JPH057010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lifting mechanism for a bed floor plate, and particularly to a lifting mechanism driven by a crank handle.

(Prior art) In a bed in which the floor plate is raised and lowered by raising and lowering, the back floor plate, lumbar floor plate, and foot floor plate are connected in a bendable manner, and the back floor plate is connected to the lumbar floor plate from the point where it connects to the lumbar floor plate toward the head side. There is a bed configured such that the bed frame is rotatably supported at a position separated by an appropriate distance, and the lumbar floor plate and the foot floor plate are supported on the bed frame so as to be movable in the longitudinal direction of the bed frame. This has the advantage that the force required to raise and lower the floorboard can be reduced. (For example, see Japanese Utility Model Publication No. 59-6826.) In such a bed, a push-up arm is provided under the back floor plate, and the push-up arm is moved by, for example, a moving member of a screw shaft drive device to rotate the floor board. Conventionally, the screw shaft is supported in the longitudinal direction of the bed frame due to the driving direction of the upper arm. A crank handle for driving the rotation is provided on the footboard side. However, depending on the conditions of the hospital room where the bed is installed, it may be preferable to allow the crank handle to be driven from the side. For this reason, conventionally in such cases, the screw shaft is supported in the longitudinal direction of the bed frame, but the crank handle is provided on the side, and a transmission mechanism using gears, chains, etc. is installed between the crank handle and the screw shaft. Connected through.

(Problems to be Solved by the Invention) In such a mechanism, there is a problem that the transmission mechanism makes the mechanism as a whole large-scale, the efficiency deteriorates, the required force increases, and the cost tends to increase.

The present invention aims to solve this problem.

(Means for Solving the Problems) The configuration of the present invention for solving the above problems will be explained with reference to FIGS. 1 to 4 showing embodiments. , the back floor plate 1a, the main part floor plate 1b, and the foot floor plate 1c are connected in a bendable manner, and the back floor plate 1a is connected to the waist floor plate 1b.
The bed frame 3 rotatably supports a position 2c at an appropriate distance away from the connection point 2a toward the head, and the lumbar floor plate 1b and foot floor plate 1c are movable in the longitudinal direction of the bed frame 3. A push-up arm 4 is provided on the lower side of the back floor plate 1a, and a screw shaft 5 is rotatably supported in the width direction of the bed frame 3. At the same time,
An operating shaft 7 is provided on the bed frame 3 adjacent to the screw shaft 5 so as to be rotatable around a vertical axis,
A pair of direction conversion links 8 and 9 are provided protruding in the lateral direction of the operating shaft 7, and the direction conversion link 8 on one side is connected to the operation pin 11 of the moving member 6 via a long groove 10, and the direction conversion link 8 on one side is connected to the operation pin 11 of the moving member 6 through a long groove 10. spherical bearing portions 12 provided at both ends between the direction conversion link and the push-up arm 4;
A drive link 13 is connected thereto, and a crank handle 14 is fixed to the end of the screw shaft 5.

In the above configuration, the crank handle 14
can be fixed not only to one side of the screw shaft 5, but also to both ends. Furthermore, the grip portion 15 of the crank handle 14 can be made foldable.

(Operation and Examples) Figures 1 to 4 show examples of the operation of the present invention.
This will be explained with reference to the figures. First, when the back floor plate 1a and other floor plates are supported horizontally, when the crank handle 14 is rotated in a predetermined direction to rotate the screw shaft 5, the moving member 6 moves along the screw shaft 5. Since it moves upward in FIG. 4A, the direction changing link 8 on one side is driven by the long groove 10 portion by the operating pin 11 and rotates in the width direction of the bed frame 3. The rotation of the direction changing link 8 on one side causes the operating shaft 7 to rotate counterclockwise, and the direction changing link 9 on the other side rotates.
rotates in the longitudinal direction of the bed frame 3. Due to this rotation of the other side direction changing link 9, the drive link 13 is driven to the left, and the drive link 1
3, the upper arm 4 moves to the left. Therefore, the back floor plate 1a rotates clockwise around the fulcrum 2c supported by the bed frame 3 and rises. Furthermore, by rotating the crank handle 14 in the opposite direction, the back floor plate 1a can be lowered by performing the reverse operation. In the above operation, the direction conversion link 9 on the other side has a vertical axis,
In addition, the upper arm 4 rotates around the horizontal axis, and the drive link 13 connected between them is
Since the spherical bearings 12 are provided at both ends, the driving force can be transmitted without any problem.

When the back floor plate 1a rotates upward as described above, the connection point with the lumbar floor plate 1b rotates down around the fulcrum, and the connection point of the lumbar floor plate 1b moves toward the head of the bed. It then descends and becomes inclined. In this way, the crank handle 14
As the back floor plate 1a rotates and rises due to the drive of the user, the lumbar floor plate 1b tilts, so that these parts rise and fall like a chair, allowing the user to take a comfortable posture. In this operation, the rotation fulcrum 2c of the back floor plate 1a is set at a position an appropriate distance away from the connection point 2a with the lumbar floor plate 1b toward the head, as described above.
The weight of the user's waist that is applied around point a acts in the direction of rotating and lifting the back floor plate 1a, thereby reducing the force required to make the above-described undulations.

As described above, by rotating the crank handle 14 fixed to the end of the screw shaft 5 and provided on the side surface of the bed frame 3, the back floor plate 1a is rotated and raised. The waist floor plate 1b can be tilted. Since the crank handle 14 is fixed to the end of the screw shaft 5, no special transmission mechanism is required. Therefore, the crank handle 14 can be easily fixed not only to one side of the screw shaft 5, but also to both ends. Even if the crank handle 14 is provided on the side surface of the bed frame 3 in this way, by setting its position in the space below the floorboard, or by making the grip part 15 foldable, etc., it is possible to easily get on and off the bed frame 3. It will not be a hindrance.

(Example) Next, the example shown in the figure will be described. In this example, the lumbar floor plate 1b is attached to the bed frame 3.
The bed frame 3 is supported so as to be movable in the longitudinal direction by a floating support arm 16 rotatably supported on the bed frame 3. ,1
When b and 1c are in a horizontal state, the connection point 2e on the waist floor plate 1b side is located closer to the back floor plate 1a. The foot floor plate 1c is supported at its distal end so as to be movable along the bed frame 3 by a moving mechanism consisting of rollers 17 and a guide frame 18.

In this configuration, when the back floor plate 1a rotates upward and the connection point 2a is pulled toward the head of the bed, the floating support arm 16 rotates counterclockwise about the connection point 2d as a fulcrum, and the As mentioned above, the lumbar floor plate 1b descends while moving toward the head side and becomes inclined, and the foot floor plate 1c connected to the lumbar floor plate 1b is inclined with the lumbar floor plate 1b side raised. At this time, the floating support arm 16 configured as described above
Since the connecting portion 2e gradually rises due to the rotation, the lumbar floor plate 1b has a larger inclination angle than when the connecting portion 2a only moves downward. However, the inclination angle of the waist floor plate 1b is
It can also be increased by increasing the distance between a and 2c to increase the downward movement of the connecting point 2a, and therefore the above-described configuration of the floating support arm 16 is not essential. Therefore, as long as the lumbar floor plate 1b is longitudinally movable and tiltable, it can be supported appropriately, such as by the support mechanism disclosed in the above-mentioned Japanese Utility Model Publication No. 59-6826.

In the illustrated embodiment, the screw shaft 5 is connected to the bed frame 3 by bearings 17 at both ends.
The actuating shaft 7 is supported on the bed frame 3 adjacent to these screw shafts 5, and although the specific structure of these supporting parts is not shown in the drawings, appropriate support is provided. Of course, a mechanism can be applied. Further, the crank handle 14 has a wheel-like structure, and a grip portion 15 is provided on the outside thereof so as to be bendable, and a storage groove 18 is provided for storing the grip portion 15 when bent. Further, FIG. 2b shows an example of the drive link 13, and as described above, the spherical bearing portions 12 are provided at both ends. This spherical bearing part 12 includes an inner member 20 provided with a connecting shaft 19 and a drive link 1.
3 an outer member 21 connected to the main body,
The inner member 20 is configured to be rotatable relative to the outer member 21 so that the connecting shafts 19 provided thereon are oriented in directions perpendicular to each other.

(Effects of the Invention) As described above, the present invention connects the back floor plate, main part floor plate, and foot floor plate in a bendable manner, and positions the back floor plate at a position an appropriate distance away from the connection point with the lumbar floor plate toward the head side. The lumbar floor plate and the foot floor plate are rotatably supported on the bed frame, and the lumbar floor plate and the foot floor plate are supported on the bed frame so as to be movable in the longitudinal direction thereof, thereby reducing the force required to rotate and raise the back floor plate. In the constructed bed, a push-up arm is provided on the lower side of the back floor plate which is rotatably supported on the bed frame, and a pair of direction-changing links provided on the operating shaft are provided between the movable members moved by the screw shaft. Since a drive link with spherical bearings provided at both ends is interposed, the screw shaft can be supported in the width direction of the bed frame.Therefore, by fixing the crank handle to the end of the screw shaft, Since it can be easily installed on the side of the bed frame and does not require a transmission mechanism using gears or chains, the crank handle can be fixed not only to one side of the screw shaft, but also to both ends. In addition, since the efficiency is not deteriorated, the operating force is not increased and the cost can be reduced. Furthermore, even if the crank handle is installed on the side of the bed frame in this way, by setting the crank handle in the space below the floorboard, or by making the grip part foldable, it may become difficult to get on and off the floorboard. It has the effect of not being

[Brief explanation of drawings]

All figures show embodiments of the present invention; FIG. 1 is an overall schematic explanatory perspective view, FIGS. 2 a and b are explanatory perspective views of main parts, and FIGS. 3 a, b, and 4 are perspective views. a,
b shows the configuration as well as the operation, in which a is an explanatory side view and b is an explanatory plan view. Code 1a...Back floorboard, 1b...Waist floorboard, 1
c... Foot floor plate, 2a, 2b, 2c, 2d, 2
e...Connection point, 3...Bed frame, 4...
pushing upper arm, 5... screw shaft, 6... moving member,
7... Operating axis, 8, 9... Direction conversion link, 10
... Long groove, 11 ... Operating pin, 12 ... Spherical bearing section, 13 ... Drive link, 14 ... Crank handle, 15 ... Grip section, 16 ... Idle support arm, 17 ... Bearing, 18 ... Storage groove, 19... Connection shaft, 20... Inner member, 22... Outer member.

Claims (1)

[Scope of Claims] 1. A back floor plate, a main part floor plate, and a foot floor plate are connected to each other in a bendable manner, and the back floor plate is rotated to the bed frame at a position an appropriate distance away from the connection point with the lumbar floor plate toward the head side. The lumbar floor plate and the foot floor plate are supported on the bed frame so as to be movable in the longitudinal direction thereof, and a push-up arm is provided on the lower side of the back floor plate, and a screw shaft is provided in the width direction of the bed frame. rotatably supporting the movable member, and screwing the female threaded portion of the moving member onto the threaded shaft,
An operating shaft is provided on the bed frame adjacent to the screw shaft so as to be rotatable around a vertical axis, and a pair of direction changing links are provided protruding in the lateral direction of the operating shaft, and a direction changing link on one side is provided. A link is connected to the operating pin of the moving member through a long groove, and a driving link is connected between the direction conversion link on the other side and the push-up arm through spherical bearings provided at both ends, and the screw shaft A mechanism for raising and lowering bed floorboards, characterized by a crank handle fixed to the end of the bed. 2. The elevating mechanism for a bed floor plate, characterized in that the crank handle described in item 1 is fixed to both ends of a screw shaft. 3. The crank handle described in item 2 is a mechanism for raising and lowering a bed floor plate, characterized in that the grip portion is foldable.