JP7099808B2 - Cable reel rotation abnormality detection device - Google Patents

Description

The present invention relates to a cable reel rotation abnormality detecting device.

Conventionally, in factories, mobile trolleys capable of reciprocating a certain section on a rail by rotating wheels by a rotational driving force from a motor have been used for transporting products and the like. A cable for transmitting electric power, control signals, etc. from the ground side is connected to the mobile trolley, and a cable for winding the cable to prevent the cable from being run over by the wheels of the mobile trolley. It is equipped with a reel. The cable extends from a ground-side fixed portion such as a feeding point, and is wound on a cable reel when the mobile trolley travels in a direction approaching the ground-side fixed portion, and the mobile trolley travels in a direction away from the ground-side fixed portion. It is designed to be unwound from the cable reel when it is used.

Patent Document 1 discloses a technique for detecting a rotation abnormality of a cable reel by matching data of a rotation direction, a rotation speed, and a rotation position between the cable reel and wheels, and a rotation for detecting a rotation state of the cable reel. Cable using the detection result of the detector and various status signals such as whether the mobile trolley is running, the traveling direction of the mobile trolley, the open / closed state of the brake, and whether the plucking braking (reverse phase braking) is in progress. It is described that the rotation abnormality of the reel is detected.

Further, in Patent Document 2, pulse signals output from two proximity sensors are used to detect the rotation direction of the cable reel and the presence or absence of rotation, and when the detection result does not match the movement of the moving trolley. , A technique for detecting an abnormality in the rotation of a cable reel by determining that an abnormality has occurred in the rotation of the cable reel is disclosed.

Japanese Unexamined Patent Publication No. 63-47274 Japanese Unexamined Patent Publication No. 2007-68276

However, in the technique disclosed in Patent Document 1, there are many various state signals used for detecting the rotation abnormality of the cable reel, and it is necessary to set a threshold value used for detecting the rotation abnormality of the cable reel. In particular, in an environment where molten steel is handled, such as in a steel mill, it is difficult to set a threshold value used to detect abnormal rotation of the cable reel because the running state of the mobile trolley fluctuates greatly, and if a strict threshold value is set, false detections will increase. Will end up. Further, in order to detect a rotation abnormality of the cable reel, a drive control device that controls the drive of the mobile trolley by transmitting various status signals related to the drive control of the mobile trolley indicating whether the traveling notch of the mobile trolley or plucking braking is in progress. Since it is necessary to incorporate it into the cable reel rotation abnormality detection device, the system becomes complicated both as hardware and software. Further, in order to review the threshold value used for detecting the rotation abnormality of the cable reel, it is necessary to analyze the state including the drive control of the moving carriage, and it takes labor to reduce the false detection rate. In particular, when discharging molten steel or slag to a pot provided on a moving trolley in a converter of a steel mill, it is necessary to move the moving trolley back and forth frequently to adjust the discharge position, and the traveling notch of the moving trolley. Since the switching and the operation and stop of the mobile trolley are frequently performed, it is unavoidable to stop the abnormality determination at this timing.

Further, in the technique disclosed in Patent Document 2, when the mobile trolley passes through the ground-side fixed portion to which one end side of the cable is connected, the bending direction of the cable with respect to the ground-side fixed portion is switched, so that the mobile trolley It detects whether the traveling direction is the front stage side or the rear stage side, but there is a non-detection section in which the cable extends almost upward and the bending direction cannot be detected at the timing when the bending direction is switched. Therefore, it is necessary not to detect the rotation abnormality of the cable reel in the non-detection section. Further, when the operation and the stop of the mobile carriage are repeated in a short time, it is necessary to take measures such as setting a longer non-rotation detection time of the cable reel for detecting the rotation abnormality of the cable reel. Therefore, with the technique disclosed in Patent Document 2, it is not possible to continuously detect rotation abnormality of the cable reel in the entire traveling range of the mobile carriage.

The present invention has been made in view of the above problems, and an object of the present invention is to detect a cable reel rotation abnormality in the entire traveling range of a moving carriage by a simpler method than before. It is to provide a detection device.

In order to solve the above-mentioned problems and achieve the object, the cable reel rotation abnormality detecting device according to the present invention is a mobile carriage provided with a cable reel for winding a cable extending from a fixed portion on the ground side, and the cable reel. A cable reel that detects rotation abnormalities of the cable reel, which is applied to the mobile carriage that can reciprocate a certain section on a rail orthogonal to the axial direction of the cable reel while winding or unwinding the cable. In the rotation abnormality detecting device , the cable reel rotation detecting means for detecting the rotation number and the rotation angle of the cable reel , the wheel rotation detector for detecting the rotation number and the rotation angle of the wheels of the moving carriage, and the above. It is configured along the rail at a plurality of locations where the distance from the ground-side fixed portion is predetermined, and is composed of a limit switch that is hit by an arm portion installed on the mobile carriage, and the arm of the mobile carriage. The traveling position of the moving trolley is corrected by correcting the traveling position of the moving trolley calculated from the rotation number and the rotation angle of the wheels of the moving trolley according to the actual traveling position of the moving trolley in which the unit hits the limit switch. The moving trolley traveling position detecting means for detecting and the cable with respect to the traveling position of the moving trolley when the moving trolley is traveled in the fixed section on the rail and the cable is normally wound or unwound. A data processing means for setting the rotation angle of the reel as a reference rotation angle, a storage means for storing the reference rotation angle set by the data processing means, and the traveling position at the reference rotation angle, and the storage means. Based on the reference rotation angle and the traveling position stored in the above, the rotation angle of the cable reel, which is a deviation of a predetermined amount or more from the reference rotation angle, is used as a threshold value for detecting the rotation abnormality of the cable reel. The rotation angle of the cable reel detected by the cable reel rotation detecting means with respect to the traveling position of the moving vehicle detected by the rotation abnormality threshold generation means automatically generated and the moving vehicle traveling position detecting means is the threshold value. It is characterized by having a rotation abnormality detecting means for detecting a rotation abnormality of the cable reel when the cable reel deviates from the reference rotation angle by a predetermined amount or more based on the above .

The cable reel rotation abnormality detection device according to the present invention has an effect that the rotation abnormality detection of the cable reel can be performed in the entire traveling range of the mobile carriage by a simpler method than the conventional method.

FIG. 1A is a schematic configuration diagram of a mobile carriage provided with a cable reel to which the cable reel rotation abnormality detecting device according to the embodiment is applied. FIG. 1B is a diagram showing the positional relationship between the striker, which is an arm portion installed on the mobile carriage, and the limit switch for detecting the traveling position of the mobile carriage. FIG. 2 is a device layout diagram in the mobile trolley. FIG. 3 is a block diagram of the cable reel rotation abnormality detecting device according to the embodiment. FIG. 4 is a diagram showing the relationship between the traveling position of the moving carriage and the cable reel rotation angle, and the concept of the threshold value used for determining the cable reel rotation abnormality.

Hereinafter, an embodiment of the cable reel rotation abnormality detecting device according to the present invention will be described. The present invention is not limited to the present embodiment.

FIG. 1A is a schematic configuration diagram of a mobile trolley 1 provided with a cable reel to which the cable reel rotation abnormality detecting device according to the embodiment is applied. FIG. 1B is a diagram showing the positional relationship between the striker 40, which is an arm portion installed on the mobile carriage 1, and the limit switch 11 for detecting the traveling position of the mobile carriage 1. FIG. 2 is a device layout diagram in the mobile carriage 1. The mobile trolley 1 according to the present embodiment is, for example, a molten steel trolley used in a steel mill that puts molten steel in a pot and transports it to the next process, or a processing plant that puts slag generated in the steelmaking process into a pot and transports it to the next process. As shown in FIG. 1A, the pan 30 is provided, but the trolley is not limited to that used in steelworks such as molten steel trolleys and tumbling trolleys.

The mobile trolley 1 is capable of reciprocating on a fixed section on the rail 2 by rotating the wheels 6 by the rotational driving force from the motor 7, and winds up the cable 3 that transmits electric power and control signals to the mobile trolley 1. The cable reel 4 is provided. One end of the cable 3 is connected to a feeding point 5 which is a fixed portion on the ground side, and the other end side is connected to a fixed portion on the moving carriage side (not shown). It is pulled with a constant tension by the cable reel 4 to which a rotational force is applied in the clockwise direction. Then, when the moving carriage 1 travels on the rail 2 in a direction approaching the feeding point 5, the cable reel 4 is rotated in the clockwise direction in FIG. 1 (a) by the rotational force, and the cable 3 is wound around the cable reel 4. Taken. On the other hand, when the mobile carriage 1 travels on the rail 2 in a direction away from the feeding point 5, the cable reel 4 rotates in the counterclockwise direction in FIG. 1A against the rotational force, and the cable 3 is a cable. It is unwound from reel 4.

Further, in the moving carriage 1, the motor 7, which is a drive source for rotationally driving the wheel 6, is connected to the output shaft 7a of the motor 7 and the drive shaft 6a of the wheel 6, and the rotational driving force of the motor 7 is applied to the wheel 6. A drive transmission mechanism 8 for transmitting to, a wheel rotation detector 9 for detecting the rotation speed and rotation angle of the wheel 6, and a cable reel rotation detector for detecting the rotation speed and rotation angle of the cable reel 4. 10 and the like are provided.

The drive transmission mechanism 8 has a drive transmission gear train (not shown) composed of a plurality of drive transmission gears, and the rotational drive force input from the output shaft 7a of the motor 7 is previously transmitted by the drive transmission gear train. It is decelerated at the set reduction ratio and transmitted to the drive shaft 6a of the wheel 6. The wheel rotation detector 9 detects the rotation speed and rotation angle of the motor 7 by an encoder or the like coaxially connected to the output shaft 7a of the motor 7, and the detected rotation speed and rotation angle of the motor 7 and drive transmission. The rotation speed and rotation angle of the wheel 6 are detected based on the reduction ratio of the mechanism 8. The wheel rotation detector 9 may be provided with an encoder or the like on the drive shaft 6a of the wheel 6 to detect the rotation speed and the rotation angle of the wheel 6. The cable reel rotation detector 10 detects the rotation speed and rotation angle of the cable reel 4 by an encoder or the like coaxially connected to the rotation shaft 4a of the cable reel 4.

Here, as the cable reel 4, a spring type or a torque motor type can be adopted, but the cable 3 cannot be properly wound due to a breakage of the spring or a failure of the torque motor, and the cable 3 is loosened. It may end up. Further, the cable reel 4 may not rotate properly due to various reasons such as damage to the cable reel 4, disconnection of the cable 3 from the frame of the cable reel 4, and winding of the cable 3 around the rotating shaft 4a. Therefore, if the mobile trolley 1 is continuously driven without noticing that the rotation abnormality of the cable reel 4 has occurred, the cable 3 may be run over by the wheels 6 of the mobile trolley 1 or pulled beyond the allowable tension, resulting in disconnection. There is.

In particular, the mobile trolley 1 used in a steel mill is equipped with a large motor that can obtain a large rotational driving force for transporting a heavy object as a motor 7 for driving the wheels 6. The cable 3 is thickened so as to withstand a large amount of electric power to be supplied. Therefore, when the cable 3 is broken and needs to be replaced, the cable 3 is thick, so that the workability is poor and it takes a long time to recover, which has a great influence on the operation. Further, since the cable 3 is thick and the cost of the cable 3 itself is high, if the cable is frequently replaced, the operation cost will be increased. Therefore, in the present embodiment, the cable reel rotation abnormality detection device 100 is used to detect the rotation abnormality of the cable reel 4, thereby suppressing the occurrence of disconnection of the cable 3 as described above.

FIG. 3 is a block diagram of the cable reel rotation abnormality detecting device 100 according to the embodiment. The cable reel rotation abnormality detection device 100 according to the present embodiment includes a wheel rotation detector 9, a cable reel rotation detector 10, a limit switch 11, a data collection mode switch 12, and a data processing device 20. The data processing device 20 has a calculation unit 21, a storage unit, and the like, and receives various signals from the wheel rotation detector 9, the cable reel rotation detector 10, the limit switch 11, and the data acquisition mode switch 12. Then, arithmetic processing related to cable reel rotation abnormality detection is performed. Then, the traveling position of the moving carriage 1 and the rotation angle of the cable reel 4 are used to function as a rotation abnormality detecting means for detecting the rotation abnormality of the cable reel 4.

Specifically, the data processing device 20 determines the traveling position of the moving carriage 1 on the rail 2 based on the diameter of the wheel 6 from the rotation speed and the rotation angle of the wheel 6 obtained from the signal of the wheel rotation detector 9. calculate. As for this traveling position, when the feeding point 5 is the origin (= 0 [m]), the forward side in FIG. 1A is a positive direction position (for example, +10 [m]), and the backward side is a negative direction. Is shown as the position of (eg, -10 [m]).

It should be noted that an error occurs in the traveling position of the moving carriage 1 on the rail 2 calculated based on the detection result by the wheel rotation detector 9 due to the slip of the wheel 6 on the rail 2. Therefore, in the present embodiment, a plurality of locations (FIGS. 1A and 1B) that can be turned ON / OFF by the striker 40, which is an arm portion whose distance from the feeding point 5 is predetermined and are installed on the mobile carriage 1. ), Only one of the plurality of locations is shown), and limit switches 11 for detecting the traveling position of the mobile carriage 1 are installed respectively. Then, the data processing device 20 corrects the traveling position of the moving carriage 1 on the rail 2 by using the signal from the limit switch 11 turned on / off by the traveling of the mobile carriage 1.

For example, when the limit switch 11 arranged at the position of +30 [m] on the forward side (plus direction) from the feeding point 5 is hit by the striker 40 of the moving carriage 1, the moving carriage 1 at the timing when the limit switch 11 is turned on. The data processing device 20 is made to recognize that the traveling position of the above is a position of +30 [m] on the forward side (plus direction) from the feeding point 5. Then, when the traveling position of the moving carriage 1 based on the detection result of the wheel rotation detector 9 at the timing when the limit switch 11 is turned on is +31 [m] due to the influence of the slip of the wheel 6 or the like, the rail The traveling position of the moving trolley 1 on 2 is corrected to +30 [m]. As a result, errors in the traveling position of the moving carriage 1 due to slipping of the wheels 6 on the rail 2 are accumulated, and the traveling position of the moving carriage 1 obtained by the data processing device 20 is greatly deviated from the actual position. It can be suppressed from being stored.

In the cable reel rotation abnormality detecting device 100 according to the present embodiment, the wheel rotation detector 9 and the limit switch 11 constitute a moving vehicle traveling position detecting means for detecting the traveling position of the moving vehicle 1.

Further, in the present embodiment, the rotation angle of the cable reel 4 at the feeding point 5 is set to 0 [°]. Then, when the cable 3 is unwound from the cable reel 4, the cable reel 4 rotates in the counterclockwise direction in FIG. 1A, so that the rotation angle of the cable reel 4 at that time is counted to the plus side. On the other hand, when the cable 3 is wound around the cable reel 4, the cable reel 4 rotates clockwise in FIG. 1A, so that the rotation angle of the cable reel 4 at that time is counted to the minus side.

For example, when the moving carriage 1 travels on the rail 2 from the feeding point 5 to the forward side (plus direction) and reaches the position of + X [m] while feeding out the cable 3 from the cable reel 4, the cable reel 4 moves. FIG. 1A When the cable reel 4 is rotated exactly two times in the counterclockwise direction, the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1 is 0 [°] + 360 [°] × 2 = 720 [°]. On the other hand, when the moving carriage 1 travels on the rail 2 from the + X [m] position to the backward side (minus direction) and reaches the + X / 2 [m] position while winding the cable 3 around the cable reel 4. In addition, when the cable reel 4 makes exactly one rotation in the clockwise direction in FIG. 1 (a), the rotation angle of the cable reel 4 with respect to the traveling position + X / 2 [m] of the moving carriage 1 is 720 [°]-360 [. °] × 1 = 360 [°].

Further, when the moving carriage 1 travels on the rail 2 from the feeding point 5 to the backward side (minus direction) and reaches the position of −X [m] while feeding out the cable 3 from the cable reel 4, the cable reel 4 1 (a) When the cable reel 4 is rotated exactly two times in the counterclockwise direction, the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1 is 0 [°] + 360 [°] × 2 = 720 [°]. .. On the other hand, the moving carriage 1 travels on the rail 2 from the position of -X [m] to the forward side (plus direction), and reaches the position of -X / 2 [m] while winding the cable 3 around the cable reel 4. When the cable reel 4 makes exactly one rotation in the clockwise direction in FIG. 1 (a), the rotation angle of the cable reel 4 with respect to the traveling position −X / 2 [m] of the moving carriage 1 is 720 [°]. -360 [°] x 1 = 360 [°].

The rotation angle of the cable reel 4 at the feeding point 5 is determined from the rotation number and rotation angle of the cable reel 4 detected by the cable reel rotation detector 10 (3600 so that the rotation angle of the cable reel 4 does not become negative). ([°], etc.), the moving carriage 1 runs on the rail 2 from the feeding point 5 to the forward side (plus direction), and the cable reel 4 turns in the counterclockwise direction in FIG. 1 (a) to feed the cable 3. The cable reel rotation detector 10 may count the number of rotations and the rotation angle. At this time, the cable reel rotation detector 10 counts the rotation speed and the rotation angle of the cable reel 4 to the plus side when the cable reel 4 rotates in the clockwise direction in FIG. 1 (a). On the other hand, the cable reel rotation detector 10 counts the rotation speed and the rotation angle of the cable reel 4 to the minus side when the cable reel 4 rotates in the counterclockwise direction in FIG. 1 (a).

For example, when the moving carriage 1 travels on the rail 2 from the feeding point 5 to the forward side (plus direction) and the cable reel 4 makes exactly two rotations in the counterclockwise direction of FIG. 1 (a), the moving carriage 1 The rotation angle of the cable reel 4 with respect to the traveling position of is 3600 [°]-360 [°] × 2 = 2880 [°]. Further, when the moving carriage 1 travels on the rail 2 from the feeding point 5 to the backward side (minus direction), the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1 can be obtained in the same manner.

FIG. 4 is a diagram showing the relationship between the traveling position of the moving carriage 1 and the cable reel rotation angle, and the concept of the threshold value used for determining the cable reel rotation abnormality. Since the length of the cable 3 included in the mobile trolley 1 is predetermined, if the winding and unwinding of the cable 3 are normal and the traveling position of the mobile trolley 1 is not deviated, the traveling position of the mobile trolley 1 is not displaced. The relationship between the cable reel 4 and the rotation angle of the cable reel 4 is uniquely determined. Therefore, the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1 in the case of normal winding and unwinding is set in advance as a reference rotation angle, and the deviation from the reference rotation angle is monitored. When the deviation is equal to or greater than a predetermined amount, it is considered that some abnormality has occurred in at least one of the cable 3 and the cable reel 4, and an alarm is issued or the mobile carriage 1 is urgently stopped.

For example, when the cable 3 is disconnected from the cable reel 4 and the cable 3 is wound around the axis of the cable reel 4, the winding radius of the cable 3 becomes extremely small, and the moving carriage 1 travels by the same distance as in the normal state. Even so, the number of rotations and the rotation angle of the cable reel 4 are higher than in the normal state. Therefore, at that time, the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1 greatly deviates from the reference rotation angle, and the rotation abnormality of the cable reel 4 is detected. Further, when the cable reel 4 is rotating in the winding direction (clockwise direction in FIG. 1A) and the cable 3 is caught by a falling object or the like and becomes stuck, the moving carriage is moved on the rail 2. As 1 continues to run, the cable 3 that has stopped moving exerts a larger tension than usual on the cable reel 4, and the cable reel 4 operates in the feeding direction (counterclockwise direction in FIG. 1A). .. Therefore, at that time, the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1 greatly deviates from the reference rotation angle, and the rotation abnormality of the cable reel 4 is detected.

As described above, the relationship between the traveling position of the mobile trolley 1 and the rotation angle of the cable reel 4 is broken due to the abnormality generated in the mobile trolley 1, so that the cable reel rotation abnormality detecting device 100 according to the present embodiment is the cable reel 4 By setting the thresholds (upper limit threshold and lower limit threshold) of deviation from the reference rotation angle of the above, it is possible to detect the rotation abnormality of the cable reel 4. Of course, since a slight error occurs in the winding method of the cable 3 with respect to the cable reel 4, it is necessary to allow a slight deviation from the reference rotation angle. The cable reel rotation abnormality detecting device 100 stores the rotation angle of the cable reel 4 and the traveling position of the moving carriage 1 with respect to the rotation angle in the storage unit 22, and the rotation angle stored in the storage unit 22 and the said. Based on the traveling position, the threshold value for detecting the rotation abnormality of the cable reel 4 is generated.

Further, since the rotation direction of the cable reel 4 is reversed when the mobile carriage 1 passes through the feeding point 5, a method of detecting a rotation abnormality of the cable reel 4 based on the rotation direction of the cable reel 4 and the number of counts. Then, it is difficult to determine the rotation abnormality of the cable reel 4, and it is necessary to stop the rotation abnormality detection of the cable reel 4. On the other hand, since the cable reel rotation abnormality detecting device 100 according to the present embodiment only sees the deviation of the rotation angle from the reference rotation angle with respect to the traveling position of the moving carriage 1 detected by the cable reel rotation detector 10, the feeding point. Even when the mobile carriage 1 passes through 5, the rotation abnormality detection of the cable reel 4 can be continuously performed.

In the cable reel rotation abnormality detection device 100 according to the present embodiment, it is assumed that the length of the cable 3 is constant and the mobile carriage 1 is operating normally, and the reference rotation angle of the cable reel 4 is set. Need to be set. Therefore, the cable may be replaced, the fixed position of the cable 3 may be shifted so that the cable 3 is damaged and tension is not applied to the damaged portion, or the fixed portion of the moving carriage 1 or the feeding point 5 may be pulled in within the range allowed by the extra length. When the effective length of the cable 3 changes, it is necessary to change the reference rotation angle of the cable reel 4.

Therefore, as shown in FIG. 3, when the data processing device 20 travels in the entire traveling range on the rail 2 with the data collection mode switch 12 attached to the data processing device 20 turned on. The detection result of the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1 in the above is reset as the reference rotation angle. As a result, it is possible to accurately detect the rotation abnormality of the cable reel 4 even after the state change such as the cable replacement occurs without reviewing the complicated standard for determining the rotation abnormality of the cable reel 4.

The detection result of the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1 varies slightly depending on the state of the moving carriage 1 and the rail 2. Therefore, when the reference rotation angle is reset using the detection result as it is, if the threshold value is set so that the fluctuation can be absorbed as the threshold value of the deviation from the reference rotation angle, the rotation abnormality determination of the cable reel 4 becomes unsatisfactory. Is a concern. Therefore, when resetting the reference rotation angle, it is desirable not to use the detection result as it is, but to obtain smoothed data by taking a moving average or the like. For example, in order to make a more rigorous determination of rotation abnormality of the cable reel 4, a tool that takes the moving average of the detection result (measured value of the rotation angle of the cable reel 4 with respect to the traveling position of the moving carriage 1) and converts it into a standard angle. And reset the reference rotation angle using the standard angle readings converted by that tool. As a result, it is possible to detect the rotation abnormality of the cable reel 4 with higher accuracy.

[Example]
In the converter factory of a steel mill, a steel receiving trolley having the configuration of the mobile trolley 1 shown in FIG. 1 to receive molten steel from the converter and transport it to the next process, and a slag by discharging slag from the converter. By applying the cable reel rotation abnormality detection device 100 according to the present invention to the converter trolley to be transported to the treatment plant, the trouble of cable disconnection is eliminated, and the effect of the present invention can be confirmed.

1 Mobile trolley 2 Rail 3 Cable 4 Cable reel 5 Feed point 6 Wheel 7 Motor 8 Drive transmission mechanism 9 Wheel rotation detector 10 Cable reel rotation detector 11 Limit switch 12 Data acquisition mode switch 20 Data processing device 21 Calculation unit 22 Storage unit 30 Pot 40 Striker 100 Cable reel rotation abnormality detection device

Claims (1)

A mobile carriage equipped with a cable reel that winds up a cable extending from a fixed portion on the ground side, and a fixed section on a rail orthogonal to the axial direction of the cable reel while winding or unwinding the cable on the cable reel. In the cable reel rotation abnormality detecting device for detecting the rotation abnormality of the cable reel, which is applied to the moving carriage capable of reciprocating .
Cable reel rotation detecting means for detecting the rotation speed and rotation angle of the cable reel, and
A wheel rotation detector for detecting the number of rotations and a rotation angle of the wheels of the moving trolley and a plurality of locations where the distance from the ground-side fixed portion is predetermined are installed along the rail on the moving trolley. It is composed of a limit switch that is hit by an installed arm portion, and the rotation speed and rotation of the wheel of the moving carriage depending on the actual traveling position of the moving carriage in which the arm portion of the moving carriage hits the limit switch. A mobile trolley traveling position detecting means for detecting the traveling position of the moving trolley by correcting the traveling position of the moving trolley calculated from an angle , and
The rotation angle of the cable reel with respect to the traveling position of the moving carriage when the moving carriage is run on the rail in the fixed section and the cable is normally wound or unwound is used as a reference rotation angle. Data processing means to set and
A storage means for storing the reference rotation angle set by the data processing means and the traveling position at the reference rotation angle, and a storage means.
In order to detect a rotation abnormality of the cable reel, the rotation angle of the cable reel, which is a deviation of a predetermined amount or more from the reference rotation angle, is determined based on the reference rotation angle and the traveling position stored in the storage means. Rotation abnormality threshold generation means that is automatically generated as the threshold of
The rotation angle of the cable reel detected by the cable reel rotation detecting means with respect to the traveling position of the moving vehicle detected by the moving vehicle traveling position detecting means is a predetermined amount from the reference rotation angle based on the threshold value . When the above deviation occurs, the rotation abnormality detecting means for detecting the rotation abnormality of the cable reel and the rotation abnormality detecting means
A cable reel rotation abnormality detection device characterized by having .

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