JPH0255621U

JPH0255621U -

Info

Publication number: JPH0255621U
Application number: JP13500488U
Authority: JP
Priority date: 1988-10-18
Filing date: 1988-10-18
Publication date: 1990-04-23

Description

[Brief explanation of drawings]

第１図は本考案の実施例の用紙束後端面付近の
構成を示す側面図、第２図は本考案の他の実施例
の用紙束後端面付近の斜視図、第３図は本考案の
目的を達成する他の構成の１例を示す斜視図、第
４図は本考案が適用される給紙トレイの開状態を
示す側面図、第５図はその閉状態を示す断面図で
ある。１……前トレイ、３……後トレイ、７……ワイ
ヤ、１０……底板、１３……用紙束、１４……用
紙束後端面、１５……フオトインタラプタ（凹凸
数計測手段）、１６……等倍センサ（凹凸数計測
手段）、１７……感圧センサ（凹凸数計測手段）
。 FIG. 1 is a side view showing the configuration near the rear end surface of a paper bundle according to an embodiment of the present invention, FIG. 2 is a perspective view of the vicinity of the rear end surface of a paper bundle according to another embodiment of the present invention, and FIG. FIG. 4 is a side view showing an open state of the paper feed tray to which the present invention is applied, and FIG. 5 is a sectional view showing the closed state. DESCRIPTION OF SYMBOLS 1... Front tray, 3... Rear tray, 7... Wire, 10... Bottom plate, 13... Sheet of paper, 14... Rear end surface of paper bundle, 15... Photo interrupter (means for measuring number of unevenness), 16... ...Equivalent size sensor (means for measuring the number of unevenness), 17...Pressure sensor (means for measuring the number of unevenness)
.

Claims

[Claims for Utility Model Registration] (1) A front tray fixed to the main body of a copying machine, and a sliding connecting guide member provided on both sides of the front tray for stacking sheets by sliding them in the paper feeding direction. a rear tray that is movable between a closed position and a pulled-out open position;
a bottom plate made of an elastic plate whose front end is fixed to the top surface of the bottom plate of the front tray and which reaches near the rear end of the rear tray in the open position and forms a horizontal plane; one end is connected to both sides of the rear end of the bottom plate; The wire has its other end fixed to a pulley that rotates in conjunction with the opening/closing movement of the rear tray via an intermediate pulley provided above the front end of the front tray. This causes the bottom plate to curve into a U-shape, making it possible to feed the paper placed on its inner surface, and by extending the wire in the open state, it becomes possible to supply paper onto the bottom plate stretched out in a horizontal plane. In a paper feed tray of a copying machine, the method includes means for measuring the number of irregularities on a rear end surface that is inclined with respect to the paper surface of a stack of sheets placed on a bottom plate bent in a U shape when the rear tray is in a closed position. A paper feed tray characterized by: (2) Claim 1, wherein the means for measuring the number of irregularities on the rear end surface of the paper bundle has a photointerrupter capable of scanning the rear end surface of the paper bundle in an oblique direction.
Paper tray as described in . (3) The above-mentioned means for measuring the number of irregularities on the rear end surface of the paper bundle is
2. The paper feed tray according to claim 1, further comprising an optical sensor that reads the brightness and darkness of each part of the inclined rear end surface of the paper bundle over the entire thickness in the direction of inclination.