JP2008180010A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening / closing device capable of accurately recognizing an increase in load value when an opening / closing body comes into contact with an object on the closing direction side.
An opening / closing body 10 that opens and closes by sliding and a rotation drive source 35 that opens / closes the opening / closing body 10 are detected, and detects that the opening / closing body 10 is in contact with an object in an operation direction. In the open / close device configured as described above, during the operation of the rotary drive source 35, the physical quantity that changes with the load fluctuation of the rotary drive source 35 is detected and stored continuously or intermittently, and among the stored physical quantities, For a physical quantity detected before the opening / closing body 10 abuts on an object in the operation direction, a value larger than the maximum value is set as a threshold, and thereafter, the physical quantity detected with the operation of the opening / closing body 10 is It is characterized in that predetermined control is performed on condition that the threshold is exceeded.
[Selection] Figure 1

Description

  The present invention relates to a shutter device including an overhead door, a sliding door including a shutter, a window, a roll screen, a blind, an awning device, a gate, a gate, a sliding wall device, and the like, and more particularly to an opening / closing device for partitioning a space portion of a structure. The present invention relates to an opening / closing device configured to detect that a body has come into contact with an object on a movement direction side.

  Conventionally, in this type of invention, as described in Patent Document 1, for example, a physical quantity (a DC voltage detected by a load detection device) that changes according to a load of a drive source (motor) is a predetermined threshold value. On the condition that the voltage is equal to or less than (reference voltage), it is determined that the opening / closing body (shutter curtain) is in contact with an obstacle and an abnormal signal is output.

By the way, during the normal opening / closing operation of the opening / closing device, the load of the driving source is unexpectedly large due to foreign matter existing between the opening / closing body and the guide rail, an increase in sliding resistance due to secular change, etc. It may become.
Therefore, as in the prior art described above, the switchgear that performs the predetermined control on the condition that the load of the drive source exceeds the predetermined threshold does not malfunction due to the influence of the foreign matter, sliding resistance, and the like. As described above, it is necessary to set the threshold value in advance.
However, according to such a configuration, when the operation of the opening / closing body is stopped in response to the abnormal signal, there is a possibility that the stop operation is delayed and the impact or the contact load on the obstacle is increased. is there.
Moreover, the load that normally acts on the drive source differs depending on the weight of the opening / closing body and the characteristics of the balance spring provided on the winding shaft that winds the opening / closing body. Therefore, the delay of the stop operation becomes significant.
In addition, when it is attempted to detect that the closing direction end of the opening / closing body is in contact with the storage case by the full opening of the opening / closing body by the above-described conventional technology, the opening / closing body is Unnecessary pulling force is applied, and as a result, the durability of the switchgear may be lowered.
In addition, when the opening / closing body is fully closed, it is attempted to detect that the closing direction end of the opening / closing body is in contact with a contact target portion (for example, a floor surface, the ground, a frame member, etc.) by the above-described conventional technique. Since an unnecessary compressive force is applied to the opening / closing body, there is a possibility that the opening / closing body in the fully closed state may bump, or the durability of the opening / closing device may be reduced.
Japanese Utility Model Publication No. 5-32697

  The present invention has been made in view of the above-described conventional circumstances, and the subject of the present invention is that it is possible to accurately recognize an increase in load value when the opening / closing body abuts on an object on the closing direction side. An object of the present invention is to provide an opening / closing device capable of improving the stop position accuracy when the opening / closing body is fully closed.

In order to solve the above problems, a first invention includes an opening / closing body that opens and closes by sliding, and a drive source that opens and closes the opening / closing body, and the opening / closing body abuts against an object on an operation direction side. In the switchgear configured to detect this, during operation of the drive source, a physical quantity that changes with a load fluctuation of the drive source is detected and stored continuously, and among the stored physical quantities, For the physical quantity detected before the opening / closing body abuts on the object in the operation direction side, a value larger than the maximum value is set as a threshold value,
Thereafter, predetermined control is performed on the condition that the physical quantity detected by the operation of the opening / closing body exceeds the threshold value.

  Here, the opening / closing device according to the present invention may be any device as long as the opening / closing body is slid by the power of the drive source to be opened and closed, and the opening / closing device is wound around the winding shaft. And a mode in which the opening / closing body is accommodated in the opening direction where the opening / closing body is wound up.

  Further, as a preferable specific example of the opening / closing body, a mode in which a plurality of slats and pipes are continuously provided in the opening / closing direction, or a single or a plurality of panels, a sheet-like object, and a net-like object are provided in the opening / closing direction. Aspects, or a mode in which slats, panels, pipes, sheet-like objects, net-like objects, etc. are appropriately combined may be mentioned. The operating direction of the opening / closing body shall be the vertical direction, horizontal direction, diagonal direction, etc. Can do.

  The drive source is preferably a rotary induction motor such as an AC motor or a DC motor, but may be a linear motor or an air motor as another example.

  Further, in the configuration of “detecting that the opening / closing body is in contact with the object in the operation direction”, the closing direction end of the opening / closing body during the closing operation is a contact target portion (for example, a floor) For detecting contact with the surface, the ground, the frame member, etc., or the closing direction end of the opening / closing body during the opening operation is in contact with the contact target portion (such as a storage portion or a lintel portion) when fully opened A mode for detecting this, a mode for detecting that the closing direction end of the opening / closing body during the closing operation is in contact with an obstacle on the closing direction side, and the like.

The physical quantity includes a load value of the drive source, a voltage value that changes with a change in the load value, a current value, a rotation speed, and the like.
The means for detecting the physical quantity may be configured to directly detect the load voltage, load current, load rotational speed, etc. of the drive source, or provided separately from the drive source. A configuration in which a load voltage, a load current, a load rotation speed, or the like is indirectly detected by a detection device may be used.

Further, the “physical quantity detected before the opening / closing body abuts on the object in the operation direction” is detected by, for example, a contact or non-contact sensor when the opening / closing body abuts on the object on the operation direction side. However, it may be a physical quantity detected before the sensing time.
As another example, it is determined that the opening / closing body is in contact with the object on the movement direction side on the condition that the physical quantity exceeds a preset threshold value, and a predetermined time before the determination time point. It is good also as a physical quantity detected in the range.

  The predetermined control includes stopping the opening / closing body, reversing the opening / closing body, outputting an alarm sound, outputting an abnormal signal, and the like.

  In the second invention, the threshold value is a value obtained by adding a predetermined margin value to the maximum value.

  According to a third aspect of the present invention, when a predetermined amount of the physical quantity is not detected, a predetermined initial threshold value set in advance is used as the threshold value.

  Here, “when the predetermined amount of physical quantity is not detected” means, for example, the case where the switchgear operates for the first time after manufacturing, installation, reset control, etc., and the physical quantity detection data is stored. It is a state that has not been done.

  Further, in the fourth invention, among the physical quantities detected and stored during the opening operation of the opening / closing body from the fully closed position to immediately before the fully opened position, a value larger than the maximum value is set as the threshold value. In the subsequent opening operation, the opening operation of the opening / closing body is stopped as the predetermined control on the condition that the physical quantity detected along with the opening operation exceeds the threshold value. And

  In the fifth invention, when the opening / closing body is opened from the fully closed position to the fully opened position, the opening action is stopped on the condition that the physical quantity exceeds the threshold value, and the opening action at that time is stopped. An amount is stored, and thereafter, the closing operation of the opening / closing body is stopped on the condition that the opening / closing body has been closed from the fully opened position by the opening operation amount or more.

  Further, in the sixth invention, when the opening / closing body is first closed or opened between the fully closed position and the fully opened position, the initial operation amount is stored, and the next closing operation is stored in the opening / closing operation. The body is stopped on the condition that the body has been closed more than the initial movement amount from the fully open position, and the next opening operation is stopped on the condition that the physical quantity has exceeded the threshold, and the opening movement amount at that time is After that, the closing operation of the opening / closing body is stopped on the condition that the opening / closing body is closed more than the opening operation amount from the fully open position.

In the present specification, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in the closed state.
In the present specification, the “opening / closing body width direction” means a direction that is substantially orthogonal to the opening / closing direction of the opening / closing body and not the thickness direction of the opening / closing body.
Further, in this specification, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body slides to partition or open the space.

Since the present invention is configured as described above, the following effects can be obtained.
According to the first invention, among the physical quantities obtained by actually driving the drive source, the physical quantity actually detected before the opening / closing body abuts the object on the operation direction side is larger than the maximum value. A value is set as the threshold value.
Therefore, it is possible to accurately recognize an increase in load value when the opening / closing body abuts on an object on the closing direction side by using an appropriately set threshold value.

  Furthermore, according to the second aspect, since a threshold value with a margin value added is set, it is possible to reduce malfunctions when detecting an increase in load value.

  Further, according to the third aspect of the present invention, when a predetermined amount of physical quantity data is not collected, such as the first opening operation, the initial operability can be obtained by using a predetermined initial threshold value set in advance. Can be improved.

Furthermore, according to the fourth aspect of the invention, it is possible to appropriately set the threshold value for detecting the fully opened state of the opening / closing body.
Therefore, it is possible to reduce the tensile force applied to the opening / closing body when fully opened, and to improve the durability of the opening / closing device.

Furthermore, according to the fifth aspect, since the opening / closing body that has been opened from the fully closed position to the fully opened position is stopped by the threshold value, the opening operation amount from the fully closed position to the fully opened position is accurately detected. Since the opening / closing body is closed by the opening operation amount, the stop position accuracy when the opening / closing body is fully closed can be improved.
Eventually, there will be a gap between the fully open / closed body and the contacted part (for example, floor, ground, frame member, etc.), or the open / close body may be compressed in the closing direction and bumped. Can be prevented.

  Furthermore, according to the sixth aspect of the invention, it is possible to provide a specific mode in which the stop at the fully open position during the opening operation and the stop at the fully closed position during the closing operation can be accurately performed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An example of the opening / closing device according to the present embodiment is disposed in or inside an opening part or inside of a housing such as a house, building, warehouse, factory, underground shopping center, tunnel, vehicle loading platform, etc. It will be described as a shutter device that partitions and opens a space.

  The opening / closing device 1 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 an end portion of the opening / closing body 10 in the width direction (left and right direction in FIG. 1), and guides the opening / closing direction. 10 is provided with a winding device 30 or the like that winds and unwinds 10 by the rotational force of the rotational drive source 35, and the opening and closing body 10 contacts an object in the opening operation direction side (accommodating portion 31 in the illustrated example). Detect contact.

  The opening / closing body 10 constitutes the opening / closing body main body 11 by connecting a plurality of slats 11a formed by bending a horizontally long substantially rectangular metal plate so as to rotate between the vertically adjacent slats. A seat plate member 12 for opening and closing a contact target portion p (for example, a floor surface, the ground, a frame member, etc.) is opened and closed at an end of the body main body 11 on the closing direction side (lower side in the illustrated example). It is connected over the body width direction (see FIG. 1).

For example, the vertical cross-sectional shape of the seat plate member 12 protrudes in the opening / closing body thickness direction so that the seat plate member 12 is brought into contact with the lintel portion (opening edge (not shown)) of the storage portion 31 when the opening / closing body 10 is fully opened. It is formed in a substantially inverted T shape having a part.
The seat plate member 12 is provided with a seat plate sensor 12a that senses that the closing direction end of the opening / closing body 10 is in contact with an object on the closing direction side.
This seat plate sensor 12a is provided with, for example, a movable seat plate at the end of the seat plate member 12 in the closing direction so as to move in the opening / closing direction relative to the opening / closing body main body 11, and the movable seat plate has moved in the opening direction. This may be configured to be detected by a known contact type sensor or a contact type sensor.

  The guide rail 20 is a member that surrounds the end in the width direction of the opening / closing body 10 in a substantially U-shaped cross section by appropriately processing an aluminum alloy material, a steel plate, another metal plate, or a synthetic resin material. And disposed between the winding device 30 and the contact target portion p.

  The winding device 30 is a mechanism that opens and closes the opening / closing body 10 by the rotational force of the rotation drive source 35. The winding shaft 32 that winds and unwinds the opening / closing body 10 in the storage unit 31; A rotation drive source 35 that rotates the winding body 32b of the winding shaft 32 in both directions via a power transmission means 33 such as a chain and a sprocket, an encoder device 36 that outputs a pulse signal in accordance with the rotation of the rotation drive source 35, A load detection unit 37 that detects a load value of the rotation drive source 35, a control unit 38 that controls the rotation drive source 35 according to signals from the encoder device 36 and the load detection unit 37, and the like are provided.

  The storage portion 31 has a substantially box shape in which an opening for allowing the opening / closing body 10 to appear and retract is formed on the lower side, and an edge portion of the opening is an end portion in the closing direction of the opening / closing body 10 when the opening is fully opened (specifically, It is a lintel (not shown) for abutting the opening / closing body thickness direction of the seat plate member 12.

  The winding shaft 32 includes a shaft body 32a that is fixed so as not to rotate with respect to the storage portion 31, a cylindrical or bowl-shaped winding body 32b that is rotatably supported around the shaft body 32a, and One or a plurality of urging means 32c for urging the winding body 32b in the opening / closing body winding direction with respect to the shaft body 32a are provided, and the opening side end of the opening / closing body 10 is stopped on the outer periphery of the winding body 32b. I wear it.

The biasing means 32c is a coil spring having one end fixed to the shaft body 32a and the other end fixed to the winding body 32b, and assists the rotational force of the rotation drive source 35 in the opening / closing body winding direction. .
The urging force of the urging means 32c is appropriately set so that the opening / closing body 10 can be stopped in the middle of opening / closing when the rotational force of the rotational drive source 35 is not acting on the winding body 32b. Has been.

  The rotational drive source 35 is an AC or DC rotary electric motor, and transmits the rotation of its output shaft to the winding body 32 b via the power transmission means 33.

The encoder device 36 is a device that outputs a pulse signal as the output shaft of the rotary drive source 35 rotates.
The number of pulse signals output from the encoder device 36 is counted by a control unit 38 which will be described later, and the count value is stored in the storage device of the control unit 38 as an opening / closing body position variable indicating the position of the opening / closing body 10 in the opening / closing direction. Remembered.
More specifically, for example, when the opening / closing body 10 is closed, the number of pulse signals (pulse number) of the encoder device 36 is added to the opening / closing body position variable, and the opening / closing body 10 is opened. In this case, the number of pulses of the encoder device 36 is subtracted from the opening / closing body position variable.
That is, if the opening / closing body 10 performs a closing operation, the opening / closing body position variable increases according to the closing operation amount, and if the opening / closing body 10 performs an opening operation, the opening / closing body position variable decreases according to the opening operation amount.
On the contrary, the opening / closing body position variable decreases with the closing operation of the opening / closing body 10 and the opening / closing body position variable increases with the opening operation of the opening / closing body 10.

The load detection unit 37 detects a physical quantity that changes with a load change of the rotation drive source 35 during the operation of the rotation drive source 35.
More specifically, the load detection unit 37 is a device that detects the load value of the rotary drive source 35 as the physical quantity as a current value or a voltage value, and outputs an electric signal corresponding to the magnitude of the load value. The data is output to the control unit 38.
That is, when the rotational drive source 35 is a general DC motor, the amount of change in the current value due to the load and the load torque have a substantially proportional correlation. Therefore, in this case, the load value of the rotation drive source 35 can be indirectly detected by detecting the amount of change in the current value of the rotation drive source 35 by the load detection unit 37.
When the rotational drive source 35 is a general AC motor, the amount of change in rotational speed due to the load and the load torque have a proportional correlation. Therefore, in this case, the load value of the rotational drive source 35 can be indirectly detected by detecting the amount of change in the rotational speed of the rotational drive source 35 by the load detector 37. The rotational speed may be a value obtained by detecting the rotational speed per unit time in the rotational drive source 35, for example.

The load value detected by the load detection unit 37 is stored in the storage area of the control unit 38 every predetermined sampling time.
The control unit 38 receives an electrical signal input from the encoder device 36, the load detection unit 37, an operation unit (not shown) (operation BOX, remote controller, computer that generates an operation signal, portable terminal, etc.) in a predetermined area of the storage device. In addition to the storage, the electronic calculation processing is performed based on the program, and a control signal corresponding to the processing result is output to the rotation drive source 35 to cause the rotation drive source 35 to rotate forward, reverse, stop, or the like.

  The control unit 38 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 according to the field conditions. A wired logic circuit using a relay circuit or other electronic circuit can also be used.

Next, characteristics of the control operation of the switchgear 1 will be described in detail based on the graph shown in FIG. 3 and the flowchart shown in FIG.
According to the opening / closing device 1, first, an initial operation for determining a threshold value and an opening operation amount is performed as shown in FIG. This initial operation is performed as an adjustment stage before the switchgear 1 is normally used.

More specifically, in step 11 of FIG. 4, the opening / closing body 10 is opened from an arbitrary opening / closing position a (see FIG. 3) to a fully opened position.
For example, when the opening / closing body 10 is fully opened when the opening / closing device 1 is installed, the opening / closing body 10 is temporarily moved to an arbitrary opening / closing position a when the operation is performed for the first time after the opening / closing device 1 is installed. The closing operation may be performed after closing.
It is also possible to start the operation with the opening / closing position a as a substantially fully open position.

During the opening operation of the opening / closing body 10, the control unit 38 determines whether or not the load value input from the load detection unit 37 exceeds a predetermined initial threshold value (step 12). If the load value exceeds the initial threshold value, the process proceeds to the next step 13; otherwise, step 12 is repeated.
That is, when the opening / closing device 1 is operated for the first time after manufacture, etc., since there is no load value data during the opening operation, it is determined by the initial threshold that the opening / closing body 10 is fully opened.
Here, the initial threshold value is a threshold value set in advance and stored in the storage area of the control unit 38. This initial threshold is determined when the closing direction end portion of the opening / closing body 10 during the opening operation (specifically, the edge portion in the thickness direction of the seat plate member 12) contacts the lintel portion of the storage portion 31 (FIG. 3). The value is set to an appropriate value so that the drive of the rotational drive source 35 continues after the point b).

  In step 13, the opening operation of the opening / closing body 10 is stopped by stopping the rotation drive source 35. That is, the opening / closing body 10 stops the opening operation at the time point c after exceeding the time point b (see FIG. 3) when the end portion in the closing direction contacts the storage portion 31. Therefore, at the time point c, a tension force in the opening / closing direction is applied to the opening / closing body 10.

  Next, the control unit 38 starts the closing operation of the opening / closing body 10 from the time point c ′ shown in FIG. 3 (step 14), and measures the closing operation amount during the closing operation based on the signal from the encoder device 36. (Step 15). More specifically, the number of pulse signals of the encoder device 36 is added to the opening / closing body position variable set in the storage area of the control unit 38.

In the next step 16, it is determined whether or not the end of the opening / closing body 10 in the closing direction is in contact with the contact target portion p (for example, a floor surface, the ground, a frame member, etc.). The process proceeds to step 17, and if not, step 16 is repeated.
In step 17, the closing operation of the opening / closing body 10 is stopped at time d shown in FIG. 3 by stopping the rotation drive source 35.
In the present embodiment, the closing of the opening / closing body 10 is detected by a signal from the seat plate sensor 12a and the closing operation is stopped. However, as another example, when the opening / closing body 10 is fully closed It is also possible to adopt a mode in which the operator who visually observes the operation manually stops the closing operation of the opening / closing body 10.

  Further, in step 18, the closing operation amount from the fully open to the fully closed state of the opening / closing body 10 (the closing operation amount from the time c ′ to the time d shown in FIG. 3) is stored in the storage area of the control unit 38.

Next, in step 19, the opening operation is started again from the point d ′ in FIG.
In step 20, during the opening operation of the opening / closing body 10, it is determined whether or not the load value input from the load detection unit 37 exceeds a predetermined initial threshold value, and if the load value exceeds the initial threshold value, The process proceeds to the next step 21; otherwise, the step 20 is repeated.

In step 21, the opening operation of the opening / closing body 10 is stopped by stopping the rotation drive source 35 in substantially the same manner as in step 13. That is, the opening / closing body 10 stops at a time point f at which a closing force in the opening / closing direction is present after the time point e (see FIG. 3) when the end in the closing direction abuts the storage portion 31.
After the stop, the control unit 38 calculates a threshold value (step 22) and stores the threshold value in a predetermined storage area (step 23).

The threshold value calculated in step 22 is detected and stored by the load detection unit 37 during the opening operation of the opening / closing body 10 from the fully closed position (d ′ time point) to immediately before the fully open position (immediately before time e). A value obtained by adding a predetermined margin value to the maximum value among the load values.
In the calculation, the time point e is a time point that is a predetermined time after the time point f at which the opening / closing body 10 is stopped.
For example, as shown in FIG. 2, the maximum value is determined by the contact between the opening / closing body 10 and the storage portion 31 from the time t <b> 1 when a load is generated on the rotation driving source 35 by the opening operation of the opening / closing body 10. The maximum value Lmax of the load value of the rotary drive source 35 is reached until the time point t2 before the load increases rapidly.
The margin value is not controlled such as stopping the opening / closing body 10 when the load value slightly increases within a normal range due to, for example, an increase in sliding resistance due to secular change or adhesion of dirt. In addition, an appropriate value is set.

  Next, the control unit 38 starts the closing operation of the opening / closing body 10 from the time point f ′ shown in FIG. 3 (step 24), and starts measuring the closing operation amount based on the number of pulses of the encoder device 36 during the closing operation. (Step 25).

In step 26, the measured value of the closing operation amount of the opening / closing body 10 has exceeded the closing operation amount stored in step 18 (according to FIG. 3, the closing operation amount from the time point c ′ to the time point d). It is judged whether or not, and if exceeded, the closing operation of the opening / closing body 10 is stopped by the next step 27, and if not, the step 26 is repeated.
That is, according to these steps 26 and 27, the opening / closing body 10 can be stopped at the time point g (see FIG. 3), which is an appropriate fully closed position, without using a signal from the seat plate sensor 12a.

  Next, the control unit 38 opens the opening / closing body 10 from the fully closed position (g ′) (step 28), and immediately after the opening operation, measures the opening operation amount based on the signal from the encoder device 36. Start (step 29)

Then, the control unit 38 determines whether or not the load value detected by the load detection unit 37 exceeds the threshold value calculated and stored in Steps 22 and 23 during the opening operation of the opening / closing body 10 (Step 30). If it exceeds, the opening operation of the opening / closing body 10 is stopped (step 31). Otherwise, step 30 is repeated.
That is, according to steps 30 and 31, the opening operation of the opening / closing body 10 is stopped by the suitable threshold value calculated in step 22 based on the load value data during the actual opening operation. Therefore, at this stop time (time h shown in FIG. 3), the pulling force in the opening / closing direction with respect to the opening / closing body 10 can be reduced.

Next, in step 32, the opening operation amount when the opening / closing body 10 is opened in steps 28 to 31 (according to FIG. 3, the opening operation amount from the time point g 'to the time point h) is stored in the control unit 38. This is stored in the area, and the initial operation of the switchgear 1 is finished.
The threshold value stored in step 23 and the opening operation amount stored in step 32 are used for normal operation control, which will be described later.

In the normal operation control, as shown in the flowchart of FIG. 5, first, it is determined whether or not the opening / closing body 10 is opening based on an opening signal from an operation switch or a remote controller (not shown) (step 41a). If the body 10 is performing an opening operation, the process proceeds to the next step 42a, and if not, the process proceeds to step 41b.
Specifically, the determination in step 21 may be made based on, for example, a contact signal from a relay circuit or the like for forward and reverse rotation of the rotation drive source 35.

In step 42a, it is determined whether or not the load value detected by the load detection unit 37 during the opening operation exceeds a threshold value. If it exceeds, the process proceeds to the next step 43a. Step 42a is repeated.
In step 43a, the opening operation of the opening / closing body 10 is stopped, and the process returns to step 41a.

  That is, according to the above steps 42a and 43a, the opening / closing body 10 during the opening operation stops at the fully opened position based on the appropriate threshold value determined in the initial operation flow shown in FIG. Therefore, in this stop state, the pulling force in the opening / closing direction with respect to the opening / closing body 10 can be reduced.

In Step 41b, it is determined whether or not the opening / closing body 10 is closing based on an opening signal from an operation switch (not shown) or a remote controller. If the opening / closing body 10 is closing, the next step is performed. The process proceeds to 42b. Otherwise, the process returns to step 41a.
In step 42b, measurement of the closing operation amount of the opening / closing body 10 is started based on the signal from the encoder device 36.

Next, in step 43b, it is determined whether or not the measured value of the closing operation amount of the opening / closing body 10 exceeds the opening operation amount determined in the initial operation flow (step 32) in FIG. The process is shifted to step 44b, and if not, step 43b is repeated.
In step 44b, the closing operation of the opening / closing body 10 is stopped, and the process returns to step 41a.

  That is, the opening operation amount determined in step 32 in the flow of FIG. 4 is the maximum stroke that allows the opening / closing operation of the opening / closing body 10 with little stress. In the above steps 43b and 44b, the opening / closing body 10 is stopped at the fully closed position with the preferable maximum stroke as the closing operation amount.

Next, another example of the embodiment according to the present invention will be described.
In the embodiment described below, the program and the electronic circuit of the control unit 38 are changed with respect to the switching device 1.

If it demonstrates in detail, the aspect shown to FIG. 6 and 7 will change only the initial stage operation | movement flow with respect to the said switchgear 1. FIG.
In this aspect, as shown in the flowchart of FIG. 7, first, in step 51, the opening / closing body 10 is closed. As shown in FIG. 6, the closing operation at this time is a closing operation from the opening / closing halfway position a to the fully closing time point b.
During this closing operation, the control unit 38 makes the closing direction end of the opening / closing body 10 abut on a contact target portion p (for example, a floor surface, the ground, a frame member, etc.) based on a signal from the seat plate member 12. (Step 52), if it comes into contact, the closing operation of the opening / closing body 10 is stopped (step 53), and if not, step 52 is repeated.

Next, the control unit 38 starts the opening operation of the opening / closing body 10 from the fully closed time point b ′ (step 54), and further starts the measurement of the opening operation amount based on the signal of the encoder device 36 (step 55).
And the control part 38 judges whether the load value of the load detection part 37 exceeded the predetermined | prescribed initial threshold value (step 56), and when it exceeds, the opening operation | movement of the opening-closing body 10 is stopped (step 57). Otherwise, step 56 is repeated.
The initial threshold value is the same as that used in step 12 (see FIG. 4).
Therefore, the opening / closing body 10 stops the opening operation at the time point d (see FIG. 6) after the time point c (see FIG. 6) when the end portion in the closing direction contacts the storage portion 31 is exceeded. At the time point d, the opening / closing body 10 is in a state where a tensile force in the opening / closing direction is acting.

Next, the control unit 38 calculates a threshold value to which a predetermined margin value has been added in substantially the same manner as in steps 22 to 23 (see FIG. 4) (step 58), and stores the threshold value in a predetermined storage area. (Step 59). Furthermore, the control part 38 memorize | stores the opening operation amount measured by the said steps 55-57 in a predetermined storage area (step 60).
That is, with reference to FIG. 6, load detection is performed for a range from a fully closed time point b ′ of the opening / closing body 10 to a time point just before the time point c at which the closing direction end portion of the opening / closing body 10 abuts the storage portion 31. The threshold value is calculated and stored by adding a predetermined margin value to the maximum value among the load values detected and stored by the unit 37. The opening operation amount from the fully closed time point b ′ to the time point d stopped by the initial threshold is also stored.

  In the next step 61, the closing operation of the opening / closing body 10 is started from the time point d 'in FIG. 6, and at the same time, in step 62, measurement of the closing operation amount is started based on the signal of the encoder device 36.

  Then, the control unit 38 determines whether or not the measured value of the closing operation amount of the opening / closing body 10 exceeds the opening operation amount stored in Step 60 (Step 63). Assuming that the fully closed time point e (see FIG. 6) has been reached, the closing operation of the opening / closing body 10 is stopped (step 64). Otherwise, step 63 is repeated.

Next, the control unit 38 opens the opening / closing body 10 from the fully closed time point e ′ (see FIG. 6) (step 65), and at the same time, starts measuring the opening operation amount based on the signal from the encoder device 36.
During this opening operation, the control unit 38 determines whether or not the load value based on the signal of the load detection unit 37 has exceeded the threshold value calculated and stored in steps 58 to 59 (step 67). In step S68, the opening operation of the opening / closing body 10 is stopped (step 68). Otherwise, step 67 is repeated.
In the next step 69, the opening operation amount of the opening / closing body 10 is stored, and the initial operation flow is ended.

That is, according to the above steps 65 to 69, the opening / closing body 10 performs the opening operation from the time point e ′ to the time point f in FIG. 6, and the opening operation amount during that time is stored. At the time point f when the opening / closing body 10 stops the opening operation, the suitable threshold value calculated in step 58 is used, so that the tensile force in the opening / closing direction with respect to the opening / closing body 10 during the normal operation can be reduced.
The threshold value stored in step 59 and the opening operation amount stored in step 69 are used for the above-described normal operation control (see FIG. 5).
Therefore, in the initial operation flow shown in FIG. 7, as apparent from a comparison between FIG. 3 and FIG. 6, the operation amount of the opening / closing body 10 performed as the initial setting is reduced as compared with the initial operation flow of FIG. be able to.

  In more detail, the opening / closing positions shown in FIG. 3 and FIG. 6 are values obtained by the control unit 38 counting pulse signals from the encoder device 36 and completely coincide with the actual position of the opening / closing body 10. Although it is not a thing, the position of the opening-closing body 10 is reflected substantially.

  3 and 6, the amount of movement from the “position in contact with the storage portion” toward the opening direction is deformed and displayed in order to clarify the characteristic operation of the present application. The actual amount of movement is slightly smaller than the opening / closing stroke from the fully closed position to the “position in contact with the storage portion”.

  The slopes of the graphs shown in FIGS. 3 and 6 are examples, and the opening / closing speed may be constant or variable, and the opening speed and the closing speed may be the same or different.

  Also, in the flowchart of the illustrated example, the control operation when other control signals (for example, a stop command or the like) not shown in the flow are input is omitted, but other control signals are input. In such a case, the illustrated flow is interrupted and appropriate processing according to other control signals is performed.

  Further, according to the above embodiment, the initial operation flow (see FIGS. 4 and 7) is performed before the normal operation. However, as another example, the initial operation flow is omitted, and all the operations during the normal operation are performed. It is also possible to obtain the threshold value used for the determination of the fully open position and the opening operation amount used for the determination of the fully closed position from the load value data and the operation amount from the close to the full open.

  As another embodiment, the initial operation shown in FIG. 3 and the initial operation shown in FIG. 6 may be automatically selected according to the first operation content. More specifically, in this embodiment, when the first operation is an opening operation, the initial operation shown in FIG. 3 is performed, and when the first operation is a closing operation, it is shown in FIG. Perform initial operation.

It is a schematic diagram which shows an example of the switchgear concerning this invention. It is a graph which shows the load fluctuation from a fully closed state to a fully open state in the switchgear. It is a graph which shows the initial stage operation | movement of the opening / closing body in the switchgear. It is a flowchart which shows the initial stage operation | movement in the switchgear. It is a flowchart which shows the normal operation | movement in the switchgear. It is a graph which shows the initial stage operation | movement of an opening / closing body about the other example of the opening / closing apparatus concerning this invention. It is a flowchart which shows the initial stage operation | movement in the switchgear.

Explanation of symbols

10: Opening and closing body 12: Seat plate member 30: Winding device 31: Storage unit 35: Rotation drive source (drive source)
36: Encoder device p: Contact target part

Claims (6)

In an opening and closing device comprising an opening and closing body that opens and closes by sliding, and a drive source that opens and closes the opening and closing body, and detects that the opening and closing body is in contact with an object on the operation direction side,
During operation of the drive source, continuously or intermittently detecting and storing a physical quantity that changes with a load fluctuation of the drive source;
Among the stored physical quantities, a value larger than the maximum value is set as a threshold for the physical quantity detected before the opening / closing body contacts the object on the operation direction side,
Thereafter, the opening / closing apparatus is configured to perform predetermined control on the condition that a physical quantity detected by the operation of the opening / closing body exceeds the threshold. 2. The switchgear according to claim 1, wherein the threshold value is a value obtained by adding a predetermined margin value to the maximum value.   The switchgear according to claim 1 or 2, wherein a predetermined initial threshold set in advance is used as the threshold when the physical quantity is not detected. Among the physical quantities detected and stored during the opening operation of the opening / closing body from the fully closed position to immediately before the fully opened position, a value larger than the maximum value is set as the threshold value,
In the subsequent opening operation, the opening operation of the opening / closing body is stopped as the predetermined control on the condition that the physical quantity detected along with the opening operation exceeds the threshold value. The switchgear according to any one of claims 1 to 3. When the opening / closing body is opened from the fully closed position to the fully opened position, the opening action is stopped on the condition that the physical quantity exceeds the threshold value, and the opening action amount at that time is stored.
5. The opening / closing device according to claim 4, wherein the closing operation of the opening / closing body is stopped on the condition that the opening / closing body is closed from the fully opened position by the opening operation amount or more. When the opening / closing body is first closed or opened between the fully closed position and the fully opened position, the initial operation amount is stored,
The next closing operation is stopped on the condition that the opening / closing body has closed more than the initial operation amount from the fully open position,
Further, the next opening operation is stopped on condition that the physical quantity exceeds the threshold value, and the opening operation amount at that time is stored,
5. The opening / closing device according to claim 4, wherein the closing operation of the opening / closing body is stopped on the condition that the opening / closing body is closed from the fully opened position by the opening operation amount or more.

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