JP2001150498A - Method for molding article having toothed part on surface, method for molding gear, double helical gear as well as method and apparatus for molding double helical gear - Google Patents
Method for molding article having toothed part on surface, method for molding gear, double helical gear as well as method and apparatus for molding double helical gearInfo
- Publication number
- JP2001150498A JP2001150498A JP33432299A JP33432299A JP2001150498A JP 2001150498 A JP2001150498 A JP 2001150498A JP 33432299 A JP33432299 A JP 33432299A JP 33432299 A JP33432299 A JP 33432299A JP 2001150498 A JP2001150498 A JP 2001150498A
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- molding
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明はやまば歯車等の、そ
の表面に螺合するための歯部を備える成形品の成形に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the formation of a molded product such as a helical gear or the like having a tooth portion for screwing to a surface thereof.
【0002】特に、やまば歯車の成形に好適な成形方法
及び成形装置に関する。In particular, the present invention relates to a forming method and a forming apparatus suitable for forming a bevel gear.
【0003】更に、本発明は、やまば歯車を駆動系に使
用した場合、バックラッシュが不適切なために、歯底あ
たり等により駆動力伝達中に生じる振動、騒音又は、歯
車の異常摩耗を防ぐ手段を備えたやまば歯車のが車機
構、及び、その成形方法、並びに、成形装置に関する。[0003] Further, the present invention, when a helical gear is used in the drive system, the vibration, noise, or abnormal wear of the gear generated during the transmission of the driving force due to the contact with the bottom of the tooth due to inappropriate backlash. The present invention relates to a wheel mechanism having a preventive means, a wheel mechanism, a molding method thereof, and a molding apparatus.
【0004】又、一対のやまば歯車を噛み合わせる際
に、歯車のスラスト位置に自由度を与えるやまば歯車の
歯車機構に関する。[0004] Further, the present invention relates to a gear mechanism of a helical gear that gives a degree of freedom to a thrust position of the gear when meshing a pair of helical gears.
【0005】[0005]
【従来の技術】やまば歯車の製造方法及び製造装置の技
術に関する先行資料として、特許番号第2879336
号公報がある。2. Description of the Related Art Japanese Patent No. 2879336 discloses a prior art relating to a method of manufacturing a bevel gear and a technology of a manufacturing apparatus.
There is an official gazette.
【0006】該特許公報にはやまば歯車を製造する方法
において、歯車の2つの半部に対応する2つのモールド
半部で構成され、これらのモールド半部はそれぞれ、歯
車の1つの半部に対応するモールドキャビテイと、内側
合せ面を有し、この内側合せ面は他方のモールド半部の
内側合せ面と密封係合し、それら両モールド半部の2つ
の合せ面は歯車の中央平面に対応するように構成されて
いる。The patent publication discloses a method for manufacturing a helical gear, comprising two mold halves corresponding to the two halves of the gear, each of these mold halves being associated with one half of the gear. It has a corresponding mold cavity and an inner mating surface, which sealingly engages the inner mating surface of the other mold half, the two mating surfaces of both mold halves corresponding to the central plane of the gear. It is configured to be.
【0007】又、該公報の構成のモールド構成は成形品
の引き出し段階において、歯車が回転するように構成さ
れている。[0007] Further, the mold configuration of this publication is configured such that the gears rotate at the stage of drawing out the molded product.
【0008】[0008]
【発明が解決しようとする課題】やまば歯車は相手の歯
車と噛み合う歯部は相対的に反対向きのねじれ角度を成
し、それにより、ギアトレイン構成の駆動力伝達時のス
ラスト方向の推力を打ち消す機能を有する特性を持つも
のである。In the case of the helical gear, the teeth meshing with the mating gear have a relatively opposite twist angle, so that the thrust in the thrust direction at the time of transmitting the driving force of the gear train structure is reduced. It has the property of canceling out.
【0009】やまば歯車のように、歯部が、その歯部中
央部位置から歯部ねじれ角度が互いに角度向きを相反す
る方向に向いている構成を特徴としており、樹脂材料な
どの成形材料で成形加工する場合に、相反する方向に向
いているねじれ角度の歯部の相互の位相合せが難しくな
る。[0009] Like a bevel gear, the tooth portion is characterized in that the tooth portion twist angles are directed in directions opposite to each other from the center portion of the tooth portion, and are formed of a molding material such as a resin material. In the case of molding, it is difficult to match the phases of the teeth having the twist angles that are opposite to each other.
【0010】相反する方向に向いているねじれ角度の歯
部の位相が製造上でずれると、やまば歯車としての歯車
機能が成り立たなくなる。[0010] If the phases of the tooth portions of the torsion angles that are opposite to each other are shifted in manufacturing, the gear function as the helical gear cannot be realized.
【0011】やまば歯車は各種駆動機械に採用され、又
その駆動力の伝達特性から画像形成装置の定着ユニット
への適用も考えられる。The helical gear is employed in various driving machines, and its application to a fixing unit of an image forming apparatus can be considered from the transmission characteristic of the driving force.
【0012】複写機、レーザービーム プリンター、フ
ァクシミリ装置、等の画像形成装置に組み込まれる定着
装置に関して検討すると、図1、2は前記定着装置の要
部構成の1例を示し、図において、符号100は加圧ロ
ーラ、102は面形状のヒータ、104は円筒形状に形
成された薄膜フイルムである。Considering a fixing device incorporated in an image forming apparatus such as a copying machine, a laser beam printer, a facsimile machine, etc., FIGS. 1 and 2 show an example of a main configuration of the fixing device. Is a pressure roller, 102 is a planar heater, and 104 is a thin film formed in a cylindrical shape.
【0013】加圧ローラ100はアルミニュム製の芯金
100Aの周囲にシリコーンスポンジ(ゴム)層100
Bをローラ状に成形し、その外周面をPPAチューブ1
00Cで覆った構成であり、表面は弾性に優れている。The pressure roller 100 has a silicone sponge (rubber) layer 100 around an aluminum core 100A.
B is formed into a roller shape, and its outer peripheral surface is a PPA tube 1
The structure is covered with 00C, and the surface is excellent in elasticity.
【0014】面状ヒータ102はヒータホルダー106
に接着固定され、ヒータホルダー106はばね部材10
8により前記薄膜フイルム104を間に挟んだ状態で加
圧ローラ100に平行に配置されて圧接している。The planar heater 102 has a heater holder 106.
The heater holder 106 is fixed to the spring member 10.
8, the thin film 104 is disposed in parallel with the pressure roller 100 with the thin film 104 interposed therebetween and pressed against the pressure roller 100.
【0015】面状ヒータ102を含むヒータホルダー1
06を加圧ローラ100に加圧すると、加圧ローラ10
0の前記シリコーンスポンジ層100Bが弾性変形し、
加圧ローラ100と薄膜フイルム104の間で、ある幅
を持ったニップ部110を形成する。Heater holder 1 including planar heater 102
06 to the pressure roller 100, the pressure roller 10
0 of the silicone sponge layer 100B is elastically deformed,
A nip 110 having a certain width is formed between the pressure roller 100 and the thin film 104.
【0016】前記加圧ローラ100の芯金100Aには
従動歯車112が取り付けられており、駆動力伝達の駆
動側歯車114と噛み合っている。A driven gear 112 is attached to the metal core 100A of the pressure roller 100, and meshes with a driving gear 114 for transmitting a driving force.
【0017】前記定着装置は前記面状ヒータ102に通
電、加熱し、画像形成装置の画像形成部においてトナー
像を転写された紙等の記録媒体を前記ニップ部110に
通過させることで熱と圧力により記録媒体上のトナー像
を定着する。The fixing device energizes and heats the planar heater 102 to pass a recording medium, such as paper, onto which a toner image has been transferred in the image forming section of the image forming apparatus, through the nip section 110, thereby generating heat and pressure. To fix the toner image on the recording medium.
【0018】上記構成の定着装置において、薄膜フイル
ム104は前記ニップ部110を通過する記録媒体を介
して摩擦力により回転駆動され、その回転速度はニップ
部を通過する際の記録媒体の速度とはぼ等速である。In the fixing device having the above-described structure, the thin film 104 is rotationally driven by frictional force via the recording medium passing through the nip 110, and the rotation speed of the thin film 104 is equal to the speed of the recording medium passing through the nip. The speed is constant.
【0019】前記加圧ローラ100は前記した駆動歯車
と従動歯車の噛み合い周波数により微少に速度変動し、
その振動は記録媒体に伝播する。The pressure roller 100 slightly fluctuates in speed according to the meshing frequency of the driving gear and the driven gear.
The vibration propagates to the recording medium.
【0020】また、前記の定着装置で発生した振動は画
像形成装置の転写装置側に伝播することとなり、従動歯
車の噛み合い周波数の転写ずれを生ずる原因になる。Further, the vibration generated in the fixing device propagates to the transfer device side of the image forming apparatus, which causes a transfer deviation of the meshing frequency of the driven gear.
【0021】はすば歯車や、やまば歯車を用いると歯車
の噛み合い率を大きくすることが可能であり、定着装置
で発生する振動を低減できる。When a helical gear or a helical gear is used, the meshing ratio of the gears can be increased, and the vibration generated in the fixing device can be reduced.
【0022】又、やまば歯車を用いた場合、駆動の伝達
によりスラスト力が発生しないため加圧ローラにスラス
ト力が加わるのを防ぐことができる。Further, in the case where the helical gear is used, no thrust force is generated by the transmission of the driving force, so that it is possible to prevent the thrust force from being applied to the pressure roller.
【0023】更に、やまば歯車のように、歯部のねじれ
方向が異なる2つの半部の接合面に隙間(間隔部)が無
い歯部同士を噛み合わせる場合には、夫々の歯車の接合
面が厳密に一致するように2つの歯部のスラスト方向の
位置を決めないと、振動、騒音発生、歯車の異常摩耗に
よる不具合等の問題となる。Further, in the case where the teeth having no gap (interval) are engaged with the joining surfaces of the two halves having different torsion directions of the teeth, such as a helical gear, the joining surfaces of the respective gears are engaged. If the positions of the two teeth in the thrust direction are not determined so as to exactly match each other, problems such as vibration, noise generation, and malfunction due to abnormal wear of the gears may occur.
【0024】本発明の1つであるやまば歯車112、1
14は図2及び図3、4に詳述図説したようにやまばの
歯車と歯車の間に歯部間の距離を開けて、後述する係合
部(200C,300C)を形成してある。The bevel gears 112, 1 according to one embodiment of the present invention
As shown in FIGS. 2, 3 and 4, reference numeral 14 is used to form engaging portions (200C, 300C) to be described later with a distance between the teeth between the bevel gears and the gears.
【0025】このような構成にすることにより、上記の
問題を解決することが可能である。このようなやまば歯
車を樹脂材料で射出成形するためには該係合部を成形す
るキャビテイ構成と、やまば歯車を成形用の金型部材内
で成形した後の、離型操作の工夫が必要となる。With this configuration, the above problem can be solved. In order to injection-mold such a bevel gear with a resin material, it is necessary to devise a cavity configuration for molding the engaging portion and a releasing operation after the bevel gear is molded in a molding die member. Becomes
【0026】前記の先行技術としての特許登録番号第2
879336号に記載されるヘリングボーン歯車の成形
方法による場合、モールドは歯車の2つの半部に対応す
る2つのモールド半部で構成され、これらのモールド半
部は夫々、歯車の1つの半部に対応するモールドキャビ
テイと、内側合せ面を有し、この内側合せ面は、他方の
モールド半部の内側合せ面と密封係合することで、2つ
のモールド半部で成形されるそれぞれのやまば歯車の相
互の歯車の歯部の位相の精度を保証しようとするもので
ある。The above-mentioned prior art patent registration number 2
In the case of the method of molding a herringbone gear described in US Pat. No. 879,336, the mold consists of two mold halves corresponding to the two halves of the gear, each of which is provided on one half of the gear. A respective bevel gear formed in two mold halves, having a corresponding mold cavity and an inner mating surface, said inner mating surface being in sealing engagement with the inner mating surface of the other mold half; It is intended to guarantee the accuracy of the phase of the tooth portions of the mutual gears.
【0027】しかしながら、やまば歯車形状の成形の場
合、歯車の各やまばの歯部間の位相精度を正確に成形す
るのはやまばの歯部を成形する金型部材の各部組み立て
上の精度をかなり高い精度に保証する必要がある。However, in the case of the formation of the helical gear, the phase accuracy between the teeth of the helical gear is accurately formed only by the accuracy in assembling the mold member for forming the helical teeth. Must be guaranteed to a fairly high accuracy.
【0028】更に、上記本発明の適用しようとするやま
ばの歯部の間に係合部や、軸部を備えた形状のやまば歯
車の成形にあっては、成形方法及び成形装置の工夫が必
要である。Further, in forming a bevel gear having a shape having an engagement portion and a shaft portion between the teeth of the bezel to which the present invention is to be applied, a method and a device for the forming device are devised. is necessary.
【0029】前記先行資料に開示の成形方法の場合、成
形された成形品のやまば歯車は離型操作時に、成形品の
歯車を回転動作させる構成であるが、この方法の場合、
金型部材と成形品との間の物理的抵抗が大きくなり成形
品の変形を招く恐れがある。In the case of the molding method disclosed in the above-mentioned prior document, the helical gear of the molded article is configured to rotate the gear of the molded article at the time of releasing operation.
There is a possibility that the physical resistance between the mold member and the molded product is increased and the molded product is deformed.
【0030】特に、成形した歯部形状の変形作用の影響
がある。In particular, there is an effect of the deformation action of the formed tooth shape.
【0031】更に、離型操作における、金型部材の開き
と同時にモールド半部の可動側から歯車を離型する際
に、金型機構の構成部材間に機構的遊び(アソビ)があ
ると、型開きによる歯車の回転動作とエジェクター動作
の時間差が生じて、成形品の歯部が変形する恐れがあ
る。Further, when the gear is released from the movable side of the mold half simultaneously with the opening of the mold member in the release operation, there is mechanical play (asobi) between the components of the mold mechanism. There is a time difference between the rotation operation of the gear and the ejector operation due to the opening of the mold, and the teeth of the molded product may be deformed.
【0032】本発明の課題の1つは、上記した画像形成
装置の定着装置の駆動側と従動側の歯車の振動に起因す
る転写ずれ等の画像精度に影響を及ぼすことのない、
又、駆動伝達によるスラスト力の発生の抑制歯車及び、
歯車機構、更に、該歯車の製造方法を提案することにあ
る。One of the objects of the present invention is to provide an image forming apparatus which does not affect image accuracy such as transfer deviation caused by vibration of gears on a driving side and a driven side of a fixing device of the image forming apparatus.
Also, a gear for suppressing the generation of thrust force by drive transmission, and
It is to propose a gear mechanism and a method of manufacturing the gear.
【0033】本発明の課題は上記のような、歯部の中央
部位置にバックラッシュ保証機能部(係合部)を備える
やまば歯車の成形に好適な成形方法及び成形装置を提案
することにある。An object of the present invention is to propose a forming method and a forming apparatus suitable for forming a helical gear provided with a backlash assurance function section (engaging section) at a central position of the tooth section as described above. is there.
【0034】更に本発明は上記したような理由から画像
形成装置の構成ユニットに好適なやまば歯車の構成及
び、成形方法、並びに、成形装置に関する。Further, the present invention relates to a configuration of a bevel gear suitable for a constituent unit of an image forming apparatus, a molding method, and a molding apparatus for the reasons described above.
【0035】[0035]
【課題を解決するための手段】本発明は上記課題解決の
ために、表面に歯部を有する成形品の成形方法であっ
て、成形品本体部を転写する固定側金型部材と可動側金
型部材及び前記歯部を転写する一対の回転可能な駒部材
から前記成形品成形用のキャビテイを形成し、前記キャ
ビテイ内への樹脂材料の射出、冷却工程を経て、前記可
動側金型部材の開成に伴い、前記回転駒部材の回転操作
により、前記固定側金型部材からの分離を行い、続い
て、可動側金型部材から前記回転駒部材の回転操作によ
り離型操作を行うようにして成形することを特徴とした
表面に歯部を有する成形品の成形方法を提案する。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method for molding a molded article having teeth on its surface, comprising a fixed mold member for transferring a molded article main body and a movable mold. Forming a cavity for molding the molded article from a pair of rotatable piece members that transfer the mold member and the tooth portion, injecting a resin material into the cavity, and cooling, to form the movable-side mold member. With the opening, the rotation of the rotating piece member is separated from the fixed mold member, and subsequently, the mold release operation is performed from the movable mold member by rotating the rotating piece member. A molding method of a molded article having a tooth portion on a surface characterized by molding is proposed.
【0036】上記提案による発明の成形方法において
は、成形品のやまば歯車は成形金型部材内で、非回転状
態に保持される。In the molding method of the invention proposed above, the helical gear of the molded product is held in a non-rotating state in the molding die member.
【0037】更に、画像形成装置のユニットに使用する
歯車として、やまば歯車の歯部中央部にアンダーカット
部を成形したことを特徴としたやまば歯車を提案する。Further, as a gear used in a unit of the image forming apparatus, a bevel gear characterized in that an undercut portion is formed at the center of a tooth portion of the bevel gear is proposed.
【0038】更に、本発明は歯部中央部にアンダーカッ
ト部を形成したやまば歯車の成形方法であって、固定及
び可動金型部材上に配置した前記歯部を転写する一対の
回転駒部材の間に前記アンダーカット部を成形するため
のスライド部材を設け、前記可動金型部材の開き操作時
に前記スライド部材の移動に連動して前記回転駒部材を
回転操作させて成形品の離型を行うようにして成形する
ことを特徴としたやまば歯車の成形方法の提案により上
記課題の解決を図る。Further, the present invention relates to a method of forming a bevel gear having an undercut portion formed at a central portion of a tooth portion, comprising a pair of rotary piece members for transferring the tooth portion disposed on a fixed and movable mold member. A slide member for forming the undercut portion is provided between the movable mold members, and when the movable mold member is opened, the rotary piece member is rotated in conjunction with the movement of the slide member to release the molded product. The above object is achieved by proposing a method of forming a bevel gear, which is characterized by being formed as described above.
【0039】又、固定側金型部材と可動側金型部材にや
まば歯車を形成するキャビテイを設け、前記やまば歯車
の歯部を転写する一対の回転駒部材を前記各金型部材に
配置し、前記回転駒部材の間に前記やまば歯車の歯部中
央部のアンダーカット部を形成するスライド部材を配置
し、型開き操作時に、前記スライド部材の動きに連動し
て成形した前記やまば歯車を非回転状態で離型操作する
ことを特徴としたやまば歯車の成形方法を提案する。The fixed mold member and the movable mold member are provided with cavities for forming helical gears, and a pair of rotary piece members for transferring the teeth of the helical gears are arranged on each of the mold members. A slide member forming an undercut portion at the center of the tooth portion of the bevel gear is disposed between the rotary piece members, and the mold is formed in conjunction with the movement of the slide member during a mold opening operation. The present invention proposes a method of forming a bevel gear, which is characterized in that a releasing operation is performed in a non-rotating state.
【0040】上記回転駒部材の一方のみの回転操作によ
る態様もある。There is also an embodiment in which only one of the rotating piece members is rotated.
【0041】更に、やまば歯車の歯部を転写するために
歯部中央部で分離した一対の回転駒部材と歯車本体を成
形する固定側及び可動側の金型部材を備え、成形品の離
型操作の際に、成形品を可動側金型部材に保持させ移動
させるための前記回転駒部材を回転駆動させる手段を備
えたことを特徴した成形装置の提案により上記やまば歯
車の製造を提案する。Further, a pair of rotating piece members separated at the center of the tooth portion for transferring the tooth portion of the helical gear and fixed-side and movable-side mold members for forming the gear body are provided. In the case of a mold operation, the manufacture of the above-mentioned helical gears is proposed by a proposal of a molding apparatus characterized by comprising means for rotating and driving the rotary piece member for holding and moving a molded product on a movable mold member during a mold operation. I do.
【0042】本発明の1つは、表面に歯部を有する成形
品の成形装置であって、固定側金型部材と可動側金型部
材に一対の回転駒部材を設け、前記回転駒部材の間に前
記成形品表面にアンダーカット部を形成するスライド部
材を配置したことを特徴とした表面に歯部を有する成形
品の成形装置を提案する。One aspect of the present invention is an apparatus for molding a molded article having a tooth portion on a surface, wherein a pair of rotating piece members are provided on a fixed mold member and a movable mold member, and the rotating piece member is provided with a pair of rotating piece members. A molding device for a molded product having teeth on the surface, characterized in that a slide member for forming an undercut portion on the surface of the molded product is disposed therebetween.
【0043】更に、前記成形装置はやまば歯車を成形す
る成形装置であって、前記一対の回転駒部材の相対位置
を決める位置決め手段を備えていることを特徴とした成
形装置の態様を提案する。Further, the present invention proposes an embodiment of the forming apparatus, wherein the forming apparatus is a forming apparatus for forming a helical gear, and is provided with positioning means for determining a relative position of the pair of rotary pieces. .
【0044】更に、上記態様において、前記成形装置の
前記位置決め手段の位置解除手段を備えたことを特徴と
した成形装置を提案する。Further, there is provided a molding apparatus according to the above aspect, further comprising a position releasing means for the positioning means of the molding apparatus.
【0045】前記可動側金型部材の開き動作に連動して
前記スライド部材を移動操作し、該スライド部材の移動
に応じて成形品を可動側金型部材に保持させて型開き操
作を行うようにしたことを特徴とした成形装置の態様が
ある。The slide member is moved in conjunction with the opening operation of the movable mold member, and the molded product is held by the movable mold member in accordance with the movement of the slide member to perform the mold opening operation. There is an embodiment of a molding apparatus characterized by the following.
【0046】更に、やまば歯車を樹脂材料により成形製
造するためには、固定側及び可動側の金型部材と、やま
ば歯車の歯部中央部分を境目とした両方の歯部の位相を
合わせる必要があるが、本発明の1つは、成形用金型部
材と、前記金型部材とともに前記やまば歯車を成形する
ための歯部転写部を形成したキャビテイを構成する回転
駒部材を有し、前記やまば歯車の歯部中央を境目とした
やまば歯部の相互の歯車部分の位相の位置決めを行う手
段を備えた事を特徴としたやまば歯車の成形装置の提案
により上記課題の解決を図った。Further, in order to form and manufacture the helical gear from a resin material, the phases of the fixed-side and the movable-side mold members and the teeth of the helical gear at the center of the teeth are aligned. Although it is necessary, one of the present invention has a molding die member, and a rotating piece member which forms a cavity in which a tooth portion transfer portion for molding the bevel gear is formed together with the die member. Means for solving the above-mentioned problems are provided by a device for forming a bevel gear, characterized by comprising means for positioning the phase of the mutual gear portion of the bevel tooth at the center of the tooth of the bevel gear. Was planned.
【0047】更に、やまば歯車の相対的歯部を成形する
一対の歯部成形用回転駒部材と、前記歯部成形用回転駒
部材の相対位置を規制する規制部材を有することを特徴
としたやまば歯車の成形装置の提案により上記課題の解
決を図る。Further, a pair of teeth forming rotary piece members for forming relative teeth of the bevel gear and a regulating member for regulating the relative position of the tooth forming rotary piece members are provided. The above-mentioned problem is solved by proposing an apparatus for forming a bevel gear.
【0048】又、上記装置においては前記規制部材は前
記成形するやまば歯車の歯部中央部のアンダーカット部
を成形する部材であることを特徴としたやまば歯車の成
形装置の発明の態様を提案する。In the above apparatus, the regulating member is a member for forming an undercut portion at the center of the tooth portion of the formed helical gear. suggest.
【0049】更に本発明は、駆動側と従動側の一対のや
まば歯車であって、各やまば歯車の中央部に係合部を形
成したことを特徴としたやまば歯車の提案により画像形
成装置の性能の向上に寄与する。The present invention further provides a pair of helical gears on the driving side and the driven side, wherein an engaging portion is formed at the center of each of the helical gears. It contributes to improving the performance of the device.
【0050】更に本発明の前記規制部は前記各やまば歯
車の歯部中央部にアンダーカット部を構成した樹脂材料
による成形加工で製造したことを特徴としたやまば歯車
の態様を提案する。Further, the present invention proposes an embodiment of the bevel gear, wherein the restricting portion is manufactured by molding a resin material having an undercut portion in the center of the tooth portion of each of the bevel gears.
【0051】更に本発明は、一対のやまば歯車であっ
て、該一対のやまば歯車の歯部の噛み合い部以外であっ
て、該一対のやまば歯車が相互に係合する係合部を備え
たことを特徴とした一対のやまば歯車を提案する。Further, the present invention relates to a pair of helical gears, wherein each of the helical gears has an engaging portion other than the meshing portion of the tooth portions of the pair of helical gears. We propose a pair of bevel gears that are equipped with these.
【0052】本発明の1つは、上記した画像形成装置に
使用する駆動/従動機構の歯車機構で発生する振動を防
止する歯車、特に、前記駆動機構によるスラスト力を解
消できるやまば歯車の製造方法及び製造装置を提案し、
画像精度への寄与を図る。One aspect of the present invention is to manufacture a gear for preventing vibration generated by a gear mechanism of a driving / driven mechanism used in the above-described image forming apparatus, and in particular, to manufacture a bevel gear capable of eliminating a thrust force by the driving mechanism. Proposed method and manufacturing equipment,
Contribute to image accuracy.
【0053】[0053]
【発明の実施の形態】第一の実施例 以下に図3乃至図9を参照して本発明の第一の実施例を
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS.
【0054】図3、4は前記の定着装置の駆動機構に採
用するやまば歯車の従動用やまば歯車200と駆動用や
まば歯車300の説明図である。FIGS. 3 and 4 are explanatory diagrams of a driven helical gear 200 and a driving helical gear 300 of the helical gear employed in the driving mechanism of the fixing device.
【0055】図3の従動用やまば歯車200は歯部の傾
斜角度が中心位置から相互に相反する方向に向いた角度
の歯部200A,200Bと該歯部200A,200B
の中間位置に形成したアンダーカット形状の係合部20
0Cと歯車軸部200D等から構成される。The driven helical gear 200 shown in FIG. 3 has teeth 200A, 200B and teeth 200A, 200B whose inclination angles of the teeth are opposite to each other from the center position.
Undercut-shaped engaging portion 20 formed at an intermediate position of
0C and a gear shaft 200D.
【0056】図4の駆動用やまば歯車300は歯部の傾
斜角度が中心位置から相互に相反する方向に向いた角度
の歯部300A,300Bと該歯部300A,300B
の中間位置に形成したアンダーカット形状の係合部30
0Cと歯車軸部300D等から構成される。The driving helical gear 300 shown in FIG. 4 has teeth 300A, 300B and teeth 300A, 300B whose inclination angles of the teeth are opposite to each other from the center position.
Undercut-shaped engaging portion 30 formed at an intermediate position between
0C and a gear shaft 300D.
【0057】各歯部は200Aと300Aが噛み合い、
歯部200Bと300Bが噛み合い、各係合部200C
と300Cが係合する。Each tooth portion is engaged with 200A and 300A,
The tooth portions 200B and 300B mesh with each other, and each engaging portion 200C
And 300C engage.
【0058】係合状態は後述する図16、17、18に
示す。The engaged state is shown in FIGS.
【0059】前記駆動用やまば歯車300の係合部30
0Cは前記従動側のやまば歯車200の係合部200C
と接触係合するように形成されている。The engaging portion 30 of the driving bevel gear 300
0C is an engaging portion 200C of the driven side bevel gear 200.
Is formed so as to be in contact with and engaged with.
【0060】図5乃至図9は前記従動用やまば歯車20
0を樹脂材料で成形製造する場合の成形装置の要部構成
を説明する図面である。FIGS. 5 to 9 show the driven bevel gear 20.
It is a figure explaining main part composition of a molding device when molding and manufacturing 0 with a resin material.
【0061】図5は本発明に係る成形装置の要部の構成
の説明図であり、固定側金型部材1と可動側金型部材2
を閉じた状態を示す。FIG. 5 is an explanatory view of the configuration of the main part of the molding apparatus according to the present invention. The fixed mold member 1 and the movable mold member 2 are shown.
Indicates a closed state.
【0062】図6は図5のA−A方向の要部の断面図を
示す。FIG. 6 is a sectional view of a main part taken along the line AA of FIG.
【0063】図7は図5の型閉じ状態から型を開く状態
の説明図であり、図8は型開き状態のA−A方向断面図
を夫々示す。FIG. 7 is an explanatory view of the state in which the mold is opened from the mold closed state in FIG. 5, and FIG. 8 is a sectional view taken along the line AA in the mold open state.
【0064】図9は本実施例装置の制御装置の構成の説
明図を示す。FIG. 9 is an explanatory diagram of the configuration of the control device of the present embodiment.
【0065】図において、符号4は固定側の金型(駒)
部材1の型保持部材、6はランナーブッシュ保持部材、
8は固定側型板部材、10はランナーである。In the figure, reference numeral 4 denotes a fixed mold (piece).
A mold holding member of member 1, a runner bush holding member 6,
Reference numeral 8 denotes a fixed mold plate member, and reference numeral 10 denotes a runner.
【0066】12は可動側金型(駒)部材2の保持部
材、14は可動側型板部材、16はエジェクタープレー
ト、18はエジェクターピンである。Reference numeral 12 denotes a holding member for the movable mold (piece) member 2, 14 denotes a movable mold plate member, 16 denotes an ejector plate, and 18 denotes an ejector pin.
【0067】符号20,22は本発明の成形装置の特徴
である回転駒部材である。Reference numerals 20 and 22 denote rotating piece members which are features of the molding apparatus of the present invention.
【0068】該回転駒部材20,22は夫々、固定側の
金型部材1と可動側の金型部材2の外周位置側に配置さ
れ、その形状はリング形状であり、該回転駒の外周位置
には回転駒を支持する支持部材24,26が配置されて
いる。The rotating piece members 20 and 22 are respectively disposed on the outer peripheral position side of the fixed mold member 1 and the movable mold member 2 and have a ring shape. Are provided with support members 24 and 26 for supporting the rotating pieces.
【0069】そして、該各回転駒部材20,22は該回
転駒部材と前記支持部材24,26との間に設けた回転
支持部材(ベアリング)28,30により前記固定側金
型部材1及び可動側金型部材との間でそれぞれに回転可
能に支持されている。The rotating piece members 20 and 22 are fixed to the fixed mold member 1 and movable by rotating support members (bearings) 28 and 30 provided between the rotating piece members and the support members 24 and 26, respectively. Each is rotatably supported between the side mold members.
【0070】前記回転駒部材20,22は前記固定側金
型部材1と可動側の金型部材2とで成形品のやまば歯車
を成形するためのキャビテイ空間を形成し、回転駒部材
20,22の該キャビテイ空間に臨む面20A,22A
には歯部が形成され、成形品がやまば歯車の場合、やま
ば歯車の歯形状を形成するように構成してある。前記回
転駒部材20,22の歯部転写面の歯部20A,22A
は夫々の歯部の傾斜方向が前記のやまば歯車200の歯
部(200A,200B)を形成するように構成されて
いる。The rotating piece members 20 and 22 form a cavity space for forming a bevel gear of a molded product by the fixed mold member 1 and the movable mold member 2. Surfaces 20A and 22A facing the cavity space 22
Is formed to form a tooth shape of the helical gear when the molded product is a helical gear. Tooth portions 20A, 22A on the tooth portion transfer surface of the rotating piece members 20, 22
Are configured such that the inclination direction of each tooth portion forms the tooth portion (200A, 200B) of the aforementioned bevel gear 200.
【0071】前記回転駒部材はSKD(ダイス鋼)、各
金型部材はSKH(ハイス鋼)から作られている。The rotating piece member is made of SKD (die steel), and each mold member is made of SKH (high-speed steel).
【0072】符号32,34は成形品のやまば歯車の歯
部の中央位置に形成したアンダーカット形状の前記係合
部200Cを構成するためのスライド部材であり、図5
に示すように、上下2枚の板部材が突き合わさるように
構成され、その金型部材方向(中央部)の先端は成形品
のやまば歯車本体の円筒部分を回避するように半割形状
と成している。Reference numerals 32 and 34 denote slide members for forming the undercut-shaped engaging portion 200C formed at the center of the teeth of the bevel gear of the molded product.
As shown in the figure, the upper and lower two plate members are configured to abut each other, and the tip of the plate member in the direction of the mold member (central portion) is formed into a half-shape so as to avoid the cylindrical portion of the bevel gear body of the molded product. Has formed.
【0073】前記スライド部材32,34は前記回転駒
支持部材24,26の側面24A、26Aに挟み込まれ
るように配置し、アンギュラーピン36,38によって
金型の開き動作に連動して図示上下方向に開閉移動する
ように構成されている。The slide members 32, 34 are arranged so as to be sandwiched between the side surfaces 24A, 26A of the rotary piece support members 24, 26, and are interlocked with the opening operation of the mold by the angular pins 36, 38, so that the slide members 32, 34 It is configured to open and close.
【0074】やまば歯車を本発明のように樹脂材料等の
成形材料で金型内に注入固化して成形するには上記構成
の回転駒部材20,22によりやまば歯車の歯部の形状
を成形し、後述するように前記のアンダーカット部分2
00Cを成形するスライド部材32、34の移動による
成形品の回転規制をしつつ金型開き操作を行う構成を採
用する。In order to inject and solidify the helical gear into a mold with a molding material such as a resin material as in the present invention, the shape of the tooth portion of the helical gear is adjusted by the rotating pieces 20 and 22 having the above-described structure. Molded, and as described below, the undercut portion 2
A configuration is employed in which the mold opening operation is performed while the rotation of the molded product is restricted by the movement of the slide members 32 and 34 for molding 00C.
【0075】やまば歯車の歯部200A,200Bが単
純形状でなく、歯部が(ねじれ)傾斜し、かつ、そのね
じれ方向が、歯部の中央部分を境目として相互に逆方向
の向きを成す、やまば歯車の歯部200A,200Bを
成形する場合、駆動側金型部材による成形部分の相互の
歯部の位相を厳密に規定するための工夫が必要となる。The teeth 200A and 200B of the helical gear are not simple in shape, the teeth are inclined (twisted), and the directions of the twists are opposite to each other with the center of the teeth as a boundary. In the case of forming the tooth portions 200A and 200B of the helical gear, it is necessary to devise a method for strictly defining the phase of the mutual tooth portion of the molded portion formed by the driving mold member.
【0076】そのために、本装置の実施例においては、
成形されたやまば歯車の各歯部の相互の位相決めの手段
を設けてある。Therefore, in the embodiment of the present apparatus,
Means are provided for determining the phase of each tooth of the formed bevel gear.
【0077】本例では該歯部の位相決めは、前記回転駒
部材20,22のピン着脱穴22B,24Bを基準穴と
して位相決め加工され、歯部の成形部20A,22Aの
相互の位置合せを行うことにより実行する。In this embodiment, the phasing of the tooth portions is determined by using the pin mounting holes 22B and 24B of the rotary pieces 20 and 22 as reference holes, and the positioning of the tooth forming portions 20A and 22A relative to each other. Is performed.
【0078】図6により該位置合せ手段を説明する。The positioning means will be described with reference to FIG.
【0079】図6は図5図示A−A方向断面を示し、前
記可動側金型部材2の外周位置に配置した前記回転駒部
材20の固定位置を決める手段としてシリンダー手段4
0,42が設けられ、該シリンダーのピストン部材の先
端部には位置決めピン40B,42Bが取り付けられて
おり、該位置きめピン40B,42Bは前記回転駒部材
22、24の外周位置に形成したピン着脱用穴22B,
24Bにシリンダー操作に連動して着脱可能に構成され
る。FIG. 6 is a sectional view taken along the line AA in FIG. 5, and shows cylinder means 4 as means for determining the fixed position of the rotary piece member 20 arranged at the outer peripheral position of the movable mold member 2.
0 and 42 are provided, and positioning pins 40B and 42B are attached to the tip of the piston member of the cylinder. The positioning pins 40B and 42B are pins formed at the outer peripheral positions of the rotary piece members 22 and 24. Removable hole 22B,
24B is configured to be detachable in conjunction with cylinder operation.
【0080】固定側の回転駒部材22にも同様のピン着
脱穴が設置され、位置決めピン40B,42Bが前記回
転駒部材20の回転位置決めと同時に作用するように
回転駒位置決め手段が配置されている。A similar pin attaching / detaching hole is also provided on the fixed rotating piece member 22 so that the positioning pins 40B and 42B act simultaneously with the rotation positioning of the rotating piece member 20.
A rotating piece positioning means is arranged.
【0081】尚、前記位置決めピンにはピン作動位置検
出用センサーS−1が設置されており、該センサーS−
1の信号により位置決めピンの位置の適正位置の確認、
しいては、回転駒部材20,22の相互の位相合せの適
否の判別動作が成されるようになっている。The positioning pin is provided with a sensor S-1 for detecting a pin operating position.
Check the proper position of the positioning pin by the signal of 1.
Accordingly, an operation of determining whether or not the phase adjustment of the rotating piece members 20 and 22 is appropriate is performed.
【0082】図9は本実施例装置の制御装置を示し、可
動側金型部材の駆動手段44、成形品取り出しのエジェ
クターピン作動手段46、樹脂材料の射出制御手段4
8、前記回転駒部材20,22の位相合せのための位置
決めピン40,42のシリンダー制御手段50、及び、
前記位置決めピン位置確認センサーの制御手段52及び
全体を制御する制御手段54等から構成される。FIG. 9 shows a control device of the apparatus of the present embodiment. The driving means 44 for the movable mold member, the ejector pin operating means 46 for taking out the molded product, and the resin material injection control means 4 are shown.
8. Cylinder control means 50 of positioning pins 40, 42 for phase adjustment of the rotating piece members 20, 22;
It comprises a control means 52 for the positioning pin position confirmation sensor and a control means 54 for controlling the whole.
【0083】次に、第一実施例装置の作動について説明
する。Next, the operation of the first embodiment will be described.
【0084】図5、6の型閉じ状態に成して、各部材を
成形準備状態に設定する。Each of the members is set to a molding ready state while the mold is closed as shown in FIGS.
【0085】尚、本実施例のやまば歯車の製造に使用し
た樹脂材料はポリフェニレンサリファイド(PPS)であ
る。The resin material used for manufacturing the helical gear of this embodiment is polyphenylene sulfide (PPS).
【0086】やまば歯車などの螺合して駆動力を伝達す
るための歯車成形材料としては前記ポリアセタール以外
にも ポリアセタール(POM)、ナイロン(PA) 等の
樹脂材料が適用できる。As a gear forming material for transmitting a driving force by screwing in a bevel gear or the like, a resin material such as polyacetal (POM) or nylon (PA) can be used in addition to the above-mentioned polyacetal.
【0087】図5、6の型閉じ状態では固定側及び可動
側の各位置決めピン40B,42Bは各回転駒の位置決
め穴22B,24Bに係合しており、センサー制御手段
52からの信号により確認操作が行われる。In the mold closed state shown in FIGS. 5 and 6, the positioning pins 40B and 42B on the fixed side and the movable side are engaged with the positioning holes 22B and 24B of each rotating piece, and the confirmation operation is performed by a signal from the sensor control means 52. Is performed.
【0088】これにより固定側と可動側の回転駒部材2
0,22の歯部の位相が合致する。Thus, the fixed and movable rotary piece members 2
The phases of the 0,22 tooth portions match.
【0089】図5、6による型閉じ状態後、前記ランナ
ーに接続している不図示の射出シリンダーから前記樹脂
材料の溶融材料を射出し、溶融樹脂材料を前記の、固定
金型部材、可動金型部材各回転駒部材及びスライド部材
などで形成したキャビテイ内に充填する。After the mold is closed as shown in FIGS. 5 and 6, a molten material of the resin material is injected from an injection cylinder (not shown) connected to the runner, and the molten resin material is injected into the fixed mold member, the movable mold, and the like. The mold member is filled in the cavity formed by each rotating piece member and the slide member.
【0090】所定容量の溶融樹脂材料の射出後、金型に
一定の圧力を維持し、不図示の冷却配管への冷却媒体の
注入循環によるキャビテイ内樹脂材料の冷却工程を実行
する。After injecting a predetermined volume of the molten resin material, a constant pressure is maintained in the mold, and a cooling process of the resin material in the cavity is performed by injecting and circulating a cooling medium into a cooling pipe (not shown).
【0091】前記冷却工程による射出樹脂の所定硬度へ
の固化時間経過後、成形品の離型操作に移行する。After the elapse of the solidification time of the injection resin to the predetermined hardness in the cooling step, the operation proceeds to the release operation of the molded product.
【0092】離型操作は可動側金型の駆動手段による可
動側金型部材の図示矢印A方向への駆動操作により行わ
れる。The releasing operation is performed by driving the movable mold member in the direction of arrow A in the figure by the movable mold driving means.
【0093】可動側金型部材の開き動作は金型駆動手段
44による可動側型板部材と可動側金型取り付け部材部
分の図示矢印A方向への移動により実行されるが、この
時、前記スライド部材32,34は前記アンギュラーピ
ン36,38の傾斜角度に対応して、図7、8に示すよ
うに、突き合わせ位置から離れる方向C,Dに移動す
る。The opening operation of the movable-side mold member is executed by moving the movable-side mold plate member and the movable-side mold mounting member in the direction of the arrow A shown in the drawing by the mold driving means 44. The members 32, 34 move in the directions C, D away from the abutting position, as shown in FIGS. 7 and 8, corresponding to the inclination angles of the angular pins 36, 38.
【0094】この際、前記スライド部材32,34の半
割部先端部32A、34Aが成形品のやまば歯車の中央
部のアンダーカット部分の成形部分として成形品のやま
ば歯車樹脂部に係合状態になっており、スライド部材3
2,34の開き方向C,Dの方向の移動により、可動側
の金型部材2に押し付ける方向の力を発生させ、前記位
置決めピンの規制を解除による、この成形品の可動側金
型部材2への押し付け力は固定側金型部材1の外周位置
に在る回転駒部材20の回転動作を誘発する。At this time, the tip portions 32A, 34A of the half portions of the slide members 32, 34 are engaged with the bevel gear resin portion of the molded product as a molded portion of the undercut portion at the center of the bevel gear of the molded product. State, the slide member 3
The movement of the mold members 2 and 34 in the opening directions C and D generates a force in the direction of pressing against the movable mold member 2, and the restriction of the positioning pin is released, so that the movable mold member 2 of this molded product is released. The urging force on the fixed die member 1 induces the rotation of the rotating piece member 20 located at the outer peripheral position of the fixed mold member 1.
【0095】この一連の動作により成形品のやまば歯車
は可動側金型部材とともに非回転で移動し、固定側金型
部材により成形されたやまば歯車の一方の歯部は回転駒
部材の回転動作により固定側金型部材及び固定側の回転
駒部材から離型操作される。By this series of operations, the helical gear of the molded product moves non-rotatably with the movable mold member, and one tooth of the helical gear molded by the fixed mold member is rotated by the rotating piece member. The release operation is performed from the fixed-side mold member and the fixed-side rotating piece member by the operation.
【0096】この可動側金型部材の開き操作の完了位置
の図7、8の位置状態で、成形品のやまば歯車は固定側
から完全に分離される。In the state shown in FIGS. 7 and 8 at the position where the opening operation of the movable mold member is completed, the bevel gear of the molded product is completely separated from the fixed side.
【0097】図7、8に示す位置の分離完了位置では前
記スライド部材32,34は成形品のアンダーカット位
置から完全に外れた位置に位置するが、可動側の回転駒
保持部材により抜け落ちないように保持されるとともに
回転駒部材22の端部を規制している。In the separation completion position shown in FIGS. 7 and 8, the slide members 32 and 34 are located at positions completely deviated from the undercut position of the molded product, but are prevented from falling off by the movable-side rotating piece holding member. And regulates the end of the rotating piece member 22.
【0098】続いて、エジェクター駆動手段46の作動
によりエジェクターピンの突き出し動作が行われ、エジ
ェクターピンの突き出し動作により、成形品のやまば歯
車は図示矢印B方向への力が作用し、これにより成形品
のB方向移動が回転駒部材22の回転動作によって許動
される。Subsequently, the ejector pin is pushed out by the operation of the ejector driving means 46, and the bevel gear of the molded product exerts a force in the direction of the arrow B shown in the figure by the ejecting action of the ejector pin. The movement of the article in the B direction is permitted by the rotation of the rotary piece member 22.
【0099】上記の操作により金型開き後、成形品の離
型終了まで成形品のやまば歯車の金型内での回転動作を
ともなわないで実行される。After the mold is opened by the above-described operation, the process is performed without the rotation of the helical gear of the molded product in the mold until the release of the molded product is completed.
【0100】上記第一の実施例に示した、装置の構成に
おいて、回転駒部材20,22は両者を回転駆動する構
成と成したが、一方の駒部材を非回転状態に構成しても
よい。In the structure of the apparatus shown in the first embodiment, the rotating piece members 20 and 22 are configured to rotate and drive both. However, one piece member may be configured to be in a non-rotating state. .
【0101】第二実施例の説明 図10乃至図14は本発明の第二の実施例の説明図であ
る。Description of Second Embodiment FIGS. 10 to 14 are explanatory diagrams of a second embodiment of the present invention.
【0102】図10、11は成形装置の型閉じ状態の説
明図、図12、13は型開き状態の説明図である。FIGS. 10 and 11 are explanatory diagrams of the mold closing state of the molding apparatus, and FIGS. 12 and 13 are explanatory diagrams of the mold opening state.
【0103】図14は第二実施例の各手段の制御ブロッ
ク図である。FIG. 14 is a control block diagram of each means of the second embodiment.
【0104】図において、符号60は固定側金型(駒)
部材、62は固定側型板部材、64はスプルブッシュ保
持部材、66は固定側の型保持部材である。In the figure, reference numeral 60 denotes a fixed mold (piece).
A member, 62 is a fixed side mold plate member, 64 is a sprue bush holding member, and 66 is a fixed side mold holding member.
【0105】68は可動側金型(駒)部材、70は可動
側型板部材、72は可動側の型保持部材、74はエジェ
クタープレート部材、76はエジェクターピンである。Reference numeral 68 denotes a movable mold (piece) member, 70 denotes a movable mold plate member, 72 denotes a movable mold holding member, 74 denotes an ejector plate member, and 76 denotes an ejector pin.
【0106】78、80は前記固定側金型部材60、可
動側金型部材68の外周位置に配置したやまば歯車の歯
部成形用駒部材であり、該各駒部材78,80は前記各
金型部材60,68の外周面と嵌合する部分78A,8
0Aと、歯部を成形するための成形用キャビテイを構成
する部分78B、80Bと、前記回転駒を保持する保持
部材82,84と軸受部材86,88を介して嵌合して
いる部分78C,80Cなどから構成される。Reference numerals 78 and 80 denote tooth members for forming a tooth portion of a bevel gear which are arranged at the outer peripheral positions of the fixed die member 60 and the movable die member 68, respectively. Portions 78A, 8 to be fitted to the outer peripheral surfaces of mold members 60, 68
0A, portions 78B and 80B forming a molding cavity for forming the teeth, and portions 78C fitted via holding members 82 and 84 and bearing members 86 and 88 for holding the rotating pieces. 80C or the like.
【0107】前記固定側及び可動側の一対の回転駒部材
78,80は前記金型部材60、68及び後述するスラ
イド部材90とともにやまば歯車成形のためのキャビテ
イを構成する。The pair of fixed and movable rotary members 78 and 80 together with the mold members 60 and 68 and a slide member 90 described later constitute a cavity for forming a bevel gear.
【0108】前記回転駒部材78,80は一対の組を成
し、その歯部成形用のキャビテイの歯部はやまば歯車の
傾斜角度が相互に傾斜角度の向きが異なる形状のため
に、各回転駒部材の位相を調整する必要があり、位相調
整手段を備えている。The rotating piece members 78 and 80 form a pair, and the teeth of the teeth forming cavity have a shape in which the inclination angles of the helical gears are different from each other. It is necessary to adjust the phase of the rotating piece member, and a phase adjusting means is provided.
【0109】該位相調整手段はスライド部材90、14
0、固定ストッパー部材92などから構成されている。The phase adjusting means includes slide members 90 and 14
0, a fixed stopper member 92 and the like.
【0110】前記スライド部材90、140は一対の板
形状であり、先端の突き合わせ部は成形されるやまば歯
車の歯部中央位置にアンダーカット部分(係合部)を成
形するキャビテイ部90Aを構成している。The slide members 90 and 140 are in the form of a pair of plates, and the butting portion at the tip constitutes a cavity portion 90A for forming an undercut portion (engaging portion) at the center of the tooth portion of the formed bevel gear. are doing.
【0111】前記スライド部材140の図10の図示、
上部側は該アンダーカット部材を開閉駆動する駆動手段
96との係合部140Aを形成してある。The slide member 140 is shown in FIG.
The upper portion is formed with an engaging portion 140A for engaging with a driving means 96 for driving the undercut member to open and close.
【0112】固定ストッパー部材92はリング形状を成
し、リング部の一部は切り欠かれて切り欠き部92Aを
形成している。The fixed stopper member 92 has a ring shape, and a part of the ring portion is cut out to form a cut-out portion 92A.
【0113】前記固定ストッパー92は前記スライド部
材90、140を挟んで、前記保持部材82,84に固
定されている。The fixed stopper 92 is fixed to the holding members 82 and 84 with the slide members 90 and 140 interposed therebetween.
【0114】図10の金型閉じ状態において、2枚の各
スライド部材90、140は閉成位置に在る。In the closed state of the mold shown in FIG. 10, the two slide members 90 and 140 are in the closed position.
【0115】前記回転駒部材78,80にはその外周側
に前記スライド部材90、140の突き合わせ面90C
(140C不図示)と係合する突起部78C,80Cが
設けられており、前記スライド部材90の閉成方向への
移動時に該突起部78C,80Cを押し当てて回転駒部
材78,80を回転操作する。The rotating piece members 78 and 80 have abutment surfaces 90C of the slide members 90 and 140 on their outer peripheral sides.
Protrusions 78C and 80C that engage with the slide members 90 (not shown) are provided. When the slide member 90 moves in the closing direction, the protrusions 78C and 80C are pressed to rotate the rotating piece members 78 and 80. Manipulate.
【0116】スライド部材の閉成位置への下降動作に連
動して各回転駒部材は回転されて、金型の閉成位置にお
いては各回転駒部材の歯部形成のキャビテイの位相調整
が自動的に行われる。Each rotating piece member is rotated in conjunction with the lowering operation of the slide member to the closed position, and the phase adjustment of the cavity for forming the teeth of each rotating piece member is automatically performed at the closing position of the mold. Done in
【0117】次に、第二実施例の操作について説明す
る。Next, the operation of the second embodiment will be described.
【0118】図10、11に示すように、各金型部材の
閉成位置状態において、スライド部材は駆動手段96に
よって閉成位置に位置合せされ、これにより前記回転駒
部材78,80は図8に示すように、スライド部材の前
記突き合わせ面90Cによる位相調整位置への回転操作
が行われている。As shown in FIGS. 10 and 11, when each of the mold members is in the closed position, the slide member is positioned at the closed position by the driving means 96, whereby the rotating piece members 78 and 80 are moved to the positions shown in FIGS. As shown in FIG. 7, the rotation operation of the slide member to the phase adjustment position by the butting surface 90C is performed.
【0119】やまば歯車成形のためのキャビテイ空間は
固定側金型部材60、可動側金型部材68、一対の回転
駒部材78,80、及び一対のスライド部材90,14
0によって形成される。The cavity space for forming the bevel gear includes a fixed mold member 60, a movable mold member 68, a pair of rotating pieces 78 and 80, and a pair of slide members 90 and 14.
0.
【0120】制御手段130の制御操作による射出制御
手段132により、不図示の射出シリンダーから溶融樹
脂材料の射出が行われ、樹脂材料の前記キャビテイ内へ
の充填が行われ、その後、キャビテイ内の樹脂材料への
一定圧力の保持、不図示の冷却用配管への冷却媒体の供
給による冷却工程が実行される。Injection of the molten resin material from an injection cylinder (not shown) is performed by the injection control means 132 by the control operation of the control means 130, and the resin material is filled into the cavity. A cooling step is performed by maintaining a constant pressure on the material and supplying a cooling medium to a cooling pipe (not shown).
【0121】冷却工程終了後、成形品の離型操作が行わ
れる。After the cooling step, a mold release operation of the molded product is performed.
【0122】可動側の金型部材の開き操作により可動側
が図示矢印C方向に移動する。The movable side moves in the direction of arrow C in the figure by opening the movable side mold member.
【0123】同時に、スライド駆動手段96により前記
スライド部材90,140の矢印D方向への移動が行わ
れる。At the same time, the slide driving means 96 moves the slide members 90 and 140 in the direction of arrow D.
【0124】可動側のC方向への型開き動作と、前記ス
ライド部材のD方向への移動操作により成形品は前記ス
ライド部材90のアンダーカット成形部分の突き合わせ
面90Cが成形品を可動側に押し付ける作用と、成形品
の回転規制の作用をともない、これにより、回転駒部材
78,80の突起部78C,80Cとスライド部材の突
き合わせ面との係合が外れるので、回転駒部材は成形品
の可動側金型部材との移動に応じて回転動作する。By the mold opening operation in the direction C on the movable side and the operation of moving the slide member in the direction D, the butted surface 90C of the undercut molding portion of the slide member 90 presses the molded article against the movable side. With the action and the action of regulating the rotation of the molded article, the engagement between the projections 78C, 80C of the rotating piece members 78, 80 and the abutting surfaces of the slide members is released. It rotates in response to movement with the side mold member.
【0125】型開き終了位置において成形品は固定側金
型から完全に分離される。At the mold opening end position, the molded product is completely separated from the fixed mold.
【0126】その後、エジェクター制御手段134のエ
ジェクターピンによる成形品の可動金型部材からの離型
操作が行われて成形品の離型操作が終了する。Thereafter, the release operation of the molded product from the movable mold member by the ejector pin of the ejector control means 134 is performed, and the release operation of the molded product is completed.
【0127】離型操作終了後、金型キャビテイ内部の清
掃作業後、可動金型の閉成操作と、前記スライド部材の
駆動手段による成形開始位置への復帰操作が行われる。After the mold release operation is completed, after the work of cleaning the inside of the mold cavity, the operation of closing the movable mold and the operation of returning the slide member to the molding start position by the driving means are performed.
【0128】スライド部材の成形開始位置への復帰操作
に連動して前記回転駒部材78,80の歯部キャビテイ
部分の位相調整も自動的に行われる。In conjunction with the operation of returning the slide member to the molding start position, the phase adjustment of the tooth cavities of the rotary pieces 78 and 80 is automatically performed.
【0129】前記実施例では図3に示した従動側のやま
ば歯車200の成形の場合を説明したが、図4に示し
た、駆動用のやまば歯車300はアンダーカット形成部
分のキャビテイ形状を駆動用やまば歯車300の前記係
合部300Cの形状に変更すればよい。In the above embodiment, the case of forming the driven side gear 200 shown in FIG. 3 has been described. However, the driving gear 300 shown in FIG. What is necessary is just to change into the shape of the said engaging part 300C of the driving helical gear 300.
【0130】即ち、第一実施例の場合にはスライド部材
32の先端部のキャビテイ面を歯車300の係合部に対
応した形状にすればよい。That is, in the case of the first embodiment, the cavity surface at the distal end of the slide member 32 may be formed in a shape corresponding to the engaging portion of the gear 300.
【0131】[0131]
【発明の効果】本発明は、表面に歯部を有する成形品の
成形方法であって、成形品本体部を転写する固定側金型
部材と可動側金型部材及び前記歯部を転写する一対の回
転可能な駒部材から前記成形品成形用のキャビテイを形
成し、前記キャビテイ内への樹脂材料の射出、冷却工程
を経て、前記可動側金型部材の開成に伴い、前記回転駒
部材の回転操作により、成形品の前記固定側金型部材か
らの分離を行い、続いて、可動側金型部材から前記回転
駒部材の回転操作により離型操作を行うようにして成形
することを特徴とした表面に歯部を有する成形品の成形
方法により成形品のやまば歯車を離型操作時に回転動作
させることなく金型内から分離取り出す事ができる。According to the present invention, there is provided a method for molding a molded article having teeth on its surface, comprising a fixed mold member for transferring a molded article main body, a movable mold member and a pair of molds for transferring the teeth. Forming a cavity for molding the molded article from the rotatable piece member, injecting a resin material into the cavity, and performing a cooling step. With the opening of the movable mold member, the rotation of the rotary piece member By operation, the molded product is separated from the fixed mold member, and subsequently, the mold is formed by performing a releasing operation by rotating the rotary piece member from the movable mold member. By the method of molding a molded article having a tooth portion on the surface, the bevel gear of the molded article can be separated and taken out of the mold without rotating during the releasing operation.
【0132】更に本発明はやまば歯車の歯部中央部にア
ンダーカット部を成形したことを特徴としたやまば歯車
を得る事ができた。Further, according to the present invention, a bevel gear characterized in that an undercut portion was formed at the center of the tooth portion of the bevel gear was obtained.
【0133】又、上記構成の本発明のやまば歯車を駆動
力伝達機構に使用した場合、一対のやまば歯車の噛み合
わせの、スラスト位置の自由度をあたえることができ
る。Further, when the bevel gear of the present invention having the above structure is used for a driving force transmission mechanism, it is possible to give a degree of freedom of a thrust position for meshing a pair of bevel gears.
【0134】本発明の1つは歯部中央部にアンダーカッ
ト部を形成したやまば歯車の成形方法を得る事ができ、
固定及び可動金型部材上に配置した前記歯部を転写する
一対の回転駒部材の間に前記アンダーカット部を成形す
るためのスライド部材(アンダーカット成形部材)を設
け、前記可動金型部材の開き操作時に前記スライド部材
(前記アンダーカット成形部材)の移動に連動して前記
回転駒部材を回転操作させて成形品の離型を行うように
して成形することを特徴としたやまば歯車の成形方法を
得ることができた。One aspect of the present invention is to provide a method for forming a bevel gear in which an undercut portion is formed at the center of a tooth portion.
A slide member (undercut molding member) for molding the undercut portion is provided between a pair of rotary piece members for transferring the tooth portions disposed on the fixed and movable mold members, and a movable member for the movable mold member is provided. Forming a bevel gear, wherein the rotating member is rotated in conjunction with the movement of the slide member (the undercut forming member) during the opening operation to release the molded product; Managed to get the way.
【0135】更に本発明は、固定側金型部材と可動側金
型部材にやまば歯車を形成するキャビテイを設け、前記
やまば歯車の歯部を転写する一対の回転駒部材を前記各
金型部材に配置し、前記回転駒部材の間に前記やまば歯
車の歯部中央部のアンダーカット部を形成するスライド
部材を配置し、型開き操作時に、前記スライド部材の動
きに連動して成形した前記やまば歯車を非回転状態で離
型操作することを特徴としたやまば歯車の成形方法とす
ることで、やまば歯車の歯部中央部のアンダーカット部
分の係合部の成形精度を高める事ができた。Further, according to the present invention, the fixed mold member and the movable mold member are provided with cavities for forming helical gears, and a pair of rotating piece members for transferring the tooth portions of the helical gears are provided in each of the molds. A slide member forming an undercut portion at the center of the tooth portion of the bevel gear is disposed between the rotating piece members, and is formed in conjunction with the movement of the slide member during a mold opening operation. The method of forming a bevel gear is characterized in that the bevel gear is operated to be released in a non-rotating state, thereby increasing the forming accuracy of the engaging portion of the undercut portion at the center of the tooth portion of the bevel gear. I was able to do things.
【0136】図15は本発明に係るやまば歯車の製造方
法及び製造装置で製造した一対のやまば歯車を画像形成
装置の定着装置の駆動機構に採用した装置構成を示すも
のである。FIG. 15 shows an apparatus configuration in which a pair of helical gears manufactured by the method and apparatus for manufacturing a helical gear according to the present invention are used as a driving mechanism of a fixing device of an image forming apparatus.
【0137】本発明に係るやまば歯車機構を採用するこ
とにより、スラスト力が発生せずに、歯車噛み合い率を
高めることができ、歯車の噛み合いによる振動を抑える
ことができ、画像ずれを解消させることができた。By employing the helical gear mechanism according to the present invention, the gear meshing ratio can be increased without generating thrust force, vibration caused by gear meshing can be suppressed, and image misalignment can be eliminated. I was able to.
【0138】即ち、本発明により製造したやまば歯車
は、駆動側のやまば歯車と従動側のやまば歯車の噛み合
い係合状態において、図16乃至図18に示したよう
に、従動側歯車のアンダーカット成形部200cと駆動
側歯車のアンダーカット成形部300Cとが係合状態を
保持することで、バックラッシュを適正に保つことで、
歯車間に発生する振動を抑制することができる。That is, when the helical gear manufactured according to the present invention is in a meshing engagement state between the helical gear on the driving side and the helical gear on the driven side, as shown in FIGS. By maintaining the engaged state between the undercut forming part 200c and the undercut forming part 300C of the driving gear, the backlash is appropriately maintained,
Vibration generated between the gears can be suppressed.
【0139】更に、従動側やまば歯車200と駆動側や
まば歯車300の駆動機構としての組み立て状態におい
て、歯車200と歯車300の組み立て上の寸法許容条
件において、駆動側歯車300のアンダーカット部分3
00Dと従動側歯車200のアンダーカット部分200
Cの位置合せが図17に示すように相互に中心位置状態
に合致すれば良いが、図16又は図18に示すように、
左右に位置合せの位置が偏倚する場合が生じる。Further, in the assembled state of the driven side helical gear 200 and the driving side helical gear 300 as a driving mechanism, the undercut portion 3 of the driving side gear 300 under the dimensional permissible conditions for the assembly of the gear 200 and the gear 300.
00D and the undercut portion 200 of the driven gear 200
It is sufficient that the alignment of C coincides with the center position state as shown in FIG. 17, but as shown in FIG. 16 or FIG.
There may be a case where the alignment position is shifted left and right.
【0140】このような場合においても、本発明によ
る、各傾斜歯部間に係合部を備えたやまば歯車形状の場
合には、該係合部の寸法の許容範囲内での調整が可能と
なり、歯車係合時の振動、騒音を抑制することができ
た。Even in such a case, in the case of a helical gear having an engaging portion between each inclined tooth portion according to the present invention, the dimension of the engaging portion can be adjusted within an allowable range. Thus, vibration and noise during gear engagement could be suppressed.
【図1】画像形成装置の定着装置の説明図。FIG. 1 is an explanatory diagram of a fixing device of an image forming apparatus.
【図2】図1のP方向側面図。FIG. 2 is a side view in the P direction of FIG. 1;
【図3】本発明で成形するやまば歯車の構成の説明図。FIG. 3 is an explanatory view of a configuration of a bevel gear formed by the present invention.
【図4】本発明で成形するやまば歯車の構成の説明図。FIG. 4 is an explanatory diagram of a configuration of a bevel gear formed by the present invention.
【図5】成形装置金型を閉じた状態の説明図。FIG. 5 is an explanatory view of a state in which a molding apparatus mold is closed.
【図6】図1のA−A方向断面の説明図。FIG. 6 is an explanatory view of a cross section taken along line AA of FIG. 1;
【図7】成形装置の金型を開いた状態の説明図。FIG. 7 is an explanatory view of a state in which a mold of the molding apparatus is opened.
【図8】図1のA−A方向の断面の説明図。FIG. 8 is an explanatory view of a cross section in the AA direction of FIG. 1;
【図9】第一実施例の制御ブロック図。FIG. 9 is a control block diagram of the first embodiment.
【図10】成形装置の金型を閉じた状態の説明図。FIG. 10 is an explanatory view of a state in which a mold of the molding apparatus is closed.
【図11】図10のB−B方向断面の説明図。FIG. 11 is an explanatory view of a cross section taken along line BB of FIG. 10;
【図12】成形装置の金型を開いた状態の説明図。FIG. 12 is an explanatory view of a state where a mold of the molding apparatus is opened.
【図13】図11のB−B方向断面の説明図。FIG. 13 is an explanatory view of a section taken along line BB of FIG. 11;
【図14】第二実施例の制御ブロック図。FIG. 14 is a control block diagram of the second embodiment.
【図15】本発明に係るやまば歯車機構を組み込んだ定
着装置の構成図。FIG. 15 is a configuration diagram of a fixing device incorporating the helical gear mechanism according to the present invention.
【図16】本発明のやまば歯車による作用/効果の説明
図。FIG. 16 is an explanatory diagram of the operation / effect of the helical gear of the present invention.
【図17】本発明のやまば歯車による作用/効果の説明
図。FIG. 17 is an explanatory diagram of the operation / effect of the helical gear of the present invention.
【図18】本発明のやまば歯車による作用/効果の説明
図。FIG. 18 is an explanatory diagram of the operation / effect of the helical gear of the present invention.
1、60 固定側金型(駒)部材 2、62 可動側金型(駒)部材 4、66 固定側型保持部材 6 ランナーブッシュ 8 固定側型板部材 12 保持部材 14 可動側型板部材 16 エジェクタープレート 18 エジェクターピン 20、22、78,80 回転駒部材 24、26、82,84 支持部材 28、30、86,88 ベアリング 20A,22A 回転駒の歯部キャビテイ 32、34、90,90 スライド部材 36、38 アンギュラーピン 40、42 シリンダー手段 40B,42B 位置決めピン 44 金型駆動手段 46 エジェクター作動手段 48 射出制御手段 50 シリンダー制御手段 92 固定ストッパー 200 従動側のやまば歯車 300 駆動側のやまば歯車 1, 60 Fixed mold (piece) member 2, 62 Movable mold (piece) member 4, 66 Fixed mold holding member 6 Runner bush 8 Fixed mold plate member 12 Holding member 14 Movable mold plate member 16 Ejector Plate 18 Ejector pin 20, 22, 78, 80 Rotating piece member 24, 26, 82, 84 Supporting member 28, 30, 86, 88 Bearing 20A, 22A Tooth cavity 32, 34, 90, 90 of rotating piece Slide member 36, 38 Angular pin 40, 42 Cylinder means 40B, 42B Positioning pin 44 Die driving means 46 Ejector operating means 48 Injection controlling means 50 Cylinder controlling means 92 Fixed stopper 200 Driven side helical gear 300 Drive side helical gear
フロントページの続き (72)発明者 中垣 潤 東京都大田区下丸子3丁目30番2号キヤノ ン株式会社内 Fターム(参考) 3J030 AB01 AC03 AC10 BA06 BC08 4F202 AA23 AA29 AH12 AR07 CA11 CB01 CK32 CK43 CK55 CM01Continued on the front page (72) Inventor Jun Nakagaki 3-30-2 Shimomaruko, Ota-ku, Tokyo F-term in Canon Inc. (reference) 3J030 AB01 AC03 AC10 BA06 BC08 4F202 AA23 AA29 AH12 AR07 CA11 CB01 CK32 CK43 CK55 CM01
Claims (20)
あって、成形品本体部を転写する固定側金型部材と可動
側金型部材及び前記歯部を転写する一対の回転可能な駒
部材から前記歯部を有する成形品成形用のキャビテイを
形成し、前記キャビテイ内への樹脂材料の射出、冷却工
程を経て、前記可動側金型部材の開成に伴い、前記回転
駒部材の回転操作により、成形品の前記固定側金型部材
からの分離を行い、続いて、可動側金型部材から前記回
転駒部材の回転操作により離型操作を行うようにして成
形することを特徴とした表面に歯部を有する成形品の成
形方法。1. A method for molding a molded article having a tooth portion on a surface, comprising: a fixed mold member for transferring a molded article main body, a movable mold member, and a pair of rotatable mold members for transferring the tooth portion. A cavity for molding a molded article having the tooth portion is formed from the bridge member, a resin material is injected into the cavity, and a cooling step is performed. By operation, the molded product is separated from the fixed mold member, and subsequently, the mold is formed by performing a releasing operation by rotating the rotary piece member from the movable mold member. A method for molding a molded article having a tooth portion on a surface.
転状態に保持するようにしたことを特徴とした請求項1
記載の成形品の成形方法。2. The apparatus according to claim 1, wherein the pair of bridge members hold one of the bridge members in a non-rotating state.
A molding method of the molded article according to the above.
って、成形品の歯車本体部を成形する固定側金型駒部材
と可動側金型駒部材及び可動側の歯車の歯部を成形する
回転可能な回転駒部材と、並びに、前記固定側金型駒部
材に固定された固定側の歯車の歯部を成形する固定駒部
材とで前記歯車のキャビテイを形成し、前記キャビテイ
への樹脂材料の射出、冷却工程を経て、前記可動側の金
型駒部材の開成に伴い、前記回転駒部材の回転操作によ
り成形品歯車の固定側金型駒部材からの分離を行い、続
いて、前記回転駒部材の回転操作により可動側金型駒部
材からの成形品歯車の離型操作を行うようにして成形し
たことを特徴とした歯車の成形方法。3. A molding method of a gear having a tooth portion on a surface, comprising: forming a fixed mold piece member, a movable mold piece member, and a tooth portion of a movable gear for molding a gear body of a molded product. A rotatable rotating piece member to be molded, and a fixed piece member that forms the teeth of the fixed-side gear fixed to the fixed-side mold piece member, form the cavities of the gears. Injection of the resin material, through a cooling step, with the opening of the movable-side mold piece member, perform separation of the molded product gear from the fixed-side mold piece member by rotating the rotary piece member, A method of forming a gear, characterized in that molding is performed by performing a releasing operation of a molded product gear from a movable-side mold piece member by rotating the rotating piece member.
とした請求項3に記載の歯車の成形方法。4. The method according to claim 3, wherein the gear is a helical gear.
ト部を成形したことを特徴としたやまば歯車。5. A bevel gear characterized in that an undercut portion is formed in the center of a tooth portion of the bevel gear.
って、各やまば歯車の中央部に係合部を形成したことを
特徴としたやまば歯車。6. A helical gear having a pair of helical gears on a driving side and a driven side, wherein an engaging portion is formed at a central portion of each of the helical gears.
央部にアンダーカット部を構成した樹脂材料による成形
加工で製造したことを特徴とした請求項4又は5に記載
のやまば歯車。7. The hatch according to claim 4, wherein the engaging portion is manufactured by molding a resin material having an undercut portion in a central portion of a tooth portion of each of the hatch gears. gear.
まば歯車の歯部の噛み合い部以外であって、該一対のや
まば歯車が相互に係合する係合部を備えたことを特徴と
した一対のやまば歯車。8. A pair of helical gears, wherein the helical gears further include an engaging portion other than the meshing portion of the teeth of the pair of helical gears, wherein the engaging portions engage with each other. A pair of mountain gears.
工により作られ、前記各やまば歯車の歯部と歯部との間
にアンダーカット成形による前記係合部が形成されてい
ることを特徴とした請求項8記載のやまば歯車。9. The bevel gear is formed by a molding process using a resin material, and the engaging portion is formed between teeth of each of the bevel gears by undercut molding. The bevel gear according to claim 8, wherein
歯車であって、前記やまば歯車の歯部と歯部との間に、
前記各やまば歯車を該やまば歯車の軸線方向に移動可能
とする中間部を設けたことを特徴としたやまば歯車。10. A pair of helical gears composed of a driven side and a driving side, wherein a toothed portion of the helical gear is provided between teeth.
A bevel gear characterized in that an intermediate portion is provided for enabling the respective bevel gears to move in the axial direction of the bevel gear.
したやまば歯車の成形方法であって、固定及び可動金型
部材上に配置した前記歯部を転写する一対の回転駒部材
の間に前記アンダーカット部を成形するためのスライド
部材を設け、前記可動金型部材の開き操作時に前記スラ
イド部材の移動に連動して前記回転駒部材を回転操作さ
せて成形品の離型を行うようにして成形することを特徴
としたやまば歯車の成形方法。11. A method of forming a bevel gear having an undercut portion formed at a central portion of a tooth portion, wherein the method comprises a pair of rotary piece members for transferring the tooth portion disposed on a fixed and a movable mold member. A slide member for forming the undercut portion is provided, and when the movable mold member is opened, the rotary piece member is rotated in conjunction with the movement of the slide member to release the molded product. A method of forming a bevel gear, characterized in that it is formed by molding.
まば歯車を形成するキャビテイを設け、前記やまば歯車
の歯部を転写する一対の回転駒部材を前記各金型部材に
配置し、前記回転駒部材の間に前記やまば歯車の歯部中
央部のアンダーカット部を形成するスライド部材を配置
し、型開き操作時に、前記スライド部材の動きに連動し
て成形した前記やまば歯車を非回転状態で離型操作する
ことを特徴としたやまば歯車の成形方法。12. A fixed mold member and a movable mold member are provided with cavities for forming helical gears, and a pair of rotary piece members for transferring tooth portions of the helical gears are arranged on each of the mold members. A slide member forming an undercut portion at the center of the tooth portion of the bevel gear is disposed between the rotary piece members, and the mold is formed in conjunction with the movement of the slide member during a mold opening operation. A method of forming a bevel gear, comprising releasing a gear in a non-rotating state.
部中央部で分離した一対の回転駒部材と歯車本体を成形
する固定側及び可動側の金型部材を備え、成形品の離型
操作の際に、成形品を可動側金型部材に保持させて移動
させるための前記回転駒部材を回転駆動させる手段を備
えたことを特徴した成形装置。13. A pair of rotating piece members separated at the center of the tooth portion for transferring the tooth portion of the helical gear, and fixed-side and movable-side mold members for forming the gear body. A molding apparatus, comprising: means for rotating and driving said rotating piece member for holding and moving a molded product on a movable mold member during a mold operation.
であって、固定側金型部材と可動側金型部材に一対の回
転駒部材を設け、前記回転駒部材の間に前記成形品表面
にアンダーカット部を形成するスライド部材を配置した
ことを特徴とした表面に歯部を有する成形品の成形装
置。14. An apparatus for molding a molded article having a tooth portion on a surface, wherein a pair of rotating piece members are provided on a fixed mold member and a movable mold member, and the molded article is provided between the rotating piece members. A molding device for a molded article having a tooth portion on a surface, wherein a slide member forming an undercut portion is disposed on the surface.
成形装置であって、前記一対の回転駒部材の相対位置を
決める位置決め手段を備えていることを特徴とした請求
項14記載の成形装置。15. The molding apparatus according to claim 14, wherein said molding apparatus is a molding apparatus for molding a helical gear, and further comprising positioning means for determining a relative position between said pair of rotary piece members. .
置解除手段を備えたことを特徴とした請求項14記載の
成形装置。16. The molding apparatus according to claim 14, further comprising a position releasing means for said positioning means of said molding apparatus.
して前記スライド部材を移動操作し、該スライド部材の
移動に応じて成形品を可動側金型部材に保持させて型開
き操作を行うようにしたことを特徴とした請求項14記
載の成形装置。17. A moving operation of the slide member in conjunction with an opening operation of the movable mold member, and holding the molded product on the movable mold member in accordance with the movement of the slide member to perform a mold opening operation. The molding apparatus according to claim 14, wherein the molding is performed.
装置であって、成形用金型部材と、前記金型部材ととも
に前記やまば歯車を成形するための歯部転写部を形成し
たキャビテイを構成する回転駒部材を有し、前記やまば
歯車の歯部中央を境目としたやまば歯部の相互の歯車部
分の位相の位置決めを行う手段を備えた事を特徴とした
やまば歯車の成形装置。18. An apparatus for molding a bevel gear from a resin material, comprising a molding member and a cavity formed with a tooth part transfer portion for molding the bevel gear together with the mold member. And a means for positioning the phase of the mutual gear portion of the toothed teeth at the center of the teeth of the toothed gears. .
対の歯部成形用回転駒部材と、前記歯部成形用回転駒部
材の相対位置を規制する規制部材を有することを特徴と
したやまば歯車の成形装置。19. A rotary member having a pair of teeth forming rotary members for forming relative teeth of a bevel gear, and a restricting member for restricting a relative position of the teeth forming rotary member. A device for forming a bevel gear.
車の歯部中央部のアンダーカット部を成形する部材であ
ることを特徴とした請求項18記載のやまば歯車の成形
装置。20. The apparatus according to claim 18, wherein the restricting member is a member that forms an undercut portion at a central portion of a tooth portion of the formed helical gear.
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JP33432299A JP3990848B2 (en) | 1999-11-25 | 1999-11-25 | Molding method and molding apparatus |
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JP3990848B2 JP3990848B2 (en) | 2007-10-17 |
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JP2008240880A (en) * | 2007-03-27 | 2008-10-09 | Enplas Corp | Resin-made gear |
JP2009248442A (en) * | 2008-04-07 | 2009-10-29 | Seiko Epson Corp | Forming mold |
CN109483831A (en) * | 2018-12-28 | 2019-03-19 | 昆山飞亚精密模具有限公司 | Demoulding mechanism is buckled in minor diameter circular hole |
JP2019195937A (en) * | 2018-05-09 | 2019-11-14 | キヤノン株式会社 | Gear, manufacturing method of the same, and injection mold used for gear manufacturing |
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JP2009248442A (en) * | 2008-04-07 | 2009-10-29 | Seiko Epson Corp | Forming mold |
JP2019195937A (en) * | 2018-05-09 | 2019-11-14 | キヤノン株式会社 | Gear, manufacturing method of the same, and injection mold used for gear manufacturing |
JP7071208B2 (en) | 2018-05-09 | 2022-05-18 | キヤノン株式会社 | Gears, gear manufacturing methods, and injection molds used to manufacture gears |
CN109483831A (en) * | 2018-12-28 | 2019-03-19 | 昆山飞亚精密模具有限公司 | Demoulding mechanism is buckled in minor diameter circular hole |
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