JPH09192175A - Bed with pinch prevention function and operation control method thereof - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To quickly eliminate an entrapped state of an obstacle, a child, or the like when an obstacle, a child, or the like is trapped under the floor. SOLUTION: During operation of returning the bottom to a flat surface,
A belt-shaped pressure sensor 4 provided at the edge of the bottom detects a signal indicating that an obstacle is present, so that power supply to the motor is cut off to stop the bottom lowering operation.
By canceling the bottom lowering operation, power is supplied to the motor to start reverse rotation, the bottom is raised in reverse, and when the detection signal disappears, power supply to the motor is cut off and the bottom operation is stopped. The configuration is Further, the band-shaped pressure sensor 4 is used as a means for raising the bottom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed provided with a floor raising / lowering mechanism, which can quickly remove an obstacle or a child from being caught under the floor when an obstacle or a child is caught under the floor. The present invention relates to a bed provided with a pinch prevention function and an operation control method thereof.

[0002]

2. Description of the Related Art Recently, not only hospitals but also home beds have been widely used which are provided with an electric floor undulating mechanism. The floor undulation mechanism is an operation signal input means (remote control switch) arranged on a floor which is easily accessible by the patient.
This allows the patient to operate the floor to a desired inclined state. By the way, when operating the remote control switch to return the floor to the flat state from the inclined state, if there is an obstacle between the floor and the bed frame, the operation of the floor is obstructed by the obstacle. In this case, if the drive mechanism is kept operating, an excessive load is applied to the drive mechanism such as a motor, a power transmission mechanism, and a speed change mechanism, which may cause breakage. Also, when a child enters between the floor and the bed frame, and there is no caregiver, if the patient operates the remote control switch without noticing it, it is very dangerous. So, conventionally,
For example, a plate body serving as a safety panel is provided on a bed frame below the floor of the bed, and a load detection means is provided on the safety panel. When the floor falls down, it is assumed that a child or an obstacle is on the safety panel. Then, a detection signal indicating that there is a child, an obstacle, or the like is given to the drive control means by the load detection means, and based on this signal, means for preventing the floor from falling down and raising the floor in the reverse direction is adopted (actual square root). No. 7-30799). Further, in order to prevent trapping, a detection sensor and a forced lowering switch are provided to have a function considering safety.

[0003]

However, such means can prevent the danger, but the structure is such that when a foreign object is detected at the time of lowering the back, the floor is woken up in the opposite direction. In order to prevent this, a control structure in which a detection sensor and a forced lowering switch are separately provided is employed. Therefore, it is inevitable that the circuit, the control structure, that is, the drive control means become complicated, and there is a problem in cost.
The present invention has been made in order to improve such a point, and instead of adding a new control circuit, obstacle detection is performed in parallel with operation signal input means for a control unit of a floor unit which is normally used. Means are provided so that when an obstacle or a child is caught under the floor during the lowering operation of the floor, the state of being caught by the obstacle or the child can be quickly eliminated and the obstacle detection means is provided. It is an object of the present invention to provide a bed provided with a pinching prevention function and a method of controlling the operation thereof, which provide a more natural operability by allowing the floor section to be raised by the above method.

[0004]

In order to solve the above-mentioned problems, the present invention provides an operation signal input means for operating the undulating motion of a floor in a bed provided with an electric floor undulating mechanism. At the same time, an obstacle detection means is provided on the surface of the floor portion that is undulated by the electric floor undulation mechanism, facing the bed frame, and the input signals from these operation signal input means and obstacle detection means are taken in, and the electric floor The electric floor raising / lowering mechanism is stopped by receiving a detection signal from the obstacle detecting means at the time of an operation for returning the floor to a flat state, which has a control unit for giving an operation control signal to the section raising / lowering mechanism. I decided to do it. In the above-described configuration, when the floor portion is being lowered to be flat, a detection signal indicating that there is an obstacle by the obstacle detection means is provided on the surface side of the floor portion facing the bed frame, By stopping the lowering operation and canceling the lowering operation of the floor portion by the operation signal input means, the floor portion is raised in reverse, and the operation of the floor portion is stopped when the detection signal indicating that there is an obstacle disappears. The method to do was adopted. Further, a method of applying an operation control signal to the electric floor undulating mechanism to raise the floor by pushing the obstacle detecting means on the surface of the floor facing the bed frame is adopted.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a bed having an anti-jamming function and an operation control method thereof according to the present invention will be described with reference to the attached drawings, with reference to typical embodiments. FIG. 1 shows a bed 1 having a pinch prevention function. This bed 1 is provided with an electric floor undulating mechanism (not shown), and is provided on a bed frame 2 with an electric floor undulating mechanism (back raising mechanism). , A raised leg mechanism), and a divided bottom 3 is provided. The bottom 3 is divided into a back bottom 3a corresponding to the back, a waist bottom 3b corresponding to the waist, a knee bottom 3c corresponding to the thigh, and a leg bottom 3d corresponding to the shin to the feet. Of these bottoms 3, the waist bottom 3b is fixedly supported by the bed frame 2, and the undulating operation is the back bottom 3a, the knee bottom 3c, and the leg bottom 3d. Along the edge of the surface of the back bottom 3a, the knee bottom 3c and the leg bottom 3d facing the bed frame 2, a belt-shaped pressing sensor 4 as an obstacle detecting means is provided. The detection signals from the belt-shaped pressing sensors 4 are taken in by a controller of the electric floor undulating mechanism, that is, a controller (described later).

Next, FIG. 2 is a block diagram showing an operation control configuration of the bed 1 and will be described below. In this bed 1, a remote control switch 5 (hereinafter, referred to as an operation signal input means) disposed on the bottom 3 and serving as an operation signal input means for the electric floor undulating mechanism.
An operation signal from the hand switch 5) and a detection signal from the above-mentioned band-shaped pressing sensor 4 are configured to be taken into the controller 6 of the electric floor undulating mechanism, and the controller 6 constitutes the electric floor undulating mechanism. The power supply control is performed to the motor 7 for lifting, the motor 8 for raising the leg, and further, for example, the motor 9 for raising and lowering the bed frame 2. The controller 6 has a well-known configuration, and details thereof are not shown. However, when there is an input signal from the hand switch 5 and the band-shaped pressing sensor 4, it is determined that there is a simultaneous input, and the back-lifting motor 7, the leg There is a control procedure for cutting off the power supply to the raising motor 8 and the elevating motor 9.

In the controller 6, the back bottom 3
a, or during the lowering operation to flatten the knee bottom 3c and the leg bottom 3d, it is determined that there is an obstacle by the band-shaped pressing sensor 4 provided at the edge of the back bottom 3a or the knee bottom 3c and the leg bottom 3d. In response to the detected signal, the power supply to the back-lifting motor 7, or the leg-lifting motor 8 and the lifting / lowering motor 9 is cut off, and the lowering operation of the back bottom 3a or the knee bottom 3c and the leg bottom 3d is stopped. Back 5a, knee bottom 3c by switch 5
By releasing the lowering operation of the leg bottom 3d, power is supplied to the back-lifting motor 7, or the leg-lifting motor 8 and the lifting / lowering motor 9 to start the reverse rotation, so that the back bottom 3a, the knee bottom 3c, and the leg bottom 3d. Is reversed, and when the detection signal indicating that there is an obstacle from the belt-shaped pressing sensor 4 disappears, the power supply to the back lifting motor 7 or the leg lifting motor 8 and the lifting motor 9 is cut off. The operation of the back bottom 3a or the knee bottom 3c and the leg bottom 3d is stopped.

Further, in the controller 6, the belt-shaped pressing sensor 4 provided at the edge of the back bottom 3a or the knee bottom 3c and the leg bottom 3d has the back bottom 3a or the knee bottom 3c and the leg bottom 3d raised midway. In this state, the belt-shaped pressure sensor 4 is detected by pressing it with a hand or the like, that is, the input signal is detected as a back-up command signal or a knee-up signal, and the back-up motor 7 or the leg is lifted. Power is supplied to the raising motor 8 and the lifting / lowering motor 9, so that the back bottom 3a, the knee bottom 3c and the leg bottom 3d are raised.

As shown in FIG. 3, in the bed having the pinch prevention function having the above-described structure, the back bottom 3a, or the knee bottom 3c and the leg bottom 3d are normally moved from the inclined state by operating the hand switch 5. When the obstacle is sandwiched below the back bottom 3a or the knee bottom 3c and the leg bottom 3d when returning to the flat state, the obstacle hits the belt-shaped pressing sensor 4, and the obstacle is sandwiched. A signal is issued to the controller 6, and the controller 6
Based on the bottom-down signal from the hand switch 5 and the ON signal, it is determined that there has been simultaneous input, that is, simultaneous depression, and power to the back-lifting motor 7 or the leg-lifting motor 8 and the lifting / lowering motor 9 is cut off. The operation of the bottom 3a or the knee bottom 3c and the leg bottom 3d can be stopped. In such a state, the operator can recognize that something has been caught in the bottom, and if the bottom lowering command by the hand switch 5 is interrupted, the controller 6 will be in an input state in which only the ON signal from the belt-shaped pressing sensor 4 is input. Therefore, the controller 6 supplies the back signal as the bottom-up signal to the back-lifting motor 7 or the leg-lifting motor 8 and the lifting / lowering motor 9 so as to start the motor in the reverse direction, so that the back bottom 3a, the knee bottom 3c and The leg bottom 3d can be raised in reverse. Then, the band-shaped pressing sensor 4
When the ON signal indicating that there is an obstacle from
That is, when the bottom separates from the obstacle, the power supply to the back-lifting motor 7, or the leg-lifting motor 8 and the elevating motor 9 is cut off, and the operation of the back bottom 3a or the knee bottom 3c and the leg bottom 3d is performed. Can be stopped. Thus, the obstacle can be removed without difficulty, and the bottom operation using the hand switch 5 becomes possible again. Since the controller 6 is configured to recognize the ON signal from the belt-shaped pressing sensor 4 as having an input to raise the bottom, the controller 6 does not need to use the hand switch 5 but also the back bottom 3a or the knee bottom 3c and the leg bottom 3c. If the 3d band-shaped pressure sensor 4 is directly lifted while being pressed, the bottom can be tilted to the position at which it is desired to be lifted, so that the bottom can be raised and lowered with a more natural feeling, and fine and easy to use. Beds can be provided.

[0010]

As described above, according to the present invention, since the obstacle detecting means is simply connected in parallel to the remote control switch for giving an operation signal to the controller of the electric hoist mechanism, the cost is reduced. Is no problem,
Since the obstacle detecting means can be used like ordinary operating means, the bottom can be raised and lowered in a more natural manner, and a bed that is fine and easy to use can be provided.

[0011]

[Brief description of the drawings]

FIG. 1 is an external perspective explanatory view of a bed provided with a pinching prevention function according to the present invention.

FIG. 2 is a block diagram for implementing a pinch prevention function provided in the bed shown in FIG. 1;

FIG. 3 is a time chart for explaining an anti-jamming function according to the present invention.

[Explanation of symbols]

 1 Bed 2 Bed Frame 3 Bottom 3a Back Bottom 3b Waist Bottom 3c Knee Bottom 3d Leg Bottom 4 Belt Press Sensor 5 Hand Switch 6 Controller 7 Back Lifting Motor 8 Leg Lifting Motor 9 Lifting Motor

Claims (3)

[Claims] 1. A bed provided with an electric floor undulating mechanism, further comprising operation signal input means for operating the undulating motion of the floor, and a bed frame of the floor undulating by the electric floor undulating mechanism. An obstacle detecting means on a surface facing the floor, and a control section for receiving an input signal from the operation signal inputting means and the obstacle detecting means to give an operation control signal to the electric floor undulating mechanism. A bed having a pinching prevention function, characterized in that the electric floor raising / lowering mechanism is stopped by receiving a detection signal from the obstacle detecting means during an operation of returning the section to a flat state. 2. In the bed, when a lowering operation is performed to flatten the floor, a detection signal indicating that an obstacle is present by the obstacle detection means is provided on the surface of the floor facing the bed frame. By stopping the lowering operation of the floor portion and canceling the lowering operation of the floor portion by the operation signal input means, the floor portion is raised in the reverse direction, and when the detection signal indicating that the obstacle is present disappears, the floor portion is removed. The operation control method for a bed having a trapping prevention function according to claim 1, wherein the operation of the bed is stopped. 3. An operation control signal is applied to the electric floor undulating mechanism for raising the floor by pressing the obstacle detecting means on the surface of the floor facing the bed frame. Item 2. A bed motion control method having a trapping prevention function according to Item 1.