JP3967902B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair, and more particularly to a reclining chair in which a seat moves forward by tilting a backrest backward.
[0002]
[Prior art]
Conventionally, in the reclining chair as described above, as a structure for supporting the seat so as to be movable in the front-rear direction, a rail is provided on the fixed frame of the chair in the front-rear direction, and the seat is slidably mounted on the rail. The method is known.
[0003]
[Problems to be solved by the invention]
In the conventional structure in which the seat is slidably mounted on the rail, the sliding friction resistance is large. The return force when returning to is increased.
[0004]
For this reason, there is a problem that it is difficult to get up from a reclining posture, particularly in a user with weak power such as an elderly person.
[0005]
Therefore, the present invention has an adjustment mechanism that adjusts the moving force of the seat, and when the adjustment mechanism is made free, the movement of the seat in the front-rear direction is reduced compared to the conventional rail system, and particularly the force. The object is to provide a chair that can be easily raised even by elderly people with weakness.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the first invention according to claim 1 is provided so as to be rotatable 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. A back frame, an upper part is rotatably connected to a fixed part by a shaft, and is suspended. A suspension member that swings in the front-rear direction around the upper part, and a lower part of the suspension member and a lower part of the back frame are rotatable. A chair having a seat frame connected and provided in a substantially horizontal state, and an adjusting means for adjusting a resistance force against swinging of the suspension member ,
The pre-Symbol adjusting means, said suspending member, an adjusting member which moves together with該吊Ri member, the fixed member is provided with a clamping member for slidably sandwich the adjusting member, the physical condition knobs provided on the fixed member, the It is configured to adjust the holding force of the adjusting member by the holding member by operating a physical condition knob .
[0007]
In the present invention, it is possible to prevent the seat and the backrest from moving unnecessarily during use by adjusting the resistance against the swinging of the suspension member to an amount suitable for the user by the adjusting means.
[0008]
Further, by eliminating the resistance force by the adjusting means and allowing the suspension member to freely swing, the seat freely swings in a pendulum manner by the suspension member. Thus, by suspending and holding the seat and swinging it in a pendulum manner, the resistance to movement of the seat is reduced as compared with the conventional seat supported by a rail.
[0009]
A second invention of claim 2, wherein in the first invention, the suspension member, the upper, that is provided rotatably connected to the shaft provided in the lower part of the arm frame fixed It is a feature .
[0010]
According to a third aspect of the present invention, in the first or second aspect, the adjusting member and the clamping member are formed in a plate shape .
A fourth invention according to claim 4 is characterized in that, in any one of the first to third inventions, the adjusting means is provided in an upper portion of the seat frame.
A fifth invention according to claim 5 is characterized in that, in any one of the first to fourth inventions, the seat frame is inclined so that the front thereof is located above the rear. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described based on the examples shown in the drawings.
[0012]
1 and 2, reference numeral 1 denotes a pedestal of a chair, and a turntable 2 is provided on the pedestal 1 so as to be rotatable in a horizontal plane. As shown in FIG. 2, the side frame 3 is erected and fixed on both sides of the turntable 2, and a member constituting an elbow at the upper end of the side frame 3, in the example shown, a plate-like elbow plate 4 is a chair. It is arranged and fixed in the front-rear direction.
[0013]
A bearing 5 is fixed to the lower surface of a substantially central portion in the front-rear direction of the both elbow plates 4 and a support shaft 6 is horizontally provided on the bearing 5 in the left-right direction. The upper end portion is rotatably connected, and the suspension member 7 is rotatably provided so that the lower portion swings around the support shaft 6 in the front-rear direction. A seat frame 8, which is a member constituting a seat, is disposed at the lower end of the suspension member 7.
[0014]
A seat bracket 9 is fixed to the lower surface of the substantially central portion of the seat frame 8 in the front-rear direction, and the lower end portion of the suspension member 7 is connected to the seat bracket 9 so as to be rotatable by a horizontal pin 10 in the left-right direction. The seat frame 8 is supported by the suspension member 7. Therefore, the seat frame 8 is moved in the back-and-forth direction in a pendulum manner while being suspended by the suspension member 7. In addition, the said seat frame 8 is provided in the right and left of a chair as shown in FIG. 2, and is supported by the said suspension member 7 with which both sides were equipped. The left and right seat frames 8 are connected to each other by a connecting rod 11.
[0015]
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 disposed in the left-right direction of the chair. A back frame 14 constituting 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 with the support shaft 13 as a boundary, and a lower frame 14b extending downward, and the lower end of the lower frame 14b is formed at the lower end of the seat frame 8. It is rotatably connected by a horizontal connecting pin 15 provided at the rear end portion, and supports the rear portion of the seat frame 8.
[0016]
As shown in FIG. 2, the back frame 14 is arranged on the left and right sides of the chair, each of which is rotatably supported by the rear part of the elbow plate 4 by the structure, and the rear part of the left and right seat frames 8 Support.
[0017]
With the above configuration, when the upper frame 14a of the back frame 14 is tilted backward (arrow A direction) in FIG. 1, the lower frame 14b moves forward (arrow A1 direction) and the seat frame 8 moves forward in the arrow A2 direction. When the upper frame 14a is erected forward (in the direction of arrow B), the lower frame 14b is moved backward (in the direction of arrow B1), and the seat frame 8 is moved backward in the direction of arrow B2.
[0018]
Next, the detail of the structure of each part is demonstrated.
[0019]
An inverted U-shaped body knob mounting bracket 16 as shown in FIGS. 3 and 4 is formed by spot welding or the like on the substantially central portion of the elbow plates 4 in the front-rear direction, that is, the lower surface near the rear of the suspension member 7. It is fixed and suspended. As shown in FIG. 4, a bearing 16a disposed horizontally in the left-right direction of the chair is fixed to the lower end portion of the physical condition knob mounting bracket 16, and a bolt 17 is loosely fitted to the bearing 16a. A presser member 18 is fixed to the inner end 17a of the bolt 17 by caulking, welding or the like.
[0020]
Between the pressing member 18 and the physical condition knob mounting bracket 16 are made of a material having a high frictional resistance such as resin, and three side-shaped clamping members 19 shown in FIG. 5 are arranged. Two adjusting members 21 each having a long hole 21 a as shown in FIG. 3 are interposed between the holding members 19. The pressing member 18, the clamping member 19, and the adjusting member 21 are each formed in a plate shape.
[0021]
A front portion of the adjustment member 21 is rotatably connected to the suspension member 7 by a pin 22, and a rear portion is a free end.
[0022]
Then, the clamping member 19 and the adjustment member 21 are supported by the bolt 17 by allowing the bolt 17 to pass through the hole 19a formed in the both clamping members 19 and the long hole 21a formed in the adjustment member 21 in a loose fit. ing.
[0023]
An anti-rotation bolt 23 is provided on the upper portion of the presser member 18, and the anti-rotation bolt 23 is loosely fitted in a hole 24 formed in the upper portion of the holding member 19 and is screwed onto the physical condition knob mounting bracket 16. The bolt 17, the pressing member 18, and the clamping member 19 are prevented from rotating around the axis of the bolt 17.
The adjustment member 21 may be a single sheet, and the single adjustment member 21 may be sandwiched between the two clamping members 19. When the number of the adjusting members 21 is two and the number of the holding members 19 is three as in the above-described embodiment, the braking area of the adjusting member 21 can be increased and the adjustment of the swing of the seat frame 8 can be facilitated.
[0024]
A physical condition knob 26 is provided at the outer end of the bolt 17. A mounting hole 27 is formed in the shaft center portion of the physical 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. The physical condition knob 26 is screwed to the outer end of the bolt 17 by the nut 29.
[0025]
With the above structure, when the physical condition knob 26 is rotated in the tightening direction, the contact portion 28 contacts the outer surface of the physical condition knob mounting bracket 16 via the plate 30, and the bolt 17 is pulled toward the physical condition knob 26 by the nut 29. The pressing member 18 presses the clamping member 19 and the adjusting member 21 against the physical condition knob mounting bracket 16 side. Therefore, when the tightening degree (amount) of the physical condition knob 26 is increased, the frictional resistance between the clamping member 19 and the adjustment member 21 is increased, the resistance force against the sliding of the adjustment member 21 is increased, and the physical condition knob 26 is loosened. And the resistance force with respect to the sliding of the adjustment member 21 becomes small.
[0026]
The body condition knob 26, the bolt 17, the clamping member 19, the adjustment member 21 and the like constitute a mechanism for adjusting the force by which the seat frame 8 can be slid in the front-rear direction. The adjusting means 31 for adjustment is used. The adjusting means 31 is provided on the left and right sides of the chair as shown in FIG.
[0027]
Next, the peripheral structure of the bearing 12 will be described with reference to FIGS.
[0028]
7 is an enlarged sectional view taken along line MM in FIG. 1, and FIG. 8 is a sectional view taken along line NN in FIG.
[0029]
In FIG. 7, reference numeral 4 denotes the elbow plate, and a bearing 12 is fixed to the rear end of the elbow plate 4. A support shaft 13 is horizontally disposed on the bearing 12 in the left-right direction of the chair, and the support shaft 13 is inserted into the bearing 12 at its outer end and fixed to the bearing 12 by a pin 32 so that it cannot rotate. Is provided. The back frame 14 is rotatably provided at the inner end of the support shaft 13.
[0030]
A lock cylinder 33 is rotatably fitted on the outer periphery of the support shaft 13 between the bearing 12 and the back frame 14 of the support shaft 13, and the outer end of the lock cylinder 33 rotates into the bearing 12. The locking 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 cylinder 33, that is, the support shaft 13, and a locking pin 35 crosses the front side (front surface) of the back frame 14 at the upper end thereof. It is provided to do. The other end of the locking pin 35 is rotatably connected to a lower portion of a connecting link 36 disposed substantially parallel to the back frame 14 by a pin 37.
[0031]
In FIG. 1, a pillow frame 38 is provided on the upper portion of the back frame 14 so as to be rotatable by a pin 39, and the pillow frame 38 is provided so as to be able to be tilted up and down around the pin 39. A link 40 protrudes and is fixed to the lower part of the pillow frame 38, and the upper part of the connection link 36 is rotatably connected to the front part of the link 40 by a pin 41.
[0032]
The bearing 12, the support shaft 13, the lock cylinder 33, the lock link 34, the locking pin 35, the 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 cylinder 33, the lock link 34, the locking pin 35, the connecting pin 36, and the link 40 constitute an erecting means 42 for the pillow frame 38.
[0033]
With the above configuration, the locking link 34 is rotated forward about the support shaft 13, whereby the connecting link 36 is pulled downward (in the direction of arrow C), and the pillow frame 38 stands up in the direction of arrow E in FIG. The link link 36 is pushed upward (in the direction of the arrow D) and the pillow frame 38 is moved back (in the direction of the arrow F). It is designed to rotate.
[0034]
Next, the lock mechanism 43 of the raising / lowering means 42 of the pillow frame 38 will be described with reference to FIGS. 1, 2, 7, and 8.
[0035]
In FIG. 7, a lock hole 44 is formed in the lock cylinder 33 at a predetermined position in the circumferential direction. The lock hole 44 is formed at a position where the lock cylinder 33 is rotated via the connecting link 36 and the lock link 34 when the pillow frame 38 is erected in a predetermined posture as shown in FIGS. Thus, the lock hole 44 is set at a position facing a lock pin 46 described later.
[0036]
A lock pin housing frame 45 is fixed to the lower surface of the elbow plate 4 with screws or the like. In the lock pin housing frame 45, a lock pin 46 is disposed in the circumferential rotation locus of the lock hole 44 so as to be slidable in the front-rear direction (GH direction). The portion can be fitted into and detached from the lock hole 44. Further, the lock pin 46 is always urged in the direction of the lock cylinder 33 by the urging means 47 formed of a coil spring. When the lock hole 44 matches the lock pin 46, the lock pin 46 is locked by the urging force of the urging means 47. The pin 46 is automatically fitted into the lock hole 44.
[0037]
The lock pin 46 is connected to a rear end of a rod 48 arranged in the front-rear direction along the elbow plate 4. The front end of the rod 48 is extended to a substantially central portion in the front-rear direction of the elbow plate 4, that is, the vicinity of the physical condition knob 26, and an engaging portion 48a is formed at the tip thereof.
[0038]
A release lever 49 is provided at a substantially central portion in the front-rear direction of the elbow plate 4 so as to rotate in a horizontal plane about the vertical support shaft 50, and the inner end side 49 a is interposed between the support shaft 50 and the inner end side 49 a. The engaging portion 48a of the rod 48 is engaged, and an operation portion 49b which is an outer end protrudes outward from the elbow plate 4, that is, from the outside of the chair.
[0039]
The rod 48 and the release lever 49 constitute a release mechanism 51.
[0040]
With this configuration, when the user manually pushes the operation 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 rotates about the support shaft 50, The rod 48 is pulled in the direction of arrow G by the engagement between the inner end 49 a and the engaging portion 48 a, and the lock pin 46 is detached from the lock hole 44. Further, when the lock hole 44 matches the lock pin 46 with the user releasing the operation part 49b, the rod 48 moves in the direction of arrow H by the urging force of the urging means 47, and the lock pin 46 is locked. The release lever 49 is returned to the state shown in FIG.
[0041]
In the illustrated embodiment, the lock mechanism 43 and the release mechanism 51 are provided on the left and right sides of the chair as shown in FIG. 2, but one side, for example, a seated user can operate the release mechanism 51 with the right hand. It may be provided only on the side.
[0042]
The elbow plate 4, the seat frame 8, the back frame 14, and the pillow frame 38 are covered with a cushioning material and a skin material, respectively, but these are omitted for easy understanding of the structure of the present invention. did.
[0043]
Next, the operation will be described.
[0044]
The state shown in FIG. 1 is a state in which the back frame 14 and the pillow frame 38 stand in a predetermined position, and the standing state is locked by the lock mechanism 43 as shown in FIG.
[0045]
When the reclining state shown in FIG. 9 is made from this state, the user first sits on the seat formed by the seat frame 8 in the state shown in FIG. 1 and adjusts by rotating the physical condition knob 26 with the user's hand. The sliding resistance of the member 21 is adjusted to a state suitable for the user. For example, in the case of a person such as an elderly person who is weak in the reclining state due to the movement of the body or returning from this state to the original state, the physical adjustment knob 26 is loosened and rotated to increase the sliding resistance force of the adjusting member 21. Reduce or eliminate the movement of the seat frame 8 in the front-rear direction.
[0046]
Next, when the user leans against the backrest formed by the upper frame 14 a of the back frame 14, the back frame 14 rotates about the support shaft 13 in the direction of arrow A in FIG. 1, and the upper frame 14 a rotates the support shaft 13. It tilts backward (in the direction of arrow A) as the center, and the lower frame 14b rotates forward (in the direction of arrow A1) about the support shaft 13. The seat frame 8 is pushed forward by the forward movement of the lower frame 14b, and the seat frame 8 swings in a pendulum manner by the suspension member 7 and moves forward (in the direction of arrow A2).
[0047]
At this time, since the seat frame 7 is suspended from the support shaft 6 and swings in a pendulum manner, for example, the seat portion is moved forward and backward by sliding on a long rail in the front-rear direction. The resistance to movement is extremely small. Therefore, especially in the case of a weak person such as an elderly person, the physical condition knob 26 can be loosened to make a reclining state with a weak leaning force.
[0048]
Further, since the rotation of the locking link 34 is blocked by the lock mechanism 43 as described above, that is, the movement of the connecting link 36 in the front-rear direction is blocked, the upper portion of the back frame 14 is moved as described above. Even if the frame 14a is tilted rearward, the pillow frame 38 constituting the headrest does not tilt following the tilt, and the standing state is maintained by the connecting link 36 as shown in FIG.
[0049]
Therefore, as shown in FIG. 9, the backrest is in a reclining state, and the headrest is in an upright state where it is easy to watch TV or read.
[0050]
Next, when the headrest is tilted backward from the state of FIG. 9, the seated user releases the lock mechanism 43 by hand.
[0051]
This release operation moves the operation portion 49b of the release lever 49 from the state shown in FIG. As a result, the release lever 49 rotates about the support shaft 50, and the locking portion 49a engages with the locking portion 48a of the rod 48 to move the rod 48 forward (in the direction of arrow G). By the movement of the rod 48, the lock pin 46 is detached from the lock hole 44, the lock is released, and the lock cylinder 33 can be freely rotated. Therefore, when the pillow frame 38 constituting the headrest is pushed in the direction of arrow F from the state shown in FIG. 9 while the unlocked state is maintained, the connecting link 36 is pulled backward and the locking link 34 is moved backward (see FIG. 8). The pillow frame 38 is tilted backward. Therefore, as shown in FIG. 10, the headrest is also in a reclining state (complete resting posture).
[0052]
Next, when the headrest is erected from the state shown in FIG. 10, only the pillow frame 38 constituting the headrest is rotated in the direction of arrow E by hand while the back frame 14 is tilted as shown in FIG. Then, the connecting link 36 is pushed downward (arrow C direction), and the locking link 34 rotates backward (arrow H direction from the state of FIG. 10).
[0053]
When the lock 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 reaches a position facing the lock pin 46, the biasing means 47 is attached. Due to the force, the lock pin 46 is fitted into the lock hole 44 to prevent the lock cylinder 33 from rotating, and the standing state of the pillow frame 38 is locked.
[0054]
When the back frame 14 is raised in the direction of arrow B with the pillow frame 38 tilted from the state shown in FIG. 10, the front side of the upper frame 14a hits the locking pin 35 provided on the lock link 34. While the back frame 14 is raised, the lock link 34 is rotated forward (in the direction of arrow H) from the state shown in FIG. 10 to raise the pillow frame 38. Then, the back frame 14 stands up to the state shown in FIG. 1, the lock link 34 rotates to the original position shown in FIG. 8 together with the lock cylinder 33, and the lock hole 44 of the lock cylinder 33 faces the lock pin 46. When the position is reached, the urging force of the urging means 47 fits the lock pin 46 into the lock hole 44 to prevent the lock cylinder 33 from rotating, and the pillow frame 38 is held upright.
[0055]
Therefore, only the headrest can be raised from the state shown in FIG. 10, and the reclining state shown in FIG. 9 in which the standing state of the headrest is locked can be obtained. Further, by raising the backrest from the state shown in FIG. As shown in FIG. 4, the backrest and the headrest can be raised, and the standing state of the headrest can be locked.
[0056]
Further, even if the back frame stands up from a state where it is inclined at an angle between the sitting posture shown in FIG. 1 and the complete resting posture shown in FIG. 10, the headrest tilted in the same manner as described above is raised. The standing state can be locked.
[0057]
【The invention's effect】
As described above, according to the present invention, the movement of the seat in the front-rear direction becomes lighter than that of the conventional rail system by freeing the resistance force by the adjusting means. Therefore, it becomes easy to get up from the reclining posture, particularly in elderly people with weak power.
[0058]
Further, by suspending and holding the seat with the suspension member, the structure can be simplified as compared with the rail system, the product cost can be reduced, and the occurrence of failure can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing a normal sitting posture in a chair according to an embodiment of the present invention, which is shown by a frame portion for explanation.
2 is a front view of FIG. 1. FIG.
FIG. 3 is a side view showing a slide force adjusting means in FIG. 1;
4 is a sectional view taken along the line KK in FIG. 3;
5 is a view showing the clamping member shown in FIGS. 3 and 4. FIG.
6 is a cross-sectional view taken along line LL shown in FIG.
7 is a cross-sectional view taken along line MM in FIG.
8 is a cross-sectional view taken along line NN in FIG.
9 is a side view showing a posture in which the backrest is lying down from the posture of FIG. 1. FIG.
10 is a side view showing a safety resting posture with the headrest lying down from the posture of FIG. 9;
[Explanation of symbols]
4 Elbow plate 6 Shaft for rotatably supporting the suspension member 7 Suspension member 8 Seat frame 14 Back frame 14b Lower portion of back frame 19 Holding member 21 Adjustment member 26 Physical condition knob 31 Adjustment means

Claims (5)

A back frame that is provided so as to be rotatable in the front-rear direction of the chair by a support shaft fixed to the rear portion of the chair, and an upper portion is vertically connected to the fixed portion so as to be rotatable by the shaft. A suspension member that swings in the front-rear direction around the upper part, a seat frame that is rotatably connected to the lower part of the suspension member and the lower part of the back frame, and is provided in a substantially horizontal state, and the swinging of the suspension member A chair having adjusting means for adjusting the resistance to
The pre-Symbol adjusting means, said suspending member, an adjusting member which moves together with該吊Ri member, the fixed member is provided with a clamping member for slidably sandwich the adjusting member, the physical condition knobs provided on the fixed member, the A chair configured to adjust a holding force of the adjusting member by the holding member by an operation of a physical condition knob . 2. The chair according to claim 1, wherein 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. The chair according to claim 1 or 2, wherein the adjusting member and the clamping member are formed in a plate shape . The chair according to any one of claims 1 to 3, wherein the adjusting means is provided on an upper portion of the seat frame . The chair according to any one of claims 1 to 4, wherein the seat frame is inclined so that the front thereof is located above the rear .

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