JPH01104544A - Handling device for jam of sheet conveying passage - Google Patents

Abstract

PURPOSE:To ensure the handling of a jammed sheet by reversely driving the reversible conveying means of a first conveying passage by a control means at the time of detecting that a second conveying passage is opened for handling jam by means of a sensor. CONSTITUTION:If a sheet detecting switch 126 fails to detect a sheet 12 for above a certain time after confirming the feed of sheet of paper by means of any of sheet detecting switches 123-125, a control means judges to be the occurrence of jam and stops the conveyance. As a second conveying passage 64 is opened for handling the jam, driven rollers 55b-57b and 61-63 are interlockedly separated from driving rollers 55a-57a, opening also first conveying passages 58-60. When this is detected by a sensor 105, pairs of handling rollers 44, 48, 54 are reversed to backwardly feed the jammed sheet of paper to paper feeding units 31-33. Thereby, the jammed sheet of paper can be easily taken out of a paper feeding part.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is useful for preventing jams in sheet conveyance paths used when sheets are provided for image formation in image forming apparatuses such as copying machines and laser beam printers. It relates to a processing device.

(Prior Art) This type of sheet conveyance path has become complicated due to the recent trend of selectively using various paper feed sections to feed paper to the image forming section, making it easy for jams to occur and for jams to occur. It's becoming difficult to process.

For example, in the copying machine shown in FIG. 12, in order to feed a sheet C to an image forming section B centered on a photoreceptor drum A, there are paper feeding sections E, E, which feed sheets 1-C of different sizes, and In order to form images on both the front and back sides, sheets C on which images have been formed on the front side are temporarily stored, and re-feeding units F for later forming images on the back side are arranged above and below. There is. Then, the sheets C fed from each of these paper feed sections E and F are fed into one longitudinal sheet conveyance path G, and this sheet Hff
The sheet C is fed to the image forming section B via the i-feeding path G to be used for image formation.

In this case, the horizontal sheet feeding paths H, 1, , J from the sheet feeding sections E, F to the sheet conveying path G are connected to the vertical sheet conveying path G in an almost perpendicular direction, and Sheet C tends to jam at the joints.

Therefore, the positional conditions for the longitudinal sheet conveyance path G make it possible to open the conveyance path together with the conveyance means as disclosed in Japanese Patent Publication No. 60-223750.

(Problem to be solved by the invention) However, when a jam occurs, the sheet conveyance path G
Even when opened, the sheet C is in the horizontal sheet feeding path ■1,
■, each transport means installed in J, i, j
Since the leading end of the sheet C is exposed to the open sheet conveying path G, even if it is to be pulled out, it can only be pulled out with the rotation of the conveying means K, L, and M, making it difficult to clear the jam.

Further, the sheet C is transferred to each sheet conveyance path H as shown in FIG.
, I, J to enter the sheet transport path G, the sheet enters the opposite side of the paper passing side with respect to the paper passing guide K provided at both connecting parts, and jams without entering the sheet transport path G. Sometimes I end up doing it. In this case, even if the sheet conveyance path G is opened, the jam cannot be cleared. Therefore, the paper feed section D1E, F
The paper feed section is opened by pulling out the paper feed cassette etc. attached to it, and the paper feed section is pulled out back to the E and F side. Hateful.

In order to solve these problems, the conveyance means is driven in reverse by detecting a jam, and the conveyance means takes the jammed sheet c sandwiched between L and M from the paper feed section and automatically transfers it to sections E and F. It is also possible to return the paper to the target to make it easier to dispose of jams.

However, if the jammed sheet c is simply returned automatically in this way, it is often impossible to check the return conveyance status of the jammed sheet c when the sheet conveyance path G is opened, so the jam detection may be incorrect. It was determined that the
The image forming operation is restarted with the jammed sheet c returned to the paper feed sections L], 2, and J left as is, causing a more complicated jam than before.

(Means for solving the problems) In order to solve the above-mentioned problems all at once, the present invention has the following features:
A sheet conveyance path in which a first sheet conveyance path from a paper feed section is connected to a second sheet by conveyance path that can be opened and closed for jam clearance, etc., and the sheet conveyance means of the first sheet conveyance path can be rotated in forward and reverse directions. A switchable reversible sheet conveyance means, characterized by comprising a sensor for detecting an open state of the second sheet conveyance path, and a control means for turning the reversible sheet conveyance means into a reverse state based on a detection signal from the sensor. It is.

(Function) If a sheet jams while being fed from the first sheet conveyance path to the second sheet conveyance path, the sensor detects it by opening the second sheet conveyance path to clear the jam. Therefore, the control means drives the reversible conveyance means disposed in the first sheet conveyance path in the reverse direction.

As a result, even if the first sheet conveyance path cannot be opened together with the conveyance means due to its positional conditions, the sheet jammed in the reversible conveyance means of the first sheet conveyance path can be removed by the reversible conveyance means. The reverse drive allows the paper to be fed back to the original feeding section to make it easier to take out.The automatic reverse processing state is confirmed through the second sear 1-R feed path opened by the user's own operation, and the jam is detected correctly. It can also be confirmed that automatic processing has been performed, and it is ensured that the jammed sheet returned to the paper feeding unit is processed before restarting the paper feeding operation.

In addition, jammed sheets that have come off the reversible conveyance means of the first sheet conveyance path and entered the second sheet conveyance path can be pulled out as is and cleared in the easiest way because the second sheet conveyance path is opened as described above. You can immediately restart paper feeding.

(Example) A first example of the present invention shown in FIGS. 1 to 3 will be described.

This embodiment shows the case of a copying machine capable of double-sided copying and image composition, and as shown in FIG. , an electrostatic charger 4, a developing device 5, a transfer/separation charger 6.7, and a cleaning device 8.

The image forming section 11 includes a photoconductor drum 2 which is uniformly charged by a charger 4 after being neutralized by a main eraser lamp 3.
A mirror scan type exposure optical system 9 provided above the photoreceptor drum 2 exposes the image of the document placed on the document platen glass 10 on the top surface of the main body 1 to slit light onto the surface of the photoconductor drum 2. An electrostatic latent image is formed on the surface of the photoreceptor drum 2. This electrostatic latent image is developed with toner by the developing device 5 to become a visible image, reaches the transfer charger 6, and is transferred onto the transferred transfer sheet 12.

After the transfer, residual toner is removed from the surface of the photosensitive drum 2 by a cleaning device 8, and then residual charge is removed by a main eraser lamp 3 and charged by a charger 4, and the surface is subjected to the next exposure again.

On the other hand, the sheet 12 after the transfer is sent to a fixing device 22 by a suction type conveyance belt 21, where the transferred copy image is fixed. The paper is discharged to the paper discharge tray 25.

Below the image forming section 8, there is a paper refeeding unit 31 that receives the sheet 12 on which a copy image has been formed on the negative side and refeed it for double-sided copying or image composition, and a sheet refeeding unit 31 that receives the sheet 12 on which a copy image has been formed on the negative side. An upper paper feeding unit 32 and a lower paper feeding unit 33 feed the sheet 12 so as to form a copy image on the first side.
are arranged in multiple stages.

The paper refeeding unit 31 has a slide rail 15 for zero to one.
It has a tray 34 for receiving the sheet 12, and a first sheet return path 35 branched from the sheet ejection path 30 between the conveyance roller 23 and the sheet ejection roller 24. Sheet 12 with an image formed on its surface
with the front and back sides reversed, or from the first sheet return path 35 to the second sheet return path 36.
The sheets 12 with images formed on their surfaces are sequentially fed without being turned over, and the fed sheets 12 are sequentially stored in a stacked state on a tray 34.

A paper feed roller 41 is installed at the upper part of the sheet feeding side of the tray 34.
is supported by an arm 43 that can move up and down about a shaft 42, and when the sheet 12 is being fed onto the tray 34, it is retracted upward and does not interfere with the feeding of the sheet 12. When the operation is completed, it comes into moderate pressure contact with the sheet 12 stored in the tray 34, and is rotated to feed the sheet 12 on the tray 34 one by one through the pair of separating rollers 44. ing.

Whether to eject the sheet 12 as it is after the image is formed on the first side, or
The selection of whether to refeed the paper via the refeeding unit 31 is made by switching the path using a path switching claw 37 provided at the part where the first sheet return path 35 branches from the paper ejection path 30. The selection of whether or not to turn the sheet 12 upside down when feeding it onto the tray 34 is made by switching the path using a path switching claw 38 provided at the connection between the first sheet return path 35 and the second sheet return path 37. Let's do it.

The upper paper feed unit 32 is attached to the guide rail 16 with respect to the main body l.
12)
The sheet cassette 45 is equipped with a tray 45 that can accommodate an appropriate number of sheets.The sheet cassette 45 is pushed up by a push-up plate 46 to bring it into proper pressure contact with the paper feed roller 47, and when the paper feed roller 47 is driven to rotate. The inner sheets 12 are fed one by one through a pair of sorting rollers 48.

The lower paper feeding unit 33 is attached to the guide rail 17 with respect to the main body 1.
It has a stocker 51 that can accommodate a large amount of sheets 12 of different sizes from the upper sheet feeding unit 32, and a large amount of sheets 12 is received on an elevating table 52 in the stocker 51. Then, the receiving sheet 12 is brought into proper pressure contact with the paper feed roller 53 by the upward movement of the elevating table 52, and the sheet 12 on the elevating table 52 is sent out one by one by rotationally driving the paper feed roller 53. Paper is fed via a pair of separating rollers 54.

Behind each pair of separating rollers 44.48.54 there is a pair of transport rollers 55.56.57, which feed a substantially horizontal first sheet l feed path 5 from each paper feed unit 31.32.33.
It is located at the end of 8.59.60.

Each of the first sheet transport paths 58, 59, 60 includes a main drive roller 55a of each transport roller pair 55, 56, 57,
The rollers 56a and 57a are connected in a substantially perpendicular direction to each part of the second sheet conveyance path 64 in the vertical direction, which has driven rollers 61, 62, and 63 pressed against each other from the sides.

The second sheet l-transport path 64 is connected to each paper feed unit 31, 32.
The sheet 12 fed from 33 is conveyed upward to the third sheet conveyance path 7 having a timing roller pair 71.
2, the feeding timing is adjusted by the timing roller pair 71, and the paper is fed to the transfer section in synchronization with the image on the photosensitive drum 2.

At this time, the second and third sheet conveyance paths 64, 72 are configured to reverse the sheets [2] fed from the respective paper feed units 31, 32, 33 and send them to the transfer section. Therefore, the sheet 12 stored in the paper refeeding unit 31 with the image-formed surface facing upward is reversed so that the front surface is facing downward, and then subjected to transfer. This results in double-sided copying in which an image is formed on the back side on which no image has been formed yet. In addition, the sheet 12 stored in the refeeding unit 31 with the image-formed surface facing downward is reversed so that the front surface is facing upward, and is then subjected to transfer. This is a copy of the image composition that forms the image.

A manual sheet conveying path 74 from a manual feeding table 73 is connected to an intermediate position of the third sheet S feeding path 72 before the timing roller pair 71, and manual sheet feeding is also possible.

The second sheet conveyance path 64 has its driven rollers 61, 62, 6
3 are mounted on a frame 82 connected by a hinge 81 to a side plate 84 on the inner side of the main body 1 where the first sheet conveyance path 58, 59, 60 is equipped, and a conveyance path one side unit that can be opened and closed;・It forms 80.

By rotating this conveyance path one side unit 80 around the hinge 81, the 2111th conveyance path 64 is opened and closed as shown by the imaginary line and solid line in FIG.
5a, 61.56a, 62.57a and 63 are separated from each other.

As a result, if the sheet 12 is jammed in the second sheet conveyance path 64, the jam state can be confirmed and the jammed sheet 12 can be taken out by opening the second sheet conveyance path 64. For this purpose, the side plate 91 of the main body 1 can be opened and closed.

Lower roller 55b of conveyance roller pair 55.56.57,
56b and 57b are driven rollers, which are the main driving roller 55a.
, 56a, and 57a. For this pressure contact, lower driven rollers 55b, 56b, 57
At the end on the odor side of the main body, the main drive rollers 55a, 56a, and 57a are bearing at a fixed position on the side plate 84 together with one end of the main drive rollers 55a, 56a, and 57a to obtain an appropriate pressure contact state, and at the other end, the main drive roller 55
a, 56a, 57a are bearing in position on the side +rx84, while the lower driven rollers 55b, 56b
.

57b is supported by a bearing 87 movably held by a long hole 90 in the side plate 84, and is biased by a spring 83 fixed at both ends to the side plate 84 as shown in FIGS. A good pressure contact condition is obtained.

The bearing 87 faces the free end of the transport path one-side unit 80 , and has its tail end pivoted on the side plate 84 by a shaft 85 .
The lever 86, which is biased by a spring 89 applied between the spring seat 88 on the upper part of the lever 86, is applied to the bearing 87, and the lower driven rollers 55b, 56b, 57b are moved against the spring 83, and the lower driven rollers 55b, 56b, 57b are moved away from the main driving rollers 55a, 56a, 57a. I am trying to make it possible to press Xtt. Therefore, spring 89 should be much stronger than spring 83.

Further, the driven rollers 61, 62 of the conveyance path side unit 80.
Reference numeral 63 is designed to come into pressure contact with the main drive rollers 55a, 56a, and 57a when the conveyance path side unit 80 is closed. For this pressure contact, the rear end of the main body l is supported by a bearing in a fixed position on the frame 82 to obtain a proper pressure contact state, and the other end is supported movably by a long hole 102 in the frame 82. 103, and is biased by a spring 101 whose both ends are fixed to the frame plate 82 as shown in FIGS. 3 to 5 to obtain an appropriate pressure-contact state.

A push pin 104 is erected on the outer surface of the free end side of the frame 82 and faces the bent end portion 86a of the lever 86. This push pin 104 slides under the bent end portion 86a of the lever 86 when the conveyance path one-side unit 80 is closed, and pushes it upward, and the lever 8G is moved by the spring 89.
The lower driven rollers 55b, 56b, and 57b are pulled up from the position of action against the lower driven rollers 55b, 56b, and 57b. As a result, the lower driven rollers 55b, 56b, and 57b are released from the downward bias by the lever 86, and are brought into pressure contact with the main drive rollers 55a, 56a, and 57a by the bias of the spring 83.

Due to the configuration of the first sheet conveyance path 58, 59, 60 and the second sheet conveyance path 64, as long as the conveyance path side unit 80 is opened for jam removal etc., the second sheet conveyance path
4 are conveyance rollers 61, 55a, 62 which are conveyance means.
56a, 63, and 57a, and the pressure contact state of the pair of conveyance rollers 55.5G and 57 of the second sheet conveyance path 58, 59, and 60 is also released accordingly. Therefore, not only the seam 2 which has reached the second sheet transport path 64 in its entirety, but also a portion of the seam 2 which is located on the transport roller pair 55.5G and 57 of the first sheet transport path 64, will be smooth without any resistance. It can be extracted and processed for jamming. On the other hand, as long as the conveyance path side unit 80 is closed, the first and second sheet conveyance paths 58, 59, 60, and 64 can return to their normal conveyance states.

On the other hand, the jam sheet 12 is separated by a pair of rollers 44.48.5.
If the jammed sheet 12 is located on the paper feed unit 31, 32, 33 side from the fourth section, even if the jammed sheet 12 has come out into the open second sheet conveyance path 64, it will take a pair of sorting rollers 44, 48, 54 or a paper feed roller to pull it out. 41, 47, 53, etc., so it will not go smoothly. Therefore, when the transport and sorting roller one side unit 80 is opened for jam removal etc., it is detected by the sensor 105, and the sorting roller pair 44, 48, 54 is opened.
The jammed sheet 12 is automatically reversed and the jammed sheet 12 is removed from the pair of separation rollers 44, 48, 54 to the paper feed unit 31, 32.
．． 33 side, it is automatically transferred to the paper feed unit 31.
32. Please return it to 33rd part. This return operation state can be visually confirmed from the opened second sheet conveyance path 64.

In the case of automatic return of the sheet 12, the sheet 12 is
2 and 56a and 63 and 57a, they are open and do not interfere, and the jammed eyes 2 are smoothly returned to the paper feed unit 31, 32, and 33.

This returned sheet can be taken out and processed by being pulled out from the main body 1 without being completely returned onto the proper sheet 12 by the paper feed unit 31, 32, 33. If it is desired to return the returned sheet 12 onto the proper sheet 12, it is desirable to reverse the paper feed roller 41, 47, 53 together with the separating roller pair 44, 48, 54. In addition, the conveyor roller pair 55
．． 5G and 57 are the second sheet conveyance path 6 of the jammed sheet 12
If the automatic return to the paper feed unit 1-31, 32, and 33 section is not to be obstructed, it is sufficient to simply allow the rotation to be free instead of the operation of releasing the pressure contact. In short, it suffices to be free with respect to the sheet 12. Also, instead of these, a pair of conveyor rollers 55, 56, 57
It is also useful to reverse the separation roller pair 44.4B, 54 as well. In this case, if even a small amount of the jammed sheet 12 is in the first sheet conveyance path 58, 59, 60, it will be automatically returned to the sheet feeding unit 3L 32, 33.

In order to simplify jam handling, a jam display section 127 as shown in FIG. 7 is provided on the operation panel (not shown) of the main body 1. The jam display section 127 is provided with jam position display LEDs 128 to 132 at locations corresponding to portions that are likely to jam in the schematic diagram of the main body 1. They indicate that there is a jam by lighting up, and the position of the jam is indicated by the lighting position. For example, LED
128 to 130 indicate a jam in the paper feed unit 31, 32, 33, LHD 131 indicates a jam in the first and second sheet conveyance paths 58, 59, 60, 64, LED 1
32 displays jams near the image forming section 8 and in the fixing device 22, respectively.

To display the jam display, the sheet 1 that is jammed in the first and second sheet conveyance paths 58, 59, 60, 64 as described above is displayed.
2 to the paper feed unit 31, 32, and 33 automatically, when the sheet 1-12 is returned, the jam position display LED 131 lights up when the sheet 12 is returned to the paper feed unit 31, 32, and 33 automatically. .32.33 Other Nishita Jam Position Table LHD 12B, one of 129 and 130 should be lit. This makes it possible to display that the sheet 12 has been returned and which of the paper feed units 31, 32, and 33 should be pulled out for processing.

An automatic document feeder 111 is installed on the top surface of the main body l.
A large number of originals placed on a document table 112 are automatically fed one after another onto the document table glass 10 for copying, and are sequentially discharged to a document discharge tray 113. For this purpose, the control system between the body 1 of the copying machine and the automatic document feeder 111 is designed to be able to send and receive various signals.

For the sake of simplicity in this section, we will only discuss the control means on the body 1 side of the copying machine, focusing on the points related to the present invention.As shown in FIG. 8, the control means is a microcomputer (hereinafter referred to as microcomputer). 121 is used.

The microcomputer 121 constitutes a matrix using a decoder 120, and includes various input switch groups 122, an open detection sensor 105 of the unit 80 on one side of the transport path, and sheet detection switches 123 to 123 for detecting a jam provided in each sheet feeding path.
126. In addition to receiving inputs such as 141 to 143, the seventh
Jam position display LE0 in the jam display section 127 shown in the figure
Displays on various display units such as 128 to 132 are controlled. The microcomputer 121 also controls the paper refeeding unit 31.
, each sorting roller pair 4 on the first sea 1 feed path 58, 59, 60 from the upper sheet feeding unit 32 and the lower sheet feeding unit 33.
Output line 13 that rotates 4.48.54 forward and reverse
3a to 135a and 133b to 135b are also connected. 137138, other input lines and output lines connected to the microcontroller 121 are shown.

The jam processing control will be mainly described below based on the flowcharts shown in FIGS. 9 and 10.

FIG. 9 shows a schematic flowchart of the main routine of the microcomputer 121.

When the microcomputer 121 is reset and the program is started, the RAM is cleared, various register settings are initialized, and initial settings are made to put the device into the initial mode (step #100).

Next, step #200 starts an internal timer that is built into the microcomputer 121 and whose value has been set in advance as an initial setting, and then steps #300, #4QO, and #5 of each subroutine shown in the flowchart.
00, #600, and #700 in sequence, and when all subroutine processing is completed, wait for the end of the internal timer that was set first (step #800) 1
End the routine. The time length of this one routine is used to count the various timers that appear in the subroutine. (The various timer values determine the end of the timer based on how many times this l routine has been counted.) Figure 10 shows step #60 in the main routine of Figure 9.
12 shows a schematic flowchart of the conveyance path jam processing subroutine at 0.

In the jam detection subroutine of step #500 in the main routine of FIG. 9, various jam detections and common processing when a jam occurs are performed. This is the first sheet conveyance path 58.59
．． Sheet detection switch 123.124.1 at 60
25 is turned on and paper feeding is confirmed, the next sheet detection switch 126 detects that the sheet 12 is not detected for a certain period of time, so it is determined whether there is a jam or not and the location of the jam. Performs necessary processing such as stopping sheet conveyance.

Therefore, in the conveyance section jam processing subroutine, it is determined in step #610 that the jam is a conveyance section jam.
It enters the processing operation only when the jam position is displayed LH
Turn on D131 and turn on sheet detection switches 123 and 124.
．． 125 is in the on state that detected the sheet 12 (step #620).

Here, the case where the jam processing is paper feeding from the upper paper feeding unit 32 will be explained below. Next, the state of the conveyance path side unit 80 is checked on the condition that the sheet detection switch 124 is turned on (step # 630). This is because if the opening detection sensor 105 of the conveyance path side unit 80 is on, it is determined that the conveyance path side unit 80 is closed, and no further processing is performed and the sensor 105 is turned off. That is, when it is determined that the transport path one side unit 80 is opened, the pair of separating rollers 48 is reversed (step #640). When the transport path one side unit 80 is opened, the transport rollers 61 and 55a, 62 and 56a
, 63 and 57a, and a pair of conveyor rollers 55.56.5
7 is released, and the separating roller pair 48 is further reversed, so that the jammed seam 2 is transferred to the upper sheet feeding unit 3.
You can easily return to 2. After that, sheet detection switch 1
When sheet 12 returns until 24 is turned off, step #65
0, and check the setting status of the handling roller vs. reversal timer. Initially, the timer is not set, so the process proceeds to step #680 and sets the timer (step #690). This timer value is determined after the sheet 12 turns off the sheet detection switch 124 and when the separating roller pair 4
It would be good if you had enough time to pass 8. Once the timer is set, the steps from step #650 to step #
The program proceeds to step 660 to check whether the timer has expired (step #660), and when the timer has expired, the program proceeds to step #670 to stop the reverse rotation of the pair of sorting rollers 48 and display the conveyance section jam position L[! Turn off 0131,
The upper stage sheet feeding unit jam position display LED 129 is turned on and the process ends.

Note that in the case of paper feeding from other paper feeding units 31 and 33, the same jam processing as described above is performed.

FIG. 11 shows a modification of the above-mentioned embodiment, in which a push pin 10 is attached to the lower surface of the bent end portion 86a of the lever 86 for releasing the pressure contact of the driven rollers 55b, 56b, 57b.
4, and when the transport path one side unit 80 is closed, the push bottle 1 is attached to this engaging portion 86b.
04 are elastically engaged, and the driven rollers 61, 62, and 63 are connected to the driving roller 5 by the spring 101.
5a, 56a, and 57a to be elastically locked in the closed state.

This eliminates the need for special locking means to keep the conveyance path side unit 80 in the closed state.

(Effects of the Invention) Since the present invention has the above configuration and operation, the second! Even if a jam occurs while conveying the sheet to the I conveyance path, the sheet that has come out to the second conveyance path will be transferred to the second conveyance path! It can be processed at the same time as opening the I channel.

See you in 1ii! Even if the sheet hanging on the reversible conveyance means of the conveyance path is in a condition where the first conveyance path cannot be opened, the sheet can be transferred to the first conveyance path on the condition that the 26th conveyance path is opened for jam removal. Since the reversible conveyance means is reversed, the paper can be automatically reversed to the paper feed section so that it can be easily taken out from the paper feed section, and this automatic processing can be confirmed from the opened second conveyance path. It is possible to eliminate the inconvenience in which the jammed sheet is returned to the paper feed section without being able to confirm this, and it is mistakenly assumed that the jam has been detected in error.

[Brief explanation of the drawing]

FIG. 1 is a side view of the internal structure of a copying machine showing one embodiment of the present invention, FIG. 2 is a cross-sectional view of a longitudinal sheet conveyance path, and FIG.
The figure is a perspective view of the opening/closing side portion of the sheet conveyance path shown in FIG. 2, FIGS. 7 is a plan view of the jam display section, FIG. 8 is a block wiring diagram of the control circuit, FIG. 9 is a flowchart of the main routine of the control circuit, and FIG. A flowchart of the subroutine, FIG. 11 is a partial side view of a modified example, and FIG. 12 is Sheet II of a copying machine showing a conventional example.
FIG. 13 is a side view showing a part of the I-feeding section. FIG. 13 is a side view showing an example of a jammed state of a sheet trying to enter the vertical sheet conveying path from the horizontal sheet-1 feeding path. 12------1.
48.54----Pair of single-handling rollers (circuit conveyance means) 58.59.60----First sheet conveyance path 6
4-11～-------------・-・-・−・−・・Second
Sheet conveyance path 80・---m---・−・−・・・・
・・−Ua Feed 1 One side unit (sheet conveyance path opening/closing part) 105・・−−−−・−・・・−・−Conveyance path one side unit (opening detection switch)

Claims (3)

[Claims] (1) A sheet conveyance path in which a first sheet conveyance path from a paper feed section is connected to a second sheet conveyance path that can be opened and closed for jam clearance, etc., and the sheet conveyance means of the first sheet conveyance path is adjusted. The reversible sheet conveyance means is capable of being reverse-switched, and is characterized by comprising a sensor for detecting an open state of the second sheet conveyance path, and a control means for turning the reversible sheet conveyance means into a reverse state based on a detection signal from the sensor. Jam removal device for sheet conveyance path. (2) A jam removal device for a sheet conveyance path according to claim 1, wherein the second sheet conveyance path has a conveyance direction different from that of the first sheet conveyance path. (3) The sheet conveyance path according to claim 2, wherein the second sheet conveyance path is provided in a substantially vertical direction, and the plurality of substantially horizontal first sheet conveyance paths are connected at different portions. jam handling equipment.