JP3437030B2 - Bed device and vertical drive device used for the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed apparatus in which a mattress is placed on a floor plate installed on a bed frame, and a vertical drive apparatus used for the bed apparatus.

[0002]

2. Description of the Related Art When a user lies on the upper surface of a mattress of a bed apparatus, the back and hips of the back of the user protrude, and the waist is constricted. Therefore, the ratio of the load applied to the mattress is said to be larger in the part corresponding to the user's back and the part corresponding to the buttocks than other parts.

If the mattress is a soft one that is easily deformed by a load, the back and buttocks are greatly depressed, and the waist is pushed up. The spine is in a sleeping position in which it is further curved, which increases the burden on the user.

Therefore, recently, a relatively hard mattress has been used to reduce the depression of the back and buttocks when the user is supine, so that the user can sleep in a sleeping posture with less bending of the spine.

By the way, the spinal column of the user is curved downward in the back, curved upward in the lumbar region, and downward in the buttocks in a correct posture with the back muscles extended. ing. When the user lies on a relatively hard mattress with less back and buttocks, the upper surface of the mattress is kept almost flat, so it is located between the back and the buttocks protruding to the back of the user. The lumbar area will not easily adhere to the upper surface of the mattress.

That is, the back and buttocks of the user are firmly supported by closely contacting with the upper surface of the mattress, but the lumbar region is floated from the upper surface of the mattress and is not reliably supported.
Therefore, the lumbar spine of the user's lumbar region may be burdened, which may lead to a reduction in sleeping comfort.

Particularly, in the case of a user whose muscles of the lower back are weakened, such as a sick person or an old person, not only the burden on the lower back may be heavy, but also the shape of the body of a healthy user. Depending on the situation, the burden may increase.

[0008]

As described above, in the conventional bed apparatus, when the user is supine on the mattress placed on the floor plate, a portion having a height different from the back and buttocks such as the waist is provided. May not be reliably supported, which may increase the burden on that part.

The present invention has been made in view of the above circumstances, and its purpose is to ensure that a predetermined part of a user lying on a mattress can be supported at a predetermined height. It is an object of the present invention to provide a bed apparatus and a vertical drive apparatus used for the bed apparatus that can reduce the burden on the person and provide comfortable sleeping comfort.

[0010]

According to a first aspect of the present invention, there is provided a bed frame and a movable member which is supported by the bed frame and in which a part of the bed frame in the longitudinal direction is divided in the width direction. A floor plate formed on the floor and the lower surface of the movable floor, which is vertically driven in a substantially horizontal state, and is held at a predetermined height with respect to other parts of the floor. The drive mechanism is provided with a fixed frame provided along the longitudinal direction in the width direction of the bed frame, and one end at each longitudinal end of the fixed frame. A pair of links that are rotatably connected, and whose middle portions are rotatably connected by a connecting shaft, and the other ends are rotatably connected to both ends in the longitudinal direction of the movable floor, respectively. Longitudinal direction of the fixed frame A rotary shaft that is rotatably supported along the width direction at an intermediate portion, a drive source that is provided on the fixed frame and rotationally drives the rotary shaft, and the rotary shaft is provided on the rotary shaft. It is characterized by comprising a pressing body which is rotated by a drive source to press the connecting shaft to rotate the pair of links in a fallen state in the standing direction.

According to a second aspect of the present invention, in a vertical drive device for vertically driving a plate-shaped movable member, one end of each of the fixed frame and both longitudinal ends of the fixed frame is rotated. A pair of links which are rotatably connected to each other and whose middle portions are rotatably connected by a connecting shaft and whose other ends are rotatably connected to both ends in the longitudinal direction of the movable member, respectively, and the fixed frame. A rotary shaft rotatably supported in the longitudinal direction of the frame along the width direction, a drive source provided on the fixed frame for rotationally driving the rotary shaft, and provided on the rotary shaft. The rotating shaft is rotated in a predetermined direction by the drive source, and is configured to include a pressing body that presses the connecting shaft to rotate the pair of links in the lying state in the upright direction.

According to the first aspect of the present invention, the movable floor part of the floor plate can be horizontally moved up and down by the drive mechanism and held at a predetermined height. The part can be reliably supported. According to the invention of claim 2, the movable member can be moved up and down with a configuration that is easy to manufacture and assemble.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The bed apparatus shown in FIGS. 4 and 5 includes a bed frame 1. The bed frame 1 is formed in a rectangular frame shape in plan view by connecting both widthwise end portions of a head board 2 and a foot board 3 which are arranged in parallel and opposed to each other with a side plate 4. ing.

As shown in FIGS. 3 and 5, receiving rails 5 are provided on the inner surfaces of the pair of side plates 4, and floor boards 6 are provided on these receiving rails 5.
Has been erected. A mattress M indicated by a chain line in the drawing is placed on the floor plate 6.

The floor plate 6 is divided into four parts in the longitudinal direction of the bed frame 1, one of which is located at a substantially central portion in the longitudinal direction of the bed frame 1 in a vertical state in a horizontal state by a drive mechanism 11 which will be described later. It is a movable floor 6a (movable member) to be driven, and the other floors are the above-mentioned bed frame 1
A fixed floor 6b is detachably mounted on the floor.

As shown in FIG. 1, a first bracket 7 is formed by bending both ends of a strip plate into L-shaped tongue pieces at one end and the other end in the longitudinal direction of the lower surface of the movable floor 6a. The second bracket 8 is provided along the width direction. A long hole 7a is formed in the tongue piece of the first bracket 7, and a connecting hole 8a is formed in the tongue piece of the second bracket 8.

The upper surface of the movable floor 6a is formed into a curved surface curved in an arc shape along the longitudinal direction of the bed frame 1. In this embodiment, the movable floor 6a is the second sheet from the headboard 2 side, that is, the portion corresponding to the waist of the user lying on the mattress M, but the position thereof is the fixed floor 6b. It is possible to switch to the position where is provided, so that it is possible to accommodate users of different physiques and preferences of users. For example, the head of the user may be lifted and used instead of the pillow, or when the foot becomes tired, the foot may be lifted and used for recovery from fatigue.

The drive mechanism 11 has a fixed frame 12 as shown in FIGS. The fixed frame 12 is slightly larger than the movable floor 6a, and is formed in the shape of a rectangular frame having a size capable of engaging both ends in the longitudinal direction with the pair of receiving bars 5. It is provided detachably along the width direction of the bed frame 1.

A first mounting member 13 having a U-shaped band plate is provided at one end of the fixed frame 12 in the longitudinal direction with both ends fixed. Long holes 14 are formed at both ends of the first attachment member 13, and a frame-shaped support member 15 is attached and fixed to the upper surface of the middle portion.

Similar to the first mounting member 13, a second mounting member 16 formed by bending a strip plate into a U-shape is fixed to both ends of the fixed frame 12 in the longitudinal direction. Is provided. Third brackets 17 are erected substantially vertically on both ends of the upper surface of the middle of the second mounting member 16. A rotary shaft 18 is rotatably supported on both ends of the pair of third brackets 17.

A fourth bracket 19 and a pressing body 21 having a predetermined length are provided in the middle of the rotary shaft 18 with their one ends fixed to each other. A drive source 22 shown in FIG. 3 is provided between the fourth bracket 19 and the support member 15.

The drive source 22 has a case 23 containing a motor (not shown), and a fixed pipe 24 is provided on the case 23. A drive shaft 25, which is driven in the axial direction by the operation of the motor, is inserted into the fixed pipe 24. The case 23 is pivotally attached to the support member 15, and the tip of the drive shaft 25 is pivotally attached to the fourth bracket 19.

Therefore, when the motor is actuated and the drive shaft 25 is driven in the direction projecting from the fixed pipe 24, the fourth bracket 19 is rotated counterclockwise as shown by the arrow in FIG. On the contrary, if it is driven in the direction of retracting into the fixed pipe 24, it rotates clockwise in the direction opposite to the arrow. When the fourth bracket 19 rotates, the rotation shaft 18 interlocks with the rotation, so that the pressing body 21 provided on the rotation shaft 18 also rotates.

Fourth brackets 26 are vertically provided on both sides of the fixed frame 12 on the other end side in the longitudinal direction. One end of a first link 31 is rotatably connected to each of the fourth brackets 26 by a first connecting shaft 32.

One ends of the second links 33 are connected to the elongated holes 14 at both ends of the first mounting member 13 by a second connecting shaft 34 so as to be rotatable and slidable along the elongated holes 14. Has been done.

The above-mentioned first link 31 and second link 33
The middle part is rotatably connected by a third connecting shaft 35. The other end of the first link 31 is rotatable by a fourth connecting shaft 36 into a long hole 7a of a first bracket 7 provided at one longitudinal end of the lower surface of the movable floor 6a, and the long hole 7a thereof is provided. Are slidably connected along the longitudinal direction of the. The other end of the second link 33 is rotatably connected by a fifth connecting shaft 37 to a connecting hole 8a of a second bracket 8 provided at the other end in the longitudinal direction of the lower surface of the movable floor 6a. .

The third connecting shaft 35 connecting the middle portions of the first link 31 and the second link 33 is the rotating shaft 1 described above.
When the pressing body 21 is rotated in the counterclockwise direction, the pressing body 21 is pressed in the upward direction by one side surface.

When the third connecting shaft 35 is pressed in the upward direction by the pressing body 21, the first link 31 and the second link 33 which are in the laid state as shown by the solid line in FIG. 3 are shown by the chain lines. So that it rotates in the upright direction.

As a result, the movable floor 6a connected to the other ends of the links 31 and 33 via the first and second brackets 7 and 8 rises from the position shown by the solid line to the position shown by the chain line. It is supposed to do.

Between the two longitudinal ends of the movable floor 6a and the bed frame 1, there are provided bellows-like covers 41 which are expandable and contractible as shown in FIG. Thereby,
Even if the movable floor 6a is driven in the ascending direction, the gap between the longitudinal ends of the movable floor 6a and the bed frame 1 is not exposed to the outside.

Although not shown in the drawings, a plate-shaped member instead of the cover 41 is provided vertically on the lower surface of both ends in the longitudinal direction of the movable floor 6a, so that when the movable floor 6a rises, the bed frame 1 The outside may not be exposed through the gap between and.

Next, the case of using the bed apparatus having the above configuration will be described. Usually, the movable floor 6 of the floor plate 6
The height a is substantially the same as the fixed floor 6b. In this state, the first link 33 and the second link 34 for moving the movable floor 6a up and down are lying down as shown by the solid line in FIG.

When the drive source 22 is actuated from such a state to project the drive shaft 25 from the fixed pipe 24, the entire length of the drive source 22 is extended, so that the fourth bracket 19 is rotated counterclockwise. The rotation shaft 18 is interlocked with the rotation.

When the rotary shaft 18 rotates, the rotary shaft 18
The pressing body 21 provided at the position also rotates. As a result, the pressing body 21 presses and raises the third connecting shaft 35 that connects the middle portions of the first link 33 and the second link 34, so that the first and second links 33, 33 34 rotates in the standing direction.

Since the movable floor 6a is connected to the first and second links 33 and 34, the movable floor 6a is shown by the first and second links 33 and 34 in FIG. It is lifted from the position to the position shown by the chain line.

Therefore, if the movable floor 6a is raised until the user's waist can be reliably supported, the burden on the lumbar spine of the user's waist can be reduced. Especially for users with weakened muscles in the lower back, such as the sick and the elderly,
Since the burden on the lower back is greatly reduced, the sleeping comfort can be greatly improved.

The movable floor 6a has one end and the other end in the longitudinal direction connected to the other ends of the first link 33 and the second link 34, respectively, and moves up and down by the ups and downs of these links 33, 34. . Therefore, even if the load applied to the one end side and the other end side in the longitudinal direction of the movable floor portion 6a is unbalanced, the movable floor portion 6a is vertically driven and inclined to a predetermined height without being inclined with respect to the longitudinal direction. Held in.

That is, since the movable floor portion 6a is restricted from inclining in the shoulder width direction intersecting the height direction of the user, when the user's waist is supported by the movable floor portion 6a, the user is restrained. It can be supported without tilting in the shoulder width direction.

Further, since the movable floor 6a moves up and down horizontally, when the movable floor 6a is raised and applied to the waist of the user or when the supporting state is released, the user's body is moved forward and backward or left and right. It hardly moves in the direction. for that reason,
Even users with limited physical movement can use it.

When the first link 31 and the second link 33 are driven up and down, the pressing body 21 provided on the rotary shaft 18 presses the third connecting shaft 35 that connects the midway portions of the links. I have to. That is, the links 31 and 33 are driven up and down by sliding the pressing body 21 and the third connecting shaft 35.

Therefore, even if the positional relationship between the pressing body 21 and the third connecting shaft 35 is slightly deviated due to an error in the lengths of the links 31 and 33, the rotating pressing body 21 causes The movable floor 6a by surely pressing the connecting shaft 35 of No. 3
Can be raised. That is, the links 31, 33
Since it is not required to assemble the rotating shaft 18 and the like with high precision, the manufacturing and assembling work of those parts becomes easy.

In the above embodiment, two pairs of the first link 31 and the second link 33, which make a pair, are provided on both sides of the fixed frame 12 of the drive mechanism 11 in the width direction. The movable floor 6a may be driven by a structure in which one first link 31 and one second link 33 are provided, for example, in the widthwise central portion of the frame 12.

[0043]

As described above, according to the first aspect of the present invention, the movable floor part of the floor board can be vertically moved in the horizontal state by the drive mechanism so as to be held at a predetermined height.
Therefore, since this movable floor can reliably support a part of the user's body, for example, by supporting the lower back, users with weakened muscles in the lower back, such as the sick and the elderly, etc. In the case of, it is possible to reduce the burden on the waist when sleeping.

In addition, since the movable floor moves up and down horizontally, when the movable floor is pressed against the user's body or the pressed state is released, the user's body is displaced in the front-rear direction or the left-right direction. Can be done without

Further, the movable floor is driven by sliding the sliding body which is rotated by the rotary shaft on the connecting shaft which connects the intermediate portions of the first link and the second link. Therefore, even if the positional relationship between the two is slightly deviated, the connecting shaft can be reliably pressed by the rotating sliding body.

Therefore, the assembly work of the slide body and the link provided with the connecting shaft is not required to be highly accurate, so that the assembling work can be facilitated. According to the second aspect of the invention, similarly to the first aspect, the movable member can be reliably driven up and down without requiring high assembly precision and manufacturing precision of the sliding body and the link provided with the connecting shaft. It is possible to provide a vertical drive device capable of performing the above.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a drive mechanism showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the longitudinal direction of the bed frame when the drive mechanism is also incorporated in the bed frame.

FIG. 3 is a sectional view of the drive mechanism, which is also in the width direction of the bed frame.

FIG. 4 is a perspective view of the bed apparatus.

FIG. 5 is a sectional view of the bed apparatus along the longitudinal direction.

[Explanation of symbols]

1 ... Bed frame 6 ... Floorboard 6a ... movable floor 11 ... Drive mechanism 12 ... Fixed frame 18 ... Rotation axis 21 ... Pressing body 22 ... Drive source 31 ... first link 33 ... third link 35 ... Third connecting shaft

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47C 19/04

Claims (2)

(57) [Claims] 1. A bed frame, a floor plate which is supported by the bed frame and which is formed on a movable floor part of which the longitudinal direction of the bed frame is divided in the width direction, and the movable plate. A vertical drive device which is arranged on the lower surface side of the floor part and which vertically drives the movable floor part in a substantially horizontal state and holds the movable floor part at a predetermined height with respect to the other part of the floor plate. The drive device has a fixed frame provided along the longitudinal direction in the width direction of the bed frame, and one end rotatably connected to both longitudinal ends of the fixed frame. A pair of links whose middle portions are rotatably connected by a connecting shaft and the other ends are rotatably connected to both longitudinal ends of the movable floor, respectively, and a middle portion of the fixed frame in the longitudinal direction. Along the width direction A rotary shaft rotatably supported, a drive source provided on the fixed frame for rotationally driving the rotary shaft, and a rotary shaft provided on the rotary shaft and rotated in a predetermined direction by the drive source. A bed apparatus comprising: a pressing body that presses the connecting shaft to rotate the pair of links in a fallen state in a standing direction by being pushed. 2. A vertical drive device for vertically driving a plate-shaped movable member, wherein a fixed frame and both ends of the fixed frame in the longitudinal direction are rotatably connected to each other. And a pair of links whose middle portions are rotatably connected by a connecting shaft and the other end is rotatably connected to both longitudinal ends of the movable member, and the longitudinal direction of the fixed frame. A rotary shaft that is rotatably supported in the middle in the width direction, a drive source that is provided on the fixed frame and rotationally drives the rotary shaft, and the rotary shaft is provided on the rotary shaft. A vertical drive device comprising: a pressing body that is rotated in a predetermined direction by a drive source to press the connecting shaft to rotate the pair of links in a lying state in a standing direction.