JPS6031454A - Sheet transport unit for copying machine - Google Patents

Abstract

PURPOSE:To rightly transport a sheet in the transport direction by providing a partition guide member on a sheet transport surface in parallel to the sheet transport direction in such a manner as to project and retreat, thereby to prevent skewing and overlapping of right and left sheets. CONSTITUTION:A sheet transport unit 30 comprises a plurality of sheet transport belts 31-34 stretched between sheet transport rollers 35, 36 disposed in the direction rectangular to the direction of transporting sheets 15, 16, wherein a lot of air holes 37 are formed on the respective transport surfaces of the belts 31-34. In this case, a partition guide member 40 is disposed between the belts 32 and 33 in parallel to the sheet transport direction X in such a manner as to freely project and retreat to the center of the sheet transport surface. The member 40 is pivoted on an upper link pivot portion 50 of a link mechanism 49, and a solenoid 48 is coupled to a link pivot portion 47 of the mechanism 49. In this arrangement, the member 40 is projected and retreated by energizing and deenergizing the solenoid 48 to prevent skewing and overlapping of sheets 15, 16.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for conveying two sheets of paper that are simultaneously conveyed by rollers in a copying machine, etc., without causing oblique feeding or overlapping. It is related to the device.

BACKGROUND OF THE INVENTION Conventionally, for example, a conveyance device as shown in FIG. 1 has been used to convey paper in a horizontal direction within a copying machine. The conveyance device 01 of the copying machine includes conveyance rollers 02,0.
3, conveyor belts o4゜05, , O'6,07 are stretched, and a ventilation hole 08 is formed in the conveyor belt 04゜05, 06,07.
An intake fan 09 is disposed on the lower side of the conveyor belt 7, and the paper is placed on the conveyor belt 04.05.06.07.

When the conveyance rollers 02, 03 and the air fan o9 are driven, and the paper is sucked into the suction port 08 and conveyed, the speed of each belt, the error within the director's tolerance during manufacturing, and the elongation during conveyance are determined.

Due to the difference in slippage, there is a problem in that the sheets may be fed diagonally or overlap each other.

Further, when two left and right sheets of paper are conveyed at the same time, there is a drawback that the two left and right sheets of paper are not conveyed correctly because their respective oblique feeds overlap.

OBJECT OF THE INVENTION The present invention relates to an improvement of a paper conveyance device for a copying machine that overcomes the above-mentioned difficulties.The purpose of the present invention is to improve a paper conveyance device for a copying machine that overcomes the above-mentioned difficulties. without being transported.

The object of the present invention is to provide a paper conveyance device for a copying machine with a simple structure.

Structure of the Invention The present invention provides a conveying device for a copying machine that conveys paper along the plane of the sheet of the copying machine. The present invention is characterized in that it is provided with a driving means that is disposed at a desired position in the width direction of the conveyance device so as to be able to move upwardly and retractably upwardly from the paper conveyance support surface, and that causes the partition guide member to move upward and downward.

Central Example The present invention will be described below with reference to FIGS. 2 to 5.

2 is the main body of the copying machine, and as shown in FIG. Originals that are not printed are sent onto the platen glass 5.

Further, in the copying machine main body 1, an exposure system consisting of an exposure lamp 6, a mirror 7, and a lens 8 is disposed below the platen glass 5, and a drum-shaped photoreceptor 9 is pivotally supported below the exposure system. , an image of the original is formed in a slit shape on the photoreceptor 9 through the exposure system, and a drive motor connected to the photoreceptor 9 and rotating at a speed corresponding to the feed speed of the original feeder 2 is moved in the circumferential direction of the photoreceptor 90. The image of the original is exposed to light over a period of time.

Furthermore, a charging corotron 10 is provided around the outer periphery of the drum-shaped photoreceptor 9 in the circumferential direction. Developing device 11. Transfer peeling corotron 12
and a cleaner 13 are provided.

Furthermore, a paper tray 14 is arranged below it.

Two sheets of paper 15 and 16 on the left and right sides are placed on the tray 14.

A paper transport device 3o is provided extending from the tray 14 to the paper storage section 21 via the photoconductor 9 and the heat fixing roller 2°.
The sheets 15 and 16 are sent to the photoreceptor 9, and the toner images on the photoreceptor 9 are transferred to the sheets 15 and 16 by the transfer/peeling corotron 12, and then the sheets 15 and 16 are peeled off from the photoreceptor 9. , the transferred toner image is fixed on the sheets 15 and 16 by the heating fixing roller 2o, and the transferred toner image is transferred to the sheet storage section 21.
I am being asked to be sent to.

Therefore, the paper conveyance belt 31° 32 of the paper conveyance device 30
, 33134 are stretched over the paper conveyance rollers 35 and 36 arranged in a direction perpendicular to the conveyance direction X of the sheets 15 and 16, and the same conveyance bell) 31 r 32133 *
341C has air hole 37 opened and the same conveyor bell) 31
, 32, 33, and 34 are stretched at intervals, and between the paper conveyance belt 32 and the paper conveyance belt 33, a partition guide member 40 oriented in a direction parallel to the paper conveyance direction The partition guide member 41 is disposed so as to be freely protrusive and retractable above the paper transport support surface of the device 30, and is attached to a housing 43 supported by the bottom plate portion 42 of the copying machine main body l, and the paper transport bell) 31, 32133,
An intake fan 44 is disposed on the lower side of the intake fan 34 .

The partition guide member 40 and its extension portion 4 are attached to the housing 43 so as to be slidable in the vertical direction.

A link pivot portion 45 is stretched over the housing 43 via a spring 46, and a link pivot portion 47 is connected to a solenoid 48 attached to the housing 43. The upper link pivot portion 50 of the parallelogram link mechanism 49 and the lower end portion 51 of the partition guide member are pivotally connected, and the partition guide member 40 is connected to a solenoid 4875 (which moves upward and downward when energized and demagnetized). It has become.

With this configuration, when two left and right sheets of paper are conveyed at the same time, the solenoid 48 is demagnetized, the partition guide member 40 is projected upward from the paper conveyance support surface, and the paper conveyance rollers 31, 32.

33, 34 and the intake fan 44 are driven, and the
The sheet of paper IF+, 16 is sucked into the suction hole 37 and conveyed.

The paper 15 is attached to the partition guide member 40, and the side edge 1 of 1.6 is attached to the partition guide member 40.
5a.

16a is guided and fed diagonally during conveyance.

They are correctly transported in the transport direction X without overlapping.

When transporting one sheet of paper having the size of two shunted sheets 15 and 16, when the solenoid 48 is demagnetized, the partition guide member 40 is moved through the parallelogram link mechanism 49. It sinks below the paper transport support surface and the paper is transported normally.

In the above-mentioned embodiment, in the copying machine configured as described above and in which the sheets 15 and 16 are conveyed along the plane of the sheets 15 and 16 of the copying machine, the sheet conveyance of the conveyance device 30 is The partition guide member 40, which is oriented with a directional pressure parallel to the direction Since the device is equipped with a driving means for moving the sheets of paper 15 and 1
6 are transported at the same time, during transport, paper 15,
If the sheets 15 and 16 are conveyed diagonally with respect to the conveyance direction X, or if they are overlapping and subjected to force, it can be prevented that there will be a portion of the sheets 15 and 16 in which the image cannot be fixed within the heating fixing roller 20.

Furthermore, the paper conveyance belts 31 , 32 , 33 ,
The speed of 34 may vary due to errors in the circumference of the conveyor belt within manufacturing tolerances, elongation during use, slips, etc.
This is because it differs depending on each paper conveyance belt.

It is also possible to prevent the sheets 15' and 16 from being fed obliquely during conveyance.

Furthermore, one sheet of paper whose size is twice the size of each of the sheets 15 and 16 can be conveyed by sinking the partition guide member below the tilted conveyance support surface.

In the embodiment shown in FIGS. 2 to 5, the partition guide member 40 is attached at its extension portion 41 to the housing 43 so as to be vertically slidable, and the link pivot portion 45 is attached to the spring 46. The upper link pivot portion 50 of the parallelogram link mechanism 49 is stretched over the housing 43 and the link pivot portion 47 is connected to the solenoid 48 attached to the housing 43 through the upper link pivot portion 50 of the parallelogram link mechanism 49 and the partition guide. A guide rod 52 of the partition guide member 49 is also attached to the lower side of the casing 43 so as to be slidable in the vertical direction, and the parallelogram link By pivoting the guide rod 52 to the lower link pivot portion 53 of the mechanism 49, the solenoid 48 causes the partition guide member 40 to protrude and retract from the paper conveyance support surface via the parallelogram link mechanism 49. You can do it even more smoothly and with confidence.

Effects of the Invention The present invention provides a conveying device for a copying machine that conveys paper along the plane of the sheet of the copying machine. The partition guide member is disposed at a required position in the width direction of the conveying device so as to be able to move upwardly and retractably upwardly from the sheet conveying support surface, and is provided with a drive means that moves the partition guide member upwardly and retractably. When the sheets are fed diagonally with respect to the conveying direction of the paper (7), they can be conveyed in an overlapping manner, and the structure is simple, and a single sheet of paper twice the size of the previous sheet can be conveyed.

[Brief explanation of drawings]

Figure 1 is a perspective view of a paper conveyance device of a conventional copying machine;
1 is a perspective view of a copying machine to which a paper conveyance device for a copying machine according to the present invention is applied; FIG. 3 is a longitudinal sectional front view of the same; FIG. 4 is a perspective view of the paper conveyance device; FIG. ■- in Figure 4
(2) A vertical sectional side view cut along the line, FIG. l...Copying machine main body, 2...Document feeding device, 3...Document feeding roller, 4...Document feeding belt, 5...Platen glass% 6...Exposure lamp, 7... mirror,
8...Lens. 9... Photoreceptor, 10... Charged corotron, 11...
・Developer, 12... Transfer peeling corotron, 13... Cleat, 14... Tray, 15... Paper, 16...
-Paper, 17...Paper feed roller. 18... Upper guide plate, 19... Lower guide plate, 20.
・Heat fixing roller, 21 ・Paper storage section, 30 ・・
・Paper conveyance device, 31, 32, 33, 34...Paper conveyance belt, 35, 36...Paper conveyance roller, 3
7...Intake hole, 40...Partition guide member, 4"...
Extension part, 42... Bottom plate part, 43... Housing, 44...
intake fan. 45...Link pivot joint, 46...Spring, 47...Link pivot joint. 48... Solenoid, 49... Parallelogram link mechanism, 5°... Upper link pivot portion, 51... Lower end of partition guide member. 52... Guide rod, 53... Lower link pivot portion. Agent: Patent attorney Nozomi Ehara (1 person)

Claims (1)

[Claims] In a conveyance device of a copying machine that conveys paper along the plane of the sheet of the copying machine, a partition guide member oriented in a direction parallel to the paper conveyance direction of the conveyance device is arranged above the paper conveyance support surface of the conveyance device. 1. A paper conveyance device for a copying machine, characterized in that a drive means is provided at a predetermined position in the width direction of the conveyance device so as to be freely retractable therefrom, and drive means for vertically retracting and retracting an internal member of the partition.