JPH036588Y2 - - 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. 2. Description of the Related Art In office machines, paper for copying or printing comes in various sizes and is housed 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, B5,
There is one that automatically detects four types of paper such as 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 a separately formed chip is fixed by adhesive or other means. Therefore, once one cassette case is designated for paper of a specific size, the detection piece cannot be changed. As a result, even in the case of legal-size paper or letter-size paper, which are used less frequently in Japan and have the same width, separate cassette cases must be provided, which is uneconomical. 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. Means for Solving the Problem A cassette case is provided in which legal size and letter size paper and two types of paper of other sizes are stored with their paper widths differentiated by paper width guides, and the cassette case stores the paper of the paper size A holding portion into which a partition plate that abuts the trailing edge is removably fitted is positioned and formed at a position corresponding to the length of the paper, and the cassette case is surrounded by a groove and is provided in the groove. a removable first detection piece that is continuous as a part of the outer wall of the cassette case and faces the first detector;
an opening having an area approximately twice the size of the first detected piece, and an opening having an area approximately half of the opening in the cassette case and selectively facing the second detector. A second detection target piece is provided slidably along the opening. Function: Therefore, the partition plate is fitted into an arbitrary holding portion depending on the type of paper of letter, legal and other two sizes to be stored in the cassette case. Then, depending on the stored paper, the first detected piece is selectively cut out by folding the chip, and the presence or absence of the first detected piece is detected by the first detector, and legal and letter size paper is detected. Distinguish the paper in the group from the two types of paper in the other groups, slide the second detection piece through the opening and selectively face the second detector, and The type of paper in the same group is identified by detecting the presence or absence of the second detected piece. Therefore, it is possible to share a cassette case that stores legal size paper and letter size paper with the same paper width. Embodiment An embodiment of this invention will be described based on the drawings. Reference numeral 1 denotes a cassette case, and a press plate 2 on which paper is placed is attached to the cassette case 1 so as to be movable up and down about a fulcrum 3, and a paper width guide 4 for guiding one side of the paper is formed on one side. A paper width guide 5 is attached to the other side so that its position can be adjusted according to the width of the paper. Further, a lever 8 having a claw 7 for pressing the corner of the paper is held on the paper width guide 5 and the side plate 6 opposite thereto so as to be movable up and down. There are four types of paper to be used, and the sizes of each are shown in Table 1.

[Front] Next, a partition plate 1 that comes into contact with one end of the paper.
0 is provided on the lower edge of this partition plate 10.
1 is formed. The cassette case 1 has slit-shaped holding parts 12, 13, and 14 that hold the protruding piece 11 in a freely insertable/removable manner, and slit-shaped holding parts 15 that hold both ends of the partition plate 10 in a freely insertable/removable manner.
16 and 17 are formed. holding part 12 for the front edge of the cassette case 1;
15 is l ₁ , the distance to holding parts 13 and 16 is l ₂ , the distance to holding parts 14 and 17 is l ₃ , and the distance to rear end inner surface 18 is l ₄ , then l ₁ is B5 size corresponds to the length of the paper, l ₂ corresponds to the length of the letter size paper, l ₃ corresponds to the length of the A4 size paper, l ₄ corresponds to the length of the legal size paper . Furthermore, there are three attachment positions for the paper width guide 5 to the cassette case 1, and by selecting the attachment position, the opposing distance B of the paper width 5 to the paper width guide 4 can be set to B5 size, A4 size,
Matches the width of letter and legal size paper. A first detection target piece 19 and an opening 20 having a length approximately twice that of the first detection target piece 19 are formed on one side of the cassette case 1. The first detection target piece 19 is surrounded by a groove 21 and is continuous with the side surface of the cassette case 1 via a strip 22 in the groove 21. Further, an elastic piece 23 facing inwardly from the first detection piece 19 and the opening 20 is formed with its lower end continuous with the bottom of the cassette case 1. Further, a second detection target piece 24 having a size substantially equal to that of the first detection target piece 19 is slidably fitted into the opening 20 . This second detection target piece 24 is integrally formed with a U-shaped locking piece 25 with an opening at the lower end that elastically clamps the elastic piece 23, and a knob 26 that projects upward. Elastic piece 23
There are stoppers 27 located on both sides of the upper edge that abut against the locking piece 25, and a rib 28 located at the center of the side surface.
is formed. 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 10 into the holders 12 and 15, for A4 size paper, insert the partition plate 10 into the holders 14 and 17, and for letter size paper, insert the partition plate 10 into the holders 14 and 17. 10 is inserted into the holding parts 13 and 16, and if the paper is of legal size, the partition plate 10 is removed from the cassette case 1, and the rear end of the paper is positioned by the rear end inner surface 18 of the cassette case 1. Since the paper widths of the letter-size paper and the legal-size paper are the same, the facing interval B of the paper width guides 4 and 5 is also the same, so that the common cassette case 1 is replaced, and only the attachment of the partition plate 10 is selected. When the cassette case 1 is installed in the printer, the size of the paper to be used is detected by the first and second detection switches 29 and 30, which are the first and second detectors provided on the printer side. ,
As shown in FIG. 4a, in the cassette case 1 containing B5 size paper, a window 31 is formed by folding the strip 22 and cutting out the first detection target piece 19. As shown in FIG. 4b, in the cassette case 1 containing A4 size paper, the first detection target piece 19 is cut out to form a window 31, and the second detection target piece 24 is inserted into the opening 20.
Slide the inside and shift the position from directly below the window 31. As shown in FIG. 4c, the cassette case 1 containing letter-sized paper leaves the first detected piece 19 and slides the second detected piece 24 inside the opening 20 to reach the first detected piece. Shift it from directly below the detection piece 19. Cassette case 1, which stores legal size paper, is in the fourth
As shown in Figure d, leaving the first detected piece 19,
The second detection target piece 24 is slid within the opening 20 and moved directly below the first detection target piece 19 . Therefore, the always-on detection switch 29,3
If 0 is used, the first detection switch 29 will be turned off when the actuator 29a is pressed by the first detected piece 19, and the second detection switch 3 will be turned off.
0 is the actuator 30a on the second detected piece 24.
Turns off when is pressed. That is, as shown in Table 2 on the next page, a combination of signals for identifying the paper size is obtained from the operations of the detection switches 29 and 30.

[Table] In this way, for B5, A4, legal size, and letter size paper with different paper widths, the first detection piece 1
9 and the position of the second detected piece 24. Depending on the paper to be stored, the second detected piece 19 may be left or removed.
After determining the position of paper 4, the cassette case 1 is used exclusively for 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 selecting the attachment of the partition plate 10. In this case, since the first detection target piece 19 is also required, the paper can be automatically identified by simply changing the position of the second detection target piece 24. In addition, when fitting the second detected piece 24 into the opening 20, the locking piece 25 is inserted into the elastic piece 23 while the elastic piece 23 is deformed inside the cassette case 1 as shown in FIG. 5a. As shown in FIG.
0 is fitted. Therefore, assembly work is easy. In addition, in order to slide the second detection target piece 24 within the opening 20, as shown in FIGS. 6a and 6b, grip the knob 26 and slide the locking piece 25 along the elastic piece 23. . At this time, the stopper 27 prevents the locking piece 25 from falling off from the elastic piece 23. Further, the locking piece 25 receives resistance from the rib 28 when sliding, but it overcomes the rib 28 due to elastic deformation. That is, the rib 28 moderates the sliding movement of the locking piece 25. Effects of the invention Since this invention is constructed as described above, the partition plate can be fitted into any holding part depending on the type of paper stored in the cassette case, but the strips can be folded depending on the paper stored in the cassette case. selectively removes the first detected piece, and the first detector detects the presence or absence of the first detected piece, and separates two types of paper, one in the legal and letter size groups and the other group. By selectively facing a second detected piece to a second detector and detecting the presence or absence of the second detected piece by the second detector, paper sheets in the same group can be identified. This has the effect that a cassette case for storing legal size paper and letter size paper having the same paper width can be used in common.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is an exploded perspective view of the main parts, Figure 2 is a plan view, Figure 3 is a partially sectional side view, Figures 4 a, b, c,
d is an enlarged side view showing the presence and removal of the first detected piece and the selected position of the second detected piece; FIGS. FIGS. 6A and 6B are enlarged longitudinal sectional front views showing the assembly order of the second detection piece, and FIGS. 6A and 6B are perspective views showing the sliding movement of the second detection piece in an enlarged manner. 1... Cassette case, 4, 5... Paper width guide,
10... Partition plate, 12-17... Holding part, 19...
...first detection piece, 20...opening, 21...groove,
22... Strip, 24... Second detected piece, 29...
...first detection switch (first detector), 30...
...Second detection switch (second detector).

Claims (1)

[Scope of Claim for Utility Model Registration] A cassette case is provided for storing legal size and letter size paper and two types of paper of other sizes, each with their paper widths differentiated by a paper width guide, and the cassette case is provided with a cassette case for storing paper of legal size and letter size, and two types of paper of other sizes, respectively, and the cassette case is provided with a cassette case for storing paper of legal size and letter size, and two types of paper of other sizes, respectively, with the paper widths being differentiated by paper width guides, A holding portion, into which a partition plate abutting the rear edge is removably fitted, is positioned and formed at a position corresponding to the length of the paper, and the cassette case is surrounded by a groove, and the holding portion is formed in a position corresponding to the length of the paper. a removable first detection piece that is continuous as a part of the outer wall of the cassette case and faces the first detector; an opening having an area of
A paper feed cassette characterized in that a second detection target piece having an area approximately half of the opening and selectively facing the second detector is provided so as to be slidable along the opening.