JPS6117961Y2

JPS6117961Y2 -

Info

Publication number: JPS6117961Y2
Application number: JP1821481U
Authority: JP
Priority date: 1981-02-13
Filing date: 1981-02-13
Publication date: 1986-05-31
Also published as: JPS57131544U

Description

【考案の詳細な説明】本考案は板ばねの偏倚力を用いて、媒体を間歇
的に給送する媒体給送機構に関するものである。[Detailed Description of the Invention] The present invention relates to a medium feeding mechanism that uses the biasing force of a leaf spring to feed a medium intermittently.

従来の媒体給送機構では特願昭54−62140号
（特公昭57−52233号）に示すように、高摩擦抵抗
を有するウレタンゴムなどのフリクシヨン部材を
用いていた。このフリクシヨン部材は媒体へのか
み合い開始からかみ合い完了までのストロークが
小さいため、かみ合い開始時の媒体への押圧力が
大きい、媒体に押圧した跡がつく、また、過負荷
過防止用ストツパの設置が難かしいなどの欠点が
あつた。 As shown in Japanese Patent Application No. 54-62140 (Japanese Patent Publication No. 57-52233), a conventional medium feeding mechanism uses a friction member such as urethane rubber having high frictional resistance. Since this friction member has a small stroke from the start of engagement to the completion of engagement with the media, the pressing force on the media at the start of engagement is large, pressure marks are left on the media, and it is difficult to install a stopper to prevent overload. It had some drawbacks, such as being difficult.

本考案は以上の欠点を除去するものであり、以
下実施例を用いて詳細に説明する。 The present invention eliminates the above-mentioned drawbacks, and will be explained in detail below using examples.

第１図は本考案に係る媒体給送機構の一実施例
を示す概略側面図である。同図において、１は給
送すべき媒体、２はこの媒体１が逆方向（右方
向）に給送されるのを防止する逆方向給送防止部
材であり、図示せぬ筐体に固定されている。 FIG. 1 is a schematic side view showing an embodiment of a medium feeding mechanism according to the present invention. In the figure, 1 is a medium to be fed, and 2 is a reverse feeding prevention member that prevents the medium 1 from being fed in the opposite direction (rightward), and is fixed to a housing (not shown). ing.

３はこの媒体１を正方向（左方向）に間歇的に
一定量だけ給送するため、図示せぬ駆動機構によ
つて往復運動する正方向給送部材である。なお、
この正方向給送部材３の構造には次の通りであ
る。まず、４は一端４ａが媒体１に接触し、他端
がスライド部材５に固定された板ばね、６は前記
媒体１を介して、この板ばね２に対向して設けら
れた押付部材、７は板ばね４のストツパである。
また、逆方向給送防止部材２の構造は正方向給送
部材３の構造と同一のため、説明を省略する。ま
た、板ばね４のかみ合い開始状態を第１図に示
し、かみ合い終了状態を第２図ａに示す。また、
この実施例では押付部材６はスライド部材５に設
けた場合を示したがスライド部材５から分離し、
図示せぬ筐体に固定してもよいことはもちろんで
ある。この場合、押付部材６はスライド部材５の
移動長にわたる長さのものにすることはもちろん
である。 Reference numeral 3 denotes a forward feeding member which is reciprocated by a drive mechanism (not shown) in order to intermittently feed the medium 1 by a fixed amount in the forward direction (leftward). In addition,
The structure of this forward feeding member 3 is as follows. First, 4 is a leaf spring whose one end 4a is in contact with the medium 1 and the other end is fixed to the slide member 5; 6 is a pressing member provided facing the leaf spring 2 through the medium 1; 7; is the stopper of the leaf spring 4.
Further, since the structure of the reverse direction feeding prevention member 2 is the same as that of the forward direction feeding member 3, the explanation will be omitted. Further, FIG. 1 shows a state in which the leaf spring 4 starts to engage, and FIG. 2a shows a state in which the leaf spring 4 ends in engagement. Also,
In this embodiment, the pressing member 6 is provided on the slide member 5, but it is separated from the slide member 5.
Of course, it may be fixed to a casing (not shown). In this case, it goes without saying that the pressing member 6 should have a length that covers the moving length of the slide member 5.

次に、上記構成に係る媒体給送機構の動作につ
いて第２図ａおよび第２図ｂを参照して説明す
る。 Next, the operation of the medium feeding mechanism according to the above configuration will be explained with reference to FIGS. 2a and 2b.

まず、第１図に示す状態において、図示せぬ駆
動機構を動作とすると、正方向給送部材２は正方
向（左方向）に移動するが、このとき、板ばね４
の一端４ａは第２図ａに示すように、媒体１に係
合する。このため、正方向給送部材２の移動に伴
なつて、媒体１を正方向に移動し、そして、正方
向給送部材３は第２図ａに示すように、移動す
る。次に、図示せぬ駆動機構が逆転し、正方向給
送部材２は第２図ｂに示すように逆方向（右方
向）に移動するが、このとき、板ばね４は拘束さ
れないため、その一端４ａは媒体１に係合せず、
単なる接触状態におかれる。一方、逆方向給送部
材２の板ばねは第２図ｂに示すように拘束され、
その一端４ａは媒体１に係合し、媒体１の逆方向
への給送を防止する。そして、正方向給送部材３
が第１図に示す位置に復帰すると共に、逆方向給
送部材２の板ばね４もその偏倚力により第１図の
状態に復帰し、媒体１の一定量の給送を終了す
る。 First, in the state shown in FIG. 1, when the drive mechanism (not shown) is operated, the forward feeding member 2 moves in the forward direction (to the left), but at this time, the leaf spring 4
One end 4a engages the medium 1, as shown in FIG. 2a. Therefore, as the forward direction feeding member 2 moves, the medium 1 is moved in the forward direction, and the forward direction feeding member 3 moves as shown in FIG. 2a. Next, the drive mechanism (not shown) reverses, and the forward feeding member 2 moves in the opposite direction (rightward) as shown in FIG. One end 4a does not engage the medium 1,
be placed in a state of mere contact. On the other hand, the leaf spring of the reverse direction feeding member 2 is restrained as shown in FIG. 2b,
Its one end 4a engages the medium 1 and prevents the medium 1 from being fed in the opposite direction. Then, the forward direction feeding member 3
is returned to the position shown in FIG. 1, and at the same time, the leaf spring 4 of the reverse direction feeding member 2 is also returned to the state shown in FIG.

また、予期せぬ過大な力が媒体に作用した時は
第３図に示すように、板ばね４はストツパ７に突
き当たり、変形が防止されると共に、媒体送り力
が増大しなくなり、板ばね４と媒体との間ですべ
りが生じる。このため、過大な力による板ばね４
の破損が防止される。 Furthermore, when an unexpectedly excessive force is applied to the medium, the leaf spring 4 hits the stopper 7 as shown in FIG. 3, preventing deformation and preventing the medium feeding force from increasing. Slip occurs between the material and the medium. For this reason, the leaf spring 4 due to excessive force
damage is prevented.

以上、詳細に説明したように、本考案に係る媒
体給送機構によれば板ばねの媒体へのかみ合い開
始からかみ合い完了までのストロークが大きくと
れるため、かみ合い開始時の媒体への押圧力を小
さくすることができるなどの効果がある。 As explained in detail above, the media feeding mechanism of the present invention has the advantage that the stroke from when the leaf spring starts to engage with the media to when engagement is completed can be made large, thereby reducing the pressing force on the media when engagement begins.

[Brief explanation of the drawing]

第１図は本考案に係る媒体給送機構の一実施例
を示す概略側面図、第２図ａ，第２図ｂおよび第
３図は第１図の動作を説明するための図である。１……媒体、２……逆方向給送防止部材、３…
…正方向給送部材、４……板ばね、５……スライ
ド部材、６……押付部材、７……ストツパ。 FIG. 1 is a schematic side view showing one embodiment of a medium feeding mechanism according to the present invention, and FIGS. 2a, 2b, and 3 are diagrams for explaining the operation of FIG. 1. 1... Medium, 2... Reverse direction feeding prevention member, 3...
... Positive direction feeding member, 4... Leaf spring, 5... Slide member, 6... Pressing member, 7... Stopper.

Claims

[Scope of utility model registration request]

At least a pair of leaf springs each having a shape in which a tip portion protrudes in the medium feeding direction with respect to a central portion are arranged at a predetermined interval back and forth along the medium feeding path, and one leaf spring is located on the front side in the medium feeding direction. The proximal end of is fixed,
The base end of the other leaf spring is supported by a slide member that reciprocates a certain distance in the medium feeding direction, and a predetermined position is placed near both of the leaf springs to prevent deformation of the leaf spring in the opposite direction to the medium feeding direction. A medium feeding mechanism characterized in that a stopper is provided to stop the medium, and the medium is intermittently fed by being held between the tip ends of the pair of leaf springs and a pressing member located above the medium.