JPH1078616A - Film intermittently feeding device and projecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely and intermittently feed film without damaging the film and to simplify maintenance by feeding the film positioned at a specified position by using negative pressure. SOLUTION: When the film 13 is drawn out by specified length from a suction port 81 in a direction reverse to an arrow (d) by an ejection side sprocket 91 rotated at constant speed in a state where the film 13 is positioned at a gate part 40 by pins 58A and 58B, a positioning member 57 is turned by the operation of the coil part 75 of the gate part 40 and the pins 58A and 58B are pulled out from the perforation of the film 13. In such timing, the film 13 in the suction port 81 exists in a negative pressure range (that is, within the suction port 81) by the suction hole 83 of the suction port 81 and the film 13 which is unlocked from the pins 58A and 58B is restored to a film abutting surface 81A in the suction port 81 in a direction shown by the arrow (d). Thus, the film 13 at the gate part 40 is fed in the direction shown by the arrow (d).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Table of Contents] The present invention will be described in the following order. Technical Field to which the Invention pertains Prior Art (FIG. 23) Problems to be Solved by the Invention Means for Solving the Problems Embodiments of the Invention (1) Overall Configuration of Telecine Device (FIG. 1) (2) Projection Device and (3) Circuit configuration of telecine device (FIGS. 19 to 21) (4) Operation and effect of embodiment (FIG. 22) (5) Other embodiments Effect

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent film feeder and a projector, and more particularly to a projector used for converting a video recorded on a 35 mm film for a movie into a video signal and an intermittent feeder for the film. It is suitable for application.

[0003]

2. Description of the Related Art Heretofore, when an image recorded on a cinema film is converted into a video signal and recorded on, for example, a magnetic tape, a projection device called a so-called telecine device has been used. This projection apparatus positions one frame of the image recorded on the film on the optical axis of the lens of the video camera, and in this state, makes the light source light incident on the imaging system of the video camera via the film to perform the positioning. The image of the frame is picked up by a video camera. In this way 1
When the shooting of the frame is completed, the film is fed to position the next frame on the optical axis, and the same shooting is performed in this state. By sequentially capturing each frame of the film with the video camera, the moving image sequentially recorded on the film is converted into a video signal.

[0004]

However, in the projection device having such a configuration, a so-called Geneva gear is used.
The film is intermittently fed by a mechanism using r). That is, as shown in FIG. 23, the intermittent feed device 1 is rotated while the peripheral side surface 6 of the original vehicle 5 is in contact with the arc-shaped side surface 4 of the driven vehicle 3 in which radial grooves 2 are formed at equal angular intervals. . At this time, the driven vehicle 3 is rotated while the pins 7 of the original vehicle 5 are inserted into the grooves 2 of the driven vehicle 3.

[0005] As a result, the driven vehicle 3 rotates only while the pin 7 is inserted into the groove 2, whereby the continuously rotated original vehicle 5 is rotated.
As a result, the driven vehicle 3 rotates intermittently. By sending the film by the driven vehicle 3, the film is intermittently sent.

However, when the intermittent feeder 1 having such a configuration is used, the friction between the original vehicle 5 and the driven vehicle 3 is prevented by immersing the original vehicle 5 and the driven vehicle 3 in lubricating oil, and oil leakage is prevented. There was an inevitable problem. Further, in the intermittent feeder 1 using Geneva gears, it is difficult to accurately intermittently feed the film due to the dimensional accuracy and the mounting accuracy of the original vehicle 5 and the slave vehicle 3, and as a result, the film is damaged. Was.

On the other hand, after inserting a pin into the film perforation and positioning the film, the pin is removed from the perforation and the film is intermittently fed by a cam mechanism interlocked with the pin. Thus, there is a type in which the insertion / removal of a pin with respect to the perforation of a film and the operation of feeding the film are mechanically linked. In this case, if the film is deformed due to aging or the like, the pin does not enter the perforation,
There was a problem that damaged the film.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an intermittent film feeder and a projection system capable of surely intermittently feeding the film without damaging the film and simplifying the maintenance with a simpler structure. It is intended to propose a device.

[0009]

According to the present invention, there is provided a film intermittent feeding device for intermittently feeding a film and a projection device, wherein the film positioned at a predetermined position is fed using a negative pressure. I do.

According to the present invention, the film positioned at a predetermined position is curved in an arc shape on the feeding side of the film, and the curved film is sucked from the outer peripheral surface side, whereby the positioned film can be simplified. And can be sent reliably.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

(1) Overall Configuration of Telecine Device In FIG. 1, reference numeral 10 denotes a telecine device as a whole, and a film 13 wound around a supply reel 12A is a roller 1
The light is transmitted to the projection device 20 via the rollers 4A and the rollers 14B of the tension arm 15A. Tension arm 15
A is positioned at a predetermined position by springs 16A and 16B with an urging force, and a predetermined tension is applied to the film 13.

The film 13 sent to the projection unit 20
The film is positioned and intermittently fed by the film intermittent feeding device 25 on the optical axis of the imaging lens 27 of the video camera 26 fixed to the camera mount 11A of the support plate 11. Below the film 13 positioned on the optical axis,
A light source unit 21 is provided. In the light source section 21, an optical differential user 23 composed of a dichroic mirror for transmitting heat rays to the outside is provided in a box 24 constituting an external housing, and a light source 22 is provided in the optical differential user 23. ing.

Accordingly, the light from the light source 22 is emitted in a state where the frame (one screen) of the film 13 to be imaged is positioned on the optical axis of the imaging lens 27 by the film intermittent feeding device section 25. An image of the obtained film 13 is picked up by a video camera 26. When the photographing for one frame is completed, the film 13 is fed by the intermittent feed unit 25 until the next frame is positioned on the optical axis. In this way, the intermittent feed unit 25 is
The film 13 is intermittently fed so that each frame is sequentially positioned on the optical axis.

The photographed film 13 sent from the projection device section 20 is a roller 14C of a tension arm 15B.
And is wound up on the take-up reel 12B via the roller 14D. The tension arm 15B has springs 16C and 16D.
Thus, the film 13 is positioned at a predetermined position with an urging force, and a predetermined tension is applied to the film 13.

(2) Structure of Projection Unit and Film Intermittent Feed Unit In FIG. 2, the projection unit 20 receives the film 13 sent from the supply reel 12A (FIG. 1) on the supply sprocket 31. The supply-side sprocket 31 is rotatably pivoted integrally with a rotating shaft 37 pivotally supported by a bearing portion 32.

As shown in FIG. 3, a gear 103 is fitted and fixed to an output rotary shaft 102 of a sprocket motor 101 provided on the back side of the support plate 11, and two gears are fitted to the gear 103. The gear 10 through 104, 105
6 are meshed. Therefore, the sprocket motor 101
By rotating the gear, the gear 106 is rotated, whereby the rotating shaft 37 fitted and fixed to the center of rotation of the gear 106 is rotated. As a result, the supply sprocket 31 (FIG. 2) rotates. In this embodiment, the sprocket motor 101 is driven to rotate at a constant speed, so that the supply sprocket 31 also rotates at a constant speed.

In FIG. 2, the supply-side sprocket 31 has a plurality of pins 31A and 31B on the peripheral side surface, and feeds the film 13 by inserting the pins 31A and 31B into the perforation of the film 13. Can be. At this time, the film 13 engaged with the supply-side sprocket 31 is sandwiched between the film pressing roller 33 and the supply-side sprocket 31, whereby the pins 31A and 31B are held on the perforations of the film 13.
Is ensured to be inserted. Incidentally, as shown in FIG. 4, on the front side of the projection device section 20, the film pressing roller 33 is rotatably supported by a rotating shaft 36, and the rotating shaft 36 Fixed. The rotation arm 34 is configured to be rotatable about a shaft member 35, whereby the film pressing roller 33 rotates between a position where it contacts the peripheral side surface of the supply-side sprocket 31 and a position where it is separated therefrom. Can move.

The rotating arm 34 is provided with a predetermined spring member (not shown) at a position where the film pressing roller 33 contacts the peripheral side surface of the supply-side sprocket 31 and at a position separated from the peripheral side surface by a predetermined distance. Can be positioned. Accordingly, the film 13 is engaged with the peripheral side surface of the supply-side sprocket 31 while the film pressing roller 33 is positioned at a position separated from the peripheral side surface of the supply-side sprocket 31, and the pins 31A and the pins 31A and By positioning the film holding roller 33 at a position where the film pressing roller 33 comes into contact with the peripheral side surface of the supply-side sprocket 31 with the insertion of the supply-side sprocket 31B,
The film 13 engaged with the film 13 can be reliably held by the film pressing roller 33.

In FIG. 2, the film 13 sent from the supply side sprocket 31 is fed with a predetermined slack to a gate section 40 provided as a film positioning means of the film intermittent feeding section 25. The gate section 40 is provided with a film sliding plate 41 at the bottom of the guide groove 42 so that the film 13 can slide on the film sliding plate 41 along the guide groove 42.

At this time, as shown in FIG.
Of the film 13 is brought into sliding contact with the film sliding plate 41 by pressing the upper surface of the film 13 with the plurality of rollers 44 of the film pressing portion 49, whereby the film 13 is moved in the height direction (that is, in the imaging lens 27 (FIG. 1)). (Position in the optical axis direction). Thus, the displacement of the film 13 in the optical axis direction of the imaging lens 27 can be prevented, so that the focal point of the imaging lens 27 with respect to the film 13 can be prevented from being easily shifted.

As shown in FIG. 6, the film holding portion 49 includes roller holding members 59A and 59A for holding the roller 44.
Sliding shafts 63A and 63 fixed to the upper surface of 9B, respectively.
B is inserted into the through hole of the support 62, and the upper part thereof is
Receive at 4. Therefore, the roller holding members 59A and 59B are urged downward by the leaf spring 64, whereby the film 13 is pressed by the pressing force corresponding to the spring force of the leaf spring 64.
4 and the sliding plate 41.

An opening 41A having a size corresponding to one frame (one screen) of the film 13 is formed in the film sliding plate 41, and the light emitted from the light source 22 (FIG. 1) of the light source section 21 is applied to the opening. The frame of the film 13 positioned on the opening 41 can be irradiated through the opening 41A.

That is, in FIG. 4, the light source 22 (FIG. 1)
Is transmitted through the heat ray absorption filter 47 provided at the upper part in the optical differential user 23, and then the light is irradiated from the opening 51.
And reaches the shutter section 50 via. The shutter unit 50 has a shutter plate 52 that can rotate about an output rotation shaft 62 of a shutter motor 61 as a center of rotation.

This shutter plate 52 is, as shown in FIG.
A plurality of notched shutter openings 53A, 53
B,..., 53E, and the shutter plate 52 obtained by rotating the shutter motor 61 at a constant speed causes the shutter openings 52A, 53B,.
, 53E sequentially pass on the optical axis of the projection lens 27 (FIG. 4).

Accordingly, in FIG. 4 and FIG.
When the shutter opening 53B moves to the position on the optical axis, the light from the light source 22 (FIG. 1) is transmitted to the shutter opening 53B.
To reach the opening 54 formed at the bottom of the gate section 40. The gate section 40 has a light diffuser 48 made of opal glass on the opening 54, and light incident through the opening 54 is diffusely reflected and diffused by the light diffuser 48. As a result, the film 13 is illuminated with uniform illuminance through the opening 41A of the film sliding plate 41 disposed above the light diffusing plate 48.

As described above, the frame of the film 13 positioned on the opening 41A is rotated by the shutter plate 5 rotating at a constant speed.
2, any of the shutter openings 53A (53
B, 53C, 53D or 53E), the image of the frame is captured by the video camera 26 (FIG. 1) when it is illuminated, and the image is converted into a video signal.

Here, the gate section 40 is provided with a positioning member 57 for positioning the film 13. That is, as shown in FIG.
The U-shaped two arms 57A and 57B have pins 58A and 5
8B is fixed. Also, two protrusions 57D and 5
7E is rotatably supported by the shaft members 66A and 66B, whereby the positioning member 57 is rotatably supported about the shaft members 66A and 66B as a whole.

FIG. 9 shows a state in which the positioning member 57 has been rotated about the shaft member 66B in the direction shown by the arrow a, and is provided at the lower end of the pin 58B (and 58A (FIG. 8)). The part 68B (and 68A (FIG. 8)) is
When the position 1 is urged upward, the positioning member 57 is urged as a whole in the direction of arrow a, and the state in which the locking portion 57 </ b> C is in contact with the stopper 73 is maintained. In this state, the pins 58B (and 58A (FIG. 8)) penetrate through the through holes 41C (and 41B (FIG. 5)) formed in the slide plate 41, and the leading ends thereof are inserted into the perforations of the film 13. Then, the film 13 is positioned (locked).

Incidentally, the pins 58A and 58B of the positioning member 57 have different diameters. In the case of this embodiment, one pin 58B is formed to be approximately the size of the perforation of the film 13, while the other pin 58A is formed to be slightly smaller than the size of the perforation. . Thereby, the perforations 13A and 13B provided on both sides of the film 13 are provided.
The pins 58A and 58B can be reliably inserted into the perforations 13A and 13B by absorbing the error in the formation position of FIG. 5 and the interval error between the pins 58A and 58B, and an error occurs in the running direction of the film 13. Also make sure that the pins 58A and 58B are connected to the perforations 13A and 13A.
3B.

On the other hand, when a predetermined driving current is applied to the winding 75A of the coil portion 75, the positioning member 57 made of an iron-based material is formed by the lines of magnetic force generated in the iron core 75B.
Is pulled by the iron core 75B. As a result, FIG.
As shown in FIG. 0, the positioning member 57 as a whole rotates in the direction of arrow b against the urging force of the leaf spring 71 and
C is held in a state of contact with iron core 75B of coil portion 75.

In this state, the pins 58B (and 5
8A (FIG. 8) is a perforation of the film 13 positioned on the sliding plate 41 and a through hole 4 of the sliding plate 41.
1C (and 41B (FIG. 5)) is pulled out downward (in the direction of arrow b), whereby the film 13 is unlocked.

Here, the film 13 unlocked in the gate section 40 is discharged through the suction port 81 of the suction section 80 as shown in FIGS.
Sent to 1. The suction part 80 includes a suction pipe 82 penetrating from the back side to the front side of the support plate 11 and the suction pipe 8.
Suction port 81 communicating with suction port 83 via suction hole 83
And Inside the suction port 81, a film abutting surface 81A having a predetermined curvature is formed. Suction pipe 8
Side surfaces of the suction port 81 and the front side of the suction port 81 are closed by a side plate 84 formed of a transparent plate.

Accordingly, the inside of the suction pipe 82 is sucked from the back side of the support plate 11 using a vacuum device such as a vacuum cleaner, so that the suction port 81 is drawn through the suction hole 83.
The air on the film contact surface 81A side is sucked into the suction pipe 82 side. As a result, the film 1 in the suction port 81
3 is always drawn in the direction indicated by arrow d (FIG. 4).

On the other hand, the discharge sprocket 91 is
The rotation shaft 93 is rotatably supported about a rotation shaft 93 pivotally supported by a bearing portion 92 (FIG. 2). The rotation shaft 93 is the same as the sprocket motor 101 (FIG. 3) as the drive source of the supply-side sprocket 31. And is fixedly fitted to the rotation center of a gear 107 meshed with the gear 102. The number of teeth of this gear 107 is the same as the number of gears 106 on the supply sprocket 31 side, whereby the discharge sprocket 91 is driven to rotate at a constant speed at the same speed as the supply sprocket 31.

2 and 4, the discharge sprocket 91 is provided with a plurality of pins 91A and 91B on the peripheral side surface, and the pins 91A and 91B are inserted into the perforation of the film 13 so that the film 1 is removed.
3 can be ejected and fed in the direction of arrow e (FIG. 4). At this time, the film 13 engaged with the discharge-side sprocket 91 is sandwiched between the film pressing roller 95 and the discharge-side sprocket 91, so that the pins 91A and 91B are securely inserted into the perforations of the film 13. It has been done.

In FIG. 4, the film pressing roller 95 is rotatably supported by a rotating shaft 96, and the rotating shaft 96 is fixed to a rotating tip of a rotating arm 97. The rotation arm 97 is configured to be rotatable about a shaft member 98, whereby the film pressing roller 95 rotates between a position where it contacts the peripheral side surface of the discharge side sprocket 91 and a position where it is separated therefrom. Can move.

The rotating arm 97 is mounted on a predetermined spring member (not shown) at a position where the film pressing roller 95 contacts the peripheral side surface of the discharge side sprocket 91 and at a position separated from the peripheral side surface by a predetermined distance. Can be positioned. Accordingly, the film 13 is engaged with the peripheral side surface of the discharge-side sprocket 91 while the film pressing roller 95 is positioned at a position separated from the peripheral side surface of the discharge-side sprocket 91, and the pins 91A and 91A are engaged with the perforations of the film 13. By positioning the film holding roller 95 at a position where it contacts the peripheral side surface of the discharge-side sprocket 91 with the 91B inserted, the discharge-side sprocket 91 is positioned.
The film 13 engaged with the film 13 can be reliably held by the film pressing roller 95.

The film 13 is discharged at a constant speed in the direction of the arrow e (FIG. 4) by the discharge sprocket 91 rotating at a constant speed. At this time, the film positioning member 57 of the gate section 40 is in a state of positioning the film 13, and the pins 58A and 58B (FIG. 5)
When the film 13 is inserted into the perforations 13A and 13B, the film 13 does not move in the gate portion 40, and as a result, the film 13 sucked by the bottom surface (film contact surface 81A) in the suction port 81 is discharged. The arrow d moves through the suction port 81 in accordance with the rotation of the side sprocket 91.
It moves in the opposite direction to (FIG. 4).

As described above, the positioning member 5 of the gate portion 40
7, while the film 13 is positioned on the optical axis of the imaging lens 27, the discharge sprocket 91 continuously rotates at a constant speed. During this time, the film 13 in the suction port 81 is pulled in the direction opposite to the arrow d. This prevents the film 13 from being damaged.

Here, as shown in FIG. 11, a rotation detecting section 110 is provided on the sprocket motor 101 provided on the back side of the support plate 11. This rotation detector 110
Is a disk-shaped pulse generating rotary plate 115 whose rotation center is fitted to the output rotary shaft 102 of the sprocket motor 101.
And a disk-shaped frequency generating rotary plate 114 whose rotation center is fitted to the output rotary shaft 102. As shown in FIG. 12, each rotary plate is integrated with the output rotary shaft 102 at a predetermined interval from each other. To rotate.

In FIG. 11, the rotary plate 11 for pulse generation
5 has two notches 115A separated by an angular interval of 180 °.
Is formed, and the notch 115A is
To detect. This allows the sprocket motor 10
Two rising pulses are obtained as an output signal of the photo sensor 112 while one output rotation shaft 102 makes one rotation.

A plurality of notches 114 A are formed in the frequency generating rotary plate 114 at predetermined angular intervals, and the notches 114 A are detected by the photo sensor 113. As a result, a frequency signal whose frequency changes in accordance with the rotation speed of the output rotation shaft 102 of the sprocket motor 101 is obtained as the output signal of the photo sensor 113.

The photo sensor 112 is fixed to a positioning plate 109 fixed to the sprocket motor 101 with screws 109A and 109B. Positioning plate 109 has elongated holes 109C and 10C at the fastening portions of screws 109A and 109B.
9D, and can be fixed in a state of being rotated by a predetermined angle about the rotation shaft 102. Thereby, the photo sensor 112
And 113 can be positioned at any position within the rotation area.

Accordingly, in the state shown in FIG. 4, when the film 13 in the suction port 81 is pulled by a predetermined distance in the direction opposite to the arrow d by the discharge sprocket 91 rotating at a constant speed, the sprocket motor 101 is rotated. By operating the coil unit 75 of the gate unit 40 based on the pulse signal obtained from the photo sensor 112 of the rotation detection unit 110, the film positioning member 57 is pulled by the coil unit 75 for a predetermined time. As a result, the film 13 is unlocked in the gate section 40 as shown in FIG.

As a result, the film 13 pulled in the suction port 81 by a predetermined distance in the direction opposite to the arrow d is pulled back in the direction of the arrow d, and abuts against the film contact surface 81A formed at the bottom of the suction port 81. Touch (FIG. 4). At this time, the supply-side sprocket 31 is connected to the sprocket motor 10.
The rotation of the film 13 between the supply sprocket 31 and the gate section 40 is maintained by rotating the film 13 at a constant speed according to 1.

The film positioning member 57 of the gate section 40
When the film is released by the driving operation of the coil unit 75 based on the rotation detecting unit 110 of the sprocket motor 101, the driving of the coil unit 75 is terminated after a predetermined time elapses. Then, the film returns to the film positioning (locked) state again (FIG. 4). As a result, the film 13 in the suction port 81 is pulled again in the direction opposite to the arrow d by the discharge sprocket 91 rotating at a constant speed.

As described above, the positioning member 57 of the gate section 40 is driven based on the pulse signal obtained from the rotation detecting section 110 provided in the sprocket motor 101, and the film 13 is positioned in the gate section 40 (lock).
The film 13 is intermittently fed by repeating the lock release.

Incidentally, when the film positioning member 57 of the gate section 40 does not release the film 13 despite the output of the pulse signal from the rotation detecting section 110, the film 13 in the suction port 81 rotates at a constant speed. 4 is pulled in the direction opposite to the arrow d (FIG. 4) by the discharge side sprocket 91 and comes into contact with the discharge side loop setting roller 121 provided in the safety device 120.

The discharge-side loop setting roller 121 is rotatably supported at the lower end of a turning arm 123 which turns around a turning shaft 122. Accordingly, when the film 13 in contact with the discharge-side loop setting roller 121 is further pulled in the direction opposite to the arrow d by the discharge-side sprocket 91 rotating at a constant speed, as shown in FIG. Is moved in the direction opposite to the arrow d by the film 13.

At this time, the rotation arm 123 supporting the discharge-side loop setting roller 121 rotates about the rotation shaft 122 in the direction indicated by the arrow f. A rod 124 is engaged with the upper end of the rotating arm 123, and the rod 124 moves in the direction of the arrow g as the rotating arm 123 rotates in the direction of the arrow f. A rotating shaft 126 is engaged with the right end of the rod 124 via an engaging member 125 (FIG. 2), and rotates with the movement of the rod 124. Also, the rotating shaft 126
A rod 127 is engaged with the lower end of the shaft, and moves as the rotating shaft 126 rotates. Accordingly, when the rod 124 moves in the direction of the arrow g, the rod 127 moves in the direction of the arrow h via the rotary shaft 126.

At this time, as shown in FIG.
0, the pin 128 fixed to the tip of the rod 127 moves in the arcuate guide hole 57H of the positioning member 57 in the direction of the arrow h with the movement of the rod 127, whereby the film positioning member is moved. 57 is rotated in the direction of arrow b. As a result, the pins 58A and 58B of the film positioning member 57 are pulled out of the perforation of the film 13 in the gate section 40, and the film 13 is unlocked.

As described above, when the film 13 in the suction port 81 is pulled by a predetermined distance in the direction opposite to the arrow d by the discharge sprocket 91 (FIG. 4) rotating at a constant speed, the coil portion of the gate portion 40 is moved. Even when 75 does not pull the positioning member 57, the film-positioning member 57 of the gate portion 40 is pulled by the rod 127 because the discharge-side loop setting roller 121 of the safety device 120 is pulled by the film 13. The lock is released and the film 13 is prevented from being damaged.

Incidentally, in FIG. 3 showing the back side of the support plate 11, the link 131 fitted and fixed to the rotation shaft 122 of the rotation arm 123 of the safety device 120 (FIG. 14) is
2, the discharge-side loop setting roller 121 provided at the lower end of the rotating arm 123 is constantly urged in the direction of returning the film 13 into the suction port 81. Accordingly, when the positioning member 57 of the gate portion 40 is unlocked by the rod 127 of the safety device 120 and the film 13 is unlocked, the link 131 is rotated by the spring 132 in the direction of the arrow i, thereby discharging the film. The side loop setting roller 121 feeds the film 13 to the suction port 81.
It moves in the direction of returning to the inside (the direction of arrow d in FIG. 14). As a result, the film 13 returns to the suction port 81, and returns to a position where the film 13 comes into contact with the film contact surface 81A by the suction force of the suction port 81.

Here, the case where the film 13 is attached to or detached from the projection device section 20 will be described. 2 and 4, a film pressing portion 49 of the projection device 20 is supported by a rotating shaft 43, and a user rotates a handle 45 provided at a tip end of the rotating shaft 43 so that the film is rotated. The pressing portion 49 can be switched to the pressing state of the film 13 shown in FIG. 4 or the released state of the film 13 shown in FIG.

The rotating shaft 43 supporting the film pressing portion 49 (FIG. 4) has a link 135 as shown in FIG. The link 135 can rotate in the direction indicated by the arrow j or in the opposite direction according to the rotation of the rotation shaft 43. FIG.
As shown in FIG. 3, in a state where the film pressing portion 49 presses the film 13, the link 135 as shown in FIG.
Is positioned by fitting a positioning roller 138 supported by a leaf spring 139 into the positioning V groove 135A.

At this time, the fan-shaped link 137 is rotated through the rod-shaped link 136 engaged with the link 135.
It is held at a position (FIG. 3) rotated in the direction of the arrow k around the rotation center 42. The pivot shaft 142 to which the link 137 is fitted and fixed is attached to the pivot arm 1 on the front side shown in FIG.
43 are fitted and fixed. A supply-side loop setting roller 141 is rotatably supported at the tip of the rotating arm 143. Accordingly, when the fan-shaped link 137 is rotated in the direction of arrow k by the rod-shaped link 136 on the back side (FIG. 3), the rotating arm 1 on the front side (FIG. 4).
The supply-side loop setting roller 141 at the tip of 43 is indicated by an arrow l
It turns to the state rotated in the direction. Therefore, the film holding section 4
When the user 9 presses the film 13 by the user (FIG. 4), the supply-side loop setting roller 141 rotates in the direction of the arrow l and is held in a state of not contacting the film 13.

At this time, the link 135 on the back side (FIG. 3)
13 which is engaged with the rod through a rod-shaped link 151
1 is held in a state of being rotated in the direction of the arrow i by the urging force of the spring 132 as the link 151 moves in the direction of the arrow i. Accordingly, the rotation arm 123 fitted to the front end (FIG. 4) of the rotation shaft 122 of the link 131 moves the discharge side loop setting roller 121 pivotally supported at the lower end thereof into the suction port 81. (In the direction of arrow d).

When switching the film holding section 49 from this state to a state in which the film 13 is released as shown in FIG. 16, the user first turns the film holding section 49 in the direction opposite to the arrow m. At this time, the link 135 shown in FIG.
Is rotated in the direction of arrow j, so that the V-groove 135A
The roller 138 that has been fitted into the is pressed down.

As a result, as shown in FIG.
The pressing switch 14 is driven by a leaf spring 139 supporting
5 is pressed. The output of the pressing switch 145 is sent to the plunger 161, and the plunger 161 is turned on in response to the pressing operation of the pressing switch 145,
The movable shaft 162 is pulled in the direction of arrow n. As a result, the rod 131 engaged with the movable shaft 162 is pulled in the same direction of the arrow n so that the link 131 is
2 rotates in the direction opposite to the direction of the arrow i against the urging force.

Accordingly, the rotating arm 1 fitted on the rotating shaft 122 of the link 131 on the surface side of the support plate 11
23 (FIG. 14) is the safety device 12 described above with respect to FIG.
By performing the same operation as that of the film 0, the film positioning member 57 of the gate section 40 is pulled out of the perforation of the film 13.

At this time, the user moves the rotating shaft 43 to the arrow m.
The link 135 (FIG. 1)
When 7) rotates in the direction of the arrow J, the fan-shaped link 137 rotates in the direction opposite to the arrow k via the link 136. In response to the rotation of the link 136, the supply-side loop setting roller 141 at the tip of the rotation arm 143 shown in FIG. 13 rotates in the direction opposite to the arrow l and pulls the film 13. At this time, since the pins 58A and 58B of the film positioning member 57 in the gate section 40 are pulled out of the film perforation, the pins 58A and 5B
8B can prevent the film 13 from being damaged.

The user further moves the rotation shaft 4 from the state shown in FIG.
3 is rotated, and as shown in FIG.
When the link 9 is completely raised, as shown in FIG. 18, the link 135 rotates in the direction of the arrow j to move the V groove 1 for positioning.
35B, positioning roller 1 supported by leaf spring 139
38 is positioned in a state of being fitted.

At this time, the fan-shaped link 137 is held via the rod-shaped link 136 at a position turned around the turning shaft 142 in the direction opposite to the arrow k. As a result, the rotating arm 143 on the front side (FIG. 16) of the support plate 11
The supply-side loop setting roller 141 at the end of is rotated in the direction opposite to the arrow l. Therefore, the film holding section 4
9 releases the film 13 by the user (FIG. 1).
In 6), the supply-side loop setting roller 141 rotates in the direction opposite to the arrow l to pull the film 13 by a predetermined length.

At this time, the back side of the support plate 11 (FIG. 18)
The link 131 engaged with the link 135 via the rod-shaped link 151 moves in the direction opposite to the arrow i against the urging force of the spring 132 as the link 151 moves in the direction opposite to the arrow i. It is held in a state of being rotated. Accordingly, the turning arm 123 fitted to the front end (FIG. 16) of the turning shaft 122 of the link 131 moves the discharge side loop setting roller 121 pivotally supported at the lower end thereof outwardly of the suction port 81 (see FIG. (The direction opposite to the arrow d).
Hold that state. As a result, the film 13 engaged with the discharge-side loop setting roller 121 is also separated from the suction hole 83 of the suction port 81 in the same manner, so that the film 13 is fast-forwarded, rewound, or the film 13 is mounted or removed. In this case, the suction force of the suction port 81 can be prevented.

In this state, even if the roller 138 is fitted into the V groove 135B of the link 135 and the pressing switch 145 is turned off as shown in FIG. 18, the discharge side loop setting roller 121 is pivotally supported. Rotating arm 123
When the safety device 120 operates in response to the turning operation of the pin 5, the pin 5 of the film positioning member 57 of the gate portion 40 is moved.
8A and 58B are pulled out of the perforation of the film 13, so that the gate portion 4
At 0, the film 13 remains unlocked.

In the released state of the film (FIGS. 16 and 18), the film 13 is mounted or removed. When the film 13 is mounted, the film 13 is suspended over the supply-side sprocket 31, the supply-side loop setting roller 141, the discharge-side loop setting roller 121, and the discharge-side sprocket 91.
3 is rotated in the direction of arrow m shown in FIG.

At this time, when the link 135 shown in FIG. 18 rotates in the direction opposite to the arrow j, the roller 138 is pushed down, and the pressing switch 145 is pressed (turned on). As a result, the plunger 161 operates, the movable shaft 162 is pulled in the direction of the arrow n, and the link 131 is rotationally biased in the direction opposite to the direction of the arrow i until the roller 138 is completely fitted into the V groove 135A of the link 135. Hold. Thus, when the user completely rotates the rotation shaft 43 (FIG. 16) in the direction of the arrow m, and the film pressing portion 49 presses the film 13 at the gate portion 40 as shown in FIG. 14, the link as shown in FIG. When the roller 138 is completely fitted into the V groove 135A of the 135, the pressing switch 145 returns to the off state, and the movable shaft 1 of the plunger 161 is turned off.
When 62 returns in the direction opposite to the arrow n, the pins 58A and 58B of the film positioning member 57 (FIG. 4) are inserted into the perforations of the film 13, and
To lock.

By the way, in FIG.
Is rotated in the direction opposite to the arrow m, and the film holding portion 49 is set in the film release state, and accordingly, the link 137 on the back side of the support plate 11 rotates in the direction opposite to the arrow k as shown in FIG. In this state, the lever 156 of the switch unit 155 is pushed up to push the switch piece 157. As a result, a drive signal (drive voltage) for rotating the sprocket motor 101 at a high speed is sent from the switch section 155 to a motor drive amplifier, which will be described later, and the film 13 is ready for fast forward or rewind.
Therefore, in this state, when the user operates a predetermined operation element (not shown), the output of the drive amplifier is sent to the sprocket motor 101, and the film 13 can be fast-forwarded or rewound.

(3) Circuit Configuration of Telecine Device In FIG.
Is input to the sync separation circuit 171 to extract a vertical sync signal SYNC _V from the video signal VD. In the case of this embodiment, a video signal of 60 fields per second can be obtained by the video signal VD of the NTSC system. Accordingly, the vertical synchronizing signal SYNC _V is output as a control signal of the switch circuit 173 at a timing of 1/60 second.

The switch circuit 173 is a circuit for confirming the operation of the telecine mechanism even when the video camera is switched off, and the video signal VD is supplied to the first input terminal 173a.
And the oscillation circuit 1 is connected to the second input terminal 173b.
72 receives the oscillation output signal S172. The oscillation output signal S172 is a pulse signal of 60 pulses per second. Accordingly, the switch circuit 173 switches the input terminal to the second input terminal 173b when the vertical synchronizing signal output from the synchronizing separation circuit 171 is not input, so that the video signal V
When there is no D, the oscillation output (60 [pulses / second]) of the oscillation circuit 172 is used as an alternative to the vertical synchronization signal of the video camera S17.
2 to the subsequent delay circuit 174.

The delay circuit 174 changes the resistance value of the variable resistor R11 to delay the pulse signal S174 by a time corresponding to the resistance value. This delay time corresponds to the shutter plate 52 fixed to the rotation shaft of the shutter motor 61.
It is adjusted by the user to synchronize with the rotation of FIG. 7 and to match the timing of the vertical synchronization signal of the video camera 26 with the timing of the shutter openings 53A to 53E.

That is, in FIG. 7, the shutter plate 52 has five field areas FIELD _{A to} FIELD _E corresponding to each field of the video camera 26. Each of the field regions FIELD _{A to} FIELD _E has a through hole 52.
A to 52E are equally spaced (72 °), and each of the field regions FIELD _{A to} FIELD _E has one shutter opening 53A to 53E.

As shown in FIG. 4, the shutter guard plate for supporting the shutter 52 is provided with photosensors 56A and 56B, which are a combination of a light emitting element and a light receiving element, and the through holes 52A-5 of the rotating shutter plate 52 are provided.
2E is detected by the photo sensor 56A, and the through holes 55A and 55B are detected by the photo sensor 56B.

The photo sensor 56A is connected to the gate 40
Of the shutter plate 52 by one field area (72 °). Therefore, for example, when the through-hole 52E of the shutter plate 52 is detected by the photo sensor 56A, the opening 4
At the center of 1A, a boundary between the fifth field region FIELD _E and the first field region FIELD _A of the shutter plate 52 (that is, a boundary including the through hole 52A) is located.

Accordingly, the photo sensor 56A is
By changing the variable resistor R11 of the delay circuit 174 (FIG. 19) so that each timing for detecting 2A to 52E is the vertical blanking period in the video camera, the shutter plate represented by each through hole 52A to 52E. 52 of field regions fIELD _a ~FIELD video camera 26 the timing of the boundary portion (hereinafter this is referred to as the vertical blanking region V _BLA ~V _BLE in shutter plate 52) passes through the opening 41A of the gate portion 40 of the _E
Can be synchronized with the vertical blanking period. In the case of this embodiment, the vertical blanking regions V _{BLA to} V _BLE of the shutter plate 52 are each formed with a width of 3 °.

The 60 [pulse / second] pulse signal S174 output from the delay circuit 174 in synchronization with the video camera 26 in this manner is input to the subsequent phase comparison circuit 175. The phase comparison circuit 175 controls the shutter motor 61
When rotated at 20 [RPM], the through-holes 52A to 52E formed in the respective vertical blanking regions V _{BLA to} V _BLE of the shutter plate 52 (FIG. 7) are detected by the photo sensor 56A. / Sec] and the pulse signal S174 output from the delay circuit 174, and compares the phase of the pulse signal S174 with the error signal S whose voltage value changes according to the phase difference.
175 is sent to the motor drive amplifier 176.

As shown in FIG. 20, a frequency generating rotary plate 191 is fixed to the output rotary shaft 62 of the shutter motor 61 in addition to the shutter plate 52, and rotates integrally with the output rotary shaft 62. A plurality of slits 191A are formed on the frequency generating rotary plate 191. The slits 191A are detected by the photo sensor 192, and are adapted to the rotational speed of the frequency generating rotary plate 191 (that is, the rotational speed of the shutter plate 52). A frequency signal SFG1 having a frequency (FIG. 1)
9) is fed back to the motor drive amplifier 176.

Accordingly, the motor drive amplifier 176 controls the shutter motor 61 in response to the frequency signal SFG 1 and the error signal S 175 output from the phase comparison circuit 175.
A drive signal S 176 having a voltage value capable of rotating at [RPM] is generated and sent to the shutter motor 61.

Thus, during the vertical blanking period of the video camera 26, the shutter motor 61
Vertical blanking areas V _{BLA to} V _BLE are gate sections 40
Is locked to the video camera 26 so as to pass through the opening 41A. For example, in FIG.
The timing (FIG. 21A) of each of the vertical blanking periods V1, V2, V3,... Of FIG. 6 corresponds to the vertical blanking regions V _BLA , V _BLB , V _{BLC of the} shutter 52 through the opening 41A of the gate section 40. ,... (FIG. 21B) coincide with the passing timing.

Accordingly, the timing at which the respective field areas FIELD _{A to} FIELD _{E of the} shutter plate 52 pass through the opening 41A of the gate section 40 is determined by the video camera 26.
, Each field period FIELD1, FIELD2,...
.., So that the shutter plate 52
, Each of the field regions FIELD _A , FIELD _B ,.
The shutter openings 53A, 53B,.
Gate unit 4 in each field of video camera 26
0 through the opening 41A.

Accordingly, in FIGS. 21A and 21B,
For example, the shutter opening 53A passes through the opening 41A of the gate section 40 during the first field period FIELD1 of the video camera from time t2 to time t6. As a result, the film 13 positioned at the gate portion 40 at this time is
Is the video camera 26 as the image of the first field.
It is shot in. Thereafter, similarly, each field period FIELD2 (time t7 to t10) of the video camera, FIE
At LD3 (time points t11 to t15),..., The frame of the film 13 positioned in the gate section 40 is captured by the video camera 26 as a field image.

Here, when the rotation of the shutter motor 61 is controlled at 720 [RPM], the through holes 55A and 55 of the shutter 52 (FIG. 7) which rotates integrally with the shutter motor 61 are used.
When the photo sensor 56B (FIG. 4) detects B, a pulse signal S61B of 24 [pulses / second] is obtained (FIG. 19). This pulse signal S61B is sent to the phase comparison circuit 181.

When the sprocket motor 101 rotates at 720 [RPM], the phase detector 181 detects the rotation of the sprocket motor 101 (FIG. 11 and FIG. 12).
A pulse signal S101 of 24 [pulses / second] obtained from the photo sensor 112 provided in the shutter motor 61
The phase is compared with the pulse signal S61B obtained from the side, an error signal S181 having a voltage value corresponding to the phase difference is generated, and this is sent to the motor drive amplifier 182.

When the command signal S _START for starting the film feeding by the user operating the operating element 185 is input to the motor driving amplifier 182, the photo sensor 113 provided in the rotation detecting unit 110 of the sprocket motor 101 is used. , A drive signal S1 for rotating the sprocket motor 101 at approximately 12 [rev / sec] (720 [RPM]) based on the frequency signal SFG2
82 is generated.

At this time, the motor drive amplifier 182 outputs the sprocket motor 101 at such a timing that the sprocket motor 101 is in phase lock with the shutter motor 61 by the error signal S181 output from the phase comparison circuit 181. In synchronization with the rotation of the shutter 52 (that is, in synchronization with the vertical blanking period of the video camera 26), the shutter 52 is rotated at 12 [rotation / sec].

The discharge-side sprocket 91, which is rotated at a constant speed by the sprocket motor 101, can advance the film by six frames in one rotation. Therefore, it is 1: 2 for the discharge side sprocket 91.
The sprocket motor 101 meshed with the gear ratio of
By rotating at a rate of [rotation / second], the discharge sprocket 91 is rotated at 4 [rotation / second], whereby the film 13 engaged with the discharge sprocket 91 is rotated by 24 rotations.
It can be sent continuously at [frame / second].

Incidentally, when the command signal S _STOP for stopping the film feed is input from the operating element 185, the motor driving amplifier 182 stops sending the driving signal S182 to the sprocket motor 101, and the film is quickly fed from the operating element 185. When the command signal _SFF or the rewind command signal _SREW is input, the drive signal S185 is output to the sprocket motor 1
01 is changed to a level at which high-speed rotation is performed.

Here, the through holes 55A and 55B for generating the pulse signal S61B formed in the shutter 52 are provided.
(FIG. 7) are formed at an angular interval of 180 °, and the timing from when the first through hole 55B is detected by the photo sensor 56B (FIG. 4) to when the second through hole 55A is detected. The three shutter openings 53A, 53B and 53C of the shutter plate 52 are
By passing through the opening 41A of FIG.
As shown in (C), the images of the same frame of the film 13 locked by the gate section 40 at the time points t3 to t14 are the first field FIELD1, the second field FIELD2, and the third field FI of the video camera 26.
Captured at ELD3.

After the three shutter openings 53A, 53B and 53C have passed through the gate section 40, the second through-hole 55A of the shutter plate 52 is connected to the photo sensor 56.
At time t14 detected by B, a pulse signal S101 is sent to the lock time control circuit 186 from the rotation detection unit 110 of the splash motor 101 synchronized with the shutter plate 52.

The lock time control circuit 186 has a mono-multivibrator configuration. Each time the pulse waveform of the pulse signal S101 is detected, the coil drive control signal S is set for a lock release time set to a predetermined time by the variable resistor R12.
186 is sent to the drive amplifier 187.

The drive amplifier 187 outputs the coil drive control signal S
While the signal 186 is being input, the current set by the variable resistor R13 is supplied to the coil unit 75 to operate the coil unit 75. As a result, as described above with reference to FIG.
5, the lock of the film 13 in the gate portion 40 is released.

This release time depends on the speed of the sprocket motor 10.
After the film 13 is unlocked in the gate section 40 (FIG. 4) based on the pulse signal S101 from the first rotation detecting section 110, the film 13 contacts the film contact surface 81A of the suction port 81 (FIG. 4). The time until contact is set. Accordingly, when the film 13 comes into contact with the film contact surface 81A of the suction port 81 due to the release of the lock, the operation of the coil portion 75 ends, and the film positioning member 57 of the gate portion 40 is again moved to the film 13 position.
The film 13 is locked by returning to the locking position. As a result, as described above with reference to FIG.
The film 13 in 1 is pulled in the direction opposite to the arrow d (FIG. 4) from the film contact surface 81A against the suction force of the suction port 81.

Thus, as shown in FIG. 21C, after the three shutter openings 53A, 53B and 53C pass through the gate section 40, when the lock of the film 13 in the gate section 40 is released at time t14, The film 13 is fed by one frame before a time t17 when a film feed period (Pull Down: PD) set by the lock time control circuit 186 elapses.

Incidentally, a mark 94 corresponding to the frame of the film is provided on the discharge-side sprocket 91, and the sprocket motor 101 is rotated by engaging the mark 94 with each frame of the film 13. The pulse signal S101 output from the detection unit 110 and each frame of the film 13 can be synchronized.

In the same manner, the second through hole 55
Between the timing when A is detected by the photo sensor 56B (FIG. 4) and the timing when the first through hole 55B is detected, the two shutter openings 5 of the shutter plate 52 are provided.
3D and 53E are openings 41A of the gate section 40 (FIG. 4).
21C, the images of the same frame of the film 13 locked to the gate unit 40 at the time points t17 to t24 are displayed in the fourth and fifth fields FIELD4 and F5 of the video camera 26 as shown in FIG. FI
Captured at ELD5.

At the time point t24 when the two shutter openings 53D and 53E have passed through the gate portion 40 and the first through hole 55B of the shutter plate 52 is detected by the photo sensor 56B, the shutter plate 53D and 53E are closed. 52
Rotation detection unit 11 of the sprocket motor 101 synchronized with the rotation
From 0, the pulse signal S101 changes to the lock time control circuit 186.
Sent to As a result, at time t24 in FIG.
In the film feed period PD set by the lock time control circuit 186 at t27, the film 13 is fed by the gate unit 40 for one frame. The locking and unlocking of the film 13 in the gate section 40 is repeated based on the pulse signal S101 output from the rotation detecting section 110 of the sprocket motor 101 rotating at a constant speed in this manner.

The frequency signal SFG2 output from the rotation detecting section 110 of the sprocket motor 101 and the frequency signal SFG3 shifted by a predetermined phase from the frequency signal SFG2 are sent to the direction decoding circuit 184, and the sprocket motor The rotation direction of 101 is detected. If the result of this detection is a direction in which the film 13 is rewound, a reverse rotation detection signal S184 is sent from the direction decoding circuit 184 to the plunger 161 described above with reference to FIG. The plunger 161 operates when the reverse rotation detection signal S184 is input, and forcibly releases the lock of the film 13 in the gate unit 40.

Similarly, when the switch 145 described above with reference to FIG. 17 is pressed, the output of the power supply V _CC is sent to the plunger 161 via the diode D12. Therefore, when the film 13 is set in the gate section 40, the pins 58A of the film positioning member 57 are set.
And 58B are pulled to the unlock position and the film 13
Perforation can be protected.

(4) Operation and Effect of the Embodiment In the above configuration, the film 13 of the intermittent feeding device 25 (FIG. 4) of the projection device 20 draws an arc inside the suction port 81 of the suction unit 80. After the curve, it is engaged with the discharge sprocket 91. In this state, the film 13 is sucked into the suction hole 83 by the negative pressure applied to the suction hole 83 of the suction port 81, and comes into contact with the film contact surface 81A formed with a predetermined curvature.

At this time, the film 1 is
When the discharge sprocket 91 is rotated at a constant speed while the lock 3 is locked by the pins 58A and 58B, the film 13 in the suction port 81 is pressed against the suction force of the suction hole 83 as indicated by an arrow d (FIG. 4). It is pulled in the opposite direction. At this time, when the film 13 is separated from the film contact surface 81A of the suction port 81, an urging force is generated in the film 13 in the direction in which the film 13 is pulled by the suction hole 83 (the direction of arrow d).

As a result, as shown in FIG.
In the state where the pins 58A and 58B of the film positioning member 57 are inserted into the perforations 13A and 13B, the film 13 is pulled in the direction of the arrow d.
3A and one of the inner surface 13A _A and 13B _A to pins 58A and 58B and 13B are film 13 is positioned in contact with each.

In such a positioning state, the opening 41 of the gate section 40 is connected to the shutter opening 53 of the shutter 52.
A (53B, 53C, 53D or 53E) passes through, and the video camera 26 captures an image of the frame of the film 13 that is positioned.

[0104] By one surface of the pins 58A and 58B in accordance connexion film positioned state is always abuts the perforations Ore Chillon 13A and one of the inner surface 13A _A and 13B _A of 13B, the film in the gate portion 40 1
The positioning accuracy of frame 3 is perforation 13A
And 13B and the accuracy of the position where the frame of the film 13 is formed. Therefore, even if the outer shape of the pins 58A and 58B is formed smaller than the shape of the perforations 13A and 13B, the frame of the film 13 is not covered by the gate portion 40.
The opening 41 is always locked at the same position. In this way, when frames of the film 13 are sequentially imaged by the video camera 26, image fluctuation of a shot image due to a frame position shift is prevented.

In the gate section 40, the film 13
In a state in which the nozzle 13 is positioned by the pins 58A and 58B, when the fin 13 is pulled from the inside of the suction port 81 by a predetermined length in a direction opposite to the arrow d by the discharge-side sprocket 91 rotating at a constant speed, the gate portion 40 is closed. The operation of the coil section 75 causes the positioning member 57 to rotate, and the pin 5
8A and 58B are the perforations 1 of the film 13.
Withdrawn from 3A and 13B.

At this timing, the film 13 in the suction port 81 is in the negative pressure range (ie, in the suction port 81) by the suction hole 83 of the suction port 81, and the film 13 released from the lock by the pins 58A and 58B is Then, the film is pulled back in the direction of arrow d to the film contact surface 81A in the suction port 81 by the negative pressure. Thus, the film 13 of the gate section 40 is fed in the direction of arrow d. The feed amount at this time is determined for one frame by the timing of the pulse signal A101 output from the sprocket motor 101 (FIG. 19) (that is, the timing at which the pins 58A and 58B are pulled out of the perforations 13A and 13B). ing.

The suction unit 80 is fastened and fixed to the support plate 11 by inserting screws 80A and 80B into elongated holes 80C and 80D formed in the side plate 85. Therefore, the entire suction portion 80 can be fixed while being shifted toward or away from the gate portion 40 within the movable range of the side plate 85 by the long holes 80C and 80D. Thus, when the lock of the film 13 is released in the gate section 40, the distance (that is, the feed amount of the film) by which the film 13 is pulled to the film contact surface 81A of the suction port 81 is adjusted according to the size of the frame. be able to.

As described above, the film 13 curved in an arc shape in the suction port 81 provided on the film feed side (downstream direction) of the gate section 40 is moved by the discharge sprocket 91 which rotates at a constant speed. The film 1 is pulled in the direction against the negative pressure of
3, the urging force is generated in the direction in which the film 3 is fed, and using the urging force and the pins 58A and 58B, the film 1 of the gate portion 40 is moved.
3 can be sent one frame at a time.

According to the above configuration, accurate intermittent feeding of the film 13 can be realized with a simple configuration without using a complicated configuration such as a Geneva gear as a device for intermittently feeding the film 13.

Incidentally, in the gate section 40, the film 1
3. The perforations 13A and 13A in which the outer shape of pins 58A and 58B for positioning
B, even if it is smaller than the shape of B, the pins 58A and 58B are connected to one inner surface 13A of the perforations 13A and 13B.
_A and 13B Since the film 13 is always positioned in contact with _A , various films (KS type, BH type, etc.) having different sizes of perforations can be easily used.

In the gate section 40, the film 1
After the pins 58A and 58B of the film positioning member 57 are pulled out from the perforations 13A and 13B of the third embodiment, the pin 58A is again turned on after a lapse of one frame feed time set by the lock time control circuit 186 (FIG. 19). When the perforations 13A and 13B do not arrive at the return positions of the pins 58A and 58B, the restoring force of the pins 58A and 58B is applied to the leaf springs 71 and 58B.
If the spring force is set so as not to damage the film in advance, the film 13 can be prevented from being damaged.

Further, since the feeding time of the film 13 can be shortened as compared with the conventional intermittent feeding method, the time for locking the film 13 within the same period can be lengthened, and the utilization efficiency of the light source light can be improved accordingly. I can do it.

(5) Other Embodiments In the above-described embodiment, a case has been described in which the film 13 on which one frame of image is recorded for each of four perforations is used. However, the present invention is not limited to this. By thinning out the pulse signal S101 output from the rotation detecting unit 110 of the sprocket motor 101, an image having another aspect ratio, such as a film in which one image (Vista Vision size) is recorded for every eight perforations, is obtained. The present invention can also be applied to a film in which is recorded.

In the above-described embodiment, the light diffuser 23 made of a dichroic mirror as the light guide of the light source.
However, the present invention is not limited to this. For example, an optical differential user whose inside is mirror-finished by chrome plating may be used.

Further, in the above-described embodiment, the film 13 is increased by 6 every time the discharge sprocket 91 rotates once.
Although the case of using one that advances by the frame has been described, the present invention is not limited to this, and various sizes can be used. In this case, the rotation detecting unit 110 provided in the sprocket motor 101 for driving the discharge side sprocket.
It is sufficient to change the timing of the pulse signal S101 output from.

In the above-described embodiment, the video of the film 13 is converted to N by using the NTSC video camera 26.
Although the description has been given of the case where the video signal is converted into the video signal of the TSC system, the present invention is not limited to this. In this case, according to the timing of each field of the video signal, the position and / or number of the shutter openings and the through holes 52A to 52E and 55 for timing detection are provided.
What is necessary is just to change the position and / or number of A and 55B, respectively.

In the above-described embodiment, the present invention is applied to the projection device 20 and the intermittent feed device 2 of the telecine device 10.
5, the present invention is not limited to this, and the present invention can be applied to a theater projector.

Further, in the above-described embodiment, the case where the present invention is applied to the projection device unit 20 and the intermittent feed device unit 25 of the telecine apparatus 10 has been described. The present invention can also be applied to an apparatus that intermittently feeds a product placed on a carrier.

[0119]

As described above, according to the present invention, since the film is intermittently fed by using the negative pressure of air, the structure can be simplified and the number of wear parts can be reduced. And maintenance can be simplified accordingly.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a telecine device using an intermittent feed device and a projection device according to the present invention.

FIG. 2 is a partial perspective view showing one embodiment of an intermittent feeding device and a projection device according to the present invention.

FIG. 3 is a rear view showing the configuration of the back side of the intermittent feeder according to the present invention.

FIG. 4 is a front view showing a film positioning state of the intermittent feeder according to the present invention.

FIG. 5 is a partial perspective view showing a film holding member of the intermittent feeder according to the present invention.

FIG. 6 is a partial cross-sectional view showing a configuration of a gate unit of the projection device according to the present invention.

FIG. 7 is a plan view showing a configuration of a shutter plate of the projection device according to the present invention.

FIG. 8 is a partial perspective view showing a positioning member of the intermittent feeder according to the present invention.

FIG. 9 is a sectional view showing a film positioning state by a positioning member of the intermittent feeder according to the present invention.

FIG. 10 is a cross-sectional view showing an unlocked state of the film by the coil portion of the intermittent feeder according to the present invention.

FIG. 11 is a front view showing a sprocket motor of the intermittent feeder according to the present invention.

FIG. 12 is a side view showing a sprocket motor of the intermittent feeder according to the present invention.

FIG. 13 is a front view showing an unlocked state of the film in the intermittent feeder according to the present invention.

FIG. 14 is a front view showing the unlocked state of the film by the safety device of the intermittent feeder according to the present invention.

FIG. 15 is a sectional view showing a film unlocked state by the safety device of the intermittent feeder according to the present invention.

FIG. 16 is a front view showing a film release state of the intermittent feeder according to the present invention.

FIG. 17 is a rear view showing the operation state of the plunger of the intermittent feeder according to the present invention.

FIG. 18 is a rear view showing a film released state of the intermittent feeder according to the present invention.

FIG. 19 is a block diagram showing an embodiment of a telecine apparatus using the intermittent feeding device and the projection device according to the present invention.

FIG. 20 is a partial plan view showing a configuration of a shutter motor of the projection device according to the present invention.

FIG. 21 is a timing chart for explaining a shooting operation and an intermittent feeding operation of a film of the intermittent feeding device and the projection device according to the present invention.

FIG. 22 is a partial plan view for explaining a film positioning state of the intermittent feeder according to the present invention.

FIG. 23 is a side view showing a configuration of a Geneva gear used as a conventional intermittent feed device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Geneva gear, 10 ... Telecine device, 13 ... Film, 13A, 13B ... Performation, 20
... Projection device section, 21... Light source section, 22.
… Optical defuser, 25… Intermittent feed unit, 26…
... video camera, 31 ... supply sprocket, 40 ...
... Gate part, 41A ... Opening part, 52 ... Shutter plate,
53A to 53E: shutter opening, 57: positioning member, 58A, 58B: pin, 61: shutter motor, 75: coil, 80: suction unit, 81: suction port, 81A: film contact Contact surface, 83 ... suction hole,
Reference numeral 91: discharge side sprocket, 101: sprocket motor, 110: rotation detector, 161: plunger, 186: lock time control circuit.

Claims (4)

[Claims] 1. A film intermittent feeding device for intermittently feeding a film, comprising: a film feeding means for feeding the film by negative pressure; and a positioning means for positioning the film on an upstream side of the film feeding means. A film intermittent feeder. 2. The film feeding means according to claim 1, wherein the film at the positioning position by the positioning means is pulled by pulling an outer peripheral surface of the film obtained by curving the film in an arc shape by the negative pressure. 2. The film intermittent feeder according to claim 1, wherein a feed force is generated to send the feeder to a downstream side provided with a feeder. 3. A light source; a light guide for guiding light from the light source to a film positioning position; positioning means for positioning the film at the film positioning position; and film feeding means for feeding the film by negative pressure. And a shutter for irradiating the film at the positioning position with the light source light for a predetermined period while the film is positioned at the positioning position by the positioning means. 4. The projection device according to claim 3, wherein said light guide is a dichroic mirror for transmitting heat to the outside.