JP2556504Y2 - Film guide - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film guide for guiding negative films having different film widths in a film transport path of a photographic printing apparatus.

[0002]

2. Description of the Related Art Generally, a printing apparatus for printing a color image from a photographic negative film on photographic paper uses light from a light source in three primary colors based on data obtained by optically reading printing conditions such as image density from a negative film in advance. And a printing unit for irradiating a negative film with the density adjusted by each of the light control filters and irradiating the negative film on a photographic paper via a lens unit. A film guide is provided from the reading section to the printing section along a path for transporting the negative film. This film guide
For example, they are provided at appropriate positions and intervals such as the entrance of the reading unit and the position where the transport direction changes.

[0003] Negative films sent to such a transport path may be of different sizes and types such as, for example, 135 (35 mm) and 110 (16 mm). For this reason, conventionally, based on a film guide having a guide groove adapted to a small-sized film, a guide frame for regulating the width is opened and closed to guide a negative film having a different width.

[0004]

However, in the conventional film guide of the above-mentioned type in which the width is opened and closed and adjusted, the guide groove suitable for a small-sized film is shared with a large-sized negative film. Therefore, there is a problem that the width of the guide groove does not match and the guide function is reduced. Further, since the above-mentioned openable and closable film guide is of a type in which the width is manually adjusted, it is difficult to obtain guide width accuracy for a negative film of each size. Further, there is a problem that a mechanism for changing the guide width is complicated.

In this invention, taking into account the various problems of the conventional film guide described above, a second film guide which can be fitted into a notch of the reference film guide is made detachable by a rotation support portion. An object of the present invention is to provide a film guide having a guide groove which is compact, can be operated by one touch, and is adapted to each of films of different sizes.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a reference film guide having a guide groove for guiding a reference negative film and having a cutout on one side, and a small size fitting into the cutout. 1st place that can guide film
And the reference film can be guided
And a second film guide which is displaceable at a second position , wherein the second film guide has a guide groove for guiding a small-size negative film, and the second film guide is disposed in front of the second film guide.
Serial is from the first position to that the configuration of the second is displaced to a position comprising a rotating support part of the order film guide.

[0007] In the above solution, the rotation support portion may be a switching arm that rotates about a fulcrum pin attached to a reference film guide, a switching link having a fulcrum pin supported at the tip thereof inserted, and an end of the switching link inserted. The fulcrum pin is pivotally supported on the second film guide and is attached to the end of the fulcrum pin and is pivotally supported on the reference film guide side.
A switching link rotating about two fulcrums, and a spring stretched between a fulcrum pin of the switching arm base and a fulcrum pin pivotally supported by the second film guide can be provided.

[0008]

Since the film guide of the present invention is constructed as described above, the reference film guide is used to transport the reference film, the film is guided by the guide groove having the optimum width, and the second film is interposed therebetween. The guide escapes from the passage surface of the reference film to prevent the film from directly touching. When transporting a small-size negative film, the second film guide is pressed through the rotary support and pushed into the notch of the reference film guide, and the film passing surface is set at a position corresponding to the reference passing surface.
In this way, when a small-size negative film is inserted into the guide groove of the second film guide, the film is guided with the optimum guide groove width, and the guide function is well maintained.

When the second film guide is pressed by hand when the second film guide is used, the rotation support portion rotates while keeping the guide parallel to the reference guide, so that the second film guide is inserted into the notch of the reference film guide. set. At this time, the switching arm is pushed by hand, and the switching arm rotates around the fulcrum pin and transmits a force to the switching link via another fulcrum pin, whereby the second film guide is pushed. The separation of the second film guide is performed by operating in the reverse direction. In any case, the spring is set stably in any state by the spring.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic view of a photographic printing apparatus having a film guide according to an embodiment. The photo printing apparatus includes an image information reading unit 1 and a printing unit 2. A transport unit 3 is provided in the image information reading unit 1, and a negative film F delivered from a supply reel 4 wound by splicing a plurality of negative films is provided with a plurality of guide rollers 5.
The sheet is fed by rollers 6 via a film guide (not shown) described later, and the tension is adjusted by dancer rollers 7.

A notch detector 8, a splice detector 9, a DX code detector 10, and the like are provided in the middle of the transport path as shown. Further, along the route, a screen detector 12, an image density detector 13, a monitor TV camera 14, etc., which divide the light of the light source 11 composed of a halogen lamp in three directions and operate upon receiving one of them, are sequentially arranged. Is provided.

Before the notch detector 8, a screen detector 12
A film guide 30 according to the embodiment is provided between the image density detector 13 and the image density detector 13, between the image density detector 13 and the monitor TV camera 14, and behind the TV camera 14. Details of the film guide 30 are shown in FIG. The film guide 30 includes a reference film guide 31 and a second film guide 35. The reference film guide 31 has guide grooves 32, 32 for guiding a reference negative film in a cross section thereof, and a concave portion 33 therebetween. The second film guide 3 is provided on the opposite surface of the concave portion 33.
5 is provided with a cutout portion 34 large enough to take in and out. The entrances of the guide grooves 32, 32 are slightly tapered to smoothly receive the film.

The second film guide 35 has guide grooves 36, 36 for guiding a small-size negative film in its cross section, and a concave portion 37 therebetween. In addition, two
A horizontal plate 38 of a step is provided, and rotation levers 40 are provided at both ends of a fulcrum pin 39 inserted therebetween. The rotation lever 40 is rotatably provided about a fulcrum pin 43 pivotally supported by L-shaped arms 42 provided at one end of the reference film guide 31.

A switching link 44 that rotates around the pin 39 is attached to the pin 39. The switching link 44 is connected to a switching arm 46 that supports a fulcrum pin 45 rotatably inserted at the other end. . This switching arm 46
, A fulcrum pin 47 is inserted, and both ends of the fulcrum pin 47 are pivotally supported by the arms 42, 42. And the fulcrum pin 3
A spring 48 is stretched between 9 and 47.

FIG. 3 shows a cross section of the above structure taken along line III-III, and FIG. 4 shows a cross section taken along line IV-IV. As shown in FIG. 4, the second film guide 35
Are formed so that the right and left gaps are large on the right side. The guide grooves 32, 32 are for a reference negative film, and the width thereof is larger than the guide grooves 36 of the second film guide 35 for a small-size film.

A negative film is inserted into the film guide of the embodiment constructed as described above in the vertical direction of FIG.
The transport path is guided by this guide. When the transported negative film is a reference negative film (for example, a 135 film), the second film guide 35 is held at a position where it escapes from the film passage surface of the reference film guide 31 as shown in FIGS. ing. The reference negative film is conveyed while being guided between the guide grooves 32 without the screen touching anywhere.

Negative film of small size (for example,
0 film), the second film guide 3
5 is the concave portion 3 of the reference film guide 31 as shown in FIG.
3 and set so that the small-size negative film passage surface coincides with the reference film passage surface. This operation can be easily performed as follows. When the switching arm 46 is pressed, the switching arm 46 rotates about the fulcrum pin 47, the switching link 44 is pushed via the fulcrum pin 45 on the tip side, and the force is transmitted to the rotation lever 40 via the fulcrum pin 39, and this rotation is performed. The lever 40 rotates about the fulcrum pin 43.

When the rotary lever 40 rotates, the distance between the fulcrum pins 39 and 47 changes. Until the fulcrum pin 39 passes over a straight line passing through the fulcrum pins 43 to 47, the distance between the fulcrum points increases, and when it exceeds, the tension spring 48 tries to reduce the distance again. Rotate to the side. Therefore, the second film guide 35 is pressed via the fulcrum pin 39, and the bottom surface of the second film guide 35 contacts the bottom surface of the concave portion 33 of the reference film guide 31, as shown in FIG. When separating the second film guide 35,
The operation can be easily performed by pulling the switching arm 46 of the film guide 35 apart from the above operation.

[0019]

As described in detail above, the film guide of the present invention is provided between the reference film guide for guiding the reference negative film, the second film guide which is fitted in the notch portion and is detachably provided. Since it is composed of a rotating support part, it is possible to use a film guide having an optimal guide groove according to the type of negative film of each size, and it is possible to switch it easily with one touch and to improve the work efficiency,
In addition, various advantages can be obtained, such as an extremely compact unit.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram of a photographic printing apparatus having a film guide according to an embodiment.

FIG. 2 is an external perspective view of a film guide of the embodiment.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is a diagram for explaining the operation, and is a diagram corresponding to FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 scanner unit 2 printing unit 3 transport unit 30 film guide 31 reference film guide 32 guide groove 34 notch 35 second film guide 36 guide groove 39, 43, 45, 47 fulcrum pin 40 rotating lever 44 switching link 46 switching arm 48 spring

Claims (2)

(57) [Scope of request for utility model registration] 1. A reference film guide having a guide groove for guiding a reference negative film and having a notch on one side, and a first film that fits into the notch and can guide a small-sized film.
It is possible to guide the reference film by retracting from the position and the notch
And a second film guide that is displaceable at a second position , wherein the second film guide has a guide groove for guiding a small-size negative film, and the second film guide is positioned in front of the second film guide.
Film guide comprising a rotating support part of the order is displaced from the serial first position to the second position. 2. A switching arm, wherein the rotation support portion rotates about a fulcrum pin attached to a reference film guide, a switching link having a fulcrum pin supported at the tip thereof, and a fulcrum pin inserted at an end of the switching link. A switching link pivotally supported on a second film guide, attached to an end of the fulcrum pin, and rotated about another fulcrum pivoted on the reference film guide side, and a fulcrum pin of the switching arm base and the second film 2. The film guide according to claim 1, comprising a spring stretched between fulcrum pins pivotally supported by the guide.