JP2000342375A - Armrest of multi-purpose chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a foreign material from being caught when an armrest is kept in the horizontal condition and the backrest is displaced. SOLUTION: The top of an upper arm 63 of an armrest frame 60 is fixed to a horizontal shaft member 56 mounted in the backrest frame 9 of this multi- purpose chair, and a lower arm 64 is pivotally attached under the upper arm 63 with the base of the lower arm 64 fixed to a horizontal shaft member 65. The horizontal shaft member 65 is attached below a horizontal shaft 10, the center of rotation of the backrest frame 9, rotatably in the side of an upper part support frame 6 on the backside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multipurpose chair armrest.

[0002]

2. Description of the Prior Art U.S. Pat.
In Japanese Patent Publication No. 7 (1995), a backrest frame and a footrest frame are rotatably mounted on a seat frame, and an armrest frame is provided on a side of the seat frame. A configuration attached to a moving arm is described.

[0003]

In the above-mentioned known example, the armrest is configured to be positioned at substantially the same angle even when the backrest frame and the footrest frame rotate, respectively, so that the armrest is treated. When the patient sits down and leans the backrest, there is a problem that the angle of the arm changes. Also, since the space formed by the armrest frame, the front rotation arm, and the rear rotation arm changes depending on the angle of the backrest, it is highly likely that a foreign object will be pinched when inserted into this space from the side. There are challenges.

[0004]

An object of the present invention is to keep an armrest in a horizontal state and prevent foreign objects from being caught due to displacement of a backrest.

[0005]

According to the present invention, an upper support frame 6 is provided above a support lower frame 2 mounted on a floor, and a backrest frame 9 and a seat frame 20 are rotated on the upper support frame 6. The multi-purpose chair frame, which is freely attached, the base of the foot frame 22 is rotatably provided on the front side of the seat frame 20, and the step frame 24 is provided at the tip of the foot frame 22, An armrest frame 60 is provided on one or both sides of the left and right sides. The armrest frame 60 fixes an upper part of the upper arm 63 to a horizontal shaft member 56 provided on the backrest frame 9, and a lower part of the lower part of the upper arm 63. Arm 6
4, and the base of the lower arm 64 is fixed to the horizontal shaft member 65. The horizontal shaft member 65 is located below the horizontal shaft 10 at the center of rotation of the backrest frame 9 and on the rear upper support frame. 6
The armrest of the multipurpose chair is configured so as to be rotatable on the side and arranged so that the lower arm 64 in a side view substantially overlaps with the backrest frame 9 when the backrest frame 9 is most upright. In the present invention, the horizontal shaft member 56 and the horizontal shaft member 65 are protruded laterally by a predetermined length with respect to the backrest frame 9 so that a gap is provided between the upper arm 63 and the lower arm 64 and the backrest frame 9. The armrest of a multi-purpose chair formed with.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Is a multipurpose chair frame body such as a treatment chair used when a dialysis patient or a dental consultation patient receives treatment, or a relaxed chair that relaxes and sits, and 2 is a lower support frame that constitutes a part of the multipurpose chair frame body. The supporting lower frame 2 is mounted on the floor with a front leg 3 adjustable in height on the front side and a rolling wheel 4 on the rear side. The supporting lower frame 2 has an optional lifter mechanism 5
The upper support frame 6 is provided via the. The upper support frame 6 has a pair of left and right front and rear rods 7 in the front and rear direction.
Is provided so as to move up and down with respect to the supporting lower frame 2 via the lifter mechanism 5. A rear bracket 8 is fixed to a rear portion of the front and rear rods 7, and a lower portion of a backrest frame 9 is rotatably mounted on an upper portion of the rear bracket 8 by a horizontal shaft 10.
A reclining motor 11 is rotatably mounted by a shaft 12 at the left and right center positions on the rear surface (back surface) side of the backrest frame 9, and the reclining motor 11 has a reclining rod 13 that expands and contracts by rotation of the reclining motor 11. Is provided, and the reclining rod 13 is projected downward, and is axially attached to the tip of the mounting rod 14 by the shaft 15,
The base of the mounting rod 14 is fixed to the horizontal rod 16, and both ends of the horizontal rod 16 are fixed to the rear bracket 8 below the horizontal shaft 10.

Accordingly, the rear bracket 8 between the horizontal shaft 10 and the shaft 15, the backrest frame 9, and the reclining rod 13 of the reclining motor 11
And the mounting rod 14 constitute a reclining link. The horizontal shaft 10 is positioned above the front side of the shaft 15, and the shaft 15 is moved as far as possible within a range where the reclining rod 13 does not interfere with the backrest frame 9. Close the rod 16 and attach the mounting rod 1
The length of the member 4 protruding to the rear side of the backrest frame 9 is reduced by shortening the length of the backrest frame 9. Thus, an upright portion 19 rising upward is provided on the upper surface on the base side of each upper support frame 6.
Are fixed, and the rear ends of a pair of left and right seat frames 20 in the front-rear direction are rotatably mounted on the upper end of each upright portion 19 by a shaft 21. On the front side of the seat frame 20, upper portions of a pair of left and right footrest frames 22 are rotatably mounted by a shaft 23. An intermediate portion of a pair of left and right mounting rods 25 in the front-rear direction provided on the step frame 24 is rotatably mounted on a lower portion of the footrest frame 22 by a shaft 26. A pair of right and left regulating arms 2 are provided on the front side of the upper support frame 6.
7 is rotatably mounted on a shaft 28, and the lower portion of the regulating arm 27 is mounted on a long hole 29 provided at the rear of the mounting rod 25 by a shaft 30. A pair of right and left mounting members 31 is fixed to the rear bracket 8 or each upper support frame 6, a bracket 32 is fixed to the mounting member 31, and a tilting motor 33 is
4, the tilt motor 33 is provided with a tilt rod 35 which expands and contracts by the rotation of the tilt motor 33. The tilt rod 35 projects forward and is attached to the tip of a pair of left and right intermediate arms 36. It is axially mounted on a shaft 37, and the base of the intermediate arm 36 is fixed to a horizontal rod 38. The horizontal rod 38 is fixed to the upper part of the left and right footrest frame 22.

As described above, the seat frame 20, the tilt rod 35, the intermediate arm 36, the shafts 21 and 34
The seat support link is formed by the upper support frame 6 and the fixing portion of the mounting member 31 between them. In this case, when the tilt rod 35 is extended, the footrest frame 22 rotates about the shaft 23, and when the seat frame 20 and the footwear frame 22 are in a horizontal state with each other, the entirety is centered on the shaft 21 in this state. A rotation restricting stopper 40 is provided on the shaft 23 so as to rotate upward (FIG. 9). In the embodiment, the seat frame 2
0, the base of the one-side contact member 42 protruding forward is fixed to the front side horizontal frame rod 41, and the base of the other side contact member 43 is fixed to the horizontal rod 38 of the footrest frame 22. When the contact member 42 and the other contact member 43 come into contact with each other, the upward rotation of the foot frame 22 with respect to the seat frame 20 is stopped, and the seat frame 20 and the foot frame 22 are rotated about the shaft 21. Move. Also, the seat frame 20 is bent so that the front end portion is inclined so as to be higher as it reaches the front side, and when the seat frame 20 is rotated downward in combination with the arrangement of the shafts 23 and 37, the seat frame 20 reaches a predetermined position. 2
The rotation of the footrest frame 22 is restricted by rotating the zero and the footrest frame 22 downward integrally. The seat frame 20 pivots upward about the axis 21. In the seating mode, the seat frame 20 is tilted upward so as to raise the front end by a predetermined amount. In the bed mode, the seat frame 20 and the footrest frame are rotated. 22 is substantially horizontal.

For this purpose, a roller 45 is attached to the end of each of the intermediate arms 36, and a guide plate 46 is provided on the movement line of the roller 45, and the roller 45 comes into contact with the guide plate 46, thereby rotating the seat frame 20 upward. Move. That is, when the seat frame 20 is in the substantially horizontal bed mode, a virtual moving arc trajectory R of the roller 45 at the center of the shaft 23 is drawn (FIG. 12), and the virtual moving arc trajectory R is guided inward toward the shaft 23. When the plate 46 is arranged, the tilt rod 35
Even if is reduced, the seat frame 20 can be rotated upward, and the guide plate 46 has
The front side is lowered, and the front side (lower part) of the inclined part 47 is retracted downward (outward) from the virtual moving arc locus L to form a rear part on the rear side. It is arranged so as to be close to the axis 23 in the virtual moving arc locus L according to the infinity. Therefore, when the tilt rod 35 is reduced, not only does the footrest frame 22 rotate about the shaft 23, but also the roller 45 contacts the guide plate 46 and the roller 4
5 is converted into an upward movement, whereby the shaft 23 is moved upward. As a result, the seat frame 20 can be rotated upward while the footrest frame 22 is rotated downward. In the seating mode, the front end is inclined forward and high.

The guide plate 46 has a rear end fixed to a reinforcing rod 48 fixed to the upper surface of the left and right upper support frames 6, and the reinforcing rod 48 is used to move the seat frame 20 when shifting from the sitting mode to the bed mode. A stopper function for preventing downward rotation is also used, whereby only the footrest frame 22 is rotated upward. The front end of the guide plate 46 is fixed to a mounting rod 49 provided on the upper support frame 6. The left and right ends of the mounting rod 49 are fixed to the upper support frame 6, and an intermediate portion thereof projects forward and is inclined so as to become lower toward the front in a side view. The tilt rod 35 is located between the pair of guide plates 46. Since the footrest frame 22 rotates about the shaft 23 by the expansion and contraction of the tilt rod 35 as described above, the footrest link is formed by the tilt rod 35, the intermediate arm 36, and the footrest frame 22. When the mode is changed from the bed mode to the sitting mode, the regulating arm 27 is
Abuts on the mounting rod 49 to stop the downward rotation. Thus, the step frame 24 is moved from the sitting mode to
Until the footrest frame 22 is flush with the seat frame 20, it moves up and down while maintaining a substantially horizontal state with the floor surface. Also, the footrest frame 22 and the seat frame 20 are configured to rotate further upward while being flush with each other.

That is, the footrest frame 22 and the mounting rod 25
And the regulating arm 27 constitute a step link, and the regulating frame 27 holds the step frame 24 in a horizontal state. A mounting rod 25 is attached to a lower end of the footrest frame 22 via a stay 53 which is inclined so as to be located on the front side as it goes downward. The rod 25 comes into contact with the footrest frame 22 and stops, and the step frame 24 is kept flush with the footrest frame 22. The multi-purpose chair frame body 1 can operate the backrest frame 9 and the seat frame 20 independently, but the seat frame 20 and the footrest frame 2 are substantially horizontal.
The bed mode is attained by making the step frame 2 and the step frame 24 flush with each other, but the mode is also shifted to the exhibition mode in which the step frame 24 side is high and the backrest frame 9 side is low. A bracket 55 is fixed to one or both sides of the backrest frame 9,
The inner end of the horizontal shaft member 56 is rotatably mounted on the upper portion of the bracket 55, and a substantially middle portion of the mounting frame 57 in the front-rear direction is fixed to the outer end side of the horizontal shaft member 56. Mounting frame 5
Numeral 7 is formed in the shape of a quadrangular cylinder, and an armrest frame 60 is rotatably mounted to the rear of the mounting frame 57 via a bracket 58. At a predetermined position of the armrest frame 60, a front stopper 61 that contacts the mounting frame 57 is provided, and the front stopper 61 contacts the mounting frame 57 to bring the armrest frame 60 to a horizontal state. In the embodiment, the front stopper 61 is screwed into and out of the armrest frame 60 so that the front stopper 61 can be moved in and out to adjust the angle of the armrest frame 60.

The bracket 58 is provided with a stopper plate 62 which comes into contact with the upper surface of the mounting frame 57, and the stopper plate 62 is brought into contact with the mounting frame 57 to hold the armrest frame 60 in an upright state. Thus, the armrest frame 60 is configured to maintain a horizontal state regardless of the inclination angle of the backrest frame 9. The upper part of the upper arm 63 is fixed to the horizontal shaft member 56, the lower arm 64 is mounted on the lower part of the upper arm 63, and the base of the lower arm 64 is fixed to the horizontal shaft member 65.
Is rotatably mounted on the rear bracket 8 below the horizontal shaft 10 and on the rear side. The upper arm 63, the lower arm 64, the rear bracket 8, and the fixed portion between the horizontal shaft 10 and the horizontal shaft member 56 constitute an armrest link. When the armrest link is arranged so that the lower arm 64 in side view substantially overlaps with the backrest frame 9 in the sitting mode, that is, when the backrest frame 9 is most erected, the overall size is reduced, and , Lower arm 64
Foreign matter can be prevented from being inserted between the backrest frame 9 and
It is suitable. The horizontal shaft member 56 and the horizontal shaft member 65 are protruded laterally by a predetermined length with respect to the backrest frame 9 to form a gap between the upper arm 63 and the lower arm 64 and the backrest frame 9. When the backrest frame 9 is raised, it is possible to prevent foreign matter from entering the space surrounded by the armrest link, which is preferable. Further, in the embodiment, the horizontal shaft member 56 and the horizontal shaft member 65 are formed of a shaft cylinder member, and a bolt (not shown) is inserted therethrough, and the bolt is screwed into a fixing portion to form the horizontal shaft member 56. The horizontal shaft member 65 is configured to be rotatable.

The backrest frame 9, seat frame 20, footrest frame 22, step frame 24
A cushion material such as urethane is attached to the armrest frame 60, and the outer periphery of the cushion material is surrounded by a skin member. In this case, the back skin member 71 surrounding the back cushion member 70 of the backrest frame 9 is engaged with the rear surface of the backrest frame 9 through a gap between the lower part of the back cushion member 70 and the seat frame 20, and The front end of the intermediate skin member 74 is locked to the seat skin member 73 surrounding the seat cushion material 72, and the rear end of the intermediate skin member 74 is above the locking portion of the backrest frame 9 of the back skin member 71. To lock. Therefore, the foreign matter entering the gap between the backrest frame 9 and the seat frame 20 is prevented from falling downward by the intermediate skin member 74, and the malfunction of the lifter mechanism 5, the reclining link and the like is prevented. Also,
A front intermediate skin member 75 is attached to the front end of the seat skin member 73.
The front end of the front intermediate skin member 75 is engaged with the footrest skin member 76 of the footrest frame 22, and a lower surface (rear surface) of an intermediate portion of the front intermediate skin member 75 is provided with a sheet fastener or the like. A one-side locking member 77 is provided, and the one-side locking member 77 is locked to the other-side locking member 79 provided on the needle punch 78, and the front intermediate skin member 75 is provided between the seat frame 20 and the footrest frame 22. And prevents the front intermediate skin member 75 from floating when in the bed mode.

Thus, the step frame 24 comprises:
A left and right supporting leg 80 is provided between the pair of mounting rods 25 so as to protrude downward.
Reference numeral 5 is located at a predetermined interval inside (center side) from the outer peripheral edge of the step frame 24 in plan view. That is, since the step frame 24 moves up and down, the support leg 80 and the mounting rod 25 are positioned inside (center side) of the step frame 24 by a predetermined distance from the outer peripheral edge in a plan view. The outer peripheral edge of the frame 24 is prevented from coming into contact with the shin portion of the person standing near the multipurpose chair frame body 1 so as not to fall on the foot. Thus, on either one of the left and right sides of the seat frame 20, a tubular member 81 penetrating vertically is provided, and the tubular member 81 is inserted through the outer tubular member 82 and fixed by bolts 83 or the like (the height can be adjusted). But cannot rotate). A flange 84 is provided at the upper end of the outer cylindrical member 82. A table frame 8 with a table 85 attached to the outer cylindrical member 82
6 is inserted through the vertical cylinder portion 87. A flange portion 88 is provided at an arbitrary position in the vertical middle of the vertical axis tube portion 87. A ring-shaped holding receiver 89 made of a synthetic resin is inserted into the vertical cylinder portion 87, and the holding receiver 89 is vertically held by the flange 88 and the flange 84.
A synthetic resin collar 90 is inserted through the lower end opening of the outer cylindrical member 82, and a bolt 91 is inserted through the collar 90.
The bolt 91 is screwed into a screw groove 92 provided on the inner periphery of the lower end of the vertical cylinder portion 87. Therefore, when the bolt 91 is tightened, the distance between the bolt 91 and the holding receiver 89 is reduced, and the frictional resistance between the lower surface of the flange 88 and the holding receiver 89 is reduced.
Further, the frictional resistance between the bolt 91 and the collar 90 is increased, and the torque for rotating the longitudinal axis portion 87 with respect to the outer cylindrical member 82 is increased, so that the table 85 is moved with a constant force. In this case, the bolt 91 is connected to the table frame 86.
To rotate together with the vertical axis cylindrical portion 87,
The shaft portion 93 having no thread groove is inserted into the collar 90.

[0015]

Next, the operation will be described. Reclining motor 1
When 1 is rotated, the reclining rod 13 contracts, and the backrest frame 9 rotates rearward (downward) about the horizontal axis 10. In this case, since the reclining motor 11 is mounted on the upper part of the backrest frame 9, the seat frame 20
The space below and other surrounding areas can be used effectively, and the whole is made smaller. Further, the backrest frame 9 has a bracket 55 rotatably mounted on the upper support frame 6 side by the horizontal shaft 10,
Since the horizontal axis 10 is located on the front side of the backrest frame 9, the length of the mounting rod 14 can be made as short as possible to form a reclining link. Therefore, the shaft 15 for pivotally mounting the mounting rod 14 and the reclining rod 13 can be as close as possible to the horizontal rod 16 as long as the reclining rod 13 does not interfere with the backrest frame 9.
The length of the backrest frame 9 is preferably reduced by shortening the length of the backrest frame 9 to reduce the amount of protrusion of the member protruding to the rear side of the backrest frame 9. When the reclining motor 11 is rotated in the reverse direction, the reclining rod 13 extends, and the backrest frame 9 rotates forward (upward) about the horizontal axis 10. Thus, the tilt motor 3
When 3 is rotated, the tilt rod 35 extends. Since the tilt rod 35 pushes the intermediate arm 36 forward,
The intermediate arm 36 rotates forward about the shaft 23. Therefore, the foot frame 22 starts to rotate upward about the shaft 23.

In this case, the shaft 37 of the mounting portion between the tilt rod 35 and the intermediate arm 36 is about to rotate forward about the shaft 23, but the intermediate arm 36 is provided with a roller 45,
Since the guide plate 46 is provided on the inner side closer to the shaft 23 than the imaginary moving arc locus L which moves to the center of the shaft 23 attachment portion of the roller 45, the roller 45 is guided by the guide plate 46,
It moves diagonally downward along the slope of 6. This allows shaft 2
3 descends, and the seat frame 20 initially rising forward pivots downward at the front end about the shaft 21. When the seat frame 20 rotates downward and comes into contact with the reinforcing rod 48, the rotation of the seat frame 20 stops. Therefore, until the seat frame 20 is rotated from the forward raised state to the horizontal state, the tilt rod 3
When the extension 5 is extended, the footrest frame 22 pivots upward around the shaft 23, while the seat frame 20 pivots downward around the shaft 21. Next, when the tilt rod 35 is further extended, the rotation of the seat frame 20 is prevented by the reinforcing rod 48, so that only the footrest frame 22 is supported by the shaft 2.
Rotate upward about 3 centers. When the footrest frame 22 is rotated upward until it is in a horizontal state with the seat frame 20, the shaft 2
The seat frame 2 is rotated by the rotation restricting stopper 40 provided on the seat frame 2.
Since the rotation of the footrest frame 22 with respect to 0 stops,
When the tilt rod 35 further extends, the footrest frame 22 rotates upward together with the seat frame 20 about the shaft 21.

The intermediate portion of the mounting rod 25 of the step frame 24 is rotatably mounted on the lower portion of the footrest frame 22 by the shaft 26, and the lower portion of the regulating arm 27 is mounted on the rear side of the mounting rod 25. Since the upper part of the regulating arm 27 is pivotally attached to the front side of the upper support frame 6, even if the footrest frame 22 rotates upward, the step frame 24 moves upward while remaining substantially horizontal, and the step frame 24 moves upward. Is supported by the regulating arm 27. In this case, a stay 53 is provided at the lower end of the footrest frame 22 at a predetermined angle so as to be located on the front side as it goes down, and the mounting rod 25 is attached to the stay 53 by the shaft 26. Is flush with the footrest frame 22, the mounting rod 25 comes into contact with the footrest frame 22, thereby stopping the step frame 24 from rotating downward around the shaft 26. Therefore, the step frame 24 rotates upward about the shaft 21 together with the footrest frame 22 in a flush state. The operation of the backrest frame 9, the seat frame 20, the footrest frame 22, and the step frame 24 has been described independently, but when these are rotated together, the seat frame 20 and the footrest that are substantially horizontal The bed mode is set to the above-mentioned bed mode by making the backrest frame 9 flush with the part frame 22 and the step frame 24. Further, the seat frame 20, the footrest frame 22 and the step frame 24 are moved upward, and the backrest When the frame 9 is rotated downward, the mode shifts to the extension mode in which the step frame 24 is higher and the backrest frame 9 is lower.

When the mode is shifted from the exhibition mode to the bed mode, the tilt rod 35 is contracted to reduce the step frame 24, the footrest frame 22, and the seat frame 20.
Rotate downward integrally about the shaft 21. That is, the tilt rod 35 is attached to the distal end of the intermediate arm 36, and the base of the intermediate arm 36 is fixed to the footrest frame 22 below the shaft 23. The intermediate arm 36 supports the load in which the footrest frame 22 is integrated, and the footrest frame 22 and the seat frame 20 rotate downward integrally until the bed mode is set. When the seat frame 20 comes into contact with the reinforcing rod 48, the seat frame 2
0 is prevented from rotating downward, so that only the footrest frame 22 rotates downward about the shaft 23. Next, when the footrest frame 22 is rotated downward to a predetermined position, the intermediate arm 36 is rotated.
When the tilt rod 35 is further reduced, the roller 45 is moved obliquely upward by the guide plate 46, and the front end of the seat frame 20 is rotated upward about the shaft 21. Then, when it moves up to a predetermined position, the regulating arm 27 comes into contact with the mounting rod 49 and stops operating, and the seating mode is set. Therefore, in the seating mode, the seat frame 20 is in the front-up state, so that the thigh of the seated person can be reliably supported, and the seating feeling is improved.

The armrest frame 60 is provided on one or both sides of the backrest frame 9, and the armrest frame 60 is attached to the attachment frame 57.
The mounting frame 57 is attached to the backrest frame 9 by the horizontal shaft member 56.
Side, the upper portion of the upper arm 63 is fixed to the horizontal shaft member 56, the lower arm 64 is mounted on the lower portion of the upper arm 63, and the base of the lower arm 64 is fixed to the horizontal shaft member 65,
The horizontal shaft member 65 is a horizontal shaft 1 at the center of rotation of the backrest frame 9.
0, and is rotatably attached to the rear bracket 8 on the rear side, so that the armrest frame 60 is horizontal regardless of the position of the backrest frame 9 from the sitting mode to the extension mode. Become. In this case, the upper arm 63
, The lower arm 64 and the rear bracket 8 constitute an armrest link. Since the lower arm 64 in a side view substantially overlaps with the backrest frame 9 in the seating mode, the whole structure is used. Make it small. In this state, the lower arm 64 substantially overlaps with the backrest frame 9 so that there is no gap when viewed from the side.
Foreign matter can be prevented from being inserted between the backrest frame 4 and the backrest frame 9. Further, the horizontal shaft member 56 and the horizontal shaft member 65 are protruded laterally by a predetermined length with respect to the backrest frame 9, and a gap is formed between the upper arm 63 and the lower arm 64 and the side surface of the backrest frame 9. When the backrest frame 9 is raised from the extension mode and the bed mode, the backrest frame 9 is not pinched even if foreign matter enters the space surrounded by the armrest link from the front and rear sides.

The armrest frame 60 is rotatably mounted on a mounting frame 57 via a bracket 58. The bracket 58 is provided with a stopper plate 62 abutting on the upper surface of the mounting frame 57. Then, the stopper plate 62 comes into contact with the mounting frame 57 to hold the armrest frame 60 in the upright state. The back skin member 7 surrounding the front (front side) of the back cushion material 70 of the backrest frame 9.
1 is a seat frame 2 from the lower part of the back cushion material 70.
The front end of the intermediate skin member 74 is engaged with the seat skin member 73 surrounding the seat cushion member 72 of the seat frame 20 through the gap between the seat back member 9 and the rear surface (back side) of the seat back frame 9. The rear end of the skin member 74 is the back skin member 71.
Is locked above the locking portion of the backrest frame 9 of
Foreign matter entering the gap between the backrest frame 9 and the seat frame 20 is prevented from falling downward by the intermediate skin member 74, and malfunction of the lifter mechanism 5, the reclining link, and the like is prevented. The front intermediate skin member 75 is engaged with the front end of the seat skin member 73, and the front end of the front intermediate skin member 75 is connected to the footrest skin member 76 of the footrest frame 22.
The lower surface (rear surface) of the intermediate portion of the front intermediate skin member 75 is provided with a one-side locking member 77 such as a planar fastener, and the one-side locking member 77 is provided on a needle punch 78 on the other side. Since the front intermediate skin member 75 is locked to the stop member 79, the front intermediate skin member 75 closes (surrounds) the gap between the seat frame 20 and the footrest frame 22, and the front intermediate skin member 75 when the bed mode is set. Floating can be prevented, and appearance is improved.

Since the step frame 24 is provided with the left and right supporting legs 80 projecting downward between the pair of mounting rods 25, the supporting legs 80 contact the floor surface in the sitting mode. Even if a person rides on the step frame 24, the load can be supported. In this case, the step frame 24 moves up and down in a substantially horizontal state. However, since the support leg portion 80 and the mounting rod 25 are located at a predetermined interval (center side) from the outer peripheral edge of the step frame 24 in plan view, the step frame 24 Even if the foot is inserted from the outer peripheral edge of the support 24, the support leg portion 80 and the mounting rod 25 are prevented from falling on the foot. Thus, another outer tubular member 82 is inserted around the outer periphery of the vertical tubular portion 87 of the table frame 86 to which the table 85 is attached, and the outer tubular member 82 is vertically mounted on one of the left and right sides of the seat frame 20. It is inserted into the penetrating cylindrical member 81 and fixed with screws so as not to rotate, and is mounted between the upper part of the vertical cylindrical part 87 and the outer cylindrical member 82 via a holding member 89 made of synthetic resin. A collar 90 made of synthetic resin is inserted through the lower end opening of 82, a bolt 91 is inserted through the collar 90, and the bolt 91 is screwed into a screw groove 92 provided on the inner periphery of the lower end of the vertical cylinder part 87. Therefore, when the table 85 is rotated about the vertical cylinder portion 87, the vertical cylinder portion 87 rotates against the frictional resistance between the vertical cylinder portion 87, the holding receiver 89 and the collar 90.

Therefore, when the table 85 is rotated to the desired position and released, the table 85 maintains that state. In this case, a flange portion 88 is provided at an arbitrary position in the upper and lower middle of the vertical cylinder portion 87, and a ring-shaped holding receiver 89 made of synthetic resin is provided between the flange portion 88 and the flange portion 84 of the outer cylindrical member 82. The flange 90a of the collar 90 made of synthetic resin is brought into contact with the lower end opening of the outer cylindrical member 82, and a bolt 91 is inserted through the collar 90. Since the bolt 91 is screwed into the screw groove 92 provided on the inner periphery, the distance between the flange portion 90a of the collar 90 and the holding receiver 89 is shortened. Part 8
8 and the frictional resistance between the holding portion 89 and the flange 90a of the collar 90 and the lower end of the outer tubular member 82 are increased. Therefore, the distance between the lower surface of the flange 88 of the longitudinal axis cylindrical portion 87 and the bolt 91 and the outer cylindrical member 82
Is proportional to the torque for rotating the vertical axis cylindrical portion 87, and when the bolt 91 is tightened, the operation load for moving the table 85 increases, and when the bolt 91 is loosened, the operation load for moving the table 85 decreases, Also, bolt 9
1 is screwed into the screw groove 92 of the vertical cylinder part 87, and the bolt 91 rotates integrally with the vertical cylinder part 87. Therefore, not only the initial setting is easy, but also the bolt 91 is repetitively moved by moving the table 85. It does not loosen and keeps the resistance torque as initially set.

That is, if the vertical cylinder portion 87 is inserted through the cylinder member 81 and is simply fixed to the cylinder member 81 with a screw, the contact portion between the vertical cylinder portion 87 and the screw is worn every time the table 85 is rotated. Then, the frictional resistance decreases, and in an extreme case, a large operation force is required to start the rotation of the table 85 at first, but once the table 85 is turned, it can be held at a predetermined position. In this regard, the operation load for the operation of rotating the vertical axis cylindrical portion 87 is determined by the tightening force of the bolt 91 sandwiched vertically, and the friction generated by this tightening becomes the frictional resistance. Not only is it possible to hold the table 85, but also at that position, regardless of the stop position of the table 85, with a predetermined force. The outer tubular member 82 and the tubular member 81 may be fixed by any means (configuration) so that they cannot be rotated by screws or the like, and the outer tubular member 82 does not rotate with respect to the tubular member 81. Such a problem of operation and change in resistance torque does not occur,
Therefore, the fixing configuration between the outer tubular member 82 and the tubular member 81 is not a requirement. In addition, "reclining", "tilt"
And the like are given to the constituent parts, and the description is made using words such as "seating mode". However, this is for ease of understanding, and is limited by these names and words. is not.

[0024]

According to the present invention, the upper supporting frame 6 is provided above the supporting lower frame 2 placed on the floor, and the backrest frame 9 and the seat frame 20 are rotatably mounted on the upper supporting frame 6, and In the multipurpose chair frame in which the base of the footrest frame 22 is rotatably provided on the front side of the frame 20 and the step frame 24 is provided at the tip of the footwear frame 22, in the left or right side of the seat frame 20, An armrest frame 60 is provided on both sides. The armrest frame 60 has an upper portion of the upper arm 63 fixed to a horizontal shaft member 56 provided on the backrest frame 9, and a lower arm 64 is attached to a lower portion of the upper arm 63. The base of the lower arm 64 is fixed to the horizontal shaft member 65, and the horizontal shaft member 65 is located below the horizontal shaft 10 at the center of rotation of the backrest frame 9,
The multipurpose chair is configured to be rotatably mounted on the upper support frame 6 on the rear side so that the lower arm 64 in a side view substantially overlaps with the backrest frame 9 when the backrest frame 9 is most erected. Since the armrest is used, the armrest frame 60 can be held substantially horizontally regardless of the inclined position of the backrest frame 9, and the backrest frame 9, the upper arm 63, and the lower arm 64
To minimize the space surrounded by, and prevent the foreign object from being pinched by inserting the foreign object from the side and rotating the backrest frame 9 while the foreign object is inserted. The present invention relates to the horizontal shaft member 5.
The armrest of the multipurpose chair, in which a gap is formed between the upper arm 63 and the lower arm 64 and the backrest frame 9 by projecting the back shaft 6 and the horizontal shaft member 65 to the side of the backrest frame 9 by a predetermined length. Therefore, even if the backrest frame 9 is rotated while unnecessary objects are contained in the space surrounded by the backrest frame 9, the upper arm 63, and the lower arm 64, the upper arm 63 and the lower arm Arm 64
Do not interfere with the rotation of

[Brief description of the drawings]

FIG. 1 is a side view in which a lift mechanism and others are omitted.

FIG. 2 is a perspective view of the same.

FIG. 3 is a plan view partially omitted.

FIG. 4 is a side view of the backrest frame.

FIG. 5 is a side view in which the backrest frame is rotated backward.

FIG. 6 is a side view of the backrest frame in a bed mode state.

FIG. 7 is a side view of the backrest frame in the exhibition mode state.

FIG. 8 is a perspective view of a seat frame and a footrest frame.

FIG. 9 is a perspective view of a seat frame and a footrest frame portion.

FIG. 10 is a side view of a sitting mode.

FIG. 11 is a side view of a transition state from the sitting mode to the bed mode.

FIG. 12 is a side view of the bed mode.

FIG. 13 is a side view of the exhibition mode.

FIG. 14 is a partial perspective view of an armrest frame.

FIG. 15 is a cross-sectional view of a mounting state of the skin member.

FIG. 16 is a cross-sectional view of a mounting state of a skin member of a seat frame and a footrest frame portion.

FIG. 17 is a perspective view of a step frame.

FIG. 18 is a plan view of the same.

FIG. 19 is a side view of the same.

FIG. 20 is a perspective view of a table frame.

FIG. 21 is a sectional view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Multipurpose chair frame main body, 2 ... Lower support frame, 3 ... Front leg part, 4 ... Roller, 5 ... Lifter mechanism, 6 ... Upper support frame, 7 ... Front and rear rod, 8 ... Rear bracket, 9
... backrest frame, 10 ... horizontal axis, 11 ... reclining motor, 12 ... axis, 13 ... reclining rod, 1
4 mounting rod, 15 shaft, 16 horizontal rod, 18 reclining link, 19 standing part, 20 seat frame, 2
DESCRIPTION OF SYMBOLS 1 ... shaft, 22 ... footrest frame, 23 ... shaft, 24 ... step frame, 25 ... mounting rod, 26 ... shaft, 27 ... regulating arm, 28 ... shaft, 29 ... long hole, 30 ... shaft, 31 ... mounting Member, 32 ... bracket, 33 ... tilt motor, 34 ...
Shaft, 35 ... Tilt rod, 36 ... Intermediate arm, 37 ...
Shaft, 38 ... horizontal rod, 39 ... link for seat, 40 ... rotation restricting stopper, 45 ... roller, 46 ... guide plate, 48 ... reinforcement rod, 49 ... mounting rod, 50 ... link for footrest part, 52 ... step Links for 53, stays, 56 horizontal member, 57
Mounting frame, 58: bracket, 60: armrest frame, 61: front stopper, 62: stopper plate, 6
3 upper arm, 64 lower arm, 65 horizontal member,
66: armrest link, 70: back cushion material, 71: back skin member, 72: seat cushion material, 7
3 ... Seat portion skin member, 74 ... Intermediate skin member, 75 ... Front intermediate skin member, 76 ... Leg portion skin member, 77 ... One side locking member, 78 ... Needle punch, 79 ... Other side locking member,
81: cylindrical member, 82: outer cylindrical member, 84: flange portion, 85:
Table, 86: Table frame, 87: Vertical axis cylinder, 88: Flange, 89: Clamping receiver, 90: Collar, 91
... bolt, 92 ... screw groove, 93 ... shaft part.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kaoru Inoue 2-14-5 Higashisuna, Koto-ku, Tokyo F-term (reference) in the development headquarters, Parama Unt Bet Co., Ltd. 3B095 EA02 EB04 3B099 AA03 BA10 BA13 CA36 CB01 CB06

Claims (2)

[Claims] An upper support frame is provided above a support lower frame mounted on a floor, and a backrest frame and a seat frame are rotatably mounted on the upper support frame. Frame 22 on the front side
Armrest frame 60 is provided on one or both sides of the left and right sides of the seat frame 20 in a multipurpose chair frame having a base portion rotatably provided and a step frame 24 provided at the tip of the footrest frame 22. The frame 60 has an upper arm 63 fixed to a horizontal shaft member 56 provided on the backrest frame 9, a lower arm 64 is pivotally mounted on a lower portion of the upper arm 63, and the lower arm 6
The base of 4 is fixed to a horizontal shaft member 65, and the horizontal shaft member 65 is rotatably attached to the lower upper support frame 6 side below the horizontal shaft 10 portion at the center of rotation of the backrest frame 9, and
An armrest of a multipurpose chair in which the lower arm 64 in a side view is arranged so as to substantially overlap with the backrest frame 9 when the backrest frame 9 is most erected. 2. The backrest frame 9 according to claim 1, wherein the horizontal shaft member 56 and the horizontal shaft member 65 project laterally from the backrest frame 9 by a predetermined length. An armrest for a multi-purpose chair with a gap between the armrest.