JP5540715B2 - Passenger conveyor control device - Google Patents

Description

  The present invention relates to a passenger conveyor control device.

  A conventional passenger conveyor control device includes a plurality of safety switches for detecting an abnormality, a plurality of first and second safety switch state input means that are opened in accordance with the operation of the safety switch, and starting and stopping the driving device. An operation control output means, a CPU, and an operation monitoring means for controlling the operation operation output means to control the operation and stop of the passenger conveyor, and according to the opening of the first safety switch state input means An emergency stop circuit in which the coils of the first safety switch state input means and the operation control output means are connected in series so as to operate the operation control output means and stop the passenger conveyor, and the second safety switch state input means And a safety switch monitoring circuit that operates the operation control output means via the operation monitoring means in response to the opening to stop the passenger conveyor. In the emergency stop circuit and the safety switch monitoring circuit of the passenger conveyor control device, the safety switch state input means is shared (for example, see Patent Document 1).

  According to the passenger conveyor control device configured as described above, by reducing the number of wires on the power supply side connected to the emergency stop circuit and the safety switch monitoring circuit, that is, the number of wires routed around the entire frame of the passenger conveyor. The circuit configuration around the safety switch can be simplified.

JP-A-11-263573

  However, in the thing of patent document 1, several wiring is needed from each safety device to a control circuit. For this reason, there existed a problem that wiring will increase according to the number of safety devices.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a passenger conveyor control device capable of reducing wiring for detecting which safety device has been operated. It is to be.

  A control device for a passenger conveyor according to the present invention is connected in series to a voltage supply source, and a plurality of detection contacts that are opened according to the operation of each of a plurality of safety devices provided on the passenger conveyor, A plurality of voltage drop circuits provided in proximity to each of the detection contacts and connected in parallel to each of the plurality of detection contacts, and the voltage supply source of the detection contact farthest from the voltage supply source And a monitoring device that detects which safety device has been operated by detecting the voltage at the opposite end.

  According to the present invention, it is possible to reduce the wiring for detecting which safety device is operated.

It is a side view of the passenger conveyor in which the control apparatus of the passenger conveyor in Embodiment 1 of this invention is utilized. It is a figure for demonstrating the structure of the general wiring of the control apparatus of the passenger conveyor in Embodiment 1 of this invention. It is a figure for demonstrating the structure of the wiring peculiar to the control apparatus of the passenger conveyor in Embodiment 1 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a side view of a passenger conveyor in which the passenger conveyor control apparatus according to Embodiment 1 of the present invention is used.
In FIG. 1, 1 is a passenger conveyor. This passenger conveyor 1 is provided straddling the upper and lower floors of a building, for example. The user can move between the upper and lower floors of the building using the man conveyor 1.

  The passenger conveyor 1 is provided with a plurality of safety devices for the purpose of protecting the safety of the user. In FIG. 1, as a safety device, a drive chain safety device (DCS) 2, a speed governor (HGD) 3, a skirt guard safety device (SSS) 4, an inlet safety device (HGS) 5, a step abnormal running detection device (CRS). 6) A handrail slip detection device (HSS) 7 is provided.

  The drive chain safety device 2 has a function of detecting breakage or elongation of a drive chain (not shown). The governing device 3 has a function of detecting when the speed of the passenger conveyor 1 is 120% to 130% of the rated speed or when the speed is reduced. The skirt guard safety device 4 has a function of detecting that an object or the like is caught between a skirt guard (not shown) and a step (not shown).

  The inlet safety device 5 has a function of detecting that a hand is drawn into a handrail entrance (not shown). The step abnormal running detection device 6 has a function of detecting that a step is lifted by an object sandwiched between the step and the skirt guard or between the steps. The handrail slip detection device 7 has a function of detecting that the handrail has become faster or slower with respect to the steps.

  Although not shown in FIG. 1, various safety devices are also provided below the passenger conveyor 1. The detection states of these devices 2 to 7 are monitored by a monitoring device (not shown in FIG. 1). And the monitoring apparatus stops the passenger conveyor 1 even when any of the apparatuses 2 to 7 detects the above contents. Thereby, the safety of the user of the passenger conveyor 1 is achieved.

Next, a general wiring configuration between each safety device and the monitoring device 9 will be described with reference to FIG.
FIG. 2 is a diagram for explaining a general wiring configuration of the passenger conveyor control apparatus according to Embodiment 1 of the present invention.

  In FIG. 2, 8 is a plurality of detection contacts. These detection contacts 8 are normally closed contacts that open when each of the five safety devices (not shown) operates. These detection contacts 8 are connected in series with the voltage supply source. The output side of these detection contacts 8 is connected to the monitoring device 9. The monitoring device 9 detects the output voltage of these detection contacts 8.

  In such a wiring configuration, when a specific detection contact 8 is opened, the detection contact 8 on the monitoring device 9 side with respect to the detection contact 8 is disconnected from the voltage supply source. For this reason, the output voltage of the detection contact 8 after the detection contact 8 is zero. That is, the monitoring device 9 can detect which safety device has been operated based on the output voltage of each detection contact 8.

  Here, the passenger conveyor 1 is designed to save space for the purpose of reducing the installation space. In particular, the wiring for the safety device is arranged throughout the passenger conveyor 1. For this reason, wiring reduction of a safety device is desired. However, in the general wiring described above, it is necessary to route a plurality of wirings to the monitoring device 9 corresponding to each detection contact 8. That is, it is necessary to increase the number of wirings as the number of safety devices increases.

  Therefore, in the present embodiment, the configuration is such that the wiring for detecting which safety device is operated can be reduced. Hereinafter, the configuration of the wiring of the safety device in the present embodiment will be specifically described.

FIG. 3 is a diagram for explaining a wiring configuration unique to the passenger conveyor control device according to the first embodiment of the present invention.
First, the configuration of wiring unique to this embodiment will be described with reference to the upper part of FIG.
As shown in the upper part of FIG. 3, the plurality of detection contacts 8 are connected in series to a voltage supply source in the same manner as a general wiring configuration.

  A plurality of voltage drop circuits 10 are provided in proximity to each of the detection contacts 8. These voltage drop circuits 10 are composed of resistors, for example. These voltage drop circuits 10 are connected in parallel to each of the plurality of detection contacts 8. The voltage at the end of the detection contact 8 farthest from the voltage supply source opposite to the voltage supply source is detected by the monitoring device 9.

  In the present embodiment, a correction wiring 11 is also provided. The correction wiring 11 is arranged along the wiring of the plurality of detection contacts 8. That is, the correction wiring 11 has a length substantially equal to the wiring of the plurality of detection contacts 8. The correction wiring 11 connects the voltage supply source and the monitoring device 9 without passing through the detection contact 8 and the voltage drop circuit 10.

  Here, the above configuration is generalized and a case is considered where the number of safety devices is N, the voltage when not passing through the voltage drop circuit 10 is Vs, and the voltage drop at each voltage drop circuit 10 is ΔV. In this case, when the safety device corresponding to the nth detection contact 8 from the voltage supply source side operates, the nth detection contact 8 from the voltage supply source side opens.

  By such opening, a voltage drop occurs in each of the nth and subsequent voltage drop circuits 10 from the voltage supply source side. Therefore, considering the voltage drop of the wiring itself, the detection voltage V in the monitoring device 9 is lower than the voltage Vs when not passing through the voltage drop circuit 10 by this voltage drop. The detection voltage V in the monitoring device 9 in this case is expressed by the following equation (1).

V = Vs− {N− (n−1)} · ΔV (1)
In addition, when any safety device is not operating, any detection contact 8 is closed. In this case, no voltage drop occurs in any of the voltage drop circuits 10. For this reason, the detection voltage V at the monitoring device 9 is substantially the same as the voltage Vs near the monitoring device 9 side of the correction wiring 11.

Next, a method of detecting the operation of the safety device will be described using the lower part of FIG.
In this case, the number N of safety devices is five. Therefore, when the safety device corresponding to S1 of the first detection contact 8 from the voltage supply source side operates, the detection voltage V1 in the monitoring device 9 is expressed by the following equation (2) using (1). Is done.
V1 = Vs− {5- (1-1)} · ΔV = Vs−5ΔV (2)

Moreover, the detection voltage V2-V5 when the safety device corresponding to S2-S5 of the detection contact 8 operate | moves by the same calculation is represented by following (3) Formula-(6) Formula.
V2 = Vs-4ΔV (3)
V3 = Vs-3ΔV (4)
V4 = Vs-2ΔV (5)
V5 = Vs-1ΔV (6)

  Therefore, as shown in the lower part of FIG. 3, the gradation of the detection voltage V in the monitoring device 9 varies depending on the operation of each detection contact 8. However, V1 to V5 depend on the magnitude of the voltage Vs when not passing through the voltage drop circuit 10. Therefore, the monitoring device 9 sets the difference between the value of the detection voltage V and the value of the voltage Vs at the end opposite to the voltage supply source of the correction wiring 11 as a comparison value corresponding only to the voltage drop of the voltage drop circuit 10. Is set to compare with. Then, regardless of the length of the passenger conveyor 1, the monitoring device 9 compares the difference with the comparison value and detects which safety device has been operated.

  According to the first embodiment described above, the voltage drop circuit 10 is connected in parallel to each of the detection contacts 8 connected in series. And the monitoring apparatus 9 detects the voltage of the edge part on the opposite side to the voltage supply source of the detection contact 8 farthest from the voltage supply source, and detects which safety device operated. This eliminates the need to route a plurality of wires from each safety device. As a result, it is possible to reduce wiring for detecting which safety device has been operated.

  Moreover, the voltage drop circuit 10 consists of resistance. For this reason, it is possible to reduce the wiring for detecting which safety device has been operated with inexpensive components. Further, the monitoring device 9 compares the value of the voltage at the end opposite to the voltage supply source of the detection contact 8 farthest from the voltage supply source and the voltage at the end opposite to the voltage supply source of the correction wiring 11. The difference from the value is compared with a preset comparison value to detect which safety device has been operated. For this reason, only when the cost of the correction wiring 11 is increased, even if it is assumed that a voltage drop due to the conductor occurs due to the long wiring length of the passenger conveyor 1 having a long overall length, it is certain which safety device has been operated. Can be detected.

1 passenger conveyor, 2 drive chain safety device, 3 speed governor,
4 Skirt guard safety device, 5 Inlet safety device,
6 Step abnormal running detection device, 7 Handrail slip detection device, 8 Detection contact,
9 Monitoring device, 10 Voltage drop circuit, 11 Correction wiring

Claims (3)

A plurality of detection contacts connected in series to the voltage supply source and opened in response to the operation of each of a plurality of safety devices provided on the passenger conveyor;
A plurality of voltage drop circuits provided in proximity to each of the plurality of detection contacts and connected in parallel to each of the plurality of detection contacts;
A monitoring device that detects the voltage at the end of the detection contact farthest from the voltage supply source opposite to the voltage supply source to detect which safety device has been operated;
A control device for a passenger conveyor.   2. The passenger conveyor control device according to claim 1, wherein the plurality of voltage drop circuits include resistors. A wiring for correction arranged along the wiring of the plurality of detection contacts, and connecting the voltage supply source and the monitoring device without passing through the detection contact and the voltage drop circuit,
The monitoring device includes a voltage value at an end of the detection contact farthest from the voltage supply source opposite to the voltage supply source and a voltage at an end of the correction wiring opposite to the voltage supply source. 3. The passenger conveyor control device according to claim 1, wherein the safety device is detected by comparing a difference between the safety value and a predetermined value with a preset comparison value. 4.

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