WO2016098675A1 - Rubber-roller shaft, and rubber roller - Google Patents

Rubber-roller shaft, and rubber roller Download PDF

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Publication number
WO2016098675A1
WO2016098675A1 PCT/JP2015/084628 JP2015084628W WO2016098675A1 WO 2016098675 A1 WO2016098675 A1 WO 2016098675A1 JP 2015084628 W JP2015084628 W JP 2015084628W WO 2016098675 A1 WO2016098675 A1 WO 2016098675A1
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WIPO (PCT)
Prior art keywords
press
rubber roller
rubber
fitting member
shaft
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PCT/JP2015/084628
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French (fr)
Japanese (ja)
Inventor
修一 和田
恒男 真下
章人 舟越
義和 浅野
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ヤマウチ株式会社
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Publication of WO2016098675A1 publication Critical patent/WO2016098675A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • 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

Definitions

  • the present invention relates to a rubber roller shaft and a rubber roller, and more specifically to a rubber roller shaft and a rubber roller of office equipment such as OA equipment.
  • a rubber roller for driving a belt of office equipment such as office automation equipment includes a shaft having a cored bar and a rubber layer covering the cored bar, and the shaft is press-fitted into the cylindrical cored bar and the cored bar. And a press-fitting member.
  • An example of such a shaft is disclosed in JP-A-11-10256 (Patent Document 1).
  • Patent Document 1 in order to prevent slipping and slipping, the insertion portion of the press-fitting member is subjected to knurl processing parallel to the insertion direction, and the knurl has a knurled peak with respect to the diameter of the insertion portion of the press-fitting member. It is disclosed that the portion is processed so as to be plus (specifically, about 0.15 mm plus on the cutting surface).
  • an object of the present invention is to provide a rubber roller shaft that improves the fastening force between a metal core and a press-fitting member.
  • Another object of the present invention is to provide a rubber roller with improved characteristics.
  • the present inventor has the problem that the force with which the core metal holds the press-fitting member is not sufficient, the knurled peak portion is plus with respect to the diameter of the insertion portion of the press-fitting member. Therefore, when the press-fitting member is press-fitted into the metal core, the area where the knurl has moved from the opening end toward the inside of the metal core is scraped by the knurling. It was found that this is due to a decrease in the power to perform.
  • the rubber roller shaft of the present invention is a shaft used for a rubber roller of office equipment, and includes a cylindrical cored bar and a press-fitting member including a press-fitted part that is press-fitted into each of the openings at both ends of the cored bar.
  • the outer peripheral surface of the press-fit portion has a region in which a plurality of recesses for receiving the inner peripheral surface portion of the cored bar are formed, and the outer diameter of this region is the same as the outer diameter of the press-fit portion.
  • a recess for receiving the inner peripheral surface portion of the cored bar is formed on the outer peripheral surface of the press-fitted portion press-fitted into the opening of the cored bar.
  • the recess is a groove extending along the extending direction of the press-fitting member.
  • the fastening force between the core metal and the press-fit member can be further improved, and the press-fit member and the core in the state where the press-fit member is press-fitted into the core metal. It can suppress that the position with gold changes.
  • the core metal and the press-fitting member are preferably made of metal. As a result, a high-strength and high-accuracy shaft can be realized while reducing the weight.
  • the outer diameter of the press-fitting portion is 1 ⁇ m or more and 40 ⁇ m or less larger than the diameter of the opening of the cored bar.
  • the fastening force between the core metal and the press-fitting member can be improved.
  • the press-fitting member can be easily press-fitted into the metal core, and the influence on the metal core by the press-fitting member pressing the metal core in a state where the press-fitting member is press-fitted into the metal core is small.
  • the length along the extending direction of the press-fit portion is 1 to 3 times the outer diameter of the press-fit portion.
  • the press-fitting member can be easily press-fitted into the core metal.
  • the width of the region is not less than 0.1 times and not more than 0.5 times the length along the extending direction of the press-fit portion.
  • the rubber roller of the present invention includes the rubber roller shaft and a rubber layer covering the surface of the shaft.
  • the shaft capable of improving the fastening force between the core metal and the press-fitting member since the shaft capable of improving the fastening force between the core metal and the press-fitting member is used, the characteristics of the rubber roller can be improved.
  • the rubber roller shaft of the present invention can improve the fastening force between the metal core and the press-fitting member. Moreover, the rubber roller of this invention can improve a characteristic.
  • FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1, schematically showing a rubber roller according to an embodiment of the present invention. It is a perspective view showing roughly the shaft for rubber rollers of an embodiment of the invention. It is a schematic diagram of the opening end vicinity of the shaft for rubber rollers of an embodiment of the invention, and shows the state which looked at the press-fitting member from the cross-sectional view of the cored bar. It is a front view which shows roughly the press fit member of embodiment of this invention.
  • FIG. 5 is a cross-sectional view taken along line VI-VI in FIG. 4 schematically showing a shaft for a rubber roller according to an embodiment of the present invention. It is sectional drawing which shows roughly the opening edge vicinity of the metal core of embodiment of this invention.
  • the rubber roller shaft and the rubber roller of the present embodiment are used for a rubber roller of office equipment such as OA equipment.
  • the rubber roller 100 includes a shaft 140 including a core metal 110 and a press-fitting member 120 shown in FIG. 3, and a rubber layer that covers the outer peripheral surface of the core metal 110. 130.
  • the rubber layer 130 has a predetermined thickness and is cylindrical, and the material constituting the rubber layer 130 is not particularly limited.
  • the shaft 140 according to the embodiment of the present invention includes a core metal 110 and a press-fitting member 120.
  • the cored bar 110 has a cylindrical shape, and the opening region is substantially constant along the axial direction.
  • a press-fitting member 120 is press-fitted into each of the openings at both ends of the cored bar 110.
  • an insertion portion 115 for inserting the press-fitting member 120 is formed in each of the openings at both ends of the core metal 110.
  • the insertion portion 115 is subjected to an inlay process.
  • the inner diameter of the insertion portion 115 is larger than the inner diameter on the inner side of the insertion portion 115.
  • a chamfer 116 is provided on the end surface on the opening side of the inner peripheral surface of the core metal 110 so that the press-fitting member 120 can be easily inserted.
  • the press-fitting member 120 includes a press-fitting part 121 that is press-fitted into each of the openings at both ends of the metal core 110, and a support shaft 122 that is continuous with the press-fitting part 121.
  • the support shaft 122 is rotatably supported by a bearing (not shown) provided in the office equipment, and transmits a driving force generated by a drive mechanism (not shown) to the core metal 110 via the press-fit portion 121.
  • the press-fit portion 121 and the support shaft 122 have a cylindrical shape with the same central axis.
  • the outer diameter of the press-fit portion 121 and the outer diameter of the support shaft 122 extend so as to be substantially constant, and the outer diameter of the press-fit portion 121 is larger than the outer diameter of the support shaft 122.
  • the outer peripheral surface of the press-fitting portion 121 has a region 124 in which a plurality of recesses 123 for receiving the inner peripheral surface portion of the core metal 110 are formed.
  • the outer diameter of this region 124 is the same as the outer diameter of the press-fit portion 121.
  • the outer diameter of the part other than the recess 123 in the region 124 is the same as the outer diameter of the part other than the region 124, and the outer diameter of the recess is smaller than the outer diameter of the part other than the region 124.
  • the press-fitting portion 121 is a cylinder having a constant outer diameter, and a recess 123 is carved on the surface of the cylinder.
  • the concave portion 123 is fitted with a thick wall including the inner peripheral surface of the core metal 110 to enhance the fastening force between the core metal 110 and the press-fit portion 121.
  • the shape of the recess 123 is not particularly limited as long as it accepts the inner peripheral surface portion of the core metal 110.
  • the recess 123 may be a dimple such as a circle or a rectangle in plan view, or may be a groove extending in one direction. It may be a groove extending in a plurality of directions.
  • the concave portion 123 of the present embodiment has an extending direction of the press-fit member 120 (left and right in FIG. 4). Direction). That is, the concave portion 123 is a flat knurled.
  • a chamfer 126 is applied to an end surface of the outer peripheral surface of the press-fitting portion 121 on the side opposite to the support shaft 122 so that the press-fitting member 120 can be easily inserted. Moreover, since the press-fitting portion 121 does not have a flange portion that expands toward the end in the axial direction, it is possible to suppress the deviation from the central axis O.
  • the outer diameter x1 of the press-fitting portion 121 shown in FIG. 5 is larger by 1 ⁇ m or more and 40 ⁇ m or less than the diameter y1 of the opening of the cored bar 110 shown in FIG.
  • the length x2 along the extending direction of the press-fit portion 121 shown in FIG. 5 is not less than 1 and not more than 3 times the outer diameter x1 of the press-fit portion 121.
  • the width x3 of the region 124 shown in FIG. 5 is not less than 0.1 times and not more than 0.5 times the length x2 along the extending direction of the press-fitting portion 121.
  • the distance x4 from the edge opposite to the support shaft 122 to the region 124 is substantially the same as the outer diameter x1 of the press-fit portion 121.
  • the pitch x5 of adjacent grooves is 0.3 mm or more and 0.7 mm or less
  • the width x6 is It is 3.0 mm or more and 4.0 mm or less
  • the depth x7 is 0.10 mm or more and 0.20 mm or less.
  • the pitch x5 is a distance connecting the centers of adjacent grooves.
  • the present inventor has found that a 1.0 mm pitch press-fitting member and a 1.0 mm pitch press-fitting member in a groove having a depth of 0.15 mm and a width of 3.5 mm have a 1.0 mm pitch press-fitting member. It has been confirmed that a shaft having a pitch of 0.5 mm has a higher fastening force between the metal core and the press-fitting member than the shaft.
  • the material constituting the metal core 110 and the press-fitting member 120 is not particularly limited, and a metal, a resin, or the like can be used, and a metal is preferable.
  • the materials constituting the metal core 110 and the press-fitting member 120 may be the same or different, but are preferably different.
  • the material constituting the metal core 110 is preferably an aluminum alloy such as JIS standard A6061 and more preferably duralumin such as JIS standard A7075 from the viewpoint of weight reduction and high accuracy.
  • As the material constituting the press-fitting member 120 for example, a SUM material plated, a carbon steel such as SUH or SUJ surface-treated, a SUS material, or the like can be used.
  • the recess 123 that receives the inner peripheral surface portion of the core metal 110 is formed on the outer peripheral surface of the press-fit portion 121 that is press-fitted into the opening of the core metal 110. Therefore, the core metal 110 and the press-fitting member 120 can be firmly fastened by the concave portion 123.
  • the recess 123 is also effective for preventing the press-fitting member 120 from rotating with respect to the core metal 110.
  • the outer diameter of the region 124 in which the concave portion 123 is formed is the same as the outer diameter of the press-fitting portion 121, even if the press-fitting portion 121 is press-fitted into the core metal 110, the region 124 moves to move the core metal 110. It is possible to prevent the inner peripheral surface 113 from being cut. For this reason, in a state where the press-fitting member 120 is inserted into the cored bar 110, the inner peripheral surface 113 closer to the opening end side of the cored bar 110 than the region 124 where the recess 123 is formed in the cored bar 110 holds the press-fitted part 121. It is possible to suppress a decrease in the power to perform.
  • the holding force between the cored bar 110 and the press-fitting portion 121 is maintained on the opening end side from the region 124 by aligning the height of the region 124 with the height of the region other than the region 124 in the press-fitting portion 121. Therefore, in a state where the press-fitting member 120 is press-fitted into the cored bar 110, it is possible to suppress changes in the positions of the press-fitted member 120 and the cored bar 110. That is, since the metal core 110 can sufficiently hold the press-fitting member 120, the positional accuracy can be improved.
  • the rubber roller shaft 140 and the rubber roller 100 that can improve the fastening force between the core metal 110 and the press-fitting member 120 can be realized. Therefore, the rubber roller shaft 140 and the rubber roller 100 according to the present embodiment are rubber rollers that are mounted on an image forming apparatus such as a printer such as a laser printer or a video printer, a copying machine, a facsimile, or a multifunction machine thereof, and is a cleaning roller. It is suitably used for various rollers such as a charging roller, a developing roller, a transfer roller, a pressure roller, a paper feed / conveying roller, and a fixing roller.
  • an image forming apparatus such as a printer such as a laser printer or a video printer, a copying machine, a facsimile, or a multifunction machine thereof, and is a cleaning roller. It is suitably used for various rollers such as a charging roller, a developing roller, a transfer roller, a pressure roller, a paper feed / conveying roller, and a fixing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

This rubber-roller shaft is used in a rubber roller for office equipment, and is provided with: a cylindrical cored bar (110); and press-fit members (120) including press-fit parts (121) which are press fitted into each of the openings at both ends of the cored bar (110). The outer circumferential surface of each of the press-fit parts (121) is provided with an area (124) in which a plurality of recesses (123) for receiving inner circumferential surface sections of the cored bar (110) are formed. The external diameter of the areas (124) is the same as that of the press-fit parts (121). This rubber roller is provided with: the rubber-roller shaft; and a rubber layer which coats the outer circumferential surface of the rubber-roller cored bar (110).

Description

ゴムローラ用シャフト及びゴムローラRubber roller shaft and rubber roller
　本発明は、ゴムローラ用シャフト及びゴムローラに関し、より特定的には、ＯＡ機器などの事務機器のゴムローラ用シャフト、及びゴムローラに関する。 The present invention relates to a rubber roller shaft and a rubber roller, and more specifically to a rubber roller shaft and a rubber roller of office equipment such as OA equipment.
　従来、ＯＡ機器などの事務機器のベルトを駆動するゴムローラは、芯金を有するシャフトと、芯金を被覆するゴム層とを備え、シャフトは、円筒状の芯金と、この芯金に圧入される圧入部材とを含んでいる。このようなシャフトとして、例えば、特開平１１－１０２５６号公報（特許文献１）が挙げられる。 Conventionally, a rubber roller for driving a belt of office equipment such as office automation equipment includes a shaft having a cored bar and a rubber layer covering the cored bar, and the shaft is press-fitted into the cylindrical cored bar and the cored bar. And a press-fitting member. An example of such a shaft is disclosed in JP-A-11-10256 (Patent Document 1).
　特許文献１には、抜け防止と空転防止とのため、圧入部材の差し込み部には差し込み方向に平行したローレット加工が施され、ローレットは、圧入部材の差し込み部の径に対してローレットの山の部分がプラス（具体的には、切削面にプラス０．１５ｍｍくらい）になるように加工されていることが開示されている。 In Patent Document 1, in order to prevent slipping and slipping, the insertion portion of the press-fitting member is subjected to knurl processing parallel to the insertion direction, and the knurl has a knurled peak with respect to the diameter of the insertion portion of the press-fitting member. It is disclosed that the portion is processed so as to be plus (specifically, about 0.15 mm plus on the cutting surface).
特開平１１－１０２５６号公報Japanese Patent Laid-Open No. 11-10256
　しかしながら、上記特許文献１では、芯金が圧入部材を保持する力が十分でないという課題があることを本発明者は見出した。このような芯金を被覆するゴム層をさらに備えるゴムローラは、特性が低下してしまう。 However, in the above-mentioned Patent Document 1, the present inventor has found that there is a problem that the force with which the core metal holds the press-fitting member is not sufficient. A rubber roller further provided with a rubber layer covering such a cored bar will deteriorate in characteristics.
　本発明は、上記問題点に鑑み、芯金と圧入部材との締結力を向上するゴムローラ用シャフトを提供することを課題とする。 In view of the above problems, an object of the present invention is to provide a rubber roller shaft that improves the fastening force between a metal core and a press-fitting member.
　また、本発明は、特性を向上するゴムローラを提供することを課題とする。 Another object of the present invention is to provide a rubber roller with improved characteristics.
　本発明者は、上記特許文献１のゴムローラ用シャフトにおいて、芯金が圧入部材を保持する力が十分でないという課題は、圧入部材の差し込み部の径に対してローレットの山の部分がプラスであるので、圧入部材を芯金に圧入すると、芯金において開口端から内部に向けてローレットが移動した領域はローレットによって削られるため、ローレットよりも開口端側の領域において、芯金が圧入部材を保持する力が低下することに起因していることを見出した。 In the rubber roller shaft of the above-mentioned Patent Document 1, the present inventor has the problem that the force with which the core metal holds the press-fitting member is not sufficient, the knurled peak portion is plus with respect to the diameter of the insertion portion of the press-fitting member. Therefore, when the press-fitting member is press-fitted into the metal core, the area where the knurl has moved from the opening end toward the inside of the metal core is scraped by the knurling. It was found that this is due to a decrease in the power to perform.
　そこで、本発明のゴムローラ用シャフトは、事務機器のゴムローラに用いられるシャフトであって、円筒状の芯金と、この芯金の両端部の開口のそれぞれに圧入される圧入部を含む圧入部材とを備え、圧入部の外周面は、芯金の内周面部を受け入れる凹部が複数形成された領域を有し、この領域の外径は、圧入部の外径と同じである。 Therefore, the rubber roller shaft of the present invention is a shaft used for a rubber roller of office equipment, and includes a cylindrical cored bar and a press-fitting member including a press-fitted part that is press-fitted into each of the openings at both ends of the cored bar. The outer peripheral surface of the press-fit portion has a region in which a plurality of recesses for receiving the inner peripheral surface portion of the cored bar are formed, and the outer diameter of this region is the same as the outer diameter of the press-fit portion.
　本発明のゴムローラ用シャフトによれば、芯金の開口に圧入される圧入部の外周面に、芯金の内周面部を受け入れる凹部が形成されている。この構成により、芯金の内周面が凹部の内部に入り込むように塑性流動することによって、芯金と圧入部材とを締結することができる。また、凹部が形成された領域の外径は圧入部の外径と同じであるので、圧入部を芯金に圧入しても、芯金の内周面が削られることを抑制できるので、芯金において凹部が形成された領域よりも芯金の開口端側の領域で圧入部材を保持する力の低下を抑制できる。したがって、圧入部材における圧入部全領域を保持することができ、芯金と圧入部材との締結力を向上することができる。 According to the shaft for a rubber roller of the present invention, a recess for receiving the inner peripheral surface portion of the cored bar is formed on the outer peripheral surface of the press-fitted portion press-fitted into the opening of the cored bar. With this configuration, the core metal and the press-fitting member can be fastened by plastic flow so that the inner peripheral surface of the core metal enters the inside of the recess. In addition, since the outer diameter of the region in which the concave portion is formed is the same as the outer diameter of the press-fit portion, even if the press-fit portion is press-fitted into the core metal, it is possible to suppress the inner peripheral surface of the core metal from being scraped. In the gold, it is possible to suppress a decrease in force for holding the press-fitting member in a region closer to the opening end of the core bar than a region where the concave portion is formed. Therefore, the entire press-fitting portion region of the press-fitting member can be held, and the fastening force between the core metal and the press-fitting member can be improved.
　本発明のゴムローラ用シャフトにおいて好ましくは、凹部は、圧入部材の延在方向に沿って延びる溝である。 In the rubber roller shaft of the present invention, preferably, the recess is a groove extending along the extending direction of the press-fitting member.
　これにより、凹部が芯金の内周面部を保持する力がより向上するので、芯金と圧入部材との締結力をより向上できるとともに、圧入部材を芯金に圧入した状態において圧入部材と芯金との位置が変化することを抑制できる。 Thereby, since the force with which the concave portion holds the inner peripheral surface portion of the core metal is further improved, the fastening force between the core metal and the press-fit member can be further improved, and the press-fit member and the core in the state where the press-fit member is press-fitted into the core metal. It can suppress that the position with gold changes.
　本発明のゴムローラ用シャフトにおいて好ましくは、芯金及び圧入部材は、金属製である。これにより、軽量化を図りつつ、高強度で高精度のシャフトを実現できる。 In the rubber roller shaft of the present invention, the core metal and the press-fitting member are preferably made of metal. As a result, a high-strength and high-accuracy shaft can be realized while reducing the weight.
　本発明のゴムローラ用シャフトにおいて好ましくは、圧入部の外径は、芯金の開口の径よりも１μｍ以上４０μｍ以下大きい。 In the rubber roller shaft of the present invention, preferably, the outer diameter of the press-fitting portion is 1 μm or more and 40 μm or less larger than the diameter of the opening of the cored bar.
　１μｍ以上の場合、芯金と圧入部材との締結力を向上できる。４０μｍ以下の場合、圧入部材を芯金に容易に圧入することができるとともに、圧入部材を芯金に圧入した状態において圧入部材が芯金を押圧することによる芯金への影響が小さい。 When the thickness is 1 μm or more, the fastening force between the core metal and the press-fitting member can be improved. In the case of 40 μm or less, the press-fitting member can be easily press-fitted into the metal core, and the influence on the metal core by the press-fitting member pressing the metal core in a state where the press-fitting member is press-fitted into the metal core is small.
　本発明のゴムローラ用シャフトにおいて好ましくは、圧入部の延在方向に沿った長さは、圧入部の外径の１倍以上３倍以下である。 In the rubber roller shaft of the present invention, preferably, the length along the extending direction of the press-fit portion is 1 to 3 times the outer diameter of the press-fit portion.
　１倍以上の場合、回転方向及び引き抜き方向のトルクを高めることができる。３倍以下の場合、圧入部材を芯金に容易に圧入することができる。 If it is more than 1 time, it is possible to increase the torque in the rotation direction and the drawing direction. In the case of 3 times or less, the press-fitting member can be easily press-fitted into the core metal.
　本発明のゴムローラ用シャフトにおいて好ましくは、上記領域の幅は、圧入部の延在方向に沿った長さの０．１倍以上０．５倍以下である。 In the rubber roller shaft of the present invention, preferably, the width of the region is not less than 0.1 times and not more than 0.5 times the length along the extending direction of the press-fit portion.
　これにより、芯金と圧入部材との締結力を向上しつつ、圧入部材を芯金に容易に圧入することができる。 This makes it possible to easily press-fit the press-fitting member into the core bar while improving the fastening force between the cored bar and the press-fitting member.
　本発明のゴムローラは、上記ゴムローラ用シャフトと、このシャフトの表面を被覆するゴム層とを備えている。 The rubber roller of the present invention includes the rubber roller shaft and a rubber layer covering the surface of the shaft.
　本発明のゴムローラによれば、芯金と圧入部材との締結力を向上できるシャフトを用いているので、ゴムローラの特性を向上することができる。 According to the rubber roller of the present invention, since the shaft capable of improving the fastening force between the core metal and the press-fitting member is used, the characteristics of the rubber roller can be improved.
　以上説明したように、本発明のゴムローラ用シャフトは、芯金と圧入部材との締結力を向上することができる。また、本発明のゴムローラは、特性を向上することができる。 As described above, the rubber roller shaft of the present invention can improve the fastening force between the metal core and the press-fitting member. Moreover, the rubber roller of this invention can improve a characteristic.
本発明の実施の形態のゴムローラを概略的に示す斜視図である。It is a perspective view showing roughly a rubber roller of an embodiment of the invention. 本発明の実施の形態のゴムローラを概略的に示し、図１におけるＩＩ－ＩＩ線に沿った断面図である。FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1, schematically showing a rubber roller according to an embodiment of the present invention. 本発明の実施の形態のゴムローラ用シャフトを概略的に示す斜視図である。It is a perspective view showing roughly the shaft for rubber rollers of an embodiment of the invention. 本発明の実施の形態のゴムローラ用シャフトの開口端近傍の模式図であり、芯金を断面視し、圧入部材を正面視した状態を示す。It is a schematic diagram of the opening end vicinity of the shaft for rubber rollers of an embodiment of the invention, and shows the state which looked at the press-fitting member from the cross-sectional view of the cored bar. 本発明の実施の形態の圧入部材を概略的に示す正面図である。It is a front view which shows roughly the press fit member of embodiment of this invention. 本発明の実施の形態のゴムローラ用シャフトを概略的に示し、図４におけるＶＩ－ＶＩ線に沿った断面図である。FIG. 5 is a cross-sectional view taken along line VI-VI in FIG. 4 schematically showing a shaft for a rubber roller according to an embodiment of the present invention. 本発明の実施の形態の芯金の開口端近傍を概略的に示す断面図である。It is sectional drawing which shows roughly the opening edge vicinity of the metal core of embodiment of this invention.
　以下、図面に基づいて本発明の実施の形態を説明する。なお、以下の図面において同一または相当する部分には同一の参照符号を付しその説明は繰り返さない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.
　図１～図７を参照して、本発明の一実施形態のゴムローラ用シャフト及びゴムローラについて説明する。本実施の形態のゴムローラ用シャフト及びゴムローラは、ＯＡ機器等の事務機器のゴムローラに用いられる。 1 to 7, a rubber roller shaft and a rubber roller according to an embodiment of the present invention will be described. The rubber roller shaft and the rubber roller of the present embodiment are used for a rubber roller of office equipment such as OA equipment.
　図１及び図２に示すように、本発明の実施の形態のゴムローラ１００は、図３に示す芯金１１０と圧入部材１２０とを含むシャフト１４０と、芯金１１０の外周面を被覆するゴム層１３０とを備えている。ゴム層１３０は所定の厚みを有し、筒状であり、ゴム層１３０を構成する材料は特に限定されない。 As shown in FIGS. 1 and 2, the rubber roller 100 according to the embodiment of the present invention includes a shaft 140 including a core metal 110 and a press-fitting member 120 shown in FIG. 3, and a rubber layer that covers the outer peripheral surface of the core metal 110. 130. The rubber layer 130 has a predetermined thickness and is cylindrical, and the material constituting the rubber layer 130 is not particularly limited.
　図３及び図４に示すように、本発明の実施の形態のシャフト１４０は、芯金１１０と、圧入部材１２０とを備えている。芯金１１０は筒状であり、開口領域は、軸線方向に沿って略一定である。芯金１１０の両端部の開口のそれぞれに圧入部材１２０が圧入されている。 3 and 4, the shaft 140 according to the embodiment of the present invention includes a core metal 110 and a press-fitting member 120. The cored bar 110 has a cylindrical shape, and the opening region is substantially constant along the axial direction. A press-fitting member 120 is press-fitted into each of the openings at both ends of the cored bar 110.
　図２及び図４に示すように、芯金１１０の両端部の開口のそれぞれには、圧入部材１２０が挿入されるための挿入部１１５が形成されている。芯金１１０が金属製である場合には、挿入部１１５には、インロー加工が施されている。なお、図４に示すように、芯金１１０において、挿入部１１５の内径は、挿入部１１５よりも内部側の内径よりも大きい。図４に示すように、芯金１１０の内周面における開口部側の端面には、圧入部材１２０を挿入しやすいように、面取り１１６が施されている。 As shown in FIG. 2 and FIG. 4, an insertion portion 115 for inserting the press-fitting member 120 is formed in each of the openings at both ends of the core metal 110. When the core metal 110 is made of metal, the insertion portion 115 is subjected to an inlay process. As shown in FIG. 4, in the metal core 110, the inner diameter of the insertion portion 115 is larger than the inner diameter on the inner side of the insertion portion 115. As shown in FIG. 4, a chamfer 116 is provided on the end surface on the opening side of the inner peripheral surface of the core metal 110 so that the press-fitting member 120 can be easily inserted.
　図２～図５に示すように、圧入部材１２０は、芯金１１０の両端部の開口のそれぞれに圧入される圧入部１２１と、この圧入部１２１と連なる支持軸１２２とを含んでいる。支持軸１２２は、事務機器に設けられた軸受け（図示せず）に回転可能に支持され、駆動機構（図示せず）で生じる駆動力を圧入部１２１を介して芯金１１０に伝達する。 As shown in FIGS. 2 to 5, the press-fitting member 120 includes a press-fitting part 121 that is press-fitted into each of the openings at both ends of the metal core 110, and a support shaft 122 that is continuous with the press-fitting part 121. The support shaft 122 is rotatably supported by a bearing (not shown) provided in the office equipment, and transmits a driving force generated by a drive mechanism (not shown) to the core metal 110 via the press-fit portion 121.
　圧入部１２１及び支持軸１２２は、中心軸線が同一の円柱状である。圧入部１２１の外径及び支持軸１２２の外径は、略一定であるように延び、圧入部１２１の外径は支持軸１２２の外径よりも大きい。 The press-fit portion 121 and the support shaft 122 have a cylindrical shape with the same central axis. The outer diameter of the press-fit portion 121 and the outer diameter of the support shaft 122 extend so as to be substantially constant, and the outer diameter of the press-fit portion 121 is larger than the outer diameter of the support shaft 122.
　図４～図６に示すように、圧入部１２１の外周面は、芯金１１０の内周面部を受け入れる凹部１２３が複数形成された領域１２４を有している。この領域１２４の外径は、圧入部１２１の外径と同じである。換言すると、領域１２４における凹部１２３以外の部分の外径は、領域１２４以外の部分の外径と同じであり、凹部の外径は、領域１２４以外の部分の外径よりも小さい。さらに換言すると、圧入部１２１は、外径が一定の円柱であり、円柱の表面に凹部１２３が彫られてなる。 As shown in FIGS. 4 to 6, the outer peripheral surface of the press-fitting portion 121 has a region 124 in which a plurality of recesses 123 for receiving the inner peripheral surface portion of the core metal 110 are formed. The outer diameter of this region 124 is the same as the outer diameter of the press-fit portion 121. In other words, the outer diameter of the part other than the recess 123 in the region 124 is the same as the outer diameter of the part other than the region 124, and the outer diameter of the recess is smaller than the outer diameter of the part other than the region 124. In other words, the press-fitting portion 121 is a cylinder having a constant outer diameter, and a recess 123 is carved on the surface of the cylinder.
　図６に示すように、凹部１２３には、芯金１１０の内周面を含む厚肉が嵌合されて、芯金１１０と圧入部１２１との締結力を高めている。凹部１２３の形状は、芯金１１０の内周面部を受け入れる形状であれば特に限定されず、例えば、平面視において円形、矩形等のディンプルであってもよく、一方方向に延びる溝であってもよく、複数方向に延びる溝であってもよい。芯金１１０と圧入部１２１との締結力を高めつつ、圧入部１２１を芯金１１０に挿入しやすい観点から、本実施の形態の凹部１２３は、圧入部材１２０の延在方向（図４において左右方向）に沿って延びる溝である。つまり、凹部１２３は平目ローレットである。 As shown in FIG. 6, the concave portion 123 is fitted with a thick wall including the inner peripheral surface of the core metal 110 to enhance the fastening force between the core metal 110 and the press-fit portion 121. The shape of the recess 123 is not particularly limited as long as it accepts the inner peripheral surface portion of the core metal 110. For example, the recess 123 may be a dimple such as a circle or a rectangle in plan view, or may be a groove extending in one direction. It may be a groove extending in a plurality of directions. From the viewpoint of facilitating insertion of the press-fit portion 121 into the core metal 110 while increasing the fastening force between the core metal 110 and the press-fit portion 121, the concave portion 123 of the present embodiment has an extending direction of the press-fit member 120 (left and right in FIG. 4). Direction). That is, the concave portion 123 is a flat knurled.
　図４に示すように、圧入部１２１の外周面における支持軸１２２と反対側の端面には、圧入部材１２０を挿入しやすいように、面取り１２６が施されている。また、圧入部１２１は、軸線方向端部に向けて拡径するフランジ部を有していないので、中心軸線Ｏからのずれを抑制できる。 As shown in FIG. 4, a chamfer 126 is applied to an end surface of the outer peripheral surface of the press-fitting portion 121 on the side opposite to the support shaft 122 so that the press-fitting member 120 can be easily inserted. Moreover, since the press-fitting portion 121 does not have a flange portion that expands toward the end in the axial direction, it is possible to suppress the deviation from the central axis O.
　ここで、図５～図７を参照して、圧入部材１２０の寸法の一例を挙げる。図５に示す圧入部１２１の外径ｘ１は、図７に示す芯金１１０の開口の径ｙ１よりも１μｍ以上４０μｍ以下大きい。図５に示す圧入部１２１の延在方向に沿った長さｘ２は、圧入部１２１の外径ｘ１の１倍以上３倍以下である。図５に示す領域１２４の幅ｘ３は、圧入部１２１の延在方向に沿った長さｘ２の０．１倍以上０．５倍以下である。図５に示す圧入部１２１において支持軸１２２と反対側の端縁から領域１２４までの距離ｘ４は、圧入部１２１の外径ｘ１と略同じである。 Here, an example of the size of the press-fitting member 120 will be described with reference to FIGS. The outer diameter x1 of the press-fitting portion 121 shown in FIG. 5 is larger by 1 μm or more and 40 μm or less than the diameter y1 of the opening of the cored bar 110 shown in FIG. The length x2 along the extending direction of the press-fit portion 121 shown in FIG. 5 is not less than 1 and not more than 3 times the outer diameter x1 of the press-fit portion 121. The width x3 of the region 124 shown in FIG. 5 is not less than 0.1 times and not more than 0.5 times the length x2 along the extending direction of the press-fitting portion 121. In the press-fit portion 121 shown in FIG. 5, the distance x4 from the edge opposite to the support shaft 122 to the region 124 is substantially the same as the outer diameter x1 of the press-fit portion 121.
　図５及び図６に示すように、凹部１２３が圧入部材１２０の延在方向に沿って延びる溝である場合、隣り合う溝のピッチｘ５は、０．３ｍｍ以上０．７ｍｍ以下で、幅ｘ６は３．０ｍｍ以上４．０ｍｍ以下で、深さｘ７は０．１０ｍｍ以上０．２０ｍｍ以下である。なお、ピッチｘ５とは、隣り合う溝の中心を結ぶ距離である。本発明者は、深さが０．１５ｍｍで幅が３．５ｍｍの溝において、１．０ｍｍのピッチの圧入部材と０．５ｍｍのピッチの圧入部材とでは、１．０ｍｍのピッチの圧入部材のシャフトよりも０．５ｍｍのピッチのシャフトの方が芯金と圧入部材との締結力が高いことを確認している。 As shown in FIGS. 5 and 6, when the recess 123 is a groove extending along the extending direction of the press-fitting member 120, the pitch x5 of adjacent grooves is 0.3 mm or more and 0.7 mm or less, and the width x6 is It is 3.0 mm or more and 4.0 mm or less, and the depth x7 is 0.10 mm or more and 0.20 mm or less. The pitch x5 is a distance connecting the centers of adjacent grooves. The present inventor has found that a 1.0 mm pitch press-fitting member and a 1.0 mm pitch press-fitting member in a groove having a depth of 0.15 mm and a width of 3.5 mm have a 1.0 mm pitch press-fitting member. It has been confirmed that a shaft having a pitch of 0.5 mm has a higher fastening force between the metal core and the press-fitting member than the shaft.
　芯金１１０及び圧入部材１２０を構成する材料は特に限定されず、金属、樹脂などを用いることができ、金属であることが好ましい。芯金１１０及び圧入部材１２０を構成する材料は同一であっても異なっていてもよいが、異なっていることが好ましい。芯金１１０を構成する材料は、軽量化及び高精度の観点から、ＪＩＳ規格Ａ６０６１などのアルミニウム合金が好ましく、ＪＩＳ規格Ａ７０７５などのジュラルミンがより好ましい。圧入部材１２０を構成する材料は、例えば、ＳＵＭ材にめっきが施されたもの、ＳＵＨ、ＳＵＪなどの炭素鋼に表面処理がされたもの、ＳＵＳ材などを用いることができる。 The material constituting the metal core 110 and the press-fitting member 120 is not particularly limited, and a metal, a resin, or the like can be used, and a metal is preferable. The materials constituting the metal core 110 and the press-fitting member 120 may be the same or different, but are preferably different. The material constituting the metal core 110 is preferably an aluminum alloy such as JIS standard A6061 and more preferably duralumin such as JIS standard A7075 from the viewpoint of weight reduction and high accuracy. As the material constituting the press-fitting member 120, for example, a SUM material plated, a carbon steel such as SUH or SUJ surface-treated, a SUS material, or the like can be used.
　以上説明したように、本実施の形態のゴムローラ用シャフト１４０は、芯金１１０の開口に圧入される圧入部１２１の外周面に、芯金１１０の内周面部を受け入れる凹部１２３が形成されているので、凹部１２３により芯金１１０と圧入部材１２０とを強固に締結することができる。なお、凹部１２３は、芯金１１０に対する圧入部材１２０の回り止めにも有効である。 As described above, in the rubber roller shaft 140 according to the present embodiment, the recess 123 that receives the inner peripheral surface portion of the core metal 110 is formed on the outer peripheral surface of the press-fit portion 121 that is press-fitted into the opening of the core metal 110. Therefore, the core metal 110 and the press-fitting member 120 can be firmly fastened by the concave portion 123. The recess 123 is also effective for preventing the press-fitting member 120 from rotating with respect to the core metal 110.
　また、凹部１２３が形成された領域１２４の外径は圧入部１２１の外径と同じであるので、圧入部１２１を芯金１１０に圧入しても、領域１２４が移動することにより芯金１１０の内周面１１３が削られることを抑制できる。このため、芯金１１０に圧入部材１２０が挿入された状態において、芯金１１０において凹部１２３が形成された領域１２４よりも芯金１１０の開口端側の内周面１１３は、圧入部１２１を保持する力の低下を抑制できる。つまり、圧入部１２１において領域１２４の高さを領域１２４以外の領域の高さに揃えることで、領域１２４から開口端側において芯金１１０と圧入部１２１との保持力が維持される。したがって、圧入部材１２０を芯金１１０に圧入した状態において、圧入部材１２０と芯金１１０との位置が変化することを抑制できる。つまり、芯金１１０が圧入部材１２０を十分に保持できるので、位置精度を向上できる。 In addition, since the outer diameter of the region 124 in which the concave portion 123 is formed is the same as the outer diameter of the press-fitting portion 121, even if the press-fitting portion 121 is press-fitted into the core metal 110, the region 124 moves to move the core metal 110. It is possible to prevent the inner peripheral surface 113 from being cut. For this reason, in a state where the press-fitting member 120 is inserted into the cored bar 110, the inner peripheral surface 113 closer to the opening end side of the cored bar 110 than the region 124 where the recess 123 is formed in the cored bar 110 holds the press-fitted part 121. It is possible to suppress a decrease in the power to perform. That is, the holding force between the cored bar 110 and the press-fitting portion 121 is maintained on the opening end side from the region 124 by aligning the height of the region 124 with the height of the region other than the region 124 in the press-fitting portion 121. Therefore, in a state where the press-fitting member 120 is press-fitted into the cored bar 110, it is possible to suppress changes in the positions of the press-fitted member 120 and the cored bar 110. That is, since the metal core 110 can sufficiently hold the press-fitting member 120, the positional accuracy can be improved.
　このように、本実施の形態では、芯金１１０と圧入部材１２０との締結力を向上できるゴムローラ用シャフト１４０及びゴムローラ１００を実現できる。したがって、本実施の形態のゴムローラ用シャフト１４０及びゴムローラ１００は、レーザープリンタ、ビデオプリンタなどのプリンタ、複写機、ファクシミリ、これらの複合機等の画像形成装置に装着されるゴムローラであって、クリーニングローラ、帯電ローラ、現像ローラ、転写ローラ、加圧ローラ、紙送り搬送ローラ、定着ローラなどの各種ローラに好適に用いられる。 Thus, in the present embodiment, the rubber roller shaft 140 and the rubber roller 100 that can improve the fastening force between the core metal 110 and the press-fitting member 120 can be realized. Therefore, the rubber roller shaft 140 and the rubber roller 100 according to the present embodiment are rubber rollers that are mounted on an image forming apparatus such as a printer such as a laser printer or a video printer, a copying machine, a facsimile, or a multifunction machine thereof, and is a cleaning roller. It is suitably used for various rollers such as a charging roller, a developing roller, a transfer roller, a pressure roller, a paper feed / conveying roller, and a fixing roller.
　今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した実施の形態ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.
　１００　ゴムローラ、１１０　芯金、１１３　内周面、１１５　挿入部、１１６，１２６　面取り、１２０　圧入部材、１２１　圧入部、１２２　支持軸、１２３　凹部、１２４　領域、１３０　ゴム層、１４０　シャフト、Ｏ　中心軸線。 100 rubber roller, 110 cored bar, 113 inner peripheral surface, 115 insertion part, 116, 126 chamfer, 120 press-fitting member, 121 press-fitting part, 122 support shaft, 123 concave part, 124 region, 130 rubber layer, 140 shaft, O central axis.

Claims (7)

  1. 　事務機器のゴムローラに用いられるシャフトであって、
    　円筒状の芯金と、
    　前記芯金の両端部の開口のそれぞれに圧入される圧入部を含む圧入部材とを備え、
    　前記圧入部の外周面は、前記芯金の内周面部を受け入れる凹部が複数形成された領域を有し、
    　前記領域の外径は、前記圧入部の外径と同じである、ゴムローラ用シャフト。     A shaft used for a rubber roller of office equipment,
    A cylindrical cored bar,
    A press-fitting member including a press-fitting part that is press-fitted into each of the openings at both ends of the core metal
    The outer peripheral surface of the press-fit portion has a region where a plurality of recesses for receiving the inner peripheral surface portion of the core metal are formed,
    The rubber roller shaft, wherein the outer diameter of the region is the same as the outer diameter of the press-fit portion.
  2. 　前記凹部は、前記圧入部材の延在方向に沿って延びる溝である、請求項１に記載のゴムローラ用シャフト。 The rubber roller shaft according to claim 1, wherein the concave portion is a groove extending along an extending direction of the press-fitting member.
  3. 　前記芯金及び前記圧入部材は、金属製である、請求項１または２に記載のゴムローラ用シャフト。 The shaft for a rubber roller according to claim 1 or 2, wherein the core metal and the press-fitting member are made of metal.
  4. 　前記圧入部の外径は、前記芯金の開口の径よりも１μｍ以上４０μｍ以下大きい、請求項１～３のいずれか１項に記載のゴムローラ用シャフト。 The rubber roller shaft according to any one of claims 1 to 3, wherein an outer diameter of the press-fitting portion is 1 µm or more and 40 µm or less larger than a diameter of the opening of the cored bar.
  5. 　前記圧入部の延在方向に沿った長さは、前記圧入部の外径の１倍以上３倍以下である、請求項１～４のいずれか１項に記載のゴムローラ用シャフト。 The rubber roller shaft according to any one of claims 1 to 4, wherein a length along the extending direction of the press-fit portion is not less than 1 and not more than 3 times an outer diameter of the press-fit portion.
  6. 　前記領域の幅は、前記圧入部の延在方向に沿った長さの０．１倍以上０．５倍以下である、請求項１～５のいずれか１項に記載のゴムローラ用シャフト。 The rubber roller shaft according to any one of claims 1 to 5, wherein the width of the region is not less than 0.1 times and not more than 0.5 times the length along the extending direction of the press-fitting portion.
  7. 　請求項１～６のいずれか１項に記載のゴムローラ用シャフトと、
    　前記シャフトの表面を被覆するゴム層とを備える、ゴムローラ。     A rubber roller shaft according to any one of claims 1 to 6,
    A rubber roller comprising a rubber layer covering the surface of the shaft.
PCT/JP2015/084628 2014-12-17 2015-12-10 Rubber-roller shaft, and rubber roller WO2016098675A1 (en)

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JP2014-255214 2014-12-17
JP2014255214A JP2016114206A (en) 2014-12-17 2014-12-17 Rubber roller shaft and rubber roller

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WO2016098675A1 true WO2016098675A1 (en) 2016-06-23

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122638U (en) * 1984-07-17 1986-02-10 北辰工業株式会社 Core metal for rolls

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122638U (en) * 1984-07-17 1986-02-10 北辰工業株式会社 Core metal for rolls

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