JPH0597279A - Jammed sheet processing device - Google Patents

Abstract

PURPOSE:To process a jammed sheet rapidly without hesitation. CONSTITUTION:In an area which includes a pair of carrier rollers 111 and a pair of register rollers 112, one jammed sheet processing area A is set, and in an area which includes the pair of register rollers 112 and a pair of fixing rollers 116, the other jammed sheet processing area B is set. If jamming occurs in the area A, a jammed sheet in any condition is delivered within the area by rotating both of processing means 121 and 122 in the carrying direction without hesitation. If jamming occurs in the area B, a jammed sheet is delivered within the area in the same way as the above by rotating both of processing means 122 and 123 in the counter carrying direction, thus removing the jammed sheet properly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jam processing device in a device such as a copying machine, a facsimile, a printer or the like, which has a sheet conveying path by rollers.

[0002]

2. Description of the Related Art Generally, in a copying machine or the like, a sheet fed from a sheet feeding section is conveyed to an image forming section by a registration roller. In this image forming section, an image is formed while conveying the sheet, and then the sheet is Further, it is configured to be discharged to a discharge tray by a discharge roller or the like. Therefore, the sheet conveyance path, in which a large number of rollers having various functions for conveying and conveying are sequentially arranged, is the base of an important configuration. Here, each roller is set so as to ensure the normal conveyance of the sheet by the conveying force, the pressure contact force, the friction coefficient, etc. However, the sheet is jammed due to the change of the sheet quality, the use environment, the secular change, etc. May occur. When this jam occurs, it is necessary to quickly remove the jammed paper, and for this reason, the roller is equipped with a manually operated jam clearance device.

Conventionally, the above-mentioned jam handling device is constructed so that a roller which can be rotated when a jam occurs is provided with a knob so that the roller can be rotated in either the left or right direction. There is also a configuration in which a one-way clutch is interposed so that it can rotate only in one direction.

[0004]

However, in the former case of the above-mentioned prior art, since the roller can be rotated in either direction, it may rotate in the wrong direction when processing jammed paper. ， This makes it difficult to process.
Further, in the latter case, since the rotation direction of the roller is fixed, even if it is desired that the rollers related to the two jam areas rotate in different directions in the jam processing of each area, I can't do that. Furthermore, when there are a plurality of rollers in the jam processing area, it is difficult to know which one should be rotated.

The present invention has been made in view of this point, and an object thereof is to quickly process jammed paper without getting lost.

[0006]

In order to achieve the above-mentioned object, the present invention is a device in which a plurality of roller pairs each having a transport function and various functions are arranged in a sheet transport path, and one or more jams are provided. The processing area is set by at least two roller pairs, and the processing means is provided for each roller pair in the jam processing area so that jammed paper in any state can be sent into the area by rotating in the same direction. ..

[0007]

According to the above configuration, in the jam processing area set to include two roller pairs in the sheet conveying path, the sheet may jam to one or both of the two roller pairs. It suffices if the processing means is rotated in the same direction with respect to the paper without hesitation, whereby jammed paper in any state can be fed into the area and appropriately removed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, as an apparatus to which the present invention is applied,
For example, a paper conveyance path of a copying machine will be described. The apparatus main body 100 has a plurality of sheets S as a sheet feeding unit 101 at the bottom.
A cassette 102 for stacking and storing sheets S is set, a sheet feeding roller 103 is installed at an upper end portion of the sheet S, and the sheet S is fed one by one from the topmost sheet by the rotation of the sheet feeding roller 103. It is like this. And this paper feed unit 1
From 01 to the paper discharge unit 105 via the image forming unit 104, a transport path 106 for the paper S is continuously provided.

In the transport path 106, first, the sheet S from the sheet feeding section 101 is guided by the guide plate 110 and is transported by the transport roller pair 111 to the registration roller pair 112. The pair of registration rollers 112 is stopped at the time of conveyance of the paper S and the skew is corrected by colliding the leading end of the paper S, and thereafter the rotation is started at a predetermined timing synchronized with the image forming unit 104, and the paper S of the image forming unit 104 is rotated. The sheet is conveyed to the photosensitive drum 113 and the transfer separation charger 114 in the transfer section. The photosensitive drum 113 transfers the image onto the paper S while conveying the paper S by its rotation, and conveys the paper S separated after the transfer to the fixing roller pair 116 by the transfer belt 115. Then, the fixing roller pair 116 heats and presses the image of the sheet S to fix it, and conveys it to the sheet discharge roller 107 of the sheet discharge section 105. Further, the sheet S copied by the sheet discharge roller 107 is discharged to the sheet discharge tray 108. It is configured to discharge.

Therefore, in the conveying path 106 for the sheet S, the jam processing area A is formed in the area including the conveying roller pair 111 and the registration roller pair 112, and the registration roller pair 11 is formed.
2 and another jam processing area B is set in an area including the fixing roller pair 116 of the image forming unit 104. A cover or the like is provided in these areas A and B so that they can be opened when a jam occurs. Also,
As the jam processing device 120, a jam processing unit 121 is attached to the paper inside roller 111a that carries the paper S by rotating the conveyance roller pair 111 counterclockwise. Registration roller pair 112 and fixing roller pair 116
Also in the same manner, the paper inner side rollers 112a, 116a
Further, processing means 122, 123 are attached.

The jam processing device 120 will be described in detail with reference to FIG. First, the shaft 111b of the paper inner side roller 111a of the conveying roller pair 111 is supported by the bearing 202 of the support plate 201 and is projected to the outside. Also in the registration roller pair 112 and the fixing roller pair 116, the shafts 112b and 116b of the paper inner side rollers 112a and 116a are similarly projected via the bearing 202 of the support plate 201.

Therefore, the jam processing area A on one side will be described. In this area A, the sheet S is covered by the rollers 111a,
There is a case in which one or both of the sheets 112a are jammed and jammed. In this case, by rotating the respective processing means 121 and 122 in the same direction, the sheet S can be placed in the area A.
It is desirable to send it inside. Therefore, the roller 111a of the conveying roller pair 111 may be rotated in the conveying direction, and the processing means 121 integrates the knob 210 with the roller shaft 111b by rotating in the same counterclockwise direction as the conveying direction. It is configured by attaching via 211. Further, the processing means 122 of the registration roller pair 112 rotates the roller 112a in the same rotation as the knob 210.
It is necessary to rotate the machine in the direction opposite to the transport direction.
12 are separately attached by the shaft 213 of the support plate 201.
The knob 212 is connected to the roller shaft 112b through a reverse gear pair 214 and a one-way clutch 215 that is integrated by rotating in the clockwise direction. Thus,
By rotating the two knobs 210 and 212 in the same counterclockwise direction as the transport direction, the roller 111a can rotate in the transport direction and the roller 112a can rotate in the counter transport direction.

The other jam processing area B will be described. In this area B, the paper S may jam at the separating section or the fixing roller pair 116, and in this case as well, it is desired to send the paper S into the area B. Therefore, the roller 116a of the fixing roller pair 116 may be rotated in the counter-conveying direction, and the processing means 123 then rotates the roller shaft 11a.
A knob 216 is attached to 6b via a one-way clutch 217 that is integrated by rotation in the same clockwise direction as the counter-transport direction. Further, the registration roller pair 112 in this case
Then, the relationship is opposite to the above, and it is necessary to rotate the roller 112a in the transport direction with the same rotation as the knob 216. Therefore, in the processing means 122, the other knobs 218 are separately attached by the shafts 219 of the support plate 201, and the knobs 218 are rotated through the reverse gear pair 220 and the one-way clutch 221 which is integrated by counterclockwise rotation. Axis 11
2b is connected. In this way, the two knobs 216, 2
By rotating 18 in the same clockwise direction as the counter-transport direction, the roller 112a can rotate in the transport direction and the roller 116a can rotate in the counter-transport direction.

Next, the jam processing operation of this embodiment will be described. First, a case in which a jam occurs in the jam processing area A will be described with reference to FIG. 3A. In this area A, the two knobs 210 and 212 are both manually rotated in the counterclockwise direction to cause the one-way clutch 211. , 215 are engaged with each other to rotate the conveyance roller pair 111 and the registration roller pair 112. Therefore, in the case of the jammed paper G1 sandwiched between the conveyance roller pair 111, by rotating the knob 210, the conveyance roller pair 111 rotates in the conveyance direction and the jammed paper G1 advances to the inside of the area A,
Therefore, the jammed paper G1 is easily removed. Also,
In the case of the jammed paper G2 sandwiched by the registration roller pair 112, by rotating the knob 212 of the jammed paper G2, the registration roller pair 112 is rotated in the reverse direction and rotated in the anti-conveyance direction. And the jammed paper G2 is similarly removed. Further, the conveying roller pair 111
In the case of the jammed paper G3 sandwiched between the registration roller pair 112 and the registration roller pair 112, the two knobs 210 and 212 are rotated. Then, the rear portion of the jammed paper G3 moves forward and the front portion moves backward, and in this case also, the jammed paper G3 is sent into the inside of the area A and properly removed.

A case where a jam occurs in another jam processing area B will be described with reference to FIG. 3B. In this area B, both of the two knobs 216 and 218 are manually operated in the clockwise direction opposite to the above. By rotating, the one-way clutches 217 and 221 are engaged and the registration roller pair 112 and the fixing roller pair 116 rotate. Therefore, in the case of the jammed paper G4 sandwiched by the transfer separation charger 114, the other knob 218 of the processing means 122 of the registration roller pair 112 is rotated, so that the registration roller pair 1 is rotated.
12 rotates in the reverse direction and rotates in the conveying direction.
4 advances into the area B and is easily removed. Also,
In the case of the jammed paper G5 sandwiched between the fixing roller pair 116, by rotating the knob 216, the fixing roller pair 116 rotates in the anti-conveyance direction and the jammed paper G5 retracts into the area B. Similarly, the jammed paper G5 is removed.

In this embodiment, the two knobs 210, 212 in one area A are provided with pulley grooves 210a, 21.
When 2a is provided and the belt 230 is hung, the knob 210,
By rotating either 212, the transport roller pair 111 and the registration roller pair 112 can be correctly rotated. Similarly, the same effect can be obtained by hanging the belt 231 on the two knobs 216 and 218 in the other area B via the pulley grooves 216a and 218a.

Another embodiment of the present invention will be described with reference to FIG. In this embodiment, the processing means 121 of the conveying roller pair 111 is constructed by attaching the pulley 400 to the roller shaft 111b via the one-way clutch 210. Then, one knob 212 in the processing means 122 of the registration roller pair 112 and the belt 401 on the pulley 400.
It is possible to rotate in the same direction by interlocking with the rotation of the knob 212. Further, the processing means 123 of the fixing roller pair 116 is also configured by attaching a similar pulley 402, and the processing means 122 of the registration roller pair 112.
The other knob 218 is connected by a belt 403 so as to be interlocked. Other than that, the configuration is the same as that of FIG. 1, and the same portions are denoted by the same reference numerals and the description thereof is omitted.

Therefore, when a jam occurs in one of the jam processing areas A, one knob 212 of the processing means 122 is used.
Is rotated in the counterclockwise direction, the conveying roller pair 111 and the registration roller pair 112 are simultaneously rotated, so that the jammed paper is fed into the area in any jammed state. Further, when a jam occurs in the other jam processing area B, the other knob 218 of the processing means 122 is rotated in the clockwise direction, and similarly, the registration roller pair 1
12 and the fixing roller pair 116 rotate at the same time, and in this case, jammed paper in any state is sent into the area.

[0019]

As described above, according to the present invention,
In a device having a sheet conveyance path, by rotating the processing means of two roller pairs in one jam processing area in the same direction, it is possible to send out jammed paper in any jammed state into the area. Therefore, it is possible to properly remove the jammed paper without causing a mistake in rotation or a hesitation with respect to various kinds of jammed paper. Two jam processing areas are set in the front stage and the rear stage of the registration roller pair, so that the work is easy. In the area before the registration roller pair, the rotation direction of the jam processing is set to the conveyance direction, and in the area after the registration roller pair, the rotation direction of the jam processing is set to the anti-conveyance direction.

In another embodiment, since the processing means of the two roller pairs in the jam processing area can be interlocked with one knob, the workability of the jam processing is good, and the misdirection of the rotation direction is reduced. ..

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a jam processing device according to the present invention.

FIG. 2 is a cross-sectional view showing a main part of the same embodiment of the jam processing device according to the present invention.

FIG. 3 is an explanatory diagram showing an operation state of jam processing in the jam processing apparatus according to the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the jam processing device according to the present invention.

[Explanation of symbols]

106 Conveyance Path 111 Conveyance Roller Pair 112 Registration Roller Pair 116 Fixing Roller Pair 120 Jam Treatment Device 121 Treatment Means 122 Treatment Means 123 Treatment Means A Jam Treatment Area B Jam Treatment Area

Claims (4)

[Claims] 1. In an apparatus in which a plurality of roller pairs having a transport function and various functions are arranged in a sheet transport path, one or a plurality of jam processing areas are set by at least two roller pairs, and the jam processing is performed. A jam processing device, wherein each pair of rollers in the area is provided with processing means so that jammed paper in any state can be fed into the area by rotating in the same direction. 2. The jam processing apparatus according to claim 1, wherein the processing means of the two roller pairs are operably connected to each other, and a knob for processing rotation is provided on either one of the processing means. 3. The jam processing area is a first area including a registration roller pair and a sheet feeding side conveyance roller pair, and a second area including a registration roller pair and a fixing roller pair in an image forming unit. In the first area, the knob of the processing means is rotated in the conveying direction, and in the second area, the knob of the processing means is rotated in the anti-conveying direction, so that the jammed paper is fed into each area. The jam processing device according to claim 1. 4. The registration roller pair processing means has a knob in a first area and a knob in a second area, and both knobs are connected to the registration roller pair via a reverse gear pair and a one-way clutch. The jam processing apparatus according to claim 3, wherein the jam processing apparatus is a jam processing apparatus.