JPH08154978A - Bed - Google Patents

Abstract

PURPOSE: To provide a bed which can make back-raising action and knee-raising action for a person to be nursed by one driving mechanism. CONSTITUTION: When a cam member 13 is moved in the arrow mark A direction by rotating positively a motor 6 from a horizontal condition of operating plates 21-23, a roller 26 is pushed by a projected part 14 and an arm 24 is rotated clockwise to make the operating plate 21 perform back-raising action. At the same time, a roller 27 is elevated on the projected part 15 and an arm 25 is elevated in the arrow mark D direction to make the operating plates 22 and 23 bend into a chevron shape and to perform knee-raising action. When the cam member 13 is moved in the arrow mark B direction by rotating reversely the motor 6 from the horizontal condition, the roller 26 is only moved on the bottom face 16 and the roller 27 is elevated on the projected part 14 from the bottom face 17 and the arm 25 is elevated in the arrow mark D direction to perform only the knee-raising action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed, and more particularly, to a bed on which a caregiver lying on the bed can lift or return the knee or back of a caregiver to a horizontal state by a simple mechanism. Regarding

[0002]

2. Description of the Related Art When a cared person who is bedridden and needs care, such as a sick person or an elderly person, eats a meal, reads a book, or bends the knees of a horizontally extending leg slightly. For example, it is necessary for a caregiver to hold the back of the caregiver while holding the back, apply a support such as a pillow to the back, or provoke a knee and insert a support such as a pillow under the knee. It requires considerable effort.

Therefore, conventionally, there has been proposed a bed in which a portion of the bed which touches the back and knees of the cared person can be moved up and down to change the posture of the cared person lying on the bed. And such a conventional bed that can adjust the posture of the cared person,
The elevating mechanism for elevating the back and the elevating mechanism for elevating the knee are configured to be operated by different drive mechanisms, and are operated by a complicated elevating mechanism.

[0004]

However, in the bed having the conventional lifting mechanism, the lifting mechanism for lifting the back of the care-receiver and the lifting mechanism for lifting the knee are operated by different drive mechanisms. However, the bed itself is large, heavy, and expensive.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bed having an elevating mechanism of small size, light weight, inexpensive and simple structure which can be easily installed even in a general household.

[0006]

According to the bed of the present invention, the caregiver lying on the bed is positioned above the waist to the head side, and is centered around the position where the waist rests, and at least a predetermined angle above the horizontal state. A rotatable upper plate part, and a lower part on which the caregiver's waist part to the foot part side are located, and at which the caregiver's knee part is placed, and which can be bent and raised upward at least a predetermined angle from a horizontal state. A plate member having a plate portion, in which the upper plate portion and the lower plate portion can operate independently, rotating means for rotating the upper plate portion, and the knee portion of the lower plate portion A bending means that pushes up the position where the load is placed and bends it, and a linkage means that engages with the rotation means and the bending means to operate the rotation means and the bending means simultaneously or separately, and the linkage. To drive the rotating means and the bending means. Driving means for operating the rotating means and the bending means through the linking means by the driving means to rotate the upper plate portion around a position where the waist of the care receiver rests. By performing the back raising operation of the care receiver, the bed is configured to perform the knee raising operation of the care receiver by bending and raising the lower plate portion at a position where the care receiver's knee portion rests. Then, the above-mentioned object is achieved.

In this case, for example, as described in claim 2, the lower plate part is divided into an upper foot side plate part and a lower foot side plate part at the position where the knee part is placed, and the upper part It is preferable that the foot side plate portion and the lower foot side plate portion are bendably connected by a connecting member.

Further, for example, as described in claim 3, in the above, one end of the rotating means is coupled to the upper plate portion in the vicinity of a position where the waist of the care receiver rests, And it is rotatably supported at that position, and the other end is
A bending arm that abuts on the linking means, wherein the bending means has one end connected to the lower plate near the position where the knee rests and the other end abutting on the linking means. The linking means has a predetermined number of recesses and projections of a predetermined shape formed on the surfaces of the rotating arm and the bending arm that come into contact with each other, and is moved by the drive means so that the unevenness is formed. It may be a cam member that operates the rotating arm and the bending arm.

Further, for example, as described in claim 4, the linking means causes the rotating means to move in the head direction of the care-receiver at the side surface of the convex portion at the head-direction end of the care-receiver. By pushing, the upper plate portion is rotated in the back-raising direction, and by pushing the bending means upward by the convex portion, the lower plate portion can be bent.

Further, for example, as described in claim 5, the linking means moves the moving means in a head direction and a foot direction of the care-receiver to thereby cause the rotating means and the bending means. Can be configured to operate as described above, and further, for example, as described in claim 6, the linking means can rotate the rotating means by rotating it in a substantially horizontal direction. The means and the bending means may be configured to operate as described above. Still further, for example, as described in claim 7, the linking means is configured to rotate the linking means in a substantially vertical direction.
The rotating means and the bending means may be configured to operate as described above.

[0011]

Therefore, according to the bed of the present invention, the care receiver lies on the independently operable upper plate portion and lower plate portion, and the upper plate portion extends from the waist of the care recipient to the head side. It is located above it, and is rotatable at least a predetermined angle upward from the horizontal position about the position where the waist is placed, so that a so-called back-raising operation can be performed. Further, the lower plate portion can be bent upward at a predetermined angle from at least the horizontal state at a position where the caregiver's waist portion is positioned above the foot portion side and the caregiver's knee portion is placed thereon.

The upper plate portion is rotated by the rotating means, and the knee portion of the lower plate portion is pushed up and bent by the bending means. When the linking means is engaged with the rotating means and the bending means and the driving means drives the linking means, the linking means connects the rotating means and the bending means to each other.
Simultaneously or separately, the upper plate is rotated at the position where the caregiver's waist rests to raise the back of the caregiver, and the lower plate is placed on the caregiver's knee. The care recipient's knees are lifted by bending at.

Therefore, by one driving means, the rotating means and the bending means are operated simultaneously or separately via the linking means to simultaneously perform the back raising operation and the knee raising operation of the care receiver, or Can be done separately. In this way, the bed that can perform the back-raising operation and the knee-raising operation can have a simple structure. as a result,
The bed capable of performing the back raising operation and the knee raising operation can be inexpensive, and can be made small and lightweight.

In this case, for example, as described in claim 2, the lower plate part is divided into an upper foot side plate part and a lower foot side plate part at the knee part, and the upper foot side plate part and the lower foot part are divided. Assuming that the side plate portion is bendably connected by a connecting member,
The lower plate part has a simple structure and can be bent well,
And it can be made inexpensive.

Further, for example, as described in claim 3, one end of the rotating means is fixed near the position where the lumbar region of the care receiver rests on the upper plate portion, and the other end abuts on the linking means. The bending means is composed of a rotating arm, and one end of the bending means is connected to the lower plate portion in the vicinity of a position where the knee portion rests, and the other end is formed of a bending arm which abuts on the linking means. Then, the linking means is formed with a predetermined number of recesses and projections of a predetermined shape on the surface on which the rotating arm and the bending arm are in contact, and the linking means is moved by the driving means. When the cam member is configured such that the pivoting arm and the bending arm operate along the concave and convex portions, the bed for performing the back raising operation and the knee raising operation is further simplified. Can be

Further, for example, as described in claim 4, the linking means rotates the upper plate portion in the back raising direction by pushing the rotating means toward the care receiver's head on the side surface of the convex portion. When the lower plate portion is bent and lifted by moving and pushing the bending means upward by the convex portion, the linking means can have a simple structure.

Further, for example, as described in claim 5, the linkage means is moved in the head direction and the foot direction of the care-receiver to operate the rotating means and the bending means. In this case, the linking means and the driving means can have a simple structure. Further, for example, claim 6
As described in (1) above, when the rotating means and the bending means are operated by rotating the linking means in a substantially horizontal direction, the linking means and the driving means can be further downsized. Still further, for example, when the linkage means is configured to operate the rotation means and the bending means by rotating the linkage means in a substantially vertical direction as described in claim 7, the linkage means and the driving means are similarly driven. The means can be further miniaturized.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The examples described below are preferred specific examples of the present invention, and therefore, various technically preferable limitations are given. However, the scope of the present invention is not limited to the present invention particularly in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

1 to 4 are views showing an embodiment of the bed of the present invention. FIG. 1 is a side view of a bed 1 according to the present invention. In FIG. 1, the bed 1 has four legs 2,
Upper frame 3 and lower frame 4 are attached to 2 ...
The drive unit 5a of the elevating mechanism 5 is installed on the lower frame 4, and the operating unit 5b of the elevating mechanism 5 is assembled on the upper frame 3. Driving unit 5a of the lifting mechanism 5 described above
Is a structure in which the linking means and the driving means thereof are embodied in the present invention, and the operating portion 5b is a plate member including an upper plate portion and a lower plate portion in the present invention and the upper plate portion. And a bending means that pushes up the position where the knee portion of the lower plate portion is placed and bends it.

The drive unit 5a of the elevating mechanism 5 includes a motor 6, a speed reducer 7, a screw 8, a pair of guide shafts (see FIG. 2) 9a, 9b, and a pair of support members 10a for rotatably supporting the screw 8. 10b, two pairs of support members 11a for supporting the guide shafts 9a, 9b,
11b, 12a, 12b and cam member (coupling means) 13
And the like, the cam member 13 is guided by the pair of guide shafts 9a and 9b, and is rotated by the screw 8.
In FIG. 1, it moves in the head direction indicated by arrow A and the foot direction indicated by arrow B.

That is, as shown in FIGS. 1 and 2, the motor 6 is attached to the head side on the lower frame 4 and
The input side shaft of the speed reducer 7 is connected to the shaft of. The output shaft of the speed reducer 7 has a screw 8
When power is supplied from a power supply circuit and a drive circuit (not shown), the motor 6 is rotated normally or reversed by the operation of an operation unit (not shown), and the screw 8 is passed through the speed reducer 7.
Forward or reverse. As the name implies, the screw 8 is formed with a spiral in a predetermined direction. The motor 6 and the speed reducer 7 are fixed to the lower frame body 4 by bolts.

The motor 6 has a built-in lock mechanism, and its rotation is locked by the lock mechanism when the power supply is stopped. The speed reducer 7 reduces the rotation of the motor 6 to a predetermined speed and transmits it to the screw 8 connected to the output side shaft thereof.

The screw 8 comprises a pair of support members 10
a and 10b are rotatably supported by the support member 10
a and 10b are arranged on the head side and the foot side of the bed 1 of the lower frame 4, respectively.

Both ends of the guide shafts 9a and 9b are rotatably supported by a pair of supporting members 11a and 11b and supporting members 12a and 12b, and the supporting members 11a and 11b and the supporting members 12a and 12b are provided. Are fixed to the head portion side and the foot portion side of the bed 1 of the lower frame body 4, respectively.

The cam member 13 is formed in a substantially rectangular shape, and has two projections 14 of a predetermined height on its upper surface.
15 and two bottom surfaces (recesses) 16 and 17 are formed. The convex portion 15 is formed on the end portion of the cam member 13 in the foot portion direction (arrow B direction) to have a predetermined length in the head direction and the foot portion direction. It is formed at a position closer to the head from approximately the center in the head direction and the foot direction.

The convex portion 14 has its head side (see FIG. 1).
The surface on the middle left side is formed substantially at a right angle, and a chamfered notch 14a that is inclined in the foot direction is formed at the upper end portion thereof. The surface of the convex portion 14 on the foot side (right side in FIG. 1) is formed as an inclined surface 14b having a predetermined angle. The surface of the convex portion 15 on the head side is an inclined surface 15a having a predetermined angle.
Is formed. The convex portion 14 and the convex portion 15 are
It has a shape connected by a bottom surface 17, and a bottom surface 16 is formed on the head side of the convex portion 14 over a predetermined length.

The cam member 13 is formed with a through hole through which the guide shafts 9a and 9b penetrate, and a through hole through which the screw 8 penetrates. The through hole through which the screw 8 penetrates is formed. Screw 8
A female screw (not shown) that is screwed into the spiral formed on the is formed.

Therefore, the cam member 13 is guided by the pair of guide shafts 9a and 9b when the screw 8 is normally rotated or reversed, and the cam member 13 is directed toward the head of the bed 1 shown by an arrow A in FIG. It is adapted to move in the direction of the foot shown by arrow B.

The motor 6, the speed reducer 7, the screw 8,
Guide shafts 9a, 9b and support members 10a, 10
b, 11a, 11b, 12a, and 12b function as a driving unit that moves the cam member 13 that is the linking unit as a whole in the head direction and the foot direction.

The operating portion 5b of the elevating mechanism 5 is provided with operating plates 21, 22, 23, arms 24, 25, rollers 26, 27, a shaft 28, a guide 29 and a hinge 30 which are divided into three parts. The operation plate 2 is driven by the portion 5a.
By raising and lowering 1, 22, 23 in an inclined state, a back raising operation and a knee raising operation, which will be described later, are performed.

That is, the operating plate (upper plate portion) 21 is placed on the upper frame 3 at a position corresponding to the head of the caregiver lying on the bed 1 from the waist to the inner end (the lying cover). It is connected to the upper end of the arm 24 at the caregiver's waist). The operation plate 21 and the arm 24 are coupled and fixed and are rotatably supported by a shaft 28, and the shaft 28 is attached to a support member (not shown) fixed to the upper frame body 3. The operation plate 21 and the arm 24 are connected to the shaft 2
8 may be rotatably supported by itself, or may be rotatably supported by the shaft 28 by being fixed to the shaft 28 and being rotatably attached to the support member.

A roller 26 is provided at the lower end of the arm 24.
Is rotatably attached via a shaft 24a, and when the operating plate 21 is in a horizontal state, the roller 26 is provided with a bottom surface 16 of the cam member 13 and a convex portion 14 of the cam member 13 in a steady position for keeping the bed 1 in a horizontal state. It is positioned in contact with the front side surface (side surface on the head side of the lying care recipient).

Therefore, as will be described later, the cam member 1
By moving 3 in the direction of arrow A in FIG. 1, the roller 26 is pushed by the front side surface of the convex portion 14, and the arm 24 and the operating plate 21 are rotated about the shaft 28 in the clockwise direction in FIG. The operation plate 21 performs a back-raising operation. The arm 24 and the roller 26 as a whole function as the rotating means for rotating the operation plate 21 as the upper plate portion.

The operation plate 22 is placed on the upper frame 3 at a position corresponding to the caregiver's waist and knees lying on the bed 1, and the operation plate 23 is placed on the caregiver's knees and feet. Is placed at a position corresponding to the tip direction of the. Operation plate 2
2 and the operation plate 23 are connected and fixed to the hinge 30 at a portion corresponding to the knee of the care receiver, and the shaft 30a of the hinge 30 is connected to the upper end of the arm 25. The hinge 30 is connected to the left and right parts in FIG. 1 about the shaft 30a so as to be rotatable in the vertical direction in FIG. 1 via the shaft 30a. The action plate 22 and the action plate 23 are connected and fixed to the left and right parts of the hinge 30 about the axis 30a.

Therefore, the operating plate 22 and the operating plate 23 are
Is positioned on the bed 1 from the waist of the care receiver to the foot side, and functions as a lower plate part that can be bent upward at a predetermined angle at least from the horizontal state in the care worker's knee.

The arm 25 slidably penetrates through the guide 29, and is guided by the guide 29 so as to be movable only in the vertical direction in FIG.

A roller 27 is attached to the lower end of the arm 25.
Is rotatably attached via a shaft 25a, and when the operating plates 22 and 23 are in a horizontal state, the roller 27 is
The cam member 13 is located in a state of abutting against the bottom surface 17 of the cam member 13 in the steady position, the inclined surface 15a on the front side of the convex portion 15 and the inclined surface 14b on the rear side of the convex portion 14.

Therefore, as will be described later, the cam member 13 is in the direction of arrow A (the direction of the head of the cared person who lies down),
Or, the direction of arrow B (the direction of the lying care recipient's foot)
Roller 27, the roller 27 moves from the bottom surface 17 to the inclined surface 14b.
Alternatively, it climbs up to 15a and reaches the upper surface of the convex portion 14 or the convex portion 15, and the arm 25 moves upward while being guided by the guide 29. Then, the action plates 22 and 23 rise in the connecting portion with the hinge 30 and are bent in a mountain shape, and perform a knee raising action. After that, when the roller 27 returns to the bottom surface 17 of the cam member 13 by the movement of the cam member 13 in the arrow A direction or the B direction, the arm 25 descends and the operating plates 22 and 23 do not return to the horizontal state. Needless to say.

Therefore, the arm 25 and the roller 27 are
And the guide 29 as a whole functions as a bending means that pushes up the motion plate 22 and the motion plate 23 as the lower plate parts to bend up the knees of the care-receiver.

A mattress 31 is placed on the operating plates 21, 22, and 23, and on this mattress 31, ordinary bed sheets and the like are set.

The operation of the motor 6 can be controlled by operating an operation unit (not shown), and the operation unit is arranged at a position where the caregiver sleeping on the bed 1 can operate it. It may be placed in a place where the caregiver can easily operate it. Of course, you may distribute it to both.

This operation section can operate the driving and stopping of the motor 6, and also controls the rotation direction of the motor 6.
That is, it is possible to operate the ascending and descending directions of the operating plates 21, 22, and 23, and it is possible to select whether to perform both back raising and knee raising or only knee raising.

Next, the operation of this embodiment will be described. The bed 1 of this embodiment can raise the back and knees of the care-receiver who is sleeping on the mattress 31 of the bed 1 by one mechanism. That is, the bed 1 is in the steady state shown in FIG. 1 when the care receiver is sleeping in a horizontal state, and at this time, the cam member 13 of the lifting mechanism 5 is located at the steady position.

That is, when the cam member 13 is in the steady position, the roller 26 attached to the arm 24 is
The roller 27 attached to the arm 25 is in contact with the front side surface (left side surface in FIG. 1) and the bottom surface 16 of the convex portion 14 of the cam member 13, and the inclined surface 1 of the convex portions 14 and 15 of the cam member 13.
4b, 15a and the bottom surface 17 are in contact with each other.

In this steady state, when both the back raising operation and the knee raising operation are selected by the operating portion, the motor 6 rotates in the normal direction and the cam member 13 moves in the direction A in FIG. When the cam member 13 moves in the direction A in FIG.
3 is pushed by the front side surface of the convex portion 14 and attached to the lower end of the convex portion 14, the arm 24 is centered on the shaft 28, and the arrow E in FIG.
The operation plate 21 that is rotated in the direction indicated by and is fixedly connected to the arm 24 starts rotating about the shaft 28 in the direction of arrow C in FIG.

Further, by the normal rotation of the motor 6 and the movement of the cam member 13 in the direction A in FIG. 1 based on the normal rotation, the other roller 27 starts to climb the inclined surface 15a, and finally,
Ascends to the flat portion on the upper surface of the convex portion 15. When the roller 27 starts climbing the inclined surface 15a, the arm 25 moves toward the guide 29.
As a result, only vertical movement is allowed, and therefore the robot moves upward in the direction of arrow D. When the arm 25 rises, the hinge 30 connected to the upper end of the arm 25 rises, and the motion plates 22 and 23 connected thereto move the shaft 30a as shown in FIG.
With the center as the center, it rises in a mountain shape in the direction of arrow D.

Therefore, when both the back-raising and knee-raising are selected by operating the operating portion, the motor 6 rotates in the forward direction and the back of the care-giver lying on the bed 1 is raised around the waist. As the knee is lifted, the knees are lifted at the same time, and the back raising operation and the knee raising operation can be performed at the same time.

When the operation stop is instructed during the back raising and knee raising operations by operating the operating portion,
The motor 6 is stopped in a stopped state and is locked by a lock mechanism. The elevating mechanism 5 can be stopped and locked at the back raising angle and knee raising angle intended by the care-receiver.

Although not shown, the elevating mechanism 5 is provided with a safety mechanism, and when a back raising operation or a knee raising operation is performed up to a preset safe maximum position, at that position,
The driving of the motor 6 is stopped, and the motor 6 is locked by the lock mechanism. For this maximum position, for example, when the position of the cam member 13 is detected by a sensor (not shown) and the sensor detects that the cam member 13 has moved to a preset maximum position,
The driving of the motor 6 is stopped.

This sensor detects the maximum movement position of the cam member 13 in the leftward direction (direction A in FIG. 1) in the forward rotation direction of the motor 6, and, for example, the roller 27 has the upper surface of the convex portion 15. The position of the cam member 13 corresponding to the position where the roller 27 has reached the predetermined position on the upper surface of the convex portion 15 is detected.

By the way, in order to return the state of raising the back and raising the knee to the horizontal state, the horizontal state is selected by the operating portion and the motor 6 is rotated in the reverse direction.

That is, when the motor 6 rotates in the reverse direction, the cam member 1
1 moves in the B direction in FIG. 1, and the motion plate 21 itself rotates in the descending direction due to the gravity of the mattress 31 and the care receiver. Further, by the movement of the cam member 13 in the B direction, at the same time, the movement plates 22, 23, the mattress 31, and the gravity of the care-receiver regulate the guides 29 while the arms 25 are pushed down and the rollers 27 of the convex portions 15 are pushed down. The inclined surface 15a is lowered from the upper surface side, and with the lowering of the roller 27, the connecting portion of the motion plates 22 and 23 is lowered along with the arm 25. And finally, the cam member 13
Returns to the normal position shown in FIG.
3 is in a horizontal state.

Further, when only the knee raising is selected by the operating portion from the horizontal state of the bed 1, the motor 6 is rotated in the reverse direction, whereby the cam member 13 moves in the B direction from the steady position, and the roller 26 becomes While moving relatively on the bottom surface 16 in the direction A, the roller 27 starts climbing the inclined surface 14b from the bottom surface 17. In this way, when the roller 27 begins to climb the inclined surface 14b, the arm 25 is restricted by the guide 29 and
Inside, ascending in the direction indicated by the arrow D, the operation plates 22 and 23 are
Ascend to a mountain shape. When the roller 27 climbs up the inclined surface 14b and reaches the convex portion 14, the arm 25 is in the highest lifted state, and the operating plates 22 and 23 are in the highest lifted mountain shape.

At this time, the roller 26 only moves relatively in the direction A on the bottom surface 16 of the cam member 13 as the cam member 13 moves in the direction B, as described above. 24 does not move up and down, and the operating plate 21 maintains a horizontal state.

Therefore, when only the knee raising is selected by the operating portion from the steady state of the bed in the horizontal state, the motor 6 is reversed and the cam member 13 is moved in the B direction to perform only the knee raising operation. You can

As described above, according to this embodiment, the single motor 6 as the driving means moves the cam member 13 as the linking means in the head direction and the foot direction of the bed 1 to rotate the bed 1. The lower part of the arm 24 as the moving means and the roller 26 are moved in the head direction and the foot direction, and the arm 25 and the roller 27 as the bending means are moved in the up-and-down direction so that the operating plate 21 as the upper plate part is predetermined. And the operating plates 22 and 23 serving as lower plate parts.
The bed 1 which can be bent upward at the knee and can perform the back raising operation and the knee raising operation simultaneously or separately has a simple structure, and is configured to be small and lightweight. You can

In this embodiment, the operating plate 2
Although the mattress 31 is placed on 1, 22, and 23, the operating plates 21, 22, and 23 themselves may have a mattress function.

Also, in this embodiment, the cam member 1
By moving 3 in the head direction and the foot direction of the bed 1, the rollers 26, 27 of the arms 24, 25 move between the convex portions 14, 15 of the cam member 13 and the bottom surfaces 16, 17. However, the present invention is not limited to this. For example, a cam member on a disc having a concave portion and a convex portion is rotated in a substantially horizontal state, or a cylindrical cam member having a concave portion and a convex portion is almost By rotating in the vertical direction, the arm 24 and the arm 25 may be operated in the same manner as in the above embodiments.

Further, in this embodiment, the lower portion of the arm 24 connected and fixed to the operating plate 21 at the portion corresponding to the waist of the care-receiver is headed by the front side surface of the convex portion 14 of the cam member 13. By pushing in the direction, the shaft 28 is rotated,
Although the motion plate 21 is rotated about the shaft 28, the motion plate 21 is not limited to this. For example, the motion plate 21 is rotatably installed at a position corresponding to the waist of the care receiver, and the motion plate 21 is rotated. The head-corresponding position of the care receiver may be pushed up by the convex portion of the cam member 13.

Further, in this embodiment, the plate member on which the care-receiver lies is divided into three motion plates 21, 22, 23, but the invention is not limited to these.
In short, it is only necessary that the back raising operation and the knee raising operation can be performed. For example, the motion plate 21 and the motion plate 22 may be connected by an integral member that is expandable and contractible.

Further, in this embodiment, the cam member 13 is moved by the motor 6, but the invention is not limited to this. For example, the cam member 13 is moved by rotating the handle connected to the screw 8. You may make it operate.

Further, in this embodiment, the present invention is applied to the case where the simultaneous operation of raising the back and raising the knee and the independent operation of only raising the knee are performed, but the present invention is not limited to these, and the size of the cam member is appropriately set. By changing the concave and convex shapes, it is possible to perform only the back raising operation or raise only the tip side of the foot.

[0063]

Therefore, according to the bed of the present invention, the care receiver lies on the upper plate portion and the lower plate portion which can be independently operated, and the upper plate portion extends from the waist of the care recipient to the head. The side is located and is rotatable about the waist at least a predetermined angle upward from the horizontal state, and the lower plate part is located at the foot side from the waist of the care receiver and at least at the knee part of the care receiver. It can be bent upward from the horizontal state by a predetermined angle.

Then, the upper plate portion is rotated by the rotating means,
The bending means pushes up and bends the position of the lower plate corresponding to the knee. The linking means is engaged with the rotating means and the bending means,
When the driving means drives the linking means, the linking means operates the rotating means and the bending means at the same time or separately to rotate the upper plate around the waist corresponding position of the care-receiver, whereby The back of the caregiver is raised, and the lower plate portion is bent at the position corresponding to the knee of the care recipient to raise the knee of the care recipient.

Therefore, the rotating means and the bending means are simultaneously or separately operated by the one driving means via the linking means to simultaneously perform the back raising operation and the knee raising operation of the cared person, or The bed which can be performed separately and can perform the back raising operation and the knee raising operation can have a simple structure. As a result, the bed capable of performing the back raising operation and the knee raising operation can be made inexpensive, and can be made small and lightweight.

In this case, for example, as described in claim 2, the lower plate portion is divided into an upper foot side plate portion and a lower foot side plate portion at the knee-corresponding position, and an upper foot side plate portion is formed. If the lower foot side plate portion is flexibly connected by the connecting member, the lower plate portion can have a simple structure and can be inexpensive.

Further, for example, as described in claim 3, the rotating means is such that one end thereof is fixed to the upper plate portion near the waist corresponding position and the other end is in contact with the linking means. The bending means is constituted by an arm, and one end of the bending means is connected to the lower plate portion at a knee-corresponding position, and the other end is in contact with the linking means. Then, the linking means is formed with a predetermined number of irregularities of a predetermined shape on the surfaces of the pivoting arm and the bending arm that come into contact with each other, and is moved by the driving means, whereby the irregularities are formed. If the cam member is used to move the arm, the bed that performs the back raising operation and the knee raising operation can be made even simpler.

Further, for example, as described in claim 4, the linking means rotates the upper plate portion by pushing the rotating means toward the cared person's head by the convex portion, and thereby the upper plate portion is rotated by the convex portion. When the lower plate portion is bent by pushing the bending means upward, the linking means can have a simple structure.

Further, for example, as described in claim 5, when the linking means moves the head and foot directions of the care-receiver to operate the rotating means and the bending means. In addition, the linking means and the driving means can have a simple structure.

Further, for example, as described in claim 6, the linkage means is rotated substantially in the horizontal direction,
When the rotating means and the bending means are operated, the linking means and the driving means can be further downsized.

Further, for example, as described in claim 7, the linkage means rotates in a substantially vertical direction,
When the rotating means and the bending means are operated, the linking means and the driving means can be further downsized.

[Brief description of drawings]

FIG. 1 is a side view illustrating a bed according to an embodiment.

FIG. 2 is an explanatory plan view of the drive unit of the bed according to the embodiment.

FIG. 3 is a side explanatory view showing a state in which the back raising operation and the knee raising operation of the bed of the embodiment excluding the mattress are simultaneously performed.

FIG. 4 is a side explanatory view showing a state in which only the knee raising operation of the bed of the embodiment excluding the mattress is performed.

[Explanation of symbols]

 1 Bed 2 Legs 3 Upper Frame 4 Lower Frame 5 Lifting Mechanism 5a Drive 5b Operating 6 Motor 7 Speed Reducer 8 Screws 9a, 9b Guide Shafts 10a, 10b Supports 11a, 11b, 12a, 12b Supports 13 Cams Member 14, 15 Convex portion 14a Notch 14b, 15a Sloping surface 16, 17 Bottom surface 21, 22, 23 Action plate 24, 25 Arm 26, 27 Roller 28 Shaft 29 Guide 30 Hinge 30a Shaft 31 Mattress

Claims (7)

[Claims] 1. The caregiver lying on the bed is positioned above the waist to the head side, and the waist is centered on the position where the waist rests.
At least an upper plate portion that is rotatable upward from a horizontal state by a predetermined angle, a waist side to a foot side of the cared person above which the knee of the cared person rests, and at least a predetermined state from the horizontal state. A lower plate portion that can be bent upward at an angle, and a plate member that allows the upper plate portion and the lower plate portion to operate independently, and a rotating unit that rotates the upper plate portion, Bending means for pushing up the position of the knee portion of the lower plate portion to bend it, and engaging the turning means and the bending means to simultaneously or separately provide the turning means and the bending means. And a driving unit that drives the linking unit to operate the rotating unit and the bending unit. The driving unit connects the rotating unit and the bending unit via the linking unit. The upper plate portion is operated to By rotating around the position of the guardian's waist, the cared person's back is raised, and the lower plate portion is bent and raised at the position of the cared person's knee, whereby the A bed configured to raise the knees of a cared person. 2. The lower plate part is divided into an upper foot side plate part and a lower foot side plate part at a position where the knee part rests, and the upper foot side plate part and the lower foot side plate part are bent. The bed according to claim 1, wherein the bed is connected by a connecting member. 3. The rotating means has one end coupled to the upper plate portion near a position on which the waist of the care receiver rests, and rotatably supported at that position, and the other end is A bending arm that abuts on the linking means, wherein the bending means has one end connected to the lower plate near the position where the knee rests, and the other end abutting the linking means on the bending arm. The linking means includes a predetermined number of recesses and projections of a predetermined shape formed on the surfaces of the rotating arm and the bending arm that come into contact with each other, and the drive means moves the recesses and projections. The bed according to claim 1 or 2, wherein the portion is a cam member that operates the rotating arm and the bending arm. 4. The linking means pushes the rotating means toward the head of the cared person at the side surface of the convex portion at the end of the cared person in the head direction to raise the back of the upper plate portion. The bed according to claim 3, wherein the lower plate portion is bent by rotating the lower plate portion in a direction and pushing the bending means upward by the convex portion. 5. The linkage means operates the rotating means and the bending means by moving the linking means in a head direction and a foot direction of the care receiver. Bed of item 4. 6. The bed according to claim 3, wherein the linking means operates the rotating means and the bending means by rotating the linking means in a substantially horizontal direction. 7. The bed according to claim 3, wherein the linking means operates the rotating means and the bending means by rotating the linking means in a substantially vertical direction.