JPS5829501B2 - Hard type document holding plate for copying machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document holding plate in a copying machine, and more particularly to a document holding plate that can be used for partially opening/closing or fully opening/closing.

Conventionally, this type of document holding plate has been constructed such that the thickness of the rear region of the document holding plate 3 is made thinner or a groove is simply provided so that the holding plate can be folded in half, as shown in FIG. 7, for example. What has been done is known.

However, with the conventional two-fold type, the document holding plate must be opened and closed in the direction of exposure scanning, that is, in the longitudinal direction of the transparent glass plate for exposure, and this does not make it difficult to open and close the entire document. It is necessary to take into consideration the thickness of the bent portion and the strength of the bending portion, and therefore it is difficult to open/close partially and fully open/close, respectively.

It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide a hard-type document holding plate that is extremely easy to operate both partially and completely.

The present invention will be explained below with reference to the illustrated embodiments.

The document holding plate 10 of the present invention is divided into two or more holding plates.

For example, as can be seen from FIGS. 1 and 2, it is divided into a front presser plate 11 and a rear presser plate 12 in the exposure scanning direction. It is pivotally connected to an opening/closing shaft 4 running along the long edge of the plate 2.

The document holding plate 10 is divided so that the dividing line 15 is parallel to the short side of the glass plate 2, but depending on the circumstances, it may be divided so that the dividing line 15 crosses the long side of the glass obliquely.

A portion 11a of the edge of the front presser plate 11 on the dividing line side extends beyond the dividing line 15 and above the rear presser plate 12.

Corresponding to the thickness and shape of the extending portion 11a of the front presser plate 11, a stepped portion 1 is formed on the edge of the rear presser plate 12 on the parting line side.
2a is formed.

Therefore, the front presser plate 11 can be opened and closed independently, but the rear presser plate 12 must be integrated with the front presser plate 11 because its stepped portion 12a engages with the extension portion 11a and carries the front presser plate 11 with it. The relationship is such that it cannot be opened or closed.

However, the relationship between the front and rear presser plates is that the extension portion 11
A and the stepped portion 12a can also be obtained by cutting the document holding plate 10 diagonally when viewed in a cross section similar to that shown in FIG.

Reference numerals 13 and 14 denote rubber plates attached to the lower surfaces of each presser plate 11 and 12, respectively, and the two rubber plates have complementary shapes 1, for example, are joined to each other at obliquely cut surfaces 13a and 14a to prevent light from leaking to the outside during exposure. prevent.

With the above structure, when copying a relatively small original, for example, B5 size, it is only necessary to open and close only half of the original holding plate 10, that is, the front holding plate 11.

Since the gripping portion 11b of the presser plate 11 is on the near side of the operator, it is easier to handle than the conventional two-fold type, and since only the weight of the front presser plate 11 is involved, it is easier to operate.

When the document to be copied is relatively large, for example, B4 size, when the rear presser plate 12 is lifted up with the grip part 12b, the front presser plate 11 is automatically carried along and moves as one, so that it acts as if it were a single document presser plate. It can be operated as easily as opening and closing.

FIG. 4 shows a document presser plate of the present invention which enables copying of thick documents.

The front presser plate 11 and the rear presser plate 12 are pivoted to independent opening/closing shafts 4 a y 4 b, and slide floating plates 5 a and 5 b are attached to the opening/closing shafts 4 a and 4 b, respectively.
is hanging.

Both slide floating plates 5at5b are attached to the machine frame 1' of the copying machine main body 1.
It passes through a guide sheath 6ay6b provided on the lower surface of the guide sheath 6ay6b and hangs down into the machine.

The lower end of the slide flotation plate is branched into two forks, and the guide shafts 7 provided in the sheaths 6at6b are connected between the forks.
a s 7 b is passing.

Therefore, each holding plate 11 and 12 is connected to this slide floating plate 5.
a, 5b and the sheath 6at6b and the guide shafts 7a, 7b can move up and down.

Then lift it further upwards and remove the machine frame 1 along with the slide flotation plate.
It can also be removed from 1.

In this way, the front presser plate 11 can be moved up and down independently, so that it is possible to independently press a small-sized thick original 8 as shown in FIG.

Further, since the carrying mechanism of both presser plates 11 and 12 is not affected in any way, it is possible to press even a large and thick document 9 as shown in FIG.

In the embodiment described above, the document presser plate 10 is divided into two parts, but it can be divided into more parts if necessary.

That is, one or more intermediate presser plates are inserted between both the front and rear presser plates, and the edge of the presser plate located on the front side of these adjacent edges is extended above the edge of the adjacent presser plate located on the rear side. You can force it.

Further, the extending portion 11a may be provided at one location or the entire area of the edge on the parting line side, and the one step portion 12a does not necessarily need to be provided.

It is preferable that each holding plate is provided with a stopper 16 as shown in FIG. 4 to limit the opening/closing angle.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a copying machine equipped with a document presser plate according to the present invention, and FIG. 2 is a plan view of the document presser plate according to the present invention. FIG. 3 is a partial sectional view taken along the line ■-■ in FIG. 2. FIG. 4 is a partial cross-sectional view illustrating the opening/closing mechanism of the document holding plate;
FIGS. 5 and 6 are explanatory diagrams showing a mode in which a thick original is held down, and FIG. 7 is a drawing showing a conventional document holding plate of a two-fold type. 2...Glass plate, 4t4at4b...
Opening/closing axis. 5 a, 5 b...Slide floating board, 6at
6b...sheath? at7b...Guide shaft, 10...Document presser plate, 11...Front side presser plate, 12...Rear side presser plate. 11a...Extended portion, 12a...Stepped portion, 13°14...Rubber plate.

Claims (1)

[Claims] 1. A retractable document holding plate is divided into at least two holding plates, and a part of the edge of one of the holding plates on the dividing line side is extended to the edge force of the other holding plate. A hard type document holding plate for a copying machine characterized by the following features. 2. One presser plate and the other presser plate are each pivoted to independent opening/closing shafts, and a slide floating plate is suspended from each opening/closing shaft and inserted into the machine frame, so that the one presser plate can be moved up and down independently. A document holding plate according to claim 1.