JPS61102634A - Feeding device for photographic paper - Google Patents

Abstract

PURPOSE:To improve the efficiency of photographic paper printing operation by providing a one-way clutch which inhibits a guide roller from rotating in the opposite direction of a photographic paper feeding direction and a resetting means which releases the reverse rotation inhibition and allowing the guide roller to reverse. CONSTITUTION:When a guide shaft 102 is rotated by a driving motor 146 in the photographic paper feeding direction of the guide roller 86 for loading, the one-way clutch 147 idles. When the guide shaft 102 is rotated in the reverse direction, a ratchet wheel 148 is rotated through the one-way clutch 147 together with the guide shaft 102, so a lever 150 which engages the ratchet wheel 148 inhibits the reversing. Then, when the lever 150 is separated from the ratchet 148 with the exciting force of a solenoid, the loading guide roller is allowed to reverse. Consequently, the reversing is inhibited for back tension at the stop of the driving force of the driving source and the guide roller is reversed when necessary, thereby improving the efficiency of printing operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a photographic paper feeding device used for printing on continuous photographic paper.

[Background Art and Issues to be Solved] In a photo printing device using continuous photographic paper, the photographic paper wound in layers is attached to a winding drum, and the photographic paper pulled out from the winding drum is held between guide rollers and placed in a printing section. It is designed to be sent to

However, since it is necessary to use photo paper with different widths depending on the size of the printed image, efficient printing can be achieved by alternately pulling out photo paper from multiple rolls of paper and sending it to the printing section. Work becomes possible.

However, in such a printing device, the guide roller part is
When supplying photographic paper, it rotates under the driving force from the driving source, and when the driving source stops supplying driving force, it does not rotate in reverse due to the back tension on the winding drum. It is necessary to be able to manually rotate the leading edge of the photographic paper to move it.

The present invention takes the above-mentioned fact into account, and in order to be able to deal with this even when supplying photographic papers of different width dimensions, the present invention rotates by receiving a driving force from a driving source and is prevented from reversing.
It is an object of the present invention to provide a photographic paper feeding device equipped with a guide roller that can be manually rotated when necessary.

[Summary and operation of the invention] The photographic paper feeding device according to the present invention is used for a photographic paper feeding device that feeds photographic paper from a photographic paper supply drum to a printing section via a guide roller. It has a one-way clutch that enables rotation in the photographic paper feeding direction and prevents rotation in the opposite direction, and a release means that releases the one-way clutch from blocking rotation in the reverse direction and enables the guide roller to reverse rotation.

Therefore, when the photographic paper is moved in the printing direction, the driving force from the drive source acts in the idling direction of the one-way clutch to rotate the guide roller, and at the same time, the guide roller opposes the back tension and is prevented from reversing. At the time of installation, etc., the release means releases the one-way clutch from preventing rotation in the reverse direction, allowing the guide roller to rotate in the reverse direction.

[Embodiments of the Invention] In the photographic printing apparatus to which the present invention is applied, as shown in FIG. 1.2, a supply spool section 10. Front guide part 12, burning part 1
4. Rear guide part 16. A take-up spool section 18 is provided, from which photographic paper 24.26 wound onto the supply drum 20.22 of the supply spool section 10 is drawn out and selectively sent from the front guide section 12 to the printing section 14. A baking operation is performed, and the film is wound onto a take-up spool section 18 via a rear guide section 16.

(Structure of the supply spool section 10) In the supply spool section 10, upper and lower winding drums 20 and 22 are arranged with their axes horizontal, and roll sections 24A and 26A of photographic paper 24 and 26 are attached to them, respectively. .

The upper winding drum 20 of the winding drums 20 and 22 will be representatively described with reference to FIG. 3. This winding drum 20 has a rotating shaft 27
A central shaft 27A fixed to the axis of the rotary shaft 27 is pivotally supported via a bearing 32 to a bearing 30 fixed to the machine stand frame 28 which is set upright. After the roll portion 24A of the photographic paper 24, which has been rolled in advance, is inserted into the roll 11420, by rotating the lever 34 at the tip in the axial direction, the slide shaft 35 is moved to the rotation shaft 2.
7, the winding drum 20 expands in diameter to securely fix the photographic paper 24 to the winding drum 20.

The leading end of the photographic paper 24 pulled out from the roll section 24A is wound around a guide roller 36 that is pivotally supported on the machine frame 28, and then folded back by a dancer roller 38 to reach the front guide section 12. . This dancer roller 38 is pivoted to the tip of an arm 40 as shown in FIG. 3, and when the tension of the photographic paper 24 becomes large, this arm 40 rotates as shown in FIG. The rotating member 4 is provided coaxially with the brake 42 and the winding 11ii20.
1 to apply a pack tension to the photographic paper 24, and these are generally widely used and well-known structures.

A disk 44 is coaxially arranged on the outer periphery of the fixed cylinder 30 and is movable relative to each other. A roller 48 is pivotally supported on each. These rollers 4
8 is a ring groove 52 formed on the outer periphery of the flange post 50
As a result, the flange post 50 is pivotally supported in the radial direction by the plurality of rollers 48 and movement in the axial direction is restrained. A flange 54 is fixed to this flange post 50, and this flange 54 is arranged coaxially with the winding Ir 120, and moves in the width direction while coming into contact with one end in the width direction of the rolled photographic paper 24 attached to the outer periphery of the winding drum 20. Therefore, when the roll portion 24A rotates in response to the withdrawal of the photographic paper 24, the flange 54 is configured to rotate due to the frictional force with one widthwise end of the roll portion 24A. However, in order to restrict the movement of the roll portion 24A in the width direction, when attaching the roll portion 24A to the winding drum 20, the operator must
0 in the axial direction to bring the widthwise end of the roll portion 24A into contact with the flange 54, and then rotate the lever 34 to attach the roll portion 24A to the winding drum 20.

As shown in FIG. 4, one disc 44 has a pair of drive shafts 5.
6.58 is fixed at one end. These drive shafts 56
．． 58 passes through a slide bearing 60.62 that is fixed to the machine frame 28, and a connecting plate 64 is fixed to the other end to enable the drive shafts 56 and 58 to move in the axial direction at the same time. .

A rotating shaft 70 is supported via a bearing 68 on a U-shaped bracket 66 that projects from the machine frame 28 toward the connecting plate 64 . One end of this rotating shaft 7° has a male thread 7.
2 is engraved and passes through the connecting plate 64 and is screwed together with the connecting plate 64 to constitute an adjusting means. Further, a timing belt 76 is wrapped around a pulley 74 fixed to the other end of the rotating shaft 7o. As shown in FIG. 5, this timing belt 76 is wound around an intermediate pulley 78, and a timing belt 84 is wound between this intermediate pulley 78 and an output shaft pulley 82 of a motor 80.

Therefore, when the motor 80 rotates, the rotating shaft 70
2 moves the connecting plate 64 in the axial direction together with the drive shaft 56, 58, thereby moving the disc 44 in the left-right direction in FIG. Therefore, the roller 4 of the disc 44
8 connects the flange 54 to the winding drum 20 via the flange boss 5°
The flange 54 can be moved in the axial direction of the photo paper 24 in accordance with the width dimension of the roll 1 section 24A loaded into the winding drum 20, so that the widthwise central portion of the photographic paper 24 is printed in the printing section 14. It is arranged to coincide with the optical axis P. Note that the winding drum 22 disposed below the winding drum 20 also has the same structure as described above, and is given the same number.

(Structure of the front guide section 12) To explain the guide section for the photographic paper 24 as a representative, as shown in FIG.
8 rotation (DR) is held and pulled out in the direction of the force, and the light shielding material passes between the idle rollers 90 and 92 and reaches the printing section 14.

The loading guide roller 88 is supported by a shaft 94, and this shaft 94 is supported by a pin 96 near the tip of a lever 98 which is supported by the machine frame 28. This lever 9
8 receives the biasing force of a tension coil spring 100, so that the loading guide roller 88 generates a pressing force on the loading guide roller 86.

As shown in FIG. 7, the loading guide roller 86 is fixed to a guide shaft 102, and the guide shaft 102 has both ends near the machine frame 28 and a bracket lO4 fixed substantially parallel to the machine frame 28. It is pivoted to.

A pair of width regulating guide rollers 106 and 108 are attached to both sides of the loading guide roller 86. These width regulating guide rollers 106 and 108 have the same diameter as the loading guide roller 86 and serve to guide both sides of the photographic paper 24, and a flange 110 protrudes from one end in the axial direction to move the photographic paper 24 in the width direction. is now regulated.

Further, these width regulating guide rollers 106 and 108 have a small diameter portion 111 from the opposite end of the loading guide roller 86.
Disc-shaped ribs 112 are respectively protruded in the radial direction through the drive roller 11.
There are 4,116 contact surfaces. That is, the drive rollers 114 and 116 are supported parallel to the moving block 118, and their axes are perpendicular to the guide shaft 102.

Furthermore, these drive rollers 114 and 116 have their outer peripheries in contact with both axial end surfaces of the disc-shaped rib 112 and sandwich them to constitute a guide member, and the moving block 118 is connected to the guide shaft 1.
02, the width regulating guide roller 106
can move relative to the guide shaft 102 coaxially. Therefore, the set screw 120 passing through the width regulating guide roller 106 in the axial direction enters into the axial groove 122 formed on the outer periphery of the guide shaft 102, thereby causing the width regulating guide roller 106 to rotate together with the guide shaft 102. , is movable in the axial direction of the guide shaft 102.

The pair of moving blocks 118 are suspended between the machine frame 28 and the bracket 104 and are threadedly engaged with a rotating shaft 124 disposed coaxially with the guide shaft 102, as shown in FIG. An arm 128 fixed to a bracket 126 protruding from the machine frame 28 is a moving block l.
A groove 13 formed in a part of 18 in the axial direction of the rotating shaft 124
0, the moving block 118 is prevented from rotating around the rotating shaft 124, and can only move in the axial direction of the rotating shaft 124 when the rotating shaft 124 rotates. The shaft 124 is threaded in different directions at the portions where it engages with the pair of moving blocks 118, so that the moving blocks 118 are moved toward or away from each other by the same distance during one rotation.

As shown in FIG. 7, a pulley 132 is fixed to the end of the rotating shaft 124 protruding from the machine frame 28.
A timing belt 134 is wrapped around it. This timing belt 134 is wound around an intermediate pulley 78 that receives the driving force of the output shaft pulley 82, as shown in FIG. It has become.

The thread pitch of the rotating shaft 124 is the same as the thread pitch of the male thread 72 in the supply spool section 10, so that when the motor 80 rotates, the width regulating guide rollers 106, 108 are at the same distance as the flange 54 of the supply spool section 10. The width of the photographic paper 24 can be changed by moving the photographic paper 24 by a certain amount.

As shown in FIG. 7, a manual operation knob 136 is fixed to the front end of the guide shaft 102 of the loading guide roller 86 protruding from the bracket 104. As shown in FIG. This knob 1
Reference numeral 36 allows an operator to manually rotate the guide shaft 102 to feed the photographic paper 24 toward the printing section 14.

On the other hand, a gear 140 is attached to an intermediate portion of the guide shaft 102 protruding from the machine frame 28 via an electromagnetic clutch 138. This gear 140 meshes with a gear 142, and this gear 142 is fixed to the output shaft of a motor 146, which is fixed to the machine frame 28 via a bracket 144. Therefore, when the electromagnetic clutch 138 is engaged, the motor 146 transfers its driving force to the guide shaft 102.
However, when the electromagnetic clutch 138 is disengaged, the driving force from the motor 146 is not transmitted. Therefore, by opening and closing each electromagnetic clutch 138, the driving force of the motor 146 can be selectively transmitted to the pair of guide shafts arranged above and below.

Further, a ratchet wheel 148 is pivotally supported on the outer periphery of the tip of the guide shaft 102 adjacent to the gear 140 via a one-way clutch 147.
As shown in FIG. 5, the tip bowl portion of the lever 150 is engaged with the lever 8. This one-way clutch 147 idles to rotate the guide shaft 102 in the photographic paper feeding direction of the loading guide roller 86, that is, in the direction in which the photographic paper 24 is sent to the printing section 14 (in the direction of arrow DR force). When rotating in this direction, the one-way clutch 147 idles, so the ratchet wheel 148 does not rotate.

Furthermore, when the guide shaft 102 attempts to rotate in the opposite direction, the ratchet wheel 14B is rotated integrally with the guide shaft 102 via the one-way clutch 147, so that the lever 15 engaged with the ratchet wheel 148
0 is designed to prevent this reversal. Therefore, the loading guide roller 86 will not reverse despite the back tension of the photographic paper 24 by the dancer roller 38.

The middle part of the lever 150 is attached to the machine frame 28 with a screw 152.
The lever 150 engages with the ratchet wheel 148 by the biasing force of a tension coil spring 154 interposed between the machine frame 28 and the ratchet wheel 1.
48 in the clockwise direction (direction opposite to the DR force direction) in FIG.

A solenoid 156 is attached to the opposite side of the lever 150, and the excitation force of this solenoid 156 causes the lever 15 to move.
0 is separated from the ratchet wheel 148, and in this case, the loading guide roller 86 can be reversed and rotated.

, 1. , As shown in FIG. 6, the front guide portion 12
A sensor 158 consisting of a combination of a light emitting diode and a phototransistor that can detect the passage of the photographic paper 24 (the following sensors have the same structure) is located between the loading guide roller 86 and the light shielding guide roller 90. A similar sensor 160 is provided.

This front guide section 12 includes parts similar to those described above corresponding to the photographic paper 26 from the lower volume ffg22, and is given the same number as the guide section of the photographic paper 24.

Further, in this front guide section 12, the photographic paper 24.26 from the supply spool section 10 is loaded onto a guide roller 86.8.
Guide plates 162 and 164 for guiding the loading guide rollers 86 and 88 are arranged with widths gradually narrowing toward the loading guide rollers 86 and 88. Furthermore, a loading guide roller 86.
Guide plates 166, 168 are disposed between 88 and the light-shielding guide rollers 90, 92. The guide plates 166 are arranged on both sides of the loading guide roller 86 and are closer to the guide shaft 10:2 than the outer periphery of the loading guide roller 86, and as shown in FIG. 166 enters into the ring-shaped notch 90A of the light shielding guide roller 90 to reliably guide the photographic paper between the guide rollers 90 and 92.

Furthermore, the guide plates 168 are also disposed on both sides of the loading guide roller 88 so that the loading axis is smaller than the outer shape of the idle roller 88.
4, a pair of guide plates 168 are connected to each other at the ends of the light-shielding guide rollers 90 and 92, and the guide paths for the photographic papers 24 and 26 are connected to the light-shielding guide rollers 9.
0.92 (7) It is designed to merge in front.

(Description of the printing section 14) As shown in FIG. 1, the photographic paper 24 or 26 sent from the front guide section 12 passes through a cutter 169° easel mask 170 and is continuously sent to the rear guide section 16. The structure is such that the printing work is performed by temporarily stopping during transportation. An optical system such as a lens 171 and a negative carrier 173 are disposed at the bottom of this easel mask 170, a negative film 172 is placed on the negative carrier 173, and an image on the negative film placed on the optical axis P is projected by a light source 174. Printed onto photographic paper.

The negative film 172 has a configuration in which both ends in the longitudinal direction are respectively wound onto reels (not shown) and sequentially fed.

(Configuration of Rear Guide Section 16) As shown in FIGS. 9 and 10, the photographic paper 24 or 26 sent from the printing section 14 is guided by the opposed guide plotters 176 and 178, and then moved to the main drive roller 180.
and press rollers 182 and 184.

Guide blocks 176, 178 as shown in FIG.
Concave grooves 186 are respectively formed on the opposing surfaces of the photo paper 24 or 26 to restrict the movement of the photographic paper 24 or 26 in the width direction.

These guide blocks 176 and 178 are threadedly connected to the machine frame 28 and a rotating shaft 190 that is pivotally supported by a bracket 188 fixed to the machine frame 28. Threads in different directions are formed at the threaded portion and the threaded portion to the guide block 17B. Further, a portion of the guide blocks 176 and 178 abut against the bracket 188 and are prevented from rotating around the rotating shaft 190. Therefore, when the rotating shaft 190 rotates, the guide blocks 176, 178 move toward or away from each other. This rotating shaft 19
The thread pitch of 0 is made equal to each other at the threaded portion of the guide blocks 176 and 178, and the thread pitch of the supply spool portion 1
It is also equal to the pitch of the male thread 72 at 0.

A rotary shaft 190 has a pulley 192 fixed to a protruding portion from the machine frame 28, and a timing bell 194 is wound around the rotary shaft 190. This timing bell) 194 is the 11th
As shown in the figure, it is wound around an intermediate pulley 196, and the rotation of the motor 200 is transmitted to the intermediate pulley 196 via a timing belt 198.

Therefore, when the motor 200 rotates, the timing bell) 19
The rotating shaft 190 receiving a driving force through the guide blocks 176, 194 can move the guide blocks 176, 178 toward or away from each other by equal amounts to accommodate changes in the width of the photographic paper 24 or 26.

As shown in FIG. 12, the main drive roller 180 is fixed coaxially to a roller shaft 202.
The vicinity of both ends are pivotally supported by a machine frame 28 and a bracket 204 fixed to the machine frame 28 in a parallel state. Roller shaft 20 protruding from bracket 204
A knob 206 is fixed to the tip of 2 for operator operation. A pulley 208 is fixed to the tip of a roller shaft 202 protruding from the machine frame 28, and a timing belt 210 is wrapped around the pulley 208. This timing belt 210 is connected to the motor 2 as shown in FIG.
The main drive roller 180 is rotated by the rotational force of this motor 212, and feeds the photographic paper 24 or 26 by a predetermined amount. For this reason, it is preferable that the motor 212 be a pulse motor that can obtain an accurate feed amount.

Rotors 216 and 218 are supported on the outer periphery of the roller shaft 202 on both sides of the main drive roller 180. One end of a rotation guide plate 220 is fixed to the rotor 218 . As shown by the solid line in FIG. 9, this turning guide plate 220 is a guide roller 222.2 arranged approximately horizontally and provided downstream of the main drive roller 180.
The tip of the photographic paper 24 or 26 is placed between the main drive roller 180 and the guide roller 224 in a substantially vertical position as shown by the imaginary line in FIG. -24 or 26 loops 226 can be formed.

For this purpose, as shown in FIG. 12, a gear 228 is fixed to the rotor 216, which meshes with an output shaft gear 232 of a motor 230 attached to the machine frame 28, and rotates the guide plate by the rotational force of the motor 230. 20 is adapted to be rotated.

As shown in FIG. 9, the press rollers 182, 184 are pivotally supported by a movable bracket 234, and the movable bracket 234 is connected to a lever 238 via a pin 236 disposed perpendicularly to the axes of the press rollers 182, 184. It is pivoted to the tip of the shaft. This pin 236 is attached to the press roller 182. The press roller 184 is oscillated so that the axes of the press rollers 182 and 184 are arranged parallel to the main drive roller 180 so that the photographic paper 24 or 26 can be accurately held.

A tension coil spring 242 is interposed between the lever 238 and a bracket 240 attached to the machine frame 28, thereby generating a biasing force that presses the press rollers 182, 184 against the main drive roller 180. There is. Also, the elongated hole 2 formed in the middle part of the lever 238
44 has a pin 246 passing through it, and this pin 246 is arranged at a position eccentric from the rotation axis 250 of the rotation arm 248. This rotating shaft 250 is fixed to the output shaft of a motor 252, and the rotational force of the motor 252 causes the pin 24 to rotate.
By moving the lever 6 in the width direction of the elongated hole 244, the lever 2
38 can be rotated to separate the press rollers 182, 184 from the main drive roller 180.

A sensor 254 is provided to detect when the leading end of the photographic paper 24 or 26 passes between the main drive rollers 180 and 184, and sensors 256 and 258 are provided to detect the appropriate size of the loop portion 226. It is being

The guide roller 222 shown in FIG. 13 is supported by a shaft 260, and this shaft 260 is fixed to the machine frame 28 via a bracket 262.

Part of the guide roller 224 has a structure similar to that of the loading guide roller 86 shown in FIG. That is, the guide roller 224 is fixed to a guide shaft 264, and width regulating guide rollers 266, 26 are provided on both sides of the guide roller 224.
8 is placed. These width regulating guide rollers 26
6.268. has the same diameter as the guide roller 224, and a flange 270 that protrudes in the radial direction comes into contact with both widthwise ends of the photographic paper 24 or 26 being conveyed to move the photographic paper 24 or 26 in the width direction. A set screw 272 that radially passes through the width regulating guide rollers 266 and 268 is inserted into an axial groove 274 formed on the outer circumference of the guide shaft 264 along the axial direction. As a result, the width of the idle rollers 266 and 268 is controlled by the guide shaft 26.
4, but is movable in the axial direction of the guide shaft 264.

Guide roller 22 of width regulation guide roller 266.268
A disc-shaped rib 276 that protrudes from the end opposite to 4 through the small diameter portion 273 is provided with drive rollers 278 on both axial end faces.
280 are in contact with each other. These drive rollers 2
The shafts 78 and 280 have their axes parallel to each other, are arranged in the radial direction of the guide shaft 264, and are each supported by the moving block 282. These moving blocks 282 are threadedly engaged with a rotating shaft 284 that is supported by the bracket 262. This rotating shaft 284 is connected to a pair of moving blocks 2:82,
,,. KA, INIAN': JUOゎ, 86 OPAS, When the rotating shaft 284 rotates in one direction, a pair of moving blocks 2
82 move toward and away from each other by equal distances to change the interval between the width regulating guide rollers 266 and 268, so that changes in the width of the photographic paper 24 or 26 can be accommodated. The thread pitch of this rotating shaft 284 is equal to the thread pitch of the male thread 72 in the supply spool section 10.

A pulley 2 is attached to the rotating shaft 284 passing through the machine frame 28.
86 is fixed, and a timing belt 288 is wound around it. The timing belt 288 is wound around the intermediate pulley 196, as shown in FIG. 11, so that the rotation of the motor 200 is transmitted. Therefore, the rotating shaft 284 can rotate by the same number of rotations as the rotating shaft 190. In addition, as shown in FIG. 9, press rollers 182.18
4 and the guide roller 222 is a guide brake) 2
Photographic paper 24 or 26 on which 90 is placed and conveyed
is guided between guide rollers 222 and 224. The tip of this guide brake 290 is bifurcated as shown in FIG.
It is arranged closer to the shaft 260 than the outer periphery of the paper 260 to ensure that the photographic paper is fed.

As shown in FIG. 9, the photographic paper 24 or 26 sent out from the guide rollers 222 and 224 is held between a feed roller 292 and a press roller 294, and then reaches the take-up spool section 18. As shown in FIG. 11, a pulley 296 is fixed to the feed roller 292, and a timing belt 302 is wound between it and an output shaft pulley 300 of a motor 298.

The press roller 294 is pivotally supported by a bin 304 to a bracket 306, and the bracket 306 is attached to the machine frame 28.
A compression coil spring 31 is installed between the bracket 308 that is attached to the bracket 308 and the bracket 308 that is slidable.
0 is interposed between the photographic paper 2 and the feed roller 292.
4 or 26 is pressed.

(Configuration of take-up spool section 18) Attachment structure of photographic paper 24 or 26 to take-up drum 320 in this take-up spool section 18 and photographic paper 2
4 or 26 is the same as in the supply spool 10 shown in FIG. 3.4. That is, as shown in FIG. 15, this winding drum 320 is
A central shaft 327A fixed to the axis of the rotating shaft 327 is pivotally supported via a bearing 332 to a bearing 330 fixed to the machine stand frame 28 which is set upright. A rolled core 32 is attached to the winding drum 320.
When 0A is inserted and the lever 334 at the axial tip is rotated, the slide shaft 335 approaches the rotation shaft 327 and the winding drum 3
20 is expanded in diameter to securely fix the winding core 320A to the winding drum 20.

A disk 344 is coaxially disposed on the outer periphery of the fixed cylinder 330 and is movable relative to each other, and a plurality of small shafts 346 protrude from the periphery of the disk 344 in parallel with the axis, each having a tip end. A roller 348 is pivotally supported on each. These rollers 348 are inserted into a ring groove 352 formed on the outer periphery of the flange post 350°, whereby the flange post 350 is pivotally supported in the radial direction by the plurality of rollers 348 and its movement in the axial direction is restrained. has been done. A flange 354 is fixed to this flange post 350, and this flange 354 is arranged coaxially with the winding drum 320, and serves as a roll of real vapor that is wound around the outer periphery of the winding drum 320 via the winding core 320A. 24 in the width direction to restrict movement in the width direction.

Therefore, the flange 354 is configured to be able to rotate due to frictional force when the photographic paper 24 is wound up.

As shown in FIG. 16, one ends of a pair of drive shafts 356 and 358 are fixed to the disk 344. These drive shafts 356 and 358 pass through slide bearings 360 and 362 fixed to the machine frame 28, and a connecting plate 364 is fixed to the other end of the drive shafts 356 and 35.
8 can be moved in the axial direction at the same time.

A rotating shaft 370 is supported via a bearing 368 on a U-shaped bracket 366 that projects from the machine frame 28 toward the connecting plate 364 . A male thread 372 is cut into one end of this rotating shaft 370, and passes through the connecting plate 364 and is screwed into the connecting plate 364. Also, the rotation axis 3
A timing belt 198 is wrapped around a pulley 374 fixed to the other end of the timing belt 70 . As shown in FIG. 11, the timing belt 198 receives the driving force of the motor 200 together with the pulley 286 and the like.

The pitch of the male threads 372 is the same as the pitch of the male threads 72 in the supply spool section 10.

Therefore, when the motor 200 rotates, the male thread 372 of the rotary shaft 370 moves the connecting plate 364 in the axial direction together with the drive shafts 356 and 358, thereby moving the disc 344 in the left-right direction in FIG. . Therefore, the roller 348 of the disc 344 can move the flange 354 in the axial direction of the winding drum 320 via the flange post 350, so that changes in the width of the photographic paper 24 can be handled.

Next, the automatic winding guide arms 386 and 388 provided on the winding spool section 18 will be explained. As shown in FIG. 14, one end of the guide arm 386 is fixed to a shaft 390, and this shaft 390 is pivotally supported by the machine frame 28.

A guide plate 392 is provided at the tip of the guide arm 386.
is provided, and when the guide arm 386 is closest to the winding drum 320 as shown in FIG.
The photographic paper 24 or the photographic paper 26 that is placed near the outer periphery of the winding cylinder 320 (core 32
It is designed to guide you to the outer periphery of A).

A pressure roller 396 is pivotally supported at the center of the guide arm 386 by a pin 394. This pressing roller 396 pushes the tip of the photographic paper 24 or 26, which has been guided by the guide plate 392 and reached the outer periphery of the roll 11q 320, onto the winding drum 3.
The central part of a swinging arm 398 is pivotally supported by a pin 394, and a pressing roller is attached to one end of this swinging arm 398 by a pin 400. 402 is pivotally supported. Further, a tension coil spring 408 is interposed between a pin 404 attached to one end of the swinging arm 398 and a pin 406 disposed near the attachment portion of the guide arm 386 to the shaft 390, and the pressure roller 40°. It is biased in the direction of being pressed toward the outer periphery of the winding drum 320. Therefore, as shown in FIG. 17, as the outer diameter of the photographic paper 24 or 26 wound onto the winding drum 320 increases, the swing arm 398 moves the guide arm 386 counterclockwise against the biasing force of the tension coil spring 408. It can rotate relative to the winding diameter to accommodate changes in the winding diameter.

Further, a roller 410 is pivotally supported on the pin 404, and a guide arm 386 is shown in FIG.
When rotated clockwise by the maximum amount around the shaft 390 as shown in FIG. It is retracted to the outside of the flange 354 so as not to interfere with the operation of taking out the wound photographic paper 24 or 26.

On the other hand, one end of the guide arm 388 is pivotally supported to the machine frame 28 by a shaft 414. A guide plate 416 fixed to the tip of this shaft 414 is attached to the press roller 294 when the guide arm 388 approaches the winding drum 320 by the maximum amount.
and the winding drum 320, and the feeding roller 292
, 294 is guided along with the guide plate 392 to roll the photo paper 24 or 26 into the volume 1jq 320 (
It has the role of feeding to the outer periphery of the winding core 320A).

In order to ensure accurate operation of the guide plate 416, a guide plate bracket 418 is provided on the sending side of the press roller 294 to guide the fed photographic paper 24 or 26. 41B~ and the receiver are set to pass. 1. A bracket 418 is pivotally supported at the middle part of the guide arm 388 by a pin 419, and a pin 418 is supported at one end of the bracket 418.
A pressure roller 422 is pivotally supported at 20 . This pressing roller 422 is similar to the pressing roller 402 as shown in FIG.
It has a stepped shape in which parts of the two parts fit into each other in correspondence with the two parts.

That is, the pressure rollers 402 and 422 each have unevenness, and when these enter into each other, the pressure roller 3
Care is taken to prevent the leading end of the photographic paper 24 or 26 fed from the paper 96 from being pulled out from between the leading ends of the pressure rollers 402, 422 in the radial direction of the winding drum 320.

In addition, a pressure roller 426 is attached to the middle part of the bracket 418 by a pin 424, and a pressure roller 426 is attached to the other end by a pin 428.
30 are each pivotally supported.

The pressing rollers 422, 426, and 430 are all in contact with the outer periphery of the winding drum 320 to press the photographic paper 24 or the photographic paper 26.
The tip of the sheet is guided and sent toward the pressing roller 396 to be automatically wound.

A bracket is provided between the pressure roller 422 and the pressure roller 426 and between the pressure roller 426 and the pressure roller 430.
Arc-shaped guide plates 432 and 434 are respectively attached to 18 for guiding the leading end of photographic paper 24 or 26.

Since this bracket 418 is swingably attached to the guide arm 388 via a pin 419,
As shown in the figure, when the outer diameter of the photographic paper 24 or 26 wound onto the winding cylinder 320 increases, the pressure roller 426 is separated from the outer periphery of the photographic paper 24 or 26, and only the pressure roller 422 and the pressure roller 430 are attached to the photographic paper. It comes into contact with the outer periphery of the paper 24 or 26 and presses the photographic paper 24 or 26 in a stable state.

An arm 436 projects from the shaft 414, and one end of the arm 436 is pivotally supported at the tip of the arm 436 by a pin 438. The other end of this lever 440 is pivotally supported by a pin 442 to the tip of an arm 444, and the arm 444 is fixed to a shaft 390. This causes arm 436, lever 440. The arm 444 constitutes a 4m rotating chain, and the guide arm 388 is connected to the guide arm 386.
It is designed to rotate in conjunction with the shafts 390 and 414.

Here, a tension coil spring 446 is provided between the pin 438 and the guide arm 388, and a tension coil spring 448 is provided between the bin 442 and the machine frame 28, so that the guide arm 386 and the guide arm 388 are connected to the winding drum. A biasing force is applied in the direction of approaching the outer periphery of 320.

However, when the guide arms 386, 388 are separated from the outer periphery of the winding drum 320 by a predetermined amount, the tension coil springs 446, 448 shift their axes from one side to the other on the axes of the shafts 390, 414, and are guided. This configuration reverses the rotational urging force applied to the arms 386 and 388.

Therefore, when the worker rotates the guide arms 386 and 388 by a predetermined amount, the guide arms 386 and 388 are rotated as shown in FIG.
86 will be rotated in a direction approaching guide block 412. In this state, the bracket 418 attached to the guide arm 388 comes into contact with the guide block 450 fixed to the machine frame 28, thereby restricting the movement of the guide arm 388.

(Operation of the embodiment) Figures 1 and 2 show a state in which the photographic paper 24 is pulled out from the roll unit 24A attached to the roll 11→20, subjected to printing work in the printing unit 14, and wound onto the take-up spool unit 18. It is shown. In this state, the lower electromagnetic clutch 13
8 is blocked, and the leading end of the photographic paper 26 is stopped between the loading guide roller 86 and the light shielding guide roller 92, as shown in FIG. Photo paper 26
Since the reverse rotation of the loading guide roller 86 is stopped by the engagement of the one-way clutch 147 and the ratchet wheel 148 with the lever 150, it will not reverse despite the tension from the dancer roller 38.

In addition, when the photographic paper 24 or 26 is loaded into the windings 120 and 22, the electromagnetic clutch 138 is shut off, and the leading ends of these papers are connected to the guide roller □36 and the dump roller 38 after eight rolls are applied to the loading guide roller. 86.
88, and then move the loading guide roller 86 to the knob 13.
6, and the leading end of the paper is held between the loading guide rollers 86 and 88. Since the one-way clutch 147 allows the shaft 102 to rotate in the DH force direction, rotation by the knob 136 is easy.

On the other hand, when the photographic paper 26 is loaded into the lower winding drum 22 and this width dimension is input to a control device (not shown), this control device drives the motor 80 based on the input value, and the flange 54. and width regulating guide rollers 106, 108 in FIG.
drive at the same time.

That is, since the male screw 72 rotates due to the rotation of the motor 80, the drive shaft 56 moves the disk 44 in the axial direction.
accurately moves to the end position in the width direction and stops. At the same time, the rotation of the motor 80 moves the movable blocks 118 toward or away from each other via the rotating shaft 124, and the width regulating guide rollers 106 and 108 move by the same amount, so that the pair of flanges 110 move toward the photo paper 26. It stops at both ends in the width direction.

When the printing of the photographic paper 24 is completed or when printing is to be stopped, the middle part of the photographic paper 24 is cut with a cutter, and the cut front part is attached to the take-up spool section 18.
Wind it up and take it out, and the rear part is a light shielding guide roller 90.
and the loading guide roller 86. In this case, both the upper and lower electromagnetic clutches 138 are disconnected, the lever 150 shown in FIG. 5 is separated from the ratchet wheel 148,
The upper knob 136 is operated to rotate the loading guide roller 86 clockwise in FIG. 6, and the leading end of the photographic paper 24 is stopped between the loading guide roller 86 and the light shielding guide roller 90. Here, the lever 150 again engages with the ratchet wheel 148 to prevent the loading guide roller 86 from reversing. Instead of manually rotating the knob 136, only the upper electromagnetic clutch 138 is connected to reverse the motor 146. Good too.

Following this, the control device rotates the motor 200 in FIG.
rotate at the same time. As a result, the guide blocks 176 and 178 shown in FIG. 10, the width regulating guide rollers 266 and 268 shown in FIG. 13, and the flange 354 shown in FIG.
Be prepared for the width dimension.

The control device connects only the lower electromagnetic clutch 138 in FIG. 7, reversely rotates the motor 146, and drives the lower loading guide roller 86 (DR force direction photographic paper 26 is transferred to the light shielding guide roller 90. Pass through 92 spaces,
It is sent to the burning section 14. Both ends of the photographic paper 26 in the width direction are provided with flanges 54 and width regulating guide rollers 106, 10.
8, so meandering will not occur.

The leading end of the photographic paper 26 reaches the rear guide section 16, and the winding spool section 1861 and □-iML shown in FIG.
□Ka. Ka,. 1, 9□ke. circle.

Drive roller 180. It passes between press rollers 182 and 184. In this state, as shown by the solid line in FIG. 9, the rotating guide plate 220 is in a horizontal state and is in a state to guide the leading end of the photographic paper 26 between the guide trollers 222 and 224.

When the leading end of the photographic paper 26 passes through the main drive roller 180, the movement of the photographic paper 26 in the printing section 14 is controlled by the driving rotational force of the main drive roller 180. In this case, the motor 146 of the front I guide section 12 will either stop transmitting driving force by disconnecting the clutch 138, or will rotate at a slightly slower speed than the take-up spool section 180.

In this way, also in the rear guide section 16, the guide blocks 176, 178. Movement in the width direction is regulated by guide rollers 222 and 224, so meandering does not occur.

In FIG. 9, the leading edge of the photographic paper 26 passes between the guide rollers 222 and 224 and is fed into the paper.
When reaching between 292 and 294, the leading end of the photographic paper 26 is stopped between the feed roller 292 and the press roller 294. On the other hand, the main drive roller 180 feeds out the middle part of the photographic paper 26 in synchronization with the printing operation performed in the printing section 14, and also moves the rotating guide plate 220
is in a vertical state as shown by the imaginary line in FIG.

For this reason, the middle part of the photographic paper 26 is
4 and the main drive roller 180, a loop portion 226 is formed. The length of this loop portion 226 is the length of the sensor 256, 2.
58, and when this length reaches an appropriate amount, the motor 2
98 is driven, and the feed roller 292 is rotated.

Therefore, motor 298 and motor 212 are always connected to loop section 2.
The rotation is controlled so that the appropriate amount of 26 is formed.

The leading end of the photographic paper 26 sent from the feed roller 292 is sent to the take-up spool section 18. An empty winding core 320A is attached to the winding spool portion 18, and the guide arms 386, 388 are in the state closest to the outer periphery of the winding drum 320. Therefore, the leading end of the fed photographic paper 26 reaches between the pressing roller 396 and the winding drum 320 while being guided by the guide plates 392 and 416. The leading end of the photographic paper 26 fed out by the pressing roller 396 is not pressed again by the pressing rollers 402 and 422 onto the roll 1i'1320;
20 along the outer periphery of the pressing roller 426 . It passes through the suppression roller 430 and reaches near the pressure roller 396.

Therefore, when the photographic paper 26 is wound once, the leading end is held onto the outer periphery of the winding core 320A by the intermediate portion of the photographic paper 26 being fed, and automatic winding becomes possible.

As the amount of winding onto the winding drum 320 increases, the guide arms 386, 388 gradually widen as shown in FIG. 320 and wind it appropriately.

! ! When the amount of photographic paper 26 wound onto the fifth cylinder 320 reaches a predetermined value, the printing operation is stopped and the middle portion of the photographic paper 26 is cut by the cutter 169. As shown in FIG. 18, the guide arms 386 and 388 are rotated by the maximum amount and are retracted to the outside of the outer shape of the wrapped photographic paper 26, so that the photographic paper 26 can be taken out from the winding drum 320 together with the winding core 320A. can.

When continuing the printing work using the photographic paper 26,
The cut end of the photographic paper 26 is fed in by the same operation as described above, and the same operation as described above also occurs when printing with the photographic paper 26 is stopped and printing with the photographic paper 24 is restarted.

In the above embodiment, the width direction regulation when feeding the photographic paper 24 or 26 is performed by the worker inputting the width dimension into the wIm device. It may be automatically detected and the width direction regulation may be automatically performed based on this detection.

[Effects of the Invention] As explained above, the photographic paper feeding device according to the present invention is used in a photographic paper feeding device that feeds photographic paper from the photographic paper supply drum to the printing section via the guide roller. It has a one-way clutch that enables the roller to rotate in the photographic paper feeding direction and prevents rotation in the opposite direction, and a release means that releases the one-way clutch from blocking rotation in the reverse direction and enables the guide roller to reverse rotation. It can be rotated in the feeding direction of printing work by the driving force from the driving source, and when the driving force of the driving source stops, the reverse rotation is prevented in preparation for back tension, and when necessary, the guide roller is reversed to move the leading edge of the photographic paper. It has an excellent effect that can be moved.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a photo printing apparatus to which an embodiment of the present invention is applied, FIG. 2 is a perspective view showing the main parts of FIG. 1, and FIG.
The figure is the broken cross-sectional view of the line ■-■ in Figure 1.
5 is a perspective view seen from the same direction as FIG. The figure is a sectional view taken along the line XX in FIG. 9, FIG. 8 is a sectional view taken along the line XX in FIG. 9, FIG. 9 is a front view showing the rear guide section 16, and FIG. 11 is a perspective view seen from the same direction as FIG. 1 showing the drive portion of the rear guide section 16 and take-up spool section 18; FIG. 12 is a sectional view taken along the line X--X in FIG. 9;
The figures are a cross-sectional view taken along a single layer line in FIG. 9, FIG. 14 is an enlarged front view of the take-up spool section 18, FIG. 15 is a cross-sectional view taken along a double line in FIG. -XVI line sectional view,
Figures 17 and 18 are operation diagrams of Figure 14, Figure 19 is a sectional view taken along line XIX-XIX in Figure 14, and Figure 20 is a view from the same direction as Figure 14 showing the levers, etc. in Figure 14. It is a perspective view. 10＠...Supply spool part, 12...Front guide part, 14...Seizing part. 16... Rear guide section, 18... Take-up spool section, 20.22. Cage/winding drum, 24--Photo paper, 86.88--@Kite roller for loading, 102... Guide shaft , 138@...One-way clutch, 140.142...Gear, 146...Motor. 148 - Ratchet wheel, 150 - Lever, 154 - Φ tension coil spring, 156 @ - Solenoid. Agent Patent Attorney Atsushi Nakajima Figure 19

Claims (3)

[Claims] (1) Used in a photo paper feeding device that feeds photo paper from the photo paper supply drum to the printing section via a guide roller, allowing the guide roller to rotate in the photo paper feeding direction and preventing rotation in the opposite direction. What is claimed is: 1. A photographic paper feeding device comprising: a one-way clutch; and a release means that releases the one-way clutch from preventing rotation in the reverse direction and enables the guide roller to reverse rotation. (2) The photographic paper feeding device according to claim 1, wherein the release means includes a ratchet wheel attached to the guide shaft via a one-way clutch, and a bowl that engages with the ratchet wheel. . (3) The photographic paper feeding device according to claim 2, wherein the release means includes a drive means for separating the bowl from the ratchet wheel.