SU111008A1 - Form for making concrete and reinforced concrete products of box section - Google Patents

Description

Forms for making upright concrete and reinforced concrete elements of box-shaped, tubular, etc. sections, which are removed entirely from the formed element by lifting, are known, and the machine tools slide along the surface of the concrete.

The disadvantage of such forms is that when they are raised, thin-walled newly formed elements may be damaged.

In the described form, this drawback is eliminated by the fact that at the beginning of the ascent, the outer walls of the form automatically move apart, so that upon further ascent they do not touch the concrete;).

FIG. I shows a side view of the outer shape box; in fig. 2 - view of boxes in the plan; in fig. 3 - side view; in fig. 4 is a detail of the device for moving the walls of the mold during lifting, the section along AA in FIG. 2Form consists of three parts: an open self-opening box, an internal rigid core (the outline of the core is shown in Fig. 2 in plan) and a pyramid-shaped cap (not shown) that fits over the core and is designed to direct the flow of concrete mix between outer and inner walls of the form.

The outer box includes a rigid non-folding frame / in which walls 3, which serve as the external formwork of the concrete element, are suspended on the arms-suspensions 2. Suspension arms 2 connectors with ra.moi / and walls 3 pivotally.

In addition, each of the walls 5 is connected by the same pendants 2 to a second frame 4, not directly connected to the frame /.

Vibrators (not shown in the figure) can be mounted on the walls of the outer box to compact the concrete mix.

No. 111008

The action of the form is as follows.

The outer box of the mold and the core, the position of which is fixed by means of sleeves, which are worn when assembling the mold on the guide rods 5, pr1gP (replenished to the frame / outer box, is installed on the roving platform.

After the concrete has been laid and compacted, the outer duct is lifted with a crane or other lifting mechanism by the hinges on the frame. Initially, the frame 4 rises, carrying along the walls 5, which then depart from the surface of the concrete. After the walls 5 have been fully opened, the supporting frame / also begins to rise.

When assembling the form, the process proceeds in the reverse order. When the box is lowered, the base of the supporting frame 1 will first touch. The frame 4 will continue to lower, moving the walls 3 with the aid of the suspension arms 2 to the design position.

Due to the fact that the suspension arms 2 have the same length and are arranged in two legs in height, the walls 3 always remain upright.

Subject invention

A form for making concrete and reinforced concrete products of box section in vertical position, consisting of rigid unchangeable ser.dechnik and external sliding walls, characterized in that, in order to automatically move apart the walls when the form is raised and they come closer when lowering and setting the form on the place of manufacture of products and the possibility of forming thin-walled box-like elements, etc., of a section, two rigid frames are used, one above the other and having the possibility of moving the frames relative to each other, to the walls of the form are attached by means of rods pivotally connected to both the frames and the walls, and the rods connecting the machines to the lower frame are of the same length, parallel to each other and disposed in two lines in height, which ensures the verticality of the walls when they are moving.

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