JP2000175974A - Multi-functional bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-functional bed capable of automatically execute mutual conformation change of a bed conformation and a wheelchair conformation by extremely simple operation by reducing a size by simple structure. SOLUTION: In a multi-functional bed FB formed of two of a fixed U-shaped bed 1 with a U-shaped notch part 6 and a movable auxiliary bed 2 attachably and detachably fitted to the U-shaped notch part of the bed 1, the movable auxiliary bed is provided with a driving source M1, which freely changes a conformation to the bed conformation in a horizontal posture and the wheelchair posture with a bag rest part 19, a seat part 20 and a foot rest part 21. Then, in the process of changing a person lying on a bed into the wheel chair conformation, in order to avoid the person lying on the bed conformation being pushed out forward, the part 20 is temporarily tilted corresponding to tilting of the part 19 so as to set a side closer to the part 21 to be an upper side to change the conformation so that the buttocks part of the person lying on the bed may be sunk compared with that at the time of the bed conformation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-functional bed for nursing care and the like, and more particularly to a multi-functional bed which can be automatically changed from a bed form to a wheelchair form. The present invention relates to a multi-functional bed that can be changed in posture from a horizontal posture to a wheelchair sitting posture and moved.

[0002]

2. Description of the Related Art In hospitals and the like, various types of nursing beds have been developed and provided for patients who need nursing care. These nursing beds are beds for keeping patients lying horizontally, and in some cases, the beds themselves are configured to bend into a reclining seat form.

In the conventional nursing care bed, if a patient is to be moved to another place, it is necessary to prepare a wheelchair separately, and further, a lifter for putting the patient on and off the wheelchair. It was necessary to prepare equipment and the like.

On the other hand, research and development of multifunctional nursing care beds having both a bed function and a wheelchair function have been actively pursued. However, these multifunctional nursing care beds have a problem that the structure is complicated and large, and the apparatus itself becomes expensive.

Further, the conventional multifunctional nursing care bed which has been developed and developed requires complicated control means for changing the form from a horizontal bed to a wheelchair and from the wheelchair to a horizontal bed. However, they have a problem that the operation is complicated.

Furthermore, the multifunctional nursing care bed, which has been conventionally developed and studied, has many problems in terms of operational safety with respect to the change in form from the horizontal bed form to the wheelchair form and from the wheelchair form to the horizontal bed form. It had the following.

[0007]

SUMMARY OF THE INVENTION Therefore, the present invention
An object of the present invention is to solve some problems seen in the conventional multi-function nursing bed described above, and to reduce the size and the price in a necessary range with a simple structure, and to form a bed and a wheelchair. Another object of the present invention is to provide a safe and stable multi-functional bed that can automatically change the configuration of the multi-functional bed with an extremely simple operation.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention specifically has a fixed U-shaped bed having a U-shaped notch, and a detachable U-shaped notch of the fixed U-shaped bed. In a multifunctional bed composed of two movable auxiliary beds that fit freely, the movable auxiliary bed includes:
A multi-functional bed comprising a drive source, the form of which can be freely changed by the drive source into a bed configuration in a horizontal posture and a wheelchair configuration having a backrest, a seating portion, and a leg rest portion. .

Further, in the present invention, the movable auxiliary bed includes a lower wheel, a traveling drive motor, and a steering operation device, and is configured to be able to travel by itself.

Further, in the present invention, the movable auxiliary bed is configured to be able to run on the lower wheels and to be able to adjust the height of the chair.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a multifunctional bed according to the present invention will be described in detail based on specific embodiments shown in the drawings. FIG. 1 schematically shows an example of a specific embodiment of a multifunctional bed according to the present invention,
FIG. 1A is a schematic perspective view showing a state in which the multifunctional bed, which is a combination of a fixed U-shaped bed and a movable auxiliary bed, is in the form of a horizontal bed, and FIG. FIG. 1C is a schematic perspective view showing a state in which a movable auxiliary bed has been changed to a wheelchair form via a reclining seat form by cutting a part of a fixed U-shaped bed. FIG. 1C is a movable state changed to a wheelchair form. It is a schematic perspective view showing the state where an auxiliary bed was separated from a fixed U-shaped bed. On the other hand, FIG. 2 is a schematic side view of the multifunctional bed according to the present invention, showing a detailed structure of the movable auxiliary bed in a wheelchair form.

Further, FIGS. 3, 4 and 5 are views for explaining a process of changing the movable auxiliary bed from a horizontal bed to a wheelchair through a reclining seat, and FIG. FIG. 4 is a schematic side view illustrating a state in which the auxiliary bed is maintained in a horizontal bed form, and FIG. 4 is a schematic side view illustrating a state in which the movable auxiliary bed is maintained in a reclining seat form. FIG. 5 is a schematic side view showing a state where the movable auxiliary bed is maintained in a wheelchair configuration.

FIG. 6 shows a preferred embodiment of the power source and the power transmission unit in a specific embodiment of the multifunctional bed according to the present invention, and shows a rotary bed mounted on the movable auxiliary bed side. FIG. 11 is a schematic side view showing a configuration example in which a power transmission unit including a self-locking unit mounted on the movable auxiliary bed side is directly connected to the drive source.

FIG. 7 shows a multifunctional bed according to another embodiment of the present invention, in which the self-locking means is a combination of a cylindrical cam and a one-way clutch. FIG. 4 is a schematic side view corresponding to FIG. 3 shown.

FIG. 8 shows a specific example of the multifunctional bed according to the present invention to which still another configuration is added. The excrement is placed on the multifunctional bed while lying on the bed. It is a schematic perspective view which shows the specific example comprised so that excretion processing could be performed.

First, the basic structure of the multifunctional bed FB according to the present invention will be described in detail with reference to FIGS. As shown in each figure of FIG.
Is constituted by a combination of two components of a fixed U-shaped bed 1 and a movable auxiliary bed 2.

The fixed U-shaped bed 1 has a bed surface structure 3. The bed surface structure 3 includes a bed frame 4 and a mat 5 mounted on the bed frame 4. The bed surface structure 3 has a U-shaped notch 6. On the other hand, the movable auxiliary bed 2 has a bed surface structure 7. The bed surface structure 7 is constituted by a bed frame 8 and a mat 9 mounted on the bed frame 8, and the contour 10 of the bed surface structure 7 is
The bed 1 is formed into a shape that fits snugly into the U-shaped notch 6.

On the other hand, on the lower surface of the bed frame 4 of the bed surface structure 3 of the fixed U-shaped bed 1, a plurality of fixed U-shaped beds 1 for adjusting the height of the bed at a desired installation location are provided. And the body part 12 are combined. A body frame 13 as a wheelchair, which will be described later, is attached to the lower surface of the bed frame 8 of the bed surface structure 5 of the movable auxiliary bed 2, and a pair of caster type wheels for changing the traveling direction is attached to the body frame 13. A front wheel 14 and a pair of rear wheels 16 including an axle 15 are mounted.

The movable auxiliary bed 2 is equipped with a power source B, a drive source M1 for changing the form of a wheelchair, a drive source M2 for changing the height of a wheelchair, and a drive source M3 for driving a wheelchair. In one example, the wheelchair height changing drive source M2 includes a drive source M2-A incorporated on the front wheel side and a drive source M2-B incorporated on the rear wheel side. Is a drive source M3-A incorporated on the right wheel side,
And a drive source M3-B incorporated on the left wheel side.

The wheelchair form changing drive source M1 is a drive source for changing the movable auxiliary bed 2 into a horizontal bed form, a reclining seat form and a wheelchair form, and the wheelchair height changing drive source M2. Is a drive source for changing the height of the vehicle body of the movable auxiliary bed 2, and the wheelchair drive source M3 is a drive source for freely driving the movable auxiliary bed 2 as a wheelchair.

According to the present invention, a steering operation device 35 for driving and controlling the wheelchair form changing drive source M1, the wheelchair height changing drive source M2, and the wheelchair traveling drive source M3 provided for the movable auxiliary bed 2. Is provided.

In the embodiment shown in FIGS. 1 and 2, the steering operation device 35 as an example includes a first operation switch 35A detachably attached to an armrest member 82 of the movable auxiliary bed 2 and a second operation switch 35A. And an operation switch 35B.

In one example, the first operation switch 3
5A is for changing the form and height of the movable auxiliary bed 2
4 operating positions P for changing₁ , P
_Two , P _Three , P_Four Having a first operation position
Option P₁ When the operation handle 36 is operated to the side,
Change the form of the auxiliary bed 2 from a horizontal bed to a wheelchair
The second operating position P_Two Operate to the side
When the handle 36 is operated, the movable auxiliary bed 2 is moved to a wheelchair.
It can be changed from child form to horizontal bed form
You. Further, the third operation position P_Three Operation hand on the side
When the operator operates the handle 36, the vehicle height of the movable auxiliary bed 2 is raised.
The fourth operating position P_Four Control to the side
When the operation handle 36 is operated, the vehicle of the movable auxiliary bed 2
You can lower your body height.

On the other hand, the second operation switch 35B is
It is for traveling of the movable auxiliary bed 2 and has four operation positions P ₁ , P ₂ , P ₃ and P _4, and an operation handle 36 is provided on the first operation position P ₁ side. When operated, it is possible to advance the operation of the movable auxiliary bed 2, by operating the operation handle 36 to the second operating position P ₂ side, the movable auxiliary bed 2 can be retracted operation. Further, the movable auxiliary bed 2 and operates the operation handle 36 in the third operating position P ₃ side can divert to the left, by operating the operation handle 36 to the fourth operating position P ₄ side of the movable The route of the auxiliary bed 2 can be changed rightward.

Fixed U-shaped bed 1 provided with the legs 11
And the movable auxiliary bed 2 provided with a pair of front wheels 14 and a pair of rear wheels 16 over the body frame 13, the upper surface side of the mat 5 of the bed surface structure 3 in the fixed U-shaped bed 1, and the movable auxiliary bed 2 1A is designed to be flush with the upper surface side of the mat 9 of the bed surface structure 7 when combined in a horizontal bed form as shown in FIG. 1A, and to form a relatively wide bed surface.

A guard member 17, a suitable fence member 18 functioning as a handrail, and the like are mounted around the upper surface side 3a of the bed surface structure 3 in the fixed U-shaped bed 1. Further, on the upper surface side 3a of the bed surface structure 3 of the fixed U-shaped bed 1, in order to prevent pinching, the mating surface along the U-shaped cutout 6 of the fixed U-shaped bed 1 is provided in terms of safety. The plate-shaped safety switches SF1 and SF2 are provided.

In the present invention, the movable auxiliary bed 2
Is a part of the horizontal bed in the horizontal bed form, as a reclining seat in the reclining seat form, further, can be changed to three forms as a wheelchair in a wheelchair form, as a bed, reclining seat and wheelchair Designed to work.

The movable auxiliary bed 2 is designed as follows in order to function as the above-mentioned three forms. First, the movable auxiliary bed 2 has its bed surface structure 7 divided into a backrest 19 as a wheelchair, a seating part 20, and a leg rest part 21, which are bent by articulated connecting means 22, 23, respectively. They are freely connected.

In the embodiment shown in FIG. 1, the leg rest 21 of the movable auxiliary bed 2 further includes
A and a footrest 21B that is flexibly connected to the hanging part 21A via an articulated connecting means 24.

In the present invention, the movable auxiliary bed 2
Comprises a body frame 13 and a link mechanism 25. The bed surface structure 7 including the backrest portion 19, the seating portion 20, and the leg rest portion 21 is attached to the body frame 13 by the link mechanism 25. Are linked to each other individually.

The body frame 13 of the movable auxiliary bed 2 includes a front wheel supporting frame portion 26 for supporting the pair of front wheels 14, an intermediate frame portion 27 fixed to the front wheel supporting frame portion 26, and an intermediate frame portion. A rear wheel support frame portion 28 extending toward the rear wheel from the rear wheel 27 and supporting the axle 15 of the pair of rear wheels 16.
And that which includes.

The body frame 13 of the movable auxiliary bed 2
The upper end 26a of the front wheel support frame portion 26 is located on the lower surface side of the bed frame 8 in the bed surface structure 7 when the bed surface structure 7 of the movable auxiliary bed 2 is changed to a horizontal bed form. The abutment stably supports the horizontal bed configuration of the bed surface structure 7.

At the lower end 26b of the front wheel support frame portion 26 of the body frame 13, the movement of the foot rest 21B of the leg rest 21 of the bed surface structure 7 of the movable auxiliary bed 2 is restricted. A footrest retaining frame portion 29 for bending the portion 21B around the articulated connecting means 24 is provided.

Further, a first bracket member 3 for connecting the body frame 13 and the bed surface structure 7 via a link mechanism 25 is provided on the body frame 13.
The zero and second bracket members 31 are fixedly attached.

On the other hand, in the present invention, the fixed U-shaped bed 1 and the movable auxiliary bed 2
Is pressed into the U-shaped notch 6 of the fixed U-shaped bed 1 to be fitted thereto, and the movable auxiliary bed 2 is fixed at a fixed position in the fixed U-shaped bed 1 by a brake means on the movable auxiliary bed 2 side. You can do it.

Next, the wheelchair form changing drive means 33 mounted on the movable auxiliary bed 2 will be described in detail. The wheelchair form changing drive unit 33 includes a wheelchair form change drive source M1 composed of a rotary drive motor. On the other hand, the first bracket member 3 attached to the body frame 13 on the movable auxiliary bed 2 side
In connection with 0, a self-locking means 40 described later is incorporated. The self-locking means 40 is for automatically maintaining the form in a stable state when the driving source is stopped after the movable auxiliary bed 2 has changed its posture between the bed form and the wheelchair form.

For example, in the specific embodiment shown in FIG. 2, in a case where a driving source M1 for changing the form of a wheelchair is mounted on the side of the movable auxiliary bed 2, the self-locking means 40 is mounted on the wheelchair. Rotation axis 34 of form change drive source M1
The worm gear mechanism 41, which is a combination of the worm 42 directly attached to the worm wheel 43 and the worm wheel 43 attached to the pivot 32 of the first bracket member 30, functions as an extremely effective self-locking mechanism.

When the drive source M1 is a rotary drive motor as in the specific embodiment shown in FIG. 7, the self-locking means 40 includes a one-way clutch mechanism 45 attached to the rotary shaft 34 and a cylindrical cam. The power transmission mechanism may be a combination with the mechanism 46. The one-way clutch mechanism 45 includes a ratchet wheel 47 and a pawl 48 designed to allow rotation in one direction and prevent rotation in the other direction. On the other hand, the cylindrical cam mechanism 46 includes a cylinder 50 having a groove 49 on the outer peripheral surface, and a groove 49 of the cylinder 50.
And a slider member 51 that reciprocates in the axial direction of the cylinder 50.

Further, when the driving source is a rotary drive motor, the self-locking means 40 may be a power transmission mechanism including a ratchet mechanism, or a self-locking power transmission mechanism. There may be. Further, when the drive source is a hydraulic drive system, the self-locking means 40 can be constituted by a unit including a check valve mechanism in the hydraulic drive system.

Next, the multifunctional bed FB according to the present invention
A mechanism for changing the movable auxiliary bed 2 into the horizontal bed form, the reclining seat form, and the wheelchair form will be described.

An important point of the present invention is that when the movable auxiliary bed 2 is changed from a horizontal bed form to a wheelchair form through a reclining seat form, the posture of a person lying on the bed is gradually seated in accordance with the form change. In this case, in the process of changing a person lying on the bed into a wheelchair form, in order to prevent the person lying on the bed from being pushed forward, the seating portion is temporarily placed on the leg rest. It is designed to be tilted according to the inclination of the backrest so that the side closer to the top is up, so that the buttocks of the person lying on the bed can change the form so that it sinks in the horizontal bed form is there.

In the present invention, based on the above concept,
A link mechanism 25 for individually and interlockingly connecting the backrest 19, the seating part 20, the leg rest 21 and the body frame 13 in the movable auxiliary bed 2 is provided. By passing through the link mechanism 25, the form-change drive source M1
The horizontal bed portion of the movable auxiliary bed 2 can be transformed into a backrest portion, a seating portion, and a leg rest portion as a wheelchair.

The link mechanism 25 is basically provided with a rotating support shaft 32 with respect to a first blanket 30 attached to the vehicle body frame 13, and a link mechanism 25 attached to the vehicle body frame 13. 2 blanket 31
A pivot shaft 52 is disposed on the vehicle body frame 13 via a third blanket 53 attached to the lower surface of the seating portion 20 of the movable auxiliary bed 2 with respect to the pivot shaft 52. The seat 20 is swingably connected.

The link mechanism 25 is connected to the rotating pivot shaft 3.
2 and a bell crank 55 attached to the rotating pivot 52. The rotation member 54 has a first pivot point 56 and a second pivot point 57 at positions separated from the rotation pivot shaft 32, respectively. And a second pivot piece 59. The first pivot piece 58 has a third pivot point 60 and a fourth pivot point at positions away from the rotation pivot shaft 52, respectively. 61, and the second rotating piece 5
In FIG. 9, a fifth pivot point 62 is provided at a position away from the rotation pivot shaft 52.

The first link bar 64 connects the first pivot bar 56 between the first pivot 56 of the pivot member 54 of the link mechanism 25 and the pivot 63 of the backrest 19 of the movable auxiliary bed 2. Second pivot point 57 of member 54
A second link bar 65 provides a fourth pivot between the first pivot piece 58 of the bell crank 55 and the third pivot 60 on the first pivot piece 58 of the bell crank 55. A third link bar 67 is provided between the fulcrum 61 and the pivot 66 of the leg rest 21 of the movable auxiliary bed 2.
Are pivotally connected to each other.

On the other hand, an intermediate pivot point 70 is provided between a pivot point 68 provided on the body frame 13 and a pivot point 69 provided on the lower surface of the seat portion 20 of the movable auxiliary bed 2.
Are connected by first and second link pieces 71 and 72 which are pivotally connected at the bell crank 5.
The fifth pivot point 62 of the fifth second rotating piece 59 and the intermediate pivot point 70 of the first and second link pieces 71, 72.
Are pivotally connected by a third link piece 73.

Further, in the present invention, the link mechanism 25 functions to extend and retract an auxiliary wheel 74 for preventing the movable auxiliary bed 2 from falling forward. That is,
A sixth pivot point 75 is provided on the first rotating piece 58 of the bell crank 55 in the link mechanism 25. Footrest stopping frame portion 29 in the body frame 13
, An auxiliary wheel operating link member 77 is swingably attached via a pivot point 76. The auxiliary wheel operating link member 77 is provided with a pivot point 78, and the pivot point 78 and a sixth pivot point 7 in the bell crank 55 are provided.
5 is pivotally connected by a connection link 79.

The upper end 77 of the auxiliary wheel operating link member 77
An auxiliary roller 80 is attached to a, so that the movable auxiliary bed 2 supports the lower surface of the leg rest 21 in the horizontal bed configuration shown in FIG. 3 and the reclining seat configuration shown in FIG. And an auxiliary wheel 7 provided on the lower end side of the auxiliary wheel operating link member 77.
The grounding of 4 prevents the movable auxiliary bed 2 from falling forward.

According to the link mechanism 25 described above, the movable auxiliary bed 2 is changed from the horizontal bed form shown in FIG.
When the form is changed to the wheelchair form shown in FIG. 5 through the reclining seat form shown in FIG.
, The rotation member 54 rotates counterclockwise around the rotation pivot shaft 32 via the self-locking mechanism 40. At this time, the backrest 19 of the movable auxiliary bed 2 is pushed toward the upright direction around the articulated connecting means 22 via the first link bar 64.

By the rotation of the rotating member 54 in the counterclockwise direction, the bell crank 55 is disengaged from the second link bar 6.
5 to rotate counterclockwise around the pivot 52. In this case, the seating portion 20 of the movable auxiliary bed 2 is connected to the third link piece 7 connected to the output side of the second rotating piece 59 of the bell crank 55.
3 and the first and second link pieces 71 and 72 connecting between the body frame 13 and the seating portion 20, and the seating portion 20 rotates clockwise around the rotation pivot shaft 52. Then, the backrest portion connecting side of the seating portion 20 is lowered, and the legrest portion connecting side of the seating portion 20 is raised.

On the other hand, at this stage, the leg rest 21 of the movable auxiliary bed 2 is
Is pulled in via the third link bar 67 connected to the first rotating piece 58 of the first rotary piece 58 and moves counterclockwise around the articulated connecting portion 23.

Further, when the driving source M1 is operated to change the form from the reclining seat form shown in FIG. 4 to the wheelchair form shown in FIG. 5, the backrest portion 19 and the leg rest portion 21 of the movable auxiliary bed 2 are moved forward. Each shifts in the counterclockwise direction in the same manner as described above. However, at this stage, the seat portion 20 of the movable auxiliary bed 2 is connected to the third link piece 73 connected to the output side of the second rotating piece 59 of the bell crank 55.
And a first connecting the body frame 13 and the seating portion 20 to each other.
By the action of the second link pieces 71 and 72, the seating portion 20 is shifted in the direction opposite to the shifting direction described above, and
Is again shifted to a substantially horizontal state.

The form change from the wheelchair form to the horizontal bed form shown in FIG. 5 is performed by a procedure reverse to the procedure described above, and the movable auxiliary bed 2 is fixed to the fixed U.
In the process of fitting into the shaped bed 1 and restoring to the original horizontal posture, the posture of the user sitting on the wheelchair automatically returns to the lying posture. 2 and 5,
Reference numeral 81 is an operation handle provided with a brake means, and reference numeral 82 is an armrest member. The armrest member 82 is housed behind the backrest 19 of the wheelchair, and is configured to extend from the back to the front and lock at an appropriate angular position in a wheelchair configuration.

FIG. 8 shows a specific example of the multifunctional bed according to the present invention to which still another configuration is added. The excrement is placed on the multifunctional bed while lying on the bed. It is configured to be capable of excretion processing. In the multifunctional bed according to this example, an excretion hole 93 for excreting excrement is provided at a seating portion of the movable auxiliary bed, and a lower body portion facing the excretion hole 93 is provided with a flushing function. A toilet device 94 is provided. The excretion hole 93 is formed to be openable and closable by an appropriate opening and closing means.

[0055]

According to the multifunctional bed of the present invention having the above-mentioned structure, the multifunctional bed is constituted by the two elements of the fixed U-shaped bed and the movable auxiliary bed, and has a simple structure and a small size within the required range. It is possible to operate the bed form, reclining seat form, and wheelchair form automatically and very easily, and with high reliability and safety, and it is extremely effective in that respect. It can be said that it acts on

Further, the multifunctional bed according to the present invention is:
A person lying on the bed simply presses the button switch,
In that the movable auxiliary bed can be changed from a horizontal bed form to a wheelchair form via a reclining seat form, and labor saving can be achieved, it can be said that it works very effectively as a nursing bed for those who need nursing care.

Further, the multifunctional bed according to the present invention is:
By adopting a specially designed link mechanism, in the process of changing the person lying on the bed to a wheelchair form, once the person lying on the bed is not pushed forward, the seating part is once close to the leg rest part It can be said that this works extremely effectively in terms of safety, because the upper part is inclined so that the hips of a person lying on the bed sink below the horizontal bed.

Further, the multifunctional bed according to the present invention is:
By providing self-locking means in connection with the power transmission unit, after changing the form from horizontal bed form to wheelchair form,
By stopping the driving source, the configuration can be automatically maintained in a stable state, and in that respect, it can be said that the labor is saved and the operation is extremely effective.

Further, in the multifunctional bed according to the present invention, since the driving source is provided on the movable auxiliary bed,
Easily change the shape of the bed away from the bed, take a reclining position, adjust the height of the chair, and allow elderly people and patients using this type of bed to lie and move without relying on their caregivers In this respect, it can be said that this works extremely effectively.

[Brief description of the drawings]

FIG. 1 schematically shows a specific embodiment of a multifunctional bed according to the present invention.
FIG. 1B is a schematic perspective view showing a state in which the multifunctional bed composed of a combination of a fixed U-shaped bed and a movable auxiliary bed is in the form of a horizontal bed, and FIG. FIG. 1C is a schematic perspective view showing a state in which the bed has been changed to a wheelchair form through a reclining seat form by cutting a part of a fixed U-shaped bed.
FIG. 4 is a schematic perspective view showing a state in which a movable auxiliary bed changed into a wheelchair form is separated from a fixed U-shaped bed.

FIG. 2 is a schematic side view of the multifunctional bed according to the present invention, showing a detailed structure of the movable auxiliary bed in a wheelchair form.

FIG. 3 is a schematic diagram showing a state in which the movable auxiliary bed is maintained in a horizontal bed form during a process of changing the movable auxiliary bed from a horizontal bed form to a wheelchair form through a reclining seat form. FIG.

FIG. 4 is a schematic diagram showing a state in which the movable auxiliary bed is maintained in a reclining seat configuration in a process of changing the movable auxiliary bed from a horizontal bed configuration to a wheelchair configuration through a reclining seat configuration. FIG.

FIG. 5 is a schematic diagram illustrating a state in which the movable auxiliary bed is maintained in a wheelchair configuration in a process of changing the movable auxiliary bed from a horizontal bed configuration to a wheelchair configuration through a reclining seat configuration. It is a side view.

FIG. 6 shows a preferred embodiment of a power source and a power transmission unit in a specific embodiment of the multifunctional bed according to the present invention, which is mounted on the movable auxiliary bed side. FIG. 10 is a schematic side view showing a configuration example in which a power transmission unit including a self-locking unit mounted on the movable auxiliary bed is directly connected to the rotary drive source.

FIG. 7 shows a multifunctional bed according to the present invention, showing a different embodiment of the self-locking means, wherein the self-locking means is a combination of a cylindrical cam and a one-way clutch. Figure 3 showing
It is a schematic side view corresponding to FIG.

FIG. 8 shows a specific example of the multifunctional bed according to the present invention to which still another configuration is added. The excrement is laid on the multifunctional bed while lying on the bed. It is a schematic perspective view which shows the specific example comprised so that excretion processing could be performed.

[Explanation of symbols]

 FB Multifunctional bed 1 Fixed U-shaped bed 2 Movable auxiliary bed 3 Bed surface structure of fixed U-shaped bed 6 U-shaped notch 7 Bed surface structure of movable auxiliary bed 11 Multiple legs 12 Body of fixed U-shaped bed Part 13 Body frame 14 A pair of caster-type front wheels 15 Rear wheel axle 16 A pair of rear wheels 19 A backrest part as a wheelchair 20 A seating part as a wheelchair 21 A leg rest part as a wheelchair 22, 23, 24 Articulated connecting means 25 Link mechanism 26 Front wheel support frame portion 27 Intermediate frame portion 28 Rear wheel support frame portion 29 Foot rest stop frame portion 30 First bracket member 31 Second bracket member 32 Rotating pivot shaft 33 Wheelchair form changing drive means 34 Rotation Drive shaft 35 Steering operation device B Power supply M1 Wheelchair form change drive source M2 Car Kodaka of altering drive source M3 wheelchair traveling drive source 36 operating handle 40 self-locking means 41 worm gear mechanism 42 worm 43 worm wheel 45 Wan'ue clutch mechanism 46 cylindrical cam mechanism 52 rotates the pivot shaft 54 pivot member 55 the bell crank

Claims (3)

[Claims] 1. A multifunctional bed comprising a fixed U-shaped bed having a U-shaped notch and a movable auxiliary bed removably fitted into the U-shaped notch of the fixed U-shaped bed. The movable auxiliary bed is provided with a drive source, and the drive source can be freely changed into a bed form in a horizontal posture and a wheelchair form having a backrest portion, a seating portion, and a leg rest portion. Multifunctional bed. 2. The multifunctional bed according to claim 1, wherein the movable auxiliary bed includes lower wheels, a traveling drive motor, and a steering operation device, and is capable of traveling by itself. 3. The multifunctional bed according to claim 1, wherein the movable auxiliary bed is configured to be able to run on lower wheels and to be adjustable in height of a chair.