Interlocking control circuit of winding machine and winding machine

Abstract

This application provides an interlocking control circuit for a winding machine and the winding machine itself. The interlocking control circuit includes a safety mat, an isolation relay, and a safety relay. The output circuit of the safety mat is connected in series with the isolation relay. Multiple normally open contacts of the isolation relay are connected in series and in parallel with a terminating resistor, and are connected to the signal input terminal of the safety relay. The signal output terminal of the safety relay is connected to the PLC controller of the winding machine. When the output circuit of the safety mat generates a momentary surge current, the surge current passes through the isolation relay. Due to the short duration, it is insufficient to cause the normally open contacts of the isolation relay to close. When the output circuit of the safety mat is short-circuited and remains stable, the multiple normally open contacts of the isolation relay close, and the signal output terminal of the safety relay outputs a contact signal to control the winding machine to stop. This can avoid false alarms caused by electrostatic high voltage.

Description

Technical Field

[0001] This application relates to the field of winding machines, and more particularly to interlocking control circuits for winding machines and winding machines. Background Technology

[0002] During the winding roll switching process of the winding machine, the electrostatic generator needs to be started. The voltage on the output electrode of the electrostatic generator is between 5kV and 8kV. The static electricity generated interferes with the interlocking control circuit of the safety mat. The output circuit of the safety mat is affected by the instantaneous high voltage, generating surge current, which can easily cause false alarms in the interlocking control circuit of the safety mat and cause the machine to stop, affecting the smooth performance of production. Utility Model Content

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] The purpose of this application is to at least partially solve one of the technical problems existing in the related art. The embodiments of this application provide an interlocking control circuit for a winding machine and a winding machine, which can avoid the phenomenon of false alarm of safety relay caused by electrostatic high voltage.

[0005] An embodiment of the first aspect of this application provides an interlocking control circuit for a winding machine, comprising a safety mat, an isolation relay, and a safety relay; the output circuit of the safety mat is connected in series with the isolation relay; multiple normally open contacts of the isolation relay are connected in series and in parallel with a terminating resistor, and connected to the signal input terminal of the safety relay; the signal output terminal of the safety relay is connected to the PLC controller of the winding machine.

[0006] According to certain embodiments of the first aspect of this application, the output circuit of the safety mat is connected to a pressure sensor. When the pressure on the pressure sensor exceeds a preset pressure threshold, the resistance of the output circuit of the safety mat becomes 0, and the output circuit of the safety mat is short-circuited.

[0007] According to certain embodiments of the first aspect of this application, when the safety mat is affected by the voltage of the electrostatic electrode, the output circuit of the safety mat generates a momentary surge current, which passes through the isolation relay, and the plurality of normally open contacts of the isolation relay do not close.

[0008] According to certain embodiments of the first aspect of this application, when the output circuit of the safety mat is short-circuited and remains stable for a preset time threshold, the multiple normally open contacts of the isolation relay close, and the signal output terminal of the safety relay outputs a contact signal; the PLC controller responds to the contact signal and controls the winding machine to stop.

[0009] According to certain embodiments of the first aspect of this application, the reset terminal of the safety relay is connected to a reset switch.

[0010] According to certain embodiments of the first aspect of this application, a plurality of the safety mats are connected in series.

[0011] According to a second aspect of this application, a winding machine is provided with an interlocking control circuit for a winding machine as described in the first aspect of this application; the winding machine includes a winding mechanism, a cutting mechanism, and an electrostatic generator, the electrostatic generator being used to apply static electricity to the winding roller of the winding mechanism.

[0012] According to certain embodiments of the second aspect of this application, a safety mat is laid beneath the winding machine.

[0013] According to certain embodiments of the second aspect of this application, there are two take-up rollers, namely a first take-up roller and a second take-up roller; the take-up mechanism further includes a first turntable and a second turntable, the two ends of the first take-up roller are respectively connected to the first turntable and the second turntable, the two ends of the second take-up roller are respectively connected to the first turntable and the second turntable, the first take-up roller and the second take-up roller are driven by a take-up roller drive motor, the first turntable and the second turntable are driven by a turntable drive motor, and the take-up roller drive motor and the turntable drive motor are connected to a PLC controller.

[0014] According to certain embodiments of the second aspect of this application, the cutting mechanism includes a cutter holder, a hydraulic cylinder, and a cutting blade, wherein the cutting blade is connected to the cutter holder via the hydraulic cylinder; the cutting blade is driven by a cutting blade drive motor, and the cutting blade drive motor is connected to a PLC controller.

[0015] The above solution has at least the following beneficial effects: An isolation relay is connected in series in the output circuit of the safety mat. The two normally open output contacts of the isolation relay are connected in series, then in parallel with a terminating resistor, and finally connected to the signal input terminal of the safety relay. When the safety mat is affected by the voltage of the electrostatic electrode, the output circuit of the safety mat generates a momentary surge current. This surge current passes through the isolation relay, but due to the short duration, it is insufficient to cause the normally open contacts of the isolation relay to close. When the output circuit of the safety mat is short-circuited and remains stable for a preset time threshold, multiple normally open contacts of the isolation relay close, and the signal output terminal of the safety relay outputs a contact signal. The PLC controller responds to the contact signal and controls the winding machine to stop. This completely avoids the false alarm phenomenon of the Mayser safety relay caused by electrostatic high voltage. Attached Figure Description

[0016] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0017] Figure 1 This is a structural diagram of a winding machine;

[0018] Figure 2 This is a front view of the winding machine;

[0019] Figure 3 This is a top view of the winding machine;

[0020] Figure 4 This is a side view of the winding machine;

[0021] Figure 5 This is the circuit diagram of the interlocking control circuit. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, or the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0024] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0025] Embodiments of this application provide a winding machine. A winding machine is a device used in a film production line to complete the final step in the production process.

[0026] Reference Figures 1 to 4 The winding machine includes a winding mechanism, a cutting mechanism, and an electrostatic generator, which is used to apply static electricity to the winding roller of the winding mechanism.

[0027] The winding mechanism includes a winding roller, a first turntable 210, and a second turntable 220. There are two winding rollers: a first winding roller 110 and a second winding roller 120. The two ends of the first winding roller 110 are connected to the first turntable 210 and the second turntable 220, respectively. The two ends of the second winding roller 120 are connected to the first turntable 210 and the second turntable 220, respectively. The first winding roller 110 and the second winding roller 120 are driven by a winding roller drive motor. The first turntable 210 and the second turntable 220 are driven by a turntable drive motor. The winding roller drive motor and the turntable drive motor are connected to a PLC controller.

[0028] There are two take-up roller drive motors, which drive the first take-up roller 110 and the second take-up roller 120 respectively. There are two turntable drive motors, which drive the first turntable 210 and the second turntable 220 respectively.

[0029] The cutting mechanism includes a cutter holder 310, a hydraulic cylinder 330, and a cutting blade 320. The cutting blade 320 is connected to the cutter holder 310 via the hydraulic cylinder 330. The cutting blade 320 is driven by a cutting blade drive motor, which is connected to a PLC controller.

[0030] The film enters the winding machine via the traction roller and is wound onto the winding steel roller. During production, the winding roller stops at a 0° angle to wind the film. Once the desired length is reached, the winding machine flips, rotating the winding roller to a 180° angle and stopping it. When the first winding roller 110 reaches the set length during winding, it automatically switches to the second winding roller 120. The turntable drive motor drives the first turntable 210 and the second turntable 220 to rotate, rotating the first winding roller 110 to the unwinding position and simultaneously rotating the second winding roller 120 to the winding position. Then, the cutter holder 310 descends to its position, and at the same time, the electrostatic generator is activated to add static electricity to the first winding roller 110 and the second winding roller 120 to improve adhesion. Then, the cutter drive motor drives the cutter 320 to cut the film, causing the film to wrap around the second winding roller 120, thus smoothly completing the winding roller switching.

[0031] During the winding roll switching process, the electrostatic generator needs to be activated. The voltage on the output electrode of the electrostatic generator is between 5V and 8V. The static electricity generated will interfere with the control circuit of the safety mat 400 and generate surge current due to the instantaneous high voltage.

[0032] Reference Figure 5 The winding machine is equipped with the following interlocking control circuit to avoid the impact of surge circuit.

[0033] The interlocking control circuit includes a safety mat 400, an isolation relay K, and a safety relay 500; the output circuit of the safety mat 400 is connected in series with the isolation relay K; multiple normally open contacts of the isolation relay K are connected in series and in parallel with the terminating resistor R, and connected to the signal input terminal of the safety relay 500; the signal output terminal of the safety relay 500 is connected to the PLC controller of the winding machine.

[0034] Safety mats 400 are laid under the winding machine. Multiple safety mats 400 are connected in series. Each safety mat 400 is a plastic carpet. A precision electronic circuit forming a pressure sensor is installed in the middle layer. The output circuit of each safety mat 400 is connected to the pressure sensor.

[0035] When the pressure sensor is not under pressure, the output circuit of the safety mat 400 has a high resistance, resulting in an open circuit. When the pressure on the pressure sensor exceeds a preset pressure threshold, the resistance of the output circuit of the safety mat 400 becomes 0 ohms, resulting in a short circuit. For example, if someone steps on the safety mat 400 or an object of a certain weight falls on it, the pressure on the pressure sensor exceeds the preset pressure threshold, the resistance of the output circuit of the safety mat 400 becomes 0 ohms, and the output circuit of the safety mat 400 short-circuits. The input resistance of the safety relay 500 changes from 1.2Ω to 0Ω, and the safety relay 500 outputs a contact signal to the PLC controller. The interlocking control circuit of the turntable drive motor, winding roller drive motor, and cutting blade drive motor of the winding machine is disconnected, controlling the winding machine to stop operating. The winding roller immediately stops, and the hydraulic cylinder 330 of the transverse cutting blade 320 self-locks to ensure personnel safety.

[0036] To address the issue of instantaneous surge currents caused by high voltage from electrostatic electrodes, which could lead to false alarms in the Mayser safety relay 500, the output signal of the safety mat 400 was isolated. An isolation relay K (OMRON MY4N-GS) was connected in series in the output circuit of the safety mat 400. The two normally open output contacts of the isolation relay K were connected in series, then in parallel with a 1.2Ω / 2W terminating resistor R, and finally connected to the signal input terminals (Y1-Y2) of the safety relay 500. When the safety mat 400 is affected by the voltage of the electrostatic electrode, an instantaneous surge current is generated in its output circuit. This surge current passes through the isolation relay K, preventing its multiple normally open contacts from closing. Specifically, when the surge current generated by the high voltage of the electrostatic electrode flows through the OMRON relay, the duration is too short to cause the normally open contacts of the isolation relay K to close.

[0037] When the output circuit of the safety mat 400 is short-circuited and remains stable for a preset time threshold, multiple normally open contacts of the isolation relay K close, and the signal output terminal of the safety relay 500 outputs a contact signal; the PLC controller responds to the contact signal and controls the winding machine to stop.

[0038] This completely avoids the Mayser safety relay 500 false alarm caused by electrostatic high voltage.

[0039] The reset terminals (S1-S3) of the safety relay 500 are connected to a reset switch Sw. After troubleshooting, press the reset button Sw to restore the system and allow the interlocking control circuit to enter normal monitoring mode.

[0040] The above is a detailed description of the preferred embodiments of this application, but this application is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An interlocking control circuit for a winding machine, characterized in that, The system includes a safety mat, an isolation relay, and a safety relay; the output circuit of the safety mat is connected in series with the isolation relay; multiple normally open contacts of the isolation relay are connected in series and in parallel with a terminating resistor, and are connected to the signal input terminal of the safety relay; the signal output terminal of the safety relay is connected to the PLC controller of the winding machine.

2. The interlocking control circuit for the winding machine according to claim 1, characterized in that, The output circuit of the safety mat is connected to a pressure sensor. When the pressure on the pressure sensor exceeds a preset pressure threshold, the resistance of the output circuit of the safety mat becomes 0, and the output circuit of the safety mat is short-circuited.

3. The interlocking control circuit for the winding machine according to claim 1, characterized in that, When the safety mat is affected by the voltage of the electrostatic electrode, the output circuit of the safety mat generates a momentary surge current. The momentary surge current passes through the isolation relay, and the multiple normally open contacts of the isolation relay do not close.

4. The interlocking control circuit for the winding machine according to claim 1, characterized in that, When the output circuit of the safety mat is short-circuited and remains stable for a preset time threshold, the multiple normally open contacts of the isolation relay close, and the signal output terminal of the safety relay outputs a contact signal; the PLC controller responds to the contact signal and controls the winding machine to stop.

5. The interlocking control circuit for the winding machine according to claim 1, characterized in that, The reset terminal of the safety relay is connected to a reset switch.

6. The interlocking control circuit for the winding machine according to claim 1, characterized in that, Multiple safety mats are connected in series.

7. A winding machine, characterized in that, The winding machine is provided with an interlocking control circuit for the winding machine as described in any one of claims 1 to 6; the winding machine includes a winding mechanism, a cutting mechanism, and an electrostatic generator, wherein the electrostatic generator is used to apply static electricity to the winding roller of the winding mechanism.

8. The winding machine according to claim 7, characterized in that, A safety mat is laid under the winding machine.

9. The winding machine according to claim 7, characterized in that, The winding mechanism includes two winding rollers, namely a first winding roller and a second winding roller; the winding mechanism also includes a first turntable and a second turntable, the two ends of the first winding roller are respectively connected to the first turntable and the second turntable, the two ends of the second winding roller are respectively connected to the first turntable and the second turntable, the first winding roller and the second winding roller are driven by a winding roller drive motor, the first turntable and the second turntable are driven by a turntable drive motor, and the winding roller drive motor and the turntable drive motor are connected to a PLC controller.

10. The winding machine according to claim 7, characterized in that, The cutting mechanism includes a cutter holder, a hydraulic cylinder, and a cutting blade. The cutting blade is connected to the cutter holder via the hydraulic cylinder. The cutting blade is driven by a cutting blade drive motor, which is connected to a PLC controller.

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