Conveyor
A technology of conveying devices and sprockets, which is applied in transportation, packaging, escalators, etc., and can solve problems such as failure to detect sudden abnormalities and failure to perform maintenance
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Embodiment 1
[0030] use figure 2 , the hardware structure of Embodiment 1 will be described. In this embodiment, a current sensor 21 is provided to detect the waveform of the output current from the inverter 17 to the drive motor 1 . An arithmetic unit (hereinafter referred to as a microcomputer) 16 based on a microcomputer or the like obtains the output shaft torque of the sprocket 8 from the current value detected by the current sensor 21 . Then, the tension of the drive chain 5 is estimated based on the output shaft torque and the pitch radius gain of the sprocket 8 meshed with the drive chain 5, and the result is sent to the monitoring center 50 or the like.
[0031] That is, the current sensor 21 which detects the drive current of the drive motor 1, and the microcomputer 16 which detects the signal of the current sensor 21 and calculates the tension|tension of the drive chain 5 are added to normal escalator equipment.
[0032] Next, use image 3 Signal processing performed in the ...
Embodiment 2
[0035] use Figure 4 , the hardware structure of Embodiment 2 will be described. In this embodiment, as the inverter 17 for driving the driving motor 1 at a constant speed, a component having a function of monitoring the motor torque based on the output current to the driving motor 1 is used. Then, the microcomputer 16 obtains the output shaft torque of the sprocket 8 from the signal of the torque monitor waveform.
[0036] That is, the inverter 17 can output the torque monitor waveform internally generated for control to the outside. Moreover, the microcomputer 16 detects the signal of the torque monitor waveform of the inverter 17, and calculates the tension|tension of a drive chain.
[0037] Figure 5 Signal processing performed by the microcomputer 16 of the second embodiment will be described. The microcomputer 16 is input with a torque monitoring waveform internally generated by the inverter 17 . The input torque monitor waveform signal is multiplied by an internal ...
Embodiment 3
[0041] exist Figure 6 This example is shown in . Figure 6 The function realization unit executed by the microcomputer 16 is shown, and has a tension calculation unit 60 for the drive chain 5, a pulsation frequency removal filter 61 for the drive chain 5, a pulsation frequency removal filter 62 for the handrail conveyor chain 12, and a step chain 7. The pulsation frequency removal filter 63 and the chain pulsation frequency calculation unit 64. Details of these will be described later.
[0042] Here, the drive system as figure 1 As shown, there is a driving mechanism connected to the downstream side of the driving chain 5 (the driving mechanism of the step 6, the driving mechanism of the handrail conveyor belt). Furthermore, these downstream drive mechanisms have their own sprockets 10 , 11 , 13 and chains 7 , 12 , respectively. In this third embodiment, the tension of the chains 7 and 12 constituting the drive mechanism on the downstream side is detected based on the tensi...
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