WO2015064615A1 - 紙送り用ローラ - Google Patents

紙送り用ローラ Download PDF

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Publication number
WO2015064615A1
WO2015064615A1 PCT/JP2014/078717 JP2014078717W WO2015064615A1 WO 2015064615 A1 WO2015064615 A1 WO 2015064615A1 JP 2014078717 W JP2014078717 W JP 2014078717W WO 2015064615 A1 WO2015064615 A1 WO 2015064615A1
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WO
WIPO (PCT)
Prior art keywords
paper
hole
valley
paper feeding
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/078717
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
邦朗 土井
淳洋 河野
祐馬 吉田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Riko Co Ltd
Original Assignee
Sumitomo Riko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Riko Co Ltd filed Critical Sumitomo Riko Co Ltd
Priority to CN201480052037.7A priority Critical patent/CN105934398B/zh
Publication of WO2015064615A1 publication Critical patent/WO2015064615A1/ja
Priority to US15/136,049 priority patent/US9790041B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0638—Construction of the rollers or like rotary separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/52—Surface of the elements in contact with the forwarded or guided material other geometrical properties
    • B65H2404/521—Reliefs
    • B65H2404/5213—Geometric details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/16—Irregularities, e.g. protuberances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/26—Damages to handling machine
    • B65H2601/261—Clogging
    • B65H2601/2611—Soiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2324/00—Apparatus used in printing
    • F16C2324/16—Printing machines

Definitions

  • the present invention relates to a paper feed roller.
  • a paper feed roller is used to transport paper.
  • an image forming apparatus such as a copying machine or a printer is generally provided with a sheet feeding device that separates sheets one by one from a sheet cassette that stores sheets and sends them to an image forming unit.
  • a pad retard method (FR method), a friction retard method (FRR method), and the like have been put to practical use as this paper feeding device.
  • the FRR method is used. Often adopted.
  • the FRR type paper feeding device includes a pickup roller that contacts the top of the paper contained in the paper cassette and draws the paper out of the paper cassette by frictional force, and a feed roller that sends out the drawn paper to the paper conveyance path. And a retard roller that is pressed against the feed roller and is applied with a rotational driving force in a direction opposite to the direction of stopping or conveying the sheet via a torque limiter.
  • the paper feeding roller is subjected to texture processing on the roller surface, and the surface roughness due to the textured surface consisting of a mountain-shaped portion and a valley-shaped portion. Is often given (see, for example, Patent Document 1).
  • the conventional technology has room for improvement in the following points.
  • paper with a lot of paper dust such as paper made in foreign countries has been widely used, and the demand for paper dust adhesion of a paper feed roller has increased.
  • the conventional paper feed roller lacks the volume of the valley portion for allowing the paper powder to escape when the ridge portion on the embossed surface is worn due to long-term use. Therefore, there is a problem that paper dust adheres to the top of the mountain-shaped portion, the friction coefficient of the roller surface decreases, and a paper feeding problem occurs. In order to avoid this problem, it is conceivable to simply increase the roughness of the embossed surface on the roller surface. However, according to this method, the paper powder trapped in the valley portion is easily spilled or the surface of the wrinkle is easily lost.
  • the present invention has been made in view of the above-described background, and has been obtained in an attempt to provide a paper feed roller that is less likely to cause paper feed problems over a long period of time.
  • One aspect of the present invention is a paper feeding roller having a textured surface including a mountain-shaped portion and a valley-shaped portion, and has a hole portion recessed inward at least on the bottom surface of the valley-shaped portion.
  • the paper feeding roller is characterized by the above.
  • the paper feeding roller has a textured surface having a mountain-shaped portion and a valley-shaped portion, and has a hole portion recessed inward at least on the bottom surface of the valley-shaped portion. Therefore, even when the ridges on the surface of the embossed surface wear due to long-term use, the presence of the holes formed in the bottom surface of the valleys can ensure a volume for escaping paper dust. Therefore, the paper feeding roller is unlikely to cause a paper feeding problem over a long period of time.
  • the paper feeding roller can improve the adhesion of paper dust to paper with a lot of paper dust such as paper made in foreign countries, so it is effective for making the paper feeding device highly durable and maintenance-free. .
  • FIG. 3 is an explanatory diagram schematically illustrating a paper feeding roller of Example 1 with a part thereof broken.
  • FIG. 2 is a cross-sectional view of the paper feeding roller of Example 1 taken along II-II. It is explanatory drawing which expanded and showed the A part of the roller surface in FIG. 5 is a microscope image of a paper feed roller of Sample 4.
  • FIG. 3 is an explanatory diagram schematically illustrating a paper feeding roller of Example 1 with a part thereof broken.
  • FIG. 2 is a cross-sectional view of the paper feeding roller of Example 1 taken along II-II. It is explanatory drawing which expanded and showed the A part of the roller surface in FIG. 5 is a microscope image of a paper feed roller of Sample 4.
  • FIG. 3 is an explanatory diagram schematically illustrating a paper feeding roller of Example 1 with a part thereof broken.
  • FIG. 2 is a cross-sectional view of the paper feeding roller of Example 1 taken along II-II. It is explanatory drawing which expanded and showed the A
  • the paper feeding roller has a textured surface having a mountain-shaped portion and a valley-shaped portion. Specifically, the embossed surface has a large number of mountain-shaped portions and valley-shaped portions. At the time of paper feeding by the paper feeding roller, the top of the mountain-shaped portion comes into contact with the paper.
  • the valley-shaped part is a part having a lower height than the mountain-shaped part sandwiched between the relatively high mountain-shaped parts.
  • the hole may be at least on the bottom surface of the valley portion.
  • the hole portion may be provided not only on the bottom surface of the valley-shaped portion but also on the side surface of the valley-shaped portion.
  • the arithmetic average height Ra of the embossed surface can be in the range of 3 to 50 ⁇ m.
  • the arithmetic average height Ra of the wrinkle surface is preferably 5 ⁇ m or more, more preferably 7 ⁇ m or more, and even more preferably 10 ⁇ m or more, from the viewpoint of increasing the paper powder capturing effect by the valley-shaped part and the hole part. it can.
  • the arithmetic average height Ra of the grain surface is preferably 45 ⁇ m or less, more preferably 43 ⁇ m or less, and even more preferably 40 ⁇ m, from the viewpoint of the balance between securing the volume of the valley-like portion and the chipping effect of the grain surface over a long period of time. It can be as follows.
  • the arithmetic average height Ra is a value measured in the circumferential direction of the roller using a surface roughness shape measuring instrument in accordance with JIS B0601 2001.
  • the diameter of the hole can be in the range of 1 to 100 ⁇ m.
  • the effect of forming the hole in the valley portion can be ensured. Moreover, it becomes easy to suppress the chip
  • the diameter of the hole is preferably 1.5 ⁇ m or more, more preferably 3 ⁇ m or more, and even more preferably 5 ⁇ m or more from the viewpoint of easily ensuring the effect of forming the hole in the valley. . Further, the diameter of the hole is preferably 80 ⁇ m or less, more preferably 60 ⁇ m or less, and even more preferably 40 ⁇ m or less, from the viewpoint of increasing the effect of suppressing chipping on the textured surface during long-term use. The diameter of the hole is measured by taking the surface of the wrinkle vertically from above with a laser microscope, extracting 10 holes at random, measuring the maximum diameter of each hole, and determining the average value. can do.
  • the ratio of the area occupied by the hole portion to the area of the valley portion can be in the range of 1 to 25%.
  • the effect of forming the hole in the valley portion can be ensured.
  • the ratio of the area occupied by the hole to the area of the valley is preferably 1.5% or more, more preferably 3% or more, from the viewpoint of easily ensuring the effect of forming the hole in the valley. More preferably, it can be 5% or more.
  • the ratio of the area occupied by the holes to the area of the valley-shaped portion is preferably 24% or less, more preferably 23% or less, and still more preferably, from the viewpoint of increasing the effect of suppressing chipping on the textured surface during long-term use. It can be made 22% or less.
  • the ratio of the area occupied by the hole portion to the area of the valley-shaped portion is obtained by photographing the embossed surface vertically with a laser microscope (photographing range: 700 ⁇ m ⁇ 500 ⁇ m), and performing height analysis (binarization), While calculating the bottom area of a valley-shaped part, it can obtain
  • the hole can have a hemispherical shape.
  • the hole can be a trace of bubbles.
  • the paper feeding roller can be used by being incorporated in a paper feeding device in an electrophotographic image forming apparatus.
  • the electrophotographic image forming apparatus include a copying machine, a printer, a facsimile, a multifunction peripheral, and a POD (Print On Demand) apparatus that employs an electrophotographic system using a charged image.
  • the paper feed roller can be applied to various rollers such as a pickup roller, a feed roller, and a retard roller.
  • the paper feed roller can be configured to have an elastic body, and the surface of the elastic body can have the textured surface.
  • main materials constituting the elastic body include polyurethane, EPDM, and silicone rubber.
  • the main material constituting the elastic body is preferably polyurethane from the viewpoint of wear resistance, ease of maintaining the friction coefficient, and the like.
  • thermosetting polyurethane for example, various thermosetting polyurethanes such as ether, ester and caprolactone can be used.
  • ether-based thermosetting polyurethane can be suitably used from the viewpoint that it is difficult to hydrolyze under the use environment of the paper feed roller and can contribute to improvement in durability.
  • the thermosetting polyurethane can be a thermosetting polyurethane rubber (including an elastomer).
  • additives such as a plasticizer, a chain extender, a crosslinking agent, a catalyst, a conductive agent, and a colorant may be added to the elastic body.
  • the elastic body can be formed on the outer peripheral surface of a shaft body made of a metal having conductivity, a resin shaft body having electrical insulation, or the like.
  • the paper feeding roller can be manufactured as follows, for example. Electric discharge machining is performed on the surface of the through hole in the molding die having the through hole to form surface irregularities corresponding to the mountain-shaped portion and the valley-shaped portion. Next, fine air bubbles are included in the roller forming material by air stirring or the like, and the roller forming material containing the air bubbles is filled in the through holes of the molding die. At this time, the axial direction is the vertical direction. Thereafter, the molding die is heated, a paper feed roller is formed from the roller forming material, and demolding is performed. In addition, it can cut
  • the surface unevenness of the molding die is transferred, thereby forming a textured surface including a mountain-shaped portion and a valley-shaped portion, and positively utilizing bubbles contained in the roller forming material, As a trace of the lower part of the bubble, a large number of inwardly recessed holes can be formed in the valley.
  • the amount of bubbles contained in the roller forming material can be adjusted by changing the air stirring speed and the stirring time.
  • the temperature of the roller forming material filled in the mold can be adjusted to be low so that bubbles in the roller forming material do not easily escape, and the viscosity of the roller forming material can be increased.
  • the temperature can be about 100 ° C. or less.
  • Example 1 The paper feeding roller of Example 1 will be described with reference to FIGS. As shown in FIGS. 1 to 3, the paper feeding roller 1 of this example has a textured surface 21 including a mountain-shaped portion 211 and a valley-shaped portion 212, and at least on the bottom surface of the valley-shaped portion 212, It has a hole 213 recessed inward.
  • the paper feeding roller 1 has an elastic body 2 having a cylindrical shape, and has the above-mentioned textured surface 21 on the surface of the elastic body 2 serving as a roller surface.
  • the elastic body 2 is made of thermosetting polyurethane.
  • the paper feed roller 1 has a resin shaft 3.
  • the shaft body 3 is formed in a cylindrical shape from an acetal resin.
  • the elastic body 2 is formed on the outer peripheral surface of the shaft body 3.
  • a metal shaft body (not shown) provided in a paper feeding device (not shown) in the electrophotographic image forming apparatus is inserted into the shaft body 3 so as to transmit a rotational driving force.
  • the hole 213 exists not only on the bottom surface of the valley-shaped portion 212 but also on the side surface of the valley-shaped portion 212 (which also corresponds to the side surface of the mountain-shaped portion 211). However, the hole 213 is not substantially present at the top of the mountain-shaped portion 211. Specifically, the hole 213 is a trace of bubbles contained in the elastic body forming material, which is a roller forming material, and has a hemispherical shape.
  • the arithmetic average height Ra of the embossed surface 21 is in the range of 3 to 50 ⁇ m.
  • the diameter of the hole 213 is in the range of 1 to 100 ⁇ m.
  • the ratio of the area occupied by the hole 213 to the area of the valley 212 is in the range of 1 to 25%.
  • the urethane prepolymer was vacuum degassed at 90 ° C. for 30 minutes, and then air stirred under the air stirring conditions shown in Table 1 described later. Thereafter, with respect to 100 parts by mass of the urethane prepolymer, 30 parts by mass of a plasticizer (dioctyl phthalate), 3 parts by mass of a chain extender (1,4-butanediol (1,4-BD)), 2 parts by mass of methylolpropane (TMP)) were blended and stirred and mixed under reduced pressure for 2 minutes to prepare each elastic body forming material used for forming an elastic body in the paper feed rollers of Samples 1 to 18. . Each of these elastic body forming materials contains fine bubbles in order to form holes.
  • a plasticizer dioctyl phthalate
  • a chain extender 1,4-butanediol
  • TMP methylolpropane
  • an elastic body forming material used for forming an elastic body in the paper feed roller of Sample 19 was prepared in the same manner except that the air agitation was not performed. That is, this elastic body forming material is not prepared so as to actively contain fine bubbles.
  • electric discharge machining was performed on the through hole of the molding die having a circular hole having a circular cross section using an electric discharge machine (“DIAX VX10” manufactured by Mitsubishi Electric Corporation).
  • the electric discharge machining is performed in order to provide a textured surface including a mountain-shaped portion and a valley-shaped portion on the surface of the elastic body to be molded.
  • the arithmetic average height Ra of the embossed surface mentioned later was adjusted by the discharge control at the time of the said electric discharge machining.
  • the cored bar is coaxially set in the through hole of the molding die (the axial direction is the vertical direction), and both end openings are closed with caps, and a predetermined elastic layer forming material is placed in the molding space.
  • the molding die was put in an oven, and the urethane prepolymer was thermally cured (150 ° C. ⁇ 60 minutes).
  • an elastic body made of thermosetting polyurethane was formed on the outer peripheral surface of the cored bar, and thereafter the mold was removed and the elastic body was extracted from the cored bar and cut into a predetermined length.
  • each elastic body having a cylindrical shape with an outer diameter of ⁇ 25 mm, an inner diameter of ⁇ 16 mm, and a length of 24 mm was obtained.
  • a cylindrical shaft body made of acetal resin was press-fitted into the cylinder of each elastic body. As a result, paper feed rollers for Sample 1 to Sample 19 were obtained.
  • FIG. 4 a microscope image of the paper feed roller of Sample 4 is shown in FIG.
  • the paper feed rollers of Samples 1 to 18 have a textured surface including a mountain-shaped portion and a valley-shaped portion on the surface of the elastic body, which is the roller surface, and at least the valley-shaped portion. It was confirmed that the bottom surface has a hole recessed inward.
  • the paper feed roller of Sample 19 had a textured surface with a ridge and a valley, but no hole was found in the valley.
  • the arithmetic average height Ra of the embossed surface of the paper feed roller of each sample was determined using a surface roughness shape measuring instrument (“Surfcom 1400D” manufactured by Tokyo Seimitsu Co., Ltd.).
  • Table 1 summarizes the air stirring conditions, detailed configuration of the hole, evaluation results, and the like for the paper feed rollers of each sample.
  • the paper feeding roller of the sample 19 has a textured surface including a mountain-shaped portion and a valley-shaped portion, but does not have an inwardly recessed hole on the bottom surface of the valley-shaped portion. Therefore, the paper feeding roller of the sample 19 has not been able to suppress paper feeding defects over a long period of time. This is because the ridges on the embossed surface are worn by long-term use, and the volume of the valleys that capture paper dust is insufficient, resulting in a decrease in the coefficient of friction on the roller surface.
  • the paper feeding rollers of Samples 1 to 18 have a textured surface including a mountain-shaped portion and a valley-shaped portion, and further, a hole portion recessed inward at least on the bottom surface of the valley-shaped portion. have. Therefore, the paper feeding roller is less likely to cause paper feeding problems over a long period of time. This is because, even when the ridges on the surface of the embossed surface wear due to long-term use, the presence of the holes formed in the valleys can secure a volume for escaping paper dust. . In addition, the paper feeding roller can improve the paper dust adherence to paper with a lot of paper dust, so it can be said that it is effective for making the paper feeding device in the image forming apparatus more durable and maintenance-free. .
  • the surface of the paper feeding roller of Samples 1 to 18 was observed. As a result, the paper feed rollers of Sample 1 to Sample 12 and Sample 16 to Sample 18 were not chipped on the textured surface.
  • the paper feed roller of the sample 13 in which the diameter of the hole is relatively larger than the other the paper feed roller of the sample 14 in which the area ratio of the hole is relatively larger than the other, the embossed In the paper feeding roller of Sample 15 in which the arithmetic average height Ra of the surface was relatively larger than the others, the surface of the texture was chipped.
  • the diameter of the hole is 100 ⁇ m or less
  • the area ratio of the hole is 25% or less
  • the arithmetic average height Ra of the embossed surface is 50 ⁇ m or less. It can be said that it is easy to suppress roller chipping over a long period of time, which is advantageous for improving durability.
  • the hole diameter is 1 ⁇ m or more
  • the area ratio of the hole is 1% or more
  • the arithmetic average height Ra of the embossed surface is 3 ⁇ m or more. It can also be seen that the effect of suppressing is sure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Handling Of Cut Paper (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
PCT/JP2014/078717 2013-10-30 2014-10-29 紙送り用ローラ Ceased WO2015064615A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480052037.7A CN105934398B (zh) 2013-10-30 2014-10-29 送纸辊
US15/136,049 US9790041B2 (en) 2013-10-30 2016-04-22 Paper feed roller

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013225863A JP6013305B2 (ja) 2013-10-30 2013-10-30 紙送り用ローラ
JP2013-225863 2013-10-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/136,049 Continuation US9790041B2 (en) 2013-10-30 2016-04-22 Paper feed roller

Publications (1)

Publication Number Publication Date
WO2015064615A1 true WO2015064615A1 (ja) 2015-05-07

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US (1) US9790041B2 (https=)
JP (1) JP6013305B2 (https=)
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WO (1) WO2015064615A1 (https=)

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JP6114800B1 (ja) 2015-10-23 2017-04-12 株式会社Pfu 給送ローラ
JP2018043852A (ja) * 2016-09-14 2018-03-22 住友ゴム工業株式会社 紙送りローラ、および該紙送りローラを備えた画像形成装置
JP2018070332A (ja) * 2016-10-31 2018-05-10 住友理工株式会社 紙送りロール
JP2018145010A (ja) * 2017-03-03 2018-09-20 住友化学株式会社 搬送装置及びフィルムの製造方法
JP6956678B2 (ja) * 2018-04-27 2021-11-02 住友理工株式会社 紙送りロール
JP7818971B2 (ja) * 2022-01-28 2026-02-24 住友理工株式会社 紙送りロール

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CN105934398A (zh) 2016-09-07
CN105934398B (zh) 2018-02-23

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