SU1543377A1

SU1543377A1 - Device for regulation of film tension

Info

Publication number: SU1543377A1
Application number: SU884428937A
Authority: SU
Inventors: Владимир Васильевич Павлин; Владимир Арсентьевич Скоморох
Original assignee: Предприятие П/Я В-8450
Priority date: 1988-05-23
Filing date: 1988-05-23
Publication date: 1990-02-15

Abstract

Изобретение относитс к оптическому приборостроению и позвол ет повысить надежность устройств, предназначенных дл регулировани нат жени пленки. Устройство содержит установленные параллельно друг другу на одной оси и жестко св занные между собой два рычага 1, 5, на концах которых размещены прижимной ролик 2 и подпружиненна тормозна колодка 7, причем на рычаге 1 установлен направл ющий ролик 9. Рычаги 1, 5 поджимаютс к оси катушки 4 пленкой 3 путем охвата ею направл ющего ролика 9. Во врем сматывани пленки 3 с катушки 4 тормозна колодка 7 контактирует с фланцем 6 катушки 4, а прижимной ролик 2 контактирует с рулоном пленки 3. Усилие прижима колодки 7 к фланцу 6 посто нно, а радиус их взаимодействи мен етс синхронно с радиусом рулона пленки 3, нат жение которой также посто нно, причем усилие прижима ролика 2 к рулону частично компенсируетс силой трени колодки 7 о фланец 6. 1 з.п. ф-лы, 2 ил.The invention relates to optical instrumentation and improves the reliability of devices designed to control the tension of the film. The device contains two levers 1, 5 rigidly interconnected on one axis and parallel to each other, on the ends of which a pressure roller 2 and a spring-loaded brake shoe 7 are placed, and a guide roller 9 is mounted on the lever 1. The levers 1, 5 are pressed to the coil 4 axes with film 3 by engaging the guide roller 9. While winding the film 3 from the coil 4, the brake shoe 7 contacts the flange 6 of the coil 4, and the pressure roller 2 contacts the film roll 3. The pressing force of the shoe 7 to the flange 6 is constant and the radius of their interaction The action varies synchronously with the radius of the roll of film 3, the tension of which is also constant, and the pressure of the roller 2 against the roll is partially compensated by the force of friction of the pad 7 against the flange 6. 1 Cp f-ly, 2 ill.

Description

/А /BUT

LL

Claims

Claim

1, A device for controlling the tension of the film, containing a coil with a flange, as well as two levers rigidly connected to each other and located in the same plane on an axis mounted in the housing, at the end of the first of which there is a pressure roller, and at the end of the second lever. a spring-loaded brake shoe is installed, 'and a lever clamping means, which, in order to increase reliability, the levers are parallel to each other, and the pressure roller and spring-loaded brake shoe are placed on straight lines parallel to the axis levers, while the spring-loaded brake shoe contacts the flange.

2. The device according to claim 1, wherein the means for pressing the levers is made in the form of a guide roller mounted on the first lever.