JP2003102561A - Motor-driven hoisting and lowering type upper cabinet with contact stopping function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety of a hoisting and lowering movement of a storing cabinet in such a way that there exists no possibility of being wounded by pinching fingers of the hand, etc., in a motor-driven hoisting and lowering type upper cabinet. SOLUTION: A touch switch 5 for outputting an on signal by contacting of a part of a human body is provided at a position where there exists possibility of danger of pinching the part of the human body when the hoisting and lowering movement of the storing cabinet 1 is performed. A control circuit part 6 for receiving the on signal from this touch switch 5 and outputting a drive stopping signal to a motor 4 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric lifting type upper cabinet that is used by being attached to a wall surface of a kitchen, and more particularly, a contact stop formed so as to improve the safety during the lifting operation of a storage cabinet. The present invention relates to an electric lifting type upper cabinet with a function.

[0002]

2. Description of the Related Art Conventionally, as a cabinet of this type, a slack of a belt wound and rewound by a motor is detected by a limit switch, and the drive of the motor is stopped by a signal from the limit switch, or both sides of a storage are closed. There is a structure in which the sensor detects the rotational movement of the link member provided in the above, and sends a drive stop signal to the motor when the link member stops.

[0003]

By the way, in this type of cabinet, since the storage is automatically moved up and down by the motor, when the user mistakenly inserts his / her finger between the storage and the outer casing, the cabinet is injured. Therefore, it is desirable that the storage cabinet be formed so that it can be raised and lowered safely.

However, as described above, the conventional product has a mechanism of detecting the slack of the belt and the rotating state of the link member and stopping the driving of the motor when there is an abnormality. Only when they were caught, the drive of the motor stopped and the storage stopped. Therefore, in the case of the conventional product, it is unavoidable that the load of the storage is applied to the fingers and the like, which may cause injury to the fingers and the like, and there is a problem in safety during the lifting operation of the storage.

Further, in the case of this kind of cabinet, the belt for transmitting 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 stops the storage by detecting the slack of the belt functions when the storage is lowered, but cannot detect the slack of the belt when the storage is raised, and as a result, the fingers and the like are mistaken when rising. It was impossible to prevent a pinching accident.

The present invention has been proposed in view of such problems of the conventional products.

Therefore, a technical object of the present invention is to provide a contact stop function which is formed so that the storage can be safely moved up and down so as not to be injured by pinching fingers when the storage is moved up and down. To provide an electric lifting type upper cabinet.

[0008]

The present invention adopts the following technical means in order to solve the above problems.

That is, as shown in FIG. 1, the present invention is an electric lift type upper cabinet in which the storage case 1 is moved up and down by a motor 4, and there is a danger that a part of the human body will be caught during the raising and lowering operation of the storage case 1. A touch switch 5 that outputs an ON signal when a part of the human body touches is provided at a certain position, and a control that outputs a drive stop signal to the motor 4 in response to the ON signal from the touch switch 5 is provided. It is characterized in that it is formed by including the circuit portion 6 (claim 1).

As an electric type cabinet of the present invention, there is a type in which the storage case 1 is rotated by the motor 4 in the front-rear direction and is vertically moved up and down. Further, as a position where there is a risk of a part of the human body being caught during the raising / lowering operation of the storage case 1, for example, the storage case 1 near the boundary between the storage case 1 and the outer housing 3
Alternatively, there are the outer surface position of the outer housing 3, the outer exposed position of the link member 2 that supports the storage case 1, and the like.

As another configuration of the present invention, as shown in FIG. 3 and the like, an electric up-and-down type upper cabinet for raising and lowering the storage case 1 by a motor 4 is used. At a position where there is a risk that a part of
A touch switch 5 that outputs an ON signal when a part of the human body contacts is provided, and a control circuit unit 6 that outputs a drive stop signal of the motor 4 in response to the ON signal from the touch switch 5 and the motor 4 Motor current detector 7 that detects the drive current of the motor, a determination unit 8 that compares the rate of change of the current detected by the motor current detector 7 with a reference value, and outputs a signal if it is greater than the reference value, and this determination unit 8 and a control section 9 for outputting a drive stop signal to the motor 4 when receiving a signal from any one of the control circuit section 6 and the control circuit section 6 described above (Claim 2).

In the case of the present invention, the raising and lowering operation of the storage case 1 may be performed by rotating in the front-rear direction to move up and down or moving vertically in the vertical direction. Further, the meaning of the position where there is a risk of a part of the human body being caught during the raising / lowering operation of the storage case 1 is the same as in the case of the above example.

Therefore, in the case of these inventions, the touch switch 5 is preferably provided on the lower surface 1a of the storage case 1 (claim 3).

This is because the user of this type of cabinet usually uses the lower surface 1a of the storage case 1 and the side plate 3a of the outer casing 3.
This is because the fingers are often caught in the space formed between the bottom and the bottom plate 3b. The present invention is specifically realized by providing the sensor portion of the touch switch 5 on the entire lower surface 1a of the storage case 1 or at the position of the lower surface 1a near the side plates 3a and the bottom plate 3b of the outer housing 3. To be done.

In the case of the present invention, the touch switch 5 is preferably a capacitance type sensor (claim 4).

This is because, in this case, since the number of movable parts is small, the durability is good. Also, this type of sensor is suitable for preventing human fingers from being pinched because the electrostatic capacitance changes and an electric signal flows when a part of the human body comes into contact with it, so that the human body can be electrically grounded. Is.

Further, in the present invention, it is preferable that the touch switch 5 has flexibility and is formed in a planar shape (claim 5).

This is because this facilitates attachment to the storage case 1 and the like, and the touch surface can be formed thin over a wide area.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1 and the like, 1 is a storage box. The storage 1 is provided with link members 2 provided on both sides thereof.
Is supported by the side plate 3a of the outer housing 3. 4 is
It is a motor capable of rotating in the forward and reverse directions to rotate the storage 1 in the front-rear direction and raise and lower it. The motor 4 is arranged on the inner side of the bottom plate 3b of the outer housing 3 in this embodiment.

Reference numeral 5 is a touch switch that outputs an ON signal when a part of the human body contacts. The touch switch 5 includes an electrostatic change detector 5a that detects a change in contact current due to an increase in the amount of discharge caused by an increase in the amount of discharge when the human body touches a part of the body, and this electrostatic change detector 5a. It is formed by including a judgment circuit 5b and the like for making a touch judgment by comparing the detection value of 1 with the set value. In the electrostatic change detector 5a, a counter electrode for touch detection is formed by printing or thin film molding, and is formed in a planar shape having flexibility. Further, in this embodiment, the electrostatic change detector 5a is provided from the front side of the lower surface 1a of the storage case 1 to the lower portion of the front surface and over the entire length in the left-right direction.

Reference numeral 6 denotes a control circuit section which receives an ON signal from the touch switch 5 and outputs a drive stop signal to the motor 4. The control circuit unit 6 supplies electric power to the motor 4 as a load and stops driving the motor 4 based on a signal from the judgment circuit 5b that makes a touch judgment.

Next, the operation of the present invention will be described with reference to FIG.

When, for example, a lowering switch as an operation switch is turned on, the motor 4 is driven and the storage case 1 is lowered. Then, for example, when a finger touches the electrostatic change detector 5a, the electrostatic capacity is reduced and an electric signal is sent to the determination circuit 5b. This change in contact current is compared with the set value in the judgment circuit 5b,
When it is larger than the set value, an ON signal is sent to the control circuit unit 6. Upon receiving this signal, the control circuit unit 6 outputs a drive stop signal to the motor 4. The drive of the motor 4 is stopped by this, and as a result, the storage case 1 is stopped.

Next, a preferred embodiment of the present invention according to claim 2 will be described with reference to FIGS.

Reference numeral 1 denotes a storage case, and 2 denotes link members provided on both sides of the storage case 1 for supporting the storage case 1. The storage case 1 is supported by the side plate 3 a of the outer housing 3 by the link member 2 and is formed so as to be rotatable in the front-rear direction. Further, 4 is a motor for raising and lowering the storage 1. The motor 4 is configured to be rotatable in forward and reverse directions, and in this embodiment, it is provided on the inner side of the bottom plate 3b of the outer casing 3.

Reference numeral 5 is a touch switch that outputs an ON signal when a part of the human body contacts. The touch switch 5 includes an electrostatic change detector 5a that detects a change in current due to an increase in the amount of discharge caused by an increase in discharge area due to conduction when a part of the human body is touched, and the electrostatic change detector 5a. It is formed by including a judgment circuit 5b for making a touch judgment by comparing the detected value with a set value.

In the electrostatic change detector 5a, the counter electrode for touch detection is formed by printing or thin film molding, and is formed in a planar shape having flexibility. Further, the electrostatic change detector 5a is the lower surface 1 of the storage case 1 in this embodiment.
It is attached to the whole a and the exposed portion of the link member 2 exposed from the outer housing 3 when the storage 1 is lowered.

Reference numeral 6 denotes a control circuit section 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 used as a control unit 9 described later.
Sent to. In the present invention, the control unit 9 stops the supply of electric power to the motor 4 as a load.

A motor current detector 7 detects the drive current of the motor 4. This motor current detector 7
For example, to detect the magnetic flux according to the current value and output the detection signal of the voltage according to the magnitude of the current flowing through the wire,
It is configured to include a magnetically sensitive element and the like.

The current value detected by the motor current detector 7 is sent to the judging section 8. The determination unit 8 compares the rate of change of the current in a predetermined time with a reference value preset in a memory serving as the reference value setting unit 8a, and sends a signal to the control unit 9 when it is larger than the reference value. . In the case of this embodiment, the determination unit 8 is configured to have a function of shutting off the circuit and stopping the driving of the motor 4 when an overcurrent flows through the motor 4.

The control unit 9 is provided with 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, an ascending switch and a descending switch of the storage case 1. Also 11 is
A limit switch for detecting the lowest position of the storage 1 and a limit switch 12 for detecting the highest 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 is also configured to have a function of comparing the operating time and the operating time of the storage 1 and the motor 4 with predetermined values.

Next, the operation of the present invention will be described with reference to FIG.

When the power switch is turned on and, for example, the lowering switch is pressed, the storage case 1 is lowered by the motor 4. At this time, the fingers as a part of the human body are the electrostatic change detector 5a.
When is touched, the detected current value is compared with the set value by the determination circuit 5b, and if the detected current value is larger than the set value, a signal is sent to the control circuit unit 6. Upon receiving this signal, the control circuit unit 6 outputs a drive stop signal for the motor 4 to the control unit 9. If the detected current value is smaller than the set value, it is determined that there is no pinching accident such as fingers, and the storage case 1 continues the lowering operation. In the cabinet of the present invention of this embodiment, when the other switch, for example, the raising switch is pushed when the storage case 1 is descending during the raising / lowering operation of the storage case 1, the control unit 9 is operated.
Outputs a drive stop signal to the motor 4 to stop the storage case 1.

When an obstacle other than the fingers is caught during the raising / lowering operation of the storage case 1, the obstacle prevents the storage case 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 by the determination unit 8. If it is larger than the reference value, it is determined that there is an obstacle, and the determination unit 8 causes the control unit 9 to control the motor 4
Drive stop signal is output. The control unit 9 outputs a drive stop signal to the motor 4 when a signal from either the determination unit 8 or the control circuit unit 6 is input. This allows the motor 4
Stops driving, and the raising / lowering operation of the storage 1 stops.

[0036]

As described above, according to the present invention, a touch switch for outputting an ON signal when a part of a human body comes into contact with a predetermined position such as a storage is provided in an electric lift type upper cabinet. The configuration is such that the operation of the motor is stopped by the signal from the switch.

Therefore, in the case of the present invention, when the user touches the raising and lowering operation parts such as the storage box, the operation of the motor can be immediately stopped irrespective of the loading amount of the storage box and the operating direction of the storage box up and down. According to this, it is possible to eliminate an accident in which a finger or the like is caught between the storage case and the outer housing, and it is possible to enhance the safety during the lifting operation of the storage case.

According to a second aspect of the present invention, in an electric lift type upper cabinet, a touch switch is provided at a predetermined position of a storage or the like, and a motor current detector for detecting a drive current of a motor, and this detector. The rate of change of the detected current and the reference value are compared, and a determination section that outputs a signal when it is greater than the reference value, and a drive stop signal is output to the motor when either of the determination section and the above touch switch signal is received. And a control unit for controlling.

Therefore, in the case of the present invention, not only can the injuries of fingers and the like be prevented during the raising / lowering operation of the storage, 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. For example, even if an obstacle other than the human body is caught in the gap, the driving of the motor can be stopped, and the safety during the lifting operation of the storage can be further improved.

[Brief description of drawings]

FIG. 1 is a main part configuration diagram showing a preferred embodiment of a cabinet of the present invention.

FIG. 2 is a flow chart for explaining the operation of the above cabinet.

FIG. 3 is a main part configuration diagram showing another configuration of the cabinet of the present invention.

FIG. 4 is a block diagram of the present invention cabinet according to FIG.

5 is a flowchart for explaining the operation of the cabinet of the present invention according to FIG.

[Explanation of symbols]

1 storage 2 Link members 3 Outer case 4 motor 5 touch switch 6 Control circuit section 7 Motor current detector 8 Judgment section 9 control unit

Claims (5)

[Claims] 1. An electric lift type upper cabinet for raising and lowering a storage by a motor, wherein a part of the human body comes into contact with a position where there is a risk of a part of the human body being caught when the storage is moved up and down. The touch stop function is characterized in that a touch switch that outputs an ON signal is provided, and a control circuit unit that receives the ON signal from the touch switch and outputs a drive stop signal to the motor is formed. Electric lifting type upper cabinet. 2. An electric up-and-down type upper cabinet for raising and lowering a storage by a motor, wherein a part of the human body comes into contact with a position where there is a risk of a part of the human body being caught when the storage is moved up and down. Is provided with a touch switch that outputs an ON signal, a control circuit unit that receives an ON signal from the touch switch and outputs a drive stop signal of the motor, and a motor current detector that detects the drive current of the motor. The rate of change of the current detected by the motor current detector is compared with the reference value, and the determination section that outputs a signal when it is greater than the reference value, and the motor when receiving any of the signals from this determination section and the control circuit section An electric lifting type upper cabinet with a contact stop function, which is formed by including a control unit that outputs a drive stop signal. 3. The electric lifting upper cabinet according to claim 1, wherein the touch switch is provided on the lower surface of the storage, and the electric lifting upper cabinet has a contact stop function. 4. The electric lift-type upper cabinet according to claim 1, wherein the touch switch is a capacitance type sensor, and the touch-stop function has an electric lift-type upper cabinet. cabinet. 5. The electric up / down type upper cabinet according to claim 1, wherein the touch switch is flexible and is formed in a planar shape. Electric lifting type upper cabinet with functions.