JPH0510698U - Electric shutter - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain an electric shutter that allows easy installation work of the electric shutter. [Structure] In a teaching mode executed when an electric shutter is installed, the shutter curtain is lowered until the seat plate switch is activated (steps 102 to 10).
8), 0 is set to the pulse count value P and the pulse count value at the lower limit position, and the maximum movement amount of the shutter curtain is set to the pulse count value at the upper limit position (steps 112 to 116). During normal operation (steps 118 to 126), when the count value of the pulse generated according to the driving of the motor is equal to or larger than the count value of the pulse at the upper limit position, or when the count value is the pulse at the lower limit position. When the count value becomes less than or equal to or when the seat plate switch is activated, the motor drive is stopped.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric shutter.

[0002]

[Prior Art]

 Conventionally, there is known an electric shutter that uses a pair of limit switches to stop the movement of the shutter curtain at the upper limit position and the lower limit position and prevent damage to the electric shutter body due to an excessive load. .. 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. The shutter curtain stops moving when any limit switch is activated.

A seat plate switch for detecting an obstacle is provided at the lower end of the shutter curtain. When there is an obstacle on the movement path of the shutter curtain when the shutter curtain descends, the seat plate switch comes into contact with the obstacle and operates. When the seat switch is activated, the movement of the shutter curtain in the downward direction is stopped. In this way, the electric shutter secures the safety during use by the above-mentioned safety mechanism and prevents the electric shutter 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 that outputs a pulse according to the movement of the shutter curtain is provided, and the number of pulses output from the rotary encoder is counted to indirectly. There is an electric shutter that is designed to detect the upper limit position and the lower limit position. In this electric shutter, for example, the lower limit position is 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. The movement of the shutter curtain is stopped when the count value of the pulse reaches a value corresponding to the origin position (for example, 0) or a value corresponding to the upper limit position (for example, the stored pulse number).

[0005]

[Problems to be solved by the device]

 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 by using the pair of limit switches, it is necessary to finely adjust the position of the pair of limit switches when installing the electric shutter. The installation work was complicated.

Further, in the electric shutter in which the position of the shutter curtain is detected by using the rotary encoder, the count value is predetermined in a state where the shutter curtain is at the origin position, for example, the lower end portion is at the lower limit position. It is necessary to set it as a value (set the origin position). This count value is set manually by the user with the shutter curtain at the origin position, or by providing a limit switch that operates when the shutter curtain is at the origin position, and automatically when the limit switch is activated. I am going to do it. For this reason, it was necessary to set the count value or finely adjust the position of the limit switch when installing the electric shutter, which made the work when installing the electric shutter complicated.

The present invention has been made in view of the above facts, and an object thereof is to obtain an electric shutter that allows easy installation work of the electric shutter.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the electric shutter according to the present invention counts the number of pulses generated by the pulse generating means and the pulse generating means for generating a pulse according to the rotation of the opening / closing device that moves the shutter curtain. A seating plate that is attached to the lower end of the shutter curtain and that operates when the shutter curtain reaches at least one of the upper limit position and the lower limit position or when it abuts an obstacle between the upper limit position and the lower limit position. The switch and the setting means that sets the value corresponding to the origin position when it is determined that the shutter curtain has reached either one of the upper limit position and the lower limit position by operating the seat plate switch, and the maximum movement of the shutter curtain. Non-volatile storage means for storing the number of pulses corresponding to the quantity, and the count value of the counting means corresponds to the origin position. And it 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 that value or origin.

[0009]

[Action]

 In the present invention, the seat plate switch used to detect the obstacle is used, and the seat plate switch is operated to correspond to the origin position when it is determined that the shutter curtain has reached either the upper limit position or the lower limit position. I am trying to set the value. The value corresponding to the origin position can be set by changing the count value of the counting means to a predetermined value corresponding to the origin position when the judgment is made, and the judgment is made. It can also be performed by storing the count value at the time of the start as a value corresponding to the origin position. Further, the nonvolatile storage means stores the number of pulses corresponding to the maximum movement amount of the shutter curtain. The movement of the shutter curtain is stopped when the count value of the counting means reaches the value corresponding to the above-mentioned 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. .. For this reason, it is not necessary to finely adjust the position of the limit switch when installing the electric shutter, and it is not necessary to manually set the count value when the shutter curtain is at the origin position, which facilitates the installation work of the electric shutter. Can be done. Also, the seat plate switch used to detect obstacles detects the shutter curtain reaching at least one of the upper limit position and the lower limit position, so a limit switch is not required and the configuration can be simplified. ..

[0010]

【Example】

 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 includes a shutter curtain 10. Both ends of the shutter curtain 10 are supported by guide rails 16 having a substantially U-shaped cross section and extending vertically from the lintel portion 12 to the floor surface 14, and the shutter curtain 10 has guide rails. It is guided by 16 and can move up or down. The upper end of the shutter curtain 10 is attached to the winding shaft 18 arranged above the lintel 12. The winding shaft 18 is connected to a drive shaft of a motor 22 as an opening / closing machine via a chain 20. The winding shaft 18 is rotated by the driving force of the motor 22 being transmitted through the chain 20, whereby the shutter curtain 10 is wound or rewound on the winding shaft 18 and moved in the ascending or descending direction to open or close. It is supposed to be done.

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 (movement in the upward direction) of the shutter curtain 10, a switch 26B for instructing closing (movement in the downward direction) of the shutter curtain 10, and a shutter curtain. A switch 26C for instructing to stop the movement of 10 and a setting switch 26D are provided. 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 the drive shaft of the motor 22. A control device 28 is connected to the rotary encoder 23 and outputs a pulse signal having a pulse number corresponding to the rotation amount of the driving shaft of the motor 22, that is, the movement amount of the shutter curtain 10, 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 moves 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 controller 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 cylinder 32C, which is formed by cutting out a cylindrical lower side surface along the axial direction, is attached to the lower surface at one end in the width direction of the seat plate 32. ing. A columnar body 40A is rotatably inserted in the guide cylinder 32C. The columnar body 40A is formed at the tip of the shaft member 40 which is erected from the substantial center of the sensing lever 34. Therefore, the sensing lever 34 is rotatable around the cylindrical body 40A.

Further, a vertical portion 32A bent downward and a protrusion 32B bent inward from the tip of the vertical portion 32A are formed on the lower surface of the seat plate 32 on the other end side in the width direction. It A hook 38 of an arm 36 formed at the left end of the sensing lever 34 in FIG. 3 is hooked on the protrusion 32B. The sensing lever 34 is formed so that its center of gravity is located on the left side in FIG. 3 with respect to the mounting position of the shaft member 40, and the sensing lever 34 is centered on the cylindrical body 40A in the direction opposite to the arrow A direction in FIG. Although a force to rotate is applied, as described above, the hook portion 38 is retained by the projecting piece 32B so that the hook portion 38 is held in the state shown in FIG.

A sensing portion 42, which is widened toward the tip, is formed at the right end portion of the sensing lever 34 in FIG. 3, and when the shutter curtain 10 is at the upper limit position, the sensing portion 42 is attached to the lintel portion 12. It comes into contact with the fixed block 46 (see FIG. 4) to rotate the sensing lever 34 in the direction of arrow A in FIG. When the lower surface of the sensing lever 34 contacts the obstacle or the floor surface 14, the left side of FIG. 3 protruding further downward 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 that reflects light is fixed, is fixed to the right upper surface of the seat plate 32. Corresponding to the reflection plate 48, a phototube 52 (see FIG. 1) that emits light toward the reflection plate 48 is mounted in the shutter case 44. The light emitted from the phototube 52 is reflected by the reflection plate 48 and is received again by the phototube 52. The photocell 52 is connected to the controller 28.

A shielding portion 58 is arranged near the reflection base 50. The shield 58 includes a base 60 having an opening 62, and a shield wall 54 that stands on the base 60 so as to surround the three sides of the reflector 48 and shields or prevents light from being scattered. It is being touched. A mounting portion 62 is formed at an end portion of the base portion 60, and the mounting portion 62 penetrates a long hole 64 formed in the shaft member 40 of the sensing lever 34, and a tip portion of the mounting portion 62 is fixed to the sensing lever 34. (See FIG. 3). Therefore, as shown in FIGS. 3 and 4, the shield 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. When moved, the shielding wall 54 shields the reflection plate 48 (see FIG. 4), and blocks the light emitted from the photoelectric tube 52 from entering the reflection plate 48.

As described above, the sensing lever 34, the photoelectric tube 52, the reflection plate 48, and the shield 58 form a seat plate switch, and the photoelectric tube 52 normally receives the light reflected by the reflection plate 48. A high-level signal is output from 52 to the control device 28 so that the sensing lever 34 abuts 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. When it comes into contact with an object, the light reflected by the reflection plate 48 is shielded, the light is not incident on the phototube 52, and the signal is switched to the 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 shield 58. ..

Further, as shown in FIG. 3, a stopper 66 is attached to the upper surface on the left side of the seat plate 32, and the lower end portion of the shutter curtain 10 is located at the upper limit regardless of whether the operation of the motor 22 is stopped. When this happens, the rise of the shutter curtain 10 is stopped and the push up of the shutter curtain 10 is prevented.

On the other hand, in the electric shutter of this embodiment, a normal mode and a teaching mode can be selected as a drive mode. The normal mode is selected during the normal operation of the electric shutter, and the shutter curtain 10 is moved according to the operation of the switches 26A, 26B, and 26C of the operation switch 26. The teaching mode is selected when the electric shutter is installed. As will be 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 actuated, the count value is set to a value corresponding to the origin position.

Next, the operation of this embodiment will be described. First, the pulse rising interrupt routine of this embodiment will be described with reference to the flowchart of FIG. It should be noted that this interrupt routine is executed by being interrupted 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 the direction to open the shutter curtain 10. If the determination in step 130 is affirmative, in step 132, "1" is added to the pulse count value P stored in a writable memory (for example, RAM) not shown. On the other hand, when the determination at step 130 is negative, the routine 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 drive mode currently set is the teaching mode. When the determination in step 100 is affirmative, the driving of the motor 22 is stopped in step 102. In the next step 104, it is determined whether or not the switch 26B for moving the shutter curtain 10 in the closing direction (downward direction) has been 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 positive. When the determination at step 104 is affirmative, the routine proceeds to step 106, where the motor 22 is driven in the direction to close the shutter curtain 10. In the state of the seat plate switch at this time, the light emitted from the photoelectric tube 52 is reflected by the reflecting plate 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 actuated, that is, whether or not the signal output from the photoelectric tube 52 has switched to the low level. When the determination in step 108 is negative, the process returns to step 104, and steps 104 to 108 are repeated until the seat plate switch operates.

Further, when the switch 26B is turned off before the seat plate switch is operated, steps 102 and 104 are repeated again. In this way, the seat plate switch operates and only the movement of the shutter curtain 10 in the closing direction is permitted until the determination in step 108 becomes affirmative. When the sensing lever 34 of the seat plate switch comes into contact with the floor surface 14, the shielding wall 54 is inserted between the photocell 52 and the reflection plate 48, the output signal of the photocell 52 becomes low level, and the determination in step 108 is affirmative. To be done. If the determination in step 108 is affirmative, the process proceeds to step 110, and the driving of the motor is stopped in step 110.

In the next step 112, “0” is set to the pulse count value P stored in the memory as a value corresponding to the original point position. In step 114, 0 is set in the area for storing the count value of the pulse at the lower limit position provided on the memory in the same manner as above. In step 116, the number of pulses p _max when the maximum movement amount stored in advance in the memory is set in the area for storing the count value of the pulse at the upper limit position provided on the memory. Thus, the processing in the teaching mode is completed, and the process returns to step 100. Therefore, when the electric shutter is installed, the operation of the operator is to remove the obstacle, if any, on the movement trajectory of the shutter curtain 10, select the teaching mode and move the switch 26B to move the shutter curtain 10 in the closing direction. Just turn it on.

On the other hand, when 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, the shutter curtain 10 is moved in the opening direction (upward direction). It is determined whether the switch 26A for moving the switch 26A or the switch 26B for moving the switch 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 the pulse count value P is equal to or greater than the pulse count value (p _max ) at the upper limit position.

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

As described above, in this embodiment, when the sensing lever 34 of the seat plate switch is in contact with the floor surface 14, the count value is set to a value corresponding to the origin position, that is, 0, and when the count value becomes 0, , Or because the movement of the shutter curtain 10 is stopped when the value reaches the value p _max corresponding to the maximum movement amount, the position of the limit switch can be finely adjusted when the electric shutter is installed, or the shutter curtain can be moved to the origin position. Since it is not necessary to manually set the count value while it is located at, it is possible to easily install the electric shutter. Further, since the seat plate switch for detecting an obstacle is used for detecting the origin position, a limit switch etc. is not necessary and the structure 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. Further, 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 when the motor 22 is driven in the direction to close the shutter curtain 10. Although 1 is subtracted from the count value, it may be subtracted when driving in the opening direction and may be added when driving in the closing direction.

Although the origin position is the lower limit position in this embodiment, the origin position may be the upper limit position. Further, in this embodiment, when the seat plate switch is activated and the shutter curtain reaches the lower limit position, the count value is changed to a value corresponding to the origin position. The count value when the curtain reaches either the upper limit position or the lower limit position is stored as a value corresponding to the origin position, and the count value is the value corresponding to the origin position or the value that is the maximum movement distance from the value. When, the movement of the shutter curtain may be stopped.

[0033]

[Effect of the device]

 As described above, in the present invention, when the seat plate switch is actuated and it is determined that the shutter curtain has reached either the upper limit position or the lower limit position, the value corresponding to the origin position is set, and Stop the movement of the shutter curtain when the count value of the pulse generated according to the rotation reaches 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. As a result, the excellent effect that the installation work of the electric shutter can be performed easily is obtained.

[Brief description of drawings]

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

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

FIG. 3 is a 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 operating.

FIG. 5 is a flowchart illustrating a process of a main routine of this embodiment.

FIG. 6 is a flowchart illustrating a process of a pulse rising interrupt routine of this embodiment.

[Explanation of symbols]

 10 Shutter Curtain 23 Rotary Encoder 26D Setting Switch 28 Control Device 34 Sensing Lever 48 Reflector 52 Photoelectric Cell 54 Shielding Wall

Claims (1)

[Claims for utility model registration] Claims: 1. Pulse generating means for generating a pulse in response to rotation of an opening / closing device for moving a shutter curtain; and counting means for counting the number of pulses generated by the pulse generating means. A seat plate switch that is attached to the lower end of the shutter curtain and that operates when the shutter curtain reaches at least one of the upper limit position and the lower limit position or when it contacts an obstacle between the upper limit position and the lower limit position, and a seat plate switch. When the shutter curtain is activated and it is determined that the shutter curtain has reached either the upper limit position or the lower limit position, setting means for setting the value corresponding to the origin position and the number of pulses corresponding to the maximum movement amount of the shutter curtain are stored. Non-volatile storage means, and the count value of the counting means corresponds to the origin position or the origin position Electric shutters and 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 corresponding values.