JP4726745B2 - Conveyor / discharge device - Google Patents

Description

The present invention relates to a transport / discharge device, and more particularly to cleaning of a driven roller used in a transport / discharge device disposed in an image forming apparatus such as a stencil printing apparatus, an offset printing apparatus, an ink jet printer or the like and a front and rear processing apparatus thereof.

In a conventional transport / discharge device, the cleaning roller is configured to contact and press the outer peripheral surface of the driven roller and to rotate with a speed difference to remove ink adhering to the driven roller (for example, a patent) Reference 1). For this reason, the ink adhered and accumulated on the driven roller is further transferred to the recording medium, and the recording medium becomes dirty.

For this reason, as a conventional countermeasure against dirt, for example, a cleaning roller having irregular protrusions formed on the outer peripheral surface or a cleaning roller having a knurled outer peripheral surface is used, thereby causing corrosion on the recording medium. The area has been reduced to make it difficult to adhere ink.
JP 2004-338234 A

However, the conventional transport / discharge device is configured to remove the ink adhering to the driven roller by bringing the cleaning roller into contact with the outer peripheral surface of the driven roller and pressing (pressure contact) and rotationally driving with a speed difference. As a result, the ink accumulates in the concave portion of the cleaning roller over time, and there is a problem that the capacity is not sufficient.

Therefore, as a result of various experiments and examinations, the inventors of the present application are more effective to press the cleaning roller against the driven roller without rotating it than to rotate the cleaning roller against the driven roller. I found out.

The first object of the present invention is to suppress the contamination of the recording medium due to the adhesion and accumulation of ink on the driven roller by arranging the cleaning member so as to be in pressure contact with the outer peripheral surface of the driven roller. It is an object of the present invention to provide a transport / discharge device.

A second object of the present invention is to provide a transport / discharge device which uses a cleaning member as a sheet-like felt material to further improve the wiping performance of ink adhered to a driven roller.

It is a third object of the present invention to provide a transport / discharge device which uses a cleaning member as a sheet-like brush material to improve the scraping performance of ink accumulated on a driven roller.

A fourth object of the present invention is to provide a transport / discharge device in which the cleaning member is composed of a polygonal column cleaning attachment and a cleaning sheet to reduce the replacement cycle of the cleaning member.

According to a fifth object of the present invention, the cleaning member comprises a polygonal column cleaning attachment and a cleaning sheet to reduce the replacement cycle of the cleaning member, and the cleaning sheet is used as a felt material to wipe off ink adhered to the driven roller. An object of the present invention is to provide a transport / discharge device that further improves performance.

A sixth object of the present invention is to reduce the cleaning member replacement cycle by configuring the cleaning member as a polygonal column cleaning attachment and a cleaning sheet, and to scrape the ink accumulated on the driven roller using the cleaning sheet as a brush material. An object of the present invention is to provide a transport / discharge device that further improves the picking performance.

Means for Solving the Problems and Effects of the Invention

In the transport / discharge device, the transport / discharge device including the discharge roller and the driven roller for transporting or discharging the recording medium on which the image is formed is arranged so as to be in pressure contact with the outer peripheral surface of the driven roller. A device provided with a cleaning member for removing ink transferred to the driven roller is known. According to this transport / discharge device, in the transport / discharge device for transporting / discharging the recording medium on which the image is formed, the ink is transferred to the outer peripheral surface of the driven roller, and the ink transferred to the driven roller is removed. Since the cleaning member is provided, the recording medium is less contaminated due to the adhesion and accumulation of ink on the driven roller than in the case of the conventional conveyance / discharge device in which the cleaning roller is pressed against the driven roller and rotated. Can be suppressed.

In the transport / discharge device according to the present invention, in the transport / discharge device described above , the cleaning member includes a cleaning attachment formed of a polygonal column and a plurality of attachments attached to each outer surface of the cleaning attachment. It is characterized by comprising a cleaning sheet. According to this transport / discharge device, the cleaning member is composed of a cleaning attachment formed of a polygonal column and a plurality of cleaning sheets attached to each outer surface of the cleaning attachment. By changing the mounting angle, the cleaning sheet pressed against the driven roller can be switched to a cleaning sheet adhered to a different outer surface, and the cleaning member replacement cycle can be reduced.

In the transport / discharge device, the cleaning sheet may be a felt material . According to this transport / discharge device, the cleaning unit is configured such that the cleaning sheet is adhered to each outer surface of the cleaning attachment formed of a polygonal column, thereby reducing the replacement cycle of the cleaning attachment or the entire cleaning unit. In addition, since the sheet-like felt material is used as the cleaning sheet, the wiping performance of the ink adhered to the driven roller is further improved, and the cleaning effect can be improved with a general-purpose and inexpensive configuration. it can.

In the transport / discharge device, the cleaning sheet is a brush material. According to this transport / discharge device, the cleaning unit is configured such that the cleaning sheet is adhered to each outer surface of the cleaning attachment formed of a polygonal column, thereby reducing the replacement cycle of the cleaning attachment or the entire cleaning unit. In addition, since a sheet-like brush material is used as the cleaning sheet, the wiping performance of ink adhering to the driven roller (especially the ink accumulated in the recessed portion of the driven roller) is further improved, and the general purpose In addition, the cleaning effect can be improved with an inexpensive configuration.

For the purpose of providing a transport / discharge device that suppresses contamination of the recording medium due to ink adhesion and accumulation on the driven roller, the ink transferred to the driven roller is disposed so as to be in pressure contact with the outer peripheral surface of the driven roller. This was realized by providing a cleaning member to be removed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram illustrating an image forming system in which a transport / discharge device 200 according to a first embodiment of the present invention is attached to an image forming apparatus 100 illustrated by a broken line.

The image forming apparatus 100 records images such as characters and graphics on the recording medium 11 (see FIG. 3), and sends the recording medium 11 on which the image has been recorded to the transport / discharge device 200. The image forming apparatus 100 records an image on the recording medium 11 by an ink jet method while conveying the recording medium 11 such as plain paper or an OHP (Over Head Projector) film at a high speed. It is placed on top and can be moved as needed. Reference numerals 1 and 2 denote a paper discharge roller and a driven roller of the image forming apparatus 100.

The transport / discharge device 200 transports and discharges the image-recorded recording medium 11 sent from the image forming apparatus 100, and includes a drive roller 211, a driven roller 212, and a drive roller 211 and a driven roller 212. A sheet conveying means 210 formed of a conveying belt 213 that is rotatably stretched between the sheet discharging means 4, a sheet discharging means 220 that is pressed so that the discharge roller 4 and the driven roller 5 face each other, and a sheet discharging A discharge sheet receiver 230 for receiving the recording medium 11 discharged by the means 220 and a cleaning unit 20 disposed so as to contact the driven roller 5 are configured. Reference numeral 214 denotes a suction fan attached to the paper transport unit 210.

FIGS. 2 and 3 are a front view and a side view of main parts showing the arrangement of the cleaning unit 20 in the transport / discharge apparatus 200 according to the first embodiment of the present invention.

The cleaning unit 20 is attached to a bearing 9 that supports the rotating shaft 3 of the paper discharge roller 4 so as to form a pair of left and right, and a spring case 21 that is attached to the bearing 9 and a spring case 21 that is housed in the spring case 21. An extensible coil spring 22, a spring stopper 23 that is engaged with a free end of the coil spring 22 and is movably disposed in the spring case 21, a bracket 24 fixed to the spring stopper 23, and a bracket 24 And a cleaning sheet 25 attached to the surface.

The coil spring 22 serves to apply a contact pressure necessary for the cleaning effect to the driven roller 5 and an appropriate contact pressure that does not hinder rotation.

The cleaning unit 20 is detachably attached to the bearing 9 so that it can be periodically replaced together with the bracket 24 to which the cleaning sheet 25 is attached. For example, the cleaning unit 20 can be easily replaced such as a snap fitting. It can be configured.

Next, the operation of the transport / discharge apparatus 200 according to the first embodiment configured as described above will be described.

The recording medium 11 delivered from the image forming apparatus 100 is transported by the paper transport unit 210 of the transport / discharge device 200, and is discharged between the paper discharge roller 4 and the driven roller 5 of the paper discharge unit 220. The paper is discharged.

When the recording roller 11 rotates about the rotation shaft 3 to discharge the recording medium 11 to the discharge sheet receiver 230, and the driven roller 5 pressed against the recording medium 11 via the recording medium 11 is driven, the outer periphery of the driven roller 5 Since the cleaning unit 20 is disposed so that the cleaning sheet 25 comes into contact with the surface at a predetermined pressure by the expansion elasticity of the coil spring 22, the ink adhered and accumulated on the driven roller 5 is removed by the cleaning sheet 25.

According to the first embodiment, in the transport / discharge device 200 that transports / discharges the recording medium 11 on which an image is formed, the recording medium 11 is disposed so as to be in pressure contact with the outer peripheral surface of the driven roller 5, and is attached and accumulated on the driven roller 5. Since the cleaning sheet 25 for removing ink is provided, it is possible to suppress the contamination of the recording medium 11 due to the adhesion and accumulation of ink on the driven roller 5.

FIG. 4 is a side view of the main part showing the configuration of the paper discharge means 220 and the cleaning unit 20 in the transport / discharge apparatus 200 according to the second embodiment of the present invention. The transport / discharge device 200 according to the second embodiment is configured such that a sheet-like felt material 25 </ b> A is adhered to the blanket 24 as the cleaning sheet 25.

Other parts that are not particularly mentioned are configured in the same manner as the transport / discharge apparatus 200 according to the first embodiment shown in FIGS. 2 and 3, and therefore the corresponding parts are denoted by the same reference numerals. I will omit the detailed explanation of them.

According to the transport / discharge device 200 according to the second embodiment configured as described above, since the sheet-like felt material 25A is used as the cleaning sheet 25, the wiping performance of the ink adhered to the driven roller 5 is improved. Further, the cleaning effect can be improved with a general-purpose and inexpensive configuration.

FIG. 5 is a side view of the main part showing the configuration of the paper discharge means 220 and the cleaning unit 20 in the transport / discharge apparatus 200 according to Embodiment 3 of the present invention. The cleaning unit 20 in the transport / discharge device 200 according to the third embodiment is obtained by sticking a sheet-like brush material 25 </ b> B as a cleaning sheet 25 to the blanket 23.

Other parts that are not particularly mentioned are configured in the same manner as the transport / discharge apparatus 200 according to the first embodiment shown in FIGS. 2 and 3, and therefore the corresponding parts are denoted by the same reference numerals. I will omit the detailed explanation of them.

Next, according to the transport / discharge device 200 according to the third embodiment configured as described above, since the sheet-like brush material 25B is used as the cleaning sheet 25, the ink (which is fixed to the driven roller 5) In particular, the scraping performance of the ink accumulated in the recessed portion of the driven roller 5 is further improved, and the cleaning effect can be improved with a general-purpose and inexpensive configuration.

FIGS. 6 and 7 are a front view and a side view of main parts showing the arrangement of the cleaning unit 30 in the transport / discharge apparatus 200 according to the fourth embodiment of the present invention.

The cleaning unit 30 is attached to a bearing 9 that supports the rotating shaft 3 of the paper discharge roller 4 so as to form a pair of left and right, and a spring case 31 attached to the bearing 9 and housed in the spring case 31. An extensible coil spring 32, a spring stopper 33 that is engaged with the free end of the coil spring 32 and is movably disposed in the spring case 31, and a “U” -shaped member fixed to the spring stopper 33. A bracket 34, a cleaning attachment 35 that is detachably attached to the bracket 34, a retaining ring 36 that prevents the cleaning attachment 35 from coming off from the bracket 34, and six cleaning sheets that are attached to six outer surfaces of the cleaning attachment 35 37.

The cleaning attachment 35 is a hexagonal cylindrical body having a hexagonal cross section, a spline hole 35a that fits into the spline shaft 34a of the bracket 34 is formed in the center thereof, and six cleaning surfaces are provided on the six outer surfaces. A sheet 37 is pasted. The cleaning attachment 35 is fitted by inserting a spline hole 35 a into the spline shaft 34 a of the bracket 34, and one side is prevented from being detached by a retaining ring 36. Further, the cleaning attachment 35 is removed from the bracket 34 by removing the retaining ring 36 and pulling it out from the spline shaft 34 a of the bracket 34. That is, the cleaning attachment 35 is detachably attached to the bracket 34.

Other parts that are not particularly mentioned are configured in the same manner as the transport / discharge apparatus 200 according to the first embodiment shown in FIGS. 2 and 3, and therefore the corresponding parts are denoted by the same reference numerals. I will omit the detailed explanation of them.

Next, the operation of the transport / discharge apparatus 200 according to the fourth embodiment configured as described above will be described.

When the recording roller 11 rotates about the rotation shaft 3 to discharge the recording medium 11 to the discharge sheet receiver 230, and the driven roller 5 pressed against the recording medium 11 via the recording medium 11 is driven, the outer periphery of the driven roller 5 Since the cleaning unit 30 is disposed so that the cleaning sheet 37 comes into contact with the surface at a predetermined pressure by the expansion elasticity of the coil spring 32, the ink adhered and accumulated on the driven roller 5 is removed by the cleaning sheet 37.

Here, when the cleaning sheet 37 that has been in contact with the driven roller 5 is soiled, the retaining ring 36 is removed, the cleaning attachment 35 is once pulled out of the spline shaft 34a of the bracket 34, and the cleaning attachment 35 is about 30 ° (= 360 °). ÷ 6) If the spline hole 35a is inserted into the spline shaft 34a of the bracket 34 again and the cleaning attachment 35 is re-fixed with the retaining ring 16, the unused high-quality cleaning sheet adjacent to the dirty cleaning sheet 37 can be obtained. 37 is in pressure contact with the driven roller 5, and the cleaning of the driven roller 5 by the cleaning sheet 37 can be continued without replacing the cleaning attachment 35 or the entire cleaning unit 30.

Further, when all of the six cleaning sheets 37 attached to the respective outer surfaces of the cleaning attachment 35 formed of hexagonal cylinders are used, the cleaning attachment 35 or the entire cleaning unit 30 may be replaced.

According to the fourth embodiment, the cleaning unit 30 includes the cleaning attachment 35 formed of a hexagonal column and the plurality of cleaning sheets 37 attached to the outer surfaces of the cleaning attachment 35. By changing the attachment angle of the attachment 35, the cleaning sheet 37 pressed against the driven roller 5 can be switched to the cleaning sheet 37 adhered to a different outer surface, and the replacement cycle of the cleaning attachment 35 or the entire cleaning unit 30 can be changed. Can be reduced.

In the fourth embodiment, the cleaning attachment 35 is a hexagonal prism. However, it goes without saying that the present invention can be similarly applied to a polygonal prism that is equal to or greater than a triangular prism (the same applies to the following embodiments). ).

In addition, the cleaning sheet 37 is attached to each outer surface of the cleaning attachment 35. However, the fixing method of the cleaning sheet 37 to the cleaning attachment 35 is not limited to the attachment, such as fitting, click stop, and integral molding. It goes without saying that other methods may be used (the same applies to the following examples).

FIG. 8 is a main part side view showing the configuration of the paper discharge means 220 and the cleaning unit 30 in the transport / discharge apparatus 200 according to the fifth embodiment of the present invention. In the cleaning unit 30 of the fifth embodiment, the cleaning sheet 37 attached to each outer surface of the cleaning attachment 35 formed of a hexagonal column is a sheet-like felt material 37A.

Other parts that are not particularly mentioned are configured in the same manner as the transport / discharge apparatus 200 according to the fourth embodiment shown in FIGS. 6 and 7, and therefore the corresponding parts are denoted by the same reference numerals. I will omit the detailed explanation of them.

In the transport / discharge device 200 according to the fifth embodiment configured as described above, the cleaning unit 30 is configured such that the cleaning sheet 37 is attached to each outer surface of the cleaning attachment 35 formed of a polygonal column. Further, the replacement cycle of the entire cleaning attachment 35 or the cleaning unit 30 can be reduced, and the sheet-like felt material 37A is used as the cleaning sheet 37, so that the wiping performance of the ink attached to the driven roller 5 is further improved. The cleaning effect can be improved with a general-purpose and inexpensive configuration.

FIG. 9 is a side view of the main part showing the configuration of the paper discharge means 220 and the cleaning unit 30 in the transport / discharge apparatus 200 according to Embodiment 6 of the present invention. In the cleaning unit 30 of the sixth embodiment, the cleaning sheet 37 attached to each outer surface of the cleaning attachment 35 formed of a hexagonal column is a sheet-like brush material 37B.

Other parts that are not particularly mentioned are configured in the same manner as the transport / discharge apparatus 200 according to the fourth embodiment shown in FIGS. 6 and 7, and therefore the corresponding parts are denoted by the same reference numerals. I will omit the detailed explanation of them.

In the transport / discharge device 200 according to the sixth embodiment configured as described above, the cleaning unit 30 is configured such that the cleaning sheet 37 is attached to each outer surface of the cleaning attachment 35 formed of a polygonal column. Further, the replacement cycle of the entire cleaning attachment 35 or the cleaning unit 30 can be reduced, and the sheet-like brush material 37B is used as the cleaning sheet 37, so that the ink adhered to the driven roller 5 (particularly the driven roller 5). The ink scraping performance of the ink accumulated in the concave portion is further improved, and the cleaning effect can be improved with a general-purpose and inexpensive configuration.

In each of the above-described embodiments, the apparatus (previous apparatus) to which the transport / discharge apparatus 200 is attached is described as the image forming apparatus 100. However, the previous apparatus is not limited to the image forming apparatus 100, and the paper discharge apparatus. Needless to say, it may be another device that passes the paper, such as a paper processing device or a paper post-processing device.

Although the embodiments of the present invention have been described above, these are merely examples, and the present invention is not limited to these embodiments, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible.

1 is a side view of a main part showing a state in which a transport / discharge device according to Embodiment 1 of the invention is attached to an image forming apparatus. FIG. 3 is a front view of a main part showing an arrangement state of the cleaning unit in the first embodiment. FIG. 3 is a side view of a main part showing the arrangement state of the cleaning unit in the first embodiment. FIG. 10 is a side view of a main part showing a state of arrangement of a cleaning unit in Embodiment 2. FIG. 10 is a side view of a main part showing an arrangement state of a cleaning unit in Embodiment 3. FIG. 10 is a front view of a main part showing an arrangement state of a cleaning unit in Embodiment 4. FIG. 10 is a side view of a main part showing an arrangement state of a cleaning unit in Embodiment 4. FIG. 10 is a side view of a main part showing an arrangement state of a cleaning unit in Embodiment 5. FIG. 10 is a side view of a main part showing an arrangement state of a cleaning unit in Embodiment 6.

Explanation of symbols

3 Rotating shaft 4 Paper discharge roller 5 Driven roller 9 Bearing 20 Cleaning unit 21 Spring case 22 Coil spring 23 Spring stopper 24 Bracket 25 Cleaning sheet (cleaning member)
30 Cleaning Unit 31 Spring Case 32 Coil Spring 33 Spring Stopper 34 Bracket 35 Cleaning Attachment 36 Retaining Ring 37 Cleaning Sheet 100 Image Forming Apparatus 200 Conveying / Discharging Device 210 Paper Conveying Means 220 Paper Discharging Means 230 Discharged Paper Receipt

Claims (3)

In a transport / discharge device having a discharge roller and a driven roller for transporting or discharging a recording medium on which an image is formed,
A cleaning member is provided so as to be in pressure contact with the outer peripheral surface of the driven roller, and removes ink transferred to the driven roller.
The transport / discharge device, wherein the cleaning member includes a cleaning attachment formed of a polygonal column and a plurality of cleaning sheets attached to each outer side surface of the cleaning attachment. The transport / discharge apparatus according to claim 1, wherein the cleaning sheet is made of a felt material. The transport / discharge apparatus according to claim 1, wherein the cleaning sheet is a brush material.

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