JPH06247608A - Discharge sheet stacker for sheet processor - Google Patents

Abstract

(57) [Summary] [Purpose] In a paper discharge stacking device, it is easy to take out processed sheets stacked on the back side from the front side. [Structure] A vertically long guide recess 31a is provided in a pressure plate 31 of a stack device body 30. A pulling member 45 having a long plate shape is slidably attached to the guide recess 31a. The pulling member 45 is provided with an upward grip portion 45b at one end of the front side a and an upward end fence portion 45c at the other end. Then, when taking out the stacked originals (sheets), the picking portion 45b is picked up and the pulling member 45 is slid to the front side a so that the stacked originals are pulled up by the end fence portion 45c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a printer, a copying machine,
The present invention can be applied to a sheet processing device such as a printing machine or an image reading device that supplies a sheet such as a sheet of paper or a document and performs processing such as printing, transfer, printing, and image reading. More specifically, the present invention relates to a sheet stacking device that stacks processed sheets in such a sheet processing device.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a discharge stacking apparatus of this type is provided with a tray-shaped stacking apparatus main body 1 on which a pair of side fences 2 ... 2 is provided so as to be movable in a direction perpendicular to the sheet discharge direction a. Then, the paper discharge roller 3 is provided on the back side opposite to the front side (front side) indicated by the arrow b. Therefore, when stacking the processed sheets S, the side fence 2
Move 2 and position. After that, the processed sheets S are discharged in the direction a by the discharge rollers 3 and sequentially stacked on the stacking apparatus main body 1 between the side fences 2 and 2. Then, after stacking, the stack sheet S was taken out from the front side b.

[0003]

However, conventionally, there has been a problem that it is difficult to take out a sheet stacked on the back side of the stacking apparatus main body 1 from the front side b like a small size sheet.

Therefore, an object of the present invention is to make it easy to take out the processed sheets stacked on the back side from the front side in such a paper discharge stacking apparatus.

[0005]

Therefore, the present invention provides
For example, as shown in the illustrated embodiment below, in a sheet discharge stacking device 11 of a sheet processing device for stacking processed sheets such as image-read originals G, a pulling member that pulls the stacked sheets toward the front side a. Four
5, the stack device main body 30 is slidably provided.

According to a second aspect of the present invention, for example, as shown in the following illustrated embodiment, in the sheet stacking device 11 of the sheet processing apparatus according to the first aspect, the attracted pulling member 45 is returned to its original position. It is characterized by comprising a biasing member such as a biasing spring 48 that returns.

[0007]

In this invention, when the stacked sheets are taken out, the pulling member 45 is slid to pull the sheets toward the front side a.

According to the second aspect, after the sheet is taken out, the pulling member 45 is returned to the original position by the biasing member.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 6 is a schematic configuration diagram of an image reading apparatus including a paper discharge stacking apparatus according to an embodiment of the present invention.

Reference numeral 10 in the figure denotes the main body of the image reading apparatus. The sheet stacking device 11 of the present invention is provided on the device body 10. Further, an automatic document feeder 12 is detachably mounted on the back side opposite to the front operation side (front side) of the apparatus main body 10 indicated by an arrow A in the figure.

The device body 10 has a short first
A contact glass 14 and a long second contact glass 15 are provided. In addition, inside the long light source 16,
It is mounted on the first traveling body (not shown) together with the mirror 17. The other mirrors 18 and 19 are also mounted on the second traveling body. In FIG. 6, reference numeral 20 is an image forming lens, and 21 is a photoelectric conversion element.

The automatic document feeder 12 includes a document placing table 24 on the document feeder main body 23 above the paper ejection stack device 11.
Attach. A push-up arm 25 is rotatably provided on the document placing table 24, and the push-up arm 25 pushes up the document G from below and presses it against the paper feed roller 26. Further, inside the document feeder main body 23, a reversing conveyance path 27 is provided, and the reversing conveyance path 27 is provided with a plurality of pairs of conveyance rollers 28, respectively. A pair of paper discharge rollers 29 is provided at the tip of the reverse conveyance path 27 in the conveyance direction A.

The paper discharge stacking device 11 comprises a stacking device body 30 placed on the second contact glass 15. As shown in FIG. 1, the stacking device main body 30 has a pressure plate 31 in which the four-sided peripheral edge of a rectangular plate material is bent downward, and a backing sheet material is provided in the pressure plate 31 via a sponge material (not shown), for example. Then, the stack device body 3
0 is provided with a fulcrum on the discharge roller 29 side of the pressure plate 31 and can be opened and closed from the front side a.

The stacking device main body 30 includes a pressure plate 31.
A vertically long guide recess 31a is provided at the center of the upper surface of the above, and a horizontally long step 31b is provided in the width direction C perpendicular to the guide recess 31a. A plurality of guide ribs 31c are provided on both sides of the guide recess 31a on the front side of the step portion 31a, and guide grooves 31d are provided on both sides of the guide recess 31a in the width direction C on the back side upper surface. Then, the side fences 32, 32 are respectively provided with the guide grooves 31.
Mounted on the pressure plate 31 movably along d.

The side fences 32, 32 are each composed of a vertical guide plate portion 33 and a horizontal plate portion 34 extending inward from the lower edge thereof. Then, the upper edge side and the tip end side are both opened outward to form the tapered portion 32a. In these side fences 32, 32, a downward short shaft (not shown) is provided on the horizontal plate portion 34, and a rack 35 is attached to the tip of the short shaft in parallel with the guide groove 31d as shown in FIG. Become. Then, the side fences 32, 32 are made movable by interlocking the respective racks 35 via the pinions 36 and interlocking with each other.

As shown in FIG. 3, the central guide recess 31a is composed of a front side recess 31e and a back side recess 31f with a step 31b as a boundary, and hooks parallel to the side edges of the front side recess 31e. The oblong holes 38, 38 and 39, 39 for locking are provided, and the oblong holes 40, 40 for hooking parallel to each other are also provided on the side edge of the inner recess 31f. And the long hole 38
Elongated clearance holes 41 are provided between the holes 38 in parallel with each other.

The guide recess 31a of the pressure plate 31
Then, the pulling member 45 is arranged. Attracting member 45
Has a longitudinal plate shape, a stepped portion 45a is provided substantially in the center of the stepped portion 45a so as to match the shape of the guide recessed portion 31a, and an upward picking portion 45b is provided at one end on the front side of the stepped portion 45a, while the other end is provided with an upward facing portion. An end fence part 45c is provided. Also,
The knob 45b, the step 45a, and the end fence 45c
A pair of hooks 45d
45e and 45f are provided. Then, as shown in FIG.
A hooking protrusion 45g is provided downward near the hook 45e. Then, each hook part 45d, 45e, 45
f is hooked on the edges of the hooking elongated holes 38, 39, 40 respectively, and the hooking protrusion 45g is inserted into the escape hole 41 to slidably attach the pulling member 45 to the guide recess 31a.

As shown in FIG. 5, the pulling member 45 is provided with a biasing spring (biasing member) 48 on the hooking protrusion 45g.
Is always urged toward the rear side of the paper discharge roller 29, and the stepped portion 45a is brought into contact with the stepped portion 31b to stop.
The other end of the biasing spring 48 is hooked on a downward hooking projection 49 provided on the pressure plate 31. In addition, reference numeral 50 in FIG.
This is a static elimination brush for eliminating static electricity by contacting the leading edge of the document G discharged by the discharge roller 29 with the leading edge.

In the image reading apparatus described above, the document G
When the image reading is performed, the side fences 32, 32 are moved and positioned in advance according to the document size. Then, the original G is placed on the original placing table 24 shown in FIG. 6 with the original face up, and the original G is set and the paper feed roller 26 is rotated and sent out. Then, each of the transport rollers 28 feeds it in the direction A through the reverse transport path 27 and transports it on the first contact lens 14. At that time, while moving the first and second traveling bodies along the first contact glass 14,
The light from the light source 16 is transmitted through the first contact glass 14 and applied to the document G, and the reflected light is reflected by the plurality of mirrors 17, 18.
The light is sequentially reflected at 19, passed through the imaging lens 20, and is put into the photoelectric conversion element 21. Then, the image information on the document surface of the document G is read.

Then, the read document G is discharged in the direction B by the paper discharge roller 29 above the end fence portion 45c and sequentially stacked on the pressure plate 31. Then, at the time of this stacking, the front end of the document G falling from the paper discharge roller 29 is guided by the taper portion 32a so that the side fences 32, 32
Lead in the meantime. Then, with the side fence 32, 32, the manuscript G
Align the side edges of the and load. Thus, it is possible to prevent a problem in which the stack of documents G does not fit well between the side fences 32, 32, and the documents G stick out and come apart or a paper jam occurs between the paper discharge rollers 29.

When taking out the stacked originals G, the picking portion 45b is picked up and the pulling member 45 is slid to the front side a so that the stacked originals G are pulled up by the end fence portion 45c. Then, after the stack document G is taken out and then the finger is released from the grip portion 45b, the pulling member 45 is automatically returned to the original position by the biasing spring 48.

Further, the illustrated image reading apparatus can manually set the originals G one by one and read the image information. In that case, from the front side a, the stack device main body 30
To open the original G on the second contact lens 15. After setting, the stacker body 30 is closed and the pressure plate 3
At 1, the document G is pressed through the backing sheet material. After that, the first and second traveling bodies are moved to move the light source 16
And the lenses 17, 18, and 19 are moved to the front side a as shown by the chain line in FIG. Then, the light from the light source 16 is transmitted through the second contact glass 15 and applied to the original G, and the reflected light is reflected by the plurality of mirrors 17 ・ 18 ・ 1 in the same manner as described above.
The image information of the document G is read by being sequentially reflected at 9, and transmitted through the imaging lens 20 and put into the photoelectric conversion element 21.

[0023]

Therefore, according to the present invention, when the stacked sheets are taken out in the paper discharge stacking apparatus, the pulling member can be slid to pull the sheets toward the front side. Can be easily taken out from the front side.

According to the second aspect of the present invention, it is possible to automatically return the pulling member slid to the front side to the original position by the biasing member, thereby eliminating the trouble of returning the pulling member.

[Brief description of drawings]

FIG. 1 is a perspective view of a sheet discharge stack device and a sheet discharge roller according to an embodiment of the present invention.

FIG. 2 is a plan view of the paper discharge stack device and paper discharge rollers.

FIG. 3 is an exploded perspective view of a part of a stacking device main body and a drawing member of the paper discharge stacking device.

FIG. 4 is a partial perspective view showing the bottom side of the pulling member.

FIG. 5 is a central vertical cross-sectional view of this paper ejection stack device including the pulling member.

FIG. 6 is an overall schematic configuration diagram of an image reading apparatus including the paper discharge stack device.

FIG. 7 is a schematic perspective view of a conventional paper discharge stack device.

[Explanation of symbols]

 11 Paper Ejection Stacking Device 30 Stacking Device Main Body 45 Pulling Member 48 Biasing Spring (Biasing Member) a Front Side G Document (Sheet)

Claims (2)

[Claims] 1. A discharge stacking device for a sheet processing device for stacking processed sheets, comprising a pulling member for pulling the stacked sheets toward the front side slidably in the stacking device main body. Stack device. 2. A discharge stacking device for a sheet processing device, comprising a biasing member for returning the attracted member to the original position.