JPS6212512B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a copying machine.

Generally, in the transfer paper conveyance path of a recording device, 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") is Needs to be removed.

Conventionally, in order to make it possible to remove and discharge this jam paper, a guide plate forming a transfer paper conveyance path is retracted from its guide position, but in such a method, the space formed by the retraction of the guide plate is It has disadvantages such as being narrow, making it difficult to insert your hand and pulling out the jam 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 that can provide a large space for removing jammed paper when a jamming problem 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 transfer drum, which is rotated in the direction of the arrow, charged by a charging electrode (not shown), and then exposed to light on the original image.The electrostatic latent image thus formed is developed by a developing device (not shown). A toner 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 arrow A
As shown in , there is a guide plate 2 that guides the transferred transfer paper so that it comes into contact with the drum 1, a transfer pole 3 that transfers the toner image onto the transfer paper, and a subsequent transfer paper that is separated from the surface of the drum 1. Therefore, when viewed from the moving direction of the first removal electrode 4 and the transfer paper, the transfer pole 3
The four parts of the transfer paper feed mechanism 5 provided on the downstream side of the transfer paper feed mechanism 5 are assembled into a pair of opposing side plates 6 to form an integrated conveyance unit 7. The transfer paper feeding mechanism 5 includes:
In the illustrated example, a rubber belt 8 is moved along a moving path including a flat top moving path, a roller group including a drive roller 9 on which this rubber belt 8 is mounted, and a roller group located on the rubber belt 8 on the top moving path. It consists of a suction box 10 for suctioning the transfer paper. 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 pivotally supported by the side plate 11 of the machine frame of the recording apparatus. 7 is supported rotatably around the shaft 9'. Further, a rotating shaft 12 is rotatably provided on the machine frame side plate 11 below the transport unit 7, and a cam lever 13 that projects outward is fixed to this rotating shaft 12. A support member 15 having a leaf spring 14 is fixed to the lower edge of the side plate 6 so as to be located directly above, and the cam lever 13 is raised to raise the conveyor unit 7.
can be raised to a predetermined position against gravity, and an operating lever (not shown) is fixed to the end of the rotating shaft 12. On the other hand, the side plate 6 has
A protrusion 16 that protrudes upward is formed on the upstream side of the conveyance unit 7, that is, at the end of the conveyance unit opposite to the transfer paper feeding mechanism, and a position regulating member 17 is formed with which the upper end surface of this protrusion 16 comes into contact. is fixed to the machine frame side plate 11. and the cam lever 13
In the state in which the conveyance unit 7 is raised upward, the protrusion 16 abuts against the position regulating member 17, and the plate spring 14 is slightly displaced so that the conveyance unit 7 is supported in a fixed state by the cam lever 13 via the support member 15.

Incidentally, it is preferable that the rotation shaft 12 is provided with a spring so that the cam lever 13 is restrained in an upright state. Reference numeral 18 indicates a second removal electrode for removing residual charges on the drum 1, and reference numeral 19 indicates an upper guide plate fixed to the position regulating member 17.

Since the copying machine of the present invention has the above configuration,
When necessary or when the transfer paper jams,
When the rotating shaft 12 is rotated via the operating lever against the spring force if there is a spring, and the cam lever 13 is tilted as shown in FIG. 2, the entire conveying unit 7 is centered around the shaft 9'. Rotates due to gravity. As a result, a wide space can be formed between the conveyance unit 7 and the drum 1 etc., and the jam paper 20 can be taken out extremely easily through this space.
Can be removed.

Of course, an independent pivot shaft can be provided without also using the shaft 9'.

In addition, in the present invention, the above-mentioned dropping rotation and return of the transport unit 7 can be performed only by operating the operating lever, and when the transfer unit 7 is returned, the leaf spring 1
4, the protrusion 16 of the side plate 6 is always maintained in a state in which it is in contact with the position regulating member 17, so that the conveying unit 7 can be kept in a predetermined state, and therefore the relationship between the drum 1 and the drum 1 can be maintained. Each part, including the transfer pole 3 whose separation distance is strictly determined, can always be kept in an optimal state.

As described above, the transfer paper conveyance device of the recording apparatus of the present invention has an extremely simple configuration, and the entire conveyance unit can be retracted to form a wide space, making it easy to remove jam paper.
Moreover, even when restored, the optimum state is always reproduced, and other great benefits can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view for explaining the copying machine of the present invention, and FIG. 2 is a side view for explaining its operation. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... Guide plate, 3... Transfer pole, 4... First removal electrode, 5... Transfer paper feeding mechanism, 6... Side plate, 7... Conveyance unit, 11...
Machine frame side plate, 12... Rotating shaft, 13... Cam lever, 14... Leaf spring, 16... Projection, 17... Position regulating member, 18... Second removal electrode, 20... Jam paper.

Claims (1)

[Claims] 1. One guide member for directing the transfer paper sent from the transfer paper supply section toward the transfer drum, a transfer electrode for transferring the toner image formed on the transfer drum onto the transfer paper, and a transfer process. A unit including, in this order, a transfer paper feeding device for transporting the transfer paper after passing through is provided so as to be rotatable using the end on the side where the transfer paper feeding device is located, and a A movable operating member is provided below the unit so as to be able to take a first position in a state and a second position in an operating state, and further, the movable operating member is configured to transmit the kinetic force by the movable operating member to the unit via an elastic member. an elastic member is exposed between the unit and the movable operating member, and an engaging portion is formed on a portion of the other end of the unit so as to cooperate with an engaging portion provided on the device main body side;
When the unit in the first position is moved toward the second position by the operation member, the elasticity of the elastic member and the engagement action of both the engaging parts regulate the position of the unit and hold it in a fixed state. A copying machine characterized by having a mechanism configured to perform the following operations.