JPH0458550U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a plan view of the paper positioning device of the present invention;
FIG. 2 is an explanatory diagram of the stopped state of the paper by the paper positioning device of the present invention. FIG. 2a shows the case where the paper is being fed diagonally, FIG. The figure is an explanatory diagram of an image forming apparatus to which the present invention is applied, FIG. 4 is a side view showing the configuration of the guide plate in the paper positioning device, and FIG. 5 is a side view of the lower guide plate corresponding to FIG. 4. 6 is a side view of a general paper positioning device, FIG. 7 is a plan view showing the relationship between rollers and gates in a conventional paper positioning device, and FIG. 8 is a side view of a conventional paper positioning device. FIG. 9 is an explanatory diagram for stopping weak paper, FIG. 9 is an explanatory diagram for the case where the paper is being fed diagonally, and FIG. 10 is an explanatory diagram for the case where the leading edge of the paper is caught in the gate device. Symbols in the figure: 1...Photoconductor, 2...Image transfer section, 5...Manual feed tray, 8...Paper transport path, 10
... Paper positioning device, 11 ... Upper guide plate, 1
5... Lower guide plate, 16... Hole, 17... Upper folding portion, 20... Gate device, 22-28... Gate claw, 30... Registration roller device, 32-35... Roller member, 40... Slits roller device, 42~
45...Feed roller.

Claims (1)

[Claims for Utility Model Registration] (1) With respect to a paper transport path disposed between a paper feeding device and an image transfer section from an image carrier, a paper positioning device is disposed immediately before the image transfer section. , a device configured to position the leading end of the paper by the paper positioning device, match the timing with the toner image formed on the image carrier, and send out the paper with the side surface aligned with a reference line, The positioning device includes a gate device provided with a plurality of gate claws, a registration roller device provided with a plurality of roller members, and a slip roller device that performs a feeding action on the paper stopped by the gate device, The image forming apparatus is characterized in that the gate device is configured such that the gate claws are located on both sides of the roller member, and the feed roller of the slit roller device is arranged in correspondence with the gate claws. Paper transport device. (2) The feed roller at the end of the slit roller device on the reference line side is arranged at a position corresponding to the gate located inside the roller at the end of the registration roller device on the reference line side, and the other feed rollers 2. A paper conveyance device for an image forming apparatus according to claim 1, wherein the paper conveyance device is arranged at positions corresponding to gate claws arranged on the reference line side with respect to other rollers. (3) A part where the paper positioning device is arranged,
A hole corresponding to the roller member and two gate pawls is provided in the lower guide plate, and a member bent upward is provided in the lower guide plate upstream of the hole, and the tip of the upper folded portion is attached to the upper guide plate. A paper conveyance device for an image forming apparatus according to claim 1 or 2, characterized in that the paper conveyance device of an image forming apparatus is arranged in such a manner that the paper conveyance path is narrowed.