JPH0644701Y2 - Paper feeder - Google Patents
Paper feederInfo
- Publication number
- JPH0644701Y2 JPH0644701Y2 JP1986188158U JP18815886U JPH0644701Y2 JP H0644701 Y2 JPH0644701 Y2 JP H0644701Y2 JP 1986188158 U JP1986188158 U JP 1986188158U JP 18815886 U JP18815886 U JP 18815886U JP H0644701 Y2 JPH0644701 Y2 JP H0644701Y2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- drive pulley
- feed
- feed belt
- teeth
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Landscapes
- Handling Of Sheets (AREA)
- Advancing Webs (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は各種のプリンタやコンピュータ等に用紙（連
続用紙）を給紙するための紙送り装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a paper feeding device for feeding paper (continuous paper) to various printers, computers and the like.
従来、この種の紙送り装置には、例えば実開昭60-94960
号公報、実開昭59-164744号公報に開示されたものがあ
る。Conventionally, this type of paper feeding device has been disclosed in, for example, Shoukai 60-94960.
Japanese Patent Publication No. 59-164744 and Japanese Utility Model Publication No. 59-164744.
また、このような紙送り装置においては、一対の側フレ
ームの間に配設された駆動プーリとベルトガイドとの間
に無端状の送りベルトが掛装される。Further, in such a paper feeding device, an endless feed belt is looped between a drive pulley and a belt guide arranged between a pair of side frames.
そして、前記送りベルトの外周の送りピンが用紙の送り
孔と噛合している状態において、前記駆動プーリの外周
の外歯が駆動プーリの外周に沿つて円弧状に走行する送
りベルトの部分（駆動側円弧状走行部）の内歯と噛合つ
て回転することで、送りベルトを所定方向へ駆動し、前
記用紙を移送するようになつている。Then, in a state where the feed pin on the outer circumference of the feed belt is meshed with the feed hole of the sheet, the outer teeth of the outer circumference of the drive pulley run along the outer circumference of the drive pulley in an arc shape (drive belt portion). The feed belt is driven in a predetermined direction by meshing with the inner teeth of the side arcuate traveling portion) to rotate, and the sheet is transported.
ところが、上記した従来のものにおいては、送りベルト
の駆動側円弧状走行部の内歯と、駆動プーリの外歯との
噛合力よりも大きい外力が用紙に負荷されると、駆動プ
ーリに対し送りベルトの駆動側円弧状走行部が浮上がつ
て滑りやベルトジヤンピング等の不具合が発生する。However, in the above-mentioned conventional type, when an external force larger than the meshing force between the inner teeth of the driving-side arcuate running portion of the feed belt and the outer teeth of the drive pulley is applied to the paper, the paper is fed to the drive pulley. The arcuate running portion of the driving side of the belt floats, causing problems such as slippage and belt jumping.
本考案は、一対の側フレームを対向せしめて備えたフレ
ームと、該フレームの一端部寄りに前記一対の側フレー
ム間に配設されてこれら側フレームに回転自在に支承さ
れ、外周縁に外歯が形成された駆動プーリと、該駆動プ
ーリの前記外歯と噛合する内歯が内周面に形成され、外
周面に送りピンが所定ピツチで突設された無端帯状に形
成され、前記一対の側フレーム間において前記内歯が前
記駆動プーリの外歯に噛合する前記駆動プーリの一側外
周面と、前記一対の側フレーム間において前記フレーム
に備えたベルトガイドのガイド面とに沿つて走行せしめ
られる送りベルトとを有する紙送り装置において、前記
送りベルトの駆動プーリの外周面よりの浮上がりを阻止
し、前記駆動ベルトの外歯と送りベルトの内歯の噛合状
態を保持せしめることを目的とするものである。The present invention is directed to a frame provided with a pair of side frames opposed to each other, a pair of side frames disposed between the pair of side frames near one end of the frame, and rotatably supported by the side frames. Is formed on the inner peripheral surface of the drive pulley and the outer teeth of the drive pulley, the feed pin is formed on the outer peripheral surface in the shape of an endless belt protruding with a predetermined pitch. The inner teeth mesh with the outer teeth of the drive pulley between the side frames, and the one side outer peripheral surface of the drive pulley and the guide surface of a belt guide provided on the frame between the pair of side frames. In a paper feeding device having a feed belt, the feed belt is prevented from being lifted from the outer peripheral surface of the drive pulley, and the meshing state of the outer teeth of the drive belt and the inner teeth of the feed belt is held. The door it is an object of the present invention.
そこで本考案においては、前記紙送り装置において、前
記一対の側フレームのうち一方の側フレームに、前記駆
動プーリに噛合して該駆動プーリの一側外周面に沿つて
前記送りベルトが走行せしめられる駆動側円弧状走行路
の外周位置に、内側面を前記駆動側円弧状走行路に沿つ
た円弧面としたベルト規制片を形成し、かつ前記送りベ
ルトをその内歯により前記駆動プーリの外歯に噛合せし
めた状態において、前記送りベルトの送りピンと、前記
ベルト規制片の円弧面との間の間隔を、前記送りベルト
に形成した内歯の前記駆動プーリに形成した外歯に対す
る噛合寸法により小としたことを特徴とするものであ
る。In view of this, in the present invention, in the paper feeding device, one of the pair of side frames is made to run the feed belt along one outer peripheral surface of the drive pulley that meshes with the drive pulley. At the outer peripheral position of the driving side arcuate running path, a belt regulating piece having an inner side surface having an arcuate surface along the driving side arcuate running path is formed, and the feed belt has outer teeth of the driving pulley by its inner teeth. In the state in which the feed belt is engaged with the feed belt, the distance between the feed pin of the feed belt and the arcuate surface of the belt regulating piece is reduced by the meshing dimension of the inner teeth formed on the feed belt with the outer teeth formed on the drive pulley. It is characterized by that.
紙送り装置においては、無端帯状に形成されてその一部
が駆動プーリに噛合され、残余の部分がフレームに備え
たベルトガイドのガイド面に沿わされている送りベルト
は、前記駆動プーリが回転駆動せしめられると、前記送
りベルトの内周面に形成された内歯と前記駆動プーリの
外周縁に形成された外歯との噛合により、その長手方向
に移動せしめられ、その内歯が前記駆動プーリの外歯と
噛合している該駆動プーリの一側外周面に沿う駆動側円
弧状走行路に沿つて走行するとともに、フレームに備え
たベルトガイドのガイド面に沿う走行路をエンドレスに
走行せしめられる。これに伴つて、前記ベルトガイドの
うち直線状に形成されているベルトガイドのガイド面に
沿つて走行せしめられる送りベルトの直線状走行部に突
設されている送りピンが、用紙の側縁部に沿つて前記送
りピンのピツチと同一ピツチで配列されている送り孔に
係合し、前記用紙をプリンタやコンピユータに給紙す
る。In a paper feeding device, a feed belt is formed in an endless belt shape, a part of which is meshed with a drive pulley, and the remaining part is along a guide surface of a belt guide provided on a frame. Then, the inner teeth formed on the inner peripheral surface of the feed belt and the outer teeth formed on the outer peripheral edge of the drive pulley are caused to move in the longitudinal direction, and the inner teeth are moved to the drive pulley. It is possible to travel along a drive-side arcuate travel path along one outer peripheral surface of the drive pulley that meshes with the outer teeth of the drive pulley, and to endlessly travel along a travel path along a guide surface of a belt guide provided on the frame. . Along with this, the feed pin projecting from the linear running portion of the feed belt, which is made to run along the guide surface of the belt guide formed linearly of the belt guide, has a side edge portion of the paper. A feed hole arranged in the same pitch as that of the feed pin is engaged with the feed pin to feed the paper to a printer or a computer.
このとき、前記駆動プーリの外歯と前記送りベルトの内
歯の噛合力より大きい外力が用紙に負荷されると、前記
駆動側円弧状走行部に位置する送りベルトの部分が前記
駆動プーリに対して浮上がる傾向を生ずる。前記駆動側
円弧状走行部においては、送りベルトは該送りベルトに
形成した内歯が駆動プーリに形成した外歯に噛合して、
前記駆動側円弧状走行部に沿つて走行するように駆動さ
れているが、前記送りベルトの浮上がり量が、送りベル
トの内歯の駆動プーリの外歯に対する噛合寸法より大で
あると、前記送りベルトの内歯は駆動プーリの外歯との
噛合から解放され、駆動プーリに対する送りベルトの滑
りが生じて駆動プーリの駆動トルクが送りベルトに伝達
されない状態を生じ、送りベルトの浮上がり量がさらに
大であると、いわゆるベルトジヤンピングと呼ばれる不
具合を生じ、紙送り装置の耐久性を阻害する。At this time, when an external force larger than the meshing force between the outer teeth of the drive pulley and the inner teeth of the feed belt is applied to the sheet, the part of the feed belt located in the driving side arcuate traveling portion is moved relative to the drive pulley. The tendency to rise. In the drive-side arcuate traveling portion, the feed belt has inner teeth formed on the feed belt meshed with outer teeth formed on the drive pulley,
It is driven so as to travel along the drive-side arcuate traveling portion, but if the lift amount of the feed belt is larger than the meshing size of the inner teeth of the feed belt with the outer teeth of the drive pulley, The inner teeth of the feed belt are released from meshing with the outer teeth of the drive pulley, causing the feed belt to slip with respect to the drive pulley, causing the drive torque of the drive pulley to not be transmitted to the feed belt, and the lift amount of the feed belt is increased. If it is larger, a problem called so-called belt jumping occurs, which impairs the durability of the paper feeding device.
本考案においては、前記一対の側フレームのうち一方の
側フレームに、前記駆動側円弧状走行路の外周位置に、
内側面を該駆動側円弧状走行路に沿つた円弧面としたベ
ルト規制片を形成したことにより、前述したように用紙
を給紙する状態において、駆動プーリの外歯と送りベル
トの内歯の噛合力により大なる外力が前記用紙に負荷さ
れて、前記駆動側円弧状走行路に位置する送りベルトの
部分が駆動プーリに対して浮上がる傾向を生じたとき
は、前記送りベルトの外周面に突設された送りピンが前
記ベルト規制片の内側面に形成された円弧面に衝突し
て、それ以上の送りベルトの浮上がりは阻止される。In the present invention, on one side frame of the pair of side frames, at an outer peripheral position of the driving side arcuate traveling path,
By forming the belt regulation piece whose inner side surface is an arc surface along the driving side arcuate traveling path, the outer teeth of the drive pulley and the inner teeth of the feed belt are in contact with each other when the paper is fed as described above. When a large external force is applied to the sheet by the meshing force and the portion of the feed belt located on the driving side arcuate running path tends to float above the drive pulley, the outer peripheral surface of the feed belt is The projecting feed pin collides with the arcuate surface formed on the inner side surface of the belt regulating piece, and further lifting of the feed belt is prevented.
そして、前記送りベルトをその内歯により前記駆動プー
リの外歯に噛合せしめた状態において、前記送りピンと
前記ベルト規制片の円弧面との間の間隔を、前記送りベ
ルトに形成した内歯の前記駆動プーリに形成した外歯に
対する噛合寸法より小としたことにより、前記駆動側円
弧状走行路に位置する送りベルトの部分の浮上がり量
は、前記内歯の外歯に対する噛合寸法より小に制限され
るから、前記送りベルトの内歯が駆動プーリの外歯との
噛合状態から解放されることはなく、駆動プーリに対す
る送りベルトの滑りの発生が阻止され、かつベルトジヤ
ンピングの発生も阻止される。Then, in a state in which the feed belt is meshed with the outer teeth of the drive pulley by its inner teeth, the distance between the feed pin and the arc surface of the belt regulating piece is set to the inner teeth formed on the feed belt. Since the mesh size is smaller than the mesh size of the outer teeth formed on the drive pulley, the lift amount of the portion of the feed belt located on the drive side arcuate travel path is limited to be smaller than the mesh size of the inner teeth with the outer teeth. Therefore, the inner teeth of the feed belt are not released from the meshing state with the outer teeth of the drive pulley, the slippage of the feed belt with respect to the drive pulley is prevented, and the belt jumping is prevented from occurring. It
従つて本考案によるときは、駆動プーリにより送りベル
トを駆動して給紙作用を行なつている状態において、駆
動プーリの外歯と送りベルトの内歯の噛合力より大なる
外力が用紙に負荷された際においても、駆動プーリに対
する送りベルトの浮上がりを阻止し、駆動側円弧状走行
路に位置する送りベルトの部分の内歯と駆動プーリの外
歯との噛合状態を保持し、駆動プーリの駆動トルクを送
りベルトに確実に伝達させることができ、さらにベルト
ジヤンピングの発生も阻止して紙送り装置の耐久性を向
上せしめる等、実用面において優れた効果を奏するもの
である。Therefore, according to the present invention, when the feed belt is driven by the drive pulley to perform the paper feeding operation, an external force larger than the meshing force between the outer teeth of the drive pulley and the inner teeth of the feed belt is applied to the paper. Even when the drive pulley is driven, the feed belt is prevented from rising up with respect to the drive pulley, and the meshing state between the inner teeth of the part of the feed belt located on the drive side arcuate running path and the outer teeth of the drive pulley is maintained. The driving torque can be reliably transmitted to the feed belt, and further, belt jumping can be prevented from occurring and the durability of the paper feeding device can be improved.
本考案を、図面を示す実施例に基いて説明する。第１図
は前記実施例の紙送り装置を組付け前の各部品に分解し
て、各部品の構成と各部品間の関連性を示した紙送り装
置の分解斜視図であり、第２図は前記各部品を組付けた
紙送り装置の側断面図、第３図はその平面図である。The invention will be explained on the basis of an embodiment shown in the drawing. FIG. 1 is an exploded perspective view of the paper feeding device in which the paper feeding device of the above-described embodiment is disassembled into each component before assembly to show the configuration of each component and the relationship between each component. FIG. 3 is a side sectional view of a paper feeding device in which the above-mentioned components are assembled, and FIG. 3 is a plan view thereof.
図において、紙送り装置のフレーム８は、一対の側フレ
ーム9,10およびこれら一対の側フレーム9,10の間に配設
されるベルトガイド11の、３個の部材を後述するように
組付けて構成される。前記一対の側フレーム9,10の一端
部寄りには、軸受孔15,16が同一中心軸上に中心を有す
るようにそれぞれ貫通形成され、これら軸受孔15,16に
は、駆動プーリ17が、そのボス部18の軸方向両端部の外
周面において回転自在に支承され、該ボス部18の外周面
の中央部には大径のプーリ部21が前記ボス部18と同心的
にかつ前記一対の側フレーム9,10の間に位置するように
形成され、前記プーリ部21の外周面には外歯22が等間隔
に形成される。In the figure, a frame 8 of the paper feeding device is assembled with three members of a pair of side frames 9 and 10 and a belt guide 11 arranged between the pair of side frames 9 and 10 as described later. Consists of Bearing holes 15 and 16 are penetratingly formed near one end of the pair of side frames 9 and 10 so as to have their centers on the same central axis, and a driving pulley 17 is provided in these bearing holes 15 and 16. The boss portion 18 is rotatably supported on the outer peripheral surfaces of both ends in the axial direction, and a large-diameter pulley portion 21 is concentrically formed with the boss portion 18 at the center of the outer peripheral surface of the boss portion 18. The outer teeth 22 are formed so as to be located between the side frames 9 and 10, and outer teeth 22 are formed on the outer peripheral surface of the pulley portion 21 at equal intervals.
送りベルト１は、内周面に前記駆動プーリ17のプーリ部
21に形成した外歯22と噛合する内歯７が形成された無端
帯状に形成され、前記駆動プーリ17とフレーム８のベル
トガイド11の周面にわたつて掛け渡される。前記駆動プ
ーリ17には、前記ボス部18の中心軸を中心とする断面正
方形の角孔19が貫通形成され、該角孔19には断面正方形
の角軸とした駆動軸20が可及的に密にかつ摺動自在に嵌
挿される。該駆動軸20は原動機（図示せず）により回転
せしめられ、前記駆動プーリ17を駆動する。前記駆動プ
ーリ17が前記駆動軸20により回転駆動せしめられるとき
は、前記内歯７と駆動プーリ17の外歯22との噛合により
前記駆動プーリ17の一側外周面に沿つて走行せしめられ
るとともに、前記ベルトガイド11に形成されている直線
状のガイド面および前記駆動プーリ17とは長手方向にお
いて反対側の位置にある円弧状のガイド面とに沿つて走
行せしめられる。前記送りベルト１の外周面には、その
ベルト幅の中央部において、給送すべき用紙（図示せ
ず）の側端縁に沿つて一直線上に所定のピツチで列設さ
れている送り孔に対応した、所定数の送りピン６が前記
所定のピツチと同一のピツチで一直線上に突設されてい
る。ここで前記送りベルト１の走行状態の説明に便なる
ように、前記送りベルト１の内歯７が駆動プーリ17の外
歯22に噛合しながら前記駆動プーリ17の一側外周縁に沿
つて走行する走行路を駆動側円弧状走行路、該走行路を
走行する位置にある送りベルト１の部分を駆動側円弧状
走行部２と称し、また前記ベルトガイド11に形成したガ
イド面11aのうち円弧状のガイド面に沿つて走行する送
りベルト１の走行路を従動側円弧状走行路、該走行路を
走行する位置にある送りベルト１の部分を従動側円弧状
走行部３と称し、前記ベルトガイド11に形成したガイド
面11aのうち、一方の直線状のガイド面に沿つて走行
し、かつ用紙の送り孔に送りピン６を係合せしめつつ走
行する送りベルト１の走行路を直線状用紙送り走行路、
該走行路を走行する送りベルト１の部分を直線状紙送り
走行部４、他方の直線状のガイド面に沿う走行路を走行
する送りベルト１の部分を直線状走行部５と、それぞれ
称することにする。第１図に示す送りベルト１は、各走
行路２〜５の形状を示すように画かれている。The feed belt 1 has a pulley portion of the drive pulley 17 on the inner peripheral surface.
It is formed in an endless belt shape in which inner teeth 7 that mesh with outer teeth 22 formed in 21 are formed, and are stretched over the drive pulley 17 and the peripheral surface of the belt guide 11 of the frame 8. A square hole 19 having a square cross section centered on the central axis of the boss portion 18 is formed through the drive pulley 17, and a drive shaft 20 having a square cross section is formed in the square hole 19 as much as possible. It is inserted tightly and slidably. The drive shaft 20 is rotated by a prime mover (not shown) to drive the drive pulley 17. When the drive pulley 17 is driven to rotate by the drive shaft 20, the inner teeth 7 and the outer teeth 22 of the drive pulley 17 are meshed with each other so that the drive pulley 17 travels along one outer peripheral surface of the drive pulley 17. The belt is guided along a linear guide surface formed on the belt guide 11 and an arcuate guide surface on the opposite side of the drive pulley 17 in the longitudinal direction. On the outer peripheral surface of the feed belt 1, at the central portion of the belt width, there are provided feed holes which are lined up in a predetermined pitch along a side edge of a sheet (not shown) to be fed. Corresponding predetermined number of feed pins 6 are provided so as to protrude in a straight line with the same pitch as the predetermined pitch. Here, for convenience of explanation of the traveling state of the feed belt 1, the inner teeth 7 of the feed belt 1 mesh with the outer teeth 22 of the drive pulley 17 and run along one outer peripheral edge of the drive pulley 17. The running path is referred to as a driving side arcuate running path, the portion of the feed belt 1 at the position where the running path is run is referred to as a driving side arcuate running section 2, and a circle of the guide surface 11a formed on the belt guide The traveling path of the feed belt 1 traveling along the arc-shaped guide surface is referred to as a driven-side arcuate traveling path, and the portion of the feed belt 1 at a position traveling along the traveling path is referred to as a driven-side arcuate traveling portion 3, and the belt Of the guide surface 11a formed on the guide 11, a linear paper feed is performed along the running path of the feed belt 1 which runs along one of the linear guide surfaces and runs while the feed pin 6 is engaged with the feed hole of the paper. Driveway,
The portion of the feed belt 1 that travels on the traveling path is referred to as a linear paper feed traveling portion 4, and the portion of the feed belt 1 that travels along the other linear guide surface is referred to as a linear traveling portion 5. To The feed belt 1 shown in FIG. 1 is drawn so as to show the shapes of the traveling paths 2 to 5.
前記両側フレーム9,10の対向面には、前後各１対をなす
連結爪12,13がそれぞれ突設され、ベルトガイド11の前
後部には、前記各連結爪12,13と弾性係着する角孔状の
係止孔14が形成されている。そして、両側フレーム9,10
の各連結爪12,13をベルトガイド11の係止孔14にそれぞ
れ弾性係脱させることで、これら３者が一体状に連結さ
れる。A pair of front and rear connecting claws 12 and 13 are respectively provided on the opposing surfaces of the both side frames 9 and 10, and the front and rear portions of the belt guide 11 are elastically engaged with the respective connecting claws 12 and 13. A square hole-shaped locking hole 14 is formed. And both sides frame 9,10
By elastically engaging and disengaging the connecting claws 12 and 13 from the locking holes 14 of the belt guide 11, these three members are integrally connected.
前記両側フレーム9,10のうち、一方の側フレーム９の片
側縁には、送りベルト１の駆動側円弧状走行部２の外周
の送りピン６の先端に対し僅かな隙間をもつて対向して
駆動側円弧状走行部２の浮上がりを防止するための円弧
状のベルト規制片23が形成されている。このベルト規制
片23は、前記送りベルト１の駆動側円弧状走行部２にお
いて、少なくとも１本の送りピン６が位置するようにそ
の円弧の範囲が設定され、前記送りベルト１の駆動側円
弧状走行部２と対向する内側面に形成された円弧面23a
と前記送りベルト１の外周面に突設された送りピン６と
の間の間隔を、前記送りベルト１をその内歯７により前
記駆動プーリ17のプーリ部21に形成した外歯22に噛合せ
しめた状態において、前記送りベルト１に形成した内歯
７の前記外歯22に対する噛合寸法より小とする間隔とさ
れ、かつこの実施例では、第２図に示すように、ベルト
規制片23の円弧面23aの長さは、送りベルト１の隣接す
る送りピン６の間隔よりも適宜に長く形成されている。One side edge of one side frame 9 of the both side frames 9 and 10 is opposed to the tip end of the feed pin 6 on the outer periphery of the driving side arcuate traveling portion 2 of the feed belt 1 with a slight gap. An arcuate belt regulation piece 23 is formed to prevent the driving side arcuate traveling portion 2 from rising. The belt regulation piece 23 has an arc range set so that at least one feed pin 6 is positioned in the drive side arcuate traveling portion 2 of the feed belt 1, and the drive side arcuate shape of the feed belt 1 is set. An arc surface 23a formed on the inner surface facing the traveling portion 2
The feed belt 1 is meshed with the outer teeth 22 formed on the pulley portion 21 of the drive pulley 17 by the inner teeth 7 of the feed belt 1 so that the space between the feed pin 1 and the feed pin 6 provided on the outer peripheral surface of the feed belt 1 is protruded. In this state, the inner teeth 7 formed on the feed belt 1 are spaced so as to be smaller than the meshing dimension with the outer teeth 22, and in this embodiment, as shown in FIG. The length of the surface 23a is appropriately longer than the distance between the adjacent feed pins 6 of the feed belt 1.
前記送りベルト１の従動側円弧状走行部３を支承して送
りベルトの従動側円弧状走行路を形成する部分のベルト
ガイド11の円弧状のガイド面11a、送りベルト１の直線
状紙送り走行部４を支承して送りベルトの直線状紙送り
走行路を形成する部分のベルトガイド11の直線状のガイ
ド面11aおよび送りベルト１の直線状走行部５を支承し
て送りベルトの直線状走行路を形成する部分のガイド面
11aは、それぞれ送りベルト１の送りピンに対応する位
置において、ベルト走行方向に沿つて延在し、前記ガイ
ド面11aの部分の幅Ｗは、第３図に示すように前記送り
ピン６の直径Ｄとほぼ同幅になる程度まで狭く形成され
ており、送りベルト１の内面とベルトガイド11のガイド
面11aとの間に生じる摩擦力が軽減されている。また、
ベルトガイド11の両側面の前後部には、先端が前記両側
フレーム9,10の対向面とそれぞれ当接して、ベルトガイ
ド11のガイド面11aを送りベルト１の送りピン６に対応
する位置に保持するための所定数の保持ピン11bが突設
されている。さらに、ベルトガイド11のガイド面11aに
おいて、送りベルト１の従動側円弧状走行部３を支承す
るベルトガイド11のガイド面11aのうちの円弧状のガイ
ド面の部分および送りベルト１の直線状紙送り走行部４
と直線状走行部５とを支承するガイド面11aのうちの直
線状のガイド面の部分との間には所定の長さをもつて逃
げ溝11cが形成され、送りベルト１内面に対する接触面
積が小さくされている。An arcuate guide surface 11a of the belt guide 11 in a portion that supports the driven-side arcuate running portion 3 of the feed belt 1 and forms a driven-side arcuate running path of the feed belt, and a linear paper feed running of the feed belt 1. The linear guide surface 11a of the belt guide 11 and the linear running portion 5 of the feed belt 1 that support the portion 4 and form the linear paper feed running path of the feed belt. Guide surface of the part that forms the path
11a extend along the belt running direction at positions corresponding to the feed pins of the feed belt 1, and the width W of the portion of the guide surface 11a is the diameter of the feed pin 6 as shown in FIG. It is formed to be as narrow as the width D, and the frictional force generated between the inner surface of the feed belt 1 and the guide surface 11a of the belt guide 11 is reduced. Also,
The front and rear portions of both side surfaces of the belt guide 11 are brought into contact with the facing surfaces of the both side frames 9 and 10, respectively, and the guide surface 11a of the belt guide 11 is held at a position corresponding to the feed pin 6 of the feed belt 1. A predetermined number of holding pins 11b for projecting are provided. Further, on the guide surface 11a of the belt guide 11, the portion of the arc-shaped guide surface of the guide surface 11a of the belt guide 11 that supports the driven-side arc-shaped running portion 3 of the feed belt 1 and the linear paper of the feed belt 1 Feeding section 4
A clearance groove 11c having a predetermined length is formed between the linear guide surface portion of the guide surface 11a that supports the linear traveling portion 5 and the guide surface 11a. It has been made smaller.
さらに、前記一対の側フレーム9,10の対向面の上下部に
形成されかつ送りベルト１の直線状紙送り走行部４およ
び直線状走行部５の側縁を支持するベルト支持面9a,10a
において、送りベルト１の両直線状走行部4,5の略中央
部に対向する部分には、該送りベルト１の側縁と接触す
ることがないように、第１図に示すように切欠き状の逃
げ溝9c,10cがこれら側フレーム9,10の前後方向に形成さ
れている。これにより、これら側フレーム9,10の前記ベ
ルト支持面9a,10aと送りベルト１の両側縁との間に生じ
る摩擦力が軽減される。Further, belt supporting surfaces 9a, 10a which are formed on the upper and lower portions of the facing surfaces of the pair of side frames 9, 10 and support the side edges of the linear paper feeding traveling portion 4 and the linear traveling portion 5 of the feed belt 1.
In the portion of the feed belt 1 that faces the substantially central portions of the linear traveling portions 4 and 5, notches are formed as shown in FIG. 1 so as not to come into contact with the side edges of the feed belt 1. -Shaped relief grooves 9c and 10c are formed in the front-rear direction of these side frames 9 and 10. As a result, the frictional force generated between the belt supporting surfaces 9a, 10a of the side frames 9, 10 and both side edges of the feed belt 1 is reduced.
前記一対の側フレーム9,10のうち、一方の側フレーム10
の略中央部には支持軸25に対し軸方向へ移動可能に嵌挿
される筒状のボス部26が形成される。Of the pair of side frames 9 and 10, one side frame 10
A cylindrical boss portion 26 that is inserted into the support shaft 25 so as to be movable in the axial direction is formed at a substantially central portion of the.
他方の側フレーム９には、前記支持軸25に対しフレーム
８を所望とする位置に係脱可能に拘束保持するための、
ロツクレバー28を内装する上方開口箱形状の保持部27が
形成される。そして、この保持部27内面の一側縁をロツ
クレバー28の拘束面27aとしている。On the other side frame 9, for holding the frame 8 in a desired position with respect to the support shaft 25 in a detachable manner,
An upper opening box-shaped holding portion 27 for housing the lock lever 28 is formed. Then, one side edge of the inner surface of the holding portion 27 serves as a restraining surface 27a of the lock lever 28.
前記ロツクレバー28は、第１図、第３図、第４図及び第
５図に示すように、前記支持軸25が嵌挿される中心孔を
備えたボス部29と、該ボス部29の外周面より一体に突設
された操作ハンドル30とを主体として構成されている。
そしてロツクレバー28は、そのボス部29が前記保持部27
の上方開口部より挿入され、その中心孔が支持軸25に嵌
挿された状態において、操作ハンドル30が保持部27の開
口部より手動操作可能に突出されている。さらにロツク
レバー28のボス部29の外周面には、支持軸25の中心に対
し、第４図において反時計方向に逐次に曲率半径が増大
されたカム面31が形成され、このロツクレバー28を第５
図に示すように時計方向へ回動操作することで、そのカ
ム面31が保持部27の拘束面27aに噛込み、これによつて
フレーム８が支持軸25の所望とする位置にロツクされ、
異なる紙幅の用紙に対処しうる。As shown in FIGS. 1, 3, 4, and 5, the lock lever 28 includes a boss portion 29 having a central hole into which the support shaft 25 is inserted, and an outer peripheral surface of the boss portion 29. It is configured mainly with an operation handle 30 that is more integrally projected.
The boss 29 of the lock lever 28 has the holding portion 27.
The operation handle 30 is projected from the opening of the holding portion 27 so as to be manually operable in a state where the operation handle 30 is inserted from the upper opening of the holding shaft and the center hole thereof is fitted and inserted into the support shaft 25. Further, on the outer peripheral surface of the boss portion 29 of the lock lever 28, a cam surface 31 whose radius of curvature is successively increased counterclockwise in FIG. 4 is formed with respect to the center of the support shaft 25.
As shown in the drawing, the cam surface 31 is engaged with the restraining surface 27a of the holding portion 27 by pivoting in the clockwise direction, whereby the frame 8 is locked at a desired position of the support shaft 25,
Paper of different widths can be dealt with.
前記一方の側フレーム９の外側面の上部には、紙押えプ
レート34に対する前後一対の軸受片32が形成され、これ
ら軸受片32の上面に開口せしめて形成された軸受孔33に
は、紙押えプレート34の片側に一体に形成されたヒンジ
ピン35が回動可能に嵌め込まれる。そして、紙押えプレ
ート34はそのヒンジピン35を中心とし開閉されるととも
に、前記一対の側フレーム9,10の上端面に跨つて閉鎖さ
れることで、用紙の浮上がりを防止している。また、こ
の紙押えプレート34と一方の側フレーム９との相互に形
成されたばね掛け部36,37の間には、引張ばね38が介装
され、この引張ばね38のばね力によつて紙押えプレート
34が開放位置と閉鎖位置とにそれぞれ付勢されるように
なつている。また、紙押えプレート34には、送りベルト
１の送りピン６が移動可能な前後方向の長溝39が貫設さ
れている。A pair of front and rear bearing pieces 32 with respect to the paper pressing plate 34 are formed on an upper portion of the outer surface of the one side frame 9, and a paper pressing member is provided in a bearing hole 33 formed by opening the upper surfaces of the bearing pieces 32. A hinge pin 35 integrally formed on one side of the plate 34 is rotatably fitted therein. The paper pressing plate 34 is opened and closed around the hinge pin 35, and is closed over the upper end surfaces of the pair of side frames 9 and 10 to prevent the paper from floating. Further, a tension spring 38 is interposed between the spring holding portions 36 and 37 formed between the paper pressing plate 34 and the one side frame 9, and the paper pressing is performed by the spring force of the tension spring 38. plate
34 is biased into an open position and a closed position, respectively. Further, the paper pressing plate 34 is provided with a long groove 39 in the front-rear direction through which the feed pin 6 of the feed belt 1 can move.
なお、上記したように構成される紙送り装置は左右一対
をなして駆動軸20と支持軸25との間に跨つて軸方向へ移
動可能に配設される。また、両側フレーム9,10、ベルト
ガイド11等は合成樹脂によりそれぞれ形成され、特に、
ベルトガイド11は摩擦係数が小さい合成樹脂材によつて
成形されている。The paper feeding device configured as described above forms a pair of left and right, and is arranged movably in the axial direction across the drive shaft 20 and the support shaft 25. Further, the both side frames 9, 10, the belt guide 11 and the like are each made of synthetic resin, and in particular,
The belt guide 11 is formed of a synthetic resin material having a small friction coefficient.
また、周知のように、駆動軸20及び支持軸25はプリン
タ，コンピユータ側のフレーム内に架設され、駆動軸20
はモータを駆動源とする駆動ユニツトによつて回転駆動
される。Further, as is well known, the drive shaft 20 and the support shaft 25 are installed in a frame on the printer and computer side, and
Is rotationally driven by a drive unit having a motor as a drive source.
上述したように構成されるこの実施例において、左右一
対をなす紙送り装置のそれぞれに備えた送りベルト１の
送りピン６に対し、用紙の左右両側部に形成された送り
孔を嵌合させ、紙押えプレート34を閉鎖した状態のもと
で、駆動軸20によつて駆動プーリ17を所定方向へ回転
し、送りベルト１を駆動させることで紙送りがなされ
る。In this embodiment configured as described above, the feed holes formed on both left and right sides of the paper are fitted to the feed pins 6 of the feed belt 1 provided in the pair of left and right paper feed devices, respectively. With the paper pressing plate 34 closed, the drive pulley 17 is rotated in the predetermined direction by the drive shaft 20 and the feed belt 1 is driven to feed the paper.
前記送りベルト１の駆動時において、送りベルト１の駆
動側円弧状走行部２の内歯７と、駆動プーリ17の外歯22
との噛合力よりも大きい外力が用紙に負荷された場合、
駆動プーリ17の外歯22に対し、送りベルト１の駆動側円
弧状走行部２が浮上がろうとするが、この駆動側円弧状
走行部２の送りピン６がベルト規制片23の円弧面23aに
当接することで、前記駆動側円弧状走行部２の浮上がり
が規制される。このため、前記送りベルト１の駆動側円
弧状走行部２の浮上がりが原因となる滑りやベルトジヤ
ンピング等が確実に防止され、送りベルト１の駆動側円
弧状走行部２の内歯７と駆動プーリ17の外歯22との噛合
を保持することができる。このため、駆動プーリ17の駆
動トルクが送りベルト１の駆動側円弧状走行部２に確実
に伝達され、用紙の移送不良を防止することができる。When the feed belt 1 is driven, the inner teeth 7 of the driving-side arcuate traveling portion 2 of the feed belt 1 and the outer teeth 22 of the drive pulley 17 are driven.
When an external force greater than the meshing force with is applied to the paper,
The drive-side arcuate running portion 2 of the feed belt 1 tries to float up with respect to the outer teeth 22 of the drive pulley 17, but the feed pin 6 of this drive-side arcuate running portion 2 is placed on the arcuate surface 23a of the belt regulation piece 23. The abutment restricts the lifting of the drive-side arcuate traveling portion 2. Therefore, slippage, belt jumping, etc. due to the lifting of the driving-side arcuate running portion 2 of the feed belt 1 are reliably prevented, and the inner teeth 7 of the driving-side arcuate running portion 2 of the feed belt 1 are prevented. The meshing with the outer teeth 22 of the drive pulley 17 can be maintained. For this reason, the drive torque of the drive pulley 17 is reliably transmitted to the drive-side arcuate traveling portion 2 of the feed belt 1, and it is possible to prevent defective transfer of the sheet.
図面はこの考案の一実施例を示すもので、第１図は紙送
り装置を分解して示す斜視図、第２図は側断面図、第３
図は平断面図、第４図はロツクレバーのカム面と拘束面
とがロツク解除された状態を示す断面図、第５図は同じ
くロツク状態を示す断面図である。 １……送りベルト、２……駆動側円弧状走行部、３……
従動側円弧状走行部、４……直線状紙送り走行部、５…
…直線状走行部、６……送りピン、７……内歯、８……
フレーム、9,10……側フレーム、17……駆動プーリ、22
……外歯、23……ベルト規制片、23a……円弧面The drawings show an embodiment of the present invention. FIG. 1 is an exploded perspective view of a paper feeding device, FIG. 2 is a side sectional view, and FIG.
FIG. 4 is a plan sectional view, FIG. 4 is a sectional view showing a state where the cam surface and the restraining surface of the lock lever are unlocked, and FIG. 5 is a sectional view showing the same locked state. 1 ... Feed belt, 2 ... Driving side arcuate traveling section, 3 ...
Driven side arc-shaped running part, 4 ... Linear paper feed running part, 5 ...
… Straight running section, 6 …… Feed pin, 7 …… Internal teeth, 8 ……
Frame, 9, 10 …… Side frame, 17 …… Drive pulley, 22
...... External teeth, 23 …… Belt restriction piece, 23a …… Arc surface
Claims (1)
レームと、該フレームの一端部寄りに前記一対の側フレ
ーム間に配設されてこれら側フレームに回転自在に支承
され、外周縁に外歯が形成された駆動プーリと、該駆動
プーリの前記外歯と噛合する内歯が内周面に形成され、
外周面に送りピンが所定ピツチで突設された無端帯状に
形成され、前記一対の側フレーム間において前記内歯が
前記駆動プーリの外歯に噛合する前記駆動プーリの一側
外周面と、前記一対の側フレーム間において前記フレー
ムに備えたベルトガイドのガイド面とに沿つて走行せし
められる送りベルトとを有する紙送り装置において、 前記一対の側フレームのうち一方の側フレームに、前記
駆動プーリに噛合して該駆動プーリの一側外周面に沿つ
て前記送りベルトが走行せしめられる駆動側円弧状走行
路の外周位置に、内側面を前記駆動側円弧状走行路に沿
つた円弧面としたベルト規制片を形成し、かつ前記送り
ベルトをその内歯により前記駆動プーリの外歯に噛合せ
しめた状態において、前記送りベルトの送りピンと、前
記ベルト規制片の円弧面との間の間隔を、前記送りベル
トに形成した内歯の前記駆動プーリに形成した外歯に対
する噛合寸法により小としたことを特徴とする紙送り装
置。1. A frame provided with a pair of side frames opposed to each other, a frame disposed between the pair of side frames near one end of the frame, rotatably supported by the side frames, and having an outer periphery. A drive pulley having teeth formed therein, and inner teeth meshing with the outer teeth of the drive pulley are formed on an inner peripheral surface,
A feed pin is formed on the outer peripheral surface in an endless belt shape protruding with a predetermined pitch, and the one inner peripheral surface of the drive pulley in which the inner teeth mesh with the outer teeth of the drive pulley between the pair of side frames, In a paper feeding device having a feed belt that is made to travel along a guide surface of a belt guide provided in the frame between a pair of side frames, one side frame of the pair of side frames, the drive pulley A belt having an inner side surface having an arcuate surface along the drive-side arcuate travel path at an outer peripheral position of the drive-side arcuate travelway in which the feed belt is caused to travel along the one-side outer peripheral surface of the drive pulley. In the state in which the regulation piece is formed and the feed belt is meshed with the outer teeth of the drive pulley by the inner teeth thereof, the feed pin of the feed belt and the circle of the belt regulation piece A paper feeding device, characterized in that a space between the arc surface and the arc surface is made smaller by a meshing dimension of inner teeth formed on the feed belt with outer teeth formed on the drive pulley.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986188158U JPH0644701Y2 (en) | 1986-12-05 | 1986-12-05 | Paper feeder |
| US07/122,845 US4826337A (en) | 1986-11-28 | 1987-11-19 | Web feed tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986188158U JPH0644701Y2 (en) | 1986-12-05 | 1986-12-05 | Paper feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6392754U JPS6392754U (en) | 1988-06-15 |
| JPH0644701Y2 true JPH0644701Y2 (en) | 1994-11-16 |
Family
ID=31139268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986188158U Expired - Lifetime JPH0644701Y2 (en) | 1986-11-28 | 1986-12-05 | Paper feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0644701Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02138067A (en) * | 1988-11-19 | 1990-05-28 | Tokai Kogyo Kk | Paper feed tractor |
| JPH0645254B2 (en) * | 1988-11-28 | 1994-06-15 | 東海興業株式会社 | Paper feed tractor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50113506U (en) * | 1974-03-04 | 1975-09-16 | ||
| US4697727A (en) * | 1985-11-25 | 1987-10-06 | Precision Handling Devices, Inc. | Document feed tractor |
-
1986
- 1986-12-05 JP JP1986188158U patent/JPH0644701Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6392754U (en) | 1988-06-15 |
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