Title: Scaffolding for supporting lifting working bridges and platforms

What is claimed is:

1. A disassemblable scaffolding for supporting lifting working bridges and platforms comprising uprights or posts and at least one lift bridge or platform which can be let ascend or descend along said posts, each bridge including at least two carrying frameworks and each platform including one carrying framework, each framework supporting a motor unit and a braking unit, said motor units serving to move the respective bridge or the platform up and down along a respective post and the braking units serving to the locking thereof at any desired level, characterized by the fact that the scaffolding is constituted of modular elements which can be assembled to each other by means of releasable joint means, each post (1) having a lattice structure and being formed; by a base section (7) made integral with a first base frame (12) mounted on wheels (13), and this first base frame (12) being mounted on and connected, in disasseblable manner, to a wider second frame (14) provided with other wheels (15) and with feet (15) of adjustable height, so that each post (1) and the parts connected thereto and supported thereby can selectively let slide along the ground or respectively rest stably thereon; by a plurality of other post sections (7a) to be mounted in superimposed relationship on the base section (7a), said post seconds (7, 7a) being triangular in horizontal cross section and including a vertical corner bar 9a and two tubular corner vertical rods (9) forming in their assembled condition vertical guide rails for engaging sliding guide wheels (36) supported by respective frameworks (31), forming a part of the carrying structure of each bridge (2) or platform (3), this carrying structure also comprising modular lattice carrying elements (46, 47a, 47b) connectable to each other in longitudinal alignment, each carrying structure supporting a footplane (148), as well as a front (149) and a rear parapet (150), each parapet (149 or 150) being constituted of frames (56), the frames (56) forming each front parapet (149) being connected to the carrying elements (46, 47a, 47b and 31) by means of joints comprising tubular seats designed to receive the lower ends of the posts of the frames (56), and arranged in bodies (57) fixed to the carrying structure close upper longitudinal front edges of the elements (46, 47a, 47b, 31) while the frames (56) forming the parapet (150) designed to face the building is connected to the elements (46, 47a, 47b, 31) by joints comprising tubular seats arranged into bodies (57a) connected to the opposite upper longitudinal edges of said elements with the interposition of telescopic connections so as to allow to vary the distance of each parapets (150) from the building and as result thereof, the width of each bridge (3) or platform (2), each post element (7a) comprising a device for contemporaneansly inserting surety locking pins (17 and 29) through the female and male joint members (8 and 8a) connecting the post menbers (7 and 7a).

2. A scaffolding according to claim 1, wherein each post (1) is composed of a base section (7) and of other post sections (7a), each post section (7, 7a) comprising a lattice structure including a pair of vertical corner tubular rod lenghts (9) positioned parallelely to the vertical centre plane of the bridge and facing the building surface, while the bar (9a) is positioned on the front side of each post (1) and is made integral with a longitudinal rack section (6), all the rack sections 6 of a post (1) forming a vertical continuous rack into which the driving toothed wheel (110) is engaged which is actuated by the motor unit (4) mounted on the support framework (31) of a bridge (2) or platform (3) associated with the posst (1), the rods (9, 9a) of each post length being connected to each other by horizontal or diagonal bracing stiffening bars (10 and 10a), each framework (31) comprising pairs of stirrups (60) for its connection with the adjacent lattice elements (46, 47a, 47b), said stirrups extending out of the end sides of each framework (31).

3. A scaffolding according to claim 1, wherein each post section (7a) comprises a mechanism for a surety locking of the connections of the rods (9, 9a) composing each post (1), said mechanism being mounted in each post section (7a) at the level of the female end joint members (8a) and consists of a triangular horizontal plate (21) mounted at the center of each post section (7a) and made integral with a manually operable control bar (22) for causing this plate (21) to rotate about a vertical pivot central axis, near two of the angles of said plate (21) being pivotally connected the ends of two horizontal connecting rods (19) causing the reciprocation of two respective pins (17), each reciprocating into a sleve (9b) extending towards said center axis from the end portion of each rod (9), each pin (17) being designed to enter through aligned holes (63, 63a) arranged in the male and female joints members (8, 8a) while at the remaining angle of the plate (21) a device is provided, which through a pin and slot connection (20a, 25) and a lever (23a, 23b) connected to a pivot pin (24), actuates a pin (29) which enters the aligned holes (63 63a) arranged through the male and female joint members (8, 8a) of the adjacent vertical rod sections thus the rotation of the control arm (22) causes the rotation about the center axis of the plate (21) and the contemporaneous, displacing outwardly of the locking pins (17 and 9), thus locking the joints (8, 8a) provided at the ends of the corner rods and bars (9, 9a) of each post (1).

4. A scaffolding according to claim 1, wherein each braking unit (5) includes a toothed brake shoe (11) supported by an angled lever (41a, 41b) pivotally supported by the framework (31), said shoe (11) being put under the effect of a strong spring (40), tending to press the shoe (11) to engage the rack (6) in a mutual locking condition, said shoe (11) being moved away from said engagement position by means of an electromagnet (45), the armature of which causes the lever (41a, 41b) to be moved in the opposite direction with respect of that of the operative action of said spring (40).

5. A scaffolding according to claim (1), wherein the carrying structure of each bridge (2) or platform (3) is constituted of modular lattice elements comprising:frameworks or frameworks (31); end elements (46) having a upper horizontal frame supported at its outer end by a cantilever lattice frame and in the remaining portion by a lattice frame, triangular in vertical cross section; intermediate modular carrying elements of simple (47a), or double length (47a), each supporting a upper horizontal frame and triangular in vertical cross section, as the second portion of the elements (46), each of the lattice elements (46, 47a, 47b) having at one of their ends male joint connections (55a), and at the other end the other female joint connections (55b), the joints (55a, 55b) enabling the elements (46, 47a, 47,) to be connected to each other in aligned relationship.

6. A scaffolding according to claim 1, wherein each bridge (2) or platform (3) has a front and a rear parapet (149 and 150), constituted of modular elements, each comprising an inverted U shaped tubular frame (56) having at least one longitudinal stiffening bar, between the vertical posts of each frame (56) being mounted a protection wired band (59), the lower ends of the posts of said frame (56) being received into joint seats which are arranged in joint bodies (57) which are fixed to the front upper longitudinal sides of the carrying elements (46, 47, 47a and 31), while at the opposite side, the joint bodies (57a) are supported by the elements (46, 47a, 47b and 31) through telescopical connection means (58 and 49) having an adjustable length in the direction perpendicular to the longitudinal center axis of each bridge (2) or platform (3), on the outer longitudinal side of the end bodies 57a of each elements 46, 47a, 47b a bored braked 65 projects provided for the connection with a stirrup 60a of the parapet elements 56 of a framework 31 or of the other elements (46, 47a, 47b).


Other info:


Inventors: Pieri, Antonio (Montebelluna, IT)

Application Number: 06/150975
Filing Date: 1980-05-19
Publication_date: 1981-10-06
Assignee: Piat, Impalcature Automatiche S.

Primary Class(es): 182/69.600 182/146, 182/131, 182/148
Other Classes: E04G1/20; E04G1/24; E04G1/00; E04G1/18; E04G7/20; E04G1/20
US Patent Ref:

2904126	September, 1959	Meng	182/148	Multiplatform scaffolds
3197178	July, 1965	Nietz	182/63	Apparatus for installing continuous rows of fluorescent lighting fixtures
3318414	May, 1967	Meek	182/146	Scaffolding
3352380	November, 1967	Barney	182/148	Scaffold with catwalks for penetrating tree foliage
3438460	April, 1969	Solari	182/146	SCAFFOLD WITH ELEVATABLE SECTION
3516512	June, 1970	Kupke	182/141	MOBILE SCAFFOLD
3548970	December, 1970	Hutchens	182/141	SCAFFOLDING AND MATERIAL HANDLING SYSTEM
3937301	February, 1976	Bertail	182/141	Trailer having a self-lifting platform
3946836	March, 1976	Maack	182/141	Elevator system having co-moving and short-length annular-belt for suspending and propelling the carriage

Other Refs: AT237875

January, 1965

182/141

Primary Examiner: Machado, Reinaldo P.
Assistant Examiner:
Attorney: Staas & Halsey