JP2015090396A - Stain-resistant conveyance roller having durability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stain-resistant conveyance roller having durability that improves the releasability of the surface of the roller and maintains the releasability for a long period to prevent the occurrence of stains, such as an unfixed toner and ink on the surface of the roller.SOLUTION: In a stain-resistant conveyance roller having durability, a particle layer 4 for providing a force to convey recording sheets is provided on the surface of a rubber roller 3, and a release layer 5 for preventing stains is formed on the surface of the rubber roller 3 and the surface of the particle layer 4.

Description

  The present invention relates to a stain-resistant transport roller having durability.

  In recent years, a transport roller immediately after image formation used in an electrophotographic copying machine, a printer, or the like has been required to send recording paper in a state where toner and ink are not fixed due to space saving and high speed. Furthermore, there are various toners and inks due to improvements in image quality, compatibility with various paper qualities, energy conservation, etc., and the surface of the transport roller immediately after image formation is likely to be contaminated. There are problems such as influence and retransfer of toner and ink to recording paper.

  FIG. 3 is a schematic diagram showing a configuration of a conventional transport roller, and FIG. 4 is a schematic diagram showing a partial cross section of the transport roller.

  In these drawings, 101 is a transport roller, 102 is a metal core, 103 is a rubber roller, and 104 is a particle layer provided on the surface of the rubber roller 103.

  As described above, in the conventional conveyance roller, the particle layer 104 is formed on the surface of the rubber roller 103 in order to impart conveyance force (grip force) and to prevent contamination. The formation of the particle layer 104 is intended to improve the conveyance force to the recording paper and to provide releasability by point contact with the recording paper to which toner or ink is not fixed.

JP-A-7-53084 JP 2000-313541 A Japanese Patent Laid-Open No. 2002-037439 JP 2003-267583 A JP 2004-301293 A JP-A-7-205508 JP 2001-315987 A Japanese Patent Laid-Open No. 2002-086064 JP 2004-081981 A

  In view of the above situation, the present invention improves the releasability of the roller surface and the particle layer surface and maintains the releasability for a long period of time, thereby preventing unfixed toner and ink from being applied to the roller surface. An object of the present invention is to provide a stain-resistant transport roller that does not cause dirt and has durability.

In order to achieve the above object, the present invention provides
[1] In a stain-resistant transport roller having durability, a particle layer for providing a recording paper transport force is provided on the surface of the rubber roller, and a release layer for preventing contamination on the surface of the rubber roller and the surface of the particle layer It is characterized by forming.

  [2] The anti-contamination transport roller having durability described in [1], wherein the transport roller is disposed after the fixing device, and is disposed immediately after image formation.

  [3] The antifouling transport roller having durability according to [1] or [2], wherein the release layer is made of a fluororesin having wear resistance.

  [4] The anti-contamination transport roller having durability as described in [3] above, wherein ethylene fluoride / propylene (FEP) having a low baking temperature is melt-formed on a silicone rubber having high heat resistance.

  [5] The anti-contamination transport roller having durability described in [3], wherein the fluororesin particles are fixed to the highly heat-resistant silicone rubber instead of being melted.

  [6] In the contamination-resistant transport roller having durability described in [3], a fluororesin (PFA: perfluoroalkoxy fluororesin) is melt-formed on rubber.

  [7] In the contamination-resistant transport roller having durability described in [1] or [2], glass beads or ceramic is used for the particle layer.

  According to the present invention, in particular, by forming a release layer on the surface of the rubber roller and the surface of the particle layer formed on the conveying roller immediately after image formation, toner and ink stains on the surface of the conveying roller can be prevented, and the recording paper In addition to the gripping force, it is possible to maintain the anti-stain property due to point contact and to enhance the durability of the intended conveying roller.

  In addition, by using a fluororesin having excellent wear resistance for the release layer to be formed, release properties (stain prevention properties) can be maintained.

It is a schematic diagram which shows the structure of the contamination-resistant conveyance roller which has durability of this invention. It is a schematic diagram which shows the partial cross section of the contamination-resistant conveyance roller which has durability of this invention. It is a schematic diagram which shows the structure of the conventional conveyance roller. It is a schematic diagram which shows the partial cross section of the conventional conveyance roller.

  The contamination-resistant transport roller having durability according to the present invention is provided with a particle layer for imparting a recording paper transport force on the surface of a rubber roller, and a release layer for preventing contamination on the surface of the rubber roller and the surface of the particle layer. To form.

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 is a schematic diagram showing a configuration of a stain-resistant transport roller having durability according to the present invention, and FIG. 2 is a schematic diagram showing a partial cross-sectional view of the stain-resistant transport roller having durability.

  In these drawings, reference numeral 1 is arranged after the fixing device, in particular, a conveying roller suitable for arrangement immediately after image formation, 2 is a metal core, 3 is a rubber roller, and 4 is a particle layer provided on the surface of the rubber roller 3. Reference numeral 5 denotes a release layer formed on the surfaces of the rubber roller 3 and the particle layer 4.

  As described above, the particle layer 4 for imparting the recording paper conveying force to the surface of the rubber roller 3 and the release layer 5 for preventing contamination are formed on the surfaces of the rubber roller 3 and the particle layer 4. In addition to the gripping force, the anti-stain property due to point contact can be maintained, and the durability as the intended conveying roller can be enhanced.

  In particular, it is possible to provide a conveyance roller that is disposed after the fixing device, and particularly suitable for being disposed immediately after image formation.

  Further, it is desirable to use a fluororesin having abrasion resistance as the release layer 5.

  Further, it is desirable to use glass beads or ceramic as the particle layer 4.

  Table 1 shows a comparison of evaluation of the antifouling effect with the conventional comparative examples 1 and 2 by giving specific examples of the present invention.

  The contact angle of each roller was measured under the following measurement conditions, and the antifouling effect was confirmed.

  Measurement conditions: Liquid used: Water, Droplet weight: 2 μl, Calculation method: (θ / 2) method

比較例１の場合は、母材がゴム、表面処理は研磨のみ、接触角（°）は７３
比較例２の場合は、母材がゴム、表面処理は研磨＋セラミックコート、接触角（°）は８２であるのに対して、本発明の実施例の場合は、母材がゴム、表面処理は研磨＋セラミックコート（粒子層）＋フッ素樹脂コート（離型層）、接触角（°）は１１３である。

In the case of Comparative Example 1, the base material is rubber, the surface treatment is polishing only, and the contact angle (°) is 73.
In the case of Comparative Example 2, the base material is rubber, the surface treatment is polishing + ceramic coat, and the contact angle (°) is 82, whereas in the example of the present invention, the base material is rubber and the surface treatment. Is polishing + ceramic coat (particle layer) + fluorine resin coat (release layer), and the contact angle (°) is 113.

  As described above, in the case of the conveying roller of the present invention, since the fluororesin coat as the release layer is further formed on the ceramic coat as the particle layer, the value of the contact angle (°) is large and the soiling property is increased. It was confirmed that the countermeasure effect was high.

  If a fluororesin coat is provided on the surface of the rubber coated with a ceramic coat, the durability and stain resistance can be further improved as compared with the case of the ceramic coat alone.

Moreover, as a film-forming aspect, for example,
(1) Fluoroethylene propylene (FEP) having a low firing temperature is melt-formed on a rubber having high heat resistance (for example, silicone rubber).

  (2) Fluorine resin particles are fixed to a rubber having high heat resistance (for example, silicone rubber) instead of melting.

(3) A fluororesin (PFA: perfluoroalkoxy fluororesin) is melt-formed on a normal rubber.
be able to.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The contamination-resistant transport roller having durability according to the present invention improves the releasability of the roller surface and maintains the releasability for a long period of time, thereby preventing unfixed toner and ink from being applied to the roller surface. It can be used as a dirty countermeasure transport roller that does not cause dirt and has excellent durability.

DESCRIPTION OF SYMBOLS 1 Conveyance roller 2 Core metal 3 Rubber roller 4 Particle layer provided on rubber roller surface 5 Release layer formed on the surface of rubber roller and particle layer

Claims (7)

  Contamination resistance with durability characterized by providing a particle layer on the surface of the rubber roller to give recording paper conveying force, and forming a release layer for preventing dirt on the surface of the rubber roller and the surface of the particle layer Transfer roller. The durable stain-resistant transport roller according to claim 1, wherein the transport roller is disposed after the fixing device, and particularly, immediately after image formation. roller. 3. A durable stain-resistant transport roller according to claim 1, wherein a fluororesin having wear resistance is used for the release layer. 5. The durability-resistant stain-resistant conveying roller according to claim 3, wherein the film is formed by melting film of fluorinated ethylene propylene (FEP) having a low firing temperature on a silicone rubber having high heat resistance. Contaminated transport roller. 4. The durable stain resistant transport roller according to claim 3, wherein the fluororesin particles are fixed to the highly heat resistant silicone rubber instead of being melted. 5. The durability and contamination-resistant transport roller according to claim 3, wherein a fluororesin (PFA: perfluoroalkoxy fluororesin) is melt-formed on rubber. The durable stain-resistant transport roller according to claim 1 or 2, wherein glass particles or ceramic is used for the particle layer.

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