JPH0477304B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding-type copying machine, etc., which is equipped with a mechanism for winding up a document holding sheet and a cover of a copying machine, a microfilm photographing machine, etc., and is capable of moving the mechanism. This invention relates to a cover device.

Conventionally, the document holding lid of a copying machine, etc., has a rear end of a resin plate etc. that is rotatably supported by a hinge.
The front side can be opened and closed by rotating it up and down by hand.

Therefore, when opening and closing the document holding lid, the document may shift due to wind pressure, or the document may stick to the lid due to friction, or if the opening/closing angle at the hinge portion is within a predetermined range when opening and closing the lid, the lid may If you put your hand back on it or lift it beyond a certain range, it would open all at once, making it troublesome to set up the document.

In addition, some small-sized copying machines have a document table that moves from side to side, but in the case of thick documents, the document must be held down by hand, which is cumbersome to handle, and it is difficult to copy thick documents. In some cases, the lid could not completely block out light, and there were drawbacks such as black lines appearing on the copy area, making it impossible to make clear copies.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and the document holding cover is configured to be able to be wound up by a winding mechanism such as a retractor.
The front end of the cover is fixed so that it can press tightly according to the thickness of the document, and the document is placed at a position where the winding mechanism section is higher than the thickness of the document placed on the document placement surface. The present invention provides a roll-up type cover device for a copying machine, etc., which is attached so as to run on a surface.

The present invention will be explained in detail below.

First, the principle of the present invention will be explained based on FIGS. 1 to 4. In the figure, reference numeral 1 denotes a document mounting table of a copying machine, reference numeral 2 denotes a winder which is urged to rotate in the winding direction by an elastic body, and reference numeral 3 denotes a document holding cover wound around the winder 2.

A frame 3a is fixed to the drawing end of the document holding cover 3, and this frame 3a is fixed to the document table 1.

Further, a cover holding plate 5 that guides the feeding and winding of the document holding cover 3 is attached to the feeding opening of the winding machine 2 via a cover holding spring 6 in the form of a leaf spring. It is designed to be brought into close contact with the upper surface of the original platen 1.

Then, by manually running the winder 2, the document holding cover 3 is pulled out. At the end of its travel, the winder 2 is engaged with and fixed to a hook 7 fixed to the document platform 1, and the document P is pressed against the upper surface of the document platform 1 by the presser cover 3.

In this way, the present invention runs the winder 2 and pulls out the presser cover 3, so that the presser cover 3 is pulled out so as to be placed on the document P without sliding on the document P. As shown in the figure, the document P is no longer misaligned or scratched.

Next, a specific example of the present invention will be explained in detail based on FIGS. 5 to 9.

As shown in FIGS. 5 and 6, the frame 3a at the end of the drawer of the document holding cover 3 is fixed to one end surface of the document platform 1, and the take-up body 2 is placed on the document placement surface of the document platform 1. It is installed so that it can be run.

The winding main body 2 is installed at a height h greater than the thickness of the original P with respect to the original platen 1 (see FIGS. 7 and 9), and the winding main body 2 is placed on both sides of the original platen 1. When traveling on the document table 1 along the installed guide rails 22a and 22b, the document holding cover 3 let out from the take-up main body 2 swings up and down according to the thickness of the document P. It is configured.

That is, there are main body support parts A on both sides of the winding main body 2.
21a, and a main body support part B21b are attached, and a pulley 24 attached to the main body support part A21a wraps a wire 25 around it, so that it can be moved in the front and rear directions by rotation of the prime mover.

At this time, the document holding cover 3 that is let out from the take-up main body 2 is attached to the take-up main body 2 or the main body support part A21.
an arm 40 rotatably supported on a and B21b;
The document P is pressed onto the document table 1 by the roller 41 attached to the tip of the rollers a and 40b (the ninth
(see figure).

The winding main body 2 is constructed as shown in FIG.

That is, the document holding cover 3 is wound around the hollow pipe 10 with one end fixed to it.
The hollow pipe 10 has bushes A11 at both ends.
is fixed to the bush B12, and inside the hollow pipe 10, a shaft 14 is installed, one end of which is rotatably supported by a bearing 13 provided on the bush A11 side, and which penetrates the bush B12 side. An elastic body 15 such as a coil spring is inserted into the shaft 14 and is located between the shaft 14 and the hollow pipe 10. One end of the elastic body 15 is fixed to the shaft 14, and the other end is fixed to the bush B12. ing.

Further, the shaft 14 is rotatably supported by a bush B12, and the bush A11 is rotatably supported by a bearing A17 to which the cover 16 of the winding main body 2 is fixed.
A shaft 14 passing through is fixed to the bearing B18 via a fixing screw 19. The bearing B18 is fixed to the main body support part B21b, and the opposite end of the cover 16 is fixed to the main body support part A21a. The fixing screw 19 is used when setting the shaft 14 in order to apply an initial return force to the hollow pipe 10 around which the document holding sheet 3 is wound.

Guide holes are provided in the main body support parts A, B21a, 21b installed at the ends of the winding main body 2,
Guide rails 22a and 22b, both ends of which are fixed to the document table 1, are inserted into these guide holes (see FIGS. 7 and 8).

The cover holding member at this time is an arm 4 with a roller 41 attached to its tip, as shown in FIG.
Spring 42a, 4 is installed on the fulcrum side of 0a, 40b.
2b is attached, and when there is no load, arm 4
0a and 40b are set at an angle of θ ₁ from the vertical state.

Note that in the configuration described above, the arms 40a,
The roller 41 rotatably attached to the tip of the roller 40b may be a wide curved plate.

Further, the springs 42a and 42b that return the arms 40a and 40b are elastic bodies, and are not limited to coil springs, but may also be plate springs, torsion springs, tension springs, etc., and are appropriately selected for structural reasons.

Next, the operation of this embodiment will be explained.

First, a thick original P is placed on the upper surface of the original table 1, and the take-up main body 2 is placed on the guide rails 22a, 2.
2b, the document holding cover 3 let out from the take-up main body 2 is moved by the rollers 41 at the tips of arms 40a, 40b which are pivotably supported.
The arm 40
The angles a and 40b change from θ ₁ to θ ₂ depending on the thickness of the original P (see FIG. 9), and press the original P. At this time, the roller 41 is pressed by the spring force of the springs 42a and 42b, and even a thick original P can be pressed tightly onto the original platen 1.

Therefore, according to the above-described embodiment, even if the document becomes thick, it can be stably pressed tightly against the document table, preventing the document from lifting up, and ensuring that the document remains intact. Copying and photographing operations can be performed smoothly and with high precision.

As described above in detail, the roll-up cover device for copying machines, etc. according to the present invention has a simple structure, is easy to handle, and can hold the document securely and in accordance with the thickness. By moving the take-up main body, the document holding cover is pulled out so as to be placed on top of the document, thereby eliminating document shifting and pinching due to movement of the holding cover and wind pressure.

Further, since the take-up main body of the present invention moves parallel to the document placement surface, there is no need for an extra space above the opening/closing lid as in the conventional case, and other uses can be considered.

Further, automation can be achieved by fixing the drawer end side of the document holding cover and causing the winder to automatically travel along the guide.

[Brief explanation of the drawing]

FIGS. 1 to 4 are diagrams explaining the principle of the present invention, and FIG.
The figure is a plan view of an embodiment of the present invention, FIG. 6 is a side view of the same embodiment, and FIG. 7 is a main part of the above embodiment.
Figure a is a front view, figure b is a cross-sectional view taken along the line bb of a,
Fig. 8 is a longitudinal cross-sectional view of the main part of the above embodiment, Fig. 9 shows the operation of the above embodiment, Fig. 8a is a front view, and Fig. 9b is a front view.
is a sectional view taken along line bb of a. DESCRIPTION OF SYMBOLS 1... Document mounting table, 2... Winding main body, 3... Document holding cover, 21a, 21b... Main body support part,
22a, 22b...Guide rail, 24...Pulley, 25...Wire.

Claims (1)

[Claims] 1. A cover is provided that is wound around a winding drum that is urged to rotate in the winding direction by an elastic body, and the cover is wound at a position higher than the thickness of the document placed on the document placement surface. a take-up body attached to run on the document placement surface; a cover holding member attached to the take-up body so as to be pressed in the direction of the document placement surface; A roll-up cover for a copying machine, etc., comprising a placing table having a document placing surface, the drawer end of the cover being fixed to the placing table, and the winding main body traveling. Device. 2. The winding-type cover device for a copying machine or the like according to claim 1, wherein the winding main body is mounted so as to be able to automatically run on a guide member by a prime mover.