JPH09329853A - Film traveling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film traveling device by which a video film is easily and accurately loaded while following a film traveling path and also adequate traveling tension is loaded on the film, so that the film can travel in a stable condition with respect to a sound drum. SOLUTION: The video film 2 is loaded along a path display 45 provided on a front surface plate 42 while following an actual film traveling path. A detection piece 40 is integrally and protrudingly set on the side edge part of a tension lever 30 whose one end is turnably supported to a substrate 4c in cantilever, and performs turning operation in accordance with traveling tension with respect to the film 2. The film 2 is adjusted to adequate traveling tension and loaded while corresponding to a pointer 41 provided on the piece 40 and facing to the display window 43 of the plate 42 and an index provided on the plate 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film running device for running a video film, and more particularly, a running tension load for displaying a state of running tension applied to a video film mounted along a film running path. The present invention relates to a film traveling device including a mechanism.

[0002]

2. Description of the Related Art In recent movie systems, so-called digital sound projection systems have been adopted which have achieved not only analog sound but also digital sound to achieve better sound quality and stereo sound to enhance the sense of presence. There is. The video film for this digital sound projection system is provided with a digital sound signal recording section together with an analog signal recording section, and these analog sound signal recording section and digital sound signal recording section constitute a sound signal recording section. . This digital sound signal is reproduced by the digital sound signal reproducing device 100 shown in FIG.

The digital sound signal reproducing apparatus 100 is
Located in front of the projection unit, attached to the digital projection device,
As shown in FIG. 7, a first guide roller 103 to a sixth guide roller 108, a guide sprocket 109, and a sound drum, which form a film traveling path of the image film 102 supplied from the image film supply / rewinding device. 110, a first tension roller 111, a pair of second tension rollers 112 and 113, and a pair of third tension rollers.
And tension rollers 114 and 115.

The first tension roller 111 is arranged at the rear stage of the supply-side guide roller 104, and a predetermined tension is applied to the supplied image film 102 to guide the guide sprocket 10 through the guide roller 105.
Drive to 9. Second tension roller 112, 1
The reference numeral 13 is arranged at a position symmetrical with respect to the guide sprocket 109, and the image film 102 is pressed against the peripheral surface of the guide sprocket 109 to run. The third tension rollers 114 and 115 are disposed between the guide sprocket 109 and the sound drum 110 and are arranged one above the other, and the third tension rollers 114 and 115 are disposed above and below the sound drum 110.
A predetermined traveling tension is applied so that the 02 travels in a stable state.

The digital sound signal reproducing device 100 is additionally provided with an optical reading device 120 and a light source device 123 for reproducing a digital sound signal provided on the video film 102. The optical reader 120 is
Although not described in detail, the objective lenses 121 and C are disposed so as to face the sound drum 110 and have their optical axes aligned with each other.
And a CD sensor 122. The light source device 123 is
Although not described in detail, the image film 102 is disposed on the sound drum 110 side, and the light source and the reading light emitted from the light source are run around the outer periphery of the sound drum 110.
It is equipped with an optical fiber that leads to the digital sound signal recording unit. The tip of the optical fiber is aligned with the optical axes of the objective lens 121 and the CCD sensor 122.

Further, the digital sound signal reproducing device 10
In No. 0, an operation guide piece 125 is provided on a part of the main surface for explaining the procedure for engaging the image film 102 between the guide rollers and the tension roller described above. Therefore, in the digital sound signal reproducing device 100, according to the procedure displayed on the operation guide piece 125,
The image film 102 is formed by the guide rollers 103 to 10
8, the tension rollers 111 to 115, the guide sprocket 109, and the sound drum 110 are mounted on the film running path. The video film 102 is driven to run along a film running path that is substantially laterally concave.

According to the digital sound signal reproducing apparatus 100 configured as described above, the guide sprocket 10 is used.
By rotating 9 in the counterclockwise direction in FIG. 7, the mounted image film 102 is driven to run. When the video film 102 goes around the outer periphery of the sound drum 110 approximately halfway, the light source device 123 emits the reading light to the digital sound signal recording portion. The reading light is transmitted through the encoded digital sound recording unit and is read by the optical reading device 120 to reproduce the digital sound signal.

[0008]

By the way, the above-mentioned conventional digital sound signal reproducing apparatus 100 is provided in front of the projection section and the analog signal reproducing section, is attached to the digital projection apparatus, and is provided on the video film 102. Play the digital sound signal. Further, in the digital sound signal reproducing apparatus 100, the tension rollers 111 to 115 apply a predetermined traveling tension, so that the video film 102 is stably traveling with respect to the sound drum 110.

If the video film 102 is run under an excessive running tension, problems such as damage or deformation of perforations or scratches on the film surface occur. Also, the video film 102
When the vehicle is run under the condition that the proper running tension is not applied, the sound drum 110 is not stably multiplied, so that a problem that an accurate digital sound signal is not reproduced occurs. Will end up.

Further, in the conventional digital sound signal reproducing apparatus 100, the image film 102 is mounted according to the procedure displayed on the operation guide piece 125, but the size difference from the display is remarkably different, and the image film 102 is also different. It was hard to understand the film travel route due to the routing. Therefore, in the conventional digital sound signal reproducing apparatus 100, it takes time to mount the video film 102 and it may be erroneously mounted.
Therefore, the image film 102 is not properly driven and driven, or it is sandwiched by guide rollers or the like to cause damage or damage to the film surface, or various problems such as damage or deformation of perforations occur. There was something to do.

Therefore, the present invention has been proposed in order to solve the above-mentioned conventional problems. The image film can be easily and accurately mounted according to the film traveling path, and the image film can be properly used. It is an object of the present invention to provide a film traveling device which is loaded with traveling tension and can be stably traveling with respect to a sound drum.

[0012]

In order to achieve the above-mentioned object, a film traveling apparatus according to the present invention is a film traveling guide means which constitutes a traveling path of a video film, and a film traveling guide means for traveling by being interlocked with the film traveling guide means. A running tension load mechanism is provided to apply running tension to the video film. In the traveling tension load mechanism, one end of the tension lever is rotatably supported on the substrate by a cantilever, a tension roller is rotatably supported on the other end of the tension lever, and the tension roller is used as an image film. It is composed of elastic means for urging the tension lever in the pressing direction and a detection piece integrally formed with the tension lever and provided with a pointer.

The film traveling apparatus according to the present invention is
The film traveling guide means was attached to the substrate in an exposed state and provided with a front plate provided with a display window for making the pointer of the detection piece face outward, and was made to face the display window of the front plate. The load state of the running tension on the video film is displayed by the pointer position of the detection piece.

On the main surface of the front plate, a route display showing the mounting position of the image film is displayed along the film traveling route.

The film traveling apparatus configured as described above is provided with the traveling tension load mechanism for displaying the traveling tension applied to the image film and the route display according to the film traveling route. The image film is easily and accurately mounted, and the image film is loaded with an appropriate traveling tension so that the image film can be stably driven with respect to the sound drum.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the film running device according to the present invention is located in front of the projection unit, is attached to the digital projection device 1, and is supplied with the video film 2 from the video film supply / rewinding device 3. Which is a device for reproducing a digital sound signal from a digital sound signal recording section provided corresponding to the image frame, and constitutes a digital sound signal reproducing device 4. Digital sound signal reproducing device 4
Together with the digital projection device 1 constitute a digital sound projection system.

The digital sound projection system feeds the video film 2 from the video film supply unit 3A side of the video film supply / rewinding device 3 and the video film configured in the digital projection device 1 via the digital sound signal reproducing device 4. The film is guided to the traveling path, rewound to the image film supply / winding device 3 again, and is hung on the image film winding unit 3B side. The digital projection apparatus 1 runs the supplied video film 2 in the film running path by using the driving sprockets 5 and 6 as driving sources.

The digital projection apparatus 1 is arranged at the rear stage of the digital sound signal reproducing apparatus 4, and is located opposite to the image film running path formed between the drive sprockets 5 and 6, and is located at the light source section 7 and the projection section 8. Is provided. The projection light emitted from the light source unit 7 to the image film 2 passes through the image film 2 and is imaged by the projection unit 8 and projected on the screen.

The video film 2 used in the digital sound projection system is not only analog sound, but also digital sound in combination to achieve better sound quality, stereo sound, and enhanced presence. Therefore, this video film 2 is provided with a pair of left and right digital sound signal recording sections recording digital sound signals on both sides, as well as an analog sound signal recording section recording analog sound signals.

The analog sound signal recorded in the analog sound signal recording unit is composed of a light-shielding band portion whose width dimension continuously changes corresponding to the voice waveform, and changes in the amount of transmission of the emitted light are converted into the amount of electricity. The sound corresponding to the video frame is reproduced by converting into the change.

The digital signals recorded in the digital sound signal recording section are composed of bar codes which are arranged in a pattern in a direction intersecting with the traveling direction of the image film 2.

This digital signal is read and reproduced by a digital sound signal reproducing device 4 which will be described later, and is input to the processor 9 to be subjected to signal processing. The output of the processor 9 is input to the speakers 11 and 12 of the speaker system via the amplifier 10, and the digital sound signal recorded on the video film 2 is reproduced to enjoy digital sound.

The digital sound signal reproducing device 4 is combined with the front stage of the digital projection device 1 as described above,
As shown in FIG. 2, the first guide roller 13 to the sixth guide roller 18 that constitute the film traveling path of the image film 2 supplied from the image film supply / rewinding device 3.
, Guide sprocket 19 and sound drum 20
A first tension roller 21, a pair of upper and lower second tension rollers 22 and 23, and a pair of upper and lower third tension rollers 24 and 25.

The first guide roller 13 is arranged in the film supply section 4A of the digital sound reproducing device 4 and multiplies the supplied video film 2 to make it run back in a substantially horizontal direction. Further, the sixth guide roller 18 is
It is arranged in the film sending section 4B of the digital sound reproducing device 4 and multiplies the video film 2 to run to the digital projection device 1 side.

The first tension roller 21 is arranged at the rear stage of the supply side guide roller 14 and applies a predetermined traveling tension to the supplied image film 2 to guide the guide sprocket through the guide roller 15. Drive to 19. The second tension rollers 22 and 23 are arranged at centrally symmetrical positions with respect to the guide sprocket 19,
The video film 2 is pressed against the peripheral surface of the guide sprocket 19 to run. The third tension roller 24,
25 is a guide sprocket 19 and a sound drum 20.
Between the sound drum 20 and the sound drum 20
On the other hand, a predetermined running tension is applied so that the video film 2 runs in a stable state.

Further, the first to third tension rollers 2
1 to 25 are first to third tension levers 26, one end of each of which is cantilevered by a support shaft 26A to 30A on a substrate 4C of the digital sound signal reproducing device 4.
It is swingably supported by the free ends of the through 30. In addition, the first to third tension levers 26 to 3
0 is urged in the direction of the image film 2 by the elastic force of the springs 31 to 35 wound around the support shafts 26A to 30A. The running tension applied to the video film 2 by the springs 31 to 35 is a slight elastic force, and does not hinder the running of the video film 2 in the video film running path.

The video film 2 supplied from the film supply section 4A of the digital sound signal reproducing device 4 is folded back in a substantially horizontal direction by the first guide roller 13 and then further passed through the first tension roller 21. Folds down. The image film 2 is folded back in the horizontal direction by the second guide roller 15 and guided to the guide sprocket 19. The perforation of the image film 2 meshes with the feed claws of the guide sprocket 19, and the second tension roller 22 presses the peripheral surface of the guide sprocket 19 to run.

Further, the image film 2 is pushed down by the third tension roller 24, and is run to the sound drum 20 under a running tension. The video film 2 is folded around the circumferential surface of the sound drum 20 in a state in which the film 2 is circulated over approximately a half circumference. The video film 2 is moved upward to the guide sprocket 19 while being loaded with a running tension by being pushed upward by the third tension roller 25.

The image film 2 is pressed against the lower peripheral surface of the guide sprocket 19 by the second tension roller 23, and the meshing state of the perforation and the feed claw is maintained. The image film 2 is folded back downward by the fourth guide roller 16 and at the same time as the fifth guide roller 16.
It is folded back in the horizontal direction by the guide roller 17 and travels. The image film 2 has a sixth guide roller 1
It is folded back downward by 8 and traveled to the digital projection apparatus 1 via the film feeding section 4B.

The guide sprocket 19 has a large number of feed claws that are spaced apart in the width direction and project around the circumference at regular intervals on the outer periphery of the guide sprocket 19, and engage with the perforations of the image film 2. There is. Therefore, the guide sprocket 19 rotates counterclockwise in FIG. 2 in synchronism with the running motion of the video film 2 pulled by the first drive sprocket 5 of the digital projection apparatus 1. Accordingly, the guide sprocket 19 draws the video film 2 from the film supply unit 4A into the digital sound / signal reproducing device 4 and also from the film sending unit 4B to the digital projection device 1.

An optical reader 36 for digital sound signals is attached to the sound drum 20. The optical reading device 36 of the digital sound signal includes a reading light source and an optical fiber 37 arranged on the sound drum 20 side (not shown), an objective lens 38 arranged facing the sound drum 20, and a CCD line sensor 39.
And a processing unit (not shown). The optical fiber 37 has one end facing the reading light source and the other end bifurcated so as to face the digital sound signal recording parts on both sides of the image film 2.

Objective lens 38 and CCD line sensor 3
9 are arranged on the optical axis of the optical fiber 37 via the digital sound signal recording section of the video film 2.

Therefore, the reading sound emitted from the light source of the digital sound signal recorded in the digital sound signal recording section of the video film 2 is guided into the optical fiber 37 and is applied to the digital sound signal recording section. In the state of being converted into an optical bright and dark bar code signal, the image is formed on the CCD line sensor 39 through the objective lens 38.

The CCD line sensor 39 converts the light and dark optical code signal corresponding to the digital sound signal into an electric code signal and outputs the electric code signal to the processor 9 via the processing section, as described above. The digital sound signal recorded in the digital sound signal recording area of the video film 2 which is read and reproduced by the digital sound signal reproducing device 4 and input to the processor 9 is output to the speakers 11 and 12 through the amplifier 10. , Enjoy digital sound.

The video film 2 guided to the sound drum 20 is loaded with proper running tension by the third tension rollers 24 and 25, so that a good digital sound signal is read and reproduced. The running tension of the image film 2 is the third tension that supports the third tension rollers 24 and 25 as described above.
Spring 3 attached to tension levers 29 and 30 of
It is loaded by the elastic forces of 4, 35.

By the way, in the digital sound signal reproducing device 4, as shown in FIG. 2, the state of the running tension applied to the mounted image film 2 is displayed by the running tension load mechanism. The traveling tension load mechanism includes a pointer 41 of a detection piece 40 integrally formed with the third tension lever 30, a display window 43 and an index 44 provided on the front plate 42.

As shown in FIGS. 3 and 4, the detection piece 40 is formed integrally with the third tension lever 30 so as to have a substantially fan plate shape at the side edge thereof. The detection piece 40 includes
A pointer 41 is provided for displaying the running tension applied to the video film 2. Therefore, the pointer 41 moves along the index 44 as the third tension lever 30 rotates. Pointer 41
Is a display window 43 provided on a front plate 42 described later.
The front plate 42 together with the display window 43.
The position corresponding to the index 44 provided in the. Display window 43
Form a substantially fan shape that is slightly smaller than the detection piece 40, and are provided on the front plate 42 corresponding to the rotation region of the detection piece 40.

According to the traveling tension load mechanism constructed as described above, the rotational position of the third tension lever 30 differs depending on the state of the load of the traveling tension on the image film 2, and the third tension lever 30 and The integrated detection piece 40 moves along the display window 43. That is, when a large traveling tension is applied to the video film 2, the detection piece 40 is moved to the third position as shown in FIG.
Since the tension lever 30 is positioned in the counterclockwise rotated state as a whole, the tension lever 30 is integrally rotated in the counterclockwise direction. Further, when the traveling tension with respect to the video film 2 is small, the detection piece 40 is located in the state in which the third tension lever 30 is rotated in the clockwise direction as a whole, and therefore is in the state in which the detection piece 40 is integrally rotated in the clockwise direction. It is in.

The moving position of the detection piece 40 is determined by the pointer 4
1 is visually recognized by being positioned corresponding to the index 44 provided along the display window 43 of the front plate 42. Therefore, the digital sound signal reproducing device 4 can display the state of the running tension applied to the image film 2 by the running tension load mechanism, and thus can read and reproduce the good digital sound signal. it can. Also, the digital sound signal reproducing device 4
It is confirmed that, when the image film 2 is mistakenly attached, it is confirmed that the proper traveling tension is not applied to the image film 2, and the image film 2 is scratched or broken, or the perforation is damaged. Occurrence of a situation such as deformation is avoided.

A pointer 41 provided on the detection piece 40
Acts as a scale indicating the load state of the proper running tension on the image film 2, and the index 44 provided on the front plate 42 acts as an arrow that is aligned with the scale indicating the proper running tension. But,
The display method is not limited to such a configuration, and any method may be used as long as it shows a proper running tension load state on the video film 2.

On the front plate 42, the above-mentioned display window 4 is provided.
3 and the index 44 are provided, and as shown in FIG. 5, a route display 45 showing the mounting position of the video film 2 is displayed according to the actual film traveling route. Therefore, the video film 2 is supplied from the film supply unit 4A of the digital sound signal reproducing device 4 and is attached to each member so as to coincide with the solid line of the route display 45 displayed on the front plate 42 and the film delivery port. Guided to 4B.

Further, the front plate 42 has escape portions 46 to 49 for the second to fifth guide rollers 14 to 16, and
Escape portion 50 of guide sprocket 19, escape portion 51 of sound drum 20, first to third tension rollers 7
Escape parts 52 to 56 are provided. Each of the above-mentioned members is exposed to the outside of the front plate 42 via these escape portions. The front plate 42 has screw holes 57 (57
A, 57B, 57C, 57D) are fixed to the substrate 4C by screwing in screws.

In the digital sound signal reproducing apparatus 4 configured as described above, the image film 2 is mounted by being attached to each guide roller in accordance with the route display 45 of the front plate 42, and each tension roller is attached to the image film 2. It is pressed and the running tension is applied to the video film 2. The detection piece 40 is integrated with the tension lever 30 depending on the load state of the traveling tension.
Move along 3. For example, in FIG.
0 rotates clockwise when the traveling tension on the image film 2 is small.
1 is located below the index 44. Therefore, the video film 2 has the pointer 41 and the index 4 which can be seen through the display window 43.
4 are mounted in correspondence with each other, and the image film 2 adjusted to an appropriate traveling tension by the traveling tension load mechanism is circulated on the sound drum 20.

As described above, the digital sound signal reproducing device 4 can confirm the load state of the running tension on the video film 2 by providing the detecting piece 40 on the tension lever 30, and also in the film running path. The image film 2 can be easily and accurately mounted with an appropriate running tension, and the image film 2 can be stably run on the sound drum 20.

Further, the front plate 42 is provided with a route display 45 indicating the film traveling route on the main surface thereof in accordance with the film traveling route.
It is possible to prevent the image film 2 from being scratched or broken, or the perforation to be damaged or deformed due to being mistakenly attached, and the image film 2 can be easily and accurately attached to the film traveling path.

The present invention is not limited to the digital sound signal reproducing device 4 described above, and for example, the traveling tension load mechanism is developed as an optical tension detecting mechanism 58 shown below.

As shown in FIG. 6, the optical tension detecting mechanism 58 includes a second detecting piece 60 in which a slit 59 is formed together with a pointer 41 indicating the running tension of the image film 2, and the second detecting piece 60. The optical detecting means is composed of an optical element 61 for detecting the slit 59 and a light receiving element 62. The second detection piece 60 has a substantially fan plate shape at the side edge portion of the tension lever 30 and is integrally projected. Therefore, the second detection piece 60 moves as the tension lever 30 rotates. The detection piece 60 is provided with a pair of slits 59 at both ends of the proper region of traveling tension together with the pointer 41. The light receiving element 62 is disposed on the surface of the substrate 4C corresponding to the rotation region of the detection piece 60, and the detection light emitted from the optical element 61 disposed on the front plate 42 and corresponding to the light receiving element 62. Passes through the slit 59 to detect the detection light and send a detection signal to the traveling tension display device 64. The traveling tension display device 64 is equipped with an alarm device for issuing an alarm upon receiving a detection signal sent from the light receiving element 62 when the traveling tension on the video film 2 exceeds an appropriate area.

As described above, the optical tension detecting mechanism 58 can automatically confirm whether the traveling tension applied to the image film 2 is in an appropriate state. The film 2 can be easily and accurately attached with proper tension. Further, the optical tension detecting mechanism 58 is provided with an alarm device, so that it is possible to deal with the case where the tension abnormality occurs during the film running.

The present invention is not limited to the digital sound signal reproducing device 4 described above, and the arrangement of each tension roller and each guide roller is the same as that of the video film 2.
Can be appropriately selected so that the vehicle can travel in a stable state, and accordingly, the tension lever on which the detection piece is disposed can also be appropriately selected.

[0051]

According to the film running apparatus of the present invention, since the running tension loading mechanism for displaying the running tension applied to the video film mounted along the film running path is provided, The image film is easily and accurately mounted along the traveling path with proper traveling tension, and the image film is stably traveling with respect to the sound drum.

Further, according to this film running device, since the front plate is provided with the route display indicating the mounting position of the image film according to the actual film running route, the image film is erroneously loaded. The image film can be mounted easily and accurately along the film traveling path without

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of an entire digital sound projection system including a digital sound signal reproducing device in which a film traveling device according to the present invention is used.

FIG. 2 is a configuration diagram showing a schematic configuration of an entire digital sound signal reproducing apparatus.

FIG. 3 is a main part plan view showing the traveling tension load mechanism.

FIG. 4 is a perspective view of a main part showing the traveling tension load mechanism.

FIG. 5 is a plan view showing a front plate of the digital sound signal reproducing device.

FIG. 6 is a perspective view of a main part showing another optical tension detection mechanism according to the present invention.

FIG. 7 is a configuration diagram showing a schematic configuration of an entire conventional digital sound signal reproducing device.

[Explanation of symbols]

 2 video film 4 digital sound signal reproducing device 25 third tension roller 30 third tension lever 40 detection piece 41 pointer 42 front plate 43 display window 44 index 45 route display 58 optical tension detection mechanism

Claims (3)

[Claims] 1. A film running guide means which constitutes a running path of a video film, a tension lever whose one end is rotatably cantilevered on a substrate, and rotatably supported by the other end of the tension lever. The tension roller, elastic means for urging the tension lever in the direction of pressing the tension roller against the image film, and a detection piece integrally formed with the tension lever and provided with a pointer. The film is mounted on the substrate with the film tension guide mechanism exposed and the film tension guide mechanism that applies the film tension to the moving image film that is hung on the film, and the pointer of the detection piece is exposed to the outside. A front plate provided with a display window and facing the display window of the front plate. A film traveling device, wherein the load state of the traveling tension on the video film is displayed by the pointer position of the detected piece. 2. A pointer of the detection piece is constituted by a slit, and an optical detection means composed of an optical element and a light receiving element is arranged so as to face the operation area of the slit, and the load state of the running tension on the image film is determined. The film traveling apparatus according to claim 1, wherein the film traveling apparatus is configured to detect the film. 3. The film traveling device according to claim 1, wherein the front plate has a route display indicating a mounting position of the image film on a main surface thereof according to a film traveling route.