JP2015084857A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair which is excellent in the degree of freedom of design for forming a space to insert fingers so that a user can grip a handle part.SOLUTION: A chair comprises a backrest having a backrest body with a back cushion disposed in front of a back inner shell and a back outer shell disposed behind the backrest body. The back outer shell comprises: a back outer shell body formed in such a way that a left side part and a right side part in un upper part are spliced to the backrest body, and that the backrest body is exposed to the outside between the left side part and right side part; and a handle part disposed between the left side part and right side part so that a user can grip.

Description

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

  2. Description of the Related Art Conventionally, a chair is known in which an opening for inserting a finger is formed in the upper part of a backrest, and a part of a peripheral portion forming the opening is used as a handle for a user to carry or move. (For example, see Patent Document 1).

  By the way, some office swivel chairs have a backrest having a backrest body with a back cushion disposed in front of the back inner shell and a back outer shell disposed behind the backrest body. Even in the chair having such a configuration, a chair having a handle portion on the back outer shell has appeared.

  However, this type of chair has a problem in that it is difficult to form a space necessary for the user to grip the handle portion due to its configuration. In a conventional chair, the handle portion of the back outer shell is curved so as to be convex upward, and the left and right side portions to which the handle portion of the back outer shell is fixed are warped backward to separate from the backrest body. In other words, measures have been taken to form a space for the user to easily hold the handle portion. In other words, in this type of conventional chair, the degree of freedom in design for inserting a finger to grip the handle portion has been low.

JP2012-085904A

  The present invention has been made by paying attention to the above circumstances, and provides a chair having a high degree of design freedom for forming a space for allowing a user to insert a finger so as to grip the handle portion. There is.

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

  The chair according to claim 1 includes a backrest having a backrest body having a back cushion disposed in front of the back inner shell and a back outer shell engaged with the back inner shell disposed behind the backrest body. A chair comprising a leg having a caster at a lower end for supporting the backrest, wherein the back outer shell attaches the left side and the right side of the upper part to the backrest body. A back outer shell body formed so that the backrest body can be exposed to the outside between the left side portion and the right side portion, and a handle that can be gripped by a user disposed between the left side portion and the right side portion Part.

  According to a second aspect of the present invention, in the configuration according to the first aspect, the handle portion is formed integrally with the back outer shell main body.

  According to a third aspect of the present invention, in the configuration according to the first aspect, the handle portion is formed separately from the back outer shell main body, and the attachment portion of the handle portion is attached to the backrest main body. In addition, the back outer shell body is covered.

  According to a fourth aspect of the present invention, in the configuration according to the first, second, or third aspect, the upper portion of the back outer shell main body has a shape in which a central portion in the left-right direction is recessed in a rear view.

  According to a fifth aspect of the present invention, in the configuration according to the first, second, or third aspect, the chair includes an opening for exposing the backrest main body to the outside at an upper portion of the back outer shell main body. The left side and the right side are arranged on the left and right sides of the opening for use.

  As described above, according to the present invention, it is possible to provide a chair excellent in design freedom for forming a space for allowing a user to insert a finger so as to hold the handle portion.

The perspective view which shows one Embodiment (1st embodiment) of this 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 exploded perspective view in the embodiment. The perspective view of the back outer shell in the embodiment. The exploded perspective view in the embodiment. The expansion perspective view which shows the bush etc. in the same embodiment. The partial expanded sectional view which shows the support base etc. which were cut | disconnected by the WW line in FIG. The side view for demonstrating the internal structure in the embodiment. The side view for demonstrating the internal structure in the embodiment. The expanded side view which shows the bush etc. in the same embodiment. The expanded side view which shows the bush etc. in the same embodiment. The expanded side view which shows the bush etc. in the same embodiment. The exploded perspective view in the embodiment. The top view which shows the seat inner shell in the same embodiment. The top view which shows the seat inner shell in the same embodiment. XX line expanded sectional view in FIG. The perspective view which shows the support base part etc. in the same embodiment. The perspective view which shows other embodiment (2nd embodiment). The exploded perspective view of the embodiment. The perspective view which shows other embodiment (3rd embodiment). The exploded perspective view of the embodiment. The perspective view which shows other embodiment (4th embodiment). The partial expansion perspective view of the embodiment.

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

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

  The chair A is a chair body C to which a disaster response product set B as an article is attached.

  The chair body C includes a leg 1 having a caster 11 at a lower end, a support base 2 supported by the leg 1, a seat support member 3 disposed on the support base 2, and a seat support member 3 A seat 4 supported above, a back support rod 5 having a base end portion pivotally attached to the support base 2, and a backrest 6 supported by the back support rod 5 are provided. Details will be described below.

  The leg 1 includes a plurality of leg blades 12 that are radially provided with casters 11 on the lower surface of the front end portion, leg struts 13 that are erected on the assembly of the leg blades 12, and main portions of the leg struts 13. And a gas spring 131 formed. The gas spring 131 includes a cylinder 131a fixed to the leg blade 12 and a rod 131b that can be moved up and down with respect to the cylinder 131a. The support base 2 is attached to the tip of the rod 131b. An operation button 131 c for locking and unlocking the gas spring 131 is provided at the tip of the gas spring 131. The operation button 131c is operated by a lifting operation lever 24 that is rotatably attached to the support base 2.

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

  The support base body 21 is made of metal, and includes a 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 ceiling wall 214 provided between the both side walls 212 corresponding to the rear half of the bottom wall 211, and the rod 131 b of the gas spring 131 penetrates the bottom wall 211 and the ceiling wall 214. It is worn. An attachment hole (not shown) extending in the front-rear direction for attaching a bush 26 described later is formed on the front end side of the both side walls 212. The rear wall 213 is provided with a plurality of rows of lock holes 213a constituting a back tilt lock mechanism 8 described later at predetermined intervals in the vertical direction. A tilt reaction force generation mechanism, which will be described later, is accommodated in the front half of the support base 2 in relation to the long hole 261 of the bush 26 mounted in the mounting hole. A front shaft j1 that is a reciprocating member that moves in the front-rear direction is disposed in the long hole 261.

  The support base cover 22 is made of resin, and includes a bottom wall 221 in which a passage hole 221a through which the leg support 13 passes is formed, an inclined wall 222 extending obliquely forward from the front edge of the bottom wall 221, and this inclination A front wall 223 erected from the front end edge of the wall 222 and left and right side walls 224 erected from the left and right side edges of the bottom wall 221 and the inclined wall 222 are provided. The inclined wall 222 includes a manual attachment part 222a for attaching a manual to the outer surface side.

  The seat support member 3 is made of metal, and has a top wall 31, left and right side walls 32 suspended downward from left and right side edges of the top wall 31, and outward from the lower edges of the side walls 32. And a ridge 33 extended. The front end portions of the left and right side walls 32 are supported by the support base 2 so as to be able to move back and forth via a front shaft j1 inserted through a long hole 261 of a bush 26 disposed in the support base 2. The rear ends of the left and right side walls 32 are pivotally attached to the back support rod 5 via a rear shaft j2.

  The seat 4 is a seat outer shell 41 fixed to the seat support member 3, and the upper surface is a seat surface 4 s, and can be moved in the front-rear direction on the seat outer shell 41 via a guide rail mechanism 43. The seat main body 42 arranged and a lock mechanism 44 for locking the seat main body 42 to the seat outer shell 41 so as not to move are provided.

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

  The seat body 42 includes a seat inner shell 421 that is slidable in the front-rear direction on the seat outer shell 41, a seat cushion (not shown) provided on the seat inner shell 421, and the seat cushion. And an exterior material 422 which is a stretched material that wraps around the peripheral edge 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 constituting the guide rail mechanism 43 in cooperation with the protrusions 413 of the seat outer shell 41. Each of the slits 421a has a narrow portion wn having a width corresponding to the base end portion kt of the projection 413 in plan view, and the slit 421a is provided continuously to the narrow portion wn and passes through the distal end portion st of the projection 413. And a wide portion wm having an allowable width dimension. That is, the seat main body 42 can be positioned in the slide region rs that can slide relative to the seat outer shell 41 and the separation region rd that can be detached from the seat outer shell 41 in a state where the seat main body 42 cannot be detached from the seat outer shell 41. In the slide region rs, the projection 413 is positioned at the narrow portion wn of the slit 421a, and in the separation region rd, the projection 413 is positioned at the wide portion wm of the slit 421a. 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 main body 42 cannot be moved to the separation region rd by the separation prohibiting portion 451a.

  The lever unit 45 includes a frame 451 provided with a separation prohibiting portion 451a having a protruding shape on the upper surface, and is supported by the frame 451 so as to be pivotable in the vertical direction. A lever 452 having an engaging claw 452a, and a spring 453 for urging the lever 452 in a direction in which the engaging claw 452a protrudes 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 separation prohibiting portion 451a is disposed through the first window 415 provided in the seat outer shell 41. 41, and the engaging claws 452a protrude on the seat outer shell 41 through the second window 416 provided on the seat outer shell 41. A groove 421b into which the separation prohibiting portion 451a is inserted is formed at a portion corresponding to the first window 415 of the seat inner shell 421. The length dimension in the front-rear direction of the groove 421b substantially corresponds to the slide region rs. That is, when the seat main body 42 tries to slide out of the slide region rs, the separation prohibiting portion 451a abuts against the end of the groove 421b so that the seat main body 42 cannot move to the separation region rd. It has become. In other words, the detachment prohibiting portion 451a also serves as the slide range regulating means 46 for regulating the slide range in the front-rear direction with respect to the seat outer shell 41 of the seat body 42. The slide range restricting means 46 is mainly composed of a groove 421b and a separation prohibiting portion 451a.

  In a portion corresponding to the second window 415 of the seat inner shell 421, a plurality of engaging claw engaging portions 421c that selectively engage with the engaging claw 452a of the lever unit 45 are spaced apart in the front-rear direction. Is provided. That is, the lever unit 45 and the plurality of engaging claw engaging portions 421c constitute a lock mechanism 44 for locking the seat body 42 to the seat outer shell 41 so as not to move. In other words, the locking mechanism 44 operates by operating a lever 452 provided on the seat outer shell 41 that is received by the seat and supported by the frame 451, so that the engagement claw 452a is positioned between the locking position pl and the unlocking position pu. And an engaging claw engaging portion 421c provided on the seat main body 42 to engage and disengage the engaging claw 452a of the lever unit 45. The operating end 452b of the lever 452 is By rotating upward, the engagement between the engagement claw 452a and the engagement claw engagement portion 421c is temporarily released, and the engagement claw 452a is engaged with the engagement claw engagement portion 421c which is a different hole. By doing so, 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 main body 42 from being detached from the seat outer shell 41 when attached to the seat outer shell 41 in a regular posture, and releases the regular posture when the seat body 42 is released from the regular posture. Since the seat main body 42 is provided with the separation prohibiting portion 451a that allows the seat main body 42 to be detached from the seat outer shell 41, the seat inner shell 421 is moved to the separation region by removing the lever unit 45 from the seat outer shell 41. Can be removed from the seat outer shell 41.

  The back support rod 5 includes a back support rod main body 51 whose base end is supported by the support base 2 via the main shaft j3, and a lower back support rod cover 52 that covers the base end side of the back support rod main body 51. The upper back support cover 53 is provided.

  The back support rod main body 51 includes 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 member 511b having a three-dimensional structure that rigidly connects the support plates 511a.

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

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

  A back tilt lock mechanism 8 for locking the backrest 6 at a desired backward tilt position is provided between the back support rod 5 and the support base 2. The back tilt lock mechanism 8 engages an engagement member 513 provided on the back support rod 5 with a lock hole 213a provided using the wall of the support base 3, and puts the back support rod 5 in a predetermined tilt position. It can be locked. That is, the back tilt lock mechanism 8 is provided with a plurality of rows of locking holes 213a at intervals in the vertical direction on the rear wall 213 of the support base 2 and moved while being held by the back support rod 5. 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 that is held back and forth by slits provided at the lower ends of the front wall x2 and the rear wall x3 of the horizontal member 511b of the back support rod 5. A protrusion 513a that can be engaged with any row of the lock holes 213a is provided at the front edge. The engaging member 513 is placed in one of a lockable state in which it is elastically urged forward by the urging mechanism 8a and a lock release state (not shown) in which it is elastically urged rearward. The urging mechanism 8a has a backward tilt lock operation lever 514 that can be moved between the lock position Pa and the lock release position Pb, and the engagement member 513 when the rear tilt lock operation lever 514 is at the lock position Pa. And a torsion coil spring 515 that elastically biases the engaging member 513 backward when the backward tilt lock operating lever 514 is in the unlocking position Pb. The torsion coil spring 515 has one end supported by the backward tilt lock operation lever 514 and the other end supported by the engagement member 513. The rear tilt lock operation lever 514 is moved from the lock position Pa to the unlock position Pb. When moving to the position, the urging direction with respect to the engaging member 513 is reversed through the thought point. The biasing mechanism 8a in this embodiment biases the engaging member 513 forward when the backward tilt lock operation lever 514 is at the lock position Pa, and when the rear tilt lock operation lever 514 is at the unlock position Pb. Is configured to urge the engaging member 513 backward.

  The lower back support cover 52 is provided below the seating surface 4a, and has an attachment portion 521 to which a disaster response product set B, which is an article suspended and supported by a support member E such as a belt, can be attached. I have. The attachment portion 521 includes a vertical wall 521a that can be attached to the side surface of the storage member B2 in the disaster response product set B and a top wall 521b that is a horizontal portion that can be attached to the upper surface side of the storage member B2. . A space sp for arranging the disaster response product set B is formed mainly with the standing wall 521a and the top wall 521b. That is, the attachment portion 521 is disposed on the back support rod 5, the vertical portion is a standing wall 521 a formed on the back support rod 5, and the lateral portion is formed on the back support rod 5. It is the top wall 521b.

  Specifically, the lower back support cover 52 includes a bottom wall 522 that covers a part of the lower frame 511 of the support base 2 and the back support 5 from the lower side, and a rear end of the bottom wall 522. The standing wall 521a rising upward, the top wall 521b extending rearward from the upper end of the standing wall 521a, and the left and right side walls 524 integrally provided on both sides of the top wall 521b, the standing wall 521a, and the bottom wall 522 are provided. The top wall 521b and the standing wall 521a form an L-shaped part in side view. Thus, the space sp surrounded by the attachment portion 521 that is an attachment portion of the article including the standing wall 521a and the top wall 521b is formed behind the support base 3, and the space sp A disaster response product set B, which is an article, is arranged in a state of being attached to the top wall 521b and the standing wall 521a. The disaster response product set B is a storage member B2 in which disaster response products such as a head protection hat and a flashlight are provided for emergency response when a disaster occurs.

  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 is a nut portion of the lower back support cover 52 through a bolt insertion hole (not shown). It is attached to the back support rod main body 51 by a bolt (not shown) screwed to 521c.

  The backrest 6 includes a backrest main body 61 and a back outer shell 62 disposed after the backrest main body 61.

  The backrest body 61 is formed by arranging a back cushion (not shown) in front of the back inner shell 612 having a shell shape. The backrest main body 61 includes a back inner shell 612, a back cushion attached to the front surface of the back inner shell 612, and an exterior material 613 that is a tension covering the back cushion and the peripheral edge of the back inner shell 612. It has.

  As shown in FIG. 9, the back inner shell 612 has a lower outer shell mounting region 612a exposed to the outside with the back outer shell 62 removed, and extends above the lower outer shell mounting region 612a and the back surface. It is made of a synthetic resin having an upper extension region 612b whose side is covered with an exterior material 613. The lower outer shell attachment region 612a is surrounded by the surrounding wall ya. A large number of vertical ribs yb and horizontal ribs yc are provided in a lattice pattern on the back side of the lower outer shell mounting region 612a, and the upper and lower back support rod mounting portions are located at positions avoiding the vertical ribs yb and the horizontal ribs yc. A plurality of boss portions ye for attaching yd and the peripheral edge portion of the back outer shell 62 are provided. The upper extension region 612b includes a large number of vertical ribs yg and horizontal ribs yh on the back side, and the front and back surfaces are covered with an exterior material 613.

  A back outer shell 62 that engages with the back inner shell 612 is disposed after the backrest main body 61. In this embodiment, the back outer shell 62 exhibits a function as a decorative member for preventing the upper part of the back support rod 5 and the middle part and the lower part of the back inner shell 612 from being exposed to the outside.

  The back outer shell 62 includes a shell-shaped back outer shell main body 621 and a handle portion 622 that is disposed on an upper portion of the back outer shell main body 621 and can be gripped by a user. The back outer shell 62 includes a left side portion 621x located on the left side in the upper portion and attached to the backrest body 61, and a right side portion 621y located on the right side in the upper portion and attached to the backrest body 61, The exterior member 613 of the backrest body 61 is exposed between the left part 621x and the right part 621y, and the handle part that the user can grip between the left part 621x and the right part 621y. Is arranged. That is, the back outer shell 62 has the left side portion 621x and the right side portion 621y in the upper part brought into contact with the backrest body 61, and the backrest body 61 is exposed to the outside between the left side portion 621x and the right side portion 621y. A back outer shell main body 621 formed so as to be obtained, and a handle portion 622 disposed between the left side portion 621x and the right side portion 621y that can be gripped by a user. In this embodiment, the back outer shell main body 621 and the handle portion 622 are integrally formed of synthetic resin.

  Here, “attaching” the left side 621x and the right side 621y of the back outer shell main body 621 to the backrest main body 61 means between the left side 621x and the backrest main body 61, and between the right side 621x and the backrest. It means that it is attached in such a manner that the space is not visually recognized between itself and the main body 61. In other words, “attaching” includes a configuration in which appearance can be visually recognized in an attached state.

  The back outer shell main body 621 has a side edge and a lower edge shape substantially corresponding to a side edge and a lower edge shape of the backrest main body 61 so as to be attached to the back side of the backrest main body 61. A peripheral wall 621 a that fits outside the surrounding wall ya of the back inner shell 612 is provided at the periphery. The upper part of the back outer shell main body 621 has a shape in which a central portion in the left-right direction is recessed in a rear view, and is attached to the back surface of the backrest main body 61 on which an exterior material 613 is stretched. A convex portion 621e that engages with the boss portion ye is formed at a portion corresponding to the boss portion ye of the back inner shell 612 in the back outer shell main body 621.

  The back outer shell 62 is attached to the backrest main body 61 by engaging the convex portion 621e of the back outer shell main body 621 with the boss portion ye of the back inner shell 612 and, if necessary, the back outer shell main body with a screw (not shown). This is done by screwing 621 and the back inner shell 612 together. For example, the left side portion 621x and the right side portion 621y attached to the backrest main body 61 are screwed to the back inner shell 612 with screws (not shown) to cover the screw heads of the screws exposed on the outer surfaces of the left side portion 621x and the right side portion 621y. It is conceivable to conceal it by, for example.

  The left side portion 621x and the right side portion 621y are flat plate-like portions arranged so as to be visually recognized as being attached to the backrest body 61. In this embodiment, the left side portion 621x and the right side portion 621y are arranged. The inner portion of the handle is continuous with the handle portion 622. On the other hand, between the left side 621x and the right side 621y, there is formed a portion where no resin meat exists, that is, an exposed inducing portion 621b which is a non-meat portion, and the backrest body via the exposed inducing portion 621b. 61 of the exterior material 613 can be exposed to the outside. In other words, the backrest main body 61 includes an exposed portion 613 a that is a part of the exterior material 613 that is exposed to the outside via the exposure raising portion 621 b of the back outer shell 62.

  The handle portion 622 is formed integrally with the back outer shell main body 621. The handle portion 622 includes a handle portion main body 622a extending in the left-right direction, and left and right handle portion side portions 622b extending forward from left and right side edges of the handle portion main body 622a and having front ends connected to the back outer shell main body 622a. I have. The handle portion 622 has a U-shape that is open forward in plan view, and the user inserts a finger to grip the handle portion 622 through an area surrounded by the handle portion main body 622a and the handle portion side portion 622b. The possible finger insertion space sk is used. The handle portion 622 has a shape protruding rearward from the outer surface of the back outer shell main body 621 in a side view.

  The handle portion 622 is installed between the left side portion 621x and the right side portion 621y of the back outer shell main body 621 so that the exposure inducing portion 621b and the exposed portion 613a are not visible in the rear view as shown in FIG. It is configured. In other words, the handle portion 622 is provided between the left side portion 612x and the right side portion 612y so as to hide the exposed portion 613a of the backrest main body 61 in the rear view.

  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 FIGS. 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-rocking mechanism SY, the seat 4 is tilted at a certain rate in conjunction with the tilting.

  The tilt reaction force generation mechanism 9 is provided in the support base 2, and includes a pair of springs S, a base-side spring retainer 91 that holds the base ends of the springs S, and a tip of the spring S. A front end side spring retainer 92 that holds the portion, and the urging force of the spring S is transmitted to the front shaft j1 via the front end side spring retainer 92 to thereby cause the seat 4 and the backrest 6 to move. It is urged in the use position (U) direction. And the magnitude | size of the urging | biasing force by the said spring S can be changed by changing the position of the said base end side spring retainer 91 by the reaction force adjustment mechanism 93. FIG. The front end side spring retainer 92 includes a groove 921 having a semicircular cross section on the front surface, and the groove 921 holds the intermediate portion of the front shaft j1. The reaction force adjustment mechanism 93 is disposed with its axis oriented in the left-right direction, and rotates the reaction force adjustment lever 94 to rotate integrally with the reaction force adjustment lever 94 around the axis, An advancing / retracting member 95 that is screwed to the feed screw member 941 and reciprocates in the left / right direction in accordance with forward / reverse rotation of the feed screw member 941, and the advancing / retreating operation of the advancing / retreating member 95 in the left / right direction is the base end spring It has a normal configuration including a cam mechanism 96 that converts the retainer 91 to a change in position in the front-rear direction.

  The synchro-rocking mechanism SY supports the front end side of the seat support member 3 that supports the seat 4 to the support base 2 via the front shaft j1 so as to be movable back and forth, and the rear end side of the seat support member 3 to the rear shaft j2. It is supported in the middle of the back support rod 5 through. According to this synchro-rocking 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 the retreat operation while sinking the rear end side. Thus, 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 on the support base 2. The chair body C includes a front shaft j1 that is a reciprocating member that reciprocates in accordance with a synchro-rocking operation of the seat 4 and the backrest 6, and a regulating member 25 that locks the front shaft j1 at the initial position p2. And the front shaft j1 moves from the assembly position p1 where the urging force of the spring S becomes zero to the locking position p3 via the initial position p2 before the restricting member 25 is attached. In other words, the restricting member 25 can be retrofitted with the front shaft j1 moved to the locking position p3 side with respect to the initial position p2. That is, a restricting member attaching portion 262 for retrofitting the restricting member 25 is provided on one end side of the long hole 261.

  More specifically, a mounting hole having a long hole shape is formed in the front end portion of the support base 2, and a long hole 261 for guiding the front shaft j1 so as to reciprocate in the front-rear direction is provided in the mounting hole. The resin bush 26 is provided. The restriction member mounting portion 262 is formed on the front end side of the bush 26 so as to be continuous with the long hole 261. The long hole 261 has a width corresponding to the front shaft j1, and the restricting member mounting portion 262 has an opening width larger than the width of the long hole 261. The restricting member 25 is a shaft having an irregular cross section that can be fitted into the restricting member mounting portion 262, and includes a locking portion 251 for locking the front shaft j1 at a portion facing the long hole 261. Yes. During normal use, the front shaft j1 reciprocates in the front-rear direction between an initial position p2 contacting the locking portion 251 of the restricting member 25 and a rear locking position p3. The restricting member 25 has a positioning flange 252 at the inner end thereof, and is provided with a knob portion 253 that can be gripped with fingers by the inside of the flange 252. It can be retrofitted by inserting it into the regulating member mounting portion 262 from the inside.

  A retaining mechanism 27 is provided between the restricting member 25 and the bush 26 so as to engage with each other in a state in which the restricting member 25 is inserted to a proper position where the flange 252 contacts the bush 26. It has been. The retaining mechanism 27 includes an engaging portion 254 provided on the restricting member 25 side and an elastic claw 263 provided on the bush 26 side and elastically engaging with the engaging portion 254 by using the insertion operation of the restricting member 25. It is equipped with. The bush 26 and the restricting member 25 that form the long hole 261 are respectively provided on the left and right side walls 212 of the support base 2 so as to correspond to both ends of the front shaft j1.

  In a stage before both the restricting members 25 are mounted, the front shaft j1 can be present at a position where the front shaft j1 enters the restricting member mounting portion 262, that is, at an assembly position p1 where the urging force of the spring S is zero. It becomes. Therefore, the front shaft j1 is inserted into the assembly position p1 in the previous stage where the restricting member 25 is not attached and is brought into contact with the tip side spring retainer 92 in an unloaded state, and then the front shaft is tilted while the backrest 6 is tilted backward. j1 is passed through the initial position p2 and moved in the locking position p3 direction, and the restricting members 25 are mounted on the restricting member mounting portions 262 from the inside in this state. If the backward pressing force against the backrest 6 is released in this state, the front shaft j1 is moved forward by the urging force of the spring S and is locked at the initial position p2 where it abuts against the regulating member 25. . At the initial position p2, 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 are stationary at the use position (U).

  The chair body C in this embodiment includes a front shaft j1 that is a reciprocating member that performs a reciprocating motion in accordance with a synchro-rocking operation of the seat 4 and the backrest 6, and substantially the entire operating range of the front shaft j1. A resin-made resistance member 28 is provided which clamps the front shaft j1 from two opposite directions and gives frictional resistance to the reciprocating motion.

  The resistance member 28 connects the pinching portion 281 that forms a pair holding the front shaft j1, the first connecting portion 282 that connects one ends of these pressing portions, and the other ends of the pressing portion 281. It is an annular thing provided with the 2nd connection part 283. The resistance member 28 is configured such that the separation dimension w2 between the clamping parts 281 is set smaller than the diameter w1 of the front shaft j1, that is, the outer diameter dimension w1 of the front shaft j1 in the clamping direction. The both clamping parts 281 are elastically pressed against the resistance member 28 by a repulsive force. The separation distance w2 between the clamping parts 281 is set to about three-fifths of the outer dimension w1 of the front shaft j1. The resistance member 28 is provided integrally with the bush 26. In the resistance member 28, the first and second connecting portions 282 and 283 are integrated with the bush 26, and most of the clamping portions 281 are separated from the bush 26 through slits. . More specifically, both the pinching portions 281 are leaf spring-shaped, and the first connecting portion 282 has a U-shape in a side view connecting the ends of both the pinching portions 281. It is. The second connecting portion 283 also serves 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 formed using POM (polyacetal) resin.

  The chair body C in this embodiment has the following configuration in addition to the structure described above. The backrest 6 of the chair body C has a wide shape that is curved so that both end portions surround both sides of the seated person with the lower half 6b tilted slightly forward. The upper half 6a is inclined slightly rearward from the lower half 6b through a bent portion 6c bent in a dogleg shape in a side view. The upper half 6a has a narrower width than the lower half 6b. The upper surface 6s of the lower half 6b that extends 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 includes an armrest body 71 having a U-shape that is opened rearward and a mounting arm 72 that attaches the armrest body 71 to the seat outer shell 41 of the seat 4. Is set so as to be substantially continuous with the upper surface 6s of the lower half 6b of the backrest 6. Further, 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 product set B is mounted on the chair body C thus formed. In other words, the chair A is provided with a disaster response product that can be used in a disaster, and includes the chair body C and the disaster response product set B.

  The disaster response product set B is a storage member B2 in which the disaster response product substantially corresponding to the content of one person is stored, and an attachment portion that is an attachment portion for mounting the disaster response product set B 521 is arranged on the back support rod 5. That is, the disaster response article is arranged at a position below the seat surface 4 s of the seat 4. The disaster response product set B is suspended and supported by the support member E with respect to the back support rod 5 in a state of being attached to the attachment portion 521. The support member E in this embodiment is mainly composed of a belt-shaped member having a hook-and-loop fastener that can be attached to and detached from the end portion. The disaster response product set B is suspended and supported.

  As described above, the chair A according to the present embodiment is engaged with the backrest body 61 in which the back cushion is disposed in front of the back inner shell 612 and the back inner shell 612 disposed after the backrest body 61. A backrest 6 having a back outer shell 62 and a leg 1 having a caster 11 at a lower end for supporting the backrest 6 are provided. In the chair A, the back outer shell 62 causes the left side 621x and the right side 621y in the upper part to be brought into contact with the backrest main body 61 and the backrest main body between the left side 621x and the right side 621y. A back outer shell main body 621 formed so that 61 can be exposed to the outside, and a handle portion 622 disposed between the left side portion 621x and the right side portion 621y that can be gripped by a user. For this reason, the chair excellent in the freedom degree of design for forming the space for inserting a finger so that a user may grasp handle part 622 can be provided.

  That is, since the back outer shell main body 621 is formed so that the back main body 61 can be exposed to the outside between the left side 621x and the right side 621y, a space corresponding to the thickness dimension of the back outer shell main body 621. Can be used as a space for inserting the user's fingers.

  In addition, since the back outer shell 62 is engaged with the back inner shell 612 of the backrest main body 61, even if the back outer shell 62 receives a certain external force by the user holding the handle portion 622, the back outer shell 62 is It becomes difficult to detach from the backrest main body 61 which is a strength member that is connected to the support 5 and can support the load of the seated person, and the entire chair A can be suitably moved.

  Further, the back outer shell main body 621 has an excellent degree of freedom in design for connecting to the backrest main body 61 because the left side 621x and the right side 621y at the top thereof are brought into contact with the backrest main body 61. Thus, the back outer shell 62 having the handle portion 622 can be suitably supported with respect to the backrest main body 61.

  Since the handle portion 622 is integrally formed with the back outer shell main body 621, the handle portion 622 has excellent design flexibility for increasing the strength of the handle portion 622 and can contribute to the suppression of the number of parts. Become.

  Since the upper portion of the back outer shell main body 621 has a shape in which the central portion in the left-right direction is recessed in the rear view, the backrest main body 61 can be exposed to the outside between the left side portion 621x and the right side portion 621y. It becomes easy to form.

  The present invention is not limited to the embodiment described in detail above.

  In the above-described first embodiment, the handle portion is formed integrally with the back outer shell main body. However, the handle portion is not limited to this, and the handle portion is the back outer shell. It may be formed separately from the main body.

  Here, in FIG.22 and FIG.23, the backrest 6 of the chair A which is 2nd embodiment is simplified and shown. This figure is for explaining another embodiment of the back outer shell 62, and shows the backrest body 61 in a simplified manner. Further, other components such as legs and seats shown in the first embodiment are omitted. In the second embodiment, the same or corresponding components as those of the above-described embodiment will be described with the same reference numerals, and detailed description thereof will be omitted or simplified.

  The backrest 6 of the chair A according to this embodiment has a back outer shell 62 that engages with the back inner shell 612 of the backrest body 61. The handle portion 622 of the back outer shell 62 is formed separately from the back outer shell main body 621. In this embodiment, left and right attachment portions 622c extending outward from the front end of the handle portion side portion 622b in the handle portion 622 are attached to the back inner shell 612 of the backrest main body 61 by screws v4. The left and right attachment portions 622c are integrally formed with the handle portion main body 622a and the handle portion side portion 622b by resin.

  The left and right attachment portions 622 c are attached to the backrest main body 61 on the front surface side and attached to the front surface of the back outer shell main body 621 on the back surface side. That is, the left and right attachment portions 622c are covered with the back outer shell main body 621 whose upper ends are recessed so as to avoid the handle portion main body 622a and the handle portion side portion 622b. Even with such a configuration, the intended purpose can be achieved.

  Next, in FIGS. 24 and 25, the backrest 6 of the chair A which is the third embodiment is shown in a simplified manner. This figure is for explaining another embodiment of the back outer shell 62, and shows the backrest body 61 in a simplified manner. Further, other components such as legs and seats shown in the first embodiment are omitted. Note that in the third embodiment, the same or corresponding components as those of the above-described embodiment will be described with the same reference numerals, and detailed description thereof will be omitted or simplified.

  The backrest 6 of the chair A according to this embodiment has a back outer shell 62 that engages with the back inner shell 612 of the backrest main body 61. Similarly to the second embodiment, the handle portion 622 of the back outer shell 62 is formed separately from the back outer shell main body 621. In this embodiment, left and right attachment portions 622c extending outward from the front end of the handle portion side portion 622b in the handle portion 622 are attached to the back inner shell 612 of the backrest main body 61 by screws v4. The left and right attachment portions 622c are integrally formed with the handle portion main body 622a and the handle portion side portion 622b by resin. The third embodiment includes an exposure opening 621f having a rectangular shape for exposing the backrest main body 61 to the outside on the upper portion of the back outer shell main body 621. The back outer shell main body 62 includes a left portion 621x and a right portion 621y on the left and right of the opening 621f for exposure. That is, the handle portion 622 attached to the back inner shell 612 of the backrest main body 61 causes the handle portion main body 622a and the handle portion side portion 622b to protrude rearward through the exposure opening 621f of the back outer shell main body 621. ing. The left and right attachment portions 622c of the handle portion 622 are covered with left and right opening edges that form the exposure opening 621f. Even with such a configuration, the intended purpose can be achieved.

  Then, in FIG.26 and FIG.27, the chair A which is 4th embodiment is shown. Note that in the fourth embodiment, the same or corresponding components as those of the above-described embodiment will be described with the same reference numerals, and detailed description thereof will be omitted or simplified.

  The backrest 6 of the chair A according to the fourth embodiment has a back outer shell 62 that engages with the back inner shell 612 of the backrest main body 61. As in the first embodiment, the handle portion 622 of the back outer shell 62 is formed integrally with the back outer shell main body 621. In this embodiment, an opening 623 for inserting a finger is formed below the handle portion 622. The handle portion 622 has a curved shape so as to protrude rearward, and both end portions are connected to the back outer shell main body 621. The finger insertion opening 623 is formed over the handle 622, the left side 621x and the right side 621y. Even with such a configuration, the intended purpose can be achieved.

  Each embodiment mentioned above is an illustration to the last, and a various deformation | transformation is possible in the range which does not deviate from this invention besides. For example:

  Various shapes can be adopted for the shape of the back inner shell and the back outer shell constituting the backrest body, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

  There are various modes of engagement between the back inner shell and the back outer shell, and the present invention is not limited to the above-described embodiment. For example, a hook having a hook-shaped portion may be provided on one or both of the back inner shell and the back outer shell, and the hook may be pressed and engaged with the other. Alternatively, the back inner shell and the back outer shell may be brought into close contact with each other using a string-like member such as a wire or a resin string, a band, or the like.

  The back outer shell may be connected to the back support rod and function as a strength member having a strength for receiving the load of the seated person.

  The chair may not have a mechanism for tilting the backrest backward or a mechanism for tilting the seat and the backrest in conjunction with each other. Further, there may be no front-rear slide mechanism for the seat receiver of the seat body.

  The shape of the handle portion is not limited to that of each of the above-described embodiments, and various forms can be adopted in consideration of the user's suitable touch feeling and the like.

  A portion of the backrest main body where the exposed portion is present may be recessed forward to obtain a large space for inserting fingers between the handle portion and the backrest main body.

  The middle part of the handle part extending in the left-right direction may be thinner than the left and right side parts so as to obtain a large space for inserting fingers.

  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 spirit of the present invention.

A ... Chair 6 ... Backrest 61 ... Backrest main body 62 ... Back outer shell 612 ... Back inner shell 621 ... Back outer shell main body 622 ... Handle portion 621x ... Left side 621y ... Right side

Claims (5)

A backrest having a backrest body in which a back cushion is arranged in front of the back inner shell, and a back outer shell engaged with the back inner shell arranged behind the backrest body, and for supporting the backrest A chair comprising a leg having a caster at the lower end,
The back outer shell is formed so that a left side portion and a right side portion in an upper portion are brought into contact with the backrest main body and the backrest main body can be exposed to the outside between the left side portion and the right side portion. A chair comprising a main body and a handle portion that is disposed between the left side portion and the right side portion and can be gripped by a user. The chair according to claim 1, wherein the handle portion is formed integrally with the back outer shell main body. The chair according to claim 1, wherein the handle portion is formed separately from the back outer shell main body, and the attachment portion of the handle portion is attached to the backrest main body and covered with the back outer shell main body. The chair according to claim 1, 2, or 3, wherein an upper portion of the back outer shell main body has a shape in which a central portion in the left-right direction is recessed in a rear view. An exposure opening for exposing the backrest main body to the outside is provided at an upper portion of the back outer shell main body, and the left side and the right side are arranged on the left and right of the exposure opening. A chair according to 1, 2 or 3.

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