JPH07215523A - Paper sheet conveyor - Google Patents

Abstract

PURPOSE:To prevent the accumulation of paper powder on a lower guide plate and avoid a trouble caused by the paper powder by forming multiple paper powder dropping holes on at least the lower guide plate of a guide plate pair in a paper sheet conveyor forming a conveyance path with a roller pair and a guide plate pair. CONSTITUTION:When the reproduced paper is used for the transfer paper and paper powder is generated on a conveyance path, the paper powder on a lower guide plate 4 portion is dropped onto a paper powder receiving tray through paper powder dropping holes 6. A little quantity of paper powder is accumulated on the lower guide plate 4b. The paper powder dropping holes 6 are formed on the lower guide plate 4b. Even when the tip of the transfer paper is brought into contact with the long holes 6, its advance is not hindered, no jam is induced, and the transfer paper is smoothly conveyed. The dropped paper powder is collected at one place in the paper powder receiving tray, it is not scattered in the machine, and the post-process such as cleaning is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet transporting device applied to a device handling a sheet such as a transfer sheet such as a copying machine, a facsimile, and various printers.

[0002]

2. Description of the Related Art Generally, in a paper sheet handling device such as a copying machine, a conveying path is formed by a plurality of roller pairs and a pair of guide plates to perform a sheet feeding / conveying / discharging sheet conveying process. Is configured to do.

In recent years, recycled paper has tended to be used as a transfer paper in copying machines, for example, due to social demands for resource reuse and other circumstances. However, in the case of recycled paper, paper dust is often generated, so the rubber roller surface that makes up the roller pair becomes dirty and slips easily, and a large amount of paper dust gets into the cleaning section, resulting in poor cleaning and image stains. It is easy to induce image defects such as.

Conventionally, as measures against paper dust, for example, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Laid-Open No. 9-203028, after the transfer sheets are stacked or before being fed, the roller is rotated and brought into contact with a facing separation sheet such as a polyester sheet to clean the roller surface. For example, as shown in JP-A-59-92840,
For example, the paper dust on the roller is removed by bringing the air suction port close to the conductive fiber brush, or a cleaning member such as a brush roller is attached to the roller as shown in Japanese Utility Model Laid-Open No. 57-37942. There is one in which the paper dust is scraped off by contact.

[0005]

However, all of the conventional measures against paper dust are devised how to remove the paper dust on the rollers. For example, a guide between the rollers located on the upstream and downstream sides is used. No measures have been taken against paper dust on the plate, especially on the lower guide plate. In this type of transporting device, paper dust is likely to be deposited on the guide plate, but if paper dust accumulates on the guide plate, it will be electrostatically redeposited on the paper sheet being transported. This may cause inconveniences such as the adhesion of paper powder to the downstream roller and the increase in the cleaning load on the downstream roller. Further, when the paper dust is piled up on the guide plate, there may be a problem that the paper dust rises due to an opening / closing impact at the time of jam processing, for example.

[0006]

According to a first aspect of the present invention, in a paper sheet transporting device in which a paper sheet transporting path is formed by a roller pair and a guide plate pair, a plurality of sheets are provided on at least a lower guide plate of the guide plate pair. A hole for dropping paper dust was formed.

According to a second aspect of the present invention, in the configuration of the first aspect of the invention, the paper dust dropping hole is formed in a shape having no downstream portion in the paper sheet advancing direction and a portion orthogonal to the paper sheet advancing direction. did. According to the invention of claim 3, in addition to the configuration of the invention of claim 1 or 2, a paper dust receiving member is provided below the lower guide plate.

According to a fourth aspect of the invention, in addition to the configuration of the first, second or third aspect of the invention, a vibrating device for selectively vibrating the lower guide plate is provided.

[0009]

According to the first aspect of the present invention, since the lower guide plate has a plurality of paper dust dropping holes, the paper dust accompanying the sheet conveyance will drop downward through the paper dust dropping holes.
Paper dust will not accumulate on the lower guide plate.

At this time, in the invention according to claim 2,
Since the paper dust drop hole is formed in a shape that does not have a portion orthogonal to the paper traveling direction in the downstream portion of the paper traveling direction, the paper sheet being conveyed may come into contact with the lower guide plate surface. Also, smooth transportability can be ensured without causing the inconvenience that the paper powder dropping holes hinder the progress.

According to the third aspect of the invention, since the paper dust receiving member is provided below the lower guide plate, the paper dust falling downward from the paper dust dropping hole is collected by the paper dust receiving member. As a result, it is possible to prevent the paper dust from scattering and facilitate the post-treatment of the paper dust.

Further, in the invention according to claim 4, by selectively vibrating the lower guide plate by the vibrating device, the paper dust can be more effectively dropped, and It is possible to prevent the accumulation of paper dust on the inside.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claims 1 to 3 will be described with reference to FIGS. This embodiment is applied to, for example, a transfer sheet conveying device in a copying machine, and a transfer sheet conveying path (sheet conveying path) 2 for conveying a transfer sheet 1 which is a sheet is
A roller pair 3 including an upper feed roller 3a and a lower feed roller 3b which are in contact with each other and are rotated in the transport direction.
And a guide plate pair 4 composed of an upper guide plate 4a and a lower guide plate 4b that are opposed to each other with a predetermined gap. Here, the roller pairs 3 are provided in an appropriate number, for example, as shown in FIG. 1, such as an upstream roller pair 3A and a downstream roller pair 3B. In addition, each guide plate 4a,
Roller openings 5a and 5b for protruding the roller rollers 3a and 3b, respectively, are formed in a rectangular shape on 4b.

Therefore, the lower guide plate 4b shown in FIG.
As shown in FIG. 5, a plurality of paper dust dropping holes 6 are appropriately formed in a dispersed manner at positions before and after each roller pair 3A, 3B. These paper dust dropping holes 6 are formed, for example, in a long hole shape elongated in the traveling direction of the transfer paper 1. Further, as shown in FIG. 2, a paper dust receiving tray (paper dust receiving member) 7 is provided below the lower guide plate 4b.

According to this structure, when, for example, recycled paper is used as the transfer paper 1, when paper dust is generated on the conveying path, the paper dust is generated in the lower guide plate 4b. It will fall onto the paper dust receiving tray 7 through the dust dropping hole 6. Therefore, the amount of paper powder accumulated on the lower guide plate 4b is small. Further, even if the paper dust dropping hole 6 is formed in the lower guide plate 4b, it has a long hole shape and does not hinder its progress even when the leading end of the transfer paper 1 comes into contact therewith, so that it does not induce a jam or the like. It can be transported smoothly. Further, since the paper dust dropped from the paper dust dropping hole 6 is collected in one place by the paper dust receiving tray 7,
It does not scatter inside the machine, and post-processing such as cleaning becomes easy.

The shape of the paper powder dropping hole 6 formed in the lower guide plate 4b is not limited to the elongated hole shape shown in FIG. 1, but for example, as shown in FIG. 3 (a). A rhombus shape elongated in the traveling direction (indicated by an arrow), a triangular shape having an apex on the downstream side in the traveling direction as shown in FIG. 7B, a circular shape as shown in FIG. . on the other hand,
The rectangular (square or rectangular) hole 6a as shown in FIG. 6D and the triangular hole 6b having a bottom side on the downstream side in the traveling direction as shown in FIG. Each of the paper dust dropping holes 6 illustrated in FIGS. 1 and 3A to 3C has a shape that does not have a side portion orthogonal to the traveling direction at the downstream portion of the traveling direction, and thus the paper dust dropping hole 6 of the paper dust dropping hole 6 is formed. This is because its presence does not hinder the progress of the transfer paper 1.

Next, an embodiment of the invention described in claim 4 will be described with reference to FIG. The same parts as those shown in the above-mentioned embodiment are designated by the same reference numerals. In this embodiment, a vibrating device 8 for selectively vibrating the lower guide plate 4b is added to the lower guide plate 4b having the paper dust dropping holes 6 shown in the above embodiment. It is composed. This vibration device 8
Is an oscillating lever 9 which has an oscillating point 9a which is brought close to just below the lower guide plate 4b and which is rotatably supported by a fulcrum 10.
And is locked at one end of the vibration lever 9 and the vibration point 9
The solenoid 11 is driven to displace in the direction in which a is in contact with the lower guide plate 4b, and is biased in the direction in which the vibration point 9a is locked to the other end of the vibration lever 9 and moves away from the lower guide plate 4b. It is composed of a spring 12 for moving and a stopper 13 for restricting the movement amount thereof.

According to such a configuration, the solenoid 11
Is selectively energized to displace the vibration point 9a of the vibration lever 9 so as to appropriately contact the lower guide plate 4b, whereby the lower guide plate 4b can be vibrated, and the paper dust dropping hole Even if paper dust is present between the sheets 6, it is possible to forcibly drop it from the paper dust dropping hole 6 by such vibration, and the paper dust can be removed more effectively.

In these embodiments, the transfer paper transport path 2
However, it is needless to say that the same can be applied to the case where the conveyance path is set in an inclined state due to layout restrictions or the like. Therefore, the vertical direction in the present invention does not mean the vertical direction in a strict sense.

[0020]

According to the first aspect of the present invention, in a paper sheet transporting device in which a paper sheet transporting path is formed by a roller pair and a guide plate pair, a plurality of paper sheets are provided on at least the lower guide plate of the guide plate pair. Since the powder drop hole is formed, the paper powder that accompanies the transport of the paper sheet can be dropped downward through the paper powder drop hole, and the accumulation of paper powder on the lower guide plate can be prevented. It is possible to avoid the accompanying inconvenience.

According to the second aspect of the present invention, in the configuration of the first aspect of the invention, the paper powder dropping hole does not have a portion at a downstream portion in the paper sheet advancing direction which is orthogonal to the paper sheet advancing direction. Since it is formed in the above, even if the paper sheet being conveyed may come into contact with the lower guide plate surface, it is possible to avoid the inconvenience that the progress is obstructed by the hole for dropping the paper powder, and it is possible to secure a smooth conveyance property. it can.

According to the third aspect of the present invention, in addition to the structure of the first or second aspect of the invention, since the paper dust receiving member is provided below the lower guide plate, the paper dust receiving member is provided below the paper dust dropping hole. The paper dust falling onto the paper powder can be collected at one place by the paper powder receiving member, the paper powder can be prevented from scattering, and the post-treatment of the paper powder becomes easy.

According to the invention of claim 4, claim 1,
In addition to the configuration of the invention described in 2 or 3, a vibrating device that selectively vibrates the lower guide plate is provided, and the lower guide plate is selectively vibrated. The powder can be dropped, and the accumulation of paper powder on the lower guide plate can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the invention described in claims 1 to 3.

FIG. 2 is a vertical sectional front view showing a transfer paper transport device.

FIG. 3 is a plan view illustrating various shapes of holes for dropping paper dust.

FIG. 4 is a side view showing an embodiment of the invention as set forth in claim 4;

[Explanation of symbols]

 1 paper sheet 2 paper sheet conveying path 3 roller pair 4 guide plate pair 4b lower guide plate 6 paper dust dropping hole 7 paper dust receiving member 8 vibrating device

Claims (4)

[Claims] 1. A paper sheet conveying device in which a paper sheet conveying path is formed by a roller pair and a guide plate pair, wherein a plurality of paper dust dropping holes are formed in at least a lower guide plate of the guide plate pair. A paper transport device. 2. The paper sheet conveying apparatus according to claim 1, wherein the paper dust dropping hole is formed in a shape having no portion at a downstream portion in the paper sheet advancing direction orthogonal to the paper sheet advancing direction. 3. The paper sheet conveying device according to claim 1, wherein a paper dust receiving member is provided below the lower guide plate. 4. The sheet conveying apparatus according to claim 1, further comprising a vibrating device that selectively vibrates the lower guide plate.