JP5606195B2 - Switchgear - Google Patents

Description

  The present invention relates to an opening / closing device in which an object on the opening / closing body closing direction side is detected by a seat plate sensing portion, and more particularly to an opening / closing device suitable as a shutter device.

Conventionally, this type of opening and closing device is provided with a seat plate sensing unit that senses and contacts an object closer to the closing direction than the opening and closing body at the closing direction end of the opening and closing body, and the seat plate sensing unit during the closing operation of the opening and closing body When touching an obstacle or the like, the opening / closing body is reversed by a predetermined amount (hereinafter referred to as a touch-up operation).
In such an opening / closing device, for example, as described in Patent Document 1, when the opening / closing body is fully closed, the touch-up operation prevents a gap from being generated between the opening / closing body and the floor surface. When the opening / closing body during the closing operation reaches a position before the fully closed position slightly above the floor or the like, the seat plate sensing unit is invalidated, and it is fully closed when the closing operation is performed for a preset timer time. As a result, the closing operation is stopped.
Further, in the opening / closing device, when the opening / closing body stops in the closing direction side from the fully closed position, the closing operation switch is operated and the overrun state (the closing operation of the opening / closing body continues even after the fully closing operation). In order to prevent an excessive load from being applied to the opening / closing body or a state in which the opening / closing body is reversely wound around the winding shaft), the operation by the closing operation switch is ignored.

However, according to the prior art, when the opening / closing body stops on the closing direction side with respect to the fully closed position, a slight gap is formed between the closing direction end of the opening / closing body and the floor surface. However, even if the closing operation switch is operated to close the gap, the opening / closing body does not close.
In order to close the gap, the opening / closing body is once opened by operating the opening operation switch until it is above the position before full closing, and then the opening / closing body is closed by operating the closing operation switch. It is necessary to perform the closing operation from the front position for the timer time, and the operation is troublesome.

Japanese Patent Laid-Open No. 10-306672

  This invention makes it an example of a subject to cope with such a problem. That is, when the opening / closing body is stopped closer to the closing direction than the fully closed position in the opening / closing device that disables the seat plate sensing unit when the opening / closing body is closer to the closing direction than the fully closed position. It is an object of the present invention to allow the opening / closing body to be closed to the fully closed position and to easily perform an operation for performing the closing operation.

  In order to achieve such an object, the technical means according to the present invention includes at least the following configuration.

  An opening / closing body that performs a closing operation by sliding an end portion in the closing direction, a position detection unit that detects that the closing direction end portion of the opening / closing body is within a predetermined range before full closing, and a closure of the opening / closing body A seat plate sensing unit that senses that the direction end has contacted an object on the closing direction side, and a control unit that controls the opening and closing body, and when there is a sensing signal from the position detection unit before all closing The opening and closing device is adapted to invalidate the seat plate sensing unit, wherein the control unit is in a state in which a sensing signal is input by the position detection unit before all closing and the opening and closing body is stopped. On the condition that the input of the closing command is awaited, and there is an input of the closing command, the counting of the time or distance by the closing operation counting means is started and the closing operation of the opening / closing body is started, and the closing operation counting means Count is predetermined On condition that reached, characterized by stopping the closing movement of the closing body.

By having such characteristics, the present invention has the following effects.
Even when the opening / closing body is stopped in a state where the closing direction end of the opening / closing body is within a predetermined range before full closing, the opening / closing body is easily closed to the fully closed position only by a closing command. be able to.

It is a front view which shows an example of the switchgear concerning this invention. It is a flowchart which shows the example of control when an opening-and-closing body exists in the closing direction side rather than a fully closed position. It is a flowchart which shows the other example of control at the time of an opening-and-closing body being in a closing direction side rather than a fully closed position.

  The opening / closing device according to the present invention is particularly effective when applied to a form (for example, a shutter device) in which the opening / closing body is wound and stored on a winding shaft, but the opening / closing body is wound around the winding shaft. It is also possible to apply to the form (for example, an overhead door apparatus etc.) which accommodates in the open direction side without taking.

  Examples of the form of the opening / closing body include, for example, a sheet-like body, a net-like body, a plurality of slats and pipes, or a form in which a panel is continuously provided in the opening / closing direction, and the above-described sheet-like body, net-like body, The form etc. which combine a slat, a pipe, and a panel suitably are mentioned.

  In addition, the position detection unit before full closing includes, for example, a closing direction end portion of the opening / closing body at a predetermined position before full closing based on a rotation amount of a driving source for closing the opening / closing body, a winding shaft for feeding the opening / closing body, or the like. It is configured to detect that it is within a range, or the opening / closing body provided in a fixed part such as a guide rail and within the predetermined range is a contact-type or non-contact-type sensor (for example, a micro switch or a proximity switch) Etc.) is included.

  The closing command may be a signal issued by an operation of, for example, an operation switch or a remote controller, and is preferably a signal issued when the push button switch is pressed as a preferable mode with particularly good operability.

In a preferred embodiment according to the present invention, the predetermined value is a time or a distance required for a closing operation until the closing direction end of the opening / closing body reaches the fully closed position from the opening direction end of the predetermined range. Is set.
According to this aspect, it is more effective that an excessive load is applied to the opening / closing body and a mechanism (for example, a winding device) for feeding out the opening / closing body by closing the opening / closing body even after sitting. Can be prevented.

In a further embodiment, the condition for stopping the closing operation of the opening / closing body is that the count by the closing operation counting means has reached a predetermined value or that the input of the closing command has not been continued.
According to this aspect, the opening / closing body when the closing operation is performed can be stopped even when the input of the closing command is not continued. Therefore, for example, while the push button switch is kept pressed, the opening / closing body is closed, and the closing operation is stopped by an operation of releasing the hand from the push button switch.

In another form, the condition for stopping the closing operation of the opening / closing body is that the count by the closing operation counting means reaches a predetermined value, the input of the closing command is not continued, or the opening / closing body The load of the drive source that performs the closing operation exceeds a predetermined value.
According to this aspect, the opening / closing body when the closing operation is performed can be stopped also when the load of the drive source exceeds a predetermined value. Therefore, even when the opening / closing body during the closing operation is seated or abuts against an obstacle, the closing operation of the opening / closing body can be stopped by the load increase due to the seating or contact.

In a further aspect, the control unit is configured to return the process to a state of waiting for an input of the closing command on the condition that no closing command is input after the closing operation of the opening / closing body is stopped, and the return There is a limit on the number of times.
According to this aspect, the closing command is repeatedly issued, so that the opening / closing body tries to repeat the closing operation even after being seated, and an excessive load is applied to the opening / closing body and a mechanism (for example, a winding device) for feeding the opening / closing body by the repetition. You can prevent it from joining.

  In the present embodiment, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in the closed state. The “opening / closing body width direction” means a direction orthogonal to the opening / closing direction of the opening / closing body and not the thickness direction of the opening / closing body. In addition, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body slides to open / close an opening or a space.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The opening / closing device includes an opening / closing body 10 that opens and closes by sliding an end portion in the closing direction, a guide rail 20 that surrounds and guides the end portion of the opening / closing body 10 in the width direction (left-right direction in FIG. 1), And a winding device 30 that winds and unwinds the opening / closing body 10 to open and close the opening / closing body 10, and has a feature in control when the closing direction end of the opening / closing body 10 is within a predetermined range H before full closing. Yes.

  The opening / closing body 10 constitutes the opening / closing body main body 11 by connecting a plurality of so-called slats 11a formed by bending a horizontally-long substantially rectangular metal plate so as to rotate between the vertically adjacent slats 11a, 11a. The movable seat plate 12 is connected to the end of the opening / closing body 11 in the closing direction (the lower end in the illustrated example).

The movable seat plate 12 is a member that extends over substantially the entire length in the opening / closing body width direction, and projects downward from the lower end of the opening / closing body body 11. The movable seat plate 12 moves freely by a predetermined amount in the opening / closing body opening / closing direction (vertical direction in FIG. 1) relative to the opening / closing body main body 11.
For example, the movable seat plate 12 may be moved in the vertical direction by engaging the upper end portion of the movable seat plate 12 with the lower end portion of the opening / closing body main body 11 so as to slide a predetermined amount in the vertical direction.

Between the movable seat 12 and the opening / closing body 11, a sensor (such as a micro switch or a proximity switch not shown) that senses that the movable seat 12 has moved upward relative to the opening / closing body 11. ) Is provided.
The movable seat plate 12 and the sensor function as a seat plate sensing unit that senses that the closing direction end of the opening / closing body 10 is in contact with an object on the closing direction side. That is, when the movable seat plate 12 moves in the opening direction relative to the opening / closing body main body 11 due to the contact of an object with the end of the opening / closing body 10 in the closing direction, the contact of the sensor is turned on. Further, when the movable seat plate 12 moves in the closing direction relative to the opening / closing body main body 11 by removing the object or the like, the contact of the sensor is turned off.
In this configuration, the contact point of the sensor may be turned on when the movable seat plate 12 moves the entire movable range of the movable seat plate 12, or when the movable seat plate 12 moves the movable range by a predetermined percentage. It is good also as an aspect which a contact turns on.

  The guide rail 20 is a member having a substantially U-shaped cross section that surrounds an end of the opening / closing body 10 in the width direction, and a contact target portion p (for example, a floor surface, the ground, or a frame member) seated by the opening / closing body 10. Etc.) and the winding device 30.

  In addition, the winding device 30 includes a winding shaft 32 that winds and unwinds the opening / closing body 10 in a storage case 31 in which an opening for allowing the opening / closing body 10 to appear and retract on the lower side, and the winding shaft. An opening / closing device 40 that drives and rotates 32, and a control unit 50 that controls the opening / closing body 10 by controlling the opening / closing device 40.

  The switch 40 is a direct-current or alternating-current electric motor serving as a drive source for closing the open / close body 10, and power transmission for adjusting the rotational force of the electric motor to an appropriate rotational speed and torque and transmitting it to the winding shaft 32. A mechanism (specifically, a gear or the like) and a counter-type limit switch 41 that outputs a contact signal when the rotation amount of the output shaft of the power transmission mechanism reaches a predetermined value are provided.

The counter-type limit switch 41 is a well-known mechanism that combines a counter mechanism that mechanically counts the rotation amount of the output shaft and a micro switch that operates when the count value of the counter mechanism reaches a predetermined value. It is. The counter-type limit switch 41 is a position detection unit before full closure that senses that the closing direction end of the opening / closing body 10 (more specifically, the lower end of the movable seat 12) is within a predetermined range H before full closure. Function as.
That is, when the closing direction end of the opening / closing body 10 enters the predetermined range H before the full closing by the closing operation, the contact of the counter type limit switch 41 is turned on. Further, when the closing direction end of the opening / closing body 10 moves to the opening direction side (upward side in the illustrated example) from the predetermined range H before full closing by the opening operation, the contact of the counter type limit switch 41 is turned off. Become.

Further, the control unit 50 electronically processes electrical signals input from the position detection unit before closing, the seat plate detection unit, the operation unit 51, and the like based on a program, and according to the processing result. The control circuit supplies the control power to the switch 40 to cause the switch 40 to rotate forward, reverse, stop, etc.
The controller 50 is preferably configured by a programmed logic circuit used in, for example, a microcomputer or a programmable controller so that the circuit configuration, setting values, and the like can be easily changed in accordance with the field conditions. A circuit using a relay circuit or other electronic circuit can also be used.

  The operation unit 51 is a switch box having three push button switches of an open button 51a, a stop button 51b, and a close button 51c, and is electrically wired so as to input a contact signal of each button to the control unit 50. .

  Next, an example of the control operation for the switchgear having the above-described configuration will be described in detail based on the flowcharts shown in FIGS.

FIG. 2 shows an example of control when processing is started from a stop state where a detection signal is input by the position detection unit before the all-closed position (that is, a state where the closing direction end of the opening / closing body 10 is stopped within a predetermined range H). .
The control unit 50 disables the seat board sensing unit when the sensing signal is input by the position detection unit before all the hands are closed (the flowchart is omitted).

  In the stop state, first, in step 1, a closing command input waiting state, that is, a state waiting for the closing button 51c to be pressed is entered. Then, when there is an input of a closing command (pressing operation of the closing button 51c), the process proceeds to the next step 2.

In step 2, counting of a predetermined value (predetermined time) by the closing operation counting means is started. For example, the closing operation counting means may use a timer function on the control circuit of the control unit 50 or a timer relay provided separately.
The predetermined value (predetermined time) is set to a time required for the closing operation of the opening / closing body 10 from the end on the opening direction side of the predetermined range H to the fully closed position. According to a preferred example of the form, it is set to about 2 seconds.

  In the next step 3, the closing operation of the opening / closing body 10 is started by driving the opening / closing device 40.

Further, in the next step 4, it is determined whether or not the closing command is continued. If the closing command is continued, the process proceeds to the next step 5, otherwise, the process jumps to step 6. To do.
That is, according to this step 4, when the hand is not released from the close button 51c and the close button 51c is kept pressed, the close command is continued, and the process proceeds to step 5. It is done. If the hand is released from the close button 51c, the close command is not continued, and the process jumps to step 6.

  In step 5, it is determined whether or not the count by the closing operation counting means has reached a predetermined value (2 seconds in the illustrated example), and if it has reached, the process proceeds to the next step 6; If so, the process returns to step 4.

  In step 6, the closing operation of the opening / closing body 10 is stopped by stopping the opening / closing machine 40.

  In step 7, the process waits for the closing command to be input, and returns to step 1 if the closing command is lost. That is, according to step 7, the control unit 50 waits for the hand to be released from the close button 51c, and returns the process to step 1 when the hand is released.

Thus, according to the flowchart, for example, when an operation of continuously pressing the close button 51c is performed, the closing operation of the opening / closing body 10 is continued for a predetermined time from the start of the operation of continuing the press. In addition, when the operation of continuously pressing the close button 51c is stopped before the predetermined time is reached, the closing operation of the opening / closing body 10 is stopped at that time.
Therefore, the opening / closing body 10 can be fully closed by continuing to press the closing button 51c, and the closing operation of the opening / closing body 10 automatically stops after the predetermined time. (Overrun state) prevents the opening / closing body 10 from being pressed against the contact target portion p for a long time and causing an excessive load or the opening / closing body 10 from being reversely wound around the winding shaft 32. be able to.
Even within the predetermined time, if the hand is released from the closing button 51c, the closing operation of the opening / closing body 10 can be immediately stopped.

  Next, another control example whose flowchart is shown in FIG. 3 will be described. Since this flowchart is a partial modification of the flowchart shown in FIG. 2, detailed description that overlaps appropriately will be omitted.

  First, in step 11, the value of variable N stored in a storage device (not shown) is set to zero.

  Then, the control unit 50 waits for the input of the closing command (step 12), and when there is an input of the closing command, starts counting by the closing operation counting means (about 2 seconds according to the illustrated example) (step 13), The closing operation of the opening / closing body 10 is started (step 14).

  In the next step 15, it is determined whether or not the closing command is continued. If the closing command is continued, the process proceeds to the next step 16, and if not, the process jumps to step 18.

In step 16, it is determined whether or not the load value sensed by a load sensing unit (not shown) exceeds a predetermined threshold value. If it exceeds, the process proceeds to the next step 17; The process jumps to 18.
Here, the load sensing unit may be configured to output a signal corresponding to the load value of the switch 40, and according to an example of the present embodiment, the current for detecting the current value of the motor of the switch 40. A sensor is used. The current sensor may be in a form using, for example, CT (Current Transforme), a form using a Hall element, or any other known form. The current value signal output from the load sensing unit is input to the control unit 50.

  In step 17, it is determined whether or not the count by the closing operation counting means has reached a predetermined value (2 seconds in the illustrated example), and if so, the process proceeds to the next step 18; If so, the process returns to step 15.

  In step 18, the closing operation of the opening / closing body 10 is stopped by stopping the opening / closing device 40.

  In step 19, 1 is added to the value of the variable N.

  In step 20, the process waits for the closing command to disappear, and proceeds to the next step 21 if the closing command disappears.

In step 21, it is determined whether or not the variable N is smaller than a predetermined number of times (five times in the illustrated example). If the variable N is smaller than the predetermined number of times, the process returns to step 12; return.
The predetermined number of times prevents an excessive load from being applied to the opening / closing body 10 or reverse winding of the winding shaft 32 even when the closing operation within the limit range by the closing operation counting means is repeated. Is set as appropriate.

Thus, according to the control example shown in FIG. 3, the closing operation of the opening / closing body 10 is not performed, the input of the closing command is not continued, the load of the opening / closing device 40 exceeds a predetermined value, the closing operation counting means Can be stopped according to any of the following conditions.
In addition, on the condition that there is no input of the closing command after the closing operation of the opening / closing body 10 is stopped, when returning the processing to the input waiting state of the closing command (step 12), the return frequency is limited. By repeatedly pressing the button 51c, a closing command is repeatedly issued, and the opening / closing body 10 repeats the closing operation even after being seated, which causes excessive load on the opening / closing body 10 or reverse winding by the winding shaft 32. Can be prevented.

  According to the control example (see FIG. 3), the process is returned to step 20 when N reaches a predetermined number in step 21. As another example, N is predetermined in step 21. When the number of times is reached, a predetermined process such as issuing an alarm or an abnormal signal may be performed.

Further, the present invention does not limit the control when the closing direction end of the opening / closing body 10 is on the opening direction side with respect to the predetermined range H before full closing, but as an example, the closing direction end of the opening / closing body 10 is not limited. When the part is on the opening direction side with respect to the predetermined range H, the opening / closing operation of the opening / closing body 10 by the close button 51c is stopped only by pressing the stop button 51b (that is, an operation of releasing the hand from the close button 51c). Does not stop.)
In addition, when the closing direction end of the opening / closing body 10 is on the opening direction side with respect to the predetermined range H, the opening / closing body 10 is inverted and raised when a detection signal is received from the seat plate detection unit during the closing operation. Perform predetermined danger prevention control such as (touch-up operation).

  Further, according to the above-described embodiment, the counter type limit switch 41 of the opening / closing machine 40 is used as a position detection unit before full closing, but another example of the position detection unit before full closing is provided on the guide rail 20. A contact-type or non-contact-type sensor (for example, a micro switch, a proximity switch, or the like) configured to detect the opening / closing body 10 in the fully closed position may be used.

  In addition, the seat plate sensing unit may be other than the above-described embodiment as long as it can detect that the closing direction end of the opening / closing body 10 is in contact with the contact target site p. Further, a mode in which a sensor (for example, a tape switch or the like) that outputs a detection signal by a pressing force from below is provided at the end of the opening / closing body 10 in the closing direction may be used.

  Further, according to the above embodiment, the closing command input to the control unit 50 is the contact signal of the closing button 51c of the operation unit 51. As another example, this closing command is used as a remote control device or other operation. It can be a signal emanating from the circuit.

  Further, according to the above embodiment, as an example of the closing operation counting unit, the timer is used to count for a predetermined time. However, as another example of the closing operation counting unit, the closing operation of the opening / closing body 10 is performed. It is good also as a structure which counts the movement distance by. In this case, the closing operation counting means counts the amount of rotation in the closing direction of the opening / closing device 40 or the winding device 30 as the moving distance by an encoder or the like, and the count value reaches a predetermined value (predetermined distance). In this case, the control signal may be output after counting up. In this case, the predetermined value may be set to a distance required for the closing operation until the closing direction end of the opening / closing body 10 reaches the fully closed position from the opening direction end of the predetermined range H.

10: Opening and closing body 12: Movable seat plate (seat plate sensor)
30: Winding device 40: Opening / closing machine 41: Counter type limit switch (position detection part before full closing)
50: Control unit

Claims (4)

An opening / closing body that performs a closing operation by sliding an end portion in the closing direction, a position detection unit that detects that the closing direction end portion of the opening / closing body is within a predetermined range before full closing, and a closure of the opening / closing body A seat plate sensing unit that senses that the direction end has contacted an object on the closing direction side, and a control unit that controls the opening and closing body, and when there is a sensing signal from the position detection unit before all closing , An opening / closing device adapted to invalidate the seat plate sensing unit,
The control unit is in a state of waiting for an input of a closing command in a state in which a detection signal is input by the position detection unit before the all-closed position and the opening / closing body is stopped, on condition that the closing command is input. The closing operation counting means starts counting the time or distance and starts the closing operation of the opening / closing body, and the closing operation of the opening / closing body is started on the condition that the count by the closing operation counting means reaches a predetermined value. The system is configured to return to the state of waiting for an input of the closing command on the condition that there is no input of the closing command after the stop, and the return frequency is limited. Opening and closing device.   The predetermined value is set to a time or a distance required for a closing operation until an end of the opening / closing body in a closing direction reaches a fully closed position from an end on the opening direction side of the predetermined range. The switchgear according to claim 1.   The condition for stopping the closing operation of the opening / closing body is that the count by the closing operation counting means has reached a predetermined value or that the input of the closing command is not continued. Or the switchgear of 2 description.   The condition for stopping the closing operation of the opening / closing body is that the count by the closing operation counting means has reached a predetermined value, the input of the closing command is not continued, or the drive source for closing the opening / closing body The switchgear according to claim 1 or 2, wherein the load exceeds a predetermined value.

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