JPS58109339A - Belt conveyor - Google Patents

Abstract

PURPOSE:To promote the accuracy of conveyance by a sheet conveyor for a copier or the like and prevent oblique movement, by providing a circumferential recess on the central part of a barrel-shaped roller and fitting the roller with a belt whose suction openings are located on the recess. CONSTITUTION:The maximum-diameter peripheral surfaces of a driving and a driven rollers 103, 104a, 104b shaped as a barrel are knurled at 109a, 109b. A recess is provided between the knurled portions 109a, 109b. An endless belt 101 is put in pressure contact with the rollers 103, 104a, 104b so that the suction openings 102 of the belt are located between the knurled portions 109a, 109b. Since the openings 102 are hardly affected by the tension of the belt 101, the openings are protected from deformation. Since the elongation of the belt 101 is small, its elasticity can be reduced. As a result, a sheet is accurately conveyed and is kept from obliquely moving.

Description

【発明の詳細な説明】 本発明はベルト搬送装置に関する。[Detailed description of the invention] The present invention relates to a belt conveying device.

一般に、ベルトを駆動コロ等に掛けることＫよするベル
ト搬送装置は、例えば複写機のような画像形成機にも随
所に使用されている。Generally, belt conveying devices in which a belt is hung around a drive roller or the like are widely used in image forming machines such as copying machines.

そして、複写機においてコピー紙のようなシートに原稿
の画像を形成した後、その画像を乱すことなく定着部迄
搬送しなければならないという機能が求められる部位で
は、従来は、第１図に示すような無端ベルト１の中心上
に等間隔に開口部２を形成し、この上にシートＳを吸引
手段１５によシ吸引吸着して搬送する装置が使用されて
いた。In a copying machine, a function is required to form a document image on a sheet such as copy paper and then transport the image to a fixing section without disturbing it, as shown in Figure 1. A device has been used in which openings 2 are formed at regular intervals on the center of such an endless belt 1, and the sheet S is suctioned thereon by suction means 15 and conveyed.

ところで上記ベルト１は、シート搬送タイミングや斜行
を防ぐためにも一定以上の張力で保持されなければなら
ないという要求があり、そこで、無端ベル）１を駆動す
る駆動コロ３、および従動コロ４ｍ、４ｂは、第２図に
示すような胴部の外径が両端の外径よル大きな中高とし
た太鼓形コロを用い、これＫよＪ）−、ｔル）４０寄シ
やはづれを防ぐように構成し、また、従動コ０４ｂの軸
にバネ等で付勢力を与えて上記ベルト１の張力を常Ｋ　
−足取上に保ち、駆動コロ３とベルト１との動力の伝達
を確実にしているのが普通である。特に１駆動コロ３の
最大外径外周面９Ｋａローレ、ト加工を施し、上記張力
に加えて駆動コロ３とベルト１との摩擦を大きくしてい
ること吃多い。By the way, there is a requirement that the belt 1 must be held with a tension above a certain level in order to prevent sheet conveyance timing and skew, and therefore, the driving roller 3 that drives the endless belt 1 and the driven rollers 4m and 4b are used. As shown in Fig. 2, a drum-shaped roller with a medium-height body whose outer diameter is larger than the outer diameter of both ends is used, and this roller is designed to prevent coming together or coming off. In addition, the tension of the belt 1 is kept constant by applying a biasing force to the shaft of the driven motor 04b using a spring or the like.
- It is normal to maintain the same footing to ensure power transmission between the drive roller 3 and the belt 1. In particular, the outer peripheral surface of the maximum outer diameter of the first driving roller 3 is processed with a 9Ka roll to increase the friction between the driving roller 3 and the belt 1 in addition to the above-mentioned tension.

しかるに１太鼓形プロでは、第３図に示すようにその最
大外径外周面９＃／ｃ接するベルトの中心帯１４（最大
外径外周面とベルトの接触部からそのベルト搬送方向へ
伸びた帯状域）の付近に常に大きな張力が働くために、
第４図のように丸穴が長穴に変形し、その穴の周辺にも
集中的な引張力が働き亀裂を生じてベルト全体が伸びて
しまう問題を生ずることがあった。仁の場合ベルト１の
伸びによる従動コロ４ｂの変位がバネ６の付勢力を弱め
ることにな〕、駆動コ０３とベル）１との摩擦力を著し
く低下させて、滑シをもたらし、その結果、上記シート
の搬送装置ではシートを正常なタイ２ングで確実に搬送
する仁とができず、また斜行搬送する勢の欠点を招致す
ることがあったのである。However, in the case of the 1-taiko-shaped professional belt, as shown in Fig. 3, the center zone 14 of the belt that is in contact with the maximum outer diameter outer circumferential surface 9#/c (the belt-shaped belt extending from the contact area between the maximum outer diameter outer circumferential surface and the belt in the belt conveyance direction) Because there is always a large tension near the
As shown in FIG. 4, a round hole deforms into an elongated hole, and a concentrated tensile force acts on the periphery of the hole, causing cracks and causing the entire belt to stretch. In the case of a belt 1, the displacement of the driven roller 4b due to the elongation of the belt 1 weakens the biasing force of the spring 6], which significantly reduces the frictional force between the driving roller 03 and the bell) 1, causing slippage. However, the above-mentioned sheet conveying device cannot reliably convey the sheet with normal tying, and may also have the disadvantage of being obliquely conveyed.

本発明の目的は上記従来技術の欠点を解消するベルト搬
送装置を提供するものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a belt conveying device that overcomes the drawbacks of the prior art described above.

１、。1.

本発Ｗ１４Ｆｉ、ペルＦと、そのベルトを掛けるローラ
を有するベルト搬送装置に於いて、上記ベルトが東回す
る上記ローラの最大外径外周部に対応して生じる上記ベ
ルトの高張力領域から偏倚した開口部を有することを４
Ｉ像とするものであシ、異体的ＩＩｃＦｉ、本発明の要
旨は、回動方向Ｋａって多数Ｏ開口が離隔形成されてい
るベルトを、複数個Ｏプロに架設してなるベルト搬送装
置にシいて、前記コロは、中高形状をなし、かつその中
高の中央部に周状の凹設部を備えるように設けると共に
、このコロに掛は回わされる前記ベルトの開口は、骸コ
ロの凹設部開放口上に位置するよう構成し、たことを特
徴とするベルト搬送装置に・ある。In a belt conveying device having a W14Fi, Pel F, and a roller on which the belt is hung, the belt deviates from the high tension region of the belt, which occurs in correspondence with the maximum outer diameter of the roller to which the belt rotates eastward. 4 having an opening
The gist of the present invention is to provide a belt conveying device in which a plurality of belts each having a plurality of O openings formed at a distance in the rotating direction Ka are installed over a plurality of O rollers. The roller has a shape with a center height, and is provided with a circumferential recessed part in the center of the center height, and the opening of the belt that is wound around the roller is the same as that of the skeleton roller. A belt conveying device is characterized in that it is configured to be located above an opening of a recessed portion.

以下本発明を図面に示す一実施例に基づいて説明するが
、前記第１図〜第４図に示した従来構造のベルト搬送装
置の各部に対応する部材に＃ｉ、符号Ｖｃ１００を加え
て示している。The present invention will be described below based on an embodiment shown in the drawings. The members corresponding to the respective parts of the conventional belt conveying device shown in FIGS. 1 to 4 are designated by #i and Vc100. ing.

本例の特徴は、第５図に示す如く、太鼓形コーの最大外
径外周面である四−レフト加工処理面１０９ｍ、１０９
ｂ忙対し、これに強く接触する無端ベルト１０１上の前
記四−レ、ト加工ｍｍ１１１１０９ｍ、１０９ｂにはさ
まれ大領域１０１ａ部に吸引用の開口部１０２が設け♂
背ことＫある。The characteristics of this example are as shown in FIG.
In contrast, a suction opening 102 is provided in a large area 101a sandwiched between the four grooves 111109m and 109b on the endless belt 101 that strongly contacts the endless belt 101.
There is a back called K.

このような構成によれば、上記開口部＃ｃ＃ｉベルトに
作用する張力（図の矢印で示す方向）＃１とんど働らか
ず、ゆえｋそＯ変形による伸びもわずかであり、ベルト
の伸びも極めて小さいので弾性の大きいベルトも使用で
きるととになる。According to such a configuration, the tension #1 (in the direction indicated by the arrow in the figure) acting on the belt at the opening #c#i hardly acts, and therefore the elongation due to deformation is slight, and the belt Since the elongation is extremely small, belts with high elasticity can also be used.

第６図は本発明の応用例を示すシートのベルト搬送装置
の斜視図である。第６図に於いて、がムを混入した繊維
状のベルトが太鼓状の駆動コロ１０３と従動！ｏ１０４
ｍ、１０４ｂを介し無端ベル）１０１を成している。無
端ペル）ＩＯＩＫはその中央部に菖５図に示した如く長
穴１１０が一定の開隔で形成されている。また従動コロ
１０４ｂＦｉその軸１０５が遊動するように支持され、
バネ１０６によシ付勢され無端ベルト１０１に一定以上
の張力を与えている。FIG. 6 is a perspective view of a sheet belt conveying device showing an application example of the present invention. In FIG. 6, a fibrous belt mixed with rubber is driven by a drum-shaped driving roller 103! o104
m and 104b to form an endless bell) 101. The IOIK (Endless Pel) has elongated holes 110 formed at regular intervals in its center as shown in Fig. 5. Further, the driven roller 104bFi is supported so that its shaft 105 can freely move,
The endless belt 101 is biased by a spring 106 to apply a tension above a certain level to the endless belt 101.

シート搬送部である駆動コロ１０３と従動コロ１０４１
間の無端ベルトの下部ＫＦｉ、吸引用の開口１１２を有
するガイド板１１３が固設されている。ガイド板１１３
によ〕シート社告無端ベルト間でたわんだシすることな
く平面的に搬送される。Driving roller 103 and driven roller 1041, which are sheet conveyance units
A guide plate 113 having a suction opening 112 is fixed to the lower part KFi of the endless belt in between. Guide plate 113
The sheet is conveyed flatly between the endless belts without bending.

また上記吸引開口１１２Ｆｉ、シート搬送部では上記無
端ベルト１０１の長穴１１０に対面するが、別途設けら
れた吸引手段１１５により上記長穴１１０・・・・・を
介して無端ベルト１０１上にシートを吸引吸着して搬送
するためのものである。In addition, the suction opening 112Fi faces the elongated hole 110 of the endless belt 101 in the sheet conveyance section, and a separately provided suction means 115 draws the sheet onto the endless belt 101 through the elongated hole 110. This is for suctioning and transporting.

すなわち、上記応用例では太鼓形コロの最大外径部に対
応する位動に、ベルトの開口部が位置していないので、
ベルトの張力が開口部に強く作用することがなく、その
変形も僅かである。したがって無端ベルトの全伸び量も
極めて少なく、従動コロに作用させていた当初のバネ付
勢力もほとんど変わることのない付勢力を保つことがで
きるので無端ベルトと駆動コロとの滑シを防ぐことがで
き、長期にわたってシートを確実に１そしてタイミング
よく搬送することができることは勿論、上記付勢／４ネ
はその弾性領域をそれ程大きな亀のにする必要がないと
いう効果が得られるのである。In other words, in the above application example, the opening of the belt is not located at a position corresponding to the maximum outer diameter of the drum-shaped roller.
The tension of the belt does not strongly act on the opening, and its deformation is slight. Therefore, the total amount of elongation of the endless belt is extremely small, and the original spring biasing force acting on the driven roller can be maintained at an almost unchanged biasing force, making it possible to prevent slippage between the endless belt and the driving roller. Not only can the sheet be conveyed reliably and in a timely manner over a long period of time, but also the above-mentioned biasing has the effect that it is not necessary to make the elastic region so large.

尚、第７図は本発明の他の実施例に係るベルト搬送装置
に用いるコロの平面図であシ、太鼓形コロに和尚する部
材は、ローレット加工処理面１０９’、１０９’を含み
、外側テーノ量一部を有する一対のコロを、軸に対して
軸方に離隔して固着してなるものである。In addition, FIG. 7 is a plan view of a roller used in a belt conveying device according to another embodiment of the present invention. A pair of rollers having a certain amount of pressure are fixed to the shaft while being separated from each other in the axial direction.

このような構成によりても、中高コｐの最大径部分忙凹
所を形成したものとしては実質的に同一であり、前記実
施例と同様の効果を得ることができる。Even with such a configuration, it is substantially the same as that in which the maximum diameter portion of the medium-high cup is formed, and the same effects as in the above embodiment can be obtained.

また以上各実施例では太鼓形コロについての場合のみ説
明した。しかしこれは必ずしも太鼓形コロに限定される
ものではなく、ベル）Ｋ対応する外周域ＫＩＡ径差があ
るようなコロ、所謂完全な円筒形コロ以外のコロを用い
るベルト搬送装置に適用し得るものであるし、またロー
レット加工の面もこれに限定する趣旨ではなく、要する
にベルトとの間で滑〕のない接触状態が得られればよい
のある。Furthermore, in each of the above embodiments, only the drum-shaped rollers have been described. However, this is not necessarily limited to drum-shaped rollers, and can be applied to belt conveying devices that use rollers other than so-called perfect cylindrical rollers, such as rollers that have a diameter difference in the outer peripheral area KIA corresponding to K (bell) K. Furthermore, the knurling surface is not limited to this, and it is sufficient that a smooth contact state with the belt can be obtained.

本発明によればベルトが東回するローラの最大外径外周
部に対応して生じる上鮎ベルトの高張力領域から偏倚し
て開口部を有するので、ベルトの開口部に引張力が働か
ずその変形を防ぎベルトの伸びをなくすことができ、そ
の有用性は大なるものである。According to the present invention, since the belt has an opening that is offset from the high tension area of the Uayu belt that corresponds to the maximum outer diameter of the roller that rotates eastward, no tensile force is applied to the opening of the belt. It is extremely useful as it can prevent deformation and eliminate belt elongation.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来のベルト搬送装置の斜視図、第２図は太鼓
形コロの斜視間、第３図は従来ベルト搬送装置のベルト
東回状態の断面図、第４図はベルトの丸穴開口部の変形
状態を表わす平面図、第５図は本発明の実施例を示す平
面図、第６図は本発明の応用例を示すシートのベルト搬
送装置の斜視図、第７図は本発明の他の実施例に係るベ
ルト係合部の平面図である。 １　、１０１　：無端ベルト ２：開口部　　　　　　３＊１０３：駆動コロ４ａｅ４
ｂｅｉ０４ａｅ１０４ｂ：従動コロ５　ａ　１０５　：
軸　　　　６，１０６：バネ７．１０７：軸　　　８，
１０８：軸 ９．１０９：ローレット加工処理面 １１０：長穴　　　゛ １２　Ｊ　１１１２　：吸引開口　　　−１３，１１３
ニガイド板 １５．１１５：吸引手段 弔１図 吊２図Figure 1 is a perspective view of a conventional belt conveyor, Figure 2 is a perspective view of the drum-shaped rollers, Figure 3 is a cross-sectional view of the conventional belt conveyor in the belt eastward state, and Figure 4 is a round hole opening in the belt. 5 is a plan view showing an embodiment of the present invention, FIG. 6 is a perspective view of a sheet belt conveying device showing an application example of the present invention, and FIG. 7 is a plan view showing an embodiment of the present invention. FIG. 7 is a plan view of a belt engaging portion according to another embodiment. 1, 101: Endless belt 2: Opening 3*103: Drive roller 4ae4
bei04ae104b: Driven roller 5 a 105:
Shaft 6, 106: Spring 7.107: Shaft 8,
108: Axis 9.109: Knurled surface 110: Long hole ゛12 J 1112: Suction opening -13,113
Ni guide plate 15.115: Suction means funeral 1 figure hanging 2 figures

Claims (1)

【特許請求の範囲】[Claims] 回動力向に沿りて多数の開口が離隔形成されているベル
トを、複数個のコロに架設してなるベルト搬送装置にお
いて、前記コロは、中高形状をなし、かつその中高の中
央部に周状の凹設部を備えるように設けると共に、この
コロに掛は回わされる前記ベルトの開口は、該コＶＳＯ
凹設部開放ロ上搬送装置。In a belt conveying device in which a belt in which a large number of openings are formed spaced apart along the direction of rotation is installed over a plurality of rollers, the rollers have a shape with a center height, and the center portion of the center height of the roller has a circumference. The opening of the belt, which is provided with a recessed part of the shape of
Concave part open upper transfer device.