JP2007001667A - Winding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding machine capable of accurately informing device condition to an operator even if abnormal condition occurs in the device so as to quickly take an appropriate action. <P>SOLUTION: This winding machine 1 has a winding mechanism 4 for winding up and unwinding down the predetermined load by holding it, a driving motor 5 for driving the winding mechanism 4, a control circuit section 6 for controlling operation of the driving motor 5, and an operation pendant 12 for giving an operation command in relation to the winding mechanism 4 from the worker to the control circuit section 9. The operation pendant 12 is provided with a condition display lamp 17 for displaying device condition on the basis of a detection result of operating condition of the device. Power source voltage to be supplied to the driving motor 5 and the driving current of the driving motor 5 are detected, and the condition display lamp 17 is flashed in the predetermined cycle with the predetermined pattern on the basis of a result of the detection. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hoisting machine for holding and lifting a predetermined load and unwinding it.

FIG. 5 is a block diagram showing a configuration of a control system of a conventional hoisting machine.
As shown in FIG. 5, a conventional hoisting machine 101 has a hoisting mechanism (not shown in detail) 104 configured to raise and lower a hook part 103 by a wire (or chain) 102 in a main body part 101 a. The hoisting mechanism 104 is operated by the drive motor 105 based on the operation command from the operation pendant 112.

  The drive motor 105 is supplied with a direct current from an alternating current power supply 106 via a rectifier 107 and is controlled and driven by a motor driver 108. Here, the motor driver unit 108 is connected to a control circuit unit 109 formed of a microcomputer or the like, and receives a motor drive control output signal from the control circuit unit 109.

  A motor overcurrent detection unit 110 is provided between the drive motor 105 and the motor driver unit 108. The motor overcurrent detection unit 110 is configured to detect whether or not the current flowing through the drive motor 105 exceeds a predetermined current value and output the data to the control circuit unit 109.

  In addition to the power lamp 116, the operation pendant 112 is provided with an up button 113, a down button 114, and an emergency stop button 115, and is configured to output each operation command to the control circuit unit 109 by an operator's operation. Yes.

  The main body 101a includes an overwind limit position detection unit 118 that detects that the hook portion 103 has reached the overwind limit position of the wire or chain 102, and a hook portion 103 that is the reverse winding limit position of the wire or chain 102. Is provided with a reverse winding limit position detection unit 119 for detecting the arrival at the overwinding and reverse winding limit position detection units 118 and 119, and outputs the information to the control circuit unit 109. Various abnormalities that occur can be detected.

Next, the circuit operation of the conventional hoisting machine 101 will be described.
After turning on the power, when a load (not shown) is suspended from the hook portion 103 of the hoisting machine 101 and the raising button 113 of the operation pendant 112 is turned on, the hook portion 103 moves upward. Similarly, when the lowering button 114 is turned on, the hook portion 103 moves downward.

  During this operation, when the hoisting machine 101 attempts to lift a load exceeding a predetermined load and the motor overcurrent detection unit 110 detects a current exceeding the upper limit current limit value of the motor current, the control circuit unit 109 Turns off the motor driver control output and stops the operation of the drive motor 105 in the same direction. Similarly, when the overwinding limit position detection unit 118 and the reverse winding limit position detection unit 119 detect the overwinding limit position and the reverse winding limit position arrival information, respectively, the drive motor 105 in the same direction is also detected. Stop operation.

However, such a conventional technique has the following problems.
(1) In the prior art, when the up and down buttons 113 and 114 are turned on, if the drive motor 105 does not operate for some reason or if an abnormality occurs in the operation of the drive motor 105, the operator is wound. Since the reason why the upper unit 101 does not operate is not known, it was not possible to take action to immediately remove the cause.

  For example, when the power cable (not shown) of the hoisting machine 101 is extended for a long time at a work site or the like, a voltage drop in the power cable becomes large, which causes a shortage of motor torque and a predetermined value. In such a case, the load cannot be lifted. In this case, the operator does not know the cause of the lack of torque of the drive motor 105 in the prior art, so take appropriate measures such as reviewing the power cable. I could not.

(2) When an operation failure occurs due to an external factor such as the voltage drop of the power supply described above and the product is returned as a defective product, the hoisting machine 101 itself has no abnormality, so that the failure state can be reproduced. Unable to do so, wasted repair time.

  The present invention has been made in order to solve the above-described problems. Even when an abnormality occurs in the apparatus, the present invention makes it possible for the operator to accurately know the state of the apparatus and to take an appropriate and prompt countermeasure. The purpose is to provide an aircraft.

In order to achieve the above object, the invention according to claim 1 is characterized in that a hoisting mechanism for holding up and unwinding a predetermined load, a drive motor for driving the hoisting mechanism, and the drive A hoisting machine having control means for controlling the operation of a motor and an operation unit for giving an operation command to the control means by an operator to the hoisting mechanism, wherein the operation state of the apparatus is A status indicator for displaying the status of the device based on the result of detecting the device is provided.
According to a second aspect of the present invention, in the first aspect of the invention, the status indicator has a status indicator lamp that can be turned on by changing the blinking cycle, and based on the result of detecting the operating status of the device. The status display lamp is configured to blink at a predetermined cycle.
According to a third aspect of the present invention, in the first or second aspect of the present invention, the apparatus includes a voltage detection unit that detects a power supply voltage supplied to the drive motor, and the operation unit includes the voltage detection unit. A status indicator for displaying the status of the device based on the result detected in step (2) is provided.
According to a fourth aspect of the present invention, in the first aspect of the present invention, a current detection unit that detects a drive current of the drive motor is provided, and the operation unit is detected by the current detection unit. A status indicator for displaying the status of the apparatus based on the result is provided.
According to a fifth aspect of the present invention, in the third aspect of the invention, the state indicator is configured to operate when a result detected by the voltage detection unit becomes smaller than a predetermined value. Features.
According to a sixth aspect of the present invention, in the third aspect of the present invention, the state indicator is configured to operate when a result detected by the voltage detection unit becomes larger than a predetermined value. Features.
According to a seventh aspect of the present invention, in the fourth aspect of the present invention, the state indicator is configured to operate when a result detected by the current detection unit becomes larger than a predetermined value. Features.
The invention according to claim 8 is the result of detecting the operation state of the apparatus according to any one of claims 1 to 7, wherein the state indicator has a state notification buzzer capable of sounding by changing the sounding period. The state notification buzzer is configured to sound at a predetermined cycle based on the above.

  In the present invention, the “status indicator” has a function of notifying the operator of various abnormalities occurring in the hoisting machine not only visually but also by hearing or touch.

  In the case of the present invention, since a status indicator that displays the status of the device based on the result of detecting the operating status of the device is provided in the operation unit, when various abnormalities occur in the device, The operator can know the state of the apparatus accurately, and this makes it possible to take an appropriate and prompt response action.

  Further, according to the present invention, when repair or maintenance of the hoisting machine is performed, a location where an abnormality has occurred can be accurately identified, so that repair and maintenance are facilitated.

  In the present invention, the status indicator has a status indicator lamp that can be turned on by changing the blinking cycle, and is configured to cause the status indicator lamp to blink at a predetermined cycle based on the result of detecting the operation state of the device. In this case, it is possible to display a plurality of device states with one state display lamp, and to simplify the device configuration.

  In the present invention, a voltage detection unit that detects a power supply voltage supplied to the drive motor or a current detection unit that detects a drive current of the drive motor is provided, and the operation unit has a result detected by the voltage detection unit or the current detection unit. When a status indicator for displaying the status of the device is provided based on the device, for example, an operator may be able to respond to an abnormal power supply voltage such as a power supply voltage drop or an overvoltage, or an abnormal drive current such as a motor overload. It is possible to know the condition accurately, and to take appropriate and prompt action.

  In this case, if the state indicator is operated when the result detected by the voltage detection unit becomes smaller than a predetermined value, the state of the device can be surely known when the power supply voltage drops abnormally. it can.

  Further, if the state indicator is operated when the result detected by the voltage detection unit becomes larger than a predetermined value, the state of the apparatus can be surely known when the power supply overvoltage is abnormal.

  Furthermore, if the state indicator is operated when the result detected by the current detection unit becomes larger than a predetermined value, the state of the apparatus can be surely known when the motor is overloaded.

On the other hand, in the present invention, the status indicator has a state notification buzzer that can be turned on by changing the sounding cycle, and the state notification buzzer sounds at a predetermined cycle based on the result of detecting the operation state of the device. If the system is configured so that the operator can quickly inform the operator of the state of the apparatus according to the situation, and a plurality of apparatus states can be displayed with one state display buzzer, Simplification can be achieved.
Furthermore, since the status of the device is notified by sound, if a device malfunction occurs at the site where the hoisting machine is installed, it is possible to directly notify the maintenance staff using a mobile phone or the like, for example. This makes it possible to take appropriate and prompt action.

According to the present invention, when various abnormalities occur in the apparatus, the operator can know the state of the apparatus accurately, and can take appropriate and prompt countermeasures.
Further, according to the present invention, when repair or maintenance of the hoisting machine is performed, a location where an abnormality has occurred can be accurately identified, so that repair and maintenance are facilitated.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a control system of a hoisting machine according to an embodiment of the present invention, and FIG. 2 is a block diagram showing an appearance of an operation pendant of the hoisting machine.

As shown in FIG. 1, the hoisting machine 1 according to the present embodiment includes a hoisting mechanism (not shown in detail) 4 configured to raise and lower a hook portion 3 by a wire (or chain) 2 and a main body portion 1a. Have.
As will be described later, the hoisting mechanism 4 is operated by the drive motor 5 based on an operation command from the operation pendant (operation unit) 12.

  This drive motor 5 is supplied with a direct current from an alternating current power source 6 via a rectifying unit 7 and is controlled and driven by a motor driver unit 8. Here, the motor driver unit 8 is connected to a control circuit unit 9 composed of a microcomputer or the like, and receives a motor drive control output signal from the control circuit unit 9.

  A motor current detection unit (current detection unit) 10 is provided between the drive motor 5 and the motor driver unit 8. The motor current detection unit 10 is configured to detect a current flowing through the drive motor 5 and output the data to the control circuit unit 9.

  Further, a motor power supply voltage detection unit (voltage detection unit) 11 is provided between the motor driver unit 8 and the rectification unit 7. The motor power supply voltage detection unit 11 is configured to detect a voltage supplied to the drive motor 5, particularly an overvoltage / undervoltage, and output the data to the control circuit unit 9.

  As shown in FIGS. 1 and 2, the operation pendant 12 is provided with an ascending button 13, a descending button 14, and an emergency stop button 15, so that each operation command is output to the control circuit unit 9 by the operation of the operator. It is configured.

  The operation pendant 12 of the present embodiment is provided with a power lamp 16 and a status display lamp (status indicator) 17, and the power lamp 16 and the status display lamp 17 are connected to the control circuit unit 9.

  The status display lamp 17 displays the status of the hoisting machine 1 and is configured to control lighting / extinguishing control, blinking cycle, and the like by software based on a signal from the control circuit unit 9.

  The main body 1a includes an overwinding limit position detection unit 18 that detects that the hook unit 3 has reached the overwinding limit position of the wire or chain 2, and the hook unit 3 is connected to the reverse winding limit position of the wire or chain 2. Is provided with a reverse winding limit position detecting unit 19 that detects that the winding has reached the control circuit unit 9 by outputting information from the overwinding and reverse winding limit position detecting units 18 and 19 to the hoisting machine 1. Various abnormalities that occur can be detected.

  In the present embodiment having such a configuration, when the load (not shown) is suspended from the hook portion 3 of the hoisting machine 1 after the power is turned on and the ascending button 13 of the operation pendant 12 is turned on, the hook portion 3 Works upward. Similarly, when the lowering button 14 is turned on, the hook portion 3 moves downward.

FIG. 3 is an explanatory diagram showing a blinking example of the status display lamp in the present embodiment.
As shown in FIG. 3, in the present embodiment, various states of the hoist 1 are displayed by changing the blinking cycle of the state display lamp 17.

  For example, when the emergency stop button 15 of the operation pendant 12 is pressed, the operation of the drive motor 5 is stopped by a command from the control circuit unit 9 and the status display lamp 17 is changed to (1) in FIG. Flashing is performed at the indicated flashing cycle (on for 0.5 seconds and off for 0.5 seconds), thereby displaying that the hoist 1 is in an emergency stop state.

  Also, based on a signal from the motor power supply voltage detection unit 11, for example, when it is determined that a state in which the motor power supply voltage has decreased and the motor drive torque cannot be sufficiently secured has occurred, an instruction from the control circuit unit 9 The status display lamp 17 blinks at a blinking cycle (0.5 seconds on-1.5 seconds off) shown in (2) of FIG. 3, whereby the hoisting machine 1 has a reduced motor power supply voltage. Display that it is in a state.

  On the other hand, if it is determined based on the signal from the motor power supply voltage detection unit 11 that the motor power supply voltage has risen and an overvoltage condition has occurred, the status display lamp 17 is displayed in response to a command from the control circuit unit 9 as shown in FIG. Flashing is performed at the flashing cycle shown in (3) (0.5 seconds on-0.5 seconds off-0.5 seconds on-1.5 seconds off), and the hoist 1 is in an overvoltage state. Is displayed.

  Further, when it is determined that the motor current has risen and an overcurrent state has occurred based on the signal from the motor current detection unit 10, the status display lamp 17 is displayed in accordance with a command from the control circuit unit 9 as shown in FIG. Flashing is performed at the flashing cycle shown in (4) (0.5 seconds on-0.5 seconds off-0.5 seconds on-0.5 seconds off), and the hoist 1 is in an overcurrent state. Is displayed.

  Further, when it is determined that the reverse winding state has occurred based on the signal from the reverse winding limit detection unit 18, the status display lamp 17 blinks as shown in (4) of FIG. Flashes in a cycle (0.5 seconds on-0.5 seconds off-1.5 seconds on-1.5 seconds off), thereby indicating that the hoist 1 is in a reverse winding state.

  As described above, according to the present embodiment, the operation pendant 12 is provided with the state display lamp 17 that displays the state of the device based on the result of detecting the operation state of the drive motor 5. When various abnormalities occur in the hoist 1, the operator can accurately know the state of the apparatus, and can take appropriate and prompt countermeasures.

  Further, according to the present embodiment, when repair or maintenance of the hoisting machine 1 is performed, a location where an abnormality has occurred can be accurately identified, so that repair and maintenance are facilitated.

  In particular, in the present embodiment, a state display lamp 17 that can be turned on by changing the blinking cycle is provided, and the state display lamp 17 blinks at a predetermined cycle based on the result of detecting the operation state of the drive motor 5. Therefore, a plurality of states can be displayed by one state display lamp 17, and the apparatus configuration can be simplified.

  In the present embodiment, the motor power supply voltage detection unit 11 that detects the power supply voltage supplied to the drive motor 5 and the motor current detection unit 10 that detects the drive current of the drive motor 5 are provided. Since the lamp 17 is made to blink at a predetermined cycle based on the result detected by the motor power supply voltage detection unit 11 or the motor current detection unit 10, an abnormality in the power supply voltage such as a decrease in power supply voltage or an overvoltage, a motor overload or the like. An operator can accurately know the state of the apparatus with respect to an abnormality in the drive current such as a load, and can thereby take an appropriate and prompt countermeasure.

  FIG. 4 is a block diagram showing the configuration of the control system of another embodiment of the hoist according to the present invention. Hereinafter, the same reference numerals are given to the parts common to the above embodiment, and the details thereof Description is omitted.

In the present embodiment, a state notification buzzer 17A for notifying various abnormalities occurring in the hoist 1 using sound is used.
The state notification buzzer 17A is provided on the operation pendant 12, and controls sounding / muffling control and sounding cycle by software based on a signal from the control circuit unit 9, and thereby the hoisting machine 1 It is configured to inform the state.

  In the present embodiment having such a configuration, for example, the state notification buzzer 17A is sounded when the state display lamp 17 of the above-described embodiment shown in FIG. 3 is ON.

According to the present embodiment, the operator can quickly and accurately know various abnormalities occurring in the hoist 1 according to the situation by the sound of the state notification buzzer 17A.
Further, since the state of the apparatus is notified by sound, when an abnormality of the apparatus occurs at the site where the hoisting machine 1 is installed, for example, a maintenance person can be directly notified of the state of the apparatus using a mobile phone or the like. This makes it possible to take appropriate and prompt action.
Since other configurations and operational effects are the same as those of the above-described embodiment, detailed description thereof is omitted.

The present invention is not limited to the above-described embodiment, and various changes can be made.
For example, the flashing example of the status display lamp or the sounding sound of the status display buzzer is an example, and the flashing cycle, the ON-OFF pattern or the sounding cycle, and the sound-silence pattern can be changed as appropriate.

  In addition, for the abnormalities other than the abnormalities described above, the status display lamp blinks at a predetermined flashing cycle or the status display buzzer can be determined in advance according to each abnormality or status occurring in the apparatus. It can be set to sound at a sounding cycle.

Furthermore, a plurality of status display lamps corresponding to the abnormality or state can be provided, and the abnormality or state can be displayed, for example, by characters.
However, from the viewpoint of simplifying the device configuration, it is preferable to use one status display lamp and change the blink cycle and blink pattern as in the above embodiment.

  Furthermore, a status display lamp and a status display buzzer can be provided in combination. In this case, for example, the blinking cycle and pattern of the status display lamp and the sounding cycle and pattern of the status display buzzer may be operated in synchronization.

It is a block diagram which shows the structure of the control system of embodiment of the winding machine which concerns on this invention. It is a block diagram which shows the external appearance of the operation pendant of the winding machine. It is explanatory drawing which shows the example of blinking of the status display lamp in this Embodiment. It is a block diagram which shows the structure of the control system of other embodiment of the winding machine which concerns on this invention. It is a block diagram which shows the structure of the control system of the conventional winding machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hoisting machine 3 ... Hook part 4 ... Hoisting mechanism 5 ... Drive motor 9 ... Control circuit part (control means) 10 ... Motor current detection part (current detection part) 11 ... Motor power supply voltage detection part (voltage detection part) 12 ... Operation pendant (operation unit) 17 ... Status indicator lamp (status indicator)

Claims (8)

A hoisting mechanism for holding and unloading a predetermined load, and unwinding;
A drive motor for driving the hoisting mechanism;
Control means for controlling the operation of the drive motor;
A hoisting machine having an operation unit for giving an operation command to the hoisting mechanism by an operator to the control means,
A hoisting machine, wherein the operation unit is provided with a status indicator that displays a status of the device based on a result of detecting an operating status of the device.   The status indicator has a status display lamp that can be turned on by changing the flashing cycle, and is configured to flash the status display lamp at a predetermined cycle based on a result of detecting an operation state of the device. The hoist according to claim 1, wherein A voltage detection unit for detecting a power supply voltage supplied to the drive motor;
The winding according to claim 1, wherein the operation unit is provided with a status indicator that displays a status of the apparatus based on a result detected by the voltage detection unit. Upper machine. A current detection unit for detecting a drive current of the drive motor;
The winding according to any one of claims 1 to 3, wherein the operation unit is provided with a status indicator that displays a status of the device based on a result detected by the current detection unit. Upper machine.   The hoisting machine according to claim 3, wherein the state indicator is operated when a result detected by the voltage detection unit becomes smaller than a predetermined value.   The hoisting machine according to claim 3, wherein the state indicator is operated when a result detected by the voltage detection unit becomes larger than a predetermined value.   5. The hoisting machine according to claim 4, wherein the state indicator is operated when a result detected by the current detection unit becomes larger than a predetermined value.   The status indicator has a status notification buzzer capable of sounding by changing the sounding cycle, and sounds the status notification buzzer at a predetermined cycle based on the result of detecting the operation state of the device. The hoisting machine according to any one of claims 1 to 7, wherein the hoisting machine is configured.

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