SU747797A1 - Bobbin for winding an endless tape - Google Patents

Description

The invention relates to kinotekhnika, in particular to devices for winding an endless tape, intended for use in film projectors, in sound reproducing devices, as well as in devices that require continuous transportation of tape material with recorded information on it. Reels are known for continuous bifillary (two-layer) winding, unwinding and rewinding of an endless belt, which automatically release or grip and secure the film to the core of the film loop without crushing it. Among them are known reels with a flap engaging palatin installed on the core l. The use of bifilar double-layer winding is advisable mainly for a full film glued into a ring. But the length of a modern full-length even of a single-series 35 m movie often reaches 3000 m, CHC requires the use of bifilary reels with a diameter of almost 1 m. devices for continuous bifilar winding with two meter reels in conventional cinema hardware is very difficult. In addition, a feature of the bi-filar winding principle is the contacting of the lacquer layers of the film at adjacent turns in a roll. If there is a photographic phonogram in the film copy (in 35 mm and in the majority of 16 mm film copies) this feature does not cause any signs. However, in the case of magnetic phonogram application (70 mm, some 16 mm and most 8 mm film prints), the contacting of lacquer layers with magnetic tracks applied to the EMX can lead to a deterioration in the quality of the magnetic phonogram due to the so-called copier effect. This reason, obviously, prevents the use of bifilar winding for tape-shaped magnetic information carriers, for example, in tape recorders, film phonographs. The closest technical solution to the proposed invention is a device for two-wire winding of a film glued into a ring, in which the winding and rewinding branches of the film are wound not into one, but in two parallelly located on the same shaft of the roll 2.

In this device, the reel for two-row winding of tapes contains four flanges and a pivot arm with several hinges located between two inner flanges with a shaped notch that attaches a film loop to the core of the reel.

The double bottom winding of the film stuck together in a ring makes it possible to reduce the diameter of the reels by about 1.5 times and eliminate the contact between the lacquer layers of the next turns of the film in the roll.

However, the known structure of both the reel and the device for automatic continuous winding of the tape is extremely complex and requires film movement in many planes. In addition, the need to automatically control the operation of the lever that grips and secures the loop of the film and also the movement of the film in several planes reduces the reliability of the device.

The aim of the invention is to simplify the construction of the reel and its operation.

This goal is achieved by the fact that the engagement device is made in the form of pins arranged perpendicular to the core axis, mounted between the individual elements forming the core supporting surface; the individual elements forming the core supporting surface are fixed on the flanges located on the outer sides of the winding zones, and the engagement pins are fixed on the sleeve, the core in the cross section is star-shaped, and the individual elements forming the core supporting surface coincide with the vertices of its rays.

FIG. Figures 1 and 2 show the construction of a reel in two projections; in fig. 3 - the same, axonometrics (two-bottom winding and unwinding); in fig. 4 - design of a reel with a star-shaped core; in fig. 5 is a diagram of an automatic continuous two-wire winding device in which the proposed reel is used; in fig. 6-15 - various phases of operation of the device shown in FIG. five.

The proposed reel for a two-winding winding comprises two flanges 1 and 2, a core 3, the bearing surface of which consists of separate el1) 1e toes, formed by pins, and a sleeve 4. The individual elements are rigidly connected to the flanges 1 and 2 (Fig. 1 and 2) The sleeve 4 is provided with a central hole a for inserting a reel onto a coiler shaft or a braking device (not shown), as well as one or more finger holes b (not shown) rigidly connecting the reel to the shaft .

The distance between the flanges 1 and 2 is more than two times the width of the material 5 wound on the reel, and in the middle between the flanges 1 and 2 in the plane perpendicular to the axis of the middle bar 3, there are radially located three hooks 6 dividing the space between flanges 1 and 2 into two zones for winding rows. The width of each winding zone is between the flange 1 and the pin b and between the pin b and the flange

2 approximately corresponds to the width of the belt 5, so that the winding and unwinding of the belt 5 can be done in two rows. FIG. 3 solid arrows indicate the direction of winding, dotted - the direction of unwinding of the tape 5.

The pins 6 serve to grip the loop of the tape 5. In order that the loop of the tape 5 captured by the pin b will not deform and do not interfere with the subsequent winding of two parallel rolls, it is advisable to place the engaging pins 6 between the core 3 pins. into the hollow between the pins of the core 3. The simplified construction of the reel (Fig. 4) with the conventionally removed flange 1 is characterized in that the core

3 in the section has the shape of a star, the tops of which coincide with separate sections of the bearing surface of the core 3 and in the cavities of which the engaging pins 6 are fastened. A similar design of the reel is more convenient for manufacturing by pressing from a plastics mat.

The tape 5 (Fig. 5 and 6), unwinding from the reel 7, passes through the film projector 8 and the drum 9 through the input guide rollers 10 is fed to the reel 11. The winding of the tape 5 by the reel 11 and its unwinding from the reel 7 are made from rolls 12 and 13 in the same plane. Rolls 14 and 15, which are conventionally shown in smaller diameters, located in a different plane serve to rewind tape 5 (by means of the F branch), which occurs simultaneously with unwinding-winding. The drum 9 and the input guide rollers 10 are mounted on the carriage 16. The output guide rollers 17 are on the same carriage 18.

Claims (2)

At the end of the unwinding and the tape 5 from the rolls 13 and 15, a phase occurs (FIG. 7), which shows the engaging pin of the reel 7 of the gripped loop of the tape 5. After winding this loop onto the reel 11, the phase shown in FIG. 8. To avoid skewing the unwinding branch of the tape 5, the carriage 18 with the output rollers 17, and with it the yoke 16 with the input rollers 10 at this moment, progressively move perpendicular to the drawing plane in the direction of the reader. from the roll 14, on the reel 11, and the ribbon 5 coming in through the input rollers 10 forms a spatial free loop P, as shown in FIG. 9. One of the radial pins 6 of the reel 7 when it rotates automatically engages with the spatial loop P, and starts winding the tape 5 onto the reel 7 with two rows (figure 10). After winding several turns, the phase shown in FIG. 1 is symmetrical to the phase shown in FIG. 6. The phase difference in FIG. 11 is that the unwinding of the tape 5 occurs from the roll 14 on the reel 11, and the winding of the tape 5 is carried out in the roll 15 on the reel 7, 14 c is in the same plane. The tape 5 is rewound from roll 12 to roll 13, also located in the same plane. The operation of the device in the subsequent phases of FIG. 12-15 is also symmetrical to the corresponding phases of FIG. 7, 8, 9 and 10, however, the movement of the carriages 16 and 18 with the rollers 10 and 17 in the phase shown in FIG. 13, opposite to those indicated in the phase in FIG. 8. Obviously, instead of moving the carriages 16 and 18 with the rollers 10 and 17 forward, a similar translational movement can be given to the reels 7 and 11 themselves, which also eliminates the distortion on the winding and unwinding branch x tapes 5. The reel design described above facilitates the introduction of ring stores for fully automating cinema installations at cinema installations, J (L) tops show full-length, X & M / films, and fully automate cinema installations and sound reproduction roystva (tape, filmofonografy) using magnetic track. Claim 1. Bobbin for winding an endless belt containing flanges, sleeve and core with two zones on the supporting surface for parallel winding of tape, between which is placed an engaging device, characterized in that, in order to simplify the design of the reel and its operation, the hooks The device is made in the form of pins arranged perpendicular to the axis of the core and installed between the individual elements forming the core supporting surface. 2. Bobbin POP.1, characterized in that the individual elements forming the bearing surface of the core are fixed on the flanges located on the outer sides of the winding zones, and the engaging pins are fixed on the sleeve. 3. Bobbin POP.1, characterized in that the core in cross section has the shape of a star / and the individual elements forming the bearing surface of the core coincide with the vertices of its rays. Sources of information taken into account in the examination 1. The author's certificate of the USSR No. 209967, cl. B 65 N 75702, 1966. 2. US patent number 3981571, cl. 352-125, 1976 (prototype). S. 9 Fig.p