JPH0540027Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a paper size detection mechanism for a paper storage cassette used in electrostatic photocopiers, printers, etc. The present invention relates to a paper size detection mechanism for a paper storage cassette in which a member to be detected is provided on the outer peripheral surface of the cassette main body.

[Prior Art] As a paper storage cassette, for example, there are paper cassettes in which sheets of various sizes are placed on a mounting plate that can be raised and lowered by a drive, and as seen in Japanese Patent Application Laid-Open No. 60-56741, the position of a partition plate is changed. There is a so-called universal type in which the position can be changed according to the paper size.

In these universal cassettes, by replacing the detected member for the paper size detector on the machine side, the paper size detection mechanism can change the size display format in response to changes in the size of the stored paper. It is provided.

[Problem that the invention attempts to solve]

By the way, the more paper sizes can be handled, the more the number of detected members for size display increases, and the number of floor detected members to be replaced also increases. Among these members, the members to be detected that are not used for size detection must be removed from the size detection position and stored.

However, the detected member is relatively small and easily lost, and only the person who takes part in replacing the detected member can know where the detected member is stored, and the true paper size In addition to being unable to display, in the case of a copying machine that sets, for example, exposure to end at the same time as displaying the paper size, a situation may occur in which it becomes impossible to make copies corresponding to the original.

Alternatively, if the copying machine has a variable magnification ratio that can be set by determining the size of the original and the size of the copy paper, there is a drawback that the variable magnification ratio will be incorrect, making it impossible to obtain a desired copy image.

Furthermore, since only the person who stored the detected member would know what the detected member was, there was a risk that the detected member would be discarded.

The present invention was devised in view of the above-mentioned circumstances, and although it is an extremely simple improvement, it is excellent in terms of use and eliminates all of the above-mentioned drawbacks.It is also easy to assemble and has a paper storage that is advantageous in terms of cost. We are trying to provide a paper cassette size detection mechanism.

[Means for solving problems]

The paper size detection mechanism of the paper storage cassette according to the present invention, which has achieved the above object, has a positioning member that positions the member to be detected with respect to the paper size detector, and a member to be detected between the positioning member and the positioning member. a holding member for positioning, the holding member is molded integrally with the positioning member in a state where one end is fixed and is flexibly deformed, and the member to be detected is positioned at the paper size detection position and the detection member is formed integrally with the positioning member; The present invention is characterized in that the position holding means fixedly held at two positions, including the non-detection position, which is out of position, is provided so as to be freely fixed and released by displacement of the holding member against elastic force.

[Effect]

According to the characteristic structure described above, by elastically displacing the holding member to release the fixed holding of the detected member by the position fixing means, and changing the position of the detected member, the size can be adjusted according to the size change of the paper. It can take the form of a display.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a paper size detection member holder A, and FIG. 2 shows a cross section thereof. FIG. 3 shows a cross section of the paper storage cassette C installed on the movable rack B. Inside the cassette main body 1, which has a paper feed section 2 for the loading section 4, there is provided a paper loading storage section 5 capable of loading a large amount of copy paper a of various sizes, which can be driven up and down via a lifting mechanism 6. , and a roller 8 corresponding to the paper feed roller 7 on the side of the copying machine main body 3 is provided in the paper feed section 2, and the uppermost sheet a of the paper storage section 5 is transferred to the upper and lower pair of rollers 7 and 8. A paper feeding and conveying device 9 is provided to feed the paper.

An outer circumferential surface portion S of the paper storage cassette C on the front end side in the loading direction with respect to the paper feed section 2, and
The detected member holder A is provided in correspondence with the paper size detector 10 on the side of the copying machine main body 3, and the detected member holder A and the paper size detector 10 constitute a paper size detection mechanism. are doing.

The specific structure of the detected member holder A is as shown in FIGS. 1 and 2.

In these figures, reference numeral 11 denotes a box-shaped body made of synthetic resin with screw fixing parts g arranged on both the left and right sides, and plate parts i, i on both the left and right sides with the side parts serving as guide plate parts d, and therebetween. A plurality of bulges j are provided at intervals (three are exemplified), and each plate portion i and the outer corner of the bulge j are provided with: A positioning member m for positioning the detected member 12 with respect to the paper size detector 10 is provided in series.

An operation opening b is formed by adjacent positioning members m, and each upper part of the plate part i and the bulging part j on both sides, and each upper part of the adjacent bulging parts j, , a detected member insertion portion c... is formed respectively.

e is a plate-shaped holding member located between the guide plate parts d and d, which holds the box-shaped main body 11 in a state where one end is fixed.
It is integrally erected on the bottom plate n, and a retaining portion f is formed at the upper end.

With the holding plate part e being bent and deformed, the detected member 12 is inserted into the guide part G between the holding member e and the positioning member m through the insertion part c.

Note that the detected member 12 is made of a magnet because the paper size detector 10 has a reed switch configuration.If the paper size detector 10 is to be a photo interrupter or a proximity switch, the detected member 12 is made of a magnet. shall be changed to one with a configuration corresponding to them.

Next, 14 in the figure is a position holding means for the detected member 12 inserted into the guide part G, and a hole h is formed in the center of the detected member 12. Position holders 13, 13 are provided on the holding member e at intervals in the moving direction of the detected member 12, and a screwdriver or the like is hooked into the central hole h of the detected member 12 through the operation opening b. By moving the member to be detected 12 while displacing the holding member e against its own elastic force, the member to be detected 12 is moved to the size detection position X corresponding to the paper size detector 10. It is designed to be able to be fixedly held at two positions, the detection position X and the detected position Y, which is outside the detection position X.

Therefore, by moving the necessary members to be detected 12 to the size detection position X according to the size of the paper stored in the cassette main body 1, it is possible to
Supports display of 16 different paper sizes.

Note that the detected member holder A is attached to the copying machine main body 3.
Depending on the placement position of the paper size detector, the detected member holder A may be provided on the outer peripheral surface of either the left or right side of the loading section 2. , may be provided on the outer circumferential surface of the bottom side, or may be provided on the outer circumferential surface of the lid relative to the loading section 2, and
The number of members to be detected corresponds to the number of paper size detectors, and at least one of the members to be detected is
The present invention also covers devices that have the following.

Further, as the paper storage cassette C, it is also possible to use a generally popular type that accommodates about 200 sheets of paper a.

FIG. 4 shows another embodiment of the detected member holder A. This device has a box-shaped main body 11 equipped with positioning members m on both the upper and lower sides, and one guide portion G for sliding the detected member 12 in the left-right direction, and has, for example, four size detection positions X... 6 on the holding member e in correspondence with the paper size detector so that one non-detection position Y appears on each side of the paper size detector.
The detected member 12 is provided with a position holder 13 and has a hole h that engages with the position holder 13.
By inserting two of them into the guide section G, it is possible to display a total of 11 different paper sizes.

Incidentally, it is also possible to provide a magnetic body in correspondence with the size detection position X and non-detection position Y on the guide part G, and to maintain the position by magnetically attracting the detected member 12 to the magnetic body. In other words, the specific configuration of the position holder 13 can be modified in various ways.

[Effect of idea]

As explained above, according to the paper size detection mechanism of the paper storage cassette of the present invention, the detection member is provided in the cassette body in a state where the position can be changed and fixedly held. In addition to achieving a size display format that corresponds to the size change, there is no inconvenience such as the risk of storing or losing the detected member, and anyone can easily change the size display format.

Moreover, the position of the detected member for changing the size display format is changed by elastically displacing the holding member and releasing the fixed holding of the detected member by the position fixing means. For example, as shown in FIG. 2, a highly accurate size detection configuration is adopted in which the detected member is reliably fixed in position by means such as engaging a position holding tool with the central hole of the detected member. However, the position of the detected member can be changed extremely easily.

Furthermore, in the present invention, since the holding member is molded integrally with the positioning member with one end fixed and being flexibly deformed, the number of parts for configuring the detection mechanism is reduced. In addition, assembly and processing are extremely easy, and manufacturing costs can be significantly reduced, making it possible to provide a paper size detection mechanism that is inexpensive and advantageous for industrial use.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the detected member holder with main parts cut away, Fig. 2 is its sectional view, Fig. 3 is a sectional view of the paper storage cassette, and Fig. 4 is another embodiment of the detected member holder. FIG. 1...Cassette body, 10...Paper size detector, 12...Member to be detected, 13...Position holder,
G...Guide, S...Outer peripheral surface portion, X...Size detection position, Y...Non-detection position.

Claims (1)

[Scope of utility model registration request] A paper size detection mechanism for a paper storage cassette in which a member to be detected for a paper size detector on the machine side is provided on the outer peripheral surface of the cassette main body, and a positioning member for positioning the member to be detected with respect to the paper size detector. , a holding member for positioning the detected member between the positioning member, and the holding member is molded integrally with the positioning member in a state where one end is fixed and in a state where it is flexibly deformed, and Position holding means for fixing and holding the detected member at two positions, a paper size detection position and a non-detection position removed from the paper size detection position, is provided so as to be freely unfixed by displacement of the holding member against elastic force. A paper size detection mechanism for a paper storage cassette, characterized in that: