JPS5948099B2 - Betsudo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bed, and more particularly to an adjustable bed in which a floor plate is raised relative to a frame.

Conventionally, in this type of bed, the floorboards were raised and lowered by operating a transmission mechanism using a motor, but when attempting to lower the floorboards, parts of the body, such as limbs, were caught between the floorboards and the frame. There was a problem that the product could be damaged due to being damaged.

An object of the present invention is to provide a bed that eliminates the above-mentioned problems, and the gist is that when a part of the body such as a limb is caught between the floorboard and the frame, the motor and power supply The reason is that the bed is configured to turn off a limit switch interposed between the

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In Figures 1 to 8, 10 is the bed and frame 1.
1.

The frame 11 includes a headboard 12 and a footboard 1.
3, two parallel connecting members 14 and 15 that connect both boards 12 and 13, and a pipe 16 that connects both connecting members 14 and 15 at the lower part thereof.

17° 18 and 19 are support pieces fixed on the connecting member 14, the left side of the support piece 17 comes into contact with the right side of the helad board 12, and the right side of the support piece 19 comes into contact with the left side of the footboard 13, respectively. The support piece 18 is located slightly to the left of the center of the connecting member 14.

20. 21 and 22 are support pieces fixed to the connecting member 15, and the left side of the support piece 20 is in contact with the right side of the helad board 12, and the right side of the support piece 22 is in contact with the left side of the footboard 13, respectively. The support piece 21 is located to the left of the center of the connecting member 16 and faces the support piece 18.

23 is a fixed floor plate with four supporting pieces 18, 19゜21.22
The footboard 13 is supported and fixed, and its length in the lateral direction is approximately the same as the length of the footboard 13.

24 is an up/down floor board, and from the right end side there is a pair of metal plates 25.
, 26 protrude, and this metal plate 25.26 is rotatably connected to a pair of metal plates 27.2B protruding from the left end surface of the fixed floor plate 23 by a pin 29.30.

A pair of arms 31.degree.
When the motor 33 is actuated to urge the 1° 32 to the left via the transmission mechanism 34, the raising/lowering floor plate 24 is moved by the pin 29.3.
0 in the clockwise direction, and the left end of the raising/lowering floor plate 24 is separated from the support pieces 17 and 20.

Motor 33 connects pipe 1 with bolt 35 and nut 36.
It is fixed to a support plate 37 that is welded to 6.

Therefore, a vibration-proofing rubber 38 is interposed between the motor 33 and the support plate 37 to prevent the vibration of the motor 33 from being transmitted from the pipe 16 to the entire frame as much as possible as the motor 33 operates. .

39 is a bracket welded to the pipe 16, and a screw 40
The gear box 41 is held in place.

42 is a worm shaft equipped with a worm gear 43, and an end portion 42a protrudes from the gear box 41.

The end 42a of the worm shaft 42 and the rotating shaft 33a of the motor 33 are connected via a flexible cable 44.

A sleeve 45 is rotatably supported by the gear box 41, and a gear 4 perpendicular to the worm gear 43 is mounted on the outer periphery of the sleeve.
6 is attached, and its inner periphery is threaded and a screw shaft 47 is screwed into it.

When the worm gear 43 rotates with the operation of the motor 33, the screw shaft 47 moves forward and backward relative to the sleeve 45.

A cap 48 is fitted onto the left end of the screw shaft 47, and a flange 49 is provided around the opening of the cap, and a tongue portion 50 projects from the distal end surface 48a.

However, the tongue portion 50 of the lever is provided with a pin 51.
One end 51a and the other end (path shown) of the pin 51 pass through elongated holes 52 and 53 formed in the arms 31 and 32, respectively.

Further, since the raising/lowering floor board 24 tends to rotate counterclockwise due to its own weight, one end 51a of the pin 51 is connected to the elongated hole 52.
It is engaged with one end of the elongated hole 52 and has a clearance between it and the other end of the elongated hole 52 .

Although the other end of the pin 51 is also not shown, it engages with one end of the elongated hole 53 and has a clearance between it and the other end of the elongated hole 53.

A limit switch 54 is attached to the side of the arm 31, and its lever 54a is connected to one end 5 of the pin 51.
1a is pressed.

In this state, the limit switch 54 is on, but when the lever 54a disengages from the one end 51a of the pin 51, the lever 54a rotates counterclockwise by a predetermined angle. to turn off the limit switch 54.

In this 5, an electric circuit 55 for operating the motor 33 is installed.
To explain based on FIG. 8, 56 is a power supply, 57
is a fuse, 58 is a transformer, 59 is a rectifier, 60 is a smoothing capacitor, 61 is a selector switch, 62 is a rising relay, 63 is a falling relay, 65 is a contact of the rising relay 62, 66 is a contact of the falling relay 63 , 67 is the capacitor, 68 is the main winding of the motor 33, 69 is the motor 3
When the lever 61a of the selector switch 61 is turned down and the auxiliary winding 3 is connected to the terminal 62a, the relay 62 is activated, its contact 65 is closed, and the main winding 68 of the motor 33 is energized, causing the motor 33 to rotate. The shaft 34 rotates in the normal direction to raise the raising/lowering floor board 24.

Further, when the lever 61a is pushed down and connected to the terminal 63a, the relay 63 is activated and its contact 66 is closed.

Since the limit switch 54 connected in series with the contact 66 is normally on, the auxiliary winding 69 of the motor 33 is energized, and the rotating shaft 34 of the motor 33 is reversed in order to lower the floor plate 24. It looks like this.

Note that the lever 61a maintains a neutral position between the terminal 62a and the terminal 63a, so that neither the relays 62 nor 63 are activated.

To describe the operation in the above configuration, the changeover switch 61
When the lever 61a is pushed down and connected to the terminal 62a, the motor 33 is activated and its rotating shaft 34 rotates in the normal direction.

The normal rotation of the rotating shaft 34 of the motor 33 is transmitted via a flexible cable 44 to a transmission mechanism 34, that is, a worm shaft 4.
2. The signal is transmitted to a gear 46 formed on the worm shaft 42.

When the gear 46 rotates in the normal direction, the sleeve 45 also rotates in the normal direction, and the screw shaft 4
7 moves to the left as seen in Figures 1 to 3, and arm 3
1° 32, the raising/lowering floor plate 24 is rotated clockwise and raised.

When the motor 33 operates, it vibrates and generates a noise (so-called chattering sound). 34 is connected to the transmission mechanism by a flexible cable 44, vibrations are suppressed and therefore the associated noise is also reduced.

When the arms 31 and 32 are biased by the transmission mechanism 34 and the rotating raising/lowering floor plate 24 comes to the desired position, the lever 61a is activated.
When the terminal 62a is separated from the terminal 62a and brought to the neutral position, the motor 33 stops and the rotation of the up/down floor plate 24 stops.

Next, push down the lever 61a of the changeover switch 61 to
3a, the rotating shaft 34 of the motor 33 is reversed and the screw shaft 47 moves in the right direction as seen in FIGS. 1 to 3.

At the same time, the raising/lowering floor board 24 rotates counterclockwise under its own weight.

At this time, when a part of the body such as a limb is caught between the connecting member 15.16 and the raising/lowering floor plate 24, the screw shaft 47 further moves to the right and one end 51a of the pin 51 is inserted into the elongated hole 52. The other end portion escapes toward the other end of the elongated hole 53, and the limit switch 54 is turned off.

However, when the limit switch 54 is turned off, the operation of the motor 33 is stopped as is clear from the circuit shown in FIG. As a result, the raised/lowered floor plate 24 is not forced to rotate in the counterclockwise direction due to the movement of the screw shaft 47, and parts of the body such as the limbs that are held therein are not damaged.

As described above, the present invention provides a bed in which the transmission mechanism is operated by a motor to raise and lower the floorboard relative to the frame.
An arm having an elongated hole bored in the floor plate, and a pin passing through the elongated hole and engaging with one end of the elongated hole in the transmission mechanism, respectively, are provided between the floor plate and the frame to hold limbs, etc. When a part of the body or other object is pinched, a limit switch equipped with a lever that is pressed by the pin is turned off to cut off the power to the motor, thereby preventing a serious accident. This has great effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the bed according to the present invention, and FIG.
The figure is a sectional view taken along the line ■-■ in Figure 1, Figure 3 is a perspective view of the raising/lowering floor board, Figure 4 is an enlarged view of section A in Figure 2, and Figure 5 is a cross-sectional view of Figure 2 ■.
6 is a sectional view taken along line -v, FIG. 6 is a diagram showing the state inside the gear box, FIG. 7 is a view taken in the direction of arrow B in FIG. 5, and FIG. 8 is an electric circuit diagram for operating the motor. 11... Frame, 24... Lifting floor plate, 31° 32... Arm, 33... Motor, 34... Transmission mechanism, 52, 53...
...Elongated hole, 54...Limit switch, 54
a... Lever.

Claims (1)

[Claims] 1. In a bed in which a transmission mechanism is operated by a motor to raise and lower a floor plate relative to a frame, an arm having a long hole bored in the floor plate is inserted into the transmission mechanism, and an arm is inserted through the long hole into the transmission mechanism. A limit switch is provided with a pin that engages with one end of the hole, and has a lever that is pressed by the pin when a part of the body such as a limb or other object is caught between the floor plate and the frame, and the limit switch is turned off. A bed configured to cut off electricity to the motor.