JPS61126267A - Scaffold - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a scaffold comprising a work platform which can be raised and lowered parallel to the axis of the scaffold and whose distance from the axis of the scaffold can be adjusted, the work platform having an annular shape. or formed of a plurality of sector-shaped bodies arranged in an arc, which sectors can be raised and lowered together, and whose radial spacing from the scaffold axis is adjustable together; The scaffold is preferably provided with two liftable support rings arranged one above the other coaxially with respect to the scaffold axis, one of the two support rings having a plurality of support rings that can be pivoted in different radial planes. of the type in which support arms are pivotally mounted, and which carry at their free ends a generally annular or arcuate sector of the workbench.

PRIOR ART Scaffolding of this type is advantageously used, particularly in formwork civil engineering work, when conical and/or hollow-shaped structures have to be demolded, as disclosed in Auss) IJA Patent No. 373018. It is disclosed in the specification of No.

OBJECT OF THE INVENTION The object of the invention is to improve the scaffold of the type mentioned at the beginning,
It is an object of the present invention to provide a scaffold that is easy to assemble and allows the use of relatively light components when static load resistance is equal.

In order to achieve this object, the present invention provides that the support arms are pivoted to the lower support ring, and that the support arms advantageously have one in each case at the free end of the support arms. A support rope is engaged, which support rope is fixed to the upper support ring or is guided to the upper support ring via deflection rollers or the like, and the support rope is connected to the upper support ring. The support arm can be raised and lowered using the ring.

Embodiment In the configuration of the invention, the support rope can be a steel rope or a chain.

It is also provided in an advantageous embodiment of the invention that the support arm consists of two beams forming a square link, one of the two beams being adjustable in length, which is horizontal when the support arm is fully extended. be.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawing, a scaffold according to the invention is schematically shown, and as can be seen from the drawing, the erecting scaffold for installing or casting a substantially double-conical concrete wall 1 is advantageously constructed. It consists of a frame structure base 2 with three triangularly arranged vertical columns 3 and horizontal and diagonal steel. This frame structure base 2 is installed in the lowest part 1 of a concrete wall, pre-cast and concreted without the aid of scaffolding according to the invention.

Two support rings 5.6 are arranged on the frame structure base 2 so as to be able to be raised and lowered. Both support rings 5.6 are preferably reinforced in the form of a frame structure using stays (see the drawings). (omitted for clarity).A number of support arms 7 are pivotally connected to the lower support ring 6, which are pivotable in different radial planes. Only a few of the supporting arms 7 are shown. Each supporting arm 7 consists of two parallel beams 8, 9, one beam 8,
9 is a vertical beam 1o at the support ring 5 and a vertical beam 1 at the outer free end of the support arm 7;
Together with 1, it forms a quadrilateral link (parallelogram link). Due to this configuration, the support 12 of the sector plate of one workbench combined with the outer vertical beam 11 of the support arm 7 is always in an equally horizontal state, no matter what pivot position the support arm 7 occupies. is maintained.

The support arm 7 is pivoted at its free end to a support rope 15, which itself extends via a roller 14 provided in the upper support ring 5. When the support rope 15 is lengthened or shortened, the support arm 7 is raised or lowered like a breaker.

The roller 14 can be designed in the form of a winch, but it can also be designed simply as a deflection roller.
In the latter case, the support rope 15 is brought to a winch located at a suitable location via deflection rollers. The winch may, for example, be arranged directly at the shelving joint.

If the support arms 7 are simultaneously raised or lowered, the work platform consisting of a number of superimposed sector plates corresponding to the number of support arms 7 is pivoted outwards or inwards. When the support rings 5, 6 are moved together up and down along the framework tower 2, the work platform is raised or lowered in the vertical direction.

In the illustrated embodiment, the support rings 5, 6 are attached to the frame structure 1.
3 to each other.

The frame structure 13 is equipped with a known climbing device by means of which the unit consisting of the support ring 5.6 and the support arm 7 can be moved up and down along the framework tower 2. By a coordinated lifting and lowering of the support rings 5, 6 and a pivoting of the support arm 7, the work platform can be brought to the respective desired position in the formwork.

[Brief explanation of the drawing]

The drawing schematically shows an embodiment of a scaffold according to the invention. 1... Concrete wall, 2... Frame structure tower, 3.
・・Prop, cow・stay, 5, 6・・support ring,
7...Support arm, 8-11...Beam, 12...
- Support, 13... Frame structure, 14... Roller, 15... Support rope

Claims (1)

[Claims] 1. A scaffold equipped with a work platform that can be raised and lowered in parallel to the scaffold axis and whose distance from the scaffold axis can be adjusted, wherein the work platforms are arranged in a ring or an arc. of sectors, the sectors are movable together and the radial spacing of the sectors from the scaffold axis is adjustable together, and the movable scaffold is arranged one above the other. Two support rings (5, 6) which can be raised and lowered are provided, on one of which a plurality of support arms (7) which can be pivoted in different radial planes are pivotally connected. of the type in which the support arm (7) carries at its free end a generally annular or arc-shaped workbench sector, in which the support arm (7) pivots on the lower support ring (6). and each support arm (7) is engaged by a support rope (15), which is fixed to the upper support ring (5) or attached to or to the deflection roller. similar to the upper support ring (5);
A scaffolding characterized in that a support arm (7) can be raised and lowered using. 2. The support arm (7) consists of four beams (8, 9, 10, 11) forming a square link, one of the two beams being horizontal when the support arm (7) is fully extended. Scaffolding according to claim 1, wherein (9) is adjustable in length.