JPS61248845A - Side slip correcting device for sheet material - Google Patents

Abstract

PURPOSE:To reduce the extent of load due to paper taction as well as to make removal of a jammed sheet of paper ever so easy, by installing a guide plate guiding paper into a horizontal register roller, while moving it sidewise together with the horizontal register roller, and rotating the guide plate in addition. CONSTITUTION:The paper fed in a direction toward an arrow A is detected just before a horizontal register roller 47, while a feed roller 46 comes to a stop after the elapse of the specified time long. Since the roller 47 stops at this time, there is formed a loop between the roller 47 and the feed roller 46. Next, when a solenoid valve 55 is turned on, a lower roller 47b gets starting and simultaneously a spring clutch 53 comes on, rotating a cam 51. Together with a block 52, this cam 51 makes the roller 47 and a guide plate 150 move in a C direction. Each position after movement is detected by a sensor 60 whereby sidewise movement is stopped, and the roller 47 keeps up its rotation till paper comes off. And, when the guide plate 150 is rotated clockwise, it uplifts an upper roller 47a, and since a clearance is formable between both upper and lower rollers, removal of the jammed paper also is made ever so easy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sheet material lateral deviation correction device, in particular, for example,
The present invention relates to an image forming apparatus such as an electrophotographic copying machine, a micro device, or a recording device.

Hereinafter, a copying machine will be described as an example of an image forming apparatus, but the present invention is not limited thereto.

[Conventional technology]

In recent years, in electrophotographic copying machines, as shown in Figure 8,
Machines have been devised in which a transfer paper transport path for double-sided copying or multiple copying is provided within the electrophotographic copying machine. In this type of device, for example, the rollers of the conveyor roller pair may be pressed against each other with uneven force over their entire length, or these rollers may be slightly distorted due to manufacturing reasons, resulting in a conical shape or the like. The transfer paper often gets stuck due to reasons such as the fact that the surface of one of the roller pairs is dirty, or the axis of this roller pair is not perpendicular to the direction of travel of the transfer paper. The conveyance path is oblique to the predetermined conveyance path, causing a problem of conveyance failure. Therefore, an apparatus using lateral registration rollers 147 as shown in FIG. 8 may be considered.

The configuration of FIG. 8 will be explained below. However, the configuration shown in FIG. 8 itself is not publicly known.

FIG. 8 is a sectional view of the copying apparatus. Cumulative placement glass 10
The original 102 placed on the paper 1 is illuminated by a lamp 103, and its light image is reflected by a reflecting mirror (104°, 105, 106,
107, 108, 109) and a lens 110, the light is guided onto the photosensitive drum 111. Lamp 103 and mirrors 104, 105, and 106 scan original 102 at a predetermined speed in the direction of the arrow. On the other hand, since the photosensitive drum 111 is also rotated in the direction of the arrow after its surface is uniformly charged by the charger 112, electrostatic images corresponding to the original image are sequentially formed on the drum surface. Color toner (for example, red, blue 1, etc.) is placed around the photosensitive drum 111.
A color developing device 113 containing black toner and a black developing device 114 containing black toner are provided. Each of these developing devices is movable in the direction of the arrow, and approaches the photosensitive drum 111 to visualize the electrostatic image on the drum depending on a desired color image. In the case of this figure, the color developing device 113 is separated,
Since the black developer 114 is close, a black image is formed on the drum. This image is transferred to transfer paper by a transfer charger 115. After that, 1 photosensitive dome 2 111 is cleaned by cleaner 1.
At step 16, residual toner on the drum surface is removed, and the process returns to the next step.

The transfer paper 117 performs the following operations to copy the original image. There are the following methods for feeding the transfer paper 117 into the copying apparatus. One of them is loaded in a cassette 118 and fed to a pair of rollers 120 by a paper feed roller 119.

The roller pair 120 is designed to separate only the top paper and feed it into the apparatus when multiple sheets of transfer paper 1) 7 are overlapped and fed into the device.After passing through the roller pair 120, The transfer paper 117 reaches the register roller 123 via guide plates 121 and 122. In the second method, the sheets are stacked in a cassette 124 and sent to a pair of rollers 126 by a feed roller 125. The roller pair 126 has the same function as the previous roller pair 120, and after the transfer paper 117 passes through the roller pair 126, it is transferred to the register roller 1 via guide plates 127 and 128.
It reaches 23. The other method is a so-called manual paper feeding method. In this case, if the manual tray 129 is rotated in the direction of the arrow and the transfer paper is placed on the manual tray 130 and the manual tray 129, one It is sent to the register rollers 123 in the same manner as the second method.

The register roller 123 starts rotating at a timing such that the developed image on the photosensitive drum 111 and the transfer paper match.
Transfer paper is sent to the drum surface via an upper transfer guide 131 and a lower transfer guide 132.

As mentioned above, the image on the drum surface is transferred to the transfer paper by the transfer band electric device 115, separated from the drum surface by the separation charger 133, and sent to the fixing device 135 via the nine conveyance section 134. The image on the transfer paper is fixed as a permanent image by the device 135, and the transfer paper is transferred to the first discharge roller 13.
Sent to 6.

After that, the first flapper 137, the second flapper 138
It reaches the second ejecting roller 139 via tB'2r, and is then ejected out of the copying apparatus. In the figure, the second 7 rattupa 1
38 is in a state where the transfer paper path is blocked, but this second
7. The pad 138 is made of a light material and is rotatable in the direction of the arrow, so when the transfer paper passes, it is pushed up by the leading edge of the transfer paper and assumes a retracted position relative to the transfer paper. Therefore, there is no problem in passing the transfer paper.

This copying apparatus is capable of performing the following operations in addition to the basic transfer paper operations described above.

One of them is an operation for performing double-sided copying.

In the case of double-sided copying, the copying operation to the first side of the transfer paper is almost the same as the basic operation described above, and the transfer paper is transferred to the second ejection roller 1.
It will lead you to 39. The second discharge roller 139 discharges the transfer paper to the outside of the apparatus, but when the double-sided copying mode is specified, the detection arm 140 and the optical sensor 141 detect the rear edge of the transfer paper, and the rear edge of the transfer paper is After passing the second flapper 138, the second discharge roller 139 starts rotating in reverse while holding the trailing edge of the transfer paper in its mouth. Therefore, the transfer paper is fed into the copying machine again with the trailing edge first. Then, it is sent to the pair of rollers 145 via the left slopes of the first 7-lapper 137, the second 7-lapper 138, the guide plate 142, and further through the guide plates 143 and 144. Thereafter, the transfer paper passes through a pair of rollers 146 and reaches a horizontal register roller 147. At this point, the lateral register roller 147 has stopped, and after the transfer paper has completely abutted against this roller 147, the roller pair 14
5°146 also stops. Then, the transfer paper waits for copying operation to the other side. Thereafter, when a copy signal for the other side is issued, the pair of horizontal register rollers 147 starts rotating and transfers the data to the register rollers 12 through guide plates 148 and 149.
Feed the transfer paper to 3.

Before the transfer paper reaches the register roller 123, the side edge of the transfer paper is detected by an optical sensor (not shown).

The lateral register roller moves in a direction perpendicular to the paper traveling direction, that is, in a direction perpendicular to the drawing, to correct the lateral position of the transfer paper so that the side edge is the same as the first time. The operation after the transfer paper reaches the register roller is the same as the basic operation described above, and the transfer paper with the image copied on the other side is finally ejected out of the apparatus by the second ejection roller 139. Ru.

In addition, as another movement of the transfer paper, there are two
There is an operation for multiple copying in which copies are made more than once. In the case of this operation, the movement of the transfer paper in the -th copy is almost the same as in the case of the basic operation, but when the multiple copy mode is specified, the first 7 rappers 137 are in the state shown by the broken line, and the first ejection The transfer paper sent out from the roller 136 is
It is guided by the right slope of the seventh lapper 137 and the guide plate 143, and is fed as it is to the lateral register rollers 147.

The subsequent movement of the transfer paper is the same as in the double-sided copying mode, and the transfer paper on which the second copy has been made on the same side as the first copy is finally ejected from the apparatus by the second paper ejection roller 139. Ru. Note that the first 7 ratchets 137 return to the position indicated by the solid line when the transfer paper is fed into the horizontal register roller 147 after the first copying, and prepare for the transfer paper passage 5 after the second copying. , the above-mentioned lateral register roller will be explained in detail.

The horizontal register roller is used to adjust the position of the paper in order to copy the paper once again, such as double-sided copying or multiple copying. The paper position is corrected.

First, the paper is transported by transport rollers 45 and 46 and enters the nip of lateral register rollers 47. At this time, the horizontal register roller has stopped rotating, and the conveyance roller forms a loop in the paper immediately before the horizontal register roller, and then stops.

This is to correct the skew of the paper and to allow the paper to follow the lateral movement of the lateral register o-ra with sufficient margin. Next, the horizontal register roller starts rotating and grips the paper. After the paper is sufficiently gripped by the horizontal register roller, the horizontal register roller 47 moves in a direction perpendicular to the direction in which the paper travels. While this operation is being performed, the lateral register rollers continue to rotate and convey the paper. Through this series of operations, the paper moves to the correct position set in advance, and the correspondence with the first copy image is accurate during the second copy operation, resulting in more accurate and beautiful multiple copies or double-sided copies. It can be taken.

With this configuration, the device uses oblique feed rollers to: - position the paper in the lateral direction within a shorter conveyance path compared to conventional devices that hit the edge of the paper against a guide at a reference position; can be corrected, making it possible to downsize the entire machine.

[Problem that the invention seeks to solve]

This type of device is used to (1) remove the skew of the paper and ensure that the leading edge of the paper enters the nip of the horizontal register roller;
When the horizontal register roller moves in the horizontal direction, this is to prevent the paper from being pulled in the horizontal direction between the horizontal register roller 47 and the conveyance roller 46 in front of the horizontal register roller, and to give room for the movement of the paper. , it is necessary to form a sufficient loop on the inlet side of the lateral registration roller. At this time, the paper forms a loop shaped as shown in FIG. 9, so that it is placed on the upper entrance guide plate 50 (hereinafter referred to as upper) which is fixed on the main body.

The paper will be in close contact with the guide plate.

When the lateral registration roller 47 begins to move for lateral registration adjustment in this state, the paper forming the loop rubs against the double guide plate 50 as it moves. Therefore,
In particular, if the paper rubs against the edges (cut ends of the sheet metal) close to the rollers of the guide plate, which is made of a steel plate, there are problems such as the paper getting damaged or being scratched, causing paper dust to come out and stick to the rollers.

Generally speaking, if the upper guide plate is fixed on the main body when trying to remove paper that has jammed in the horizontal register roller section, the guide plate will get in the way and remove the jammed paper near the nip of the horizontal register roller. It becomes difficult to remove the damaged and remaining paper.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned drawbacks of the conventional example, and aims to reduce the load caused by the contact between the guide plate and the paper due to the movement of the lateral register rollers, and to provide an apparatus that facilitates the removal of jammed paper. It is something to do.

[Means for solving problems]

In order to achieve the above object, a sheet material lateral shift correction device according to the present invention has a sheet material lateral registration roller that displaces a sheet in a direction perpendicular to a predetermined conveyance direction. The present invention is characterized in that it includes an entrance guide that guides the user, and that the entrance guide moves in conjunction with the displacement of the lateral registration rollers.

[Effect]

According to the feature of the present invention described above, since the guide also moves in conjunction with the displacement of the lateral registration rollers, contact slippage between the sheet and the guide does not occur.

〔Example〕

Hereinafter, a detailed explanation will be given based on specific examples.

FIG. 1 is a perspective view of the apparatus of the present invention. FIG. 2 is a front view of the device of the present invention.

In this device, the cam 51 moves the horizontal register roller in the lateral direction, and the rotation of the input gear 55a controlled by the electromagnetic clutch 55 is transmitted to the lower horizontal register roller 47b via gears 56 and 57, and the paper is fed. It is a device that will continue to be used.

Hereinafter, a specific operating procedure of the lateral register roller to which the present invention is directed will be explained.

First, paper enters from the direction of arrow A, and a sensor (not shown) detects the passage of paper just in front of the lateral register rollers. The conveyance roller 46 conveys the paper until a specific time elapses based on this timing. At this time, the horizontal register roller 47
Since the conveyance roller 46 is stopped after a predetermined time, an appropriate amount of loop is formed between the lateral register roller 47 and the conveyance roller 46. Next, when the electromagnetic clutch 55 is turned on, the rotation of the input power gear 55a is transmitted, and the lower lateral register roller 47b begins to rotate. At the same time, the spring clutch 53 is turned ON.
, rotation of the input gear 53a is transmitted to the cam 51. The cam 51 pushes the horizontal register roller block 52 holding the upper and lower horizontal register rollers 47 in the direction of arrow C, and the two upper and lower horizontal register rollers move in the horizontal direction (C direction). At this time, when the edge of the paper reaches a predetermined position, the light sensor 60 fixed on the main body is blocked by the moving paper and issues a signal, indicating that the horizontal registration correction is complete. to the controller.

As a result, the lateral movement of the rollers is stopped and the electromagnetic clutch 55 is operated until the paper is separated from the lateral register rollers.
continues to be ON to convey the paper.

Furthermore, compression coil springs 61 are attached at four locations to the upper and lower lateral register rollers 47 to press the hello rollers in the direction of arrow B. Therefore, the cam 51 continues to rotate and
When the cam moves to the limit in the direction, the inclined surface of the cam will turn to arrow B.
When the cam is displaced in the direction, the change in the inclined surface of the cam causes the roller 4 to
The compression coil springs press the upper and lower horizontal register rollers in the direction of arrow B as the rollers 7 follow.

Then, when the roller 47 moves to the home position (a specific position where it waits until paper enters), the spring clamp
A light shielding plate 54 mounted coaxially with the light sensor 53 shields the optical sensor 58 from light. This signal causes the spring clutch 53
is turned off, the rotation of the cam plate 51 is stopped, and the lateral movement of the roller is completed.

The embodiment of the present invention is particularly characterized by a lateral register roller upper guide plate 150 (hereinafter referred to as "upper guide plate").

The upper guide plate 150 of the present invention has blocks 59 at both ends of the front and back that fit with the upper roller shaft 47d.
9 is fixed to the upper guide plate 150 with screws 70. FIG. 3 is a side view of the upper guide plate 150 of the present invention, and the upper guide plate 150 is opened in the direction of the arrow about the center axis of the upper roller 47a.

The protrusion 63 is for maintaining a gap between the upper guide plate 150 and the lower guide plate 162, through which the paper passes. The professional roller 59 is the upper roller 47a.
Since the upper roller 47a is fitted at both ends of the upper roller 47a, when the upper roller 47a moves in the lateral direction, the upper guide 150 also moves at the same time as the roller moves.

Roughly speaking, since the protrusion 59 has the shape as shown in the figure (having a protrusion 59a), when the upper guide plate 150 is rotated in the direction of the arrow in Fig. 3, the protrusion 59 is shaped as shown in Fig. 4. , protrusion 5
The tip of the roller 9a contacts the central shaft 47d of the lower roller 47b. Therefore, when the lower roller 47b is fixed at a specific position on the main body and the upper roller 47a is roughly supported so as to be able to move away from the lower roller surface, the protrusion 59a of the block
The tip of the upper roller lifts the upper roller in the direction of the arrow in FIG. 4 with respect to the lower roller, and the nip between the upper and lower rollers is opened. Therefore, jam handling becomes easy.

Next, other embodiments of the present invention will be specifically described in detail.

FIG. 5 is a perspective view showing another embodiment of the invention.

The upper guide plate 165 of this embodiment is cut at both ends to form a vertically bent portion 165a, and this vertically bent portion is provided with two holes for holding the center shaft 47d of the upper roller 47a. Roughly speaking, a shaft 16 is installed at a fixed position on the main body (not shown).
4 is fixed, and this shaft 164 is also connected to the upper guide plate 165.
It penetrates through the holes on the vertical bends at both ends. Note that the lateral register block 152 has a guide groove 152a formed therein, into which the central shaft 47d is fitted.

FIG. 6 is a side view of this embodiment, and the upper guide plate 165 rotates about a shaft 164. At this time,
Since the upper guide plate 165 holds the upper roller 47a, when the upper guide plate 165 is rotated in the direction of the arrow as in the previous embodiment, the upper guide plate 165 opens as shown in FIG. are separated, making it very easy to dispose of paper that has jammed in the upper and lower rollers. In addition, when the roller moves in the axial direction for lateral registration adjustment, the upper guide plate 1
65 also moves at the same time. The shaft 164 slides in the fitting hole with the upper guide plate 165, and there is no problem with the movement of the rollers.

In the paper lateral registration adjustment device of an electronic copying machine that can automatically make multiple copies or double-sided copies as described above, the lateral register roller upper guide plate moves integrally with the rollers as in the embodiment of the present invention. However, if the configuration is such that it rotates around a roller or other axis, the contact resistance between the paper and the guide plate during horizontal registration adjustment will be reduced, the paper will be conveyed smoothly, and the guide plate will not be rough. The opening and closing of the plate makes it easier to clear jams.

〔Effect of the invention〕

Since the image forming apparatus according to the present invention has the above-described configuration, there is no occurrence of contact failure between the sheet and the guide when the lateral registration rollers are displaced, and there is an effect that damage to the sheet material can be prevented. Further, by configuring the guide so that it can be opened, there is an effect that it becomes easier to clear jams and the like.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the device of the present invention, Fig. 2 is a schematic diagram illustrating the mechanism of the device of the present invention, Fig. 3 is an autopsy view of the device of the present invention, and Fig. 4 is an open view of the upper guide plate of the device of the present invention. FIG. 5 is a perspective view showing another embodiment of the present invention; FIG. 6 is a perspective view showing another embodiment of the present invention;
The figure is an autopsy diagram showing another embodiment of the present invention, Figure 7 is a diagram showing the situation when the upper guide plate of another embodiment of the present invention opens, and Figure 8 is a copy to which the present invention is directed. A sectional view of the machine, FIG. 9, shows a situation in which the paper forms a loop at the inlet side of the lateral registration roller. 47... Horizontal registration roller,

Claims (3)

[Claims] (1) A sheet material lateral shift correction device having lateral registration rollers that displace the sheet in a direction perpendicular to a predetermined conveyance direction is provided with an entrance guide that guides the sheet to the lateral registration rollers, and the entrance guide is connected to the lateral registration rollers. A sheet material lateral slip correction device characterized in that it moves in conjunction with displacement. (2) The sheet material lateral shift correcting device according to claim (1), wherein the entrance guide rotates around the roller. (3) The sheet material lateral shift correcting device according to claim 1, wherein the entrance guide is rotatably locked around an axis fixed on the main body of the device.