JPH052507Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention relates to a paper feed cassette claw, and more specifically, to a paper feed cassette claw that allows sheets to be reliably taken out one by one.

<Prior Art> Conventionally, paper feed cassette claws are attached to the paper feed cassette to ensure that sheets can be taken out one by one and to prevent problems such as jams.

Conventionally, such a paper feed cassette claw has a structure in which a paper feed cassette claw main body 36' is attached to the front surface of a guide plate 31' so as to be slidable up and down, as shown in FIG. As shown in FIG. 1, there was a structure in which a paper feed cassette claw body 36'' was attached to the back side of a paper contact plate 31'' formed in a substantially box shape so as to be slidable up and down.

<Problems to be solved by the invention> With the above configuration, when no paper P is set in the paper feed cassette 1',
Although the paper feed cassette claw main body 36' can be freely slid up and down, when the paper feed cassette 1' is installed in a tilted position in a copying machine, etc. The paper P set inside the paper feed cassette claw body 3 due to its own weight.
Since the front surface of the paper feed cassette claw body 36' is pressed against the front surface of the paper feed cassette claw body 36', the vertical slide of the paper feed cassette claw body 36' is obstructed in the paper setting state where free vertical sliding must be achieved. This results in the inconvenience of having to take out the paper P.

In addition, in the above configuration, as shown in FIG. 8, most of the paper P set in the paper feed cassette 1'' comes into contact with the front surface of the paper contact plate 31'',
Since only some of the papers located at the top directly contact the paper feed cassette claw body 36'', the paper feed cassette claw body 36'' is smaller than the structure described above.
However, since the weight of the paper feed cassette claw main body 36'' is very small, it is still not possible to eliminate the inconvenience of taking out two or more sheets of paper at a time. In addition, a step may occur at the leading edge of the paper P, causing the paper to become jammed between the paper feed cassette claw body and the upper part of the paper contact plate, resulting in a paper feed failure.

In particular, in a universal cassette that can be applied to a wide variety of paper sizes, it is not possible to form a special support part to support the leading edge of the paper.
The above disadvantages become noticeable.

This idea was made in view of the above problems, and the paper feed cassette claw body can be freely slid up and down according to the amount of paper, and the paper feed cassette claw can take out only one sheet of paper at a time. is intended to provide.

<Means for Solving the Problems> In order to achieve the above object, the paper feed cassette claw of this invention includes a paper feed cassette claw main body 36, a paper abutting member 31 against which the leading edge of the paper comes into contact, The paper abutting member 31 is formed with a notch 32 extending downward from its upper end 31a, and the paper feed cassette claw main body 36 is attached to the back side of the paper abutting surface 39 of the paper abutting member 31 so as to be vertically slidable. At the top thereof, it protrudes from the paper contact surface 39 of the paper contact member 31, and with the paper feed cassette claw main body 36 positioned at the lower end of the slide, at least the lower surface is located below the upper end 31a of the paper contact member 31. The claw portion 38 is formed in a bent manner, and in a predetermined range following the claw portion 38, the entire paper feed cassette claw body 36 is introduced into the cutout portion 32 with the claw main body 36 positioned at the lower end of the slide. , a protrusion 40 is formed that is substantially flush with the paper contacting surface 39 of the paper contacting member 31, and the upper end 31a position of the paper contacting member 31 is approximately aligned with the leading edge of the uppermost paper when the paper feeding cassette is installed. The slide upper end position of the paper feed cassette claw main body 36 is such that the claw portion 38 protrudes from the upper end 31a of the paper abutting member 31, and the lower end 40 of the protruding portion 40
a is set within a range that does not protrude from the upper end 31a of the paper abutting member 31.

<Function> With the above configuration, the upper end 31a position of the paper contact member 31 is set to be almost flush with the leading edge of the uppermost paper when the paper feed cassette is installed, and the paper feed Cassette claw body 36
is located at the lower end of the slide, at least the lower surface of the claw portion 38 is located below the upper end 31a of the paper abutting member 31. Therefore, when the paper feed cassette is installed at an angle, almost all of the paper will fall under its own weight. It comes into contact with the paper contact surface 39 of the paper contact member 31. Therefore, there is no possibility that the vertical sliding of the paper feed cassette claw main body 36 will be obstructed by the paper.

In addition, in a predetermined range adjacent to the claw portion 38 of the paper feed cassette claw body 36, the whole notch 3 is located in a state where the paper feed cassette claw body 36 is located at the lower end of the slide.
A protrusion 40 is formed that is substantially flush with the paper contact surface 39 of the paper contact member 31 introduced into the paper feed cassette 2, and the slide upper end position of the paper feed cassette claw body 36 is such that the lower end 40a of the protrusion 40 is Since the paper abutment member 31 is set in a range that does not protrude from the upper end 31a, even if a part of the upper paper directly contacts the paper feed cassette claw body 36, the claw portion 3
8 and the upper end 31a of the paper abutting member 31 can be prevented from being jammed.

<Examples> Hereinafter, examples will be described in detail with reference to the accompanying drawings showing examples.

FIG. 4 is a perspective view showing the paper feed cassette, in which a cover 2 is attached to the upper part of the paper feed cassette main body 1 so as to be openable and closable. A paper feed cassette claw 3 is attached to a predetermined position at the leading end, and a paper push-up plate 5 biased upward by a spring 4 is also attached. Note that 21 is a notch formed at a predetermined position at the tip of the cover 2, which allows the paper feed roller 6 (see FIG. 3) to directly contact the paper P (see FIG. 3).

FIGS. 1 and 2 are diagrams showing the paper feed cassette claw 3, and the paper abutment plate 3 as a paper abutment member.
1 and a paper feed cassette claw body 36.

The paper contact plate 31 has both sides bent toward the front end of the paper cassette to form a box shape, and the lower edge bent toward the rear end of the paper cassette to form an attachment portion 34 to the paper cassette main body 1. A rectangular notch 32 extending downward is formed at the upper end 31a, and a pin 33 is attached at a predetermined position in the center, so that the pin 33 projects toward the front end of the paper feed cassette. Note that 35 is a guide portion that guides the side edges of the paper, and is formed by bending a predetermined position of the mounting portion 34 upward.

The paper feed cassette claw main body 36 is attached to the paper contact plate 3
It is a plate material attached to the back surface side of 1 so as to be vertically slidable, and has a window hole 37 formed at a predetermined position to engage with the pin 33 to regulate the vertical sliding distance. Then, the upper side is bent at right angles to the rear end side of the paper feed cassette to form a claw portion 38, and the claw portion 38
A predetermined area below the paper feed cassette is made to protrude toward the rear end side of the paper feed cassette, and the front side is the contact surface 39 of the paper contact plate 31.
It is configured as a protrusion 40 that is substantially flush with the surface. This protrusion 40 is connected to the paper feed cassette claw main body 36.
is positioned at the lower end of the slide, and the entire body is introduced into and engaged with the notch 32.

The upper end 31a of the paper contact plate 31 is set to be substantially flush with the leading edge of the uppermost paper when the paper feed cassette is attached (see FIG. 3). The length of the window hole 37 in the vertical direction is such that the claw portion 38 can protrude from the upper end 31a of the paper contact plate 31 when the paper feed cassette claw body 36 is positioned at the upper end of the slide.
When the paper feed cassette claw main body 36 is located at the lower end of the slide, at least the lower surface of the claw portion 38 is set in a range that is located below the upper end 31a of the paper abutting member 31. Further, the protrusion 40 of the paper feed cassette claw body 36 and the upper end 3 of the paper contact plate 31
Regarding the relationship with 1a, paper feed cassette claw body 3
6 is located at the upper end of the slide, the lower end 40a of the protrusion 40 is prevented from protruding from the upper end 31a of the sheet contact plate 31.

With the above configuration, when a desired number of sheets of paper P are set inside the paper feed cassette main body 1 and installed in a copying machine etc. in an inclined state, the leading edge of the paper P will be as shown in FIG. Almost only the contact surface 39 of the paper contact plate 31 is contacted, and the paper feed cassette claw body 3
6 is held in a state where it can freely slide up and down, it is possible to ensure that the claw portion 38 is supported by the uppermost paper P, and by driving the paper feed roller 6, it is possible to ensure that the paper P is You can take them out one by one. Furthermore, since the protruding portion 40 of the paper feed cassette claw main body 36 engages with the notch 32 of the paper contact plate 31, it is possible to reliably prevent the paper feed cassette claw main body 36 from swinging. It is possible to reliably take out sheets one by one. Moreover, since the lower end 40a of the protrusion 40 does not protrude from the upper end 31a of the paper contact plate 31 when the paper feed cassette claw main body 36 is in the highest position, the protrusion 40 does not touch the paper. Board 31
Coupled with the fact that it is almost flush with the paper contact surface 39 of section 38 and the upper end 3 of the paper contact plate 31
It is possible to prevent paper from getting jammed between the paper and the paper 1a. Therefore, the paper P can be taken out even more reliably.

Note that this invention is not limited to the above-described embodiment; for example, instead of preventing the swinging by the engagement between the paper feed cassette pawl body 36 and the notch 32, the swinging may be prevented by other structures. In addition to this, it is also possible to improve the slippage of the paper by forming a polyethylene terephthalate coating on the contact surface 39 of the paper contact plate 31 or by applying an alumite treatment, without otherwise changing the gist of this invention. Various design changes are possible within the scope.

<Effects of the invention> As described above, with this invention, the paper feed cassette claw body can freely slide up and down, and there is no risk of the leading edge of the paper getting stuck between the claw part and the paper contact member, so the paper This has the unique practical effect of being able to reliably take out one sheet at a time.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the paper feed cassette claw, Fig. 2 is a vertical cross-sectional view of the main part of the paper feed cassette claw, Fig. 3 is a longitudinal cross-sectional view of the main part showing the operating state, and Fig. 4 is a perspective view of the paper feed cassette. 5 and 6 are perspective views showing the conventional example, and FIGS. 7 and 8 are longitudinal cross-sectional views illustrating the operation of the conventional example, respectively. 31...Paper contact plate, 31a...Top end, 32...
...Notch, 36...Paper feed cassette claw body, 38...
...Claw part, 39...Paper contact surface, 40...Protrusion part,
40a...Lower end.

Claims (1)

[Scope of Claim for Utility Model Registration] In the paper feed cassette claw 3 that makes it possible to reliably take out multiple sheets of paper one by one from the paper feed cassette, the paper feed cassette claw main body 36 and the paper whose leading edge of the paper comes into contact with each other. The paper abutting member 31 has a notch 32 extending downward from its upper end 31a, and the paper feed cassette claw main body 36 has an abutting member 31.
It is attached to the back side of the paper contact surface 39 of the paper contact member 31 so as to be able to slide up and down, and the upper part thereof protrudes from the paper contact surface 39 of the paper contact member 31. A claw portion 38 is bent and positioned below the upper end 31a of the paper abutting member 31, and a paper feed cassette claw main body 36 is located at the lower end of the slide in a predetermined range below the claw portion 38. A protrusion 40 is formed which is substantially flush with the paper contact surface 39 of the paper contact member 31, which is introduced into the notch 32 in its entirety in the paper contact member 31, and the upper end 31a position of the paper contact member 31 is aligned with the paper contact surface 39 of the paper contact member 31. When the paper cassette is installed, it is set to be almost flush with the leading edge of the uppermost paper, and the slide upper end position of the paper feed cassette claw body 36 is such that the claw portion 38 protrudes from the upper end 31a of the paper contacting member 31, and In addition, the lower end 40a of the protrusion 40 is connected to the paper abutting member 31.
A paper feed cassette claw characterized in that the claw is set within a range that does not protrude from the upper end 31a of the paper feed cassette claw.