CN2243492Y

CN2243492Y - Falling-down preventing device of wholly lifting scaffold

Info

Publication number: CN2243492Y
Application number: CN 94224590
Authority: CN
Inventors: 曾绍强; 胡克诚
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-30
Filing date: 1994-07-30
Publication date: 1996-12-25
Anticipated expiration: 2004-07-30

Abstract

The utility model relates to a safety device for preventing an integrated lifting scaffold from falling when the integrated lifting scaffold descends in the building construction. The structures of the integrated lifting scaffold are not changed; an adjustable length hanger rod is added on a hanger frame of the integrated lifting scaffold; the upper end of the adjustable length hanger rod uses a chain to wind the semiperimeter of the chain wheel, and then the chain is pendulous; the adjustable length hanger rod is provided with a balance weight block; a ratchet wheel and a one-level accelerated gearwheel are arranged on a chain wheel spindle, after three-level acceleration, an eccentric wheel is driven to rotate, the pawl throws out of mesh at this time, and the scaffold descends normally. When the falling situation of the scaffold occurs, the falling speed is increased and is faster than the descending speed, an eccentric block hits a thimble, the pawl is released to clamp the ratchet wheel to stop the scaffold from falling, and thus the utility model is a safety device.

Description

Integral hoisting scaffold descends and prevents Falling device down

The utility model relates to the safety device that prevents down Falling when a kind of integral hoisting scaffold descends.

Known integral hoisting scaffold does not still have the safety device that prevents down Falling when descending at present, the anti-Falling device down of Chinese patent integral hoisting scaffold, patent No. 93224078.X can only do integral hoisting scaffold and prevent Falling down when promoting, and can not prevent Falling down when descending.

The purpose of this utility model is to solve integral hoisting scaffold to prevent the safety device of Falling down when doing whole decline, makes the integral hoisting scaffold smooth safety of constructing.

The purpose of this utility model is achieved in that the original device of integral hoisting scaffold does not all change, only on the suspension bracket of scaffold bottom, install the suspension rod of an adjustable length additional, its lower end and suspension bracket are fixed, chain is equipped with in the suspension rod upper end, sagging and hang with a balancing weight by being fixed in sprocket wheel on the skin, when scaffold descends, suspension bracket is held the adjustable-length suspension rod and is descended, chain also descends, make sprocket wheel do anticlockwise rotation, and drive and the fixing anticlockwise rotation of ratchet of sprocket coaxiality, this moment, ratchet left, quicken gear wheel through the one-level of sprocket coaxiality and do three grades of spur gears acceleration, make the eccentric wheel that is fixed with two eccentric blocks do the normal speed rotation, the grab scaffold that can not collide thimble release ratchet because of the not enough eccentric block of centrifugal force normally descends, when the hoisting scaffold part is damaged, Falling under the scaffold, exceed normal decrease speed, eccentric wheel speeds the speed rotation, centrifugal force makes two eccentric block collision thimbles, by link rod, discharge ratchet, block ratchet anticlockwise rotation and prevent Falling under the scaffold.

Owing to adopt such scheme, can make integral hoisting scaffold when doing whole decline, this safety device be arranged, also can take off one-level and quicken gear wheel and accelerating gear was lost efficacy and the safety device that prevents down Falling when promoting as integral hoisting scaffold.

Below in conjunction with drawings and Examples the utility model is further specified:

Fig. 1 is the utility model general assembly side elevational view.

Fig. 2 is the sprocket wheel side elevational view.

Fig. 3 is the ratchet side elevational view.

Fig. 4 is the sprocket wheel front elevation view.

Fig. 5 is eccentric block normal condition position of rotation figure.

Fig. 6 is eccentric block position of rotation figure under centrifugal action.

Fig. 7 is a sectional drawing.

In Fig. 1, hoisting scaffold (1), lifting beam (2), elevator (3), suspension bracket (4), lifting beam pull bar (5) is the integral-scaffold part, when integral hoisting scaffold was done whole decline, scaffold (1) descended, and adjustable-length suspension rod (6) also descends because of the lower end is fixed on the suspension bracket (4), adjustable-length suspension rod (6) upper end is chain (7) fixedly, (7) hang with balancing weight (9) around the sagging tail end of sprocket wheel (8) half cycle, when adjustable-length suspension rod (6) descends, hold chain (7) and descend, balancing weight (9) rises, drive sprocket wheel (8) anticlockwise rotation, be integral hoisting scaffold decline normal condition, chain pulley seat (10), be fixed on the shear wall (12) with load-bearing bolt through walls (11), arrow is for descending.

In Fig. 2, chain (7), sprocket wheel (8), sprocket shaft (13), key (14) is installed on the chain pulley seat (10), and hole (15) are fixed on the shear wall (12) through load-bearing bolt through walls (11).

In Fig. 7, sprocket wheel (8), ratchet (16), one-level is quickened gear wheel (17) totally one sprocket shaft (13), one-level is quickened gear wheel (17) key (18), axle head cover plate (19), screw (20) is installed on the sprocket shaft (13), secondary quickens gear wheel (21) and is installed in axle (23) middle part with key (22), axle (23) one end mills have one-level to quicken pinion and one-level is quickened gear wheel (17) engagement, axle (23) ball bearing (24) (25) location and installation, and with bearing cover (26) sealing, secondary quickens pinion (27) and is installed in axle (29) middle part with key (28), and eccentric wheel (30) is installed on spool (29) with key (31), axle (29) uses ball bearing (32) (33) location and installation on accelerating gear seat (34), there is bearing cover (35) axle (29) end, and eccentric wheel (30) uses key (36) that two eccentric shafts (37) are installed up and down, and eccentric block (38) is installed on the eccentric shaft (37), sprocket shaft (13) is installed on the chain pulley seat (10) movingly, is located by two spring collars (39).

In Fig. 3, ratchet (16) and sprocket wheel (8) coaxial (13), ratchet (40), be installed in movingly on the pawl axis (41), pawl axis (41) is installed on the support (10) with sprocket shaft (13), ratchet (40) has a handle (42), plate fixed handle (42) ratchet (40) promptly breaks away from engagement with ratchet (16) and is hooked by connecting rod hook (43), connecting rod hook (43) top uses axle (44) location and installation on support (10), transverse link (45) right-hand member and thimble link rod (46) link, left end and connecting rod hook (43) link, and on the axle (29) eccentric wheel (30) are installed, and two eccentric blocks (38) are installed on the eccentric wheel (30).

In Fig. 5, on the axle (29) eccentric wheel (30) is installed, two eccentric shafts (37) are installed on the eccentric wheel (30), eccentric block (38) is installed on the eccentric shaft (37), when centrifugal force is not enough, eccentric block (38) rotational trajectory can not collide thimble (48), and the position of being everlasting of thimble (48) is kept by stage clip (47), is fixed on the eccentric wheel shell (49) of thimble (46).

In Fig. 6, when lift portion has parts damages, Falling under the scaffold, following Falling velocity ratio is faster than decrease speed, promptly produce enough centrifugal force, eccentric block (38) touch eccentric wheel shell (49) rotation because of centrifugal action, passing through thimble (48) when locating, collision thimble (48) is to outer displacement, make thimble link rod (46) displacement, affect transverse brace (45), make link rod hook (43) put and break off relations to the right, ratchet (40) is fallen into ratchet (16) and is made ratchet (16) anticlockwise rotation not prevent scaffold (1) Falling down.

In Fig. 4, support (10) is fixed on the shear wall (12) with load-bearing bolt through walls (11) through hole (15), sprocket wheel (8), ratchet (16), one-level quicken gear wheel (17) sprocket shaft (13) altogether, accelerating gear seat (34), thimble (48), transverse brace (45), axle (44), connecting rod hook (43) is formed the unhook link rod.

Owing to adopted such scheme, can reach automatically and prevent on time integral hoisting scaffold when descending, take place under the Falling accident, simple in structure, without electric energy.

The utility model must be entrusted the processing of machining factory, consigns to the unit in charge of construction that uses integral hoisting scaffold and adopts.

Claims

1, a kind of integral hoisting scaffold descends and prevents Falling device down, by the adjustable length suspension rod, chain, sprocket wheel, ratchet, ratchet, three grades of accelerating gears, eccentric wheel, eccentric block, thimble, unhook link rod critical piece is formed, it is characterized in that: adjustable-length suspension rod lower end is fixed on the integral hoisting scaffold suspension bracket, the upper end is chain fixedly, chain is sagging behind the sprocket wheel half cycle, the chain tail end hangs with balancing weight, ratchet, one-level acceleration gear wheel and sprocket wheel are coaxial, be installed on the chain pulley seat, one-level quickens gear wheel and one-level is quickened pinion, secondary quickens gear wheel and one-level acceleration pinion is coaxial, secondary quickens gear wheel and three grades of acceleration pinion, three grades of acceleration pinions and eccentric wheel are coaxial, two eccentric blocks are installed on the eccentric wheel, be installed on the accelerating gear seat, centrifugal force was not enough when scaffold descended, and eccentric block can not collide thimble, is normal decline, under the scaffold during Falling, speed up eccentric block collision thimble, the displacement of thimble link rod, affect transverse brace, the link rod hook is put to the right and is broken off relations, and ratchet engaged is fallen in ratchet release, prevents ratchet anticlockwise not rotate and Falling generation under preventing.

2, the anti-Falling device down of integral hoisting scaffold decline as claimed in claim 1, it is characterized in that: under the scaffold during Falling, the total weight of scaffold all pass through adjustable-length suspension rod, chain, sprocket wheel through chain pulley seat load-bearing bolt bearing through walls on shear wall, scaffold stops down Falling.