JP2693985B2 - Method for manufacturing driven roll of ink ribbon cartridge - Google Patents
Method for manufacturing driven roll of ink ribbon cartridgeInfo
- Publication number
- JP2693985B2 JP2693985B2 JP33311988A JP33311988A JP2693985B2 JP 2693985 B2 JP2693985 B2 JP 2693985B2 JP 33311988 A JP33311988 A JP 33311988A JP 33311988 A JP33311988 A JP 33311988A JP 2693985 B2 JP2693985 B2 JP 2693985B2
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- ink ribbon
- driven roll
- molding
- gear
- 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
- Impression-Transfer Materials And Handling Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、インクリボンカートリッジにおいて駆動ロ
ールと協同してインクリボンを挾持しつつこれをリボン
収納部側へ引き込むために前記駆動ロールと対向配設さ
れる従動ロールの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an ink ribbon cartridge so as to face the drive roll in order to hold the ink ribbon in cooperation with the drive roll and pull the ink ribbon toward the ribbon storage portion. The present invention relates to a method for manufacturing a driven roll provided.
インクリボンカートリッジは、第7図に示す如く、左
右一対のリボンガイド用腕部(1A),(1B)を一体形成
してある合成樹脂製の本体ケース(1)と、該本体ケー
ス(1)の上方開口部を閉止する合成樹脂製の蓋体
(2)とを主要構成として備え、前記一対の腕部(1
A),(1B)間に掛け渡されたインクリボン(R)をイ
ンパクトドットヘッド(図示せず)により印打可能に構
成してある。そして、前記本体ケース(1)には、イン
クリボン(R)の主要部を折畳み状態で収納する左右に
長いリボン収納部(3)が形成され、該リボン収納部
(3)の入口側には、駆動ロール(4)と、該駆動ロー
ル(4)として協同して前記インクリボン(R)を挾持
状態で前記リボン収納部(3)側に引き込む従動ロール
(5)とが対向配設されている。なお、前記リボン収納
部(3)の出口側には、インクリボン(R)を通過させ
るリボン通路(6)を備えた固定壁(7)が設けられて
いる。As shown in FIG. 7, the ink ribbon cartridge includes a main body case (1) made of synthetic resin in which a pair of left and right ribbon guide arms (1A) and (1B) are integrally formed, and the main body case (1). And a lid (2) made of synthetic resin for closing the upper opening of the pair of arms (1).
The ink ribbon (R) stretched between (A) and (1B) can be printed by an impact dot head (not shown). The main body case (1) is formed with a left and right long ribbon storage portion (3) for storing a main portion of the ink ribbon (R) in a folded state, and an inlet side of the ribbon storage portion (3) is formed. A driving roll (4) and a driven roll (5) that cooperates as the driving roll (4) and pulls the ink ribbon (R) into the ribbon storage section (3) side in a sandwiched state, facing each other. There is. A fixed wall (7) having a ribbon passage (6) for passing the ink ribbon (R) is provided on the outlet side of the ribbon storage section (3).
前記従動ロール(5)は、インクリボン(R)を上述
したように駆動ロール(4)と協同して挾持しつつこれ
を移動させるときの挾持移動力を増大させるため、イン
クリボン(R)と当接することとなる外周面に歯状凹凸
が形成されているが、該歯状凹凸は前記外周面の全面に
形成されているわけではなく、第8図に示すように断続
的に形成され、その他の部分はインクリボン(R)に当
接しないように縮径した状態となっている。即ち、前記
従動ロール(5)は、前記インクリボン(R)に外周面
が当接させられる複数の歯車状部(5a)と、該複数の歯
車状部(5a)の中間に位置し、前記インクリボン(R)
には当接しないように前記歯車状部(5a)よりも縮径さ
れた縮径部(5b)との組合せから構成されている。この
ように従動ロール(5)の一部に縮径部(5b)を設けて
あるのは、本体ケース(1)に位置変更自在に取り付け
られる支持部材(10)の先端突出部(10a)を、前記縮
径部(5b)の周囲の溝状部に合致させ、該先端突出部
(10a)にて前記縮径部(5b)を把持することにより、
支持部材(10)による従動ロール(5)の支持を達成す
るためである。また前記インクリボン(R)がリボン収
納部(3)側へ引き込まれるに際して前記インクリボン
(R)が従動ロール(5)に必要以上に当接付着するの
を前記先端突出部(10a)によって強制的に離脱させ、
もって前記インクリボン(R)がリボン収納部(3)側
へ確実に引き込まれるようにするためである。Since the driven roll (5) cooperates with the drive roll (4) to hold the ink ribbon (R) and increases the holding movement force when moving the ink roll (4) as described above, Tooth-shaped irregularities are formed on the outer peripheral surface that comes into contact with each other, but the tooth-shaped irregularities are not formed on the entire outer peripheral surface, and are intermittently formed as shown in FIG. The other parts are in a reduced diameter so as not to contact the ink ribbon (R). That is, the driven roll (5) is located between a plurality of gear-shaped portions (5a) whose outer peripheral surface is brought into contact with the ink ribbon (R) and the plurality of gear-shaped portions (5a), Ink ribbon (R)
To be in contact with the gear-shaped portion (5a) so as not to come into contact with the diameter-reduced portion (5b). In this way, the reduced diameter portion (5b) is provided in a part of the driven roll (5) because the tip end protruding portion (10a) of the support member (10) that is removably attached to the main body case (1) is , By matching with the groove-shaped portion around the reduced diameter portion (5b) and gripping the reduced diameter portion (5b) with the tip protrusion (10a),
This is to achieve the support of the driven roll (5) by the support member (10). Further, when the ink ribbon (R) is pulled toward the ribbon storage portion (3), the ink ribbon (R) is forced to abut and adhere to the driven roll (5) more than necessary by the tip protruding portion (10a). To disengage,
This is to ensure that the ink ribbon (R) is drawn into the ribbon storage section (3).
かかる従動ロール(5)の支持構造にあっては、前記
支持部材(10)の先端突出部(10a)に一定以上の強度
を持たせる必要があること等の事情に基づき、前記先端
突出部(10a)を比較的幅広のものとなし、該幅広の先
端突出部(10a)を前記従動ロール(5)の縮径部(5
b)の周囲に配置することとしているため、前記従動ロ
ール(5)はその縮径部(5b)の幅寸法が前記歯車状部
(5a)のそれよりも長く設定されていることが多い。In such a support structure for the driven roll (5), the tip protrusion (10a) of the support member (10) needs to have a certain strength or more. 10a) is made relatively wide, and the wide end projecting portion (10a) is used as the reduced diameter portion (5) of the driven roll (5).
Since it is arranged around b), the width of the reduced diameter portion (5b) of the driven roll (5) is often set longer than that of the gear-shaped portion (5a).
なお、かかる従動ロール(5)としては、中実のもの
が一般的に用いられているが、軽量化等の対策を講じる
必要がある場合には軸方向に延在する貫通孔(5c)を中
心部に穿設したものも用いられる。As the driven roll (5), a solid one is generally used, but when it is necessary to take measures such as weight reduction, a through hole (5c) extending in the axial direction is used. It is also used that is provided in the center.
上述の如く複雑な形状を呈する従動ロール(5)は、
一般に、射出成形によって製造されることが多い。そし
て前記従動ロール(5)を射出成形によって製造する場
合、その製造の一過程である成形型の型開き過程で、成
形型の縮径部相応箇所は少なくとも分割タイプとしてこ
れを相互離隔方向へ移動させる必要がある。なぜなら、
成形型の縮径部相応箇所を形成後もそのままの位置に保
持しておいたならば、成形品の縮径部と成形型の縮径部
相応箇所とが絡み合って成形品を突出し部材を用いてそ
の軸方向へ突き出すことができないからである。一方、
成形型の歯車状部相応箇所方は、分割型としてこれを単
純に相互離隔方向へ移動させることができない。なぜな
ら、前記歯車状部(5a)にはその外周面に歯状凹凸が形
成されているために該歯状凹凸の一部(具体的には前記
分割型の移動方向と交叉する方向に突出退入する凹凸が
前記分割型を移動するときに該分割型と係わり合い、該
分割型の円滑な移動を妨げるからである。The driven roll (5) having a complicated shape as described above is
Generally, it is often manufactured by injection molding. When the driven roll (5) is manufactured by injection molding, in the mold opening process, which is one process of manufacturing the driven roll (5), at least part corresponding to the reduced diameter portion of the mold is divided type and moved in the mutually separating direction. Need to let. Because
If the part corresponding to the reduced diameter part of the mold is kept in the same position after forming, the reduced part of the molded product and the corresponding part of the reduced part of the mold are entangled and the molded product is projected using a member. This is because it cannot project in the axial direction. on the other hand,
The parts corresponding to the gear-shaped parts of the forming die are split dies and cannot be simply moved in the direction away from each other. This is because the gear-like portion (5a) has tooth-like irregularities formed on its outer peripheral surface, and therefore a part of the tooth-like irregularities (specifically, protruding and retracting in a direction intersecting the moving direction of the split mold). This is because the concaves and convexes to be inserted engage with the split mold when moving the split mold, and hinder the smooth movement of the split mold.
そこで、従来は、第9図(イ),(ロ),(ハ)に示
す如く、成形型(21)のうちの成形品(51)を形成する
空間の周囲に相応する部分を、歯車状部相応箇所は固定
型(21a)とすると共に縮径部相応箇所は分割させて相
互離隔方向へ移動自在な移動型(21b)とし、第9図
(イ)に示す成形の後に、第9図(ロ)に示す如く移動
型(21b)を相互離隔方向へ移動させて該移動型(21b)
と成形品(51)とが係わり合った状態を解除し、然る後
に突出し部材(22)を用いて成形品(51)を第9図
(ハ)に示す如く突き出すことにより、該成形品(51)
を成形型(21)外へ取り出すこととしていた。なお、成
形品(51)を突き出す前には、成形型(21)の蓋部(21
c)を予め撤去しておくのはいうまでもない。Therefore, conventionally, as shown in FIGS. 9 (a), 9 (b), and 9 (c), a portion of the mold (21) corresponding to the periphery of the space for forming the molded product (51) is formed into a gear shape. The corresponding parts of the parts are fixed molds (21a), and the corresponding parts of the reduced diameter parts are divided into movable molds (21b) which are movable in the direction of separation from each other. After the molding shown in FIG. As shown in (b), the movable die (21b) is moved in a direction away from each other to move the movable die (21b).
And the molded product (51) are released from each other, and then the molded product (51) is ejected using the projecting member (22) as shown in FIG. 51)
Was taken out of the mold (21). Before ejecting the molded product (51), cover (21) of the molding die (21).
It goes without saying that c) should be removed in advance.
かかる方法にて成形品(51)を成形型(21)外へ取り
出す場合において、製造対象となる従動ロール(5)の
縮径部(5b)の幅寸法が歯車状部(5a)のそれよりも第
9図に示すように短いときには、突出し部材(22)を用
いて成形品(51)を突き出す過程で、その歯車状部(51
a)が常に前記固定型(21a)の歯状凹凸成形面のいずれ
か(これらはいずれも周方向位相が合致している)に係
合することとなるので、成形品(51)はその周方向へ回
転することなく突き出され、該成形品(51)はその歯車
状部(51a)の外周面の歯状凹凸が固定型(21a)の内周
面の歯状凹凸と干渉することがなく円滑に突き出される
こととなる。When the molded product (51) is taken out of the molding die (21) by such a method, the width dimension of the reduced diameter portion (5b) of the driven roll (5) to be manufactured is smaller than that of the gear-shaped portion (5a). 9 is also short as shown in FIG. 9, in the process of ejecting the molded product (51) using the protrusion member (22), the gear-like portion (51
Since (a) always engages with any one of the tooth-shaped concave-convex molding surfaces of the fixed mold (21a) (these all have the same circumferential phase), the molded product (51) is The molded product (51) is projected without rotating in the direction, and the tooth-like irregularities on the outer peripheral surface of the gear-like part (51a) do not interfere with the tooth-like irregularities on the inner peripheral surface of the fixed die (21a). It will be ejected smoothly.
然るに、製造対象となる従動ロール(5)の縮径部
(5b)の幅寸法が歯車状部(5a)のそれよりも第10図に
示すように長いときには、突出し部材(22)を用いて成
形品(51)を突き出す過程で、その歯車状部(51a)が
前記固定型(21a)の歯状凹凸成形面のいずれにも係合
しなくて遊離した状態になり得るので、その遊離状態で
成形品(51)がその周方向へ回転し得る結果、該成形品
(51)の歯車状部(51a)の外周面の歯状凹凸と固定型
(21a)の内周面の歯状凹凸との周方向位相が合致しな
くなって上述の両歯状凹凸が干渉することとなり、成形
品(51)の突出しが不可能になった或いは成形品(51)
の歯車状部(51a)に疵が付いたりするという問題が生
じる。However, when the width dimension of the reduced diameter portion (5b) of the driven roll (5) to be manufactured is longer than that of the gear-shaped portion (5a) as shown in FIG. 10, the protruding member (22) is used. In the process of ejecting the molded product (51), the gear-like portion (51a) can be in a released state without engaging with any of the tooth-shaped concave-convex molding surfaces of the fixed die (21a). As a result of the molded article (51) being able to rotate in the circumferential direction, tooth-shaped irregularities on the outer peripheral surface of the gear-shaped part (51a) of the molded article (51) and tooth-shaped irregularities on the inner peripheral surface of the fixed die (21a). And the phase in the circumferential direction do not match, and the above-mentioned tooth-shaped irregularities interfere with each other, making it impossible to project the molded product (51) or the molded product (51).
There is a problem in that the gear-shaped portion (51a) of (1) has a flaw.
本発明は、かかる事情に鑑みてなされたものであり、
上述の問題を解消し得る手段を提供することを目的とし
ている。The present invention has been made in view of such circumstances,
It is an object to provide means capable of solving the above-mentioned problem.
本発明に係るインクリボンカートリッジの従動ロール
の製造方法は、 インクリボンを駆動ロールと協同して挾持しつつ該イ
ンクリボンをリボン収納部側へ引き込むために、該イン
クリボンに外周面が当接させられる複数の歯車状部と、 該複数の歯車状部の中間に位置し、前記インクリボン
には当接しないように前記歯車状部よりも縮径され、し
かも幅寸法が前記歯車状部のそれより長く設定された縮
径部との組合せから構成された従動ロールを、 射出成形装置の成形型内にて成形した後、その成形品
を前記前記成形型から取り出すべく前記成形型かの前記
縮径部に相応する部分を局部的に拡径させて型開きを行
った上で、前記成形型の軸方向へ移動自在な突出し部材
を移動させて前記成形品の端面を押圧しこれを前記成形
型外へ突き出して製造する方法において、 前記射出成形装置に、突出し部材にて前記成形品が突
き出される過程で前記成形品の周方向への回動を阻止す
る回動阻止手段を前記成形型の歯状凹凸成形面以外に予
め設けておき、 該回動阻止手段を用いて前記成形品の周方向への回動
を阻止しつつ該成形品を前記成形型外へ突き出す点に特
徴を有している。A method for manufacturing a driven roll of an ink ribbon cartridge according to the present invention is such that an outer peripheral surface of the ink ribbon is brought into contact with the ink ribbon in order to hold the ink ribbon in cooperation with a drive roll and pull the ink ribbon toward the ribbon storage portion. A plurality of gear-shaped portions that are located between the gear-shaped portions and have a diameter that is smaller than that of the gear-shaped portions so as not to contact the ink ribbon. After molding a driven roll composed of a combination with a reduced-diameter portion set to be longer, in a molding die of an injection molding device, the compression of the molding die is taken out to take out the molded product from the molding die. After the part corresponding to the diameter part is locally expanded in diameter to open the mold, the projecting member movable in the axial direction of the forming mold is moved to press the end surface of the formed product and press the end face. Stick out of the mold In the method of manufacturing, in the injection molding device, there is provided rotation preventing means for preventing rotation of the molded product in a circumferential direction in a process in which the molded product is projected by a projecting member. It is characterized in that it is provided in advance on a surface other than the surface, and the rotation preventing means is used to prevent the rotation of the molded product in the circumferential direction while the molded product is projected out of the molding die.
かかる本発明方法を用いてインクリボンカートリッジ
の従動ロールを製造する場合は、射出成形装置の成形型
内に成形品を成形した後にこれを成形型外へ突き出す過
程で、該成形品は、前記回動阻止手段によって成形型の
成形面にてガイドされずともその周方向への回動が阻止
され、その回動阻止状態のまま成形型外へ突き出される
こととなる。When the driven roll of the ink ribbon cartridge is manufactured by using the method of the present invention, the molded product is formed in the mold of the injection molding apparatus and then ejected outside the mold, Even if it is not guided by the molding surface of the molding die by the movement preventing means, its rotation in the circumferential direction is prevented, and the molding die is projected out of the molding die in the rotation prevention state.
従って、前記成形品を成形型外へ突き出す過程で、該
成形品の歯車状部の外周面の歯状凹凸と固定型の内周面
の歯状凹凸との周方向位相は常に合致することとなって
上述の両歯状凹凸が干渉すくことがなくなり、成形品の
突出しが不可能になったり、或いは成形品の歯車状部に
疵が付いたりするという問題が生じなくなる。その結
果、製造対象の従動ロールが前述したように複雑な形状
のものであっても、該従動ロールを、その歯車状部を疵
付けることなく確実に製造することができることとな
る。Therefore, in the process of ejecting the molded product out of the molding die, the circumferential phase of the tooth-shaped irregularities on the outer peripheral surface of the gear-shaped portion of the molded product and the tooth-shaped irregularities on the inner peripheral surface of the fixed die always match. As a result, the above-mentioned tooth-like irregularities do not interfere with each other, and the problem that the molded product cannot be projected or that the gear-shaped portion of the molded product is flawed does not occur. As a result, even if the driven roll to be manufactured has a complicated shape as described above, it is possible to reliably manufacture the driven roll without scratching the gear-shaped portion thereof.
以下、本発明の実施例を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
製造対象としなる従動ロール(5)は、第1図及び第
2図に示す如く、インクリボンに外周面が当接させられ
る3個の歯車状部(5a)と、該3個の歯車状部(5a)の
中間2箇所に位置し、インクリボンには当接しないよう
に前記歯車状部(5a)よりも縮径され、しかも幅寸法が
前記歯車状部(5a)のそれよりも長く設定された縮径部
(5b)との組合せからなっている。そして該従動ロール
(5)にはその軽量化等のために中央部に軸方向へ延在
する貫通孔(5c)が設けられているが、本実施例におい
ては、本発明方法に係る回動阻止手段(A)が適用でき
るようにその孔形状をD字状に設定することとする。As shown in FIGS. 1 and 2, the driven roll (5) to be manufactured has three gear-shaped portions (5a) whose outer peripheral surface is brought into contact with the ink ribbon, and the three gear-shaped portions. It is located at two places in the middle of (5a) and has a diameter smaller than that of the gear-like portion (5a) so as not to contact the ink ribbon, and the width dimension is set longer than that of the gear-like portion (5a). It consists of a combination with the reduced diameter part (5b). Further, the driven roll (5) is provided with a through hole (5c) extending in the axial direction at the central portion in order to reduce its weight and the like, but in the present embodiment, the rotation according to the method of the present invention is performed. The hole shape is set to be D-shaped so that the blocking means (A) can be applied.
第3図(イ),(ロ)は上述の従動ロール(5)を射
出成形によって製造する主要過程を示すものであるが、
図示の如く、射出成形を行うのに用いる装置の成形型
(21)は、第9図及び第10図において説明したのと同様
の固定型(21a)及び移動型(21b)を備えると共に、射
出成形時に前記貫通孔(5c)の孔周面を形成するために
前記成形型(21)内に配置され且つD字状の断面を有す
る棒状体からなるマンドレル(23)を備えており、該マ
ンドレル(23)が前記回動阻止手段(A)となるように
なっている。そして該成形型(21)にて成形される成形
品(51)を成形型(21)外へ突き出すのに用いる突出し
部材(22)には、その中央部に前記マンドレル(23)を
挿通させ得る貫通孔(22a)が設けられている。3 (a) and 3 (b) show the main steps of manufacturing the driven roll (5) by injection molding.
As shown in the figure, the molding die (21) of the apparatus used for performing the injection molding includes the fixed die (21a) and the movable die (21b) similar to those described with reference to FIGS. The mandrel (23), which is a rod-shaped body having a D-shaped cross section, is disposed in the molding die (21) to form a hole circumferential surface of the through hole (5c) during molding. (23) serves as the rotation preventing means (A). Then, the mandrel (23) can be inserted through the central portion of the protruding member (22) used for protruding the molded product (51) molded by the molding mold (21) to the outside of the molding mold (21). A through hole (22a) is provided.
かかる成形型(21)を用いて前記形状の従動ロール
(5)の成形品(51)を成形した後、これを成形型(2
1)外へ突き出す場合には、第3図(イ)に示す如く移
動型(21b)を相互離隔方向へ移動させて該移動型(21
b)と成形品(51)とが係わり合った状態を解除し、然
る後に突出し部材(22)を用いて成形品(51)を第3図
(ロ)に示す如く突き出すことにより、該成形品(51)
を成形型(21)外へ取り出すわけであるが、その突出し
過程において、前記成形品(51)は、前記回動阻止手段
(A)としてのマンドレル(23)によって成形型(21)
の成形面にてガイドされずともその周方向への回動が阻
止され、その回動阻止状態のまま成形型(21)外へ突き
出されることとなる。After the molded product (51) of the driven roll (5) having the above-mentioned shape is molded using the molding mold (21), it is molded into the molding mold (2
1) When projecting to the outside, move the movable die (21b) in the direction away from each other as shown in FIG.
b) and the molded product (51) are released from the engaged state, and then the molded product (51) is ejected using the projecting member (22) as shown in FIG. Articles (51)
The molded product (51) is taken out of the molding die (21) by the mandrel (23) as the rotation preventing means (A) in the projecting process.
Even if it is not guided by the molding surface, its rotation in the circumferential direction is blocked, and it is projected to the outside of the molding die (21) in the rotation blocked state.
なお、上述の実施例においては、前記マンドレル(2
3)の断面形状をD字状に設定したが、その形状は非円
形であればよく、例えば三角形や四角形や楕円形等、種
々の実施例が考えられる。In the above embodiment, the mandrel (2
Although the cross-sectional shape of 3) is set to be D-shaped, the shape may be a non-circular shape, and various examples such as a triangle, a quadrangle, and an ellipse can be considered.
また、前記成形品(51)には断面が非円形状の貫通孔
(5c)が設けられることとなるが、該貫通孔(5c)を円
形断面の孔とする必要がある場合は、例えば、射出成形
後の前記成形品(51)にボーリング加工を施せばよい。Further, the molded product (51) will be provided with a through hole (5c) having a non-circular cross section. If the through hole (5c) needs to have a circular cross section, for example, Boring may be performed on the molded product (51) after injection molding.
製造対象となる従動ロール(5)が第4図及び第5図
に示すように中実である場合には、以下に述べるような
本発明方法が考えられる。When the driven roll (5) to be manufactured is solid as shown in FIGS. 4 and 5, the method of the present invention as described below can be considered.
即ち、前記従動ロール(5)の射出成形品(51)に
は、その突出し部材(22)と当接すべき面に、該成形品
(51)を突出し部材(22)にて押圧して突き出すときに
成形品(51)と突出し部材(22)の両者を周方向へすべ
らせることなく係わり合わせるための係合部(5d)を本
発明に係る回動阻止手段(A)として設けておく。該係
合部(5d)としては、具体例を挙げれば、前記成形品
(51)の突出し部材(22)と当接すべき面にD字状凹部
が凹成された突起部を形成したものが考えられる。そし
て該係合部(5d)は射出成形時に成形面の一部となる突
出し部材(22)端面を前記突起部に見合う形状に構成し
ておくことで容易に形成できる。That is, in the injection-molded product (51) of the driven roll (5), the molded product (51) is pushed by the projecting member (22) to the surface to be in contact with the projecting member (22). Occasionally, an engaging portion (5d) for engaging both the molded product (51) and the protruding member (22) without sliding in the circumferential direction is provided as the rotation preventing means (A) according to the present invention. As a specific example of the engaging portion (5d), a protrusion having a D-shaped recess is formed on the surface of the molded product (51) to be in contact with the protruding member (22). Can be considered. The engaging portion (5d) can be easily formed by forming the end surface of the protruding member (22), which is a part of the molding surface during injection molding, into a shape matching the protruding portion.
第6図(イ),(ロ)は上述の従動ロール(5)の射
出成形品(51)を得る主要過程を示すものであるが、図
示の如く、射出成形を行うのに用いる装置の成形型(2
1)は、第9図及び第10図において説明したのと同様の
固定型(21a)及び移動型(21b)を備えている。そして
射出成形後に第6図(イ)に示す如く移動型(21b)を
相互離隔方向へ移動させて該移動型(21b)と成形品(5
1)とが係わり合った状態を解除し、然る後に突出し部
材(22)を用いて成形品(51)を成形型(21)外へ取り
出すわけであるが、その突出し過程において、前記成形
品(51)は、前記回動阻止手段(A)としての係合部
(5d)によって成形型(21)の成形面にてガイドされず
ともその周方向への回動が阻止され、その回動阻止状態
のまま成形型(21)外へ突き出されることとなる。FIGS. 6 (a) and 6 (b) show the main steps of obtaining the injection-molded product (51) of the driven roll (5) described above, but as shown in the figure, the molding of the apparatus used for injection molding is performed. Type (2
1) includes a fixed mold (21a) and a movable mold (21b) similar to those described in FIGS. 9 and 10. After the injection molding, the movable die (21b) is moved in the direction away from each other as shown in FIG. 6 (a) so that the movable die (21b) and the molded product (5
The molded product (51) is taken out of the molding die (21) by using the projecting member (22) after releasing the state in which it is engaged with 1). In the projecting process, the molded product is removed. The rotation preventing means (51) is prevented from rotating in the circumferential direction by the engaging portion (5d) serving as the rotation preventing means (A) even if it is not guided by the molding surface of the molding die (21). It will be ejected outside the molding die (21) in the blocked state.
なお、上述の実施例においては、前記係合部(5d)は
突起部にD字状の凹部を形成したものであったが、その
凹部形状は非円形であればよく、例えば三角形や四角形
や楕円形等、種々の実施例が考えられる。In the above-mentioned embodiment, the engaging portion (5d) has a D-shaped recess formed in the protrusion, but the recess may have a non-circular shape, such as a triangle or a quadrangle. Various embodiments such as an elliptical shape are possible.
また、前記成形品(51)の一端面には係合部(5d)と
して機能する突起部が設けられることとなるが、該突起
部(4d)が最終的に存在しない方がよい場合は、例え
ば、射出成形後にこれを切削加工にて除去すればよい。In addition, a protrusion functioning as an engaging portion (5d) is provided on one end surface of the molded product (51), but when it is better that the protrusion (4d) does not finally exist, For example, this may be removed by cutting after injection molding.
なお、上述のいずれの実施例においても、製造される
従動ロール(5)は歯車状部(5a)を3個備えるもので
あったが、歯車状部(5a)を2個又は4個以上備えるも
のであっても本発明方法が適用され得るのはいうまでも
ない。In each of the above-described examples, the manufactured driven roll (5) was provided with three gear-shaped portions (5a), but two or more gear-shaped portions (5a) were provided. It goes without saying that the method of the present invention can be applied even if it is one.
尚、特許請求の範囲の項に図面との対照を便利にする
為に符号を記すが、該記入により本発明は添付図面にて
示される方法に限定されるものではない。It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the method shown in the accompanying drawings by the entry.
第1図は本発明方法によって製造される従動ロールの一
例を示す縦断面図、第2図はその底面図、第3図
(イ),(ロ)は前記従動ロールを本発明方法によって
製造するときの主要過程を示す説明図、第4図は本発明
方法によって製造される従動ロールの他例を示す縦断面
図、第5図はその底面図、第6図(イ),(ロ)は前記
従動ロールを本発明方法によって製造するときの主要過
程を示す説明図、第7図は前記従動ロールを内部に装備
するインクリボンカートリッジの横断面図、第8図は前
記従動ロールの装備部分を示す分解斜視図、第9図
(イ),(ロ),(ハ)及び第10図は従来の従動ロール
製造方法の主要過程を示す説明図である。 (3)……リボン収納部、(4)……駆動ロール、
(5)……従動ロール、(5a)……歯車状部、(5b)…
…縮径部、(5c)……貫通孔、(5d)……係合部、(2
1)……成形型、(22)……突出し部材、(23)……マ
ンドレル、(51)……成形品、(A)……回動阻止手
段、(R)……インクリボン。FIG. 1 is a longitudinal sectional view showing an example of a driven roll manufactured by the method of the present invention, FIG. 2 is a bottom view thereof, and FIGS. 3 (a) and 3 (b) show the driven roll manufactured by the method of the present invention. FIG. 4 is a longitudinal sectional view showing another example of the driven roll manufactured by the method of the present invention, FIG. 5 is a bottom view thereof, and FIGS. 6 (a) and 6 (b) are FIG. 7 is an explanatory view showing a main process of manufacturing the driven roll by the method of the present invention, FIG. 7 is a cross-sectional view of an ink ribbon cartridge in which the driven roll is mounted, and FIG. 8 is a mounting portion of the driven roll. The exploded perspective view, FIGS. 9 (a), 9 (b), 9 (c), and 10 are explanatory views showing the main steps of the conventional driven roll manufacturing method. (3) ...... Ribbon storage part, (4) ...... Drive roll,
(5) …… Driven roll, (5a) …… Gear-shaped part, (5b)…
… Reduced diameter part, (5c) …… Through hole, (5d) …… Engagement part, (2
1) ... Mold, (22) ... Projecting member, (23) ... Mandrel, (51) ... Molded product, (A) ... Rotation preventing means, (R) ... Ink ribbon.
Claims (3)
協同して挾持しつつ該インクリボン(R)をリボン収納
部(3)側へ引き込むために、該インクリボン(R)に
外周面が当接させられる複数の歯車状部(5a)と、 該複数の歯車状部(5a)の中間に位置し、前記インクリ
ボン(R)には当接しないように前記歯車状部(5a)よ
りも縮径され、しかも幅寸法が前記歯車状部(5a)のそ
れより長く設定された縮径部(5b)との組合せから構成
された従動ロール(5)を、 射出成形装置の成形型(21)内にて成形した後、その成
形品(51)を前記前記成形型(21)から取り出すべく前
記成形型(21)の前記縮径部(5b)に相応する部分を局
部的に拡径させて型開きを行った上で、前記成形型(2
1)の軸方向へ移動自在な突出し部材(22)を移動させ
て前記成形品(51)の端面を押圧しこれを前記成形型
(21)外へ突き出して製造する方法において、 前記射出成形装置に、突出し部材(22)にて前記成形品
(51)が突き出される過程で前記成形品(51)の周方向
への回動を阻止する回動阻止手段(A)を前記成形型
(21)の歯状凹凸成形面以外に予め設けておき、 該回動阻止手段(A)を用いて前記成形品(51)の周方
向への回動を阻止しつつ該成形品(51)を前記成形型
(21)外へ突き出すことを特徴とするインクリボンカー
トリッジの従動ロールの製造方法。1. An outer circumference of the ink ribbon (R) for pulling the ink ribbon (R) toward the ribbon storage section (3) while holding the ink ribbon (R) in cooperation with a drive roll (4). A plurality of gear-like portions (5a) whose surfaces are brought into contact with each other, and the gear-like portions (5a) which are positioned in the middle of the plurality of gear-like portions (5a) so as not to come into contact with the ink ribbon (R). ), And a driven roll (5) composed of a reduced diameter portion (5b) whose width dimension is set to be longer than that of the gear-shaped portion (5a). After molding in the mold (21), a portion corresponding to the reduced diameter portion (5b) of the molding die (21) is locally localized so that the molded product (51) can be taken out from the molding die (21). After expanding the diameter and opening the mold, the mold (2
(1) A method of manufacturing by ejecting the end surface of the molded product (51) by moving an axially movable protruding member (22) and projecting the end surface of the molded product (51) out of the molding die (21). Further, a rotation preventing means (A) for preventing rotation of the molded product (51) in the circumferential direction while the molded product (51) is projected by the projecting member (22) is provided in the molding die (21). ) Is provided in advance on a surface other than the tooth-shaped irregularity molding surface, and the rotation preventing means (A) is used to prevent the molding (51) from rotating in the circumferential direction. A method for manufacturing a driven roll of an ink ribbon cartridge, which comprises protruding the molding die (21) to the outside.
動ロール(5)を製造対象とするインクリボンカートリ
ッジの従動ロールの製造方法であって、 前記回動阻止手段(A)は、射出成形時に前記貫通孔
(5c)の孔周面を形成するために前記成形型(21)内に
配置され、且つ、非円形断面を有する棒状体からなるマ
ンドレル(23)であり、 該マンドレル(23)によって前記成形品(51)の内周面
がガイドされつつ該成形品(51)が突出し部材(22)に
て突き出されることにより、該成形品(51)が突き出さ
れる過程でも、該成形品(51)の周方向への回動が阻止
されるようになる請求項1記載のインクリボンカートリ
ッジの従動ロールの製造方法。2. A method of manufacturing a driven roll of an ink ribbon cartridge, the method of manufacturing a driven roll (5) having a through hole (5c) extending in the axial direction, wherein the rotation preventing means (A) is A mandrel (23), which is arranged in the molding die (21) to form a hole peripheral surface of the through hole (5c) at the time of injection molding and is made of a rod-shaped body having a non-circular cross section, Even when the molded product (51) is projected by the projecting member (22) while the inner peripheral surface of the molded product (51) is guided by the (23), the molded product (51) is also projected. The method for producing a driven roll of an ink ribbon cartridge according to claim 1, wherein the molded product (51) is prevented from rotating in the circumferential direction.
インクリボンカートリッジの従動ロールの製造方法であ
って、 前記回動阻止手段(A)は、突出し部材(22)と前記成
形品(51)との両者が当接し合う当接部に、前記両者を
周方向へすべらせることなく係わり合わせるために設け
られた係合部(5b)であり、 該係合部(5d)を介して前記両者を係わり合わせつつ前
記成形品(51)を突出し部材(22)に突き出すことによ
り、該成形品(51)が突き出される過程でも、該成形品
(51)の周方向への回動が阻止されるようになる請求項
1記載のインクリボンカートリッジの従動ロールの製造
方法。3. A method for manufacturing a driven roll of an ink ribbon cartridge, wherein a solid driven roll (5) is manufactured, wherein the rotation preventing means (A) comprises a protrusion member (22) and the molded product. An engaging portion (5b) provided for engaging with the abutting portion where (51) abuts each other without slipping the both in the circumferential direction, and the engaging portion (5d) is interposed. By projecting the molded product (51) into the projecting member (22) while engaging the both, the rotational movement of the molded product (51) in the circumferential direction even in the process of projecting the molded product (51). 2. The method for manufacturing a driven roll of an ink ribbon cartridge according to claim 1, wherein
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33311988A JP2693985B2 (en) | 1988-12-27 | 1988-12-27 | Method for manufacturing driven roll of ink ribbon cartridge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33311988A JP2693985B2 (en) | 1988-12-27 | 1988-12-27 | Method for manufacturing driven roll of ink ribbon cartridge |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02175116A JPH02175116A (en) | 1990-07-06 |
JP2693985B2 true JP2693985B2 (en) | 1997-12-24 |
Family
ID=18262502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33311988A Expired - Lifetime JP2693985B2 (en) | 1988-12-27 | 1988-12-27 | Method for manufacturing driven roll of ink ribbon cartridge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2693985B2 (en) |
-
1988
- 1988-12-27 JP JP33311988A patent/JP2693985B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02175116A (en) | 1990-07-06 |
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