SU883842A1

SU883842A1 - Device for automatic clamping and attachment of film to the core

Info

Publication number: SU883842A1
Application number: SU802898210A
Authority: SU
Inventors: Абрам Яковлевич Куперман; Леонид Григорьевич Тарасенко
Original assignee: Всесоюзный Научно-Исследовательский Кинофотоинститут
Priority date: 1980-03-14
Filing date: 1980-03-14
Publication date: 1981-11-23

Description

1one

Изобретение относитс к кинотехнике и может найти применение в киноаппаратах , а также других видах аппаратов , предназначенных дл транспортиров&ни лент (магнитофонах, программных устройствах и т.п.) , где требуетс разматывание и наматывание киноленты или ленты в рулон.The invention relates to film technology and can be used in cinematographic devices, as well as other types of devices designed for transporters & tapes (tape recorders, software devices, etc.) that require unwinding and winding of films or tapes into a roll.

Известны устройства дл автоматического захвата и закреплени киноленты на сердечнике, содержащие самоэахватывающие бобины с эластичными лепестками в ребордах 1.Devices are known for automatically capturing and fixing films on a core, which contain self-retaining reels with elastic lobes in the flanges 1.

ОднакЪ в цеп х упрощени и удешевлени конструкции сгцлоэахватывающих бобин эластичные лепестки и реборды обычно выполн ют из одного и того же материала (лепестки прорезают в материале реборды). Это приводит к необходимости выбора материала и толщины реборд, совмещгиоших в себе противоречивые качества - жесткость, необходимую дл}1 удержани рулона при намотке, и эластичность, необходимую дл правильного функционировани лепестков , вследствие отсутстви подобного материала выбирают материал и толщину ребордне слишком жесткие и не слишком эластичные, что снижает над ность функционировани бобин.However, in the chains of simplifying and reducing the cost of the construction of reel-retaining reels, elastic petals and flanges are usually made of the same material (petals are cut through in the flange material). This leads to the need to choose the material and thickness of the flanges, combining contradictory qualities - stiffness necessary to hold the coil during winding, and elasticity necessary for proper functioning of the petals, due to the absence of such material, choose the material and thickness of the edge too hard and not too elastic, which reduces the super functioning of the reels.

Выполнение реборд и эластичных лепестков из разных материалов или разной толщины хот и возможно, но на практике не примен етс из-за существенного удорожани конструкции бобин при крупносерийном производстве.Making flanges and elastic petals from different materials or different thicknesses, although possible, is not used in practice because of the significant increase in the cost of the construction of reels for large-scale production.

Наиболее близким по технической сущности к предлагаемому вл етс устройство автоматического -захвата и закреплени киноленты, выполненное в виде жестко св занного с наматывателем откидного пальца, который в момент захвата под действием специального кулачка проникает внутрь петли киноленты и прижимает ее к выемке в сердечнике бобины Г2.The closest in technical essence to the present invention is a device for automatic gripping and fixing of a film, made in the form of a folding finger rigidly connected to the winder, which at the time of gripping under the action of a special cam penetrates the loop of the film strip and presses it to the notch in the core of the G2 reel.

Однако это устройство пригодно только дл захвата петли пленки в специальных бифил рных бобинах, имеющих выемку в сердечнике, и не может быть использовано дл .автоматического захвата начала или конца киноленты при обычной однослойной ее намотке .However, this device is only suitable for capturing a loop of a film in special biphilic bobbins that have a notch in the core, and cannot be used to automatically capture the beginning or end of a filmstrip with its usual single-layer winding.

Целью изобретени вл етс расширение функциональных возможностей и повышение надежности работы.The aim of the invention is to enhance the functionality and increase the reliability of operation.

Указанна цель достигаетс тем, что механизм захвата выполнен в видеThis goal is achieved by the fact that the capture mechanism is made in the form

Claims

30 rigidly connected with the shaft of a winder is a disk on which axles are mounted spring-loaded cams entering the holes of the flange, areas of the cam contacting the film strip are made thickened, and the surface is made of a material with an increased coefficient of friction. Figure 1 shows the reel of the camera with the device for automatic capture and fixing of films on the core of the reel, front view} in figure 2 - section AA in figure 1. The device contains six moving elements - cams 1, having turning axes 2, fixed on disk 3, coaxially and rigidly fixed on shaft 4 of the reamer. An easily removable bobbin 5 is mounted on the shaft 4, which is rotated from the shaft 4 by means of a finger b fixed in the flange 7. The axle 8 is prevented from rotating the bobbin 5, which rotates 90 ° if the bobbin 5 is to be removed. The 2 ends of the cams 1 have springs 9 which force the cams 1 against the flange 7, thus neutralizing the pressing effect of the weight of the cam 1. The force of each of the springs 9 can be independently adjusted with screws 10. A reel 5 is mounted on the shaft 4 in this way h then the holes 0 in the flanges 11 are located against the cams 1, which enter through these holes into the inside of the reel 5. If the reel between the flanges 5 ends, the beginning or loop of the reel 12, one or more cams 1 automatically press it to the opposite edge 11 of the reel 5 and as the reel 5 rotates, the film is transported to the D2 film a. Since the speed of the roller shaft 4 of the reel is usually calculated for a certain excess of the feed speed of the film 12, the captured reel of 5 kinolenTa 12 pulls up and after one or several rothé outer coil (or the outer coils) automatically filmstrip 12 will press and secure the inner vito m to the core 13 of the bobbin 5. In this case the cams about axes povernuts 1 and 2 will no longer be in contact with the winding turns of the filmstrip 12 is not a mesh roll forming process. In order to avoid damage, crushing the end of the tape 12 is its force. Primary to flange 11, developed by cam 1, should be relatively not large and stable. Spring 9 is a structural element that does not provide long-term stability. Therefore, in this device, along with the springs 9, the centrifugal force developed by the cams 1 during the rapid rotation of the reel with an empty reel 5 is used to press the film 12 to the flange 11. For this, the shape of the cam 1 selected thickened at the end remote from the axis 2. The action of the centrifugal force arising from the rotation of the shaft 4 of the reel and the cams 1 is similar to the action of the springs 9, which allows them to be unloaded or further to refuse to use them altogether. In order to reduce the required clamping force of the film 12 to the flange 11, the 12 sections & The cams 1 can be provided with a surface with a high coefficient of friction relative to the film strip 12, for example, a notch, a roughness or covered with rubber. The proposed device can be used in a cinema camera for one or two layer winding of a film, and allows automating the operation of capturing and fixing a film on the core of a reel when using conventional bobbins, i.e. designed for universal use. Apparatus of the Invention A device for automatically grabbing and fixing a film on a core containing a receiving reel with flanges mounted on a winding shaft rigidly connected to the gripping mechanism, characterized in that, in order to extend the functionality and increase the reliability of the gripping mechanism, the form of a disk coil rigidly connected with the shaft, on which axle-mounted cams mounted in the flange holes are mounted on the axles. 2. The device according to claim 1, about tl and which is so that the sections, the cams in contact with the film: (the ento is made thickened, and their surface is made of a material with a high coefficient of friction. Source information taken into account during the examination 1. US Patent No. 3,591,102 ,, CL 242-74, published 1971,

2. US patent number 3592402 ,, class. 242-55.16, published. 1971 (prototype).

IPsz.f A-A

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