JP2002065386A - Chair to be converted into bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To meet various needs as a chair, a chair used for a dialysis therapy, an examination table, or a stretcher by only one chair. SOLUTION: A supporting shaft 10 is placed as a protrusion on a side of a back frame 9 found on a seatback 4, and an armrest 11 is installed on the supporting shaft 10 in a manner that the armrest 11 can rotate around the supporting shaft 10. The armrest 11 can be a blow-molded body made of polypropylene, and is supported by a receiving part 12 and the supporting shaft 10 through a basic shaft 13. The basic shaft 13 has a catching means 25 which retains the armrest 11 at least in a horizontal state and the width of the armrest 11 in a vertical state. A stopper 26 is placed like a protrusion on a basic part 20 which keeps the basic shaft 13, and the basic shaft 13 would not rotate more than 180 degrees as the basic shaft 13 makes a contact with a receiving part 12 at a position where the basic shaft 13 is rotated 180 degrees through the armrest 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair having a bed conversion function, which can be used as a one-day operation chair for various uses such as a chair, a dialysis chair, a consultation table and a stretcher. It is.

[0002]

2. Description of the Related Art Currently, among equipments provided in hospitals, in addition to a normal bed, there is a function capable of converting a chair, a backrest and a foot frame into a bed by displacing it. Since such a chair can be converted like a bed, it can be considered to be used as a surgical chair, a dialysis chair, and further as a consultation table or a stretcher.

[0003]

However, in order to convert the chair into a surgical chair, a dialysis chair, or a bed, and use it as a consultation table or a stretcher, it is necessary to use the chair. Armrests are not configured to move in response to changes in the backrest or foot frame and are not functional enough. Then, there was no other choice but to supplement the inadequate functions for each application. The present invention has been proposed in view of such a background, and an object of the present invention is to provide a chair having a bed conversion function, which is configured to be able to cope with the various uses described above.

[0004]

According to the present invention, in order to solve the above-mentioned problems, the present invention is characterized in that, in the first aspect, a backrest for supporting the upper body, a seat for supporting the buttocks, and a foot for supporting the lower body are provided. In a chair having a bed converting function in which a backrest and a foot can be adjusted up and down, an armrest is provided via a receiving member on a side portion close to a seat portion of the backrest, and the armrest is rotatable about a backrest width direction axis. At the same time, the backrest interlocking stay rotatably attached to the side of the seat is connected to the front end of the receiving member, so that the armrest is maintained in a substantially horizontal direction via the receiving member. Disclosed is a structure provided with restraining means for holding the width direction substantially in the horizontal direction and the vertical direction.
According to the present invention, in the second aspect, the armrest is supported via a base shaft on a support shaft projecting from a backrest side together with a receiving member, and the base shaft is coaxially mounted on the support shaft together with the support member. Joined through a base,
It has a first base shaft and a second base shaft connected to the first base shaft so as to be extendable and contractable, and the armrest is fixed to the second base shaft. The second base shaft is at least with respect to the first base shaft. Disclosed is a structure having a locking means for restraining the armrest in a substantially horizontal state and a longitudinal direction of the armrest width direction, and a biasing means for biasing the locking means in a locking direction. Further, in the present invention, in claim 3, the base shaft of the armrest is rotated about a support shaft protruding from a backrest side to provide an armrest on the backrest side, and a stopper for holding the armrest on the backrest side is provided on the base portion. The structure provided is disclosed.

According to the first aspect, when the backrest is raised and lowered, the backrest interlocking stay is displaced following the backrest, so that the armrest maintains a substantially constant direction regardless of the inclination angle of the backrest. In addition, when the backrest is depressed and the feet are lifted into a bed state, the armrests are restrained in a posture in which the width direction of the armrests is oriented vertically, thereby functioning as a fence.

According to the second aspect, when the holding state of the armrest is changed, the second main shaft fixed to the armrest is pulled away from the first main shaft against the urging force of the urging means. By releasing the locking state of the stopping means, turning the armrest around the base shaft and releasing the hand, the locking means can be actuated by the urging force of the urging means to restrain the armrest.

According to the third aspect of the present invention, the side surface of the seat is opened by bringing the armrest to the backrest side, and there is no hindrance to the user getting on and off.

[0008]

Next, one embodiment of a chair having a bed conversion function according to the present invention will be described.
This will be described below with reference to the accompanying drawings. FIG. 1 shows an example of a chair 1 having a bed conversion function. This chair 1
Has a backrest 4, a seat 5, and a foot 6, which are supported by legs 3 having a lifting function on a movable carriage 2. The cart 2 has casters 7 for freely moving the chair 1. A fixed leg 3a constituting the leg 3 is erected on the carriage 2, and a lifting leg 3b is provided so as to be able to move up and down with respect to the fixed leg 3a. A seat base 8 for holding the seat 5 is swingably attached to the lifting leg 3b. Also, a seat frame (not shown) constituting the seat portion 5
Further, a back frame 9 constituting the backrest 4 is connected so as to be able to undulate (see FIGS. 3 and 4). Further, a foot frame (not shown) forming the foot portion 6 is connected to a seat frame forming the seat portion 5. In this case, the foot frame is rotatably connected to the seat frame in a range in which the foot portion 6 is horizontal with respect to the seat portion 5 from a state of being suspended below the seat frame. The leg 3 has an elevating mechanism for elevating the elevating leg 3b, and an elevating mechanism (not shown) for adjusting the height of the backrest 4 and the foot 6 is provided in the space below the seat 5. Provided.

In the chair 1 as described above, a support shaft 10 protrudes from a side portion of the back frame 9 of the backrest 4, and the support shaft 10 is attached to the armrest 1 via a receiving member (described later).
1 is rotatably mounted around the support shaft 10 (see FIGS. 2 and 4). The armrest 11 is, for example, a blow-molded body made of polypropylene, and is supported on the support shaft 10 via the base shaft 13 together with the receiving member 12. As shown in FIG. 5, the receiving member 12 has a receiving groove 14 for receiving a base shaft 13 of the armrest 11, and has insertion holes 15, 15 at the base end side. Then, a stepped bolt 16 is inserted into the base shaft 13 of the armrest 11 through the insertion holes 15, 15 of the receiving member 12, and the stepped bolt 16 is
Is screwed into a screw hole 17 formed in the support shaft 10. A backrest interlocking stay 18 is rotatably attached to the distal end side of the receiving member 12 with a screw 19. The backrest interlocking stay 18 is rotatably attached to the side of the seat 5 so as to be parallel to the backrest 4 (see FIG. 7).

The base shaft 13 is connected to a base 20 coaxially mounted on the support shaft 10 by a stepped bolt 16 together with the receiving member 12. That is, the base shaft 13 has a first base shaft 13a fitted and connected to a receiving shaft 20a having an integral structure with the base 20, and a second base shaft 13b connected to the first base shaft 13a so as to be extendable and contractable. The armrest 11 is fixed to the base shaft 13b. In this case, the second base shaft 13b is inserted so as to be rotatable around the first base shaft 13a, and the tip of the first base shaft 13a protrudes from the second base shaft 13b so as to act a locking means described later. The bolt 22 is connected to the first through the compression spring member 21.
It is screwed into the screw hole 23 at the tip of the base shaft 13a. The compression spring member 21 is in a state of being sandwiched between the flange portion 24 at the tip of the second base shaft 13b and the bolt 22, and the spring force of the compression spring member 21 constantly holds the second base shaft 13b on the mounting side of the first base shaft 13a. It is pressed toward the shaft 20a. Further, the base shaft 13 has locking means 25 for restraining the armrest 11 at least in a horizontal state and in a vertical state in the width direction of the armrest 11. This locking means 25
Is a receiving shaft 20a of the base 20 holding the first base shaft 13a.
At the tip, a notch 25a formed in a cross shape and a second base shaft 1
And a locking projection 25b provided on the 3b side. The notch 25a and the locking projection 2 constituting the locking means 25
5b is locked by the spring force of the compression spring member 21. Further, a stopper 26 protrudes from the base 20 that holds the base shaft 13, and the armrest 11
When the base shaft 13 is turned through approximately 180 ° through the contact member, the base shaft 13 comes into contact with the receiving member 12 so as not to turn any more (see FIG. 6).

The chair 1 having a bed conversion function according to the present invention is configured as described above. Next, the operation of the chair 1 will be described. First, when the backrest 4 is raised and the foot 6 is in a hanging state (see FIG. 1), the user sits down on the seat 5, and the armrest 11 measures, for example, blood pressure or performs treatment on the upper arm. In such a case, the user is to be kept horizontal so that the upper arm of the user can be put on. Here, by operating the raising / lowering mechanism of the backrest 4, the inclination angle of the backrest 4 can be adjusted to a desired angle (see FIGS. 7 and 8). In this case, the receiving member 12
The backrest interlocking stay 18 that supports is tilted in conjunction with the backrest 4, so that the armrest 11 can always be maintained in a substantially horizontal state regardless of the inclination angle of the backrest 4.

Next, when the chair 1 is changed from the chair state to the bed state by operating the up-and-down mechanism of the backrest 4 and the foot 6 (see FIG. 3), the armrest 11 is operated so that the width direction thereof is vertical. . That is, as shown in FIG.
The compression spring member 2 is moved in a direction in which the armrest 11 is separated from the support shaft 10 on the side of the back frame 9 of the backrest 4 in the axial direction of the base shaft 13.
1 to be pulled against the spring force. As a result, the notch 25a formed in the receiving shaft 20a of the base 20 of the locking means 25 allows the locking protrusion 25b on the second base shaft 13b side to be formed.
Can be removed, and the armrest 11 can be turned so that the width direction of the armrest 11 is the vertical direction. If the user releases his hand when the width direction of the armrest 11 is set to the vertical direction, the locking projection 25b is again formed by the spring force of the compression spring member 21 at the notch 25a of the locking means 25 formed in the vertical direction. The armrest 11 can be restrained by locking. Then, the chair 1 is changed from the chair state to the bed state by operating the back and forth mechanism of the backrest 4 and the foot 6, and the armrest 11 is moved to the seat 5.
On the side, it functions as a fence, allowing the user to lie down in a safe state. Therefore, it is possible to move to another place while the user is being carried (see FIG. 3). Then, if necessary, the armrest 11 is further lifted to bring it to the side of the backrest 4 and the seat 5
The side surface can be opened (see FIGS. 2 and 6). When the armrest 11 is lifted and the base shaft 13 is turned by approximately 180 °, the stopper 26 of the base 20 that holds the base shaft 13
Abuts against the receiving member 12 and can be held in this state. In this way, the user can be easily transferred to a normal bed, a wheelchair, or the like.

[0013]

As described above, according to the present invention, when used as a chair or as a bed, the armrest can be used as the armrest itself, or as a medical examination or a treatment table. Furthermore, it can function as a fence at the time of bed conversion, and the usability can be improved.

[0014]

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an embodiment of a chair having a bed conversion function according to the present invention.

FIG. 2 is an explanatory view showing a function of an armrest of a chair in FIG. 1;

FIG. 3 is an external perspective view when the chair shown in FIG. 1 is converted into a bed.

FIG. 4 is a partially sectional explanatory view of an armrest.

FIG. 5 is an exploded perspective view of a mechanism for supporting an armrest.

FIG. 6 is an explanatory view showing another function of the armrest.

FIG. 7 is an explanatory side view showing an operation relationship between the armrest and the backrest.

FIG. 8 is an explanatory side view showing an operation relationship between the armrest and the backrest.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chair 2 Dolly 3 Leg 3a Fixed leg 3b Elevating leg 4 Backrest 5 Seat 6 Leg 7 Caster 8 Seat base 9 Back frame 10 Support shaft 11 Armrest 12 Receiving member 13 Base shaft 13a First base shaft 13b Second base shaft 14 Receiving groove 15 Inserting hole 16 Stepped bolt 17 Screw hole 18 Backrest interlocking stay 19 Screw 20 Base 20a Receiving shaft 21 Compression spring 22 Bolt 23 Screw hole 24 Flange 25 Locking means 25a Cut 25b Locking protrusion 26 Stopper

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61G 13/02 A47C 1/04 15/04 A61G 13/00 D // A47C 1/04 15/00 E

Claims (3)

[Claims] 1. A chair having a bed converting function, comprising a backrest for supporting an upper body, a seat for supporting a buttocks, and a foot for supporting a lower body, wherein the backrest and the feet are configured to be able to adjust up and down. The armrest is rotatably mounted on the side portion close to the seat portion via a receiving member so as to be rotatable around the axis in the width direction of the backrest, and is rotatably mounted on the seat side portion near the front end of the receiving member. A backrest interlocking stay is connected to maintain the armrest in a substantially horizontal direction via the receiving member, and the armrest includes a restraining means for holding a width direction in a substantially horizontal direction and a vertical direction. A chair having a bed conversion function. 2. The armrest, together with a receiving member, is supported by a support shaft protruding from the backrest side via a base shaft, and the base shaft is coaxially mounted on the support shaft together with the support member. A second base shaft connected to the first base shaft so as to be extendable and contractable, and the armrest is fixed to the second base shaft;
A locking means for restraining the base shaft with respect to the first base shaft at least in a state where the armrest is substantially horizontal and the armrest width direction is vertical, and a biasing means for biasing the locking means in a locking direction. The chair having a bed conversion function according to claim 1, wherein the chair has a bed conversion function. 3. The base of the armrest is rotated about a support shaft protruding from a backrest side to provide an armrest on the backrest side, and a stopper is provided on the base for holding the armrest on the backrest side. The chair having a bed conversion function according to claim 2, wherein