JP2003010007A - Bed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bed device reducing burdens put on an elevating/lowering link constituting a vertical driving device in the case of driving a movable floor part in a vertical direction in the bed device of a large width dimension. SOLUTION: The bed device is provided with the vertical driving device 11 driving the movable floor part 6a in the vertical direction in an almost horizontal state and the movable floor part is held at a prescribed height by the vertical driving device. The vertical driving device is provided with a first rotary shaft 15 and a second rotary shaft 16 supported at both end parts in a longitudinal direction of a fixed frame 12 respectively turnably along the width direction, a first link 17 whose middle part is fixed to the first rotary shaft, a second link 18 whose one end is fixed to the second rotary shaft to be turned in linkage with the first link and a first elevating/lowering link 25 and a second elevating/lowering link 26 whose one end is fixed to the first and second rotary shafts respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed device in which a part of a floor plate is vertically movable.

[0002]

2. Description of the Related Art When a user lies on a bed apparatus, the back and the buttocks of the user are projected and the waist is constricted.
Therefore, it is said that the weight ratio applied to the mattress is greater 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 under 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 position with less curvature of the spine. .

However, when the user lies on a relatively hard mattress in which the back and buttocks are less depressed, the upper surface of the mattress is kept substantially flat, so that the back and buttocks protruding to the back of the user are kept. It is difficult for the waist located between and to 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 user's lumbar spine may be burdened, and the comfort of sleeping may be reduced.

Particularly, in the case of a user whose muscular strength in the lower back is weak such as a sick person or an old person, not only the burden on the lower back may increase, but also in the case of a healthy user Depending on the situation, the burden may increase. Therefore, the applicant of the present application has proposed that a bed provided with a movable floor portion that drives a position corresponding to the waist portion of the mattress upward and holds it at a predetermined height in order to securely support the waist portion that curves upward. The device is Japanese Patent Application No. 8-135253.
No. proposed by No. In this prior art, a part of the floor plate of the bed frame is a movable floor, and the movable floor is moved up and down by a vertical drive device. The drive device is
A fixed frame formed to have a length dimension substantially the same as the width dimension of the bed frame, and one end rotatably connected to the fixed frame, and the middle portions thereof are rotatably connected by a connecting shaft, and the other end. A pair of undulating links, each of which is rotatably connected to both longitudinal ends of the movable floor and movably along the longitudinal direction, and has a length dimension substantially equal to that of the fixed frame; It has a drive device that drives the link up and down. Therefore, by driving the pair of undulating links in the upright direction from the laid state, the movable floor portion connected to the undulating links can be raised.

[0008]

However, in the vertical driving device having the above-described structure, the undulating link must have a length dimension substantially the same as the width dimension of the fixed frame, that is, a width dimension substantially the same as the width dimension of the bed frame. . Therefore, for example, when applied to a bed apparatus having a large width dimension such as a double bed, the length dimension of the undulating link becomes longer according to the width dimension of the bed apparatus, and hence the bending moment applied to the undulating link may become large. It was

It is an object of the present invention to provide a bed apparatus in which a large bending moment is not applied to an undulating link for vertically moving a movable floor portion of a vertical drive device.

[0010]

According to the present invention, there is provided a bed frame and a movable floor portion supported by the bed frame and having a part in the longitudinal direction of the bed frame divided in the width direction. A formed floor plate and a vertical drive that is arranged on the lower surface side of the movable floor and vertically drives the movable floor in a substantially horizontal state and holds the movable floor at a predetermined height with respect to other parts of the floor. The vertical drive device comprises a fixed frame provided along the longitudinal direction in the width direction of the bed frame, and one end portion in the longitudinal direction of the fixed frame along the width direction of the fixed frame. A first rotation shaft rotatably supported; a second rotation shaft rotatably supported at the other longitudinal end of the fixed frame along the width direction of the fixed frame;
A first link having a midway portion fixed to the rotary shaft of the second link, a second link having one end fixed to the second rotary shaft, one end of the first link and the other end of the second link Has an interlocking member whose one end and the other end are rotatably connected, and a drive shaft that is driven to move back and forth in the axial direction. A drive unit whose part is rotatably connected to the other end of the first link; and one end fixed to both ends of the first rotary shaft and the second rotary shaft, and the other end A bed apparatus comprising: an undulating link connected to both ends of a movable floor in the width direction so as to be movable in the longitudinal direction.

According to a second aspect of the present invention, one end is rotatably connected to at least one longitudinal center portion of the undulating link, and the other end is rotatably connected to the movable floor portion. The bed apparatus according to claim 1, further comprising a connecting link whose size is set to approximately half of the undulating link.

According to the present invention, one end of the undulating link is fixed to each of the first rotating shaft that is driven to rotate and the second rotating shaft that rotates in conjunction with the first rotating shaft. Since the first and second rotary shafts are rotated to raise and lower the undulating link from the laid-down state to move the movable floor up and down, the length of the undulating link is about the same as the lift of the movable floor. It can be shortened.

[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. 2 and 3 comprises a bed frame 1. The bed frame 1 is formed in a rectangular frame shape in plan view by connecting the widthwise both ends of a headboard 2 and a footboard 3 which are arranged in parallel and spaced apart from each other, by side plates 4. . Receiving bars 5 are fixed to the inner surfaces of the pair of side plates 4 along the longitudinal direction, and a floor plate 6 is installed on these receiving bars 5. The floor plate 6 is divided into four parts in the longitudinal direction, one of which is located at the substantially central part in the longitudinal direction, and a driving device 11 described later.
Movable floor 6 driven vertically by the horizontal
a (movable member), and the other floor portion is a fixed floor portion 6b detachably mounted on the bed frame 1.

A pair of U-shaped guide members 7 are fixed to both ends of the lower surface of the movable floor 6a in the width direction along the longitudinal direction with their opening surfaces 8 facing each other. The first reinforcing member 9 and the second reinforcing member 9 are arranged at positions slightly closer to the center than both ends in the longitudinal direction of the pair of guide members 7 along the width direction.
The reinforcing member 10 is provided.

The drive unit 11 has a fixed frame 12 as shown in FIGS. This fixed frame 1
2 is formed in a rectangular frame shape having a plane shape substantially the same as that of the movable floor 6a, and legs 13 are provided at four corners of the fixed frame 12, respectively. An adjuster 14 is provided at the lower end of the leg 13 so that the height of the fixed frame 12 can be adjusted.

First and second ends of the fixed frame 12 in the longitudinal direction are provided along the width direction of the fixed frame 12.
The rotary shaft 15 and the second rotary shaft 16 are rotatably supported.

A first link 17 is provided midway in the axial direction of the first rotating shaft 15. This first link 1
As shown in FIG. 1, a pair of strip-plate-shaped first portions 17a, one end of which is fixed to the first rotating shaft 15 and are provided in parallel at a predetermined interval, and the first rotating shaft 15 are provided. In addition, the first portion 17a includes a pair of band-plate-shaped second portions 17b which are fixed in parallel with each other at a predetermined interval at positions shifted by about 180 degrees in the circumferential direction.

The first portion 17a and the second portion 17b
And are provided with a predetermined dimension shift with respect to the axial direction, as shown in FIG.

The first link 17 is not divided into the first portion 17a and the second portion 17b, and the middle portion of the pair of long strips is provided at the shaft of the first rotating shaft 15. It may be fixed to a midway portion of the direction.

A second link 18 consisting of a pair of strips arranged in parallel at a predetermined interval is provided with one end fixed to the axially intermediate portion of the second rotary shaft 16.

The other end of the first portion 17a, that is, the first
A tubular interlocking member 19 is rotatably connected to one end of the link 17 and the other end of the second link 18, respectively.

A rectangular mounting plate 20 is fixed to a middle portion of the interlocking member 19 so as to project upward, and a driving device 21 is provided at a corner of the projecting portion on one end side in the longitudinal direction of the fixed frame 12. Are rotatably connected. The drive unit 21 includes a drive unit 22 pivotally mounted on the mounting plate 20, a drive shaft guide unit 23 integrally provided on the drive unit 22, and the drive unit 22 provided on the drive shaft guide unit 23. And a drive shaft 24 that is driven forward and backward in the axial direction. The drive unit 22 has a speed reducer (not shown), and drives the drive shaft 24 via the speed reducer. A tip portion of the drive shaft 24 protruding from the drive shaft guide portion 23 is rotatably connected to the other end of the first link 17, that is, the other end of the second portion 17b.

The first rotary shaft 15 and the second rotary shaft 16 have a first undulating link 25 and a second undulating link 25, respectively.
The undulating link 26 is provided. That is, as shown in FIGS. 1 and 4, the first undulating link 25 has
Of the rotary shaft 15 is made up of a strip-shaped first member 25a and a second member 25b which are fixed in parallel to each other at one end thereof, and the second undulating link 26 has the second undulating link 26. Band plate-shaped third member 26a and fourth member which are fixed in parallel to both ends of the rotary shaft 16 and are provided in parallel.
Member 26b. The first undulating link 2
A first lift shaft 27 and a second lift shaft 28 are provided at the other ends of the fifth undulating link 26 and the second undulating link 26, with both ends fixed to the above members. The first and second lift shafts 27 and 28 are slightly shorter than the width of the movable floor 6a, and a first roller 29 and a second roller 30 are rotatably provided at both ends thereof.

The first and second rollers 29 and 30 are shown in FIG.
, The first and second roller portions 29a, 29a,
30a and flanges 29b, 30b integrally formed at one end of each roller 29a, 30a and having a diameter larger than that of each roller 29a, 30a. Each roller 29, 30
Is rotatably attached to the small-diameter connecting shaft portions 27b and 28b protruding from both ends of the lift shafts 27 and 28 by a bearing (not shown). And each roller unit 2
The rollers 9a and 30a are engaged with the guides 7 of the rollers 29a and 30a. That is, the first and second rollers 29 and 30 are rotatably engaged with the guide member 7.

The first and second lift shafts 27, 2 are
Although rollers 29 and 30 are provided at both ends of 8, the ends of the shafts 27 and 28 may be directly engaged with the guide member 7 without providing rollers.

Fourth constituting the second undulating link 26
One end of a connecting link 32 is rotatably connected to the central portion of the member 26b in the longitudinal direction. The other end of the connecting link 32 is rotatably connected to a connecting member 31 provided at a midway portion of the second reinforcing member 10.

The connecting link 32 prevents the movable floor 6a from freely sliding in the longitudinal direction with respect to the first and second lift shafts 27 and 28. In addition, connection link 3
2 is half the length of the fourth member 26b,
One end is connected to the central portion in the length direction of the fourth member 26b. Therefore, when the first and second up-and-down links 25 and 26 rotate in the upright direction, the movable floor portion 6a rises straight up without moving in the longitudinal direction.

The connecting link 32 is made up of the above-mentioned members 25.
It may be provided by connecting to at least one of a, 25b, 26a, and 26b.

Next, the operation of using the bed apparatus having the above structure will be described.

First, the movable floor 6a and the drive unit 11 are installed so as to be a portion that the user wants to lift up when the user is supine, and the fixed floor 6b constituting the floor plate 6 other than the movable floor 6a is installed. Is installed on the receiving rail 5. And
Legs 13 of the drive device 11 for moving the movable floor 6a up and down.
The height of the fixed frame 12 is adjusted so that the movable floor 6a is at the same height as the fixed floor 6b when the movable floor 6a is lowered by the adjuster 14 provided in the. When the bed apparatus is properly installed, the mattress M shown by the chain line in FIGS. 2 and 3 is placed on the floor plate 6.

In order to raise the movable floor 6a to a predetermined height, first, the drive shaft 24 is moved to the drive shaft guide 23.
Drive in the direction that projects from. As a result, the second portion 17b rotatably connected to the tip of the drive shaft 24, that is, the first link 17, rotates in the counterclockwise direction shown by the arrow in FIG. When the first link 17 rotates, the first rotating shaft 15 interlocks with this rotation, so that the interlocking member 19 whose one end is pivotally attached to the first portion 17a of the first link 17 moves in the arrow direction. Moving. When the interlocking member 19 moves in the arrow direction, the second link 18 pivotally attached to the other end rotates in the counterclockwise direction indicated by the arrow. By this rotation, the second rotary shaft 16 to which one end of the second link 18 is fixed also rotates in the same direction.

The first and second undulating links 25, 26 described above.
Has one end fixed to the first and second rotating shafts 15 and 16, and therefore stands up from the lying state as the first and second rotating shafts 15 and 16 rotate counterclockwise. Will rotate in the direction. And each undulating link 25, 26
The first and second lift shafts 27 and 28 fixed to the other ends of the undulating links 25 and 26 are driven upward by the upright movement of the undulation links 25 and 26, so that they are interlocked with the first and second lift shafts 27 and 28. As a result, the movable floor 6a rises as shown by the chain line in FIG. At this time, the first roller 29 rolls in the guide member 7 provided on the lower surface of the movable floor portion 6a toward one end portion in the longitudinal direction of the fixed frame 12 to move the first roller 29.
Roller 30 rolls toward the central portion of the fixed frame 12 in the longitudinal direction.

That is, the movable floor 6a rises when the first and second undulating links 25 and 26 rotate in the upright direction at both longitudinal ends of the fixed frame 12. Therefore, the length dimension of the first and second undulating links 25, 26 may be approximately the same as the lift dimension of the movable floor portion 6a. That is, the first and second undulating links 25 and 26 are attached to the fixed frame 1
The length can be made sufficiently shorter than in the conventional case in which the length is substantially the same as the length. Therefore, the movable floor 6
Even if a load is applied to the movable floor portion 6a while a is raised, the bending moment generated in the undulating links 25 and 26 can be greatly reduced. Therefore, the durability of the drive device 21 can be improved accordingly. The drive device 21 has a speed reducer. Therefore, even if the weight of the user is added to the movable floor 6a that has been raised while the drive device 21 is stopped, the height of the movable floor 6a is maintained.

One end of the connecting link 32 is rotatably connected to the central portion of the fourth member 26b of the second undulating link 26, and the other end is rotatably connected to the second reinforcing member 10. Connected to. The length dimension of the connecting link 32 is set to half the length dimension of the fourth member 26b. Therefore, the movable floor portion 6a is restricted from moving in the longitudinal direction of the fixed frame 12, and does not move in the longitudinal direction at the time of ascending or descending but shifts right above and right below. Therefore, the movable floor 6a moves up and down without rubbing the portion of the user's body located on the movable floor 6a.

The drive section 22 is provided on the interlocking member 19. Therefore, when the drive shaft 24 is driven back and forth, a reaction force is generated in the interlocking member 19. Therefore, the driving force of the driving device 21 can be effectively used, and the driving device 21 can be downsized.

[0037]

According to the present invention, even in a bed apparatus having a large width, the undulating link for driving the movable floor can be made shorter than in the conventional case, so that the bending moment applied to the undulating link can be reduced. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a vertical drive device of a bed apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a bed apparatus.

FIG. 3 is a side sectional view of the bed apparatus.

FIG. 4 is a plan view of a vertical drive device.

FIG. 5 is a side sectional view of the vertical drive unit.

FIG. 6 is a sectional view showing the structure of a roller.

[Explanation of symbols]

6a ... movable floor 7 ... Guide member 11 ... Vertical drive device 12 ... Fixed frame 15 ... First rotary shaft 16 ... Second rotary shaft 17 ... 1st link 17a ... the first part 17b ... the second part 18 ... second link 21 ... Drive device 24 ... Drive shaft 25 ... 1st relief link 26 ... Second undulating link 27 ... First lift shaft 28 ... Second lift shaft

Claims (2)

[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 floor part of the movable floor part. A vertical drive device which is arranged on the lower surface side 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. A fixed frame provided along the longitudinal direction in the width direction of the bed frame, and a first rotation rotatably supported at one longitudinal end of the fixed frame along the width direction of the fixed frame. A shaft, a second rotating shaft rotatably supported at the other end of the fixed frame in the longitudinal direction along the width direction of the fixed frame, and a first intermediate shaft fixed to the first rotating shaft. 1 link, A second link having one end fixed to the second rotation shaft, and an interlocking member having one end and the other end rotatably connected to one end of the first link and the other end of the second link, respectively. And a drive shaft that is driven to move back and forth in the axial direction, is rotatably provided in the middle of the interlocking member, and the tip end of the drive shaft is rotatably connected to the other end of the first link. And one end of each of the first rotating shaft and the second rotating shaft is fixed to the other end, and the other end is movable in the widthwise both ends of the movable floor along the longitudinal direction. A bed device comprising: an undulating link connected to the. 2. One end of the undulating link is rotatably connected to at least one longitudinal center part, and the other end is rotatably connected to the movable floor part, and the undulating link has a length dimension. 2. The bed apparatus according to claim 1, further comprising a connecting link set to approximately half of the above.