JPS60258566A - Copying machine - Google Patents

Abstract

PURPOSE:To form wide space in case of jam or the like to make it easy to take out jam paper by joining a transfer means and a transfer paper feeding means into one body as a transfer paper carrying unit and constituting this unit so that it can be turned with a part distant from the transfer means as the fulcrum. CONSTITUTION:In case of necessity or the occurrence of jam of transfer papers, an operation lever is operated to turn a turning shaft 12, and a cam lever 13 fixed to the turning shaft 12 is inclined to turn the whole of a carrying unit 7 as a shaft 9' as the center by gravity. As the result, a wide space is formed between the carrying unit 7, a drum 1, etc., and jam papers 20 are taken out easily through this space. When the cam lever 13 is stood up, the carrying unit 7 is raised to a prescribed position against gravity and is held in a prescribed state where a projecting part 16 of a side plate 6 is brought into contact with a position control member 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine having an improved transfer paper transport system.

Generally, in the transfer paper transport path of a copying machine, the transferred transfer paper often becomes jammed (so-called paper jam), and in this case, the jammed transfer paper (hereinafter referred to as "jammed paper")
That's what it means. ) needs to be removed.

Conventionally, in order to make it possible to remove and discharge this jammed paper, a guide plate forming a transfer paper conveyance path is retracted from its guide position, but with such a method, the space formed by retracting the guide plate is narrow. Therefore, it is difficult to insert a hand to pull out the jammed paper, and at the same time there is a risk of damaging other nearby parts.

The present invention has been made to eliminate the above-mentioned drawbacks, and provides a copying machine equipped with a transfer paper conveying device that can create a wide space for removing jammed paper when a jam trouble occurs. .

An example of implementing the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a photosensitive drum, which is rotated in the direction of the arrow, charged by a charging electrode (not shown), exposed to light, and an electrostatic latent image formed by this is developed by a developing device (not shown) to form a toner. An image is formed. In the present invention, in the area where the toner image on the drum 1 is to be transferred to the transfer paper, the drum 1 is located in the area where the toner image on the drum 1 is to be transferred to the transfer paper, when viewed from the conveyance direction of the transfer paper fed from the paper feed section of the copying machine as shown by arrow A. A guide plate 2 for guiding the toner image into contact with the surface of the drum 1, a transfer pole 3 for transferring the toner image onto the transfer paper, and a first removal electrode 4 for subsequently separating the transfer paper from the surface of the drum 1.
The transfer paper transport mechanism 5 provided on the downstream side thereof is assembled in this order into a pair of opposing side plates 6 to form an integrated transport unit 7. The transfer pole 3 and the first removal electrode 4 can be attached and detached via guide means such as rails (no symbol #) provided between the side plates. Also, as shown in the figure, the conveyance path created from the left end of the guide plate 2 to the transfer paper feeding mechanism 5 is ha! It was configured to be horizontal. 1st
The removal electrode 4 is particularly useful when using thin transfer paper. It consists of a roller group including a drive roller 9 on which a rubber belt 8 is mounted, and a suction box 10 for sucking the transfer paper placed on the rubber belt 8 on the upper m1 movement path. The shaft 9/ of the drive roller 9, which is located at one end of the conveyance unit 7, that is, the upper part on the downstream side and protrudes from the outer surface of the side plate 6, is connected to the frame side plate 11 of the copying machine.
The entire transport unit 7 is pivoted to the shaft 9I.
It is supported so that it can rotate freely around. Further, a rotary shaft 12 is rotatably provided on the machine frame side plate J1 at a position below the conveyance unit 7 and shifted to the left with respect to the center of the drum. The cam lever 13 (
a support member 15 having a plate spring 14 fixed thereon (push-up means) and positioned directly above the cam lever 13;
is fixed to the lower edge of the side plate 6, and by raising the cam lever 13, the conveying unit 7 can be raised to a predetermined position against gravity. A control lever (not shown) is fixedly installed. On the other hand, the side plate 6 is formed with a protrusion 16 that protrudes upward at the end of the conveyance unit on the upstream side of the conveyance unit 7, that is, on the opposite side from the transfer sheet feeding position.
A position regulating member 17 with which the upper end surface is abutted is arranged on both sides of the machine frame side plate 11. Then, when the cam lever 13 is in an upwardly erect state, the protrusion 16 comes into contact with the position regulating member 17, the leaf spring 14 is slightly displaced, and the transport unit 7 is supported in a fixed state by the cam lever 13 via the support member 15. Do it like this. As is clear from the figure, the length from the transfer electrode 3 to the rotation fulcrum, ie, the shaft 91, is longer than the length from the electrode 3 to the retaining portion, ie, the protrusion 16. In other words, since the shaft 9/ is located at a distance from the drum, a large space can be created when the unit falls; This means that it can be set to .

Note that it is preferable that a spring is provided on the rotation shaft 12 so that the cam lever 13 is restrained in an upright state. 18 is a second static elimination shuttle that removes the residual charge on the drum 1;
Reference numeral 19 denotes an upper guide plate fixed to the position regulating member 17.

In the copying machine of the present invention, since the transfer paper conveying device is configured as described above, when necessary or when a jam occurs in the transfer paper, the rotating shaft can be moved via the operation lever against the spring if there is a spring. 12 and tilt the cam lever 13 as shown in FIG. 2, the entire conveying unit 7 rotates about the shaft 91 due to gravity. As a result, a wide space can be formed between the conveyance unit 7 and the drum 1, etc., and the jammed paper portion can be taken out and removed very easily through this space.

Note that it is of course possible to provide an independent pivot shaft without using the shaft 91 also.

Further, in the present invention, the above-mentioned dropping and rotation of the transport unit 7 and its return can be performed only by operating the operating lever, and when the transport unit 7 is returned, the protrusion 16 of the side plate 6 is always kept in position by the restraining force of the leaf spring 14. Since the transport unit 7 is maintained in a state in contact with the side member 17, the transport unit 7 can be set in a predetermined shape ρ (j, and therefore the transfer pole 3 whose distance from the drum 1 is strictly determined is It is possible to keep each part, including the parts, in the optimum state at all times.

As described above, according to the present invention, with an extremely simple configuration,
The entire conveyance unit can be evacuated to form a wide space, jammed paper can be easily removed, and even when restored, the optimum state is always reproduced, and other great benefits can be obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view of a copying machine according to the present invention, particularly the transfer paper conveying device portion, and FIG. 2 is an explanatory side view of its operation. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... Guide plate, 3... Transfer pole, 4... First removal electrode, 5... Transfer paper feed structure, 6
... Side plate, 7... Transfer unit, 11... Machine frame side plate, 12... Rotating shaft, 13... Cam lever, 14...
...Plate spring, 16...Protrusion, 17...Position regulating portion, 18...Second removal electrode, addition...Jam paper. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A transfer paper conveying unit integrally provided with a transfer means and a transfer paper feeding means is arranged to sandwich a photosensitive drum when viewed from the vibration direction of the transfer paper, and the transfer means an engaging part provided on the apparatus main body side, which is rotatable about a fast part from the top as a fulcrum, and an engaging part provided on the opposite side of the transfer means from the fulcrum and close to the transfer means; A copying machine characterized in that the position is regulated by engaging with the copying machine. 2. The copying machine according to claim 1, wherein the transfer means and the transfer paper feeding means are arranged in this order when viewed from the conveyance direction of the transfer paper. 3. The copying machine according to claim 1 or 2, wherein the transfer paper feeding means includes a belt and a suction means for tightening the transfer paper onto the belt.