JP2543473Y2 - 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 by the user 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. Had 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 a seat plate attached to the lower end of the shutter curtain that operates when the shutter curtain reaches the upper and lower limit positions or when it comes into contact with an obstacle between the upper and lower limit positions. A switch, and the upper and lower limits based on the count value of the counting means when it is determined that the shutter curtain has reached the upper limit position and the count value when it is determined that the shutter curtain has reached the lower limit position when the seat plate switch is operated. Setting means for setting the value, and the count value of the counting means becomes the upper limit value or the lower limit value set by the setting means. And it includes a control means for stopping the movement of the shutter curtain, the when.

[0009]

In the present invention, the seat plate switch used for obstacle detection is utilized, and the count value of the counting means and the lower limit position when the seat plate switch is operated and the shutter curtain is determined to have reached the upper limit position are determined. The upper limit value and the lower limit value are set based on the count value when it is determined that the time has been reached. As the upper limit value and the lower limit value, a count value when reaching the upper limit position and a count value when reaching the lower limit position can be set. The movement of the shutter curtain is stopped when the count value of the counting means reaches the set upper limit or lower limit. 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 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.

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 so that the sensing lever 34 contacts the floor surface 14 or an obstacle, for example, or the sensing lever 34 When the portion 42 contacts the block 46 and rotates in the direction of arrow A in FIG.
8 is shielded (see FIG. 4), so that light emitted from the photoelectric tube 52 is prevented from being incident on the reflection plate 48.

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 floor 14 at the lower limit position, contacts an obstacle between the upper limit position and the lower limit position, or the sensing portion 42 of the sensing lever 34 contacts the block 46 at the upper limit position. Then, the light reflected by the reflection plate 48 is blocked, and no light is incident on the photoelectric tube 52, so that 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, the sensing lever 34 is set to the block 46 or the floor surface 14.
Is set as an upper limit value or a lower limit value when the seat plate switch is actuated in contact with the switch.

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 140, 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 140 is affirmative, in step 142, 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 140 is negative, the process proceeds to step 144, 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 26A for moving the switch in the opening direction (ascending 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
Then, the process proceeds to 6, and the motor 22 is driven in a direction to open 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 26A 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 movement of the shutter curtain 10 in the opening direction is permitted until the seat plate switch is operated and the determination in step 108 is affirmed. Sensing part 4 of sensing lever 34 of seat plate switch
2 comes into contact with the block 46 at the upper limit position, the shielding wall 54 is inserted between the photoelectric tube 52 and the reflection plate 48, and the photoelectric tube 52
Becomes low level, and the determination in step 108 is affirmed. If the determination in step 108 is affirmative, the process proceeds to step 110, in which the driving of the motor is stopped. In the next step 112, the pulse count value of the upper limit position provided in the memory, i.e., sets the current count value P to the area for storing the upper limit value p _U.

In step 114, a switch 26B for moving the shutter curtain 10 in the closing direction (downward direction)
It is determined whether or not is turned on. If the determination in step 114 is negative, the motor 22 is stopped in step 116 and the process returns to step 114. Steps 114 and 116 are performed until the determination in step 114 is affirmative.
repeat. If the determination in step 114 is affirmative, the process proceeds to step 118, where the motor 22 is driven in a direction to close the shutter curtain 10. In the next step 120, it is determined whether or not the seat plate switch has been activated,
It is determined whether or not the signal output from is switched to a low level. If the determination in step 120 is negative, the process returns to step 114, and steps 104 to 108 are repeated until the seat plate switch is activated.

If the switch 26B is turned off before the seat switch is operated, steps 114 and 116 are repeated. As described above, 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 120 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 photoelectric tube 52 becomes low level, and the determination in step 120 is affirmed. Step 12
If the determination of 0 is affirmative, the routine proceeds to step 122, where the driving of the motor is stopped. In the next step 124, the pulse count value of the lower limit position provided in the memory, i.e., sets the current count value P to the area for storing the lower limit p _D.

Thus, the processing in the teaching mode is completed, and the flow 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 trajectory of the shutter curtain 10, it is removed, the setting switch 26D is operated to select the teaching mode, and the shutter curtain 10 is moved in the opening direction. After turning on the switch 26A for moving and confirming that the shutter curtain 10 is fully opened, it is only necessary to turn on the switch 26B for moving the shutter curtain 10 in the closing direction.

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 126, 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 126 is negative, the driving of the motor 22 is stopped in step 136, and the process returns to step 100. If the determination in step 126 is affirmative, in step 128, the motor 22 is driven according to the switch that has been turned on. Step 130 the pulse count value P is judged whether equal to or larger than the upper limit value p _U.

If the determination in step 128 is negative, in step 132 the pulse count value P is set to the lower limit value p.
_{It is} determined whether or not it becomes less than _D. If the determination in step 132 is negative, it is determined in step 134 whether the seat plate switch has been operated. If the determination in step 134 is negative, the process returns to step 126. 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 126 is negative or the determinations in steps 130 to 134 are affirmative, the process proceeds to step 136, in which the driving of the motor is stopped, and the process returns to step 100.

[0032] In this embodiment Thus, the sensing lever 34 of the seat plate switch as an upper limit value p _U sets the count value P when in contact with the block 46, the sensing lever 34 floor surface as the lower limit value p _D Count value P when contacted with 12
And the count value P is set to the upper limit p _U or the lower limit p _D
Since the movement of the shutter curtain 10 is stopped when the shutter is turned on, 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 10 is located at the origin position. And the work of installing the electric shutter can be easily performed. In addition, since the seat switch for obstacle detection is used for detecting the upper limit position and the lower limit position, a limit switch or the like is not required, and the configuration can be simplified.

In this embodiment, when the motor 22 is driven in the direction to open the shutter curtain 10, 1 is added to the count value, and the motor 22 is driven in the direction to close the shutter curtain 10. In this case, 1 is subtracted from the count value. However, when the shutter curtain 10 is driven in the direction of opening, it may be subtracted and added in the case of driving in the direction of closing. Good.

In this embodiment, when the seat panel switch is operated in the normal mode, the movement of the shutter curtain 10 is stopped. However, when the shutter curtain 10 is moved in the downward direction, the seat panel switch is moved. When is operated, the moving direction of the shutter curtain 10 may be reversed.

[0035]

As described above, according to the present invention, the count value when it is determined that the shutter switch has reached the upper limit position and the count value when it has been determined that the shutter curtain has reached the lower limit position by operating the seat plate switch. The upper limit and the lower limit are set based on the above, and the movement of the shutter curtain is stopped when the count value of the counting means reaches the upper limit or the lower limit. An excellent effect that it can be performed is 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 is activated when the shutter curtain reaches the upper and lower limit positions or when it comes into contact with an obstacle between the upper limit position and the lower limit position, and that the seat plate switch is activated and the shutter curtain is determined to have reached the upper limit position Setting means for setting an upper limit value and a lower limit value based on the count value of the counting means and the count value when it is determined that the lower limit position has been reached, and the count value of the counting means being set by the setting means. Control means for stopping the movement of the shutter curtain when the set upper limit or lower limit is reached. Ter.