JPH0355956Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a paper jam prevention mechanism in a photographic processing apparatus.

PRIOR TECHNOLOGY A so-called mini-lab device, in which these processing sections are integrally constructed within a photographic processing apparatus that consistently processes processes from exposure to development, fixing, and drying, can be roughly divided into an exposure/printing section, a developing, fixing, and drying section. It consists of a development processing section that performs drying, etc. In the exposure/printing section, the movement of the paper to be printed must be temporarily stopped for exposure, so the movement of the paper is done intermittently, but in the development section, the movement of the paper is stopped. It is done continuously without any interruptions.
Therefore, it is necessary to provide a buffer section between the exposure/printing section and the developing section to compensate for the difference in feeding methods, and to form and store a loop of changing paper. When the changing amount of paper loops in the buffer section decreases to a predetermined amount or less, it is detected by a loop remaining amount detection sensor that works with a flap that contacts the loops and swings, and the remaining loop amount is detected in the exposure and printing section. A hole punch detection sensor drives a first roller device disposed on the rear side and detects hole punches punched in the paper every predetermined length, for example, the length of one photo, while the paper is being fed. Thus, the paper is fed to the buffer section by a specified length, and of course is repeated as necessary. The intermittent feeding speed of the first roller device is set higher than the continuous feeding speed of the second roller device arranged in front of the development processing section for feeding the paper into the development processing section, The amount of paper that is continuously sent to the development processing section is designed to ensure that there is no shortage.

However, the first roller device may operate intermittently due to the length of one sheet of paper becoming too long to meet market demands, or a hole punch detection sensor failing to detect a hole punch in the paper. If the continuous fixed length feeding mode ends without performing this, the feeding speed of the first roller device is higher than that of the second roller device, so that the paper stored in the buffer section is The amount of loops becomes too large, which causes the loops to become stiff and the paper to get stuck between the second roller devices, resulting in a paper jam.

Purpose of the invention The present invention eliminates the drawbacks of the prior art as described above, and even when the loop in the buffer section becomes too large, resulting in only stiffness of the loop, the paper is To provide a paper jam prevention mechanism in a photographic processing apparatus which can positively prevent paper jams from getting into the paper and reliably prevent paper jams.

SUMMARY OF THE INVENTION The above-mentioned object is achieved by the features of the present invention, which include a cam which is swung together with a flap that is swung according to changes in the loop of paper, and one end of which is pivoted to a fixed part of the main body of a photographic processing apparatus. a cam actuated link assembly comprising a first link having one end pivoted to the other end of the first link, and a second link having one end pivoted to the other end of the first link; At the other end of the connecting link of an oscillating roller assembly, the oscillating roller assembly consists of a connecting link that is integrally connected to each other and pivotally supported on a fixed part of the main body of the photoprocessing apparatus, and an oscillating roller lever that has a paper pressing roller at its outer end. and a cam actuating roller cooperating with the cam on the pivot portions of the first and second links, the cam being activated with the flap when the loop size of the paper increases to a predetermined amount. The cam actuating roller is pushed by the swinging of the
This causes the oscillating roller assembly to oscillate so that the paper pressing roller enters the travel path of the paper fed by the first roller device and positively biases the path of the paper.
Accordingly, there is provided a photographic processing apparatus configured to reliably prevent the paper fed by the second roller device from being bitten by the second roller device and causing a paper jam.

With this structure, the paper jam prevention mechanism in the photo processing device according to the present invention can be used as a hole punch detection sensor to feed only one sheet of paper, even if the length of one photo is large. Even if a malfunction occurs and the paper sent out from the exposure and printing section goes into continuous fixed-length feeding mode, resulting in an excessive paper loop in the buffer section, the paper will oscillate in response to the oscillation of the flap that comes into contact with it. The moved cam pushes the cam actuating roller of the cam actuating link assembly, causing the oscillating roller assembly to oscillate, thereby causing the paper pressing roller to push the paper being delivered from the exposure and printing section out of its travel path. Positive biasing ensures that the paper is deflected from its path and is prevented from becoming jammed by the second roller system, even if the paper only becomes lodged in a loop in the buffer section. It is possible to do so.

Embodiment of the invention FIG. 3 is an explanatory diagram showing the schematic structure of a conventional photo processing apparatus of this type, in which the paper 2 sent out from the exposure and printing section 1 after printing is guided by a guide 3. The paper 2 is fed into the buffer section 4 at a predetermined feeding speed intermittently by the first roller 5 and the pinch roller 6 cooperating with the first roller 5 which feeds the paper 2 into the buffer section 4 to form a loop 7 . The paper 2 forming the loop 7 is pressed against the second roller 9 by a second roller 9 and a spring 10 for feeding the paper from the buffer section 4 to the development processing section 8 so as to cooperate with the second roller 9. A pinch roller 11 biased by a spring causes the film to be continuously fed into the development processing section 8 at a predetermined speed that is lower than the feed speed of the first roller 5. As mentioned above, since the feed speed of the second roller 9 that is continuously operated is set lower than the feed speed of the first roller 5 that is intermittently operated, the paper 2 in the buffer section 4 is The amount of the loop 7 is changed periodically so that the feeding of the paper 2 can be continued in just the right amount until the end of the operation of the photographic processing apparatus.

In order to prevent the loop 7 of the paper 2 from becoming too small and being unable to send the paper 2 to the development processing section 8, a flap 13 is provided on the main body of the apparatus and is pivoted by a shaft 12. A detection plate 14 is fixed integrally with this flap 13 so that the flap 13 swings in response to the decrease of the loop 7. When the detection plate 14 comes off the loop remaining amount detection sensor 15, it issues a detection signal to drive the first roller 5, and the hole punch detection sensor 16 arranged in front of this roller 5 detects the amount of paper equivalent to one paper. Based on the hole punches of the paper 2 formed for each length, the paper 2 is sent to the buffer section 4 only one sheet or repeatedly as necessary.

However, as mentioned above, if the length of one sheet of paper is too long or the hole punch detection sensor fails to detect a hole punch, the first roller 5 does not operate intermittently and is continuously fed a fixed length. If you find yourself in a mode,
Since the feed speed of the second roller 5 is faster than the feed speed of the second roller 9, the amount of paper loops 7 stored in the buffer section 4 becomes excessive.
The problem is that the loop 7 becomes stiff and the paper gets wedged between the second roller 9 and the pinch roller 11, resulting in a paper jam.

In order to eliminate such drawbacks, the present invention provides a second roller 11 as shown in FIGS. 1 and 2.
A first link 18 whose one end is pivoted to a fixed part of the main body of the device by a shaft 17 in proximity to the link 18, and a second link 1 whose one end is pivoted to the other end of this link 18.
9 and these first and second links 18, 19
a cam actuating roller 20 provided at the pivot portion of the
The one end of the first link 18 and the second link 1
A cam actuating link assembly consisting of a tension spring 21 stretched between the other end of the cam actuating link assembly and the other end of the cam actuating link assembly is integrally fixed to each other, each having one end pivoted to a fixed part of the device body by a shaft 22. an oscillating roller assembly consisting of a connecting link 23 and an oscillating roller lever 25, and a paper pressing roller 24 is provided at the outer end of the oscillating roller lever 25;
The outer end of the connecting link 23 is connected to the second link 1
It is pivotally connected to the other end of 9. The cam actuating roller 20 is a flap 1 attached to the aforementioned shaft 12.
The spring 21 is elastically biased into sliding contact with a cam 26 which is mounted to pivot with the spring 21. In the normal state, the cam actuating roller 20 is engaged with the recess of the cam 26 and the first link 18 is in a position where it has swung to the left as shown in FIG. In the position moved to the left, the connecting link 23 is swung counterclockwise about the shaft 22, and the paper pressing roller 24 is in a position out of the running path of the paper 2.

Because of this structure, when the loop 7 of the paper 2 in the buffer section 4 becomes too small, the detection plate 14, which swings together with the flap 13 as in the conventional device, activates the remaining loop amount detection sensor 15.
The hole punch detection sensor 16 which detects the hole punch in the paper 2 by driving the first roller 5 sends a signal to the hole punch detection sensor 16 to feed the paper by one sheet. Due to an accident, the operation of the roller 5 becomes continuous fixed length feeding mode, and the loop 7 of the paper 2 in the buffer section 4 is
If the amount becomes too large, the flap 13 will be pushed by the loop 7 and swing upwards, as shown in FIG. Cam actuating roller 2
0 is adapted to connect from the recess to the protuberance of the cam 26, which causes the first link 18 to swing counterclockwise and move the second link 19 to the right, thus causing the connecting link 23 The swinging roller lever 25 integrated therewith is swung clockwise so that the paper pressing roller 24 enters the paper 2 travel path and actively pushes the paper 2 fed by the first roller 5. The loop 7 is pushed laterally by being deflected from its running path to ensure that the paper 2 is not wedged between the second roller 9 and the pinch roller 11.

In this way, according to the present invention, even if the loop 7 of the paper 2 becomes too large due to an accident, it is possible to prevent the paper 2 from getting wedged between the second roller 9 and the pinch roller 11. be.

Effects of the invention Since the invention is constructed as described in the claims for utility model registration, as mentioned above, if the loop 7 of the paper 2 temporarily enters the continuous fixed length feeding mode due to an accident or the like, the loop Even in the event of an excessive amount, the cam 26 will swing together with the flap 13 pressed by the loop 7, so that the cam actuating roller 20 will come into contact with the raised part of the cam 26, thereby causing the first The link 18 swings counterclockwise to move the second link 19 left and right, and the connecting link 23 and the swinging roller lever 25 integrated therewith
is swung clockwise and the paper pressing roller 2
4 into the running path of the paper 2 and actively deflecting the paper 2 fed by the first roller 5 from the running path in the lateral direction between the second roller 9 and the pinch roller 11. This provides an excellent effect of reliably preventing the paper 2 from digging in.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing the state of the paper jam prevention mechanism according to the present invention during normal operation of a photographic processing apparatus. FIG. 2 is a schematic explanatory diagram showing the operation of the paper jam prevention mechanism shown in FIG. 1 when the paper loop becomes too large due to an accident. FIG. 3 is a schematic explanatory diagram similar to FIG. 1 showing the operation of a conventional photographic processing apparatus. DESCRIPTION OF SYMBOLS 1... Exposure printing section, 2... Paper, 4... Buffer section, 5... First roller, 6, 11...
...Pinch roller, 7...Paper loop, 8
...Development processing section, 9...Second roller, 13...
...Flap, 15...Loop remaining amount sensor, 16
... Hole punch detection sensor, 18 ... First link, 19 ... Second link, 20 ... Cam operation roller, 23 ... Connection link, 24 ... Paper pressing roller, 25 ... Swinging roller lever , 26...cam.

Claims (1)

[Claims for Utility Model Registration] (1) An exposure and printing section, a development processing section, and a device which is arranged behind the exposure and printing section and is driven to intermittently feed out a predetermined length of printed paper. a first roller device; a second roller device that is disposed in front of the development processing section and is operated to continuously feed the paper sent out by the first roller device to the development processing section at a predetermined speed; , a buffer section disposed between the first and second roller devices to store a loop of paper of varying size that occurs while the paper is fed; and a buffer section swinging in front of the second roller device. a flap that is arranged so as to be able to contact said loop and swing in response to a change in the size of the loop, and a detection plate that swings together with said flap to adjust the size of the paper loop in the buffer section; a drive device that drives the first roller device to feed the paper by a predetermined feed amount based on a detection signal generated by a loop remaining amount detection sensor that detects when the amount of paper has decreased to a predetermined amount. The apparatus includes a cam driven together with the flap, a first link having one end pivoted to a fixed part of the main body of the photographic processing apparatus, and a second link having one end pivoted to the other end of the first link. a cam actuated link assembly comprising a link, the other end of the second link comprising:
The other connecting links of the rocking roller assembly consist of a connecting link whose one ends are integrally connected to each other and pivoted to a fixed part of the main body of the photoprocessing apparatus, and a rocking roller lever having a paper pressing roller at its outer end. a cam-actuated roller pivotally mounted at the end and cooperating with the cam on the pivot portions of the first and second links; The oscillation of the cam pushes the cam actuating roller, which causes the oscillating roller assembly to oscillate and cause the paper pressing roller to move the paper forwarded by the first roller device. the path of the paper to positively bias the path of the paper to ensure that the paper fed by the first roller device is not bitten by the second roller device and cause a paper jam. A paper jam prevention mechanism in a photographic processing device, characterized in that the mechanism is configured as follows. (2) A utility model registration claim comprising a tension spring stretched between the one end of the first link and the other end of the second link to positively press the cam actuating roller against the cam. A paper jam prevention mechanism in a photographic processing apparatus according to scope 1.