JP2003111636A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lightly move a seat in the forth and back direction of a chair in which the seat is movable following to standing-up and falling-down states of a back rest. SOLUTION: A back frame 14 rotatably provided in the forth and back direction of the chair by a supporting shaft 13 fixed on the back part of the chair and extended up and downward from the supporting shaft 13, a hanging member 7 whose top part is rotatably connected and hung by means of a shaft on a fixed part and which is rocked in the front and the back directions around the top part as a center, a seat frame 8 rotatably connected with the bottom part of the hanging member 7 and the bottom part 14b of the back frame 14 and provided under an approximately horizontal condition and an adjusting means 31 for a resistance force against rocking of the hanging member 7 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair, and more particularly to a reclining chair in which a seat is moved forward by tilting a backrest backward.

[0002]

2. Description of the Related Art Conventionally, in a reclining chair as described above, as a structure for supporting the seat so as to be movable in the front-rear direction, rails are provided in the front-rear direction on a fixed frame of the chair, and the seat slides on the rail. It is known how to mount it as much as possible.

[0003]

In the conventional structure in which the seat is slidably mounted on the rail as described above, since the sliding frictional resistance is large, the leaning when the seating posture is changed from the normal sitting posture to the reclining posture. The force and the returning force when returning from the reclining posture to the normal sitting posture are increased.

Therefore, there is a problem that it is difficult for a user, such as an elderly person, who has weak strength to get up from the reclining posture.

Therefore, the present invention has an adjusting mechanism for adjusting the moving force of the seat. When the adjusting mechanism is free, the movement of the seat in the front-rear direction is made lighter than that of the conventional rail system. It is an object of the present invention to provide a chair that can easily get up even for an elderly person or the like who is particularly weak.

[0006]

In order to solve the above-mentioned problems, the first invention according to claim 1 is rotatably provided in the front-rear direction of the chair by means of a support shaft fixed to the rear portion of the chair. A back frame extending upward and downward from a support shaft, an upper part rotatably connected to a fixed part by a shaft so as to vertically extend, and a hanging member swinging in the front-rear direction about the upper part, and a lower part of the hanging member. A seat frame rotatably connected to the lower portion of the back frame and provided in a substantially horizontal state,
It is characterized in that adjustment means is provided for adjusting the resistance of the suspension member to swing.

In the present invention, the adjusting means adjusts the resistance of the hanging member against the swing to an amount suitable for the user, so that the seat and the backrest can be prevented from unintentionally moving during use.

Further, by removing the resistance force of the adjusting means to allow the suspension member to freely swing, the seat freely swings in a pendulum manner by the suspension member. By thus suspending and holding the seat and swinging the seat in a pendulum manner, the resistance against movement of the seat becomes smaller than that of the conventional seat supported by rails.

According to a second aspect of the present invention, in the first aspect of the present invention, the suspension member is provided such that an upper portion thereof is rotatably connected to a shaft provided at a lower portion of a fixed elbow frame. There is something.

According to a third aspect of the present invention, in the first or second aspect of the invention, the adjusting means is provided on the hanging member with an adjusting member that moves together with the hanging member, and the fixing member is provided with the adjusting member. A sandwiching member for slidably sandwiching the adjusting member is provided, a body adjustment knob is provided on the fixed member, and the operation of the adjustment knob adjusts the holding force of the adjustment member by the grasping member.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described based on the embodiments shown in the drawings.

In FIGS. 1 and 2, reference numeral 1 is a pedestal of a chair, on which a rotary table 2 is rotatably provided in a horizontal plane. As shown in FIG. 2, side frames 3 are positioned upright on both sides of the turntable 2, and a member that constitutes an elbow portion is formed on the upper ends of the side frames 3; in the example shown, a plate-shaped elbow plate 4 is a chair. Are arranged and fixed in the front-back direction.

A bearing 5 is fixedly mounted on the lower surface of the central portion of the both elbow plates 4 in the front-rear direction, and a supporting shaft 6 is horizontally provided in the bearing 5 and hung on the supporting shaft 6. The upper end of the member 7 is rotatably connected, and the hanging member 7 is rotatably provided so that the lower part thereof swings in the front-rear direction around the support shaft 6. A seat frame 8 which is a member that constitutes a seat is arranged at the lower end of the hanging member 7.

A seat receiving metal fitting 9 is fixedly mounted on the lower surface of the seat frame 8 at a substantially central portion in the front-rear direction, and the lower end portion of the hanging member 7 is rotatable on the seat receiving metal fitting 9 by a horizontal pin 10 in the left-right direction. The seat frame 8 is supported by the hanging member 7. Therefore, the seat frame 8 is attached to the hanging member 7.
It is designed to move in the front-rear direction like a pendulum while suspended by. The seat frames 8 are provided on the left and right sides of the chair as shown in FIG. 2, and are supported by the hanging members 7 provided on both sides. The left and right seat frames 8 are connected to each other by a connecting rod 11.

A bearing 12 is fixed to the rear end of the elbow plate 4 by welding or the like, and a support shaft 13 is fixed to the bearing 12 so as to be horizontally arranged in the left-right direction of the chair. And
A back frame 14 that constitutes a backrest is rotatably provided on the support shaft 13, and the back frame 14 rotates about the support shaft 13 in the front-rear direction of the chair. Further, the back frame 14 is integrally formed with an upper frame 14a extending upward and a lower frame 14b extending downward with the supporting shaft 13 as a boundary.
The lower end of b is rotatably connected by a horizontal connecting pin 15 provided at the rear end of the seat frame 8,
It supports the rear of the car.

As shown in FIG. 2, the back frames 14 are arranged on the left and right sides of the chair, and the back frames 14 are rotatably supported on the rear portion of the elbow plate 4 by the structure described above, and the left and right seat frames are arranged. Supporting the rear in 8.

With the above structure, when the upper frame 14a of the back frame 14 is tilted backward (direction of arrow A) in FIG. 1, the lower frame 14b is moved forward (direction of arrow A1).
When the seat frame 8 is moved forward in the arrow A2 direction and the upper frame 14a is erected forward (arrow B direction), the lower frame 14b is moved backward (arrow B1 direction) to move the seat frame 8 Is moved backward in the direction of arrow B2.

Next, the details of the structure of each part will be described.

An inverted U-shaped physical condition knob mounting metal fitting 16 as shown in FIGS. 3 and 4 is spotted on a substantially central portion of the both elbow plates 4 in the front-rear direction, that is, on the lower surface near the rear of the hanging member 7. It is fixed by welding and installed vertically. As shown in FIG. 4, a bearing 16a horizontally arranged in the left-right direction of the chair is fixedly provided at the lower end of the physical condition knob mounting bracket 16, and a bolt 17 is loosely fitted in the bearing 16a.
A pressing member 18 is fixed to the inner end 17a of the bolt 17 by swaging or welding.

Between the pressing member 18 and the physical condition knob mounting bracket 16, three side holding members 19 made of a material having a large frictional resistance such as resin and shown in FIG. 5 are arranged. Two adjusting members 21 each having an elongated hole 21a as shown in FIG. 3 are sandwiched and arranged between the three sandwiching members 19. The pressing member 18, the sandwiching member 19 and the adjusting member 21 are each formed in a plate shape.

The tip of the adjusting member 21 is the hanging member 7.
Is rotatably connected to the pin by means of a pin 22, and the rear part has a free end.

Then, the bolts 17 are loosely fitted through the holes 19a formed in both the holding members 19 and the elongated holes 21a formed in the adjusting member 21 so that the holding members 19 and the adjusting member 21 are attached to the bolts 17. Is supported by.

An anti-rotation bolt 23 is provided on the upper part of the pressing member 18, and the anti-rotation bolt 23 is loosely fitted in a hole 24 formed in the upper part of the holding member 19 and the physical condition knob mounting metal fitting. The bolt 17, the pressing member 18, and the holding member 19 are screwed to the shaft 16 so that they do not rotate around the axis of the bolt 17. The adjusting member 21 may be a single piece, and the single adjusting member 21 may be sandwiched by the two sandwiching members 19. When the number of the adjusting members 21 is two and the number of the sandwiching members 19 is three as in the above-described embodiment, the braking area of the adjusting members 21 can be increased to facilitate the adjustment of the swing of the seat frame 8.

A physical condition knob 2 is provided on the outer end of the bolt 17.
6 is provided. A mounting hole 27 is formed in the shaft center portion of the body condition knob 26, a contact portion 28 is provided on the outer periphery of the front portion of the mounting hole 27, and a nut 29 is embedded and fixed on the outer periphery of the rear portion of the mounting hole 27. ing. And the physical condition knob 2
6 is screwed to the outer end of the bolt 17 by its nut 29.

With the above structure, when the body adjustment knob 26 is rotated in the tightening direction, the abutment portion 28 abuts the outer surface of the body adjustment knob mounting bracket 16 via the plate 30, and the bolt 17 is attached to the body adjustment knob 26 side by the nut 29. The holding member 18 pushes the holding member 19 and the adjusting member 21 toward the body-conditioning knob mounting bracket 16 side. Therefore, when the tightening degree (amount) of the physical condition knob 26 is increased, the frictional resistance between the holding member 19 and the adjusting member 21 is increased, and the resistance force of the adjusting member 21 against sliding is increased, and
When the physical condition knob 26 is loosened, the resistance of the adjusting member 21 against sliding is reduced.

The physical condition knob 26, the bolt 17, the sandwiching member 19, the adjusting member 21 and the like constitute a mechanism for adjusting the force capable of sliding the seat frame 8 in the front-rear direction. The adjusting means 31 adjusts the resistance to the. The adjusting means 31 are provided on the left and right sides of the chair as shown in FIG.

Next, the peripheral structure of the bearing 12 will be described with reference to FIGS.

FIG. 7 is an enlarged sectional view taken along line MM in FIG.
FIG. 8 is a sectional view taken along line NN in FIG.

In FIG. 7, reference numeral 4 denotes the elbow plate, and a bearing 12 is fixedly provided at the rear end of the elbow plate 4. A support shaft 13 is horizontally arranged in the left-right direction of the chair on the bearing 12, and the support shaft 13 has its outer end fitted into the bearing 12 and fixed to the bearing 12 by a pin 32 so that the support shaft 13 cannot rotate. It is equipped. The back frame 14 is rotatably provided at the inner end of the support shaft 13.

A lock cylinder 33 is rotatably fitted around the outer periphery of the support shaft 13 between the bearing 12 of the support shaft 13 and the back frame 14, and the outer end of the lock cylinder 33 is the bearing 12. It is rotatably fitted inside, and a lock link 34 is fixed to the inner end by welding or the like. As shown in FIG. 8, the lock link 34 is disposed upward from the lock tube 33, that is, the support shaft 13,
A locking pin 35 is provided at its upper end so as to cross the front side (front surface) of the back frame 14. To the other end of the locking pin 35, a lower portion of a connecting link 36 arranged substantially parallel to the back frame 14 is rotatably connected by a pin 37.

In FIG. 1, a pillow frame 38 is rotatably provided on the upper portion of the back frame 14 by a pin 39, and the pillow frame 38 is erected up and down around the pin 39 in the front-rear direction. A link 40 is fixed to the lower portion of the pillow frame 38 so as to project to the front side, and an upper portion of the connecting link 36 is provided at the front portion of the link 40 with a pin 41
Are rotatably connected by.

The bearing 12, the support shaft 13, the lock cylinder 33,
Locking link 34, locking pin 35, connecting link 36,
The pillow frame 38 and the like are provided on the left and right sides of the chair as shown in FIG. Further, the lock tube 33, the lock link 34, the locking pin 35, the connecting pin 36, and the link 40 constitute a raising / lowering means 42 of the pillow frame 38.

With the above construction, by rotating the lock link 34 forward about the support shaft 13, the connecting link 36 is pulled downward (direction of arrow C), and the pillow frame 38 is indicated by arrow E in FIG. Is rotated upright in the direction of
By rotating the lock link 34 rearward about the support shaft 13, the connecting link 36 is moved upward (in the direction of arrow D).
The pillow frame 38 is pushed backwards and tilted backward (in the direction of arrow F).

Next, the raising and lowering means 42 of the pillow frame 38.
The lock mechanism 43 will be described with reference to FIGS. 1, 2, 7, and 8.

In FIG. 7, a lock hole 44 is formed in the lock cylinder 33 at a predetermined position in the circumferential direction. The formation position of the lock hole 44 is the same as the pillow frame 38.
As shown in FIGS. 1 and 9, when the lock cylinder 33 is erected in a predetermined posture, the lock cylinder 33 rotates via the connecting link 36 and the lock link 34, and the lock hole 44 faces a lock pin 46 described later. It is set in such a position.

A lock pin storage frame 4 is provided on the lower surface of the elbow plate 4.
5 is fixed with screws or the like. The lock pin storage frame 4
5, a lock pin 46 is arranged in the circumferential rotation locus of the lock hole 44 so as to be slidable in the front-rear direction (GH direction), and the tip of the lock pin 46 is located in the lock hole 44.
It can be fitted and removed inside. Further, the lock pin 46 is constantly urged in the direction of the lock tube 33 by the urging means 47 composed of a coil spring, and when the lock hole 44 is aligned with the lock pin 46, it is locked by the urging force of the urging means 47. The pin 46 is automatically fitted into the lock hole 44.

The lock pin 46 is connected to the rear end of a rod 48 arranged in the front-rear direction along the elbow plate 4.
The front end of the rod 48 extends to a substantially central portion of the elbow plate 4 in the front-rear direction, that is, near the body adjustment knob 26, and an engaging portion 48a is formed at the tip thereof.

A release lever 49 is provided at a substantially central portion of the elbow plate 4 in the front-rear direction so as to rotate about a vertical spindle 50 in a horizontal plane. 49a engages with the engaging portion 48a of the rod 48, and the operating portion 49b, which is the outer end, projects outward from the elbow plate 4, that is, from the outside of the chair.

The rod 48 and the release lever 49 constitute a release mechanism 51.

With this configuration, when the user manually pushes the operating portion 49b of the release lever 49 backward (in the direction of arrow I) from the state shown in FIG. 7, the release lever 49 causes the support shaft 5 to move.
Rotating about 0, the rod 48 is pulled in the direction of arrow G by the engagement of the inner end 49a and the engaging portion 48a, and the lock pin 46 is disengaged from the lock hole 44. Further, when the lock hole 44 is aligned with the lock pin 46 when the user releases his / her hand from the operation portion 49b, the rod 48 is moved in the direction of the arrow H by the urging force of the urging means 47, and the lock pin 46 is moved.
Is fitted into the lock hole 44 and the release lever 49 returns to the state of FIG. 7.

In the illustrated embodiment, the lock mechanism 4 is
2, the release mechanism 51 is provided on the left and right sides of the chair, but it may be provided only on one side, for example, on the side where the seated user can operate the release mechanism 51 with the right hand.

The elbow plate 4, the seat frame 8, the back frame 14, and the pillow frame 38 are covered with a cushion material and a skin material, respectively, but these are for the sake of clarity of the structure of the present invention. The description is omitted.

Next, the operation will be described.

In the state shown in FIG. 1, the back frame 14 and the pillow frame 38 are erected at predetermined positions, and this erected state is locked by the lock mechanism 43 as shown in FIG.

To change from this state to the reclining state shown in FIG. 9, first, in the state shown in FIG. 1, the user sits on the seat formed by the seat frame 8 and rotates the physical condition knob 26 by the user's hand. Then, the sliding resistance of the adjusting member 21 is adjusted to a state suitable for the user. For example, in the case of a person such as an old man who has a weak force for returning to the original state from the reclining state due to the movement of the body, loosen the physical condition knob 26 and rotate it to adjust the sliding resistance of the adjusting member 21. The seat frame 8 can be made lighter by reducing or eliminating it.

Next, when the user leans against the backrest formed by the upper frame 14a of the back frame 14, the back frame 14 rotates about the support shaft 13 in the direction of arrow A in FIG. Inclining rearward (in the direction of arrow A) about the shaft 13, the lower frame 14b is attached to the support shaft 1
Rotate forward (in the direction of arrow A1) about 3. Due to the forward movement of the lower frame 14b, the seat frame 8 is pushed forward, and the seat frame 8 swings in a pendulum manner by the suspension member 7 and moves forward (direction of arrow A2).

At this time, since the seat frame 7 is suspended on the support shaft 6 and swings in a pendulum manner, for example, as compared with a structure in which the seat portion is slid on a long rail in the front-rear direction and moved back and forth, Resistance to forward and backward movement of the seat becomes extremely small. Therefore, particularly in the case of a weak person such as an old person, the physical condition knob 26 can be loosened to be in a reclining state with a weak leaning force.

Further, as described above, since the locking mechanism 43 prevents the lock link 34 from rotating, that is, the connecting link 36 is prevented from moving in the front-rear direction, as described above, Even if the upper frame 14a of 14 tilts rearward, the pillow frame 38 constituting the headrest follows and does not tilt, and the connecting link 3
The upright state is maintained by 6 as shown in FIG.

Therefore, as shown in FIG. 9, the backrest is in a reclining state, and the headrest is in a standing state in which it is easy to watch TV or read a book.

Next, when the headrest is tilted rearward from the state of FIG. 9, the seated user manually releases the lock mechanism 43.

This releasing operation moves the operating portion 49b of the releasing lever 49 from the state shown in FIG. 7 in the direction of arrow I. As a result, the release lever 49 rotates about the support shaft 50, and its locking portion 49a engages with the locking portion 48a of the rod 48 to move the rod 48 forward (direction of arrow G).
By this movement of the rod 48, the lock pin 46 is disengaged from the lock hole 44, the lock is released, and the lock cylinder 33 is freely rotated. Therefore, the pillow frame 38 that constitutes the headrest in a state where the unlocked state is maintained.
Is pressed in the direction of arrow F from the state of FIG. 9, the connecting link 36
Is pulled rearward, the locking link 34 pivots rearward (from the state of FIG. 8 to the G direction), and the pillow frame 38 tilts rearward. Therefore, as shown in FIG. 10, the headrest is also in a reclining state (complete resting posture).

Next, when the headrest is raised from the state shown in FIG. 10, only the pillow frame 38 constituting the headrest is manually moved in the direction of arrow E with the back frame 14 tilted as shown in FIG. When rotated and raised, the connecting link 36 is pushed downward (direction of arrow C), and the locking link 34 rotates backward (direction of arrow H from the state of FIG. 10).

The lock link 34 is attached to the lock tube 3
8 and the lock hole 44 of the lock cylinder 33 reaches a position facing the lock pin 46, the lock pin 46 is locked by the biasing means 47. It is fitted inside and the rotation of the lock tube 33 is blocked, and the upright state of the pillow frame 38 is locked.

From the state shown in FIG. 10, the pillow frame 38
When the back frame 14 is erected in the direction of arrow B with the back frame 14 tilted, the back frame 14 is erected while the front side of the upper frame 14a hits the locking pin 35 provided on the lock link 34, and the back frame 14 is erected. 34 from the state of FIG. 10 to the front (the direction of arrow H) to rotate the pillow frame 38.
To stand up. Then, the back frame 14 stands up to the state shown in FIG. 1, the locking link 34 rotates together with the lock cylinder 33 to the original position shown in FIG. 8, and the lock hole 44 of the lock cylinder 33 faces the lock pin 46. When reaching the position, the lock pin 46 is fitted into the lock hole 44 by the urging force of the urging means 47, the rotation of the lock cylinder 33 is blocked, and the upright state of the pillow frame 38 is maintained.

Therefore, it is possible to raise only the headrest from the state shown in FIG. 10 and set the standing state of the headrest to the reclining state shown in FIG. 9, or by raising the backrest from the state shown in FIG. As shown in FIG. 1, the backrest and the headrest may be upright, and the upright state of the headrest may be locked.

Further, even when the back frame is erected from a state in which the back frame is tilted at an angle between the sitting posture shown in FIG. 1 and the complete rest posture shown in FIG. 10, the headrest is tilted in the same manner as described above. Can be raised and the standing state can be locked.

[0057]

As described above, according to the present invention,
By making the resistance force by the adjusting means free, the movement of the seat in the front-back direction becomes lighter than that of the conventional rail system. Therefore, it becomes easy for an elderly person or the like who is particularly weak to get up from the reclining posture.

Further, by suspending and holding the seat by the suspending member, the structure can be simplified as compared with the rail system, the product cost can be reduced, and the occurrence of failures can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a normal sitting posture of a chair according to an embodiment of the present invention, which is shown by a frame portion for explanation.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view showing a means for adjusting the sliding force in FIG.

FIG. 4 is a sectional view taken along line KK in FIG.

5 is a view showing the holding member shown in FIGS. 3 and 4. FIG.

6 is a cross-sectional view taken along line LL shown in FIG.

7 is a sectional view taken along line MM in FIG.

8 is a sectional view taken along line NN in FIG.

9 is a side view showing a posture in which the backrest is laid down from the posture shown in FIG.

FIG. 10 is a side view showing a safe resting posture in which the headrest is laid down from the posture shown in FIG. 9;

[Explanation of symbols]

4 elbow board 6 Shafts that rotatably support suspension members 7 Hanging member 8 seat frame 14 back frame 14b Lower part of back frame 19 Clamping member 21 Adjustment member 26 Physical condition knob 31 Adjustment means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenji Noguchi             Meko, 18 Kawara, Fukugama-cho, Anjo City, Aichi Prefecture             Industry Co., Ltd. F term (reference) 3B099 AA03 BA08 CA36

Claims (3)

[Claims] 1. A back frame that is rotatably provided in the front-rear direction of the chair by a support shaft fixed to the rear portion of the chair and extends upward and downward from the support shaft, and an upper portion is rotatably connected to the fixed portion by the shaft. A hanging member that is vertically installed and swings in the front-rear direction around the upper portion; a seat frame that is rotatably connected to a lower portion of the hanging member and a lower portion of the back frame and is provided in a substantially horizontal state; A chair provided with an adjusting means for adjusting the resistance of the hanging member to swing. 2. The chair according to claim 1, wherein the suspension member is provided with its upper portion rotatably connected to a shaft provided on the lower portion of a fixed elbow frame. 3. The adjusting means is provided on the hanging member with an adjusting member that moves together with the hanging member, and on the fixing member,
A holding member that slidably holds the adjustment member is provided, a body adjustment knob is provided on the fixed member, and the operation of the body adjustment knob adjusts the holding force of the adjustment member by the holding member. Chair described in 2.