CN208345555U - Escalator senses emergency stop device - Google Patents

Abstract

A kind of escalator sensing emergency stop device, it includes controller, it further include the emergency stop sensing zone of setting on the escalator, the controller include the first relay, the second relay, the first control relay circuit and the second control relay circuit, the first relay contact and the second relay contact series connection access escalator driving mechanism power supply line in；Emergency stop sensing zone includes the first contact terminal and the second contact terminal that set distance is kept under normality, under normal conditions, first control relay circuit and the second control relay circuit drive the first relay and the second relay to make the contact of the first relay and the contact closure of the second relay, in case of emergency, external force contacts the first contact terminal and the second contact terminal, first control relay circuit and the second control relay circuit drive the first relay and the second relay to open the contact of the first relay and/or the normal contact of the second relay, to keep escalator out of service.Escalator sensing emergency stop device provided by the utility model is easy to use, reliable performance, can manipulate with self-diagnosis system failure and Anywhere in escalator length range, to guarantee the personal safety to passenger-in-elevator when contingency occurs.

Description

Escalator senses emergency stop device

Technical field

Emergency stop device is sensed the utility model relates to a kind of escalator, more particularly to a kind of easy to use, reliable performance, It can be with self-diagnosis system failure and the safe and reliable escalator that can be Anywhere manipulated in escalator length range Sense emergency stop device.

Background technique

The scram button of existing escalator is installed in the top of escalator or a scram button of bottom.When certainly When passenger-in-elevator on dynamic staircase is because of unexpected cause danger, take people apart from above-mentioned emergency stop open pipe it is too far etc. due to, can not touch And emergency stop open pipe, escalator can not stop rapidly, lead to that life injury of the passenger-in-elevator because falling generation occurs.

The Chinese utility model patent of notification number CN 205709419U discloses the safeguard protection dress on a kind of escalator It sets, it includes drawstring and pull switch, and drawstring is disposed to extend the lower section in step or pedal along the length direction of escalator, One end is fixed, and the other end is connected with pull switch；Pull switch is provided with for connection stay cord and switch contact is driven to move Dynamic touch component, the stroke for touching component successively has from inside to outside to be pulled out triggering section, work normally section and retracts triggering section, When step or pedal are in the state of sinking, drawstring is pressed down and will touch component and be drawn out to pull-out triggering section, pull switch quilt Trigger and issue the signal of stop escalator；When escalator is in normal operating conditions, touches component and be located at normal work Make in section, pull switch is not triggered；When drawstring fracture, touches component and be retracted inwardly to retract triggering section, pull switch quilt Trigger and issue the signal of stop escalator.

The Chinese utility model patent of notification number CN 206590751U discloses a kind of electricity cut-off type escalator safety Protective device and escalator, it includes electricity cut-off type conductive plate and connecting plate, and conductive plate and connecting plate are along escalator length side To handrail lower part is arranged in, contact of the upper and lower circuit of conductive plate respectively with the emergency stop button up and down of escalator electrically connects It connects.When the people for taking escalator occurs unexpected, directly electricity cut-off type conductive plate can be smashed by hand or foot, cutting is certainly Dynamic staircase control loop, thus reach control escalator emergency stop action, the mesh that protection passenger-in-elevator will not be injured by escalator 's.

In patent document 1, although the safety guard can realize the whole detection of the step or pedal of escalator, Once there is the emergency for step or pedal, it can effectively ensure the life security of passenger, but be directed to and for example purchase Object vehicle slides, artificially plays and quarrels and fights noisily tumble or other emergencies occur, which can not allow staircase to stop at all, and body is in ladder Grade or pedal repeatedly scratch, and in turn result in personal safety accident.

The whole-process control during escalator operation may be implemented in the safety guard mentioned in patent document 2, Once an emergency situation is encountered by passenger-in-elevator, emergency braking can be carried out to realize the person to escalator by smashing the movement of conductive plate The effect of protection.However, it may be a very quick moment that emergency, which on the one hand occurs, boarding person's development has limitation Property；On the other hand it needs just trigger emergency stop switch by smashing conductive plate, and the power smashed is bigger, emergency situation servant Sense of independence can reduce, so its drawback is also more obvious.Another problem is that its structure is complicated, and manufacturing cost is high, and And be disposable products, operation and maintenance cost is all higher.It is also very big therefore, it is necessary to solve the problems, such as.

Utility model content

The technological deficiency of contingency, the goal of the invention of the utility model can not effectively be evaded to solve existing escalator Be to provide a kind of easy to use, reliable performance, can with self-diagnosis system failure and can in escalator length range it is any The safe and reliable escalator of place manipulation senses emergency stop device, to guarantee the person to passenger-in-elevator when contingency occurs Safety.

To realize the goal of the invention, the utility model provides a kind of escalator sensing emergency stop device comprising control Device, which is characterized in that further include setting emergency stop sensing zone on the escalator, the controller includes the first relay, the Two relays, the first control relay circuit and the second control relay circuit, the first relay contact and the touching of the second relay In the power supply line of the driving mechanism of point series connection access escalator；Emergency stop sensing zone includes that the of set distance is kept under normality One contact terminal and the second contact terminal, under normal conditions, the first control relay circuit and the driving of the second control relay circuit First relay and the second relay make the contact of the first relay and the contact closure of the second relay, in case of emergency, External force contacts the first contact terminal and the second contact terminal, and the first control relay circuit and the second control relay circuit drive Dynamic first relay and the second relay open the contact of the first relay and/or the normal contact of the second relay, to make Escalator is out of service.

Preferably, control relay circuit includes sampler, and the sampler includes at least first resistor and second resistance, Wherein, first resistor and second resistance are connected between power supply and ground after being connected in series, and wherein intermediate node gives the first relay driving The second relay drive circuit of circuit provides signal；The both ends of first resistor are connected to the first contact terminal and the second contact Terminal.

Preferably, control relay circuit includes emergency stop detector, and the emergency stop detector includes first comparator, described First comparator includes the first operational amplifier IC1,3rd resistor R9 and the 4th resistance R8, wherein 3rd resistor R9 is connected to Between the output end and in-phase end of first operational amplifier, the output end of sampler is connected to the first operation through the 4th resistance R8 and puts The in-phase end of big device, the first reference voltage are connected to the reverse side of the first operational amplifier.

Preferably, control relay circuit includes tracer, and the tracer includes second operational amplifier IC2, the 5th resistance R11 and the 6th resistance R10, wherein the 5th resistance R11 is connected to the output end of second operational amplifier and same Between phase end, the output end of sampler is connected to the reverse side of second operational amplifier, and the second reference voltage is through the 6th resistance R10 It is connected to the in-phase end of second operational amplifier, the first reference voltage is lower than the second reference voltage.

Preferably, control relay circuit further includes " with door " circuit, " with the door " circuit include first diode D1, Second diode D2, the 7th resistance R12 and the 8th resistance R14, wherein the cathode of first diode D1 is connected to first comparator Output end, anode through the 7th resistance R12 and the 8th resistance R14 is connected to power supply；The cathode of second diode D2 is connected to The output end of two comparators, anode are connected to power supply through the 7th resistance R12 and the 8th resistance R14.

Preferably, control relay circuit further includes driving circuit and latching circuit, when " with door " circuit output is low electricity Usually, the driving circuit controls relay, disconnects its contact, when no matter " with door " circuit output is high or low level, from Lock circuit controls relay by driving circuit, remains open its contact.

Preferably, the driving circuit includes the first transistor (Q1), and the output end of " with door " circuit is connected to the first crystalline substance The base stage of body pipe, for the emitter of the first transistor through the 8th resistance eutral grounding, collector is connected to electricity through the line packet of the first relay Source.

Preferably, the latching circuit includes second transistor (Q2), the 9th resistance (R17) and the tenth resistance (R18), In, the emitter of second transistor is grounded, and collector is connected to the base stage of the first transistor, and the first end of the 9th resistance is through first The line packet of relay is connected to power supply, and second end is connected to the base stage of second transistor；The first end of tenth resistance is connected to The base stage of two-transistor, second end are connected to ground.

Preferably, emergency stop sensing zone be installed on escalator handrail side lower plate, skirt panel, handrail introducing port and/or from Dynamic staircase upper and lower opening handrail position prevents the installation position of children from falling.

Preferably, the first contact terminal and the second contact terminal are the preparation of the flexible conducting material prepared by carbon material.

Compared with the safe emergency stop technology of existing escalator, escalator provided by the utility model senses emergency stop device It can reach following the utility model has the advantages that A: in any position of escalator can implement that the brake operating of escalator is prevented from anticipating Injury of the outer accident to passenger.B: when safe flexible sensing buffer zone open circuit or Damage by Short Circuit, safety governor can issue event Barrier instruction, ensure that the reliability service of this security protection system.

Detailed description of the invention

Fig. 1 is the schematic cross-section of emergency stop sensing zone provided by the utility model；

Fig. 2 is the schematic view of the mounting position of emergency stop sensing zone provided by the utility model on the escalator；

Fig. 3 is button emergency stop sensing zone schematic diagram provided by the utility model；

Fig. 4 is the built-up circuit figure of the controller of escalator sensing emergency stop device provided by the utility model；

Fig. 5 is the control flow chart of escalator sensing emergency stop device provided by the utility model.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

In the description of the present invention, it should be noted that term " first ", " second " etc. are used for description purposes only, It is not understood to indicate or imply relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be electrical connection, it is also possible to be connected directly, can also can also be inside two elements indirectly connected through an intermediary Connection, for the ordinary skill in the art, can understand the tool of above-mentioned term in the present invention with concrete condition Body meaning.

Fig. 1 is the schematic cross-section of emergency stop sensing zone provided by the utility model, as shown in Figure 1, according to the utility model One embodiment, emergency stop sensing zone include that along the first direction X elastic housing 1 extended and upper surface and following table inside the shell is arranged Face and the first contact terminal 2 and the second contact terminal 3 extended in a first direction, first contact terminal 2 and the second contact Terminal 3 is relatively prominent respectively, and the first contact terminal 2 connect by conducting wire 5 with external circuit, the second contact terminal 3 pass through conducting wire 4 and External circuit connects, and first direction is the direction that front and back extends in Fig. 1.

According to the utility model one embodiment, first contact terminal 2 and the second contact terminal 3 are in a second direction The section of Y and third direction Z at least partially triangle.First direction X, second direction Y and third direction Z are in right-handed scale (R.H.scale) System.

First contact terminal 2 and the second contact terminal 3 are the preparation of the flexible conducting material prepared by carbon nanomaterial, non- When stress, the first contact terminal 2 and the second contact terminal 3 are separated by the distance of setting, connect in the first contact terminal and second A cavity is formed between contravention.When stress, the first contact terminal 2 and the second contact terminal 3 are electrically connected with connection.It uses When, the shell of emergency stop sensing zone is adhered to support surface by adhesive layer 15

Fig. 2 is the schematic view of the mounting position of emergency stop sensing zone provided by the utility model on the escalator, such as Fig. 2 institute Show, emergency stop sensing zone can be mounted on the interior plate 11 under automatic staircase handrail band, such as button emergency stop sensing zone；May be used also Emergency stop sensing zone is mounted on skirt panel position 12, such as button emergency stop sensing zone；Also emergency stop sensing zone can be mounted on handrail To prevent children from falling on tape entry backplate 13；Can also by emergency stop sensing zone on inlet of handrail backplate 14 to prevent foreign matter or folder It hurts sb.'s feelings.Escalator manufacturer according to actual installation occasion and requirement, can determine the setting and installation type of emergency stop sensing zone.

Fig. 3 is button emergency stop sensing zone schematic diagram provided by the utility model, as shown in figure 3, being implemented according to one The corresponding site of staircase 6 is arranged in example, button emergency stop sensing zone.It is evenly arranged in escalator sidewall 6 along first direction multiple Opening is provided with the support slot 7 for accommodating emergency stop sensing zone along first direction, and emergency stop sensing zone is adhered to by adhesive layer 15 On surface in support slot.The outwardly extending part in two sides top of the support slot 7 is fixed on the side of opening.Multiple openings For setting button component, the button assembly includes that key support 9, flexible keypad 8 and acrylic key protect window 10, described to press Key bracket 9 is set in opening and is used to support flexible keypad 8, it is generally the case that the lower part of flexible keypad 8 and emergency stop sensing zone 1 Contact, key shield window 10 are set to 8 top of flexible keypad, in emergency circumstances when, user smashes key shield window 10, into one Step pressing flexible keypad 8, makes the first of emergency stop sensing zone to connect contact terminal 2 and the second contact terminal 3 is in electrical contact.

Fig. 4 is the built-up circuit figure of the controller of escalator sensing emergency stop device provided by the utility model, this is as schemed Shown in 4, the controller includes the first relay J1, the second relay J2, the first control relay circuit and the second relay Control circuit, the driving mechanism of the contact K2 series connection access escalator of the contact K1 and the second relay of the first relay J1 In power supply line, under normal conditions, the first contact terminal 2 and the second contact terminal 3 keep set distance, the first control relay circuit Respectively drive the first relay with the second control relay circuit and the second relay make the first relay contact and second after The normally-closed contact of electric appliance is closed.In case of emergency, emergency stop sensing zone is pressed, the first contact terminal 2 and the second contact terminal 3 connect Touching, the first control relay circuit and the second control relay circuit respectively drive the first relay and the second relay and make first The contact of relay and/or the contact of the second relay are opened, thus keep escalator out of service, in the utility model, two Road relay and its control circuit are mutually redundant setting, and such setting is in order to prevent when driver breaks down all the way, suddenly Stop device is out of control.

According to the utility model one embodiment, controller includes sampler, the sampler include at least resistance R1 and Resistance R2, wherein resistance R1 and resistance R2 is connected between power supply VCC1 and ground after being connected in series, and wherein intermediate node gives the first relay Device J1 driving circuit the second relay J2 driving circuit provides signal；Two contact terminals of emergency stop sensing zone are by conducting wire 4 and lead Line 5 is parallel to the both ends resistance R1, and passes through insurance resistance RS series connection.When a key is pressed, two contact terminals of emergency stop sensing zone Electrical contact.

According to the utility model one embodiment, control relay circuit further includes emergency stop detector, the emergency stop detection Device includes first comparator, and the first comparator includes operational amplifier IC1, resistance R8 and resistance R9, wherein resistance R9 connects It is connected between the output end and in-phase end of the first operational amplifier IC1, the output end of sampler is connected to the first fortune through resistance R8 The in-phase end of amplifier IC1 is calculated, the first reference voltage is connected to the reverse side of the first operational amplifier IC1, first reference Voltage is divided by resistance R6, resistance R5 and resistance R4 and is obtained, and is applied to the voltage of the reverse side of the first operational amplifier,

Under normal circumstances, the in-phase end voltage of the first operational amplifier IC1 is greater than its reverse side voltage, i.e., , at this point, the output end of the first operational amplifier IC1 is high level, the first control relay circuit drives relay J1 closure, from And operate normally escalator；When in case of emergency, when user's pressing keys component, SE is connected, the first operational amplifier The reverse side voltage of IC1 is greater than its in-phase end voltage, i.e.,, at this point, the output end of the first operational amplifier IC1 is Low level, the first control relay circuit drives the first relay J1 to disconnect, to keep escalator out of service.

According to the utility model one embodiment, control relay circuit further includes tracer, the fault detection Second comparator described in device includes second operational amplifier IC2, resistance R11 and resistance R10, wherein resistance R11 is connected to second Between the output end and in-phase end of operational amplifier IC2, the output end of sampler is connected to the reverse phase of second operational amplifier IC2 End, the second reference voltage are connected to the in-phase end of second operational amplifier IC2, and the first reference voltage is lower than the second reference voltage. In the utility model, second reference voltage is divided by resistance R6, resistance R5 and resistance R4 and is obtained, and is applied to the second operation and is put The voltage of the in-phase end of big device IC2.Under normal circumstances, second operational amplifier IC2 In-phase end voltage is greater than its reverse side voltage, i.e.,, at this point, the output end of second operational amplifier IC2 is high electricity Flat, the first control relay circuit drives relay J1 closure, so that escalator be made to operate normally；In fault condition, insurance When resistance RS open circuit or SE and R1 emergency stop sensing zone are disconnected, the reverse side of second operational amplifier IC2 is greater than its in-phase end voltage, I.e., at this point, the output end of second operational amplifier IC2 is low level, the first control relay circuit driving the One relay J1 is disconnected, to keep escalator out of service.

According to the utility model one embodiment, it is additionally provided between sampler and emergency stop detector and tracer Low-pass filter is made of resistance R7 and capacitor C3, is used to filter out high-frequency noise to prevent high-frequency noise from detecting to emergency stop The interference of device and tracer.

According to the utility model one embodiment, control relay circuit further includes " with door " circuit, " with door " electricity Road includes diode D1, diode D2, pull-up resistor, wherein and the cathode of diode D2 is connected to the output end of first comparator, Anode is connected to power supply VCC1 through pull-up resistor；The cathode of diode D1 is connected to the output end of the second comparator, and anode is through upper Pull-up resistor is connected to power supply VCC1, and the pull-up resistor is connected in series by resistance R12 and resistance R14.The utility model is in emergency stop " with door " circuit is set after detector and tracer, or is being broken down in order to no matter in case of emergency In the case of, all guarantee control relay circuits can be such that the normally-closed contact of relay disconnects, so that escalator be kept to stop fortune Row.

According to the utility model one embodiment, the control relay circuit further includes driving circuit and latching circuit, When " with door " circuit output is low level, the driving circuit controls relay, disconnects its contact；No matter " with door " circuit When output is height/or low level, latching circuit controls relay by driving circuit, remains open its contact.The driving Circuit includes transistor Q1, and the output end of " with door " circuit is connected to the base stage of transistor Q1 through bleeder circuit, transistor Q1's Emitter ground connection, collector are connected to power supply through the line packet of the first relay J1.The latching circuit includes transistor Q2, resistance R17 and resistance R18, wherein the emitter of transistor Q2 is grounded, and collector is connected to the base stage of transistor Q1, the R17's of resistance Line packet of the first end connection through relay J1 is connected to power supply, and second end is connected to the base stage of transistor Q2；The of the R18 of resistance One end is connected to the base stage of transistor Q2, and second end is connected to ground.In the utility model, when user presses the button, IC1 output Low level, diode D2 conducting, the base stage of transistor Q1 are low electrode, and the contact of Q1 cut-off, relay J1 disconnects, and staircase stops Operation, transistor Q2 conducting, current collection extremely low potential, at this point, if user unclamps key, operational amplifier IC1 and IC2 output High level, diode D1 and diode D2 cut-off, power supply VCC1 provide high potential to the base stage of transistor Q1, but since Q2 is led It is logical, therefore, keep Q1 still off, the contact of relay J1 disconnects, and staircase is still out of service.

According to the utility model one embodiment, control relay circuit further includes third comparator, third comparator packet The anode for including operational amplifier IC3 and resistance R12, diode D1 and diode D2 is connected to operational amplifier IC3 through resistance R12 In-phase end, the reverse side of operational amplifier IC3 is connected to the second reference voltage, and the output end of operational amplifier IC3 is through resistance R13 is connected to the input terminal of relay driver, that is, the base stage of transistor Q1.When first comparator and/or the second comparator When output is low level, the voltage of the in-phase end of operational amplifier IC3 is lower than the voltage of its reverse side, exports as low level, such as This guarantees that the driving circuit of relay disconnects the normally-closed contact of the first relay J1；When first comparator and the/the second comparator Output when being high level, the voltage of the in-phase end of operational amplifier IC3 is higher than the voltage of its reverse side, export as high level, Due to there is latching circuit, as long as having been turned on emergency stop device, escalator is still out of service.

In the utility model, the purpose of setting C1, C2 and C3 are for filtering clutter.In the collector and ground of transistor Q1 Between setting diode D3 be for protective relay.

In the utility model, the structure of the control circuit composition of the control circuit of the first relay J1 and the second relay J2 It is identical, including institute's emergency stop detector as described above, tracer, third comparator, relay drive circuit, here no longer It repeats.

Emergency stop device shown in Fig. 4 passes through the current potential of detection node C, further passes through first comparator and the second comparator Be compared respectively with the first reference voltage and the second reference voltage and decision circuitry whether failure or whether by by emergency stop by Key crushes.

Fig. 5 is the control flow chart of escalator sensing emergency stop device provided by the utility model, as shown in figure 5, according to Another embodiment of the utility model, the utility model provides escalator sensing emergency stop device can also be by judging sensor Impedance and the working condition for controlling the first and/or second relay, specific steps include:

The step of judging sensor impedance, in the step, if the impedance of sensor is greater than the upper limit, illustrate circuit have therefore Barrier, then the first control relay circuit disconnects the contact of the first relay and the second relay, in this way, escalator stops fortune Row；If the impedance of sensor is less than the upper limit, judge whether the impedance of sensor is less than lower limit, if it is, explanation is useful Family has pressed button sensing zone key, crushes, and object, which falls, waits cases of emergency, makes the first relay and the second relay The normally closed disconnection of device, in this way, escalator is out of service；If the impedance of sensor is less than the upper limit, and is greater than lower limit, illustrate electricity Road fault-free and without case of emergency occur, then make the normally-closed contact of the first relay and the second relay be closed, escalator is just Often work.In Fig. 4, sensor is in parallel to be connected in series with RS again and form by SE and resistance R1.According to another implementation of the utility model Example, sensor can be also in parallel with resistance R1 again by one resistance RX of emergency stop sensing zone series connection, then concatenate an insurance resistance group again At the insurance resistance is opened a way when electric current is larger.

Above in conjunction with attached drawing, the working principle of the utility model is described in detail.But those skilled in the art It should be understood that specification is only for interpreting the claims.But the protection scope of the utility model is not limited to specification. Anyone skilled in the art in the technical scope that the utility model discloses, the variation that can readily occur in or Replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be wanted with right It asks subject to the protection scope of book.

Claims (10)

1. a kind of escalator senses emergency stop device comprising controller, which is characterized in that further include being arranged on the escalator Emergency stop sensing zone, the controller include the first relay, the second relay, the first control relay circuit and the second relay The power supply line of the driving mechanism of device control circuit, the first relay contact and the second relay contact series connection access escalator In；Emergency stop sensing zone includes the first contact terminal and the second contact terminal that set distance is kept under normality, under normal conditions, the One control relay circuit and the second control relay circuit, which respectively drive the first relay and the second relay, makes the first relay The contact closure of the contact of device and the second relay, in case of emergency, external force make the first contact terminal and the second contact terminal Contact, the first control relay circuit and the second control relay circuit respectively drive the first relay and the second relay makes the The contact of one relay and/or the normal contact of the second relay are opened, to keep escalator out of service.

2. escalator according to claim 1 senses emergency stop device, which is characterized in that control relay circuit includes adopting Sample device, the sampler include at least first resistor and second resistance, wherein first resistor and second resistance connect after being connected in series Between power supply and ground, wherein intermediate node provides signal to the first control relay circuit and the second control relay circuit；The The both ends of one resistance are connected to the first contact terminal and the second contact terminal.

3. escalator according to claim 2 senses emergency stop device, which is characterized in that control relay circuit includes anxious Stop detector, the emergency stop detector includes first comparator, the first comparator include the first operational amplifier (IC1), 3rd resistor (R9) and the 4th resistance (R8), wherein 3rd resistor (R9) is connected to the output end of the first operational amplifier and same Between phase end, the output end of sampler is connected to the in-phase end of the first operational amplifier through the 4th resistance (R8), and first with reference to electricity Pressure is connected to the reverse side of the first operational amplifier.

4. escalator according to claim 3 senses emergency stop device, which is characterized in that control relay circuit further includes Tracer, the tracer include second operational amplifier (IC2), the 5th resistance (R11) and the 6th resistance (R10), wherein the 5th resistance (R11) is connected between the output end of second operational amplifier and in-phase end, the output of sampler End is connected to the reverse side of second operational amplifier, and the second reference voltage is connected to the second operation amplifier through the 6th resistance (R10) The in-phase end of device, the first reference voltage are lower than the second reference voltage.

5. escalator according to claim 4 senses emergency stop device, which is characterized in that control relay circuit further includes " with door " circuit, " with the door " circuit include first diode (D1), the second diode (D2), the 7th resistance (R12) and Eight resistance (R14), wherein the cathode of first diode (D1) is connected to the output end of first comparator, and anode is through the 7th resistance (R12) and the 8th resistance (R14) is connected to power supply；The cathode of second diode (D2) is connected to the output end of the second comparator, Anode is connected to power supply through the 7th resistance (R12) and the 8th resistance (R14).

6. escalator according to claim 5 senses emergency stop device, which is characterized in that control relay circuit further includes Driving circuit and latching circuit, when " with door " circuit output is low level, the driving circuit controls relay, makes its contact It disconnects；When no matter " with door " circuit output is high or low level, latching circuit controls relay by driving circuit, makes its contact It remains open.

7. escalator according to claim 6 senses emergency stop device, which is characterized in that the driving circuit includes first The output end of transistor (Q1), " with door " circuit is connected to the base stage of the first transistor, and the emitter of the first transistor is through the 8th Resistance eutral grounding, collector are connected to power supply through the line packet of relay.

8. escalator according to claim 7 senses emergency stop device, which is characterized in that the latching circuit includes second Transistor (Q2), the 9th resistance (R17) and the tenth resistance (R18), wherein the emitter of second transistor is grounded, and collector connects It is connected to the base stage of the first transistor, the first end of the 9th resistance is connected to power supply through the line packet of relay, and second end is connected to The base stage of two-transistor；The first end of tenth resistance is connected to the base stage of second transistor, and second end is connected to ground.

9. escalator according to claim 1-8 senses emergency stop device, which is characterized in that emergency stop sensing zone peace Children are prevented loaded on escalator handrail side lower plate, skirt panel, handrail introducing port and/or escalator upper and lower opening handrail position The installation position fallen.

10. escalator according to claim 9 senses emergency stop device, which is characterized in that the first contact terminal and second Contact terminal is the preparation of the flexible conducting material prepared by carbon material.