JPH046024Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a paper conveyance drive control device for a diazo copying machine.

(Prior art) In a diazo copying machine, the original paper is fed into the machine from the original paper insertion slot, and the photosensitive paper is automatically fed by the photosensitive paper feed roller and fed into the machine. After being aligned by an alignment member, it is sent to the exposure section. The rotation and stopping of the photosensitive paper feeding roller is controlled by a clutch such as a spring clutch connected to the output side of the timing cam for opening and closing the leading edge alignment member. On the other hand, another clutch is connected to the input side of the clutch, and when the photosensitive paper to be merged with the original paper is not fed, the other clutch switches from the connected mode to the disconnection mode and transfers the paper to the original paper conveying means. The drive is cut off, and the conveyance of the original paper is stopped.

In such a device, the former clutch is continuously disengaged in order to make the timing cam one revolution, but in this case, it is assumed that a non-feeding of the photosensitive paper is detected, and the timing cam is released before the timing cam makes one revolution. In other words, if the latter clutch was switched to the cutting mode in order to stop conveyance of the original paper before the former clutch switched from the linking mode to the cutting mode, the cause of the defect in the photosensitive paper feed section was removed. Before the next drive starts, the photosensitive paper feed roller rotates unnecessarily as the former clutch switches from the connection mode to the disconnection mode, causing the photosensitive paper to be fed to a halfway position. become.

(Purpose) The purpose of this invention is that when the photosensitive paper that should be merged with the original paper fails to be fed, the photosensitive paper feed unit will be fed at the next drive start after removing the defective factor in the photosensitive paper feeding section. An object of the present invention is to provide a paper conveyance drive control device for a diazo copying machine that prevents rollers from rotating unnecessarily.

(Structure) In order to achieve the above object, the present invention connects a second clutch that controls the rotation and stop of the timing cam and photosensitive paper feed roller to the first clutch on the drive side, and The photosensitive paper detection feed position detects whether or not the photosensitive paper has been fed from the paper roller to the conveyance path. If the paper is not fed, this detection signal causes the timing cam to rotate back to the initial rotation position. The present invention is characterized in that the first clutch is switched to a disengagement mode.

The present invention will be explained below based on one embodiment.

In FIG. 1, the original paper 0 is inserted through the original paper insertion slot 12 while being aligned with the original paper base 11 extending toward the front from the front of the copying machine 10. The insertion of the original paper is detected by the original paper detection device 15 arranged in the original paper path 14, and based on the signal from the detection device 15, the original paper tray is A sheet of photosensitive paper S is sent out from the lower photosensitive paper storage section by a photosensitive paper feed roller 16.

The original paper and the photosensitive paper are guided to a merging passage 61, which is an example of a conveyance passage, while merging with each other, and the leading edges of both papers collide with a leading edge aligning member 17, which is disposed in this passage so that its free end 17a can move forward and backward. Now you can align the tips. Immediately after the tips are aligned, aligning member 1
7 rotates counterclockwise about the shaft 18 to open the merging passage 61, and at the same time, the presser roller 20, which had been separated upward from the feed roller 19, comes into pressure contact with the feed roller 19, and the overlapping original paper and The photosensitive paper is attached to an endless belt 21 and a transparent cylinder 22 for exposure.
The light is sent to the exposure section, which consists of

As is well known, the transparent cylinder 22 is rotated in the direction of arrow a by the above-mentioned endless belt 21 which is stretched around one belt drive roller 23 parallel to the transparent cylinder 22 and a plurality of guide rollers 24, 25, 26. It can be rotated.

The original paper 0 and the photosensitive paper S that have passed through the exposure section are guided by a guide receiving plate 27 and fed into a shifting device 30 consisting of a pair of rollers 28 and 29 rotating in the directions of the arrows. Of the pair of rollers, the roller 28 on the side that contacts the original paper has a circumferential speed that is approximately the same as the paper feed speed in the exposure section, and the other roller 29, that is, the roller on the side that makes contact with the photosensitive paper, has the paper feed speed in the exposure section. It is rotated at a circumferential speed somewhat higher than that of the Therefore, the original paper and photosensitive paper fed into the shifting device advance with the leading edge of the photosensitive paper ahead of the leading edge of the original paper.

The leading edge of the preceding photosensitive paper is separated from the original paper by a separating rotary plate 31, and then separated by a roller 32,
Guide path 33, roller pair 34, swingable guide plate 35, roller 36, guide plate 37, roller 38
After passing through a pair of rollers 38 consisting of rollers a and 38b and being developed there, the sheet passes between a lower guide plate 40 and an upper guide section 41 as copy paper, and is then transported by a pair of copy paper discharge rollers 42.
The copy paper is discharged onto the copy paper tray 43. On the other hand, the original paper separated from the photosensitive paper is discharged onto an original paper holder (not shown) by a pair of rollers 44.

When the original paper is inserted through the original paper insertion slot 12, the photosensitive paper feed roller 16 rotates in the direction of the arrow based on the signal from the original paper detection device 15, and the photosensitive paper S is sent out. If the photosensitive paper is not fed even though the original paper has been inserted, due to a malfunction in the paper feeder or because the photosensitive paper is not stored in the loading table, only the original paper will be fed into the copier. This may not only lead to transcription errors but also damage the precious original paper. Particularly, in the case of a copying machine equipped with an automatic separating device including a shifting device, the original paper may be damaged by the automatic separating device.

In order to avoid such problems, if the photosensitive paper is not fed even though the original paper has been inserted, the system detects the non-feeding of the photosensitive paper and stops the feeding of the inserted original paper. Therefore, the pair of original paper feed rollers 13 and the feed roller 19 are automatically stopped.

In order to detect whether or not the photosensitive paper has been fed,
As shown in FIG. 2, the upper guide plate 260 of the photosensitive paper
A tongue piece 261, which has a lower light reflectance than the photosensitive paper, for example, is black, is arranged so as to protrude forward from a part of the leading edge of the photosensitive paper. Below the tip of this tongue piece 261 are a light emitting element 262 and a light receiving element 263 attached to a lower guide plate 260b of photosensitive paper.
(Fig. 3) is placed, and the photosensitive paper is attached to the tongue piece 26.
1, the light emitting element 262
The light reflected from the back side of the photosensitive paper is reflected on the light receiving element 26.
3 to detect the presence of photosensitive paper. If the photosensitive paper is not present below the tongue 261, the light from the light emitting element 262 will be absorbed by the tongue 261, or reflected light sufficient to activate the light receiving element 263 will not be obtained.

In this way, feeding or non-feeding of the photosensitive paper is detected, and if the photosensitive paper is fed, the original paper conveying device consisting of the pair of original paper feeding rollers 13 and the feeding roller 19 is operated to If the paper is not fed, the driving of the original paper conveying device is cut off and the device is stopped. Note that details regarding this will be described later.

Here, in FIG. 4, both side plates 315, 31
A gear 319 is rotatably mounted on the shaft 317 of the feed roller 19, which is rotatably supported by the roller 6 (FIG. 5), and this gear 319 is driven by a drive gear system 318. . The shaft 317 is provided with a spring clutch 321 as a first clutch that connects and connects rotation transmission from a drive source consisting of a drive gear system 318 and a gear 319 to the pair of original paper feed rollers 13 and the feed roller 19. There is.

As shown in FIGS. 5 and 6, teeth 322a are provided at regular intervals on the circumferential surface of the sleeve 322 of the spring clutch 321 with a predetermined pitch. Hook-shaped piece 324a of locking lever 324 that is freely pivoted
can be freely connected and disconnected.

As shown in FIG. 6, a solenoid 327 is connected to one end of a holding lever 326 that is pivotably mounted on a shaft 325, and a lower cutout 328 is connected to the other end.
A holding portion 328 is provided in which a portion a and an upper portion 328b are formed into a stepped shape.

Here, in FIGS. 4 and 6, the locking lever 324 is held in the normal, solid line position, and the hook-shaped piece 324a is spaced apart from the teeth 322a. In this state, the spring clutch 321 is in the link mode, and the rotation of the gear 319 is transmitted to the sprocket 329 via the spring clutch 321.
The rotation of 29 is caused by the original paper feed roller pair 13 via a chain 333 that is stretched between this sprocket and other sprockets 330, 331, and 332.
This is transmitted to the roller 13b, which is in a rotating state.

On the other hand, it is adjacent to the output side of the spring clutch 321, that is, the sprocket 329. axis 317
A spring clutch 334 serving as a second clutch for connecting and disconnecting the transmission of rotation to the photosensitive paper feed roller 16 is provided at a location. A recess 334a is provided at one location on the circumferential surface of the sleeve of the spring clutch 334, and as shown in FIG. 6, a shaft 335 is pivotally attached to this recess 334a, and a locking rod 337 with a solenoid 336 connected to one end is attached to the recess 334a. The ends are engaged.

As shown in FIGS. 4 and 5, a sprocket 338 forms the output side of the spring clutch 334.
A timing cam 339 is integrally attached to this, and a roller 341a of a follower lever 341 is engaged with this cam 339. The follower lever 341 is biased to rotate in the direction in which the roller 341a contacts the cam 339 by the elasticity of a spring 354 applied to one arm. A holding rod 343 is screwed to the shaft 342 to which the follower lever 341 is fixed, and the shaft 20a of the presser roller 20 is fitted into a long hole 343a of the holding rod 343 so as to be movable up and down.

A base end of an extension piece 344 is fixed to the lower part of the shaft 342. Further, a tip alignment member 17 and an arm rod 345 with a spring 346 (FIG. 1) hooked to one end are fixed to the upper part of the shaft 18. Of these, the arm rod 34
The other end of the extension piece 344 is in contact with the lower surface of the free end of the extension piece 344 .

The shaft 18, shaft 342, etc. shown in FIG. 4 are rotatably supported by a side plate of the copying machine (not shown).

Here, in FIGS. 4 and 6, the locking lever 324 is held in the flat, solid line position as described above, and the hook-shaped piece 324a is attached to the tooth 322.
It is in a state separated from a. In this state,
The spring clutch 321 is in the link mode, and the rotation of the gear 319 is transmitted to the sprocket 329 through the spring clutch 321.
The rotation of this sprocket 329 is caused by the rotation of the chain 33.
3 to the roller 13b of the pair of original paper feed rollers 13, and the roller 13b is placed in a rotating state.

Then, as shown in FIG.
When the leading edge of the original paper is detected by the original paper detection device 15, the solenoid 336 shown in FIG. 6 is energized for a predetermined period of time based on this detection signal.

Then, the locking rod 337 rotates clockwise around the shaft 335 against the elastic force of the spring 347, and at this time, the tip of the locking rod 337 separates from the sleeve recess 334a in FIG. release the sleeve. This release causes the spring clutch 334 to switch from the disconnection mode to the engagement mode, and as a result, the rotation of the sprocket 329 is transmitted to the sprocket 338, which rotates the chain 348, sprocket 349, gear 350, and gear 351. The paper is transmitted to the photosensitive paper feed roller 16 via the paper feed roller 16.
starts rotating.

That is, the photosensitive paper feed roller 16 starts rotating upon receiving a detection signal from the original paper detection device 15.

In FIG. 7, the roller 341a of the follower lever 341 has fallen into the starting part 339a of the timing cam 339, and in this state, the presser roller 20 is in contact with the feed roller 19, and the tip alignment member 17 is in contact with the merging passage 61. It is held in a released position. That is, in FIG. 4, under the elasticity of the spring 354, the extension piece 344
45 is pushed down against the elasticity of the spring 346 to hold the tip alignment member 17 in the open position.

When the spring clutch 334 in FIG. 4 is in the coupling mode, the timing cam 339, which is in the starting rotation position in FIG. 7, is integrated with the sprocket 338.
When the roller 341a starts rotating in the direction of the arrow, after a predetermined time has elapsed from this starting point, the roller 341a moves toward the bulging edge 339b of the timing cam 339, as shown in FIG.
It starts to ride up.

When the roller 341a rides on the bulging edge 339b, the follower lever 341 is rotated counterclockwise from the position shown in FIG. 7 to the position shown in FIG. 8. Then,
In FIG. 4, the holding rod 343 also rotates in the same direction,
At this time, the lower part of the elongated hole 343a lifts the shaft 20a and moves the presser roller 20, which is riding on the feed roller 19 by its own weight, from the roller 19 to the eighth
Separate as shown. In this state, the original paper and the photosensitive paper are allowed to pass toward both rollers 19 and 20.

On the other hand, when the follower lever 341 rotates counterclockwise, the extension piece 344 also rotates in the same direction. Then, the arm rod 34 that is in contact with this extended piece 344
5 is rotated clockwise by the tension elasticity of the spring 346 in order to retract the free end of the extension piece 344 upward, and this rotation causes the tip alignment member 17 to move through the shaft 18 as shown in FIG. As shown in FIG.

In FIG. 8, after the presser roller 20 is separated from the feed roller 19, the leading edges of the original paper and the photosensitive paper reach a region between the two rollers, pass through this region, and collide with the leading edge alignment member 17. The leading edges of both papers are aligned with each other.

When the timing cam 339 rotates from the position shown in FIG. 8 to the position shown in FIG. ing.

When the timing cam 339 continues to rotate, the roller 341a falls from the intermediate step 339a to the cam step, and then, as shown in FIG.
When the starting part 339a reaches the roller 341a,
The timing cam 339 has rotated once,
In this state, the tip of the locking rod 337 shown in FIG. 6 falls into the sleeve recess 334a shown in FIG. Then, the photosensitive paper feed roller 16 stops. On the other hand, since the spring clutch 321 is still in the engagement mode, the shaft 317, which is integral with the sprocket 329 shown in FIG. 5, continues to rotate. That is, the feed roller 19 continues to rotate.

Returning to the original explanation, the roller 341 in Figure 8
When a falls into the intermediate step 339c of the cam 339, the presser roller 20 comes into contact with the feed roller 19 as shown in FIG. 9, and the roller 341a in FIG.
When the tip aligning member 17 falls into the cam step near a, the tip aligning member 17 exits the merging passage 61, as shown in FIG. This is because the follower lever 3 shown in FIG.
41 is rotated clockwise by the elasticity of the spring 354, and at this time, the arm rod 345 is rotated by the extension piece 344.
This is because it is pushed counterclockwise.

Next, in the state shown in FIG. 7, the original paper and the photosensitive paper are sent into an open merging path 61 between the rotating feed roller 19 and the presser roller 20 that is rotating as a result of the rotating feed roller 19. Proceeds to the exposed area.
When the photosensitive paper is fed together with the original paper by both rollers 19 and 20, the drive to the photosensitive paper feed roller 16 is cut off, and the roller rotates freely.

As described above, the timing cam 339 separates the presser roller 20 from the feed roller 19 to allow the original paper and the photosensitive paper to pass, and advances the leading edge alignment member 17 into the merging path 61 so that the leading edges of both papers advance. After the alignment is performed by the tip alignment member 17, the tip alignment member 17 is retreated from the merging path, and the presser roller 20 is
Achieve the function of bringing it into contact with 9.

According to this embodiment, the movement of the presser roller 20 toward and away from the feed roller 19 and the movement of the leading edge aligning member 17 toward and away from the merging path 61 are performed in a well-timed manner, so that the leading edges of both sheets are completely aligned before exposure. There is no need to worry about image misalignment. In addition, by skillfully combining the two clutches, the rotational drive of the photosensitive paper feed roller 16 and the rotational drive of the feed roller 19 are controlled in a manner that relates these two operations. The mechanical configuration can be greatly simplified compared to a system in which the steps are performed separately.

Here, the light emitting element 2 shown in FIGS. 2 and 3
As already mentioned, the photosensitive paper detection device consisting of 62, the light receiving element 263, the tongue piece 261, etc. detects whether or not the photosensitive paper is fed.
Now, when this detection device detects a non-feeding of photosensitive paper, this detection signal is sent to the solenoid 3 in Figure 6.
27 is energized.

Then, the holding lever 326 rotates counterclockwise around the shaft 325 against the tension force of the spring 352 to the imaginary line position. This rotation causes the holding part 3
28 retreats downward, the locking lever 324, whose rotation has been restricted until now by its lower step 328a, rotates clockwise around the shaft 323 under the elasticity of the spring 353. , the hook-shaped piece 324a of the lever 324 abuts against the circumferential surface of the sleeve 322 of the spring clutch 321. On the other hand, the lower end of the locking lever 324 is connected to the upper part 32 of the holding part 328.
8b.

After the hook-shaped piece 324a abuts against the circumferential surface of the sleeve 322, one of the teeth 322a of the sleeve becomes hooked on the hook-shaped piece 324a, and the sleeve 3
22 is locked. Then, the spring clutch 321 switches from the connection mode to the disconnection mode, the rotation transmission from the gear 319 to the sprocket 329 is cut off, and the original paper feed roller pair 1
3 and the feed roller 19 stop rotating. At the same time, the rotation of the sprocket 329 stops, so
The photosensitive paper feed roller 16 stops.

In this way, when the photosensitive paper is not fed, the original paper feed roller pair 13 and the feed roller 19 are stopped, so the original paper is not fed alone to the exposure section, and the original paper is There is no risk of damage.

The upper end of the locking lever 324 in FIG.
4b is provided, and after removing the cause of the defect in the photosensitive paper feed section, pinch the dirt 324b with your fingers and rotate the locking lever 324 around the shaft 323 from the imaginary line to the solid line position. , the lower end of the lever 324 retreats to the right, so the holding lever 326, which has been at the imaginary line position, rotates back to the solid line position due to the elasticity of the spring 352, and the lower end of the locking lever 324 engages with the lower step portion 328a.

As described above, the holding lever 326 locks the locking lever 324 in the imaginary line position, and in this locked state, the spring clutch 32
1 maintains the cutting mode, and the pair of original paper feeding rollers 13 and the like continue to stop. and,
During this stop period, the cause of the defect in the photosensitive paper feeding section can be removed. Note that even if the power to the copying machine is turned off and the solenoid 327 is de-energized, the spring clutch 321
The maintenance of the disconnection mode is reliably guaranteed. In addition,
The solenoid 327 may be one that is deenergized immediately after the holding lever 326 is rotated to the imaginary line position.

Here, as mentioned earlier, the tip of the locking rod 337 shown in FIG. 6 falls into the sleeve recess 334a shown in FIG.
It rotates and stops, and the roller 341a is the starting part 339a.
placed in

However, if the photosensitive paper detection device shown in FIGS. 2 and 3 detects a non-feeding of photosensitive paper, the timing cam 339 shown in FIG. With the detection signal, the sixth
If the solenoid 327 shown in the figure is energized, the timing cam 339 will stop at a position halfway through one rotation.

If the timing cam 339 stops at a halfway position, it will disturb the subsequent timing operation by the timing cam.Also, it is necessary to remove the cause of the defect in the photosensitive paper feeding section and reset the photosensitive paper. After that, when the copying machine is reset and started to drive, the tip of the locking rod 337, which is stopped in front of the sleeve recess 334a, will be inserted into the recess 334a.
Since the photosensitive paper feed roller 16 rotates until it drops to the position 34a, the photosensitive paper that has been painstakingly reset is fed to a halfway position.

In the embodiment device according to this invention, when the aforementioned photosensitive paper detecting device detects the non-feeding of photosensitive paper, the tip of the locking rod 337 is inserted into the sleeve recess 334a.
The solenoid 327 shown in FIG. 6 is energized by the paper unfeeding detection signal from the detection device at the same time as the paper drop. By doing this, when a paper misfeed is detected, the spring clutch 321 switches to the cutting mode, and the locking rod 337 always falls into the sleeve recess 334a, so that the drive cannot be started after resetting the copying machine. Even if the photosensitive paper feed roller 16 is rotated unnecessarily, there is no risk that the photosensitive paper that has been reset will be fed halfway.

In this way, in the device of the present invention, when the photosensitive paper is not fed, the spring clutch 321 as the first clutch goes into the disconnection mode when the timing cam 339 rotates back to the initial rotation position based on this detection signal. Since the switching is possible, there is no risk that the reset photosensitive paper will be fed unnecessarily, and there is no risk of disrupting the timing operation by the timing cam after being reset.

Although the embodiments described above use a spring clutch as the clutch, it is also possible to use an electromagnetic clutch instead.

(Effects) As described above, in the present invention, when the photosensitive paper that should be merged with the original paper is not fed, the photosensitive paper feed unit is automatically fed at the next drive start after removing the defective factor in the photosensitive paper feeding section. Since the rollers are prevented from rotating unnecessarily, there is no fear that the photosensitive paper that has been reset in the photosensitive paper feeding section will be fed halfway. Furthermore, there is no fear of disrupting the timing operation by the timing cam after the start of the drive, and alignment of the leading edges of the original paper and the photosensitive paper can be performed without any trouble.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a diazo copying machine to which an embodiment of the present invention is applied, Figure 2 is a configuration diagram around the photosensitive paper detection mechanism, and Figure 3 is a view of Figure 2 from the direction of arrow A-A. 4 is a perspective view showing the main parts of the device of the above embodiment, FIG. 5 is a sectional side view of the spring clutch mechanism of the device of the embodiment, and FIG. 6 is a sectional side view of the spring clutch mechanism of the device of the embodiment. Fig. 7 is a diagram showing a state in which the timing cam in the same embodiment device is held at the initial rotation position, and Fig. 8 is a diagram from Fig. 7 showing a state in which the roller of the follower lever rides on the bulging edge of the timing cam. The action diagram, FIG. 9, is the action diagram from FIG. 8 showing the state in which the roller has fallen into the intermediate step of the timing cam. 12...Original paper insertion slot, 13...Original paper feeding roller pair, 15...Original paper detection device, 16...
...Photosensitive paper feed roller, 17...Tip alignment member,
19...Feed roller, 20...Press roller,
61... Merging passageway, 261... Tongue piece, 262...
Light emitting element, 263... Light receiving element, 321... First
Clutch, 334...Second clutch, 339
...timing cam.

Claims (1)

[Scope of Claim for Utility Model Registration] The original paper inserted from the original paper insertion slot of the copier main body is fed into the machine by a pair of original paper feed rollers, and the photosensitive paper in the photosensitive paper storage section is fed into the machine by the photosensitive paper feed roller. After passing both sheets of paper between a feed roller and a presser roller that can move toward and away from the feed roller, the leading edges of both sheets of paper are brought into contact with a leading edge aligning member that can move back and forth in the conveyance path of both sheets of paper to align them. In the copying machine, a first clutch is provided on the axis of the feed roller, connects and disconnects rotation transmission from the drive source to the pair of original paper feed rollers and the feed roller, and is permanently maintained in a connected mode; connected to the output side of the first clutch;
a second clutch that connects and connects rotation transmission from the clutch to the photosensitive paper feed roller, and when the first clutch is in the connection mode and the original paper is fed into the machine by the pair of original paper feed rollers. , an original drawing paper detection device that detects the leading edge of the original drawing paper and switches the second clutch from the disconnection mode to the connected mode based on the detection signal; During one rotation from the initial rotation position together with the output side of the clutch, the presser roller is separated from the feed roller to allow both sheets to pass, and the leading edge alignment member is advanced into the conveying path, so that the leading edges of both sheets are After being aligned by the advancing leading edge aligning member, a timing cam is used to retract the leading edge aligning member from the conveyance path and bring the separated presser roller into contact with the feed roller, and the photosensitive paper is removed from the photosensitive paper feed roller. The photosensitive paper detects whether or not the paper is fed to the conveyance path, and when the paper is not fed, the timing cam switches to the cutting mode when the timing cam rotates back to the initial rotation position based on this detection signal. A paper conveyance drive control device in a diazo copying machine equipped with a detection device.