JP2004337224A - Bed apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bed apparatus which enables the vertical and the tilting movement of the floor part accurately with a simple structure. <P>SOLUTION: The apparatus includes a pair of rotary shafts 3 and 5 which is rotatably installed being separated at a specified interval with the axis thereof along the width-wise direction of a base frame 1, first links 8 for vertical movement, each one end of which is fixed to each of the rotary shafts, second links 9 for vertically movement, each one end of which is pivoted on each of the first links for vertical movement while the other end of which is pivoted on the floor part 10, a first drive source 17 which drives to rotate either one of the rotary shafts and a gas spring 21 which is made stretchable and transmits the rotation of one rotary shaft to the other rotary shaft to drive each pair of the first and second links synchronizing each other so that the floor part is moved up and down horizontally while being stretched or reduced to rotate either one of the rotary shafts, thereby causing the floor part to be tilted along the length direction thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bed device capable of vertically moving a floor on which a mattress is placed and tilting the floor along a longitudinal direction.
[0002]
[Prior art]
For example, in a hospital bed device, the height of the patient's supine floor is adjusted so that the patient's height can be adjusted to a level that facilitates examination and care when examining and caring for the patient. There are things that can be changed. At the same time, the floor can be tilted along the longitudinal direction so that the head of the user lying on the floor can be raised or the legs can be raised to facilitate the consultation and care. It is desired that In that case, it is required that the floor be provided so as to be vertically movable and tiltable with respect to the bed frame.
[0003]
Conventionally, when the floor can be moved up and down and tilted, the floor can be moved up and down and tilted by a completely different vertical movement mechanism and a tilting mechanism with respect to the base frame of the bed apparatus. I was
[0004]
That is, a vertically moving frame is provided on the base frame so as to be vertically movable by a vertically moving mechanism, and the floor portion is provided on the vertically movable frame so as to be tiltable along a longitudinal direction, and is tilted by the tilting mechanism. .
[0005]
[Problems to be solved by the invention]
However, if the vertically moving frame is provided on the base frame of the bed device so as to be vertically movable, and the floor is provided on this vertically movable frame so as to be tiltable by the tilting mechanism, the floor is vertically moved and tilted. Since a vertically moving frame is required, the number of parts may be increased and the configuration may be complicated.
[0006]
In addition, the vertical movement mechanism for vertically moving the vertical movement frame and the tilting mechanism for tilting the floor directed toward the vertical movement frame have completely different configurations, which also increases the number of parts. And the configuration was complicated.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a bed apparatus having a relatively simple configuration and capable of reliably moving the floor up and down and tilting.
[0008]
[Means for Solving the Problems]
The present invention relates to a bed device in which a floor is provided so as to be vertically movable and tiltable along a longitudinal direction.
A base frame,
A pair of rotating shafts that are provided rotatably at predetermined intervals in the longitudinal direction of the base frame along the width direction of the base frame,
A first up / down link having one end fixed to each rotating shaft;
A second vertical link having one end pivotally connected to the first vertical link and the other end pivotally connected to the floor;
A first drive source provided on the base frame and configured to rotationally drive one rotation shaft;
An expandable and contractible structure, one end of which is pivotally connected to the one rotation shaft and the other end of which is pivotally connected to the other rotation shaft, and which is driven by the first drive source. By transmitting the rotation to the other rotating shaft, the pair of first and second vertical links are driven synchronously to move the floor vertically up and down, and by expanding and contracting, to rotate one of the rotating shafts. And a second drive source for rotating the floor portion to tilt the floor portion along the longitudinal direction.
[0009]
An anti-sway link that restricts the floor from swinging in the longitudinal direction together with the second vertical link has one end pivotally connected to the base frame and the other end pivotally connected to one second vertical link. Preferably, it is provided.
[0010]
Preferably, the second drive source is a gas spring.
[0011]
According to the present invention, the height of the floor can be changed by rotating the pair of rotary shafts by the first drive source, and the floor can be tilted by rotating only one rotary shaft by the second drive source. Can be done.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a side view of a bed apparatus according to an embodiment of the present invention. The bed apparatus has a base frame 1. The base frame 1 is formed in a rectangular frame shape as shown in FIG. 2, and casters 2 with stoppers are provided on the lower surfaces of the four corners. Thereby, the base frame 1 is movable.
[0014]
A first rotating shaft 3 is rotatably supported and installed on a pair of first brackets 4 provided at both ends in the width direction of the base frame 1 at both ends in the longitudinal direction of the base frame 1. I have. At one end of the base frame 1 in the longitudinal direction, a second rotating shaft 5 is rotatably supported at both ends by a pair of second brackets 6 provided at both ends in the width direction of the base frame 1. It is erected.
[0015]
One end of a pair of first up / down links 8 is fixedly provided at both ends of the first rotating shaft 3 and the second rotating shaft 5, respectively. One end of a second vertical link 9 is pivotally connected to the other end of each first vertical link 8.
[0016]
The other ends of the four second up / down links 9 are respectively provided at both ends in the width direction on the lower surface of the floor portion 10 in the lengthwise middle part of the lower surface of the floor portion 10, and a pair of third ends provided at predetermined intervals in the longitudinal direction. Is pivotally attached to the bracket 11. In other words, the other ends of the pair of second up / down links 9 provided on the first rotating shaft 3 via the first up / down links 8 are pivotally connected to both widthwise ends of the lower surface of one end of the floor 10. The other end of a pair of second up / down links 9 provided on the second rotating shaft 5 via the first up / down link 8 is the opposite end in the width direction of the lower surface of the other end of the floor 10. Is pivoted to.
[0017]
The floor 10 has a rectangular frame 10a supporting a floor plate (not shown). A headboard body 12 is provided upright at one longitudinal end of the floor 10, and a footboard body 13 is provided upright at the other end. A mattress 14 is placed on the upper surface of the floor 10, and the patient lies on the mattress 14.
[0018]
A fourth bracket 16 is provided at an end of the base frame on the first rotation shaft 3 side. A first drive source 17 for vertical drive is pivotally attached to the fourth bracket 16. Although not shown in detail, the first drive source 17 has a drive shaft 18 that is driven forward and backward in the axial direction by the operation of a built-in motor. 3 is pivotally attached to the other end of a first transmission link 19 provided with one end fixed to the axial center.
[0019]
At the other end of the first transmission link 19, the end of a cylinder 22 of a gas spring 21 constituting a second drive source for tilting drive is pivotally mounted together with the tip of the drive shaft 18. A proximal end of a movable member 24 is connected to a distal end of a piston rod 23 protruding from a cylinder 22 of the gas spring 21. The distal end of the movable member 24 is pivotally connected to the other end of a second transmission link 26 having one end fixed to the axial center of the second rotary shaft 5.
[0020]
As shown in FIG. 2, a horizontal rail 27 is provided along the width direction at the center of the base frame in the longitudinal direction. Fifth brackets 28 are erected on the upper surfaces of both ends in the longitudinal direction of the horizontal rail 27, respectively. One end of a holding link 29 that is bent in a substantially U-shape is pivotally attached to the pair of fifth brackets 28, respectively. The other end of each holding link 29 is pivotally connected to a middle part of the second vertical link 9 via a connecting shaft 31.
[0021]
Next, an operation when the floor unit 10 of the bed device having the above configuration is moved up and down and tilted will be described.
[0022]
FIG. 1 shows a state where the floor 10 is lowered and is horizontal. When the floor 10 is in a horizontal state, the piston rod 23 of the gas spring 21 is in a neutral state among a forward state, a neutral state, and a retracted state.
[0023]
When the floor 10 is raised from this state as shown in FIG. 3, the first drive source 17 is operated and the drive shaft 18 is operated in the forward direction. When the drive shaft 18 moves forward, the first transmission link 19 is rotated clockwise as indicated by the arrow in FIG. 3, and the first rotation shaft 3 rotates in the same direction in conjunction with this rotation.
[0024]
When the first rotation shaft 3 rotates clockwise, this rotation is transmitted to the second rotation shaft 5 via the gas spring 21 and the second transmission link 26, and the second rotation shaft 5 also rotates clockwise. Rotate.
[0025]
When the first rotating shaft 3 and the second rotating shaft 5 rotate clockwise, the first vertical link 8 having one end fixed to each of the rotating shafts 3 and 5 rotates in conjunction therewith, and the other end rotates as shown in FIG. 1 rises to the position shown in FIG.
[0026]
When the other end of the first up / down link 8 rises, the second link 9 having one end pivotally connected to the other end rises in conjunction therewith. In other words, the angle formed by the first up-down link 8 and the second up-down link 9 becomes large and the second up-down link 9 rises, so that the other end of the four second links 9 The pivoted floor 10 will rise.
[0027]
A second up / down link 9 pivotally connected at one end to the first up / down link 8 and at the other end to a third bracket 11 provided on the lower surface of the floor 10 is rotatable. Therefore, there is a possibility that the floor 10 swings in the front-back direction.
[0028]
However, between the middle part of the pair of second vertical links 9 connected to the floor 10 and the fifth bracket 28 provided on the base frame 1, the holding ring 29 has one end and the other end respectively. It is pivoted and installed. This restricts one of the second vertical rings 9 from freely rotating with respect to the first vertical link 8, so that the floor 10 does not swing in the longitudinal direction.
[0029]
That is, the floor unit 10 does not swing in the longitudinal direction in any of the lowering state shown in FIG. 1 and the rising state shown in FIG. 3, so that it can be used in a stable state. .
[0030]
In order to tilt the floor 10 from the state as shown in FIG. 3 so as to lower the footboard body 13 side as shown in FIG. 4, the piston rod 23 of the gas spring 21 in the neutral state is attached to the cylinder 22. Driving in the retracting direction. When the piston rod 23 retreats, the movable member 24 and the second transmission link 26 interlock with the retraction, so that the second rotation shaft 5 causes the second rotation shaft 5 to move in the counterclockwise direction indicated by the arrow in FIG. Rotate.
[0031]
As a result, the other end of the first up / down link 8 having one end fixed to the second rotating shaft 5 descends, and the second up / down link 9 descends in conjunction with this descending. 10, the foot board 13 side is lowered.
[0032]
When the floor 10 is lowered on the footboard 12 side, the reaction force of the gas spring 21 is transmitted to the first rotating shaft 3 via the other end of the first transmission link 19 to which the cylinder 22 is connected.
[0033]
However, the drive shaft 18 of the first drive source 17 is connected to the other end of the first transmission link 19, and the drive shaft 18 does not advance or retreat in the axial direction. The rotation shaft 3 is prevented from rotating. Therefore, the headboard body 12 side of the floor 10 does not rise or fall, and the tilt angle of the floor 10 does not become unstable.
[0034]
When lowering the headboard 12 side as shown in FIG. 5 from the state in which the floor portion 10 shown in FIG. 3 rises horizontally, the piston rod 23 of the gas spring 21 in the neutral state as shown in FIG. , And is driven in the forward direction protruding from the cylinder 22. When the piston rod 23 is driven in the forward direction, the second transmission link 26 is interlocked with the movement via the movable member 24, and rotates clockwise as indicated by an arrow in FIG.
[0035]
When the second transmission link 26 rotates clockwise, the second rotation shaft 5 to which the second transmission link 26 is fixed is driven to rotate in the same direction as in FIG. The first vertical link 8 having one end fixed thereto rotates in conjunction with the rotation, and the other end rises.
[0036]
When the other end of the first up / down link 8 rises, the second up / down link 9 rises in conjunction with the rise, and the angle formed with the first up / down link 8 increases. The floor board 10 connected to the other end of the vertical link 9 moves upward on the foot board 13 side, and descends on the head board 12 side.
[0037]
Also at this time, the first rotary shaft 3 receiving the reaction force of the gas spring 21 is prevented from rotating by the first drive source 17, so that even if the piston rod 23 is driven forward, the first rotary shaft 3 is not rotated. 3 does not rotate. Therefore, even if the footboard 13 side of the floor 10 is raised, the headboard body 12 is not raised or lowered, and the tilt angle of the floor 10 does not become unstable.
[0038]
As described above, the floor 10 is provided on the first rotary shaft 3 and the second rotary shaft 5 provided on the base frame 1 via the first vertical link 8 and the second vertical link 9. By rotating the first rotating shaft 3 by the first drive source 17, the first and second vertical links 8.9 of the rotating shafts 3 and 5 are linked so that the floor 10 is moved. Can be driven up and down.
[0039]
An extendable gas spring 21 is provided between the first rotating shaft 3 and the second rotating shaft 5, and the second rotating shaft 5 is moved counterclockwise by extending and contracting the gas spring 21. Alternatively, the floor 10 can be tilted in a predetermined direction by selectively rotating it clockwise.
[0040]
Therefore, the floor portion 10 can be directly moved up and down and tilted by the first drive source 17 and the gas spring 21, so that there is no need to provide a vertical frame as in the conventional case, and the number of parts can be reduced accordingly. The configuration can be simplified.
[0041]
By providing the gas spring 21 between the first rotating shaft 3 and the second rotating shaft 5, the first and second vertical links 8, 9 that support the floor 10 so as to be vertically movable are used. Thus, the floor 10 can be tilted.
[0042]
That is, the first and second vertical links 8 and 9 and the gas spring 21 can also be used as components for both the vertical movement and the tilt movement of the floor 10. Therefore, the number of parts can be reduced and the configuration can be simplified accordingly.
[0043]
The present invention is not limited to the above-described embodiment. For example, a gas spring is used as the second drive source, but instead of the gas spring, the drive shaft is moved in the axial direction by a motor as in the case of the first drive source. The drive source may be provided between the first and second transmission links provided on the first rotation shaft and the second rotation shaft.
[0044]
In the above-described embodiment, the case where the floor is tilted while being raised as shown in FIG. 3 has been described. However, as shown in FIG. You may make it incline a part.
[0045]
【The invention's effect】
As described above, the present invention enables a pair of first and second vertical links to be operated by the first drive source to change the height of the floor, and one of the first and second links to be driven by the second drive source. By actuating the first and second links, the floor can be tilted.
[0046]
Therefore, unlike the related art, there is no need to provide a vertical frame exclusively for vertical movement on the base frame, so that the number of components can be reduced and the configuration can be simplified.
[Brief description of the drawings]
FIG. 1 is a front view of a bed device according to an embodiment of the present invention in which a floor portion is in a lowered state.
FIG. 2 is a plan view of the bed device from which a floor is removed.
FIG. 3 is a front view of the bed device with the floor raised.
FIG. 4 is a front view of the bed device in which the floor is tilted so that the footboard body side is lowered.
FIG. 5 is a front view of the bed device in which the floor is tilted so that the headboard body side is lowered.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bed frame, 8 ... 1st up / down link, 9 ... 2nd up / down link, 10 ... Floor part, 14 ... Mattress, 17 ... 1st drive source, 18 ... Drive shaft, 19 ... 1st Transmission link, 21: gas spring (second drive source), 22: cylinder, 23: piston rod, 26: second transmission link, 29: holding link.

Claims (3)

In a bed device in which a floor portion is provided so as to be vertically movable and tiltable along a longitudinal direction,
A base frame,
A pair of rotating shafts that are provided rotatably at predetermined intervals in the longitudinal direction of the base frame along the width direction of the base frame,
A first up / down link having one end fixed to each rotating shaft;
A second vertical link having one end pivotally connected to the first vertical link and the other end pivotally connected to the floor;
A first drive source provided on the base frame and configured to rotationally drive one rotation shaft;
An expandable and contractible structure, one end of which is pivotally connected to the one rotation shaft and the other end of which is pivotally connected to the other rotation shaft, and which is driven by the first drive source. By transmitting the rotation to the other rotating shaft, the pair of first and second vertical links are driven synchronously to move the floor vertically up and down, and by expanding and contracting, to rotate one of the rotating shafts. And a second drive source that rotates the floor section in a longitudinal direction by rotating the bed section. An anti-sway link that restricts the floor from swinging in the longitudinal direction together with the second vertical link has one end pivotally connected to the base frame and the other end pivotally connected to one second vertical link. The bed device according to claim 1, wherein the bed device is provided. 2. The bed apparatus according to claim 1, wherein the second drive source is a gas spring.

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