JPS5948100B2 - 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 raise 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 such problems, and its gist is that a pressure sensing lever is disposed between a floorboard and a frame, and a pressure sensing lever is provided between the lever and the floorboard. The bed is configured in such a way that when a part of the body is pinched, the sensing lever deforms and acts on the limit switch Rondo, cutting off the power to the motor.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In Figures 1 to 7, 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°18.19 and 20 and 21,22,23
and 24 are supporting members fixed to the connecting member 14 and the connecting member 15, respectively.

Thus, the support members 17 and 21 are attached to the right side of the helad board 12, and the support members 20 and 24 are attached to the right side of the footboard 13.
are in contact with the left side of each.

Further, the support pieces 18 and 2''2 are located slightly to the left of the center of the connecting members 14 and 15, respectively, and the support members 19 and 23 are located slightly to the left of the center of the connecting members 14 and 15, respectively.
and is located approximately midway between support members 22 and 24.

A fixed floor plate 25 is supported and fixed to two supporting members 18 and 22, and a head raising/lowering floor plate 26 is pivotally supported on the left side of the fixed floor plate 25.

An arm 27 is fixed to the lower part of the head raising and lowering floor board 26, and by pushing and pulling this arm 27 with a motor 29 via a transmission mechanism 28, the head raising and lowering floor board 26 is raised and lowered. It has become.

30 is a leg raising/lowering floor board, which includes a first floor board 31 and a second floor board 3.
2, the first floor plate 31 has its left side on the right side of the fixed floor plate 25, and its right side has the first floor plate 3 on the right side of the fixed floor plate 25.
They are each pivoted on the left side of 2.

Therefore, the right side of the first floor plate 32 has two arms 33.3.
The right side of the arm 33, 34 is pivoted, and the left side of the arm 33, 34 is pivoted on the support members 19, 23, respectively.

An arm 35 is fixed to the lower part of the first end plate 31,
The arm 35 is pushed and pulled by a motor 38 via a transmission mechanism 37 to raise and lower the first floorboard 31.

As the first floor plate 31 is raised and lowered, the angle between the first floor plate 31 and the second floor plate 32 changes.

Here, the transmission mechanism 37 will be explained based on FIGS. 3 and 4. Reference numeral 39 is a bracket welded to the pipe 16, and a gear box 41 is held by a screw 40.

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 38a of the motor 38 are connected via a flexible cable 44.

A sleeve 45 is rotatably supported by the gear box 41. A gear 46 perpendicular to the worm gear 43 is mounted on the outer periphery of the sleeve, and a screw shaft 47 is screwed into the sleeve.

Then, as the motor 3B operates, the worm gear 43
When the screw shaft 47 rotates, the screw shaft 47 moves forward and backward relative to the sleeve 45.

Since the screw shaft 47 is fixed to the arm 45, the first floor plate 31 is raised and lowered by the motor 38.

48 is a suppression sensing lever, the right end of which is supported by the support member 20, and the left end of which is supported by the right wall 18 of the support member 18.
It passes through a bushing 49 attached to a and faces a rod 51 of a limit switch 50 located at the lower part of the fixed floor plate 25 and fixed to the side wall 18b of the support member 18, so that the suppression sensing lever 48 is pressed. When the left end of the rod rises, the rod 51 is held down and the limit switch 50
is set to turn off.

Note that the left end of the pressure sensing lever 48 is threaded, and the retainer 52 is screwed onto the thread.
A spring 53 is stretched between the bushing 49 and the bushing 49.

This can be done by changing the position of the retainer 52.
The pressure sensing lever 54, which is a support member for preventing the left end of the pressure sensing lever 48 from rising due to its own weight, has a similar configuration.

Here, an electric circuit 55 for operating the motor 38
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 a capacitor, 68 is the main winding of motor 38, 69 is motor 3
When the lever 61a of the selector switch 61 is turned down and the auxiliary winding 8 is connected to the terminal 62a, the relay 62 is activated, its contact 65 is closed, and the main winding 68 of the motor 38 is energized, causing the motor 38 to rotate. The shaft 38a is connected to the first floor plate 31
It is designed to rotate forward in order to raise the

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 50 connected in series with the contact point 66 is normally turned on, the auxiliary winding 69 of the motor 38 is excited, and the rotating shaft 38a of the motor 38 is reversed to lower the floor plate 31. It looks like this.

Note that the lever 61a4 can be maintained at a neutral position between the terminal 62a and the terminal 63a, so that neither the relays 62 nor 63 are activated.

Incidentally, the motor 29 is also operated by a similar circuit (path shown).

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 38 is activated and its rotating shaft 38a rotates in the normal direction.

This normal rotation is transmitted to the transmission mechanism 37, that is, the worm shaft 42 and the gear 46.

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 right as seen in FIG. 1 and forward as seen in FIG. 4, and while urging the arm 35, rotates the first floor plate 31 counterclockwise to raise it.

Then, the second floor plate 32 rises while rotating clockwise while contracting the angle it forms with the first floor plate 31 and widening the angle it forms with the arm 33.

Then, when the leg raising/lowering floor board 30 takes the desired shape, when the lever 61a is released from the terminal 62a and brought to the neutral position, the motor 38 is stopped and the first floor board 31 and the second floor board
Rotation of the floorboard 32 is stopped.

Next, push down the lever 61a of the changeover switch 61 to connect the terminal 63
a, the rotating shaft 38a of the motor 38 reverses and the screw shaft 47 moves to the left as seen in FIG. 1 and to the rear as seen in FIG. , rotate counterclockwise and clockwise, respectively, while widening the angle formed between the two.

At this time, if a part of the body such as a limb is pinched between the pressure sensing lever 48 and the first floorboard 31 (or the second floorboard 32), the sixth
As shown in the figure, the center portion of the pressure sensing lever 4 is bent downward, and at the same time, the left end portion is raised, the ronde is pressed, and the limit switch 50 is turned off.

Therefore, since rotation of the first floor plate 31 (or second floor plate 32) is prevented, parts of the body such as the limbs that are pinched will not be damaged.

As described above, in the present invention, a pressure sensing lever is disposed between a floorboard and a frame, and when a part of the body such as a limb is caught between the lever and the floorboard, the pressure sensing lever deforms. Since the bed is constructed so that the limit switch acts on the rond of the limit switch, turns off the limit switch, and cuts off the power to the motor, it is possible to prevent unexpected accidents and has a great effect.

In addition, in the present invention, by supporting the pressure sensing lever with the support member, it is possible to prevent the pressure sensing lever from deforming due to its own weight. This has the effect of being able to adjust the sensitivity of the sensing lever.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the bed according to the present invention, and FIG.
The figure is a view in the direction of arrow C in Figure 3, Figure 3 is a view in the direction of arrow C in Figure 3, Figure 4 is a view in the direction of arrow C in Figure 3, and Figure 5 shows the state inside the gear box of the transmission mechanism. FIG. 6 is a diagram showing the mounting state of the pressure sensing lever, and FIG. 7 is an electric circuit diagram for operating the motor. 31. 32: Floor plate, 38: Motor, 48: Pressure sensing lever, 50: Limit switch, 52: Retainer (supporting member), 53 Nispring (supporting member).

Claims (1)

[Claims] 1. In a bed in which a transmission mechanism is actuated by a motor to raise and lower a floorboard relative to a frame, a pressure sensing lever disposed between the floorboard and the frame, and a pressure sensing lever disposed at one end of the suppression sensing lever are provided. and a support member provided inside the limit switch to support the pressure sensing lever, and deformation of the sensing lever turns off the limit switch and cuts off power to the motor. A bed characterized by: