JPH01310339A - Photographic printer - Google Patents

Abstract

PURPOSE:To perform image observation without dazzle by casting a light beam for image observation the instant a light beam for printing is shielded, in which case a moving case is turned. CONSTITUTION:When judged that the opening of a fixed case 30 is opened, then judging that a moving case 32 is turned because of the observation of a negative image or the exchange of a diffusion box 28; in such a case, a motor drives to insert a part acting as the shutter of a rotating disc 26 into an optical path so that the light beam, which is cast from a light source 24, is shielded, and also a light source 22 for observation is turned on. When the moving case 32 is in a retreat position, the light beam for printing is shielded and the light beam for the negative image observation is cast, and thus, the observation of the negative image is performed without dazzle. Additionally, the dazzle is prevented at the time of exchanging the diffusion box 28 because the light beam for printing is shielded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a photographic printing device, and in particular, a photoprinting device in which a diffusion portion for diffusing printing light is rotatably attached to an irradiation portion for irradiating printing light. This paper relates to a Royal type photographic printer.

[Prior Art] In a photographic printer that prints images onto photographic paper, a diffusion box housed in a case is provided between a negative carrier and a light source, and the light rays emitted from the light source are diffused through the diffusion box. The image is then irradiated onto negative film and printed onto photographic paper. The inner diameter of this type of diffusion box is determined according to the size of the negative film, so if you use a different size negative film, each time you use it, replace it with a diffusion box of a size that corresponds to the size of the negative film. There is a need.

Conventionally, this problem has been dealt with by attaching the case removably and replacing the diffusion box with the case when using negative films of different sizes. However, in this case, a large number of cases corresponding to many types of diffusion boxes of different sizes are required, resulting in high cost.

For this reason, the present applicant attached a movable case rotatably to the horizontally fixed irradiation unit which has an opening at one end and irradiates the printing light from this opening, and installed the moving case inside the movable case. We have already proposed an upright type photoprinting device with a removably housed diffusion box (Japanese Patent Application No. 1983-10).
No. 382).

[Problems to be Solved by the Invention] However, the photographic printing apparatus already proposed by the present applicant is of the royal type and has a case housing a diffusion box on the negative image observation side. It is difficult to observe the image of the negative film held between the negative carriers because the moving case becomes an obstacle, and when the moving case is rotated to observe the image, the opening of the irradiation part is opened and the image is emitted from this opening. There is a problem in that since the printing light is irradiated and the negative film held between the negative carriers is no longer irradiated, the illumination becomes dark and it becomes difficult to observe the image.

The present applicant has developed a device to solve the above-mentioned problems, and when the moving case is rotated, the negative film is automatically illuminated even when wiped, so that the image on the negative film can be observed. The purpose of the present invention is to provide a photographic printing device that is

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an irradiation section that has an opening at one end and irradiates a printing beam from the opening, and an irradiation section that can open and close the opening. At the same time, with the opening closed, the printing light is diffused and guided toward the negative film held between the negative carriers, and with the opening opened, it is located at a retracted position away from the negative film. a diffusion section; a detector for detecting whether the opening of the irradiation section is opened; an observation light source for irradiating a light beam for observing an image of a negative film held between a negative carrier; and the opening. and a control device that turns on the observation light source when opening of the observation light source is detected.

[Function] The irradiation section of the present invention includes an opening, and a printing light beam is irradiated from the opening. The sales promotion section is installed so that the opening of the irradiation section can be opened and closed, and with the opening closed, it diffuses the printing light rays emitted from the irradiation section and guides it toward the negative film held between the negative carriers. do. Further, the diffusion section is located at a retracted position away from the negative film with the opening section open. When the opening of the opening is detected by the detector, the control section turns on the observation light source to irradiate a light beam for observing the image of the negative film held between the negative carriers. As a result, even when the diffuser, which becomes an obstacle, is moved to the retracted position in order to observe the image on the negative film, the negative film is illuminated by the observation light source, making it possible to easily observe the image.

[Effects of the Invention] As explained above, according to the present invention, since the observation light source is turned on when the diffuser is moved to the retracted position, it is easy to see the image on the negative film held between the negative carriers. [Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 show a photographic printing apparatus 10 to which the present invention is applicable. In the photographic printing apparatus 10, as shown in FIG.
It is designed to burn the image to 0. Near the lens unit 18, an observation light source 22 that emits a light beam for observing a negative image is arranged.

The light source section 12 is composed of an irradiation section whose outer circumference is made up of a fixed case 30 and a diffusion section whose outer circumference is made up of a movable case 32.
A rotating disk 26 equipped with color separation filters of , B is attached and housed in a movable case 32, and a styrofoam diffusion box 28 is removably attached, and the light emitted from the light source 24 is transmitted to the rotating disk 26. The light is diffused by a diffusion box 28 through a filter and irradiated onto the negative film 16.

The dimensions of the inner surface 28A of the diffusion box 28 are determined according to the size of the negative film 16, and when negative films 16 of different sizes are used, a diffusion box corresponding to the size of the negative film 16 is used. There is.

The fixed case 30 is fixed to the machine base 34 with screws (not shown), and a hinge 40 is provided at the opening on the downstream side of the optical path (right side in FIG. 1).
, a magnet 42 is attached for attachment of the movable case 32.

The movable case 32 is attached by the hinge 40 so that the opening of the fixed case 30 can be opened and closed, and is rotated approximately 180 degrees counterclockwise around the hinge 40 from the printing light guide position shown in FIG. It is possible to move to the retracted position shown in the figure. An adsorption iron piece 48 is attached to the movable case 32 via a bracket 46 (FIG. 2) and is adsorbed to the magnet 42, preventing the movable case 32 from inadvertently rotating around the hinge 40 due to the adsorption force of the magnet 42. There is no such thing. Adsorption iron piece 48 is screw 4
It is attached to the bracket 46 at 9 and can be removed and attached at the retracted position (the position shown in FIG. 3).

A positioning protrusion 50 is formed on the inner wall of the movable case 32 facing the light source 24, and is used for attaching and detaching the diffusion box 28 together with the adsorption iron piece 48.

To explain in detail, the diffusion box 28 has the positioning protrusion 5
A recess 52 is formed corresponding to 0, and the positioning protrusion 50 is inserted into the recess 52 to prevent the positioning projection 50 from being displaced in any direction other than the upstream side of the optical path (left side in FIG. 1). On the upstream side of the optical path, the end 28B on the upstream side of the optical path is adsorbed by the adsorption iron piece 48 to prevent the position from shifting.
If the suction iron piece 48 is removed with the movable case 32 in the retracted position, the diffusion box 28 can be pulled out in the direction of the arrow in FIG. 3 and removed.

Furthermore, from the dismounted state of the diffusion box 28, by pushing the diffusion box 28 in the direction of arrow B in FIG. 3 and then attaching the suction iron piece 48, the diffusion box 28 can be installed as shown in FIG. ing.

Note that a part of the diffusion box 28 protrudes from the movable case 32 toward the downstream side of the optical path (lower side in FIG. 1), and a light-shielding tube 56 is attached to the outer periphery of this protrusion by adhesive or the like, and the light-shielding tube 56 securely It is designed to be shielded from light.

As shown in FIG. 4, an R photolysis filter 26A, a G photolysis filter 26B, and a B photolysis filter 26C are attached to the rotating disk 26 housed in the fixed case 30 at an angle of approximately 60 degrees. There is. In addition, rotating disk 2
A through hole 26D is formed at a position separated by an angle of approximately 120 degrees from the R light decomposition filter 26A of No.6. This through hole 26D is used for white exposure and the like. Rotating disk 260
Part 2 between B photolysis filter 26C and through hole 26D
A portion 26F between the 6E and B photolysis filters 26C and the through hole 26D acts as a shutter. This rotating disk 26 is connected to a pulley 31 of a motor 33 via a belt 29, and is rotated so that each filter is placed in the optical path according to the exposure conditions according to the additive color mixing method.

A limit switch 37 is installed in the opening of the fixed case 30 so as to be located between the fixed case 30 and the movable case 32.
(Fig. 2) is installed.

This limit switch 37 is turned off when the movable case 32 is located at the printing light guide position, and turned on when the movable case 32 is rotated toward the retracted position.

The limit switch 37 is connected to the microcomputer 3.
5. Also, the microcomputer 35
is connected to the observation light source 22 and the motor 33. The ROM of the microcomputer 35 stores in advance a control routine program to be described below.

The above control routine will be explained below with reference to FIG. In step 100, it is determined whether the movable case 32 has been rotated toward the retracted position and the opening of the fixed case 30 has been opened by determining whether the limit switch 37 has been turned on. When it is determined that the opening of the fixed case 30 is closed, the observation light source 22 is turned off in step 102. Step 1
When it is determined that the opening part of the fixed case 30 has been opened at 00, it is determined that the movable case has been rotated for image observation or for replacing the diffusion box, and step 1 is performed.
In step 04, the motor is driven to insert the portion 26E (or 26F) of the rotating disk 26 that acts as a shutter into the optical path so that the light beam emitted from the light source 24 is blocked, and in step 106, the light source for observation is 22 is lit.

As a result of the above control, when the movable case 32 is located at the retracted position, the printing light beam is blocked and the negative image observation light beam is irradiated, so that the negative image can be observed without being dazzled. . Furthermore, even when replacing the diffusion box, the printing light beam is blocked, thereby preventing dazzling.

Note that the diffusion box 28 has a positioning protrusion 50 in the recess 52.
It may be possible to make it detachable by press-fitting, etc., and pulling it out in the direction of the arrow in FIG. 3 and pushing in the direction of the arrow B in FIG. 3. Moreover, although an example in which a rotating disk is used as a shutter has been described above, an opening/closing type shutter may also be used.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a schematic structure of a photoprinting apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view corresponding to the plan view of FIG. 1,
FIG. 3 is a sectional view showing the operation of the movable case in FIG. 1 corresponding to FIG. 1, FIG. 4 is a plan view of the rotating disk, and FIG. 5 is a flowchart showing the control routine of this embodiment. . DESCRIPTION OF SYMBOLS 10... Photographic printing device, 16... Negative film, 24... Light source, 28... Diffusion box, 32... Movable case.

Claims (1)

[Claims] (1) An irradiation unit that has an opening at one end and emits a printing beam from the opening, and an irradiation unit that is attached so that the opening can be opened and closed, and that diffuses the printing beam with the opening closed. a diffusion section positioned at a retracted position away from the negative film with the opening opened, and a diffusion section that guides the film toward the negative film held by the negative carrier, and checks whether the opening of the irradiation section is opened or not. a detector for detecting, an observation light source for emitting a light beam for observing an image of a negative film held between a negative carrier, and a control device for lighting the observation light source when opening of the opening is detected. and photoprinting equipment, including;