AU2012354257A1

AU2012354257A1 - System of single guides and sectional elevating doors for a low lintel

Info

Publication number: AU2012354257A1
Application number: AU2012354257A
Authority: AU
Inventors: Roman Viktorovich SMIRNOV; Lyudmila Viktorovna Vyatina
Original assignee: OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTYU DOORHAN 21 CENTURY
Current assignee: OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTYU "DOORHAN 21 CENTURY"
Priority date: 2011-12-19
Filing date: 2012-07-27
Publication date: 2014-06-12
Also published as: RU2477360C1; WO2013095185A1; CN104114797A; EA201301156A1; EP2703588A1; AU2012354257A8; EA022940B1; EP2703588A4

Abstract

The group of inventions relates to the field of construction and concerns design alternatives of overhead sectional elevating doors for covering apertures having a low lintel, and a system of single guides usable in said apertures. The system of guides for the sectional elevating doors consists of a pair of vertical guides combined with corner posts (called combined vertical guides below), which vertical guides are arranged along both sides of the aperture and are intended for attachment to the wall, each of which vertical guides constitutes a single long profile with a series of grooves and/or openings in the lower part thereof, and each being connected by means of a double offset of the guides to a corresponding double horizontal guide, each formed from a single long profile consisting of two wings of identical length and C-shaped cross section with guide surfaces, the upper of which is a guide for rollers of an upper panel of a door leaf, and the lower of which is a guide for rollers of panels of the door leaf, except for the very top one, wherein the double offset of the guides consists of two offsets. The technical result of the invention is a reduction in the dimensions and a reduction in the cost of an article.

Description

SYSTEM OF SINGLE GUIDES AND SECTIONAL ROLL-UP GATE FOR LOW LINTEL The group of inventions relates to the field of construction and concerns variants of design of a ceiling sectional roll-up gate as well as a system of guides used therein. The claimed designs of the gate may be used for spanning of apertures with low and very low lintel in residential buildings for the purpose of preventing unauthorized access into the building, provision of thermal insulation and sound-proofing of the premises. An interest in development of designs of a sectional roll-up gate for spanning apertures with a low (less than 150mm) and very low (less than 100mm) lintel arises in connection with people's longing for compact utility premises (garages) and wish to utilize the available volume of auxiliary premises up to the utmost efficiency, as well as in connection with growing popularity of standard modular ferroconcrete structures for construction of garages in European countries. Known (RU, patent No. 2203379 C2, E05D15/24, published on Sep 20, 2000) is a ceiling articulated gate for apertures with especially low height of lintel between upper edge of aperture subject to closing and ceiling zone bordering on it having door leaf comprising several panels articulated in sequence in direction of movement, which are moved by means of rollers placed on sides thereof comprising: first side guides comprising a vertical section and a horizontal section with an arc-shaped joint in-between; second guides having a horizontal part and an end part adjacent to the end of the horizontal part, the said end part slightly bent to the horizontal, its second section bent to the floor at an angle slightly exceeding 90 degrees to the horizontal. The closest, in terms of totality of essential features for the first variant of the claimed sectional roll-up gate for low lintel with balancing device on helical springs and for the system of single guides used on the both claimed variants of the gate is a known (RU, patent No. 2178499 C2, E05D15/16. E05D13/00, published on Sep 20, 2000) technical decision, namely, a gate with a gate leaf moved overhead in guides between the closed and open positions, having a balancing device with one end connected to the gate leaf and with the other end fixed, and containing at least a single block of helical springs comprising at least two coaxially arranged helical springs, where the internal spring has an outside helix diameter lesser than the inside helix diameter of the respective external spring, where the helical springs are made in the direction of elastic energy storage deformation in the form of tension springs, and the ends of both coaxial springs forming a single spring block are made on at least one common end that terminates in the form of a helix and are pushed on a common fastener that has the first narrow fastening section facing the springs and used for fastening of the internal spring, and a wider section adjoining it on the opposite side of the springs and used for fastening of the external spring, where the fastening sections on their edges are made with hooked bosses engageable with the pushed helix of the springs and safely 1 preventing them from being removed. Here, the system of the gate guides comprises the first two guides, each consisting of a horizontal, arc-shaped and vertical sections, and the second two guides, each consisting of a horizontal section descending (when seen with the gate leaf faced) and an end section bent at an angle. In the systems of known (patents Nos. 2178499, 2203379) designs of gate, each vertical guide (the vertical straight section of the first (lateral) guides) and an angular post connected thereto by means of plates and brackets with welding, riveting, or with fastening elements intended for fastening of the system of guides to the wall, form an assembling unit (a vertical section of the system of guides), while the horizontal sections of the guides are made of individual profiles interconnected with plates or brackets. Among the shortcomings of the assembled structure consisting of the angular post profile and a straight vertical guide interconnected in such a way that the vertical guide forms an angle of 12 to 32 with the wall, one should name increased dimensions of the assembly with an increased length of the vertical guide (with the vertical guide being, e.g., up to 3 m long, the assembly size would increase to 150 mm) and hence increased overall dimensions of a product where such assembled structure is used. Beside, use of inclined "vertical guides" requires application of lateral supports of rollers protruding from the gate leaf inward the premises, which prevents installation of a cover for protection of the roller motion zone, i.e., reduces the safety of the gate operation. Application of assembled structures of vertical guides with angular posts as well as horizontal sections of first and second guides made of individual profiles in the systems increases the labor intensity of manufacture of elements of the system of guides, and metal consumption of the product, as a whole. Besides, a common shortcoming of the aforesaid assembled structures (of the vertical guide with an angular post and horizontal sections of the first and second guides with each other) is that inside the guides there are connecting elements in the form of bolted, riveted or welded joints, their protruding elements not only worsening the exterior of the product, but also making obstacles on the way of motion of the rollers. It also has to be noted that with separate assembling of components of the left vertical guide and the right vertical guide with angular posts inversed thereto, there is a probability of arising of a difference in angles of inclination of the specified guides and, hence, possible misalignment of end sides of the gate leaf relative to each other as well as skewing and deformation of the gate leaf in the course of movement along the guides. The balancing device with tendons provided for the same used in the known design is installed in the respective horizontal section of guides in such a way that the unit of helical springs is located in parallel to this section and is fixed at one side on the end of horizontal guides opposite to the gate aperture, while on the side facing the gate leaf it has a guide roller, on the grooves of 2 which two cables are passed, which run in parallel, and are attached with the first of their ends in a fixed way at the end of horizontal guides proximal to the gate aperture, and with their other ends, in the common point of attachment in the zone of the lower edge of the panel, which is the lowermost with the gate in the closed position. Among the shortcomings of the horizontal position of the known gate balancing mechanism with tension springs, one should name insufficient reliability of the assembled structure of horizontal guides of rollers and a horizontal guide of springs (the guide of the spring unit) attached to the ceiling, along with this unit's becoming more expensive. In some designs of the known gate, the horizontally situated spring pulley-cable gate balancing mechanism occupies additional space above the horizontal guides, which assumes having a higher lintel and besides results in: - complications at assembling and adjustment of tensioning of the spring mechanism due to uneasy access overhead between the ceiling and the edge of the profile serving as a guide for the springs; - sagging of the springs, which, in its turn, make it necessary to install intermediate spacers preventing, in their turn, smooth operation of the tension springs; sagging of the inner spring resulting in the possibility of its turns being jammed between the turns of the outer spring; Known from generally available sources (www.real-qate.ru/cataloq/27/95) is use of the design of sectional roll-up gate for a low lintel, where a vertically situated spring pulley-cable gate balancing mechanism is used: units of helical springs of the mechanism are located along the guides to the left and to the right of the aperture inside the space between the end face of the gate leaf and the inner surface of the angular post. However, with this arrangement of the gate balancing mechanism, it is impossible to deliver the balancing mechanism assembled complete with the vertical guide and the angular post and with pre-tensioned springs to the mounting site, as the space for arrangement of the balancing mechanisms matches the space required for attachment of the angular posts to the wall. Besides, it is worth noting that the design of the fastening sections of the ends of springs of the unit of helical springs of the known balancing device implies screwing of the end (or its lock) into the spring, which raises labor intensity of assembling of the balancing mechanism, as such. Taken as a prototype for the second variant of the claimed design of the sectional roll-up gate for low lintel is the known (http://www~rollstavnvru/direction7.php) sectional ceiling gate comprising a gate leaf movable in the system of guides, where balancing of the gate leaf is exercised by means of a torsion (spring-inertial) mechanism comprising a shaft installed in bearings fixed on angular posts of supporting brackets, the aforesaid shaft having at least one torsion spring, one of its ends fixed on the shaft and rotating with the shaft, its other end attached in a fixed way to the wall with an inner supporting bracket and having a pair of drums fixed rigidly on its ends, which, 3 with the shaft rotating, has a cable fixed on the bottom angular bracket of the gate leaf being coiled thereon. A known (RU, 2226597. C2, MPK E05D13/00, published on Apr 10, 2004) system blocking the gate leaf in case of damage of the torsion mechanism is a device for control of the torsion spring operating pre-tensioned and provided as a balancing spring for a gate leaf movable overhead, which comprises, along with a torsion shaft loaded with an unbroken spring, a blocking element, which, for blocking this rotational motion and owing to this motion of the gate leaf, is made to enable catching and locking by means of a catching link containing a gear-tooth system, as well as a sensitive and starting device for taking the tension of the spring and causing movement of the catching link from the working position into the catching position, as a response to the spring break registered by the sensitive element. Among the shortcomings of the known device for control of the spring, one should name use of a special (off-standard) bracket for attachment of the device to the wall and a special cable drum with an inner gear rim on the outer casing, which, with the spring broken, takes the impact load of the catching link of the device, which could result in destruction of the cable drum thus spoiling the mechanism of coiling cables of the torsion mechanism. The problem to be solved with the group of inventions consists in modernization of existing designs of the sectional roll-up ceiling gate. The main single technical result that can be achieved through implementation of the claimed group of inventions consists in reducing overall dimensions of the product for using the same for apertures with a very low lintel, as well as reducing the product's unit cost due to reducing the labor intensity at manufacture of its structural elements, at assembling and mounting of its components. The above single technical result for the object "system of guides" of the presented group of inventions is achieved through the fact that the system of guides of the sectional roll-up gate consists of a pair of vertical guides combined with angular posts, situated on both sides of the aperture and intended for attachment to the wall (hereinafter referred to as combined vertical guides), each of which constitutes a single long profile with a row of grooves and/or holes in its lower part for adjustment of tension of the spring pulley-cable gate balancing mechanism, each connected by means of a double bend of the guides to the corresponding double horizontal guide, each implemented of a single long profile made up of two identical long C-section webs with guiding surfaces, the upper of which is a guide for the rollers of the upper panel of the gate leaf, while the lower one, for the rollers of the gate leaf panels, except for the uppermost one, where the double bend of the guides consists of two bends, the lower of which serves to smooth connection of the long web of the combined vertical guide to the lower web of the double horizontal guide, while the upper bend is a terminal element of the upper web of the double horizontal guide; a connecting 4 bracket ensuring smooth connection of the bends to the webs of the double horizontal guide, and abutting with the combined vertical guide of the bracket of attachment to the wall in the form of angular profile, where in the lower part of its rib, due to its outline pattern, side walls of the profile are bent inside in such a way that the section of this profile in its lower part matches a part of the section of the profile of the combined vertical guide, where the bracket for attachment to the wall of the double bend of the guides is used for further installation thereon of a terminal bracket for attachment of a double sheave of the spring pulley-cable gate balancing system, or a terminal supporting bracket for installation of the shaft of the torsion gate balancing mechanism. The vertical guide combined with the angular post used in the claimed design is a single cold rolled steel profile combining in itself functions of a vertical guide for the rollers of the gate leaf and the angular post ensuring rigidity of attachment to the walls of the system of guides (system of single guides). Combining of the vertical guide and the angular post into a single profile enables to improve aesthetics of the exterior, as well as eliminate shortcomings of the design, process of manufacture and mounting typical for assembled structures of individual vertical guides with angular posts through: - elimination of connecting elements (plates and brackets) required for assembling of the angular post and the vertical guide, as well as exclusion of the operation of assembling of vertical guides and angular posts through riveting, or welding, or connecting with bolts and nuts from the production process; - elimination of misalignment of end faces of the gate leaf relative to each other, as well as skewing and deformation of the gate leaf at movement along the guides through elimination of a difference in inclination angles of the right and left vertical guides. Combination of the vertical guide and the angular post also results in reduction of overall dimensions of the structure of the combined vertical guide, compared to the assembled structure (a vertical guide with an angular post), and hence, overall dimensions of the gate, where a system of guides with combined vertical guides is used. Strict parallelism of the guiding (the guiding surface of the long web (C-section part) of the profile) is the surface guiding the roller at motion) and the bearing (the bearing surface of the profile attached to the wall) surfaces of the profile of the combined vertical guide, as well as high precision of their mutual arrangement typical for profiles manufactured by the rolling method, enable, at mounting of the gate, to ensure mutual parallelism and location in the same plane of trajectories of motion of the rollers on the both end faces of the gate leaf without performing additional operations of control and alignment of mutual situation of the units (rollers located in two vertical guides on both sides of the gate leaf) of the system of guides, the aforesaid operations being necessary prior to attachment of elements of the system of guides to the walls of the premises. The straightness 5 and verticality of the combined vertical guide ensure strictly vertical motion of the leaf rollers along the guides at movement of the gate, which reduces losses of power of the gate balancing mechanism for friction of rollers against the vertical guides. As a rule, the bearing (wall-mounted) surface of the combined vertical guide and the bracket for attachment to the wall of the double bend of the guides have edge flanges for installation of lateral packer ensuring leak-tight overlapping of gaps between the gate leaf and the combined vertical guide throughout the height of lateral sides of the aperture. Using of a double horizontal guide in the form of single profile enables, as it is in the case of the combined vertical guide, to eliminate shortcomings of design, manufacture process and mounting typical for horizontal guides assembled of individual profiles by means of connecting plates or brackets, namely: to eliminate connecting elements (plates and brackets, bolted, riveted and welded joints) required for attachment of sections of horizontal guides to each other, and to eliminate operations of assembling of double guides from the manufacturing process. Availability of special longitudinal grooves inside long webs of single profiles of combined vertical guides and double horizontal guides for arrangement therein of heads of fastening elements required for assembling of guides with other structural elements of the system of guides, reduces the probability for the leaf rollers to touch protruding parts of the connecting elements (heads of screws) as the rollers move along the guides. Additional places for bending of profiles arising at manufacture of grooves make the guides more rigid. The bracket for attachment to the wall of a system of guides intended for attachment of bends, complete with a combined vertical guide and a double horizontal guide to the wall, is an angular profile. The outline (with the profile dissected along the rib upwards and farther having an incision transversal to the rib) cut of the rib in the lower part of the angular profile and bending of the lateral walls inwards the profile in such a way that the section of this profile in its lower part would match a part of the section of profile of the combined vertical guide, serve to formation of space for free movement of the gate suspending cable of the spring pulley-cable gate balancing mechanism on the inner side of the combined vertical guide to its outer side, while the lateral walls of the profile ensure exact positioning of the lower bend of the double bend of the guides with the combined vertical guide. In a particular case of the invention of the system of guides, each of the combined vertical guides may be made composed of the lower part of a single long profile with a row of grooves and/or holes for adjustment of tension of the spring pulley-cable gate balancing mechanism, and the upper part of the single long profile of the combined vertical guide without similar grooves or holes attached to the lower part. Use of a composite combined vertical guide is advantageous for optimization of production and storage logistics of small enterprises at storage and manufacture of 6 gates with different options of balancing mechanisms of the minimum number of components. This advantage is only important in case there is no specialized stamping equipment or fixtures at the small enterprise. Besides, on the lateral surface of the bracket for attachment to the wall of the double bend of guides, a hole may be made for temporary fixation of the lower ends of the cable of the spring pulley-cable gate balancing mechanism, which is used at delivery of the gate balancing mechanism assembled with a vertical guide and an angular post to the mounting site. A peculiarity of the design of the double bend of the guides is the possibility to use the same both complete with a terminal supporting bracket for installation of the shaft of the torsion gate balancing mechanism, and complete with a terminal bracket for mounting of a double sheave of the spring pulley-cable balancing system, i.e., irrespective of the type of the ordered gate. Therefore, the claimed system of single guides is versatile, i.e., applicable in gates of any type, irrespective of the gate balancing system used therein. At the same time, both of the versions of double bend of the guides complete with a bracket of attachment to the wall are assembled at factory by the method of contact or projection welding with subsequent application of the protective decorative paintwork and are delivered for installation in the form of single assembly units. Mounting of the combined vertical guide is implemented jointly with double bending of the guides. The described design of double bending of the guides is used within a gate with a system of guides made of single profiles; however, application of principles embedded therein is also possible in assembly units of double bending of conventional systems of guides of sectional roll-up gate. The single technical result for the first (gate with spring pulley-cable gate leaf balancing mechanism) of the claimed variants of the gate is achieved owing to the fact that the sectional roll up gate for low lintel comprises a bearing frame with a system of guides and a horizontal crossbar installed above the upper edge of the gate; a gate leaf comprising a number of successively located and pivotally interconnected horizontal panels and movable by means of rollers located on sides of the panels between the closed and the opened positions in the system of guides, and a spring pulley-cable gate balancing system, which comprises a pair of units of twin springs installed vertically on both sides of the aperture outside the combined vertical guides, two cables with ends fixed on the respective lower angular brackets of the lower panel of the gate, and a pair of terminal brackets for attachment of double sheaves each installed on the bracket for attachment to the wall of the respective double bend of guides of the system of guides; where each of the units of twin springs consists of two coaxially arranged helical tension springs, the inner one of which has its outer helix diameter smaller than that the inner helix diameter of the outer spring, an upper end with a built-in double sheave and a lower end that is fixed in one of the grooves or holes in the lower part of the combined vertical guide, and is installed vertically outside the combined vertical guides 7 on both sides of the aperture in such a way that the cable fixed on the lower angular bracket of the gate lower panel passes on the inner side of the combined vertical guide, enveloping the double sheave of the terminal bracket for attachment of the double sheave, to its outer side, descends forming a loop, which is led behind the sheave of the upper end of the unit of twin springs, uncoiled, taken upwards and fixed on the terminal bracket for attachment of the double sheave, which is installed on the bracket for attachment to the wall of the double bend of the guides of the system of guides, which consists of a pair of vertical guides combined with angular posts, situated on both sides of the aperture and intended for attachment to the wall, each of which constitutes a single long profile with a row of grooves or holes in its lower part for adjustment of tension of the spring pulley-cable gate balancing mechanism, each connected by means of a double bend of the guides to the respective double horizontal guide, each implemented of a single long profile made up of two identical long C-section webs with guiding surfaces, the upper of which is a guide for the rollers of the upper panel of the gate leaf, while the lower one, for the rollers of the gate leaf panels, except for the uppermost one, where the double bend of the guides consists of two bends, the lower of which serves to smooth connection of the long web of the combined vertical guide to the lower web of the double horizontal guide, while the upper bend is a terminal element of the upper web of the double horizontal guide; a connecting bracket ensuring smooth connection of the bends to the webs of the double horizontal guide, and abutting with the combined vertical guide of the bracket of attachment to the wall in the form of angular profile, where in the lower part of its rib, due to its outline cut, side walls of the profile are bent inside in such a way that the section of this profile in its lower part matches a part of the section of the profile of the combined vertical guide. The single technical result for the second (gate with torsion gate leaf balancing mechanism) of the claimed variants of the gate is achieved through the fact that the sectional roll-up gate for low lintel comprises a bearing frame with a system of guides and a horizontal crossbar installed above the upper edge of the aperture, a gate leaf comprising a number of successively located and pivotally interconnected horizontal panels and movable by means of rollers located on sides of the panels between the closed and the opened positions in the system of guides, and a gate balancing system, which consists of a torsion mechanism comprising a shaft installed in bearings fixed on angular posts of terminal supporting brackets, this shaft having at least one torsion spring, one of its ends fixed on the shaft and rotating with the shaft, its other end attached in a fixed way to the wall with an inner supporting bracket and having a pair of drums fixed rigidly on its ends, which, with the shaft rotating, has a cable fixed on the bottom angular bracket of the gate leaf being coiled thereon, and a pair of terminal supporting brackets of installation of the shaft of the torsion mechanism, each fixed on the bracket for attachment to the wall of the respective double bend of the system of guides, which consists of a pair of vertical guides combined with angular posts, 8 situated on both sides of the aperture and intended for attachment to the wall, each of which constitutes a single long profile with a row of grooves and/or holes in its lower part, each connected by means of a double bend of the guides to the respective double horizontal guide, each implemented of a single long profile made up of two identical long C-section webs with guiding surfaces, the upper of which is a guide for the rollers of the upper panel of the gate leaf, while the lower one, for the rollers of the gate leaf panels, except for the uppermost one, where the double bend of the guides consists of two bends, the lower of which serves to smooth connection of the long web of the combined vertical guide to the lower web of the double horizontal guide, while the upper bend is a terminal element of the upper web of the double horizontal guide; a connecting bracket ensuring smooth connection of the bends to the webs of the double horizontal guide, and abutting with the combined vertical guide of the bracket of attachment to the wall in the form of angular profile, where in the lower part of its rib, due to its outline pattern, side walls of the profile are bent inside in such a way that the section of this profile in its lower part matches a part of the section of the profile of the combined vertical guide. The possibility to provide the gate with one of the types of the balancing mechanism without changing the design and composition of the gate leaf, as well as the structural elements of the system of guides, being an exclusive feature of the sectional roll-up gate with the proposed system of single guides, ensures the maximum efficiency of organization of manufacture of such gate, its storage and logistics. Installation of a horizontal crossbar connected to the combined vertical guides above the upper edge of the aperture in the claimed variants of the gate, serves, along with the aforesaid features of the system of guides in use, to reducing the lintel required for mounting of gate, without deterioration of leak-tightness of sealing of joints between the gate leaf and the outline of the gate aperture, when the gate is in its closed position. Leak-tight overlapping of gaps between the gate leaf and the combined vertical guide throughout the height of lateral sides of the aperture is ensured owing to the fact that the plane of the horizontal's crossbar joining the wall, the bearing surface of the combined vertical guide and the bracket of attachment to the wall of a double bend of guides of the system of single guides have edge flanges for installation of lateral packer. In any of the claimed variants of the gate, for thermal insulation of metal elements of the system of guides (these elements located in immediate proximity to the aperture), lateral packer is used installed on the edge flange of the guide combined with the vertical one and farther, on the flange of the bracket of attachment to the wall complete with a double bend of the guides, the aforesaid packer comprising a lock part formed with brace webs, a rigid hollow housing formed with walls normal to the webs of the lock part, and a soft lug of a considerable length. The proposed design of lateral packer ensures a high degree of leak-tightness (tight closure of the air flow from outside of the premises inwards) between the gate leaf and elements of the aperture edging all 9 along its outline of the aperture, increases corrosion resistance of steel elements of edging of the aperture and elements, and increases the strength of the structure in the lateral packer area. Installation of the profile of lateral packer on the mounting site is performed assembled with the combined vertical guide. Assembling of the lateral packer with the aforesaid vertical guide is performed in conditions of manufacture of elements of the system of guides, or prior to the beginning of mounting. Numerous existing analogs of lateral packers of other manufacturers do not feature the complete set of the above-mentioned properties of the lateral packer described and leave metal parts of elements of the system of guides exposed, or cover these metal parts with a thin layer of plastic, thus not ensuring sufficient thermal insulation between the outer and the inner spaces of the mounting site. Therefore, the proposed design of the gate, for both of the claimed variants, enables to achieve high leak-tightness of joints of the gate leaf with elements of the aperture edging - single vertical guides and the upper horizontal crossbar, by means of a special lateral packer. This ensures thermal insulation along the outline of the aperture of the elements (combined vertical guides, a bracket of attachment to the wall assembled with a double bend of the guides and the horizontal crossbar) of the system of guides. It is possible to use the claimed system of guides with special supports and brackets with rollers fixed in roller-holders adjustable in three axes installed on the gate leaf: lateral supports of middle panels of the leaf, lower angular brackets of the lower panel of the leaf, upper angular brackets of the upper panel of the leaf. Installation of lateral supports, upper and lower angular brackets on the gate panel is performed in conditions of manufacture prior to packing of the gate, which makes its installation easier and more accurate, reduces the mounting time, as distinct from widely used methods of installation of lower angular brackets at mounting. In variants of the gate of the claimed design, the lateral supports are sunk "inside" the panels in such a way that they virtually do not protrude above the surface of the panels and can even be covered with profile for protection of the roller motion zone (profile for protection of the combined vertical guide). The aforesaid location (vertically outside the combined vertical guides on both sides of the aperture) of spring pulley-cable gate balancing mechanisms, combined with use of terminal brackets for attachment of double sheaves of the balancing system complete with double bends of guides of the system of single guides, makes it possible: - to assemble the spring pulley-cable gate balancing system with combined vertical guides completely in conditions of manufacture, - to perform pre-tensioning of springs; 10 - to fix the assembled cables in holes of double bends of the guides temporarily by means of a bolted joint in a position corresponding to the closest position of the axis for fixing the cable on the gate leaf; - to deliver the balancing system completely assembled to the mounting site, thus reducing considerably the number of operations of the system installation. The following manufacture of structural elements is preferable for the spring pulley-cable gate balancing system used in the gate model according to the first claimed variant: 1) Use of helix springs with the same coiling direction. 2) Making stems, on which the ends of coaxial springs forming one spring unit, scissor-like brackets of ends of the springs are slipped and fixed, extendable. Reliable abutment of turns of springs in areas of engagement with sections of scissor-like brackets is also additionally ensured through pressing the ends of helices of springs against edges of the scissor-like bracket as a result of extending its movable part relative to the fixed one. 3) Making ends of springs with scissor-like brackets, and each stem of scissor-like brackets in such a way that it has a terminal narrow fastening section with paired crooked staggered projections for attachment of the inner spring and, adjacent to the first narrow fastening section, on the side opposite to the springs, a wider fastening section with similar projections for fastening of the outer spring. Using such design of the ends of springs enables to reduce labor intensity of assembling of the unit of twin springs, with the operation of screwing the end, or its lock, into the twin spring eliminated, while the availability of crooked projections ensures more accurate location of the spring turn in the engagement area owing to the staggered arrangement of projections in the pair, and safely prevents removal of the springs. 4) Making the end bracket for attachment of double sheaves composed of the following interconnected elements: a base with a fixed lock for a loop of the cable of the gate balancing system, a plate and a double sheave fixed in parallel to the wall plane on the axis in-between. Safety of operation in the claimed variants of the gate is ensured through: - protection of the roller motion zone (protection profile of vertical guide) with any type of the balancing mechanism; - protection of the tension spring (the gate with a spring pulley-cable gate balancing mechanism); - prevention of break of the torsion mechanism spring (the gate with the torsion gate balancing mechanism). 11 The complete set of profiles (profile for protection of the roller motion zone (profile for protection of the guide) and the profile for protection of the spring motion zone (helical tension spring of the spring pulley-cable balancing mechanism)) serve to prevent people and foreign objects into the areas of motion of the gate elements (tension springs and roller supports with rollers), as well as to ensure noiseless operation of movable units of the gate in the area of location of combined vertical guides and attractive appearance (aesthetic qualities) of the gate inside the premises. Therefore, the claimed designs of the gate, irrespective of the type of the balancing mechanism used therein, may be additionally equipped with long profiles for protection of the roller motion zone, these profiles installed on combined vertical guides. Known are structural elements (protective plastic washers or screens on rollers, lateral covers of gate panels with profiled flanges located above the vertical guide) of the roller motion zone, which are installed on movable elements of the gate leaf and also pose a threat of personal injury in the course of operation, while being closed. In contrast, profiles for protection of the roller motion zone installed on combined vertical guides remain immovable in the course of operation of the gate, thus ensuring continuous protection. It is possible to use L-section profiles for protection of the roller motion zone, each of these profiles comprising a horizontal elastic web, which, with the profile installed on a combined vertical guide, is positioned in parallel to its bearing surface and serves to overlapping the space between the gate leaf and the edge of the combined vertical guide, and a vertical web, which comes in contact with the flat surface of the long web of the combined vertical guide, whereas a rigid thrust hook inside the profile for protection of the roller motion zone, bearing against the outer surface of the edge of profile of the combined vertical guide, ensures accurate positioning of the profile for protection of the roller motion zone relative to the above guide, while teeth on the outer surface of the vertical web of the profile serve to its positioning without slippage or displacement relative to the profile for protection of the tension spring in the course of mounting. The gate (first variant) with a spring pulley-cable gate balancing system may be equipped with profiles for protection of the roller motion zone. There are no analogs of protective casings of vertically positioned tension springs for sectional roll-up gate as, while the gate is being opened and closed, the springs contract or expand, the upper movable ends of the springs moving along with them. As profiles for protection of the spring motion zone, profiles may be used, each comprising two staggered vertical webs interconnected with a horizontal bridge, one of such webs positioned at mounting of the profile normal to the bearing surface of the combined vertical guide, while the teeth 12 of the second vertical web engage with the teeth made on the outer surface of the vertical web of the profile for protection of the roller motion zone. Profiles for protection of the roller motion zone and profiles for protection of the spring motion zone may be used as a complete set of protection profiles, or individually, depending on availability or absence of tension springs in the structure of the gate. Using this complete set of profiles ensures high safety of the gate operation in everyday conditions and makes it possible to stay in immediate proximity to the moving gate. Protection profiles are manufactured by the extrusion method of plastic mixes with hardness of at least 90 HS, or of other materials ensuring noise absorption of moving roller and springs, resistance to aggressive media of common origin (gasoline, oils, dirt) and attractive appearance of the product. The gate according to the second claimed variant having a gate balancing system with a torsion mechanism may be additionally equipped with a device for protection from spring break, which, in a particular embodiment, consists of a housing, which features concentric grooves for enabling movement of bolts of the fixed end of the torsion spring of the torsion mechanism, an anti friction bearing press-fitted into a housing for free rotation of the spring complete with its end in case of the spring break, and a bracket for attachment of the housing to a terminal supporting bracket of the shaft installation; a torsion mechanism of a ratchet wheel installed on the shaft in a fixed way, as well as a housing of an element for wedging into the ratchet wheel installed on the rotation axis jointly with a minor torsion spring, the aforesaid housing attached to the wall in a fixed way. Structural peculiarities of the aforesaid device for protection from break of the spring also allow reducing overall dimensions of this device to the point that, when it is installed on the shaft of the torsion mechanism above the horizontal crossbar connected with combined vertical guides in a rigid frame, the height of the lintel of the sectional roll-up gate with a balancing mechanism located above the gate aperture is within 135 mm, which is considerably smaller than existing analogs of other manufacturers. In other words, a device of traditional type with a conventional operation principle is arranged within so small overall dimensions, which enable to use the above protection device on a gate with torsion springs of a diameter of 45-50 mm and with a lintel of 135mm. In addition, as tests have indicated, with such spring break protection device used, in case of a spring break, springs fall by 3 to 4 cm, whereas the European safety standards require the gate fall to be kept within 30 cm. Therefore, the safety guarantee is ensured to a point, where the European standards are exceeded with a factor nearly as high as ten. 13 The gate may be raised and lowered manually or by means of an electric drive. Handles attached to the gate leaf, as well as a rope or gear driven by chain, are used for manual operation. In the claimed variants of the gate, a chain ceiling electric drive may be used made up of an electric motor and a remote control unit, which is mounted to the wall at any convenient place and is combined with the sectional gate into a single structural assembly. The electric motor's being located separately from the control unit enables to reduce considerably dimensions of the drive structure installed right on the ceiling of the premises. This, in its turn, allows automation of the sectional gate in premises, where it was previously impossible due to the minimum size of the lintel. All the chained ceiling electric drives for sectional gate known as of today are mounted on the ceiling in the center relative to the gate width and have their own attachment brackets, which makes the mounting process more complicated and time-consuming. Installation of an electric motor directly on horizontal guides of the sectional gate makes it possible to deliver a pre assembled product to the customer directly from factory. This solution saves considerable time needed for mounting of the structures and requires no extra space on the ceiling of the premises, or additional fastening. The electric motor in use is generally covered with a decorative housing made of high strength plastic of glossy texture, which prevents atmospheric dust from building up on the housing surface, and minimizes efforts for exterior maintenance. The electric motor control unit with a panel for setup of the electric motor operation is brought out in a standalone structure and may be installed at any convenient place on the wall of the premises. This solution has a number of advantages compared to analogs available on the market, where the panel for setup of the drive operation is located right on the housing of the electric drive located on the ceiling: - access to the setup panel is easier, which facilitates the process of setup of the electric motor operation and, accordingly, saves a lot of time taken by setup of the drive operation; - allows installation of the unit in the heated part of the building, which increases stability of operation of the electric motor located in the non-heated part of the building. The control unit is generally equipped with a built-in electric motor control button located on the front panel of the control unit housing and intended for operating the drive from inside the premises. This solution requires no additional installation of an external control button, which facilitates mounting and saves time. The control button may be implemented with a backlit outline, which makes operating the drive in dark premises much easier. Below are particular embodiments of the housing of the control unit: 14 - furnishing the housing with a dome light intended for illumination of the premises at the moment of opening of the gate - to facilitate orientation in the premises without prior switching the centralized lighting source on; - making the housing of high-strength plastic of white color with glossy texture - neutral design implementation of the housing allows installing the control unit at any place without disrupting the general concept of appearance. When an electromechanical drive is used for raising and lowering the leaf, it is proposed to use a laterally positioned drive with a system of attachment of the guiding carriage of the drive to the single twin horizontal guide, and with the guiding carriage of the drive attached to a special upper angular bracket with an adjustable roller holder and an adaptor for attachment of the drive rod. The gate without electric drive is shut with a spring bolt or a crossbar lock. The crossbar lock enables to shut the gate both from inside, and from outside. Shutting with a bolt is only possible from inside. The entire complex of assemblies interconnected according to the proposed arrangement enables to meet the customers' needs in gates for mounting sites: - with a very low lintel, i.e., with a very small distance from the upper edge of the aperture to the ceiling; - the need in thermal insulation of joints and, hence, in energy saving; - the need in operational safety and attractive appearance of the product with the minimum cost of the product and its mounting. Reduction of the number of assemblies and parts arriving to be mounted within a single complete set of gate, enables to ensure high quality of assembling of individual components at factory owing to use of welded, not bolted, joints, owing to application of protective decorative coating of all the elements of the complete assembly, and reduces labor intensity of assembling work due to elimination of operations of joining individual parts of the gate into pre-assembled units directly on the mounting site. The proposed design of the gate solves a number of problems on reducing the unit cost of the product along with lower metal consumption of components, a smaller number of assembling operations, as well as the amount and labor intensity of mounting operations. For clarification of the claimed group of inventions, the following graphical materials are presented: - fig. 1 is the general isometric view (detail) of sectional roll-up gate for low lintel with a system of single guides and a spring pulley-cable gate balancing system; - fig. 2 is the general isometric view (detail) of the bearing frame of the gate; 15 - fig. 3 is combined vertical guide: a) general isometric view of the profile of combined vertical guide, b) section of profile of combined vertical guide c) general view (detail) of composite combined vertical guide; - fig. 4 is double horizontal guide: a) general isometric view of double horizontal guide, b) section of profile of double horizontal guide; - fig. 5 is general isometric view of double bend of guides complete with terminal supporting bracket of double sheave of gate balancing system: a) front view (inside) b) rear view (outside); - fig. 6 is general isometric view of lateral support; - fig. 7 is general isometric view of angular bracket; - fig. 8 is upper angular brackets: a) view of gate leaf; b) view from the end face of the gate; - fig. 9 is isometric view of horizontal crossbar, complete with lateral packer, fixed above the upper edge of the gate aperture; - fig. 10 is isometric view of lateral packer fixed on the edge of combined vertical guide; - fig. 11 is lateral packer (profile section); - fig. 12 is detail of installation of spring pulley-cable gate balancing system on one of combined vertical guides of the gate; - fig. 13 is general isometric view of the unit of twin springs; - fig. 14 is general view of ends of the unit of twin springs: a) upper end b) lower end; - fig. 15 is end bracket for attachment of double sheaves installed on the bracket for attachment to the wall of double bend of guides: a) front view, b) view from the side of the wall; - fig. 16 is detail of running cable of spring pulley-cable gate balancing system; - fig. 17 is complete set of profiles: a) profile for protection of the roller motion zone, b) profile for protection of spring motion zone from jamming of fingers, c) detail of installation of complete set of profiles on combined vertical guide; - fig. 18 is isometric view of sectional roll-up gate for low lintel with system of single guides and system of gate balancing with torsion mechanism; - fig. 19 is general isometric view of double bend of guides, complete with terminal supporting bracket of shaft installation: a) front view (inside) b) rear view (outside); - fig. 20 is isometric view of device for protection from break of spring: a) view as seen from ratchet wheel, b) view from torsion mechanism spring. Below, in examples of description of specific design of sectional roll-up gate for low lintel with spring pulley-cable gate balancing system (Example 1) and design of device for protection from break of spring (Example 2) of gate with torsion gate balancing mechanism, data is presented, 16 which confirms possibility of implementation of the claimed group of inventions, with a single technical result obtained. Example 1. A sectional roll-up gate (fig. 1) for low lintel comprise gate leaf 1, bearing frame (fig. 2) with a system of single guides and horizontal crossbar 2 and a gate balancing system with spring pulley cable mechanism 3. Gate leaf 1 comprises a number of horizontal panels (sections) successively located and pivotally interconnected with loops, these sections constituting steel hot-galvanized double-wall sandwich panels with the inner cavity filled with foamed polyurethane. The leaf passes from the vertical (closed) position to the horizontal (open) position as a result of displacement and orientation of the leaf panels in the system of single guides by means of rollers situated on sides of the panels. The system of single guides constitutes (fig. 2) an assembled structure of two combined vertical guides 4, each connected by means of double bends 5 to respective double horizontal guides 6. Each combined vertical guide 4 of the system of guides is implemented (fig. 3) in the form of a single cold-rolled long profile, its section constituting interconnected L-section (angular post, angular profile) and C-section (straight guide) parts. The profile has bearing 7 surface located on the L-section part and attached to the wall, this surface being strictly parallel to guiding surface (the surface getting in contact with the roller and directing the roller at motion) 8 of the long web (C section part) of the profile, inside which there is longitudinal groove 9 to accommodate screws used for assembling of guides with other structural elements of the system of guides. In the lower part of the combined vertical guide, on the surface, which is normal to the bearing surface of the profile, there is a row of rectangular grooves 10 and holes 11 for adjustment of balancing of the gate weight, upon completion of mounting of the gate. It is allowed to use in the gate design a composite combined vertical guide (fig. 3c) in the form of a part of combined vertical guide of small length 12 with rectangular grooves 10 and holes 11 connected by means of connecting plate 13 to measuring piece of combined vertical guide 14 without similar grooves or holes. The single profile for the combined vertical guide is manufactured by the method of rolling of a 1.4-1.5 mm thick cold galvanized steel band with subsequent application of protective-decorative coating by the method of cold galvanization or powder spraying. Mounting of the combined vertical guide is performed jointly with a double bend of the guides complete with a bracket for attachment to the wall and consists in mounting of the factory-assembled unit to the walls, leveling of combined vertical guides according to the plumb line and attachment of the unit to the wall with screws. 17 Double horizontal guide (fig. 4) 6 of the system of guides is a single steel cold-rolled hot galvanized profile, in which two identical profiles 15 are structurally combined, that are used: the lower one, as a guide for rollers of the gate leaf panels, except for the uppermost one; the upper one, for rollers of the upper panel of the gate leaf. Each of the two identical C-section profiles (long webs of the guide) has guiding surfaces 16 and longitudinal grooves 17 for accommodation of heads of fasteners required for assembling of the double horizontal guide with other structural elements of the system of guides and attachment of the double horizontal guide to the ceiling of the mounting premises. The profile is rendered more rigid owing to bending places 18 formed as a result of manufacture of the groove. The single profile of the double horizontal guide is manufactured by the method of rolling of a 1.4-1.5 mm thick cold-galvanized steel band with subsequent application of protective-decorative coating by the method of cold galvanization or powder spraying. Mounting of the combined horizontal guide consists in installation of a single profile of the double horizontal guide cut at factory to a required dimension (with pre-manufactured holes for attachment to joining elements of the system of guides) on the bracket for attachment of the horizontal guide, leveling of the profile according to the horizontal level and attaching the profile to the bracket for attachment of the double horizontal guide to the wall, to the bracket for attachment of the double horizontal guide and the C-section profile, and to the bracket for attachment to the ceiling. Double bend of guides (fig. 5) 5 is an assembly of the system of single guides and comprises two bent elements (hereinafter referred to as bends) 19, 20, connecting bracket 21 and bracket for attachment to the wall 22. The aforesaid bent elements are intended for the following: - the lower bend (arc) 19 serves to smooth connection of the combined vertical guide to the lower web of the double horizontal guide, with formation of a guide for rollers of the gate leaf panels, except for the uppermost one; - the upper bend (the bend profile has a first section, which is slightly inclined to the horizontal, and a second section, which is bent at slightly more than 90 degrees to the horizontal towards the floor) 20 is terminal element of upper web 15 of the double horizontal guide and terminates the upper web of the double horizontal guide in such a way that it would be possible to enable adjusting the position of the upper roller, depending on the manual method of opening and closing the gate, or opening and closing by means of an electromechanical drive. Connecting bracket 21 with flat blanked outlines and a group of holes ensures reliable and smooth connection of bends 19, 20 to the double horizontal guide. Bracket for attachment to the wall 22, being a structural element of the "double bend of guides" assembling unit, constitutes an angular profile with two mutually normal lateral walls and 18 with grooves for attachment of the bracket to the wall, with edge flange 23 for installation of lateral packer, which ensure leak-tight overlapping of gaps between the gate leaf and the combined vertical guide throughout the height of the lateral sides of the aperture (the edge flange on the angular post is identical to the edge flange of the bearing surface of the combined vertical guide), and a flat blanked outline for ensuring its abutment with the combined vertical guide (with the L section part of the profile of the combined vertical guide). In the lower part of the angular profile of the bracket for attachment to the wall, as a result of outline cut of the rib and bending the profile lateral walls inwards the profile, space 24 is formed for free motion of the gate suspension cable of the spring pulley-cable gate balancing mechanism. For temporary fixation of lower ends of the cable tied down in the course of operation onto steel thimbles of the lower angular bracket of the lower panel of the gate, there is hole 25 made on the lateral side of the profile. The double bend of the guides in use is applied complete with terminal bracket of double sheave 26 of the spring pulley-cable balancing system. Displacement of the gate leaf is exercised along the guides by means of rollers (fig.1) fixed in roller holders of lateral supports 27, of lower 28 and upper 29 angular brackets. For ensuring movement of middle panels of the gate leaf in the system of guides there are provided lateral supports with adjustment of the roller position in three axes. Every lateral support (fig. 6) has base 30, web 31 located normal to the base and turned inward the space between the gate leaf end face and the combined vertical guides, with roller-holder 32 with roller 33, its axis being able to move longitudinally in the cylinder-shaped roller-holder channel, and grooves 34 for adjustment of the position of the roller-holder with a roller in the guides, installed on the above web. Installation of the lateral supports onto the middle panels of the gate leaf is performed in conditions of manufacture prior to packing of the products. For movement of the lower panel of the gate leaf in the system of guides and for fixation of the lifting cable of the gate balancing mechanism at the lower point of suspension of the gate leaf, there is provided installation of lower angular bracket 28 with adjustment of the roller position in three axes on the lower panel of the gate leaf. The lower angular bracket (fig. 7) has base 35, web 36 with roller-holder 37 with roller 38 and axis of suspension 39 of the lifting cable installed thereon, the above web located normally to the base and turned inward the space between the end face of the gate leaf and the combined vertical guides. Availability of grooves (not shown) on the web of the bracket enables to exercise adjusting the position of the roller-holder with the roller in the aforesaid guides, while the roller axis can move longitudinally in the cylinder-shaped roller-holder channel. Installation of lower angular brackets onto the lower panel of the gate leaf is performed in conditions of manufacture prior to packing of the product. 19 For ensuring movement of the roller of the upper panel of the gate leaf along the upper bend and along the upper horizontal guide, upper angular brackets 29 are installed on the upper panel of the gate, with adjustment of the roller position in three axes. Each such bracket (fig. 8) has base 40, web 41 with roller-holder 42 with roller 43, the axis of which can move longitudinally in cylinder shaped channel of roller-holder 42, and with grooves 44 for adjusting horizontal displacement of the roller-holder, the above web located normally to the base and turned inward the space between the end face of the gate leaf and the combined vertical guides. Grooves 45 on the roller-holder are made for adjustment of its vertical position. Rib 46 made on roller-holder 42 increases the latter's bending strength in case of impact and dynamic loads during movement of the gate leaf along the guides. Installation of the upper angular brackets onto the upper panel of the gate leaf is performed in conditions of manufacture prior to packing of the product. The structures in use of the lateral supports, the upper and the lower angular brackets of the upper angular bracket enable: a) owing to mutually normal arrangement of the base of each lateral support/angular brackets with its web turned inward the space between the end face of the gate leaf and the combined vertical guide, to locate the rollers in the space between the end face of the gate leaf and the combined vertical guide; b) by means of grooves located on the webs, to adjust the location of the roller holder with the roller in the guides for bringing the leaf nearer to the wall or farther from the wall, thus ensuring the leak-tightness of the sealing around the outline of the gate leaf's abutment to the wall; c) for the rollers to move freely along its respective axis in cylinder-shaped channels of roller-holders, compensating on its own skewing in installation of the system of guides. For the purpose of sealing of the joint between the gate leaf and the outline of the gate aperture in its closed position, installation (fig. 9) is provided, above upper edge 47 of the aperture, of horizontal crossbar 2, with lateral packer 49 attached (latched) onto longitudinal flange 48 of the plane of the crossbar's abutment to the wall. The horizontal crossbar for attachment of the lateral packer above the upper edge of the gate aperture is manufactured by the method of rolling of a 1.4 1.5 mm thick cold-galvanized band, with subsequent application of protective-decorative coating by cold galvanization (possibly, powder-spraying). Mounting of the horizontal crossbar jointly with lateral packer pre-installed thereon, consists in its being attached to the wall above the upper edge of the gate aperture with self-drilling screws. The same lateral packer (fig. 3, 5, 10) installed on flange 50 of the combined vertical guide and identical flange 23 of the bracket for attachment to the wall of the double bend of the guides is used for leak-tight overlapping of gaps between the gate leaf and elements of edging of the 20 aperture all along the outline of the aperture, preventing outside air from penetrating inside the premises. A specific feature of the design of the lateral packer profile in use (fig. 11) is availability of a lock formed by two brace webs of the lock (the lock part of the profile), a rigid hollow housing formed by two walls 52 normal to webs 51 of the lock part, and soft lug 53 of a considerable length, which ensures leak-tight overlapping of the gaps between the gate leaf and the elements of the aperture edging all along the outline of the aperture. Internal bridge 54 between the walls divides the housing into two parts, with formation of air chambers 55 (cavity). The profile of the lateral packer is manufactures by the co-extrusion method of two polymer materials, one of which has a hardness of at least 90 (Shore-A), while the other one has a hardness of at most 70 (Shore-A). The thickness of the plastic profile of the packer is at least 2.5 mm. The spring pulley-cable gate balancing system comprises (fig. 12) two combined vertical guides 4 of units of twin springs 56 complete with ends, the above guides located on lateral sides of the gate leaf, outside; a pair of terminal brackets for attachment of double sheaves to the wall 26, attached in conditions of manufacture to a pair of double bends of guides and two steel cables 57 fixed by means of steel thimbles on lower angular brackets 28 of lower section 58 of the gate leaf. Every unit of twin springs 56 comprises (fig. 13. 14) two coaxially arranged (the springs are located coaxially, one in the other) coiled tension springs 59 and 60, upper end 61 with a built-in double sheave and lower end 62 with a lug for fixation of the spring unit in rectangular grooves and holes of the lower part of the single vertical guide for the purpose of adjusting the tension of the spring unit. Inner spring 59 has an outer helix diameter smaller than the inner helix diameter of outer spring 60, owing to which the springs can move independently of each other, without a hazard for turns of one spring to enter gaps between the turns of the other. The outer spring is approximately 20 mm longer than the inner spring. The diameter of the springs and the diameter of the wire are selected depending on the leaf weight. Turns of the both springs have the same left-hand coiling direction in the same axial direction. The ends of the both coaxial springs forming a single spring unit are slipped and fixed on spreading stems 63 of scissor-like brackets 64 of upper 61 and lower 62 ends of the springs. Every stem has a terminal narrow fastening section with paired crooked projections (teeth) 65 for attachment of the inner spring, and, adjoining to the first fastening section on the side opposite to the springs, a wider fastening section with paired crooked projections 66 for attachment of the outer spring. The paired crooked projections on edges of stems of the scissor-like brackets interact with on-slipped helices of springs 59 and 60, thus preventing their removal. Assembling of twin coil springs with the upper and lower ends of the springs is performed simultaneously, as follows: 21 - bolted joint 67 is extracted out of the scissor-like brackets of the ends, - the stems of the scissor-like brackets of the ends of springs interconnected with a rivet with a possibility of free rotation around the rivet axis are drawn closer so that the width of the both stems would become smaller than the inner diameter of each of the springs; - the upper and the lower ends of the springs are inserted with stems of the scissor-like brackets into the twin spring (the upper end inserted on the one end of the twin spring, the lower end inserted on its other end), - with parts of ends sticking aside of the twin springs pressed upon, stems of the scissor-like brackets are spread inside the springs, the crooked projections on edges of the stems get into turns of the springs; - once the bolted joint is installed on the assembled end, the teeth of stems of the scissor-like brackets are safely fixed between the turns of the inner and the outer springs. The spring pulley-cable gate leaf weight balancing system is delivered to the mounting site complete with combined vertical guides and with a double bend of the guides. Mounting of the spring pulley-cable system consists in installation and attachment to walls of the single vertical guides, displacement of ends of cables tied down on steel thimbles, from double bends of the guides to the lower angular brackets of the lower panel of the gate leaf and adjustment of the gate leaf weight balancing. At mounting, the ends of the cables with the thimbles are fixed on double bends of the guides by means of bolts and nuts. On completion of assembling of the system of guides complete with the spring pulley-cable system and the gate leaf complete with brackets of the rollers, the leaf is raised along the guides to the upper horizontal position, the cables are taken off the double bends of the guides, fastened on the axis of the lower angular brackets and fixed with a washer and a cotter pin. Adjustment of the leaf weight balancing is exercised through displacement of the lug of the lower bracket of the spring unit along the row of rectangular grooves and holes in the lower part of the single vertical guide. The advantage of this leaf balancing system is compactness of the system, which enables to reduce the lintel dimensions (h) to 80 mm. Each of the terminal brackets for attachment of double sheaves, being assembling units, comprise (fig. 15) base 69, plate 70 and double sheave 71 fastened in parallel to the wall, interconnected with two points 72 of contact welding, axes 73 and 74, as well as fixed lock 75 of the cable loop, the said lock installed on the base of the bracket by means of a bolted joint. Each of the terminal brackets for attachment of double sheaves 26 is installed on bracket for attachment to the wall 22 of the double bend of the guides in conditions of manufacture by the method of contact or projection welding. Arrangement of double sheave 71 in parallel to the plane of abutment to the wall enables (fig. 16) to pass cable 57 fixed on the lower angular bracket inside the combined vertical guide to its outer side, where the cable is lowered vertically downwards, and the cable loop formed 22 is led to the sheave of upper end of springs 61 of unit of twin springs 56, uncoiled upwards and rises up to fixed lock 75 located on the base of the terminal bracket for attachment of the double sheave near additional axis 74 of connection of the base and the plate of the terminal bracket for attachment of the double sheave, which ensures rigidity of assembling of the terminal bracket for attachment of the double sheave, as a whole, and eliminates cantilever load from the spring unit onto the fixed lock of the cable loop. Attachment of the cable to the fixed lock is exercised by means of a pressure washer with a bolted joint. In the claimed design of the gate, for the purpose (primarily) of improving its operational safety, protection is provided (in particular, from jamming of the user's fingers) of two zones (the zone of movement of rollers along the combined vertical guide, and the spring movement zone) with moving structural elements. The complete set of long protection profile comprises (fig. 17) profile for protection of the roller motion zone 76 and profile for protection of the spring motion zone 77. Long profile for protection of the roller motion zone 76 (fig. 17 a)) has an L-section and consists of two mutually normal webs having radial conjugation. With this profile installed on the combined vertical guide, long horizontal elastic web 78 of the profile is located in parallel to the bearing surface of the combined vertical guide and serves to overlapping of space between the gate leaf and the edge (flange) of the combined vertical guide, vertical web 79 of the profile is pressed against the combined vertical guide, and rigid thrust hook 80 of the profile, thrusting against the outer surface of the edge (flange) of the profile of the combined vertical guide, ensures accuracy of positioning of the profile relative to the aforesaid guide. Teeth on the outer surface of the vertical web serve to adjusting mutual location (positioning without slippage or displacement) of the profile with the profile for protection of the tension springs (described below) in the course of mounting. Profile for protection of the spring motion zone 77 comprises (fig. 17 b)) horizontal bridge 81 connecting two staggered vertical webs 82, 83 located at its edges, these webs having radial conjugation with the bridge. At mounting, one of the vertical webs of the profile is located normally to the bearing surface of the combined vertical guide, whereas teeth 84 of the second vertical web engage with teeth applied on the outer surface of the vertical web of the profile for protection of the roller motion zone, for positioning of the profile without slippage or displacement, as well as ensuring adjustment of mutual location of the profiles. With such spatial arrangement of the profile for protection of the spring motion zone, a pocket (space between the bearing wall, the profile for protection of the spring motion zone and the outer surfaces of the combined vertical guide) is formed, where the spring is accommodated. 23 Installation of protection profiles on the mounting site is performed at the final stage of mounting and consists in slipping on (latching) and subsequent fixing of the profile for protection of the roller motion zone on the profile of the combined vertical guide, while the profile for protection of the spring motion zone is positioned on the profile for protection of the roller motion zone. For raising and lowering of the leaf, a laterally located electromechanical drive (not shown in the drawings) is used with a system for attachment of the guiding carriage of the drive to a special upper angular bracket with an adjustable roller-holder and with an adaptor for fastening of the drive rod. The gate is mounted behind the aperture inside the premises on brick masonry, concrete, steel structures, or combination of these materials, or into an aperture formed by walls of the aforesaid materials. Example 2. Fig. 18 presents a general isometric view of a roll-up gate for low lintel with a system of single guides and gate balancing mechanism 85 with torsion springs (torsion mechanism) installed on a cylinder-shaped shaft (shaft of torsion mechanism), which is fixed in terminal supporting brackets 86 installed (fig. 19) on brackets of attachment to the wall 22 of double bends of the system of guides. Here, one end of each spring, once the latter is wound up, is fastened on the shaft in a fixed way, while the other end referred to as the fixed one, is attached to a fixed support (to the wall). The gate balancing effort arises, when the springs are wound up, i.e., the springs are coiled "along the turn". Rotation of the torsion shaft exercised under the effect of elastic force of cylinder-shaped springs results in rotation of a pair of drums, on which cables for raising and lowering of the gate leaf are coiled (uncoiled). Attachment of ends of cables is exercised to the drums and to the gate leaf on the axis of the lower angular brackets. Attachment to the drums is exercised with a locking screw, which clamps the cable in a hole running through the massive part of the partition. Attachment to the gate leaf is exercised at points of suspension on axes of the lower angular brackets by means of steel thimbles. The advantage of this leaf balancing system is compactness of the system enabling to reduce the lintel dimensions (h) to 135 mm. The device for protection from break of torsion spring of torsion mechanism (hereinafter referred to as the protective device) comprises (fig. 20) two main parts: ratchet wheel 87 attached in a fixed way on the shaft of the torsion mechanism, and housing 88 attached to the wall in a fixed way, with an element of wedging into the ratchet wheel (hereinafter referred to as the latch) installed on the rotation axes jointly with the minor torsion spring. Ratchet wheel 88 has a key in the central hole and is installed on the cylinder-shaped shaft of the torsion mechanism of the diameter of 25.4 mm with a key slot and is attached in a fixed way by means of a locking screw. Housing 88 of the protective device has concentric grooves 89 for enabling movement of bolts of the fixed end 24 of the torsion spring of the torsion mechanism (hereinafter referred to as the main spring) press fitted into the housing of anti-friction bearing 90 to ensure free rotation of the spring complete with the end in case of a break of the spring, and bracket 91 with holes 92 for attachment of the housing to the terminal supporting bracket of installation of the shaft. Latch 93 jointly with minor torsion spring 94 is fastened on axis 95 of housing 88. With a device for protection from break of the main spring used, housing 88 of the device is attached to the wall in a fixed way, the fixed end of the main spring is installed jointly with pusher 96 of latch 93 on the bearing unit of the device housing so that the bolts of attachment of the fixed end of the main spring would be able to move freely around the center of the bearing within grooves 89 of the housing. The wound main spring (spring of torsion mechanism) presses the bolt head against one end of the groove, which, in its turn, rotates pusher 96, and latch 93, with special flange 97 of pusher 96, is pressed out (disengages from teeth of the ratchet wheel) from the surface of ratchet wheel 87. In case of a break of the main spring, its fixed end is relieved of the elastic force of the main spring and, under the effect of the elastic force of minor spring 94 of latch 93, rotates around the axis of bearing 90 until it stops at the opposite end of the shaft. Latch 93, under the effect of minor torsion spring 94, rotates and engages with teeth of the ratchet wheel. To unlock engagement of the latch and the ratchet wheel at repair of broken springs, latch 93 is rotated by pressing with fingers of a hand onto thrust projection 98, and its position is fixed with cotter pin 99 from spontaneous movement. After the failed spring is replaced, and the new spring is wound up, the cotter pin is removed, and the device for protection from break of spring comes to a condition of readiness for operation. The device for protection from break of spring is intended for preventing the gate from falling in case of a break of the torsion springs of the torsion mechanism with an inner diameter of 45 - 50 mm. 25

Claims

1. A system of guides of sectional roll-up gate characterized in that it consists of a pair of vertical guides combined with angular posts, situated on both sides of the aperture and intended for attachment to the wall (hereinafter referred to as combined vertical guides), each of which constitutes a single long profile with a row of grooves and/or holes in its lower part for adjustment of tension of the spring pulley-cable gate balancing mechanism, each connected by means of a double bend of the guides to the corresponding double horizontal guide, each implemented of a single long profile made up of two identical long C-section webs with guiding surfaces, the upper of which is a guide for the rollers of the upper panel of the gate leaf, while the lower one, for the rollers of the gate leaf panels, except for the uppermost one, where the double bend of the guides consists of two bends, the lower of which serves to smooth connection of the long web of the combined vertical guide to the lower web of the double horizontal guide, while the upper bend is a terminal element of the upper web of the double horizontal guide; a connecting bracket ensuring smooth connection of the bends to the webs of the double horizontal guide, and abutting with the combined vertical guide of the bracket of attachment to the wall in the form of angular profile, where in the lower part of its rib, due to its outline pattern, side walls of the profile are bent inside in such a way that the section of this profile in its lower part matches a part of the section of the profile of the combined vertical guide, where the bracket for attachment to the wall of the double bend of the guides is used for further installation thereon of a terminal bracket for attachment of a double sheave of the spring pulley-cable gate balancing system, or a terminal supporting bracket for installation of the shaft of the torsion gate balancing mechanism.

2. The system of guides according to claim 1 characterized in that each of the combined vertical guides is made composed of the lower part of a single long profile with a row of grooves and/or holes for adjustment of tension of the spring pulley-cable gate balancing mechanism, and the upper part of the single long profile of the combined vertical guide without similar grooves or holes attached to the lower part.

3. The system of guides according to claim 1 characterized in that inside long webs of single profiles of combined vertical guides and double horizontal guides, there are provided longitudinal grooves for accommodation of head of fasteners.

4. The system of guides according to claim 1 characterized in that the bearing surface of the combined vertical guide and the bracket for attachment to the wall of double bend of guides have edge flanges for installation of lateral packer.

5. The system of guides according to claim 1 characterized in that mounting of the combined vertical guide is performed jointly with double bend of the guides. 26

6. The system of guides according to claim 1 characterized in that on the lateral surface of the bracket for attachment to the wall of the double bend of guides, a hole is made for temporary fixation of the lower ends of the cable of the spring pulley-cable gate balancing mechanism.

7. The system of guides according to claim 1 characterized in that the bearing surface of the profile of the combined vertical guide is parallel to the guiding surface of the long web of the profile.

8. A sectional roll-up gate for low lintel characterized in that it comprises a bearing frame with a system of guides according to claim 1 and a horizontal crossbar installed above the upper edge of the gate; a gate leaf comprising a number of successively located and pivotally interconnected horizontal panels and movable by means of rollers located on sides of the panels between the closed and the opened positions in the system of guides, and a spring pulley-cable gate balancing system, which comprises a pair of units of twin springs installed vertically on both sides of the aperture outside the combined vertical guides, two cables with ends fixed on the respective lower angular brackets of the lower panel of the gate, and a pair of terminal brackets for attachment of double sheaves each installed on the bracket for attachment to the wall of the respective double bend of guides of the system of guides; where each of the units of twin springs consists of two coaxially arranged helical tension springs, the inner one of which has its outer helix diameter smaller than that the inner helix diameter of the outer spring, an upper end with a built-in double sheave and a lower end that is fixed in one of the grooves or holes in the lower part of the combined vertical guide, and is installed vertically outside the combined vertical guides on both sides of the aperture in such a way that the cable fixed on the lower angular bracket of the gate lower panel passes on the inner side of the combined vertical guide, enveloping the double sheave of the terminal bracket for attachment of the double sheave, to its outer side, descends forming a loop, which is led behind the sheave of the upper end of the unit of twin springs, uncoiled, is taken upwards and fixed on the terminal bracket for attachment of the double sheave.

9. The sectional roll-up gate according to claim 8 characterized in that helix springs of the unit of twin springs have the same coiling direction.

10. The sectional roll-up gate according to any of claims 8-9 characterized in that ends of the coaxial springs forming a single spring unit are slipped and fixed on spreading stems of scissor-like brackets of the upper and lower ends of the springs.

11. The sectional roll-up gate according to claim 10 characterized in that each stem of scissor like brackets has a terminal narrow fastening section with paired crooked staggered projections for attachment of the inner spring and, adjacent to the first narrow fastening section, on the side opposite to the springs, a wider fastening section with similar projections for fastening of the outer spring. 27

12. The sectional roll-up gate according to claim 8 characterized in that the end bracket for attachment of double sheaves is composed of a base with a fixed lock for a loop of the cable of the gate balancing system, a plate and a double sheave fixed in parallel to the wall plane on the axis in between.

13. The sectional roll-up gate according to claim 8 characterized in that displacement of the gate leaf panel in the system of guides is exercised by means of rollers installed with adjustment of position in three axes, in roller-holders of lateral supports of middle panels of the leaf, in roller holders of lower angular brackets of the lower panel of the leaf, in roller-holders of upper angular brackets of the upper panel of the leaf.

14. The sectional roll-up gate according to claim 13 characterized in that installation of lateral supports, upper and lower angular brackets on the gate leaf panel is performed in conditions of manufacture prior to packing of the gate.

15. The sectional roll-up gate according to claim 8 characterized in that it is additionally equipped with long profiles for protection of the roller motion zone, these profiles installed on combined vertical guides.

16. The sectional roll-up gate according to claim 15 characterized in that an L-section profile for protection of the roller motion zone comprises a horizontal elastic web, which, with the profile installed on a combined vertical guide, is positioned in parallel to its bearing surface and serves to overlapping the space between the gate leaf and the edge of the combined vertical guide, and a vertical web, which comes in contact with the flat surface of the long web of the combined vertical guide, whereas the rigid thrust hook inside the profile for protection of the roller motion zone, bearing against the outer surface of the edge of profile of the combined vertical guide, ensures accurate positioning of the profile for protection of the roller motion zone relative to the above guide, while teeth on the outer surface of the vertical web of the profile serve to its positioning without slippage or displacement relative to the profile for protection of the tension spring in the course of mounting.

17. The sectional roll-up gate according to any of claims 15-16 characterized in that it additionally comprises profiles for protection of the spring motion zone.

18. The sectional roll-up gate according to claim 17 characterized in that the profile for protection of the spring motion zone comprises two staggered vertical webs interconnected with a horizontal bridge, one of such webs positioned at mounting of the profile normal to the bearing surface of the combined vertical guide, while the teeth of the second vertical web engage with the teeth made on the outer surface of the vertical web of the profile for protection of the roller motion zone. 28

19. The sectional roll-up gate according to claim 8 characterized in that the plane of horizontal's crossbar joining the wall, the bearing surface of the combined vertical guide and the bracket of attachment to the wall of a double bend of guides of the system of single guides have edge flanges for installation of lateral packer.

20. The sectional roll-up gate according to claim 19 characterized in that the lateral packer comprises a lock part formed with two brace webs, a hollow housing and a soft lug.

21. The sectional roll-up gate according to claim 8 characterized in that a chain ceiling electric drive is used made up of an electric motor and a remote control unit.

22. A sectional roll-up gate for low lintel characterized in that it comprises a bearing frame with a system of guides according to claim 1 and a horizontal crossbar installed above the upper edge of the aperture, a gate leaf comprising a number of successively located and pivotally interconnected horizontal panels and movable by means of rollers located on sides of the panels between the closed and the opened positions in the system of guides, and a gate balancing system, which consists of a torsion mechanism comprising a shaft installed in bearings fixed on angular posts of terminal supporting brackets, this shaft having at least one torsion spring, one of its ends fixed on the shaft and rotating with the shaft, its other end attached in a fixed way to the wall with an inner supporting bracket and having a pair of drums fixed rigidly on its ends, which, with the shaft rotating, has a cable fixed on the bottom angular bracket of the gate leaf being coiled thereon, and a pair of terminal supporting brackets of installation of the shaft of the torsion mechanism, each fixed on the bracket for attachment to the wall of the respective double bend of the system of guides.

23. The sectional roll-up gate according to claim 22 characterized in that it is additionally equipped with a device for protection from spring break, which consists of a housing, which features concentric grooves for enabling movement of bolts of the fixed end of the torsion spring of the torsion mechanism, an anti-friction bearing press-fitted into a housing for free rotation of the spring complete with its end in case of the spring break, and a bracket for attachment of the housing to a terminal supporting bracket of the shaft installation; a torsion mechanism of a ratchet wheel installed on the shaft in a fixed way, as well as a housing of an element for wedging into the ratchet wheel installed on the rotation axis jointly with a minor torsion spring, the aforesaid housing attached to the wall in a fixed way.

24. The sectional roll-up gate according to any of claims 22-23 characterized in that displacement of the gate leaf panels in the system of guides is exercised by means of rollers installed with adjustment of position in three axes in roller-holders of lateral supports - for rollers of middle panels of the leaf, in roller-holders of lower angular brackets of the lower panel of the leaf 29 for rollers of the lower panel, in roller-holders of upper angular brackets - for rollers of the upper panel of the leaf.

25. The sectional roll-up gate according to claim 24 characterized in that installation of lateral supports, upper and lower angular brackets on the gate leaf panel is performed in conditions of manufacture prior to packing of the gate.

26. The sectional roll-up gate according to any of claims 22-23 characterized in that it is additionally equipped with long profiles for protection of the roller motion zone, these profiles installed on combined vertical guides.

27. The sectional roll-up gate according to claim 26 characterized in that an L-section profile for protection of the roller motion zone comprises a horizontal elastic web, which, with the profile installed on a combined vertical guide, is positioned in parallel to its bearing surface and serves to overlapping the space between the gate leaf and the edge of the combined vertical guide, and a vertical web, which comes in contact with the flat surface of the long web of the combined vertical guide, whereas a rigid thrust hook inside the profile for protection of the roller motion zone, bearing against the outer surface of the edge of profile of the combined vertical guide, ensures accurate positioning of the profile for protection of the roller motion zone relative to the above guide.

28. The sectional roll-up gate according to any of claims 22-23 characterized in that the plane of horizontal's crossbar joining the wall, the bearing surface of the combined vertical guide and the bracket of attachment to the wall of a double bend of guides of the system of single guides have edge flanges for installation of lateral packer.

29. The sectional roll-up gate according to claim 28 characterized in that the lateral packer comprises a lock part formed with two brace webs, a hollow housing and a soft lug.

30. The sectional roll-up gate according to any of claims 22-23 characterized in that a chain ceiling electric drive is used made up of an electric motor and a remote control unit. 30