JPH066768Y2 - Lifting bed fall prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fall prevention device for a lift bed that can be stored in a ceiling when not in use.

[Problems to be Solved by Conventional Techniques and Inventions] With the diversification of lifestyles, the number of rooms equipped with beds has increased. Therefore, the bed cradle is hung by a wire or other suspending device and installed on a guide rail installed vertically between the ceiling and the floor surface, and the bed is vertically moved by the winding operation of this wire. There is also known a so-called lift bed in which the bed base can be housed close to the ceiling when not in use.

However, when the bed base is raised and stored on the ceiling side, it is assumed that the hanging tool that suspends the bed base, the chain of the drive device, etc. will be disconnected, and in such a case, the bed suddenly tilts or falls. It is frightening, extremely dangerous and unreliable.

[Means for Solving the Problems] The present invention was devised with the object of providing a fall prevention device for a lift bed that can eliminate these drawbacks in view of the above-mentioned circumstances, and guides on a guide rail. In the lifting bed, which is configured to be vertically moved up and down by the wire winding and rewinding operation of the drive device, the above-mentioned guide rail is located below the bed platform located at the ceiling side storage position, and the lifting bed is lifted. Of the stopper that is displaceable between the movement-permissible position that allows the movement and the movement-regulation position that regulates the movement, the bullet that urges the stopper toward the movement-permitted position side, and the bed base that is located at the ceiling-side storage position. The detection actuating means that is activated by the detection of the fact that the operation is performed and the detection actuating means and the stopper are interposed, and the stopper is moved from the movement-permissible position in association with the detection of the detection actuating means. It is characterized in that it is constituted by providing an operating rod for forcibly displacing it at a movement restriction position.

Further, according to the present invention, when the bed pedestal is housed on the ceiling side, the present invention can reliably prevent the bed pedestal from falling even if the lifting tool is cut.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a lifting bed pedestal that is formed in a rectangular shape with four side plates, and arms 2 horizontally project from four corners of the pedestal 1. Reference numeral 3 denotes four guide rails having a U-shaped cross section, which are erected from the ceiling T of the room to the floor FL, and two of them are provided along the same wall surface.
The arms 2 are vertically slidably inserted into the openings of the rails 3. At the top of the rail 3,
A wire 4 that suspends the bed pedestal 1 is fixed, and a drive device 6 that internally rotatably supports a wire drum 5 that winds the wire 4 arranged at the four corners is installed in substantially the center of the bed pedestal 1. . The wire 4 is wound around the wire drum 5 via a pulley 7 and a wire looseness detecting device 8. Then, by driving the driving device 6, the four wires 4 are simultaneously wound and evenly wound around the wire drum 5,
The arm 2 is guided by the guide rails 3 so that the bed pedestal 1 moves up and down in a horizontal posture. In the figure, 6a is an electric motor of the drive device 6, 9 is an operation switch, and 9
Reference character a is a curl cord (winding wire).

A pair of guide rods 11 are horizontally provided on both sides of the upper opening of each guide rail 3, and a cylindrical stopper 12 is provided on each of the guide rods 11 to move the arm 2 up and down. It is fitted in such a manner that it can slide back and forth between an allowable position (solid line position in FIG. 3) and a movement restriction position (virtual line position in FIG. 3) that restricts movement. 13 is a bending portion 1 on the head
An actuating rod having 3a, the bent portion 1 of the actuating rod 13
The central portion of 3a is pivotally supported on the guide rail 3 side by a pivot pin 14, and the lower portion is fixed to the stopper 12. Further, a bullet 15 is mounted between the tip of the front portion of the guide rod 11 near the bed and the stopper 12. In this bullet 15, the stopper 12 is provided on the bottom surface side of the guide rail 3,
In other words, it is always biased toward the movement permitted position side.

Reference numeral 16 is a solenoid provided on the guide rail side. When the solenoid 16 operates as described later, the piston rod 16a advances and the piston rod 16a
The push plate 16b at the tip of the lever is the bent portion 1 of the operating rod 13.
3a is pushed down, whereby the operating rod 13 swings forward around the pivot pin 14, so that the stopper 12 resists the ammunition 15 from the retracted movement permitting position to the guide rail 3 It slides toward the opening side of the arm 2 and advances to the movement restriction position which is the lower surface position of the arm 2. The detection when the bed base 1 is housed on the ceiling side is performed by, for example, a limit switch (not shown) provided in the drive device 6, and the solenoids 16 are simultaneously turned on by closing the limit switch. 16a is extended, and is turned off by the ON operation of the lowering operation switch 9 to be reduced.

Reference numeral 40 shown in FIGS. 9A and 9B is a guide wire penetrating the curl center of the curl cord 9a, and 41 is a conical take-up for rewinding and rewinding the guide wire 40 provided on the bed mount 1. The balancer is a curl cord 9a as shown in FIG. 8, especially when the bed platform 1 is raised.
The storage is designed so that it does not hang down sloppyly and has a linearly organized contraction shape as shown in FIG.

In the embodiment of the present invention configured as described above, when the drive device 6 is driven by the operation switch 9 to raise the bed platform 1 which is still at the floor lower limit position, the four wire drums 5 are formed. The wires 4 are simultaneously and evenly wound up, the bed pedestal 1 moves up and down in a horizontal state, the arm 2 of the bed pedestal 1 passes through the position of the stopper 12 provided in the guide rail 3, and rises, It will stop at the ceiling side storage position set by the closing operation of the upper limit switch (not shown).

On the other hand, solenoid 16 turns on when the limit switch is closed.
Then, the piston rod 16a expands, the push plate 16b pushes down the bent portion 13a of the operating rod 13, and the operating rod 13 swings around the pivot pin 14. This operating rod 13
12 fixed to the lower part of the table and in the movement permitting position
Will be swung forward toward the opening side of the guide rail 2 along the guide groove 11 against the ammunition 15 and set at the movement restricting position. Therefore, in this state, the provisional wire 4
Or the chain of the drive unit 6 is cut, the brake is loosened,
Even if it slips, the arm 2 of the bed pedestal 1 is provided with a stopper 12 extending below the arm 2.
Since it will be in a state of riding on, it is safe without falling.

Then, in order to lower the bed base 1, by operating the operation switch 9 to ON, the drive device 6 is reversely started, and the solenoid 16 is turned OFF, so that the piston rod 1
6a is retracted, the stopper 12 is retracted to the movement permitting position by the restoring force of the ammunition 15, the passage restriction of the arm 2 is released, and the bed pedestal 1 is guided by the guide rail 3 having no obstacles. Will descend.

As described above, in the embodiment of the present invention, the stopper 12 extends below the arm 2 to prevent the bed pedestal 1 from falling when the bed pedestal 1 is stopped at the ceiling side storage position. Therefore, even if the wire 4, the chain is cut or the brake is broken, the stopper 12 supports the lower surface of the arm 2, and the bed pedestal 1 does not drop at all, which is extremely safe.

Of course, the present invention is not limited to the above embodiment, and as shown in FIG. 6, the wire slack detection switch 21 and the ammunition 22 are attached near the upper end of the guide rail 3,
The wire 4 for suspending the bed pedestal 1 is fixed to the lower end of the ammunition 22, and the tips of the detection leads 23 are connected to the lower part of the ammunition 22. The wire slack detection switch 21 is turned ON by utilizing the fact that the wire 4 loosens a little at the moment when
Alternatively, the solenoid 16 may be turned on.

In this embodiment, when the bed gantry 1 is moving, if normal, the wire 4 is tensioned, the ammunition 22 is in the extended state, and the detection lead 23 holds the detection switch 21 in the OFF state, but the ceiling side storage position. When the wire 4 is cut or loosened, the tip of the bullet 22 is pulled up and the detection lead 23 switches the detection switch 21 to ON, not only when the stopper 12 is stopped. Not only the storage position of the bed pedestal 1 but also the guide rail 3 provided at several places in the vertical ascending / descending path, when an attempt is made to drop the wire due to an accident such as wire cutting during the ascending / descending operation, either stopper 12 It can be used for emergency stop of the electric motor 6a by being interlocked with the drive device 6 by being received by the drive device 6.

Further, as in the embodiment shown in FIG. 7, the stopper may be mechanically operated without using any electric power such as a solenoid. In other words, this is a guide rod 11, a stopper 12,
The actuating rod 13 and the pivot pin 14 are the same as those in the above-described embodiment, but 31 is a connecting rod, 32 is a connecting pin, 33 is a pivot, 34 is a detection lever, and 35 is a bifurcated long piece 35a.
And a forked lever having a short piece 35b. A detection lever 34 and a two-pronged lever 35 are pivotally supported on the pivot 33, and an upper end of the connecting rod 31 has a connecting pin 3 at an upper end of the detecting lever 34.
2 is rotatably connected, and the lower end is connected to the bent portion 13a of the operating rod 13. A detection roller 36 is rotatably supported by the lower end of the detection lever 34.
A bullet 37 is mounted near the detection roller 36 and between the tips of the short pieces 35b. Further, one end of a bullet 38 is locked to the tip of the bifurcated lever 35, and the other end of the bullet 38 is fixed above the guide rail 3. Moreover, the wire 4 for suspending the bed pedestal 1 is locked to the suspension base 39 near the pivot 33 of the bifurcated lever 35. Then, while the bed base 1 is moving, the forked lever 35 is held at a predetermined position and rides on the locking pin 40 to be locked so that the detection roller 36 of the detection lever 34 is at the lowest position (FIG. 7A). Ammo power is set.

Now, when the bed base 1 rises and the upper surface of the arm 2 comes into contact with the detection roller 36 (the arm 2 is stopped by an upper limit switch (not shown) near the locking pin 40), the detection lever 34 moves. It swings around the pivot 33 to push down the connecting rod 31, and the stopper 12 is pushed by the operating rod 13 to advance to the movement restricting position below the arm 2 (FIG. 7B). Incidentally, as shown in FIG. 7C, even if the wire 4 is cut at the storage position on the ceiling side, the bed pedestal 1 is lowered by a slight distance and the arms 2 at the four corners of the stopper 12 at the movement restricting position. You will get on top and be stably supported.

[Advantageous Effects] In summary, since the present invention is configured as described above, the stopper is automatically displaced to the movement restricting position in response to the bed base being located at the ceiling storage position, and the bed base Therefore, even if the wire or chain is cut off or the brake breaks down during storage on the ceiling side, the bed pedestal will never drop unexpectedly, and the safety will be extremely high. .

[Brief description of drawings]

1 is a schematic perspective view of a bed base, FIG. 2 is a side view of the same, and FIG. 3 is a fall prevention device according to the present invention. Of FIG. 4, FIG. 4 is a front view of the same main part, FIG. 5 is a sectional view of FIG. 4A-A, and FIG. 6 is a side view of a fall prevention device of another example, FIG. 7A,
9B and 9C are side views of a fall prevention device of another example, FIG. 8 is a side view of the bed mount when it is stored, and FIGS. 9A and 9B are explanatory views of the winding balancer. In the figure, 1 is a bed stand, 2 is an arm, 3 is a guide rail, 4 is a wire, 10 is a fall prevention device, 12 is a stopper, 13 is an operating rod, 15 is an ammunition, and 16 is a solenoid.

Claims (1)

[Scope of utility model registration request] 1. A bed frame guided by a guide rail,
In the lifting bed configured to be lifted up and down by the wire winding and rewinding operation of the drive device, the guide rail is
A stopper, which is located below the bed pedestal located at the ceiling-side storage position, is displaceable between a movement permitting position that allows the movement of the lifting bed and a movement regulation position that regulates the movement, and the stopper is at the movement permitting position side. The ammunition urged toward, the detection operating means that operates by detecting that the bed base is located at the storage position on the ceiling side, and the detection operating means interposed between the detection operating means and the stopper. A fall prevention device for a lift bed, comprising: an operating rod for forcibly displacing a stopper from a movement-permitted position to a movement-regulated position in association with detection.