Image formation device

[Detailed Description of the Invention]

[0001]

[Industrial Application]

The present invention relates to the image forming device which conveyed the decalcomania paper which finished transfer to the fixing device by the paper carrying means.

[0002]

[Description of the Prior Art]

If it is in an image forming device, the process of electrification, image exposure, and development is performed on the peripheral surface of an image support object, for example, the rotating photo conductor drum, and the toner image formed by development is transferred on the decalcomania paper synchronized and conveyed.

[0003]

The decalcomania paper to which the toner image adhered by transfer is separated from a photo conductor drum, and after a toner image is fused and established on a decalcomania paper with a fixing device, it is discharged out of a device.

[0004]

The heat roller which has a heat source in an inside and rotates, and the heating roller which presses to this, and follows and rotates are used for a fixing device, and fixing is made while pinching conveyance of the decalcomania paper to which the toner image adhered is carried out between a heat roller and a pressurizing roller.

[0005]

On the other hand, since transfer is temporarily performed in the transfer to the decalcomania paper of the above-mentioned toner image where a decalcomania paper is stuck to a photo conductor drum peripheral surface, a decalcomania paper moves in the state where it was energized towards the fixing device, in the state where it dissociated from the photo conductor drum. Therefore, when transfer and separation part, and fixing device of a photo conductor drum approach and are allocated, a guide plate is provided between transfer and a separation part, and a fixing device, and the decalcomania paper to which the toner image adhered is constituted so that it may move along with a guide plate in the back. For guiding the decalcomania paper which is energized along with a guide plate and moves, For example, the opening which forms an air channel in a guide plate is provided, and a guide is made by drawing in by a fan motor so that it may move, while a decalcomania paper sticks the back to a guide plate, as it writes in the JP,62-191750,U specification.

[0006]

When [ a certain ] it grade-separates and is located, the paper carrying means is established for transfer and the separation part, and the fixing device between them. A means to make adhere to the belt object which establishes and transfers the belt object which rotates on a conveyance way as a paper carrying means, and moves in the back electrostatically, and to convey, and a plurality of holes which form an air channel in a belt object are provided, and the means attracted and conveyed is used for the belt object which moves in the decalcomania-paper back. For example, the art concerning [ JP,60-48861,A ] this is indicated.

[0007]

[Problem(s) to be Solved by the Invention]

Heat is prevented from a fixing device surrounding the external surface by an insulation means etc., and emitting it outside. However, if it is used continuously for a long time, a fixing device will come to radiate heat to the exterior. A drive motor, a control part, etc. act as a heat source. Therefore, if prolonged continuous use is carried out, the rise in heat of the inside of an image forming device will be carried out so that it may become considerable high temperature. Although photo conductors, such as OPC and Se, are used as an image support object, when photo conductors, such as this, serve as high temperature, performance will be degraded and a life will be shortened.

[0008]

An object of the present invention is to provide an image forming device with the function prevented so that generation of heat [ drive motor / which was located in the back side of a fixing device or an image forming device ] may be interrupted by the paper path portion and an image support object portion may not serve as high temperature.

[0009]

[Means for Solving the Problem]

In an image forming device which conveys the decalcomania paper to a fixing device by a paper carrying means after the present invention tends to achieve the above-mentioned object and the present invention transfers a toner image formed on an image support object on a decalcomania paper, A belt object with a pore of a large number which the paper carrying means has near the conveyance direction center, and rotate, There is a direction board formed in the both sides, and an opening hole is established in a lateral part of a decalcomania paper conveyed by the back side of the direction board, The opening hole is connected with a suction course provided in the belt inside-of-the-body part, and an image forming device constituting so that it may be inhaled by fan motor is provided.

[0010]

[Example]

Hereinafter, a detailed description of the invention is performed using a drawing. Drawing 1 shows the important section sectional view of an image forming device which established the paper carrying means of the present invention.

[0011]

In a figure, 11 is an image support object and is a photo conductor drum which provided photo conductors, such as Se and OPC, in the drum peripheral surface and which rotates clockwise. Electrification machine 12, electric discharge machine 13 for frame formation, image exposure means 14, developing means 15, transfer electrode 16, separation electrode 17, separation nail 18, and the cleaning means 19 grade are allocated in the edge part of a photo conductor drum, and image formation is made by the following process. That is, after uniform electrification is carried out with electrification machine 12 on rotating photo conductor drum 11, with electric discharge machine 13, light irradiation is performed outside the screen limit and electrification of a screen outside the limit is removed. Subsequently, by image exposure means 14 which performs scanning exposure of a manuscript side, image exposure is performed within the screen limit on photo conductor drum 11, and a latent image is formed. The latent image on photo conductor drum 11 is developed by developing means 15, a toner adheres to a latent image portion electrostatically, and it becomes a toner image. The decalcomania paper conveyed with the 2nd feeding roller 31 which synchronizes and rotates sticks to the toner image on photo conductor drum 11 so that the tip portion may agree with the tip of a decalcomania paper, and a toner image is transferred on a decalcomania paper with the transfer electrode which operates from behind. Although photo conductor drum 11 and the decalcomania paper in an adhesion state are discharged with separation electrode 17 and separated, it cooperates and separation nail 18 operates so that the separation may be ensured.

[0012]

The decalcomania paper which finished transfer of the toner image and was separated is conveyed by decalcomania-paper conveying machine 20 which is a paper carrying means, and after fusing a toner image on a decalcomania paper by fixing assembly 32 by a heat roller method and being established, it is discharged out of a device. Although fixing assembly 32 is surrounded with thermal insulation, it becomes high temperature when carrying out prolonged continuous use, since heat is radiated outside as a heat source, and drive motor 33 is begun to the upper part back side of decalcomania-paper conveying machine 20 and the drive system is allocated, when carrying out prolonged continuous use. If fixing assembly 32 and about 33 drive motor hot air flows into the direction of photo conductor drum 11, the temperature of a photo conductor will be raised and performance will be degraded remarkably. Decalcomania-paper conveying machine 20 explained below is constituted so that hot air may be inhaled by the air intake fan motor for conveyance in addition to the conveyance performance of the good decalcomania paper which uses an air intake transportation belt, and it prevents the temperature in an image forming device from rising unfairly.

[0013]

Both Drawing 2 and Drawing 3 show what showed decalcomania-paper conveying machine 20, Drawing 2 is A View in Drawing 1 which looked at decalcomania-paper conveying machine 20 from the upper surface, and, similarly Drawing 3 is a BB sectional view in Drawing 1. Drawing left-hand side shows a back side of a device, and Drawing 2 and Drawing 3 shows [ right-hand side ] this side side of a device.

[0014]

An example is the image forming device which took the decalcomania-paper conveyance method of the center standard, and conveyance is made with transportation belt 21 which the decalcomania paper with the symmetrical paper width centering on center C provided in the center C section. Transportation belt 21 is a belt object which has small hole 211 of a large number with belt width still narrower than the decalcomania-paper width of the minimum width, It is laid [ firmly ] between driving roller 22 and driven roller 23, gear 222 fixed to the back side axis end of driving roller axis 221 which fixed driving roller 22 is engaged with the drive gear which is not illustrated, and transportation belt 21 rotates with the peripheral velocity of photo conductor drum 11, and the peripheral velocity of the speed.

[0015]

It is more slightly [ than the transportation belt 21 surface ] low, and the same height is planate and back side direction board 24A larger than transfer width and this side side direction board 24B are formed in the back and this side side. Two or more corded projection parts 241 are provided in the direction of movement of the decalcomania paper at back side direction board 24A and this side side direction board 24B, respectively, and a decalcomania paper moves so that it may slide on corded projection part 241 top which prevented Adsorption. Back side direction board 24A is fixed, and this side side direction board 24B has structure which depresses as the broken chain line of Drawing 3 shows at the time of jam, and can perform extraction of jam paper from this side side by setting a rocking axis as axis 242B. Fixed back side direction board 24A is extended under transportation belt 21, and air intake hole 243A is established in the portion which hits under transportation belt 21. In about 5 mm of outsides, for example, abbreviation, rectangular opening hole 244A is established in the Distant back side still more slightly than the decalcomania-paper outer edge section where it moves. Box shaped member 25 for forming an air style in the range which includes air intake hole 243A and opening hole 244A on the back side of back side direction board 24A is provided, and opening hole 251 is established in the bottom of box shaped member 25. Air intake fan motor 26 shown by the dotted line of Drawing 2 via sealing member 245 is provided in the bottom of box shaped member 25, and the position which approached extremely at the bottom, Inspiratory port 261 of air intake fan motor 26 serves as the position and shape which agreed with opening hole 251 of box shaped member 25 mostly, and is surrounded by sealing member 245. Many fans 262 are provided in air intake fan motor 26, the air style shown by the arrow of Drawing 3 when air intake fan motor 26 rotated clockwise and operated is formed, and it passes along exhaust air way 34, and passes along the hole provided in backside side board 35, and it is constituted so that it may exhaust at the back of an image forming device.

[0016]

If the decalcomania paper which finished transfer of the toner image to decalcomania-paper conveying machine 20 of structure explained above, and was divided into it is conveyed and a decalcomania-paper tip portion comes to the upper surface of decalcomania-paper conveying machine 20, The central portion of a decalcomania paper is on a decalcomania paper and transportation belt 21 which moves by the Fast, and the both-sides portion of a decalcomania paper moves so that it may slide on corded projection part 241 top. If a decalcomania paper reaches an air intake hole 234A portion, the small hole 211 portion of transportation belt 21 will serve as negative pressure, and will be conveyed in the form where decalcomania-paper transportation belt 21 was adsorbed to fixing assembly 32. Since air intake hole 243A is covered by the decalcomania paper if it is in this state, suction by air intake fan motor 26 is concentrated on opening hole 244A, and suction of the heat with which the back side was powerfully filled especially is made during conveyance of a decalcomania paper.

[0017]

During conveyance of a decalcomania paper, when a jam accident should arise, by the sensor etc. which are not illustrated, this is detected and transportation belt 21 stops. The operator can open wide the front door which is not illustrated by jam display, and it can perform jam processing easily by depressing below this side side direction board 24B held mostly in the horizontal position.

[0018]

[Effect of the Invention]

While the image forming device of the present invention has the function to convey smoothly the decalcomania paper for which transfer was finished to a fixing assembly without spoiling a toner image, The image forming device with which the heat which arises from a fixing assembly or a drive rate is discharged from the device back, and the degree of device internal temperature does not serve as high temperature unusually and which it is stabilized and can be used for a long time will be provided by operating the fan motor for conveyance also as an object for Best.

[Brief Description of the Drawings]

[Drawing 1]

The important section sectional view of an image forming device which established the paper carrying means of the present invention is shown.

[Drawing 2]

The top view of the decalcomania-paper conveying machine of the present invention is shown.

[Drawing 3]

The sectional side elevation of the decalcomania-paper conveying machine of the present invention is shown.

[Description of Notations]

11 ... Photo conductor drum 16 ... Transfer electrode 17 ... Separation electrode 20 ... Decalcomania-paper conveying machine 21 ... Transportation belt 211 ... Smallness hole 22 ... Driving roller 23 ... Driven roller 24A ... The back side direction board 24B ... this side side direction board 241 ... Corded projection part 243A [ 25 / 32 ... Fixing assembly 33 ... Drive motor / ... Box shaped member 26 ... Air intake fan motor ] ... Air intake hole 244A ... Opening hole