JPH0614548Y2 - Document reader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a document reading apparatus applied to, for example, a facsimile or a copying machine, and more particularly to improvement of a document tray portion.

[Conventional technology]

2. Description of the Related Art In a facsimile, a copying machine or the like, a document tray is used to guide a document to a document insertion port when the document is read while being fed by a roller or the like in a main body case. Since there are various sizes of documents, a guide mechanism that can adjust the width according to the paper width of the document is provided on the document guide surface of the document tray or the main body case, and by operating this guide mechanism, The center of the document (center position in the width direction) is designed to match the reading center of the document.

A conventional guide mechanism includes, for example, a pair of left and right document guide members that are movable in the width direction of a document, a pair of racks provided on the back side of a document guide surface and moving integrally with the document guide member, and both racks. A pair of left and right document guide members move in synchronism with each other in a direction in which they approach and separate (a document width direction).

[Problems to be solved by the invention]

The conventional guide mechanism described above can freely change the distance between the guide members according to the width of the document, but
There is a problem that the structure is complicated, the tray is thick and heavy, and the number of parts is large. Further, when the difference in the paper width is about several mm like the so-called A4 size and the letter size, it may take time and effort to set the document guide at an accurate position.

Therefore, in the conventional document tray, when the type of document size to be used is specified to some extent, it may be difficult to handle even though the guide mechanism is complicated.

Therefore, an object of the present invention is to easily set the center of a plurality of types of originals to the reading center of the original reading device by using the original tray having a simple structure when the type of the original size to be used is specified to some extent. And to be able to match accurately.

[Means for solving problems]

INDUSTRIAL APPLICABILITY The present invention is applied to a document reading device provided with a main body case that incorporates a document reading unit that reads a document while feeding it, and a document tray provided at a document insertion port of the main body case.

In the present invention, the document tray is detachably attached to the main body case by providing the document insertion port with the insertion hole for attaching the document tray and the document tray with the support portion inserted into the insertion hole. To do so. An original guide is provided on one side of the original tray to allow one side edge of the original to slide. The opening width of the insertion hole is set to a size that allows the support portion to be moved in the width direction of the document tray. Further, at least two recesses are provided at positions where the insertion hole and the support portion are fitted to each other on one side of the insertion hole and the support portion at positions separated from each other in the same direction as the width direction of the document tray. With
On the other side, there is provided a convex portion that can be fitted into the two concave portions and can be fitted into either one of the two concave portions depending on the size of the original. And the above-mentioned one concave portion,
When the convex portion is fitted in the concave portion, it is provided at a position where the distance from the document guide to the reading center of the document becomes half the paper width of the first document size. The other concave portion is located at a position such that the distance from the document guide to the reading center of the document becomes one half of the width of the second document size when the convex part is fitted in the recess. It is provided.

[Action]

In the document reading device having the above structure, the document placed on the document tray is introduced into the document insertion slot while sliding on the tray, and is read by the reading means while being conveyed by the rotation of the feed roller or the like. When the document tray is attached to the main body case and the document size is relatively large such as so-called letter size, the convex portion is fitted into the first concave portion to align the center of the document with the reading center. . In the case of a slightly smaller original size such as A4 size, the center of the original is aligned with the reading center by fitting the convex portion into the second concave portion.

As described above, in the present invention, the document on the tray is manually moved to the document guide side, and the document is fed along the document guide to the document insertion port while one side edge of the document is in contact with the document guide. Thus, the original is read in a state where the center of the original coincides with the reading center of the reading device.

In this way, by simply selecting the fitting position of the convex portion and the concave portion according to the document width, the centering of the document can be performed very easily. Moreover, unlike the conventional guide mechanism, it is not necessary to use a plurality of guide members, racks, gears, and the like, and the structure is simple, and no extra parts other than the document tray are required.

〔Example〕

The document reading device 1 shown in the drawing is an example applied to a facsimile with a handset. That is, inside the main body case 2 made of synthetic resin, a document feeding means using rollers and a document reading means (not shown) using a light source and an optical sensor are built in, and the content of the read document is read. Well-known electric circuits are provided for transmitting the data through a telephone network. Further, a printing means having a head for printing the received characters and figures on the recording paper is built in. A handset 3 having a telephone function is provided on the side of the body case 2. Various operation keys 4 are provided on the operation panel portion of the main body case 2. The document feeding means, the reading means, and the printing means may be the same as conventional ones.

A line segment C in FIG. 1 indicates the reading center of the original document by the reading means. When the reading center C and the center of the original document coincide with each other, the original document is not biasedly read and is read at the central position of the reading means. Read.

As shown in FIGS. 3 and 4, a horizontally long document insertion slot 6 is formed on the rear surface side of the main body case 2. The document tray 8 is detachably attached using a pair of left and right insertion holes 7 provided in the wall portion 6a on the lower surface side of the document insertion opening 6. The original tray 8 is an integrally molded product of transparent synthetic resin, and has the insertion hole 7
A pair of support portions 9 that can be inserted into the insertion holes 7 are provided at the positions corresponding to. Further, a document guide 11 protruding to the upper surface side is provided on one side portion (the left end when viewed from the front) of the document tray 8. This manuscript guide 11
Has a function of aligning the originals inserted in the original insertion opening 6 on one side (left end).

A convex portion 12 is provided on the rear side of the support portion 9 at the fitting portion between the insertion hole 7 and the support portion 9. Further, at the rear edge of the insertion hole 7, there are provided two portions 13 and 14 at which the convex portion 12 can be fitted. These recesses 13, 14
Are separated from each other in the lateral direction (width direction of the document), and the distance m (see FIG. 5) between the concave portions 13 and 14 is, for example, 3 mm.

As shown in FIG. 5 and the like, the opening width of the insertion hole 7 is set to a size that allows the support portion 9 to be moved to some extent in the width direction of the document tray (vertical direction in FIG. 5).

More specifically, as shown in FIGS. 6 and 7, the support portion 9 is formed in a hook shape having a step portion 16, and the tip portion 16a thereof is the front edge portion 7a of the insertion hole 7. By contacting the document guide 11 from below,
It is supported diagonally to prevent it from falling.

Then, the first concave portion 13 has the above-mentioned convex portion 12 in the concave portion 13.
Is provided at a position such that the distance ₁ (FIG. 1) from the document guide 11 to the reading center C of the document in the fitted state is half the paper width W ₁ of the first document size. There is. Further, in the second concave portion 14, when the convex portion 12 is fitted in the concave portion 14, the distance ₂ from the document guide 11 to the reading center C of the document is 2 minutes of the paper width W ₂ of the second document size. It is provided at a position where it becomes 1. More specifically, since the first case of the document size of letter size paper width W ₁ is a 216mm (± 2mm position), ₁
The first concave portion 13 is provided at a position such that If the second document size is A4 size,
Paper width W ₂ is 210 mm (± 2 mm or so), so ₂ is 105 mm
The second recess 14 is provided at a position such that

In a facsimile equipped with the document reading device having the above-described configuration, the document to be read has one side edge on the document guide 11
Set it on the tray 8 by moving it to the side. The document on the tray 8 is introduced into the document insertion slot 6 while sliding, is conveyed by the rotation of the feed roller in the main body case 2, and is read by the reading means.

When the tray 8 is attached to the main body case 2, when the letter-size original is read, the tray support portion 9 is inserted into the insertion hole 7 so that the convex portion 12 fits into the first concave portion 13.
To insert. When the document tray 8 is set at such a position, the center of the document is just aligned with the reading center C by pushing the document of letter size against the guide 11 and biasing it. On the other hand, in the case of reading an A4 size document, the position of the support portion 9 is laterally shifted and inserted so that the convex portion 12 fits into the second concave portion 14. Therefore, in this case, the center of the A4 size original can be matched with the reading center C. In this way, the center of the original can be centered only by selecting the fitting position of the convex portion 12 and the concave portions 13 and 14 according to the original width, so that even if the difference in paper width is as small as several mm, The center of the document can be made to coincide with the reading center C very easily and accurately. Moreover, there is no need to use a rack or gear unlike the conventional guide mechanism, the structure is simple, and no extra parts other than the document tray 8 are required. Moreover, it can be made lighter and thinner than the conventional product.

The present invention can be applied not only to a facsimile, but also to a copying machine. Further, a facsimile having a function of a copying machine, that is, a document reading device that requires a document tray, can be similarly applied. Contrary to the above embodiment, the projection 12 is provided on the insertion hole 7 side and the recesses 13 and 14 are provided on the support portion 9 side.
The intended purpose of the present invention can be achieved even by providing.

[Effect of device]

According to the present invention, even if the size of the original changes, the center of the original can be easily matched with the reading center, and the structure is simple and the number of parts is small as compared with the conventional original tray.

In the document tray of the present invention, at the fitting portion of the insertion hole and the supporting portion, the tray can be attached and at the same time, the above-mentioned center alignment can be performed easily and accurately without displacement.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a plan view showing a part of a document reading device, FIG. 2 is a perspective view of a facsimile equipped with the document reading device, and FIG. 4 is a perspective view showing a state in which a document tray is attached, FIG. 5 is a plan view showing an insertion hole, FIG. 6 is a perspective view showing a support portion, and FIG. 7 is a support portion in the insertion hole. It is sectional drawing of the state inserted. 1 ... Original reading device, 2 ... Main body case, 6 ... Original insertion port, 7 ... Insert hole, 8 ... Original tray, 9 ... Support section, 11 ... Original guide, 12 ... Convex section, 13, 14
...... Concave part, C ・ ・ ・ Center of reading, W ₁ , W ₂・ ・ ・ Document size.

Claims (1)

[Scope of utility model registration request] 1. A main body case incorporating a document reading means for reading a document while feeding it, and a document tray provided at a document insertion port of the main body case. The document tray is inserted so as to face the document insertion port. In the document reading device in which the document tray is detachably attached to the main body case by providing the document tray with a supporting portion to be inserted into the insertion hole in addition to the hole, the document tray is provided at one side of the document tray. A document guide is provided to slide one side edge of the document, and the opening width of the insertion hole is set so that the support part can be moved in the width direction of the document tray, and the insertion hole and the support part are connected to each other. At least one of the insertion hole and the supporting portion at the fitting portion of each other, and at least two concave portions at positions separated from each other in the same direction as the width direction of the document tray. Kicking with, on the other side, provided with a convex portion that is fitted into either one of the recesses of two places above in accordance with fitting possible and document size in the recess of the two positions,
Further, the one concave portion is provided at a position such that the distance from the document guide to the reading center of the document becomes ½ of the paper width of the first document size in a state where the convex part is fitted in the concave part. The other concave portion is such that the distance from the document guide to the reading center of the document becomes one half of the paper width of the second document size in a state where the convex part is fitted in the concave part. A document reading device, which is provided at a position.