JP4992174B2 - Electric lifting type upper cabinet with contact stop function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric lift upper cabinet that is used by being attached to a wall of a kitchen or the like, and more specifically, an electric lift upper with a contact stop function formed so as to improve safety during the lifting operation of a storage. It is about the cabinet.
[0002]
[Prior art]
Conventionally, this type of cabinet is provided with a limit switch that detects the slack of the belt that is wound and unwound by the motor, and the drive of the motor is stopped by a signal from this limit switch, or is provided on both sides of the storage. There is a configuration in which a rotation operation of a link member is detected by a sensor, and a drive stop signal is sent to a motor when the link member stops.
[0003]
[Problems to be solved by the invention]
By the way, this type of cabinet automatically raises and lowers the storage with a motor, so that if the user inserts a finger between the storage and the outer case, the storage is safe so that it will not be injured. It is desirable to be formed so that it can be moved up and down.
[0004]
However, as described above, the conventional product detects the slack of the belt and the rotation state of the link member, and if there is an abnormality, it stops the drive of the motor. The drive of the motor was stopped, and the storage was stopped. Therefore, in the case of the conventional product, it is inevitable that the load on the storage case is applied to the fingers and the like, so there is a possibility that the fingers and the like may be injured, and there is a problem in safety during the raising and lowering operation of the storage case.
[0005]
In the case of this type of cabinet, the belt that transmits the movement of the motor to the storage is usually tensioned by the load of the storage when the storage is raised. Therefore, the conventional product with a structure that detects the slack of the belt and stops the storage can function when the storage is lowered, but cannot detect the slack of the belt when it rises, and as a result, it passes over the fingers when it rises. It was not possible to prevent accidents between them.
[0006]
The present invention has been proposed in view of such problems of conventional products.
[0007]
Therefore, the technical problem of the present invention is that when the storage is moved up and down, an electric lift with a contact stop function formed so that the storage can be safely moved up and down so as not to be injured with fingers or the like sandwiched. It is to provide a type upper cabinet.
[0008]
[Means for Solving the Problems]
The present invention employs the following technical means in order to solve the above problems.
[0009]
That is, as shown in FIG. 1, the present invention is an electric hoisting type upper cabinet that raises and lowers the storage 1 with a motor 4, and there is a risk that a part of a human body may be caught during the raising and lowering operation of the storage 1. A touch switch 5 that outputs an ON signal when a part of a human body comes into contact with the position is provided, and a control circuit unit 6 that outputs an ON signal from the touch switch 5 and outputs a drive stop signal of the motor 4; A motor current detector 7 for detecting the drive current of the motor 4; a rate of change detected by the motor current detector 7 is compared with a reference value; A control unit 9 that outputs a drive stop signal to the motor 4 when receiving a signal from the determination unit 8 and the control circuit unit 6 is formed (claim 1).
[0010]
Here, as the electric cabinet of the present invention, there is a type in which the storage case 1 is rotated in the front-rear direction by the motor 4 or vertically moved up and down. Further, as a position where there is a risk that a part of the human body is caught during the raising and lowering operation of the storage 1, for example, the outer surface position of the storage 1 or the outer case 3 near the boundary between the storage 1 and the outer case 3, There is an externally exposed position of the link member 2 that supports the storage 1.
[0011]
Thus, the present invention provides an electrostatic change detector 5a for detecting a change in current due to an increase in discharge amount due to an increase in the conduction and discharge area when a touch switch 5 touches a part of a human body, and the static change detector 5a. It is preferable to include a determination circuit 5b that makes a touch determination by comparing the detection value of the electric change detector 5a with a set value (claim 2).
[0012]
Further, in this case, in the present invention, it is preferable that the electrostatic change detector 5a is attached to the exposed portion of the link member 2 exposed from the outer casing 3 when the storage case 1 is lowered (Claim 3). .
[0013]
In the present invention, it is preferable that the determination unit 8 has a function of interrupting the circuit and stopping the driving of the motor 4 when an overcurrent flows through the motor 4 (claim 4).
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of the invention will be described with reference to the accompanying drawings.
[0015]
Reference numeral 1 denotes a storage, and reference numeral 2 denotes link members provided on both sides of the storage 1 in order to support the storage 1. The storage 1 is supported by the side plate 3a of the outer casing 3 by the link member 2, and is formed to be rotatable in the front-rear direction. Reference numeral 4 denotes a motor for moving the storage 1 up and down. The motor 4 is configured to be rotatable forward and backward. In this embodiment, the motor 4 is provided on the back side of the bottom plate 3b of the outer casing 3.
[0016]
Reference numeral 5 denotes a touch switch that outputs an ON signal when a part of the human body comes into contact therewith. The touch switch 5 includes an electrostatic change detector 5a that detects a change in current due to an increase in discharge amount due to an increase in conduction and discharge area when a part of the human body touches, and the electrostatic change detector 5a. A judgment circuit 5b for making a touch judgment by comparing the detected value with a set value is provided.
[0017]
In the electrostatic change detector 5a, the counter electrode for touch detection is formed by printing or thin film molding, and has a flexible surface shape. In this embodiment, the electrostatic change detector 5a is attached to the entire lower surface 1a of the storage case 1 and the exposed portion of the link member 2 exposed from the outer casing 3 when the storage case 1 is lowered. .
[0018]
Reference numeral 6 denotes a control circuit unit that receives an ON signal of the touch switch 5 and outputs a drive stop signal of the motor 4. The output signal of the control circuit unit 6 is sent to the control unit 9 described later. In the present invention, the supply of electric power to the motor 4 as a load is stopped by the control unit 9.
[0019]
A motor current detector 7 detects the drive current of the motor 4. The motor current detector 7 is configured to include a magnetically sensitive element or the like so as to detect a magnetic flux corresponding to the current value and output a detection signal of a voltage corresponding to the magnitude of the current flowing through the electric wire.
[0020]
The current value detected by the motor current detector 7 is sent to the determination unit 8. The determination unit 8 compares the rate of change of current during a predetermined time with a reference value preset in a memory serving as a reference value setting unit 8a, and sends a signal to the control unit 9 if the reference value is larger than the reference value. . In the case of this embodiment, the determination unit 8 is configured to have a function of interrupting the circuit and stopping the driving of the motor 4 when an overcurrent flows through the motor 4.
[0021]
The control unit 9 includes an OR circuit or the like so as to output a drive stop signal to the motor 4 when receiving a signal from either the determination unit 8 or the touch switch 5. Reference numeral 10 denotes an operation unit including a power switch, a raising switch, a lowering switch, and the like of the storage 1. Further, 11 is a limit switch for detecting the lowest lowered position of the storage 1 and 12 is a limit switch for detecting the highest raised position. These external devices are electrically connected to the control unit 9, and the control unit 9 is configured to output a control signal to the motor 4 when receiving a signal from each external device. In this embodiment, the control unit 9 has a function of comparing and determining the operation time and operation time of the storage 1 and the motor 4 with predetermined values.
[0022]
Then the effect of the present invention will be described with reference to FIG. 3 or the like.
[0023]
When the power switch is turned on and, for example, the lowering switch is pressed, the storage 1 is lowered by the motor 4. At this time, when a finger as a part of the human body touches the electrostatic change detector 5a, the detection current value is compared with the set value by the determination circuit 5b, and when the detected current value is larger than the set value, the signal is transmitted to the control circuit unit. 6 is sent. Upon receiving this signal, the control circuit unit 6 outputs a drive stop signal for the motor 4 to the control unit 9. On the other hand, if the detected current value is smaller than the set value, it is determined that there is no accident of pinching of fingers and the like, and the storage 1 continues to move down. In the cabinet of the present invention of this embodiment, when the other switch, for example, the raising switch is pressed when the storage 1 is lowered during the raising / lowering operation of the storage 1, a drive stop signal is output from the control unit 9 to the motor 4. The storage 1 is stopped.
[0024]
Thus, when an obstacle other than a finger is caught while the storage 1 is moving up and down, the obstacle prevents the storage 1 from descending, so that the drive current of the motor 4 changes. This change in current is detected by the motor current detector 7 and compared with a reference value in the determination unit 8. If it is greater than the reference value, it is determined that there is an obstacle, and a drive stop signal for the motor 4 is output from the determination unit 8 to the control unit 9. The control unit 9 outputs a drive stop signal to the motor 4 when any signal from the determination unit 8 or the control circuit unit 6 is input. Thereby, the motor 4 stops driving, and the raising / lowering operation of the storage 1 is stopped.
[0025]
【Effect of the invention】
As described above, according to the present invention, in the electric up-and-down type upper cabinet, the touch switch is provided at a predetermined position such as a storage, and the motor current detector that detects the drive current of the motor, and the current detected by the detector are detected. A determination unit that compares the rate of change with a reference value and outputs a signal if greater than the reference value; and a control unit that outputs a drive stop signal to the motor when receiving a signal from the determination unit and the touch switch. It is equipped with.
[0026]
Therefore, in the case of the present invention, not only can the fingers be prevented from being injured during the raising / lowering operation of the storage case, but the motor can be controlled by both the contact current due to the contact of the human body and the detection of the motor current. Even if the obstacle is caught in the gap, the driving of the motor can be stopped, and the safety during the raising / lowering operation of the storage can be further improved.
[Brief description of the drawings]
FIG. 1 is a main part configuration diagram showing a preferred embodiment of a cabinet of the present invention.
FIG. 2 is a block diagram of the cabinet .
FIG. 3 is a flowchart for explaining the operation of the cabinet .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Storage 2 Link member 3 Outer housing 4 Motor 5 Touch switch 6 Control circuit part 7 Motor current detector 8 Judgment part 9 Control part

Claims (4)

  An electric lift type upper cabinet that raises and lowers the storage with a motor, and outputs an ON signal when a part of the human body comes in contact with a position where there is a risk that the human body may be caught during the above-mentioned vertical movement of the storage A touch switch that receives an ON signal from the touch switch and outputs a motor drive stop signal, a motor current detector that detects the motor drive current, and the motor current detector The rate of change of the detected current is compared with a reference value, and if it is larger than the reference value, a determination unit that outputs a signal, and a signal for stopping either of the determination unit and the control circuit unit is received, a drive stop signal is output to the motor And an electric lifting type upper cabinet with a contact stop function. The electric up-and-down type upper cabinet according to claim 1 , wherein the touch switch detects a change in current due to an increase in a discharge amount due to an increase in conduction and discharge area when a part of a human body is touched. And an electric lifting type upper cabinet with a contact stop function, characterized in that it is provided with a judgment circuit for making a touch judgment by comparing a detection value of the electrostatic change detector with a set value . The electric lifting type upper cabinet according to claim 2, wherein the electrostatic change detector is attached to an exposed portion of the link member exposed from the outer casing when the storage is lowered. Electric lifting upper cabinet with stop function. 4. The electric lifting type upper cabinet according to claim 1, wherein the determination unit is configured to have a function of interrupting the circuit and stopping the driving of the motor when an overcurrent flows through the motor. Electric lifting type upper cabinet with contact stop function.

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