JP2962414B1 - Motorized bed having an extension / reverse extension mechanism with bottom horizontal detection means - Google Patents

Abstract

An object of the present invention is to provide a bed having an extension / reverse extension mechanism.
Means for detecting the posture of the bottom are provided so that the bottom can be returned to the horizontal state, and the adjusting operation is automatically stopped when returning to the horizontal state. SOLUTION: An angle sensor 16 is provided on a longitudinal side portion of a bed frame 5. During the operation of the extension / reverse extension mechanism 2,
When it is determined from the detection signal of the angle sensor 16 that the bottom is in a horizontal state, control is performed so as to stop the operation of the mechanism for performing the stretching or reverse stretching operation.
A well-known type such as a capacitance type or a magnetic type can be applied to the angle sensor 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorized bed provided with a bottom extension / reverse extension mechanism, for example, in which a bottom level detection means is provided so that the bottom can be easily returned to a horizontal state. The present invention relates to an electric bed having an extension / reverse extension mechanism having a bottom horizontal detecting means.

[0002]

2. Description of the Related Art As a function of changing the posture of the bottom of a bed, there is an extension / reverse extension mechanism (Trendelenberg, reverse blendelenberg). This can be achieved by lowering the head side of the entire bottom or lowering the foot side
It is a function of holding, but the degree of freedom is remarkably improved in adjusting the posture of the bottom of the bed, and it can be said that this function is convenient for treatment and care.

[0003]

On the other hand, the horizontal position of the bed frame is difficult to understand, and a bed user often lies down with the bottom inclined. In conventional beds, high-low operation is performed to the upper limit or lower limit in order to return the bed frame to a horizontal position, which is inefficient. The present invention has been proposed in order to improve such a problem, and in particular, in an electric bed having a bottom extension / reverse extension mechanism, a means for detecting the posture of the bottom is provided, It has a stretching / reversing / stretching mechanism equipped with a bottom level detecting means that can easily return the bottom to the horizontal state and automatically stop the adjusting operation when returning to the horizontal state. An object of the present invention is to provide an electric bed.

[0004]

To SUMMARY OF THE INVENTION To solve the problems described above, the present invention is the electric bed with a bottom of wrought / Gyakuten Shin mechanism, an angle sensor provided on the bed body, the bottom is Exhibition Bottom horizontal from stretched / reverse stretched state
Return operation by the expansion / reverse expansion mechanism to return to the state
And the bottom is returned to a horizontal state by the angle sensor.
Upon detecting the return, the operation of the expansion / reverse expansion mechanism is stopped. In addition, the present invention relates to the method of
In the electric bed equipped with a reverse extension mechanism,
Each of the reverse extension mechanisms has a linear drive mechanism, and a contact detection means is provided on a linear motion starting arm constituting the linear drive mechanism, and the contact detection means is connected to the bed body at a linear motion intermediate position. By making contact, the contact detection means is configured to be temporarily turned on, and when the contact detection means in both the linear drive mechanisms are simultaneously turned on, the normal bottom height adjustment is performed. The height adjustment operation is continued, and at the time of the extension / reverse extension operation, the current operation position is determined from the on / off state of the two contact detection means, and then the bottom is set horizontally. In response to the return command, the linear drive mechanisms are operated until the contact detection means in both linear drive mechanisms are turned on, so that the bottom is in a horizontal state at the intermediate position.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an electric bed having an extension / reverse extension mechanism provided with a bottom horizontal detecting means according to the present invention will be described with reference to the accompanying drawings. This will be described below. Electric bed 1 shown in FIG.
Is equipped with a bottom extension / reverse extension mechanism 2 and a bed frame 5 with respect to a carriage 4 having casters 3 mounted at four corners.
Is supported via an expansion / reverse expansion mechanism 2. The extension / reverse extension mechanism 2 includes a linear drive mechanism 6,
6, and these linear drive mechanisms 6, 6
And a starting arm 6b that is driven directly by a motor 6a. The distal end of the starting arm 6b is attached to the carriage 4 via support links 7 and 8, and the rear end of the motor 6a is connected to the head of the bed frame 5. And the horizontal axis 9 provided near the foot side
Attached to.

The support link 7 includes a pair of rotating arms 7a, one end of which is rotatably attached to a horizontal frame 10 of the bogie 4 which protrudes slightly above the head-side casters 3;
Lateral arm 7b integrally attached to the other end of the rotating arm 7a
And an operating arm 7c protruding in a direction substantially perpendicular to the rotating arm 7a on the intermediate side of the horizontal arm 7b. The operating arm 7c is linearly moved by the motor 6a of the linear drive mechanism 6. The leading end of the driving arm 6b to be driven is connected. The lateral arm 7b is fixed to the lateral shaft 9 near the caster 3 on the head side via a connecting member 11 at both ends.

On the other hand, the support link 8 is provided on the bogie 4 via an auxiliary member 13 fixed to a horizontal frame 12 provided near the caster 3 on the foot side and suspended so as to protrude slightly downward. A pair of rotating arms 8a having one ends rotatably mounted on the upper end of a rocking member 14 rotatably mounted;
Lateral arm 8b integrally attached to the other end of the rotating arm 8a
And an operating arm 8c protruding from the middle of the lateral arm 8b in a direction substantially perpendicular to the rotating arm 8a.
The distal end of a starting arm 6b that is driven by a motor 6a in the linear drive mechanism 6 is connected to the operating arm 8c. Further, the lateral arm 8b is fixed to the lateral shaft 9 near the caster 3 on the foot side via the connecting member 15 at both ends.

In the electric bed 1 having the above-described mechanism configuration, an angle sensor 16 is provided at a longitudinal portion of the bed frame 5, and a controller (not shown) mounted on a control box is used to extend and retract the bed. During the operation of the extension mechanism 2, when it is determined from the detection signal of the angle sensor 16 that the bottom is in a horizontal state, control is performed so as to stop the operation of the mechanism for performing the extension or reverse extension operation. Configuration. . A well-known type such as a capacitance type or a magnetic type can be applied to the angle sensor 16, and a detailed description thereof is omitted here.

The electric bed having the extension / reverse extension mechanism provided with the bottom horizontal detecting means according to the present invention is configured as described above. Next, the operation of the electric bed will be described. First, as shown in FIG. 2, from the state where the bottom, that is, the bed frame 5 is at the lowest position, when an operation command is issued to perform the expanding operation on the bottom by a hand switch (not shown) or the like, the linear drive mechanism 6, the rear end of the motor 6 a is attached to the horizontal shaft 9 on the head side of the bed frame 5, and power is supplied to the motor 6 a of the linear drive mechanism 6.
a is activated, the activation arm 6b is extended, the operation arm 8c of the support link 8 located on the foot side of the bed frame 5 is displaced, and the support link 8 is displaced about the horizontal arm 8b, The rotating arm 8a is interlocked and displaced. Initially, the swinging member 14 is pushed in from one end side of the rotating arm 8a and is displaced rightward in the figure, but gradually rises up, and the bed frame 5
The foot side is lifted, and the bottom is inclined with the head side lowered (see FIG. 3).

Here, when returning the bottom to a horizontal state,
When an operation command is issued by a hand switch (not shown) or the like to return to the horizontal position, the linear motion drive mechanism 6 on the side where the rear end of the motor 6a is attached to the horizontal shaft 9 on the foot side of the bed frame 5 The power is supplied to the motor 6a, the motor 6a is activated, the activation arm 6b is extended, and the operation arm 7c of the support link 7 located on the head side of the bed frame 5 is displaced. 7b, the rotating arm 7a is interlockingly displaced, and the head side of the bed frame 5 is lifted, while the foot side of the raised bed frame 5 is attached to the horizontal shaft 9 on the head side of the bed frame 5. Then, the motor 6a of the linear motion drive mechanism 6 on the other side is started in the reverse direction. At this time, the tilt state of the bottom is sequentially detected by the angle sensor 16 provided on the longitudinal side portion of the bed frame 5, and the controller monitors whether the bottom has reached the horizontal state. Then, when it is determined based on the detection signal from the angle sensor 16 that the bottom has reached the horizontal state, the power supply to the motor 6a in the two linear drive mechanisms 6 can be cut off to stop the operation. (See FIG. 4).

Assuming that the bottom has reached a horizontal state,
When the operation is stopped, once the hand is released from the hand switch, and this time, when an operation command is issued by the hand switch to perform the reverse extension operation, the rear end of the motor 6a is moved to the foot side of the bed frame 5. The power is supplied to the motor 6a of the linear drive mechanism 6 on the side attached to the horizontal axis 9 of the, and the motor 6a is activated, the activation arm 6b is extended, and the operation arm 7c of the support link 7 on the head side of the bed frame 5 is actuated. Is displaced, the support link 7 is displaced about the horizontal arm 7b, and the rotating arm 7a is displaced in conjunction therewith. For this reason, the head side of the bed frame 5 can be raised and the bottom can be in an inclined state with the head side lowered (see FIG. 5). From this state, when the bottom is returned to the horizontal state, the rear end of the motor 6a is supplied with power to the motor 6a of the linear drive mechanism 6 on the side attached to the horizontal shaft 9 on the head side of the bed frame 5. Then, the motor 6a is activated, the activation arm 6b is extended, and the operation arm 8c of the support link 8 located on the foot side of the bed frame 5 is displaced. The support link 8 is displaced about the horizontal arm 8b. The rotating arm 8a is interlockingly displaced and the head side of the bed frame 5 is lifted up, while the head side of the bed frame 5 that has been lifted up is attached to the horizontal shaft 9 on the foot side of the bed frame 5 for direct drive. When the motor 6a of the mechanism 6 is started in the reverse direction, it returns to the horizontal state again.

The electric bed 1 according to the present invention operates both linear drive mechanisms 6 at the same time as follows,
The lifting of the bottom can be adjusted freely (see FIGS. 6, 7 and 8). When a lifting / lowering operation command is issued by the hand switch, power is supplied to the motors 6a of both linear drive mechanisms 6,
The motor 6a is activated, the activation arm 6b is extended, and in the support link 7 located on the head side of the bed frame 5, the operation arm 7c is displaced and displaced about the horizontal arm 7b, The rotating arm 7a is displaced interlockingly. On the other hand, in the support link 8 located on the foot side of the bed frame 5, the operating arm 8c is displaced, and is displaced about the horizontal arm 8b.
Initially, the swinging member 14 is pushed in from one end side of the rotating arm 8a, and the rotating arm 8a is displaced in conjunction therewith.

Also at this time, the inclination state of the bottom is sequentially detected by the angle sensor 16 provided on the longitudinal side of the bed frame 5, and the controller monitors whether the bottom has reached the horizontal state. For this reason, even if the lifting / lowering operation command is stopped, if it is determined from the detection signal from the angle sensor 16 that the bottom is not in a horizontal state, the two linear drive mechanisms 6 are adjusted to correct the bottom to a horizontal state. In this case, the power supply to the motor 6a is continued, and it is determined that the motor 6a is in a horizontal state.

The present invention may be configured as follows as means for detecting the operating state of the bottom. That is, as shown in FIG. 9, a contact detecting means 20 (for example, a limit switch 20) is provided on the tip end side of the activation arm 6b in the linear motion drive mechanism 6, and is provided at an intermediate position of the linear motion operation range of the activation arm 6b. By contacting the limit switch 20 with the projection 21 provided on the bed frame 5, the limit switch 20 can be configured to be temporarily turned on. With this configuration, for example, when the limit switches 20 of both the linear drive mechanisms 6 are simultaneously turned on, the controller can recognize that the bed is in the horizontal state.

For example, when the height of the bottom is lower than the intermediate position, When the extension / reverse extension operation is performed, both limit switches 20 are not turned on because the activation arm 6b of the linear motion drive mechanism 6 has not reached the intermediate position of the linear motion operation range. At a position lower than the middle position
It can be determined that it is in the reverse extension state. 2.1. When one of the limit switches 20 is turned on from the state described above, it can be determined that one of the bottoms is at a position lower than the intermediate position and the other is at a position higher than the intermediate position. On the other hand, when the height of the bottom is higher than the middle position, If the extension / reverse extension operation is performed and both limit switches 20 are not turned on, the extension / reverse extension state at a position higher than the intermediate position can be determined. 4.3. When one of the limit switches 20 is turned on from the state described above, it can be determined that one of the bottoms is at a position lower than the intermediate position and the other is at a position higher than the intermediate position. From the above operation states 1 to 4, both linear drive mechanisms 6
When one of the limit switches 20 is turned on by issuing a command to return to the horizontal state, the linear drive mechanism 6 to which the limit switch 20 is attached is stopped, and the other limit switch 20 is turned on. Then, by stopping the linear drive mechanism 6, the bottom can be returned to the horizontal state at the intermediate position. Whether the height of the bottom is higher or lower than the intermediate position depends on whether the limit switch 20 at the distal end of the activation arm 6b moves to the bed frame 5 when the activation arm 6b moves linearly and passes through the intermediate position in the operation range. It is assumed that the controller memorizes that it is temporarily turned on by touching the provided convex portion 21 or that the controller is equipped with a separate detection means and recognizes it.

[0016]

As described above, according to the present invention, the bed frame can be easily adjusted to the horizontal state, and the bed user will not be laid down with the bottom inclined. Also, it is possible to judge the current operation state of the bottom, and from this state, the bottom can be returned to the horizontal state at the intermediate position, so that the upper limit for returning the bed frame to horizontal like a conventional bed is Alternatively, it is not necessary to perform the high-low operation to the lower limit, and the usability is greatly improved.

[0017]

[Brief description of the drawings]

FIG. 1 is an explanatory plan view showing an embodiment of a main part mechanism configuration of an electric bed having an extension / reverse extension mechanism provided with a bottom horizontal detection unit according to the present invention.

FIG. 2 is a partially cut-away side view showing a lowest position of a bed frame supporting a bottom and viewed along a line AA in the stretching / reverse stretching mechanism shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1 showing that the stretching is adjusted and then the bottom is returned to a horizontal state in the stretching / reverse stretching mechanism shown in FIG. 1; It is a cut side explanatory drawing.

FIG. 4 is a partially cutaway side view showing a state where the stretched state shown in FIG. 3 is returned to a horizontal state.

FIG. 5 is a cross-sectional view taken along the line AA of FIG. 1 showing that the back-extension adjustment is performed and then the bottom is returned to a horizontal state in the stretching / reverse stretching mechanism shown in FIG. 1; It is a part cut side explanatory drawing.

FIG. 6 is a partially cut-away side view of the stretching / reverse stretching mechanism shown in FIG. 1, cut along the line AA when the bed frame supporting the bottom is adjusted to the highest position; It is.

FIG. 7 is a partially cut-away side view of the extension / reverse extension mechanism shown in FIG. 1, cut along the line AA when the bed frame supporting the bottom is moved up and down to an intermediate position. It is.

FIG. 8 is a partially cut-away side view of the extension / reverse extension mechanism shown in FIG. 1, taken along line AA when the bed frame supporting the bottom is adjusted to the lowest position; It is.

9 is a schematic diagram showing an example in which a start switch of a linear drive mechanism in the extension / reverse extension mechanism shown in FIG. 1 is provided with a limit switch for use as a reference for judging an operation state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric bed 2 Extension / reverse extension mechanism 3 Caster 4 Cart 5 Bed frame 6 Linear drive mechanism 6a Motor 6b Starting arm 7, 8 Support link 7a, 8a Rotating arm 7b, 8b Side arm 7c, 8c Operating arm Reference Signs List 9 horizontal axis 10 horizontal frame 11 connecting member 12 horizontal frame 13 auxiliary member 14 swinging member 15 connecting member 16 angle sensor 20 limit switch 21 convex part

Claims (2)

(57) [Claims] 1. An electric bed provided with a bottom extension / reverse extension mechanism, wherein an angle sensor is provided on a bed body,
From the state where the bottom is extended / reversed, the bottom is horizontal
The return operation is performed by the expansion / reverse expansion mechanism described above.
The bottom is returned to a horizontal state by the angle sensor.
An electric bed having a stretching / reversing / extending mechanism provided with a bottom horizontal detecting means, wherein the operation of the stretching / reversing / extending mechanism is stopped by detecting the fact . 2. An electric bed provided with a bottom extension / reverse extension mechanism, wherein each of the extension / reverse extension mechanisms has a linear drive mechanism, and the linear drive mechanism constituting the linear drive mechanism. A contact detection means is provided on the moving starting arm, and the contact detection means is brought into contact with the bed main body at the intermediate position of the linear motion operation so that the contact detection means is temporarily turned on, and When the contact detection means in the linear drive mechanism is simultaneously turned on, it is determined that normal bottom height adjustment is being performed, and the height adjustment operation is continued, and
At the time of the reverse extension operation, the current operation position is determined from the on / off state of the two contact detection means, and then the contact detection means of both the linear drive mechanisms is issued by a command to return the bottom to the horizontal position. An electric motor having an extension / reverse extension mechanism provided with a bottom level detection means, wherein the linear drive mechanism is operated until the ON state is reached, and the bottom is brought into a horizontal state at an intermediate position. Bed.