JPH0940224A - Paper feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily undo a jam with fingers inserted into the portion where the jam has occurred by providing a longitudinal feed guide means with both a movable guide part constituting an automatic feed passage between the guide means and the fixed guide part of an automatic paper feed means and a slave separating member that works in collaboration with the master separating member of a manual paper feed means. SOLUTION: Paper is fed by a grip roller 5 and a second slave roller 36 on a reversal passage 9, is guided onto the lower surface of a wedge-shaped part 29 formed on the top of the movable guide part 27 of a longitudinal feed guide means 21 and placed in a position opposite to the junction of the reversal passage 9 and a manual feed passage 14, and is fed to an image forming part 8 at appropriate timing. If the paper fed to the image forming part 8 is jammed, e.g. on a common passage 7, the feed guide means 21 is moved to an open position, the paper is removed by fingers, and the jam that has occurred on the reversal passage 9 or the manual feed passage 14 is undone likewise. After the paper is removed, the longitudinal feed guide means 21 is moved to a closed position and restored to its initial state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device.

[0002]

2. Description of the Related Art Conventionally, many parts of a sheet conveying device of this type are constructed in the same manner as the embodiment of the invention shown in FIG. 1, and therefore, description will be made with reference to this. It is an automatic paper feeding means having a tray 1 for storing a large number of paper sheets, a pickup roller 2 for feeding the paper sheets one by one from the tray 1, a feed roller 3, a separation roller 4, a grip roller 5, and a first driven roller 6. 7, a reversing conveyance path 9 for reversing and conveying the paper fed from the automatic paper feeding means 7, a fixed guide stand 10 which is swingably attached to the machine frame and stacks a plurality of manually fed papers, And a pick-up roller 12 configured to swingably connect to the fixed guide table 10 and a movable guide table 11 on the downstream side in the transport direction, and a pickup roller 12 that feeds the sheets stacked on the manual table one by one. A manual feed means 15 having a main separating member 13 composed of a feed roller, a manual feed path 14 for feeding the paper fed from the manual paper feed means 15, a reversing feed path 9 and a manual feed path. 14 Reverse the paper fed from A free, it has become one equipped with a conveying path 17 having a registration roller 16 for conveying the image forming unit 8. In the illustrated image forming apparatus, 70
Is a photoconductor, 71 is a developing unit, 72 is a fixing unit, and 73 is a paper discharge unit.

By the way, in such a sheet conveying apparatus, when a jam occurs in the reverse conveying path 9, the manual conveying path 14, the common conveying path 17, etc., the manual sheet feeding means 15 becomes an obstacle and the user is Jam processing is difficult because it is not possible to put fingers in this generation part, and especially when a jam occurs in the shared conveyance path 17, when the user removes a part of the jammed paper,
If it is left in front of the registration roller 16, it cannot be removed and paper cannot be fed from the automatic paper feeding means 7 or the manual paper feeding means 15. Therefore, a serviceman must be called to remove this residual paper. There is a problem that it must be.

Therefore, as a solution to such a problem, the one disclosed in JP-A-6-110278 has been proposed. It is similar to the one described above, as shown in FIG.
8, the vertical conveyance guide means 2 is provided below the manual paper feeding means 15 at the lateral lower end of the automatic paper feeding means 7.
The lower end of 1'is pivotally connected to vertically convey a vertical conveying guide means 21 'so that it can be opened and closed downward by a predetermined angle, and the vertical conveying guide means 21' is connected to the fixed guide portion 23 of the automatic paper feeding means 7. A movable guide portion 27 'constituting the reversing conveyance path 9 is provided between
Further, between the reversing conveyance path 9 and the manual conveyance path 14, a conveyance roller 74 composed of a driving roller and a driven roller is displaceably provided in the machine frame, and other portions similar to those of the conventional one are provided. Are denoted by the same reference numerals and description thereof will be omitted.

[0005]

By the way, in such a case, when the sheet is conveyed, the vertical conveyance guide means 21 'is set to the closed position which is erected as shown in FIG.
The sheet is sent out from the reverse conveyance path 9 and is conveyed to the image forming unit 8 via the common conveyance path 17. If a jam occurs in the reverse conveyance path 9, the manual conveyance path 14, the common conveyance path 17, etc. during such sheet conveyance, the vertical conveyance guide means.
21 'is moved to an inclined open position as shown in FIG. 8, and a space formed between the automatic paper feeding means 7 and the vertical conveyance guide means 21' is utilized, and fingers are inserted into this space to remove jams. Will be done. In this case, the jam generated in the upper part of the space portion can be easily treated because the space between the fixed guide portion 23 and the movable guide portion 27 'is large, but the jam generated in the lower portion is , Fixed guide part 23
Since the space between the movable guide portion 27 'and the movable guide portion 27' is small, its processing work is difficult, and since the transport roller 74 is provided in the machine frame, it is difficult to perform necessary maintenance for these. There is a problem that is.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the problem of the conventional sheet conveying device, and when a jam occurs in the reverse conveying path, the manual conveying path, or the common conveying path, the manual sheet feeding means interferes. The user can put his / her fingers in this part and the jam can be easily removed. Especially, when a jam occurs in the common transport part and the user removes a part of the jammed paper. However, even if it remains just before the registration roller, it can be easily processed, and if a jam occurs in the reverse conveyance path, a large space necessary for the processing is formed, so the jam processing by the user can be performed. An object is to provide an easy paper transport device.

[0007]

In order to achieve the above object, the invention according to claim 1 is, in the conventional sheet conveying apparatus, below the manual sheet feeding means on the side of the automatic sheet feeding means. The vertical conveyance guide means is installed in such a manner that it can be opened and closed in the horizontal direction, and the main guide of the manual feeding means and the movable guide portion that constitutes an automatic conveyance path between the vertical conveyance guide means and the fixed guide portion of the automatic paper feeding means. The present invention is characterized in that a separation member and a sub separation member that cooperates are provided.

According to a second aspect of the present invention, in the first aspect of the present invention, the vertical conveying guide means is provided with a wedge-shaped portion arranged at a confluence portion of the manual conveying path and the automatic conveying path. It is characterized by. According to a third aspect of the present invention, in the invention according to the first or second aspect, the vertical separation guide means is moved to the open position so that the sub-separation member provided in the vertical conveyance guide means becomes the manual feed means. It is characterized by being separated from the main separating member. Claim 4
In the invention according to any one of claims 1 to 3, the invention is described in any one of claims 1 to 3, in which the hand stand is a fixed guide table on the upstream side in the conveying direction, and the downstream side in the conveying direction is swingably connected to the fixed guide table. And a movable guide stand for moving the vertical conveyance guide means to the open / close position.
It is characterized in that a cam for pushing up the movable guide member is provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the embodiments of the present invention shown in the drawings, the same parts as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted. A vertical conveyance guide means 21 is arranged below the manual paper feed means 15 on the side of the automatic paper feed means 7. The vertical conveyance guide means 21 has a casing 22.
Reference numeral 22 denotes a movable guide portion 27 on the side of the automatic paper feeding means 7, a rear side portion 24 detachably attached to the movable guide portion 27, and a casing main body in which the movable guide portion 27 and the rear side portion 24 are assembled in a detachable manner. And a cover 26 fitted therein. Then, by moving the vertical conveyance guide means 21 to the closed position above the cover 26, a cam that pushes up the movable guide base 11 of the manual paper feeding means 15 is moved.
33 are provided.

A vertical reversing conveyance path 9 is formed between the movable guide portion 27 and the fixed guide portion 23 of the automatic sheet feeding means 7 facing the movable guide portion 27, and the movable guide portion 27 and the fixed guide portion 23 face each other. The casing 22 can be opened and closed laterally by connecting one vertical edge with a connecting member (not shown), and a separation roller that cooperates with the main separating member 13 of the manual paper feeding means 15 is provided on the upper portion of the casing 22. The sub-separation member 28 is made of, and the sub-separation member 28 may be constituted by a friction plate such as a friction pad instead of the separation roller. Further, a wedge-shaped portion 29 is formed at a position facing the confluence of the reversing conveyance path 9 and the manual conveyance path 14 of the movable guide portion 27.

The casing 22 of the vertical conveyance guide means 21
As shown in FIG. 3, a horizontal partition wall 39 is provided on the upper part of the movable guide portion 27, and a support plate 41 is established in the partition wall 39.
A pair of rotary shafts 43, 44 are supported by the support plate 41, one end of the rotary shaft 43 is attached with a sub-separation member 28, and the upper portion of the support plate 41 is fitted into a support groove 46 having an opening. A spring 47 is provided in the support groove 46 to urge the sub separation member 28 upward. Gear 4 that meshes with both rotary shafts 43 and 44
8 and 49 are attached. As the mechanism of this part,
Adopting the one disclosed in JP-A-59-69328,
This is as shown in FIG. 4, and the main separating member 13 is rotated in the sheet feeding direction at a predetermined timing via a clutch by a driving member (not shown). On the other hand, the sub separation member 28 is attached to the rotary shaft 43 via the torque limiter 30, and the rotary shaft 43 is a rotary shaft rotated by a drive member (not shown).
It is designed to be rotated by 44 via gears 48 and 49.

The fixed guide portion 23 of the automatic sheet feeding means 7 is provided with a through hole 34 in the lateral direction, and a part of the grip roller 5 is exposed from this through hole 34, and the vertical conveying guide means 21 is provided.
A second driven roller 36, which comes into contact with the grip roller 5 when the vertical conveyance guide means 21 is positioned at the closed position as shown in FIG. 1, is attached to the movable guide portion 27 of the second driven roller 36. It is exposed to the outside through a through hole 37 provided in the movable guide portion 27, and a part of the paper sensor 38 is exposed through a through hole 40 provided near the second driven roller 36.

In the above-mentioned configuration, when the sheet is conveyed, the vertical conveyance guide means 21 is set to the closed position as shown in FIG. Then, by the manual paper feeding means 15,
When carrying out a sheet conveying operation, a plurality of sheets which are manually inserted and stacked on the manual tray are sent out from the manual tray by the pickup roller 12 in the same manner as the conventional one, but the main separating member 13 and the sub separating member are used. When there is no sheet between the sub-separator 28 and one sheet, the sub-separation member 28 is used as the main separation member 13
And two or more sheets are driven by the main separation member 13 and the sub separation member.
When the paper is fed to the paper 28, the sub separation member 28 rotates in the returning direction by overcoming the frictional force between the paper sheets. In this way, the sheets are separated one by one and fed to the manual feeding path 14, guided by the upper surface of the wedge-shaped portion 29, and fed to the registration rollers 16 of the common feeding path 17 to form an image at an appropriate timing. The paper is fed to the unit 8.

Next, when the sheet is conveyed by the automatic sheet feeding means 7, the vertical conveying guide means 21 is at the closed position, and the tray 1 is automatically moved by the automatic sheet feeding means 7 in the same manner as the conventional one.
From the pickup roller 2, the feed roller 3, the separation roller 4, the grip roller 5, and the first driven roller 6 to the movable guide portion 27 of the casing 22 of the vertical conveyance guide means 21 and the fixed guide portion of the automatic paper feeding means 7. Sheets are fed one by one to the reverse conveyance path 9 formed between the sheet and the sheet 23.
The sheet is conveyed by the grip roller 5 and the second driven roller 36 in the reverse conveyance path 9 and formed on the movable guide portion 27 of the vertical conveyance guide means 21.
The common conveying path is guided by the lower surface of the wedge-shaped portion 29 arranged at a position facing the confluence of the reverse conveying path 9 and the manual conveying path 14.
The sheet is conveyed to the registration rollers 16 and is fed to the image forming unit 8 at an appropriate timing.

When the paper 51 fed to the image forming section 8 as described above causes a jam in the common conveyance path 17, the vertical conveyance guide means 21 is moved to the open position as shown in FIG. The paper 51 is removed by the fingers 50, and the jam generated in the reverse conveyance path 9 or the manual conveyance path 14 is processed in the same manner. After removing the paper 51, the vertical conveyance guide means 21 is moved to the closed position and returned to the original position.

When the vertical conveyance guide means 21 is moved to the open position or the closed position as described above, the vertical conveyance guide means 21
Since the cam 33 provided on the upper part of the cover 26 of the above pushes up the movable guide table 11 of the manual transfer table, the secondary separation member 28 of the vertical conveyance guide means 21 may collide with the manual table and damage them. There is no.

FIG. 5 shows a modified example of the sub-separation member 28. The sub-separation member 28 is not supported by the spring 47 as in the above example, but is provided in the partition wall 39 of the casing 22. 1
The rotation shaft 43 is supported by one arm 55 of the first bell crank 54, which is supported by the support shaft 53 so as to be swingable in the vertical direction, and the other arm 56 is provided with a spring 57 having one end attached to the partition wall 39. The end is attached, the rotating shaft 43 is provided with a rising tendency, and a locking plate 58 is formed at the tip of the arm 56. A second bell crank 61 is rotatably supported by a second support shaft 59 provided on the partition wall 39 in a lateral direction, and one arm 62 of the second bell crank 61 has a spring 63 having one end attached to the partition wall 39. The end is attached so that the tip end thereof is always engaged with the locking plate 58 by the pulling force of the spring 63, and the tip end of the other arm 64 is provided when the vertical conveyance guide means 21 is in the open position. It is in a solid line position protruding from the side surface of the movable guide portion 27 of the casing 22, and when in the closed position, it is in a chain line position where it is pressed and retracted by the side surface of the fixed guide portion 23 of the automatic sheet feeding means 7. .

With this modified example, paper is fed in the same manner as in the above example, but when the vertical conveyance guide means 21 is in the closed position, the second bell crank is used.
The other arm 64 of 61 is pressed and retracted by the side surface of the fixed guide portion 23 of the automatic sheet feeding means 7 as shown by the chain line in FIG. 5, and the one arm 62 resists the tensile force of the spring 63. The locking plate 58 of the other arm 56 of the first bell crank 54, which is retracted and is engaged with the first bell crank 54, is pulled by the spring 57 and is pulled by the first support shaft 53.
The arm 55 swings in the clockwise direction around, and the one arm 55 moves upward on the rotation shaft 43 of the sub separation member 28 to bring the sub separation member 28 into contact with the main separation member 13. Then, when the vertical conveyance guide means 21 is moved to the open position, each part operates in the opposite manner to separate the sub separation member 28 from the main separation member 13, and thus to the open position of the vertical conveyance guide means 21. The secondary separation member 28 does not collide with the hand slide and are not damaged during the movement.

[0019]

The present invention is as described above, and in the invention described in claim 1, the vertical conveyance guide means can be opened and closed laterally below the manual paper feeding means on the side of the automatic paper feeding means. Installed in the vertical conveyance guide means, a movable guide portion that constitutes an automatic conveyance path between the vertical conveyance guide means and the fixed guide portion of the automatic paper feed means, and a sub separation member that cooperates with the main separation member of the manual paper feed means. Since it is provided, when a jam occurs in the reversing conveyance section and the manual feed section and the conveyance section, the manual feed section does not get in the way and the user can put his / her finger into this generation section. It is possible to perform jam processing easily, and even if a part of the jam paper is left just before the registration roller when the user removes the paper especially when a jam occurs in the conveyance section, the remaining paper is sent without calling a serviceman. Can be easily removed, and the maintenance required for the secondary separation member is It has the effect that it is easy to implement. According to the second aspect of the present invention, since the wedge-shaped member disposed at the confluence of the manual conveyance path and the automatic conveyance path is formed in the vertical conveyance guide means, the automatic paper feeding and the manual paper feeding are performed. The sheet is accurately conveyed to the conveyance path, and when the jammed sheet is removed, it moves to the open position integrally with the vertical conveyance guide unit, so that there is an effect that it does not interfere with the jammed sheet removal. According to the third aspect of the present invention, by moving the vertical conveyance guide means to the open position, the sub separation member provided in the vertical conveyance guide means is separated from the main separation member of the manual paper feeding means. According to the invention described in the above, the manual transfer table is composed of a fixed guide table on the upstream side in the conveying direction and a movable guide table on the downstream side in the conveying direction connected to the fixed guide table so as to be swingable, When the vertical conveyance guide means is moved to the open / close position, a cam is provided that pushes up the movable guide table.Therefore, when the vertical conveyance guide means is moved to the open / close position, the sub separation member of the vertical conveyance guide means collides with the hand slide. The effect is that they are not damaged.

[Brief description of drawings]

FIG. 1 is a front view of an image forming apparatus equipped with an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation of removing a jam that has occurred in a conveyance path in the above.

FIG. 3 is a perspective view showing each part of the above-mentioned vertical conveyance guide means separated from the automatic paper feeding means.

FIG. 4 is a vertical sectional front view of the above separating mechanism.

FIG. 5 is a perspective view showing the inside of a guide plate portion of the vertical conveyance guide means.

FIG. 6 is a perspective view showing a positional relationship between the vertical conveyance guide means and a hand slide.

FIG. 7 is a front view of a main portion of a conventional sheet conveying apparatus of the same type as the present invention in a state where a vertical conveying guide unit and a manual sheet feeding unit are in a closed position.

FIG. 8 is a front view of an essential part in a state in which the conventional vertical conveyance guide unit and the manual paper feeding unit are in the closed position.

[Explanation of symbols]

1 Tray 2 Pickup Roller 5 Grip Roller 7 Automatic Paper Feeding Unit 8 Image Forming Section 9 Reversing Conveying Path 10 Fixed Guide Platform 11 Movable Guide Platform 13 Main Separation Member 14 Manual Feeding Path 15 Manual Feeding Path 17 Shared Feeding Path 21 Vertical Transport guide means 22 Casing 23 Fixed guide part 24 Rear side part 26 Cover 27 Movable guide part 28 Slave separating member 29 Wedge-shaped part 33 Cam 34 Through hole 36 Second driven roller 37 Through hole 39 Partition wall 41 Support plate 43 Rotating shaft 44 Rotating shaft 46 Support groove 47 Spring 48 Gear 49 Gear 50 Finger 51 Paper 53 First support shaft 54 First bell crank 55 Arm 56 Arm 57 Spring 58 Locking plate 59 Second support shaft 61 Second bell crank 62 Arm 63 Spring

Claims (4)

[Claims] 1. An automatic sheet feeding means having a tray for storing a large number of sheets, and feeding the sheets one by one from the tray, and a reversing means for inverting and conveying the sheets fed from the automatic sheet feeding means. It has a transport path and a manual tray for stacking a plurality of manually fed paper sheets, and a manual paper feeding means for feeding paper one by one from the manual paper tray, and a manual paper feeding means for feeding paper. A paper transporting device comprising a manual transport path for transporting paper, and a common transport path for transporting paper fed from a reverse transport path and a manual transport path to an image forming unit A vertical conveyance guide means is installed laterally below the manual paper feed means so that it can be opened and closed in the horizontal direction, and an automatic conveyance path is formed between the vertical conveyance guide means and the fixed guide part of the automatic paper feed means. A guide portion and a sub-separation member that cooperates with the main separation member of the manual paper feeding means. Paper transport device. 2. The sheet conveying apparatus according to claim 1, wherein the vertical conveying guide means is formed with a wedge-shaped portion arranged at a confluence portion of the manual conveying path and the automatic conveying path. 3. The auxiliary separating member provided on the vertical conveying guide means is disengaged from the main separating member of the manual feeding means by moving the vertical conveying guide means to the open position. 2. The sheet conveying device according to item 2. 4. The hand cradle is composed of a fixed guide table on the upstream side in the carrying direction and a movable guide table on the downstream side in the carrying direction, which is swingably connected to the fixed guide table, and serves as a vertical carrying guide means. When moving the vertical conveyance guide means to the open / close position,
4. The sheet conveying device according to claim 1, further comprising a cam for pushing up the movable guide base.