SU679843A1

SU679843A1 - Staircase testing device

Info

Publication number: SU679843A1
Application number: SU782577014A
Authority: SU
Inventors: Аркадий Михайлович Журавлев; Анатолий Сергеевич Старцев; Зоя Ивановна Морозова
Original assignee: Войсковая часть 51105
Priority date: 1978-02-06
Filing date: 1978-02-06
Publication date: 1979-08-15

Description

(54) УСТЮЙСТВО ДЛЯ ИСПЫТАНИЯ ЛЕСТНИЦ(54) APPARATUS FOR TESTING LADDERS

1one

Изобретение относитс к области изучени упругих свойств и может быть применено дл испытани лестниц статическим нагружением.The invention relates to the field of studying elastic properties and can be applied for testing stairs by static loading.

Известен стенд пл испытани тетив пожарных лестниц на прочность, содержащий раму, оснащенную тележками с блоками, через которые проходит трос, наматываемый на барабан лебедки, прочно закрепленной на основании 11 The stand stand is known for testing the strength of fire escape ladders for fire, containing a frame equipped with carts with blocks through which a cable passes, which is wound on a winch drum, firmly fixed on the base 11.

Стацион фный стенд требует специально орудованной площадки с фундаментом, и его нерадаонапьно содержать в услови х, когда ограничено число объектов испытаний.The stationary stand requires a specially equipped platform with a foundation, and it must not be maintained in conditions when the number of test objects is limited.

Наиболее близким техническим рещением к изобретению вл етс устройство дл испытани лестниц, включающее в себ силовое приспособление , соединенное с лестницей посредством траверсы 2.The closest technical solution to the invention is a ladder testing device, which includes a power device connected to the ladder by means of a traverse 2.

Известное устройство требует стационарного креплени отдельных элементов оборудовани при создании испытательной нагрузки на тетивы лестниц, периодического ее освидетельствовани , ве позвол ет фиксировать контрольные нагрузки, нуждаетс в переналадке дл различных обьектов испытани и их элементов.The known device requires stationary fastening of individual elements of the equipment when creating a test load on the strings of the stairs, periodically examining it, allows you to fix test loads, needs retooling for various test objects and their elements.

Цель изобретени - повышение производительности испытаний.The purpose of the invention is to increase test performance.

Цель достигаетс тем, что в устройстве дл испытани лестниц, включающем в себ силовое приспособление, соединенное с лестницей посредством траверсы, траверса снабжена блоком, а снловое приспособление выполнено в виде тележки с лебедкой и секци ми дл груза и снабжено тросом, причем один конец троса закреплен на тележке, а другой пропущен через блок траверсы , и закреплен на барабане лебедки.The goal is achieved by the fact that, in the ladder testing device, which includes a power device connected to the ladder by means of a traverse, the traverse is equipped with a block, and the removal device is made in the form of a trolley with a winch and sections for cargo and equipped with a cable, with one end of the cable secured on the cart, and the other is passed through the traverse block, and mounted on the winch drum.

На чертеже изображено предлагаемое устройство .The drawing shows the proposed device.

Устройство содержит тележку 1, секдни 2, грузы 3, траверсу 4, ручную лебедку 5, соедин ющий элемент 6 с блоком 7, рам-болт 8.The device comprises a trolley 1, a second 2, a load 3, a yoke 4, a hand winch 5, connecting element 6 with a block 7, a frame bolt 8.

Claims

The cart is made in the form of a platform with wheels 9 and is equipped with a handle. Sections are rigidly fixed on the trolley platform. The weights are made in the form of lamellar blocks, equipped with races 10, with the help of which they are fastened to the cargo traverse with the fingers I. The fingers have their elements fixed at the ends. During the test, the trolley 1 is fed to a ladder 12 arranged horizontally on supports at the ends or standing at an angle of 75. A connecting element 6 is fastened to the test element of the ladder, through block 7 of which passes a cable wound onto the winch drum. The free end of the cable is secured with the help of the tire by means of the tire. The frame-bolt 8 is attached to the cross beam. With the help of fingers 11, a set of weights is connected that corresponds to the test load. The weights are arranged symmetrically in a vertical plane passing through the axis of block 7. Rotation of the handle, i.e. winding a cable onto the drum, lifts the weights and loads the test element of the ladder. The coiling of the cable is completed after the goods are taken off the platform of the trolley and the static deflection of the test element of the ladder has been completed. The winch gearbox is made in the form of a self-braking worm gear, therefore, when force is removed from the winch handle, the load remains in the well-known state. The winch allows lifting and lowering loads of up to 200 kg with a handle force of up to 15 kg. The height of the sections for cargo is chosen so as to exclude the output of cargo from the cells under loading. This ensures the safety of work in case of destruction of the test object. Thus, the introduction of a block on a traverse and a power device made in the form of a trolley with a winch and sections for cargo and equipped with a cable attached to the winch to the device’s prediction increases the test performance of various ladders, as it allows to simply and reliably apply and fix the test load without the use of permanently fixed nodes and equipment changeover. The invention The device for testing the stairs, which includes a power device connected to the ladder with a polemouth traverse, is required in order to increase the performance of the test, the traverse is equipped with a block, and the power device is made in the form of a trolley with a winch and sections for cargo and is equipped with a cable, with one end of the cable attached to the trolley, and the other passed through the traverse unit and mounted on the winch drum. Sources of information taken into account during the examination 1. USSR author's certificate No. 127058, cl. G 01 M 5/00, 3959.

2. USSR author's certificate number 136582, cl. G 01 M 5/00, 1959.