JPH0444507Y2 - - Google Patents

Description

[Detailed explanation of the idea]

Industrial Application Field This invention relates to a paper feed cassette used in office machines such as printers and copiers. BACKGROUND OF THE INVENTION Since paper comes in various sizes, it is stored in individual cassette cases. Then, two detectors are installed on the office machine side, detection pieces corresponding to each of these detectors are installed in the cassette case, and by turning the two detectors on and off, for example,
It automatically detects four types of paper, including B5, A4, letter size, and legal size. Problems to be Solved by the Invention However, the detection piece is formed integrally with the cassette case and can be selectively folded and removed, or the chip of the object is fixed by adhesive or other means. Therefore, once one cassette case is specified for paper of a specific size, the detection target cannot be changed, and a cassette case is required for each type of paper size. Although there is an idea to detachably attach the detection piece to an arbitrary position in the cassette case, when detecting sheets of different width dimensions, there is a problem of false detection if the detection piece is attached in the wrong position. This idea was developed in consideration of these points, and allows the user to use a common cassette case to store legal-size paper and letter-size paper, thereby reducing the number of cassette cases the user has. The purpose is to provide paper feed cassettes. Measures to solve the problem Legal size or letter size paper,
Or, it is a cassette case that can store either of two types of paper of different sizes,
This cassette case includes a paper width guide that guides the edge of the paper in the paper width direction according to the paper width of the paper to be stored, a partition plate that brings the edge of the paper in the paper length direction into contact, and a partition plate that guides the edge of the paper in the paper length direction. The cassette case has a plurality of holding parts that are detachably held according to the paper length of the paper, and the cassette case has a plurality of holding parts that respectively face a first detector and a second detector provided in the main body of the apparatus. is provided with a first opening and a second opening;
The first and second openings are each provided with a first detection piece and a second detection piece that close each opening, and each of the detection pieces can be detected from each opening. continuously formed on the cassette case through a thin strip of weak strength so that it can be easily removed;
Depending on the presence or absence of the first detected piece, the first detector stores whether the type of paper stored is legal size or letter size paper, or
The second detector identifies two types of paper with different sizes, and the second detector detects the size identified by the presence or absence of the first detection piece, depending on the presence or absence of the second detection piece. The two different types of paper are further identified and the size of one of the papers is specified, and after the second detected piece is removed, a second opening is placed around the second opening to close the second opening again. A locking part is provided to removably lock the shield. Effect: Therefore, the first and second detection pieces are removed from the cassette case by breaking the strips, thereby opening the first and second openings.
Further, after the second detection piece is removed, the second opening is covered with the shield by the locking portion and is maintained in an unopened state. Therefore, when the detector detects the presence or absence of openings in the first and second openings, the opening pattern is used to identify the type of cassette case, i.e., what size paper the cassette case is for. be done. That is, when the presence or absence of the first opening is detected, it is determined whether the cassette case is for legal size or letter size paper, or for paper of the other two sizes. If it is determined that the cassette case is for paper of another size, the presence or absence of the second opening is detected to identify which of the two types of paper the cassette case is for. Ru. On the other hand, if the cassette case is identified as being for legal-size paper or letter-size paper, the presence or absence of the second opening is detected to determine whether the cassette case is for legal-size paper or letter-size paper. It is determined whether it is for paper or not. In other words, legal size paper and letter size paper have the same width dimension, and the second detection piece is removed from the first opening on the condition that the first detection piece is removed from the first opening. Since the cassette case can be identified by whether or not there is a shield at the opening of the cassette case, the cassette case can be shared between the two. In this case, since the engagement of the locking portion specifies the opening into which the shield is fitted, it is possible to prevent the sheet from being mistakenly identified as a sheet of a different size. In addition, by identifying paper other than legal size or letter size paper depending on whether or not the first detected piece is present in the first opening, the cassette case is set according to the paper width. Prevent mistakes in changing settings. Embodiment An embodiment of this invention will be described based on the drawings. 1 is a cassette case, and this cassette case 1
A press plate 2 on which the paper is placed is attached to be movable up and down about a fulcrum 3, and paper width guides 4 are attached to both sides so that the position can be adjusted according to the width of the paper.
A square hole 1a is formed in the lower surface of the cassette case 1 to face a pressing body (not shown) that pushes up the pressing plate 2 when the cassette case 1 is attached to a printer (not shown) as the main body of the apparatus. Further, a lever 6 having a claw 5 for pressing the corner of the paper is held on the paper width guide 4 by a pin 7 so as to be movable up and down. A relief portion 8 is formed in the press plate 2 to avoid interference with the paper width guide 4 during its rotational operation. Next, Table 1 shows the types of paper used.

[Table] Next, a partition plate 9 is provided to position and support one end of the paper, and a projecting piece 10 is formed on the lower edge of the partition plate 9. The cassette case 1 has slit-shaped holding parts 11, 12, 13, and 14 that hold the protruding piece 10 in a freely insertable/removable manner, and slit-like holding parts 15, 16, 17 that hold both side plates of the partition plate 9 in a freely insertable/removable manner. , 18 are formed. A holding part 11 for the front edge of the cassette case 1,
If the distance to 15 is l ₁ , the distance to holding parts 12 and 16 is l ₂ , the distance to holding parts 13 and 17 is l ₃ , and the distance to holding parts 14 and 18 is l ₄ , then l ₁ is B5 L ₂ corresponds to the length of letter size paper, L ₃ corresponds to the length of A4 size paper, L ₄ corresponds to the length of legal size paper do. In addition, the facing interval B of the paper width guide 4 is
Matches paper widths of B5 size, A4 size, letter size, and legal size. First and second detection pieces 19 and 20 are formed on one side of the cassette case 1. These pieces 19 and 20 to be detected are surrounded by a groove 21 and are continuous to the side surface of the cassette case 1 via a strip 22. A locking hole 23, which is a pair of upper and lower locking portions, is formed near the detection target piece 20 at the bottom. Further, on the other side of the cassette case 1, there is a square window 24 which is a storage part that matches the outline of the groove 21;
A locking hole 25 is formed near the square window 24 and matching the locking hole 23 . Furthermore, a protrusion 26 and a locking hole 2 that are fitted into the square window 24 are provided.
One shielding body 28 is provided which has a locking pawl 27 which is a locking portion that elastically engages with 3 and 25. In such a configuration, paper of each size is placed in a cassette case 1 whose dimension B is determined according to the width of the paper.
For B5 size paper, insert the partition plate 9 into the holders 11 and 15, for A4 size paper, insert the partition plate 9 into the holders 13 and 17, and for letter size paper, insert the partition plate 9 into the holders 13 and 17. 9 to holding part 1
2, 16, and if it is legal size paper, insert the partition plate 9 into the holding parts 14, 18. Since letter size paper and legal size paper have the same paper width, the opposing spacing of paper width guides 4 is also the same, and they are replaced by a common cassette case 1, and only the mounting position of the partition plate 9 is changed. When the cassette case 1 is attached to the printer, the size of paper to be used is detected by a detection switch 29, which is a first detector, and a detection switch 30, which is a second detector, provided on the printer side. For this purpose, in the cassette case 1 containing B5 size paper, the strip 22 is folded and the second detected piece 20 is removed to form a second opening 32, as shown in FIG. 5a. The cassette case 1 containing A4 size paper leaves the first and second detection pieces 19 and 20, as shown in FIG. 5b. As shown in FIG. 5c, the cassette case 1 containing legal size paper is folded into strips 22 and separated into the first and second detection pieces 1.
9 and 20 are removed to form first and second openings 31 and 32. When storing letter-sized paper, store the letter-sized paper in the cassette case 1 that stores legal-sized paper, that is, the cassette case 1 in which the first and second openings 31 and 32 are formed, and then As shown in Figure d, the shield 28
The locking pawl 27 is engaged with the locking hole 23, and the protrusion 26 is fitted into the second opening 32. Therefore, the always-on detection switch 29,3
If 0 is used, the detection switch 29 will be turned off when the actuator 29a is pressed by the first detected piece 19, and the detection switch 30 will be turned off when the actuator 29a is pressed by the second detected piece 20 or the shield 28.
It turns off when a is pressed.

[Table] That is, as shown in Table 2, the detection switch 2
From the operations 9 and 30, a combination of signals identifying the paper size is obtained. In this way, B5, A4, and legal size papers with different paper widths are identified by the presence or absence of detected pieces 19 and 20.
After 9 and 20 are left or removed, the cassette case 1 is dedicated to a specific paper, and there is no possibility of making a mistake. The cassette case 1 can be used in common for legal size paper and letter size paper, which have the same paper width, by simply changing the mounting position of the partition plate 9. In this case, by shielding the second opening 32 with the shielding body 28, the paper can be automatically identified. Furthermore, by engaging the locking pawl 27 with the locking hole 23, the first opening 31 is closed by the shield 28;
Also, it is possible to prevent mistakes in identifying B5 size paper and letter size paper due to this mistake. Furthermore, when storing legal size paper, the locking claw 27 is engaged with the locking hole 25 since the shield 28 is not required. This allows the shield 28 to be saved for letter size paper. Effects of the invention Since this invention is configured as described above, legal size paper and letter size paper with the same width dimension are different from each other on the condition that the first detected piece is removed from the first opening. Since the second detected piece can be identified by whether or not there is a shield in the second opening from which it has been removed, it is possible to share the use of cassette cases between the two, and the number of cassette cases that the user has can be reduced. In this case, since the engagement of the locking part specifies the opening into which the shield is fitted, it is possible to prevent the paper from being mistakenly identified as another size. By identifying paper other than legal size or letter size paper depending on whether or not the first detected piece is present in the first opening, the settings after setting the cassette case according to the paper width of the paper This has effects such as being able to prevent mistakes in changes.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is an exploded perspective view, Figure 2 is a plan view, Figure 3 is a partially enlarged perspective view showing the relationship between the detected piece and the detection switch, and Figure 4 is an enlarged view of the shield storage structure. FIG. 5 is an enlarged side view showing the state of presence and removal of the detection target piece and the state of attachment of the shield. 1...Cassette case, 4...Paper width guide, 9...
...Partition plate, 11-18...Holding part, 19...First detection target piece, 20...Second detection target piece, 22...
Strip, 23... Locking hole (locking part), 24... Square window (storage part), 27... Locking claw (locking part), 28...
Shielding body, 29...detection switch (first detector),
30...detection switch (second detector), 31...
...first opening, 32...second opening.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A cassette case that can store either legal size or letter size paper, or two types of paper of different sizes, and this cassette case has the width of the paper to be stored. a paper width guide that guides the edge of the paper in the width direction of the paper according to the length of the paper; a partition plate that brings the edge of the paper of the paper in the paper length direction into contact; and the partition plate that is detachable according to the paper length of the paper. The cassette case has a first opening and a second opening so as to face the first detector and the second detector provided in the main body of the device, respectively. an opening, and the first opening and the second opening are each provided with a first detection piece and a second detection piece that block each opening, and each of the detection objects The strips are continuously formed in the cassette case through weak strips so that they can be easily removed from each opening, and the first detector is configured to detect the presence or absence of the first detected strip. The second detector identifies whether the type of paper to be stored is legal size paper, letter size paper, or two other types of paper of different sizes, and the second detector detects the second paper size. In response to the presence or absence of the detection piece, the two types of paper of different sizes identified by the presence or absence of the first detection piece are further identified and the size of one of the papers is determined, and around the second opening, A paper feed cassette characterized by being provided with a locking portion that removably locks a shielding member that can close the second opening again after the second detection target piece is removed. 2. The paper feed cassette according to claim 1 of the utility model registration claim, characterized in that a storage section for removably holding the shield is formed in the cassette case.