JPH11194430A - Guide device for photographic sensitive material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently take out the short-length part of a photosensitive material by constituting the guide device thereof leading to a developing processing part from a paper magazine through a printing and exposure part in a photograph printing device so that the photosensitive material can be rewound to the original paper magazine by reversely carrying it without jamming it at the gap of a paper guide even when the trailing edge thereof separated from the paper magazine is carried to an optional position. SOLUTION: The guide device 10 is constituted of the paper guide 11 carrying the photosensitive material to the developing processing part from the paper magazine 1 attached to the case 5 of the photograph printing device through the printing and exposure part 30. Then, one side 15b of a guide plate at the receiving side end 15 of the guide 11 is formed as the member whose cross section is L-shaped and rotated by a rotating driving mechanism constituted of a rotating driving part obtained by providing a link mechanism 16, a driving gear 19 and a driven gear 20 with a friction member by interlocking with the carrying action of the photosensitive material. Thus, since the photosensitive material is guided in both of normal and reverse directions so that it can be smoothly passed through the gap between the paper guide, it can be rewound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide device for a photosensitive material in a photographic printing apparatus for printing a film image on a photographic photosensitive material.

[0002]

2. Description of the Related Art In general, a photographic printing apparatus mounts a paper magazine containing a long photosensitive material in a roll shape on an outer case of the apparatus, guides the photosensitive material by a paper guide, and sends the photosensitive material to a printing exposure unit. After the negative image from the film is printed and exposed, the film is further guided to an automatic developing machine by a paper guide for development processing.

As a sheet feeding system for such a photographic printing process, a long photosensitive material is sent to a printing exposure unit as it is, and after being exposed to printing, developed and dried by an automatic developing machine. Roll processing to cut the photosensitive material to the printing exposure unit, and also cut to each frame length with a cutter, print the photosensitive material cut to a predetermined length, and send it to an automatic developing machine. There is.

In a photographic printing apparatus on the premise of the above-mentioned roll processing feed system, when a photosensitive material is sent from a paper magazine to a printing exposure unit, when the print size is changed, the paper magazine is replaced with another one of a different size. Will be replaced. At the end of the day's work, the photosensitive material is pulled back into the paper magazine so that pressure-sensitive fogging by the transfer roller does not occur on the photosensitive material supplied to the transport path. In such a case, if the end of the photosensitive material is separated from the paper magazine and the length of the photosensitive material fed from the paper magazine into the exterior case of the apparatus is shorter than the length from the entrance of the exterior case to the printing exposure unit, the photosensitive material is transferred into the paper magazine. I can't pull back.

As a method for coping with such a case, sensors are provided before and after a feed roller provided along a paper guide from a paper magazine to a printing exposure unit to detect the presence or absence of a photosensitive material, and to control the feed roller. Japanese Patent Application Laid-Open No. 8-82870 proposes a method in which the end of the photosensitive material is manually pulled out from the entrance of the outer case of the apparatus by hand, or the feed roller is reversed and pulled back to the paper magazine side.

[0006]

When the photosensitive material runs out or the print size is changed, it is necessary to attach and detach a paper magazine in order to replace the photosensitive material. If the paper is fed backward by reversing the rollers, there is a problem that there is a gap between the photosensitive material supply port of the paper magazine and the beginning of the paper magazine.

Since the photosensitive material curls in the winding direction, the leading end of the photosensitive material may be clogged or damaged by being caught in the gap when the photosensitive material is fed out of the paper magazine.
In order to prevent such a situation, the leading end of the paper guide is expanded from the photosensitive material supply port of the paper magazine so that the leading end of the photosensitive material can be reliably transferred to the paper guide when feeding the photosensitive material in the forward direction. I have.

However, since the starting end of the paper guide is in an expanded state, when the photosensitive material is returned to the paper magazine, the end of the photosensitive material is guided to the gap, which is opposite to the time when the photosensitive material is supplied. The photosensitive material cannot be pulled back into the paper magazine. The proposal by the above-mentioned patent publication assumes that there is no gap at the beginning portion of the paper guide in the expanding state, and if there is a gap, it is necessary to take some measure so that the photosensitive material does not clog the gap. No.

Further, in a conventional general photographic printing apparatus which does not adopt the proposal of the above-mentioned patent publication, when the photosensitive material is fed by a roll processing method, the end of the photosensitive material becomes shorter as it goes away from the paper magazine. Then, when the printing operation is completed, there is no other choice but to send the unexposed light from the printing exposure unit to the outside. The same applies when the paper size needs to be changed after the end of the photosensitive material is separated from the paper magazine.

On the other hand, in the case of the sheet processing system, when the end of the photosensitive material is separated from the paper magazine, it is exposed without being cut for each frame before and after the printing exposure unit. Processing of cutting into a predetermined size is required. This is because if cutting is continued even after the end of the photosensitive material has been separated, the length of the cut will be less than the pitch between the feed rollers in the transport path, and the end cut must be removed by opening the cover.

The present invention has been made in consideration of the above-mentioned problems,
In the photosensitive material guiding device of the photographic printing apparatus, when the photosensitive material end is separated from the paper magazine and the photosensitive material is conveyed backward for replacement of the paper magazine or the like, the gap of the expanded connection end of the paper guide is not clogged with the photosensitive material. It is an object of the present invention to provide a guide device having the above configuration.

[0012]

According to the present invention, as a means for solving the above problems, a photosensitive material is transferred from a paper magazine containing the photosensitive material to a conveying path of the photosensitive material through a printing exposure unit to an automatic developing machine. And a photosensitive material guiding device that guides the photosensitive material by connecting a plurality of paper guides of various lengths to the photographic printing apparatus, and a photosensitive material supply direction of at least one of the paper guides. The connection end on the rear end side is expanded, and at least one side of the connection end is formed of a U-shaped cross-section member, and the U-shaped cross-section member is rotatable in a direction orthogonal to the photosensitive material conveying direction. And a rotation drive mechanism for rotating the U-shaped cross-section member in the conveying direction of the photosensitive material.

According to the photosensitive material guiding device having the above-described structure,
The photosensitive material after the end of the photosensitive material is separated from the paper magazine is handled as follows. The end of the photosensitive material leaves the paper magazine and is still fed by the feed roller, and the end reaches an arbitrary position up to the printing exposure unit, at which time the photosensitive material is exhausted or a request to change the size of the photosensitive material is issued Is stopped.

Thereafter, when the feed roller is rotated in the reverse direction to feed the photosensitive material in the reverse direction, the end of the photosensitive material reaches the expanded connection end on the rear end side of the paper guide in the photosensitive material supply direction. Since the cross-section member and the rotation drive mechanism are provided at the connection end, the end of the photosensitive material is reversely fed, and when approaching the connection end, the cross-section member is interlocked with the reverse feed of the photosensitive material by the rotation drive mechanism. To rotate the photosensitive material in the opposite direction to guide the photosensitive material in the opposite direction. As a result, the photosensitive material in the paper guide up to the printing exposure unit is smoothly reversely fed back to the paper magazine.

In order to reversely feed the photosensitive material after stopping at the above-mentioned arbitrary position, it is necessary to provide a plurality of feed rollers at a pitch equal to or less than the minimum length along the paper guide to the printing exposure section. . Further, it is preferable to provide a cutter at a position before and after the printing exposure unit to cut a short portion to be fed back.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic diagram of a guide device for a photographic photosensitive material. (A) The figure shows one paper magazine 1
(B) shows an example in which two sets of paper magazines 1 are provided to facilitate the exchange of paper sizes with each other. The paper magazine 1 is detachably mounted on a magazine mounting base 2 provided on an outer case 5 of a photo printing apparatus.

A roll R of the photosensitive material P is exchangeably accommodated in the paper magazine 1, and a feed roller 4 for feeding out the photosensitive material P from a magazine lip 3 provided at one end is provided. The magazine lip 3 is inserted into the opening 6 of the outer case 5, and the photosensitive material P is fed into a photosensitive material P guide device 10 described later.

The guide device 10 is adapted to move the photosensitive material P
A paper guide 11 that feeds the sheet to a position just before the exposure table 31 of the printing exposure unit 30, and feed rollers 12, 13 provided in the middle thereof.
And a guide roller 14. Paper Guide 1
Reference numeral 1 denotes a pair of upper and lower guide plates 11a and 11b opposed to each other with an interval allowing passage of the photosensitive material P (see FIG. 6). The receiving side end 15 of the photosensitive material from the paper magazine 1 has a magazine lip. 3 is formed so as to expand like a trumpet (see also FIG. 3).

Further, the receiving end 1 expanded in a trumpet shape.
One (upper in the illustrated example) 15a of a pair of upper and lower guide plates 15a and 15b is formed integrally and continuously with the paper guide 11, and the other 15b is formed as the paper guide 11
Is formed as a short V-shape member and is rotatably provided.

The rotatable guide member 15b is connected to a link mechanism 16 interlocking with a gear group of a rotary drive unit for driving the feed roller 12 to rotate. As shown in FIG. 2, the three links 16a, 16b, 16c form a parallel link mechanism. Link 1 of parallel link mechanism 16
Before and after 6a, stoppers 17a and 17b for limiting the rotation angle within a range of a fixed angle θ are provided. The receiving side 15b is integrally connected to the link 16a,
8 can rotate freely.

The above-described rotary drive section is constituted by a driven gear 19 in which driven gears 20 and 20 'are engaged. The link 16c is integrally fixed to a shaft 20x of the driven gear 20, and the link mechanism 16 is driven to rotate. It is linked to the department. In addition,
Although not shown, a drive motor is connected to the shaft of the drive gear 19. The driven gear 20 has a gear group G ₁ .
To ... G _n-1, G _n engages to transmit the rotation force of the drive gear 19 by the gear G ₀ for rotating the feed roll 4 in the paper magazine 1 is meshed with the gear G _n of the last stage I have to.

As shown in FIG. 5, on the shaft 20x of the driven gear 20, there is provided a friction member 25 for elastically connecting the driven gear 20 to the shaft 20x elastically with a constant frictional force. The friction member 25 sandwiches a friction plate 22 between an attachment plate 21a attached to the driven gear 20 and a holding plate 21b (both are made of SUS), and attaches a spring 23 provided outside thereof to a nut 2
4, the pressing force can be adjusted freely (see also FIG. 4). Note that a bidirectional torque limiter may be used instead of the friction member 25.

After passing through the feed roller 13 at the end of the paper guide 11 described above, the transfer path for feeding the photosensitive material P passes through the exposure table 31 of the printing exposure unit 30 and then to the developing unit of the photographic printing apparatus. After passing through the printing exposure unit 30, a cutter 33 is provided. This is to separate the photosensitive material P from the exposed portion when rewinding the photosensitive material P, which will be described later.

The operation of the guide device of the embodiment configured as described above is as follows. In the example having only one set of the paper magazine 1 as shown in FIG. 1A, the paper magazine 1 is mounted on a photographic printing apparatus as shown in FIG. The basic operation for performing the exposure is the same as in the related art.

When the paper material 1 is loaded and the photosensitive material P is fed out first, the photosensitive material P is fed out by the feed roller 4 in the paper magazine 1 and at the same time as the feed material is fed, the link mechanism 16 is rotated by the rotary drive unit. Fig. 2
The links 16a to 16c rotate until the state shown in FIG. When the links 16a to 16c advance to the illustrated angle, the stopper 17b prevents further rotation of the link 16a.

However, since the rotary drive unit rotates continuously, this rotation is performed by the friction plate 22 shown in FIG. 5 while the driven gear 20 rotates but the shaft 20x is frictionally slid so as not to rotate.
The rotation is interrupted between x and x. For this reason, the feed roller 4,
The driving of the photosensitive materials P is carried out without any trouble.

The frictional force of the friction plate 22 is applied to the receiving end 1 of the dogleg via the link mechanism 16 during the initial feeding.
Any size may be used as long as it gives the minimum rotational force necessary to rotate 5b so as to expand it into a normal trumpet shape, and therefore a small frictional force is sufficient. However, the photosensitive material P is continuously fed by an amount required for the printing length in the printing exposure section 30, and the feeding is stopped and intermittently performed during the exposure.

As described above, the photosensitive material P is intermittently fed out and printing exposure is performed for each frame. An advantage of this embodiment is that in this example, the end of the photosensitive material P of one set of the paper magazine 1 is used. When the paper is sent from the paper magazine to an arbitrary position up to the printing exposure unit 30, the feeding by the feed roller 12 or 13 is stopped at the end of the work or when it is necessary to replace the photosensitive material having a different size with the paper magazine. Thereafter, the feed roller 12 or 13 is rotated in the reverse direction to perform reverse feed, and the end of the photosensitive material is rewound into the paper magazine 1 without being clogged at the connection end of the paper guide.

At the time of rewinding, the exposed portion and the remaining portion are separated by the cutter 33 before the photosensitive material P described below is fed backward. Now, if the terminal is the feed roller 13
, Or between the feed roller 12 and the paper magazine 1, the rotation driving unit is first reversely rotated.

Then, since the link 16a is in a free state with respect to the rotation in the opposite direction from the state shown in FIG. 2A, the rotation by the friction plate 22 is transmitted to the shaft 20x, and the link mechanism 16 turns the photosensitive material. It rotates in the opposite direction in conjunction with the movement. However, as shown in FIG. 2B, when the link 16a rotates by a certain angle θ, the link 16a is prevented from rotating further by the stopper 17a on the opposite side, and cannot be rotated.

However, the driven gear train can continue to rotate by overcoming the small frictional force of the friction plate 22 as in the case of the normal rotation, so that the photosensitive material P is fed back to the original paper magazine 1 by the feed rollers 12, 13 and 4. And returned to
As shown in (b), the opposite side of the receiving side end 15b of the U-shaped member is expanded with respect to the end of the photosensitive material P to be fed back, and the paper magazine 1 passes through this connection end smoothly.
Rewind. At the time of rewinding, the end of the photosensitive material is fed by the feed rollers 12 and 13 of the transfer path, and when the photosensitive material is rewound to the paper magazine 1, the leading end of the photosensitive material is eventually turned to the feed roller 12.
When the paper magazine 1 has passed through, the paper magazine 1 cannot be fed any more, but then can be completely returned to the paper magazine 1 by being rewound by the feed roller 4 of the paper magazine 1.

Although only the feed rollers 12 and 13 are provided along the paper guide 11 in the above example, even if the end of the photosensitive material is stopped at an arbitrary position, it can be fed backward if necessary. Is provided with a plurality of feed rollers.

Also, in the above description, 1 is shown in FIG.
An example in which the operation is performed using a pair of paper magazines 1 has been described. However, as shown in FIG. 1B, the operation is basically the same when two sets of paper magazines 1 and 1 are used. In the case of the figure, the operation efficiency is improved by the fact that paper magazines 1 of different sizes can be set and prepared in advance.

Further, in the above embodiment, the link mechanism 16 and the drive gear 1 serve as a mechanism for rotating and driving the V-shaped member.
9, a rotary drive mechanism having a structure in which a friction member 25 is attached to a driven gear 20 has been described. In addition to such a mechanical interlocking mechanism, for example, a dogleg member is rotatable about a rotary shaft 18. Alternatively, a motor or a rotary solenoid may be connected to the rotary shaft 18 so that the rotary direction is designated by an electrical signal and driven to rotate.

In the above description, the connection end of the paper guide 11 is expanded, and the position where the U-shaped member and the link mechanism 16 are provided is between the magazine lip 3 of the paper magazine 1 and the start end of the paper guide. However, the above components may be provided at an arbitrary position in the middle of the paper guide other than the above position.

In the above example, the photosensitive material is fed by a roll processing method. However, the above-described components can be similarly applied to a sheet processing method.

[0037]

As described above in detail, the photosensitive material guiding apparatus of the present invention has a rear end in the photosensitive material supply direction of the paper guide at an arbitrary position in the photosensitive material transport path from the printing exposure section to the developing section. The connection end on the side is expanded, and one side member of this connection end is formed by a V-shaped cross-section member, and this is rotated by the rotation drive mechanism in conjunction with the feeding of the photosensitive material in the transport direction to rotate the photosensitive material. I decided to guide you,
When the end of the photosensitive material is separated from the paper magazine and reaches an arbitrary position, when the paper magazine needs to be replaced or the size needs to be changed, the feed is stopped, and the reverse feed is performed. The mechanism is rotated in conjunction with the reverse feed, so that the end of the photosensitive material that is fed back can be guided so as not to be clogged between the gaps and can smoothly pass through the connection end, so that the photosensitive material can be wound back into the original paper magazine It can be returned and the short portion of the photosensitive material can be efficiently taken out, so that there is no needless operation and the working efficiency is improved.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a photographic photosensitive material guiding device.

FIG. 2 is an enlarged view near the receiving end of the paper guide.

FIG. 3 is a perspective view of the same.

FIG. 4 is a plan view of the above.

FIG. 5 is a partial cross-sectional view of the friction member viewed from the direction of arrows VV in FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper magazine 2 Mounting stand 3 Magazine lip 4 Feed roller 5 Outer case 6 Opening 10 Guide device 11 Paper guide 12, 13 Feed roller 15 Receiving end 16 Link mechanism 17a, 17b Stopper 18 Rotary shaft 19 Drive gear 20 Follower gear 30 Burning Exposure unit 31 Exposure table 33 Cutter

Claims (3)

[Claims] 1. A feed roller for transferring a photosensitive material from a paper magazine containing the photosensitive material to a conveying path of the photosensitive material through a printing exposure unit to an automatic developing machine, and a plurality of paper guides of various lengths are connected. A photosensitive material guiding device for guiding the photosensitive material is provided in the photographic printing apparatus, and a connection end of at least one of the paper guides on the rear end side in the photosensitive material supply direction of the paper guide is expanded. At least one side member is formed of a U-shaped cross-section member, and the U-shaped cross-section member is rotatably provided in a direction orthogonal to the conveying direction of the photosensitive material, and the U-shaped cross-section member corresponds to the conveying direction of the photosensitive material. And a rotation drive mechanism for rotating the photographic material. 2. The photograph according to claim 1, wherein the paper magazine is detachably mounted on a photoprinting apparatus, and a magazine lip of the paper magazine is connected to the expanding connection end. Guide device for photosensitive material. 3. A gear mechanism in which the rotation drive mechanism applies a rotation drive force, a link mechanism connected to the gear mechanism via a rotation shaft frictionally engaged with a friction member, and a rotation angle of the link mechanism within a predetermined range. 3. An apparatus according to claim 1, further comprising an angle limiting means for limiting the photographic material.