JPH0736597U - Direction control device - Google Patents

Abstract

(57) [Summary] [Purpose] The direction of the device can be easily controlled, and even when the control unit runs out of control, the device is securely stopped at the movable limit position to improve safety. [Structure] At least one stepping motor 5 capable of bidirectional rotation is driven and controlled by a control unit 9 and an instrument 3
Direction control device 1 which controls the direction of the instrument 3 and also provides limit switches 11 at movable limit positions in both directions of rotation of the instrument 3, and detects the movable limit position of the instrument 3 by the limit switch 11. 9 causes the drive pulse generation unit 10 to output a rotation permission signal and a clock signal for the motor 5, and a rotation permission signal indicating the rotation direction of the motor 5 and a limit switch 11 between the control unit 9 and the drive pulse generation unit 10. The drive stop circuit 13 for stopping the clock signal to stop the rotation of the motor 5 to the side where the limit switch 11 is operated is provided by the signal from the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direction control device, and more particularly to a direction control device that controls the direction of an attached instrument using a stepping motor.

[0002]

[Prior art]

 Conventionally, directional lighting fixtures and other fixtures that have been used by being fixed to structures such as the ceiling can be changed in direction in order to save labor and labor. An increasing number of cases are built into and attached to control devices. This is because, for example, when a fixture such as a lighting fixture installed in a store needs to change the direction of the fixture due to redesign of the store or changes in exhibits, the fixture must be removed each time. This is because it is extremely uneconomical to change the mounting direction by using not only manpower but also manpower. Further, as a means for controlling the direction of the instrument of such a direction control device, various kinds of motors are used, and one using a synchronous (synchronous) motor or a stepping motor is known.

2 to 4 show a conventional direction control device 1 (first conventional example) using two synchronous motors as motors. The direction control device 1 includes a device body 2 and a device. The tool 3, the mounting leg 4, and the first motor 5 and the second motor 6 are configured, and the synchronous motors 5 and 6, which are the first and second motors thereof, are shown in FIG. As shown in, by switching the switch S and connecting the capacitor C, the phase of the current flowing from the commercial power source AC to the coils La and Lb is changed, and the motor is rotated forward in the CW direction or in the CCW direction. ing. In the figure, Sa and Sb indicate limit switches provided at predetermined positions in the respective rotation directions.

The apparatus main body 2 is substantially U-shaped, has a space inside, and has a pair of facing portions 2 a facing each other with a space therebetween, and the pair of facing portions 2 a is one end side on the upper side. A synchronous motor 5, which is a first motor, is attached near the lower side, which is the other end side of one facing portion 2a, and is formed by a connecting portion 2b that is integrally connected. The rotating shaft 5a of the shaft 5 extends toward the facing facing portion 2a, and its end portion is inserted into and supported by a hole provided in the other facing portion 2a and is rotatable by the rotation of the first motor 5. It is configured like this. In addition, inside the main body 2 of the device, a control unit for the first and second motors 5 and 6, and a power supply unit (not shown) including a transformer and the like are also incorporated, and further, inside the connecting unit 2b. A synchronous motor 6, which is a second motor, is attached to the.

The lighting fixture 3, which is a fixture, has a lighting component such as a lamp inside, and one end of the lighting fixture 3 is fixed to the rotating shaft 5 a of the first motor 5 so that a pair of facing parts of the device body 2 are provided. 2a and has a light projecting portion 3a on the other end side, and the device 3 rotates about the rotation shaft 5a of the first motor 5 by the rotation of the first motor 5. However, the direction of the light projecting portion 3a is changed.

The mounting leg 4 is disposed on the non-opposing portion 2a side which is the upper side of the connecting portion 2b of the apparatus body 2 and near the substantially central portion of the connecting portion 2b. It is configured so as to be rotatable with respect to the apparatus main body 2 without being fixed to 2. Further, the rotary shaft 6a of the second motor 6 is arranged inside the mounting leg 4, and the second motor 6 is arranged inside the connecting portion 2b where the mounting leg 4 is arranged as described above. 6 is attached. Further, inside the mounting leg 4, power lines (not shown) to the first and second motors 5 and 6 and the control unit are also wired.

That is, the second motor 6 is fixed to the connecting portion 2b of the device body 2, the rotary shaft 6a of the second motor 6 is inserted into the mounting leg 4, and the non-device body 2 side At one upper side, it is fixed to a mounting leg 4 or a mounting plate (not shown) located on the non-device main body 2 side, and the mounting leg 4 is a rotary shaft 6a of the second motor 6 and a second motor. It is connected to the apparatus body 2 via the body 6 and is not directly fixed to the apparatus body 2. Therefore, when the second motor 6 rotates, the device body 2 rotates about the rotation shaft 6 a of the second motor 6.

That is, the luminaire 3, which is a fixture, is rotated in the vertical direction by the rotation of the first motor 5, and is rotated in the horizontal direction by the rotation of the device body 2 by the rotation of the second motor 6. That is, the direction of the light projecting unit 3a, which is the direction of the lighting fixture 3, is controlled.

In the direction control device 1 configured as described above, the device 3 is provided in order to prevent disconnection due to kinking or bending of the power supply line, or due to restrictions on the shape and structure of the device body 2 and the device 3. Of the first and second motors 5 and 6 are provided with one limit switch in the CW direction movable limit position and one limit switch in the CCW direction movable limit position, respectively. When the limit switch operates, the limit switch shuts off the motor power to stop the motor from rotating in the direction in which the limit switch operated. Although not shown, in the case of the first motor 5, two limit switches are fixed to the facing portion 2a of the device main body 2 near the rotary shaft 5a, and the first motor 5 The contact piece attached to the rotating shaft 5a of the first motor abuts, and the angle formed by the line connecting the two limit switches and the rotating shaft 5a of the first motor 5 is about 90 degrees. And the angle is set as the movable range of the instrument 3 by the first motor 5. Similarly, the movable range of the second motor 6 is about 270 degrees.

The direction control device 1 thus configured is usually controlled by a wireless remote controller or the like, and by operating the key 7a of the transmitter 7 as shown in FIG. The direction of light is controlled to change the direction of light emission, and blinking or dimming control is performed. That is, the signal from the transmitter 7 received by the remote control receiver 8 is sent to the controller, and the controller determines whether the signal is the direction control signal or the dimming signal of the lighting fixture 3. If the signal is a direction control signal, the target motor is rotated to change the direction of the device 3. Therefore, in such a direction control device 1, while the key 7a of the transmitter 7 of the wireless remote controller is being pressed, the transmitter 7 repeatedly transmits the control signal, and the first and second motors 5 and 6 rotate. The rotation of the luminaire 3 attached to the luminaire 3 can be changed within the range in which the limit switch does not operate.

FIGS. 5 to 7 show another conventional direction control device 1 (second conventional example). The difference from the conventional example is that two stepping motors are used as the first and second motors. The points 5 and 6 are used and the method of driving the motor associated therewith, and the other configurations are the same as those of the conventional example.

The control unit (CPU) 9 has a clock signal generation unit (not shown) inside, and the drive pulse generation unit 10 connected thereto rotates the stepping motors 5 and 6 in the CW or CCW direction. A permission signal and a clock signal are output to drive and control the stepping motors 5 and 6. The clock signal is generated by a built-in timer, and the rotation permission signal is usually latched by a flip-flop. In the direction control device 1 configured as above, even if the lighting fixture 3 reaches the movable limit position and the limit switch 11 operates, the limit switch 11 directly shuts off the driving power of the stepping motors 5 and 6. When the limit switch 11 operates when the limit switch 11 is connected to the control power supply without connecting the limit switch 11 to the drive power supply of the stepping motors 5 and 6 In this case, the control unit 9 reads the state of the limit switch 11 and stops the rotation of the stepping motors 5 and 6 in the direction of the limit switch 11 operated by the software of the control unit 9.

The drive pulse generator 10 counts the input clock signals to output a drive pulse having a predetermined time width to the drive unit 12. The drive unit 12 outputs the drive pulse width. According to the above, an exciting current is supplied to the coils of the stepping motors 5 and 6 to drive and control the motors.

[0014]

[Problems to be solved by the device]

 However, in the conventional direction control device 1 (first conventional example) configured in this way, the first and second motors 5 and 6 are synchronous motors, and their rotation speeds are constant, When controlling the direction of the device 3, there was a problem that the speed could not be adjusted for fine adjustment, and it was difficult to control the direction of the device 3.

Further, in another conventional direction control device 1 (second conventional example), since the clock signal is generated by the built-in timer and the rotation permission signal is latched by the flip-flop, the limit switch 11 Even when the above-mentioned operation is performed, there is a problem that the rotation of the stepping motors, which are the first and second motors 5 and 6, may not be stopped when the microcomputer constituting the control unit 9 runs out of control.

The present invention has been made to solve such a problem, and an object of the present invention is to easily control the direction of an instrument and to make the movable limit position even when the control unit is out of control. Another object of the present invention is to provide a highly safe directional control device that can reliably stop the device.

[0017]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a direction control device 1 according to claim 1, wherein at least one bidirectionally rotatable stepping motor 5 and a control unit for driving and controlling the stepping motor 5 are controlled. 9, an instrument 3 whose direction is controlled by being rotated by the stepping motor 5, and two limit switches 11 arranged at movable limit positions in both directions of rotation of the instrument 3, The direction control device 1 detects the movable limit position of the device 3 by a limit switch 11. The control unit 9 outputs a rotation permission signal for instructing the rotation direction to the stepping motor 5, and The rotation permission signal and the rotation permission side of the stepping motor 5 indicated by the rotation permission signal are arranged between the control unit 9 and the stepping motor 5. A drive stop circuit 13 is provided to stop the rotation of the stepping motor 5 to the side on which the operated limit switch 11 is arranged when the limit switch 11 is operated by a signal from the limit switch 11. It is characterized by that.

Further, in the invention according to claim 2, a clock signal for determining a drive pulse width of the stepping motor 5 is output from the control unit 9, and the drive stop circuit 13 is connected to the stepping circuit. A first AND circuit 13a for taking a logical product of a rotation permission signal of the motor 5 in one arbitrary direction and a signal from a limit switch 11 arranged at a movable limit position in the one direction, and the rotation permission signal. A second AND circuit 13b which performs a logical product of the inversion signal of the above and the signal from the limit switch 11 arranged at the movable limit position in the other direction of the stepping motor 5, and the first AND circuit. 13a and an output of the second logical product circuit 13b, the logical sum circuit 13c, and a third logical product of the output of the logical sum circuit 13c and the clock signal And a circuit 13d. When the limit switch 11 operates, the clock signal is stopped by the third logic circuit 13d, and the stepping to the side where the operated limit switch 11 is arranged is performed. The feature is that the rotation of the motor 5 is stopped.

[0019]

[Action]

 With the above configuration, in the device according to the first aspect, the control unit 9 outputs the rotation permission signal for instructing the rotation direction to the stepping motor 5, and also the control unit 9 and the stepping motor 5 Between the rotation permission signal and the signal of the limit switch 11 arranged on the rotation permission side of the stepping motor 5, the side on which the limit switch 11 is operated when the limit switch 11 is operated. Since the drive stop circuit 13 for stopping the rotation of the stepping motor 5 is provided, the rotation of the stepping motor 5 can be easily controlled, the direction of the instrument 3 can be easily controlled, and when the limit switch 11 is operated, the control is performed. Even if the unit 9 runs out of control, the drive stop circuit 13 located between the control unit 9 and the stepping motor 5 Ri is driven reliably stops the stepping motor 5, the heat generation is prevented, increasing the safety of the direction control device 1.

Further, in the invention according to claim 2, a clock signal for determining the drive pulse width of the stepping motor 5 is output from the control section 9, and the drive stop circuit 13 is connected to the stepping circuit. A first logical product circuit 13a for performing a logical product of a rotation permission signal of the motor 5 in an arbitrary direction and a signal from a limit switch 11 arranged at a movable limit position in the one direction; A second logical product circuit 13b for taking a logical product of a rotation permission signal for the motor 5 in the other direction and a signal from the limit switch 11 arranged at the movable limit position in the other direction, and the first logical circuit. A logical sum circuit 13c that takes the logical sum of the output of the product circuit 13a and the output of the second logical product circuit 13b, and a third logical product that takes the logical product of the output of the logical sum circuit 13c and the clock signal. Since it is configured to include the circuit 13d, the rotation control of the stepping motor 5 is easy, the direction control of the instrument 3 can be performed easily, and the control unit 9 operates when the limit switch 11 in any one direction operates. Even if the vehicle runs out of control, the clock signal is surely stopped, the driving of the stepping motor 5 is surely stopped, the heat generation is prevented, and the safety of the direction control device 1 is enhanced.

[0021]

【Example】

 FIG. 1 shows an embodiment of a direction control device 1 according to the present invention. The difference from the second conventional example is that the stepping motor 5 stops rotating in that direction when the limit switch 11 operates. The drive stop circuit 13 is provided and the operation of the control section 9 is accompanied therewith.

As shown in FIG. 1, the drive stop circuit 13 is provided between the control unit 9 and the drive pulse generation unit 10. The drive stop circuit 13 includes the first AND circuit 13a and It is composed of a second AND circuit 13b, an inverter circuit 13e, an OR circuit 13c, and a third AND circuit 13d.

The first AND circuit 13a controls the control unit 9 when the rotation permission signal output from the control unit 9 indicates rotation of the stepping motor in the CW direction if the rotation permission signal is 1 and in the CCW direction if 0. The rotation permission signal output from 9 and the signal input from the control power supply via the first limit switch 11a, which is the CW-direction limit switch 11 of the stepping motor 5, are input and the logical product of them is calculated. The second AND circuit 13b is provided with a second limit signal which is a signal obtained by inverting the rotation permission signal by the inverter circuit 13e and the CCW direction limit switch 11 of the stepping motor 5 from the control power source. It is provided so that a signal inputted via the switch 11b is inputted and a logical product of them is taken.

The logical sum circuit 13c is provided to input the outputs of the first logical product circuit 13a and the second logical product circuit 13b and take the logical sum of them, and also the third logical product circuit 13c. The circuit 13d is provided so as to input the output of the logical sum circuit 13c and the clock signal output from the control unit 9 and take a logical product of them, and the output thereof together with the rotation permission signal together with the drive pulse generation unit 10 Is configured to be input to.

Accordingly, for example, when the control unit 9 outputs the rotation permission signal 1 in the CW direction of the stepping motor 5, when the first limit switch 11a is in the conductive state, the first AND circuit 13a Since both inputs are 1, 1 is output as an output. Therefore, the OR circuit 13c outputs 1 and the third AND circuit 13d outputs 1 regardless of the output of the second AND circuit 13b. The clock signal output from the control unit 9 is transmitted to the drive pulse generation unit 10. In addition, when the first limit switch 11a operates and becomes non-conductive, the signal input to the first AND circuit 13a via the first limit switch 11a becomes 0, so that the first limit switch 11a becomes 0. The logical product circuit 13a outputs 0, while the second logical product circuit 13b also receives the signal 0 obtained by inverting the rotation permission signal as one of the inputs, so that the output becomes 0, and the third logical product circuit 13a 13d outputs 0 regardless of the input of the clock signal from the control unit 9, and stops the input of the clock signal to the drive pulse generation unit 10. Therefore, the drive pulse generator 10 does not output the drive pulse for driving the stepping motor 5 and rotates the stepping motor 5 in the CW direction, which is the side where the first limit switch 11a is disposed. Is stopped, and in that state, it can only rotate in the CCW direction which is the opposite direction.

Similarly, when the CCW direction rotation permission signal 0 of the stepping motor 5 is output from the control unit 9, similarly, when the second limit switch 11b is in the conductive state, the second AND circuit. 13b inputs the inverted signal 1 of the rotation permission signal and the signal 1 from the control power source through the second limit switch 11b and outputs 1 as an output. Therefore, regardless of the output of the first AND circuit 13a. Instead, the OR circuit 13c outputs 1, and the third AND circuit 13d transmits the clock signal output from the control section 9 to the drive pulse generation section 10. When the second limit switch 11b operates and becomes non-conducting, the signal input to the second AND circuit 13b via the second limit switch 11b becomes 0. The logical product circuit 13b outputs 0, while the first logical product circuit 13a also receives the rotation permission signal 0 as one of the inputs, so that the output becomes 0, and the third logical product circuit 13d controls Regardless of the clock signal input from the unit 9, 0 is output, and the input of the clock signal to the drive pulse generation unit 10 is stopped. Therefore, the drive pulse generator 10 does not output the drive pulse for driving the stepping motor 5, and the stepping motor 5 in the CCW direction, which is the side where the second limit switch 11b is provided, is output. The rotation is stopped, and in that state, it can only rotate in the opposite CW direction.

As described above, in the direction control device 1 according to the present embodiment, the control unit 9 causes the stepping motor 5 to output the rotation permission signal for instructing the rotation direction, and at the same time, the control unit 9 and the stepping motor 5 are controlled. In the meantime, the limit activated when the limit switch 11 is activated by the rotation permission signal and the signal of the limit switch 11 arranged on the rotation permission side of the stepping motor 5 indicated by the rotation permission signal. A drive stop circuit 13 for stopping the rotation of the stepping motor 5 to the side where the switch 11 is arranged is provided, and the control unit 9 outputs a clock signal for determining the drive pulse width of the stepping motor 5 and stops the drive. The circuit 13 is arranged at the rotation permission signal of the stepping motor 5 in any one direction and the movable limit position in that one direction. AND circuit 13a that performs a logical product of the signal from the limit switch 11 that has been operated, a rotation permission signal to the other direction of the stepping motor 5, and a limit disposed at the movable limit position in the other direction. A second logical product circuit 13b that takes a logical product with the signal from the switch 11, and a logical sum circuit 13c that takes a logical sum of the output of the first logical product circuit 13a and the output of the second logical product circuit 13b. Since the output of the logical sum circuit 13c and the third logical product circuit 13d that takes the logical product of the clock signal are provided, the rotation control of the stepping motor 5 and the direction control of the instrument 3 can be easily performed. At the same time, when the arbitrary one-way limit switch 11 operates, the clock signal is always stopped and the driving of the stepping motor 5 is surely stopped even if the control unit 9 runs out of control. Te extra power supply and to the stepping motor 5, increases the exotherm proof up the safety of the direction control device 1.

In the above embodiment, the drive stop circuit stops the clock signal supplied to the drive pulse generator to stop the rotation of the stepping motor when the limit switch operates. The invention is not limited to this, and the invention may be carried out by stopping the base signal to the transistor for driving the stepping motor. Further, in each of the above-described embodiments, the illuminating device has been described as an example of the device, but the present invention is not limited to this, and any device having directionality such as a speaker can be used as the device. Needless to say, it may be one.

[0029]

[Effect of device]

 Since the direction control device of the present invention is configured as described above, in the device of the first aspect, the control unit causes the stepping motor to output the rotation permission signal for instructing the rotation direction. The limit switch that operates when the limit switch operates is provided between the control unit and the stepping motor by the rotation permission signal and the signal of the limit switch that is provided on the rotation permission side of the stepping motor. Since a drive stop circuit that stops the rotation of the stepping motor to the side where it is operated is provided, it is easy to control the rotation of the stepping motor, the direction of the device can be easily controlled, and when the limit switch operates, the control unit runs out of control. Even if it does, the drive stop circuit located between the control unit and the stepping motor causes It is driven reliably stop the terpolymer, the exotherm prevented, increasing the safety of the direction control equipment.

Further, in the invention according to claim 2, a clock signal for determining a drive pulse width of the stepping motor is output from the control unit, and the drive stop circuit is connected to an arbitrary one of the stepping motor. A first AND circuit that performs a logical product of a rotation permission signal in one direction and a signal from a limit switch arranged at a movable limit position in the one direction, and rotation permission in the other direction of the stepping motor. A second AND circuit for taking a logical product of a signal and a signal from a limit switch arranged at the other movable limit position, an output of the first AND circuit and the second AND circuit Since it is configured to include a logical sum circuit that takes the logical sum of the outputs of the above and a third logical product circuit that takes the logical product of the output of the logical sum circuit and the clock signal, the rotation control of the stepping motor is controlled. It is easy to control the direction of the instrument, and when the limit switch operates in any one direction, the clock signal is always stopped and the stepping motor is operated even if the control unit runs out of control. The drive of the is surely stopped, its heat generation is prevented, and the safety of the direction control device is enhanced.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a direction control device according to the present invention.

FIG. 2 is a main part perspective view showing a conventional direction control device (first conventional example).

FIG. 3 is a plan view showing the remote control transmitter of the above.

FIG. 4 is a circuit diagram of the above.

FIG. 5 is a principal block diagram showing another conventional direction control device (second conventional example).

FIG. 6 is a circuit diagram of the same as above.

FIG. 7 is a block diagram of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Direction control device 3 Instrument 5, 6 Stepping motor 9 Control part 11 Limit switch 13 Drive stop circuit 13a 1st AND circuit 13b 2nd AND circuit 13c OR circuit 13d 3rd AND circuit

Claims (2)

[Scope of utility model registration request] 1. A bidirectionally rotatable stepping motor, a control unit for driving and controlling the stepping motor, an instrument whose direction is controlled by the stepping motor, and both directions of rotation of the instrument. And a limit switch disposed at the movable limit position of, and a direction control device configured to detect the movable limit position of the instrument by the limit switch,
The control unit outputs a rotation permission signal for instructing a rotation direction to the stepping motor, and between the control unit and the stepping motor, the rotation permission signal and the rotation permission side of the stepping motor indicated by the rotation permission signal. A drive stop circuit for stopping the rotation of the stepping motor to the side where the operated limit switch is arranged when the limit switch is operated by a signal from the arranged limit switch is provided. Direction control device. 2. A clock signal for determining a drive pulse width of a stepping motor is output from the control unit, and the drive stop circuit outputs a rotation permission signal to the stepping motor in any one direction and a rotation permission signal of the one direction. A first AND circuit for obtaining a logical product of a signal from a limit switch arranged at a movable limit position, an inverted signal of the rotation permission signal and a movable limit position in the other direction of the stepping motor. A second AND circuit that obtains a logical product with the signal from the limit switch, an OR circuit that obtains the logical sum of the output of the first AND circuit and the output of the second AND circuit, and the logical AND circuit. The output of the sum circuit and a third logical product circuit that takes the logical product of the clock signal are provided, and when the limit switch operates, the clock signal is stopped by the third logical circuit. The directional control device according to claim 1, wherein the stepping motor is stopped from rotating toward the side where the operated limit switch is arranged.