JPH10319511A - Film carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use one printer for plural kind of film different in width, to easily carry and guide the plural kind of film in a short time and to reduce a manufacturing cost by enabling either of two kinds of film to be switched to a position where three sides thereof are guided by mutually moving them in opposite directions. SOLUTION: A lever 115 is turned clockwise or counterclockwise by a cam. When it is turned counterclockwise, the width guiding and interposing part of a carrying path is formed and positioned by the guide surfaces 112E, 112F and 112B of a first guide member 112 independently guiding the edge, the front surface and the back surface of the side edge part of the wide-width film, for example, the 135-type film. When it is turned clockwise, the first guide member 112 is slid so as to be separated from the carrying surface of the film and the first and a second guide members 112 and 113 are brought into contact with each other and combined. Thus, the width guiding and interposing part of the carrying path of the narrow-width film, for example, the APS film is formed and positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film transport device provided in an image printing apparatus for printing an image of a negative film, for example, a long sheet material, on photographic paper. More specifically, the present invention relates to a film transport device capable of switching to a transport path capable of appropriately guiding a plurality of films having different widths.

[0002]

2. Description of the Related Art When processing such films having different widths with a single printer or scanner, it is necessary that the film of each width be conveyed to the correct exposure printing position or density measurement position. In this system, a dedicated transport device suitable for the film was prepared, and the transport device was changed according to the width of the film to be used.

[0003]

Providing a corresponding number of film-conveying devices dedicated to films having different widths requires a complicated, heavy-weight and expensive device in which each conveying device carries a driving system and a sensor system. As a result, the replacement operation is not easy and takes time.

If each part of the transporting device is not accurately processed, processing errors are accumulated and the predetermined position on the optical axis of the negative film is changed, the focus of the printing screen is out of focus, and a satisfactory printing print is obtained. There were also adverse effects such as disappearance.

The present invention eliminates such disadvantages of the prior art, and the film transport path can be accurately converted by moving a small number of members in accordance with the width of the film, so that high-quality printed prints are always stable. It is an object of the present invention to provide a film transport device that can be obtained by the above method.

[0006]

This object is achieved by any one of the following technical procedures (1) to (4).

(1) In correspondence with two types of films having different widths, the position is switched by adjusting to any one of the film widths, and keeping the center line in the transport direction of the film screen and the transport plane of the film the same. A film conveyance guide is provided on both sides of the center line in the conveyance direction, and the conveyance guide corresponds to a first film width, and has a guide surface and a third surface for guiding the front side, the back side, and the edge of the film side edge. A first guide member corresponding to the film width of 2 and having a guide surface for guiding an edge together with only the back surface of the film side edge or the back surface; and a surface and edge of the film side edge corresponding to the second film width. Or a second guide member having a guide surface that guides only the surface,
The first guide member and the second guide member are slidably accommodated in a guide frame provided on a base of the film transport device, and, via moving means, at right angles to the film transport plane, and A film transport device characterized in that the film transport device is moved in opposite directions so as to be switched to a position for guiding one of two types of films in three directions.

(2) In correspondence with a plurality of films having different widths, the position is switched by adjusting to the width of any one of the films and keeping the center line in the transport direction of the film screen and the transport plane of the film the same. Provided on both sides of the center line in the transport direction, the transport guide of the film is corresponding to each film width, the surface of the film side edge, having a guide surface to guide the three sides of the back and edge, It is constituted by a guide member which is slidable on a reference plate of a base of the film transport device in parallel with the film transport surface, and the guide member slides to a position where it guides in three directions corresponding to each predetermined film and is placed on the reference plate. A film transport device characterized in that it is positioned and set.

(3) The film transport apparatus according to the above mode (1) or (2), wherein the switching of the transport guide is performed based on a detection signal of a film width detector.

(4) The film transport apparatus according to any one of (1) to (3), wherein an alarm is issued when the width of the film does not match the width of the transport guide.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to the description of the first embodiment of the film transport apparatus of the present invention, a schematic configuration diagram of the photographic printing apparatus of FIG. 1 equipped with the film transport apparatus will be described.

In FIG. 1, a photographic printing apparatus 1 includes a film illumination system, a film transport device, an exposure unit, a photographic paper holding unit, and the like. The illumination system for the film is an optical system for illuminating the film, and the light flux of the light source 15 illuminates the film F through the illumination lens 16 and the correction color filter 18. Further, the film transport device winds the film and discharges the film by the motor 21 of one driving source. The exposure section prints the image of the film on the photographic paper P which is exposed to the shutter 19 and conveyed to the printing position through the lens 17.

[0013] Here, the film transport device 10 is claimed.
The embodiment will be described in more detail.
A is a substrate of the transport device, which is constituted by walls 10A2 on both sides and a reference plate 10A1 connecting the walls, and a film mask 111 of a film screen mask is provided on a part of the transport path for the exposure unit. In the film transporting means, the motor 21 as a drive source attached to the wall 10A2 transports the film to the take-up reel side with a forward rotation, and further transports the film in the discharge direction from the take-up reel side with a reverse rotation.
A pulley 22 is attached to a shaft of the motor 21, and a timing belt 25 is hung on the pulley 22. When the timing belt 25 is driven, the other pulleys 23, 28, and 24 rotatably supported by the wall surface 10A2 simultaneously rotate. Roller 27 having shaft 27A by rotation of pulley 23, and shaft 26 pressed against it
The roller 26 having A rotates to convey the film. Further, the take-up shaft 31 is rotated by the rotation of the pulley 24. The pulley 28 serves to prevent the timing belt from sagging. The take-up reel 31 is provided on the take-up shaft 31.

The substrate 10A of the film transport device 10
The guide frames 11 fixedly attached to the reference plate 10A1 are provided on both sides in the film transport direction. As shown in the perspective view of FIG. 3 or FIG.
The guide member 112 and the second guide member 113 are housed,
The first guide member 112 is an inner surface 11 of the guide frame 11.
The second guide member 113 is slidable in the film transport plane direction along A and 11B.
C and 11D, the first and second guide members are slidable in the direction of the film transport plane, and the first and second guide members are both ends of a lever 115 pivotally supported around a support shaft 116 fixed to the guide frame 11. Connecting holes 115A,
Pins 112A and 113A provided respectively on the first and second guide members 112 and 113 are fitted to and connected to the 115B, and the lever 115 is rotated clockwise or counterclockwise by a cam (not shown). When rotated counterclockwise, as shown in the perspective view of FIG. 3, the first guide member 112 slides on the inner surface of the guide frame 11 in the direction of the transfer surface, and the second guide member 113 slides in the opposite direction. Then, the first guide member alone is used to make a wide film such as 135
The guide film 112E, 112F, 112B which guides the edge of the type film side edge, the front surface and the back surface forms a width guide holding portion of the conveyance path and is positioned. As shown in the perspective view, the first guide member 112 is slid by a moving means described later so as to be separated from the film transport surface, and the guide surface 1 on the back surface of the side edge of the narrow film, for example, the APS film.
13B and the second guide member slides toward the film transport plane to form two guide surfaces 113F and 113E of a side edge surface and an edge of the narrow film. The guide members 112 and 113 are brought into contact with each other and combined so as to form and position the width guide holding portion of the conveying path of a narrow film such as an APS film. At this time, each guide surface is formed such that the center line in the transport direction of the two types of film screens and the transport plane of the film are kept the same.

Next, the moving means will be described.

The lever 115 has a support shaft 116 fixed at symmetric positions at both ends of the guide frame 11 in the film transport direction.
It is rotatably pivoted. The rotation is performed by a cam (not shown) having the same shape, so that the first and second guide members 112 and 113 can smoothly slide on the inner surface of the guide frame 11.

Exposure light passing windows 111B are provided at both film positions in the middle of the guide frame 11, two on each side.

The operation of the moving means can be performed by a solenoid instead of a cam. However, operation by the cam is performed more smoothly.

Further, the switching operation can be performed in response to a signal from a film width detector W provided in the photographic printing apparatus.

If the width of the film and the width of the set film transport guide are different, the signal value of the width detector G of the transport guide is compared with the signal value of the detector W. An alarm such as a buzzer can be activated.

The above is an example of the first embodiment. However, the first and second guide members 112 and 113 have different first and second guide members.
The second guide member will be described.

As shown in the sectional view of FIG.
The guide member 112 has a back guide surface 113 of a narrow film.
B, the edge guide surface 113E is provided, and the second guide member 113 is provided with only the surface guide surface 113F. When guiding a narrow film, the first and second guide members are provided similarly to the above-described embodiment. The guide members 113A, 113B, and 113F form a width guide sandwiching portion, and substantially the same effect can be obtained.

The above is an embodiment of the film transport apparatus in which the transport path of the film having two different widths can be switched. However, the transport path of the film having three or more different widths can be switched. Must use another mechanism. This embodiment is claim 2 and an embodiment thereof will be described with reference to FIG. 6 which is a schematic configuration diagram of the photographic printing apparatus of FIG.

In FIG. 2, description of common parts such as an optical system part common to FIG. 1 is omitted. That is, unlike the case of FIG. 1, the transport guide is set in the film transport device 10 by sliding the transport guide in the width direction within the base body 10B without using the guide frame 11. The base 10B forms a frame in which the back and front walls 10B2 and 10B3 are connected by a reference plate 10B1, and a film guide member 114 is provided on the reference plate 10B1 as a film transport guide at a symmetrical position of the center line of the film transport path. Are guide surfaces 114E, which guide the edge, front surface, and back surface of the film side portion.
114F and 114B are integrally formed and provided as width guide holding portions, and the film guide member 114 is provided with a reference plate 10B in the width direction according to the width of the film to be used.
The reference plate 1 is moved, for example, by a thumbscrew 130 to a position where the conveyance of the film is correctly regulated and guided.
0B1 is fixedly set. At this time, the center line in the transport direction of each film screen and the film transport plane are set to be kept the same.

The roller 27 for driving the film transport is formed by a concentric and integral shaft 27A formed on both walls 10B of the base 10B.
2 and 10B3, are rotatably supported by bearings, and a driving wheel 23 is attached to one end. The driving wheel 23 is accurately rotated by a timing belt 25 using the same power transmission mechanism as the configuration described in FIG. Drive transmission is performed.

The driven roller 26 is rotatably supported by a bearing 106 provided on the swing frame 101 with respect to the roller 27 for driving the film transport.
1, a shaft 102 parallel to the roller 26 is rotatably supported by bearings 105 on both walls 10B2 and 10B3 of the base 10B, and a lever 103 is provided at one end of the shaft 102 with, for example, a pin 104. Spring pin 109B fixed to the lever and provided on the lever and wall 10B3
The spring 109 is applied between the spring-applying pins 109A provided in the first and second rollers, and the two rollers are pressed to generate a film conveying force.

Mechanism 1 for pressing roller 26 against roller 27
Examples are as described above, which are applicable to FIGS. 1 and 2 in common.

The set position of the conveyance guide with respect to the film width can be dealt with by comparing the detection signals of the detectors W and G, as in the case of FIG. Operation is performed.

[0029]

According to the film transport apparatus of the present invention, the transport guide for two or more films having different widths can be converted easily and reliably in a short time. The device manufacturing cost was also significantly reduced as compared with a system in which most of the mechanisms were converted into a unit.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a photographic printing apparatus on which an embodiment of a film transport apparatus of the present invention is mounted.

FIG. 2 is a schematic configuration diagram of a photographic printing apparatus equipped with another embodiment of the film transport apparatus of the present invention.

FIG. 3 is a partial perspective view when a conveyance guide of the film conveyance device mounted in FIG. 1 is set for a large size.

FIG. 4 is a partial perspective view when a conveyance guide of the film conveyance device mounted in FIG. 1 is set for a small size.

FIG. 5 is a sectional view showing another embodiment of the first and second guide members.

FIG. 6 is a sectional view taken along line AA of the film transport device mounted in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Photo printing device 10 Film transport device 10A, 10B Base 10A1, 10B1 Reference plate 10A2, 10B2, 10B3 Wall 11 Guide frame 11A, 11B, 11C, 11D Inner surface 15 Light source 17 Projection lens 19 Shutter 21 Motor 22, 22, 23, 24, 28 Pulley 25 Timing belt 26, 27 Roller 101 Swing frame 103 Lever 109 Spring 110 Transport guide 111 Mask 111B Exposure light passage window 112 First guide member 112A Pin 112E, 112F, 112B Guide surface 113 Second guide member 113A Pin 113E, 113F , 113B Guide surface 114 Film guide member 114E, 114F, 114B Guide surface 115 Lever 115A, 115B Connection long hole 116 Support shaft 130 Thumb screw F Film P Photographic paper G, W detector

Claims (4)

[Claims] 1. According to two types of films having different widths, the position is switched by adjusting to the width of any one of the films and maintaining the center line in the transport direction of the film screen and the transport plane of the film the same. A film conveyance guide is provided on both sides of the center line in the conveyance direction, and the conveyance guide corresponds to a first film width, and has a guide surface and a third surface for guiding the front side, the back side, and the edge of the film side edge. A first guide member corresponding to the film width of 2 and having a guide surface for guiding an edge together with only the back surface of the film side edge or the back surface; and a surface and edge of the film side edge corresponding to the second film width. Or a second guide member having a guide surface that guides only the surface,
The first guide member and the second guide member are slidably accommodated in a guide frame provided on a base of the film transport device, and, via moving means, at right angles to the film transport plane, and A film transport device characterized in that the film transport device is moved in opposite directions so as to be switched to a position for guiding one of two types of films in three directions. 2. In response to a plurality of films having different widths,
In accordance with the width of any one of the films, a film conveyance guide is provided on both sides of the conveyance direction center line, the position of which is switched while the conveyance plane center line of the film screen and the film conveyance plane are kept the same and provided. The transport guide has a guide surface that guides three sides of the front side, the back side, and the edge of the film side edge corresponding to each film width, and slides in parallel with the film transport surface on a reference plate of a substrate of the film transport device. A film transport device, comprising a guide member which is enabled, and the guide member is slid to a position to guide in three directions corresponding to each predetermined film, and is positioned and set on the reference plate. 3. The film transport device according to claim 1, wherein the switching of the transport guide is performed based on a detection signal of a film width detector. 4. The film transport apparatus according to claim 1, wherein an alarm is issued when the width of the film does not match the width of the transport guide.