CN1280950A - Braking device for cage of lifter - Google Patents

Abstract

A falling-preventing unit for the cage of a lift features that when the lifting cable of the cage is broken, two actions are immediately taken within zero sec: the internal slant wedges of safety pliers are raised up to clamp the track for preventing cage from falling down and its left and right arms are simultaneously opened to put on the cross-bar of lifting frame to prevent case from falling down further. Its advantages include quick action, filling distance less than 25 mm, no misoperation and no vibration of cage.

Description

Anti-drop device for lifting cage of elevator

It is disrumpent feelings and device that can not fall belongs to mechanical safety production technique to the present invention relates to a kind of heavy straight transportation cage of elevator invar rope that is in operation.

At present, known and become commercial construction hoist falling-proof dropping control device to have 2 kinds, a kind of is eccentric safety tongs, comes into the market only 2 years, because misoperation is many, is just refused by unit in charge of construction.Second kind is the wedge-type safety tongs that came out last year, disrumpent feelings when steel cable, and when promoting cage generation acceleration/accel whereabouts, wedge just vises guide rail, promotes cage and falls about 150 millimeter of distance, the big and rare misoperation of seismaesthesia.

The purpose of this invention is to provide a kind of (on the basis of my 96240537 patents) through on-the-spot experiment more than 2 years, and improved construction hoist falling-proof dropping control device.It can promote the action in zero disrumpent feelings second of cage steel cable, promoting cage does not produce before the acceleration of falling body, the safety tongs wedge has vised guide rail, the lifting cage is stopped, be less than 25 millimeters apart from drop, because anti-fall Mu speed is fast, there is not the seismaesthesia that negative acceleration produces so promote cage, action is fast and do not have a misoperation.

The object of the present invention is achieved like this: the gin wheel that promotes the cage top is connected with lifting cage entablatrance by the lineal bar of the lifting of fluting, shock mount between gin wheel and the entablatrance, gin wheel is connected by the oblique tie-rod of slotting with the supporting base at entablatrance two ends, rotating shaft is housed in the supporting base, rotating shaft two flat end Extension support seat axis holes are made no key with the oblique tie-rod elongated slot of fluting and are connected, the bar of encorbelmenting is housed in the middle of the rotating shaft, the outer downside of supporting base respectively is equipped with safety tongs, wedge top suspension rod is connected with the bar of encorbelmenting in the safety tongs, the wedge mouth stretches into and surrounds the crane guide rail outside, and the building hoist that the wedge rear side is formed a snap by a groove parallel with the inclined-plane promotes cage falling proof device train of mechanism.

The concrete structure of invention is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is that the present invention is at the site plan that promotes on the cage.

Fig. 2 is structure of the present invention and fundamental diagram.

Fig. 3 be safety tongs of the present invention just, left view.The A that is Fig. 2 is to view.

Among Fig. 1,1. oblique tie-rod 4. springs 5. of lineal bar 2. gin wheels of the lifting of slotting 3. flutings promote cage entablatrances 6. supporting bases 7. safety tongss 8. guide rails 9. and promote cages

In Fig. 1, the lineal bar (1) of the lifting of fluting, gin wheel (2), the oblique tie-rod (3) of fluting, spring ⑷, supporting base (6) are installed in respectively with safety tongs (7) and promote crossbeam (5) top and two ends, the left and right sides on the cage, promote cage (9) and move up and down along guide rail (8).

Among Fig. 2,1. oblique tie-rod 12. bolts 13. supporting bases 14. rotating shafts 15. of lineal bar 4. jack shafts of the lifting of steel cable 2. bolts 3. fluting 5. springs 6. pulleys 7. pulley clamping plate 8. bolts 9. sheave shafts 10. hinge bolts 11. flutings bar 16. wedge suspension rods 17. elevator guide railses 18. safety tongss 19. bolts 20. bolts 21. of encorbelmenting promote the gin wheel 24. position blocks 25. bolts 26. spring fixers of oblique tie-rod 23. full state of the fluting of cage entablatrances 22. full state.

In Fig. 2, pulley (6), front and back 2 pulley clamping plate (7), bolt (8), connect into gin wheel with jack shaft (4), 2 are clipped in the middle gin wheel before and after the lineal bar of the lifting of fluting, the oblique tie-rod (11) of fluting up and down 2 sections connect by bolt (12), its upper end is connected with the pulley clamping plate by hinge bolt (10), its underpart elongated slot is made no key with rotating shaft (14) two flat ends of Extension support seat (13) axis hole and is connected, supporting base is connected with lifting cage entablatrance (21) by bolt (20), safety tongs (18) is connected with lifting cage entablatrance two ends by bolt (19), wedge suspension rod (16) is connected with the bar of encorbelmenting (15) in the safety tongs, the bar other end of encorbelmenting is connected with the rotating shaft stage casing, and spring 5. upper end is enclosed within the jack shaft termination, the lower end is enclosed within spring fixer (26) termination, and position block (24) is contained on the pulley clamping plate, prop up the lineal bar avris of lifting of fluting, make gin wheel when work, keep normally not rocking.When steel cable (1) work done, mention gin wheel and open horizontal oblique tie-rod, back-moving spring.Steel cable is in a single day disrumpent feelings, spring is out of balance, in zero second time, quickly the leave behind oblique tie-rod upper end of gin wheel and fluting, its lower end elongated slot is the center with the supporting base rotating shaft, and makes it rotation, so just produce 2 actions continuously: 1. originally favoured the bar perk of encorbelmenting of supporting base vertical center line after the supporting base rotating shaft rotation, and mention wedge in the safety tongs, vise crane guide rail (17), the lifting cage that order loses wire rope traction stops to descend immediately; 2. the oblique tie-rod upper end of fluting falls back (23) with gin wheel, become square edge (22) by a hypotenuse, the part that it is longer is gone to overhanging along supporting base rotating shaft two flat ends through elongated slot, and rest on the cross bar of crane, play fall arrest effect for the second time.

Among Fig. 3,1. wedge suspension rod 2. wedges 3. safety blocks 4. bar 5. crane guide rails 6. wedge loose slots 7. bolts of encorbelmenting.

In Fig. 3, wedge (2) is contained in the interior left and right sides of peace golden caliper (3), and the bar ⑷ that encorbelments is connected with wedge suspension rod (1).When the bar of encorbelmenting was mentioned into horizontality, wedge was also and then mentioned, and rose along wedge loose slot and the inboard skew wall of safety tongs, so vise the crane guide rail (5) by its center.Realize first fall arrest action.

Claims (2)

1, a kind of building hoist promotes the cage falling proof device, it is characterized in that: the gin wheel that promotes the cage top is connected with lifting cage entablatrance by the lineal bar of the lifting of fluting, shock mount between gin wheel and the entablatrance, gin wheel is connected by the oblique tie-rod of slotting with the supporting base at entablatrance two ends, rotating shaft is housed in the supporting base, rotating shaft two flat end Extension support seat axis holes are made no key with the oblique tie-rod elongated slot of fluting and are connected, the bar of encorbelmenting is housed in the middle of the rotating shaft, the outer downside of supporting base respectively is equipped with safety tongs, wedge top suspension rod is connected with the bar of encorbelmenting in the safety tongs, and the wedge mouth stretches into doubling-up and lives the crane guide rail outside.

2, anti-drop device for lifting cage of elevator according to claim 1 is characterized in that: safety tongs wedge rear side has a groove parallel with the inclined-plane.

Images