CN2229917Y

CN2229917Y - Device for monitoring and controlling working condition and trouble of escalator

Info

Publication number: CN2229917Y
Application number: CN 93224399
Authority: CN
Inventors: 施涛昌
Original assignee: XUNDA LIFT CO Ltd SUZHOU
Current assignee: XUNDA LIFT CO Ltd SUZHOU
Priority date: 1993-09-16
Filing date: 1993-09-16
Publication date: 1996-06-26
Anticipated expiration: 2003-09-16

Abstract

The utility model relates to a digital indicator which is used for monitoring and controlling escalator operation and the operating status of each safety protection switch. When a safety switch action rises for some reason and results in the out-of-service of the escalator, maintenance personnel can rapidly find the safety switch sending out the action and remove the trouble in time by means of the code displayed by the utility model to make the escalator resume operation. The utility model is characterized in that the monitoring and controlling device is mainly composed of a digital integrated circuit and a digital display, wherein, state information are led in by safety protection switches, an operation control relay, and contacts of a contactor; the digital display is driven by a coding and decoding circuit to display corresponding two-bit digital codes.

Description

Escalator operation and failure monitoring device

The utility model escalator operation and failure monitoring device (hereinafter to be referred as control monitor unit) are a kind of numeric display units that is used for monitoring each safety protection switch operating state in staircase operation and the staircase safety return circuit.By means of this control monitor unit; the maintainer can monitor the running state of staircase at any time; when staircase is out of service because of safety protection switch moves; code according to the control monitor unit demonstration; can find the safety protection switch of this action easily; trouble-shooting in time resumes operation staircase rapidly.

Present homemade escalator does not also have this control monitor unit, and what have also only is the state of indicating each safety switch with indicator lamp.This differentiation to more than ten safety switch operating state being distributed in upper and lower horizontal segment of staircase and tilting section brings a lot of inconvenience.

Task of the present utility model is a kind of numeric display unit of design, to the running state of staircase with because of breaking down or the code that fatal accident causes the safety switch display setting that moves takes place the occupant, this code is identical with code as shown in the escalator (as MICONIC F) of external introduction.

Feature of the present utility model is: control monitor unit mainly is made up of integrated circuit and nixie display, is installed in respectively on two printing formes.Integrated circuit and corresponding electronic devices and components are welded on the printing forme, are installed in the control box of lower end.Nixie display is welded on another piece printing forme, is installed in the side of lower end control box, sees through two slots on the side panel, can clearly see the code that two digital pieces show.Connection between two printing formes realizes in the connector mode with cable.The status information of staircase operation is introduced the corresponding input end of control monitor unit by the contact of AC contactor, control loop relay and the safety return circuit relay of control staircase uplink and downlink; failure message is introduced control monitor unit by each safety protection switch in the safety return circuit by cable; drive nixie display, the two digits code of display setting by coding and decoding scheme.

Coding that the utility model is used and decoding scheme are made up of the C304 decimal scale-BCD coder and gate circuit.Status information and failure message are sent into the input end of C304 coder and gate circuit, by the logical combination output signal of gate circuit, light digital piece corresponding digital stroke section.The truth table of C304 coder is as shown in table 1.

Also have an oscillator of being made up of 555 time base circuits that is subjected to relay control in the circuit of the present utility model, it exports light-emitting diode of termination.Under the situation of nonserviceabling, except that showing the corresponding digital code, also send signal by gate circuit, make the relay adhesive after amplifying, control generator work is sent oscillating impulse and is made LED flash.

The utility model will be illustrated more clearly in the accompanying drawing of the following example.

Fig. 1 is the distribution schematic diagram of each safety switch on staircase.

Fig. 2 is staircase safety return circuit figure.

Fig. 3 (a) is the control monitor unit logical diagram (b).

Fig. 4 is the connection schematic diagram of digital piece.

Table 1

Input	Output (binary-coded decimal)
Input	Output (binary-coded decimal)				Decimal digit	D	C	B	A
0 1 2 3 4 5 6 7 8 9	0 0 0 0 0 0 0 0 1 1	0 0 0 0 1 1 1 1 0 0	0 0 1 1 0 0 1 1 0 0	0 1 0 1 0 1 0 1 0 1	Decimal digit	D	C	B	A

In Fig. 1,1. be dragging chain tensioning safety switch KKS, 2. be the unusual safety switch KKP of fishback, 3. be inlet of handrail foreign matter safety switch KHLE, 4. being apron plate safety switch KSL, 5. being the sagging safety switch KKA of step, 6. is the disconnected safety switch KAK of driving chain.

As shown in Figure 2, the staircase safety return circuit is by each safety protection switch, compositions such as stop button DH-B, DH-T, scram button JH-B and safety return circuit relay SRE.Alphabetical connotation among the figure: B-lower end, T-upper end, L-left side, R-right side, for example KKP-BL represents to be installed in the unusual safety switch of fishback in left side, staircase lower end; DH-T represents to be positioned at the stop button on the button box of upper end, and remainder roughly the same.JH-B is the pull-toggle type button that has closing appliance, its closing of contact when pulling out, its contact open when pushing.The contact pattern of safety protection switch except that apron plate safety switch KSL, be one often open one normally closed, independent mutually, normally closed contact access security loop, open contact is used for the signal input of control monitor unit.The contact of KSL is the change type contact, interacts for avoiding alternating current-direct current, and its contacts status is by apron plate relay R SSL input monitoring device.After staircase send electricity, when safety return circuit is closed, the SRE adhesive, the closed staircase Drive and Control Circuit of connecting of its open contact, staircase can starting operation; When safety return circuit disconnected, SRE discharged, the control loop outage, and staircase is out of service.

Among Fig. 3, SR-U and SR-D are the ac contactor contact of control staircase uplink and downlink, electric upward interlocking.During the SR-U adhesive, staircase is up; During the SR-D adhesive, staircase is descending.SFE is the control loop relay, and the state of its contact is: when the SRE adhesive, and the SFE closure; When SR-U or SR-D adhesive, SFE disconnects.

Control monitor unit is as follows with digital integrated circuit:

D1-C304 the decimal scale-BDE code coder

D2.3-4069 hex inverter D4-4,078 eight input joint denial gates

D5.6-4,049 six inverter buffer D7-4,081 two inputs 4 and door

D8-4,082 four inputs are two imports 3 NAND gate with door D9.13-4,023 three

Two NAND gate D12-4,011 two inputs of D10.11-4,012 four inputs 4 NAND gate

Two or the door of D14-4,072 four inputs

The utility model is as shown in table 2 to the code of the operation of staircase and faulty condition monitoring display.Now (b) be described as follows in conjunction with Fig. 3 (a): the staircase power supply, light-emitting diode HL3 (yellow) is bright, and the indication control monitor unit is working properly with the 12V DC regulated power supply.As the safety return circuit closure, light-emitting diode HL2 (green) is bright, and the SRE adhesive makes SFE adhesive immediately, this moment, the incoming signal of C304 was decimal digit " 0 ", and it is output as 8-4-2-1BCD sign indicating number " 0000 ", and a telltale position shows 0, ten show d, and d0 represents staircase preparation operation.When pressing up button, SR-U adhesive self-insurance, SFE releases receipts, and C304 is input as the decimal scale " 3 ", is output as " 0011 ", and telltale shows dU after deciphering, and the expression staircase is in uplink state.In like manner, when pressing descending button, SR-D adhesive self-insurance, being input as of C304 " 4 " is output as " 0100 ", shows dd this moment.In operational process, if because of certain reason makes certain safety switch (as KKP-BR) action, safety return circuit disconnects, SRE discharges and makes the control loop outage, staircase is out of service, this moment, the incoming signal of C304 was " 5 ", was output as " 0101 ", and telltale shows 15, joint denial gate D4 output low level, after D3 is anti-phase, make transistor VT conducting, the relay K adhesive, its normally closed contact disconnects, HL2 extinguishes, its open contact closure, the multi-vibrator of being made up of 555 time base circuits gets electric, sends oscillating impulse and makes luminotron HLI (redness) flicker.Other shown code in safety switch action back can be by same methods analyst.Staircase is in operational process, if make the contact open (being in " pushing " position) of the scram button JH-B that is positioned at control box end, lower end, then SRE SFE all is in release position reveal codes AO this moment.

Telltale adopts the digital piece LDD581R of anode connection altogether, lights when each digital stroke section connects low level.Individual position shows that the output relation of each stroke section and C304 is expressed as follows with the Boolean function formula:

Ten logical relations that show each stroke section and input are easy to analyze according to Fig. 3 (b), have just repeated no more at this.The logic level that native system is used, high level " 1 " is 12V, low level " 0 " is 0V.

Table 2

Running state	Reveal codes
Running state	Reveal codes	Preparing the operation upstream and downstream suddenly stops	d0 dU dd AO
Faulty condition	Reveal codes		d0 dU dd AO
Faulty condition	Reveal codes	The sagging safety protection switch KKA of the disconnected safety protection switch KAK step of inlet of handrail safety protection switch KHLE-B dragging chain tensioning safety protection switch KKS drive chain under the fishback safety protection switch KKP-B under the upper inlet of handrail safety protection switch KHLE-T skirt panel safety protection switch KSL of upper comb dent plate safety protection switch KKP-T	10 11 12 15 16 17 18 19

Claims

1; escalator operation and failure monitoring device are a kind of numeric display units that is used for monitoring each safety protection switch operating state in staircase operation and the safety return circuit; it is characterized in that this device mainly is made up of integrated circuit and nixie display; integrated circuit and corresponding electronic devices and components are welded on the printing forme; be installed in the side of lower end control box; can clearly see the code that two digital pieces show through two slots on the side panel; connection between two printing formes realizes in the connector mode with cable; the status information and the failure message of staircase operation are held up on the younger brother by control respectively; descending AC contactor; the control loop relay; control monitor unit is introduced in the contact of safety return circuit relay and each safety protection switch; drive nixie display by coding and decoding scheme; the two digits code of display setting makes light-emitting diode HLI flicker under nonserviceabling.

2, device according to claim 1, it is characterized in that coding and decoding scheme are by the D1C304 decimal scale--BCD coder and gate circuit D2～D14 form, running state and fault status information are sent into the input end of D1, D3, D6 and D14, by the logical combination of D2, D3, D7, D8, D9, D10, D11, D12, D13, drive two digital pieces by D5, D6 output.

3, device according to claim 1, it is characterized in that the oscillator of forming by 555 time base circuits that is subjected to relay control by one, light-emitting diode HLI of its output termination, fault status information is sent into D4, its output is anti-phase through D3, control relay K after transistor VT amplifies is worked by the relay K control generator.