JP4410639B2 - Mold fastening device - Google Patents

Mold fastening device Download PDF

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JP4410639B2
JP4410639B2 JP2004255365A JP2004255365A JP4410639B2 JP 4410639 B2 JP4410639 B2 JP 4410639B2 JP 2004255365 A JP2004255365 A JP 2004255365A JP 2004255365 A JP2004255365 A JP 2004255365A JP 4410639 B2 JP4410639 B2 JP 4410639B2
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shaft
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groove
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義利 石井
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オークマ株式会社
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本発明はプレス機械や射出成形機などの成形機械において金型を締結する装置に関し、詳しくは分解・組立する場合に固定金型と可動金型を一体化することにより、作業を大幅に合理化できる金型締結装置に関する。   The present invention relates to a device for fastening a mold in a molding machine such as a press machine or an injection molding machine. More specifically, when disassembling / assembling, a fixed mold and a movable mold can be integrated to greatly streamline the work. The present invention relates to a mold fastening device.
プレス機械や射出成形機などの操作作業上、金型を機上に装置する場合や金型を機械から取り外す場合に、固定金型,可動金型,主型をそれぞれ単体に分解してから工場内の保管場所へ運搬し保管している。
また、金型が大きな場合には機械に取り付け・取り外し時にクレーンを用いるため、金型を損傷させないよう慎重な作業となっている。
また、固定金型と可動金型はセットで管理すべきであるが、多くの工場では分離した状態で個別に保管されている。
このように、成形用金型が分離した状態で保管しない場合、固定金型と可動金型の一体化は、時間をかけ適当な段取を行い手締めで行っている。
また、本来の型締めとは別の締結装置を使用する必要があるため大きな器具・容積が必要であった。先行技術として特許文献1がある。これは一対の金型をロックする装置であり、ロックに要する力は小であるが、分離に要する力を大きくすることができるものである。
For operations such as press machines and injection molding machines, when the mold is installed on the machine or when the mold is removed from the machine, the fixed mold, the movable mold, and the main mold are disassembled into a single unit before the factory. It is transported to and stored in the storage location.
In addition, when the mold is large, a crane is used for attaching / detaching to / from the machine. Therefore, careful work is taken so as not to damage the mold.
In addition, fixed molds and movable molds should be managed as a set, but in many factories they are stored separately.
As described above, when the molding die is not stored in a separated state, the fixed die and the movable die are integrated by hand tightening after taking appropriate time.
Further, since it is necessary to use a fastening device different from the original mold clamping, a large instrument / volume is required. There exists patent document 1 as a prior art. This is a device for locking a pair of molds, and the force required for locking is small, but the force required for separation can be increased.
また、自己型締め金型装置の先行技術として特許文献2がある。
文献2の金型装置10は、プレート18,19,20を組み合わせ、ピンで一体にした金型本体12と、本体内部に設けられたロック機構16とからなっている。ロック機構はロックするための力発生装置54とタイロッド装置52からなっている。
力発生装置は、シャフト100にばね座金91を積層して構成し、シャフト100に直列にタイロッド56を配して施錠可能に構成している。金型装置10が液注入で位置、若しくは成品取出し位置でシャフト100の後端とタイロッド56の前端部からアクチュエータ装置がそれぞれ作用する。シャフト100に対し重ねたばねを圧縮する方向に押圧し、押圧後にタイロッド56の前端の十字溝と係合して、タイロッド56を90度旋回させシャフト100との係合を解くようにしたものである。〔説明分の符号は特許文献2と同じである〕
特開2001−88132号 特開平5−345338号
Further, there is Patent Document 2 as a prior art of a self-clamping die apparatus.
The mold apparatus 10 of Document 2 includes a mold body 12 in which plates 18, 19, and 20 are combined and integrated with pins, and a lock mechanism 16 provided inside the body. The locking mechanism includes a force generating device 54 and a tie rod device 52 for locking.
The force generator is configured by laminating a spring washer 91 on a shaft 100, and a tie rod 56 is arranged in series with the shaft 100 so as to be locked. The actuator device acts from the rear end of the shaft 100 and the front end portion of the tie rod 56 at the position where the mold apparatus 10 is in the liquid injection position or the product take-out position. The spring overlapped with the shaft 100 is pressed in a compressing direction, and after being pressed, engaged with the cross groove at the front end of the tie rod 56, the tie rod 56 is turned 90 degrees to disengage from the shaft 100. . [Explanation symbols are the same as in Patent Document 2]
JP 2001-88132 A JP-A-5-345338
成形機械への金型の取付け・取外しを、可動金型と固定金型を分離してその作業を行う場合は、多くの時間を要し、作業時に金型の一部を損傷するという問題を生じていた。
また、運搬や保管用の専用台が必要であり、保管スペースが大となる問題が生じていた。 また、金型を一対で締結し保管するための専用の緊定具を準備することは予期せぬ費用の発生とスペース確保が問題であった。
また、質量の大きい金型を一体にして運搬するには、従来の締結装置では締結力が不足するという問題を有していた。
When installing and removing a mold from a molding machine with a movable mold and a fixed mold separated, it takes a lot of time and damages part of the mold during the work. It was happening.
In addition, a dedicated stand for transportation and storage is required, which causes a problem that the storage space becomes large. In addition, preparation of a dedicated fastener for fastening and storing a pair of molds has been a problem of unexpected cost generation and space securing.
Further, in order to transport a large-sized mold as a unit, the conventional fastening device has a problem that the fastening force is insufficient.
特許文献1及び特許文献2に開示された一対の金型の締結装置は、成形時に要する型締め圧力を確保するためのものである。従って、一対の金型を一体に締結してから成形機械から取外して運搬・格納する締結装置として適用できるものではない。
これらの締結装置を運搬用締結装置に採用する場合には、特許文献1の自在ロック装置は、質量の大きい金型に適用するには把持力が過小であるという問題があり、特許文献2の射出成形金型に使用されている緊定具は、締結力解錠用の力発生装置とロックボルト旋回機構が必要となり成形機械上にこれらを装置するためのスペースが必要であるという問題を生じていた。
The pair of mold fastening devices disclosed in Patent Literature 1 and Patent Literature 2 is for securing the clamping pressure required at the time of molding. Therefore, it is not applicable as a fastening device that fastens a pair of molds together and then removes them from the molding machine for transportation and storage.
When these fastening devices are employed in a transportation fastening device, the universal locking device of Patent Document 1 has a problem that the gripping force is too small to be applied to a mold having a large mass. The fasteners used in injection molds have a problem that a force generating device for locking force and a lock bolt turning mechanism are required, and a space is required on the molding machine to install them. It was.
本発明は従来技術の有するこのような問題に鑑みなされたものであり、その目的とするところは、固定金型と可動金型の一対の金型を一体にする締結の操作がドグの押圧動作のみで可能であり、且つ、大きな締結力が得られる増力機構を含む締結機構を金型に埋め込んで一体化して金型を移設可能にすることにより、主型への取付け及び取外しの作業性の向上及び金型の運搬と保管の大幅な合理化が図れる金型締結装置を提供しようとするものである。   The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to perform a dog pressing operation in which a pair of molds of a fixed mold and a movable mold are integrated. It is possible to install and remove from the main mold by embedding and integrating the fastening mechanism including a boosting mechanism that can obtain a large fastening force into the mold. It is an object of the present invention to provide a mold fastening device capable of improving and greatly rationalizing the transportation and storage of molds.
請求項1に記載の金型締結装置は、成形機械において固定金型と可動金型とを締結する装置であって、前記固定金型または前記可動金型の何れか一方の金型に設けられた被把持部と、
何れか他方の金型に設けられ前記被把持部を把持して前記他方の金型側に引き込むクランプ装置とからなり、
前記他方の金型の当接面の反対面から軸端ドッグ部を押圧操作することにより前記一方の金型に対し接近・離隔する方向に移動可能な軸と、
前記軸の前記一方の金型側の端部に係合連結されて前記一方の金型に設けられた前記被把持部を把持開放可能に開閉する複数個の把持部と、
前記軸を前記一方の金型から離隔する方向に常時付勢する付勢手段と、
前記軸が前記一方の金型から離隔する方向に移動したときに前記被把持部を把持した状態の前記把持部の外周を保持する内周面が筒状に形成され前記軸が一方の金型側への移動で前記把持部軸端が嵌り込んで前記被把持部の把持を開放する前記内周面より大径の溝が形成された規制手段とを含んでなり、固定金型と可動金型を一体金型として持ち運びできるようにしたものである。
The mold fastening apparatus according to claim 1 is an apparatus for fastening a fixed mold and a movable mold in a molding machine, and is provided in one of the fixed mold and the movable mold. A gripped portion;
A clamp device that is provided on any other mold and grips the gripped portion and pulls it toward the other mold;
A shaft movable in a direction approaching and separating from the one mold by pressing the shaft end dog portion from the opposite surface of the contact surface of the other mold;
A plurality of gripping portions for gripping releasably closing said gripped portion of said being engaged connected to an end portion of one of the mold side is provided on one of the mold the said shaft,
A biasing means for constantly biasing the shaft in a direction away from the one mold;
An inner peripheral surface that holds the outer periphery of the gripping portion in a state of gripping the gripped portion when the shaft moves in a direction away from the one mold is formed in a cylindrical shape, and the shaft is one mold And a restricting means in which a groove having a diameter larger than that of the inner peripheral surface is formed so that the grip end of the grip portion is fitted to release the grip of the gripped portion. The mold can be carried as an integral mold.
請求項1の発明によれば、可動金型と固定金型の一対の金型に把持部と被把持部を設けてクランプする際に、例えば固定金型に可動金型が移動し当接する方向に移動可能な軸を設け、可動金型側の軸端に把持開放可能に開閉する把持部を設け、この移動する軸に可動金型が固定金型に当接する方向に常時付勢手段で緊締力を付与し、可動金型が接近して当接する際、当接面上で位置決めする規制手段を設けたものである。
クランプされ一対になった両金型はそのまま成形機からの取外して運搬できるので取り扱いと保管が容易となる。
According to the first aspect of the present invention, when the gripping portion and the gripped portion are provided and clamped on the pair of molds of the movable mold and the fixed mold, for example, the direction in which the movable mold moves and contacts the fixed mold A movable shaft is provided at the end of the movable mold, and a gripping part that can be opened and closed is provided at the end of the movable mold, and the movable mold is always tightened with a biasing means in the direction in which the movable mold contacts the fixed mold. When a movable mold is brought into close contact with a force, a restricting means for positioning on the contact surface is provided.
The clamped and paired molds can be removed and transported from the molding machine as they are, so that handling and storage are easy.
請求項2に記載の金型締結装置は、前記規制手段の外周が、前記他方の金型から前記一方の金型側に突出して設けられ、前記一方の金型において前記規制手段と対向する部分に前記規制手段の本体外周と同形状で僅かに大きい穴が形成され、且つこの穴の底部に前記被把持部が取り付けられてなり、一方の金型と他方の金型との締結時に、規制手段と穴が係合することにより、一方の金型と他方の金型との当接面上の位置決めを行うものである。   The mold fastening device according to claim 2, wherein an outer periphery of the restricting means is provided so as to protrude from the other mold toward the one mold, and the portion facing the restricting means in the one mold. And a slightly larger hole having the same shape as the outer periphery of the body of the restricting means is formed, and the gripped portion is attached to the bottom of the hole, and when one mold and the other mold are fastened, By positioning the means and the hole, positioning on the contact surface between one mold and the other mold is performed.
請求項2の発明によれば、固定金型と可動金型を毎回同位置で当接させるため相互位置決め用の専用の独立ピン等の部材を使用せず、進退する把持軸の軸部に設けた把持部を例えば固定金型の端面から突出するように設けた規制手段の内径面で案内し、規制手段の外周面を当接する他方の金型の端面に孔設した僅かに大きな基準穴に嵌め込んで位置決めできるようにしたものであり、一対の金型の当接時の位置決めと把持具の締結動作を同時に行えるようにしたものである。   According to the second aspect of the present invention, the fixed mold and the movable mold are brought into contact with each other at the same position each time, and a member such as a dedicated independent pin for mutual positioning is not used but provided on the shaft portion of the gripping shaft that moves forward and backward. For example, the holding portion is guided by the inner diameter surface of the restricting means provided so as to protrude from the end face of the fixed mold, and the slightly larger reference hole provided in the end face of the other die contacting the outer peripheral face of the restricting means. It is designed to be fitted and positioned so that the positioning when the pair of molds are in contact and the fastening operation of the gripping tool can be performed simultaneously.
請求項3に記載の金型締結装置は、
前記軸が、前記付勢手段により前記一方の金型から離隔される方向に常時付勢されるとともに前記一方の金型側端部に外周環状溝が設けられた第1の軸と、
前記一方の金型側に前記把持部を係合連結するとともに、前記他方の金型側において同一円周上に複数の穴が削設された円筒部分が、前記第1の軸と軸方向移動可能に嵌装する第2の軸と、
前記複数の穴に転動可能に嵌装される前記円筒部分の肉厚より大きい直径の複数の転動体とからなり、
前記規制手段の前記内周面には前記内周面より大径の内周環状溝が前記転動体と対応する位置に刻設され、
前記第1の軸の外周環状溝は、その溝深さと前記第2の軸の円筒部分の肉厚との和が前記転動体の直径より大きい溝底部を有するとともに前記外周環状溝の途中から前記一方の金型側の端部の外径へ円錐状の面で結ばれる雄テーパ部が形成され、
前記規制手段の内周環状溝は、その溝深さと前記円筒部分の肉厚との和が前記転動体の直径未満となる溝底部を有し、この溝底から前記一方の金型側へ円筒内周面に円錐面で結ばれる雌テーパ部が形成されており、
前記雄テーパ部と前記雌テーパ部と前記転動体とからなる増力機構を構成しているものである。
The mold fastening device according to claim 3 is:
It said shaft comprises a first shaft outer peripheral annular groove in the mold side end of the one with the always biased in a direction to be spaced apart from the mold of the one is provided by the biasing means,
With engaging coupling the gripper to the one of the mold side, the other cylindrical portion in which a plurality of holes on the same circumference in the mold side is Kezu設is axially moved to the first axis A second shaft to be fitted,
A plurality of rolling elements having a diameter larger than the wall thickness of the cylindrical portion fitted in the plurality of holes so as to be able to roll;
An inner peripheral annular groove having a larger diameter than the inner peripheral surface is engraved on the inner peripheral surface of the restricting means at a position corresponding to the rolling element ,
The outer circumferential annular groove of the first shaft has a groove bottom portion in which the sum of the groove depth and the thickness of the cylindrical portion of the second shaft is larger than the diameter of the rolling element, and from the middle of the outer circumferential groove. A male taper portion is formed that is connected to the outer diameter of the end on one mold side by a conical surface,
The inner circumferential annular groove of the restricting means has a groove bottom portion in which the sum of the groove depth and the thickness of the cylindrical portion is less than the diameter of the rolling element, and the cylinder extends from the groove bottom to the one mold side. A female taper portion connected by a conical surface is formed on the inner peripheral surface,
A force-increasing mechanism comprising the male taper portion, the female taper portion, and the rolling element is configured.
請求項3の発明によれば、把持部のコレットと連動する第2の軸と軸方向に常時付勢されている第1の軸との係合面をそれぞれ円錐状の面からなるテーパ部とし、これらのテーパ部間に転動体を介在させ第1の軸に加えられている付勢力を増力して第2の軸に伝え被把持部のプルスタッドを把持するコレットの締結力を強固にすることを可能にするものである。
なお、コレットの開口と締結力の解除は本体金型に設けた押圧部材(図示しない)で金型背面から第1の軸のドッグ部を押圧することにより操作可能である。ここで金型背面とは当接する面の反対側の側面をいうものとする。
According to the invention of claim 3, the engagement surface between the second shaft interlocked with the collet of the gripping portion and the first shaft always urged in the axial direction is a tapered portion made of a conical surface. Further, a rolling element is interposed between these taper portions to increase the biasing force applied to the first shaft and transmit it to the second shaft to strengthen the fastening force of the collet that grips the pull stud of the gripped portion. It makes it possible.
The opening of the collet and the release of the fastening force can be operated by pressing the dog portion of the first shaft from the back of the mold with a pressing member (not shown) provided in the main body mold. Here, the mold back surface means the side surface opposite to the abutting surface.
請求項4に記載の金型締結装置は、前記転動体が胴のふくれた樽形転動体であって、その軸線を通る胴体部の曲率半径が、前記内周環状溝の溝底部半径よりも僅かに小さく形成されたものである。   The mold fastening device according to claim 4, wherein the rolling element is a barrel-shaped rolling element in which the trunk is swollen, and a radius of curvature of the trunk part passing through the axis is larger than a groove bottom radius of the inner circumferential groove. It is formed slightly smaller.
請求項4の発明によれば、転動体を樽形転動体にすることにより、樽形転動体と第1の軸の雄テーパ部及び第2の軸の雌テーパ部とにおける接触面への応力集中が緩和され、圧痕の発生を防ぐことができるので寿命の長期保持が可能である。   According to invention of Claim 4, by making a rolling element into a barrel-shaped rolling element, the stress to the contact surface in a barrel-shaped rolling element, the male taper part of a 1st axis | shaft, and the female taper part of a 2nd axis | shaft Concentration is relaxed and the generation of indentation can be prevented, so that the lifetime can be maintained for a long time.
請求項5に記載の金型締結装置は、前記雄テーパ部の前記円錐状の面は、前記第1の軸の軸断面上で前記樽形転動体の断面半径より大きい半径の円弧を前記第1の軸線回りに回転させた回転面に形成されてなるものである。   The mold fastening device according to claim 5, wherein the conical surface of the male taper portion has an arc having a radius larger than a cross-sectional radius of the barrel-shaped rolling element on an axial section of the first shaft. It is formed on a rotating surface rotated about an axis of 1.
請求項5の発明によれば、樽形転動体と雄テーパ面との当接面であって樽形転動体の軸断面にけおる樽形転動体の外径面が接触する雄テーパ部の円錐状の面を第1の軸の軸断面上で樽形転動体の断面半径より大きい半径の円弧を前記第1の軸線回りに回転させた回転面に形成することによりセルフロック機能が強固になるとともに、外部から大きな力が加わっても金型の締結が外れることを防止する能力が高い。   According to invention of Claim 5, it is a contact surface of a barrel-shaped rolling element and a male taper surface, Comprising: Of the male taper part which the outer diameter surface of the barrel-shaped rolling element in the axial cross section of a barrel-shaped rolling element contacts The self-locking function is strengthened by forming a conical surface on the rotating surface obtained by rotating an arc having a radius larger than the sectional radius of the barrel-shaped rolling element on the axial section of the first axis around the first axis. In addition, the ability to prevent the mold from being disengaged even when a large force is applied from the outside is high.
本発明の金型締結装置は上述の手段により課題を解決するようにした結果、次に記載する効果を奏する。   As a result of solving the problem by the above-mentioned means, the mold fastening device of the present invention has the following effects.
請求項1に記載の発明は、固定金型と可動金型を締結して一体化し、主型への取付け・取外しができるの金型の運搬・保管上大幅な合理化が可能であるという効果を有する。   The invention according to claim 1 has an effect that the fixed mold and the movable mold are fastened and integrated, and the mounting and removing from the main mold can be greatly rationalized in terms of transportation and storage of the mold. Have.
請求項2に記載の発明は、固定金型と可動金型との繰り返し当接時の正確な位置決めと当接後の締結とを同一位置で同時に行うので、締結具がコンパクトになり省スペース化が図れるという効果を有する。   According to the second aspect of the present invention, accurate positioning and repeated fastening after contact between the fixed mold and the movable mold are simultaneously performed at the same position, so that the fastener is compact and space-saving. Has the effect of achieving.
請求項3に記載の発明は、固定金型と可動金型間に雄雌テーパ部と転動体とからなる伝達機構を設けて増力機構を形成しているので、より大きな締結力を得ることが可能となるという効果を有する。   In the third aspect of the present invention, a transmission mechanism composed of a male and female tapered portion and a rolling element is provided between the fixed mold and the movable mold to form a force-increasing mechanism, so that a larger fastening force can be obtained. It has the effect that it becomes possible.
請求項4に記載の発明は、雄テーパ部と雌テーパ部の転動面間に樽形転動体を介在させることにより面圧が低下し圧痕が発生しなくなり寿命の長期化が図れるという効果を有する。   The invention according to claim 4 has an effect that the surface pressure is reduced and no indentation is generated, and the life can be extended by interposing a barrel-shaped rolling element between the rolling surfaces of the male tapered portion and the female tapered portion. Have.
請求項5に記載の発明は、雄テーパ部が円錐状の面を、第1の軸の軸断面上で樽形転動体の断面半径より大きい半径の円弧を前記第1の軸線回りに回転させた回転面に形成されているのでセルフロック機能の安定性が良好という効果を有し、また、一対に締結されている金型に何らかの外乱が加わっても締結力に及ぼす影響が殆どないという効果を有する。   According to a fifth aspect of the present invention, the male tapered portion rotates a conical surface around an arc having a radius larger than the cross-sectional radius of the barrel-shaped rolling element on the axial section of the first axis around the first axis. It has an effect that the stability of the self-lock function is good because it is formed on the rotating surface, and there is almost no effect on the fastening force even if some disturbance is applied to the molds that are fastened to a pair Have
以下本発明の実施の形態を図面にもとづいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.
図1は、本発明のクランプ装置を含む金型締結装置の全体説明図であって、成形機における固定金型と可動金型の一体化締結に使用する金型締結装置例である。図2は、本発明の金型締結装置の断面説明図である。図3は図2の金型締結装置におけるセルフロック機構のクランプ状態の説明図である。図4は図2の金型締結装置におけるセルフロック機構のアンクランプ状態の説明図である。   FIG. 1 is an overall explanatory view of a mold fastening device including a clamping device of the present invention, and is an example of a mold fastening device used for integrally fastening a fixed die and a movable die in a molding machine. FIG. 2 is a cross-sectional explanatory view of the mold fastening device of the present invention. FIG. 3 is an explanatory diagram of a clamped state of the self-locking mechanism in the mold fastening device of FIG. FIG. 4 is an explanatory view of an unclamped state of the self-locking mechanism in the mold fastening device of FIG.
図1において、対峙する固定金型1と可動金型2はそれぞれ固定側プラテン3、可動側プラテン4に固定された固定側主型5、可動側主型6に金型ロックシリンダ7により固定されている。金型締結装置8は、固定金型の当接面1aと可動金型2の当接面2aが当接した時に両型を一体化することができる締結装置である。   In FIG. 1, a fixed mold 1 and a movable mold 2 facing each other are fixed to a fixed side platen 3, a fixed side main mold 5 fixed to the movable side platen 4, and a movable side main mold 6 by a mold lock cylinder 7. ing. The mold fastening device 8 is a fastening device capable of integrating both molds when the contact surface 1a of the fixed mold and the contact surface 2a of the movable mold 2 are in contact.
図1に示す一体化金型では固定金型1に当接面が接近・離隔する方向に移動可能な軸9を含む把持部10、把持力を常時付勢する付勢手段11とを含み、可動金型2に被把持部12が設けられている。また、固定金型1と可動金型2が当接したとき当接面に直交する方向を規制する規制手段13が設けられている。規制手段13として固定金型1に設けた筒体16が可動金型2に孔設した基準穴2bと係合し、両金型が常に同位置で位置決めできる構成であることを示している。   The integrated mold shown in FIG. 1 includes a gripping portion 10 including a shaft 9 that can move in a direction in which the contact surface approaches and separates from the fixed mold 1, and a biasing means 11 that constantly biases the gripping force, A gripped portion 12 is provided on the movable mold 2. Further, a restricting means 13 is provided for restricting the direction orthogonal to the contact surface when the fixed mold 1 and the movable mold 2 are in contact. The cylinder 16 provided in the fixed mold 1 as the restricting means 13 is engaged with the reference hole 2b formed in the movable mold 2 so that both molds can always be positioned at the same position.
図2において、固定金型1と可動金型2とが当接面上で横ズレすることなく、常時同一個所で当接するように、可動金型2に孔設した基準穴2bに嵌着可能な突出部を有する筒体16は固定金型1の基準座ぐり穴1b,基準穴2bと同心に固設されている。可動金型2の基準穴2bの基底部に被把持部であるプルスタッド17が固設されている。
In FIG. 2, the fixed mold 1 and the movable mold 2 can be fitted into a reference hole 2 b provided in the movable mold 2 so that the fixed mold 1 and the movable mold 2 are always in contact at the same place without being laterally displaced on the contact surface. The cylindrical body 16 having a protruding portion is fixed to be concentric with the reference counterbore 1b and the reference hole 2b of the fixed mold 1. A pull stud 17, which is a gripped portion, is fixed to the base portion of the reference hole 2 b of the movable mold 2.
筒体16の穴16aを案内穴とし、筒体16の軸線上で進退摺動可能な第2の軸18の円筒部18bが嵌装されている。
第2の軸18の筒体16突出端側の一端は、プルスタッド17の頭部17aを把持するコレット19を溝部18aで案内可能な軸状に形成されている。コレット19は溝部18aの外周上に複数個装着され、リング状ばね20で一端が束ねられているので他端は筒体16の穴の径寸法に従い内周面16aにコレット爪19aが押し付けられている。コレット19が軸方向に移動して小径のとき閉じて軸頭部17aを挟持し、径が大きくなりコレット爪19aが開口して溝16cに入るとコレット爪部19aは頭部17aを把持しなくなる。
The cylindrical portion 18b of the second shaft 18 that is slidable forward and backward on the axis of the cylindrical body 16 is fitted with the hole 16a of the cylindrical body 16 as a guide hole.
One end of the second shaft 18 on the projecting end side of the cylindrical body 16 is formed in a shaft shape that can guide the collet 19 that holds the head portion 17a of the pull stud 17 with the groove portion 18a. A plurality of collets 19 are mounted on the outer periphery of the groove 18a, and one end is bundled by a ring-shaped spring 20, so that the other end is pressed against the inner peripheral surface 16a by the collet claw 19a according to the diameter of the hole of the cylindrical body 16. Yes. When the collet 19 moves in the axial direction and has a small diameter, the collet 19 closes and clamps the shaft head 17a. When the diameter increases and the collet claw 19a opens and enters the groove 16c, the collet claw 19a does not grip the head 17a. .
第2の軸18の他端は、筒体16のフランジ面近傍の穴16で外径が案内される円筒部18bに形成されている。第2の軸18の前記円筒部18bに係合し固定金型の背面1cの方向に常時付勢されクランプ力を付与する第1の軸21が第2の軸18の同心上に直列に設けられている。第1の軸21と第2の軸18は転動体22を介し連結されている。第1の軸21は第2の軸18と係合する側の溝付先端部が円筒部18bの内径穴で案内されている。
The other end of the second shaft 18 is formed in a cylindrical portion 18 b whose outer diameter is guided by a hole 16 a near the flange surface of the cylindrical body 16. A first shaft 21 that engages with the cylindrical portion 18b of the second shaft 18 and is constantly urged in the direction of the back surface 1c of the fixed mold to apply a clamping force is provided in series on the concentricity of the second shaft 18. It has been. The first shaft 21 and the second shaft 18 are connected via a rolling element 22. As for the 1st axis | shaft 21, the grooved front-end | tip part of the side engaged with the 2nd axis | shaft 18 is guided by the internal diameter hole of the cylindrical part 18b.
第1の軸21に、固定金型1の背面1c方向へ付勢する付勢手段の皿ばね23が軸上で移動可能に重ねて外装されている。皿ばねの一端(先端)は座金24を介して筒体16の後端面(反突出端)に接し、重ねて構成した皿ばね群の後方端は第1の軸21の軸端部のねじと螺合するナット25の端面に当接している。   On the first shaft 21, a disc spring 23 of biasing means for biasing in the direction of the back surface 1c of the fixed mold 1 is laid so as to be movable on the shaft. One end (front end) of the disc spring is in contact with the rear end surface (anti-projecting end) of the cylindrical body 16 via a washer 24, and the rear end of the disc spring group formed by overlapping is a screw at the end of the shaft of the first shaft 21. It abuts against the end face of the nut 25 to be screwed.
なお、第1の軸21を操作するドッグ27が軸端に設けられている。ナット25を螺入することにより皿ばね群が圧縮され、その反力が第1の軸21を常時背面方向に付勢することになる。なお、ナット25を螺入後も皿ばね群は一定量の撓み代は残されている。   A dog 27 for operating the first shaft 21 is provided at the shaft end. When the nut 25 is screwed in, the disc spring group is compressed, and the reaction force constantly biases the first shaft 21 in the back direction. Even after the nut 25 is screwed in, a certain amount of bending allowance remains in the disc spring group.
次に第1の軸21と第2の軸18の係合部について説明する。
図3,図4において、第1の軸21と第2の軸18とは転動体22を介し連結されている。複数の転動体22は円筒部18bに断続的に加工された穴18cに嵌装され、円筒部18bが保持具として機能する。図3において、第1の軸21の先端部分に形成したリング状の溝21aを転動体22の内案内面とし、筒体16の内径側に形成した溝16bを外案内面として係合している。溝16bはカラー26,28の内径側に形成されている。
Next, the engaging portion between the first shaft 21 and the second shaft 18 will be described.
3 and 4, the first shaft 21 and the second shaft 18 are connected via a rolling element 22. The plurality of rolling elements 22 are fitted into holes 18c that are intermittently processed in the cylindrical portion 18b, and the cylindrical portion 18b functions as a holder. In FIG. 3, the ring-shaped groove 21a formed at the tip portion of the first shaft 21 is used as the inner guide surface of the rolling element 22, and the groove 16b formed on the inner diameter side of the cylindrical body 16 is engaged as the outer guide surface. Yes. The groove 16 b is formed on the inner diameter side of the collars 26 and 28.
この係合部の機構について次に説明する。
図2において、転動体22の内案内面のリング状の溝21aは第1の軸21の軸線を通る平面上で円弧状に形成されている。溝深さは転動体22の半径に等しい。
更に、溝深さの約半分の位置から、軸21の外径に至る間を、軸21の軸断面上で転動体22の断面半径より大きい半径の円弧を前記第1の軸線回りに回転させた回転面である円錐状面21bが形成されている。この回転面を雄テーパ部と呼ぶ。
尚、ここでいうは必ずしも円弧に限らず、略円弧形状の滑らかな曲線であっても良く、軸21の外径から溝21aに向かって転動体22と接している部分の接線と、軸21の軸線との間の角度が緩くなる形状であれば良い。
Next, the mechanism of the engaging portion will be described.
In FIG. 2, the ring-shaped groove 21 a on the inner guide surface of the rolling element 22 is formed in an arc shape on a plane passing through the axis of the first shaft 21. The groove depth is equal to the radius of the rolling element 22.
Further, an arc having a radius larger than the cross-sectional radius of the rolling element 22 on the shaft cross section of the shaft 21 is rotated around the first axis from the position about half the groove depth to the outer diameter of the shaft 21. A conical surface 21b which is a rotating surface is formed. This rotating surface is called a male taper portion.
In addition, here, it is not necessarily limited to the circular arc, but may be a smooth curved line having a substantially circular arc shape, and the tangent line of the portion in contact with the rolling element 22 from the outer diameter of the shaft 21 toward the groove 21a and the shaft 21 Any shape can be used as long as the angle between the axis and the axis becomes loose.
コレット19は第1の軸21のナット25側が押圧されている間は、第1の軸21は金型の当接面方向に移動し皿ばね群を圧縮して第2の軸18をプルスタッド17に近づける。コレット19も同方向に移動し、コレット爪19aは開口しプルスタッド17の頭部17aを把持しなくなる。このとき転動体22は、第1の軸21がプルスタッド17の方向に移動しているため第1の軸21の転動体半径より大きい円錐状面21b、円筒部18bの保持器面18c、カラー26の円錐面26aの3点で保持されなくなり、転動体22は保持器の穴の中で遊動する状態に保たれる。   While the collet 19 is pressed on the nut 25 side of the first shaft 21, the first shaft 21 moves in the direction of the contact surface of the mold, compresses the disc spring group, and pulls the second shaft 18 into the pull stud. Move closer to 17. The collet 19 also moves in the same direction, and the collet claw 19a opens and does not grip the head 17a of the pull stud 17. At this time, since the first shaft 21 moves in the direction of the pull stud 17, the rolling element 22 has a conical surface 21b larger than the rolling element radius of the first shaft 21, the cage surface 18c of the cylindrical portion 18b, and the collar. 26, the rolling elements 22 are kept floating in the holes of the cage.
ナット25に対する押圧が解除されると、第1の軸21はプルスタッド17から離れる方向に移動する。転動体22は雄雌テーパ部間に挟持されるので第2の軸18も同方向に引かれコレット爪19aが穴16aに納まり、コレット19が閉じプルスタッド17の頭部17aを把持する。このとき頭部17aを固定金型1の方向に引く力は皿ばね群の圧縮反力そのままでなく、転動体22を第1の軸21の転動体半径より大きい円弧面とカラー26の円錐面26aで挟持させることによる楔効果で増力されている。   When the pressure on the nut 25 is released, the first shaft 21 moves away from the pull stud 17. Since the rolling element 22 is sandwiched between the male and female taper portions, the second shaft 18 is also pulled in the same direction so that the collet claw 19a is accommodated in the hole 16a, and the collet 19 is closed and grips the head 17a of the pull stud 17. At this time, the force that pulls the head portion 17a in the direction of the fixed mold 1 is not the compression reaction force of the disc spring group, but the rolling element 22 has an arc surface larger than the rolling element radius of the first shaft 21 and a conical surface of the collar 26. The force is increased by the wedge effect caused by being held by 26a.
従って、固定金型1と可動金型2の合計質量が大きくなっても一体化した場合の締結力は大きくできる。また、皿ばねを増力させた締結力以上の金型分離力が発生した場合は、第1の軸21が傾斜面21b如く円弧状のため、皿ばねは締結力以上に圧縮され、第1の軸21が軸方向に移動しても転動体22は傾斜面21bの傾斜の緩い方に移動するので、軸方向の力は径方向の分力に分散されることとなり、セルフロックとなっ金型一体化がはずれることはない。 このため、成形作業時の交換や取り換え時の格納保管作業における一体化した金型の取扱が安全で、且つ容易になる。 Therefore, even if the total mass of the fixed mold 1 and the movable mold 2 is increased, the fastening force when integrated can be increased. Further, when the fastening force over the mold separation force were energizing the disc spring occurs, because the arc-shaped as in the first axis 21 is inclined surface 21b, the disc spring is compressed above fastening force, the first since the shaft 21 is the rolling element 22 moves in the axial direction moves toward loose inclination of the inclined surface 21b, axial force becomes to be dispersed in the radial direction of the component force, become self-locking Mold integration will not be lost. For this reason, it is safe and easy to handle the integrated mold in the exchange during the molding operation and the storage and storage operation during the replacement.
次に本実施例の作用について説明する。
図2において、固定側主型5に設けられた押圧手段(図示しない)によりドッグ27を押し込むと皿ばね23が圧縮され第1の軸21が金型の端部方向に移動する。軸21の押し込み方向の先端の形状は図3に示す形状に形成されている。転動体22が軸21のぬすみ部分に落ち込み、図4の状態になる。このため第2の軸18は筒体16の穴16aをスライドできるため、コレット19も筒体16の内径を軸方向にスライドしてコレット爪19aは径の大きな溝16cに嵌まり込む。このときコレット爪19aの内径はプルスタッド17の頭部17aの外径より大きいのでプルスタッド17のアンクランプが可能となる。
Next, the operation of this embodiment will be described.
In FIG. 2, when the dog 27 is pushed in by pressing means (not shown) provided on the stationary main mold 5, the disc spring 23 is compressed and the first shaft 21 moves toward the end of the mold. The tip of the shaft 21 in the pushing direction is formed in the shape shown in FIG. The rolling element 22 falls into the slack portion of the shaft 21, and the state shown in FIG. Therefore, since the second shaft 18 can slide through the hole 16a of the cylindrical body 16, the collet 19 also slides the inner diameter of the cylindrical body 16 in the axial direction, and the collet claw 19a fits into the groove 16c having a large diameter. At this time, since the inner diameter of the collet claw 19a is larger than the outer diameter of the head 17a of the pull stud 17, the pull stud 17 can be unclamped.
この状態は、一体になった金型を固定側主型5と可動側主型6に装着し、金型ロックシリンダ7で固定金型1と可動金型2をロックし、固定側主型5側に設けた押圧部材でドッグ27を操作することによって可能である。   In this state, the integrated mold is mounted on the fixed main mold 5 and the movable main mold 6, the fixed mold 1 and the movable mold 2 are locked by the mold lock cylinder 7, and the fixed main mold 5 This is possible by operating the dog 27 with a pressing member provided on the side.
成形作業が終了し、使用した金型を機械から取り外す際に金型を一体化する場合、ドッグ27が押し込まれたままの状態でコレット19に他方の金型のプルスタッド17を挿入する。押圧力をなくしてドッグ27を後退させると皿ばね23の力で第1の軸21も後退し転動体22で連結されている第2の軸18が後退し、コレット19の爪19Aが筒体16の穴16aをスライドしつつプルスタッド17の頭部17Aを把持し引き込む。   When the molding operation is completed and the die is integrated when the used die is removed from the machine, the pull stud 17 of the other die is inserted into the collet 19 while the dog 27 remains pushed. When the dog 27 is retracted without the pressing force, the first shaft 21 is also retracted by the force of the disc spring 23, the second shaft 18 connected by the rolling element 22 is retracted, and the claw 19A of the collet 19 is the cylinder. The head 17A of the pull stud 17 is gripped and pulled while sliding through the 16 holes 16a.
プルスタッド17はいずれか一方の金型に固定されているため移動することがないので、第2の軸18もコレット19を介し固定され、第1の軸21のみが後退すると転動体22は第1の軸21のぬすみ部分から押し出され、第1の軸21の傾斜軸21bに乗り上げる。乗り上げた転動体22は円錐状面21bとカラー26の円錐面26aにより増力され第2の軸18を皿ばね23のばね力以上の力になって引き込む。   Since the pull stud 17 is fixed to one of the molds and does not move, the second shaft 18 is also fixed through the collet 19, and when only the first shaft 21 is retracted, the rolling element 22 is It is pushed out from the slack portion of the first shaft 21 and rides on the inclined shaft 21 b of the first shaft 21. The rolled-up rolling element 22 is increased by the conical surface 21 b and the conical surface 26 a of the collar 26, and pulls the second shaft 18 with a force greater than the spring force of the disc spring 23.
次に、クランプされた金型を分離させようとする外力はプルスタッド17とコレット19の係合を解放する方向に作用する。
即ち、プルスタッド17,コレット19,第2の軸18,転動体22,第1の軸21,ナット25,皿ばね23が順次作用して皿ばねの圧縮反力金型の締結力を発生させている。第2の軸18は転動体22をカラー26の円錐面26aと第1の軸21の円錐状面21bに押し付けるがカラー26の傾斜面の反力により、第1の軸21は軸方向の外力は掛からない。
Next, an external force for separating the clamped mold acts in a direction to release the engagement between the pull stud 17 and the collet 19.
That is, the pull stud 17, collet 19, second shaft 18, rolling element 22, first shaft 21, nut 25, and disc spring 23 act in sequence to generate a fastening force for the disc reaction compression die. ing. The second shaft 18 presses the rolling element 22 against the conical surface 26a of the collar 26 and the conical surface 21b of the first shaft 21. The reaction force of the inclined surface of the collar 26 causes the first shaft 21 to exert an external force in the axial direction. Does not hang.
特に雌テーパ部の円錐面を、凹んだ円錐状面とし樽形転動体より大きな半径の円弧で接触させるようにする。一体の金型のクランプを解除しようとする何らかの外力が働いて、皿ばねによるクランプ力に抗してプルスタッド17が離れる方向に引き出されようとするとき、転動体22が雄テーパ面から押されカラー26の凹んだ円錐面に沿って軸心方向に押し出される力が働く。   In particular, the conical surface of the female taper portion is a concave conical surface and is brought into contact with an arc having a larger radius than the barrel-shaped rolling element. When some external force is applied to release the clamp of the integral mold and the pull stud 17 is pulled out against the clamping force of the disc spring, the rolling element 22 is pushed from the male tapered surface. A force pushed in the axial direction along the concave conical surface of the collar 26 acts.
このとき、転動体22が軸心方向に移動するのに伴い、第1の軸21は第2の軸以上にプルスタッド17が離れる方向に移動することとなるが、そのとき、円錐状面21bで転動体22と接している部分の接線と、軸線との間の角度が緩い方向に移動を強いられる。従って、第1の軸21は皿ばね23の付勢力を弱めることにつながる皿ばね23の圧縮量を減少させる方向に移動することは阻止され、増力効果が弱められることがなく、セルフロック機能が維持される。   At this time, as the rolling element 22 moves in the axial direction, the first shaft 21 moves in the direction in which the pull stud 17 moves away from the second shaft, but at this time, the conical surface 21b. Thus, the angle between the tangent of the portion in contact with the rolling element 22 and the axis is forced to move in a loose direction. Therefore, the first shaft 21 is prevented from moving in the direction of decreasing the amount of compression of the disc spring 23, which leads to weakening the urging force of the disc spring 23, and the boosting effect is not weakened, and the self-locking function is achieved. Maintained.
クランプを外そうとする外力は前記のようにセルフロックされるため、転動体22はカラー26と第1の軸21の雄テーパ部に圧接されるので、当接面に圧痕がつかないようヘルツ応力が軽減される。転動体22の直径は大きいほうが良い。
転動体に樽形転動体を導入することにより許容負荷容量が飛躍的に伸び、プルスタッド17,コレット19,第2の軸18,第1の軸21の破壊荷重と比肩できることとなり、金型締結装置の小型化と長寿命化が可能となった。
Since the external force for removing the clamp is self-locked as described above, the rolling element 22 is pressed against the collar 26 and the male taper portion of the first shaft 21, so that the contact surface is not indented. Stress is reduced. The diameter of the rolling element 22 should be larger.
By introducing a barrel-shaped rolling element into the rolling element, the allowable load capacity is dramatically increased, and the breaking load of the pull stud 17, the collet 19, the second shaft 18, and the first shaft 21 can be compared with that of the die. It has become possible to reduce the size and life of the equipment.
従来の鋼球を採用した締結装置に比べ数倍のクランプ能力があり、セルフロック機構にしたため安全性の更なる向上が図れる。
筒体の採用により基準ピンを兼用可能となり省スペースと部品削減が図れる。
Compared to conventional fastening devices that use steel balls, it has several times the clamping ability, and a self-locking mechanism can further improve safety.
By adopting a cylindrical body, it can be used as a reference pin, saving space and reducing parts.
本発明のクランプ装置を含む金型締結装置の全体説明図であって、成形機械における固定金型と可動金型の一体化締結に使用した金型締結装置例である。BRIEF DESCRIPTION OF THE DRAWINGS It is whole explanatory drawing of the metal mold fastening apparatus containing the clamp apparatus of this invention, Comprising: It is the metal mold fastening apparatus example used for the integrated fastening of the fixed metal mold | die and a movable metal mold | die in a molding machine. 本発明の金型締結装置の断面説明図である。It is a section explanatory view of the metallic mold fastening device of the present invention. 図2の金型締結装置におけるセルフロック機構のクランプ状態の説明図である。It is explanatory drawing of the clamped state of the self-locking mechanism in the metal mold fastening apparatus of FIG. 図2の金型締結装置におけるセルフロック機構のアンクランプ状態の説明図である。It is explanatory drawing of the unclamped state of the self-locking mechanism in the metal mold fastening apparatus of FIG.
符号の説明Explanation of symbols
1 固定金型 2 可動金型
3 固定側プラテン 4 可動側プラテン
5 固定側主型 6 可動側主型
7 金型ロックシリンダ
8 金型締結装置 10 把持部
11 付勢手段 12 被把持部
13 規制手段 16 筒体 17 プルスタッド 18 第2の軸 19 コレット 20 リング状ばね 21 第1の軸 22 転動体 23 皿ばね 24 座金 25 ナット 26,28 カラー
1 fixed mold 2 movable mold 3 fixed side platen 4 movable side platen 5 fixed side main mold 6 movable side main mold 7 mold lock cylinder 8 mold fastening device 10 gripping part 11 biasing means 12 gripped part 13 regulating means 16 cylinder 17 pull stud 18 second shaft 19 collet 20 ring-shaped spring 21 first shaft 22 rolling element 23 disc spring 24 washer 25 nut 26, 28 collar

Claims (5)

  1. 成形機械において固定金型と可動金型とを締結する装置であって、前記固定金型または前記可動金型の何れか一方の金型に設けられた被把持部と、
    何れか他方の金型に設けられ前記被把持部を把持して前記他方の金型側に引き込むクランプ装置とからなり、
    前記他方の金型の当接面の反対面から軸端ドッグ部を押圧操作することにより前記一方の金型に対し接近・離隔する方向に移動可能な軸と、
    前記軸の前記一方の金型側の端部に係合連結されて前記一方の金型に設けられた前記被把持部を把持開放可能に開閉する複数個の把持部と、
    前記軸を前記一方の金型から離隔する方向に常時付勢する付勢手段と、
    前記軸が前記一方の金型から離隔する方向に移動したときに前記被把持部を把持した状態の前記把持部の外周を保持する内周面が筒状に形成され前記軸が一方の金型側への移動で前記把持部軸端が嵌り込んで前記被把持部の把持を開放する前記内周面より大径の溝が形成された規制手段とを含んでなり、
    固定金型と可動金型を一体金型として持ち運びできるようにしたことを特徴とする金型締結装置。
    An apparatus for fastening a fixed mold and a movable mold in a molding machine, a gripped portion provided on one of the fixed mold and the movable mold,
    A clamp device that is provided on any other mold and grips the gripped portion and pulls it toward the other mold;
    A shaft movable in a direction approaching and separating from the one mold by pressing the shaft end dog portion from the opposite surface of the contact surface of the other mold;
    A plurality of gripping portions for gripping releasably closing said gripped portion of said being engaged connected to an end portion of one of the mold side is provided on one of the mold the said shaft,
    A biasing means for constantly biasing the shaft in a direction away from the one mold;
    An inner peripheral surface that holds the outer periphery of the gripping portion in a state of gripping the gripped portion when the shaft moves in a direction away from the one mold is formed in a cylindrical shape, and the shaft is one mold And a regulating means in which a groove having a larger diameter than the inner peripheral surface is formed, in which the gripping portion shaft end is fitted by movement to the side and the gripping of the gripped portion is released .
    A mold fastening device characterized in that a fixed mold and a movable mold can be carried as a single mold.
  2. 前記規制手段の外周が、前記他方の金型から前記一方の金型側に突出して設けられ、前記一方の金型において前記規制手段と対向する部分に前記規制手段の本体外周と同形状で僅かに大きい穴が形成され、且つこの穴の底部に前記被把持部が取り付けられてなり、一方の金型と他方の金型との締結時に、規制手段と穴が係合することにより、一方の金型と他方の金型との当接面上の位置決めを行うことを特徴とする請求項1記載の金型締結装置。   The outer periphery of the restricting means is provided so as to protrude from the other mold to the one mold side, and a portion of the one mold facing the restricting means has the same shape as the outer periphery of the main body of the restricting means and slightly A large hole is formed, and the gripped portion is attached to the bottom of the hole, and when the one mold and the other mold are fastened, the restricting means and the hole engage with each other. 2. The mold fastening apparatus according to claim 1, wherein positioning is performed on a contact surface between the mold and the other mold.
  3. 前記軸が、
    前記付勢手段により前記一方の金型から離隔される方向に常時付勢されるとともに前記一方の金型側端部に外周環状溝が設けられた第1の軸と、
    前記一方の金型側に前記把持部を係合連結するとともに、前記他方の金型側において同一円周上に複数の穴が削設された円筒部分が、前記第1の軸と軸方向移動可能に嵌装する第2の軸と、
    前記複数の穴に転動可能に嵌装される前記円筒部分の肉厚より大きい直径の複数の転動体とからなり、
    前記規制手段の前記内周面には前記内周面より大径の内周環状溝が前記転動体と対応する位置に刻設され、
    前記第1の軸の外周環状溝は、その溝深さと前記第2の軸の円筒部分の肉厚との和が前記転動体の直径より大きい溝底部を有するとともに前記外周環状溝の途中から前記一方の金型側の端部の外径へ円錐状の面で結ばれる雄テーパ部が形成され、
    前記規制手段の内周環状溝は、その溝深さと前記円筒部分の肉厚との和が前記転動体の直径未満となる溝底部を有し、この溝底から前記一方の金型側へ円筒内周面に円錐面で結ばれる雌テーパ部が形成されており、
    前記雄テーパ部と前記雌テーパ部と前記転動体とからなる増力機構を構成していることを特徴とする請求項1又は2に記載の金型締結装置。
    The axis is
    A first shaft which is an outer peripheral annular groove provided in the mold-side end portion of the one with the always biased in a direction to be spaced apart from the mold of the one by the biasing means,
    With engaging coupling the gripper to the one of the mold side, the other cylindrical portion in which a plurality of holes on the same circumference in the mold side is Kezu設is axially moved to the first axis A second shaft to be fitted,
    A plurality of rolling elements having a diameter larger than the wall thickness of the cylindrical portion fitted in the plurality of holes so as to be able to roll;
    An inner peripheral annular groove having a larger diameter than the inner peripheral surface is engraved on the inner peripheral surface of the restricting means at a position corresponding to the rolling element ,
    The outer circumferential annular groove of the first shaft has a groove bottom portion in which the sum of the groove depth and the thickness of the cylindrical portion of the second shaft is larger than the diameter of the rolling element, and from the middle of the outer circumferential groove. A male taper portion is formed that is connected to the outer diameter of the end on one mold side by a conical surface,
    The inner circumferential annular groove of the restricting means has a groove bottom portion in which the sum of the groove depth and the thickness of the cylindrical portion is less than the diameter of the rolling element, and the cylinder extends from the groove bottom to the one mold side. A female taper portion connected by a conical surface is formed on the inner peripheral surface,
    3. The mold fastening device according to claim 1, wherein a force-increasing mechanism including the male taper portion, the female taper portion, and the rolling element is configured.
  4. 前記転動体が胴のふくれた樽形転動体であって、その軸線を通る胴体部の曲率半径が、前記内周環状溝の溝底部半径よりも僅かに小さく形成された請求項3に記載の金型締結装置。   The rolling element according to claim 3, wherein the rolling element is a barrel-shaped rolling element having a swollen body, and a radius of curvature of a body part passing through an axis thereof is formed slightly smaller than a groove bottom radius of the inner circumferential annular groove. Mold fastening device.
  5. 前記雄テーパ部の前記円錐状の面は、前記第1の軸の軸断面上で前記樽形転動体の断面半径より大きい半径の円弧を前記第1の軸線回りに回転させた回転面に形成されてなる請求項3又は4に記載の金型締結装置。

    The conical surface of the male taper portion is formed on a rotation surface obtained by rotating an arc having a radius larger than the cross-sectional radius of the barrel-shaped rolling element on the axial cross section of the first shaft around the first axis. The mold fastening apparatus according to claim 3 or 4, wherein the mold fastening apparatus is formed.

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