JPH0738064B2 - Long film feeding and winding device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long film feeding / winding device that feeds and winds a long film having a hole, which is housed in a film magazine, frame by frame.

[Conventional technology]

In a photographing device such as a security camera or a camera for ID photo that requires a large number of photographing with one roll of film, for example,
Perforated long film of 100 foot, 150 foot or 200 foot is used.

Such a long film (hereinafter referred to as "film")
Is normally stored in a film magazine and shielded from outside light, and a part of it is pulled out from the film magazine and fed to the aperture part of the photographing device for photographing, and one frame is again fed after photographing. Ready for the next shoot.

The applicants have previously separated such a film magazine into a supply-side magazine that stores an unexposed film and a take-up-side magazine that stores a photographed film that is drawn from the supply-side magazine and photographed. Formed on the body and separably combined, in case of emergency the film is cut midway and only the take-up magazine is taken out to enable processing,
The film left in the supply side magazine can be used by connecting the spare winding side magazine, and the film magazine for the security camera that can continue shooting after the trouble without any problems is applied. (Actual exploitation 61-198939
No.).

FIG. 7 is a plan view showing the internal structure of the film magazine. The film magazine comprises a supply-side magazine 11 and a take-up magazine 12, which are usually integrally connected by screws.

The supply shaft 13 of the supply magazine 11 is equipped with a supply spool 1 formed by winding an unexposed long film.
An empty take-up spool 2 is mounted on the take-up shaft 14 of 12.

The film 3 drawn out from the supply spool 1 is guided from the slit 11a to the outside of the supply side magazine 11 through the guide rollers 15 and 16, and is drawn into the winding side magazine 12 from the slit 12a, and the winding sprocket 17 and the guide. The film 3 taken up by the take-up spool 2 via the roller 18 and pulled out to the outside is sent to the aperture section on the side of the image taking apparatus to take an image.

When the film is fed, the supply shaft 13 is fitted with a leaf spring or the like between the fixing portion and a suitable portion so as to prevent the supply spool from excessively rotating due to inertia and feeding the film more than necessary. Friction is given.

When the film magazine is loaded, the hoisting sprocket 17 and the hoisting shaft 14 are connected to a driving member on the side of the photographing device to wind up one frame each, but there is no friction between the take-up shaft 14 and the take-up spool 2. Is provided to absorb the fluctuation of the diameter of the winding film by slipping the rotation of the winding spool 2.

In addition, in the conventional photographing apparatus using the long film, only one powerful motor covers the feeding and winding of the film as described above as well as the winding of the shutter.

[Problems to be Solved by the Invention]

However, in such a conventional long film feeding / winding device, the driving member on the photographing device side is rotatably driven by a transmission mechanism using a gear and a belt from one motor so that Since the film was fed against the frictional force on the winding side, a powerful motor was required to feed the film, making the shooting device large and heavy, and the noise generated from the conduction mechanism was large, so it was quiet. There was a problem with the security cameras and wildlife observing cameras that were required.

Further, if the frictional force acting on the take-up shaft 14 is too strong, the take-up of the film becomes extremely heavy, and if it is too light, the take-up spool 2 slips more than necessary, making it difficult to take up the film. It took a lot of time and effort to adjust the frictional force.

Furthermore, there is a fear that the frictional force adjusted in this way may also gradually change over time.

The present invention solves such a conventional problem and provides a noise-free long film feeding / winding device which facilitates winding and winding by eliminating a mechanical transmission mechanism and a troublesome friction mechanism for adjustment. The purpose is to do.

[Means for Solving the Problems]

In order to achieve the above object, a long film feeding / winding device according to the present invention is a long film for feeding and winding a perforated long film stored in a film magazine by a driving mechanism on the photographing device side. In the feeding / winding device, on the film magazine side, a feeding shaft to which the feeding spool wound with the film should be mounted, a feeding sprocket for pulling the film out of the feeding spool, and a winding for winding the film pulled out by the feeding sprocket. An upper sprocket, a winding shaft to which a winding spool for winding the film wound by the winding sprocket should be attached, and a feeding motor capable of rotationally driving the feeding sprocket and a hoisting sprocket on the photographing device side. A winding motor that can drive the rotation of the film, a winding motor that can drive the rotation of the winding shaft, and a completion signal issued when the film magazine is completely loaded. Means for controlling the energizing time to the winding motor so as to remove the slack of the supply side film by the completion signal detected by this means, and at the same time, to remove the slack of the winding shaft film. A means for controlling the energization time to the feeding motor and a means for controlling the energization time to the feeding motor so that at least one frame of slack is removed by the means. is there.

Further, in such a long film feeding and winding device,
Means for detecting a completion signal generated by the completion of photographing on the photographing device side, and means for controlling the energization time to the feeding motor so as to form at least one slack by the completion signal detected by this means. It is preferable to provide means for respectively controlling the energizing time to the hoisting motor and the winding motor so that one frame is wound and wound.

Further, a means for detecting the rotation angle of the winding motor required to wind one film frame on the side of the photographing device, and the winding diameter of the winding spool is calculated from the rotation angle detected by this means. It is preferable to provide a means for controlling and a means for controlling the energization time to the winding motor corresponding to the winding shaft calculated by this means.

[Action]

With the above-described configuration, the film feeding and winding can be performed by the three motors of the feeding motor, the hoisting motor, and the winding motor, respectively.
The speed of film feeding can be increased, and a mechanical conduction mechanism is not required, and noise during film feeding and winding can be significantly reduced.

At the same time, since there is no loss of force due to the complicated conduction mechanism, each motor can be small and power consumption can be reduced.

At the time of loading the film magazine, the slack for at least one frame is formed on the supply side film. Therefore, when the long film is loaded in the film magazine in the dark, it is necessary to form the slack for one frame by hand. No, the film loading becomes significantly easier.

Further, if the slack for at least one frame is automatically formed at the time of completion of shooting, the film can be wound easily and the shooting interval at the time of continuous shooting can be shortened.

Furthermore, if the energization time to the winding motor is controlled according to the winding diameter of the winding spool, it is not necessary to absorb the fluctuation of the winding diameter by the slip mechanism due to friction, and the troublesome friction No need to adjust force.

〔Example〕

An embodiment in which the present invention is applied to a security camera will be described below with reference to FIGS. 1 to 6 of the accompanying drawings.

FIG. 1 is a plan view showing the structure of an embodiment of the present invention, and FIG.
The drawing is an explanatory view schematically showing the structure, and the same parts as those in FIG. 7 are designated by the same reference numerals and the description thereof will be omitted.

The film magazine 10 used in this embodiment is provided with a feeding sprocket 19 on its supply side in place of the guide roller 16 shown in FIG.

Then, in the magazine room machine board 21 of the camera body 20 of the security camera which is loaded with the film magazine 10 and is a photographing device, the feeding sprocket 19, the winding sprocket 17 and the winding shaft 14 on the film magazine side are respectively rotated. A feeding drive member 22, a hoisting drive member 23, and a winding drive member 24, which can be fitted so as to move in unison with each other, are provided. Drive in the film feeding direction.

The feeding motor 32 and the winding motor 34 are both DC motors, and the hoisting motor 33 is a pulse motor. Each of the motors 32, 33, 34 is a feeding encoder 35 for detecting a rotation angle as shown in FIG. , A hoist encoder 36, and a take-up encoder 37. Of these, the encoders 35 and 36 are different in 90 degree phase shift.
Different types of signal outputs can be obtained.

Further, as shown in FIG. 1, the camera body 20 includes a photographing lens 25, a photographing aperture 26, a film crimping plate 27 for crimping the film 3 onto the aperture 26, and a slit 28a by one rotation (FIG. 2). A shutter motor 29 including a shutter disk 28 that exposes the film 3 through the and a pulse motor that rotationally drives the shutter disk 28 is provided.
After loading the film magazine, a cover (not shown) is provided to close the magazine chamber and block external light.

FIG. 3 is a block diagram showing the entire structure including the control unit of this embodiment. This security camera is composed of a camera body 20 and a control device 40, and the portion surrounded by the broken line in the drawing is the film feeding / winding unit. The part relevant to an apparatus is shown.

In addition to the above, the camera body 20 includes a photometric device 51 for controlling the rotation speed of the shutter disk 28 according to the film sensitivity and the subject brightness, a date module for outputting a date signal of the shooting date and time. Yule 52, its power supply 53, test switch 54 for test shooting, open / close switch 55 that is turned on when the film magazine loading is completed, display LED 56 indicating a normal operating state, LED 57 for copying the device number to the film and these memories, It is equipped with a central processing unit (hereinafter referred to as "CPU") 60 that controls computation and control.

In the figure, 61 is a memory for storing that the film magazine 10 has been loaded, 31 is a shutter trigger signal output section, 29a,
32a, 33a, 34a are respectively a shutter motor 29 and a feeding motor 3
2, drivers for the hoisting motor 33 and the take-up motor 34, and 29b, 33b are counter electromotive force generation preventing circuits.

In addition, the control device 40 is configured separately from the camera body 20, and a photometer including the motors 29, 32, 33, 34 of the camera body 20 and various film sensitivity input sections from the built-in external power source through the power supply filter 41. Electric power is supplied to each circuit unit via the device 51 and the logic power supply 42.

The control unit 40 includes a frame number switching unit 43 for selecting the number of frames to be photographed per second, a switching unit 44 for selecting one of the camera bodies installed at different locations, and a release unit 45 for sending a photographing signal. And the film magazine 10 on the camera body 20
It has an input section 46 for receiving a signal loaded with a and a count signal input section 47 for the number of photographed frames.

Next, an outline of the film feeding / winding action of the security camera having the above-described structure will be described with reference to the flow chart of FIG.

With the film magazine 10 loaded in the magazine chamber of the camera body 20 and the power turned on, it is detected whether or not the cover of the magazine chamber is closed (step). Do not feed or wind.

When the cover is closed, it detects whether or not there is an external power source (step), and if not, does not feed or wind the film.

When an external power source is connected, the shutter motor 29 is first rotated in the forward or reverse direction until it reaches a predetermined position (step), and then the hoisting motor 33 and the winding motor 34 are energized for a predetermined time, respectively. After the slack of the film and the winding slack on the winding spool are removed, the feeding motor 32 is energized for a predetermined time to form at least one frame of slack, which is the starting point of the film feeding and winding (step ).

Here, when the release signal of the control device 40 sends a photographing signal to the camera body 20 side (step), the shutter motor 29 is energized and the shutter disk 28 makes one rotation to operate the shutter (step), thereby operating the shutter. When the winding is completed, the winding motor 33 and the winding motor 34 are energized to wind the film by one frame (step), and when the winding is completed, the feeding motor 32 is turned on and the film is shown in FIGS. 1 and 2. Thus, the slack 3a for at least one frame is formed (step).

In this way, when aerial photographing is performed a predetermined number of times, the unexposed portion of the film reaches the aperture 6 and the photographing becomes possible.

Here, the steps of the flow chart shown in FIG.
, Will be described in more detail with reference to FIGS. 5 and 6.

In step, since the shutter motor 29 that drives the shutter disk 28 is a pulse motor, the turning position of the shutter disk 28 may shift by one pole of the motor when the power is turned on. The shutter does not work properly.

Therefore, as shown in FIG. 5, a concave portion 28b is formed in the circumferential portion of the shutter disk 28, and the concave portion 28b is formed in the camera body side fixing portion.
The light emitting portion and the light receiving portion of the transmission type photo sensor 38 are provided so as to face each other, and when the shutter disk 28 is at the reference position, the light emitted from the light emitting portion passes through the concave portion 28b and is received by the light receiving portion. The correctness of the rotational position of the shutter disk 28 can be detected.

Then, when the shutter disk recess 28b at the time of power-on is not in a position facing the photo sensor 38, the shutter motor 29 is energized to reverse the shutter disk 28 by a predetermined angle to detect the reference position and hold it at that position. .

If the reference position is not found due to the reverse rotation of the predetermined angle, the shutter disc 28 is normally rotated until the reference position is reached.

As a result, the shutter disk 28 can be set to the reference position without exposing the film on the aperture 26 to light.

Further, FIG. 6 shows a timing diagram of each part when setting the initial state of the film in step.

When the film magazine 10 is loaded into the magazine chamber of the camera body 20 and the cover is closed, the open / close switch 55 turns on,
The hoisting motor 33 is energized for a predetermined time, and the hoisting sprocket 17
Is rotated in the winding direction, and the winding motor 34 is energized for a predetermined time to rotate the winding shaft 14 in the winding direction.

As a result, the slack in the linear portion of the film passing through the aperture 26 and the slack in the winding tip of the winding spool 2 are eliminated.

After that, the feeding motor is energized, and the feeding sprocket 19 feeds the film for one frame to form the slack 3a (Figs. 1 and 2) on the feeding side, and the release state is established.

When the film magazine 10 is loaded in the camera body 20 and the cover is closed and the camera body 20 is not connected to the control device 40, the external power supply is in the off state. Both 33 and 34 remain inactive.

At this time, when the open / close switch 55 is turned on by closing the cover, the signal is stored in the memory 61, and the above operation is performed with the external power source turned on.

When the camera to be photographed is selected on the control device 40 side and the number of frames to be photographed per second is set, and then a photographing signal is input, the shutter motor 29 is energized and the shutter disk 28 makes one rotation to activate the shutter. Then, the released count signal is output from the camera body side and the number of releases is displayed on the controller device 40.

When one release operation is completed, the feeding motor 32 is energized by the photographing signal trigger, the feeding sprocket 19 is rotated to feed the film from the feeding spool 1, and the pulse from the encoder 35 is counted to count the film. The feeding amount is detected, and when the pulse for one frame is detected, the feeding motor 32 is de-energized to stop the feeding of the film.

At the same time, the hoisting motor 33 and the take-up motor 34 are energized, and a drive pulse for one frame is applied to the hoisting motor 33 to wind the film by one frame. And the winding failure is detected, the winding motor 34 is energized for a calculation time to be described later, and when the pulse from the winding encoder 37 reaches one film, the motor is turned off and the film is turned off. Wind up.

In this way, when the empty release and the empty winding are repeated a predetermined number of times, the film portion exposed outside the film magazine is wound and the unexposed portion is sent to the aperture 26.
The first shot is ready.

In the film winding and winding process, the rotation angle of the winding sprocket 17 is always the same, but the winding diameter of the winding spool 2 is gradually increased by the winding, so that the rotation angle of the winding shaft 14 is decreased. There must be.

Therefore, in the winding of the first sheet, the number of pulses from the winding encoder 37 is counted based on the winding diameter divided in advance to control the energization time to the winding motor 34, but from the next winding. By counting the number of pulses of the previous winding encoder 37, the next film winding diameter is calculated in consideration of the film thickness, and the winding motor is inversely proportional to the calculated winding diameter.
Controls energization time to 34.

As a result, the film wound by the hoisting sprocket 17 can be wound on the take-up spool 2 without excess or deficiency, and the operation failure between the take-up shaft 14 and the take-up spool 2 which has been conventionally required. The stable slip mechanism is omitted.

Since the feeding motor 32 is not a pulse motor in practice, there is a possibility that it will slightly rotate due to inertia when the energization is stopped and the feeding amount of the film may become one frame or more. It does not matter that the slack is slightly increased, and that amount may be corrected at the next feeding.

That is, the energization time to the next feeding motor 32 is reduced by the amount of pulses from the feeding encoder 35 exceeding one frame.

In the above embodiments, the case where the present invention is applied to the security camera has been described. However, the present invention is not limited to this, and can be applied to various photographing devices using a long film.

The film magazine that can be used in the present invention is not limited to the above, and an integrated type may be used.

〔The invention's effect〕

As described above, according to the present invention, the feeding and winding of the long film are carried out by the three motors of the feeding motor, the hoisting motor and the winding motor, respectively. The various conduction mechanisms that were required are no longer necessary, noise generated by these conduction mechanisms can be significantly reduced, and the speed of film feeding can be increased, so that the number of images that can be taken within a predetermined time is increased.

Moreover, since there is no loss of force due to the complicated conduction mechanism, each motor can be small and power consumption is reduced.

And, since the slack is automatically formed on the supply side film when loading the film magazine, it is possible to save the time and effort to form a slack for one frame when loading the film in the dark in the dark place. Can be significantly facilitated.

Further, if the slack is automatically formed on the supply side film at the completion of each photographing, the film can be rolled up easily.

Furthermore, by controlling the power supply to the winding motor according to the winding diameter of the winding spool, the wound film can always be wound without excess or deficiency. Since it is not necessary to provide a friction slip mechanism between them, troublesome adjustment of friction force is unnecessary, and extremely stable winding of the film becomes possible.

[Brief description of drawings]

FIG. 1 is a plan view showing the construction of an embodiment of the present invention, FIG. 2 is an explanatory view showing the construction thereof as a model, and FIG. 3 is a block diagram showing the overall construction including the control unit. FIG. 4 is a flow chart showing its action, FIG. 5 is an explanatory view showing a method for detecting the rotational position of the shutter disk, FIG. 6 is a timing diagram showing the timing of each part when the film is loaded, and FIG. The figure is a plan view showing the internal structure of a conventional film magazine. 1 ... Supply spool, 2 ... Take-up spool 3 ... Film, 10 ... Film magazine 13 ... Supply shaft, 14 ... Take-up shaft 17 ... Hoisting sprocket 19 ... Feeding sprocket 20 ... Camera body, 22 ... Feeding drive member 23 … Hoisting drive member, 24… Winding drive member 25… Shooting lens, 26… Aperture 28… Shutter disk, 29… Shutter motor 32… Feed motor, 33… Housing motor 34… Wind motor, 35… Feed Encoder 36 ... Winding encoder, 37 ... Winding encoder 40 ... Control device, 60 ... CPU

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-50-141324 (JP, A) JP-A-58-172149 (JP, A) JP-A-47-2526 (JP, A) JP-B 57- 46536 (JP, B2)

Claims (3)

[Claims] 1. A long film feeding / winding device for feeding and winding a perforated long film stored in a film magazine by a driving mechanism on the photographing device side, wherein a film is wound on the film magazine side. A supply shaft to which the rotated supply spool is to be mounted, a feeding sprocket that draws a film from the feeding spool, a winding sprocket that winds the film drawn by the feeding sprocket, and a film that is wound by the winding sprocket. A take-up spool to which a take-up spool for taking up the take-up spool is mounted; A take-up motor capable of rotating the take-up shaft, means for detecting a completion signal generated by the completion of loading the film magazine, and means for detecting the completion signal. A means for controlling the energization time to the winding motor so as to remove the slack of the supply side film by the detected completion signal and to control the energization time to the winding motor so as to remove the slack of the winding side film. And a means for controlling the energization time of the feeding motor so that at least one frame of slack is formed on the supply-side film from which the slack has been removed by the means. Device. 2. A means for detecting, on the side of the photographing device, a completion signal generated upon completion of photographing, and energization of a feeding motor so as to form a slack for at least one frame by the completion signal detected by the means. 2. The long film feeding and winding device according to claim 1, further comprising means for controlling the time and means for respectively controlling the energizing time to the winding motor and the winding motor so as to wind and wind one frame. 3. A means for detecting a rotation angle of a winding motor required to wind up one frame of film on the photographing device side, and a winding spool for winding from a rotation angle detected by the means. 3. The long film feeding winding according to claim 1, further comprising: a means for calculating a diameter, and a means for controlling an energization time to the winding motor in accordance with the winding diameter calculated by the means. Device.