JP2000135257A - Multi-function bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate attaching/detaching a wheelchair to/from a fixed bed main body in a multi-function bed capable of seating a user such as an aged person or patient or laying down without requiring special nursing. SOLUTION: In this multi-function bed composed of a U-shaped fixed bed main body 200, and a wheelchair engaged with a cut part in the bed main body 200 to compose part of a bed surface in such a way that its inclination angle is changeable between a bed condition where a backrest surface part, a seat surface part, and a foot rest surface part of the wheelchair 100 are changed into horizontal attitudes, and a wheelchair condition, guides 230, 240 are provided on the fixed bed main body 200 for engagement of the wheelchair 100.

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 capable of automatically changing a user from a bed state to a wheelchair state while lying down. It is.

[0002]

2. Description of the Related Art Conventionally, a backrest portion, a seating portion, and a footrest portion have been formed on a bed surface by cutting a part of the bed surface, and the respective surface portions have been flexibly connected to each other. Many multifunctional beds for nursing care and the like have been proposed in which a wheelchair is formed on a part of the bed surface when the bed is turned upside down.

[0003] Many of these multifunctional beds have a structure in which the respective surfaces are connected to each other by a link mechanism, and the respective surfaces are interlocked to bend so that the form can be automatically changed from a bed state to a wheelchair state. A drive source and an angle holding mechanism are provided between the respective surface portions, and the respective drive sources are driven so that each surface portion is bent at an arbitrary angle and held in that state so that a free reclining posture can be taken. is there.

[0004]

However, in the conventional multifunctional bed, it is difficult to fit the wheelchair into the fixed bed main body, and it is difficult to attach and detach the wheelchair.
It is conceivable to increase the gap between the fixed bed body and the wheelchair to reduce the resistance when attaching and detaching, but when using a wheelchair as a part of the bed body, there is a large gap on the bed surface, making it difficult to sleep That leads to another problem.

[0005] In addition, a drive source for changing the inclination angle of the wheelchair between the bed state and the wheelchair state is provided on the bed body to reduce the weight of the wheelchair and reduce the burden on the caregiver when moving. There is. In the case of such a multifunctional bed, it is also difficult to align the drive source with the input joint on the wheelchair side.

[0006] Therefore, an object of the present invention is to make it easy to attach and detach a wheelchair to and from a fixed bed main body in a multifunctional bed of this type that enables a user such as an elderly person or a patient to stand or sleep without special care. It is in.

[0007]

According to a first aspect of the present invention, there is provided a solid bed body having a U-shape and a part of a bed surface which is fitted into a notch of the bed body. A multi-functional bed comprising a wheelchair, a backrest surface portion, a seating surface portion, and a footrest surface portion of the wheelchair changed to a horizontal posture, and a tiltable angle can be freely changed to a wheelchair state. A guide is provided for fitting the wheelchair.

According to a second aspect of the present invention, a drive source for changing the inclination angle of the wheelchair is provided on the fixed bed body, and the guide guide determines a joint position on the wheelchair side to be engaged with the drive source. And a guide for correcting at least the vertical position of the wheelchair.

According to a third aspect of the present invention, the guide includes a guide for correcting a left / right position of the fixed bed body with respect to a notch entrance.

According to the above configuration, when the wheelchair is fitted into the U-shaped solid bed body, the wheelchair is guided to a predetermined position while the left and right and up and down positions are corrected by the guide of the fixed bed body. Thereafter, the joint on the wheelchair side engages with the drive source. Thereby, the wheelchair can be easily fitted into a predetermined position of the fixed bed main body.

[0011]

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a plan view of a multifunctional bed according to the present invention.

As shown in FIG. 2, the multifunctional bed according to the present invention has a substantially rectangular bed surface, the bed surface of which is cut out in a rectangular shape from the side of a foot to form a fixed U-shape. A bed body 200, a backrest surface portion 10 on which the back of the lying person is placed, a seating surface portion 20 on which the waist is placed, and a foot resting surface portion 30 on which the feet are placed are formed and these surface portions 10, 20 are formed. , 30 are formed so as to be freely connected to each other, and the wheelchair 1 is provided on a part of the bed surface.
00 is constituted.

The corners 101r and 201r of the fixed bed body 200 and the wheelchair 100 are formed with curved surfaces.
Are provided with low-density and high-elasticity mats 101 and 201 for preventing bedsores, respectively. The mat 101 of the wheelchair 100 has a backrest surface 1
It is fixed only at two points: a connection portion between the seat surface portion 20 and the foot rest surface portion 30 and a connection portion between the foot rest surface portion 30 and the step 31 formed on the foot rest surface portion 30.

As shown in FIG. 3, the fixed bed main body 200 has four corners of the main body frame 210 supported by bed legs 211, and the bed surface side of the main body frame 210 can be used when a lying person turns over. Guard pipes 212 are provided on the head side, the notch entrance side, and both right and left sides so as not to fall out of the bed surface. The guard pipe 212 on the entrance side of the cutout can be removed when the wheelchair 100 enters and exits.

Further, the fixed bed main body 200 includes a guide for guiding the wheelchair 100 to a predetermined position of the fixed bed main body 200, and the bed main body 200 and the wheelchair 100.
A safety cover 213 provided to cover the tracks of the front wheel 41 and the rear wheel 42 so that the caregiver does not pinch a limb or the like.
And a drive motor 220 serving as a drive source for providing a driving force for raising and lowering each surface of the wheelchair 100. The drive motor 220 is fixed to a motor support frame 214 formed on the main body frame 210.

The guide guide includes a left / right position correction guide 230 for correcting a left / right positional deviation when the wheelchair 100 is introduced, and a drive motor 220, which will be described later, corrects a deviation of the axle height position of the wheelchair 100. And a vertical position correcting guide 240 for adjusting the height position of the female joint 82 and the input joint (male joint) 81 on the wheelchair side.

The right and left position correction guide 230 is moved from the cut-out portion entrance of the fixed bed main body 200 to the fixed bed main body 2.
The guide plate 231 is provided along the inner portions on both sides of the wheelchair 00 and a horizontal roller 232 provided on the head side of the main body frame 40 of the wheelchair 100 and rotating in contact with the guide plate 231.

The guide plate 231 has a wide entrance along the corner of the bed body 200 and a length enough to allow the seat of the wheelchair 100 to be introduced. Is formed.

The vertical position correction guide 240 is shown in FIG.
As shown in FIG. 5, a guide surface 242g for guiding a vertical roller 241 provided near the axle 43 of the rear wheel 42 formed on the main body frame 40 of the wheelchair 100 is formed, and through the vertical roller 241. A guide plate 242 formed with a stopper 243s for stopping the axle 43 guided by the guide surface 242g at a predetermined position extends from the motor support frame 214.

As shown in FIG. 1, the wheelchair 100 is provided on the main body frame 40, and is provided on the main body frame 40, and the backrest surface portion 10, the seating surface portion 20, the footrest surface portion 30, the seating surface portion 20, and the footrest portion. The foot-side link mechanism 50 for connecting the face parts 30, the head-side link mechanism 60 connected for raising and lowering the backrest face part 10, and the backrest face part via the head-side link mechanism 60 receiving power from the drive source It mainly includes a transmission mechanism 70 such as a worm gear for tilting and holding the wheel 10 at an arbitrary tilt angle, and a front wheel 41 and a rear wheel 42 for moving the wheelchair 100. Although not shown, the wheelchair 100 has a fixed brake used when stopping the movement of the wheelchair 100 or when the wheelchair is fitted into a fixed bed body and used as a part of the bed.

Each of the backrest surface portion 10, the seating surface portion 20, and the footrest surface portion 30 is formed in a plate shape having an appropriate size according to the physique of a person lying on the bed.
The backrest surface portion 10 and the seating surface portion 20 are connected by a connecting member 11 such as a hinge so as to be bendable in the mounting direction, and the seating surface portion 20 and the foot mounting surface portion 30 are connected in the mounting direction. Are connected by a connecting member 21 such as a hinge so as to be freely bendable in the opposite direction. The seat surface 20 is swingably supported by the body frame 40.

The foot-side link mechanism 50 is provided with a seat 2
The rotation driving force of the foot-side rotating shaft 51 provided below the lower part 0 and the foot-side rotating shaft 51 is transmitted to the foot-resting surface 30 via the link plate 52 in order to raise and lower the foot-resting surface 30. And a link arm 53 for a foot rest surface portion.

Further, the head-side link mechanism 60 includes a head-side rotating shaft 61 provided at the center of a worm gear 71 provided below the backrest surface 10, and a head for moving the backrest surface 10 down. Link arm 6 for transmitting the rotational driving force of the side rotation shaft 61 to the back surface 10
2 and one end is connected to the head-side rotation shaft 61 via the link plate 63 and the other end is connected to the foot-side rotation shaft 51 via the foot-side link plate 52. And a link arm 64.

As shown in FIG. 5, the transmission mechanism 70 includes a worm gear 71 fixed around a head-side rotating shaft 61 supported by the main body frame 40, and a rotational driving force from a driving source. A worm device including a rod-shaped worm 72 for transmission to the worm gear 71 is provided. The worm 72 is rotatably held with one end 73 a of a shaft 73 facing the worm gear 71 and is fixed in the axial direction.

Further, at the other end 73b of the shaft 73 of the worm 72, the male joint 81 for engaging and disengaging with the drive source is provided as described above. An engagement groove 74 for engaging with an engagement member formed on a female joint provided on the drive source side, which will be described later, is formed radially around the shaft 73 on the male joint 81. .

On the other hand, as shown in FIG. 6A, the above-mentioned female joint 82 is provided at the tip of the shaft on the drive source side.

The female joint 82 is formed with a hole 83 for introducing the male joint 81 and a stopper 84 for stopping the hole 83 at a predetermined position.
When the projection 85t is inserted into the engagement groove 74, the engagement member 85 is engaged when the projection 85t is not inserted into the engagement groove 74, and is pushed up by the male joint 81 when the projection 85t is not inserted into the engagement groove 74.
Is provided. As shown in FIG. 6 (b), the engaging member 85 has a plurality of convex portions 85t provided radially around an axis so as to be freely movable in accordance with the engaging groove of the male joint. The ring 86 presses and stops in the centripetal direction.

Further, the wheelchair 100 is provided with a sub-link mechanism 90 for supporting the waist by tilting the seat surface portion 20 toward the head when the chair is turned from the bed state to the wheelchair state.

The auxiliary link mechanism 90 includes a bendable horizontal adjustment link 91 for holding the seat surface 20 horizontally,
And a tilt adjusting link 92 for bending the horizontal adjusting link 91 to tilt the seating surface portion 20.
One end of the horizontal adjustment link 91 has the seat surface 2.
0 and the other end is supported by the body frame 40 by the pins. One end of the tilt adjusting link 92 has a horizontal adjusting link 91 so that the seat 20 can be tilted in conjunction with the foot-side link mechanism 50.
The other end is connected to the foot-side rotation shaft 51 while being supported by a pin.

Next, the operation will be described with reference to FIGS. 3, 4, 7, and 8. FIG.

In FIG. 7, the constant dashed line indicates the backrest surface portion 10,
The seat surface portion 20 and the foot rest surface portion 30 are shown, and solid lines indicate the foot side link mechanism 50 and the head side link mechanism 60.

In FIG. 8, lines connected by white circles indicate the seating portion 20 on the upper side and the main body frame 40 on the lower side, and lines connected by black circles indicate the horizontal adjustment link 91 and the inclination adjustment link 92. ing.

First, when the wheelchair 100 is fitted into the bed body 200, the wheelchair 100 is
0 is introduced into the bed body 200 with the wheelchair standing upright and facing backward. At this time, as shown in FIG. 3, the horizontal roller 212 of the wheelchair 100 is
After the abutment with the guide plate 231 constituting the right and left position correction guide 230, the side of the seat surface is
Guided inside 0. Then, as shown in FIG. 4, after the vertical roller 241 on the wheelchair 100 side comes into contact with the guide surface 242g of the vertical position correction guide 240, it is moved along the guide surface 242g. Thereby, wheelchair 1
The height of 00 is corrected. Then, by pushing the wheelchair 100 into the head side of the fixed bed body 200, the axle 43
Is stopped at a predetermined position by a stopper 243s, and the male joint 81 on the wheelchair 100 side and the drive motor 220
The female joint 82 on the side is engaged. Thereby, the wheelchair 100 and the bed body 200 are integrally configured.

When the wheelchair 100 is used as a bed, as shown in FIG. 7 (a), the link arm 62 for the backrest surface of the head side link mechanism 60 is moved to the foot side, and the backrest surface portion 10 is moved. Is lowered and inclined substantially horizontally. At the same time, the interlocking link arm 64 of the head side link mechanism 60 is also moved to the foot side,
Thus, the foot-side link mechanism 50 is rotated. By this rotation, the link arm 53 for the foot resting surface is moved to the foot side, the foot resting surface 30 is pushed up and inclined substantially horizontally, and the backrest surface 10, the seating surface 20, and the foot resting surface 30 are arranged horizontally. Is done. And by the transmission mechanism,
It is kept in that state. At this time, as shown in FIG. 8A, the horizontal adjustment link 91 is straightly erected by bending the inclination adjustment link 92, and the seat surface portion 20 is supported horizontally. Thereby, the wheelchair is integrated integrally with the bed body surrounding it.

When the wheelchair 100 is reclined from the bed state shown in FIG.
As shown in (b), the backrest surface link arm 62 of the head side link mechanism 60 is moved to the head side, and the backrest surface portion 10 is pushed up to an arbitrary height and is inclined obliquely. Simultaneously, the interlocking link arm 64 of the head side link mechanism 60 is also moved to the head side, whereby the foot side link mechanism 50 is rotated. By this rotation, the link arm 53 for the foot rest surface is moved to the head side, the foot rest surface 30 is pulled down and inclined obliquely, and the backrest surface portion 10, the seat surface portion 20, and the foot rest surface portion 30 are slightly stepped. Be placed. And it is held in that state by the transmission mechanism. At this time, as shown in FIG. 8B, the inclination adjusting link 92 supports the seating surface portion 20 by slightly bending the horizontal adjusting link 91 so as to incline the seat surface portion 20 toward the head side. This allows
Since the backrest 10 and the footrest 30 are inclined while the waist of the lying person is stably supported by the seating part 20, the lying person can take a reclining posture according to his or her preference.

Further, when the lying person is moved from the reclining state shown in FIG.
As shown in FIG. 7C, the link arm 62 for the backrest surface of the head-side link mechanism 60 is moved to the head side, and the backrest surface portion 10 is further pushed up to stand substantially vertically. Simultaneously, the interlocking link arm 64 of the head side link mechanism 60 is also moved to the head side, whereby the foot side link mechanism 50 is rotated. By this rotation, the foot rest surface portion link arm 53 is moved to the head side, and the foot rest surface portion 30 is further pulled down and stands almost vertically,
The backrest surface portion 10, the seating surface portion 20, and the footrest surface portion 30 are arranged in a step-like manner. And it is held in that state by the transmission mechanism. At this time, as shown in FIG. 8 (c), the horizontal adjustment link 91 is
The seat surface portion 20 is again erected in a straight line, and is returned to be substantially horizontal and supported. Thereby, the form can be automatically changed to the wheelchair state. Then, in the wheelchair state, after the male joint and the female joint are cut off, they are freely moved by the caregiver.

As described above, according to the present invention, it is easy to fit the wheelchair 100 into the fixed bed body 200, and the usability in attaching and detaching the wheelchair 100 is improved.

Further, the drive source 220 is
Because it is provided on the side, the wheelchair 100 becomes lightweight,
The burden on the caregiver is reduced.

Further, by providing a head-side link mechanism 60 for raising and lowering the backrest surface section 10 and a foot-side link mechanism 50 for raising and lowering the footrest surface section 30, the bed surface is bent in a step-like manner and the wheelchair 100 The wheelchair 100 can be held at a desired inclination angle by the transmission mechanism 70.

The safety cover 2 described in the present embodiment
Reference numeral 13 is for securing a wheel passage of the wheelchair 100. The right and left position correction guide 230 and the horizontal roller 23 are provided.
2 is not provided, the rear cover 4
2 can also be guided.

Further, in the present embodiment, the right and left position correction guide 230 is formed to have a predetermined length from the cutout portion of the fixed bed main body 200, but it may be provided over the entire inner part of the fixed bed main body 200. is there.

Further, when a hard tire or the like that does not move up and down is used as the wheel of the wheelchair 100, the position of the male joint 81 of the transmission mechanism 70 is constant irrespective of the weight of the user. It is also possible to implement without providing 240.

[0044]

As described above, according to the present invention, the wheelchair can be easily attached to and detached from the fixed bed body by the action of the guide, and the multifunctional bed of this kind can be used without deteriorating the sleeping comfort. Usability can be improved.

When a guide for correcting the vertical position of the wheelchair is provided, different vehicle heights can be adjusted to a predetermined height position by, for example, deformation of the wheel due to a difference in weight of the user. By this action, it is easy to align the drive source provided on the fixed bed main body to change the inclination angle of the wheelchair with the input joint on the wheelchair side, and the wheelchair can be fixed without being aware of the connection with the drive source. It can be easily fitted simply by pushing it into the notch in the body. When a guide for correcting the left and right positions is provided, the position of the notch entrance of the fixed bed body and the wheelchair can be easily adjusted, and the usability can be further improved.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a wheelchair constituting a multifunctional bed according to an embodiment of the present invention.

FIG. 2 is a plan view of the multifunctional bed according to the embodiment of the present invention.

FIG. 3 is a front view of a bed main body of the multifunctional bed in FIG. 2;

FIG. 4 is a side view of a bed body of the multifunctional bed of FIG. 2;

FIG. 5 is an enlarged view of a transmission mechanism provided in the wheelchair of FIG.

FIGS. 6A and 6B show a joint for connecting a transmission mechanism and a drive source according to the present invention, wherein FIG. 6A is a cross-sectional view and FIG.

FIG. 7 is a view for explaining the operation of the foot-side and head-side link mechanisms of the present invention.

FIG. 8 is a diagram for explaining the operation of the auxiliary link mechanism of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Backrest surface part 20 Seat surface part 30 Foot rest surface part 230 Left-right position correction guide (guide guide) 240 Vertical position correction guide (guide guide)

Claims (3)

[Claims] 1. A U-shaped solid bed body, and a wheelchair that fits into a notch of the bed body and forms a part of a bed surface, and includes a backrest surface portion, a seating surface portion, and a footrest surface portion of the wheelchair. In a multifunctional bed in which the inclination angle can be freely changed between a bed state in which is changed to a horizontal posture and a wheelchair state, a guide is provided when the wheelchair is fitted into the fixed bed body. bed. 2. The fixed bed body is provided with a drive source for changing the inclination angle of the wheelchair, and the guide guide is used to determine a wheelchair-side joint position to be engaged with the drive source. The multifunctional bed according to claim 1, further comprising a guide for correcting at least the vertical position of the multifunctional bed. 3. The multi-functional bed according to claim 1, wherein the guide includes a guide for correcting a left-right position of the fixed bed body with respect to a notch entrance.