KR950003315B1 - Paper guide apparatus in a transfer part of a copier - Google Patents

Abstract

The paper guide apparatus is constructed that a hole is formed in the center of the paper guide in a shield case length direction, a paper insert guide plate having a hook is formed on both sides of the hole, the hook being hooked on the outer of the side of the shield case, an emitting guide plate having a hook is formed opposite to the paper insert guide plate, the hook being hooked in an insert groove formed on the side wall of the shield case, and a cover is formed on both ends of the hole, the cover covering an end block.

Description

Transfer section paper guide device of machine using electrophotographic method

1 is a schematic diagram of a device using an electrophotographic method.

Figure 2 is a perspective view of the transfer unit paper guide of the present invention.

3 is a state diagram using the transfer unit paper guide of the present invention.

* Explanation of symbols for main parts of the drawings

1: shield case 2: corona wire

3, 4: end block 5: paper guide

6: hole 8: hook

9: job guide guide 11: insertion groove

12: hook 13: discharge guide guide

14: cover

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a transfer unit of an apparatus using an electrophotographic method, and more particularly, to improve the paper guide which is provided so that the paper is connected to the photosensitive member surface when the image of the toner formed on the photosensitive member is transferred onto the paper by the transfer machine. A device for improving the transfer efficiency by stabilizing the photosensitive member contact surface of the paper with simplicity.

A commonly used copying apparatus is described below with reference to the electrophotographic copying system system shown in FIG.

Understand the corona discharge of the charger 25 evenly charges the surface of the photoconducter 28 and the portion charged by the rotation of the photosensitive drum 28 by the light source of the exposure lamp 22 The light is reflected by the light reflected from the original on the platen glass 21.

After this exposure, the axial magnification and the like are processed by the four mirrors 23 and the lens 24, and an electrostatic latent image such as an image of the original is generated on the photosensitive drum 23. At this time, the generated latent image is developed with a toner while passing through the developing unit 27 to become a visible image, and is then transferred onto the copy paper fed by the feeding roller 20. The visible image on the photosensitive drum 28 causes the copying paper 31 to be transferred.

At this time, the copy paper is in close contact with the photosensitive drum 28 by the electrostatic force and the separator 33 serves to separate the close contact with the copy paper.

The separated copy paper is then conveyed by the conveying belt 30 and passed between the heating roller 35 and the pressure roller 34 of the fixing part 40 to the copy surface by heat and pressure. The image of the original is settled and transferred to the discharge tray 39 side to make a desired copy. On the other hand, residual toner and a latent image are present on the drum passing through the transfer machine 32, where the toner is removed by an eliminating biade 29, and the latent image is an erase lamp array 37. It is to be removed by.

Conventional transfer device in the operation device as described above is the end block is installed on both ends of the shield case and the paper guide installed on the shield case to secure the electrode portion and the corona wire consisting of a shield case and corona wire In the paper guide is mainly composed of a guide surface for guiding the paper on one side wall of the shield case which is located toward the side where the paper is incident, and the entrance guide having a locker to be supported by the wall surface is installed and the shield case On the other side wall of the film and the roller having a predetermined surface so that the paper is discharged is installed.

As described above, the paper of the paper feed cassette is fed by the operation of the device, passes through the transfer roller, and passes through the transfer machine. At this time, the paper is guided by the entrance guide guide of the paper guide guide installed on one side wall of the shield case constituting the transfer machine. At the same time, the toner visible image on the photosensitive member is transferred by the transfer machine, and at the same time, the transfer operation is performed in a state of being widely contacted with the surface of the photosensitive member by a film or roller installed on the other side wall.

As the transfer operation is performed in a state where the paper is in wide contact with the photosensitive member as described above, the transfer effect is increased and the transfer efficiency is improved, as well as the smooth conveyance of the paper, and the static electricity due to the slippage of the paper is also alleviated.

However, the conventional technology as described above has a problem in assembling because the paper guide guide has a separate incident discharge guide, and the guide guide goes through a complicated structure by using a film or roller, and at the same time, a factor in the cost of the product increases. It became.

The present invention has been made to solve the above problems, the object of the present invention is to improve the paper guide guide of the transfer machine to simplify the transfer unit and at the same time easy to assemble, as well as to reduce the production cost of the product The purpose of this invention

When described in detail based on the accompanying drawings the technical configuration of the present invention for achieving the above object.

End blocks 3 and 4 installed at both ends of the shield case 1 and the shield case to fix the electrode part made of the corona wire 2 of the shield case 1 and the corona wire 2 of the electrode part. In the transfer machine having a paper guide guide (5) in the upper portion of (1), the paper guide guide (5) has a hole (6) formed in the longitudinal direction of the shield case (1) in the center, the hole (6) ), Both sides of the longitudinal direction are provided with a paper incident guide piece 9 having a hook 8 so as to be vertically downwardly fitted to the outer surface of the side wall 7 of the shield case 1, and the paper incident guide piece 9 is provided. On the side opposite to the discharge guide guide piece 13 to be convex upward with a hook 12 to be fitted into the insertion groove 11 formed in one side wall 10 of the shield case (1) A cover 14 formed at both ends of the hole 6 to cover the end blocks 3 and 4. It is composed of

Looking at the effects of the present invention configured as described above are as follows.

When the image of the toner formed on the surface of the photosensitive member is transferred onto the paper by the transfer machine, the paper guide guide 5 which is provided for the transfer efficiency of the transfer machine and the guide of the stable paper is shielded with the end blocks 3 and 4 at both ends. It is to be coupled to the upper side of both side walls (7, 10) of the case 1, the hook 12 formed on the discharge guide guide piece 13 of the paper guide guide (5) one side wall of the shield case (1) After inserting from the inside into the insertion groove (11) formed by the (10), the paper guide guide piece (9) of the paper guide guide (9) is grasped by pressing down the hook formed below the paper entrance guide piece (9) 8) is coupled to be supported by the outer surface of the side wall 7 of the shield case 1, thereby covering the upper surface of the end blocks (3, 4) by a cover 14 located at both ends.

When the paper guide guide 5 is combined as described above, the transfer machine is mounted on the transfer mounting unit of the machine. The paper loaded in the paper feed cassette of the machine is loaded by operating the machine while the transfer machine is mounted as described above. After being transported by the transport roller is transported to the transfer machine by the transport roller. At this time, the paper is moved while being guided by the paper incident guide piece 9 of the transfer machine, and the toner visible image on the photosensitive member is transferred onto the paper by the transfer voltage of the transfer machine through the hole 6 of the paper guide guide 5. At the same time as the guide of the discharge guide guide 13 is a stable transfer operation is made

As described above, the present invention integrates and simplifies the paper guide guide of the transfer machine, thereby eliminating the positional error between the entrance guide guide and the discharge guide guide of the paper, thereby increasing the contact efficiency of the paper and at the same time, stable conveyance. It is possible to achieve this, and to solve the trouble of the parts assembly process according to the simplification of parts, as well as to reduce the production cost of parts.

Claims (1)

An end block (3, 4) and the shield case provided at both ends of the shield case (1) to fix the electrode portion consisting of the shield case (1) and the corona wire (2) and the corona wire (2) of the electrode portion In the transfer machine having a paper guide guide (5) in the upper portion of (1), the paper guide guide (5) has a hole (6) formed in the longitudinal direction of the shield case (1) in the center, the hole (6) ), Both sides in the longitudinal direction are provided with a paper incident guide piece 9 having a hook 8 so as to be vertically downwardly fitted into the outer surface of the side wall 7 of the shield case 1, and the paper incident guide piece 9 The discharge guide guide piece 13 is provided on the opposite side thereof with a hook 12 to be fitted into the insertion groove 11 formed in one side wall 10 of the shield case 1 at the lower side thereof. Forming a cover 14 to cover the end blocks 3 and 4 at both ends of the hole 6. Configuration doeeojim transfer portion the paper guide device according to claim a.