JPS59200273A - Feeding and carrying device of transfer paper - Google Patents

Abstract

PURPOSE:To open and close freely a transfer paper carrying path and make the constitution of a transfer paper carrying device simple and small-sized by shaking selectively a unit consisting of one of a pair of resist rollers, a transfer paper separating device, and the transfer paper carrying device. CONSTITUTION:One of a pair of resist rollers 11, a transfer paper separating device 12, a transfer paper carrying device 15, etc. are constituted into a unit and are shaked selectively to open and close freely the transfer paper carrying path. Further, a roller 27 in the side of the device 12 out of plural rollers is constituted into a tubular roller whose inside is set to a negative pressure by an external negative pressure operating device, and a suction hole 27b for sucking and carrying the transfer paper which is connected to the inside of this roller is provided on the tubular roller. As the result, it is easy to remove a jamming transfer paper, and the device 15 is made simple-constitution and small-sized.

Description

[Detailed description of the invention] (Technical field) The present invention relates to a transfer paper feeding and conveying device for a transfer type copying machine.

(Prior Art) In an example of a transfer type copying machine, a transfer paper is first sent out from a pair of rollers/strollers toward an image carrier at a predetermined timing, and the transferred transfer paper is placed on the image carrier. The toner image is transferred by the corona discharger of the transfer charger, and after the transfer, the transfer paper separated from the image carrier is transported toward the fixing section by a transfer paper transport device such as a transport heald. It has become.

In this 6-rokuyo-sakura system, in the transfer paper conveyance path from the pair of registration rollers to the transfer paper conveyance device, jams may occur in the next transfer paper during conveyance. Conventionally, as shown in Japanese Patent Application Laid-open No. 57-76578 and Japanese Patent Application Laid-Open No. 57-151954,
A technique has been proposed to open the transfer path from the transfer section to the transfer paper conveyance unit, thereby facilitating the removal of jammed/ζ transfer paper. In both of these technologies, the transfer paper guide is not released at the roller/roller pair portion, so the transfer paper is If a jam occurs, it is difficult to remove.

On the other hand, it is well known that in this German copying machine, a vacuum suction type conveyor belt was used as a means to convey the transfer paper toward the fixing section after transfer.
In such a conveying means, since the suction fan is installed in the conveyor belt, the bulk of the device increases.
+11. Since the σ feed heald becomes long, it is not suitable for cases where the transfer paper bus is short.

(Objective) In view of the above-mentioned points, an object of the present invention is to improve the transfer paper conveyance path including the roller/stroller pair portion, and to provide a transfer paper conveyance device k for conveying the transfer paper after transfer to 110. To provide a transfer paper feeding and conveying device that is short-lived and does not become bulky.

(W;N) The structure of the present invention will be explained below based on Examples.

FIG. 1 shows an example of a transfer type copying machine to which the present invention is applied, in which the light surface of a photosensitive tram 1, which is an example of an image carrier, first passes through a charging chip as the drum rotates.・−・・・・２
-1Z electrode is applied by -1Z, and then exposure scanning is performed by the laser writing system 3, and an electrostatically deposited image is formed on the surface of the photoreceptor tram 1.
The toner image is visualized by

On the other hand, from the paper feed section 6, the transfer paper is fed to the pair of strollers 11 while being guided by the pair of bag feed rollers 7 to the double force plates 8 and 9. The transfer paper is designed to temporarily stop at a portion between the roller pair 10 and the roller pair 11. Next, at a predetermined timing, the stroker effect 11 or the rotary ring starts, and the transfer paper is sent out toward the photosensitive drum 1, and the leading edge of the transfer paper touches the toner image on the tram 1. It is designed to meet at an opportune time at the tip.

Next, the toner image is transferred (9) to the transfer paper by the transfer charger 12a of the transfer separation device 12 disposed opposite to the photoconductor drum, and after this transfer, the toner image is transferred to the transfer paper by the separation claw 13 - By cooperation with the jar 12b, the transfer paper is separated from the tram surface and guided by the transfer paper guide 14, so as to advance toward the conveyance belt 16 of the transfer paper conveyance device 15.

The transfer paper transported by the transport belt 16 is fixed by passing through a pair of fixing rollers 17, and thereafter,
The paper passes through a pair of waste paper rollers 18 and is discharged as a copy to the outside of the machine. On the other hand, residual toner on the photoreceptor tram 1 is removed by a cleaning device 19.

Here, in FIG. 2, one of the lower rollers llb of the rollers lla and llb constituting the pair of registration rollers 11 and the unitized transfer separation device 12 are shown.
, transfer paper conveyance device] 5, etc. are integrally installed in the unit IN and the LI board 20 as a unit configuration.

The unit side plate 20 is swingable about the support shaft 21, and is placed in a solid line position during normal operation, and in this state, the transport path pivoted on the pivot 22 is opened and closed... The end of the narrow arm 23a of the unit is engaged with the lower edge of the unit side plate 20.

Opening/closing the building feed passage...-23 (ζ, 24 springs are placed between the stationary member and the 7, due to the elasticity of this spring 24,
A force for rotating the unit side plate 20 in a counterclockwise direction is applied through the sardine part 1 of the narrow arm 23a, and the force is applied to the unit side plate 20 to rotate the unit side plate 11. Due to the elastic action of the elastic force acting on the sweeping proboscis 5 attached to the shaft of b, the roller llb is pressed against the roller lla of the upper a 111J.

Incidentally, in recent years, there has been an increasing demand for the size of the main body of such copying machines to be reduced, and due to this reduction in size, the inside of the copying machine has become extremely congested with various devices. be. In such a situation, the transfer paper transport path is also in a congested state, and if the transfer paper jams in the transfer paper transport path in such a state, the transfer paper It is not easy to remove it from its transport path.

The present invention is one machine+]? The object of the present invention is to make it extremely easy to remove transfer paper on which yam has occurred.

That is, in FIG. 2, when the conveyance path is opened and closed... -23 is rotated clockwise around the pivot shaft 220 against the elasticity of the spring 24 at the imaginary line position, and the lever 23 is properly positioned at this position. It is designed to be click-stopped by forceful means. 1 Due to the rotation of the transfer path opening/closing lever 23, the unit side plate 20 rotates around the pivot 21 by its own weight to the imaginary line position, and in this state, from the transfer/stroller row 11 to the transfer RBa feeding device 15. Transfer paper] The liquid feed path is wide open.

Therefore, 7 stroller pairs 11, transfer portion) & device 1
Even if yam occurs on the transfer paper at any part of the transfer paper, the separation claw 13, or the transfer belt 16, the transfer paper can be easily removed.

1. Since the transfer paper conveyance path is open even at the registration roller pair 11, there is no risk of damaging the surface of the photoreceptor tram 1.

That is, assuming that the registration roller pair 11 is not released, if the unit side plate 20 is forcibly lowered while the transfer paper holder 7 is held in the roller pair 11 IVj, the transfer paper If the leading edge of the transfer paper is caught in the separating claw 13, the transfer paper may be pulled, and there is a risk that the photosensitive drum may be damaged by the separating claw 13 or the like. In the device of the present invention, such female damage is prevented.

By the way, in this type of copying machine, a vacuum suction type conveyance heald is used as a means for conveying the transfer object toward the transfer abutment. In such a conveying means, a suction fan is installed in the one-way feeder.
In addition, as a result of this, the conveyor heald becomes longer, making it unsuitable for transfer paper with a short bus length.

The device of the present invention solves these problems, has a simple configuration, and is designed to be small in size.

Figure 3 (a) shows a cross-sectional view of the transfer paper conveying device 15 shown in Figure 2. It is a tubular roller, and is rotated and driven integrally with the kia 28 via a shaft 29.The conveyance roller 27 is designed to rotate and drive the unino toy disk 20 (
It is supported by the rotary eye on the ill+ receivers 31 and '32 attached to the boards 20A and 23B, respectively.

In addition, (the intrusion roller 27 is made of a molded plastic product) and can therefore be manufactured at a relatively low cost. So, I'm worried about whether or not I'll need a special medium-sized one.

The conveying roller 27 is provided with suction holes 27a at predetermined intervals in the IIIj direction and the circumferential direction for sucking and conveying the transfer paper with air, and the suction holes 27a communicate with the inside of the conveying roller 27. ing. 1, 1 plate feed roller 2
The inside of the suction frame 33 is communicated with the suction frame 33 through the suction hole 27b', and the inside of the suction frame 33 is set to a negative pressure state by a negative pressure operating device (not shown). There is. Therefore, the inside of the conveyance roller 27 is also brought into a negative pressure state, and the transfer paper can be conveyed on the conveyance belt 16 while being suctioned by the suction hole 27a.

According to this transfer paper conveying device, it is possible to keep the inside of the roller in a negative pressure state using the negative pressure actuation device outside the roller.
d. Since the transfer paper suction function is achieved at the suction hole 27a, there is no need to provide a special suction fan or the like inside the device, and the device can be made more compact.

Therefore, the length of the f+iQ transport can be shortened, and the transport time can be further saved when the transfer paper is transported by a basket transport bus or a short knife. Even if yam occurs on the transfer paper in this short transfer paper conveyance path, the above-mentioned trap
By opening the 1nli plate, the jammed transfer paper can be easily taken out.

In addition, by making the +jlν transport belt a heald with a round cross section as shown by reference numeral 16, the connection between the +jlν transport belt and the transport roller 27 is improved.
Since the amount of contact is reduced, even if some toner falls from the photoreceptor 1-ram and adheres to the silent feed roller 27, the amount of this adhered toner that sticks to the heald 16 is small. The dirt on the back side of the transfer paper can be minimized, and the transfer paper transport device can be cleaned easily. It goes without saying that this type of belt can be replaced with a relatively narrow belt-shaped heald of 1J. Best of all, in this embodiment device 6, there is no need to provide suction holes in the conveyor belt.

In the apparatus of this embodiment, the transfer paper can be moved an arbitrary number of times in the direction of the heald 16 or the roller 27 depending on the inside of the transfer paper.

In addition, in this embodiment device, the transfer separation device 12 (second
(See figure) The transport roller 27 that only rotates can be a tubular roller with suction holes, or it can be a transport roller that refuses in the tensioning direction of the heald depending on the transport bus of the transfer paper. A plurality of cylinders may be provided.

By the way, in the embodiment shown in FIG.
(By interposing the knoll material 34 between one side plate 20A of the ill plate 20 and the suction frame 33, the roller 27
and the suction frame 33 are connected to the air chamber, and this 47. Due to this structure, the number of small parts can be extremely reduced. However, in the conventional transfer illumination device 6-, a suction fan is provided inside the conveyor belt or in the space below the plurality of conveyor rollers, and in order to achieve a sealing function, many In the non-embodiment, it is possible to reduce the number of small parts by four parts.

In addition, &, Figure 2 (/C, Uni-no-Toy Yze1] Board 2
0, as well as the various devices attached to it, can be attached to the main body of the copying machine, making maintenance and inspection of the inside of the machine easier.

(Effects) According to the present invention, the transfer paper wrinkle feeding path between the register and the roller pair and the transfer paper transport device that transports the transfer paper after transfer is opened. Because
It is extremely easy to remove jammed transfer paper over the entire transfer paper conveyance path, and the transfer paper conveyance device can be made into an extremely simple 'I'74 configuration, and furthermore, it can be made smaller. .

[Brief explanation of drawings]

Figure 1 shows an outline of a transfer type copying machine to which the present invention is applied (i.←
Fig. 2 is a configuration diagram of the transfer paper feeding and conveying device according to the first embodiment of the present invention, and Fig.
It is a diagram. 1. Photoreceptor drum as an image carrier, 11 registration roller blade, 12 transfer separation device, 15 transfer paper conveyance device,
16・Transportation held, 27・Roller, 27a Suction hole

Claims (1)

[Claims] A pair of registration rollers that feeds a transfer paper at a predetermined timing to an image carrier on which a toner image has been formed, and a pair of registration rollers that are arranged opposite to the image carrier to transfer the toner image to the transfer paper and a transfer paper after the transfer. It is equipped with a transfer separation device that performs separation, and a transfer paper conveyance device that conveys the separated transfer paper to a fixing unit using a conveying heald stretched between a plurality of rollers, and one roller of the pair of paper/stroke rollers. , - The transfer separation device, the transfer paper conveyance device, etc. are formed into unit stripes, and by selectively swinging this unit, the transfer paper (; the transfer path can be freely opened and closed, and the plurality of rollers are At least,
The roller on the side of the transfer separation device is a tubular roller that is brought into a negative pressure state by a negative pressure operating device inside or outside the roller, and a suction hole for suctioning and conveying the transfer paper that moves slowly inside the tubular roller is formed. A transfer paper feeding and conveying device characterized by being provided.