CN1294062C - Sheet transporting mechanism and method, photograph processor therewith - Google Patents

Abstract

In the sheet conveying mechanism of the present invention, a pinching mechanism that can be changed between a state of pinching a sheet-shaped object to be processed and a state of not pinching a sheet-shaped object to be processed is arranged in the vertical direction, and the pinching mechanism pinches the object to be processed while the pinching mechanism pinches the object to be processed. The sheet conveying mechanism that drives the object to be processed to the upper downstream pinching mechanism is characterized in that the specified pinching mechanism is controlled so as not to pinch the object to be processed that is separated from the upstream pinching mechanism for a predetermined time , at this time, the clamping mechanism on the upstream side supports the lower end of the object to be processed that has been separated from clamping in a state parallel to the conveying direction. Such a sheet conveyance mechanism can appropriately correct skewing of a sheet-shaped to-be-processed object in the conveyance process which especially affects the quality of a resultant object.

Description

Sheet conveying mechanism, sheet conveying method, and photo processing apparatus using the same

technical field

The invention relates to a sheet conveying mechanism and a sheet conveying method, especially suitable for a photo processing device.

Background technique

Conventionally, in processing sheet-shaped processing objects such as photo processing apparatuses and printing apparatuses, such a structure has been adopted, that is, there are a plurality of different processing units with processing content, and the processing units are transported between each processing unit and within each processing unit. After conveying the object to be processed and carrying out the target processing in each processing part, the result object is taken out.

In this case, when a photographic processing apparatus is taken as an example to give a schematic description, the long photosensitive material (sheet-shaped object to be processed) drawn out from the film cassette and wound in a roll shape is cut into a predetermined length and transported to the The exposure part, after the exposure process is carried out here, is transported to the development process part, and after the development process is carried out here, it is discharged as a photo, and the photosensitive material is transported from the photo paper box to the discharge, and is carried out by the transport mechanism.

As the conveying mechanism, there is a method in which the photosensitive material is conveyed by the rotation of the driving roller while pinching the photosensitive material with a plurality of pairs of pinch rollers and driving rollers, and the circular operation of the driving belt while pinching the photosensitive material by a pair of driving belts. The method of conveying the photosensitive material is the method of conveying the photosensitive material by the movement and operation of the nip member while the photosensitive material is gripped by the nip member, and the conveying mechanisms of these methods are installed in the apparatus individually or in a composite form.

However, in terms of the relevant conveying mechanism, the photosensitive material is inclined to the conveying direction (moving direction) inside the conveying mechanism (the so-called "oblique" state) or deviates from the original position along the width direction (direction perpendicular to the conveying direction) (the so-called "snake" state) is conveyed. Especially for the conveying mechanism of the roller method, due to the unevenness of the roller pressing force in the width direction, the photosensitive material is prone to oblique and meandering. When this happens, for example, in the case of a photographic processing device, the photosensitive material is still transported to the exposure section in a slanted, snaking state, and the image formed in the exposure section is inclined or laterally misaligned with respect to the photosensitive material, thereby damaging the photo. commodity value.

Therefore, the photosensitive material should be prevented from slanting and snaking. Regarding the conveying mechanism, especially for the roller-type conveying mechanism, there are a pair of guide members (width restricting members) that are provided to slide and contact the two edges of the photosensitive material to limit the width direction. However, in general, since there is a certain degree of gap between the guide member and the side edge of the photosensitive material, there is a possibility that the photosensitive material may run obliquely or meandering in this range, and the oblique running must not be ignored according to the degree of the gap. the impact of the situation. In addition, even if the gap is eliminated, the corners of the square photosensitive material are warped due to the conveying force of the rollers, and there is a skewing phenomenon between the guide members. For the photosensitive material, since the pressing force such as the roller is always in an applied state, it is difficult to correct the state of the photosensitive material that has been obliquely or meandering no matter whether a guide member is provided or not.

Here, the present invention takes the above problems into consideration, and an object of the present invention is to provide a sheet conveying mechanism and a sheet conveying method capable of well correcting the oblique movement of the object to be processed during conveying which particularly affects the resultant object, and a method using these. A photo processing apparatus further provides a sheet conveying mechanism and a sheet conveying method capable of well correcting meandering of an object to be processed, and a photo processing apparatus using these.

Contents of the invention

In order to solve the above-mentioned problems, the sheet conveying mechanism of the present invention is provided with a clamping mechanism that can change the state of pinching the sheet-shaped processed object and the state of not pinching the sheet-shaped processed object along the vertical direction. While being driven by the pinching mechanism, the object to be processed is conveyed to the downstream side pinching mechanism located at the upper position, and it is characterized in that the specified pinching mechanism does not pinch the processed object detached from the upstream side pinching mechanism for a predetermined time. At this time, the clamping mechanism on the upstream side supports the lower end of the processed object in a state parallel to the conveying direction of the processed object separated from the pinch.

In addition, in the sheet conveying method of the present invention, corresponding to the above-mentioned sheet conveying mechanism, a pinch mechanism that can be changed into a state of pinching a sheet-shaped to-be-processed object and a state of not pinching a sheet-shaped to-be-processed object is arranged in the vertical direction. Pinching the object to be processed, while being driven by the pinching mechanism, the object to be processed is transported to the downstream pinching mechanism located at the upper position, and it is characterized in that: after the object to be processed is detached from the pinching mechanism on the upstream side, the processed object The downstream pinching mechanism that is in contact with the processed object is set to the non-pinched state. At this time, the processed object that has been separated from the pinched is parallel to the conveying direction, and is supported from the lower end of the processed object by the upstream pinched mechanism. Then, the pinching mechanism on the downstream side is brought into the pinching state, and the pinching mechanism on the downstream side is driven to further convey the object to be processed upward.

According to these inventions, the object to be processed is in a free state without being held by any holding mechanism within a specified time after breaking away from the specified holding mechanism, and just hangs on the holding mechanism by its own weight. At this time, if the object to be processed is still in an inclined state, it will be contacted by the clamping mechanism to correct its state, and the object to be processed will be positioned parallel to the conveying side. Consequently, the subsequent processed objects are transported to the downstream side in a state parallel to the transport direction.

In addition, the sheet conveying method in the case where the nip mechanism according to the second aspect of the present invention is a roller pair composed of a driving roller controlled by rotational driving and a pinch roller capable of pressing against/separating from the driving roller adopts In the following configuration, as described in the sixth aspect of the present invention, the clamping mechanism is a roller pair composed of a driving roller controlled by rotational drive and a pinch roller that can be pressed/separated from the driving roller. When the rotation of the driving roller in the middle and the upper end of the object to be processed enters the downstream side roller pair, the pinch roller in the downstream side roller pair is separated and the driving roller in the downstream side roller pair is rotated for a specified period, and then, in When the object to be processed is separated from the specified roller pair, the rotation of the driving roller in the specified roller pair is stopped, and after a predetermined time, the pinch roller in the downstream roller pair is pressed again, and the downstream roller pair is pressed again. The driving roller in the machine rotates again to transport the object to be processed further upward.

When the upper end of the object to be processed enters the downstream side roller pair, the pinch roller in the downstream side roller pair is further disengaged and the drive roller in the downstream side roller pair is rotated for a predetermined period. The front end (upper end) hangs on the roller pair, hindering the conveyance. After the object to be processed is separated from the pair of rollers, if the rotation of the driving roller in the pair of rollers is stopped, the object to be processed is in a free state that is freed from the constraints of the pinch, so it just stands between the driving roller and the pinch roller of the roller pair. rise. Then, since the rear end (lower end) of the object to be processed is exactly along the axial direction of the roller, the object to be processed at this time is positioned in the parallel conveyance direction. Consequently, the subsequent processed objects are transported to the downstream side in a state parallel to the transport direction. Moreover, when the pinch roller is pressed again, the corresponding drive roller is in the state of stopping rotation, because when the pinch roller is pressed while the drive roller is in the rotating state, the processed object at that time will become relatively transported. The tilt state of the direction.

In addition, the sheet conveying mechanism of the present invention may adopt the following configuration, as described in the third aspect of the present invention, and further have a pair of width restricting members for restricting the movement of the processed object in the direction perpendicular to the conveying direction. As described in 4, a pair of width restricting members contact/separate symmetrically with respect to the conveying center perpendicular to the conveying direction, and the interval thereof can be changed. Accordingly, it is possible to properly correct meandering (lateral deviation) of the object to be processed corresponding to objects to be processed having various widths.

Then, the photograph processing apparatus of the present invention is characterized by comprising the sheet conveying mechanism described in any one of 1 to 4 of the present invention. In the photograph processing apparatus having such a configuration, it is possible to always supply the photosensitive material to the exposure unit without slanting or snaking. Therefore, it is possible to provide good-quality photographs.

Description of drawings

FIG. 1 shows an overall schematic diagram of a photo processing device according to an embodiment of the present invention.

Fig. 2 shows a schematic side view of a second delivery unit of the same embodiment.

Fig. 3 (a) represents the sectional view at A-A line place of Fig. 2, (b) represents the sectional view at B-B line place in (a), (c) represents the sectional view at C-C line place among (a).

Fig. 4 is a schematic side view of the unclamping mechanism of the same embodiment, (a) showing the unclamping state, and (b) showing the unclamping state.

Fig. 5 is a schematic side view of the conveying system on the downstream side of the second conveying unit of the same embodiment, (a) showing that the roller pair positioned on the upstream side is driven in a compacted state and the roller pair positioned on the downstream side is compacted (b) shows that the photosensitive material is hung on the roller pair located on the downstream side and the roller pair is in the state where the drive is stopped, (c) shows that the roller pair located on the upstream side is stopped, and (d) shows that the roller pair on the upstream side is stopped. The state in which the roller pair located on the downstream side is driven in a pinched state.

In the figure: 1-photo processing device, 4-second conveying unit, 5-exposure section, 15-side plate, 16-20-guiding plate, 21-29-roller pair, 21a-29a-driving roller, 21b-29b -Pinch roller, 32-Rod, 33-Cam, 35-Guide member (width limiting member), 36-Ball screw, 37-Nut, A-Print section, B-Processor section, P-Photosensitive material.

Detailed ways

Next, an embodiment of a photo processing apparatus using the transport mechanism of the present invention will be described with reference to the drawings. First, a schematic configuration of the photo processing apparatus of this embodiment will be described with reference to FIG. 1 .

Functionally, the photo processing device 1 of this embodiment is divided into a printer unit A on the upstream side and a processor unit B on the downstream side by using the central part of the rectangle (horizontal direction) close to the body of the device as a boundary. In the printing section A, image scanning exposure processing based on digital image data is performed while conveying the photosensitive material P supplied from the paper cassette 2 to the exposure section 5 at a constant speed. Then, in the processor part B, the exposed photosensitive material P is sequentially immersed in the processing liquids in various processing tanks (not shown) such as a developing tank, a fixing tank, and a stabilizing tank, and is subjected to developing and bleaching. , fixing, stabilization, etc., are then subjected to drying treatment, and then in the order sorting section 12, the dried photosensitive material P is sorted by order.

In the printing unit A, a pair of paper cassettes 2 , 2 , in which a long photosensitive material P is rolled and accommodated, are detachably mounted. The photosensitive material P pulled out from the selected photo paper box 2 is introduced into the first conveying unit 3 . A cutter (not shown) is provided in the first conveying unit 3, and the photosensitive material P introduced into the first conveying unit 3 is cut into a predetermined length in its width direction (direction perpendicular to the conveying direction of the photosensitive material P). After forming a square, it is transported to the second transport unit 4 (described later) which is a characteristic part of this embodiment. The second transport unit 4 is a transport unit that transports the photosensitive material P received at the lower position to the exposure unit 5 located above, and is connected with the first transport unit 3

Also, it is constructed so that it can be pulled out from the device body for easy maintenance.

The exposure unit 5 is a mechanism for performing image exposure processing on the photosensitive material P according to the digital image data. The exposure head 6 in the vertical direction) and the third transport unit 7 having two pairs of sub-scanning roller pairs 8, 8 sandwiching the exposure point of the exposure head 6 and arranged on the upstream side and the downstream side A so-called scanning exposure method in which the photosensitive material P received by the second conveying unit 4 is conveyed at a constant speed in the sub-scanning direction by the sub-scanning roller pair 8 and subjected to linear exposure.

The photosensitive material P exposed at the exposure unit 5 to form a latent image on the emulsion surface is then sequentially supplied and passed by the fourth conveying unit 9 and the fifth conveying unit 10 . Then, the photosensitive material P discharged from the fifth conveying unit 10 is sent to the sixth conveying unit 11 . The sixth transport unit 11 has a distributing mechanism for distributing one row of photosensitive materials P conveyed so far into two or more rows and sorting them into a parallel conveyance state.

As shown in Fig. 2 and Fig. 3, the second conveying unit 4 has a first roller pair 21, a second roller pair 22 with an appropriate interval from the upstream side (lower side) to the downstream side (upper side) of the conveying path. , the third roller pair 23, the fourth roller pair 24, the fifth roller pair 25, the sixth roller pair 26, the seventh roller pair 27, the eighth roller pair 28, and the ninth roller pair 29 constitute a plurality of roller pairs, The driving rollers 21a to 29a and the pinch rollers 21b to 29b are configured to transport the photoreceptor P from the lower position to the upper position by the rotation of the driving rollers 21a to 21b while sandwiching the photoreceptor P.

In addition, the second conveying unit 4 has a pair of side plates 15, 15 facing each other with a gap in the lateral direction, and a position across the pair of sides from the lower end position of the side plate 15 to an approximately intermediate position in the vertical direction. The plates 15 and 15 are provided with a first guide plate 16 that is bent into a "k" shape at approximately the middle position in the vertical direction, and the upper end position of the first guide plate 16 is connected at the approximately middle position in the width direction, thereby extending The band-shaped second guide plate 17 at the position on the upper end side of the side plate 15 is rotatably supported by the side plates 15, 15 at the lower end 18a facing the curved lower side of the first guide plate 16 at a predetermined interval. The third guide plate 18 on the top, and the fourth guide plate 19 that is reciprocally connected at the upper end position of the third guide plate 18 by a connecting member, leaving a predetermined distance from the curved upper side of the first guide plate 16 and facing the fourth guide plate 19. , and the fifth guide plate 20 facing the second guide plate 17 at a predetermined distance, the lower end side 20a being reciprocally supported on the side plates 15, 15.

The delivery path of the second delivery unit 4 consists of the gap between the first guide plate 16 and the third guide plate 18, the gap between the first guide plate 16 and the fourth guide plate 19, and the second guide plate 17 and the fifth guide plate 20. A gap is formed, and the photosensitive material P passes through the gap between the mutually continuous guide plates. Furthermore, the third guide plate 18, the fourth guide plate 19, and the fifth guide plate 20 are fixed to the side plates 15, 15 so as to maintain a predetermined gap with the opposing guide plates 16, 17. When this fixation is released, the third guide plate 18 and the fourth guide plate 19 rotate away from the first guide plate 16, and the fifth guide plate 20 rotates away from the second guide plate 17, thereby enabling Leave the delivery path open.

The driving rollers 21a to 25a are composed of a plurality of roller bodies (not shown) arranged at intervals in the axial direction on each rotating shaft, and are formed corresponding to the first guide plate 16 by passing a part of each roller body. The notch window (not shown) at the place protrudes into the conveying path by the side plates 15, 15 pivotally supporting its axis of rotation. The drive rollers 26a to 28a are composed of two rollers arranged to sandwich the second guide plate 17, and their rotation shafts are pivotally supported by the side plates 15, 15 so that a part of each roller protrudes into the transport path. The drive roller 29a is composed of a plurality of rollers arranged at intervals in the axial direction on one rotating shaft, and the rotating shaft is supported by side plates 15, 15 so that a part of each roller protrudes into the transport path.

Also, the drive rollers 21a to 23a are synchronously driven by one motor (not shown) via one timing belt (not shown) wound around a pulley (not shown) fixed to the end of each rotating shaft. The drive rollers 24a to 27a are synchronously driven by one motor 30 via another timing belt (not shown) wound around pulleys (not shown) fixed to the ends of the respective rotating shafts. The drive rollers 28a, 29a are synchronously driven by a motor 31 through another outer timing belt (not shown) wound on pulleys (not shown) fixed to the ends of the respective rotating shafts.

The pinch rollers 21b-23b are composed of roller bodies corresponding to the number of the driving rollers 21a-23a (not shown), and a part of each roller body passes through a notch window (not shown) formed at the corresponding position of the third guide plate 18. Show) protrude into the mode in the conveying path, its rotating shaft is supported on the third guide plate 18 by the shaft. The pinch rollers 24b, 25b are composed of roller bodies corresponding to the number of the driving rollers 24a-25a (not shown) and pass through the notch windows (not shown) that form a part of each roller body at the corresponding position of the fourth guide plate 19. ) protrudes into the conveyance path, its rotation axis is supported on the fourth guide plate 19 by the shaft. The pinch rollers 26b to 28b are composed of one (refer to FIG. 3(b)) roller body having a length corresponding to the length between the two roller bodies of the respective drive rollers 26a to 28a, and pass through the fifth roller body with a part of the roller body. The notch window formed at the corresponding position of the guide plate 20 protrudes into the conveying path, and its rotation axis is pivotally supported on the fifth guide plate 20 . The pinch roller 29b is made up of roller bodies corresponding to the number (not shown) of the drive roller 29a, and a part of each roller body passes through a notch window (not shown) formed at the corresponding position of the fifth guide plate 20 to protrude to the conveying The rotation axis of the in-path mode is pivotally supported on the fifth guide plate 20 .

In addition, as shown in FIG. 4, a plurality of rotatable rods 32, ... are fixed on the side plates 15, 15 so as to be out of contact with each rotating shaft of the pinch rollers 24b-29b. In addition, these rods 32 , . . . are rockingly operated by cams 33 , . There are three rotating shafts for the cam 33, and the two rotating shafts on the upstream side are synchronously driven by a motor through a timing belt (not shown) wound on pulleys (not shown) fixed at the ends respectively , In addition, a rotating shaft on the downstream side is driven by another motor 34 .

Then, the cam 33 fixed on each rotating shaft can synchronously rock and operate the two rods 32, 32 to set the shape of the cam 33 and the arrangement position of the rod 32. When the cam 33 rotates at a predetermined angle, the pair of levers 32 and 32 swing and contact the pair of rotation shafts adjacent to each other among the rotation shafts of the pinch rollers 24b to 29b, and the pinch rollers that normally apply force to the side of the drive rollers 24a to 29a A pair of pinch rollers adjacent to each other among 24b to 29b are separated from the drive roller (pinch release). Specifically, since the two rotation shafts on the upstream side rotate synchronously, the pinch rollers 24b to 27b are in the pinch release state at the same time, and since one rotation shaft on the downstream side rotates independently, the pinch rollers 28b and 29b are simultaneously in the state of release. Press release state.

In addition, a pair of guide members 35 , 35 parallel to the second guide plate 17 and facing each other are provided at positions in the width direction with the second guide plate 17 as a center. The guide member 35 has concave guides 35a facing each other at the open ends (refer to FIG. limits. The guide members 35, 35 are fixed to nuts 37 screwed to a ball screw 36 pivotally supported on the side plates 15, 15, and the ball screw 36 has left and right opposite threads. The upper and lower pairs of ball screws 3 are synchronously driven by one motor 38 through a timing belt (not shown) wound on pulleys (not shown) respectively fixed at the ends. As a result, when the drive motor 38 At this time, the pair of guide members 35 and 35 in the width direction are configured to be out of contact symmetrically with respect to the conveying center, and can correspond to photosensitive materials P of various sizes and widths.

The photograph processing apparatus of the present embodiment is constituted as above. Next, the manner in which the second conveyance unit 4 conveys the stored photosensitive material P to the exposure unit 5 will be described based on FIG. 5 . Furthermore, the pair of guide members 35, 35 are positioned at intervals corresponding to the width of the photosensitive material P to be conveyed (several gaps are considered).

FIG. 5( a ) shows the timing at which the leading end of the photosensitive material P lifted up from the transport path passes the roller pair 27 as the roller pair 21 to 27 is driven. At this moment, the roller pair 28 and roller pair 29 on the downstream side hold the front end of the photosensitive material P so as not to hinder the conveyance, so the pinch rollers 28b, 29b must be released from the pinch state and the driving rollers 28a, 29a must be rotated.

Then, when the front end of the photosensitive material P passes the roller pair 28 or the roller pair 29 on the downstream side, the rotation of the driving rollers 28 a and 29 a is stopped ( FIG. 5( b )). The reason is that when the pinch rollers 28b, 29b are restored to the pinched state, if the drive rollers 28a, 29a rotate, an instantaneous unbalanced pinch force will act on the photosensitive material P, causing the photosensitive material P to incline to the conveying direction. state.

Next, at the timing after the rear end of the photosensitive material P passes the roller pair 27 (that is, the timing when the photosensitive material P leaves the roller pair 27), the rotation of the driving roller 27a (driving rollers 24a to 27a) is stopped (FIG. 5(c) ). At this time, since the roller pair 28 and 29 on the downstream side are in the unpressed state, the photosensitive material P just stands up on the roller pair 27 on the upstream side. It should be noted here that the driving roller 27a of the roller pair is in a pressed state with the pinch roller 27b, and the upper end edge of the contact portion area is parallel to the rotation axis of the roller pair 27, that is, perpendicular to the conveying direction. In the so-called state where the pressing of the roller pair 28, 29 on the downstream side is released, the driving of the roller pair 27 is stopped, meaning that the rear end of the photosensitive material P has been attached to the upper end edge of the contact portion area, that is, the photosensitive material P The rear end edge of is coincident with the upper end edge of the contact site area. Therefore, if the photosensitive material P has been conveyed in an oblique state so far, the state of the photosensitive material P has been corrected. Then, since the guide members 35, 35 are provided, the photosensitive material P is not laterally displaced when its state is corrected.

After a predetermined time has elapsed, the pinch rollers 28b, 29b are switched to the pinch state, and the drive rollers 28a, 29a are started to rotate ( FIG. 5( d )). At this time, the photosensitive material P is sent to the exposure section 5 while maintaining a state parallel to the conveyance direction, and passes through the sub-scanning roller pair 8 at a constant speed in the exposure section 5 while maintaining a state parallel to the conveyance direction. The speed conveys and implements exposure processing.

As described above, according to the transport method of the photosensitive material of this embodiment, if the photosensitive material P is transported from the bottom to the top, before the photosensitive material P is transported to the exposure section 5, the roller that releases the photosensitive material P If the driving of the pair is stopped at a predetermined time, and the clamping state of the photosensitive material P is released as a roller pair located on the downstream side of the roller pair, the photosensitive material P can be freed from being clamped by any roller pair. State, so far the photosensitive material P which has an inclined state relative to the conveying direction, corrects its state along the roller pair according to its own weight, so as long as the effect of the guide members 35, 35 is combined, the photosensitive material P can be well prevented. The oblique state and meandering state are conveyed to the exposure unit 5 and the image formed in the exposure unit 5 forms an inclination or a lateral shift on the photosensitive material P, thereby affecting the commercial value of the photo.

In addition, this invention is not limited to the said Example, Various changes are possible in the range which does not deviate from the summary of this invention.

For example, as the pinching mechanism, other than the pair of rollers, a pinching member (conveying body) reciprocating on a pair of drive belts or a predetermined section may be used.

In addition, in the above-mentioned embodiment, the respective roller pairs 21 to 29 are arranged in a substantially vertical direction on the second transport unit 4, but the present invention is not limited thereto, and may be arranged in a direction inclined from the vertical direction. The key point is that in the state of unclamping the processed object, the gravity of the processed object acts on the clamping member located below, as long as the state of the processed object is corrected by its reaction force, it is the scope of the present invention. Therefore, "upper" and "lower" take their meanings as the concepts used.

Furthermore, in addition to the above-mentioned conveying method, the photosensitive material can be moved upward only by a predetermined amount by using the roller pair on the downstream side, and after reaching the junction with the upstream roller pair, stop feeding the upstream roller pair and the downstream roller pair. The drive of the pair, and then the downstream side roller pair becomes the pressing release state, and the photosensitive material falls on the upstream side roller pair, and then the downstream side roller pair is brought into the pressing state and driven to move the photosensitive material upward. method of delivery.

In addition, if the guide member 35, 35 (wide restricting member) is moved to lightly touch the side edge of the object at any time during which the object is not pinched, the lateral deviation can also be corrected.

Furthermore, the present invention is not limited to a photograph processing apparatus, and even in the case of a photograph processing apparatus, it is not limited to a use for supplying a photosensitive material to an exposure unit, and its use is not limited.

(invention effect)

As described above, in the present invention, the downstream pinching mechanism that hooks the processed object is set to a non-clamped state for a predetermined time after the object is separated from the pinching mechanism. The conveying direction is parallel to the lower end of which is supported by the clamping mechanism located below, so the processed object during this period is in a free state without being clamped by any clamping mechanism, and it falls on the clamping mechanism by its own weight. At this time, if it is held The object to be processed is in an inclined state so far, and the object to be processed is positioned parallel to the conveying direction by receiving the contact with the clamping mechanism and correcting its state. Therefore, it is possible to favorably correct skewing of the sheet-shaped to-be-processed object in the conveyance process which especially affects the quality of a resultant object.

Claims (7)

1. A sheet conveying mechanism, wherein a pinching mechanism capable of changing a state of pinching a sheet-like processed object and a state of not pinching the sheet-shaped processed object is arranged in the vertical direction, and the pinched object is pinched by the pinching mechanism while being pinched by the pinching mechanism. The drive of the mechanism transports the object to be processed to the downstream clamping mechanism located at the upper position, which is characterized by: The specified holding mechanism is controlled so as not to hold the object to be processed that has escaped from the upstream holding mechanism for a predetermined time. The state supports the lower end of the object to be processed. 2. The sheet conveying mechanism according to claim 1, characterized in that: The nip mechanism is a pair of rollers composed of a drive roller controlled to be rotationally driven and a pinch roller that can be pressed against/separated from the drive roller. 3. The sheet conveying mechanism according to claim 1 or 2, characterized in that: Furthermore, it has a pair of wide regulation members which restrict|limit the movement of the to-be-processed object in the direction perpendicular|vertical to a conveyance direction. 4. The sheet conveying mechanism according to claim 3, characterized in that: A pair of wide restricting members contacts/separates left and right symmetrically with respect to the conveying center perpendicular to the conveying direction, and the interval thereof can be changed. 5. A sheet conveying method, wherein a holding mechanism capable of changing the state of holding the sheet-shaped processed object and the state of not holding the sheet-shaped processed object is arranged in the vertical direction, and the holding mechanism holds the processed object while the holding mechanism holds the processed object. The drive of the mechanism transports the object to be processed to the downstream clamping mechanism located at the upper position, which is characterized by: A predetermined time after the object to be processed is separated from the upstream pinching mechanism, the downstream side pinching mechanism that the object to be processed is in contact with is set to the non-pinching state. , The object to be processed is supported from the lower end by the pinching mechanism on the upstream side, and then the pinching mechanism on the downstream side is changed into a pinching state, and the pinching mechanism on the downstream side is driven to further transport the object to be processed upwards . 6. The sheet conveying method according to claim 5, characterized in that: The clamping mechanism is a pair of rollers composed of a driving roller controlled by rotation and a pinching roller that can be pressed/separated from the driving roller. When the driving roller in the specified roller pair rotates, the upper end of the object to be processed When entering the downstream roller pair, the pinch roller in the downstream roller pair is separated and the driving roller in the downstream roller pair is rotated for a specified period, and then stops when the object to be processed is detached from the specified roller pair The rotation of the driving roller in the specified roller pair, and after a predetermined time, after the pressure roller in the downstream roller pair is pressed again, the driving roller in the downstream roller pair is rotated again, and the object to be processed is further compressed. Convey upward. 7. A photo processing device, characterized in that: The sheet transport mechanism according to any one of claims 1 to 4 is provided.

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