JP2543472Y2 - Electric shutter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shutter.

[0002]

2. Description of the Related Art Conventionally, an electric shutter uses a pair of limit switches to stop the movement of a shutter curtain at an upper limit position and a lower limit position and to prevent damage to the electric shutter body due to an excessive load or the like. It has been known. In this electric shutter, one of the pair of limit switches is arranged to operate when the lower end of the shutter curtain is located at the upper limit position, and the other is operated when the lower end is located at the lower limit position. When any of the limit switches is activated, the shutter curtain stops moving.

[0003] At the lower end of the shutter curtain, a seat plate switch for detecting an obstacle is provided. If there is an obstacle on the movement trajectory of the shutter curtain when the shutter curtain is lowered, the seat plate switch comes into contact with the obstacle and operates. When the seat plate switch is operated, the movement of the shutter curtain in the descending direction is stopped. As described above, the electric shutter secures safety during use by the above-described safety mechanism and prevents the electric shutter main body from being damaged.

Further, in order to stop the movement of the shutter curtain at the upper limit position and the lower limit position, a rotary encoder for outputting a pulse corresponding to the movement of the shutter curtain is provided. There is an electric shutter that detects the upper limit position and the lower limit position. In this electric shutter, for example, the lower limit position is set as the origin position, and the number of pulses output from the rotary encoder when the shutter curtain is moved from the lower limit position to the upper limit position is stored in advance. Then, the movement of the shutter curtain is stopped when the pulse count value reaches a value corresponding to the origin position (for example, 0) or a value corresponding to the upper limit position (for example, the stored number of pulses).

[0005]

However, in the electric shutter in which the movement of the shutter curtain is stopped at the upper limit position or the lower limit position using the pair of limit switches, the position of the pair of limit switches is set when the electric shutter is installed. Has to be fine-tuned, and the installation work is complicated.

In the electric shutter in which the position of the shutter curtain is detected by using the rotary encoder, the count value is set to a predetermined value when the shutter curtain is located at the origin position, for example, the lower end portion is at the lower limit position. (Set the origin position).
This count value can be set manually with the shutter curtain positioned at the origin position, or provided with a limit switch that operates when the shutter curtain is positioned at the origin position, and automatically set when the limit switch is activated. I'm trying to do it. For this reason, it is necessary to set the count value or fine-adjust the position of the limit switch when installing the electric shutter, and the work when installing the electric shutter has been complicated.

The present invention has been made in consideration of the above-described facts, and has as its object to obtain an electric shutter which can easily perform an installation work of the electric shutter.

[0008]

In order to achieve the above object, an electric shutter according to the present invention comprises a pulse generating means for generating a pulse in accordance with the rotation of a switch for moving a shutter curtain, and a pulse generating means for generating a pulse from the pulse generating means. Counting means for counting the number of pulses applied, and when the shutter curtain is attached to the lower end of the shutter curtain and reaches at least one of the upper limit position and the lower limit position, or when it comes into contact with an obstacle between the upper limit position and the lower limit position. A setting means for setting a value corresponding to the origin position when it is determined that the shutter switch has operated and the shutter curtain has reached one of the upper limit position and the lower limit position; and Non-volatile storage means for storing the number of pulses corresponding to the maximum movement amount of There includes a control means for stopping the movement of the shutter curtain when it becomes the stored number of pulses spaced value in the storage means from the value corresponding to the value or origin position corresponding to the home position.

[0009]

In the present invention, the seat plate switch used for obstacle detection is used. When the seat plate switch is activated and the shutter curtain is determined to have reached one of the upper limit position and the lower limit position, the origin position is determined. The value corresponding to is set. The setting of the value corresponding to the origin position can be performed by changing the count value of the counting means to a predetermined value corresponding to the origin position when the judgment is made, and when the judgment is made. It can also be performed by storing the count value as a value corresponding to the origin position. Further, the number of pulses corresponding to the maximum amount of movement of the shutter curtain is stored in the nonvolatile storage means. The movement of the shutter curtain is stopped when the count value of the counting means becomes a value corresponding to the origin position or a value separated from the value corresponding to the origin position by the number of pulses corresponding to the maximum movement amount. Therefore, there is no need to fine-tune the position of the limit switch when installing the electric shutter or to manually set the count value while the shutter curtain is located at the origin position, making it easier to install the electric shutter. It can be carried out. Further, since the arrival of the shutter curtain at least one of the upper limit position and the lower limit position of the shutter curtain is detected by the seat plate switch used for obstacle detection, a limit switch or the like becomes unnecessary, and the configuration can be simplified. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an electric shutter according to the present invention.

The electric shutter is a shutter curtain 10.
It has. Both ends of the shutter curtain 10 are supported by guide rails 16 having a substantially U-shaped cross section and extending from the lintel portion 12 to the floor surface 14 along the vertical direction.
And can move in the ascending direction or the descending direction. The upper end of the shutter curtain 10 is attached to a winding shaft 18 arranged above the lintel portion 12. The winding shaft 18 has a motor 22 as a switch.
Are connected to each other via a chain 20. The take-up shaft 18 is rotated by the driving force of the motor 22 transmitted through the chain 20, whereby the shutter curtain 10 is taken up or rewinded by the take-up shaft 18, moved in the ascending or descending direction, and opened and closed. It is supposed to be.

A control device 28 is connected to the motor 22 via a drive device 24. An operation switch 26 is connected to the control device 28. The operation switch 26 includes a switch 26A for instructing opening of the shutter curtain 10 (moving in the upward direction), a switch 26B for instructing closing of the shutter curtain 10 (moving in the downward direction), and a shutter curtain. A switch 26C for instructing the stop of the movement of the switch 10 and a setting switch 2
6D. When the switch 26A or 26B of the operation switch 26 is operated, the control device 28 drives the motor 22 via the drive device 24 to move the shutter curtain 10. When the switch 26C is operated, the driving of the motor 22 is stopped. The setting switch 26D will be described later.

A rotary encoder 23 is connected to a drive shaft of the motor 22. A control device 28 is connected to the rotary encoder 23 and the motor 22
A pulse signal having the number of pulses corresponding to the rotation amount of the drive shaft, that is, the movement amount of the shutter curtain 10 is output to the control device 28. The control device 28 includes a non-volatile memory (for example, ROM) not shown. In this embodiment, the pulse number p _{max of the} pulse signal output from the rotary encoder 23 when the shutter curtain 10 has moved the maximum movement amount from the lower limit position to the upper limit position is measured in advance. The measured number of pulses is stored in the memory of the control device 28.

A seat plate 32 is attached to the lower end of the lowermost slat 30 of the shutter curtain 10 along the longitudinal direction of the slat 30. As shown in FIGS. 2 and 3, a guide tube 32 </ b> C formed by cutting a cylindrical lower side surface portion along the axial direction is attached to a lower surface of one end side in the width direction of the seat plate 32. . A cylindrical body 40A is rotatably inserted into the guide cylinder 32C. Cylinder 4
0A is a shaft member 40 erected from substantially the center of the sensing lever 34.
Is formed at the tip. Therefore, the sensing lever 34 is rotatable about the cylindrical body 40A.

On the lower surface of the seat plate 32 at the other end in the width direction, a vertical portion 32A bent downward, and the vertical portion 32A
A protruding piece 32B bent inward from the tip of A is formed. The sensing lever 3 in FIG.
The hook portion 38 of the arm 36 formed on the left end of the 4 is hooked. The sensing lever 34 is formed so that the center of gravity is located on the left side of FIG. 3 from the mounting position of the shaft member 40. The sensing lever 34 is turned around the cylindrical body 40A in the direction opposite to the direction of arrow A in FIG. Although the force for moving is applied, the hook portion 38 is
By being hooked on B, the state shown in FIG. 3 is maintained.

At the right end of the sensing lever 34 in FIG.
A sensing portion 42 widened toward the front end is formed, and in a state where the shutter curtain 10 is located at the upper limit position, the sensing portion 42 abuts on a block 46 fixed to the lintel portion 12 (see FIG. 4), and a sensing lever is provided. 34 is rotated in the direction of arrow A in FIG. When the lower surface of the sensing lever 34 comes into contact with an obstacle or the floor surface 14, the lower left side of FIG. 3 protruding is pressed, and the sensing lever 34 is rotated in the direction of arrow A in FIG.

A reflection base 50 to which a rectangular reflection plate 48 for reflecting light is fixed is fixed to the upper surface on the right side of the seat plate 32. A photoelectric tube 52 (see FIG. 1) that emits light toward the reflection plate 48 is attached to the inside of the shutter case 44 corresponding to the reflection plate 48. Phototube 52
Is reflected by the reflection plate 48 and received by the photoelectric tube 52 again. The phototube 52 is connected to the control device 28.

A shield 58 is provided near the reflection base 50.
Is arranged. The shielding part 58 is composed of a base part 60 provided with an opening part 62 and a shielding wall 54 erected on the base part 60 so as to surround three peripheral edges of the reflection plate 48 to shield or prevent light from scattering. Have been. A mounting part 62 is formed at an end of the base part 60, and the mounting part 62 passes through a long hole 64 formed in the shaft member 40 of the sensing lever 34, and a tip part thereof is fixed to the sensing lever 34. (See FIG. 3). Therefore, as shown in FIGS. 3 and 4, the shielding portion 58 is rotated integrally with the sensing lever 34, and the sensing lever 34 contacts the floor surface 14 or an obstacle, for example, and rotates in the direction of arrow A in FIG. 3. When moved, the shielding wall 54 shields the reflector 48 (see FIG. 4), and the light emitted from the photoelectric tube 52 is reflected by the reflector 4.
8 is blocked.

As described above, the sensing lever 34 and the photoelectric tube 5
2. The reflection plate 48 and the shielding portion 58 constitute a seat plate switch. Since the phototube 52 normally receives light reflected by the reflection plate 48, a high-level signal is output from the phototube 52 to the control device 28. When the sensing lever 34 contacts the block 46 at the upper limit position, the floor surface 14 at the lower limit position, or an obstacle between the upper limit position and the lower limit position, the light is reflected by the reflector 48. Light is blocked and the photoelectric tube 52
No light is incident on the signal, and the signal is switched to a low level. Since the reflection base 50 to which the reflection plate 48 is attached is fixed to the seat plate 32 while being inserted into the opening 62, the reflection base 50 does not interfere with the movement of the shielding portion 58.

As shown in FIG. 3, a stopper 66 is mounted on the upper surface on the left side of the seat plate 32 so that the shutter curtain 1 can be operated regardless of whether the operation of the motor 22 is stopped.
Shutter curtain 1 when lower end of 0 is at upper limit
0 is stopped, and the shutter curtain 10 is prevented from being pushed up.

On the other hand, the electric shutter of the present embodiment can select a normal mode or a teaching mode as a drive mode. The normal mode is selected during the normal operation of the electric shutter, and the switch 2 of the operation switch 26 is selected.
The shutter curtain 10 is moved according to the operation of 6A, 26B, 26C. The teaching mode is selected when the electric shutter is installed. As described later, the control device 28 counts the number of pulses of the pulse signal input from the rotary encoder 23. In the teaching mode, when the sensing lever 34 comes into contact with the floor surface 14 and the seat plate switch is operated, a process for setting a value corresponding to the origin position as a count value is performed.

Next, the operation of this embodiment will be described. First, the pulse rising interrupt routine of the present embodiment will be described with reference to the flowchart of FIG. The interrupt routine is executed at the timing when each pulse of the pulse signal input from the rotary encoder 23 rises.

In step 130, it is determined whether or not the motor 22 is driven in a direction to open the shutter curtain 10. If the determination in step 130 is affirmative, in step 132, the pulse count value P stored in a non-illustrated writable memory (for example, RAM) is stored.
Is added to "1". On the other hand, if the determination in step 130 is negative, the process proceeds to step 134, where "1" is subtracted from the pulse count value P stored in the memory. Therefore, the number of pulses of the pulse signal output from the rotary encoder 23 is added or subtracted according to the moving direction of the shutter curtain 10 and counted.

Next, the main routine of this embodiment will be described with reference to the flowchart of FIG. In step 100, it is determined whether the currently set drive mode is the teaching mode. If the determination in step 100 is affirmative, the drive of the motor 22 is stopped in step 102. In the next step 104, the shutter curtain 10
It is determined whether or not the switch 26B for moving the switch in the closing direction (downward direction) is turned on.

If the determination in step 104 is negative, the process returns to step 102, and steps 102 and 104 are repeated until the determination in step 104 is affirmative. If the determination in step 104 is affirmative, step 10
The program proceeds to 6, and the motor 22 is driven in a direction to close the shutter curtain 10. Note that the state of the seat switch at this time is such that light emitted from the photoelectric tube 52 is reflected by the reflector 48 and enters the photoelectric tube 52, and a high-level signal is output from the photoelectric tube. In the next step 108, it is determined whether or not the seat plate switch has been operated, that is, whether or not the signal output from the photoelectric tube 52 has been switched to a low level.
If the determination in step 108 is negative, step 1
Return to step 04 and step 10 until the seat switch is activated.
Steps 4 to 108 are repeated.

If the switch 26B is turned off before the seat switch is operated, steps 102 and 104 are repeated. In this manner, the operation is performed such that only the movement of the shutter curtain 10 in the closing direction is permitted until the seat plate switch is operated and the determination in step 108 is affirmed. The sensing lever 34 of the seat plate switch is
Abutting the shielding wall 5 between the photoelectric tube 52 and the reflecting plate 48.
4 is inserted, the output signal of the phototube 52 becomes low level, and the determination in step 108 is affirmed. Step 10
If the determination in step 8 is affirmative, the routine proceeds to step 110, where the driving of the motor is stopped.

In the next step 112, "0" is set as a value corresponding to the origin position in the pulse count value P stored in the memory. In step 114, 0 is set in the area for storing the pulse count value at the lower limit position provided on the memory in the same manner as described above. In step 116, the number of pulses p when the maximum movement amount previously stored in the memory is moved to the area for storing the pulse count value at the upper limit position provided on the memory.
Set _max . Thus, the processing in the teaching mode ends, and the process returns to step 100. Therefore, as an operation of the operator at the time of installing the electric shutter, if there is an obstacle on the movement locus of the shutter curtain 10, the obstacle is removed, the teaching mode is selected, and the switch 26B for moving the shutter curtain 10 in the closing direction is turned on. Only need.

On the other hand, if the determination in step 100 is negative, it is determined that the normal mode is currently set as the drive mode, and in step 118, a switch for moving the shutter curtain 10 in the opening direction (upward direction). 26
A, or it is determined whether the switch 26B for moving in the closing direction is turned on. If the determination in step 118 is negative, the driving of the motor 22 is stopped in step 126, and the process returns to step 100. If the determination in step 118 is affirmative, in step 120, the motor 22 is driven according to the switch that has been turned on. In step 122, it is determined whether or not the pulse count value P has reached or exceeded the pulse count value (p _max ) at the upper limit position.

If the determination in step 120 is negative, it is determined in step 124 whether the pulse count value P has become equal to or less than the pulse count value (0) at the lower limit position. If the determination in step 124 is negative,
At step 125, it is determined whether or not the seat plate switch has been operated. If the determination in step 125 is negative, the process returns to step 118. As a result, the switch that has been turned on is turned off, the shutter curtain 10 reaches the upper limit position, reaches the lower limit position, or the seat plate switch contacts the obstacle between the upper limit position and the lower limit position. Continue driving the motor until it operates. If the determination in step 118 is negative, or steps 122 to 1
If the determination at 25 is affirmative, the routine proceeds to step 126, where the driving of the motor is stopped and the routine returns to step 100.

As described above, in this embodiment, the count value is set to a value corresponding to the origin position, that is, 0 in a state where the sensing lever 34 of the seat plate switch is in contact with the floor surface 14, and the count value becomes 0. Or the value p corresponding to the maximum travel distance
_Since the movement of the shutter curtain 10 is stopped when the _{maximum value} is reached, the position of the limit switch is finely adjusted when the electric shutter is installed, or the count value is manually set while the shutter curtain is located at the origin position. And the work of installing the electric shutter can be easily performed. Further, since the seat switch for obstacle detection is used for detecting the origin position, a limit switch or the like is not required, and the configuration can be simplified.

Although the value corresponding to the origin position is set to "0" in the present embodiment, the present invention is not limited to this. In the present embodiment, the shutter curtain 10
When the motor 22 is driven in a direction to open the shutter curtain, 1 is added to the count value, and when the motor 22 is driven in a direction to close the shutter curtain 10, 1 is subtracted from the count value. However, the subtraction may be performed when the motor is driven in the opening direction, and may be added when the vehicle is driven in the closing direction.

In this embodiment, the origin position is set as the lower limit position. However, the origin position may be set as the upper limit position. Also,
In the present embodiment, the count value is changed to a value corresponding to the origin position when the seat plate switch is operated and the shutter curtain reaches the lower limit position, but the seat plate switch is operated and the shutter curtain is moved to the upper limit position. When the count value reaches one of the lower limit position and the count value, the count value is stored as a value corresponding to the origin position, and when the count value becomes a value corresponding to the origin position or a value separated from the value by a maximum movement amount. Alternatively, the movement of the shutter curtain may be stopped.

[0033]

As described above, in the present invention, a value corresponding to the origin position is set when it is determined that the shutter switch has operated and the shutter curtain has reached one of the upper limit position and the lower limit position. At the same time, the shutter curtain moves when the count value of the pulse generated in accordance with the rotation of the switch becomes the value corresponding to the origin position or the value corresponding to the maximum movement distance from the value corresponding to the origin position. Is stopped, so that an excellent effect that the installation work of the electric shutter can be easily performed can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an electric shutter according to an embodiment.

FIG. 2 is a perspective view of the vicinity of a seat plate switch of the electric shutter.

FIG. 3 is a cross-sectional view showing a state before a seat plate switch is operated.

FIG. 4 is a cross-sectional view showing a state when a seat plate switch is operated.

FIG. 5 is a flowchart illustrating a process of a main routine according to the present embodiment.

FIG. 6 is a flowchart illustrating processing of a pulse rising interrupt routine according to the present embodiment.

[Explanation of symbols]

 Reference Signs List 10 shutter curtain 23 rotary encoder 26D setting switch 28 controller 34 sensing lever 48 reflector 52 phototube 54 shielding wall

Claims (1)

(57) [Scope of request for utility model registration] 1. A pulse generating means for generating a pulse in accordance with the rotation of a switch for moving a shutter curtain, a counting means for counting the number of pulses generated from the pulse generating means, and a pulse generator attached to a lower end of the shutter curtain. A seat plate switch that operates when the shutter curtain reaches at least one of the upper limit position and the lower limit position or when it comes into contact with an obstacle between the upper limit position and the lower limit position, and a shutter switch that operates and the shutter curtain moves to the upper limit position. Setting means for setting a value corresponding to the origin position when it is determined that one of the lower limit position has been reached, and non-volatile storage means for storing the number of pulses corresponding to the maximum movement amount of the shutter curtain, The count value of the counting means is calculated from the value corresponding to the origin position or the value corresponding to the origin position in the storage means. And control means for stopping the movement of the shutter curtain when the value reaches the value separated by the number of pulses stored in the shutter.