JPS59202469A - Device for positioning original in copying machine - Google Patents

Abstract

PURPOSE:To easily accord the centerline of an original in the width direction with the central axis of an original platen by forming a plate-like positioning member on the platen. CONSTITUTION:An original positioning device consists of a plate-like positioning member 5 slidable forward and backward and located on this half side of the central axis 4 of an original platen 3, and a fixed plate-like member 6 located on the other half. The rear end of the member 5 is provided with a stepwise positioning part consisting of the positioning stoppers 7, 8 for positioning the forward and side ends of an original in accordance with each paper size of the original. An engaging groove 9 is formed at the left end of the member 5, and it is engaged with a spring clip 10 to accord the stopper 7 with the line 11 for positioning the forward end of the original. The member 6 is rectangular, and its rear end is positioned at the line 11. The left end of the member 6 contacts with the right end of the member 5 and permits the member 5 to move in parallel to the central axis 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a positioning device for a document placed on a document table of a copying machine, and in particular, the present invention relates to a positioning device for a document placed on a document table of a copying machine. The present invention relates to a document positioning device that can be adjusted to

[Prior art]

2. Description of the Related Art Conventionally, corner registration and center registration methods are known as methods for positioning a document placed on a document table of a copying machine.

The former corner registration method uses the first
As shown in the figure, this method positions the front edge and side edges of the original by abutting them against a part of the corner on the original stand (1), which has the advantage of making it easy to set the original. The position of the center line in the width direction of the original on the document holder (1) differs depending on each paper size, and when exposing the original with an exposure lamp, the optical axis shifts, so the amount of light corresponds to each paper size of the original. The distribution correction and light shielding methods are complicated, and the position of the center line in the width direction of each copy paper on the paper feeder is also shifted by °C depending on the paper size of the original, making the arrangement of the paper ejection roller that feeds the copy paper complicated. As a result, the cost of the copying machine becomes high.

The latter center registration method is
As shown in Figure 2, this method aligns the center line in the width direction of the document placed on the document platform (1) with the central axis of the document platform (2), and each sheet of the document Even if the sizes are different, the positions of the center lines in the width direction of each document on the document tray (1) are aligned, so the mechanism of the copying machine's optical system and copy paper feeding system is simpler than the corner registration method described above. Although it has some advantages, on the other hand, the document stand (
1) It has the disadvantage that it is difficult to set the original on top.

[Purpose of the invention]

The present invention eliminates and improves these drawbacks of the prior art.
An object of the present invention is to provide a center registration type document positioning device that can easily align the widthwise center line of a document with the center axis of a document table.

[Structure of the invention]

The document positioning device of the present invention has a document positioning table on the top surface of the machine.
The present invention is characterized in that a plate-shaped positioning member is provided to align the widthwise center line of the document with the central axis of the document table.

That is, the present invention provides a plate-like positioning member for positioning the center line in the width direction of the document placed on the top surface of the document table on the document table on the top surface of the machine by aligning the central axis of the document table. At least the portion of the aligning member located above or below the central axis of the document tray is formed to be slidable in the front and back direction, and the rear end of this slidable aligning member is provided with a portion that is positioned on the upper or lower half side of the central axis of the document tray. forming step-like positioning sections each consisting of a document leading edge stop section and a document side edge stop section for positioning the front edge and side edges of the document;
Furthermore, the sliding positioning member is provided with a locking portion for aligning each document leading edge stop portion of the positioning portion onto the document leading edge positioning screw, so that the position of the center line in the width direction of the document can be adjusted to the document table. This makes it possible to easily align it with the central axis.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows a perspective explanatory view of the document positioning device of the present invention.
4) A plate-shaped alignment member (5) provided slidably in the front-rear direction on the lower half side, and a plate-like alignment member (5) provided on the upper half side of the central axis (4) of the document tray and outside the front end of the document tray. It is composed of a plate-shaped positioning member (6) fixed to the portion located at the position.

At the rear end of the slidable positioning member (5), there is a document leading edge stop portion (7) for positioning the front edge and side edges of the document according to each paper size of the document. Step-like positioning portions consisting of side edge stops g are formed, and a locking groove (9) is formed at the left end of the positioning member (5), which is fixed on the upper surface of the fuselage. The document front edge stop portions (7) of the positioning portions are engaged with the spring clips ◇Q held in the positioning portions, respectively, to align the document leading edge positioning lines αη located at the front end of the document table.

- The fixed positioning member (6) is formed in a rectangular shape, and its rear end is connected to the document leading edge positioning heddle.
The left end of the alignment member (6) is located above the alignment member (5) and interacts with the alignment member (5) to facilitate positioning of the front edge of the document.
The positioning member (5) comes into contact with the right end of the document table and acts to move parallel to the central axis (4) of the document table.

In order to set a document on the original device stand using the document positioning device of the present invention, as shown in FIG.
First, the alignment member (5) is slid to align the portion of the document leading edge stop portion (7) that corresponds to A-4 on the document leading edge positioning line αη. Next, the front edge and side edges of the original (b) are moved to the original leading edge stop part (7) of the alignment member (5'').
and the document side edge stop portion (88) to position them together.

In this embodiment, the slidable positioning member is provided on the lower half side of the central axis of the original table stand, but it may be provided on the lower half side, or as shown in FIG. The alignment members on the lower half side and the lower half side of the central shaft (4) are integrated into an alignment member (G), and the rear end (-
Alternatively, the positioning portion α1 may be formed with a left-right symmetrical shape around the center axis (4) of the document table, and the entire positioning member α1 may be slidable in the front-rear direction.

〔Effect of the invention〕

Since the present invention has the above configuration, it has remarkable effects as shown below.

First, by the action of the locking part on the alignment member, when moving the alignment member according to each paper size (-) of the original, the leading edge stop part of the original corresponding to that original size is placed on the document leading edge positioning line. To set the original on the original table, align the front edge and side edges of the original with the original leading edge stop and the original side edge stop of the alignment member. It is extremely convenient because you can set the original in the correct position by simply aligning it with the center line of the original in the width direction.Moreover, since the center line in the width direction of the original is aligned with the center axis of the original table, the optical system of the copying machine and the mechanism of the copy paper feeding system are very convenient. The practical effects of the present invention are great, such as simplicity.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of a conventional document positioning method, FIGS. 3 and 4 are explanatory diagrams of one embodiment of the present invention, and FIG. 5 is an explanatory diagram of another embodiment. Show the diagram. Code explanation +1) +3)...Original stand +2) (4)・
・・・・・・Document stand center axis (51(6)o3・・・・
・Positioning member (7)...--Document leading edge stop (
8)...Document side edge stop (9)...Latching groove V...Spring clip α furnace...
...Document leading edge positioning line (b)...Document C141...
Positioning part Fig. 1 Fig. 2/2 Fig. 3 Fig. 4

Claims (1)

[Claims] A plate-shaped positioning member is provided on the document table on the top surface of the machine to align the center line in the width direction of the document placed on the top surface with the central axis of the document table. The part located on the upper or lower half side of the center axis of the stand is formed to be slidable in the front and back direction, and the rear end of this slidable positioning member is provided with a position in front of the original according to the paper size of the original. A stepped positioning section is formed, each consisting of a document leading edge stop section and a document side edge stop section for positioning the edges and side line sections, and the q! of the positioning section is formed. (r) A document positioning device for a copying machine, characterized in that the slidable positioning member is provided with locking portions for respectively aligning the leading edge stop portions of the document on the document leading edge positioning line.