JP2000238954A - Sheet accumulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the neat accumulation of sheets even in case of a sheet- like carrying matter having any form, thickness or material by providing accumulation guides for guiding both side parts of the sheet to be carried on a sheet sliding surface at a setting angle for setting them mutually outward. SOLUTION: A sheet 9 is nipped between two vertical discharge rollers 2, carried out of a sheet carrying device 1, and accumulated in this sheet accumulating device 3. At this time, in the sheet accumulating device 3, the sheet 9 is smoothly taken by a pair of accumulation guides 4 arranged on both sides of the sheet 9 even if the discharge position of the sheet 9 is shifted from the center when discharged from the discharge rollers 2. Namely, since the accumulation guides 4 are formed so as to extend outward at a prescribed angle and contract at a prescribed angle in the carrying direction, all the sheets 9 are finally neatly vertically stacked about the center thereof and accumulated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a sheet stacking apparatus capable of orderly stacking sheets discharged from a sheet conveying apparatus (including a printer or the like).

[0002]

2. Description of the Related Art In the above-mentioned sheet conveying apparatus, when stacking flat and smooth sheets, thin sheets, and large-size sheets, the sheets cannot be neatly stacked in the stacking section due to sticking between the sheets. Cause clogging,
It is necessary to stop the sheet conveying device in order to prevent the breakage of the sheet conveying device or to prevent the breakage. Further, in order to avoid this, the stacking portion can be lowered and the stacking can be performed by dropping. However, stacking failure due to a broken or curled tip of the sheet has occurred. In order to make further improvements, the size and complexity of the sheet conveying device itself has been unfavorable.

[0003] References relating to the material of the sheet include JP-A-4-29659, JP-A-4-327982 and JP-A-4-327 filed by the present applicant.
983 publication. Further, as a document relating to a sheet conveying apparatus using the above-mentioned sheet, there is Japanese Patent Application No. 6-275183, also filed by the present applicant.

[0004]

SUMMARY OF THE INVENTION The present invention provides a compact stacking apparatus capable of orderly stacking sheets on a predetermined stacking apparatus regardless of the shape, thickness, and material of a sheet-like conveyed article. The purpose is to provide cheap.

[0005]

According to a first aspect of the present invention, there is provided a sheet stacking apparatus for stacking sheets conveyed from a sheet conveying apparatus on a sliding surface. A stacking guide for guiding both side portions is provided along the both side portions of the seat and on the sliding surface at an installation angle (α) facing outward from each other. According to this configuration, it is possible to orderly stack the sheet-like conveyed materials in the predetermined stacking device. In addition, the stacking guide is housed in a conventional stacking device, so that the stacking guide can be miniaturized. In addition, since the stacking guide can be obtained at low cost, the cost can be reduced. The invention according to claim 2 is characterized in that the stacking guide is slidable in the width direction according to the sheet size. According to this configuration, it is possible to deal with a sheet-like conveyed product of any size. The invention according to claim 3 is characterized in that the stacking guide is provided at a conveying direction angle (β) in which the bottom side of the stacking guide approaches the center of the sheet as it goes downstream. According to this configuration, it is possible to more reliably accumulate the sheet-like conveyed materials in the predetermined accumulating device. The invention according to claim 4 is characterized in that the stacking guide is installed with the installation angle α of 30 to 60 degrees and the transport direction angle β of 10 to 60 degrees.
According to this configuration, it is possible to most reliably and orderly accumulate the sheet-like conveyed materials in the predetermined accumulating device. further,
The invention according to claim 5 is characterized in that a convex portion is provided near the center of the seat on the sliding surface. According to this configuration, since each sheet is once lifted upward from the sliding surface by the convex portion, each upper and lower sheet is lifted with a different curve due to its rigidity, so that the air layer is interposed between each sheet. , The contact area for each sheet is reduced, and the integration is further improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of a sheet stacking apparatus according to a first embodiment of the present invention in which a V-shaped stacking guide is installed, FIG. 1A is a side view of the sheet stacking apparatus, FIG. 1C is a plan view of the sheet stacking apparatus, and FIG. 1D is a front view of the stacking unit of the sheet stacking apparatus. In FIG. 1, reference numeral 1 denotes a sheet conveying device;
Is a discharge roller for discharging a sheet from the sheet conveying device to the outside of the sheet conveying device, 3 is a sheet accumulating device, 4 is an accumulating guide according to the present invention, 5 is a sliding surface for sliding the sheet being discharged. And also serves as the top plate of the printer housing. The sheet stacking device 3 includes a stacking guide 4 and a sliding surface 5 in the first embodiment. Reference numeral 9 denotes a sheet being discharged. The stacking guides 4 are provided on both side portions of the conveyed sheet,
Each of them has a triangular shape, and as shown in FIG. 1D, the installation angle α with respect to the seat sliding surface 5 (however, 30 degrees ≦ α
≦ 60 degrees). In addition, when the sheet 9 is discharged from the discharge roller 3, the stacking guide 4 is installed at a position separated by about 30 mm from both ends of the sheet 9, and the bottom side of the stacking guide becomes closer to the downstream as the sheet 9 is discharged. The transport direction angle β (10 degrees ≦ β ≦ 30 degrees) so as to approach the center (see FIG. 1c)
Is provided.

Next, a description will be given of a sheet conveying operation using a V-shaped accumulation guide. The sheet 9 is sandwiched between the upper and lower two discharge rollers 3 and is conveyed from the sheet conveying apparatus 1 to the outside of the apparatus. At the time when the sheet 9 is discharged from the discharge roller 3, even if the discharge position from the discharge roller 3 is shifted from the center, all the sheets are damaged by the collecting guide 4 which is set at about 30 mm from both ends of the sheet 9. The guide is smoothly taken into the stacking guide 4 without any trouble. Next, as the sheet 9 is transported downstream, the stacking guides 4 spread outward at the installation angle α and narrow at the transport direction angle β, as shown in FIG.
Both ends of the seat 9 ride on the inclined surface having the angle α,
In addition, the stacking guide 4 approaches the central portion on the back side of the sheet 9 at an angle β, and finally all the sheets 9 are orderly and vertically stacked around the central portion. As described above, according to the first embodiment, the sheets 9 can be orderly stacked on a predetermined stacking device.
Further, the stacking guide 4 itself is of a size that can be originally accommodated in the stacking device, thereby contributing to miniaturization. In addition, since the stacking guide can be obtained at low cost, the cost can be reduced. In addition, since the stacking guide 4 is slidable in the width direction of the sheet, the position thereof can be freely and easily adjusted according to the sheet size.

Table 1 shows the results of experiments in which the installation angle α and the conveyance direction angle β were changed. in this case,
The installation position of the stacking guide on the sheet conveyance exit side was a position 30 mm outside each of the left and right sides of the sheet. In addition, the installation angle α was selected from 0, 15, 30, 45, and 60 degrees, and the experiments were performed with the transport direction angles β of 10, 20, and 30 degrees, respectively. In Table 1, the setting angle α = 0 degrees indicates a case where there is no accumulation guide. As a result of the experiment, “×” is used for a defect, “Δ” is used for a satisfactory result, and “Δ” is used for a good result.

[0009]

[Table 1]

As a result, the installation angle α of the stacking guide 4 is preferably 30 to 60 degrees, and most preferably 45 degrees. In addition, the transport direction angle β is preferably 10 to 30 degrees, and particularly preferably 20 to 30 degrees.

Next, FIG. 2 is a schematic configuration diagram of a sheet accumulating apparatus according to a second embodiment of the present invention in which a V-shaped guide and a convex portion at a center portion are provided. 2A is a side view of the sheet stacking apparatus, FIG. 2B is a front view thereof, FIG. 2C is a plan view thereof, and FIG.
FIG. 4 is a front view of the stacking unit. In the figure, 1 is a sheet conveying device, 2 is a discharge roller for discharging a sheet from the sheet conveying device, 3 is a sheet collecting device, 4 is a collecting guide according to the present invention, and 5 is a sliding surface for sliding a sheet being discharged. The top plate of the housing of the printer including the sheet conveying device 1 is also used. Reference numeral 9 denotes a sheet being discharged.
Reference numeral 6 denotes a projection provided in the second embodiment. In the second embodiment, the sheet stacking device 3 includes a stacking guide 4, a sliding surface 5, and a convex portion 6. The stacking guides 4 are provided on both side portions of the sheet to be conveyed, each having a triangular shape, and as shown in FIG. 2D, an installation angle α with respect to the sheet sliding surface 5 (however, 30 degrees ≦ α ≦ (60 degrees) outward from each other. Moreover,
When the sheet 9 is discharged from the discharge roller 3, the stacking guide 4 is set at a position separated by about 30 mm from both ends of the sheet 9, and the bottom side of the stacking guide moves toward the center of the sheet 9 toward the downstream direction. It is provided at an angle β (10 degrees ≦ β ≦ 30 degrees) (see FIG. 2C) so as to approach. In the second embodiment, the protrusion 6
Is provided near the center of the seat 9 on the sliding surface 5.

Next, a sheet conveying operation using the second embodiment will be described. The sheet 9 is sandwiched between the upper and lower two discharge rollers 3 and is conveyed from the sheet conveying apparatus 1 to the outside of the apparatus. At the time when the sheet 9 is discharged from the discharge roller 3, even if the discharge position from the discharge roller 3 is shifted from the center, all the sheets are damaged by the collecting guide 4 which is set at about 30 mm from both ends of the sheet 9. The guide is smoothly taken into the stacking guide 4 without any trouble. Next, as the sheet 9 is transported downstream, the stacking guides 4 spread outward at the installation angle α and narrow at the transport direction angle β, as shown in FIG.
Both ends of the seat 9 ride on the inclined surface having the angle α,
In addition, the stacking guide 4 approaches the central portion on the back side of the sheet 9 at an angle β, and finally all the sheets 9 vertically overlap with respect to the central portion. Moreover, even in the case where the size of the sheet 9 is too large to accumulate in the first embodiment, in the second embodiment, each sheet 9 is once raised from the sliding surface 5 by the protrusion 6 as shown in FIG. The upper and lower sheets 9 are lifted in different curves due to their rigidity, so that an air layer is interposed between the sheets, the contact area of each sheet is reduced, and the stacking is further improved. It will become.

[0013]

As described above, according to the stacking device of the present invention, the stacking guide on which both side portions of the conveyed sheet slide on the surface is formed along the both side portions of the sheet. The stacking guide is installed with an installation angle (α) that spreads upward, and the stacking guide is installed with a conveyance direction angle (β) approaching the center of the sheet as it goes downstream. Even in the case of a sheet-like conveyed material having such a shape, thickness, and material, sheets can be stacked neatly in a predetermined stacking device. In addition, since the convex portion is provided near the sheet center on the sliding surface of the stacking guide, the sheets can be stacked neatly on a predetermined stacking device even for a particularly large sheet-like conveyed material.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a sheet stacking apparatus according to a first embodiment of the present invention on which a V-shaped stacking guide is installed.

FIG. 2 is a schematic configuration diagram of a sheet stacking apparatus according to a second embodiment of the present invention in which a V-shaped guide and a convex portion of a center portion are provided.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet conveying device 2 discharge roller 3 sheet stacking device 4 stacking guide 5 sliding surface 6 convex portion 9 sheet

Claims (5)

[Claims] 1. A sheet accumulating device for accumulating sheets conveyed from a sheet conveying device on a sliding surface, comprising: an accumulating guide for guiding both side portions of the conveyed sheet along both side portions of the sheet; A sheet stacking device provided on a sliding surface at an installation angle (α) that is outwardly facing each other. 2. The sheet stacking apparatus according to claim 1, wherein said stacking guide is slidable in a width direction according to a sheet size. 3. The sheet according to claim 1, wherein a bottom side of the stacking guide is provided at a conveying direction angle (β) approaching a center of the sheet as the stacking guide moves downstream. Integrated device. 4. When the installation angle α is 3
The sheet stacking device according to claim 3, wherein the sheet stacking device is installed at 0 to 60 degrees and the transport direction angle [beta] is 10 to 60 degrees. 5. The sheet stacking apparatus according to claim 1, wherein a convex portion is provided near a center of the sheet on the sliding surface.