JPS6320985Y2

JPS6320985Y2 -

Info

Publication number: JPS6320985Y2
Application number: JP1982173116U
Authority: JP
Priority date: 1982-11-16
Filing date: 1982-11-16
Publication date: 1988-06-10
Also published as: JPS5977138U

Description

【考案の詳細な説明】（産業上の利用分野）本考案は、原図紙および感光紙を重合密着させ
露光焼付を行う複写機の搬送装置に関する。[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a conveying device for a copying machine that brings an original paper and a photosensitive paper into close contact with each other in a polymerized manner and performs exposure printing.

（従来の技術）一般に、複写機において、原図紙および感光紙
を搬送し、露光透過焼付ドラムに圧着させるため
に、ゴム、布等の軟質材料からなる複数本の環状
搬送ベルトが使用される。この搬送ベルトを回転
駆動するために駆動ロールが設けられ、搬送ベル
トのそれぞれに張力を与えながら回転する複数個
の補助ロールが設けられる。それぞれの搬送ベル
トに常に所要の張力を付与するために、少なくと
も１本または数本の補助ロールにばねを装着す
る。(Prior Art) Generally, in a copying machine, a plurality of annular conveyor belts made of a soft material such as rubber or cloth are used to convey original paper and photosensitive paper and press them against an exposure/transmission printing drum. A drive roll is provided to rotate the conveyor belt, and a plurality of auxiliary rolls are provided that rotate while applying tension to each conveyor belt. At least one or several auxiliary rolls are fitted with springs in order to always apply the required tension to the respective conveyor belt.

このばねにより、所定の張力を搬送ベルトに付
与している。 This spring applies a predetermined tension to the conveyor belt.

（考案が解決しようとする問題点）しかし、搬送ベルトは、周囲長さを全く等しく
製作することは困難で、それぞれの仕上り寸法に
バラツキがある。また、長期間の使用により、そ
れぞれ異なる延びを生じ、全周長さの相違等を生
じる。すなわち、上述のばねの使用にもかかわら
ず、それぞれの搬送ベルトの張力を十分に、均一
化することは困難で、最も全周長さが短かい搬送
ベルトには有効な緊張が付与されても、さらに長
い搬送ベルトにはその効果が減少する。従つて、
これらの搬送ベルトによる原図紙および感光紙の
搬送力が著しく低下する。(Problems to be Solved by the Invention) However, it is difficult to manufacture conveyor belts with exactly the same circumferential length, and the finished dimensions of each conveyor belt vary. In addition, due to long-term use, they each elongate differently, resulting in differences in overall circumferential length, etc. In other words, despite the use of the above-mentioned springs, it is difficult to make the tension of each conveyor belt sufficiently uniform, and even if effective tension is applied to the conveyor belt with the shortest overall length, , its effectiveness decreases for longer conveyor belts. Therefore,
The conveying force of the original paper and the photosensitive paper by these conveyor belts is significantly reduced.

本考案は、上述の点に鑑み、従来技術の問題点
を除きそれぞれの搬送ベルトに所要の緊張が均一
的に付与され、搬送ベルトの搬送力の安定性が向
上し、しかもその構成が簡易化する複写機の搬送
装置を提供することを目的とする。 In view of the above-mentioned points, the present invention eliminates the problems of the conventional technology, applies the required tension uniformly to each conveyor belt, improves the stability of the conveying force of the conveyor belt, and simplifies its configuration. The object of the present invention is to provide a conveying device for a copying machine.

（問題点を解決するための手段）このような目的は本考案によれば、複数個の円
筒状回転体を搬送ベルトに設け、この円筒状回転
体をそれぞれ前記搬送ベルトの表面に押当てて回
転させる回転体押当手段を、前記円筒状回転体の
軸線方向に設けられた中空孔を貫通し前記中空孔
の内径より外径を小さくして前記円筒状回転体の
有する自重により前記円筒状回転体を前記搬送ベ
ルトの表面に押当て所要の緊張を付与する回転体
支持軸にて構成することにより達成される。(Means for Solving the Problems) According to the present invention, this object is achieved by providing a plurality of cylindrical rotating bodies on a conveyor belt, and pressing each of the cylindrical rotating bodies against the surface of the conveyor belt. A rotary body pressing means for rotating is passed through a hollow hole provided in the axial direction of the cylindrical rotary body and has an outer diameter smaller than the inner diameter of the hollow hole, so that the self weight of the cylindrical rotary body pushes the cylindrical body. This is achieved by configuring the rotating body with a rotating body support shaft that presses against the surface of the conveyor belt and applies the required tension.

（実施例）次に、本考案の一実施例を図面に基づき、詳細
に説明する。(Example) Next, an example of the present invention will be described in detail based on the drawings.

第１図は本考案が適用された複写機の概略構成
図を示す。図において複写機は原図紙Ａおよび感
光紙Ｂを挿入する原図紙・感光紙案内板１２と、
露光焼付部Ｃを有する。この露光焼付部Ｃは露光
透過焼付ドラム３および搬送装置１３からなる。
露光透過焼付ドラム３は露光ランプ１および反射
板２を内蔵する。また、搬送装置１３は、搬送ベ
ルト４と、駆動ロール５と補助ロール６，７と、
円筒状回転体および回転体押当手段、本実施例で
はウエイトコロ１０およびコロ支持軸９とからな
る。複数個の搬送ベルト４は、駆動ロール５およ
び補助ロール６，７の間に懸張される。駆動ロー
ル５は複写機の駆動系（図示しない）より動力の
伝達を受け、搬送ベルト４を摩擦力により回動す
る。この搬送ベルト４の回動により、露光透過焼
付ドラム３、補助ロール６，７およびウエイトコ
ロ１０は摩擦回転をする。なお、コイルばね８は
搬送ベルト４に張力を付与するために、補助ロー
ル７の回転軸１４と、複写機の本体（図示しな
い）との間に懸架される。さらに、ウエイトコロ
１０は大口径の中空孔１５を有する中空円筒状に
形成され、この中空孔１５の口径より外径が小さ
いコロ支持軸９が挿入される。従つて、補助ロー
ル７に設けられたコイルばね８が、搬送ベルト４
に張力を与えると共に、ウエイトコロ１０の有す
る自重はウエイトコロ１０をそれぞれの搬送ベル
ト４の表面に押当てて、搬送ベルト４に所要の張
力を付与する。すなわち、ウエイトコロ１０はコ
イルばね８による搬送ベルト４の緊張度に対し
て、補助的な所要の緊張度を付与して、その搬送
力の安定性を向上させる。 FIG. 1 shows a schematic diagram of a copying machine to which the present invention is applied. In the figure, the copying machine includes an original paper/photosensitive paper guide plate 12 into which original paper A and photosensitive paper B are inserted;
It has an exposure and printing section C. This exposure/printing section C consists of an exposure/transmission/printing drum 3 and a conveyance device 13.
The exposure/transmission printing drum 3 has an exposure lamp 1 and a reflection plate 2 built therein. Further, the conveying device 13 includes a conveying belt 4, a drive roll 5, auxiliary rolls 6 and 7,
It consists of a cylindrical rotating body and a rotating body pressing means, in this embodiment, a weight roller 10 and a roller support shaft 9. A plurality of conveyor belts 4 are suspended between a drive roll 5 and auxiliary rolls 6,7. The drive roll 5 receives power from a drive system (not shown) of the copying machine, and rotates the conveyor belt 4 by frictional force. This rotation of the conveyor belt 4 causes the exposure/transmission/printing drum 3, the auxiliary rolls 6, 7, and the weight roller 10 to rotate by friction. The coil spring 8 is suspended between the rotating shaft 14 of the auxiliary roll 7 and the main body of the copying machine (not shown) in order to apply tension to the conveyor belt 4. Further, the weight roller 10 is formed into a hollow cylindrical shape having a large-diameter hollow hole 15, into which the roller support shaft 9 having an outer diameter smaller than the diameter of the hollow hole 15 is inserted. Therefore, the coil spring 8 provided on the auxiliary roll 7
At the same time, the weight of the weight roller 10 presses the weight roller 10 against the surface of each conveyor belt 4 to apply a required tension to the conveyor belt 4 . That is, the weight rollers 10 provide a necessary supplementary tension to the tension of the conveyor belt 4 caused by the coil spring 8, thereby improving the stability of the conveying force.

次に、第２図は本考案の一実施例の概略構成図
を示す。図において第１図と同一の機能を有する
部分には、同一の符号が付されている。複数個の
ウエイトコロ１０は挿入されるコロ支持軸９にて
支持され、かつコロ支持軸９に取付けられた止め
輪１１により搬送ベルト４の上面に保持される。
また、ウエイトコロ１０は金属、ゴムまたは合成
樹脂製等で、所要の重量を有する硬質材料からな
る。なお、１６はウエイトコロ１０の中空孔１５
に嵌入され、コロ支持軸９に対する軸受部材であ
る。このコロ支持軸９の外径ｄは、中空孔１５の
口径Ｄより、はるかに小さい。従つて、ウエイト
コロ１０は中空孔１５の口径Ｄと支持軸９の外径
ｄとの差Ｄ−ｄの上下移動範囲を有する。この上
下移動範囲Ｄ−ｄ内で、ウエイトコロ１０は、そ
れぞれの搬送ベルト４の周囲長さ誤差、すなわ
ち、たわみに追従して常に搬送ベルト４の上面に
自重により押当て、所要の張力を付与しながら、
搬送ベルト４との摩擦により回転する。このよう
に、コイルばね８により補助ロール７を介して、
複数本の搬送ベルト４に与える緊張に対して、補
助的な緊張状態を自動的で、独立的にそれぞれ付
与することができる。 Next, FIG. 2 shows a schematic diagram of an embodiment of the present invention. In the figure, parts having the same functions as those in FIG. 1 are given the same reference numerals. The plurality of weight rollers 10 are supported by inserted roller support shafts 9, and are held on the upper surface of the conveyor belt 4 by retaining rings 11 attached to the roller support shafts 9.
Further, the weight roller 10 is made of a hard material having a required weight, such as metal, rubber, or synthetic resin. In addition, 16 is a hollow hole 15 of the weight roller 10.
This is a bearing member for the roller support shaft 9. The outer diameter d of this roller support shaft 9 is much smaller than the diameter D of the hollow hole 15. Therefore, the weight roller 10 has a vertical movement range of the difference D-d between the diameter D of the hollow hole 15 and the outer diameter d of the support shaft 9. Within this vertical movement range D-d, the weight roller 10 follows the circumferential length error, that is, the deflection, of each conveyor belt 4 and always presses it against the upper surface of the conveyor belt 4 with its own weight to apply the required tension. while doing,
It rotates due to friction with the conveyor belt 4. In this way, via the auxiliary roll 7 by the coil spring 8,
A supplementary tension state can be automatically and independently applied to the tension applied to the plurality of conveyor belts 4.

（考案の効果）以上に説明するように本考案によれば、複数個
の回転体と、この回転体をそれぞれの搬送ベルト
の表面に押当てて回転させながら、それぞれの前
記搬送ベルトに所要の緊張を付与する複数個の回
転体押当手段とを設けることにより、それぞれの
搬送ベルトの全周長さの相違より生じる緊張度の
相違が除かれて、所要の緊張が均一的に付与さ
れ、搬送ベルトの搬送力の安定性が向上し、しか
もその構成が簡易化するという効果を有する。(Effects of the invention) As explained above, according to the invention, a plurality of rotating bodies are pressed against the surface of each conveyor belt and rotated, and the required amount is applied to each of the conveyor belts. By providing a plurality of rotating body pressing means for applying tension, the difference in the degree of tension caused by the difference in the total circumferential length of each conveyor belt is eliminated, and the required tension is applied uniformly. This has the effect of improving the stability of the conveying force of the conveying belt and simplifying its configuration.

[Brief explanation of the drawing]

第１図は本考案が適用された複写機の概略構成
図、第２図は本考案の一実施例の概略構成図であ
る。４：搬送ベルト、５：駆動ロール、６，７：補
助ロール、８：コイルばね、９：支持軸、１０：
ウエイトコロ、１１：止め輪、１５：中空孔。 FIG. 1 is a schematic diagram of a copying machine to which the present invention is applied, and FIG. 2 is a schematic diagram of an embodiment of the present invention. 4: Conveyor belt, 5: Drive roll, 6, 7: Auxiliary roll, 8: Coil spring, 9: Support shaft, 10:
Weight roller, 11: Retaining ring, 15: Hollow hole.

Claims

[Scope of utility model registration request]

In a copying machine that has a plurality of conveyor belts that are suspended between a drive roller and an auxiliary roller and convey original paper and photosensitive paper in close contact with each other, and are pressed against an exposure and transmission printing drum, a plurality of cylindrical rotating bodies are used. are provided on the conveyor belt, and rotating body pressing means for pressing and rotating the cylindrical rotary bodies against the surface of the belt respectively penetrates a hollow hole provided in the axial direction of the cylindrical rotary body and rotates the cylindrical rotary body. It is characterized by comprising a rotating body support shaft whose outer diameter is smaller than the inner diameter of the hole and which presses the cylindrical rotating body against the surface of the conveyor belt by its own weight to apply the required tension. A conveying device for a copying machine.