SU796338A1 - Sectional metal frame - Google Patents

Description

one

The invention relates to the construction and can be used in metal structures of the arched type of collapsible structures.

Known collapsible metal frame, including arches, girders and their attachment points to the lower arches and girders l.

The disadvantage of this collapsible metal frame is the complexity of its manufacture and installation, as well as the insufficient strength of the joints of the frame elements.

Closest to the proposed. is a collapsible metal frame comprising arches with upper and lower ones themselves, purlins and their attachment points to the upper arches themselves, made in the form of crates of profiles corresponding to the shape of the cross-section of the purlins, struts and their attachments to the purlins and lower by the arches itself. Each strut in the attachment points is connected to the girder and with the lower som hinged and made in the form of a profiled rod with a clamping device at the end 2.

The disadvantage of this frame is insufficient strength

connections of its elements, since, in it, the stability of arches is not ensured at large deflections of runs, in view of the fact that the rigid device does not withstand compressive loads. In addition, under heavy loads, a plug may be released in which it is installed.

The purpose of the invention is to increase the strength of the frame under parallel loads on the runs.

Claims (2)

This goal is achieved by the fact that in a collapsible metal frame that includes arches with upper and lower ones themselves, purlins attached to the upper arches of the arcs themselves by means of lodgements of profiles corresponding to the cross-sectional shape of the purlins, and struts attached to the purlins and to the lower along the arches themselves, the framework is provided with additional beams attached to the lower arches themselves by means of metal elements of profiles corresponding to the cross-sectional shape of the beams, and the struts are installed evenly throughout the length of the girders angles to each other and rigidly connected to the beams and girders. FIG. 1 shows an arched frame, general view; in fig. 2 section A-A in FIG. one; in fig. 3 section bb in fig. 2. Collapsible metal box contains arches 1 with upper 2 and lower 3 by themselves, purlins 4 with their attachment points to the upper ones by themselves 2 arches 1, made in the form of cradle 5 of profiles corresponding to the shape of the cross-section of purlins 4, struts b, beams 7, fixed in the arches 1 of the lodgements 8 mounted on the lower 3 arcs 1, made of profiles corresponding to the cross-sectional shape of the beams 7. The struts 6 are evenly mounted along the entire length of the girders 4 at an angle to each other and rigidly connected to beams 7 and progoy us 4, Collection th ka metal k'as mounted as follows. Runs 4 are connected to beams 7 by means of supports 6, which are installed uniformly along the entire length of runs 4 at an angle to each other and rigidly attached, for example by welding, to runs 4 and to ball KciM 7. After the arches 1 are installed, the purlins 4 are placed in the cradle 5, and the beams 7 in the cradle 8 and are fixed in them, for example using clamps 9. Thus, the assembly of the collapsible metal frame of the proposed construction is carried out more easily compared to the known construction, since it lacks tensioning devices that require careful adjustment of the tension. In addition, the proposed design of a collapsible metal frame allows to reduce heat loss to the environment, since, if necessary, the ceiling is attached to the underside of the beams. As a result, between the roof installed on the purlins and the ceiling forms an air gap with the air, reducing heat loss to the environment. Therefore, the proposed collapsible metal frame can be used in greenhouses. At the same time, the strength of the frame increases and, consequently, its reliability, since the load perceived by the runs is distributed evenly over them and is transmitted to the beams fixed in the cradles mounted on the lower arcs of the arches. Therefore, the collapsible metal frame of the proposed design can be used in areas with a large amount of precipitation, creating increased loads on the frame. Claims Collapsible metal frame, including arches with upper and lower ones themselves, purlins attached to upper noHCciM arches, with a lodgement of profiles corresponding to the cross-sectional shape of purlins, and struts attached to purlins and lower ones along the arches, characterized by the fact that, in order to increase the strength of the frame when the loads are applied to the girders, the frame is provided with additional beams attached to the lower ones by means of the lodgements of profiles corresponding to the shape. cross-section of the beams, and the struts are installed evenly along the entire length of the girders at an angle to each other and are rigidly connected to the balkets and the passageways. Sources of information taken into account during the examination 1.Stykovoy connection in the warehouse of mineral fertilizers for 1200 tons. Lightweight warehouse project. KB Minsk ovo (tsnoy factory, Minsk, 1974. 2. USSR author's certificate according to application no. 2593669 / 29-33,22.03.78 (prototype). n f.f tft Z ut.J