JP2002236331A - Destaticizer for photographic film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress sticking of dust to a photographic film in areas where image information is acquired from the film by irradiation with rays. SOLUTION: This destaticizer has a cooling mechanism C for supplying cooling air to the film 1 supported by a film carrier FC of a scanner and a destaticizing housing H for a cooling air guide path 14 of this cooling mechanism C. An electrode 15 is housed into a hole formed at the destaticizing housing H so as to allow the passage of the cooling air and a high voltage is impressed to this electrode 15, by which the air ionized by the effect of the electrode 15 is guided to the cooling air guide path 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film static eliminator, and more particularly, to a technique for supplying ionized air to a photographic film to remove static electricity from the photographic film.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Application Publication No. 10-289796 discloses a technique relating to a photographic film static eliminator. This prior art applies a high DC voltage to a pair of positive and negative electrode needles, or applies a high AC voltage to a single electrode needle, thereby fanning ionized air generated by the electrode needle. To discharge electricity by spraying the object.

[0003]

It is preferable that dust is not adhered to a photographic film which is fed to a scanner or a film carrier of a projection exposure type printer which takes in image information of a photographic film by converting it into a digital signal. However, a photographic film made of a resin film is easily charged with static electricity, and even if a device for removing dust in a path for supplying the photographic film to the film carrier is provided, dust generated in the vicinity of the film carrier may adhere to the film. It is conceivable that a device capable of removing the dust is desired.

An object of the present invention is to rationally configure an apparatus capable of suppressing the attachment of dust to a photographic film at a site where image information is obtained from the photographic film.

[0005]

The features, operations and effects of the photographic film static eliminator according to claim 1 of the present invention are as follows. [Features] A static elimination housing provided with an electrode to which a high voltage for ionizing air is applied, and an application means for applying a high voltage to the electrodes of the static elimination housing, and the static elimination housing is provided with a light beam on a photographic film. Is provided in a cooling air supply path for supplying cooling air to a portion where image information is obtained by irradiating the cooling air.

According to the above feature, when a high voltage is applied to the electrodes of the static elimination housing from the applying means, the air is ionized by the electric field generated by the electrodes. It is sent to the site where the image information of the photographic film is obtained via the cooling air supply path, and the ionized air can act on the photographic film simultaneously with the cooling. As a result, for example, dust adheres to the photographic film at a site where image information is obtained only by providing in the existing cooling air supply path without performing complicated remodeling such as forming a special ventilation path for the film carrier. Phenomena can be suppressed and good image information can be obtained.

The features, functions and effects of the photographic film static eliminator according to claim 2 of the present invention are as follows. [Features] In the photographic film static eliminator of claim 1,
An insulating material in which the static elimination housing is formed with a pair of holes that open to the lower side in the direction of sending the cooling air, and a communication port that communicates with the holes and opens to an upper position in the direction of sending the cooling air; And a pair of electrodes of the positive electrode and the negative electrode is accommodated in each hole of the insulating material.

According to the above feature, the cooling air guided to the opening of the communication port contacts the electrode inside the hole.
Alternatively, it is ionized by approaching and then sent out from the opening of the hole to the lower side in the sending direction of the cooling air. Also, since holes are formed in the insulating material, the ionized air is not neutralized even if the ionized air contacts the inner wall of the holes inside the holes, and the ionized air is cooled together with the cooling air. It can be sent to film. As a result, the ionized air can be guided to the photographic film without waste and the photographic film can be neutralized.

The features, functions and effects of the photographic film static eliminator according to claim 3 of the present invention are as follows. [Features] In the photographic film static eliminator of claim 2,
The static elimination housing is configured to include a support plate in which the cooling air introduction portion and a detachable flange portion are formed in a cooling air supply path.

[Operation and Effect] According to the above feature, the static elimination housing is detachably provided to the cold air supply path via the flange, so that the flange is separated even when performing inspection or repair. It is not necessary to disassemble the entire cooling air supply path. As a result, maintenance can be easily performed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a film scanner for converting image information of a developed photographic film 1 into a digital signal and taking in the digital signal is configured. This film scanner is a film carrier F that transports a long photographic film 1 such as 135 size or 120 size.
C, the light source 2 is arranged above the film carrier FC, the sensor unit S is arranged below the film carrier FC, and the film carrier FC
Is provided with a cooling mechanism C for supplying cooling air from below.

Although not shown, the light source 2 adjusts the color distribution of the light from the halogen lamp by the light control filter, adjusts the intensity distribution by the mirror tunnel, and guides the light downward along the optical axis indicated by L in the figure by the reflection of the mirror. It is configured as follows. The sensor unit S includes an optical lens 3 disposed at a portion where a light beam transmitted through the photographic film 1 is guided, and a CCD type line sensor 4 disposed at a position where a frame image of the photographic film 1 is formed by the optical lens 3. It is provided with.

The film carrier FC is configured to be detachable from a support member 6 of a table 5 of a film scanner. The film carrier FC includes an upper plate 7 disposed vertically above and below a path for transporting the photographic film 1. , The lower plate 8 is configured to be freely openable and closable. The upper plate 7 and the lower plate 8 have rollers 9, 9 for conveying the photographic film 1 in a pressed state. An aperture 7A for taking in a light beam is formed, and a slit 8A for transmitting a light beam transmitted through the photographic film 1 downward is formed in the lower plate 8.

As shown in FIG. 2, the cooling mechanism C includes an air filter 11 for removing dust from the air to be sucked, an air pump 12 for sucking and sending air through the air filter 11, and an air pump 12. Air hose 13 for sending air (air) of the air hose 13
And a cooling air guide path 14 for guiding air from the cooling medium to the lower surface of the film carrier FC. When the cooling mechanism C is operated, the cooling air sent from the cooling air guide path 14 The cooling air moves along the lower surface, and a part of the cooling air contacts the photographic film 1 at the slit 8A to prevent the temperature of the photographic film 1 from rising. The cooling air guide path 14 forms a cooling air supply path, and a part of the cooling air is discharged from a gap between the film carrier FC and the support member 6 after cooling the film carrier FC and peripheral devices. It is configured to:

The configuration described above is basically the same as a conventional film scanner.
It relates to a static eliminator provided for the cooling mechanism C.

In the static elimination device of the present invention, the cooling air guide path 1
The static elimination housing H is detachably provided to the cooling air guide path 14 so as to ionize the air sent through the housing 4.
And a high voltage generating circuit 17 as an application unit for applying a high voltage to the electrode 15 of the static elimination housing H via a cable 16.

That is, as shown in FIGS. 3 to 5, the static elimination housing H is electrically insulated from a metal supporting plate 18 having a flange portion detachable from the cooling air guide path 14. And a pair of electrodes 15 for ionizing air with respect to the insulating material 19. Further, a connecting pipe 20 (an example of a cooling air introduction portion) for connecting the air hose 13 is fixed to the support plate 18.
Holes 18A, 1
9A, a screw 21 is inserted into each of the holes 18A and 19A, and the static elimination housing H is cooled.
4 so that it can be tightened and fixed and can be separated.

An insulating material 19 is fixed to the support plate 18 with screws 22, and a pair of holes 19B opened to the lower side in the cooling air feeding direction with respect to the insulating material 19,
19B, a pair of electrodes 15 and 15 of a positive electrode and a negative electrode are housed in each of the holes 19B and 19B, and communicate with the base end side of each of the electrodes 15 and 15 to feed the cooling air The communication ports 19C, 19C which are open to the upper position in FIG. Further, terminals 23, 23 that are electrically connected to the electrode 15 are protruded from the side surface of the insulating material 19, and the respective terminals 2
The voltage from the high voltage generating circuit 17 is applied to the cables 3 and 23 via the cables 16 and 16.

By operating this static eliminator, air is ionized by the electric field generated by the electrodes 15, 15, and the ionized air is transferred to the photographic film through the cooling air guide path 14. 1 is sent to the site where the image information is acquired, thereby causing ionized air to act on the photographic film 1 at the same time as the cooling, and as a result, the photographic film 1 is neutralized and the phenomenon that dust adheres to the photographic film 1 is suppressed. Image information can be obtained. An electrode 15 is provided for a hole 19B formed in the insulating material 19, and a communication port 19C is provided for the hole 19B.
The ionized state is maintained even if the ionized air inside the hole 19B comes into contact with the inner wall of the hole 19B, so that the ionized air can be sent out without waste and the photographic film 1 can be neutralized. It has become.

[Other Embodiments] The present invention is not limited to the above embodiment. For example, in a projection printer, a cooling mechanism having a structure for supplying cooling air to a portion irradiated with a light beam from a light source may be used. It is also possible to provide for the wind supply path.

[Brief description of the drawings]

FIG. 1 is an enlarged front view of a portion of a film carrier of a film scanner.

FIG. 2 is a sectional view showing an arrangement of a static eliminator;

FIG. 3 is a sectional view of a static elimination housing.

FIG. 4 is a bottom view of the static elimination housing.

FIG. 5 is a perspective view of a static elimination housing.

[Explanation of symbols]

 15 Electrode 18 Support plate 19 Insulating material 19B Hole 19C Communication port H Static electricity elimination housing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Miyawaki 579-Umehara, Wakayama-shi, Wakayama Prefecture No-Ritsu Koki Co., Ltd. F-term (reference) 2H109 CA12 CA21 5G067 AA23 AA65 BA02 DA01 DA14 DA17

Claims (3)

[Claims] 1. A static elimination housing provided with an electrode to which a high voltage for ionizing air is applied, and an application means for applying a high voltage to the electrodes of the static elimination housing, and the static elimination housing is provided with a photographic film. A photographic film static eliminator provided in a cooling air supply path for supplying cooling air to a portion where image information is acquired by irradiating light to the camera. 2. A pair of holes, wherein the static elimination housing is open to the lower side in the direction of sending the cooling air, and a communication port which communicates with the holes and opens to an upper position in the direction of sending the cooling air. 2. The photographic film static eliminator according to claim 1, further comprising a formed insulating material, wherein a pair of the positive electrode and the negative electrode are housed in respective holes of the insulating material. 3. The static elimination of a photographic film according to claim 2, wherein the static elimination housing includes a support plate having the cooling air introduction portion and a flange portion detachably mounted on the cooling air supply path. apparatus.