JP2002119347A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair which a use can easily change the depth dimension of the seat face matching his/her physique. SOLUTION: This chair is constituted by equipping a seat part 1, seat receiver 2 to support the seat part 1, rear seat receiver 3 extended toward the rear upper side against the seat receiver 2 in the rear part side of the seat receiver 2, slide mechanism X1 to forward and rearward move the seat part 1 mutually biting relating to the seat part 1 and the seat receiver 2 so as to move up the rear end of the seat part 1 along the rear seat receiver 3, and a regulating part Y1 to releasably regulate the movement of the seat part 1 by the slide mechanism X1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair capable of adjusting the depth of a seat according to the size of a seated person.

[0002]

2. Description of the Related Art In general, if the depth dimension of a seat surface of a chair is too large or too small compared to the physique of the occupant, the occupant is forced to have an unnatural posture.
Therefore, conventionally, in a chair including a seat portion and a backrest portion, by substantially horizontally moving either the seat portion or the backrest portion back and forth, the seat is substantially lowered in accordance with the physique of the seated person. 2. Description of the Related Art There is known a chair having a configuration in which a depth dimension of a seat portion that can be adjusted can be adjusted.

[0003]

However, in such a case, when the backrest is moved forward or the seat is moved backward, the rear end of the seat protrudes rearward from the backrest. And the appearance becomes extremely poor. Further, in a chair having no backrest portion or a chair in which the seat portion or the backrest portion cannot be moved back and forth, the depth of the seat portion cannot be changed by the above-described configuration in the first place. If you do not fit your physique, you will be forced to sit in a cramped posture, and to avoid such problems, you must obtain a chair that corresponds to the individual physique of the occupant.

[0004] In order to solve the above-mentioned problems, the present invention provides a chair in which the depth of the seat can be easily changed according to the physique of the occupant regardless of the presence or absence of the backrest. It is intended to provide.

[0005]

That is, a chair according to the present invention comprises a seat, a seat supporting the seat, and a rear seat extending rearward and upward with respect to the seat at a rear end side of the seat. And a slide mechanism that is arranged in association with the seat and the seat receiver, meshes with each other, and slides the seat back and forth with respect to the seat receiver so that the rear end portion rises along the rear seat receiver. And a regulating portion that regulates the movement of the seat portion so as to be releasable.

With such a configuration, the seat is slid back and forth to set its depth dimension, that is, the dimension in the front-rear direction of the region capable of substantially supporting the range from the buttocks to the thighs of the seated person. It can be adjusted according to the physique of each seated person with a simple slide mechanism. If the sliding movement of the seat is regulated by the regulating portion, the stability at the time of sitting is improved, and if the regulation is released as required, the depth dimension of the seat surface can be adjusted. In addition, when the seat is moved backward to shorten the depth, the rear end of the seat rises along the rear seat support, so that only the rear end protrudes rearward and the appearance is poor. Can be effectively avoided.

[0007] As a suitable slide mechanism having such an action, there is a slide mechanism provided with a mutually meshing rack gear and a pinion gear arranged in association with a seat portion and a seat support.

[0008] Specifically, a preferred configuration of the chair is such that a rack gear is fixedly provided on a seat support so that a longitudinal direction thereof coincides with the front-rear direction, and a pinion gear is supported on the seat so as to be able to rotate back and forth. Is mentioned.

In the case of such a chair, in order that the operation of restricting or releasing the sliding movement of the seat can always be performed at a substantially fixed position with respect to the seat, the movement or movement of the seat by the restricting portion is required. It is desirable to attach an operation unit for selectively switching the regulation to the seat.

Further, in order to easily perform the rotation operation of the pinion gear with respect to the rack gear and the accompanying sliding movement of the seat with a simple configuration, the regulating portion is separated from and connected to the pinion gear by operating the operation portion. It is preferable to provide a stopper gear that can mesh with the pinion gear and restrict the rotation of the pinion gear. In particular, when it is not necessary to move the seat part back and forth, the stopper gear always meshes with the pinion gear to suppress the rotation of the pinion gear, and to enable the meshing to be released only when the seat part is moved, The restricting portion is provided with an elastic member that presses the stopper gear elastically deformable in a direction in which the stopper gear meshes with the pinion gear, and restricts the rotation of the pinion gear by operating the operating portion against the elastic force of the elastic member. It is effective to configure to cancel.

[0011] Further, as another preferred specific configuration of the chair, a rack gear is fixedly provided on a seat portion so that a longitudinal direction thereof coincides with a front-rear direction, and a pinion gear is supported by a seat support so as to be rotatable back and forth. Are included.

In the case of such a chair, in order to be able to restrict or release the sliding movement of the seat at a predetermined position that does not move back and forth together with the seat, the seat is controlled by the restricting portion. It is preferable to attach an operation unit for selectively switching the movement or the restriction to the seat.

[0013] In this case, in order to easily perform the rotation operation of the pinion gear with respect to the rack gear and the accompanying sliding movement of the seat portion with a simple configuration, the regulating portion includes a recess formed in the seat support, It is effective to provide a stopper pin that is fitted into the recess so as to be able to protrude and retract through operation of the part and that can restrict the rotation operation of the pinion gear.

When it is not necessary to move the seat part back and forth, the stopper pin always fits into the recess to suppress the rotation of the pinion gear, and the fitting can be released only when the seat part is moved. Is provided with an elastic member that presses the stopper pin elastically deformable in a direction in which the stopper pin fits into the concave portion, and operates the operating portion against the elastic force of the elastic member to control the rotation of the pinion gear. It will be effective to release regulations.

In any of the chairs having the above-described configurations, an expected suitable range in which the seat can slide is determined in advance so that the seat does not fall off the seat when the seat slides. In order to do so, it is desirable to form a movable range defining portion for defining the sliding movement of the seat within a predetermined range in relation to the seat and the seat support.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) The chair of this embodiment is
As shown in FIG. 1, the seat 1, the backrest 6, and the seat 1
And a back support rod 7 for supporting the backrest 6
And a leg 8 that supports the seat support 2 and the back support rod 7 and contacts the floor surface.
And In addition, a slide mechanism X1 that slides the seat 1 in the front-rear direction is provided in relation to the seat 1 and the seat receiver 2.

As shown in FIGS. 1 to 3, 5 and 6, the seat support 2 has a front end supported by the leg 8 and a rear end supported by the back support rod 7, and is oriented in the front-rear direction. And a pair of left and right seat frames 21 extending substantially horizontally, and a connecting member 22 for connecting the two seat frames 21 to each other. The seat frame 21 is a U-shaped channel member having a top wall 211, an outer wall 212, and an inner wall 213 and opening downward and having a U-shaped cross section. The connecting member 22 includes a front wall 221, a rear wall 222, and a bottom wall 223. A seat frame 21
The outer surface of each wall of the connecting member 22 is connected to the inner side wall 213 by welding or the like, thereby reinforcing the seat frame 21. Further, between the rear ends of the seat frames 21, a lower end portion 3a of a plate-shaped rear seat support 3 which extends upward and rearward and is inclined is attached. The upper end portion 3b of the rear seat support 3 is supported via a pin 62a on a bent portion of a lumbar support 62 which is attached to the upper end portion of the leg portion 8 so as to be able to rotate back and forth and which is bent in a "-" shape. For this purpose, the upper end 3b of the rear seat 3
Is mounted with a bracket 31 having a hole 311, and a pin 62 a is movably supported in the hole 311. Such a lumbar support 62 is for supporting a seated person's waist, and is attached to a lower end portion of a flexible upholstery 61 attached to a part of the back support rod 7.

On the other hand, as shown in FIGS. 1 to 6, the seat portion 1 supports a seat body 11 having cushioning properties and a portion extending from a front end portion 11a of the seat body 11 to a center portion and a position slightly rearward. The seat body 11 includes a hard seat plate 12 attached to the rear surface side of the seat body 11 and a rear seat plate 13 attached to the seat plate 12 from below so as to support a rear end 11 b of the seat body 11. On the upward surface of the seat body 11, a region capable of substantially supporting the range from the buttocks to the thighs of the seated person is defined as a seating surface A1.
Is set as The periphery of the seat body 11 is covered with a cover material (not shown).

The seat plate 12 has a side end portion 12c curved upward so as to hold not only the rear surface side but also the side portion of the seat body 11, and a front end portion 12a is gently lowered downward along the leg of the seated person. It is a curved plate. An upper wall 121 of a bracket 121 having an L-shape in a front view is provided on a back surface of the front end 12a of the seat plate 12 along one side end 12c.
a is screwed from below and attached to the side wall 121 b of the bracket 121.
c is formed to penetrate in the thickness direction. This long hole 12
1c, a pin 23 attached to the inner wall 213 of the seat frame 21 is inserted, and the seat portion 1 is inserted into the seat receiver 2 within a range in which the long hole 121c can move back and forth along the pin 23 together with the seat plate 12. It is made to slide with respect to it. That is, the pin 23 and the elongated hole 121c constitute a movable range defining portion V1 that defines a sliding range of the seat 1. Although the movable range defining portion V1 is formed only between the seat plate 12 and one seat frame 21 in the illustrated example, it may be formed between the seat plate 12 and both seat frames 21. .

The rear seat plate 13 is made of a thin resin plate that can be flexibly deformed. The front end portion 13a is rotatably mounted on the rear end portion 12b of the seat plate 12 via a hinge 32 so as to be rotatable. The entire rear end 11b side is supported from below.
The rear seat plate 13 has a plurality of grooves 131 formed on the rear surface side thereof at predetermined intervals in the front and rear directions extending in the width direction, that is, the direction orthogonal to the sliding movement direction of the seat 1. Further, a pair of long holes 132 extending in the front-rear direction through the thickness of the rear seat plate 13 is provided so as to cross the plurality of grooves 131. Each of these long holes 132 is formed so as to be positioned directly above the seat frame 21. When attaching the seat 1 to the seat 2 and the rear seat 3, the rear end of the seat frame 21 and the lower end 3a of the rear seat 3 are pinned from above so as to pass through the elongated holes 132, respectively. Along with the sliding movement of the seat 1, the long hole 132 slides back and forth along the shaft Pb of the pins P,
At this time, the lift of the rear seat plate 13 is adjusted to the head Pa of the pin P.
To prevent it.

As shown in FIGS. 2, 3, 5 and 6, the sliding mechanism X1 for sliding the seat 1 back and forth is composed of a pair of rack gears RG1 attached to the seat support 2.
And a pair of pinion gears PG1 attached to the seat 1 so as to mesh with the rack gear RG1.
The rack gear RG <b> 1 is in the form of an elongated plate having a plurality of teeth arranged in parallel in the front-rear direction on the upward surface, and is fixed to a side end of the upper surface of the bottom wall 223 of the connecting member 22. The pinion gear PG1 is provided on the peripheral wall with the rack gear RG.
It has a disk shape with teeth formed at the same pitch as 1 and is rotatably mounted on a side wall 142 of the bracket 14 having an L shape in a front view via a horizontal support shaft a. The upper wall 141 of the bracket 14 is screwed to the seat plate 12 from below. The horizontal support shaft a is provided with the left and right pinion gears PG1.
And the operation of both pinion gears PG1 is synchronized.

Further, a restricting portion Y1 for restricting the sliding movement of the seat portion 1 by the slide mechanism X1 so as to be releasable, and the restricting portion Y1 is operated to fix the seat portion 1 in a state in which the sliding movement is possible. An operation unit Z1 for switching the state and a motion conversion unit W1 for converting the operation of the operation unit Z1 into the operation of the regulating unit Y1 are provided on the seat unit 1.

The regulating portion Y1 has a pinion gear PG
A stopper gear SG1 formed with a plurality of teeth provided at the same pitch as the front and rear in parallel with 1 and a lower end fixed to the upper surface of the stopper gear SG1 so as to press the stopper gear SG1 in a direction meshing with the pinion gear PG1. A spring SP1 as an elastic member having an upper end fixed to the back surface of the seat plate 12; On the other hand, the operation portion Z1 is positioned below the side end portion 12c of the seat plate 12 in front of the one seat frame 21, and has a plate-shaped operation lever 4 having a substantially rectangular shape in plan view.
Consists of A through-hole is formed at the base end of the operation lever 4 so as to penetrate forward and backward. The shaft 4a is inserted into this through-hole and attached to the seat plate 12 by appropriate means (not shown).
, So as to be rotatable up and down. A pair of upright pieces 4 are provided on the upwardly facing surface at the base end of the operation lever 4.
1 is fixed by welding or the like. A shaft 4 penetrating the upper end portions of the upright pieces 41 back and forth between the upright pieces 41.
1a, a plate-like horizontal bar 42 extending inwardly
Is supported so as to be rotatable and slidable left and right. Further, both end portions of the stopper gear SG1 are supported by mounting members 5 fixed to the back surface of the seat plate 12. The mounting member 5 includes a pair of arms 5a fixed to both end portions of the stopper gear SG1, a pair of hanging pieces 5b fixed to the seat plate 12 from below, and the arms 5a rotatably supported by the hanging pieces 5b. Cylindrical connecting rod 5c with its inner end fixed
Consists of Further, the front hanging piece 5 of the mounting member 5
b through the rear end of the rotating shaft 51 extending back and forth,
The rotating shaft 51 is fixed to the connecting rod 5c. The front end of the rotating shaft 51 is positioned substantially directly below the inner end of the horizontal bar 42, and at this position, the front end of the rotating shaft 51 can be rotated by a pair of mounting pieces 52 attached to the back surface of the seat plate 12. Have been supported. Further, a lower end of an upright bar 53 arranged in an upright state between the pair of mounting pieces 52 is fixed to a front end of the rotating shaft 51. It is rotatably attached to one end. That is, the horizontal bar 42, the upright bar 53, and the rotating shaft 5 are provided from the upright piece 41 attached to the operation lever 4.
1 to the mounting member 5 supporting the stopper gear SG1 to form the motion converting portion W1.

When the operating lever 4 is rotated downward about the axis as shown by the arrow in FIG. 3 based on such a configuration, the horizontal bar 42 is slid outward and rotated downward. , The upright bar 53 is the rotating shaft 51
Is rotated while rotating to the operation lever 4 side. Accordingly, the mounting member 5 moves the stopper gear SG1 to the pinion gear P
It rotates in the direction meshing with G1, and as a result, the rotation operation is restricted in a state where the pinion gear PG1 meshes with both the stopper gear SG1 and the rack gear RG1. At this time, since the stopper gear SG1 is pressed downward by the elastic force of the spring SP1, the engaged state between the stopper gear SG1 and the pinion gear PG1 is not easily released. That is, in this state, the seat 1
In the front-rear direction is restricted.
On the other hand, when the operation lever 4 is rotated upward against the elastic force of the spring SP1, the horizontal bar 42, the upright bar 53, the rotating shaft 51, and the mounting member 5 operate in the opposite direction to the above, and the stopper gear SG1 Moves upward to a position where it does not mesh with the pinion gear PG1. In this state, the pinion gear PG1 meshes only with the rack gear RG1, and the rack gear R
It can rotate freely in the front-back direction along G1.
That is, when the restriction of the rotation operation of the pinion gear PG1 by the stopper gear SG1 is released, the seat 1 can be slid back and forth. The movable range of the seat 1 in this state is defined by the movable range defining portion V1 within the longitudinal dimension of the long hole 121c of the bracket.
Further, with the sliding movement of the seat 1, the rear seat plate 13 also slides back and forth while bending along the rear seat receiver 3, and at this time, the rear seat plate 13 is inserted into the elongated hole 132. Since the pin P is pressed from above by the head Pa, the pin P does not rise from the seat frame 21 and the rear seat support 3. Further, depending on the sliding position of the seat 1, the position where the rear seat plate 13 bends and curves changes forward and backward, but the opening degree of the groove 131 provided on the back surface of the rear seat plate 13 depends on the sliding of the seat 1. By appropriately changing in accordance with the position, the appropriate degree of bending of the rear seat plate 13 is realized, and the rear end portion 11b of the seat body 11 is properly held. Thus, the occupant moves the seat 1 to a position where the depth dimension on the seating surface A1 of the seat body 11 is adjusted to his / her physique.
When the operation lever 4 is rotated downward in a state where is moved, the seat portion 1 can be fixed at that position as described above. The sliding position of the seat 1 can be adjusted by operating the operation lever 4 while the seated person is sitting on the seat 1 to shift the weight back and forth. It can also be performed by lifting the floor or getting off the chair, operating the operation lever 4, holding the part of the seat 1, and moving the seat 1 back and forth.

In the chair according to the present embodiment, the lumbar support 62 is rotated in the front-rear direction about the lower end supported by the leg 8 regardless of the front-back position of the seat 1.
The inclination angle at which the rear end of the seat 1 approaches rearward can be changed. Specifically, when the lumbar support 62 is rotated forward, the lumbar support 62 pushes the rear seat receiver 3 upward and forward while the pin 162a moves inside the hole 311. As a result, the rear seat support 3 inclines forward and upward around the hinge 32, and accordingly, the rear seat plate 13 and the rear end 11b of the seat body 11 tilt forward while increasing the degree of curvature. become. Also at this time, since the groove 131 of the rear seat plate 13 expands and contracts according to the degree of curvature, even if the inclination angle of the seat body 11 increases, the seat body 11 rises backward while maintaining a smooth state.

As described above, according to the chair of the present embodiment,
Since the pinion gear PG1 provided on the seat 1 can be rotated back and forth along the rack gear RG1 provided on the seat receiver 2, the seat 1 can be slid back and forth by the slide mechanism X1. The seated person can adjust the depth dimension of the seating surface A1 according to his or her physique, and can sit down in an appropriate posture. In addition, the sliding movement of the seat 1 can be releasably regulated at a position adjusted by the occupant by the regulating portion Y1 formed in association with the seat 1 and the seat receiver 2. 1 does not move unexpectedly. Furthermore, the rear end of the seat 1 moves so as to rise along the rear seat 3 that extends obliquely upward and obliquely rearward with respect to the seat 2, so that the rear end protrudes rearward unnaturally. And good appearance can be maintained.

The restricting portion Y1 is operated by operating an operating portion Z1 provided on the seat portion 1 so as to slide with the seat portion 1.
Can selectively switch the movement or regulation of the seat 1 by the operator, so that the operation unit Z1 is always at a fixed position with respect to the seat 1, and the operation unit Z1 can be held while the occupant is sitting.
Is very convenient when adjusting the depth of the seating surface A1 by operating the.

Specifically, the restricting portion Y1 is provided with a stopper gear SG1 which moves up and down by operating the operating portion Z1, and when the stopper gear SG1 moves down, it meshes with the pinion gear PG1 to restrict its rotation operation. The pinion gear PG1 has a simple configuration.
Can be restricted or released, and the sliding movement of the seat 1 accompanying it can be restricted or released easily.
In particular, the restricting portion Y1 having such a configuration is provided with a spring SP1, which is an elastic member that presses the stopper gear SG1 in a direction in which the stopper gear SG1 meshes with the pinion gear PG1, so that when the restriction of the rotation operation of the pinion gear PG1 is released. Is configured to operate the operating portion Z1 against the elastic force of the spring SP1, so that the seat portion 1 cannot be normally slid by the elastic force of the spring SP1 to stabilize the seat portion 1 when seated. Performance can be improved.

(Second Embodiment) The chair in this embodiment shown in FIGS. 7 to 10 has substantially the same basic configuration as the chair of the first embodiment shown in FIG. That is, the chair of the present embodiment has the slide mechanism X2 for sliding the seat 110 back and forth in relation to the seat 110 and the seat support 120, and the backrest 6 is substantially the same as the first embodiment. , The back support rod 7, the legs 8, and the lumbar support 162.
Only different points from the embodiment will be described in detail.

The seat receiver 120 has a pair of left and right seat frames 121 extending substantially horizontally in the front-rear direction with a front end supported by a support and a rear end supported by a back support rod. And connecting members 1221 and 1222 before and after the front end and the rear end, respectively. The seat frame 121 includes an upper wall 1211, an outer wall 1212, and an inner wall 1 similar to those of the first embodiment.
213 is a channel member having a U-shape and having a downward opening and having a U-shape in cross section. The outer surfaces of the front and rear connecting members 1221 and 1222 are connected between the inner side walls 1213 by welding or the like to reinforce the seat frame 121. Is being planned. Further, between the rear end portions of the seat frame 121, a plate-shaped rear seat support 130 extending upward and rearward and having the same configuration as that of the first embodiment is inclined.
Is provided.

As in the first embodiment, the seat 110 has a cushion main body 111, and the seat main body 111 is supported so as to support a portion from the front end 111a of the seat main body 111 to a position slightly closer to the rear. It has a hard seat plate 112 attached to the back side, and a rear seat plate 113 that supports a rear end 111b of the seat body 111. Also in this case, the upward surface of the seat body 111 that can substantially support the range from the buttocks to the thighs of the seated person is set as the seating surface A2. The specific configurations of the seat plate 112 and the rear seat plate 113 are also the same as those in the first embodiment, and will not be described in detail here. It should be noted that a long hole 1132 is formed in the rear seat plate 113 and the pins P attached to the seat frame 121 and the rear seat support 130 are inserted into the long hole 1132 and that the rear seat plate 113 is parallel to the front and rear. A point where a plurality of grooves 1131 are arranged, a movable range defining portion V2 composed of a bracket 1121 having an elongated hole 1121c between the seat plate 112 and the seat frame 121 and a pin 123 inserted into the elongated hole 1121c is formed. This is the same as above. Further, a hole 131 of a bracket provided at an upper end of the rear seat support 130 is provided.
The same applies to a configuration in which the pin 162a of the lumbar support 162 is movably supported by the lumbar support 162, and the tilt angle at the rear end of the seat 110 can be changed with the rotation of the lumbar support 162.

Thus, the slide mechanism X2 according to the present embodiment comprises a pair of rack gears R attached to the seat plate 112.
G2 and the seat 1 so as to mesh with the rack gear RG2.
20 and a pair of pinion gears PG2. The rack gear RG <b> 2 is formed in an elongated plate shape having a plurality of teeth arranged in parallel in the front-rear direction on the downward surface, and the upward surface is attached to both end portions of the downward surface of the thin mounting plate 124. In this way, the mounting plate 124 is attached to the rear surface of the seat plate 112 at a substantially central portion in the front-rear direction by appropriate means such as screwing. On the other hand, the pinion gear PG2
Is a disk having teeth formed on the peripheral wall at the same pitch as the rack gear RG2.
It is mounted in a space between the inner wall 12 and the inner wall 1213 so as to be rotatable via a horizontal support shaft b penetrating both side walls. At this time, an opening window 1214 having a rectangular shape in a plan view is formed in the upper wall 1211 of the seat frame 121 so as to penetrate the seat frame 121 in the thickness direction, and the pinion gear PG2 is formed through the opening window 1214.
The upper end is exposed. The horizontal support shaft b is common to the left and right pinion gears PG2 and synchronizes the operation of the two pinion gears PG2, but has one side end directed sideways from one seat frame 121. It extends to protrude.

Further, a restricting portion Y2 for restricting the sliding movement of the seat portion 110 by the slide mechanism X2 so as to be releasable, and the restricting portion Y2 is operated to fix the seat portion 110 in a slidable state. An operation unit Z <b> 2 for switching between the state and the state is provided on the seat 120.

The restricting portion Y2 includes a stopper gear SG2 attached by welding or the like to the outer wall 1212 of the seat frame 121 on the side from which the horizontal support shaft b projects, and the horizontal support shaft b so as to engage with the stopper gear SG2. It mainly comprises a stopper pin 150 which can be protruded and retracted in the longitudinal direction. The stopper gear SG2 is a substantially disk-shaped one having a through hole SG2b at the center thereof for penetrating the horizontal support shaft b, and has a plurality of concave arcs SG2a formed in a partially arcuate shape on its peripheral wall. The stopper pin 150 is provided in the recess SG2.
It has a columnar shape having a radius substantially equal to a, and is attached to a peripheral portion of a disk-shaped mounting plate 151 which is positioned outside the stopper gear SG2 with a horizontal support shaft b penetrating the center. The above-described three stopper pins 150 are attached to the attachment plate 151 so as to be different from each other by substantially equal angular phases. Further, on the outer side surface 151a of the mounting plate 151,
A cylindrical tubular member 152 accommodating the horizontal support shaft b therein is mounted, and an outer side end of the tubular member 152 has a tubular operation grip 140 having a radius slightly larger than that.
The inner wall 141 is attached. This operation grip 1
40 constitutes the operation unit Z2 in the present embodiment. The outer end 140a of the operation grip 140 is opened so as to open the inside. The side end bx of the horizontal support shaft b is formed in a substantially rectangular plate shape, and the rectangular side end bx is attached to the inner wall 14 of the operation grip 140.
1 is inserted into a through-hole 141a formed to open in a substantially rectangular shape at a substantially central portion in FIG. With such a configuration, the operation grip 140, together with the mounting plate 151 having the cylindrical member 152 and the stopper pin 150, can be moved horizontally left and right along the horizontal support shaft b.
Further, one end of a spring SP2, which is an elastic member provided to hold the side end bx of the horizontal support shaft b, is fixed to the inner surface of the inner wall 141 of the operation grip 140, and the other end of the spring SP2. The portion is positioned inside the operation grip 140 at the side end bx of the horizontal support shaft b, and is fixed to a disk 142 attached with screws 143 from outside. The spring SP2 is connected to the stopper pin 150 via the inner wall 141 of the operation grip 140, the cylindrical member 152, and the mounting plate 151.
Is pressed in a direction to be fitted with the concave portion SG2a of the stopper gear SG2.

Based on such a configuration, in a normal state in which the operation grip 140 is not operated at all, the stopper pin 150 pressed by the elastic force of the spring SP2 is engaged with the recess SG2a of the stopper gear SG2 fixed to the seat frame 121. Since they are fitted, the operation grip 140 and the horizontal support shaft b do not rotate, and as a result, the pinion gear PG2
Is also restricted, and the seat 110 is fixed without sliding. 8 and 10
When the operation grip 140 is pulled outward against the elastic force of the spring SP2, the stopper pin 150 also moves outward and the engagement with the stopper gear SG2 is released, as indicated by an arrow in FIG. In this state, the operation grip 140
When the is rotated forward or backward, the side end bx of the horizontal support shaft b hits the through hole 141a formed in the operation grip 140, and the horizontal support shaft b rotates in the same direction as the rotation direction of the operation grip 140. Accordingly, the pinion gear PG2 also rotates in the same direction.
2 is geared forward and backward. As a result, the seat portion 110 slides back and forth, and the depth dimension of the seating surface A2 can be adjusted. Further, in this state, the spring SP2 is contracted between the inner wall 141 of the operation grip 140 and the disk 142 and the elastic force is stored, so when the hand is released from the operation grip 140, the stopper pin is formed by the elastic force of the spring SP2. 150 is the concave portion S of the stopper gear SG2
G2a, and as described above, the seating surface A2
The sliding operation of the seat 110 can be restricted at the position where the depth dimension of the seat 110 is adjusted.

The range in which the seat 110 can be slid is determined by the elongated hole 1121c in the movable range defining portion V2.
Can be defined within the opening range of the rear seat plate 1 and the pin P inserted into the long hole 1132 formed in the rear seat plate 113.
13 and the rear end of the seat body 111 are prevented from rising, and even if the rear end of the seat 110 moves so as to rise along the rear frame, the seat 1110 is formed by the groove 1131 of the rear seat plate 113. The effect of maintaining an appropriate shape can be obtained in the same manner as in the first embodiment.

As described above, even in the chair of the present embodiment, the rack gear RG2 provided on the seat 110
The seat 110 can be slid back and forth by the slide mechanism X2 configured to move the pinion gear PG2 provided forward and backward along with the rotation operation of the seated person. The depth dimension of the seating surface A2 can be adjusted, and the user can sit down in an appropriate posture. Further, the sliding movement of the seat 110 can be releasably regulated at a position adjusted by the occupant by the regulating portion Y2 formed in association with the seat 110 and the seat support 120. Because the 110 does not move unexpectedly, and the rear end of the seat 110 moves upward along the rear seat 130 that extends obliquely rearward and upward with respect to the seat 120, The rear end does not protrude backwards unnecessarily, and does not impair the appearance.

Further, by providing the operating portion Z2 on the seat support 120, the movement or the regulation of the seat portion 110 by the regulating portion Y2 is selectively switched.
The seat 11 is always in the fixed position regardless of the sliding position of
An operation for restricting or canceling the slide movement of 0 can be performed. Further, the stopper pin 150 is inserted into the concave portion SG2a formed in the stopper gear SG2 fixedly provided on the seat support 120 by operating the operation portion Z2.
Are fitted so as to be able to protrude and retract, so that the rotation operation of the pinion gear PG2 can be restricted, so that the rack gear RG2 moves forward and backward with the rotation operation of the pinion gear PG2 and the restriction, that is, the sliding of the seat 110. Movement and its regulation can be realized with a simple configuration. At this time, the regulating portion Y2 is provided with a spring SP2 for pressing the stopper pin 150 in a direction in which the stopper pin 150 is fitted with the concave portion SG2a of the stopper gear SG2. When the operating portion Z2 is operated against the elastic force of the spring SP2, the pinion gear is moved. Since the PG 2 can be rotated, the seat 110 cannot be slid or moved by the elastic force of the spring SP2 as in the case of the first embodiment.
10 can be improved in stability.

The present invention is not limited to the above embodiments. That is, the regulation unit and the operation unit of the second embodiment are applied to the slide mechanism of the first embodiment,
Restriction and release of the sliding movement of the seat may be performed, or the reverse configuration is also possible. Further, in the above embodiment, the seat receiver and the rear seat receiver are handled as separate members, but they may be integrally formed to support the seat. Further, a specific configuration of each part is not limited to the above-described embodiment. For example, a restriction part or an operation part having a configuration other than the above may be applied to the slide mechanism of each embodiment. Various modifications are possible without departing from the scope.

[0041]

The present invention is embodied in the form described above and has the following effects.

That is, in the chair according to the present invention, the seat is raised along the rear seat support extending rearward and upward at the rear end side of the seat support by the slide mechanism arranged in association with the seat and the seat support. The slide mechanism is configured to slide back and forth, and to restrict the movement of the seat by the slide mechanism to be releasable by the restricting portion.

According to such a chair, when the seat is slid back and forth through a simple slide mechanism, the seat can be substantially lowered by the seat, and the depth of the seat is reduced to the size of each seat. It can be easily adjusted to suit. Further, depending on the restricting portion, the seat can be switched between a state in which the seat can be slid and a state in which the seat cannot be slid, so that the seat does not move unexpectedly when seated and the stability of the seat is maintained. You can also. In addition, even if the seat is moved backward, the rear end rises along the rear seat support, so that the overall appearance of the chair can be kept good.

In particular, if a slide mechanism is provided in which a rack gear is provided on one of the seat portion and the seat receiving portion, and a pinion gear meshing with the rack gear is provided on the other, the structure of the slide mechanism exhibiting the above effects can be simplified. Can be.

As a specific construction of the slide mechanism, the rack gear is fixed to the seat support so that the longitudinal direction is in the same front-rear direction as the slide direction of the seat, and the pinion gear is supported on the seat so as to be able to rotate back and forth. By doing so, the slide mechanism can be appropriately related to the seat and the seat support. In this case, if the movement or restriction of the seat by the restrictor is selectively switched by operating the operation unit attached to the seat, the operation unit slides with the seat, so that the restriction of the slide movement of the seat or Cancel operation
It can be performed at a substantially fixed position with respect to the seat even while sitting on the seat.

Further, when the regulating portion is provided with a stopper gear capable of restricting the rotation operation of the pinion gear by being removably engaged with the pinion gear through the operation of the operating portion, when the stopper gear is engaged with the pinion gear, the pinion gear is rotated. Since the gear meshes with the rack gear, the rotation of the pinion gear, that is, the sliding movement of the seat, can be easily regulated, and when the stopper gear is separated from the pinion gear, the pinion gear can rotate and the seat can easily slide. Can be done. In this case, in particular, by providing an elastic member that presses the stopper gear in a direction in which the stopper gear meshes with the pinion gear, the rotation of the pinion gear can be restricted by operating the operation unit against the elastic force of the elastic member. When configured so that it can be released, it is only necessary to operate the operation unit when adjusting the depth dimension of the seat surface, and it is possible to improve the stability of the seat part when sitting by disabling the seat normally. it can.

In the chair of the present invention, the regulating portion may be configured such that the rack gear is fixed to the seat portion with the longitudinal direction facing forward and backward, and the pinion gear is supported by the seat support so as to be able to rotate forward and backward. . In this case, if the movement or the regulation of the seat by the regulating unit is selectively switched by the operation of the operating unit attached to the seat support, the operation for regulating or releasing the sliding movement of the seat at the fixed position is performed. be able to. Further, a restricting portion is constituted by a concave portion formed in the seat support and a stopper pin which is fitted to the concave portion so as to be able to protrude and retract to restrict the rotation operation of the pinion gear, and the operation of the protruding and retracting operation of the stopper pin is performed by the operation portion. Accordingly, the rotation operation of the pinion gear, that is, the sliding movement of the seat and the regulation thereof can be realized with a simple configuration. At this time, if the regulating portion is provided with an elastic member that presses the stopper pin in a direction in which the stopper pin fits into the concave portion, and if the operating portion is operated against the elastic force of the elastic member, the pinion gear can be rotated. Normally, the stability of the seat is improved by keeping the seat stationary, and the seat can be moved as required.

In any of the chairs described above, if the movable range defining portion formed in association with the seat and the seat can regulate the sliding movement of the seat within a predetermined range, It is possible to easily realize that the seat can be slid only within the expected suitable range, and that the stability of the seat within the range can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a chair according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the seat in the embodiment with a part of the seat being omitted;

FIG. 3 is a perspective view showing the main part.

FIG. 4 is a perspective view showing the seat plate and a rear seat plate.

FIG. 5 is a sectional view taken along line VV in FIG. 2;

FIG. 6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a sectional view showing a seat according to a second embodiment of the present invention, corresponding to FIG. 5;

FIG. 8 is a perspective view showing the main part.

FIG. 9 is a perspective view showing the seat plate and the rear seat plate.

FIG. 10 is an enlarged cross-sectional view showing the main part.

[Explanation of symbols]

 1, 110: seat 2, 120: seat 3, 130: rear seat 150: stopper pin PG1, PG2: pinion gear RG1, RG2: rack gear SG1, SG2: stopper gear SG2a: recess SP1, SP2: elastic member ( Spring) V1, V2: movable range defining portion X1, X2: slide mechanism Y1, Y2: regulating portion Z1, Z2: operating portion

Claims (11)

[Claims] 1. A seat, a seat supporting the seat, a rear seat extending rearward and upward with respect to the seat at a rear end side of the seat, and a seat arranged in association with the seat and the seat. A sliding mechanism that meshes with each other and slides the seat part back and forth with respect to the seat receiver so that the rear end part rises up along the rear seat receiver;
A chair comprising: a regulating portion that regulates a movement of a seat portion by a slide mechanism to be releasable. 2. The chair according to claim 1, wherein the slide mechanism includes an intermeshing rack gear and a pinion gear disposed in association with the seat and the seat support. 3. The rack gear according to claim 2, wherein the rack gear is fixed to the seat support so that the longitudinal direction thereof coincides with the front-rear direction, and the pinion gear is supported on the seat so as to be able to rotate back and forth. Chair. 4. The chair according to claim 3, wherein an operation unit for selectively switching movement or restriction of the seat by the restricting unit is attached to the seat. 5. The chair according to claim 4, wherein the restricting portion includes a stopper gear capable of restricting the rotation of the pinion gear by removably meshing with the pinion gear by operating the operating portion. 6. The pinion gear according to claim 6, wherein said restricting portion includes an elastic member which presses said stopper gear so as to be elastically deformable in a direction in which said stopper gear meshes with said pinion gear, and operates said operating portion against an elastic force of said elastic member. The chair according to claim 5, wherein regulation of the rotation operation is released. 7. The rack gear according to claim 2, wherein the rack gear is fixed to the seat so that its longitudinal direction coincides with the front-rear direction, and the pinion gear is supported on the seat so as to be able to rotate back and forth. Chair. 8. The chair according to claim 7, wherein an operation unit for selectively switching movement or restriction of the seat by the restriction unit is attached to the seat support. 9. The restricting portion includes a concave portion formed in the seat support, and a stopper pin capable of restricting the rotation of the pinion gear by being fitted into the concave portion through operation of the operating portion so as to protrude and retract. The chair according to claim 8, wherein 10. The pinion gear according to claim 1, wherein said restricting portion includes an elastic member which presses said stopper pin in a direction in which said stopper pin is fitted into said concave portion so as to be elastically deformable, and operates said operating portion against an elastic force of said elastic member. The chair according to claim 9, wherein the restriction on the rotation operation is released. 11. A movable range defining portion for defining a sliding movement of a seat within a predetermined range is formed in relation to the seat and the seat support. , 6,
The chair according to 7, 8, 9 or 10.