CN1030734A

CN1030734A - The spindle braking system of escalator

Info

Publication number: CN1030734A
Application number: CN88103632A
Authority: CN
Inventors: 北村茂治
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1987-06-16
Filing date: 1988-06-15
Publication date: 1989-02-01
Also published as: GB2207718A; KR940001404Y1; GB8814342D0; JPH0742070B2; JPS63315483A; KR890000338A; CN1007514B; GB2207718B

Abstract

The present invention relates to a kind of spindle braking system of escalator.Comprise in order to coiling be equipped with the stair tread conveyer chain drive sprocket and driven sprocket, be contained in ratchet on the above-mentioned drive sprocket main shaft, make cantilever that the one end is meshed with ratchet, make cantilever along the magnet coil of removing the swing of ingear direction by the elastic force of elastomeric element, its improvement is that the other end at described cantilever is provided with and prevents cantilever instantaneous driven damper under the elastomeric element effect.Therefore, can make spindle brake, thereby avoid causing staircase sharply to stop owing to motor brake and spindle brake move simultaneously than motor brake delayed action.

Description

The spindle braking system of escalator

The present invention relates to the spindle braking system of escalator.

Fig. 6 and Fig. 7 represent the spindle braking system of this escalator in the past.Be respectively equipped with drive sprocket 2 and driven sprocket 3 in the upper and lower in building, pedal conveyer chain 1a volume is enclosed within on 2 and 3, and stair tread 1 is housed on the conveyer chain 1a.Be equipped with on the main shaft 4 of drive sprocket 2 and also be equipped with by movable sprocket 5, chain drive-belt 8 volumes are enclosed within sprocket wheel 5 and drive the drive sprocket 5 of retarder 6 and drive on the drive sprocket 7 of retarder 6.Come the power of self-driven retarder 6 to pass to drive sprocket 2 by chain 8.Motor 9 and driving retarder 6 direct connections are equipped with drg 10 on the axle of motor 9.

Drg 10 is used for making stair tread 1 braking when escalator stops, promptly the braking force of drg 10 reaches drive sprocket 2 by driving retarder 6 and chain drive-belt 8.Therefore, in case chain 8 fractures, drive sprocket 2 will be in the brakeless state, so be loaded with on the stair tread 1 under many passengers' the situation, because passenger's deadweight, being in the operating staircase that rises will turn round downwards conversely, will quicken downward running and be in the operating staircase that descends, and this all is breakneck.Therefore, to be provided with usually can be directly to the spindle brake of main shaft 4 brake activation power.

Fig. 7 illustrates a kind of like this spindle braking system, and its ratchet 11 is fixing with main shaft 4 frictions, and the pawl 11a of cantilever 12 and sour jujube opinion 11 is not meshed when flat, and when chain drive-belt 8 fractures, cantilever 12 begins to move and mesh with pawl 11a.

Though as above the spindle braking system of Gou Zao escalator in the past can play a role effectively for the fracture of chain drive-belt, but when the power transmission member beyond the gear that drives retarder etc., the chain drive-belt took place when damaged or makes the braking failure of motor drive shaft for a certain reason, stair tread still can not obtain braking force.

Therefore, except the drg of motor drive shaft, for example, as a kind of can be directly to the spindle braking system of main shaft brake activation power, at first propose a plan and published the spy and opened in the clear 59-97985 patent by the present patent application people.This spindle braking system be provided with by magnet coil outage and with the cantilever of ratchet engaged, this ratchet is crimped on by friction material with the flange of main shaft.When staircase stops, thereby just make the magnet coil outage make main shaft can be subjected to the effect of braking force.Therefore, during fault beyond chain drive-belt fracture occurring, when for example motor brake lost efficacy, escalator safety is stopped.

Yet, resemble the spindle braking system of the escalator in the past above, under the situation outside chain drive-belt 8 fractures, when spindle brake and motor drive shaft drg 10 work simultaneously, owing to the magnet coil outage makes cantilever and ratchet engaged cause spindle brake preferentially to move than said motor shaft brake 10, and under the situation to staircase brake activation power, the stepping stopping distance of staircase will shorten, promptly because the meeting that sharply stops of staircase produces the danger that the passenger falls, cantilever with ratchet engaged also can produce impact shock owing to the effect of elastic force simultaneously, causes braking failure some problems like this with the engagement disengagement of ratchet.

The objective of the invention is to address the above problem, obtain following spindle braking system in the common service stopping of escalator or because the action of safety device etc. and when stopping promptly etc. that passenger conveyer band stops under the situation, this device can make the spindle brake action, and, when spindle brake and motor drive shaft drg are done the time spent simultaneously, the motor drive shaft drg is preferentially moved, and when staircase soon stops, making the action of spindle brake input, thereby can prevent sharply stopping of staircase.

Escalator spindle braking system of the present invention consists of the following components: in order to the drive sprocket and the driven sprocket of coiling pedal conveyer chain (stair tread is housed), be installed in ratchet on the above-mentioned drive sprocket main shaft, rely on the elastic force effect one end of elastomeric element can be with the cantilever of this ratchet engaged, cantilever is shaken to remove the ingear magnet coil with ratchet, the other end that particularly is arranged on above-mentioned cantilever be used to prevent that cantilever is by the damper of the instantaneous driving of elastomeric element.

In the present invention, be arranged at the damper of the cantilever other end owing to can suppress the elastic reaction of elastomeric element to cantilever, therefore, not only in common service stopping or because the action of safety device etc. and promptly stop Shi Douke and make the action of spindle brake input, and can make spindle brake, thereby avoided causing staircase sharply to stop owing to motor brake and spindle brake move simultaneously than motor brake delayed action.

Embodiments of the invention are described with reference to the accompanying drawings.

As depicted in figs. 1 and 2, fixing flange 13 on the main shaft 4, the medial surface of flange 13 is provided with circular protrusion 14.Have a plurality of open-works 15 on the circumference of this projection, bolt 16 inserts in the open-work 15.Have open-work 18 on the auxiliary plectane 17 of ring-type, be sleeved on the bolt 16 with coil spring 19 by open-work 18.The head of bolt 16 is provided with screw 20, and screw rod 21 is screwed in the screw 20.The pressure pipe 22 that has flange is enclosed within on the screw rod 21 and also can moves flexibly on screw rod.Nut 23 is screwed on the screw rod 21.The two ends of coil spring 19 respectively with the flange crimping of auxiliary plectane 17 and pressure pipe 22, therefore, fastening nut 23, pressure pipe 22 just moves on one side to auxiliary plectane 17, coil spring 19 is pressed on the auxiliary plectane 17 as a result.Auxiliary plectane 17, bolt 16, coil spring 19 constitute following welded part A, and its effect is that ratchet is crimped on the flange 13.

Between above-mentioned flange 13 and auxiliary plectane 17, accompany ring-type ratchet 24.The pad 25 that friction material is made is equipped with in the both sides of ratchet 24, and bolt wheel 24 is subjected to the extruding of flange 13 and auxiliary plectane 17 by pad 25.This squeese pressure can be regulated by the degree of tightening of above-mentioned nut 23.

The periphery of ratchet 24 is installed facing to circular protrusion 14, but direct contact not, and between inserts low-friction coefficient materials 26 such as polyfurolresin sheet.

Among Fig. 1 27 is cantilever, and it is installed on the supporting seat 28 by pin 29 and can freely swings around pin 29, and an end of cantilever can be meshed with the pawl 24a of ratchet 24, and the other end is subjected to clockwise elastic force effect under the effect of spring 30.And then between the other end of cantilever 27 and pin 29, connecting pin 31 is housed, couple together with cantilever 27 by the plunger 33 of connecting pin 31 magnet coil 32.

Below the overview of common escalator quoted Fig. 6 example in the past be illustrated.Staircase one stops, and the power supply of motor 9 just is cut off, and drg 10 carries out braking maneuver.This point is identical with in the past staircase.But in the device of the present invention, because magnet coil 32 outages, cantilever 27 disappears by plunger 33 suffered counter-clockwise swing power thereupon, and swing along clockwise direction under the effect of spring 30, the pawl 24a of an end of cantilever 27 and ratchet 24 engagement as a result, thus ratchet 24 is stopped operating.Though main shaft 4 will try hard to continue rotation because of inertia, because the effect of the friction force that produces between friction means 25 and flange 13 and the auxiliary plectane 17, main shaft 4 also is braked.

Opposite with above-mentioned situation, when staircase entered starting state, because magnet coil 32 is energized, the iron core 33 of plunger-type gave cantilever 27 with anti-clockwise oscillatory forces by pin 29, and an end of cantilever 27 and pawl 24a throw off as a result, and staircase can turn round.

As long as the friction force sum when the counter-clockwise swing power that magnet coil 32 produces can overcome the elastic force of spring 30 and remove engagement between cantilever 27 and the pawl 24a is just enough, so magnet coil 32 can adopt small coil.

In addition, be arranged on the damper 35 of cantilever 27 other ends, its effect is in order to prevent that the cantilever 27 and the pawl 24a of ratchet 24 from meshing suddenly at instantaneous time.For example, except the situation of chain drive-belt fracture, when the spindle brake and the motor brake 10 of drive sprocket are done the time spent simultaneously, it can make the brake action of motor brake 10 have precedence over the brake action of spindle brake.And it can also prevent to make cantilever 27 and pawl 24a percussion vibration cause out-of-gear phenomenon owing to the elastic force effect of spring 30.Certainly, under the situation of chain drive-belt 8 fractures, because the braking of motor brake 10 is inoperative, the just only effect of reliable spindle brake at this moment.

Like this, no matter be normal service stopping or because promptly stopping of taking place of safety device action, always spindle brake is moved.

In general, make two drgs, promptly the spindle brake of motor brake and drive sprocket moves simultaneously, and the stepping stopping distance of staircase is shortened, and the danger that causes that the passenger falls is arranged.Therefore, in the present invention, when escalator shuts down, because the effect of damper 35 can make spindle brake than motor brake 10 delayed actions.That is to say, when staircase stops, when cutting off motor power, make motor brake 10 actions, when staircase soon stops, just allowing spindle brake work.

Fig. 3 is an alternative embodiment of the invention.Here used a pair of ratchet 24, they clamp flange 13 by friction material 25.Among the figure 34 is attaching partss that a pair of ratchet 24 is connected as one.Cantilever 27 is same with last example, the pawl 24a engagement of an end and ratchet 24, and the other end is equipped with damper 35.

, under the situation of Fig. 1, the shape of the pawl 24a of ratchet 24 can only be braked the operating staircase that descends.If wish also to brake to the staircase of the operation of rising, can be as shown in Figure 4 with the shape of the pawl 24a of ratchet 24 and make ㄇ shape with the shape of its ingear cantilever 27 1 ends and get final product.

Also have, under the situation of Fig. 1, when staircase is descending the glancing impact that carries out in service, because the relation of an end of cantilever 27 and the relative position of pawl 24a, the engagement that begins to move with pawl 24a from cantilever 27 realizes in fact that promptly the required time of braking at every turn may be slightly variant, but as the function of the spindle brake operating staircase antiport that promptly prevents to rise, the staircase of the operation that descends is braked, the purpose that stair tread keeps can reach.

Fig. 5 represents the relation of the pawl 24a and the cantilever 27 of ratchet 24.For the antagonistic force minimum that when engagement produced, should be that pin 29 is arranged on the excircle tangent line t of the ratchet 24 that draws from the tip of engaged claw 24a with the fulcrum of cantilever 27.In addition, when staircase started, in order to make the engagement of cantilever 27 swing disengagings and pawl 24a, the angle theta that should make pawl 24a and normal n was greater than 0 °.But, can not throw off in order to make cantilever 27 and the engagement of pawl 24a at glancing impact, must make tan θ＜μ.Here μ is the friction coefficient between pawl 24a and the cantilever 27.

As mentioned above, in the spindle brake of the present invention, be equipped with owing to the effect of elastomeric element and the cantilever of ratchet engaged are leaned in the outage of magnet coil, be equipped with at the other end of above-mentioned cantilever and prevent that cantilever is by the damper of the instantaneous driving of elastomeric element, no matter thereby be normal service stopping or owing to promptly stopping that safety device action causes, when escalator stops, can making the spindle brake action, and spindle brake is than motor brake delayed action.Thereby eliminated owing to motor brake and spindle brake move simultaneously and make staircase sharply stop the danger that the passenger is caused, obtained the effect that improves safety.

Below accompanying drawing is done simple declaration.Fig. 1 is the lateral plan of escalator spindle braking system-embodiment of the present invention.Fig. 2 is the section-drawing along II among Fig. 1-II line.Fig. 3 is the another embodiment of the present invention that is equivalent to Fig. 2.Other planted the lateral plan of ratchet and cantilever to Fig. 4 for further embodiment of this invention adopts.Fig. 5 is the enlarged drawing of the position relation of ratchet pawl and cantilever in the presentation graphs 1.Fig. 6 is the lateral plan of escalator in the past.Fig. 7 is the lateral plan of the spindle braking system of staircase in the past.

Claims

1, a kind of spindle braking system of escalator, comprise in order to coiling be equipped with the pedal conveyer chain of stair tread drive sprocket and driven sprocket, be contained in ratchet on the above-mentioned drive sprocket main shaft, make cantilever that the one end is meshed with this ratchet, make cantilever along the magnet coil of removing the swing of ingear direction by the elastic force of elastomeric element, it is characterized in that: be provided with at the other end of described cantilever and prevent cantilever instantaneous driven damper under the elastomeric element effect.