JPH04168436A - Manuscript table device - Google Patents

Abstract

PURPOSE:To prevent the slippage, flying, folding of a manuscript by sending a wind onto a manuscript table surface at the time of opening and closing a manuscript table cover. CONSTITUTION:A copying machine body 1, a manuscript table glass 2, hinge parts 3-7 of a manuscript table device, and a manuscript cover 8 are provided, and the cover 8 is provided with a number of fine holes 9 for pressing a manuscript 10. The manuscript 10 is placed on the table, and the manuscript table cover 8 is closed followed by copying, and when the manuscript table cover 8 is opened after the completion, the air collected in a bellows pump 14 is pushed onto the manuscript 10, and the flying of the manuscript 10 is prevented by the air pressure. According to this system, the scattering of the manuscript caused at the time of suddenly opening and closing the manuscript table cover 8 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a document table device of an image forming apparatus using, for example, an electrophotographic method.

[Prior Art] Conventionally, in the document table device of an electrophotographic copying machine, there have been methods to prevent the misalignment of the document when the cover of the document table is opened and closed, such as by attracting the document table cover to the lid when the document table cover is opened and closed, and by charging the document table. configured to prevent

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, misalignment, flying, bending, etc. were often observed due to space restrictions such as wind pressure generated during opening and closing of the document table.

Particularly in the case of curled originals such as FAX paper, folded originals, thin paper, etc., the original may be misaligned during the operation of closing the original pressing plate after setting the original. Also,
When opening the document table cover, the document would fly out due to space constraints.

The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a document table device that allows a document to be brought into close contact with the document table when the document table cover is opened and closed.

[Means for Solving the Problems (and Effects)] According to the present invention, the document table device prevents the document from shifting or flying when opening and closing the document table cover by blowing air at will, improving operability. It was designed so that

[Embodiment 1] FIG. 1 is a sectional view of a document table device according to the present invention, and FIG. 3 is a perspective view of the document table device according to the present invention.

In Fig. 1, l is the main body of the copying machine, 2 is the original platen glass, 3 to 7 are the hinge parts of the original platen device, and 8 is the original platen cover with many small holes 9 for holding the original 10, etc. It is. (See Figure 2). This time, we set up the original 10, closed the original table cover 8, made a copy, and when the original table cover 8 was opened after finishing, the air accumulated in the bellows pump 14 was pushed out to the original 10, and the air pressure caused the original to be copied. Prevents 10 jumps. This method can prevent the document from scattering when the document table cover is suddenly opened and closed.

[Embodiment 2] FIG. 3 is a sectional view of a document table device according to a second embodiment of the present invention, and FIG. 4 is a perspective view of a document table device according to a second embodiment of the present invention. The configuration is basically the same as that of the first embodiment, but by using the exhaust device 12 and exhausting air through the exhaust pipe 13 instead of the bellows pump 14, space saving and simplicity are achieved. Improved operability.

[Example 3] The document table device according to the present invention described above sends air when the document table cover is opened, but if air is sucked in from the same vent hole when the document table cover is completely closed, the document will flow through the document table cover. This makes it possible to prevent the document from slipping.

[Effects of the Invention] As described above, by providing the document table device with a structure that sends air when opening and closing, there is an effect of preventing the document from shifting, flying, or folding due to space constraints.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the document table device according to the present invention, FIG. 2 is a perspective view of the document table device according to the present invention, FIG. 3 is a cross-sectional view of another embodiment of the document table device according to the present invention, and FIG. FIG. 3 is a perspective view of another embodiment of the document table device according to the present invention.

Claims (1)

[Claims] (1) In a document table device that has a document table cover that can be opened and closed freely with respect to the document table surface, and in which the document table cover is closed and the placed original is pressed against the top surface of the document table on which the document is placed, A document table device characterized by blowing air onto the document table surface when opening and closing.