member is configured to be able to retract from the assembled position where the biasing force of the spring is zero to the locking position via the initial position, and the reciprocating member is locked at a locking position rather than the initial position. The regulating member is configured to be retrofitted while being moved to the side.

In the chair according to a second aspect of the present invention, in the configuration according to the first aspect, the front end side of the long hole is provided with a restriction member attaching portion for retrofitting the restriction member.

The chair according to claim 3 is the chair according to claim 2, wherein a bush having the long hole is attached to a front end portion of the support base, and a restriction for retrofitting the restriction member to the bush A member attachment portion is provided .

  As described above, according to the present invention, it is possible to easily provide an initial reaction force to a seat and a backrest, and to provide a chair with a simple structure.

1 is a perspective view showing an embodiment of the present invention. The front view in the embodiment. The rear view in the embodiment. The side view in the embodiment. The top view in the embodiment. The perspective view in the embodiment. The disassembled perspective view in the embodiment. The disassembled perspective view in the embodiment. The disassembled perspective view in the embodiment. The disassembled perspective view in the embodiment. The expansion perspective view which shows the bush etc. in the embodiment. Partially expanded sectional view which shows the support base etc. in the embodiment. The side view for demonstrating the internal structure in the embodiment. The side view for demonstrating the internal structure in the embodiment. The enlarged side view showing the bush etc. in the embodiment. The enlarged side view showing the bush etc. in the embodiment. The enlarged side view showing the bush etc. in the embodiment. The disassembled perspective view in the embodiment. The top view which shows the seat inner shell etc. in the embodiment. The top view which shows the seat inner shell etc. in the embodiment. 20 is an enlarged cross-sectional view taken along line X-X in FIG. The perspective view which shows the support base etc. in the embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a chair A which is an office rotary chair which is suitably used in an office or the like.

  The chair A is a chair body C fitted with a disaster response article set B as an article.

  The chair body C includes a leg 1 having a caster 11 at its lower end, a support base 2 supported by the leg 1, a seat support member 3 disposed on the support base 2, and the seat support member 3 It comprises a seat 4 supported on the upper side, a back support 5 pivotally attached to the support base 2 at its base end, and a back support 6 supported by the back support 5. The details will be described below.

  The leg 1 includes a plurality of leg vanes 12 having castors 11 on the lower surface of the tip and arranged radially, a leg post 13 erected at a collecting portion of the leg vanes 12 and a main portion of the leg post 13 A gas spring 131 is provided. The gas spring 131 has a cylinder 131a fixed to the leg vanes 12 and a rod 131b movable up and down with respect to the cylinder 131a. The support base 2 is mounted on the tip of the rod 131b. At the tip of the gas spring 131, an operation button 131c for locking and unlocking the gas spring 131 is provided. The operation of the operation button 131 c is performed by the elevation operation lever 24 rotatably attached to the support base 2.

  The support base 2 includes a support base body 21 and a support base cover 22 that covers the lower surface side of the support base body 21.

  The supporting base main body 21 is made of metal, and the bottom wall 211, left and right side walls 212 erected from both sides of the bottom wall 211, and a rear wall 213 erected on the rear side of the bottom wall 211. And a top wall 214 provided between the side walls 212 corresponding to the rear half of the bottom wall 211, and the rod 131b of the gas spring 131 penetrates the bottom wall 211 and the top wall 214. It is worn. On the front end side of the both side walls 212, a mounting hole 212x extending in the front-rear direction for mounting a bush 26 described later is formed. In the rear wall 213, lock holes 213a constituting a back tilt lock mechanism 8 described later are provided in a plurality of rows at predetermined intervals in the vertical direction. In the front half of the support base 2, a tilting reaction force generating mechanism described later in relation to the long hole 261 of the bush 26 mounted in the mounting hole 212 x is accommodated. In the long hole 261, a front shaft j1 which is a reciprocating member moving in the front-rear direction is disposed.

  The supporting base cover 22 is made of resin, and a bottom wall 221 is formed with a passage hole 221a through which the leg support 13 passes, and an inclined wall 222 extending obliquely forward from the front edge of the bottom wall 221, and inclined. It has a front wall 223 erected from the front end edge of the wall 222, and left and right side walls 224 erected respectively from left and right side edges of the bottom wall 221 and the inclined wall 222. The inclined wall 222 is provided with a manual attachment portion 222a for attaching the instruction manual on the outer surface side.

  The seat support member 3 is made of metal and is directed outward from the lower wall of the ceiling wall 31 and the left and right side walls 32 downwardly depending from the left and right side edges of the ceiling wall 31 and the lower side edges of the side walls 32. And the weir 33 extended. The front end portions of the left and right side walls 32 are supported so as to be able to move back and forth in the support base 2 via a front shaft j1 inserted in the long hole 261 of the bush 26 disposed in the support base 2. The rear end portions of the left and right side walls 32 are pivotally mounted in the middle of the back support 5 via a rear shaft j2.

  The seat 4 has a seat outer shell 41 which is a seat support fixed to the seat support member 3 and an upper face as a seat surface 4s, and can be moved in the longitudinal direction on the seat outer shell 41 via a guide rail mechanism 43 The seat body 42 is provided with a locking mechanism 44 for immovably locking the seat body 42 with respect to the seat outer shell 41.

  The seat outer shell 41 is made of synthetic resin and has a recessed portion 411 in which the seat support member 3 is accommodated in the central portion on the lower surface side and a reinforcing rib 412 on the upper surface, and the seat support member It is fixed on the third collar 33 using a screw v1. On the upper surface of the seat outer shell 41, a plurality of protrusions 413 having a distal end portion st formed wider than the proximal end portion kt are provided in a protruding manner. On the lower surface of the seat outer shell 41, a lever unit attachment portion 414 for attaching the lever unit 45 constituting the lock mechanism 44 is provided.

  The seat body 42 includes a seat inner shell 421 slidably disposed on the seat outer shell 41 in the front-rear direction, a seat cushion (not shown) provided on the seat inner shell 421, and the seat cushion And an outer covering material 422 which is a covering material surrounding the peripheral portion of the seat inner shell 421.

  The seat inner shell 421 is made of synthetic resin, and includes a plurality of slits 421 a extending in the front-rear direction, which constitute the guide rail mechanism 43 in cooperation with the projection 413 of the seat outer shell 41. Each slit 421a is provided continuously with a narrow portion wn having a width dimension corresponding to the base end kt of the protrusion 413 in a plan view, and the narrow portion wn and passing through the tip portion st of the protrusion 413 And a wide portion wm having an acceptable width dimension. That is, the seat main body 42 can be positioned in the slide area rs which can slide relative to the seat outer shell 41 and the separation area rd which can leave the seat outer shell 41 in a state where it can not be detached from the seat outer shell 41 In the slide region rs, the protrusion 413 is positioned at the narrow portion wn of the slit 421a, and in the separation region rd, the protrusion 413 is positioned at the wide portion wm of the slit 421a. Then, when the lever unit 45 is attached to the lever unit attachment portion 414 of the seat outer shell 41 in a normal posture, the seat body 42 can not move to the detachment area rd by the detachment prohibition portion 451a.

  The lever unit 45 has a frame 451 provided with a protrusion prohibiting portion 451a on its upper surface, and is vertically rotatably supported by the frame 451 and has one end exposed to the outside as an operation end 452b and the other end And a spring 453 that biases the lever 452 in a direction in which the engagement claw 452 a projects upward. Then, in a state where the frame 451 is attached to the lever unit attachment portion 414 of the seat outer shell 41 using the screw v2, the seat outer shell is attached via the first window 415 provided in the seat outer shell 41 with the detachment preventing portion 451a. An engagement claw 452 a protrudes on the seat outer shell 41 through a second window 416 provided on the seat outer shell 41 while projecting on the seat 41. In a portion of the seat inner shell 421 corresponding to the first window 415, a groove 421b is formed, into which the release prohibiting portion 451a is inserted. The longitudinal dimension of the groove 421b corresponds substantially to the slide region rs. That is, when the seat body 42 tries to slide out of the slide region rs, the detachment inhibiting portion 451a abuts on the end of the groove 421b so that the seat body 42 can not move to the detachment region rd. It has become. In other words, the separation prohibiting portion 451a doubles as the slide range restricting means 46 for restricting the sliding range of the seat body 42 with respect to the seat outer shell 41 in the front-rear direction. The slide range restricting means 46 mainly includes the groove 421 b and the separation prohibiting portion 451 a.

  A plurality of engaging claw engaging portions 421c selectively engaged with the engaging claws 452a of the lever unit 45 are spaced apart in the front-rear direction at a portion corresponding to the second window 415 of the seat inner shell 421. It is provided. That is, a lock mechanism 44 for immovably locking the seat body 42 with respect to the seat outer shell 41 is configured by the lever unit 45 and the plurality of engaging claw engaging portions 421c. In other words, the locking mechanism 44 operates between the locking position pl and the unlocking position pu by operating the lever 452 provided on the seat outer shell 41 and supported by the frame 451. And an engaging claw engaging portion 421c provided on the seat body 42 and engaging and disengaging the engaging claw 452a of the lever unit 45. The operating end 452b of the lever 452 is The pivoting operation is performed upward to temporarily release the engagement between the engagement claw 452a and the engagement claw engagement portion 421c, and the engagement claw 452a is engaged with the engagement claw engagement portion 421c which is a different hole. By doing this, the position of the seat body 42 relative to the seat outer shell 41 can be changed.

  Thus, the lever unit 45 prohibits the seat body 42 from being detached from the seat outer shell 41 when the lever unit 45 is attached to the seat outer shell 41 in the regular posture, and the lever unit 45 releases the regular posture. Since the seat body 42 is provided with the detachment inhibiting portion 451 a which allows detachment of the seat outer shell 41, moving the seat inner shell 421 to the detachment area by removing the lever unit 45 from the seat outer shell 41 Can be removed from the seat outer shell 41.

  The back support 5 has a back support main body 51 whose proximal end is supported by the support base 2 via the main shaft j3, and a lower back support cover 52 covering the proximal end side of the back support main body 51. , And with the upper back support cover 53.

  The back support main body 51 is provided with a lower frame 511 made of a plate material and an upper frame 512 mainly made of a pipe material. The lower frame 511 includes left and right support plates 511a disposed close to the outer surface side of the side wall 224 in the support base 2 and a horizontal bridge 511b having a three-dimensional structure for rigidly connecting the support plates 511a.

  The left and right support plates 511a are flat plates made of steel plates, and the front end is rotatably supported by the support base 3 via the main shaft j3. The rear end portion of the left and right support plates 511a is provided with a pipe attachment portion 511c for rigidly connecting the upper frame 512. The cross member 511b is in the form of a channel opened upward, and both ends thereof are rigidly connected to the inner side surface of the support plate 511a via a weld joint. Specifically, the cross member 511b is provided on the bottom wall x1, the front wall x2 erected on the front edge of the bottom wall x1, and the rear wall of the bottom wall x1 facing the front wall x2 And a rear wall x3.

  The upper frame 512 includes a pipe member 512a whose proximal end is rigidly connected to the pipe attachment portion 511c via a weld joint, and a lower bracket 512b and an upper bracket 512c for connecting the pipe members 512a. . The lower bracket 512b and the upper bracket 512c are rigidly connected to the pipe member 512a through a welded joint, and the backrest 6 is attached to the lower bracket 512b and the upper bracket 512c.

  A back tilting lock mechanism 8 is provided between the back support 5 and the support base 2 to lock the backrest 6 in a desired rearward tilting position. The back tilting lock mechanism 8 engages the engaging member 513 provided on the back support 5 with the lock hole 213 a provided using the wall of the support base 3 to bring the back support 5 into a predetermined tilting position. It is something that can be locked. That is, in the back tilt lock mechanism 8, lock holes 213 a which are engaging portions of a plurality of rows are provided at intervals in the vertical direction on the back wall 213 of the support base 2, and are held by the back support bar 5 and move The engaging member 513 can be selectively engaged with any one of the lock holes 213a. Specifically, the engaging member 513 is a plate-like member which is held so as to be movable back and forth by slits provided at the lower ends of the front wall x2 and the rear wall x3 of the horizontal support 511b of the back support rod 5. The front edge thereof is provided with a protrusion 513a engageable with any row of the lock holes 213a. The engagement member 513 is placed in one of a lockable state that is elastically biased forward by the biasing mechanism 8a and an unlocked state (not shown) that is elastically biased rearward. The biasing mechanism 8a includes a rearward tilt lock operation lever 514 movable between the lock position Pa and the unlock position Pb, and the engagement member 513 when the rearward tilt lock lever 514 is at the lock position Pa. And a torsion coil spring 515 which elastically biases the engaging member 513 rearward when the rearward tilt lock operating lever 514 is at the lock release position Pb. The torsion coil spring 515 has one end supported by the backward tilt lock operating lever 514 and the other end supported by the engagement member 513, and the backward tilt lock operating lever 514 is released from the lock position Pa to the lock release position Pb. It is disposed so that the biasing direction to the engaging member 513 is reversed when passing through the thought point when it is moved up. The biasing mechanism 8a in this embodiment biases the engaging member 513 forward when the backward tilt lock operating lever 514 is at the lock position Pa, and when the backward tilt lock operating lever 514 is at the unlocking position Pb. Is configured to bias the engagement member 513 rearward.

  The lower back support cover 52 is provided below the seat surface 4a, and is provided with a welding portion 521 to which the disaster response article set B, which is an article suspended and supported by a support member E such as a belt, can be attached. Have. The attachment portion 521 is provided with an upright wall 521a which is a vertical portion to which the side surface side of the storage member B2 in the disaster protection article set B can attach and a top wall 521b which is a horizontal portion to which the upper surface side of the storage member B2 can attach . And space sp for arranging disaster response article set B mainly with standing wall 521a and top wall 521b is formed. That is, the joint portion 521 is disposed in the back support 5, the vertical portion is a standing wall 521 a formed in the back support 5, and the horizontal portion is formed in the back support 5. It is a heaven wall 521 b.

  Specifically, the lower back support cover 52 has a bottom wall 522 that covers the support base 2 and a part of the lower frame 511 of the back support 5 from the lower side, and a rear end of the bottom wall 522 It comprises: the standing wall 521a rising upward; the top wall 521b extending rearward from the upper end of the standing wall 521a; the top wall 521b, the standing wall 521a, and left and right side walls 524 integrally provided on both sides of the bottom wall 522. The ceiling wall 521b and the standing wall 521a form an L-shaped portion in a side view. Thus, the space sp surrounded by the joint portion 521, which is the attachment portion of the article provided with the standing wall 521a and the top wall 521b, is formed at the rear of the support base 3 and the space sp The disaster response article set B, which is an article, is disposed in a state of being attached to the ceiling wall 521b and the standing wall 521a. The disaster response article set B accommodates the storage member B2 with disaster response articles such as a head protection hat and a flashlight for temporarily responding to a disaster.

  The upper back support cover 53 is for covering the connecting portion of the lower frame 511 and the upper frame 512 of the back support 5, and a nut portion of the lower back support cover 52 through a bolt insertion hole (not shown). It is attached to the back support main body 51 by the bolt (not shown) screwed to 521c.

  The backrest 6 comprises a backrest main body 61 and a back outer shell 62 disposed behind the backrest main body 61.

  The backrest main body 61 is a back inner shell 612, a back cushion (not shown) attached to the front of the back inner shell 612, and a tension covering the back cushion and the peripheral portion of the back inner shell 612. An exterior material 613 is provided. The back inner shell 612 is made of synthetic resin and is divided into a back outer shell attachment area 612a covered by the back outer shell 62 and an upper extension area 612b extending above the back outer shell attachment area 612a. The back outer shell mounting area 612a is surrounded by a surrounding wall ya. A large number of vertical ribs yb and horizontal ribs yc are provided in a lattice form on the back side of the back outer shell mounting area 612a, and the upper and lower back support bar mounting portions are positioned to avoid the vertical ribs yb and the horizontal ribs yc. There are provided yd, a plurality of bosses ye for attaching the peripheral edge of the back outer shell 62, and a nut yf for fixing the upper edge of the back outer shell 62. The upper extension area 612 b has a large number of longitudinal ribs yg and transverse ribs yh on the back side, and the front and back surfaces are all covered with the exterior material 613.

  The back outer shell 62 is formed under the back outer shell main body 621 and a handle unit HU disposed at the upper part of the back outer shell main body 621 and having a handle portion 622 which can be gripped by the user And a standing wall portion 623 disposed at the back in a rear view of the finger insertion opening 624.

  More specifically, the spine outer shell main body 621 has a shape corresponding to the spine outer shell mounting area 612 a of the spine inner shell 612, and is fitted to the outer periphery of the surrounding wall ya of the spine inner shell 612 at its periphery Peripheral wall 621a. A recessed portion 621b is formed on the back side in the upper end portion middle region of the back outer shell main body 621, and the peripheral wall ya does not exist in a portion corresponding to the recessed portion 621b. The recessed portion 621b is for mounting the handle portion 622, and a mounting portion 621c for mounting the handle portion 622 is provided on the back wall wk. The mounting portion 621c includes a flat seating surface za and a bolt insertion hole zb formed through a portion corresponding to the seating surface za. In a portion of the spine outer shell main body 621 corresponding to the boss portion ye of the spine inner shell 612, a convex portion 621e engaged with the boss portion ye is formed.

  The handle unit HU is made of a synthetic resin formed separately from the back outer shell main body 621, and the handle unit HU and the back outer shell main body 621 are opposed to the backrest main body 61 by a common bolt v3. Are tightened together. Specifically, the handle unit HU is fitted to the recessed portion 621b of the spine outer shell main body 621 and has left and right side walls zc, a handle portion 622 provided above the side walls zc, and the side walls A lower wall zd installed between the lower edges of zc and a front wall ze installed between the front edges of the side walls zc, between the handle portion 622 and the lower wall zd An opening 624 is formed for inserting a finger. A bolt insertion hole zf is formed in the front wall ze, and the front wall ze is a back wall wk of the recessed portion 621b in a state where the handle unit HU is fitted to the recessed portion 621b of the back outer shell 62. The bolt insertion hole zf of the front wall ze and the bolt insertion hole zb of the back wall wk coincide with each other. Then, by screwing the bolt v3 having passed the bolt insertion holes zf and zb into the nut portion yf of the back inner shell 612, the handle portion 622 and the back outer shell main body 621 are back tightened to the main body 61. There is. When the handle unit HU is attached to the recessed portion 621b of the back outer shell main body 621, the back surface of the handle unit HU and the back surface of the back outer shell main body 621 are flush and continuous. The bolt insertion hole zf provided on the front wall of the handle unit HU is provided with a counterbore hole zf1 for accommodating the head of the bolt v3, and the head of the bolt v3 fastened together is in the front wall ze. Are supposed to be buried. In this state, a cover 623 constituting an upright wall portion is detachably attached to the back of the front wall ze.

  The cover 623 covers the head of the bolt v3 and the surrounding area so as not to be visible from the outside, and can be abutted when the finger inserted from the opening 624 extends to the back. . The cover 623 is made of resin whose size is set such that the backrest main body 61 can not be seen through the opening 624 in a rear view. The cover 623 is rectangular and has an engagement protrusion 623a engaged with the positioning hole zg of the handle unit HU at the lower edge, and an elastic deformation of the member in the engagement hole 621d of the back outer shell main body 621 at the upper edge It has an elastic claw 623b which is utilized and engaged. The cover 623 is engaged with the engaging hole 621d by engaging the engaging projection 623a with the positioning hole zg and then rotating the cover 623a in the backward direction to engage the engaging hole 621d. It is mounted in a state of being in contact with the back of the front wall ze.

  The chair body C configured as described above can move the backrest 6 from the use position (U) to the locking position (R) as shown in FIG. 13 and FIG. When the pressing force is eliminated, the backrest 6 self-returns to the use position (U) by the action of the tilting reaction force generating mechanism 9. When the backrest 6 is tilted by the action of the synchro locking mechanism SY, the seat 4 is tilted at a constant rate in conjunction with the tilting.

  The tilting reaction force generation mechanism 9 is provided in the support base 2 and includes a pair of springs S, a base end spring retainer 91 for holding the base end portions of the springs S, and a tip end of the springs S. And a distal end side spring retainer 92 for holding the seat portion, and transmitting the biasing force of the spring S to the front shaft j1 via the distal end side spring retainer 92, the seat 4 and the backrest 6 are provided. It is biased in the use position (U) direction. The magnitude of the biasing force of the spring S can be changed by changing the position of the proximal end side spring retainer 91 by the reaction force adjusting mechanism 93. The front end side spring retainer 92 is provided with a groove 921 having a semicircular cross section on the front surface thereof, and the groove 921 holds the middle portion of the front shaft j1. The reaction force adjustment mechanism 93 is disposed so that the axis is directed to the left and right, and the feed screw member 941 rotates integrally with the reaction force adjustment lever 94 around the axis by rotating the reaction force adjustment lever 94; An advancing and retracting member 95 which is screwed to the feed screw member 941 and reciprocates in the left and right direction along with the forward and reverse rotation of the feed screw member 941; And a cam mechanism 96 for converting the position change of the retainer 91 in the front-rear direction.

  The synchro locking mechanism SY supports the front end side of the seat support member 3 supporting the seat 4 so as to be movable back and forth by the support base 2 via the front shaft j1, and the rear end side of the seat support member 3 as the rear shaft j2. It is supported in the middle of the back support 5 via According to this synchro-locking mechanism SY, when the backrest 6 is tilted backward from the use position (U) to the locking position (R), the seat support member 3 performs a retraction operation while sinking the rear end side. The front shaft j moves from the use position (U) to the locking position (R) along the long hole 261 of the bush 26 disposed in the support base 2. The chair body C has a front shaft j1 as a reciprocating member that reciprocates along with the synchro locking operation of the seat 4 and the backrest 6, and a restriction that locks the front shaft j1 at an initial position p2 shown in FIG. The front shaft j1 has a biasing force of the spring S of zero before the attachment of the regulating member 25 from the assembling position p1 shown in FIG. 17 through the initial position p2 It is configured to be able to move to the locking position p3 shown in FIG. 16, and configured so that the restriction member 25 can be attached later in a state where the front shaft j1 is moved closer to the locking position p3 than the initial position p2. It is done. That is, at one end side of the elongated hole 261, a regulating member attaching portion 262 for retrofitting the regulating member 25 is provided.

  More specifically, as shown in FIG. 7, an attachment hole 212x in the form of a long hole is formed in the front end of the support base 2, and the front shaft j1 can be reciprocated in the anteroposterior direction in the attachment hole 212x. A resin bush 26 having a long hole 261 for guiding is provided. The restriction member attachment portion 262 is formed on the front end side of the bush 26 so as to be continuous with the long hole 261. The elongated hole 261 has a width corresponding to the front shaft j 1, and the restricting member attachment portion 262 has an opening width larger than the width of the elongated hole 261. The restricting member 25 is an axial member having a deformed cross section which can be fitted to the restricting member attaching portion 262, and as shown in FIGS. 11 and 15 to 17, the front shaft is disposed at a portion facing the long hole 261. A locking portion 251 for locking j1 is provided. During normal use, the front shaft j1 reciprocates in the front-rear direction from an initial position p2 abutting on the locking portion 251 of the regulating member 25 to a rear locking position p3. As shown in FIG. 7, the restricting member 25 has a positioning ridge 252 at its inner end, and a grip section 253 which can be gripped with fingers inside the ridge 252, and the knob section 253 is It is made to be able to retrofit by pinching and inserting the control member 25 into the control member attachment portion 262 from the inside.

  As shown in FIGS. 11 and 15 to 17, the regulating member 25 is inserted between the regulating member 25 and the bush 26 to a regular position where the wedge 252 abuts on the bush 26. A retaining mechanism 27 is provided which mutually engages in the state. The retaining mechanism 27 includes an engaging portion 254 provided on the side of the restricting member 25 and an elastic claw 263 provided on the side of the bush 26 and elastically engaged with the engaging portion 254 using the insertion operation of the restricting member 25. And the The bushes 26 and the restriction members 25 forming the long holes 261 are respectively provided on the left and right side walls 212 of the support base 2 in correspondence with both end portions of the front shaft j1.

  As shown in FIG. 17, at a stage before the both regulating members 25 are mounted, a position where the front shaft j1 enters into the regulating member attaching portion 262, that is, an assembling position where the biasing force of the spring S becomes zero. It is possible to exist in p1. Therefore, the front shaft j1 is inserted into the assembly position p1 in the previous stage where the restriction member 25 is not attached, and is brought into contact with the distal spring retainer 92 in an unloaded state, and then the back shaft 6 is inclined backward The j1 passes through the initial position p2 and is moved in the direction of the locking position p3. In this state, the restriction members 25 are attached to the restriction member attachment portions 262 from the inside as shown in FIGS. In this state, if the pressing force to the rear 6 is released, the front shaft j1 is moved forward by the biasing force of the spring S, and more precisely, the locking portion 251 of the regulating member 25. It will be locked at the initial position p2 which abuts on. In the initial position p2, as shown in FIG. 15, the front shaft j1 is stably held at the initial position p2 by the preload of the spring S, and the backrest 6 and the seat 4 stand still at the use position (U).

  The chair main body C in this embodiment covers the front shaft j1 as a reciprocating member that reciprocates along with the synchro locking operation of the seat 4 and the backrest 6, and substantially the entire area in the operation range of the front shaft j1. The front shaft j1 is pressed from two opposing directions, and a resin resistance member 28 that provides frictional resistance to its reciprocating motion is provided.

  As shown in FIGS. 11 and 15 to 17, the resistance member 28 has a pair of sandwiching portions 281 sandwiching the front shaft j1 and a first connecting portion 282 connecting one ends of the sandwiching portions. And a second connecting portion 283 connecting the other ends of the pinching portions 281 with each other. The resistance member 28 sets the separation dimension w2 between the pinching portions 281 smaller than the diameter w1 of the front shaft j1, ie, the outer diameter dimension w1 in the pinching direction of the front shaft j1, The two pinching portions 281 are elastically pressed against the resistance member 28 by a repulsive force. The separation distance w2 between the pinching portions 281 is set to about three fifths of the outer dimension w1 of the front shaft j1. The resistance member 28 is integrally provided on the bush 26. In the resistance member 28, the first and second connection portions 282 and 283 are integrated with the bush 26 and most of the both pinching portions 281 are separated from the bush 26 via the slits 284. There is. Specifically, the two pinching portions 281 are in the form of a leaf spring, and the first connecting portion 282 has a U-shape in a side view connecting the end portions of the two pinching portions 281. It is. The second connecting portion 283 doubles as the restricting member attaching portion 262, and the restricting member attaching portion 262 and the first connecting portion 282 are integrated with the bush 26. The bush 26 and the resistance member 28 are integrally molded using POM (polyacetal) resin.

  The chair body C in this embodiment has the following configuration in addition to the above-described structure. The backrest 6 of the chair main body C has a curved wide shape so that the both ends surround the both sides of the seated person with the lower half 6b slightly inclined forward. The upper half portion 6a is slightly inclined rearward and continuous with the lower half portion 6b via a bending portion 6c bent in a V-shape in a side view. The upper half 6a is narrower than the lower half 6b. The upper surface 6s of the lower half 6b extending to the front side of the upper half 6a is set to be substantially continuous with the upper surface 7s of the armrest 7.

  The armrest 7 is provided with an armrest main body 71 having a U-shaped side view opened backward, and a mounting arm 72 for attaching the armrest main body 71 to the seat outer shell 41 of the seat 4. An elbow support surface 7s, which is the upper surface 6s of the lower back portion 6b of the backrest 6, is set to be substantially continuous with the upper surface 6s. The lower surface 711 of the armrest main body 71 is set to be substantially continuous with the lower surface 6 u of the backrest 6. The disaster response article set B is mounted on the chair body C formed in this manner. In other words, the chair A is provided with a disaster response product that can be used at the time of a disaster, and includes the chair main body C and the disaster response product set B.

  The disaster response article set B accommodates the aforementioned disaster response article substantially corresponding to the contents of one person in the interior of the storage member B2, and is a mounting portion for attaching the disaster response article set B. 521 is placed on the back support 5. That is, the disaster response article is disposed below the seating surface 4s of the seat 4. The disaster response article set B is suspended and supported by the support member E with respect to the back support 5 in a state of being in contact with the joint portion 521. The support member E in this embodiment is mainly composed of a belt-like member provided with a hook and loop fastener that is attachable to and detachable from the end, and is passed over the upper back support cover 53 to support the back support 5. On the other hand, the disaster response product set B is suspended and supported.

  As described above, in the chair A according to the present embodiment, the front shaft j1 passes through the initial position p2 from the assembly position p1 where the biasing force of the spring S is zero before the restriction member 25 is attached. Thus, the restricting member 25 can be attached to the locking position p3 while the front shaft j1 is moved closer to the locking position p3 than the initial position p2. Therefore, the attachment of the regulating member 25 and the application of the initial reaction force to the seat 4 and the backrest 6 can be easily performed by the simple configuration.

  Further, the front shaft j1 is in the form of a shaft that is guided by the long hole 261 to reciprocate, and provided with a restriction member attachment portion 262 for attaching the restriction member 25 to one end side of the long hole 261. Therefore, the structure which retrofits the control member 25 to the support base 2 is realizable by easy structure.

  Since the restriction member attachment portion 262 is provided on the resin bush 26 mounted in the attachment hole 212x of the support base 2, the attachment hole 212x need only be provided on the support base 2 side. There is no need to make design changes to make the 25 mountable.

  Since the long hole 261 for guiding the front shaft j1 is formed in the bush 26, not the mounting hole 212x of the support base 2 but the long hole 261 is in sliding contact with the front shaft j1. Therefore, the portion provided with the mounting hole 212 x is hard to be worn, and when the portion provided with the long hole 261 of the bush 26 is worn, the bush 26 may be replaced and maintenance is easy.

  The friction member reciprocates the front shaft j1 by having the resistance member 28 provided with the pair of sandwiching parts 281 sandwiching the front shaft j1 and the connecting part 282 connecting one ends of the sandwiching parts 281. Resistance can be provided, and a bottoming feeling can be alleviated when the seat 4 and the backrest 6 are tilted backward. In addition, the spring S can be weak, that is, the spring constant can be small.

  Since the retaining mechanism 27 is provided between the restricting member 25 and the restricting member attachment portion 262, the restricting member 25 can be stably attached to the bush 26 and the support base 2.

  The retaining mechanism 27 is provided on an engagement portion 254 provided on the regulation member 25 side, and elastically engaged with the engagement portion 254 using the insertion operation of the regulation member 25 provided on the regulation member attachment portion side 262 Since the elastic claws 263 are provided, it is possible to easily form such a retaining mechanism 27.

  Then, since the restricting member 25 is provided with the locking portion 251 for locking the front shaft j1 at a portion facing the long hole 261, the front shaft j1 is stably locked at the initial position p2. Can be

  The present invention is not limited to the embodiments detailed above.

  For example, as the reciprocating member, not the front shaft of the seat support member but, for example, a protrusion projecting downward from the lower surface of the seat support member is provided, and this protrusion is guided to the long hole provided on the support base side It is also conceivable to use other members as the members.

  The restricting member attaching portion for retrofitting the restricting member may be provided not only at one end side of the long hole but also at another place.

  Instead of mounting a resin bush in the mounting hole of the support base as in the embodiment described above and guiding the front shaft of the seat support member, which is a reciprocating member, in the long hole provided in the bush, It is also possible to adopt a mode in which the reciprocating member is directly guided to the long hole.

  Instead of providing a retaining mechanism between the restricting member and the restricting member mounting portion, for example, when the restricting member is pressed into the restricting member mounting portion and the restricting member is removed from the restricting member mounting portion, a large frictional force is generated therebetween. Alternatively, the regulation member may be held by the regulation member attachment portion by another method such as generation of

  Further, even in the case where the retaining mechanism is provided, the invention is not limited to a mode in which the engaging portion on the regulating member side and the elastic claw on the regulating member mounting portion are elastically engaged. It is possible to adopt other modes such as engaging with the engaging portion on the provided restricting member attaching portion side.

  Needless to say, the locking portion for locking the reciprocating member at the initial position is not limited to the portion facing the long hole of the regulating member, and may be provided at another portion.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

A ... chair 1 ... leg 2 ... supporting base 25 ... regulating member 4 ... seat 6 ... backrest j1 ... front shaft p1 ... assembling position p2 ... initial position p3 ... locking position

Claims (3)

A support base having a long end supported on the leg and extending in the front-rear direction at the front end, and the reciprocating member disposed on the support base and capable of moving the front end side back and forth along the long hole The seat support member supported by the support base, the seat supported on the seat support member, the backrest supported so as to be able to move backward on the support base, and the backrest movement of the backrest A synchro locking mechanism for retracting the seat and the seat supporting member, a regulating member attached to the front end side of the elongated hole for regulating the forward movement of the reciprocating member at an initial position, and the reciprocating member as the regulating member In order to urge forward, the reciprocating member is moved to the initial position to return the seat and the backrest to the use position when the backward pressure against the backrest is released. Equipped with a spring,
The reciprocating member is configured to move from the initial position where it abuts against the restricting member to the rear locking position as the backrest tilts backward from the use position to the locking position, the initial position And a chair in which the reciprocating member is stably held in the initial position by the preload of the spring.
In a state before the restriction member is attached to the front end side of the long hole , the reciprocating member can move backward from the assembly position where the biasing force of the spring is zero to the locking position via the initial position. The chair is characterized in that it is configured in such a manner that the regulating member can be retrofitted in a state where the reciprocating member is moved to the locking position side with respect to the initial position. The chair according to claim 1 , further comprising: a restricting member attaching portion for retrofitting the restricting member on the front end side of the long hole . The chair according to claim 2 , wherein a bush having the long hole is attached to a front end portion of the support base, and the bush is provided with a restriction member attaching portion for retrofitting the restriction member .

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