WO2011077817A1 - Courroie dentée - Google Patents

Courroie dentée Download PDF

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Publication number
WO2011077817A1
WO2011077817A1 PCT/JP2010/068459 JP2010068459W WO2011077817A1 WO 2011077817 A1 WO2011077817 A1 WO 2011077817A1 JP 2010068459 W JP2010068459 W JP 2010068459W WO 2011077817 A1 WO2011077817 A1 WO 2011077817A1
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WO
WIPO (PCT)
Prior art keywords
belt
core wire
diameter
pulley
toothed belt
Prior art date
Application number
PCT/JP2010/068459
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English (en)
Japanese (ja)
Inventor
勇次 関口
伸二 藤原
Original Assignee
バンドー化学株式会社
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 バンドー化学株式会社 filed Critical バンドー化学株式会社
Publication of WO2011077817A1 publication Critical patent/WO2011077817A1/fr

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    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/06—Driving-belts made of rubber
    • F16G1/08—Driving-belts made of rubber with reinforcement bonded by the rubber
    • F16G1/10—Driving-belts made of rubber with reinforcement bonded by the rubber with textile reinforcement

Definitions

  • the present invention relates to a toothed belt.
  • the present invention relates to a toothed belt used for driving a general OA device or a printer.
  • toothed belts with a tooth pitch of 1.0 mm, 1.5 mm, 2 mm, and 3 mm are mainly used.
  • use with a smaller pulley diameter, low speed fluctuation, and the like have been demanded.
  • printing unevenness has occurred due to belt speed fluctuations at the meshing cycle peculiar to toothed belts.
  • even in an apparatus using a toothed belt as a card / banknote discriminator there is a problem that the speed of the conveyed product varies due to uneven speed of the meshing cycle and cannot be accurately identified. On the other hand, it is necessary to reduce the size of the motor and save the equipment.
  • the pulley pitch diameter currently used for the drive belt of the printer is ⁇ 6.468 mm (pitch 1.016 mm, number of teeth 20). However, due to the labor saving of the motor, there has been a demand to use a smaller diameter.
  • the tooth shape of the belt is a round tooth, and the inter-tooth pitch of the belt is 0.75 to 1.0 mm.
  • a core wire of the toothed belt an aramid having a diameter of 0.10 to 0.20 mm obtained by bundling at least one filament group in which aramid fibers made of monofilament of 0.5 to 2.0 denier are bundled and twisted. A fiber rope is used.
  • a toothed belt in which 5 to 80 parts by weight of a porous filler is added to 100 parts by weight of an elastomer constituting a toothed belt, and the back of the belt is polished to expose the porous filler to the back of the belt.
  • a porous filler is added to 100 parts by weight of an elastomer constituting a toothed belt, and the back of the belt is polished to expose the porous filler to the back of the belt.
  • the object of the present invention is to develop a toothed belt that can be used with a small-diameter pulley.
  • an object of the present invention is to develop a toothed belt that can be used with a smaller diameter than a pulley pitch diameter of 6.468 mm (pitch: 1.016 mm, number of teeth: 20).
  • the main configuration of the present invention is as follows. 1.
  • 2. 1. Add 0.5 to 1.5% by weight of carbon to the urethane layer.
  • Carbon is electrically conductive and is characterized by the addition of 0.5 to 1.5% by weight of electrically conductive carbon.
  • Carbon is conductive and the belt has an electric resistance of 10 ⁇ 5 to 10 ⁇ 8 ⁇ ⁇ cm.
  • the urethane toothed belt as described.
  • a urethane precision belt having a smaller pitch can be provided. Since it can be used with a small-diameter pulley, the motor can be miniaturized and the equipment can be saved. By setting the pulley pitch diameter to 6.468 mm (pitch: 1.016 mm, number of teeth: 20), it was possible to realize a toothed belt that can be used with a smaller diameter. By twisting a glass fiber core wire to a thin wire diameter using a thin fiber, it was possible to realize a toothed belt that can sufficiently bend the curvature of a small pulley. By downsizing the motor, it can contribute to power saving and downsizing and weight reduction of the device. 2.
  • the dimensional change due to the influence of humidity is small, and the dimensional stability is improved.
  • the pulley becomes smaller in diameter, the clearance between the pulley teeth and the belt teeth becomes smaller, so that the meshing interference between the belt and the pulley is likely to occur due to the dimensional change, which causes the speed fluctuation to increase.
  • the stability could be improved, it can sufficiently cope with a small-diameter pulley and can suppress the speed fluctuation of the timing belt. 3. Since the speed fluctuation is small, image unevenness can be reduced. 4). Wear resistance can be improved by adding carbon.
  • the wear resistance of the urethane tooth portion can be improved. 5.
  • the number of rotations of the pulley is higher than when a large pulley is used.
  • the meshing speed of the belt and pulley teeth is increased, and the belt slides more with the pulley, so that static electricity is more likely to be generated.
  • By adding conductive carbon charging of the belt, pulley, and peripheral parts can be suppressed, and the ink mist can be prevented from being contaminated in the ink jet printer.
  • Belt wearing schematic configuration diagram Belt structure schematic Graph showing minimum and maximum speed fluctuations
  • Endurance test schematic diagram Graph showing the residual strength retention after 2 million reciprocations for core wire diameter
  • Dimensional stability test schematic diagram Graph showing dimensional change characteristics due to environmental humidity for glass core wire and aramid core wire Graph showing the dimensional change characteristics of glass core polyester core wire with environmental temperature
  • the present invention has been researched and developed with respect to a material, a wire diameter, a configuration, and a twist of a core wire that can be used even with a pulley pitch diameter of ⁇ 5.840 mm for a urethane toothed belt.
  • These examination elements have been found to contain the following contradictory items in the process of research and development, and it is difficult to deal with them with a simple solution. Since the core wire of the belt is polygonal when it is wound around the inner mold for molding, if the pulley for the toothed belt is small, the number of polygonal corners will be reduced if the pulley pitch is the same as the conventional one. Speed fluctuation due to fluctuation of the core wire pitch becomes large. As a solution, the pitch may be reduced.
  • the core wire material includes polyester fiber and aramid fiber, but the polyester fiber core wire has lower strength and a greater dimensional change due to temperature than the glass cord.
  • the aramid fiber has the same strength as the glass fiber, but the dimensional change due to the influence of humidity is large, and it has been found that the dimensional change causes meshing interference between the belt and the pulley, which causes a large speed fluctuation.
  • the tooth pitch is preferably 0.65 to 0.85 mm.
  • the tooth pitch is reduced, the tooth size is reduced, so that the surface pressure applied to the belt is increased, the belt tooth portion is worn, and the belt is damaged or shortened. For this reason, it is necessary to take measures against wear of the urethane tooth portion.
  • the addition of carbon was studied in order to improve the wear resistance.
  • the means for covering the surface with canvas is not suitable for the structure of a toothed belt because the ratio of the canvas to the tooth part becomes high and the resin amount of the tooth part cannot be secured sufficiently with a small pitch tooth profile. It is.
  • No canvas is used in the belt of the present invention.
  • a conventional urethane belt is an insulating type.
  • the problem of charging the parts due to sliding with the pulley increases.
  • a machine using a scale for example, a carriage driving belt of an ink jet printer, when the scale is charged, ink mist is drawn, the scale is contaminated, and positioning control becomes impossible.
  • the urethane toothed belt of the present invention is a urethane toothed belt having a core wire made of glass cord and a tooth pitch of 0.65 to 0.85 mm.
  • the core wire has a wire diameter of 0.20 to 0.28 mm, and the fibers constituting the core wire preferably have a diameter of 6 to 9 microns.
  • a material used for urethane toothed belts can be used.
  • the glass cord As an example of the glass cord, a cord configuration having a fiber diameter of 9 ⁇ m, a strand fiber number of 200, a strand count of 34 tex (g / 1000 m), two twisted strands, a twisted yarn number of 1, and a twisted number of 3.7 tpi is used. Can be mentioned.
  • the cord characteristics are as follows: the center value is a count of 84 g / 1000 m, the loss on ignition is 16% by weight, the number of twists is 3.7 tpi, the cord diameter is 0.24 mm, and the minimum tensile strength is 49N. 2.
  • the amount of carbon added for wear resistance to the urethane layer is preferably 0.5 to 1.5% by weight.
  • the additive carbon examples include carbon black such as thermal black, ketjen black, acetylene black, channel black, color black, and furnace black. 3.
  • the carbon to be added is conductive, and the amount of conductive carbon added is preferably 0.5 to 1.5% by weight.
  • the additive conductive carbon include ketjen black and acetylene black. If the amount added is too large, carbon aggregates in the polyurethane, and the tooth chipping durability of the belt deteriorates. Moreover, when the addition amount is too large, the viscosity of the polyurethane becomes high, and when forming the belt shape by casting urethane into the gap between the outer mold and the inner mold, formation failure due to air mixing occurs. 4).
  • Carbon is electrically conductive and the belt has an electric resistance of 10 ⁇ 5 to 10 ⁇ 8 ⁇ ⁇ cm.
  • the urethane toothed belt as described.
  • the amount of conductive carbon added is 0.5 to 1.5% by weight, desirably 0.8 to 1.2% by weight.
  • the electrical resistance is 10 ⁇ 5 to 10 ⁇ 8 ⁇ ⁇ cm, preferably 10 ⁇ 6 to 10 ⁇ 7 ⁇ ⁇ cm.
  • Examples of carbon imparting conductivity include conductive carbon black such as thermal black, ketjen black, acetylene black, channel black, color black, and furnace black, and graphite. 5.
  • the pitch circle diameter of pulleys used in glass fiber core wire urethane toothed belts was, for example, ⁇ 6.468 mm (pitch 1.016 mm, type 20 teeth) for driving an inkjet printer carriage.
  • a precision belt made of urethane that can be used for a small diameter pulley having a diameter of 5.840 mm (pitch: 0.7056 mm, 26 teeth) can be realized. 6).
  • the precision urethane belt of the present invention includes a carriage for driving a printer, an endless transport belt made of an elastomer for transporting cards, bills, etc., a carriage for a printer, a bill transport belt, a card transport belt, and a light belt.
  • toothed belt drive devices and toothed belt OA equipment (office equipment) used for load drive belts for example, printer carriage drive, paper feed, copier paper feed and photosensitive drum drive Used for etc.
  • a toothed belt having a normal configuration including a back portion made of urethane resin, a tooth portion, and a core wire was prepared by a normal manufacturing method.
  • no canvas is used.
  • the type of urethane is a composition usually used for urethane belts.
  • Ketjen Black EC-300J manufactured by Lion
  • the plasticizer DOP manufactured by CGS Star Co., di-2ethylhexyl phthalate, or the like can be added.
  • the measured speed fluctuation rates for Examples 2, 7, and 8 and Comparative Examples 7 and 8 are shown in Table 3, and a graph of the minimum value and the maximum value of the speed fluctuation rate is shown in FIG.
  • Comparative Example 7 can minimize the speed fluctuation rate, and Comparative Example 8 has a speed fluctuation rate of 2.5% or more, and sufficient stability cannot be obtained.
  • the small-diameter drive pulley pitch of the present invention it is estimated that the influence by the winding of the core wire around the polygon in the molding process is greatly affected when the tooth pitch is 0.9 mm. This result can be considered that a toothed belt having a tooth pitch of 0.85 mm or less is suitable for a small pulley having a drive pulley diameter of 6.0 mm or less and 20 or more teeth. From FIG. 3, it can be confirmed that Examples 2, 7, and 8 and Comparative Example 7 have a speed fluctuation rate of 2.5% or less and the width is small, but Comparative Example 8 has a speed fluctuation rate range. Is not suitable for fine driving control such as printing.
  • Table 5 shows specific numerical data for Examples 3, 4, and 6 and Comparative Examples 1, 2, 3, 4, and 9.
  • the examples show a residual strength of 80% or more with respect to bending fatigue after 2 million reciprocations, and it can be confirmed that a sufficient strength is maintained.
  • tooth loss occurs in the aramid fiber core wire, and the polyester fiber core wire is cut, and the test is not achieved 2 million times. Even a glass fiber core wire was cut less than 70,000 times with a diameter of 0.18 mm.
  • FIG. 5 is a graphical representation of the residual strength retention after 2 million cycles.
  • FIG. 5 shows the residual strength retention after the 2 million-times test. When the glass fiber has a diameter of 0.3 mm or more, the residual strength rapidly decreases to 70% or less.
  • ⁇ D Dimensional stability test> The belt was tested for dimensional stability, focusing on the type of core wire.
  • As the target core wire a glass fiber core wire, an aramid fiber core wire, or a polyeltel fiber core wire was used. As shown in FIG. 7, the belt was wound around two pulleys, and the dimensional change when a load was applied was measured. About the thickness of the fiber which comprises a core wire, it is as having described in Table 1 and Table 2. 1. Test conditions ⁇ Leaving time in each environment: 24 hours ⁇ Temperature setting under each environment: 20 °C ⁇ Each sample is left free in the environment ⁇ Axis length measurement within 2 minutes under each environment ⁇ Axis length measurement conditions 2.
  • the glass fiber core wire is in the range of 0.012 to -0.006%, whereas the aramid fiber core wire is 0.03 to 0.11% in size due to changes in the humidity environment. It was measured to change. It was confirmed that the glass fiber core wire has high humidity resistance stability.
  • Table 1 and Table 2 the test which changed the thickness of the fiber which comprises a core wire is also performed. As for the thickness of the fiber constituting the core wire, it is shown that the durability is inferior at 5 microns used in Comparative Example 5, and the bending resistance is lowered at 10 microns used in Comparative Example 6, so the fiber thickness It was confirmed that 6 to 9 microns was suitable.
  • the glass fiber core wire is in the range of 0.002 to -0.023%, whereas the polyester fiber core wire is -0.019 to -0.093% depending on the change of temperature environment. It was measured that the dimensions changed. It was confirmed that the glass fiber core wire has high temperature resistance stability.
  • a glass fiber core wire is suitable as the core wire material.
  • the glass fiber core wire has high dimensional stability against humidity change and temperature change.
  • a suitable thickness is necessary to ensure moderate durability.
  • the diameter was 0.18 mm, cutting was performed, and when the diameter was 0.32 mm, it was confirmed that the fatigue durability was greatly reduced (see Table 5).
  • the rigidity of the glass fiber cannot be applied to the small-diameter pulley of the present invention.
  • the thickness of the fiber constituting the core wire As for the thickness of the fiber constituting the core wire, it is shown that the durability is inferior at 5 microns used in Comparative Example 5, and the bending resistance is lowered at 10 microns used in Comparative Example 6, so the fiber thickness It was confirmed that 6 to 9 microns was suitable. Therefore, a glass fiber core wire is suitable for a urethane toothed belt having a tooth pitch of 0.65 to 0.85 mm, and the diameter of the wire is 0.20 to 0.28 mm. A diameter of 6 to 9 microns is suitable. 2. It was confirmed that the residual strength of 80% or more after the 2 million times bending durability test was exhibited. 3. The wear resistance can be sufficiently maintained by adding 0.5 to 1.5% by weight of carbon.
  • the conductive carbon also contributes to the improvement of wear resistance. 4). It was confirmed that sufficient conductivity can be obtained by adding 0.5 to 1.5% by weight of conductive carbon. In particular, in the belt of this example added with 1.5% by weight, since it was confirmed that the belt molding and durability were good, it was confirmed that there was no adverse effect on molding such as agglomeration and chipping. did it. 5. It is confirmed that the belt configuration of the present invention can provide a toothed belt that can be used with a diameter smaller than a pulley pitch diameter of ⁇ 6.468 mm (pitch: 1.016 mm, number of teeth: 20), has a small speed fluctuation, and is durable. did.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

L'invention concerne une courroie dentée comportant des armatures qui sont composées de cordes de verre, et dont le pas de dents va de 0,65 à 0,85 mm. Le diamètre de chaque armature va de 0,20 à 0,28 mm, et le diamètre de chaque fibre constituant l'armature va de 6 à 9 microns. La courroie dentée est particulièrement adaptée aux poulies de petit diamètre.
PCT/JP2010/068459 2009-12-24 2010-10-20 Courroie dentée WO2011077817A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-292530 2009-12-24
JP2009292530A JP5416573B2 (ja) 2009-12-24 2009-12-24 歯付ベルト

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WO2011077817A1 true WO2011077817A1 (fr) 2011-06-30

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PCT/JP2010/068459 WO2011077817A1 (fr) 2009-12-24 2010-10-20 Courroie dentée

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WO (1) WO2011077817A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170108079A1 (en) * 2014-03-31 2017-04-20 Mitsuboshi Belting Ltd. Toothed Belt
JP2018530485A (ja) * 2015-10-08 2018-10-18 バンドール・プロダクシー・ベー・フェーＢａｎｄａｌｌ Ｐｒｏｄｕｃｔｉｅ Ｂ．Ｖ． 製品結束用装置
JP2018530486A (ja) * 2015-10-08 2018-10-18 バンドール・プロダクシー・ベー・フェーＢａｎｄａｌｌ Ｐｒｏｄｕｃｔｉｅ Ｂ．Ｖ． 製品結束用装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6379669B2 (ja) * 2014-05-22 2018-08-29 株式会社ジェイテクト 電動パワーステアリング装置
US10786854B2 (en) * 2015-03-12 2020-09-29 Robert Bosch Tool Corporation Table saw with electrically isolated arbor shaft
JP6530276B2 (ja) * 2015-08-20 2019-06-12 三ツ星ベルト株式会社 ベルトシステムおよびその歯付きベルト

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02173434A (ja) * 1988-12-24 1990-07-04 Bando Chem Ind Ltd 熱可塑性エラストマー伝動ベルト
JP2005042737A (ja) * 2003-05-27 2005-02-17 Mitsuboshi Belting Ltd 歯付ベルト
JP2006009845A (ja) * 2004-06-23 2006-01-12 Mitsuboshi Belting Ltd ウレタンベルト
JP2006068932A (ja) * 2004-08-31 2006-03-16 Mitsuboshi Belting Ltd 熱可塑性エラストマー製歯付ベルトの製造方法。

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02173434A (ja) * 1988-12-24 1990-07-04 Bando Chem Ind Ltd 熱可塑性エラストマー伝動ベルト
JP2005042737A (ja) * 2003-05-27 2005-02-17 Mitsuboshi Belting Ltd 歯付ベルト
JP2006009845A (ja) * 2004-06-23 2006-01-12 Mitsuboshi Belting Ltd ウレタンベルト
JP2006068932A (ja) * 2004-08-31 2006-03-16 Mitsuboshi Belting Ltd 熱可塑性エラストマー製歯付ベルトの製造方法。

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170108079A1 (en) * 2014-03-31 2017-04-20 Mitsuboshi Belting Ltd. Toothed Belt
JP2018530485A (ja) * 2015-10-08 2018-10-18 バンドール・プロダクシー・ベー・フェーＢａｎｄａｌｌ Ｐｒｏｄｕｃｔｉｅ Ｂ．Ｖ． 製品結束用装置
JP2018530486A (ja) * 2015-10-08 2018-10-18 バンドール・プロダクシー・ベー・フェーＢａｎｄａｌｌ Ｐｒｏｄｕｃｔｉｅ Ｂ．Ｖ． 製品結束用装置

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JP5416573B2 (ja) 2014-02-12
JP2011133022A (ja) 2011-07-07

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