CN1975564A - Temporary accommodating device for long roll recording medium - Google Patents

Abstract

Temporary accommodating device for long roll recording medium, includes a roller, a pressure welding piece, a position switch framework, and a position switch control framework. The said pressure welding piece is provided at opposite positoin of the said roller, and integrally rotates with the said roller, the front end of the recording medium griped between the pressure welding piece and the said roller. The position switch framework is provided as a racing roller of the pressure welding piece to swith between pressure welding state and non-pressure welding state. When the said roller rotates to the direction of the involution recording medium, the pressure welding piece is switched into pressure welding state by controling the position switch framework. When the said roller rotates to the direction of the sending-out recording medium, and the involution lenght of the printing paper is less than the provision value, the pressure welding piece is switched from the pressure welding state into the non-pressure welding state by controling the position switch framework.

Description

Temporary storage device for long roll recording medium

Technical Field

The present invention relates to a long roll recording medium temporary storage device that temporarily stores a long roll of recording medium wound on a roll and then feeds out the stored recording medium.

Background

As for the long roll recording medium temporary storage device, as described in japanese patent laid-open No. 2000-155402, a ring portion is provided as a temporary storage device for the long roll recording medium provided between an exposure portion and a development processing portion of a photo processing device, the device being for temporarily storing a photosensitive material as the long roll recording medium.

The ring portion can absorb a ring generated between the exposure portion and the development processing portion due to a difference in the conveying speed of the photosensitive material, and can avoid the occurrence of image disturbance of the photosensitive material in exposure due to variations in vibration and load. The loop unit is provided between a first conveyance system that conveys the photosensitive material from the exposure unit and a second conveyance system that conveys the photosensitive material to the development processing unit, and each conveyance system is controlled so that the loop amount is kept within a predetermined range. After the exposure unit completes exposure processing of all the frame images and the first conveying system stops conveying the photosensitive material, the photosensitive material is cut by a cutter located on the downstream side of the loop unit and close to the exposure unit.

However, if the above-described temporary housing device for a long roll of recording medium is used, there arises a problem that the size of the photo processing device is increased in order to secure a large space for forming the loop. Further, if a complicated cleaning operation for removing paper dust and dust accumulated in the bottom of the loop portion is not performed, the trailing end of the photosensitive material hanging down after cutting comes into contact with the bottom of the loop portion, and the photosensitive material is likely to be damaged or poorly developed due to adhesion of the paper dust and the like. In addition, there is also a problem that the developer is further deteriorated.

In order not to occupy a large space required for the loop portion, it is conceivable to constitute a temporary housing device for the long roll of recording medium for temporarily housing the long roll of recording medium being conveyed while being wound onto a roll and for feeding out the housed recording medium. However, when the rolled recording medium is fed, if the trailing end of the recording medium hangs down, the same problem as described above may occur.

Disclosure of Invention

In view of the above-described problems, an object of the present invention is to provide a temporary storage device for long rolls of recording media, which is capable of preventing the recording media from being damaged by paper dust, dirt, and the like while achieving a compact device.

In order to achieve the above object, a first temporary storage device for a long roll of recording medium according to the present invention temporarily stores a long roll of recording medium fed onto a reel by winding the recording medium onto the reel and feeds out the stored recording medium, includes a reel, a pressure contact member, an attitude switching mechanism, and an attitude switching control mechanism. The spool is used for winding a long roll of recording medium, and a crimping member is provided to rotate integrally with the spool at a position opposite to the spool, and the leading end of the recording medium is clamped by the spool and the crimping member. The posture switching mechanism is configured to switch a pressure contact member that holds a leading end of the recording medium between a pressure contact state and a non-pressure contact state. The posture switching control means controls the posture switching means to switch the pressure contact member to the pressure contact state when the spool rotates in a direction in which the recording medium is wound, and controls the posture switching means to switch the pressure contact member from the pressure contact state to the non-pressure contact state when the spool rotates in a direction in which the recording medium is fed and a winding length of the recording medium is equal to or less than a predetermined value.

When the recording medium is wound around the roll, the pressure contact member that rotates integrally with the roll is switched to a pressure contact state by the posture switching mechanism, and the leading end of the recording medium is nipped between the roll and the pressure contact portion and wound in this state. When the roll rotates in the feeding direction and feeds out the recording medium, the attitude switching control means keeps the recording medium in a pressure contact state and feeds out the recording medium, and when the winding length of the recording medium is equal to or less than a predetermined value, the attitude switching means switches the pressure contact member to a non-pressure contact state. According to this configuration, by setting the predetermined length to a length that does not contact shredded paper or the like accumulated in the apparatus, the recording medium does not contact shredded paper or the like accumulated in the apparatus, and therefore the recording medium can be discharged to the downstream side without being scratched by shredded paper or the like. With the temporary housing device for a long roll of recording medium, it is not necessary to provide a large loop forming space, and miniaturization of the device can be achieved.

In a second temporary storage device for a long roll of recording medium according to the present invention, the posture switching mechanism is provided to include a biasing mechanism and a cam mechanism. The urging mechanism applies a load to the pressure contact member in the direction of the spool. The cam mechanism makes the pressure contact member to be in a pressure contact state by the urging mechanism when the spool rotates in a direction in which the recording medium is wound, and makes the pressure contact member to be in a non-pressure contact state against a load of the urging mechanism when the spool rotates in a direction in which the recording medium is fed out and a winding length of the recording medium is equal to or less than a predetermined value. The cam mechanism is provided to include a support portion for supporting the crimping piece so that the crimping piece can move freely in the diameter direction of the drum, a cam surface, and a cam plate; and a cam plate including a cam surface contacting an end surface of the support portion, moving the crimping member in a diameter direction of the spool when the spool rotates, and provided on a fixed shaft for supporting the spool.

According to the above-described temporary housing apparatus for a long roll of recording medium, the urging mechanism applies a load in the diameter direction of the roll to the pressure contact member. Further, the crimp member can be brought into the crimped state by approaching the end face of the crimp member support portion in the direction of the spool or brought into the non-crimped state by separating the end face from the spool along the cam surface. For example, the recording medium can be gripped without difficulty by rotating the roll in the winding direction at a peripheral speed of the recording medium conveyance speed, and the pressure-contact state can be released by rotating the roll in the feeding direction.

In a third temporary storage device for a long roll of recording medium according to the present invention, the attitude switching control mechanism includes a cam groove formed in a side surface of the cam plate, a connecting pin provided by an urging member toward the cam plate so that one end rotates integrally with the spool and the other end is connected to the cam groove, and a torque limiter supporting the cam plate to rotate the cam plate with respect to the fixed axis. The cam grooves are provided to include a first cam groove that causes the crimp member to be urged to the crimped state by sliding the connecting pin when the spool rotates in a direction in which the recording medium is wound. The second cam groove is deeper than the first cam groove, and when the crimping member is in a crimped state, the connecting pin is inserted into the second cam groove, and when the spool rotates in a direction of winding the recording medium, the cam plate is engaged with the connecting pin to rotate integrally with the spool, and when the spool rotates in a direction of feeding out the recording medium, the cam plate is engaged with the connecting pin to rotate integrally with the spool. The third cam groove is formed such that, when the spool rotates in a direction to wind the recording medium, the connecting pin enters a start end of the third cam groove, the start end is connected to the second cam groove, and a depth of the third cam groove at the connection is deeper than that of the second cam groove, and then the depth of the third cam groove becomes gradually shallower so that a terminal end thereof is connected to the first cam groove, and when the spool rotates in a direction to feed out the recording medium, the connecting pin slides on the third cam groove to cause the pressure contact member to approach a non-pressure contact state.

Here, the connecting pin slides along the first cam groove upon rotation of the spool in the winding direction of the recording medium. At this time, since the torque on the cam plate is small, the cam plate is kept fixed to the fixed shaft center, and the crimp member is switched to the crimp state by the end surface of the support portion sliding along the cam surface of the cam plate. Then, the linking pin entering the second cam groove is engaged with the edge portion of the second cam groove, and the torque of the spool rotating in the winding direction is transmitted to the cam plate through the linking pin. The cam plate and the spool rotate integrally by the action of the torque limiter, and the recording medium is wound while maintaining the pressure-contact state.

When the recording medium is fed from the roll, the connecting pin does not return to the first cam groove due to the step between the first cam groove and the second cam groove, but is engaged with the opposite edge portion of the second cam groove, and the torque of the roll rotating in the feeding direction is transmitted to the cam plate via the connecting pin, and the cam plate and the roll rotate integrally by the action of the torque limiter, and the recording medium is fed while maintaining the pressure contact state.

When the winding length of the recording medium is equal to or less than a predetermined value, the linking pin enters the third cam groove when the spool is rotated in the winding direction, and then slides along the third cam groove without returning to the second cam groove because of a step between the second cam groove and the third cam groove when the spool is rotated in the feeding direction. At this time, since the torque on the cam plate is small, the connecting pin is held fixed to the fixed shaft center, and the crimp member is switched to the non-crimp state by the end surface of the support portion sliding along the cam surface of the cam groove. And, the connecting pin returns from the third cam groove to the first cam groove.

The fourth temporary storage device for a long roll of recording medium according to the present invention includes a platen, a pressure contact member, and a posture switching mechanism. Wherein the roll winds and accommodates a long roll of recording medium. The pressure welding member pressure-welds the long roll of recording medium to the roll. The posture switching mechanism switches the pressure contact member between the first state in which the long roll recording medium is in a state of being pressure-contacted to the roll and the second state in which the long roll recording medium is in a state of not being pressure-contacted to the roll.

Here, the posture switching mechanism switches the position of the pressure contact member to the first state or the second state. Therefore, when the recording medium is wound around the reel, the posture switching mechanism switches the pressure contact member to the first state. And when the recording medium is fed out and the winding length of the recording medium reaches a predetermined value or less, the pressure contact member is switched to the second state.

Since it is not necessary to provide a large loop forming space, the photo processing apparatus can be miniaturized.

The fifth temporary storage device for a long roll of recording medium according to the present invention is a temporary storage device for a fourth long roll of recording medium, further comprising a posture switching control mechanism. With this posture switching control mechanism, the pressure contact member is switched to the first state when the roll rotates in the direction in which the recording medium is wound, and the pressure contact member is switched from the first state to the second state when the roll rotates in the direction in which the recording medium is fed out and the winding length of the recording medium is equal to or less than a predetermined value.

Here, the posture switching control mechanism switches the position of the pressure contact member to the first state when the spool rotates in a direction in which the long roll of recording medium is wound. The posture switching control structure switches the position of the pressure contact member to the second state when the roll rotates in a direction in which the long roll of recording medium is fed out and the winding length of the recording medium reaches a predetermined value or less. Therefore, when the recording medium is wound onto the roll, the pressure contact member is switched to the first state by the posture switching mechanism, and the leading end of the recording medium is nipped between the roll and the pressure contact member and wound in this state. Then, when the roll rotates in the feeding direction and the recording medium is fed, the posture switching control means keeps the first state of the output. When the winding length of the recording medium is equal to or less than a predetermined value, the posture switching mechanism switches to the second state.

As a result, by setting the predetermined length to a length at which the recording medium does not come into contact with the shredded paper stored in the apparatus, the recording medium can be conveyed downstream without being damaged by the shredded paper or the like.

The sixth temporary housing device for a long roll of recording medium according to the present invention is a temporary housing device for a fourth or fifth long roll of recording medium, wherein the posture switching mechanism includes an urging mechanism and a cam mechanism. Wherein the force applying mechanism applies a load toward the reel to the pressure welding piece. The cam mechanism guides the crimp member to the first state or the second state against a load applied by the urging mechanism. The cam mechanism includes a support portion and a cam plate. Wherein the support portion is used for supporting the crimping piece so that the crimping piece can freely move in the diameter direction of the winding drum. The cam plate includes a cam surface which is in contact with an end surface of the support portion and moves the crimping member in the diameter direction of the spool.

Here, the cam mechanism includes a support portion and a cam plate. Wherein the support portion is used for supporting the crimping piece so that the crimping piece can freely move in the diameter direction of the winding drum. The cam plate includes a cam surface which is in contact with an end surface of the support portion and moves the crimping member in the diameter direction of the spool. The cam mechanism moves the pressure contact member urged to the spool in the diameter direction of the spool, and the pressure contact member can be guided to the first state or the second state. As described above, according to the present invention, it is possible to provide a temporary storage device for a long roll of recording medium, which can realize miniaturization of the device and prevent the recording medium from being damaged by paper dust, and the like.

Drawings

Fig. 1 is an explanatory view of a functional block configuration of a temporary holding device;

FIG. 2 is an explanatory diagram of a functional block configuration of the photograph processing apparatus;

fig. 3 is a side view of the covering portion of the cam mechanism;

fig. 4 is an explanatory view of an overview of the posture switching mechanism;

FIG. 5 is a front view of the end face of the spool illustrating the crimping portion and the cam surface and illustrating the attitude switching control mechanism;

fig. 6A is a sectional view showing the posture switching mechanism in a non-pressure-contact state;

fig. 6B is a sectional view of the posture switching mechanism showing the pressure contact state;

fig. 7 is a side view of the attitude switching mechanism and the cam plate for explaining the attitude switching control mechanism;

fig. 8 is a plan view of a cam plate for illustrating the cam groove;

fig. 9 is a side view of a cam plate for illustrating the cam groove;

fig. 10 is a front view of the attitude switching mechanism for explaining the operation of the attitude switching control mechanism, in a state after the start of the insertion of the photographic paper;

fig. 11 is a front view of the posture switching mechanism for explaining the operation of the posture switching control mechanism, the pressure contact section being switched to the pressure contact state;

fig. 12 is a front view of the attitude switching mechanism for explaining the operation of the attitude switching control mechanism, in a state in which the photographic paper is being wound;

fig. 13 is a front view of the attitude switching mechanism for explaining the operation of the attitude switching control mechanism, in a state where the connection pin moves to feed out the photographic paper;

fig. 14 is a front view of the attitude switching mechanism for explaining the operation of the attitude switching control mechanism, showing a state in which the photographic paper is being fed;

fig. 15 is a front view of the posture switching mechanism for explaining the operation of the posture switching control mechanism, in a state in which the connecting pin moves to switch the pressure contact to the non-pressure contact state;

fig. 16 is a front view of the posture switching mechanism for explaining the operation of the posture switching control mechanism, and a state in which the pressure contact is switched to the non-pressure contact state;

fig. 17 is a front view of the temporary storage to explain the operation of the receiving roller;

fig. 18 is a front view of the temporary housing apparatus for explaining the operation of the bobbin and the receiving roller, in a state where the photographic paper is fixed;

fig. 19 is a front view of the temporary storage device for explaining the operation of the roll and the receiving roller, in a state where the roll is moving to the retreat position;

fig. 20 is a front view of the temporary storage device for explaining the operation of the roll and the receiving roller, in a state where the roll reaches the retreat position;

FIG. 21 is a front view of the temporary housing apparatus for explaining the operation of the winding drum and the receiving roller, in a state where the photographic paper blocks the optical path of the photographic paper slack amount detecting sensor;

fig. 22 is a front view of the temporary housing apparatus for explaining the operation of the bobbin, which is in a state of winding the photographic paper, and the receiving roller;

fig. 23 is a front view of the temporary housing device for explaining the operation of the bobbin, from which the photographic paper is fed, and the receiving roller;

FIG. 24 is an explanatory view of an embodiment in which the roll is not retracted and the receiving roller is switched to the feeding position;

fig. 25 is an explanatory diagram of an embodiment in which a photographic paper is fixed by using a photographic paper fixing portion.

Description of the symbols

60 temporary holding device

61 receiving roller

62 reel

63 crimping part

64 posture switching mechanism

65 posture switching control mechanism

651 cam groove

67 cam mechanism

71 reel position switching drive unit

75 photographic paper slack quantity detection sensor

76 photo paper end detecting sensor

Detailed Description

Next, a photo processing apparatus having a temporary storage device using a long roll of recording medium according to the present invention will be described.

As shown in fig. 2, the photo processing apparatus is provided with a dual system of a printing paper recording paper box 10, a cutter 20, an exposure unit 30, a printing paper end detection sensor 76, a loop unit 40, a developing unit 50, and a pre-development conveying unit 90 along a conveying path of the printing paper P. The photo paper recording carton 10 accommodates a long roll of recording medium, i.e., photo paper P, wound in a cylindrical shape. The cutter 20 cuts the photographic paper P fed from the photographic paper recording carton 10 into a predetermined printing size, the exposure section 30 is provided with an exposure source 31 for exposing the photographic paper, the photographic paper end detection sensor 76 detects the front end and the rear end of the photographic paper, the ring portion 40 prevents image disturbance due to vibration and load change of a photosensitive material during exposure, the developing section 50 performs a developing process on the exposed photographic paper P, and the pre-developing transport section 90 transports the photographic paper P to the developing section 50. In addition, a temporary housing device 60 using the present invention is further provided between the exposure section 30 and the development section 50.

The exposure section 30 accommodates an exposure source 31, and outputs RGB three-color laser beams adjusted according to print data to expose the photographic paper P conveyed along the conveyance path in a main scanning direction orthogonal to the conveyance direction.

The developing section 50 has a processing tank 51 composed of a plurality of tanks for storing a developing solution, a bleaching fixing solution, and a stabilizing solution for developing, bleaching, and fixing an exposed photographic paper, and the processing tank 51 is partitioned into a plurality of sections by partitions 52.

The photographic paper P accommodated in the photographic paper recording carton 10 is guided out by a take-out roller not shown in the figure, and is conveyed by a plurality of pairs of conveying rollers arranged along a conveying path indicated by a broken line in fig. 2 of the photographic paper P. The photographic paper P is cut into a predetermined print size by the cutter 20, is conveyed to the exposure section 30, and the photographic paper P exposed by the exposure section 30 is sent to the temporary storage device 60.

As shown in fig. 1, the temporary storage device 60 includes a pair of receiving rollers 61, a winding drum 62, a receiving roller position switching mechanism (not shown), and a position switching mechanism 70. Among them, the receiving roller 61 is used for receiving the photographic paper, the winding drum 62 is used for winding and temporarily storing the photographic paper P which is conveyed, and then the stored photographic paper P is sent to the pre-development conveying part 90 (see fig. 2), the receiving roller position switching mechanism switches the position of the receiving roller, and the position switching mechanism 70 switches the position of the winding drum 62.

Specifically, the temporary housing device 60 includes a reel 62, a pressure contact member 63, an attitude switching mechanism 64, and an attitude switching control mechanism 65 (not shown in fig. 1 and described later). The pressure contact member 63 is disposed at a position facing the platen 62, rotates integrally with the platen 62, and holds the leading end of the recording medium between the pressure contact member 63 and the platen 62. The posture switching mechanism 64 is provided to switch an idle roller as the pressure contact member 63 between a pressure contact state and a non-pressure contact state. And a posture switching control means 65 for switching the pressure contact member to the pressure contact state by controlling the posture switching means 64 when the drum 62 rotates in a direction in which the recording medium is wound, and for switching the pressure contact member from the pressure contact state to the non-pressure contact state by controlling the posture switching means 64 when the drum 62 rotates in a direction in which the recording medium is fed and a winding length of the photographic paper P is smaller than a predetermined value.

The posture switching mechanism 64 includes an urging mechanism 66 and a cam mechanism 67. The urging mechanism 66 applies a load to the pressure contact member 63 toward the spool 62. The cam mechanism 67 causes the pressure contact member 63 to be brought into the pressure contact state by the urging mechanism 66 when the roll 62 rotates in a direction in which the recording medium is wound, and causes the pressure contact member 63 to be brought into the non-pressure contact state against the urging force of the urging mechanism 66 when the roll 62 rotates in a direction in which the recording medium is fed and the winding length of the photographic paper P is smaller than a predetermined value.

The cam mechanism 67 is provided to include a support portion 67a, a cam surface 67b, and a cam plate 67 c. Wherein the supporting portion 67a is used for supporting the pressure welding member 63 so that the pressure welding member 63 can move freely in the diameter direction of the winding drum 62, the cam surface 67b is in contact with the end surface of the supporting portion 67a, when the winding drum 62 rotates, the pressure welding member 63 moves in the diameter direction of the winding drum 62, and the cam plate 67c is arranged on the fixed axis 68 for supporting the winding drum 62. Specifically, as shown in fig. 3, the cam mechanism 67 is covered with a mechanism cover 80. As shown in fig. 4, the cam mechanism cover portions 80 are fixed to both end positions of the winding drum 62 and supported by the fixed shaft center 68.

As shown in fig. 3, the cam mechanism cover portion 80 is provided with a through hole 801 at a portion corresponding to a side surface of the column. As shown in fig. 4 and 5, the support portion 67a is connected to the cam surface 67b through the through hole 801, and the crimp member 63 can be switched between the crimped state and the non-crimped state.

The switching between the crimped state and the non-crimped state will be specifically described below. In fig. 6A, the gap between the surface of the drum 62 and the surface of the crimping member 63 is a, that is, in a non-crimped state. Here, as shown in fig. 6A, when the drum 62 is rotated in the winding direction indicated by the broken line arrow, the crimping piece 63 and the support portion 67a are rotated integrally with the drum 62. At this time, since the torque on the cam plate is small, the cam plate 67c is held fixed to the fixed shaft center 68, and the end surface of the support portion 67a slides along the cam surface 67b of the cam plate 67 c. As a result, as shown in fig. 6B, there is no gap between the surface of the drum 62 and the surface of the crimping member 63, that is, a crimped state. Since the cam plate 67C is shaped such that the difference between the cam surface 67B and the outer periphery 67D of the cam is B at the shallowest portion and C at the deepest portion, when the supporting portion 67a moves from the position shown in fig. 6A to the position shown in fig. 6B, the crimp member 63 approaches the surface of the spool 62 within the range of the difference D between the deepest portion and the shallowest portion (D-C-B). That is, by making the difference D equal to the gap a, the crimp member 63 can be switched between the crimped state and the non-crimped state.

Further, although the embodiment in which the cam mechanism covering portion 80 is provided and the through hole is formed in the cam mechanism covering portion 80 has been described above, the cam mechanism covering portion 80 may be integrated with the drum 62 and the through hole may be formed in the drum 62.

As shown in fig. 5 and 7, the posture switching control mechanism 65 includes a cam groove 651 (hatched portion in fig. 7), a connecting pin 652, a torque restricting member 653, and an urging member 654, wherein the cam groove 651 is formed in a cylindrical bottom surface (upper surface) portion of the cam plate 67c, the connecting pin 652 is provided via the urging member 654 such that one end rotates integrally with the spool 62 and the mechanism cover 80 and the other end is connected to the cam groove 651, and the torque restricting member 653 supports the cam plate 67c and rotates the cam plate 67c with respect to the fixed shaft center 68.

As shown in fig. 8, the cam groove 651 is provided to include a first cam groove 651a, a second cam groove 651b, and a third cam groove 651 c. When the spool 62 rotates in the direction of winding the recording medium, the linking pin 652 slides in the first cam groove 651a, and the pressure contact member is brought into the pressure contact state.

The second cam groove 651b is deeper than the first cam groove 651a, and when the crimp member is brought into the crimped state, the linking pin 652 is caused to enter the second cam groove, and when the spool 62 is rotated in the recording medium winding direction, the second cam groove is caused to engage with the linking pin 652, and the cam plate 67c is caused to rotate integrally with the spool 62. When the roll 62 rotates in the direction of feeding out the recording medium, the second cam groove is engaged with the connecting pin 652, and the cam plate 67c rotates integrally with the roll 62.

The spool 62 is rotated in a direction to wind the recording medium so that the linking pin enters the starting end of the third cam groove, which is continuous with the second cam groove and where the third cam groove is deeper than the second cam 651b, and then the third cam groove is gradually shallower in depth so that the terminating end thereof is continuous with the first cam groove 651a, and when the spool is rotated in a direction to feed the recording medium, the linking pin 652 slides in the third cam groove to bring the crimping member to the non-crimping state.

Further, a step is present at the boundary from the first cam groove 651a to the third cam groove 651 c. That is, as shown in fig. 9, in each cam groove 651 indicated by oblique lines, the first cam groove 651a is provided higher than the second cam groove 651b in the step ab. The second cam groove 651b is provided higher than the third cam groove 651c in the step bc. Further, the third cam groove 651c, which is gradually shallower in depth, is provided higher than the first cam groove 651a in the step ca. The second cam groove 651b is divided into two regions by a step bb, and the region on the side of the first cam groove 651a is provided higher than the third cam groove 651 c. That is, the sliding order of the connecting pin 652 is: the first cam groove 651a, the second cam groove 651b, and the third cam groove 651c are then returned to the first cam groove 651a again without sliding in the reverse order.

The above-described specific operation will be described in detail with reference to fig. 10 to 16. First, as shown in fig. 10, when the photographic paper P is inserted, the drum 62 rotates in the winding direction of the photographic paper P, and at this time, the cam plate 67c is kept fixed to the fixed shaft center 68 due to the small torque of the cam plate 67c, and the connecting pin 652 rotating integrally with the drum 62 slides along the first cam groove 651 a. The crimping member 63 is switched to the crimping state by the end face of the holding portion 67a sliding along the cam face 67b of the cam plate 67 c. (refer to FIG. 11)

At this time, as shown in fig. 9 and 12, the connecting pin 652 is engaged with the edge portion of the second cam groove 651b after passing through the step ab, and the torque of the spool 62 rotating in the winding direction is transmitted to the cam plate 67c via the connecting pin 652. The cam plate 67c rotates integrally with the drum 62 and the pressure-bonding section 63 by the action of the torque limiter 653, and winds the photographic paper P while maintaining the pressure-bonding state. After the photographic paper P is wound for the second turn, the winding drum 62 and the pressure contact member 63 are in a pressure contact state, and no gap is left between the two. Therefore, as shown in fig. 12, the photographic paper P is wound to the outer peripheral side of the pressure contact member 63.

Next, when the rolled-up photographic paper P is fed out from the roll 62 (the rotation direction of the roll 62 is opposite to the winding direction), as shown in fig. 9 and 13, since a step ab is formed between the first cam groove 651a and the second cam groove 651b, the connecting pin 652 is not returned to the first cam groove 651a, but is engaged and connected with the other edge portion of the second cam groove 651b via a step bb.

After the connecting pin 652 is fitted and connected to the other edge portion of the second cam groove 651b, as shown in fig. 14, the torque of the drum 62 rotating in the feeding direction is transmitted to the cam plate 67c via the connecting pin 652, and the cam plate 67c rotates integrally with the drum 62 and the pressure-bonding section 63 by the action of the torque limiter 653, and the photographic paper P is fed while maintaining the pressure-bonding state.

When the winding length of the photographic paper P is equal to or less than a predetermined value, as shown in fig. 9 and 15, when the spool 62 is rotated in the winding direction, the connecting pin 652 enters the third cam groove 651c through the step bc. Further, the connecting pin 652 is stopped by the step bb and cannot return to the area of the second cam groove 651b on the side of the first cam groove 651 a.

Then, when the spool 62 is rotated in the feeding direction, as shown in fig. 16, the connecting pin 652 slides along the third cam groove 651c without returning to the second cam groove 651b because a step bc is present between the second cam groove 651b and the third cam groove 651 c. At this time, since the torque on the cam plate 67c is small, the cam plate 67c is held fixed to the fixed shaft center 68, and the crimp member 63 is switched to the non-crimping state by the end surface of the support portion 67a sliding along the cam surface 67b of the cam plate 67 c. Also, the linking pin 652 is returned from the third cam groove 651c to the first cam groove 651 a.

The temporary storage device 60 has a position switching mechanism 70 that switches between a first position 70a and a second position 70b, the first position 70a being a normal position of the drum 62 shown in fig. 1, and the second position 70b being a retracted position of the drum 62 shown in fig. 17. Then, the temporary storage device 60 starts winding the photographic paper P at the first position 70a, and starts feeding out the wound photographic paper P at the second position 70 b.

As shown in fig. 17, the receiving roller 61 also includes a receiving position 61a and a receiving roller position switching mechanism (not shown), the receiving position 61a sends the photographic paper P from the exposure unit 30 to the drum 62, and the receiving roller position switching mechanism switches the position of the photographic paper P to a sending position 61b from the drum 62 to the pre-development transport unit 90.

Specifically, the position switching mechanism 70 includes a roll position switching drive section 71, a conveyor belt 72, a gear 73, and a slider 74. A reel position switching drive portion 71 is provided at both ends of the reel 62, a belt 72 is provided to be interlocked with the reel position switching drive portion 71, gears 73 are provided as operation terminals of the belt 72 at upper and lower portions of the temporary storage 60, and a slider 74 is provided on the reel position switching drive portion 71 to move the reel 62 and the reel position switching drive portion 71. For example, as shown in fig. 1, when the roll 62 is at the normal position of the temporary storage 60, the roll position switching drive section 71 starts driving, the belt 72 rotates up and down with the gear 73 at both ends, and the roll 62 and the roll position switching drive section 71 move along the slide 74. As a result, as shown in fig. 17, the roll 62 and the roll position switching drive portion 71 move to the retracted position of the temporary storage 60.

Hereinafter, the operation from the time when the temporary housing device 60 houses the photographic paper P exposed by the exposure unit 30 to the time when the housed photographic paper P is sent to the pre-development conveying unit 90 will be described.

As shown in fig. 2, a paper end detection sensor 76 is provided on a paper P conveyance path of the photo processing apparatus. When the paper edge detection sensor 76 detects the leading edge of the paper P, the photo processing apparatus determines the leading edge of the paper P. Then, as shown in fig. 1, when the exposed photographic paper P is inserted into the temporary housing means 60 by the receiving roller 61, the photographic processing apparatus slides the supporting portion 67a on the cam surface 67b to press the press-contact member 63 against the drum 62 and fix the photographic paper P. The paper segment detection sensor 76 is not limited to the position shown in fig. 2, and may be disposed on the conveyance path of the printing paper P in front of the temporary storage 60.

As shown in fig. 18, when the photographic paper P is fixed between the roll 62 and the press-contact portion 63, the roll 62 starts moving from the normal position of the temporary storage 60 to the retracted position as shown in fig. 19.

As shown in fig. 20, when the drum 62 reaches the retracted position of the temporary storage 60, the operation of the drum 62 is stopped, but the amount of slack of the photographic paper P increases as the photographic paper P is continuously fed by the receiving roller 61.

As shown in fig. 21, the temporary storage device 60 is provided with a paper slack amount detection sensor 75 including a light projection unit 75a and a light receiving unit 75b, and when the optical path of the paper slack amount detection sensor 75 is blocked by the paper P, the light from the light projection unit does not reach the light receiving unit, and the photo processing device starts the winding operation of the roll 62.

As shown in fig. 22, the photographic paper P is wound by the winding operation of the roll 62, and when the light emitted from the light projection unit of the photographic paper slack amount detection sensor 75 reaches the light receiving unit, the photographic processing apparatus stops the winding operation of the roll 62.

The process of the drum 62 repeating the process of winding the drum 62 when the paper slack amount detection sensor 75 detects that the light path is blocked by the paper P; when the light emitted from the light projection unit of the paper slack amount detection sensor 75 reaches the light receiving unit, the winding of the drum 62 is stopped.

Once the rear end of the photographic paper P is detected by the photographic paper end detection sensor 76, the winding operation of the bobbin 62 is stopped before the rear end of the photographic paper P passes through the receiving roller. When the winding operation is stopped, the receiving roller 61 is switched from the receiving position 61a to the feeding position 61b as shown in fig. 17.

Then, the reel 62 starts the feeding operation, and the fed photographic paper P is fed to the pre-development conveying section 90 by the receiving roller 61 as shown in fig. 23. When the roll 62 completely feeds out the wound photographic paper P, it moves from the retracted position of the temporary storage device 60 to the normal position. That is, the operation of the drum 62 when the leading end of the photographic paper P is fed out is reverse to the operation shown in fig. 19.

When the spool 62 reaches the normal position of the temporary storage device 60, the photo processing device slides the support portion 67a on the cam surface 67b to release the pressure of the pressure contact member 63 against the spool 62, thereby releasing the fixing of the photographic paper P. When the pressure contact is released, all the sheets P are sent to the pre-development conveying section 90, and the receiving roller 61 is switched from the sending position 61b to the receiving position 61 a.

Other embodiments will be described below. In the above-described embodiment, the embodiment in which drum 62 is retracted from the normal position of temporary storage 60 to the retracted position has been described, but drum 62 may not be retracted. For example, if the rear end of the photographic paper P is detected by the photographic paper end detection sensor 76 before the photographic paper P is pressed against the drum 62, that is, before the state shown in fig. 18 is reached, and therefore it is not necessary to wind the photographic paper P around the drum 62 any more, the drum 62 is not retracted to the retracted position of the temporary storage device 60, and the receiving roller 61 is switched from the receiving position 61a to the feeding position 61b as shown in fig. 24.

In the present embodiment, whether the drum 62 is retracted or not can be selected according to the length of the photographic paper P. That is, when the length of the photographic paper P is equal to or greater than a certain length, the drum 62 is retracted to the retracted position; when the length of the photographic paper P is shorter than a certain length, the drum 62 is not retracted.

In the above embodiment, the embodiment of the idle roller used as the pressure contact member 63 is described, but the pressure contact member 63 is not limited to the cylindrical shape. For example, as shown in fig. 25, instead of the idle roller, a concave portion may be provided at both ends of the drum 62, and a paper fixing portion 69 may be provided to sandwich the paper P and the drum.

The above-described embodiment is merely an example of the present invention, and the specific configuration of each component mechanism may be appropriately changed in design within the range where the present invention is applicable.

Claims (6)

1. A long roll recording medium temporary storage device comprising a winding drum for winding a long roll recording medium and a crimping member provided to rotate integrally with the winding drum at a position opposed to the winding drum and clamping a leading end of the recording medium by the winding drum and the crimping member,

it is characterized by also comprising:

a posture switching mechanism that switches the crimping member between a crimped state and a non-crimped state;

an attitude switching control mechanism for controlling the attitude switching mechanism so that the pressure contact member is switched to the pressure contact state by the control attitude switching mechanism when the spool rotates in a direction in which the recording medium is wound; when the roll rotates in a direction in which the recording medium is fed out and a winding length of the recording medium reaches a predetermined value or less, the pressure contact member is switched from the pressure contact state to the non-pressure contact state by the control posture switching mechanism.

2. The long roll recording medium temporary housing apparatus according to claim 1, characterized in that:

the posture switching mechanism comprises a force application mechanism and a cam mechanism; wherein,

the force application mechanism applies a load to the pressure contact member toward the spool;

the cam mechanism includes: a support portion for supporting the crimping member so that the crimping member is movable in a diameter direction of the reel; the cam plate includes a cam surface contacting an end surface of the support portion, moves the crimping member in a diameter direction of the spool when the spool rotates, and is provided on a fixed spindle for supporting the spool; the cam mechanism is used for enabling the crimping piece to be in a crimping state through the force application mechanism when the winding drum rotates towards the direction of winding the recording medium; when the roll rotates in a direction in which the recording medium is fed out and a winding length of the recording medium is equal to or less than a predetermined value, the pressure contact member is brought into a non-pressure contact state against the urging force of the urging mechanism.

3. The long roll recording medium temporary housing apparatus according to claim 2, wherein:

the posture switching control mechanism includes: a cam groove formed on a side surface of the cam plate; a connecting pin provided by the urging mechanism so that one end rotates integrally with the spool and the other end is connected to the cam groove; a torque limiter supporting the cam plate to rotate relative to the fixed axis;

the cam grooves include a first cam groove, a second cam groove, and a third cam groove, wherein,

the first cam groove is provided so that, when the spool rotates in a direction in which a recording medium is wound, the connecting pin is slid to bring the crimping member into a crimped state;

the second cam groove is deeper than the first cam groove and is provided so that the connecting pin enters the second cam groove when the crimp member is brought to the crimped state, and the cam plate is rotated integrally with the spool by being brought into contact with the connecting pin through the second cam groove;

the starting end of the third cam groove is connected with the second cam groove and the depth of the third cam groove at the connection position is deeper than that of the second cam groove, and then the depth of the third cam groove becomes gradually shallower and the terminal end thereof is connected with the first cam groove; when the spool rotates in a direction to wind the recording medium, the connecting pin enters the start end of the third cam groove, and when the spool rotates in a direction to feed the recording medium, the connecting pin slides on the third cam groove to cause the crimping member to approach a non-crimping state.

4. A long roll recording medium temporary housing apparatus includes a winding drum for winding a long roll recording medium and a crimping member provided to crimp the recording medium to the winding drum,

it is characterized by also comprising:

an attitude switching mechanism for switching the pressure contact member between a first state in which the recording medium is in a state of being pressure-contacted to the platen and a second state in which the recording medium is in a state of not being pressure-contacted to the platen.

5. The long roll recording medium temporary housing apparatus according to claim 4, further comprising an attitude switching control mechanism for controlling the attitude switching mechanism to switch the pressure contact member to the first state when the spool rotates in a direction in which the recording medium is wound; when the roll rotates in a direction in which the recording medium is fed out and a winding length of the recording medium reaches a predetermined value or less, the pressure contact member is switched from the first state to the second state.

6. The long roll recording medium temporary housing apparatus according to claim 4 or 5, wherein:

comprises a force application mechanism and a cam mechanism; wherein,

the force application mechanism applies a load to the pressure contact member toward the spool;

the cam mechanism includes: a support portion for supporting the crimping member so that the crimping member is movable in a diameter direction of the reel; and a cam plate including a cam surface contacting an end surface of the support portion, the cam plate moving the crimp member in a diameter direction of the spool when the spool rotates.

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