JPH03121015A - Elevating mechanism for bed bottom plate - Google Patents

Abstract

PURPOSE:To eliminate the necessity of provision of a transmission mechanism using gears, chains and the like by providing a push-up arm disposed below a back section bottom plate which is rotatably supported to a bed frame, a pair of direction changing links provided on an actuating shaft between movable members which can be moved by a screw shaft, and a drive link provided at its both ends with spherical bearing parts. CONSTITUTION:A back section bottom plate 1a is rotatably supported to a bed frame 3 so that the part between a position 2a at which it is connected to a waist part bottom plate 1b and a position 2c on the head side can be rotated. Further, the waist part bottom plate 1b and a leg part bottom plate 1c are supported to the bed frame 3, movably in the longitudinal direction thereof. A push-up arm 4 is disposed below the back part bottom plate 1a, and a screw shaft 5 is rotatably disposed in the axial direction of the bed frame 3, which is screwed into a female thread part of a movable member 6. A pair of direction changing links 8, 9 are provided laterally of an actuating shaft 7 laid adjacent to the screw shaft 5, and are connected to an actuating pin 11 on the movable member 6 by way of an elongated groove 10, and a drive link 13 is connected between the direction changing link 9 and the push-up arm 4 by way of spherical bearing parts 12 provided at both ends of the drive link 13.

Description

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

(Prior art) In a bed in which the floor plate is raised and lowered by raising and lowering,
The back floor plate, the lumbar floor plate, and the foot floor plate are connected in a bendable manner, and the back floor plate is rotatably supported on the bed frame at an appropriate distance away from the connection point with the lumbar floor plate toward the head, and There is a bed in which the floor plate and the foot floor plate are supported by a bed frame so as to be movable in the longitudinal direction of the bed frame, and such a bed has the advantage that the force required for raising and lowering the floor plate can be reduced.

(For example, see Japanese Utility Model Publication No. 59-6826.) In such a bed, a push-up arm is provided below the back floor plate, and the push-up arm is moved by, for example, a moving member of a screw shaft type 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 inter-rotation movement is provided on the foot 1-board 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. Conventionally, in such cases, the screw shaft is supported in the longitudinal direction of the bed frame, but a 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. , back floor plate 1a, waist floor plate 1b
In addition, the foot floor plates IC are connected to each other in a bendable manner, and the back floor plate 1a is rotatably supported on the bed frame 3 at a position 2c that is an appropriate distance forward from the connection point 2a to the lumbar floor plate 1b toward the head side. The lumbar floor plate 1b and the foot floor plate IC are supported on the bed frame 3 so as to be movable in the longitudinal direction thereof, and a push-up arm 4 is provided on the lower side of the back floor plate 1a,
A screw shaft 5 is rotatably supported in the width direction of the bed frame 3, and a female screw portion of a moving member 6 is screwed onto the screw shaft 5. The operating shaft 7 is rotatable around the shaft.
A pair of direction changing links 8° 9 are provided in a protruding manner in the lateral direction of the operating shaft 7, and one direction changing link 8 is connected to the operating pin 11 of the moving member 6 via a long groove 10. , a drive link 13 is connected between the other direction changing link and the pusher arm 4 via spherical bearings 12 provided at both ends, and a crank handle 14 is fixed to the end of the screw shaft 5. It is.

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 folded freely.

(Operation and Examples) The operation of the present invention will be explained with reference to FIGS. 1 to 4 showing examples. First, in a state where the back floorboard 1a and other floorboards are supported in a horizontal state.

When the crank handle 14 is rotated in a predetermined direction to rotate the screw shaft 5, the moving member 6 moves upward in FIG. 4(a) along the screw shaft 5, so that the direction changing link 8 on one side is rotated in the width direction of the bed frame 3 by being driven by the long groove 1o portion by the operating pin 11.

Due to the rotation of the direction changing link 8 on one side, the operating shaft 7
is rotated counterclockwise, and the direction changing link 9 on the other side is rotated in the longitudinal direction of the bed frame 3. Due to this rotation of the direction changing link 9 on the other side, the drive link 13
is driven to the left, and pushed by the drive link 13, 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. In addition, the crank handle 14
In the above operations, the direction changing link 9 on the other side is on the vertical axis, and the push-up arm 4 is on the horizontal axis. The drive links 13 connected between these have spherical bearings 12 at both ends.
Since this is provided, the sleeping force can be transmitted without any problem.

When the back floor plate 1a rotates and rises as described above, the lumbar floor plate 1
The connecting point of the lumbar floor plate 1b rotates downward around the fulcrum, and as a result, the connecting point of the lumbar floor plate 1b moves toward the head of the bed and descends, becoming inclined. In this way, as the back floor plate 1a rotates and rises due to the drive of the crank handle 14, the lumbar floor plate 1b tilts, and these parts rise and fall like a chair, giving the user a comfortable posture. be able to. In such a movement, the back floor plate 1
As mentioned above, the rotation fulcrum 2c of a is set at a position that is an appropriate distance away from the connection point 2a with the lumbar floorboard 1b toward the head, so that the user's abdomen that is around the connection point 2a The weight acts in the direction of rotating and lifting the back floor plate 1a, thus reducing the force required to make the above-described undulations.

As described above, the crank handle 1 is fixed to the end of the screw shaft 5 and provided on the side surface of the bed frame 3.
By rotating 4, the back floor plate 1a can be rotated upward, and in conjunction with this, 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. Connect the crank handle 14 to the bed frame 3 like this.
Even if the grip part 15 is provided on the side surface of the floorboard, it will not be a hindrance to getting on and off the floorboard by setting the position in the space below the floorboard or by making the grip part 15 freely foldable.

(Embodiment) Next, the embodiment shown in the figure will be described. In this embodiment, the lumbar floor plate 1b is attached to the bed frame 3 by a floating support arm 16 rotatably supported on the bed frame 3. The movable support arm 16 is movably supported in the longitudinal direction, and the connection point 2d with the bed frame 3 is
When the floorboards 1a, 1b, lc are in a horizontal state, the lumbar floorboard 1
It is arranged closer to the back floor plate lc than the connection point 2e on the b side. Further, the foot floor plate 1c has a roller 17 on its end side.
The bed frame 3 is moved by a moving mechanism consisting of the guide frame 18 and the
It is supported so that it can be moved along.

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,
Therefore, as described 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
Because the connecting point 2e gradually rises due to rotation.

The waist floor plate 1b has a larger inclination angle than when the connecting portion 2a is simply lowered. However, the lumbar floorboard 1b
The inclination angle is the connection point 2a.

It can also be increased by increasing the distance between the connecting points 20 and increasing the downward movement of the connecting portions 2a, and therefore the above-described configuration of the floating support arms 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 shafts 5 are rotatably supported on the bed frame 3 by bearings 17 at both ends, and an actuating shaft 7 is attached to the bed frame 3 adjacent to these screw shafts 5. Although the specific structure of these support parts is not shown in the drawings, it goes without saying that an appropriate support mechanism can be applied. Further, the crank handle 14 has a wheel-like configuration, and is provided with a grip portion 15 on the outside thereof so as to be bendable, and a storage groove 18 for storing the grip portion 15 when bent. Also the second
Figure (b) shows an example of the drive link 13.
As described above, the spherical bearing portions 12 are provided at both ends.

This spherical bearing portion 12 includes an inner member 2 provided with a connecting shaft 19.
o, and an outer member 21 connected to the main body of the drive link 13, and the inner member 20 is connected to the connecting shaft 1 provided thereon.
9 are configured to be rotatable relative to the outer member 21 so as to face in directions perpendicular to each other.

(Effects of the Invention) As described above, the present invention connects the back floor plate, the lumbar floor plate, and the foot floor plate in a bendable manner, and places the back floor plate at a position an appropriate distance away from the connection point with the lumbar floor plate toward the head of the bed. By rotatably supporting the back floor plate on the frame and movably supporting the lumbar floor plate and the foot floor plate on the bed frame in the longitudinal direction thereof, the force required to rotate and raise the back floor plate can be reduced. In the bed, a push-up arm is provided under the back floor plate rotatably supported on the bed frame, and a pair of direction changing links provided on the operating shaft between the movable members moved by the screw shaft; Since a drive link with spherical bearings provided at both ends is provided, 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, it can be easily moved. Since it can be 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. Further, since the efficiency is not deteriorated, the operating force is not increased, and costs 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 a hindrance to getting on and off the floorboard. It has the effect of not being

[Brief explanation of drawings]

All of the figures show embodiments of the present invention, with FIG. 1 being a perspective view schematically illustrating the whole, and FIG. 2(a). (b) is an explanatory perspective view of the main part, and FIG. 3 (a). 4(b) and FIGS. 4(a) and 4(b) show the configuration together with the operation, and in each case, (a) is an explanatory side view;
(b) is an explanatory plan view. Code 1a... Back floor plate, 1b... Waist floor plate, 1c.
... Foot floorboards 1.2a, 2b, 2c, 2d, 2e = connection points, 3... bed frame, 4... pushing upper arm, 5
... Screw shaft, 6... Moving member, 7... Operating shaft, 8°9... Direction conversion link, 10... Long groove, 1
DESCRIPTION OF SYMBOLS 1... Operating pin, 12... Spherical bearing part, 13...
Drive link, 14... Crank handle, 15...
Grip portion, 16... floating support arm, 17... bearing,
18... Storage groove, 19... Connection shaft, 2o... Inner member, 22... Outer member.

Claims (3)

[Claims] (1) The back floor plate, the lumbar floor plate, and the foot floor plate are connected in a bendable manner, and the back floor plate is rotatably supported on the bed frame at an appropriate distance toward the head from the connection point with the lumbar floor plate. , 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, a push-up arm is provided on the lower side of the back floor plate, and a screw shaft is rotatably supported in the width direction of the bed frame. The female threaded portion of the movable member is screwed onto the threaded shaft, and an operating shaft is provided on the bed frame adjacent to the threaded shaft so as to be rotatable around a vertical axis, and an operating shaft is provided in the horizontal direction of the operating shaft. ,
A pair of direction change links are provided protrudingly, one direction change link is connected to the operating pin of the movable member via a long groove, and the other direction change link is provided at both ends between the push upper arm and the upper arm. A bed floor plate elevating mechanism, characterized in that a drive link is connected via a spherical bearing part, and a crank handle is fixed to an end of the screw shaft. (2) The crank handle described in item 1 is a mechanism for raising and lowering a bed floor plate, characterized in that the crank handle is fixed to both ends of a screw shaft. (3) The crank handle described in item 2 is a bed floor board elevating mechanism characterized in that the grip portion is foldable.