JPH0216744Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a drive mechanism for raising and lowering the floor of a bed, patient carrier, examination table, etc.

(Prior art and its problems) For example, in a bed, a desired part of a floor divided into multiple parts can be raised and lowered by rotation, or a floor support frame that supports the floor can be raised and lowered horizontally. Or,
A crank handle is widely used as a drive mechanism for raising and lowering a floor such as tilting it. Conventionally, when the crank handle is used to raise and lower the floor, the operator has to look directly at the floor between operations to check the amount of elevation, making the operation relatively cumbersome.

The present invention aims to solve this problem by making it possible to check the amount of elevation of the floor while operating the crank handle without directly looking at the floor. A detailed explanation will be given below based on examples.

(Means for Solving the Problems) Reference numeral 1 denotes a drive shaft connected to a lifting mechanism for a floor 3 such as a bed 2, and a crank handle 4 is connected to an end of this drive shaft 1. This drive shaft 1 may be, for example, a shaft connected to the end of a screw shaft 5 constituting a screw shaft type lifting mechanism, or a rotating shaft connected to this via an appropriate rotational force transmission mechanism, but the lifting mechanism is a screw shaft. Even if it is not a type, any mechanism using the crank handle 4, such as a pulley mechanism, may be used. Therefore, a display strip 6 is placed near the crank handle 4.
At the same time, one end of the display strip 6 is wound around the drive shaft 1 and fixed so as to be freely rewound. Appropriate indications 7 such as scales, numbers, symbols, colors, etc. corresponding to the amount of elevation of the floor 3 are provided on the display strip 6. As the display strip 6, a suitable strip such as a steel strip or a resin strip can be used, and any method for wrapping and installing the display can be used as long as it can be unwound. For example, although not shown, the winding installation method is similar to the automatic blade rewinding mechanism in a tape measure, in which the other end of the display strip 6 is connected to a mainspring installed in the case. A structure in which a mainspring is wound when the display strip 6 is pulled out from the case, a structure in which a drum or the like around which the display strip 6 is wound is biased in the rotational direction by the mainspring, and a pre-stress on the rigid band. A configuration in which a rigid band of a constant torque spring made into a spiral shape by adding a curve to the display band-shaped body may be used as appropriate.

When the display strip 6 described above is covered with an appropriate case 8, a display window 9 is formed in the case 8. A magnifying lens 10 is provided in this display window 9.
The display 7 may be enlarged by attaching a. In some cases, the cover may not be provided.

(Function) In the above configuration, by rotationally driving the drive shaft 1 with the crank handle 4, the floor portion 3 can be raised and lowered via a lifting mechanism such as a screw shaft type lifting mechanism. If the drive shaft 1 is rotated clockwise in Fig. 2, the drive shaft 1 will rotate as it rotates.
The display strip 6 wraps around the display window 9, and the display 7 corresponding to the display window 9 gradually shifts. Further, when the drive shaft 1 is rotated counterclockwise, the display strip 6 is rewound to the vicinity of the drive shaft 1, and the display 7 is moved in the opposite direction. In this way, an operator such as a nurse or an attendant can indirectly raise or lower the floor 3 by looking at the display 7 on the display strip 6 near the crank handle 4 while operating the crank handle 4. Since you can check the amount, that is, the current position,
There is no need to directly look at the floor part 3 between operations to check the amount of elevation, unlike in the past, and the operations are not troublesome.

(Other Embodiments) Here, another embodiment will be described. In the embodiment shown in FIG. It consists of a torque spring, and in the vicinity of the drive shaft 1, the winding drum 1
The drive shaft 1 is wound in a spiral shape in the direction of curvature due to prestress, and the drive shaft 1 is wound in a spiral shape in the opposite direction to the curvature, and one end is fixed. In this configuration, the display strip 6 urges the drive shaft 1 in the direction of raising the floor 3, so that the force required to raise the floor 3 can be reduced.

(Effects of the invention) As described above, the present invention allows the display belt to be freely unwound near the crank handle connected to the end of the drive shaft connected to the floor lifting mechanism of a bed, etc. At the same time, one end of the display strip can be wrapped around the drive shaft and fixed freely, and the display strip can provide a display corresponding to the amount of elevation of the floor. Operators such as attendants can indirectly check the amount of elevation of the floor by looking at the vicinity while operating the crank handle, and are therefore able to raise and lower the floor without any hassle. effective.

[Brief explanation of the drawing]

The figures correspond to embodiments of the present invention; FIG. 1 is an explanatory perspective view of the external appearance, FIGS. 2 a and b are explanatory perspective views showing the configuration and operation of the main parts, and FIG. FIG. 4 is a perspective view illustrating the configuration of an example, and FIG. 4 is a diagram illustrating the state of use. Code 1... Drive shaft, 2... Bed, 3... Floor section,
4... Crank handle, 5... Screw shaft,
6...Display strip, 7...Display, 8...Case, 9...Display window, 10...Enlargement lens, 11
...Take-up drum.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A crank handle is connected to the end of a drive shaft connected to a lifting mechanism for the floor of a bed, etc., and a display band is freely unwound around the crank handle. 1. A drive mechanism for lifting and lowering a floor portion, characterized in that one end of the display band-shaped body is wound around the drive shaft and fixed freely. (2) The drive mechanism for raising and lowering a floor according to claim 1, wherein the display strip is configured to bias the drive shaft in a direction to raise the floor. (3) The drive mechanism for raising and lowering a floor according to claim 1, wherein the display strip is covered by a case in which a display window is formed.