JP2000126247A - Care bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the mutual deviation of a frame, a cushion and a human body by adopting a division frame system by which an upper frame is converted into a chair shape, permitting the whole length of a middle frame and a lower frame to be shorter than that of the upper frame and making the toes of a patient close to a floor surface in case of the chair shape. SOLUTION: The upper frame 2 is constituted of a seat back frame 1, a seat surface frame 2 and a leg part frame 3. A pantograph link mechanism consisting of links E9-H12 is arranged among the frames 1-3 and the upper frame is made to be convertible into the chair shape. The whole length of the middle frame 22 and the lower frame 33 is made to be shorter than that of the upper frame 2, for example, about 60%. By the configuration, the seat back frame 1, the seat surface frame 2 and the leg part frame 3 are continuously changed into the chair shape and the toes of the patient at that time come close to the floor surface. Thus, the patient is prevented from coming off and the comfortable attitude is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed for nursing the elderly, sick, and disabled at hospitals, facilities, or homes.

[0002]

2. Description of the Related Art In a conventional nursing care bed, a bed surface supported by a fixed outer frame is divided, converted into a chair shape by using a plurality of driving devices, and the height of the bed surface is changed by another driving device. Was adjusted.

[0003]

When a conventional nursing bed is formed into a chair, the outer frame of the bed is fixed.
In many cases, the toes do not drop below the bed surface, and when the patient is in a sitting posture, he / she feels pressure on the abdomen. Therefore, it has been difficult to raise the backrest to a nearly vertical angle. In addition, since the projected area of the entire bed on the floor surface does not change, transportation was difficult even when the chair was formed into a shape. In addition, when the backrest is raised, there is nothing to increase or decrease the angle of attack in conjunction with the seat surface, and the patient often feels pain because the back slips.

Conventionally, a so-called floor-lifting function for adjusting the height of the bed surface, a so-called back-lifting function formed in the shape of a chair, and a function for lifting a knee portion are conventionally operated by operating separate motors with separate switches. I was Also, no function is provided to prevent the patient from falling sideways when standing up. Further, in the case of a chair shape, there is a drawback that the gap between the frames, the cushion, and the human body is displaced from each other because the interval between the frames does not change due to the rotation of the adjacent frames.

[0005]

The nursing care bed according to the present invention employs a frame system in which the upper frame is divided so as to be convertible into a chair shape, and the total length of the middle frame and the lower frame is approximately 60% of the total length of the upper frame. With this configuration, when the chair is shaped, the length of the bed can be shortened, the toes of the patient can be lowered to a position close to the floor, and the angle of the backrest can be set to about 75 degrees from horizontal. Like that.

In the interlocking mechanism between the seat frame and the backrest frame, a drive arm for changing the angle of attack of the seat surface is provided.
By rotating around the top dead center, the angle of attack of the seat surface accompanying the tilt of the backrest is increased or decreased.

[0007] A single drive device such as an electric motor is mounted between a mechanism for converting the upper frame into a chair and a mechanism for driving the elevating device. And can be performed continuously.

[0008] In order to prevent the patient from falling down sideways when the backrest is set up, a part of the bed cushion on the movable frame installed on both sides of the backrest frame is linked with a link linked to the tilt of the backrest. It can be set almost vertically by the mechanism.

Adjacent frames of the divided upper frame are connected using a panda graph link, and a mechanism that changes the interval between the frames when the angle between adjacent frames changes, thereby enabling rotation between the frames. The center is close to the center of rotation of the patient's hips and knees. The above structure is intended to solve the above problem.

[0010]

In the mechanism for changing the angle of attack of the seat frame in conjunction with the angle of the backrest, the arm for driving the link that pushes up the seat frame is rotated within a range sandwiching the top dead center, so that the backrest can be moved. When the angle is about 30 degrees from horizontal, the angle of the seating surface is larger than the angle of the backrest to prevent the patient's body from sliding down, and as the backing angle further increases, the angle of the seating surface increases. I try to reduce the angle.

The pandagraph link mechanism provided between adjacent frames for converting into a chair shape has a feature that the interval between the frames changes when the angle between the frames changes. The center of rotation is close to the center of rotation of the patient's waist and knees.

A pandagraph link provided between the backrest frame and the seat frame, and a pandagraph link provided between the seat frame and the leg frame are connected to an arm for changing the angle of attack of the seat frame. When the arm is rotated, the backrest portion, the seating surface portion, and the leg portion are interlocked to continuously change from the bed shape to the chair shape.

A link mechanism consisting of a pair of three-dimensional X-shaped links and two arms each is mounted between the middle frame and the lower frame, and a drive arm is mounted on one of the rotating shafts of the arm. The bed can be moved up and down while maintaining parallelism with the upper and lower frames by providing an elevating device that changes the distance between the upper and lower frames by rotating it.

[0014] By connecting one end of a drive device driven by electric power or the like to a drive arm of a lifting device and the other end to an arm for driving a link for pushing up a seat frame, when the drive device is in a longest state, The height of the chair is at the lowest position, and the backrest is in the state of the most upright chair. As the drive decreases in length, the backrest decreases in angle and the bed returns to a horizontal position. At this time, the arm that drives the link that pushes up the seat frame is in a state where it can no longer rotate with the stopper,
As the drive further reduces its length, the drive arm of the elevating device rotates while the bed remains horizontal and the bed rises until the height of the bed is at the highest position, and the drive is in the shortest state.

[0015] From this state, as the drive device gradually increases in length, the operation becomes the reverse of the above, the height of the device is lowered to the lowest position, and the stopper provided between the middle frame and the lower frame is used to stop the lift device. Because the drive arm cannot rotate any further, as the drive increases further, it drives a link that pushes up the seat frame, in conjunction with which the bed changes from a horizontal state to a chair state. With such a configuration, the lifting and lowering of the bed and the conversion to the chair shape can be performed alternately and continuously by a single driving device.

[0016] A movable frame installed on both sides of the backrest frame and a rotating arm installed adjacent thereto are connected by rods having ball joints at both ends, and the backrest frame and the seat frame are connected to each other. The panda graph link provided between the arm and the rotating arm is connected, and the arm is rotated in conjunction with the tilt of the backrest.As the backrest angle increases, the movable frame horizontally moves a part of the bed on both sides of the patient. By pushing up from the position to an angle close to vertical, the patient can be prevented from falling sideways when the backrest is raised.

[0017]

When the angle of the backrest is from horizontal to approximately 30 degrees, the angle of attack of the seating frame is larger than the angle of the backrest, and as the angle of the backrest further increases, the angle of the seating surface increases. Because the angle is reduced and the patient's legs can be lowered close to the floor, when the backrest angle is shallow, the patient's legs are higher than the upper body,
Can take a posture that restores lower body swelling and congestion, prevents the patient's body from slipping during the process of raising the backrest, and keeps the patient's legs close to the floor when the backrest is fully up. Because it can be lowered to the abdomen and knees, it is possible to maintain a comfortable and comfortable posture.

Since the length of the middle and lower frames is approximately 60% of the length of the upper frame, the overall length of the bed is short when the backrest is upright, and the bed can be moved by the caster wheels mounted on the lower frame. It has the advantage of being easy to carry.

A pandagraph link provided between adjacent frames for converting into a chair allows the center of rotation between the frames to be closer to the center of rotation of the patient's waist and knees, and the bed and mattress, and the mattress and human body. Can be prevented from shifting. Along with this, the footboard surface fixed to the distal end of the leg frame also reduces the distance between the frames of the knee, and thus has an effect of approaching the position for supporting the heel of the patient when the chair is shaped.

A sliding mechanism is mounted on a mounting portion of the X-shaped link frame by mounting a lifting mechanism of a link mechanism comprising a pair of X-shaped links and two arms between the middle frame and the lower frame. By driving one of the mounting shafts of the arm to the frame in an appropriate angle range, it is possible to level the load of the driving device by electric power or the like substantially over the entire length of the lifting stroke. Note that this mechanism causes a slight displacement in the longitudinal direction between the upper and lower frames during ascent and descent, but does not cause any harm.

By connecting one end of a drive device driven by electric power or the like to a drive arm of a lifting device and the other end to an arm for driving a link for pushing up a seat frame, almost all of the stroke of the drive device can be achieved. From the central part to the longest part, it is used for conversion between bed and chair shape, and the remaining shortest part can be set to the most appropriate bed height in case of patient treatment or care, etc. Since the mechanism is used for raising and lowering the bed, the raising and lowering of the bed and the conversion to the chair shape can be performed alternately and continuously by a single driving device. This also gives
The operation switch of the drive device can be a simple operation of only the expansion / contraction instruction, and the cost and weight can be significantly reduced.

The movable frame provided on each side of the backrest frame raises a part of the bed on both sides of the patient as the angle of the backrest increases, thereby raising the backrest. Can be prevented from falling sideways.

The headboard, which is attached to the head-side end of the backrest so as to be tiltable, is kept substantially vertical even if the angle of the backrest changes. The articles attached to the board will not hang or fall down to obstruct the patient's head, and the arm provided on the headboard will shift the center of rotation of the tilt, thereby maximizing the angle of the backrest. At times, the overall height can be less than or equal to the height of a general indoor gate.

[0024] The care bed of the present invention is configured as described above, so that an arbitrary and appropriate posture from the lying position to the sitting position can be obtained without giving a patient any burden or burden, and without requiring complicated operations. The height of the bed can be set from about 40 cm, which is an appropriate height when the patient gets on and off the bed, so as to minimize the burden on the caregiver in the case of nursing care or the like. Any height up to centimeters can be set, and since the power unit for driving them is also a single unit, it has a feature that it is inexpensive and easy to operate as compared with other devices having similar functions.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. In the upper frame divided into three so that it can be converted into a chair shape, the panda graph link mechanism provided between the adjacent backrest frame 1 and the seating frame 2 includes a link A5, a link B6, a link C7, and a link D.
8, a pandagraph link mechanism provided between the seat frame 2 and the leg frame 3 includes a link E9, a link F10, a link G11, and a link H12.
As is clear from comparison of FIGS. 2, 5 and 6, the interval between frames changes when the angle between both adjacent frames changes. The center of rotation between the frames is close to the center of rotation of the patient's waist and knees.

The expansion and contraction operation of the drive motor 17 is performed by a cross bar 21 and a skew member 20 forming a triangle by being connected to a T-shaped plate 19 connected to an end 18 of the drive motor 17 on the motor side. , And the angle of attack of the seat frame 2, whose end on the backrest side is pivotally attached by the bracket 25 fixed to the middle frame 22, is changed via the link 113. At this time, since the arm 4 rotates beyond the top dead center of the connection point with the link 113, the angle of attack of the seat frame 2 changes with the maximum value interposed therebetween.

The motor-side end 18 of the drive motor 17
The tip of the T-shaped plate 19 connected to the middle frame 2
By being slidably supported by a guide rail 23 fixed to 2 via a bearing 24, the drive motor 17 is constantly held on the motor side during expansion and contraction operations.

A link J5 of the pandagraph link mechanism provided between the backrest frame 1 and the seat frame 2 and an arm 4 for changing the angle of attack of the seat frame are connected to a link J1.
4, a link point 15 between the link E9 and the link G11 of the pandagraph link mechanism provided between the seat frame 2 and the leg frame 3, and the arm 4 for changing the angle of attack of the seat frame. Connect at K16. Thus, with the rotation of the arm 4, two sets of pandagraph link mechanisms are linked by the link 5 and the link 13, and the backrest frame 1, the seat frame 2, and the leg frame 3 are shown in FIGS. 5 and 6. Thus, the shape is continuously changed from the bed shape to the chair shape.

At this time, by rotating the arm 4 within a range sandwiching the top dead center, the angle of the backrest can be set to about 30 degrees from the horizontal.
Until the degree, the angle of attack of the seat is larger than the angle of the backrest to prevent the patient's body from sliding down, and as the angle of the backrest further increases, the angle of the seat is reduced. I have. FIG. 5 shows a state where the angle of attack of the seating surface is maximum, and FIG. 6 shows a state where the angle of the backrest is maximum.

The end 26 on the telescopic rod side of the drive motor 17
Is the rotation shaft 30 of the arm 29 in which the rotation shaft 32 at one end is connected to the other end of the link N28 fixed to the lower frame 33.
Is connected to the arm 31 attached to the arm. Rotating shaft 30
Are pivotally attached to and held by a bracket 37 attached to the middle frame 22. As a result, the drive motor 17 is held during the entire expansion and contraction strokes.

On the other hand, the rotating shaft 34 at one end is connected to the middle frame 2.
The link P35 pivotally connected to No. 2 is linked to the link N28 and the midpoint 2
7 are connected to each other to form an X link, and the other end of the bracket 38 is attached to the lower frame 33 via an arm 36 which is parallel to the arm 29 and has the same length.
Is pivoted to. With this configuration, as the telescopic rod of the drive motor 17 contracts from the state shown in FIG. 3, the arm 31 rotates, and the X-link changes the crossing angle of each other. Will increase.

The lower frame 33 is provided with caster wheels 39 at four corners thereof. A foot board 40 is mounted on the leg frame 3.

A movable frame 42 installed on both sides of the backrest frame 1 via hinges 41 and a rotating arm 43 installed adjacent thereto are connected by rods 44 having ball joints at both ends, and The link B6, which constitutes a pandagraph link provided between the backrest frame 1 and the seat frame 2, is connected to the rotating arm 43 by a link L45, and the rotating arm 43 is linked with the tilting of the backrest frame 1.
5 and 6, as the angle of the backrest increases, the movable frame 42 pushes up a part of the bed on both sides of the patient from the horizontal position to an angle close to the vertical, so that the backrest is lifted. The patient can be prevented from falling sideways when standing.

A rotating shaft 46 is attached to the front end of the backrest frame 1.
The lower part of the headboard 47 that is tiltably attached to the movable board 42 and the rotating arm 43 that is installed adjacent to the movable frame 42 are connected by a link M48, so that the headboard is linked with the tilt of the backrest frame 1. The angle of the headboard 47 is kept substantially perpendicular to the floor surface even when the angle of the backrest is increased, as shown in FIGS.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire care bed of the present invention. This figure shows a state where the bed is set at the horizontal and lowest position. In this drawing, the top plate of the bed and the mattress are omitted.

FIG. 2 is a side view showing the entire bed in the state of FIG.

FIG. 3 is a side view showing a center cross section of the bed in the state of FIG. 2;

FIG. 4 is a side view showing a central cross section when the height of the bed is maximum.

FIG. 5 is a side view showing a state in which the angle of attack of the seat surface of the bed is maximum.

FIG. 6 is a side view showing a state in which the backrest angle of the bed is at a maximum.

[Explanation of symbols]

 (1) Backrest frame (2) Seat frame (3) Leg frame (4) Attack angle drive arm of the seat (5) Pandagraph link A (6) Pandagraph link B (7) Pandagraph link C ( 8) Pandagraph link D (9) Pandagraph link E (10) Pandagraph link F (11) Pandagraph link G (12) Pandagraph link H (13) Attack angle drive link I of seating surface I (14) Connection link J (15) pivot point of link E and link G (16) connecting link K (17) drive motor (18) motor side end of drive motor (19) T-shaped plate (20) skew material (21) cross Bar (22) Middle frame (23) Guide rail (24) Bearing (25) Support bracket for seat frame (26) Telescopic rod side end of drive motor (27) (28) X link N (29) X link N holding arm (30) X link N drive shaft (31) X link N drive arm (32) X link N (33) Lower frame (34) X link P holding axis (35) X link P (36) X link P holding arm (37) X link N support bracket (38) X link P support bracket (39) Caster wheel (40) Foot board (41) Movable frame hinge (42) Movable frame (43) Movable frame drive arm (44) Movable frame drive rod (45) Link L (46) Headboard pivot point (47) ) Headboard (48) Link M

Claims (8)

[Claims] 1. An upper frame capable of converting a frame constituting a bed into a chair shape while a patient is placed thereon, a middle frame supporting the upper frame, and a lower frame supporting the middle frame via an elevating device. A nursing bed having a configuration, wherein the length of the middle frame and the lower frame is shorter than that of the upper frame so that when the upper frame is converted into a chair shape, the patient's foot can be lowered to a position lower than the lower frame. 2. An adjacent frame of an upper frame divided so as to be convertible into a chair shape is bent by being connected by a panda graph link comprising an X-shaped link and two links pivotally connected thereto. The care bed according to claim 1. 3. A mechanism is provided for changing the angle of attack of the seat surface by rotating a support member for changing the angle of attack of the seat surface with the top dead center therebetween. The care bed according to claim 1. 4. A panda graph link connecting two adjacent frames of an upper frame divided into three parts, and a support member for changing an angle of attack of a seating surface portion, so that rotation of the support member is prevented. 2. The nursing care bed according to claim 1, wherein the upper frame divided into a backrest, a seating surface, and a leg can be formed in a chair-like manner in conjunction therewith. 5. The middle frame and the lower frame are connected by an X-link in which two members are pivotally connected to each other at a midpoint, and a link mechanism which is pivotally connected thereto and has two arms of the same length which are parallel to each other. 2. The nursing care bed according to claim 1, further comprising a lifting device having a mechanism for changing a distance between the upper and lower frames by rotating one of the mounting shafts of the arm to the frame. 6. A member for raising and lowering the bed and a member for converting the bed into a chair shape by a driving device capable of changing a distance between two points, and operating the driving device to thereby form the bed. 2. The nursing care bed according to claim 1, further comprising a mechanism capable of continuously performing the lifting and lowering of the device and the operation of converting the upper frame into a chair shape. 7. A headboard attached to the head-side end of the backrest portion of the divided upper frame so as to be tiltable, and a pandagraph link connecting the backrest portion and the seat surface portion. The headboard is configured to be substantially vertical even if the angle of the backrest changes.
Nursing bed described in. 8. A movable frame rotatably mounted on both sides of the backrest portion of the divided upper frame is rotated in conjunction with the tilt of the backrest, so that the movable frame is moved as the backrest angle increases. The care bed according to claim 1, wherein the frame is configured to push up a part of the bed on both sides of the patient.