JP3254506B2 - Photo printing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic printing apparatus for exposing an image of an original to a photosensitive material through a lens.

[0002]

2. Description of the Related Art As described above, in a photographic printing apparatus for exposing an image of an original image to a photosensitive material through a lens, there is a type in which a lens is exchanged depending on, for example, the type of the original image and the photosensitive material.

In this lens replacement, for example, in the case where a light-shielding cover is provided on a lens mount, the light-shielding cover is removed and the lens is replaced from the side opposite to the original image. In some cases, for example, the lens mount is pulled out to the front and the lens exchange is performed from the original image side.

[0004]

However, in the former case, it is necessary to remove the light shielding cover from the lens mount, and it takes time and effort to replace the lens.

In the latter case, for example, in the case of a short focus lens, since the lens and the original image are close to each other, there is a possibility of interference when the lens mount is pulled out to the front, and it is difficult to change the lens with one touch.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object to provide a photographic printing apparatus which can easily and easily replace a lens with a single touch in a short time.

[0007]

According to a first aspect of the present invention, there is provided a photographic printing apparatus for exposing an image of an original image on a photosensitive material through a lens.
An original image mounting base elevating mechanism for elevating and lowering the original image mounting base on which the original image is set, a lens mounting base elevating mechanism for elevating and lowering the lens mounting base on which the lens is mounted, and lens replacement input means for outputting a lens replacement command; The image forming apparatus further includes a control unit that controls the original image mounting base elevating mechanism and the lens mounting base elevating mechanism based on the exchange command to increase a distance between the original image mounting base and the lens mounting base.

[0008]

According to the first aspect of the present invention, a lens replacement command is output by operating the lens replacement input means, and the control unit controls the original mounting base lifting mechanism and the lens mounting base lifting mechanism based on the replacement command. Automatically widens the distance between the original image mount and the lens mount. Therefore, the lens can be exchanged between the original image mounting base and the lens mounting base, and the lens exchange can be performed easily and quickly with one touch.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the photographic printing apparatus according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of the photographic printing apparatus, and FIG. 2 is a side view of the photographic printing apparatus.

A guide column 2 is provided upright at the center of the rear portion of the main body 1 of the photographic printing apparatus. An original image mount 3 and a lens mount 4 are provided on the guide column 2 so as to be able to move up and down. A light source box 5 is mounted on the upper part of the original image mounting base 3, and a light source 6 such as a halogen lamp and a reflection mirror 7 are provided in the light source box 5. An original image guide 8 is provided below the light source box 5 so as to face the original image mounting table 3, and the original image 9 is held on the original image mounting table 3 by the original image guide 8. A light-shielding skirt 10 is provided below the original image mounting base 3.

A lens 12 is interchangeably mounted on the upper part of the lens mount 4 via a holding base 11, and a dark shutter 13 is provided below the lens mount 4. Further, a light-shielding bellows 14 that can expand and contract in the vertical direction is provided between the lens mount 4 and the main body 1.

The interior of the main body 1 is a dark room.
The interior is partitioned by a light shielding wall 15 into an exposure room 16 and a magazine storage room 17. The magazine storage chamber 17 stores a magazine 19 for storing a photosensitive material 18 wound in a roll shape.
Conveyed by 0.

In the exposure chamber 16, a translucent focus glass 21 is provided at a position directly below the lens mount 4 horizontally with the original 9 and the photosensitive material 18 is conveyed on the focus glass 21. Above the focus glass 21, a grill 22 is arranged. An image of the original 9 formed through the lens 12 is projected on the focus glass 21. By moving the original 9 or changing the magnification of the image projected on the focus glass 21, trimming can be performed on the printing surface side. The Fresnel lens 2 is located below the focus glass 21.
The Fresnel lens 25 compensates for insufficient illuminance.

The photosensitive material 18 after the printing is cut by a cutter 26, and the cut photosensitive material 18 is stored in a storage case 28 via a holding plate 27.
The transport of the photosensitive material 18 is performed by a photosensitive material transport mechanism 29 controlled by the control unit 24. The photosensitive material transport mechanism 29 operates after the pressing of the printing start switch on the operation unit 24 until the printing is completed. Is controlled so that the photosensitive material 18 is not positioned on the focus glass 21.

A reflecting mirror 30 is provided on the optical axis below the focus glass 21. The reflecting mirror 31 guides the optical axis hanging down from above to the reflecting mirror 31 disposed on the upper rear surface of the main body 1. Further, the light is guided from the reflection mirror 31 to the electronic camera 33 via the filter 32. As the electronic camera 33, for example, a CCD camera is used.
The electronic camera 33 is mounted inside the upper part of the main body 1.

A monitor 34 is arranged on the upper part of the main body 1,
For example, a CRT monitor is used as the monitor 34,
An image of the original image 9 captured by the electronic camera 33 is displayed on the monitor 34. The electronic camera 33 employs a variable shutter speed system to adjust for insufficient illuminance on the surface of the focusing glass 21.

In this photographic printing apparatus, when the photosensitive material 18 is not on the focus glass 21, that is, when the photosensitive material 18 is not printed, the image of the original 9 formed on the surface of the focus glass 21 is passed through the focus glass 21. And a reflection mirror 3
Images are taken by an electronic camera 33 via the filters 0 and 31 and a filter 32, and an image of the original image 9 taken by the electronic camera 33 is displayed on a monitor 34. Therefore, the operator can position the printing position on the printing surface side by moving or changing the magnification of the original image 9 while viewing the image of the original image 9 displayed on the monitor 34, and further perform trimming.

Thereafter, when a printing start switch of the operation section 23 is pressed, the photosensitive material transport mechanism 29 causes the photosensitive material 1 to move.
The original 8 is conveyed and positioned on the surface of the focus glass 21. In this state, the image of the original 9 is exposed on the photosensitive material 18, and printing is automatically performed.

In this photo printing apparatus, the original image mounting base 3 and the lens mounting base 4 are respectively provided on a slide shaft 40 provided on the guide column 2 so as to be able to move up and down. , And the lens mount 4 is connected to a lens mount raising / lowering chain 42.

The original mounting base lifting / lowering chain 41 is wound around upper and lower sprockets 43 and 44 and is driven by an original mounting base raising / lowering motor 45. The original mounting base lifting mechanism for raising / lowering the original mounting base 3 on which the original 9 is set. A.

Similarly, the lens mounting base elevating chain 42 is wound around the upper and lower sprockets 46 and 47, and is driven by the lens mounting base elevating motor 48.
A lens mounting base lifting mechanism B that raises and lowers the lens mounting base 4 on which the lens mount 2 is mounted.

For example, a servo motor is used as the original mounting base lifting motor 45 and the lens mounting base lifting motor 48, and is controlled by the controller 24 via a driver 49. Encoder signals indicating the positions of the original image mount 3 and the lens mount 4 are input to the control unit 24 via the driver 49 from the original image mount motor 45 and the lens mount motor 48, and the control unit 24 outputs the original image. The positions of the mount 3 and the lens mount 4 are confirmed.

An original image mounting base origin detecting sensor 50 is provided above the slide shaft 40, and an original image mounting base origin detecting blade 51 is provided above the original image mounting base 3 so as to face the original image mounting base origin detecting sensor 50. An origin detection signal from the original image mounting base origin detection sensor 50 is input to the control unit 24.

A lens mounting base origin detecting sensor 52 is provided below the original mounting base 3, and a lens mounting base origin detecting blade 53 is provided above the lens mounting base 4 in opposition to the lens mounting base origin detecting sensor 52. An origin detection signal from the lens mount base origin detection sensor 52 is provided to the control unit 24.

Therefore, when the power is turned on, the original mounting base lifting motor 45 is controlled by the control unit 24 via the driver 49 to raise the original mounting base 3, and the lens mounting base lifting motor 48 is controlled to control the lens mounting base 4. Rises. As a result, the original image mounting base origin detecting sensor 50 detects the original image mounting base origin detecting blade 51, and the original image mounting base origin detecting sensor 5 is detected.
An origin detection signal from 0 is input to the control unit 24. At the same time, the lens mount base origin detection sensor 52 detects the lens mount base origin detection blade 53, and an origin detection signal is input to the control unit 24, and the control unit 24 controls the reference positions of the original image mount 3 and the lens mount 4. Confirmation is performed.

The control unit 24 controls the driver 49 by inputting the operation keys up and down from the operation unit 24.
The original mounting base elevating motor 45 and the lens mounting base elevating motor 48 are controlled via the CPU and the original mounting base 3 and the lens mounting base 4 are controlled based on the set magnification and the focal length of the lens 12 to be used. Automatically moves up and down to the optimal height for the conditions and stops at that position.

The operation section 23 is provided with a lens exchange key 54 for outputting an instruction to exchange the lens 12, and the lens exchange key 54 constitutes a lens exchange input means C.

When the lens exchange key 54 is pressed, the control unit 24 determines the driver 49 according to the positions of the original image mounting base 3 and the lens mounting base 4 when the lens exchange key 54 is pressed.
The original mounting base lifting motor 45 and the lens mounting base lifting motor 48 are controlled via the
To increase the distance between them.

For example, the original image mounting base elevating motor 45 is driven to raise the original image mounting table 3, and is raised until the original image mounting table origin detection sensor 50 detects the original image mounting table origin detection blade 51. If the distance D between the original image mounting base 3 and the lens mounting base 4 is within a predetermined range due to the movement of the original image mounting base 3, the lens mounting base elevating motor 48 is driven to lower the lens mounting base 4, and the original image is lowered. The space between the mounting table 3 and the lens mounting table 4 is set to a predetermined distance.

On the other hand, if the distance D between the original image mounting table 3 and the lens mounting table 4 is greater than a predetermined value due to the movement of the original image mounting table 3, the lens mounting table elevating motor 48 is not driven.

As described above, the control unit 24 controls the original mounting base lifting mechanism A and the lens mounting base lifting mechanism B via the driver 49 based on the replacement command of the lens replacement key 54, and the original mounting base 3 and the lens mounting base are controlled. In order to widen the distance D with 4,
The lens 12 can be exchanged from between the original image mount 3 and the lens mount 4, and the lens exchange can be performed easily and quickly with one touch.

After the replacement of the lens, the focus is adjusted by changing the magnification of the operation key from the operation unit 23.

[0033]

As described above, according to the first aspect of the present invention, a lens replacement command is output by operating the lens replacement input means, and based on the replacement command, the control unit causes the control unit to raise and lower the original mounting base and the lens mounting mechanism. By controlling the platform elevating mechanism and automatically widening the distance between the original mount and the lens mount, it is possible to exchange lenses from between the original mount and the lens mount, and one-touch lens replacement And can be performed easily and in a short time.

[Brief description of the drawings]

FIG. 1 is a front view of a photo printing apparatus.

FIG. 2 is a side view of the photographic printing apparatus.

[Explanation of symbols]

 3 Original mounting base 4 Lens mounting base 9 Original 12 Lens 18 Photosensitive material 24 Control unit A Original mounting base lifting mechanism B Lens mounting base lifting mechanism C Lens exchange input means D Interval

Continuation of the front page (56) References JP-A-53-97818 (JP, A) JP-A-47-6835 (JP, A) JP-A-57-167021 (JP, A) JP-A-3-141342 (JP) JP-A-3-153228 (JP, A) JP-A-4-367847 (JP, A) JP-A-1-179136 (JP, A) JP-A-2-96130 (JP, A) 2-151847 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 27/46

Claims (1)

(57) [Claims] 1. A photographic printing apparatus in which an image of an original image is exposed on a photosensitive material via a lens, wherein an original image mounting table elevating mechanism for elevating and lowering an original image mounting table on which the original image is set, and a lens having the lens mounted thereon. A lens mounting base elevating mechanism for raising and lowering the mounting base, lens replacement input means for outputting the lens replacement command, and controlling the original mounting base lifting mechanism and the lens mounting base lifting mechanism based on the replacement command to mount the original. A photographic printing apparatus comprising: a control unit for increasing a distance between a table and the lens mount.