JP2003144496A - Wheelchair for transferring to bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair for transferring a patient to a bed easily and smoothly performing a transfer work by a carer alone when transferring the patient between the wheelchair and the bed. SOLUTION: A backrest part 9 and a lower limb support part 14 are connected by a four-joint link mechanism or a hydraulic mechanism so as to be developed flush with a chair seat surface 7. When the backrest part 9, the lower limb support part 14, and a footrest part 15 are developed, those are flush with the seat surface 7 and functioned as a horizontal support base 16. A carriage 1 has a U-shaped space part 30 so as to be vertically moved and inserted from the side of the bed 25 to an approximately bed central part. A raising/lowering frame (fixed seat surface also used as raising/lowering member) provided on the carriage 1 is provided with a rotary seat surface part 3 rotatable approximately through 90 deg. from right to left. The rotary seat surface part 3 is provided with the horizontal support base 16 thereon, the horizontal support base 16 set parallel to the bed is moved and inserted to the approximately central part of the bed, and the horizontal support base 16 is made to incline to the side of the bed 25 so as to slidingly transfer the patient 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair capable of transferring a patient or the like who is a wheelchair user between a wheelchair and a bed, and more particularly to a bed transfer wheelchair capable of reducing work during transfer. It is a thing.

[0002]

2. Description of the Related Art Conventionally, wheelchair users such as critically ill patients and bedridden elderly people are sometimes transferred from a wheelchair to the bed side, but this transfer work causes a great deal of pain to the caregiver. That is, when transferring a patient to the bed side in the conventional wheelchair, after bringing the wheelchair close to the side of the bed, a plurality of caregivers cooperate to lift the patient's body and carry it to the center of the bed as it is. There was a need.

This is also the case when the patient is transferred from the bed to the wheelchair side, and it is necessary for a plurality of caregivers to lift the patient on the bed and carry it to the seat surface of the wheelchair as it is. Moreover, when the patient is lifted, the caregiver is forced to have an unnatural posture, which often causes the caregiver's legs and back to be hurt. Therefore, in order to reduce the work of the caregiver, a deployment type wheelchair has been devised in which the backrest part and the lower limb support part of the wheelchair can be deployed at the same height as the seat surface and can be adjusted to the same height as the bed. (JP-A-10-52459, JP-A-5-329185).

[0004]

However, it has been difficult to eliminate the pain of the caregiver even with the use of the deployable wheelchair. That is, at the time of transfer work, the caregiver needs to lift the patient on the wheelchair and move it laterally to the center of the bed, which requires unnatural labor for the caregiver.
Both patients and caregivers were distressed. Also,
Many problems remain, such as how to move the patient between the wheelchair and the bed, or how to prevent the wheelchair from rolling when the patient is moved laterally. In addition to this, auxiliary devices such as a lifting device using a belt, a method using a roller belt for lateral movement of a patient, and a method using a sliding plate have been proposed. These devices also have merits and demerits, and they do not exert sufficient functions for transfer between a wheelchair and a bed.

As described above, in the prior art, it is often the case that the caregiver requires unnatural and excessive work or that the caregiver is functionally imperfect. The present invention has been made in view of the above problems, and an object thereof is to provide a bed transfer wheelchair capable of easily carrying out a transfer operation by one helper when transferring a patient between a wheelchair and a bed. To do.

[0006]

In order to achieve this object, the present invention has a deployment member such as a backrest portion, a lower limb support portion, and a footrest portion, which is connected to a chair seat surface so as to be deployable, and the deployment member is a chair during deployment. A bed transfer wheelchair configured to form a horizontal support table in the same horizontal plane as a seat surface, the bed wheelchair having a recess for avoiding interference with the bedside portion from the bedside portion to the bed central portion. The rotary seat is provided with a lateral U-shaped carriage that can be forwardly inserted up to It is characterized in that the horizontal support base is disposed on the surface portion.

A deployment drive means for deploying the deployment member on the same horizontal plane as the chair seat surface is provided between the deployment member and the chair seat surface, and a four-bar linkage mechanism or a hydraulic cylinder mechanism is adopted as the deployment drive means. be able to. Further, tilt drive means for tilting the horizontal support base around its longitudinal axis (horizontal axis) is provided between the rotary seat surface portion and the elevating member. This tilting drive means is installed near the rotary seat surface,
The horizontal support table can be tilted on the upper surface of the bed in a stepless or multi-step manner.

According to the present invention, the patient can be transferred to and from the bed and the wheelchair at the center of the bed. Therefore, a U-shaped carriage having a recess for avoiding bed interference is used, and the carriage can be deeply inserted and moved at right angles to the side portion of the bed. A member such as a fixed seat surface or an upper support frame is provided so as to be able to move up and down on the upper part of the carriage, and the lifting member is configured to be adjustable in height according to the height position of the bed. The elevating member can also serve as the upper fixed seat surface of the truck.

Further, a rotating seat surface portion is attached on the elevating member, and the rotating seat surface portion is provided so as to be rotatable 90 degrees to the left and right with respect to the elevating member. The chair seat surface is installed on this rotating seat surface portion. A backrest portion, a lower limb support portion, and a foot rest portion, which are retractable deploying members, are attached to the chair seat surface, and these deploying members have a structure that can be deployed in a horizontal posture at the same height as the chair seat surface. At this time, the backrest portion is tilted by using a deployment drive means such as a four-bar linkage mechanism or a hydraulic mechanism to deploy the backrest portion in the same horizontal plane as the chair seat surface to form a horizontal support base. This horizontal support is a hydraulic jack etc. (elevation drive means)
By using the to move the lifting member up and down according to the height of the bed, it is possible to freely adjust the height to the optimum height for transfer.

At the time of transfer, the wheelchair is vertically approached to the bed from the side part toward the center part. Then, the rotary seat surface portion is rotated 90 degrees leftward or rightward and fixedly set parallel to the bed. After the setting, the deploying member is horizontally deployed so as to be flush with the chair seat surface to form a horizontal support base. At this time, the horizontal support table is arranged parallel to the longitudinal direction of the bed. And with the horizontal support parallel to the bed,
Insert the U-shaped cart deep into the bed. At this time, the wheel mounting portion that is the lower frame of the truck is inserted into the gap between the bed and the floor surface.

In the present invention, the elevating member, which is an upper member of the bogie, is moved up and down to adjust and fix the horizontal support base including the upper rotating seat surface portion at a position higher than the bed. As a result, the U-shaped carriage and the horizontal support can be inserted and moved from the side to the center of the bed. After moving the dolly to approximately the center of the bed, fix the wheels. After fixing, the horizontal support is gradually tilted so that the patient (wheelchair user) on the horizontal support is slid to the bed side and left on the bed while lying down. after this,
The patient is recumbent and the horizontal support is retracted from the bed. After retracting the horizontal support, the patient is then placed on the supine position.

On the contrary, when the patient is transferred from the bed to the wheelchair, the patient is first laid on the bed. Next, the horizontal support table parallel to the bed is slightly inclined to the bed side, and in this state, the horizontal support table is approached from the back side of the recumbent patient. Then, the patient is rotated to the horizontal support table side to change to the supine state, and then the patient is drawn and laid down in the center of the horizontal support table. In this state, the carriage is retracted and pulled out of the bed, and then the backrest is erected. After that, the rotating seat surface portion is rotated by 90 degrees, and the wheelchair is returned to the seatable state and set.

When the patient slides down on the bed and is placed on the horizontal support from the bed, a known sliding plate or a rotating roller type sliding assist device is attached to the rotary seat surface, the backrest and the lower limb support. By using it together, it is possible to easily get on and off the bed. When the patient is supine on a horizontal support, there is a risk that the center of gravity of the patient moves to the head side and the trolley rolls over. In order to prevent this, the position of the center of gravity of the patient in the supine state needs to be aligned with substantially the center of the left and right of the carriage. In order to make the centers of gravity coincide with each other, an inclined hinge of the backrest may be provided near the center of rotation of the rotary seat surface. Or when deploying the backrest horizontally,
It is possible to provide a mechanism capable of slidingly moving the horizontal support table so that the center of gravity position where the horizontal support table and the patient are combined approaches the rotation center by the interlocking slide mechanism.

After tilting the horizontal pedestal, a manual rotation method or a manual lever method or a foot movement is provided in order to facilitate the loading of the patient on the bed or the transfer from the bed to the horizontal support table. A lever-type tilting link mechanism is used. When performing mutual transfer from the horizontal support to the bed, a slight step may occur between the horizontal support and the bed. In order to move the patient over the step, the rotary seating surface, the backrest, the lower limb support, and the like may be provided with a tilting portion that covers the step, whereby the step can be eliminated during transfer. According to this structure, there is no step and a substantially smooth plane for assisting transfer can be formed. Therefore, safe transfer can be performed without causing any pain to the body of the patient.

The wheelchair according to the present invention has the following actions. This wheelchair functions as a stable and comfortable wheelchair when used on a flat floor surface or near the bedside. When the backrest portion is tilted down, the lower limb support portion and the footrest portion are operated in cooperation with each other by the link mechanism or the hydraulic mechanism (deployment drive means) to form a horizontal support base having the same horizontal plane as the chair seat surface. When this backrest is tilted, a pneumatic cylinder with a stopper can be used together to convert the mechanical force when tilting the backrest into air pressure to store energy, so the mechanical force when raising the backrest is equivalent to that amount. It can be reduced and the operation becomes easier.

Further, when the backrest is tilted, the position of the center of gravity of the patient may move to the upper body, and the U-shaped carriage may overturn. In order to prevent this, an inclined hinge of the backrest portion may be attached near the center of rotation of the rotary seat surface portion, or a mechanism capable of sliding the center of gravity when forming the horizontal support base may be used. With this configuration, when the patient is placed, the center of gravity of the patient and the horizontal support stand is located substantially at the center of the left and right wheels.
A stable supporting state can always be ensured.

By providing an elevating member (fixed seat surface portion) that can move up and down on the U-shaped carriage, the rotating seat surface portion disposed on the elevating member can be adjusted without changing the height of the bed. The horizontal support base including can be inserted deep into the bed side, which allows
The patient can be transferred to the center of the bed. Here, when the patient is transferred from the bed to the horizontal support, the maximum force (labor force) required for the caregiver for the patient occurs when the patient is pulled toward the center of the horizontal support. But,
The force required by the caregiver can be obtained in a natural posture by the action of pulling the patient toward the caregiver. For this reason, it can be easily performed by one helper, and the transfer work is significantly improved without the need for several helpers as in the conventional case.

When transferring between the horizontal support and the central part of the bed, a known slide plate or a roller type slip assist mechanism can be used together on the horizontal support, in which case the caregiver's labor can be greatly reduced. The operation can be facilitated. In addition, the operation of inclining the horizontal support table at the center of the bed to transfer the patient causes pain to the patient by attaching a rotary or lever type inclination drive means that can be stopped at any position to the horizontal support table. In addition to not giving it, the operation of transfer work can be performed with less labor.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 is a partially cutaway side view showing an embodiment of a wheelchair according to the present invention, FIG. 2 is a front view showing the wheelchair of FIG. 1, and FIG. 3 is a case where a patient is transferred between the wheelchair of FIG. 1 and a bed. It is a side view explaining the situation of.

This embodiment is a bed transfer wheelchair having members such as a backrest portion, a lower limb support portion, and a footrest portion that can be deployed, and when these are deployed, they are flush with the seat to form a horizontal support base. It is applied and has a U-shaped recess (space) that can be moved and inserted at right angles from the bedside to the center of the bed, and can be rotated about 90 degrees to the left and right via the lifting means on this car. A rotary seat surface portion is provided, and the horizontal support base is installed on the rotary seat surface portion. Further, the backrest, the lower limb support and the footrest are connected by a deployment drive means so that they can be deployed flush with the chair seat surface.In the vicinity of the rotary seat surface, a horizontal support base is provided around its longitudinal axis. It is provided with a means for inclining.

The specific construction of this embodiment will be described with reference to FIG. 1. Reference numeral 1 denotes a side frame having an upper elevating frame (fixed seat surface portion and elevating member) 2, a lower fixed frame (wheel mounting portion) and a vertical frame. It is a dolly. Dolly 1
A rotary seat surface portion 3 is provided on the upper lifting frame 2 so as to be rotatable about 90 degrees left and right. A rotation center shaft 4 and a bearing 5 are arranged between the rotary seat surface portion 3 and the elevating frame 2. A chair seat surface 7 is provided on the rotary seat surface portion 3, and the chair seat surface 7 and the rotary seat surface portion 3 are connected by a hinge 8.

This bed transfer wheelchair has a deployable backrest portion 9, a lower limb support portion 14, and a footrest portion 15, and when these are deployed by a hand lever 10 and an air cylinder (deployment drive means) 11, etc. It is flush with the chair seat surface 7 and is used as a horizontal support 16 (see FIG. 2). Specifically, by operating the hand lever 10 on the upper portion of the backrest portion 9 of the chair 6, the fixing device 12 of the air cylinder 11 can be opened and closed. When the fixing device 12 is opened, the movement of the link mechanism 13 Will be free. As a result, when the backrest portion 9 is tilted, the lower limb support portion 14 and the footrest portion 15 are deployed on the same horizontal plane as the chair seat surface 7, and as shown in FIG.
To form.

Here, the horizontal distance between the tilted hinge 31 of the backrest portion 9 and the rotation center axis 4 of the rotation seat surface portion 3 is set to be short. As shown in FIG. 2, when the backrest portion 9 is tilted to bring the patient 26 to the supine state, the patient 26
This is to prevent the trolley 1 from rolling over due to the position of the center of gravity of the body moving toward the head.

The elevating frame 2 of the U-shaped carriage 1 can be moved up and down with respect to the vertical frame. For example, in order to raise the elevating frame 2, the foot lever 17 may be moved up and down, whereby the hydraulic cylinder (elevating drive means) 18 is extended and the elevating frame 2 is raised. Further, in order to lower the elevating frame 2, it is sufficient to rotate the lowering handle 19, whereby the hydraulic cylinder 1
8 is shortened and the lifting frame 2 is lowered. On this occasion,
By the rotation angle of the descending handle 19, the descending speed of the elevating frame 2 can be arbitrarily adjusted.

FIG. 2 shows a state in which the backrest portion 9, the lower limb support portion 14, and the footrest portion 15 of the chair 6 are horizontally expanded to form the horizontal support base 16. For safe traveling, a front wheel 22 that can be diverted and a rear wheel 23 that cannot be diverted are attached to the lower portion of the bogie 1, and the front wheel 22 and the rear wheel 23 are equipped with a brake. The caregiver pushes the horizontal bar 24, which is the upper frame of the backrest 9, to move the wheelchair forward to the side of the bed 25 (see FIG. 3). When moving forward, the side portion of the bed 25 is accommodated in the U-shaped space portion 30, so that the wheelchair can be inserted deeply into the central portion of the bed 25.

As shown in FIG. 3, the horizontal support 16 is vertically tiltable around the longitudinal axis thereof toward the bed 25. When the patient 26 on the horizontal support table 16 is slid down onto the bed 25 by operating the horizontal support table 16 vertically to the bed 25 side, or conversely when the patient 26 is placed on the horizontal support table 16 from the bed 25, The tilt link mechanism (tilt drive means) 21 is operated by pushing the tilt lever 20 up and down.
It is sufficient to make the telescopic operation. By pushing the tilt lever 20 to a predetermined rotation position and fitting the fitting protrusion (not shown) of the tilt lever 20 into the fitting hole (plural holes are provided) of the tilt fixing plate 32, The horizontal support base 16 can be arbitrarily adjusted and fixed at several angular positions.

By using this wheelchair, as shown in FIG. 3, the patient 26 on the wheelchair can be smoothly transferred between the horizontal support 16 and the bed 25. For example, in order to transfer from the horizontal support base 16 to the bed 25 side, the carriage 1 is moved forward at a right angle to the bed 25,
The insertion is stopped deeply to the approximate center of the bed 25 in the width direction. Then, in this state, the lifting frame 2 of the carriage 1 is moved to the bed
When pushed down to the side by a predetermined distance, the mattress 27 of the bed 25 is slightly depressed by the weight of the patient 26 in the supine position (the state shown in FIG. 3). Then, by operating the tilt lever 20 to fit the fitting protrusion into the fitting hole on the tilt fixing plate 32, the horizontal support base 16 can be tilted toward the bed 25 side to a predetermined angle.

After that, by gently pushing the patient 26 in the supine position on the horizontal support 16 toward the bed 25 side, the body of the patient 26 slides down onto the bed 25 smoothly, and on the bed 25 like the patient 28. Can be in a recumbent position.
In this state, move the wheelchair backward. Next, patient 2 in a recumbent posture
Supine on 8. Here, when the horizontal support base 16 is tilted, one side of the hinge 8 is opened, and the horizontal support base 16 is safely supported by the hinge 8 on the other side.

The patient 28 can be transferred from the bed 25 to the horizontal support 16 by the operation reverse to the above.
In this case, after setting the wheelchair in the state shown in FIG. 3, the patient 28 in the recumbent position is laid on the bed 25 and on the tilting portion 29 of the horizontal support 16. After that, the caregiver
To the center of the horizontal support 16. Then trolley 1
Is moved backward and separated from the bed 25, and then the backrest 9 and the like in the expanded state are raised to set the original chair 6 in the used state. After setting, the chair 6 is rotated 90 degrees to restore the wheelchair to its original state (state of FIG. 1).

As described above, in this embodiment, when the patient 28 is placed on the wheelchair from the bed 25, the patient 28 is laid down on the tilting portion 29 of the horizontal support 16 at approximately the center of the bed 25 and pulled to the center of the bed. After that, the wheelchair is separated from the bed 25, the backrest 9 is raised, and then the horizontal support 16
Can be rotated 90 degrees to reproduce the initial state of the wheelchair.

The present invention is not limited to the embodiments, and various application modifications are possible without departing from the spirit of the present invention.
The present invention is of course applicable to either a manual wheelchair or an electric wheelchair.

[0032]

As described above, according to the present invention, the carriage is provided in the center of the bed by providing the rotary seat surface portion which can be rotated left and right and the deployable horizontal support base on the U-shaped carriage through the elevating means. Since it can be inserted deeply into the part and set, the helper alone can easily perform the transfer work, and the helper's labor can be reduced. Particularly, in the invention of claim 3, the patient can be slid on the center of the bed by inclining the horizontal support table, and smooth transfer work can always be performed safely and reliably, and an assistant at the time of transfer work. It has an excellent effect that the maximum labor required for can be significantly reduced as compared with the conventional one.

According to the second aspect of the present invention, the work for forming the horizontal support base is performed by providing the expansion drive means and deploying the expansion member on the same horizontal plane as the chair seat surface to form the horizontal support base. It can be automated and work time can be shortened.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a wheelchair according to the present invention.

FIG. 2 is a front view showing the wheelchair of FIG.

FIG. 3 is a side view illustrating a situation when a patient is transferred between the wheelchair and the bed of FIG.

[Explanation of symbols]

1 dolly 2 Lifting frame (fixing seat surface lifting member) 3 Rotating seat surface 4 rotation center axis 5 bearings 6 chairs 7 chair seat 8 hinges 9 Backrest (deployment member) 10 Hand lever 11 Air cylinder (deployment drive means) 12 Fixing device 13 Link mechanism 14 Lower limb support (deployment member) 15 Footrest part (deployment member) 16 Horizontal support 17 foot lever 18 Hydraulic cylinder (lifting drive means) 19 descending handle 20 Tilt lever 21 Tilt link mechanism (Tilt drive means) 22 front wheels 23 rear wheel 24 horizontal bar 25 beds 26 patients (supine) 27 mattress 28 patients (recumbent) 29 Aoribu 30 Space (recess) 31 Inclined hinge 32 Tilt fixing plate

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 592249049             Ryo Nishi             13-13 Asahi, Kiyotake-cho, Miyazaki-gun, Miyazaki Prefecture (71) Applicant 501309222             Eizo Taira             4-14-5 Imemedai-nishi, Miyazaki City, Miyazaki Prefecture (72) Inventor Ryo Nishi             13-13 Asahi, Kiyotake-cho, Miyazaki-gun, Miyazaki Prefecture (72) Inventor Eizo Hira             4-14-5 Imemedai-nishi, Miyazaki City, Miyazaki Prefecture (72) Inventor Katsuo Hira             Miyazaki Prefecture Miyakonojo City Hayamizu Town 3535-1

Claims (4)

[Claims] 1. A deployment member such as a backrest portion, a lower limb support portion, and a footrest portion is rotatably connected to a chair seat surface, and the deployment member forms a horizontal support base in the same horizontal plane as the chair seat surface at the time of deployment. A bed transfer wheelchair adapted to:
A side-U-shaped carriage having a recess for avoiding interference with the bedside portion with respect to the bed and capable of being forwardly inserted from the bedside portion to the center of the bed, and a lifting member provided on the upper portion of the carriage so as to be able to move up and down A bed transfer wheelchair characterized in that the lifting member is provided with a rotary seat surface portion that is rotatable left and right 90 degrees, and the horizontal support base is disposed on the rotary seat surface portion. 2. The bed transfer wheelchair according to claim 1, wherein a deployment drive means for deploying the deployment member on the same horizontal plane as the chair seat surface is provided between the deployment member and the chair seat surface. 3. The bed transfer wheelchair according to claim 1 or 2, wherein tilting drive means for tilting the horizontal support table around its longitudinal axis is provided between the rotary seat surface part and the lifting member. . 4. A tilt mechanism of a backrest portion is provided near the center of a rotary seat surface, or a slide mechanism is provided in which the center of gravity is movable in conjunction with the deployment member when the horizontal support base is formed. The bed transfer chair according to any one of claims 1 to 3, wherein