JPH07115076B2 - Coil car protector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil car protection device for carrying and carrying coil material or the like.

[0002]

2. Description of the Related Art A typical prior art is JP-A 61-269.
933. In this prior art, at the place where the coil of the coil car is mounted, a roll for detecting the movement amount of the coil in the width direction, that is, the axial direction of the coil, and a pulse for outputting a pulse number proportional to the rotation number of the roll An oscillator is provided to stop the coil car when the coil collides with the payoff reel drum and the coil moves.

Another prior art is disclosed in JP-A-3-169429. In this prior art, between the support base of the coil car and the coil support above it, a pair of load detectors are interposed at intervals in the width direction of the coil, and when the coil collides with the drum, When the amount of change in load detected by each load detector exceeds a predetermined threshold value, the coil car is stopped.

Still another prior art is Japanese Patent Laid-Open No. 4-3711.
9 is disclosed. In this prior art, the degree of deviation of the coil mounted on the coil car in the width direction is controlled by the projector provided on one side of the coil width direction and the light from the projector is partially blocked by the coil. And an image sensor for receiving light, and when the coil is displaced on the coil car based on the output of the image sensor, the coil car is stopped.

[0005]

In each of the above prior arts, the coil mounted on the coil car collides with a pay-off reel drum and the coil moves on the coil car only when the coil moves. It is detected, and the traveling of the coil car is stopped accordingly. Therefore, there is a problem of poor responsiveness. The coil is as heavy as 25 tons of steel strip, and is loaded on a coil car and traveled at, for example, 10 m / min. Therefore, when such a heavy coil collides with a payoff reel drum, a large impact occurs, May fall over and fall from the coil car. If this happens, the coil that is dropped may be damaged, and the coil coil may collide with the coil car body and nearby equipment (device), causing damage or damage. There is a fear.

It is an object of the present invention to provide a coil car protection device capable of detecting with a better response when a mounted object such as a coil collides.

[0007]

According to the present invention, a vertically movable support member 9, 1 provided on a carriage 2 traveling on a rail 5 is provided.
A drive source 6 for driving a trolley 2 on which a coil is mounted on
In a coil car protection device having a support member 9,
11, a vibration sensor 15 fixed to 11, a time measuring means for measuring a predetermined time W2 immediately after the coil car starts traveling, after the vibration waveform 26 disappears at the beginning of the traveling, and outputs of the vibration sensor 15 and the time measuring means. In response to the output of the vibration sensor 15 and the output of the level discrimination means for discriminating the output of the vibration sensor 15 at a predetermined discrimination level L1 after the lapse of the time W2. And a means for stopping the drive source 6 when it becomes a protective device for a coil car.

[0008]

According to the present invention, when the coil car is traveling with the object to be mounted such as the coil mounted on the coil car, the coil, which is the object to be mounted, collides with the pay-off reel drum and impacts the coil car. When a force is applied, the vibration of the coil car is detected by the vibration sensor, and when the amplitude of the vibration becomes larger than a predetermined value, the traveling of the coil car is stopped. As a result, it is possible to detect a collision of the mounted object such as a coil on the coil car before it is displaced, so that the coil car can be stopped immediately and the responsiveness can be improved. Therefore, it is possible to prevent the mounted object from displacing on the coil car, and it is possible to prevent the mounted object such as a coil from falling or falling from the coil car. According to the present invention in particular, immediately after the bogie 2 of the coil car starts traveling by the drive source 6,
A predetermined time W2 after exceeding the time W1 until the vibration waveform 26 disappears in the initial stage of running is measured by the time measuring means, and after the predetermined time W2 has elapsed, the output of the vibration sensor 15 is discriminated to make a collision. Since the drive source 6 is stopped when a large vibration occurs due to, it is possible to prevent erroneous detection immediately after the start of traveling. Further, in the present invention, the vibration sensor is fixed to the supporting members 9 and 11 provided so as to be able to travel on the carriage 2, and therefore, the vibration due to the collision and contact of the coils mounted on the supporting members 9 and 11 is highly sensitive. Can be detected by means of this, and the drive source 6 can be stopped immediately.

[0009]

1 is a partial sectional view of a coil car 1 according to an embodiment of the present invention. The bogie 2 of the coil car 1 has wheels 3, and the wheels 3 travel on rails 5 provided on a floor 4. The wheels 3 are driven and driven by the power transmitted from the motor 6 provided on the carriage 2 via the chain 7 and the pair of sprocket wheels 31 and 32. For example 220
The coil 8 of a steel strip having a diameter of 0 mmφ and about 25 tons is mounted by a conveyor or a crane on a coil pedestal 9 having a V-shape when viewed from the traveling direction perpendicular to the paper surface of FIG. The coil pedestal 9 is attached to a piston rod 11 of a hydraulic cylinder 10 provided on the truck 2. Cylinder 1
The piston rod 11, and thus the coil receiving base 9, is moved up and down by 0, and the hole 12 of the coil 8 is inserted into the payoff reel drum 13 provided at the measurement position shown in FIG.
Can be inserted by running in the direction of.

The vibration sensor 15 shown in FIG. 1 is fixed to the side of the piston rod 11 of the cylinder 10. The vibration sensor 15 includes, for example, a strain gauge, and the mounting screw portion 16 is screwed and fixed to a screw hole 17 formed in the side wall of the piston rod 11. The coil support 9 and the piston rod 11 form a support member.

FIG. 4 is an electric circuit diagram showing a configuration related to the motor 6 for driving the carriage 2 of the coil car 1 to travel.
The power from the AC power supply 18 is supplied from the switch 19 to the line 2
It is supplied to the motor 6 via 0. The electric power from this line 20 is converted into direct current in the rectifier 21, and the electric power from the motor 6
Is applied to the electromagnetic brake 22 provided in connection with the. The electromagnetic brake 22 is in a state in which the braking force is released when the DC power is supplied, and thus the wheels 3 can be driven by the power of the motor 6, and the DC power is supplied to the electromagnetic brake 22. When it is demagnetized due to no longer being performed, the braking force is exerted, and the rotation of the output shaft 23 of the motor 6 (see FIG. 1 described above) and hence the wheel 3 is stopped.

FIG. 5 is a block diagram showing the electrical construction of the embodiment shown in FIGS. An electric signal having a level corresponding to the amplitude of the vibration of the coil car 1 from the vibration sensor 15 is input to the processing circuit 24 realized by a microcomputer or the like. This processing circuit 24
The switch 19 is controlled. In order to control the traveling of the coil car 1 and allow the coil 8 to be automatically mounted on the payoff reel 13, the movement command signal generation circuit 25
A movement command signal is generated, which causes the processing circuit 24.
Causes the switch 19 to conduct.

FIG. 6 is a flow chart for explaining the operation of the processing circuit 24. From step n1 to step n2, the movement command signal generation circuit 25 outputs the movement command signal for the coil car 1, and accordingly the coil car 1
The coil 8 is mounted on the coil receiving base 9 of the
Is instructed to be automatically inserted into the payoff reel 13, the switch 19 is turned on in step n3, which causes the coil car 1 to move to the arrow 14 in FIG.
To start moving in the direction of. FIG. 7 (1) shows a coil car 1.
Shows the running speed of. At time t1, the switch 19 is turned on to supply electric power to the motor 6,
The braking force of the electromagnetic brake 22 is released, the coil car 1 starts traveling from the stopped state, and travels while increasing the speed until time t2. After time t2, the coil car 1 travels at a constant speed.

FIG. 7B shows the output waveform of the vibration sensor 15. When the coil car 1 starts traveling at time t1, a slight vibration waveform is generated as indicated by reference numeral 26 immediately after time t1. The vibration waveform 26 in the initial stage of traveling almost disappears within the time W1 from the time t1. The time W1 is, for example, 1 to 2 seconds.

In step n4 of FIG. 6, it is determined whether or not a predetermined time W2 has elapsed from the time t1 when the coil car 1 started traveling. This time W2 is larger than the above-mentioned time W1 (W2> W1), and this time W2
May be, for example, 3 seconds. At this time W2, the level discrimination of the output of the vibration sensor 15 is not performed, so that it is erroneously detected that the coil 8 has collided with the payoff reel drum 13 at the time W1 at the beginning of traveling of the coil car 1 described above. prevent.

At step n5, the processing circuit 24 discriminates the level of the output of the vibration sensor 15. This level discrimination is judged on the basis of the discrimination level indicated by reference numeral L1 in FIG. 7 (2), and when the vibration amplitude of the coil car 1 detected by the vibration sensor 15 is less than the discrimination level L1 described above. , Step n6, coil 8
The drum 13 is inserted into the hole 12 of the coil 8 without colliding with the payoff reel drum 13,
Completes the operation of inserting the drum into the drum 13,
Then, a series of operations is completed.

At step n5, when the amplitude of the vibration detected by the vibration sensor 15 at time t3 in FIG. 7 (1) exceeds the discrimination level L1 and the waveform 27 is obtained, the processing circuit 24 switches the switch 19 on. Cut off. As a result, in step n8, the supply of electric power to the motor 6 is cut off, the electric power is not supplied to the electromagnetic brake 22, and the output shaft 23 of the motor 6 and hence the wheels 5 are rotated by the braking force of the electromagnetic brake 22. Immediately stopped. Thus, in step n9, the coil car 1 is stopped. In this way, the coil 8 becomes the coil car 1.
When the vehicle collides with the pay-off reel drum 13 during constant speed traveling, the coil 8 of the collision hits the coil receiving base 9 of the coil car 1.
The coil car 1 is stopped before being displaced in the width direction of the coil 8 (the direction perpendicular to the paper surface of FIG. 1, the left-right direction of FIG. 2). Therefore, the coil 8 does not undesirably displace on the coil pedestal 9, and the coil 8 is prevented from dropping from the coil car 1, which causes the coil 8 to drop onto the coil car 1 and nearby equipment (device). The problem that the coil collides and the damage becomes large disappears.

The pay-off reel drum 13 can be expanded / contracted in the radial direction, the coil 8 is mounted in a state where the drum 13 is contracted, and the drum 13 is inserted in the hole 12 when the drum 8 is inserted. Expands radially outward, and the coil 8 is fixed to the drum 13.

In the above-mentioned embodiment, the coil 8 is mounted on the coil car 1, and the coil 8 is mounted on the pay-off reel drum 1.
Although the operation when colliding with 3 is described, as another application of the present invention, as shown in FIG. 8, a straight cylindrical sleeve 28 having elasticity such as rubber is mounted on the coil car 1, and The present invention can be implemented even when the pay-off reel drum 13 is inserted and mounted in the hole 29 of the sleeve 28. When the inner diameter of the hole 12 of the coil 8 is large, the sleeve 28 is provided with the pay-off reel drum 13
The sleeve 28 is attached to the sleeve 28 in advance, and in this state, the coil car 1 is used so that the coil 8 can be attached to the sleeve 28. Further, in the present invention, when forming a coil by winding a steel strip on a take-up reel drum, when the steel strip is thick, a sleeve is pre-installed on the take-up reel drum in order to prevent bending at the time of winding the coil. It is necessary to increase the winding diameter of the coil, and the coil car according to the present invention can also be used for mounting such a sleeve on the winding reel drum.
When the sleeve collides with the take-up reel drum, the sleeve can be prevented from being displaced or dropped on the coil car.

Furthermore, the present invention relates to a coil car, and when the coil, the sleeve, and other mounted objects collide, the mounted objects are prevented from being displaced or dropped on the coil car to protect them. It can be implemented over a wide range.

[0021]

[0022]

As described above, according to the present invention, the coil car is provided with the vibration sensor, and when the vibration detected by the vibration sensor exceeds a predetermined value, the traveling of the coil car is stopped. The coil car can be stopped before the mounted object such as the coil is actually displaced, and the responsiveness is improved.
Therefore, it is possible to prevent the mounted object from displacing on the coil car, and to prevent an accident that the mounted object falls from the coil car. In particular, according to the present invention, the time measuring means measures the predetermined time W2 after the vibration waveform 26 disappears at the beginning of the running of the coil car immediately after the coil car starts running, and after the predetermined time W2 has passed, the vibration sensor 15 Since the output of the above is discriminated by the level discriminating means, it is possible to prevent erroneous detection immediately after the coil car starts traveling.
Further, according to the present invention, the coil car 5 includes the supporting members 9 and 11 for mounting the coil on the carriage 2 traveling on the rail 5.
Is provided so as to be able to move up and down, and the vibration sensor 15 is fixed to the support members 9 and 11, so that when the coil mounted therein collides with or contacts an obstacle,
Immediately, the vibration can be detected with high sensitivity by the vibration sensor 15. Therefore, without causing a response delay, the drive source 6 can be used at the time of contact or collision of such a coil.
Will be able to stop immediately. As a result, a large accident such as a fall of the coil from the supporting members 9 and 11 can be reliably prevented, and the coil can be prevented from being displaced on the supporting members 9 and 11.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view seen from the front of an embodiment of the present invention.

2 is a simplified side view of the embodiment shown in FIG. 1 as seen from the side.

FIG. 3 is a cross-sectional view showing a state where a vibration sensor 15 is attached to a piston rod 11.

FIG. 4 is an electric circuit diagram showing a configuration related to a motor 6 and an electromagnetic brake 22.

5 is a block diagram showing an electrical configuration related to a vibration sensor 15 and a switch 19. FIG.

6 is a flowchart for explaining the operation of the processing circuit 24 shown in FIG.

FIG. 7 is a waveform chart for explaining the operation shown in FIGS. 1 to 6.

FIG. 8 is a simplified side view illustrating an operation of mounting the sleeve 28 on the payoff reel 13 using the coil car 1.

[Explanation of symbols]

 1 Coil Car 2 Bogie 3 Wheel 5 Rail 6 Motor 8 Coil 9 Coil Cradle 10 Hydraulic Cylinder 11 Piston Rod 15 Vibration Sensor 19 Switch 22 Electromagnetic Brake 24 Processing Circuit

Claims (1)

[Claims] 1. A coil car protection device having a drive source 6 for traveling a trolley 2, wherein a coil is mounted on support members 9, 11 provided on a trolley 2 traveling on a rail 5 and capable of moving up and down. A vibration sensor 15 fixed to the members 9 and 11, a time measuring means for measuring a predetermined time W2 after the vibration waveform 26 disappears at the beginning of the running of the coil car immediately after the running of the coil car, and the vibration sensor 15 and the time measuring means. In response to each output of the vibration sensor 15 and the output of the vibration sensor 15 in response to the output of the level discrimination means for discriminating the output of the vibration sensor 15 at a predetermined discrimination level L1 after the lapse of the time W2. A coil car protection device, including means for stopping the drive source 6 when the level becomes L1 or higher.