CN1211663A - Anti-break chain protector for electric roll-up door mechanism - Google Patents

Abstract

A protector for electric door-rolling machine is a brake unit acting when chain is broken off. Its slide contact plate directly acts on inside of chain in the door-rolling machine. When the chain is disconnected, the slide contact plate moves downward under the action of gravity and spring to release braking jaw to jam the bigger chain wheel, preventing the roll door from being slided down. Its advantage is quick stopping action.

Description

A kind of anti-break chain protector for electric roll-up door mechanism

Innovation and creation relate to a kind of chain rupture stop device of door-rolling machine.Be used to prevent to avoid door-rolling machine under load condition, just in case chain rupture takes place, its door sheet of rolling has the danger of rapid downslide.More particularly, be a kind of anti-break chain protector that is arranged between door-rolling machine and the hinge wheel axis.

The anti-breaking protective device of door-rolling machine of existing import is to be acted on topped the hinge wheel outside of chain by lock pawl, breaks away from the stop whether hinge wheel implements sprocket wheel by detecting chain.With reference to Fig. 4, during the door-rolling machine operate as normal because the isolation of chain, lock pawl can only be on chain surface jitter; In case generation chain rupture, door-plate descend rapidly under the deadweight effect, make the hinge wheel quick rotation, when hinge wheel with chain roll when breaking away from the lock pawl position, be stopped to detain spring action under and reach stop to sprocket.This anti-chain rupture protective device; its average stop time is longer; when taking place chain rupture to stop; the average distance that rolling door glides is bigger; turning to of position x that middle as shown chain disconnects and hinge wheel; determine hinge wheel must cover behind this segment distance of cut-off point x to 1-1 lock pawl and could obtain stop; but this moment rolling door about 1-2 rice that descended; simultaneously because the rolling door decrease speed is increasing; the momentum that rolling door descends is also more and more big; this brings great threat not only can for people's safety, also can damage lock pawl and door-rolling machine.

The invention is the door-rolling machine anti-break chain protector that will propose another kind of form of structure, and its test format is different fully with existing protector, is to obtain the chain rupture signal from the chain inboard, has signal and obtains fast characteristics.

This anti-break chain protector can produce stopping function rapidly, no matter and the position of chain breakpoint when chain rupture takes place.

Therefore, the purpose of the invention is to propose a kind of anti-cut-off protector that can implement stopping function when chain rupture takes place rapidly.

Its purpose is realized by following scheme.

This protector comprises:

One base;

A slip contact, activity are fixed on the described base, and this slip contact can move freely in vertical direction;

One axle is between door-rolling machine and hinge wheel axis;

One lock pawl is loaded on the described axle;

One tension spring is placed on the described axle, and the one end is buckled on the described slip contact, and the other end then is buckled on the described lock pawl;

One baffle plate is fixed on the described slip contact, is used to block the lock pawl that is subjected to the tension spring effect that rotation trend is arranged;

One touches roller, is fixed on the described slip contact, acts on the chain inboard between door-rolling machine and the hinge wheel.

Adopt the door-rolling machine of this anti-break chain protector; because the effect of gravity; the shake-up roller remains with chain and contacts; when chain generation chain rupture, no matter where breakpoint betides, and chain all descends tunnel rapidly; break away from the shake-up roller; the slip contact is descended, discharge lock pawl, thereby reach the rotation of blocking sprocket wheel.

The anti-break chain protector of the invention; whether system contacts with chain by detection shake-up roller and implements stop; in case and chain generation chain rupture; then break away from the shake-up roller immediately; shake-up roller and slip contact are descended as early as possible; baffle plate discharges lock pawl rapidly; make lock pawl block sprocket wheel; it has stop characteristics fast; can control the door-plate tunnel under continuing under the deadweight effect that is connected with hinge wheel effectively; play preventing door-rolling machine when chain rupture, the quick decline of rolling door might cause injures and deaths or damage the danger generation of door-rolling machine, and the safety performance of anti-break chain protector is further improved.

Fig. 1 is a kind of concrete enforcement structure chart of the invention.

Fig. 2 is the upward view of Fig. 1.

Fig. 3 is a kind of user mode reference diagram of the invention.

Fig. 4 is a kind of structural representation of existing anti-break chain protector.

Below in conjunction with accompanying drawing the invention is described in further detail:

With reference to Fig. 1; the anti-break chain protector for electric roll-up door mechanism of Fig. 2 present embodiment comprises base 2; slip contact 3; baffle plate 4; touch roller 1; axle 7 and lock pawl 5 and tension spring 6; wherein; slip contact 3 passes through banking pin; spacing hole and base 2 formation activities are fixed; make the slip contact 3 can be in vertical direction; in certain limit, move freely; lock pawl 5 is loaded on axle 7; tension spring 6 also is placed in axle 7; and an end of tension spring 6 is buckled in the projection of slip contact 3; the other end then is buckled in the projection of lock pawl 5; baffle plate 4 is fixed in base 2, is used to block owing to be subjected to the tension spring effect that the lock pawl 5 of the gesture of transferring toward is arranged, and touches roller 1 and is fixed on the base 2.With reference to Fig. 3; anti-break chain protector is installed in the middle of door-rolling machine and the hinge wheel; door-rolling machine and hinge wheel are by a chain drive; touching roller 1 directly is pressed on the inboard of chain; during normal the operation; because the restriction of chain touches roller and only does to roll and can not sink, when chain any point disconnects; chain just can descend tunnel at once; the slip contact is together with touching roller under self gravitation and the effect of tension spring elastic force, no longer is subjected to the chain restriction and descends, at this moment; baffle plate 4 also descends simultaneously; originally the lock pawl that was stuck on the baffle plate 4 discharges owing to baffle plate descends, and turns to hinge wheel rapidly under the tension spring effect, blocks sprocket wheel rapidly thereby reach.

Claims (1)

1, a kind of anti-break chain protector for electric roll-up door mechanism is characterized in that, it comprises:

One base;

A slip contact, activity are fixed on the described base, constitute the relation that this slip contact can move freely in vertical direction with described base;

One axle is used for fixing between door-rolling machine and hinge wheel axis;

One lock pawl is loaded on the described axle;

One tension spring is placed on the described axle, and the one end is buckled on the described slip contact, and the other end is buckled on the described lock pawl;

One baffle plate is fixed on the described slip contact, is used to block the lock pawl that is subjected to the tension spring effect that rotation trend is arranged;

One touches roller, is fixed on the described slip contact, is used to act on the chain inboard between door-rolling machine and the hinge wheel.

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