JPH0720123Y2 - Paper stacker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to the structure of a paper stacker used in information equipment such as printers and copying machines.

(Prior Art) Conventionally, a printer device, for example, an electrophotographic printer device, has two systems, a face-up paper discharge that discharges a print surface upward and a face-down paper discharge that discharges a print surface downward in page order. Many. Of these, the face-down stacker is frequently used, and when the face-down stacker is used, the face-up stacker is folded along the main body of the apparatus. This will be described with reference to the drawings. FIG. 8 is a side view of the main body of the apparatus equipped with the conventional paper stacker. The sheet stacker 2 is folded along the apparatus main body 1 by the rotating unit 5. The sheet stacker 2 includes a main body 3, a sheet receiver 4, and a rotating unit 6. Set the paper receiver 4 in the paper feeding direction D
In the case of expanding to, the main body 3 is first rotated in the direction of arrow A. The main body 3 rotates 90 ° and hits a stopper (not shown) to stop. Next, when the sheet receiver 4 is rotated in the direction of arrow B, it is rotated by a predetermined angle and stopped by a stopper (not shown) provided on the rotating portion 6. In the case of closing, first, the sheet receiver 4 is rotated in the direction of the arrow C to be superposed on the main body 3, and then the main body 3 is rotated in the direction opposite to the direction of the arrow A so as to follow the main body 1 of the apparatus.

(Problems to be solved by the invention) By the way, according to the conventional stacker, if the height of the printer device is lowered, the main body and the paper receiver are also shortened. I won't. Therefore, the number of parts increases and the mechanism becomes complicated,
There is a problem that it is difficult to use because the number of folding times increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper stacker that does not need to shorten the main body and the paper receiver or make the paper receiver multi-stage even if the height of the printer device is low.

(Means for Solving the Problems) In order to achieve the above object, in the paper stacker of the present invention, the stacker main body has an L-shaped cross section at the bottom and side, and a pivot is provided on the bottom. Further, a stopper is provided on the side portion, the sheet receiver is flat plate-shaped, and a fitting hole for engaging with a rotation fulcrum of the main body is provided at one end portion, and the stopper is engaged when it is rotated and expanded. An engagement portion and a second engagement portion that engages with the stopper when closed are provided.

(Operation) In the paper stacker configured as described above, the paper receiver horizontally rotates with respect to the main body about the rotation fulcrum, and when closed, the first receiver provided at one end of the paper receiver. The engaging portion of (1) engages with the stopper of the main body, and when expanded, the second engaging portion provided at one end of the sheet receiver engages with the stopper of the main body.

Therefore, the paper stacker according to the present invention is not affected by the height of the printer device, and even if the height of the printer device is lowered, the main body and the paper receiver do not have to be shortened so that the paper receiver has a multi-stage structure.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings.
The elements common to the drawings are given the same reference numerals.

First Embodiment FIG. 1 is a perspective view of a paper stacker according to a first embodiment of the present invention. The paper stacker 7 is composed of a main body 8, a paper receiver 15, and posts 22 as pivot points. The integrally molded main body 8 includes a bottom portion 9, a rear side portion 10, a right side portion 11 and a left side portion 12,
When cut in the paper feed direction D, the bottom portion 9 and the rear side portion 10 have an L-shaped cross section, and when cut in a direction perpendicular to the paper feed direction D, the bottom portion 9, the right side surface 11, and the left side surface 12 The cross section has a U shape. The bottom portion 9 is provided with a post 22 as a pivot point. In addition, a stopper 19 is provided on the rear side portion 10 corresponding to the post 22.
Is provided. Further, the right side portion 11 and the left side portion 12 are provided with rotating portions 13 and 14, respectively, which will be described later. The paper receiver 15 has a flat plate shape, and one end 16 has a hole for fitting with the post 22 of the main body 8.
23, a rotation stopper 17 that abuts the stopper 19 of the main body 8, a first engaging portion 18 that engages with the lower surface of the stopper 19 with a frictional force when expanded, and a frictional force with the lower surface of the stopper 19 when closed. A second engaging portion 20 for engaging is provided. In this embodiment, the end of the one end 16 is formed into an arc including the first engaging portion 18 and the second engaging portion 20. The center of the circular arc is the same as the center of the hole 23, and the radius of the circular arc is such that the ends of the circular arc do not contact the rear side portion 10 and the right side portion 11 of the main body 8. FIG. 2 is a side view of the apparatus body in which the sheet stacker of the first embodiment is mounted. The sheet stacker 7 is rotated by the rotating portions 13 and 14 provided on the right side portion 11 and the left side portion 12 of the apparatus body 1 as described above. It is rotatably supported on the shaft 24.

Next, the operation will be described. When the paper stacker 7 is not used, the paper receiver 15 is housed in the apparatus main body 1 in a state as shown by the one-dot chain line in FIG. . At this time, the second engagement portion 20 of the paper receiver 15 is engaged with the stopper 19 of the main body 8.
When the sheet stacker 7 is used, it is rotated in the direction of arrow A as shown in FIG. 2, and the rear side portion 10 of the main body 8 is abutted against a stopper (not shown) of the apparatus main body 1. Further, as shown by the solid line in FIGS. 1 and 2, the other end 21 is rotated in the direction of arrow E until the rotation stop 17 provided at one end 16 of the paper receiver 15 hits the stopper 19 of the main body 8. At this time, the first engaging portion 18 of the paper receiver 15 is engaged with the stopper 19 of the main body 8.

In this embodiment, an arc including the first engaging portion and the second engaging portion is provided at one end of the paper receiver, but the first engaging portion and the second engaging portion are left and the space between them is provided. It may be cut out.

Further, in the present embodiment, the rotation stopper is provided on the paper receiver, but since a frictional force acts between the lower surface of the stopper and the first engaging portion and the second engaging portion, the rotation stopper may not be provided.

According to the first embodiment, since there is only one paper receiver, the structure is simple, and the number of times of expanding and closing is only one.
Suitable for small size paper.

Second Embodiment FIG. 3 is a perspective view of a paper stacker according to the second embodiment. The paper stacker of this embodiment will be described as a molded product. The sheet stacker 25 includes a main body 26, a first sheet receiver 27, a second sheet receiver 28, a first post 29 as a first rotation fulcrum, and a second post 30 as a second rotation fulcrum. Become. The integrally molded body 26 includes a bottom portion 31, a rear side portion 32, and a right side portion.
33 and a left side portion 34, the bottom portion 31 and the rear side portion 32 have an L-shaped cross section when cut in the paper feeding direction D, and the bottom portion 31 and the right side portion when cut at a right angle to the paper feeding direction D. 33 and the left side portion 34 form a cut U-shape. The bottom portion 31 has a first post 29 and a second post 30 that are separated from each other in a direction perpendicular to the sheet feeding direction D.
And. The rear side portion 32 is provided with a first stopper 35 and a second stopper 36 corresponding to the first post 29 and the second post 30, respectively. The first stopper 35 has a reinforcing rib 35.
Provide a and 35b. Further, the rear side portion 32 has a first portion between the rear side portion 32 and the bottom portion 31.
Arcuate reinforcement wall corresponding to post 29 and second post 30
A reinforcing portion 37 including 39 and a plurality of ribs 38 is provided. Right side
33 and the left side portion 34 are provided with holes 13 and 14 which are rotatably attached to a shaft of an apparatus body (not shown). First paper tray 2
Reference numeral 7 denotes a flat plate shape, and at one end 40, a hole 41 fitted into the first post 29, a rotation stopper 42 that abuts the first stopper 35, and the first stopper 35 of the first stopper 35 when expanded with respect to the main body 26. There is a first engaging portion 43 that frictionally engages the lower surface 35c and a second engaging portion 44 that frictionally engages the lower surface 35c of the first stopper 35 when closed to the body 26. . In this embodiment, the end of the one end 40 is formed into an arc including the first engaging portion 43 and the second engaging portion 44. The center of the circular arc is the same as the center of the hole 41, and the radius of the circular arc is such that the end of the circular arc does not contact the arcuate reinforcing wall 39 when rotated. Further, the other end portion 45 is provided with a relief 46 so as not to hit the second post 30 when closed with respect to the main body 26, and has an arc so that the end does not hit the arcuate reinforcing wall 39. Further, ribs 47a, 47b, 47c, 47 from the one end portion 40 to the other end portion 45 are provided to reduce the frictional resistance to the paper and prevent the warpage.
Provide d. The second paper receiver 28 has a flat plate shape and has one end 4
8 has a hole 49 fitted into the second post 30, a rotation stopper 50 that abuts against the second stopper 6 and a lower surface 36a of the second stopper 36 when it is expanded with respect to the main body 26 by frictional force. The second engaging portion 5 that engages the lower surface 36a of the second stopper 36 with a frictional force when the first engaging portion 51 is closed with respect to the main body 26.
There is 2. As shown in FIG. 4, the relationship with the second post 30 is such that it can be rotated by riding on a stepped portion 30a provided on the second post 30. Further, the end of the one end portion 48 is an arc having the same relationship as the one end portion 40 of the first sheet receiver 27. The other end portion 53 also has the same relationship as the other end portion 45 of the first paper receiver 27. However, it is not necessary to provide a relief. Also, ribs 54a, 54b, 54c, 54 provided from one end 48 to the other end 53
d has the same relationship as the first paper receiver 27.

Next, the operation will be described with reference to FIG. FIG. 5 is a perspective view of the sheet stacker with the sheet receiver closed. In this state, as in the first embodiment, the hole 1 of the right side portion 33 is provided in the apparatus main body (not shown).
3. The shaft is supported by the hole 14 in the left side portion 34. At this time, the first sheet receiver 27 and the second sheet receiver 28 are respectively the second sheet receivers shown in FIG.
The engaging portions 44 and 52 are engaged with the lower surface 35c of the first stopper 36 and the lower surface 36a of the second stopper 36. Next, when expanding the paper receiver, the other end portion 53 of the second paper receiver 28 is rotated in the direction of arrow G as shown in FIG. The one end portion 48 of the second sheet receiver 28 is rotated in the direction of the arrow H, the second engaging portion 52 is separated from the second stopper 36, and the first engaging portion 51 as shown in FIG.
Engages the second stopper 36. Then, the rotation stopper 50 hits the side surface of the second stopper 36, and the rotation is stopped. When the second paper receiver 28 was closed, one end 48 of the second paper receiver 28 was on the other end 45 of the first paper receiver 27, but when the second paper receiver 28 spreads out. There is nothing on the other end portion 45 of the first paper receiver 27. Therefore, the other end portion 45 of the first paper receiver 27 can be rotated in the direction of arrow I to be expanded.

In this embodiment, the second post is provided at the bottom of the main body, but as shown in FIGS. 6 and 7, the bottom 31, the right side 33 and the reinforcing wall 39 are provided.
A shelf 56 having a second post 57 may be provided therebetween.
With such a shape, it is not necessary to provide a relief in the first sheet receiver shown in FIG.

Further, as in the first embodiment, the end of the one end is the first engaging portion,
Although the circular arc includes the second engaging portion, the first engaging portion and the second engaging portion may be left and a gap may be formed between them.

Further, although the rotation stopper is provided on the sheet receiver, the rotation stopper may not be provided because a frictional force acts between the lower surface of the stopper and the first engaging portion and the second engaging portion.

In addition, in the embodiment, the first stopper of the main body and the paper receiver are provided.
Although the engaging portion and the second engaging portion are engaged with each other by frictional force, the convex portion is provided on the lower surface of the stopper, and the concave portion is provided on each of the first engaging portion and the second engaging portion. You may make it engage with a convex part and a concave part.

Further, although the sheet receiver is provided with the rotation stopper, the rib for preventing the warp may also be used as the rotation stopper.

According to the second embodiment, since two paper receivers are provided at the ends of the bottom of the main body, respectively, the paper receiving area is larger than that in the first embodiment, and even the paper long in the paper feeding direction can be reliably received. At the same time, even if a wide sheet of paper is received, both ends will not sag.

(Effects of the Invention) Since the present invention is configured as described above, it has the effects described below.

Since the paper tray can be horizontally opened and closed with respect to the main body, it is not necessary to shorten the main body and paper tray according to the height of the printer device, and to make the paper tray different in stages. Disappear. Further, since it is not necessary to use a multi-stage type, the number of parts is reduced and the mechanism is simplified. Further, since it is not a multi-stage type, the number of times of expanding and closing is small, and the troublesomeness is eliminated. Further, since it can be used as a general-purpose type, it is not necessary to design the paper stacker according to the height of the printer device, and the production management is simplified.

[Brief description of drawings]

FIG. 1 is a perspective view of a sheet stacker according to the first embodiment of the present invention, FIG. 2 is a side view of an apparatus body having the sheet stacker according to the first embodiment mounted, and FIG. 3 is a sheet stacker according to the second embodiment. Fig. 4 is a perspective view, Fig. 4 is an enlarged cross-sectional view taken along the line FF of Fig. 3, and Fig. 5 is a perspective view of a sheet stacker with the sheet receiver closed.
FIG. 6 is a partial view showing a modified example of the second embodiment, FIG. 7 is a sectional view taken along the line JJ of FIG. 6, and FIG. 8 is a side view of the apparatus main body equipped with a conventional paper stacker. is there. 1 ... Device main body, 2, 7, 25 ... Paper stacker, 3, 8, 26, 55 ... Main body, 4, 15 ... Paper receiver, 9, 31 ... Bottom part, 10, 32 ... Rear side part, 16,
40, 48 ... One end, 18, 43, 51 ... First engaging part, 19 ... Stopper, 20, 44, 52 ... Second engaging part, 21, 45, 53 ... Other end, 22 ...
Posts, 23, 41, 49 ... Holes, 27 ... First paper tray, 28 ... Second
Paper receiver, 29 ... First post, 30,57 ... Second post, 35 ... First stopper, 36 ... Second stopper, 43, 51
... first engaging portions, 44, 52 ... second engaging portions, 56 ... shelves.

Claims (2)

[Scope of utility model registration request] 1. A stacker body that is attached to and detached from the apparatus body,
In a paper stacker that can be rotated to expand the paper receiver in the paper feeding direction, the stacker body has an L-shaped cross section at the bottom and side, a rotation fulcrum is provided at the bottom, and a stopper is provided at the side. The paper receiver has a flat plate shape and has a fitting hole at one end that engages with the rotation fulcrum and closes with a first engagement portion that engages with the stopper when rotated and expanded. And a second engaging portion that engages with the stopper when the sheet stacker is opened. 2. A rotation fulcrum comprises a first rotation fulcrum and a second rotation fulcrum which are provided at the bottom of the main body so as to be separated from each other in the direction perpendicular to the sheet feeding direction, and the stoppers are respectively the first rotation fulcrum. Of the first body provided on the side portion of the main body corresponding to the rotation fulcrum and the second rotation fulcrum of
2. The paper receiver comprises a first paper receiver and a second paper receiver which are engaged with the first rotation fulcrum and the second rotation fulcrum, respectively. Paper stacker.