SU661098A1 - Device for raising shutter gate - Google Patents

Description

The invention relates to the construction, in particular to devices for lifting curtain gates, used for closing openings of industrial buildings and other structures. A device for lifting the door leaf is known, which contains a drum, a cable-blocking system, a connecting fabric, a counterweight sheet and guides 1. A disadvantage of the known device is that it does not allow balancing of the fabric in intermediate positions. the design of the cable system. Another device for lifting a curtain gate is known, comprising a drum with a curtain wound around it, a supporting rope connecting the drum with a counterweight consisting of several sections and guides 2. This device is closest to the proposed invention in its technical essence and achieved result. Its disadvantage is the complexity of the construction of the cable-block system. The aim of the invention is to simplify the construction and the reduction of the dimensions of the device. This goal is achieved in that the device for lifting the curtain gate comprises a drum with a curtain wound around it, a supporting rope connecting the drum with a counterweight consisting of several sections and guides. The sections are provided with shock absorbers and are coaxially mounted in height on the limiters made on the guides, while the end of the rope is fixed on the lower section, and the shock absorbers are equipped with stops that interact with the end of the upstream section. FIG. 1 shows the proposed device in the open position; in fig. 2 - section AA on. 1: in FIG. 3 - view B of FIG. 1. A device for lifting a curtain gate comprises a drum 1 with a tongue 2 wound on it, a supporting rope 3, connecting a drum with a counterweight 4. consisting of several sections 5, and guides 6.

With usscin 5, they are provided with shock absorbers 7 Is coaxially mounted in height on the limiters 8 with the ability to move along guides under the action of the lower section, in which the end of the rope 9 is fixed, while the two lower sections have grooves 10 that allow these sections to move past all upstream limiters.

The shock absorbers 7 are provided with stops 11, which interact with the ends 12 of the upstream section, and the guides are provided with a bar 13, limiting the upward movement of the raised sections.

Device d.1 lifting the curtain gate works as follows.

When the curtain gate is raised, the curtain 2 is wound with ia drum 1, from which a small part of it hangs. The support rope 3 is unwound from the drum 1 and pulled under the action of the weight of the lower section 5. All sections 5 of the counterweight 4 are mounted coaxially in height on the stoppers 8 and are in the 3 lowest position.

The moment created by the drum pa 1 with a small hanging part of the curtain 2 is balanced by the moment created by the mass of the lower section 5 of the counterweight 4.

To lower the curtain gate, the drum is rotated, as a result of which the winding 2 is unwinding, and the moment it creates on the drum increases in direct proportion to the length of the unwound part of the curtain 2.

Simultaneously with the unwinding of the curtain 2, the nPO1 rolls onto the reel of the supporting rope 3, lifting up the lower section 5 of the counterweight 4, the shock absorber 7, which, abutting against the stretched section 5, begins to compress, as a result, an additional force will act on the lower section 5, however, the moment created by the counterweight will increase.

Upon further winding of the supporting rope 3 onto the reel, both sections 5 slid along the guides m 6 upward, the shock absorber 7 of the second section 5 abutting the upstream section 5 being compressed, and onto the supporting rope 3 begins to be transmitted through the lifting sections 5 additional force, similar to that which acted at the beginning of the rise in compression of the shock absorber 7 of the lower section 5.

After the final deployment of the curtain 2, all sections 5 are lifted from the stops 8, and the upper section 5 rests on the rail 3 of the rails. The masses of all sections create a balancing moment equal to the moment created on the drum 1 by the fully deployed tongue 2, which will also be in a balanced state.

This device provides balancing curtains at intermediate positions and is characterized by simplicity, since it has a minimum number of elements that are kinematically connected to each other.

Claims (2)

Invention Formula A device for lifting a curtain gate comprising a drum with a curtain mounted on it, supporting a roller, connecting the drum with a counterweight consisting of multiple sections, and guides, characterized in that, in order to simplify the construction and reduce the size, the section was modified shock absorbers and coaxially mounted in height on the limiters, made on the guides, while the end of the rope is fixed on the lower section, and the shock absorbers are equipped with stops, interfacing. with the end of the upstream section. Sources of information taken into account in the examination . U.S. Patent 3,460,601, Cl. 160-168, 1969. 2. For the number 2359734 / 29-33, cl. F. 06 In 31/44, 1976, according to which the decision to issue an author's certificate was made.