JPH02116317A - Carrier device - Google Patents

Abstract

PURPOSE:To execute the automatic stop of a power source in the travel edge part of a self-travelling vehicle without fail and to eliminate a signal line for the stop detection of the self-travelling vehicle by detecting the presence and a absence of a noise in a motor from a power source line and stopping the electrification to the motor in responding to the detecting output of the noise absence. CONSTITUTION:A self-travelling vehicle 1 starts travelling in the curtain closing or opening direction of a curtain rail 5 by the driving of a built-in motor according to the start of power supply to a power source line 34. However, the noise is simultaneously generated in the rectifier part of the motor. This noise is returned through the power source line 34 to a travel detecting circuit 46. When the self-travelling vehicle 1 hits a stopper and stops in the travelling edge, the motor goes to a lock condition and the generation of the noise is stopped. Thus, the output of a comparator CP in the travel detecting circuit 46 goes to a low level. By this power stop signal of the low level, a main control part 47 turns off a power supply relay 49 and stops the motor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a conveying device that is applied to opening and closing curtains and blinds, and conveying various other articles.

[Prior Art] Conventionally, as a curtain opening/closing device, there is a device in which a self-propelled vehicle equipped with a motor is installed on a curtain rail, and the self-propelled vehicle pulls the curtain to open and close it.

When the self-propelled vehicle reaches the running end, the power supply is automatically stopped. There are two methods for detecting the reaching of the running end: (a) using a limit switch; and (b) determining based on the difference between the motor lock current and the running current at the running end.

(Problem to be solved by the invention) However, in the method using a limit switch, it is difficult to operate reliably at the running end due to processing and assembly reasons, and it is also prone to deterioration over time, resulting in poor reliability. ,Moreover,
The wiring of the signal lines connected to the limit switch is wide-ranging, which causes problems such as disconnections and the impossibility of achieving a clean appearance.

With the method of detecting increases and decreases in motor current, comparison becomes difficult if there are fluctuations in the load of the self-propelled vehicle. In particular, it is difficult to compare current values when multiple self-propelled vehicles are operated with the same power supply due to the addition of curtains, etc. In other words, when there are multiple self-propelled vehicles, the current value level changes significantly, and each self-propelled vehicle There is a lag when locking or starting between cars. Therefore, it is difficult to compare current values during lock and normal operation, which often leads to malfunctions.

An object of the present invention is to provide a conveyance device that can reliably automatically stop the power supply at the end of a self-propelled vehicle, and that can detect stoppage using only a power line without the need for a signal line for detecting the stoppage of a self-propelled vehicle. It is to provide.

[Means to solve the problem]

The conveyance device of the present invention is a conveyance device that allows a self-propelled vehicle having a motor to travel along a track, and is provided with a travel detection circuit that detects the presence or absence of motor noise from a power line, and responds to the detection output of the absence of noise. The motor is equipped with a power supply control means for stopping power supply to the motor.

[Effect]

According to the configuration of this invention, the following effects can be obtained.

When a self-propelled vehicle is running, the motor is rotating, which generates noise from the commutator. This noise is superimposed on the voltage of the power line, and the noise component is extracted from the power line by the running detection circuit. When the self-propelled vehicle hits the running end of the track and stops, the motor becomes locked, and the noise is generated as it rotates. Motor noise is eliminated. The running detection circuit detects this change from presence to absence of noise and outputs a detection signal. In response to this detection signal, the power supply control means stops energizing the motor.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 7.

FIG. 3 shows an example of a curtain opening/closing device to which the conveying device of the present invention is applied. A self-propelled vehicle 1 is movably installed on a curtain rail 5 on which a curtain 3 is suspended, and one end of the curtain 3 is connected to the self-propelled vehicle 1 via an arm 28. The curtain rail 5 also serves as a track for the self-propelled vehicle 1. Stoppers 4 are provided at both running ends of the curtain rail 5, and a power supply connection line 34a is drawn out from one end.The power supply connection line 34 is connected to the control device 4.
2, and the control device 42 is connected to a commercial power supply via a cord 41.

As shown in FIGS. 4 and 5, the curtain rail 5 has a downward lip groove shape, and the lip portion 6 is provided with a self-propelled vehicle.
The running roller 7 is placed on the roller. A rack 8 is provided on the lower surface of the top plate of the curtain rail 5 at the center in the width direction over the entire length. The self-propelled vehicle 1 has a pinion 12 that meshes with the rack 8.
The curtain rail 5 is equipped with a DC motor lO that drives the pinion 12 and the curtain rail 5.
drive along the Further, a pair of trolley wires 43 are provided on the lower surface of the upper plate of the curtain rail 5, and a collector 45 that collects current from the trolley wires 43 and supplies power to the motor 10 is provided in the self-propelled vehicle 1.

A clutch mechanism 11 that is engaged and disengaged by a solenoid 25 is provided between the motor 10 and the pinion 12, so that the curtain 3 can be freely opened and closed without the motor 10 acting as resistance when the motor 10 is stopped.

The clutch mechanism 11 will be explained. Output shaft 15 of motor 10
A deceleration worm 16 is attached to the worm wheel 17, which is engaged with the worm wheel 17.
Rotatably attached to. As shown in FIG. 6, the pinion 12 is rotatably fitted onto the sleeve part 19 of the worm wheel 17 on the sleeve part 1. These sleeve portions 18.
The protrusions 24 of the clutch plate 23 are releasably fitted into the recesses 20 and 21 of the clutch plate 19, thereby transmitting rotation between the worm wheel 17 and the pinion 12. The clutch plate 23 is externally fitted onto the support shaft 14 passing through the worm wheel 17 so as to be rotatable and movable in the axial direction, and is biased by a release spring 22 in a detachment direction (a direction away from the pinion 12). clutch plate 23
The tip of a swinging arm 26 (FIG. 5) supported by the frame 13 is in contact with the back surface of the swinging arm 26, and the solenoid 25 is connected to the swinging arm 26 via a buffer spring 27.

The solenoid 25 is connected to the same IT terminal 45 as the motor 10, and when the motor 10 is driven, that is, the trolley &91
The suction operation is performed when power is supplied to 43. This suction action causes
The clutch plate 23 is moved to the engaged position via the swing arm 26, allowing drive transmission from the motor 10 to the pinion 12. When the power supply to the motor 10 is stopped, the solenoid 25 becomes de-energized, and the tarlatch plate 23 is disengaged by the bias of the release spring 22.

FIG. 1 shows an electric circuit of the control device 42. A trolley wire 43 of the curtain rail 5 is connected to a power supply connection line 34a, and these trolley wires 43 and the power supply connection line 34a form the power supply line 34. The power line 34 has a polarity switching relay 35,
It is connected to the power supply circuit 4 via a power supply relay 49 which is a power supply control means. The power supply circuit 48 obtains a DC voltage from an AC commercial power supply, and also serves as a power source for each circuit component of the control device 42. The polarity switching relay 35 switches the positive and negative polarities of power supplied to the trolley wire 43, and by this switching, the direction of rotation of the motor 10 is changed and the running direction of the self-propelled vehicle 1 is changed to the direction in which the curtain 3 is closed and the direction in which the curtain 3 is opened. Can be done.

The running detection circuit 46 is connected to the motor 1 superimposed on the power supply line 34.
0 noise is detected, and a power stop signal, which is a detection output, is input to the main control section 47. The main control section 47 consists of a microcomputer, and the running detection circuit 4
6 and the operation signal inputted from the remote control transmitter 50 via the receiver 31 and the ink face 32, a predetermined judgment described later is made and a control signal is output to the power supply relay 49 and the polarity switching relay 35. do.

The remote control transmitter 50 is of an infrared type or the like, and sends operation signals for opening and closing the curtain 3.

As shown in FIG. 2, the running detection circuit 46 extracts the noise component from the power line connection terminal a through the filter CI, and includes a differential amplifier 52, an integrating circuit 53, and a comparator CP. There is. The differential amplifier 52 has a DC power supply Vcc divided by a resistor R1R1 and connected to the non-inverting input terminal of the operational amplifier A, and an input-side resistor R1 and a feedback resistor R4 connected to the inverting input terminal. . Integrating circuit 53 consists of capacitor C2 and resistors R9 and R6.

The comparator CP divides the DC power supply Vcc with a resistor R1Ra to obtain a reference voltage, and is connected to an inverting input terminal.

The output of the integrating circuit 53 is connected to the non-inverting input terminal.

The operation of the above configuration will be explained. First, automatic stopping at the running end will be explained. With the start of power supply to the power line 34, the self-propelled vehicle 1 starts running in the curtain closing or opening direction of the curtain rail 5 by driving the built-in motor 10, but at the same time, noise is generated in the commutator section of the motor IO. do. This noise is returned to the running detection circuit 46 through the 1aB line 34.

In the running detection circuit 46, the power line 34 is connected by the filter C9.
This noise component is amplified by a differential amplifier 52 and then integrated by an integrating circuit 53. This integrated value is compared with a reference voltage obtained by resistors Rt and R- by a comparator CP.

While there is noise from the motor IO, the integrated value of the noise component input to the comparator CP is higher than the reference voltage, and the output of the comparator CP is at a high level.

When the self-propelled vehicle 1 hits the stopper 4 at the running end and stops, the motor 10 is in a locked state and the generation of noise is stopped. Therefore, the comparator C of the running detection circuit 46
The output of P becomes low level. This low-level power stop signal causes the main control unit 47 to control the power supply relay 49.
is turned off, and the motor 10 is stopped.

Next, the opening/closing operation by the remote control transmitter 50 and the operation of the main control section 47 will be explained. The remote control transmitter 50 is
Outputs operation signals for opening and closing the curtain 3. The receiver 31 receives this operation signal, transmits it to the interface 32, and inputs it to the main control section 47.

FIG. 7 shows the operation of the main control section 47. 31 to S indicate steps of each operation. The main control unit 47 waits for the output of the interface 32 to become high level (H) (S,), and when it becomes high level, determines whether the signal is a close signal or not (S2).

When it is a close signal, output a control signal that turns off the polarity switching relay 35 (S,), and when it is not a close signal, output a control signal that turns on the polarity switching relay 35 (S,).
. Then, a control signal is output to turn on the power supply relay 49 (S4). When the power supply relay 49 is turned on, the self-propelled vehicle 1 runs in the direction determined by the lossy switching relay 35 .

After maintaining the operating state for 0.5 seconds (Ss), the power stop signal of the running detection circuit 46 goes to low level (Ss).
When the self-propelled vehicle 1 reaches the running end, the running detection circuit 46 outputs a low-level power stop signal as described above. This power stop signal causes the power supply relay to Outputs a control signal to turn off 49 (S,
). Therefore, the self-propelled vehicle 1 stops. After this, the process returns to step (Sl).

This conveyance device operates the self-propelled vehicle 1 by operating the remote control transmitter 50 to open and close the curtain 3, and automatically stops the power supply when the self-propelled vehicle 1 reaches the end of travel. It can be performed.

The automatic stop is determined by detecting the stop of the motor IO based on the presence or absence of noise in the motor IO as described above, so there is no need for low-precision parts such as limit switches, and it is possible to accurately stop at the running end. can be detected. Further, unlike the method in which the lock current of the motor 10 is compared with a steady current, a stopped state can be detected regardless of the magnitude of the load on the motor 10, and from this fact as well, accurate detection can be achieved.

Moreover, since the noise of the motor 10 can be detected from the power supply line, a signal line for a stop detection signal is not required. Therefore,
Coupled with the fact that a limit switch is not required, the appearance is neat, and the beauty of the area around the curtain rail 5, which is important for interior decoration, can be improved.

FIG. 8 shows another embodiment. In this example, the curtain 3 is opened on both sides, and two self-propelled vehicles 1 are installed on the curtain rail 5.
(FIG. 5), and the motor 10 and collector 45 are connected so that they run in opposite directions.

In this case, the power supply is stopped when both self-propelled vehicles 1 reach the running end, the motor 10 stops, and the noise disappears. By controlling the controller in this way, the trolley wire 4
Regardless of the number of self-propelled vehicles 1 installed at 3, automatic power supply stop at the running end can be accurately performed. The motor of the self-propelled vehicle 1 that reaches the running end first remains locked for a while, but the waiting time is not too long, and the motor 10 usually has a built-in thermoswitch to prevent overheating, so there is no problem of burnout. do not have. Other structural effects are the same as in the first embodiment.

Although the above embodiment has been described with reference to the application to a curtain opening/closing device, the present invention can also be applied to opening/closing blinds and transporting various other articles. Also,
Although the trolley wire 43 was used in the embodiment, a flexible power supply line may be connected to the self-propelled vehicle 1. Further, the running detection circuit 46 may directly operate the power supply relay 49 without going through the main control section 47.

FIG. 9 shows a proposed example of a conveying device that can achieve the same purpose as the present invention.
This is a case where an induction motor is used as the motor 10', and a generator G is connected to the output shaft of the motor 10'. The generator G is a high-frequency generator that generates an alternating current voltage with a frequency of, for example, 10 times or more the rotation speed of the motor 10', and its output is superimposed on the power line 34 via the filter C3. The superimposed signal of the generator G is sent to the running detection circuit 4 via the filter C4.
Detected by 6. The other configurations are similar to the first embodiment.

In this configuration, when the self-propelled vehicle I is running, a voltage in which a high frequency signal generated by the generator G is superimposed on the frequency of the commercial power source appears on the power line 34. This high frequency signal is transmitted to the driving detection circuit 4.
6 and know that it is running. When the motor 10' is stopped, the waveform of the power line 34 is determined only by the frequency of the commercial power source, so it is determined that the motor 10' is stopped, and the power supply is stopped.

〔Effect of the invention〕

The conveying device of the present invention detects the stoppage of rotation based on the noise accompanying the rotation of the motor, so detection can be performed without being affected by assembly accuracy or load fluctuations. Therefore, it is possible to accurately detect the stop of the self-propelled vehicle at the end of its travel, and it is possible to reliably perform automatic power shutoff. Furthermore, even when a plurality of self-propelled vehicles are driven by the same power line, detection can be performed regardless of the number of vehicles. Moreover, since the noise of the motor is superimposed on the power supply line and can be detected from the power supply line, there is no need for a signal line to send a stop state detection signal, and automatic stopping can be performed using only the power supply line.

Therefore, there are no problems such as wire breakage, high reliability, and a clean appearance.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of a conveying device according to an embodiment of the present invention;
Fig. 2 is an electric circuit diagram of the running detection circuit, and Fig. 3 is a front view of a curtain opening/closing device to which the conveying device is applied.
FIG. 4 is a partially enlarged cutaway front view of the same, FIG. 5 is a cross-sectional view thereof, FIG. 6 is an exploded perspective view of the clutch portion, FIG. 7 is an explanatory diagram of the operation of the main control portion, and FIG. FIG. 8 is a front view of another embodiment, and FIG. 9 is an explanatory diagram of a proposed example of the conveying device. l...Self-propelled vehicle, 3...Curtain, 4...Stopper, 5...Curtain rail which is a track, 10...Motor, 8...Rack, 12...Pinion, 34...・・・
Power line, 42...control device, 43...trolley wire,
45... Current collector, 46... Running detection circuit, 47...
・Main control unit, 48...power supply circuit, controller transmitter 49...power supply relay, 50...remote diagram

Claims (1)

[Claims] In a conveyance device that causes a self-propelled vehicle having a motor to travel along a track, a travel detection circuit is provided that detects the presence or absence of noise in the motor from a power line connected to the motor, and a noise-free detection signal of the travel detection circuit is provided. 1. A conveying device comprising: power supply control means for stopping energization of the motor in response to the power supply.