JPS59207335A - Universal cassette - Google Patents

Abstract

PURPOSE:To make it possible to appropriately discriminate the size of papers on the loading side, by providing such an arrangement that movable position regulating guides are associated with a variable resistance type paper size detecting mechanism. CONSTITUTION:Upon storing of papers, paper striking guides 2a, 2b are moved to strike against two sides of papers. Thereby, the contact position of a contact element 3 with a resistance plate 4 varies to change its resistance value. Accordingly, the resistance value may be obtained corresponding to the length and width of the papers, the copying machine appropriately and automatically detects the size of papers which are merely set in the copying machine, thereby the efficiency of copying operation may be aimed at being enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industry - Second Field of Application] This invention relates to a universal cassette with a paper and size detection mechanism.

[Prior art]

Conventionally, the method for detecting paper size is to provide unevenness or magnets on the cassette that holds the paper, and when the paper is set in a copying machine, the copying machine uses this to determine which size cassette it is for. Generally, it is detected by However, in the case of a universal cassette whose size can be arbitrarily changed, the method described in item 1 cannot be used. Therefore, in such cases, it is often the case that the paper is simply processed using the maximum paper size that can be accommodated in the cassette. Therefore, in the case of a universal cassette, the paper size cannot be detected on the copying machine side, resulting in discrepancies in the size and loading direction of the original and paper, resulting in a significant decrease in operability, and the copying speed is also limited, even at maximum speed. Even if paper of a different size is stored, it will always be the same as the maximum paper size, which is inconvenient when copying small-sized paper.

[Purpose of the invention]

This invention has been made in view of the point mentioned in item 1 above, and is intended to enable the user to accurately determine which size of paper is stored in the universal cassette when the universal cassette is installed. The purpose is to

[Structure of the invention]

In order to achieve the above object, the present invention provides a movable paper position regulating guide and incorporates a paper size detection mechanism that can detect the paper size by detecting the set position in relation to this guide. In this way, the size of the paper to be accommodated can be detected by adjusting the position of the paper to be accommodated using the guide.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figures 1 to 4 show an embodiment of the present invention.
Applicable to a universal cassette of a copying machine that can accommodate paper of various sizes by regulating each adjacent side of the paper with two position regulating guides according to the size of the paper to be accommodated. Indicates the case where

In Figures 1 and 2, (]J is the cassette outer frame, (
Za) and (2b) are paper abutting guides that serve as regulation guides whose set positions can be moved, and these paper abutment guides (
By moving the guides 2a) and (2b) along the valley groove G (1), the size can be changed arbitrarily. Each paper abutment guide (2a), (2b), for example, the paper abutment guide Taking the guide (2a) as an example, as shown in FIG. 8 and FIG. ), there is a resistor plate (4.
), but on the other side there are similarly conductive plates (5), respectively W#G
A resistive plate (4) and a conductive plate (5) are arranged along the
) and the terminals (6) on the front side of the cassette (1a).
are electrically connected by conductive wires (7) and (8), respectively, and when the guide (2a) is moved after pressing the paper, the resistance value seen from the terminal (6) is the set position. It is set to change depending on. That is, a resistance value is obtained that corresponds to the size of the paper to be accommodated in the vertical direction in FIG. 2.

Furthermore, the paper abutment guide (2b) has a similar configuration, and is designed to obtain a resistance value that corresponds to the size of the paper to be accommodated in the left-right direction in Figure 2. , each paper abutting guide (2a), (
The paper size can be detected from the copying machine side by detecting the setting position 2b) by a change in resistance value.

Next, 1-, the detection method according to the embodiment described above will be explained with reference to FIG. When the contactor (3) hits each adjacent side, the contactor (3) slides along the resistance plate (4) accordingly, so that the resistance value seen from each terminal (6) changes. For example, if the size of the paper to be stored is large in the vertical direction in FIG. 2, a resistance value R1 will be obtained as shown in FIG. 5(A), and if the paper is smaller than that, As shown in the same figure (■3), a resistance value It greater than the above resistance value R1 was obtained, and the paper abutment guide (2b moon rule also operated in the same way) A resistance value that is opposite to the size can be obtained.Therefore, if the paper thrust guide (2
By simply placing a) and (2b) into the copying machine, the copying machine will check that the paper size of the stored paper is correct (
Two can be detected. Therefore, even with a universal cassette whose size can be changed arbitrarily, there is no problem of reduced operability due to mismatches in document and paper size or loading direction, and the correct size can be displayed on the control board of the copier. Not only can it be displayed, but it can also prevent mistakes in the orientation and size differences between the original and paper.
Furthermore, the copying speed can also be made consistent with the size of the paper being accommodated. Furthermore, by being able to accurately detect the paper size, it becomes possible to fully utilize functions such as automatic magnification selection and automatic paper selection.

〔Effect of the invention〕

As described above, this invention allows the paper size of the stored paper to be accurately detected on the loaded side, thereby improving operability without sacrificing the feature that the size can be changed arbitrarily. It has the effect of being able to achieve the following.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 (AJ and CB+ are respectively an enlarged plan view and a side view of section A in Fig. 2, and Fig. 4 is an enlarged plan view and side view of section A in Fig. 2. Fig. 3 (cross-sectional view of Al along line B-B, Fig. 5 is an explanatory diagram explaining the detection method., Phase-J explanation (2a), (21))...Paper abutting guide (3)...1*tentacle (4)...
...Resistance plate (0)... Terminal

Claims (1)

[Claims] A paper position regulating guide whose setting position can be moved according to the size of the paper to be accommodated, and by detecting the setting position of this guide, it is possible to detect the paper size of the paper to be regulated by the guide. A universal cassette equipped with a paper size detection mechanism.