JPH0731236Y2 - Enlarger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a stretcher for stretching a photographic print image on photographic paper.

[Conventional technology]

2. Description of the Related Art As a photographic enlarger, there is known one in which a column is erected on a table supporting photographic paper, and a filter and an enlargement lens are attached to a lower portion of a lamp house which is vertically movable along the column.

[Problems to be solved by the device]

By the way, in the above enlarger, a negative film is used as an original, the negative film is arranged between the lamp and the lens in the lamp house, the negative film is irradiated with the lamp light, and the light passing through the lens is placed on the table. Since it is printed on photographic paper, if the original is a photo print, it will be necessary to make a negative once, and it will take time and effort to enlarge it.
Since the lens is passed through when creating a negative and the lens and the negative are passed through during stretching, there is a problem that the resolution is lowered and a color change easily occurs.

Also, if the length of the pillar that guides the up-and-down movement of the lamp house is lengthened, the stability of the enlarger will deteriorate, and it will not be possible to make the pillar longer than necessary, so that the original image will be greatly enlarged or reduced. There is an inconvenience that cannot be done.

Therefore, the present invention solves the above-mentioned inconvenience, and provides an enlarger capable of enlarging or enlarging the image of a photographic print on a photographic paper and enlarging or reducing the image. It is a specific subject.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, in the present invention, a front plate of a lamp house having a pair of lamp housing cylinders housing a lamp and a filter at both ends, and the lamp housing cylinders are inclined in opposite directions. An original mounting hole is formed in the rear of the lamp house, a transparent window is provided on the rear plate of the lamp house so as to face the original mounting hole, and one end of a telescopic cylinder covering the translucent window is connected to the rear plate. An annular holder support plate to which a lens holder is detachably attached is attached to the other end, and a moving mechanism for moving the holder support plate with respect to the document attachment hole is provided.
On the back of the holder support plate, an inclined reflection mirror for reflecting the light passing through the lens of the lens holder downward is arranged, and a table for supporting photographic paper is provided below the mirror so as to be vertically movable. It was adopted.

[Action]

When enlarging the image of the photographic print, attach the photographic print to the print support plate, attach the print support plate to the front plate of the lamp house to close the document mounting hole, and position the photographic print in the document mounting hole. Let

After the above preparatory work, turn on the lamp and adjust the focus of the lens while observing the optical image on the easel placed on the table via the lens of the lens holder attached to the holder support plate and the reflection mirror. After adjustment, set the printing paper on the easel and print.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a support 2 is erected on a support 1, and a horizontally long arm 3 provided above the support 2 is supported movably in the length direction. .

FIGS. 3, 4, and 6 show examples of supporting the arm 3, in which a pair of linear raceways 4 are provided in parallel on the upper part of the inner surface of the arm 3 having a U-shaped cross section. A slide block 5 for guiding the movement of 4 is supported by a support plate 6 attached to the upper end of the column 2.

As shown in FIG. 5, the lamp house 7 attached to the tip of the arm 3 has a lamp housing cylinder portion 8 at both ends, and the lamp housing cylinder portion 8 is required for the front plate 9 of the lamp house 7. It is inclined in opposite directions with an angle. In the case of the embodiment, the inclination angle of the lamp housing tubular portion 8 with respect to the front plate 9 is 24 °.
The lamp 10 is placed inside the lamp housing tube portion 8.
A color correction filter 11 is incorporated in front of the lamp 10.

A document mounting hole 12 is formed in the front plate 9 of the lamp house 7,
On the other hand, the rear plate 13 is provided with a transparent window 14 facing the document mounting hole 12.

The telescopic tube 15 whose one end is connected to the rear plate 13 of the lamp house 7 covers the translucent window 14, and the annular holder support plate 16 is connected to the other end of the telescopic tube 15.

As shown in FIGS. 4 and 6, an angular recess 17 is formed on the back surface of the holder support plate 16, and the flange 20 of the lens holder 19 for supporting the stretchable lens 18 is fitted into the recess 17. There is. Further, a holding plate 21 for fixing the flange 20 is attached to the back surface of the holder supporting plate 16 by tightening a screw 22.

Therefore, the lens holder 19 can be attached to and detached from the holder support plate 16 so that arbitrary lens holders having different focal lengths can be attached.

As shown in FIG. 4, the upper portion of the holder supporting plate 16 is slidably supported along the track 4 provided inside the arm 3 and is moved by the moving mechanism 30.

As shown in FIG. 4, the moving mechanism 30 rotatably mounts a drive gear 32 and a pinion 33 meshing with the drive gear 32 in a bracket 31 that supports the support plate 6, and meshes with the pinion 33. A rack 34 is installed on the support plate 6, the rack 34 and the holder support plate 16 are connected by a rod 35, and the drive gear 32 is rotated by a handle 36 shown in FIGS. 3 and 7 to support the holder. The board 16 is moved.

In the embodiment, the member for guiding the movement of the rack 34 is omitted.

A reflection mirror 40 is provided behind the lens holder 19. The reflection mirror 40 is supported by the bracket 31 in an inclined shape, and reflects the light passing through the lens 18 downward.

A table 50 for supporting the printing paper is provided below the reflection mirror 40, and the table 50 is supported so as to be vertically movable along a vertically long rail 51 provided on one side surface of the support column 2, and the table 50 is provided. It is moved up and down by operation.

As shown in FIG. 1, the lifting drive device 60 rotatably supports the upper and lower ends of a screw rod 61 arranged inside the column 1, and attaches a nut 52 that meshes with the screw rod 61 to the table 50. ,
The screw rod 61 is rotated by a motor 63 mounted on the support 1.

The enlarger shown in the embodiment has the above-mentioned structure, and when enlarging the photographic print, the photographic print 71 is attached to the print supporting plate 70 shown by the chain line in FIG.
Attach 70 to the front of the front plate 9 of the lamp house 7
12 is closed and the photographic print 71 is positioned in the document mounting hole 12.

After mounting the original as described above, the lamp 10 is turned on to illuminate the photographic print 71, and the reflected light image from the photographic print 71 is formed on the easel 80 placed on the table 50 via the lens 18 and the mirror 40. Image and watch the image
Adjust the focus of 18.

When adjusting the focus, slide the arm 3 manually to make a large adjustment, and then move the handle 36 shown in FIG.
The holder support plate 16 is moved and finely adjusted by rotating the.

After the focus adjustment work as described above, a printing paper is placed on the easel 80, and the printing paper is printed.

At the time of printing, a lens 18 having a long focal length is used to reduce the image of the photographic print 71, and a lens 18 having a short focal length is used to enlarge the image. In this case, the lens 18 having a short focal length is supported by a cylindrical lens holder 19 having a flange 20 at the rear end, as shown in FIG.

When a photographic print 71 larger than the translucent window 14 is used, a mirror box 90 as shown in FIG. 9 is used.

This mirror box 90 has an opening that can be connected to the document mounting hole 12.
A print support plate 92 is detachably provided inside, and reflection mirrors 93 are provided on both sides between the print support plate 92 and the opening 91, and the light of the lamp 10 is reflected by the reflection mirror 93. The printed support plate 92 is illuminated by the reflected light.
Illuminates a photographic print 71 supported by.

[Effect of device]

As described above, according to the enlarger according to the present invention, the image of the photographic print can be directly enlarged on the photographic paper, and the lens holder is mounted on the holder supporting plate movably provided with respect to the light transmitting window. It is detachably attached, and the light passing through the lens of the lens holder is reflected downward by the mirror,
Since the table provided below the mirror is supported so as to be able to move up and down, the image of the photographic print can be greatly enlarged or reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a stretcher according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is a partially cutaway plan view of the same, and FIG. 5 and 5 are sectional views taken along the line VV of FIG. 1, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 4, and FIG. 7 is taken along the line VII-VII of FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 1, FIG. 9 is a partially cutaway plan view showing another example of the above, and FIG. 10 is another of the same lens holder. It is sectional drawing which shows an example. 7 ... Lamp house, 8 ... Lamp housing cylinder, 9 ... Front plate, 10 ... Lamp, 11 ... Filter, 12 ... Original mounting hole, 13 ... Rear plate, 14 ... Translucent window, 15 …… Telescopic tube, 16 ……
Holder support plate, 40 …… Reflecting mirror, 50 …… Table.

Claims (1)

[Scope of utility model registration request] 1. A document mounting hole is formed in a front plate of a lamp house which has a pair of lamp housing cylinders for housing a lamp and a filter at both ends, and the lamp housing cylinders are inclined in opposite directions, A transparent window is provided on the rear plate of the lamp house so as to face the original mounting hole, one end of a telescopic cylinder covering the translucent window is connected to the rear plate, and a lens holder is attached to and detached from the other end of the telescopic cylinder. An annular holder support plate that can be freely attached is attached, and a moving mechanism that moves the holder support plate with respect to the document attachment hole is provided. Light passing through the lens of the lens holder is directed downward at the back of the holder support plate. An enlarger in which an inclined reflection mirror for reflecting light is arranged, and a table for supporting photographic paper is provided below the mirror so that the table can be moved up and down.