JPS6119035B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic transfer type electrophotographic copying apparatus, and in particular, a transfer charger, a paper peeling charger, or both of them can be arbitrarily connected to a photosensitive drum when necessary. By making it possible to separate them, inspection and repair of the inside of the copying apparatus, removal of paper jams near the photosensitive drum, etc. can be easily performed.

Hereinafter, the present invention will be explained based on illustrated embodiments. FIG. 1 is a front view of the main part of the same embodiment, and FIG. 2 is a side sectional view of the main part. In those drawings, 1
1 is a photosensitive drum having a photoconductive layer on its surface, and is rotatably supported by a shaft 2 at a predetermined portion of the main body of the copying apparatus. 3 is located below the photosensitive drum 1 on one end side of the photosensitive drum 1 (the second
The portion 3a located on the right side in the figure is a support member that is pivotably supported by a pin (or spindle) 5 to a support portion 4a provided on the base 4 so as to be rotatable in the vertical direction. Reference numerals 6 and 7 denote a transfer charger and a paper peeling charger respectively mounted on the support member 3 so as to face the surface of the photosensitive drum 1, and these chargers are mounted on the support member 3 so as to face the surface of the photosensitive drum 1. They are arranged parallel to the axis 2 of the. Note that the charger provided on the support member 3 is not limited to the above two chargers, and may be only one of them. Reference numeral 8 denotes a part of the support member 3, more specifically, a part located on the other end side of the photosensitive drum 1, by means of a plurality of pins 9a and 9b serving as guide members, so that the arrow A shown in FIG. and a slide member mounted so as to be movable in the A' direction, that is, in the axial longitudinal direction of the photosensitive drum 1.
Here, the position where the slide member 8 is displaced most to the right in FIG. 2 is referred to as a first position, and the position where the slide member 8 is displaced most to the left is referred to as a second position.

Reference numeral 10 denotes a tension spring mounted between the slide member 8 and a pin 11 implanted in the support member 3 in order to position the slide member 8 in the first position. Reference numeral 12 denotes a handle portion formed in a part of the slide member 8, and this is a portion on which the operator places his/her hand when moving the slide member 8 in the direction of arrow A. 13 is an engaging member attached to the lower part of the slide member 8, and 14 is a holding member such as a fixed cam member fixed on the base 4, which is
In order to hold the support member 3 in a state where the main parts of the chargers 6 and 7 are located at the operating position close to the photosensitive drum 1 with a predetermined gap, the engagement member 13 of the slide member 8 is moved. In order to hold the support member 3 in a state in which the first engaging portion 15a that can be locked and the main portions of the chargers 6 and 7 are located at a non-operating position far apart from the photosensitive drum 1, It has a second engaging portion 15b that can lock the engaging member 13 of the slide member 8.

Next, the handling procedure of this embodiment will be explained.
In the copying operation state, as shown in Figs. 1 and 2,
The engaging member 13 is the first engaging portion 15a of the holding member 14
The chargers 6 and 7 are in the operating position.

Here, if you want to inspect the inside of the copying machine, or if a paper jam occurs near the photosensitive drum and you want to remove it, open the cover (not shown) of the copying machine main body and put your hand on the handle 12. and pull it in the direction of arrow A. At this time, the slide member 8 is moved from the first position to the second position against the tensile force of the tension spring 10, and the engagement member 13 is disengaged from the first engagement portion 15a of the holding member 14. Therefore, when the handle portion 12 is lowered in this state, the support member 3, together with the chargers 6 and 7, the slide member 8, and the engagement member 13, is rotated about the pin 5 as shown by the chain line in FIG. , the engagement member 13 is indicated by arrow B.
As shown, the holding member 14 is located at the second engaging portion 15b along the edge 14a and is stopped. In this case, since the support member 3 moves downward in accordance with its own weight plus the weight of the chargers 6 and 7 and the slide member 8, there is no need to forcefully push down the handle portion 12. Then, in the above state, the handle portion 12
Even if you let go of it, it will remain in the downward motion state. Therefore, the chargers 6 and 7 are brought to the non-operating position, and the separation distance from the photosensitive drum 1 is reduced to the handle portion 12.
The closer it gets, the bigger it gets. This makes it easy to inspect the vicinity of the photosensitive drum and remove paper jams.

To return it to its original position, it is sufficient to simply lift the handle portion 12. That is, when the handle part 12 is lifted,
The engaging member 13 is the second engaging portion 15b of the holding member 14
The edge 14a slides from the edge 14a to the first engaging part 15a, and is further brought to the first engaging part 15a by the tensile force of the tension spring 10, and as shown in FIG. 6 and 7 are locked in the operating position.

As is clear from the above description, the present invention makes it possible to increase the distance between at least one of the transfer charger and the paper peeling charger with respect to the photosensitive drum or to return it to the original state when necessary with a very simple operation. It is very effective for easily inspecting the inside of the copying machine, removing paper jams near the photosensitive drum, etc.

[Brief explanation of the drawing]

Figure 1 is a front view of main parts of one embodiment of the present invention, Figure 2 is a front view of main parts of an embodiment of the present invention;
The figure is a sectional side view of the main part of the same embodiment. 1... Photosensitive drum, 3... Supporting member, 4... Base, 4a... Supporting part, 5... Pin (or spindle), 6... Charger for transfer, 7... Charging for paper peeling. container, 8... slide member, 9a, 9b... pin, 10... tension spring, 12... handle portion, 13
...Engaging member, 14... Holding member, 14a... Edge, 15a... First engaging portion, 15b... Second engaging portion.

Claims (1)

[Claims] 1. At least one of a charger for transfer and a charger for paper peeling is provided, and the main part of the charger is placed in an operating position close to the photosensitive drum and a non-operating position away from the photosensitive drum. a support member rotatably disposed so as to be portable; the support member is equipped to be movable between a first position and a second position;
and a slide member partially provided with an engagement member, a spring member that urges the slide member to move in the direction of the first position, and a support member that holds the support member in a state where the charger is located at the operating position. a first engaging portion capable of locking the engaging member of the sliding member, and a first engaging portion capable of locking the engaging member of the sliding member to hold the support member in a state in which the charger is located in a non-operating position; a holding member having a second engaging portion to obtain the engaging member of the sliding member in a state in which the sliding member is displaced from the first position to the second position against the spring force of the spring member; An electrophotographic copying apparatus characterized in that the charger can be brought from an operating position to a non-operating position by moving the holding member from a first engaging part to a second engaging part. . 2. In the statement of claim 1, the support member is rotatable in the vertical direction below the photosensitive drum by pivoting a portion located on one end side of the photosensitive drum to a base body. consists of
The slide member is attached to a portion of the support member located on the other end side of the photosensitive drum by a guide member so as to be movable in the axial longitudinal direction of the photosensitive drum, and the charger is attached to the support member. An electrophotographic copying apparatus, characterized in that the electrophotographic copying apparatus is disposed above the photosensitive drum so as to face the surface thereof.