JP4908826B2 - Reclining chair - Google Patents

Description

  The present invention relates to a reclining chair that allows the entire seat body to move backward while the rear portion of the seat body tilts rearward and downward in conjunction with the back tilt of the backrest.

This type of reclining chair is described in Patent Document 1, for example, and is well known.
JP-B-2-24527

  In the reclining chair described in the above-mentioned patent document, a pivotally attached portion to a backrest support saddle (backrest frame) at the rear of the seat is provided below and horizontally on the seat, so that the backrest support Since the radius of rotation from the center of movement is relatively small, the amount of rearward downward movement of the seat is small relative to the amount of back tilt, and a comfortable sitting comfort cannot be obtained.

  In addition, the left and right dimensions of the frame that supports the seat and the distance between the left and right backrests that are pivotally attached to the rear end thereof are considerably smaller than the left and right dimensions of the seat and the back, respectively. Since the center part in the left-right direction is supported by the underframe and the backrest support rod, both sides of the seat body and the backrest may wobble in the vertical direction and the front-rear direction, respectively.

  The present invention has been made in view of the above-mentioned problems, and it is possible to improve the sitting comfort by increasing the amount of backward movement of the seat relative to the amount of backward inclination of the backrest, It is an object of the present invention to provide a reclining chair that can stably support the body and the backrest.

According to the present invention, the above problem is solved as follows.
(1) The inward pivot portion of the lower end of the pair of left and right backrest support rods facing the up and down direction against the support base provided at the upper end of the leg body is opposed to the forward biasing means provided at the support base. The backrest support rod is pivotally attached so that it can be rotated backwards, and the backrest attached to both the backrest support rods is tilted rearward so that it can be moved back and forth by the support base in conjunction with it. In a reclining chair in which the rear portion of the supported seat is tilted rearward and downward, a pair of left and right support pieces are provided on the left and right sides of the rear portion of the seat, and the upper ends of the two support pieces are provided by supporting shaft of the seat body rear lateral inward than the seat body in the right and left backrest support rod which is to face the vertical direction in both sides it is provided in the portion located above the the pivotally by pivoting, the pivot portion of the backrest support rod of the support piece, the seat support And outward from both sides of the part.

( 2 ) In the above item (1 ) , a seat support frame that gradually expands outward toward the front is projected from the front of the support base, and the upper surface of the left and right front end portions The lower surfaces of both side portions are supported so as to be slidable in the front-rear direction by guide means provided on the opposing surfaces.

( 3 ) In the above item ( 2 ), the guide means is provided on either one of the seat support frame and the seat body, and is provided on the other side of the guide member having a pair of left and right guide grooves. It shall consist of the slide member which faces the front-back direction slidably fitted by the groove | channel.

( 4 ) The backrest according to any one of the above items (1) to ( 3 ), wherein the backrest is formed of a flexible synthetic resin, and the lower left and right ends thereof are fixed to the inner end of the support shaft. Attach to support member.

( 5 ) In any one of the above items (1) to ( 4 ), the forward biasing means includes a left-right outer cylinder that is provided in a non-rotatable manner inside the support base, and a loosely-rotatably movable cylinder. A rubber torsion unit comprising a fitted inner cylinder and a torsion rubber fixed between the outer cylinder and the inner cylinder, and a pivot portion at the lower end of the right and left back support rods on both side ends of the inner cylinder Are connected so that they cannot rotate relative to each other.

( 6 ) In the above item ( 5 ), both end portions of the inner cylinder of the rubber torsion unit are extended outward from the outer cylinder, and the pivot portions of the lower end of the backrest support rod are fitted to both ends thereof, They are connected by pins.

( 7 ) In the above item ( 5 ) or ( 6 ), an upward protrusion is provided at the center of the inner upper surface of the support base, and the lower surface of the outer cylinder is fitted to this protrusion.

According to the first aspect of the present invention, the pivotal support portion of the support piece at the rear portion of the seat body to the backrest support rod is located above the seat body, from the pivot center of the pivot portion at the lower end of the backrest support rod. Since the rotation radius is increased with a large separation, the amount of rearward downward movement of the backrest support rod, that is, the amount of backward inclination of the backrest attached thereto increases, and the seating comfort is improved.
In addition, since the pivotal support portion of the support piece to the backrest support rod is outward from both side surfaces of the seat rear portion, the rear portion of the seat body can be stably supported by the left and right backrest support rods. .

According to invention of Claim 2 , the front part of a seat body can be stably supported by the seat support frame so that sliding is possible in the front-back direction.

According to the third aspect of the invention, the front portion of the seat body can be stably supported so as to be slidable only in the front-rear direction by the guide means having a simple structure.

According to the fourth aspect of the present invention, the upper part of the backrest is easily bent backward about the backrest support member fixed to the support shaft, and the backrest support collar rotates rearward in conjunction with it. At the same time, the seat body also moves rearward and downward, so that the back fits back and a comfortable sitting comfort is obtained.

According to the fifth aspect of the present invention, since the vertical and longitudinal dimensions are small and the structure is simple as compared with the biasing means such as a gas spring, the support base is downsized and the appearance is improved.

According to the sixth aspect of the invention, the connecting operation between the inner cylinder of the rubber torsion unit and the pivot portion at the lower end of the backrest support rod becomes extremely easy.

According to the seventh aspect of the invention, the rubber torsion unit can be easily positioned and attached to the inner upper surface of the support base, and the outer cylinder can be easily prevented from rotating.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an embodiment of a reclining chair of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is an exploded perspective view of the main part.

  The chair (1) is composed of a leg (4) having five leg rods (3) facing the radial direction with a caster (2) attached to the tip, and a gas which is erected at the center and contained in the leg. A leg column (5) that can be expanded and contracted by a spring (not shown) and a support base (6) fixed to the upper end of the leg column (5) are provided.

  At the front end of the support base (6), a seat support frame (7) having a frame shape in plan view, which faces obliquely upward and extends obliquely outward, is integrally connected, and the support base (6 As shown in FIG. 3 (only one is shown because it is bilaterally symmetrical) on both side portions slightly behind the pedestal (5) in FIG. A pair of left and right backrest support rods (8) and (8) bent in an inward L shape are provided with a pivot portion (8a) at the inner end of the inward bent portion inside the support base (6). By being connected to a rubber torsion unit (53) which will be described later, it is attached so as to be able to turn in the front-rear direction in a state where a forward biasing force is applied.

  As shown in FIG. 4, a pair of guide members (9) having outwardly U-shaped guide grooves (9a) (9a) on the left and right side surfaces on the upper surfaces of the left and right front ends of the seat support frame (7). (9) is fixed by bolts (10), and both guide members (9) have a seat plate (13) made of synthetic resin in which a cushion material (12) is stretched on the upper surface of the seat body (11). A pair of slide members (14) facing the front-rear direction integrally formed on the lower surfaces of both side portions of the front end portion of the front end face the front-rear direction of the bottom groove-like slide grooves (14a), and the guide grooves (9a) By being slidably fitted to each other, it is slidably supported in the front-rear direction.

As will be described later, the seat body (11) moves so as to incline backward and downward, so that it does not interfere with it, between the guide groove (9a) and the slide groove (14a). The required gap is provided.
On the contrary, a slide member (14) may be provided on the seat support frame (7) side, and a guide member (9) may be provided on the seat plate (13) side.

  The rear end of the seat plate (13) in the seat body (11) is rotatably supported by the left and right back support rods (8) as follows.

  As shown in the exploded perspective view of FIG. 3 and the enlarged vertical sectional view of FIG. 5 (only one is shown for left-right symmetry), the left and right sides of the rear end of the seat plate (13) are opened inside and downward. A pair of upward projections (16) having an upward concave hole (15) is integrally erected, and the outer surface of the outer side piece (16a) has a vertical direction with an upper end opened. An inward concave fitting groove (17) is formed.

  The fitting groove (17) has a lower end portion of a metal plate-like seat support bracket (18) that complements the fitting groove (17), and two upper and lower through holes (19) formed in the side piece (16a). The bolt (20) is inserted from the outside into the through hole (22) of the fixing plate (21) made of hard synthetic resin inserted from below into the concave hole (15). The upper end protrudes upward from the upper end of the upward projection (16) by screwing into a nut (24) fitted in a hexagonal recess (23) formed on the inner surface. It is fixed in the state.

  The upward projection (16) and the seat support bracket (18) constitute a support piece (25) that supports the rear end of the seat (11) (see FIGS. 1 and 2).

  The lower end of the fixing plate (21) is in contact with the lower surface of the outer side piece (16a) of the upward projection (16), and the lower end of the recessed hole (15) is connected to the lower end of the seat plate (13). A closing piece (21a) that is well-dressed to be continuous with the lower surface is integrally provided continuously.

  (26) is a synthetic resin cover that covers the outer surface of the seat support bracket (18) and the head of the bolt (20). The shaft-shaped protrusion (26a) projecting from the inner surface of the cover is made of a seat support bracket. By being fitted in the mounting hole (27) between the upper and lower through holes (19) in (18), it is fixed so as to be fitted in the fitting groove (17).

  A support cylinder (28) facing in the left-right direction and closed on the inner surface is provided at the upper end of the backrest support rod (8) positioned above the upper surface of the rear end of the seat (11). The projecting shaft (28a) is fixed to the backrest support rod (8) by fitting and welding it. On the inner surface of the support tube (28), the support shaft (29) and the square shaft (30) are integrally projected so as to be coaxial, and the support shaft (29) is provided on the seat plate (13). The fixed seat support bracket (18) pivots vertically by pivotally fitting a circular hole (31) drilled in its upper end via a pair of left and right hooked bushes (32) (32) Supported as possible.

  The outer peripheral surface excluding the lower portion of the seat support bracket (18) has a shape that matches the outer peripheral surface of the support tube (28), thereby preventing a step between them.

  The angular axis (30) is formed on the outer surface of a shaft-like back support member (33) having the same outer diameter as the support cylinder (28), and a rectangular hole (30) is complementary to the angular axis (30). 34), and the bolt (35) inserted from the outside into the support tube (28) passes through the through hole (36) of the support shaft (29) and the square shaft (30) to support the backrest. The support tube (28) and the backrest support member (33) are formed between the facing surfaces of the support tube (28) and the back support member (33) by being screwed into the screw (37) to be formed on the back surface of the square hole (34) in the member (33). The left and right hooked bushes (32) and the upper end of the seat support bracket (18) are fixed to each other so as to be sandwiched in a rotatable manner.

(38) is a cap fastened to the opening on the outer surface of the support tube (28).
On the upper surface of the backrest supporting member (33), a square-axis-shaped back frame mounting rod (39) is erected.

  The backrest (40) is composed of a substantially square frame-like back frame (41) and an inner back plate (42) surrounded by the back frame (42). ing. The lower part of the left and right side frames (41a) and (41a) in the back frame (41) is slightly expanded outward, and the attachment portion (41b) to the backrest support rod (8) is directed downward at the lower end. It is connected to.

  On the entire surface of the back plate (42), a number of vertically slit-like openings (43) are perforated in a regular arrangement at regular intervals in the vertical and horizontal directions, and when the seated person's back is pressed against it, the vertical direction The back plate (42) as a whole bends backward with the opening (43) lined up in the center.

Further, the thickness of the back frame (41) and the back plate (42) is thicker at the lower side, and gradually becomes thinner toward the upper side, so that the upper side is easily bent backward.
Further, the thickness of the back plate (42) is thick at the left and right sides, and gradually becomes thinner toward the center, and the center is more easily bent backward.

  As shown in FIG. 5, a rectangular cross section having an opening at the lower end is formed on the attachment portion (41 b) at the lower end of the side frame (41 a) of the back frame (41), which is complementary to the back frame attachment rod (39) The mounting hole (44) is formed in the vertical direction.

  After the back frame mounting rod (39) is properly fitted into the mounting hole (44), as shown in FIG. 3, the concave groove (45) formed on the outer surface of the side frame (41a) and facing in the vertical direction. The lower mounting portion (46a) connected to the rear end of the armrest (46) is fitted to the lower end portion of the armrest, and the upper and lower two holes drilled in the back surface of the concave groove (47) on the outer side surface thereof. Insert the bolt (49) inserted into the through hole (48) through the two upper and lower through holes (50) on the back surface of the concave groove (45) in the side frame (41a), and insert it into the mounting hole (44). The fitted back frame mounting rod (39) is screwed into two upper and lower female screw holes (51) facing in the left-right direction and tightened.

  Accordingly, the back frame mounting rod (39) which is substantially integrated with the back support rod (8), the back frame (41) in the back frame (40), and the armrest (46) are two bolts. Tightened together by (49).

  It should be noted that the lower end of the downward mounting portion (46a) of the armrest (46) and the lower end of the side frame (41a) are respectively provided on the upper surface of the support tube (28) at the upper end of the backrest support rod (8) and the backrest support member. An upward arc-shaped fitting recess (52) (52) to be fitted to the upper surface of (33) is formed so as to improve the appearance after the attachment.

  When the backrest (40) tilts backward about the pivot (8a) of the backrest support collar (8) that supports it, the lower surface of the front end is supported by the support base (6) so that it can move in the front-rear direction. And a rear end portion of which is supported by a support shaft (29) facing the left-right direction of the support tube (28) fixed to the upper end of the backrest support rod (8) via a seat support bracket (18). The body (11) moves backward such that its rear end portion is inclined downward and downward.

  At this time, the rear end portion of the seat body (11) is pivotally supported by the support shaft (29) at the upper end of the backrest support rod (8) above the upper surface of the seat body (11). Since the pivot radius (8a) is far away from the pivot (8a), which is the center of rotation of the tilt support rod (8), and the radius of rotation becomes large, the amount of rotation of the back support rod (8) to the rear, that is, The amount of rearward and downward movement of the seat body (11) can be increased with respect to the backward tilt amount, and the sitting comfort is improved.

  As shown in FIGS. 6 to 11, a rubber torsion unit that urges the backrest support rod (8) and the backrest (40) attached thereto forwardly as shown in FIGS. (53) is provided.

The rubber torsion unit (53) consists of an inner cylinder (54) facing left and right, an outer cylinder (55) having a larger diameter and shorter than that, and an inner cylinder (54) and an outer cylinder (55). It consists of a torsion rubber (56), which are firmly fixed to each other and integrally formed.
The lower half of the rubber torsion unit (53) is accommodated in a semicircular recess (57) formed at the center of the upper surface of the support base (6).

  Further, the lower surface of the outer cylinder (55) and the torsion rubber (56) are fitted to a projecting part (58) having a square cross section projecting upward from the bottom surface of the recessed part (57) to prevent rotation against the support base (6). And movement in the front-rear and left-right directions is prevented.

  At both left and right end portions of the inner cylinder (54), cylindrical pivot portions (8a) fixed by welding to the inner ends of the inwardly bent portions at the lower ends of the left and right back support rods (8) are externally fitted. These pins are connected so as not to rotate relative to each other by pins (59) that are press-fitted so as to penetrate the centers thereof vertically. As a result, the right and left back support rods (8) are given a biasing force by the torsional resistance generated when the inner cylinder (54) elastically deforms the torsion rubber (56) in the circumferential direction.

  The rubber torsion unit (53) is assembled in a state where an initial urging force is applied to the inner cylinder (54) so that the backrest support ridge (8) is always urged forward.

  As shown in FIG. 9, a bush (60) is fitted to the left and right pivot portions (8a), and the lower half of the bush (60) is formed on the upper surface of the support base (6). Fits into the circular recess (61) and the upper half fits into the lower surface of the fixture (63) fastened with the bolt (62) to the upper surface of the support base (6) sandwiching the groove (61) Thus, the pivot portion (8a) is rotatably held.

  Reference numeral (64) denotes a cover that comfortably covers the rubber torsion unit (53), the fixture (62), and the like fixed to the upper surface of the support base (6).

  As shown in FIG. 11, a flange plate (65) having a substantially semicircular shape in a side view is integrally formed on the upper half of the outer peripheral surface of the pivot portion (8a) in the left and right back support rods (8). A notch (66) having a concave shape in side view for insertion of the pin (59) is formed at the center in the circumferential direction.

  The front end stopper step (65a) of the flange plate (65) is fixed with a bolt (68) in a recess (67) on the front upper surface of the support base (6). It is always in contact with the upper surface of the contact member (69) aligned with the substantially same surface as the upper surface. At the time of this contact, the rear limit stopper step portion (65b) of the flange plate (65) is slightly separated from the contact portion (70) on the upper surface of the rear portion of the support base (6). A wedge-shaped gap (S) opening rearward is formed.

  When the front limit stopper step (65a) of the flange plate (65) comes into contact with the front contact member (69), the backrest (40) tilts forward to the maximum, and the rear limit stopper step When the part (65b) comes into contact with the rear contact part (70), the maximum amount of backward tilting of the backrest (40) is regulated.

  As shown in FIGS. 6, 10, and 11, the upper surface of the support base (6) behind the left and right flange plates (65) has a front half portion that can be engaged and disengaged with the wedge-shaped gap (S). The wedge-shaped lock portion (71) whose vertical dimension is gradually reduced toward the front has a front-rear guide groove (72) formed on the upper surface of the rear half thereof, and is arranged in the rear end portion of the fixture (63). By being fitted to the lower end portion of the downward guide piece (73) projecting on the side surface, the guide piece is placed so as to be slidable in the front-rear direction. The guide groove (72) and the guide piece (73) constitute guide means for the lock member (71).

  The inner side surfaces of the left and right lock members (71) are fitted with outwardly bent pieces (74a) at the rear end of a wire-like actuating spring (74) that curves upward in a convex arc shape. It is prevented from coming off by a projecting piece (75) provided on the upper surface of the base (6).

The inwardly bent piece (74b) at the front end of the actuating spring (74) protrudes greatly to the left side of the support base (6) rotatably held through the front end portions of the left and right fixtures (63). It is fitted to a pair of long rotating plates (77) that are fixed to the operating rod (76).
Thus, the operating spring (74) is attached so as to straddle the upper surface of the pivot portion (8a).

  The actuating spring (74) urges the lock member (71) to the rear always away from the gap (S), and also slightly urges the rotating plate (77) to always face upward. It is attached in a bent state.

  (78) is a handle operating handle attached to the left protruding end of the operating rod (76).

  The flange plate (65), the front contact member (69), the rear contact portion (70), the lock member (71), the operating spring (74), the operating rod (76) and the rotating plate ( 77) etc. constitute a backrest (40) locking device.

  When the operating handle (78) is not operated, as shown in FIG. 11, the lock member (71) is moved to the rear of the gap (S) by the biasing force of the operating spring (74). The front limit stopper step (65a) and the rear limit stopper step (65b) of the flange plate (65) are in contact with the front contact member (69) and the rear contact portion (70), respectively. Within range, the backrest (40) can be reclined in the front-rear direction.

  When the handle (78) is operated downward and the operating rod (76) and the rotating plate (77) fixed thereto are turned counterclockwise when viewed from the side, as shown in FIG. 12, the operating spring (74) opens outward. By being pulled forward while being elastically deformed, the lock member (71) attached to the rear end is also moved forward. At this time, if the backrest (40) is tilted backward, the gap (S) between the rear limit stopper step (65b) of the flange plate (65) and the contact portion (70) is closed, Since the lock member (71) is small, the lock member (71) cannot enter the gap (S) and waits with its front end pressed against the outer peripheral surface of the flange plate (65).

  In this state, when the back is tilted away from the backrest (40), the wedge-shaped front end of the lock member (71) automatically enters the gap (S) as shown in FIG. And the rotation of the flange plate (65) is locked. Thereby, since the pivot of the pivot portion (8a) and the backrest support rod (8) integrated with the flange plate (65) is also locked, the reclining of the backrest (40) becomes impossible.

  When the handle (78) is operated upward and the operating rod (76) and the rotating plate (77) are rotated clockwise in a side view, the operating spring (74) is greatly bent inward. As shown in FIG. 11, the backrest (40) can be reclined again by releasing the lock member (71) rearward from the gap (S) and unlocking the lock member (71).

  At this time, if the back is separated from the backrest (40) and the load applied to the backrest (40) is eliminated, the lock member (71) is easily detached from the gap (S).

  When such a backrest locking device is used, the lock member (71) is engaged with the gap (S) to lock the backrest (40) unless the back is separated from the backrest (40). Since the lock member (71) cannot be released from the gap (S) and the backrest (40) cannot be unlocked, the backrest (40) can be lifted rapidly with a backward load applied. Tilt is prevented.

  In the above embodiment, the support piece (25) for supporting the rear portion of the seat body (11) by the support shaft (29), the upward protrusion (16) standing on the seat body (13), and It consists of an upward-facing seat support bracket (18) fixed to its side, but the upright projecting part (16) has a slightly larger standing dimension and its upper end is pivotally fitted directly to the support shaft (29). You may make it do.

  Further, in the above embodiment, the locking member (71) that locks and releases the tilt of the backrest (40) is moved back and forth by the wire-like operating spring (74). An actuating spring can be used.

Such a locking device including the locking member (71), the operating spring (74), and the like may be only one of the left and right.
The front end stopper step (65a) may be in contact with the upper surface of the support base (6) in front of the recess (61), and the contact member (69) may be omitted.

It is a front view of a reclining chair to which the present invention is applied. Similarly, it is a side view. Similarly, it is a disassembled perspective view of the attaching part to the backrest support collar of a seat and a backrest. It is the IV-IV line expansion vertical rear view of FIG. Similarly, it is the VV line enlarged vertical front view of FIG. It is an enlarged plan view which removes a cover and shows a support base. It is the VII-VII line enlarged vertical front view of FIG. Similarly, it is a VIII-VIII line expansion vertical side view. Similarly, it is an IX-IX line enlarged vertical side view. Similarly, it is an XX line enlarged vertical rear view. It is a XI-XI line expansion vertical side view similarly. It is a vertical side view of the same site as FIG. 11 when the backrest is locked.

(1) Chair
(2) Casters
(3) Footpad
(4) Leg
(5) pedestal
(6) Support base
(7) Seat support frame
(8) Back support
(8a) Axis
(9) Guide member
(9a) Guide groove
(10) Bolt
(11) Seat
(12) Cushion material
(13) Seat plate
(14) Slide member
(14a) Slide groove
(15) Recessed hole
(16) Upward protrusion
(16a) Side piece
(17) Mating groove
(18) Seat support bracket
(19) Through hole
(20) Bolt
(21) Fixed plate
(21a) Blocking piece
(22) Through hole
(23) Recess
(24) Nut
(25) Support piece
(26) Cover
(26a) Shaft-shaped protrusion
(27) Mounting hole
(28) Support cylinder
(28a) Projection shaft
(29) Spindle
(30) Square axis
(31) Round hole
(32) Bush with hook
(33) Back support member
(34) Square hole
(35) Bolt
(36) Through hole
(37) Female thread
(38) Cap
(39) Back frame mounting rod
(40) Backrest
(41) Back frame
(41a) Side frame
(41b) Mounting part
(42) Backboard
(43) Opening
(44) Mounting hole
(45) Groove
(46) Armrest
(46a) Downward mounting part
(47) Concave groove
(48) Through hole
(49) Bolt
(50) Through hole
(51) Female thread hole
(52) Mating recess
(53) Rubber torsion unit
(54) Inner cylinder
(55) Outer cylinder
(56) Torsion rubber
(57) Recess
(58) Protrusion
(59) Pin
(60) Bush
(61) Recess
(62) Bolt
(63) Fixing tool
(64) Cover
(65) Flange plate
(65a) Stopper step for front limit
(65b) Rear limit stopper step
(66) Notch
(67) Recess
(68) Bolt
(69) Contact member
(70) Contact part
(71) Lock member
(72) Guide groove
(73) Guide piece
(74) Actuating spring
(74a) Outward bending piece
(74b) Inward bending piece
(75) Projection
(76) Operation rod
(78) Operation handle

Claims (7)

On the support base provided at the upper end of the leg body, the inward pivot part of the lower end of the pair of left and right back support rods facing upward and downward is backed against the forward biasing means provided on the support base. A seat that is pivotally attached so that the support rod can be rotated rearward, and the backrest attached to the two backrest support rods is tilted rearward so that it can be moved in the front-rear direction by the support base. In the reclining chair where the back of the body tilts backward and downward,
A pair of left and right support pieces facing upward are provided on both left and right side portions of the rear portion of the seat body, and the left and right sides of the upper and lower support pieces are directed vertically on both sides of the rear portion of the seat body. The support piece is pivotally supported by a support shaft inward in the left-right direction provided in a portion located above the seat body in the back support rod of the back support rod so that the support portion of the support piece to the back support rod is A reclining chair, characterized in that it is located outward from both sides of the rear part of the seat. At the front part of the support base, a seat support frame that gradually expands outward as it goes forward projects from the left and right front end upper surfaces, so that the lower surfaces of both sides of the front part of the seat body face each other. by providing guide means, formed by slidably supported in the longitudinal direction claim 1 Symbol placement reclining chair. The guide means is provided on one of the seat support frame and the seat body, and is also provided on the other side of the guide member having a pair of left and right guide grooves, and is slidably fitted into the both guide grooves. The reclining chair according to claim 2, comprising a slide member facing in the front-rear direction. The backrest, flexible and made of synthetic resin having, according to its right and left sides of the lower end, claim 1-3 comprising attaching a backrest support member fixed to the inner end of the support shaft Reclining chair. The forward urging means includes a laterally provided outer cylinder that is non-rotatably provided inside the support base, an inner cylinder that is loosely fitted to the outer cylinder, and a gap between the outer cylinder and the inner cylinder. a rubber torsion unit consisting of anchored torsion rubber, on both ends of the inner cylinder, the pivot portion of the lower end of the left and right backrest support rods, to any one of claims 1 to 4 as non-rotatably connected Recliner chair listed. Extending both side edge portions of the inner cylinder of the rubber torsion unit to the outside than the outer tube, is fitted a pivot portion of the backrest support rod at both ends thereof, they become joined by a pin according to claim 5, wherein Reclining chair. The reclining chair according to claim 5 or 6 , wherein an upward projecting portion is provided at the center of the inner upper surface of the support base, and the lower surface of the outer cylinder is fitted to the projecting portion.

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