JPH0414051Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fall prevention device for an elevating bed that can be stored in the ceiling when not in use.

[Problems to be solved by the prior art and the invention] Today, with the diversification of lifestyles, more and more rooms are equipped with beds. However, if this bed is of a fixed type, the dedicated floor space cannot be used effectively, and in some rooms where the area of the room is small, it is virtually impossible to install a bed. Therefore, the bed frame is attached to a vertically facing guide rail installed between the ceiling and the floor so as to be movable up and down, and the bed frame is suspended by a wire, etc., and the bed frame is suspended by the winding operation of the wire. A structure has been proposed in which the bed frame is configured so that it can be moved up and down while in a horizontal position, and the bed frame can be stored in a horizontal position when not in use. However, in this case, if the wire were to break, the bed frame would tilt or fall, causing damage to the guide rail and the bed frame, which was extremely dangerous and problematic.

[Means for solving the problem] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a fall prevention device for an elevating bed that can eliminate these drawbacks. In an elevating bed in which the bed frame is moved up and down along a guide rail by winding and unwinding a wire whose tip end is connected to the frame side, the bed frame has a wire that engages with a locking portion on the guide rail side. A stopper that is always biased in the stopping direction is provided, and the stopper is connected to the tensioned wire tip so as to maintain the stopper in a released position in which the lock with the locking part is released, and the wire is cut. The present invention is characterized in that the stopper is locked to the locking portion due to the accompanying loss of tension, thereby preventing the bed frame from falling.

With this configuration, the present invention makes it possible to immediately prevent the bed frame from falling in response to the cutting of the wire.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a bed frame of an elevating bed, which is formed into a rectangular shape with side plates 1a, etc., and support arms 2 are integrally provided at its four corners. A guide roller 3 is rotatably supported at the tip of the support arm 2, and these guide rollers 3 are attached to four guide rails 4 installed between the ceiling and the floor and facing in the vertical direction.
It seems to be rolling inside. Further, at the tip of the support arm 2, a safety device 5, which will be described later, is attached to a support shaft 6.
A ring portion 8a formed at the lower end of the wire 8 is inserted through and locked into a locking pin 7 provided at the upper part of the safety device 5. On the other hand, a frame 9 is installed between the upper portions of the guide rails 4, and a shaft 10 is rotatably supported between the frames 9 via a bearing 9a. Four wire drums 11 having the same diameter are integrally attached to the shaft 10. Wires 8 connected to the safety devices 5 at the four corners of the bed frame are wound around the corresponding wire drums 11 via guide pulleys 12. Further, a worm gear mechanism 13 is disposed at one end of the shaft 10, and by operating an operating string 13a pulled out from the worm gear mechanism 13, the shaft 10 is rotated in forward and reverse directions. By rotating the shaft 10 and integrally rotating the wire drum 11, the four wires 8 can be wound and unwinded approximately evenly. The bed frame 1 is configured to be vertically movable along guide rails 4 while remaining in a substantially horizontal position.

Further, the safety device 5 includes a locking pin 7, a link 1
4. It is composed of a pair of stoppers 15, etc., and the stopper 15 has an intermediate portion rotatably supported by a support shaft 6, and a torsion bullet wound around the support shaft 6. 17, the lower claw portion 15a is always urged in the direction of expansion. Further, at the upper end of the stopper 15, the lower end of the link 14 whose upper end is pivotally supported by the locking pin 7 is connected to the pin 1, respectively.
6. And stoppa 15
When the bed frame 1 is suspended by the wire 8, the tension of the wire 8 under the weight of the bed frame 1 resists the torsion machine 17, and the opposing distance becomes narrow (Fig. 4A). (see) and is in a narrow posture (released posture). And in this position, the stopper 15
is an inner rail 18 fitted inside the guide rail 4.
The wire 8 moves freely up and down without contacting the protrusion 18a, but if the wire 8 is cut, the tension of the wire 8 is lost, and the stopper 15 is then moved by the biasing force of the torsion bomb 17. The bed frame 1 is momentarily expanded in response to the movement of the bed, and is locked and received by the protrusion 18a, thereby preventing the bed pedestal 1 from falling.

In the embodiment of the present invention constructed as described above, the bed frame is raised and lowered by winding and unwinding the wire 8 that suspends the four corners of the bed frame 1 as described above. The stopper 15 is in a released position in which the gap between the claws 15a is narrowed due to the wire 8 being in a tensioned state.
The bed frame 1 can be moved up and down without any problem. However, when the wire 8 is cut and its tension is lost, the stopper 15 immediately receives the accumulating force of the torsion bomb 17, expands between the claws 15a, and is locked to the protrusion 18a on the guide rail 4 side. .
Therefore, the bed frame 1 is fixed at this position and can be reliably prevented from falling.Moreover, since the stopper 15 is a member for connecting the bed frame 1 and the wire 8, the tension of the wire 8 is In response to the resolution of the problem, almost instantaneous fall prevention can be performed,
It can provide extremely high safety.

It should be noted that the present invention is of course not limited to the above embodiments, and as shown in FIG.
The locking arm 19 is rotatably supported by a pivot 20, and the locking arm 19, which is maintained in the released position by the tension of the wire 8 in normal times, is twisted by the tension of the wire 8 and the trigger 17 The guide rail 4 may be configured to receive the accumulated force and engage with a locking portion 4a protruding from the guide rail 4.

[Operations and Effects] In summary, since the present invention is constructed as described above, when the wire suspending the bed frame is cut and its tension is lost, the tension can be used to release the bed into the released position. The stopper, which had been kept in place, immediately changes its shape and locks into the locking portion on the guide rail side, thereby preventing the bed frame from falling. Moreover, the stopper that prevents this fall is
Since it is a member for connecting the bed frame and the wire, this is done directly and automatically in response to the loss of tension in the wire, and therefore the bed frame can be quickly and effectively prevented from falling. Therefore, it can be made extremely safe.

[Brief explanation of the drawing]

The drawings show an embodiment of the fall prevention device for an elevating bed according to the present invention, in which FIG. 1 is a schematic perspective view of the elevating bed, FIG. 2 is a plan view of the main part,
Figure 3 is an exploded perspective view of the guide rail, Figure 4 is an explanatory view of A and B, Figure 5 is a perspective view of the main part, Figure 6 is
The figure is a perspective view of main parts showing another example. In the figure, 1 is a bed frame, 4 is a guide rail, and 8
is a wire, 15 is a stopper, 17 is a twister, 1
8a is a protrusion.

Claims (1)

[Scope of utility model registration request] In an elevating bed in which the bed frame is moved up and down along a guide rail by winding and unwinding a wire whose tip end is connected to the bed frame side,
The bed frame is provided with a stopper that is constantly biased in the direction of locking the locking portion on the guide rail side,
The stopper is connected to the tip of a tensioned wire in order to maintain it in a released position in which the stopper is released from the locking portion, and the stopper is locked to the locking portion due to the loss of tension caused by cutting the wire. 1. A fall prevention device for an elevating bed, characterized in that the device is configured to prevent a bed frame from falling by stopping the bed.