JPS61184528A - Platen cover - Google Patents

Abstract

PURPOSE:To enable to position an original correctly on a setting face by interlocking the locking and releasing of a platen cover locking mechanism with a freely rotatable grip. CONSTITUTION:In the case of an original sheet, when the grip 28 is pushed down after setting the original on a table 10, the platen cover 13 moves clockwise while making a pivot movement shaft 18 a fulcrum, and the platen cover 3 is locked to prevent opening. A transparent plate 15 is provided parallel to the table 10, and its bottom face is positioned on the original setting face. When photographing a thick original, the table 10 is descended, the original is placed on it, and the platen cover 13 is moved clockwise and locked. Then, the table 10 is raised, and the original is brought into close contact with the transparent plate 15. As the platen cover 13 is locked at a specified position, the rising up of the transparent plate 15 is hardly caused, and the original can be positioned correctly on the original setting face.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a document holding device used in copying machines, photographing devices, etc., for positioning a document on a document set surface.

[Conventional technology]

For example, in a microfiche camera processor, multiple originals are photographed in a matrix on sheet film, then developed and fixed, and then output as microfiche. When photographing a document, the document is placed on a height-adjustable table, and a document presser presses the document from above to position it on the document set surface. This document presser is composed of a pivotable document presser frame and a transparent plate attached to the frame.

If the document is a thin sheet, you can set the table at the standard position and then just place the document on the table and then set the document holder. However, if the document is thick like a book, It is necessary to adjust the height of the table according to its thickness. In the conventional apparatus, when the table is raised, the transparent glass is also lifted, making it difficult to correctly position the original on the original alignment surface.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION An object of the present invention is to provide a document holding device that can correctly position a document on a document set surface.

[Means for solving problems]

In order to achieve the above object, the present invention provides a locking mechanism to the document holder, positions the document holder so that it does not lift up, and links release of the locking mechanism to a rotatable grip. This is what I did.

The locking mechanism includes a locking lever that engages with a locking piece fixed to the table side, and is biased in the locking direction by a spring or the like. The grip is rotatably mounted on a pair of arms provided on both sides of the document holding frame, and the rotation of the grip is transmitted to the locking lever via an eccentrically provided interlocking lever, and is rotated against the spring. The locking lever can be moved backward and removed from the locking piece.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

[Configuration of Example]

In FIG. 1, a table 10 has a document placed thereon, and its height can be adjusted by an elevating mechanism 11. As is well known, the elevating mechanism 11 moves up and down by imitating an operating handle, and its position changes depending on the thickness of the document. In the case of a book, the thickness of the left and right sides changes depending on the page you want to photograph, so two tables are used to support the left and right sides respectively, and one table is pushed down by the document presser 13 using a parallel link mechanism or a seesaw mechanism. When the other table is lowered, the other table is raised by this lowered amount.

The document placed on the table 10 is positioned on the document center surface by a document presser 13, which is shown in detail in FIG. This document presser 13 has a rectangular document presser frame 14.
A transparent plate 15 is attached to the document, and this transparent plate 15 is placed on top of the document.

Two plates 16 and 17 protrude from both sides of the document holding frame 14, and are provided with notches 16a, 16b and 17.
a and 17b are formed, respectively. These notches 16a and 17a fit into the pivot shaft 18 from below, and the notch 16b.

A moving shaft 19 is fitted into 17b from above. With this configuration, the document holder 13 can be removed or replaced with another one. The moving shaft 19 is for biasing the document presser 13 in the opening direction, and is provided on a pair of links 20 . The lower end of this link 20 is connected to a lever 22 via a pin 21. This lever 22 is rotatably supported by a shaft 24 attached to a bracket 23, and biased counterclockwise by a spring 25 hooked to the other end.

On both sides of the document holding frame 14, a pair of arms 15a,
15b is provided so as to protrude obliquely upward, and a cylindrical grip 28 is rotatably attached to this. As shown in detail in FIG. 3, a disk 29 is fitted to the end of the grip 28, and this disk 29 is rotatably attached to the arm 15a via a shaft 30.

A notch 28a is formed on the left side of the grip 28, and another disc 31 is fitted onto the grip 28 so as to sandwich this notch 28a.

A shaft 32 is eccentrically attached to the disk 29.31, and a U-shaped interlocking lever 33 is attached to the shaft 32.
One end of is connected. The other end of this interlocking lever 33 is connected to a locking lever 35 via a pin 34.

This locking lever 35 has two elongated holes 35a and 35b, respectively, which fit into pins 36 and 37 implanted in the arm 15a. Further, a locking pawl 35c is formed at the tip of the locking lever 35, and the transparent plate 15 engages with the locking piece 38 at a position where the table 10 is parallel. This locking piece 38 is fixed to a main body 39 housing the table 10. A spring 40 is provided between the shaft 32 and the pin 36 to bias the locking lever 35 in the locking direction.
is hung.

[Effect of the embodiment]

In the case of a sheet-like original, the lifting mechanism 11 is operated to set the table 10 at the reference position.

After setting the original on table 10, grip 2
8 and push it down. This grip 2
8 is pushed down, the document presser 13 pivots clockwise about the pivot shaft 18 and moves from the position shown by the two-dot chain line to the position shown by the solid line in FIG. Original presser 1
3 comes to a position close to the table 10, the locking claw 35c of the locking lever 35 comes into contact with the locking piece 38. but,
Since the lower surface of the locking pawl 35c is formed in an arc shape, the locking lever 35 can move backward against the spring 40 and get over the locking piece 38.

When the locking pawl 35c enters the lower side of the locking piece 38, these are in a locked state, so that the document presser 13 is locked so that it does not open. In this case, the transparent plate 15 is parallel to the table 10, and its lower surface is located on the document center surface. Note that since the document presser 13 is biased in the opening direction by the spring 25, the locking pawl 35c and the locking piece 38
There will be no play between the two.

When the document is taken out from the table 10 after being photographed, the grip 28 is rotated against the spring 40. This rotation of the grip 28 is converted into a linear motion by the interlocking lever 33 and then transmitted to the locking lever 35, which is moved backward, so that the locking pawl 35c is disengaged from the locking piece 38.
The document presser 13 is unlocked. When the document presser 13 is unlocked, the document presser 13 pivots counterclockwise due to the pressing force of the moving shaft 19 and is opened to the position shown by the two-dot chain line.

When photographing a thick original, the table 10 is lowered by the elevating mechanism 11, and then the original is placed on it. Next, as described above, the document presser 13 is pivoted clockwise and locked, and then the table 10 is raised to bring the document into close contact with the transparent plate 15. At this time, the original should be placed on the transparent plate 1.
5, but since the document presser 13 is locked in a predetermined position, the transparent plate 15 does not lift up, and the document can be correctly positioned on the M document safe side.

C Effects of the Invention] The present invention having the above configuration is provided with a locking mechanism for positioning the document presser at a predetermined position, so that the document can be correctly positioned on the document center surface. In addition, this locking mechanism is linked to the grip for opening and closing the document holder.
Since the lock is released when the grip is rotated, there is no need to change hands to release the lock, making the operation extremely simple.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention. FIG. 2 is a perspective view of the document holder. FIG. 3 is a sectional view showing essential parts of the present invention. 10... table 13... Original holder 14...Document holding frame 15...Transparent plate 28...Grip 33... Interlocking lever 35...Latching lever 38...Latching piece.

Claims (3)

[Claims] (1) In a document holding device for pressing a document placed on a table from above and positioning it on the document setting surface using a transparent plate attached to a pivotable document holding frame, the document holding frame rotates. In addition to attaching a flexible grip, a locking mechanism is provided to hold the lower surface of the transparent plate to the document set surface, and by interlocking this locking mechanism with the grip, the lock is released when the grip is turned. A document holding device characterized in that the document holding frame can be lifted by pressing the document holding frame. (2) The locking mechanism is characterized by comprising a slidable locking lever that engages with a locking piece fixed to the table side, and a spring that biases the locking lever in the locking direction. A document holding device according to claim 1. (3) The document holding device according to claim 2, wherein the locking lever is connected to an interlocking lever eccentrically attached to the grip.