JP4656400B2 - Photosensitive material transfer device - Google Patents

Description

  The present invention relates to a feed roller for feeding a roll-shaped photosensitive material, a cutter for cutting the photosensitive material fed by the feed roller at a print size, and a receiving position for the front end of the photosensitive material fed from the feed roller. A chucker that is sandwiched between and conveyed to a delivery position, and an exposure unit that performs exposure while conveying the photosensitive material delivered from the chucker at the delivery position by an exposure roller. The present invention relates to a photosensitive material conveyance device including a conveyance control means for controlling a roller.

  Conventionally, a technique related to the photosensitive material conveying apparatus configured as described above is described in Patent Document 1. In other words, this Patent Document 1 includes a transport system that feeds a photosensitive material stored in a magazine with a driving roller of a transport mechanism, cuts the photosensitive material into a predetermined size with a cutter, and sandwiches the photosensitive material into an exposure unit. The holding and conveying mechanism holds the front end of the photosensitive material fed from the part of the cutter at the lower first position (the receiving position of the present invention), and the upper second position in the vicinity of the exposure unit (the transferring position of the present invention). ) Is provided.

  In Patent Document 1, it is possible to attach a loop box between the cutter and the exposure unit. When the loop box is installed, the leading end of a photosensitive material having a large size is fed into the exposure unit by the nipping and conveying mechanism. Then, the middle part of the photosensitive material is loosened inside the loop box.

JP 2004-21120 A (paragraph numbers [0015] to [0039], FIG. 1)

  In the transport device described in Patent Document 1, when the leading end of the transport material is sent to the exposure unit by the chucker of the nipping transport mechanism, the middle portion of the photosensitive material is loosened to print a large size photosensitive material. Is possible. However, if the tip of the photosensitive material is sent to the exposure unit by a chucker to create a slack in the middle of the photosensitive material, after the tip of the photosensitive material is delivered to the exposure unit by the chucker, the chucker is moved to this delivery position. The stopped state is maintained, and the control mode is set so that the rear end of the photosensitive material passes through the chucker and then returns to the receiving position.

  Also, considering the operation for quickly feeding the photosensitive material to be exposed next to the exposure unit, it is effective to return it to the receiving position as soon as possible after the chucker delivers the photosensitive material to the exposure unit. . However, when control is performed to return the chucker to the receiving position in a state where slack is formed in the middle part of the photosensitive material, the slack portion of the photosensitive material comes into contact with the chucker and disturbs the conveyance speed of the photosensitive material. In addition to affecting the exposure in the exposure part, if the chucker comes into strong contact with the slack portion of the photosensitive material, the photosensitive material sent to the exposure part may be pulled out and there is room for improvement.

  An object of the present invention is to rationally configure a conveying device that quickly returns a chucker after delivering a photosensitive material to an exposure unit to a receiving position.

A feature of the present invention is that a feeding roller for feeding a roll-shaped photosensitive material, a cutter for cutting the photosensitive material fed by the feeding roller at a print size, and a tip of the photosensitive material fed from the feeding roller are provided. A chucker that is nipped at the receiving position and conveyed to the delivery position, and an exposure unit that performs exposure while conveying the photosensitive material delivered from the chucker at the delivery position by the exposure roller. In the photosensitive material conveyance device including a conveyance control means for controlling the exposure roller,
A receiving roller is disposed upstream of the exposure roller in the conveyance direction of the photosensitive material,
The transport control means, when transporting a photosensitive material having a length reaching the exposure unit from the transport roller, determines the transport speed of the photosensitive material by the transport roller and the transport speed of the photosensitive material by the chucker. creating a slack and higher speed, with this after the tip of the photosensitive material was passed to the receiving roller, back to the receiving position the chucker while removing slack of the photosensitive material by continuing conveyance in receiving roller,
After the chucker is returned to the receiving position, slack is generated in the photosensitive material by driving the feeding roller at a speed higher than the conveying speed of the receiving roller .

With this configuration, when a large size print process is performed, an operation is performed in which the chuck of the receiving position sandwiches the leading end of the photosensitive material from the feeding roller and transfers it to the receiving roller under the control of the conveyance control unit. Further, during this operation, the speed at which the photosensitive material is delivered by the delivery roller is set to be higher than the moving speed of the chucker, so that slack is created in the intermediate portion of the photosensitive material immediately after delivery. In this way, after the leading edge of the photosensitive material is delivered to the exposure unit, the chucker is returned to the receiving position while removing the slack of the photosensitive material by the conveyance of the receiving roller. The control to return to the receiving position is ideal, but even before the slack is completely removed, if the slack amount is in a state that enables the operation to return the chucker, the operation to return the chucker is started. Further, when returning the chucker to the receiving position, a force in the direction opposite to the direction of returning the chucker acts on the photosensitive material due to the conveyance of the photosensitive material in the exposure unit, so that, for example, the chucker contacts the photosensitive material. Even if there is, inconvenience such as pulling back the photosensitive material from the exposed portion can be avoided. Further, after the chucker is returned to the receiving position, control is performed to produce slack in the photosensitive material by driving the feeding roller at a speed higher than the conveying speed of the receiving roller. As a result, a conveying device that quickly returns the chucker after delivering the photosensitive material to the exposure unit to the receiving position is configured.

The present invention relates to a feed roller for feeding a roll-shaped photosensitive material, a cutter for cutting the photosensitive material fed by the feed roller at a print size, and a receiving position for the front end of the photosensitive material fed from the feed roller. A chucker that is sandwiched between the chucker and conveyed to the delivery position, and an exposure unit that performs exposure while conveying the photosensitive material delivered from the chucker at the delivery position by the exposure roller. In the photosensitive material conveyance device including a conveyance control means for controlling the roller,
A receiving roller is disposed upstream of the exposure roller in the conveyance direction of the photosensitive material,
The transport control means, when transporting a photosensitive material having a length reaching the exposure unit from the transport roller, determines the transport speed of the photosensitive material by the transport roller and the transport speed of the photosensitive material by the chucker. Create a slack at a higher speed, and after transferring the leading edge of the photosensitive material to the receiving roller , remove the slack of the photosensitive material, and after removing the slack, return the chucker to the receiving position ,
After the chucker is returned to the receiving position, slack is generated in the photosensitive material by driving the feeding roller at a speed higher than the conveying speed of the receiving roller .

With this configuration, when a large-size print process is performed, an operation is performed in which the chuck at the receiving position sandwiches the leading end of the photosensitive material from the feeding roller and transfers it to the receiving roller under the control of the conveyance control unit. The speed be transmitted to the photosensitive material in the feed roller at the time of this operation is to be set to a high speed than the moving speed of the chucker, slack is created in the middle portion of the photosensitive material after transfer. In this way, after the leading edge of the photosensitive material is transferred to the exposure unit, the looseness of the photosensitive material is removed by controlling the conveyance at the exposure unit or the conveyance of the photosensitive material in the return direction by the delivery roller. Thus, after the slack of the photosensitive material is removed, the chucker is returned to the receiving position, so that the phenomenon of contacting the chucker with the intermediate portion of the photosensitive material can be avoided. That is, since the operation of returning the chucker is performed after completely removing the slack of the photosensitive material, the chucker can be returned to the receiving position without contacting the photosensitive material. Further, after the chucker is returned to the receiving position, control is performed to produce slack in the photosensitive material by driving the feeding roller at a speed higher than the conveying speed of the receiving roller. As a result, a conveying device that quickly returns the chucker after delivering the photosensitive material to the exposure unit to the receiving position is configured.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, an exposure block Ex that exposes silver salt photographic paper P (hereinafter referred to as photographic paper P) as a photosensitive material and development processing of the photographic paper P that is exposed in the exposure block Ex are performed. The developing block De and the drying block Dr for drying the photographic paper P after the development processing are stored in the dark box-structured housing 10, and the photographic paper P sent out in the horizontal direction from the top of the housing 10 after the drying processing. A photographic printing apparatus is configured that feeds from the conveyor belt 11 to a sorter (not shown), and sorts and accumulates in order units.

  This photographic printing device is called a digital minilab, and although not shown in the drawings, image information captured by photoelectrically converting a frame image of a photographic film with a film scanner, or image information taken with a digital camera Is transmitted to the photographic printing apparatus to expose the image information on the photographic paper P in the exposure block Ex.

  In the exposure block Ex, a roll-shaped photographic paper P stored in one of the two photographic paper magazines M, M is cut into a print size by the supply unit U1 and conveyed upward, and the photographic paper P is exposed to the exposure unit U2 ( In the example of the exposure unit of the present invention, the image information is exposed while transporting the transport path in the vertical posture in the vertical direction (sub-scanning direction) in the vertical position, and the photographic paper P is sent upward from the exposure unit U2. Is transferred to the horizontal direction by the sorting unit U4, and then transferred from the rear roller unit U5 to the developing block De. The exposure block Ex includes a control unit A (an example of a conveyance control unit) that performs conveyance control of the photographic paper P and exposure control.

  As shown in FIG. 2, the supply unit U1 is an advance roller comprising an introduction roller 13 and a driven roller 14 that presses and rotates to press the photographic paper P from the photographic paper magazine M and convey it. A cutter 15 for cutting the photographic paper P, a pair of feed rollers 16 and 16 for conveying the photographic paper P in a crimped state, and a dot impact type print head 17 for printing information on the back side of the photographic paper P The chucker 19 holds the photographic paper P and feeds it upward.

  The introduction roller 13 of the advance roller is driven by a stepping motor type introduction motor 13M. The cutter 15 includes a fixed blade 15A and a movable blade 15B that is operated by a driving force from a cutter motor 15M. The pair of feed rollers 16 and 16 are driven by a stepping motor type feed motor 16M.

  The chucker 19 includes a pair of clamping members 18 and 18 that perform switching operation between a crimping state in which pressure is applied by a driving force from a clamping operation unit 18A such as an electromagnetic solenoid and an open state in which the chucker 19 is opened. As shown in FIG. 3, the receiving position Q <b> 1 is moved up and down as the wound timing belt 21 moves to transmit the forward or reverse driving force from the lifting motor 20 </ b> M to one of the pair of pulleys 20 and 20. And the transfer position Q2.

  The pair of clamping members 18 and 18 are made of a material that can be securely clamped without sliding the photographic paper P, such as a flexible resin material. It is assumed that the pair of sandwiching members 18 and 18 can be switched between a state in which one member is crimped to the other and a state in which it is opened. It may be the one that operates in the opposite direction at the same time.

  Further, the guide members 22 are arranged only on the base material side of the photographic paper P at both side positions in the width direction of the photographic paper P with reference to the carrier supporting these clamping members 18. The side facing the guide member 22 is open to the side, and the photographic paper P can be loosened in a loop shape as indicated by a virtual line in FIG.

  The exposure unit U2 includes a drive-type receiving roller 25 that receives the photographic paper P from the holding member 18 of the holding and conveying system, a driven roller 26 that can be switched between a pressure-bonding position to be pressed against this and a release position that is spaced from the position. Drive-type exposure rollers 27 and 27 arranged at positions sandwiching the positions, and driven rollers 28 and 28 that can be switched to a pressure-bonding position to be crimped to these positions and an open position to be separated from each other. And a laser scanning type exposure engine 29 that performs exposure in a line shape in the main scanning direction orthogonal to the sub-scanning direction at the exposure position with respect to the photographic paper P that is conveyed.

  The exposure engine 29 adjusts the amount of light from laser light sources of the three primary colors R (red), G (green), and B (blue) housed in the casing by an acousto-optic modulation means, A structure is used in which it is sent to the exposure position while being scanned in the main scanning direction by being reflected by the mirror surface of a polygon mirror that rotates about the vertical axis. As the exposure engine 29, a liquid crystal shutter method or a DMD method can be used.

  The receiving roller 25 is rotated by a driving force from a stepping motor type receiving motor 25M, and a driven roller 26 corresponding thereto is pressed against the receiving roller 25 by a driving force from the first pressing operation portion C1 and from the receiving roller 25. The position is switched to a separated position. The two exposure rollers 27 and 27 rotate at a constant speed synchronously when the driving force from the stepping motor type conveying motor 27M is transmitted through the driving belt 27V, and the upstream of the driven rollers 28 and 28 corresponding thereto. The one on the side is switched between a pressure-bonding position for pressure-bonding to the corresponding exposure roller 27 and an open position separated from the exposure roller 27 by the driving force from the second pressure-bonding operation section C2, and the downstream of the driven rollers 28, 28. The one on the side is switched between a position where it is pressed against the corresponding exposure roller 27 and a position where it is separated from the exposure roller 27 by the driving force from the third pressure operation section C3.

  The exposure roller 27 has a structure in which a roller portion made of aluminum is formed on a metal shaft body, and a ceramic coating is applied to the outer peripheral surface of the roller portion, and the driven roller 28 is made of metal. In this shaft body, a roller part is used which is made of an elastomer material made of rubber or plastic.

  The front roller unit U3 includes a plurality of transport rollers 31 arranged to be switched between a crimped state and an open state in a curved transport path. The sorting unit U4 includes two sandwiching bodies CH that perform an operation of sandwiching the photographic paper P and sorting the photographic paper P into two rows of sorting paths. The rear roller unit U5 includes a plurality of pressure rollers 33 that convey the photographic paper P sorted by the sorting unit U4 along two rows of sorting paths.

  The developing block De includes a developing tank unit 35 having a plurality of developing tanks including a color developing tank, a bleach-fixing tank, and a stabilizing tank, and a number of pressure rollers for supplying the photographic paper P to each developing tank. It comprises the conveyance unit 36 which has. Further, the drying block Dr forms a transport path for supplying dry air from the blower 37 to the photographic paper P.

  The present invention has a feature in the control mode when supplying the photographic paper P from the supply unit U1 to the exposure unit U2, and combines the parts for supplying the photographic paper P from the supply unit U1 to the exposure unit U2. Corresponds to the conveying apparatus of the present invention.

  The transport device of the present invention arranges a first sensor S1 that is a light source 40 and a light receiving element 41 on the upstream side of the cutter 15 in the path for transporting the photographic paper P from the photographic paper magazine M to the exposure engine 29. The presence or absence of the photographic paper P is determined by arranging the second sensor S2 which is the light source 40 and the light receiving element 41 on the downstream side of the receiving roller 25 and the driven roller 26.

  As shown in FIG. 3, the cutting position by the cutter 15 is the cutting position P1, the standby position P2 downstream of the pair of feeding rollers 16, and the position where the end of the photographic paper P sandwiched by the chucker 19 is set. A delivery position P3, a position where the receiving paper 25 and the driven roller 26 can sandwich the photographic paper P is set as a delivery position P4, and an exposure standby position P5 is set upstream of the exposure roller 27 and the driven roller 28.

  In this transport apparatus, the control mode when the photographic paper P is supplied from the photographic paper magazine M to the exposure engine 29 can be expressed as shown in the flowchart of FIG.

  That is, a processing sequence and a timer value necessary for control are set based on the order data, and when the exposure engine 29 continues exposure, the second sensor S2 detects the trailing edge of the photographic paper P. The timer is started at the specified timing. The timer is also started when exposure by the exposure engine 29 is not continued (steps # 01 to # 04).

  The timer is composed of software set in the control unit A, and increases the count value over time (the count value may be decreased). After starting this timer, the cutter 15 cuts the photographic paper P at the cutting position P1 based on the timer value, the processing of transporting the photographic paper P until the leading edge reaches the standby position P2, and the leading edge is the receiving position. Processing for conveying the photographic paper P until it reaches P3, processing for conveying the photographic paper P until the leading edge reaches the delivery position P4 by the chucker 19, and these processings are executed in the order set in advance by the processing sequence (# 05). Step).

  After the leading edge of the photographic paper P is pressure-bonded by the receiving roller 25 and the driven roller 26 by executing these processes, the chucker 19 is returned to the receiving position Q1 by the chucker returning process (# 200 step). This is performed until the order is completed (step # 06).

  The processing in step # 05 will be specifically described. When printing on a photographic paper P having a relatively small size such as a service size, the photographic paper P from the photographic paper magazine M is placed at the portion of the cutter 15. After passing the length corresponding to the print size, the conveyance is stopped and the cutter 15 cuts the paper.

  Next, the photographic printing paper P cut to the print size is conveyed until the leading edge reaches the standby position P2. Note that the timing at which the photographic paper P is cut by the cutter 15 is determined by the print size. For example, when the leading edge of the photographic paper P reaches the receiving position P3, the length of the photographic paper P has been cut. If not, after the chucker 19 starts transporting the photographic paper P, the transport by the chucker 19 is stopped and the cutter 15 performs cutting.

  When the chucker 19 has already been set at the receiving position Q1 during this transport, the photographic paper P is transported by driving the feed roller 16 until the leading end reaches the receiving position P3, and the clamping member of the chucker 19 is transported. 18 to hold. If the chucker 19 is not set at the receiving position Q1 when the leading edge of the photographic paper P is transported to the standby position P2, the photographic paper P is put on standby at the standby position P2, and the chucker 19 reaches the receiving position Q1. After being set, the sheet is conveyed until its tip reaches the receiving position P3.

  Next, the driven roller 26 is set to the open position, and the chucker 19 is moved to the delivery position Q2 and stopped. In synchronization with this, the leading end of the photographic paper P from the chucker 19 is crimped by the receiving roller 25 and the driven roller 26, and the chucker 19 releases the crimping of the clamping member 18. Thereafter, the receiving roller 25 is driven to feed the leading edge of the photographic paper P upward, and the exposure engine 29 shifts to exposure.

  In order to realize such processing, the processing sequence described above is set based on the print size, and in order to realize processing in this order, the timer value corresponding to each sequence is set. The timer is started at the timing when the second sensor S2 detects the passage of the trailing edge of the photographic paper P, and the control is performed based on the set sequence. For example, feedback signals from sensors arranged at a plurality of locations are used. Based on this, the hardware is simplified and the processing speed is improved as compared with the conveyance of the photographic printing paper P.

  In the transport device of the present invention, after the slack is created in the intermediate portion of the photographic paper P (the region between the sending roller 16 and the receiving roller 25), the control for returning the chucker 19 to the receiving position Q1 is performed as early as possible. A control feature relating to this feature will be described below.

  In the chucker return process (step # 200), when the print size is acquired and the print size exceeds the set value, that is, the front end is conveyed to the delivery position P4, the rear end side is pressed against the delivery roller 16. If the length of the photographic paper P is the same length, the leading edge of the photographic paper P is pressure-bonded by the receiving roller 25 and the driven roller 26 to start transporting, while removing the slack in the intermediate portion of the photographic paper P (completely loosened). Or after removing the chucker 19 to the receiving position Q1 (steps # 201 to # 203).

  Next, in a situation where the photographic paper P is not cut, the feeding roller 16 is driven to create a loop (large slack) in the intermediate portion of the photographic paper P, and then the cutter 15 is operated to set the size. To cut the photographic paper P (Steps # 204 and # 205).

  On the contrary, when the print size is small, when the leading end is conveyed to the delivery position P4 and the trailing end is separated from the feeding roller 16, the trailing end of the photographic paper P is received. After feeding upward from the roller 25, control is performed to return the chucker 19 to the receiving position Q1 (steps # 206 and # 203).

  Thus, after the slack is formed on the photographic paper P between the receiving roller 25 and the feeding roller 16, the slack is removed, and the operation mode of each part by the control unit A until the chucker 19 is returned to the receiving position Q1. Is shown as in FIGS. 6 (a) to 6 (g).

  When the second sensor S2 detects passage of the trailing edge of the photographic paper P with the chucker 19 in the receiving position Q1, the photographic paper P is conveyed until the leading edge of the photographic paper P reaches the receiving position P3. Thereafter, the conveyance of the photographic paper P is stopped, and the leading end portion of the photographic paper P is clamped by the clamping member 18 of the chucker 19 (a).

  When the second sensor S2 detects the passage of the trailing edge of the photographic paper P and the conveyance of the photographic paper P is started, if the chucker 19 is not present at the receiving position Q1, the leading edge of the photographic paper P is detected. Is stopped at the standby position P2, and after the chucker 19 is returned to the receiving position Q1, the photographic paper P is conveyed until the leading edge of the photographic paper P reaches the receiving position P3.

  Next, with the driven roller 26 set to the open position, the chucker 19 is moved toward the exposure unit U2, and at the same time, the feeding rollers 16 and 16 are introduced at a speed slightly higher than the moving speed of the chucker 19. By driving the roller 13, slack is created in the intermediate portion of the photographic paper P (b).

  Thereafter, the chucker 19 is moved to the delivery position Q2 and stopped (c).

  Incidentally, since the print head 17 has a structure for executing printing in synchronization with the conveyance speed of the photographic paper P, when conveying the photographic paper P to the standby position P2, when conveying it to the receiving position P3, Alternatively, printing is performed on the back surface of the photographic paper P when the chucker 19 moves.

  In this way, after the photographic paper P is conveyed to the delivery position Q2, the driven roller 26 and the receiving roller 25 are set by setting the driven roller 26 to the pressure-bonding position and releasing the clamping of the clamping member 18. The front end of the photographic paper P is pressure-bonded, and the conveyance of the photographic paper P is started in the exposure unit U2, and at the same time, the conveyance by the feed rollers 16 and 16 is stopped, and the conveyance speed by the feed rollers 16 and 16 is stopped. Is reduced to remove the slack in the intermediate portion of the photographic paper P (d).

  Next, after the slack of the intermediate portion of the photographic paper P is removed (it may not be completely removed), the operation of returning the chucker 19 to the receiving position Q1 is performed (e).

  After the chucker 19 is set at the receiving position Q1 in this way, the feeding rollers 16 and 16 are driven to feed the photographic paper P at a higher speed than the conveying speed of the receiving roller 25, thereby sending the photographic paper P in the middle. A loop is created in the part, and in such a state that the loop is formed, the feeding by the feed rollers 16 and 16 is temporarily stopped at the timing when the position to be cut of the photographic paper P reaches the cutting position P1 by the cutter 15 Then, by operating the cutter 15, the photographic paper P is cut without vibrating the photographic paper P sent to the exposure unit U2 (f).

  Further, in the exposure unit U2, after the previous photographic paper P is sent out, the pair of exposure rollers 27 and the driven roller 28 of each of the 27 are set to the open position. When the photographic paper P is fed in this state, at the timing when the photographic paper P reaches a position where it can be crimped by the upstream driven roller 28, the driven roller 28 is switched to the crimping position, and the conveying force is applied. The driven roller 26 corresponding to the roller 25 is set to the open position.

  As described above, when the leading edge of the photographic paper P is conveyed in the direction of the exposure position after the cutting of the photographic paper P, the driven rollers 26 and 28 are interlocked with the leading edge position of the photographic paper P as described above. Is switched to the pressure-bonding position to reduce the impact between the leading edge of the photographic paper P and the roller, and carry in a form in which no tension is applied to the photographic paper P. The exposure engine 29 performs exposure in the main scanning direction. The control to be performed is executed (f) and (g).

  That is, even in a situation where there is a slack in the intermediate portion of the photographic paper P, the slack in the intermediate portion of the photographic paper P is removed by carrying the photographic paper P in the direction to eliminate this slack (even if the slack is completely removed). (Good) By performing the operation of returning the chucker 19 to the receiving position Q1, the chucker 19 can be returned to the receiving position Q1 while avoiding the disadvantage that the clamping members 18, 18 and the like of the chucker 19 and the photographic paper P are in strong contact. .

  Thus, by performing the operation of returning the chucker 19 to the receiving position Q1 at an early stage, when the next photographic paper P is exposed, the photographic paper P sent from the photographic paper magazine M is made to wait at the standby position P2. Since it can be nipped and transported, overall print processing time can be shortened.

  In particular, the following two control modes are conceivable as other control modes for returning the chucker 19 to the receiving position Q1 with the slack of the photographic paper P removed.

  That is, as shown in FIG. 7 (X1), the chucker 19 in which the leading end of the photographic paper P is clamped by the clamping member 18 is moved to the delivery position Q2 and stopped. As a result, a slack is formed in the intermediate portion of the photographic paper P as described above. In this state, the printing paper P is pressure-bonded by the receiving roller 25 and the driven roller 26, and the pinching of the pinching member 18 of the chucker 19 is released in this pressure-bonding state.

  Next, as shown in FIG. 7 (X2), the photographic paper P is conveyed in a state where the photographic paper P is pressed by the receiving roller 25 and the driven roller 26 in a state where the conveyance by the feed rollers 16 and 16 is stopped. Before the leading edge of the photographic paper P is sent to the exposure position, it is linearized (flattened) in such a manner that tension is applied to the intermediate portion of the photographic paper P, and the chucker 19 is received and returned to the position Q1.

  In this control, since the printing paper P is positively linearized (flattened) by removing slackness of the printing paper before the exposure by the exposure engine 29 is started, a little tension is applied to the printing paper P. By acting, it is possible to control to return the chucker 19 to the receiving position Q1 in a state where the intermediate portion of the photographic paper P is straightened.

  As another control mode, as shown in FIG. 8 (Y1), the chucker 19 in which the leading end of the photographic paper P is clamped by the clamping member 18 is moved to the delivery position Q2 and stopped. As a result, a slack is formed in the intermediate portion of the photographic paper P as described above. In this state, the printing paper P is pressure-bonded by the receiving roller 25 and the driven roller 26, and the pinching of the pinching member 18 of the chucker 19 is released in this pressure-bonding state. Immediately after this, the receiving roller 25 is slightly driven, and after the photographic paper P is fed to a position where the photographic paper P is securely gripped by the receiving roller 25 and the driven roller 26, the conveyance is stopped.

  Next, as shown in FIG. 8 (Y2), the slack at the intermediate portion of the photographic paper P is removed in such a manner that the feed rollers 16 and 16 are reversed to apply tension to the photographic paper P.

  In this way, the slack of the photographic paper P is removed, and after the intermediate portion of the photographic paper P is straightened (flattened), the chucker 19 is received and returned to the position Q1 as shown in FIG. 8 (Y3).

  In this control, since the printing paper P is positively linearized (flattened) by removing slackness of the printing paper before the exposure by the exposure engine 29 is started, a little tension is applied to the printing paper P. By acting, it is possible to control to return the chucker 19 to the receiving position Q1 in a state where the intermediate portion of the photographic paper P is straightened.

  Thus, according to the present invention, when the photographic paper P to be printed has a length that reaches the receiving roller 25 of the exposure unit from the feeding roller 16, the receiving roller 25 and the feeding rollers 16, 16 The slack of the photographic paper P is created in the middle part between the two, but the control to receive the chucker 19 and return to the position Q1 while performing straightening (flattening) by removing the slack of the photographic paper P, or slack After the control of completely removing the chucking member 19, the chucking member 18 of the chucker 19 can be moved smoothly with almost no contact with the photographic paper P. As a result, the chucker 19 can be quickly returned to the receiving position Q1. When the next photographic paper P is exposed, the photographic paper P sent from the photographic paper magazine M is held and held at the standby position P2 without being waited for, and at the time of comprehensive print processing It has achieved a reduction of.

  In particular, the photographic paper P supplied from the photographic paper magazine M has a curl and therefore has a property of curling in a predetermined direction. Although there is such a disadvantage, in the control of the present invention, the upper end side is pressure-bonded by the receiving roller 25 and the driven roller 26 and the lower end side is pressure-bonded by the sending roller 16, so that the photographic paper P is curled. Thus, the chucker 19 can be smoothly returned to the receiving position Q1.

  Although the transport direction is set to the vertical direction, the transport direction may be slightly inclined with respect to the vertical direction, and a linear guide rod or the like is brought close to the photographic paper when straightening the photographic paper. A configuration may be adopted.

Longitudinal front view of photo printing device Schematic diagram showing how the photographic paper is transported from the supply unit to the exposure unit The figure which shows the conveyance positional relationship of the printing paper from the supply unit to the exposure unit Flow chart of transfer process Flow chart of chucker return routine The figure which shows continuously the chucker and the return operation of the chucker at the time of photographic paper conveyance Continuously showing different modes of operation of the chucker Continuously showing different modes of operation of the chucker

Explanation of symbols

15 Cutter 16 Delivery roller 19 Chucker 27 Exposure roller A Conveyance control means: Control unit P Photosensitive material: Printing paper P3 Receiving position P4 Delivery position

Claims (2)

A feeding roller for feeding the photosensitive material in the form of a roll; a cutter for cutting the photosensitive material sent by the feeding roller at a print size; and a leading end of the photosensitive material sent from the feeding roller is sandwiched at a receiving position. A chucker that transports to the delivery position, and an exposure unit that exposes the photosensitive material delivered from the chucker at the delivery position while being transported by the exposure roller, and controls the delivery roller, chucker, and exposure roller. A photosensitive material transport device comprising a transport control means,
A receiving roller is disposed upstream of the exposure roller in the conveyance direction of the photosensitive material,
The transport control means, when transporting a photosensitive material having a length reaching the exposure unit from the transport roller, determines the transport speed of the photosensitive material by the transport roller and the transport speed of the photosensitive material by the chucker. creating a slack and higher speed, with this after the tip of the photosensitive material was passed to the receiving roller, back to the receiving position the chucker while removing slack of the photosensitive material by continuing conveyance in receiving roller,
A photosensitive material conveying device that creates slack in the photosensitive material by driving the feeding roller at a speed higher than the conveying speed of the receiving roller after the chucker is returned to the receiving position . A feeding roller for feeding the photosensitive material in the form of a roll; a cutter for cutting the photosensitive material sent by the feeding roller at a print size; and a leading end of the photosensitive material sent from the feeding roller is sandwiched at a receiving position. A chucker that transports to the delivery position and an exposure unit that performs exposure while transporting the photosensitive material delivered from the chucker at the delivery position by the exposure roller, and controls the delivery roller, chucker, and exposure roller. A photosensitive material transport device comprising a transport control means,
A receiving roller is disposed upstream of the exposure roller in the conveyance direction of the photosensitive material,
The transport control means, when transporting a photosensitive material having a length reaching the exposure unit from the transport roller, determines the transport speed of the photosensitive material by the transport roller and the transport speed of the photosensitive material by the chucker. Create a slack at a higher speed, transfer the leading edge of the photosensitive material to the receiving roller , remove the slack of the photosensitive material, and after removing the slack, return the chucker to the receiving position ,
A photosensitive material conveying device that creates slack in the photosensitive material by driving the feeding roller at a speed higher than the conveying speed of the receiving roller after the chucker is returned to the receiving position .

Images