JP5531878B2

JP5531878B2 - Press machine

Info

Publication number: JP5531878B2
Application number: JP2010206314A
Authority: JP
Inventors: 賢正服部; 晃庸渡邊
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2010-09-15
Filing date: 2010-09-15
Publication date: 2014-06-25
Anticipated expiration: 2030-09-15
Also published as: CN102397920A; JP2012061485A; CN102397920B

Description

この発明は、左右一対のボールねじ機構により、ラムの左右両側部をそれぞれ個別に昇降させるプレスブレーキ等のプレス機械に関する。 The present invention relates to a press machine such as a press brake that lifts and lowers right and left sides of a ram individually by a pair of left and right ball screw mechanisms.

一般にプレスブレーキは、下端で上型を支持するラムが昇降自在に設けられ、このラムの左右両側部を左右一対の昇降駆動機構で昇降駆動させることで、上型とこの上型の下方に位置固定で設けた下型との協働で板材に曲げ加工を行う（例えば特許文献１）。曲げ加工の種類等によりラムに作用する荷重が左右でアンバランスになることがあり、この荷重のアンバランスを補正するために、ラムを左右傾斜させられるようになっているものが多い。しかし、ラムの昇降を案内する昇降ガイド機構は、ラムが左右傾斜していない中立姿勢の状態を基準にして設けられているため、ラムを左右傾斜させた場合、昇降時にラムが傾斜に沿って斜めに移動する可能性がある。よって、ラムが左右傾斜している場合でも、ラムを上下方向に直進させるように案内する手段を設ける必要がある。また、昇降駆動機構が、回転駆動源の回転動作をボールねじ機構で上下方向の進退動作に変換する構成である場合、ボールねじ機構のねじ軸とナットのうち進退動作を行う進退部品が、回転動作を行う回転部品と共に回転するのを防ぐ手段を設ける必要がある。 In general, a press brake is provided with a ram that supports the upper die at the lower end so that it can be raised and lowered, and the left and right sides of the ram are moved up and down by a pair of left and right lifting drive mechanisms, so that the upper die and the upper die are positioned below the upper die. The plate material is bent in cooperation with the fixed lower mold (for example, Patent Document 1). The load acting on the ram may be unbalanced on the left and right depending on the type of bending, etc. In order to correct this load unbalance, the ram can often be tilted left and right. However, the lifting guide mechanism that guides the raising and lowering of the ram is provided based on the neutral posture in which the ram is not tilted left and right. There is a possibility of moving diagonally. Therefore, it is necessary to provide a means for guiding the ram to move straight up and down even when the ram is inclined to the left and right. In addition, when the elevating drive mechanism is configured to convert the rotation operation of the rotation drive source into the vertical advance / retreat operation by the ball screw mechanism, the advance / retreat component that performs the advance / retreat operation of the screw shaft and nut of the ball screw mechanism is rotated. There is a need to provide means to prevent rotation with the rotating parts performing the operation.

特開２００９−１１９５１９号公報JP 2009-119519 A

従来のプレスブレーキにも、ラムを直進させるように案内する手段を設けたものがあるが、その構造が複雑で、部品点数が多かった。また、ボールねじ機構の進退部品の供回りを防止する手段を設けたものもあるが、供回りを確実に防ぐことの信頼性が乏しかった。さらに、ラムの位置調整をした場合、上記供回りを防止する手段を調整する必要があるが、その調整が難しかった。 Some conventional press brakes are provided with means for guiding the ram so as to go straight, but the structure is complicated and the number of parts is large. Moreover, although there is a device provided with means for preventing the rotation of the ball screw mechanism, the reliability of reliably preventing the rotation is poor. Furthermore, when adjusting the position of the ram, it is necessary to adjust the means for preventing the rotation, but this adjustment is difficult.

この発明の目的は、簡素な構成でありながら、ラムを左右傾斜させた場合でもラムを上下方向に直進させることができ、ラムを昇降させるためのボールねじ機構の進退部品が回転部品に対して供回りするのを防ぐことができるプレス機械を提供することである。
この発明の他の目的は、ラムを直進させるための直進ガイド機構の部品点数を少なくすることである。
この発明のさらに他の目的は、ラムを左右傾斜させてもボールねじ機構の進退部品とラムとの連結を良好な状態に保つことができ、ラムの位置調整をしたときに行う調整が容易で、ボールねじ機構の進退部品の供回りを確実に防ぐことである。 An object of the present invention is to have a simple configuration, and even when the ram is tilted left and right, the ram can be moved straight up and down, and the advancing and retracting parts of the ball screw mechanism for raising and lowering the ram are relative to the rotating parts. It is to provide a press machine that can prevent rotation.
Another object of the present invention is to reduce the number of parts of a linear guide mechanism for linearly moving a ram.
Still another object of the present invention is to maintain good connection between the advancing and retracting parts of the ball screw mechanism and the ram even when the ram is tilted left and right, and the adjustment performed when adjusting the position of the ram is easy. It is to reliably prevent the advancement and retraction of the ball screw mechanism.

この発明のプレス機械は、左右方向に延びた下型が設置された本体フレームと、この本体フレームに対して左右両端で昇降ガイド機構を介して昇降可能に支持されて下端に前記下型に対向する左右方向に延びた上型が取付けられたラムと、前記本体フレームに設けられた左右一対の昇降用回転駆動源と、各昇降用回転駆動源の回転動作を上下方向の進退運動に変換して前記ラムの左右両端部を個別に昇降させる左右一対のボールねじ機構とを備え、前記昇降ガイド機構は、前記ラムの左右傾斜を許容する。このプレス機械において、前記各ボールねじ機構のねじ軸とナットのうち進退動作を行う進退部品と前記本体フレームまたはラムとを、前記進退部品の軸心回りの相対回転を阻止した状態、かつ前記ラムの左右傾斜を許容した状態で連結する回転阻止・傾斜許容連結機構を設け、前記本体フレームと前記ラムとの間に、前記ラムの左右方向の移動を規制する直進ガイド機構を設けた。 The press machine according to the present invention has a main body frame in which a lower mold extending in the left-right direction is installed, and is supported by the left and right ends of the main body frame through a lifting guide mechanism so as to be movable up and down, and opposed to the lower mold at a lower end. The ram to which the upper mold extending in the left-right direction is attached, the pair of left and right lifting rotary drive sources provided on the main body frame, and the rotational operation of each lifting rotary drive source are converted into vertical movements. And a pair of left and right ball screw mechanisms for individually raising and lowering the left and right ends of the ram, and the raising and lowering guide mechanism allows the ram to be tilted left and right. In this press machine, the advancing / retreating part that performs the advancing / retreating operation of the screw shaft and nut of each ball screw mechanism and the main body frame or the ram are prevented from being relatively rotated about the axis of the advancing / retreating part, and the ram A rotation preventing / tilting allowable coupling mechanism is provided for coupling in a state in which the horizontal tilt is allowed, and a rectilinear guide mechanism is provided between the main body frame and the ram so as to restrict the lateral movement of the ram.

この構成によると、左右一対の昇降用回転駆動源を駆動すると、それぞれの回転動作がボールねじ機構により上下方向の進退操作に変換されて、ラムの左右両端部を個別に昇降させる。このとき、ラムは昇降ガイド機構により案内される。昇降ガイド機構はラムの左右傾斜を許容するため、左右のボールねじ機構の動作位置を異ならせることで、ラムを左右傾斜させることができる。直進ガイド機構によりラムの左右方向の移動を規制しているため、ラムを左右傾斜させた場合でも、ラムが真っ直ぐ上下に移動させられる。回転阻止・傾斜許容連結機構により、ボールねじ機構の進退部品と本体フレームまたはラムとを、進退部品の軸心回りの相対回転を阻止した状態で連結しているため、ボールねじ機構の進退部品が回転部品に対して供回りするのを防ぐことができる。また、回転阻止・傾斜許容連結機構により、ボールねじ機構の進退部品とラムとを、ラムの左右傾斜を許容した状態で連結しているため、ラムを左右傾斜させても、ボールねじ機構の進退動作をラムに良好に伝達できる。 According to this configuration, when the pair of right and left rotating drive sources for raising and lowering are driven, the respective rotational operations are converted into the up and down operation by the ball screw mechanism, and the left and right ends of the ram are individually raised and lowered. At this time, the ram is guided by the lifting guide mechanism. Since the elevating guide mechanism allows the ram to be tilted to the left and right, the ram can be tilted to the left and right by changing the operating positions of the left and right ball screw mechanisms. Since the movement of the ram in the left-right direction is regulated by the straight guide mechanism, the ram can be moved straight up and down even when the ram is tilted left and right. The anti-rotation / tilting allowance coupling mechanism connects the advancing / retreating part of the ball screw mechanism and the body frame or ram in a state where relative rotation around the axis of the advancing / retreating part is blocked, so that the advancing / retreating part of the ball screw mechanism It is possible to prevent the rotating parts from being rotated. In addition, because the anti-rotation / tilting allowance coupling mechanism connects the advancing / retreating part of the ball screw mechanism and the ram while allowing the ram to tilt horizontally, the ball screw mechanism can move forward and backward even when the ram is tilted left and right. The motion can be transmitted to the ram well.

この発明において、前記昇降ガイド機構は、前記ラムの左右両端部にそれぞれ対向させて前記本体フレームに固定して設けられた左右一対の昇降ガイドと、前記ラムの左右両端部にそれぞれ設けられ、前記昇降ガイドにより前後方向に規制されてラムと共に昇降自在な昇降部材とを有し、前記直進ガイド機構は、前記左右一対の昇降ガイドと、前記ラムの左右両端部にそれぞれ設けられて、各昇降ガイドにより左右方向に規制されてそれぞれ移動する左右一対の移動体とを有するのが良い。
この構成であると、昇降ガイド機構の昇降ガイドを直進ガイド機構の一部として利用するため、直進ガイド機構の部品点数を減らすことができる。 In the present invention, the elevating guide mechanism is provided at a pair of left and right elevating guides provided to be fixed to the main body frame so as to oppose the left and right end portions of the ram, and provided at both left and right end portions of the ram, The elevating member is controlled in the front-rear direction by the elevating guide and is movable up and down together with the ram, and the linear guide mechanism is provided at each of the pair of left and right elevating guides and the left and right end portions of the ram, It is preferable to have a pair of left and right moving bodies that are regulated in the left and right directions and move respectively.
With this configuration, the elevating guide of the elevating guide mechanism is used as part of the rectilinear guide mechanism, so the number of parts of the rectilinear guide mechanism can be reduced.

この発明において、前記回転阻止・傾斜許容連結機構は、前記ボールねじ機構の前記進退部品に前後および左右方向に位置変更可能に取付けられ、中心軸が前後方向に沿った円筒面または球面の一部からなる案内面を有する傾斜案内部材と、前記ラムに形成され前記案内面に摺動自在に接する被案内面を含む被案内面形成部と、前記傾斜案内部材の回転を規制する規制部材とを有していても良い。 In the present invention, the rotation preventing / tilting allowable coupling mechanism is attached to the advance / retreat part of the ball screw mechanism so that the position can be changed in the front-rear and left-right directions, and the central axis is a part of a cylindrical surface or spherical surface along the front-rear direction. An inclined guide member having a guide surface, a guided surface forming portion including a guided surface formed on the ram and slidably in contact with the guide surface, and a regulating member for restricting rotation of the inclined guide member. You may have.

ボールねじ機構の進退部品に取付けられた傾斜案内部材とラムの被案内面形成部とが、円筒面または球面の一部からなる案内面と被案内面とで互いに接しているため、ラムの左右傾斜を変更しても傾斜案内部材とラムが互いに接触した状態のままに保たれる。このため、ボールねじ機構の進退部品の進退動作がラムに良好に伝達される。本体フレームに対するラムの取付位置や姿勢を調整すると、ボールねじ機構の進退部品と傾斜案内部材の位置関係が変わるが、傾斜案内部材はボールねじ機構の進退部品に前後および左右方向に位置変更可能に取付けられているため、ラムの取付位置や姿勢を容易に調整することができる。また、傾斜案内部材は規制部材により回転が規制されているため、進退部品の供回りを確実に防ぐことができる。 The inclined guide member attached to the advancing / retracting part of the ball screw mechanism and the guided surface forming portion of the ram are in contact with each other at the guide surface and the guided surface, which are part of a cylindrical surface or a spherical surface. Even if the inclination is changed, the inclination guide member and the ram are kept in contact with each other. For this reason, the advancing / retreating operation of the advancing / retreating part of the ball screw mechanism is well transmitted to the ram. Adjusting the mounting position and orientation of the ram with respect to the main body frame changes the positional relationship between the advancing / retreating part of the ball screw mechanism and the tilt guide member, but the tilt guide member can be repositioned in the front / rear and left / right directions with respect to the advancing / retreating part of the ball screw mechanism. Since it is attached, the attachment position and posture of the ram can be easily adjusted. Further, since the rotation of the inclined guide member is restricted by the restricting member, it is possible to reliably prevent the forward / backward parts from rotating.

この発明のプレス機械は、左右方向に延びた下型が設置された本体フレームと、この本体フレームに対して左右両端で昇降ガイド機構を介して昇降可能に支持されて下端に前記下型に対向する左右方向に延びた上型が取付けられたラムと、前記本体フレームに設けられた左右一対の昇降用回転駆動源と、各昇降用回転駆動源の回転動作を上下方向の進退運動に変換して前記ラムの左右両端部を個別に昇降させる左右一対のボールねじ機構とを備え、前記昇降ガイド機構は、前記ラムの左右傾斜を許容するものにおいて、前記各ボールねじ機構のねじ軸とナットのうち進退動作を行う進退部品と前記本体フレームまたはラムとを、前記進退部品の軸心回りの相対回転を阻止した状態、かつ前記ラムの左右傾斜を許容した状態で連結する回転阻止・傾斜許容連結機構を設け、前記本体フレームと前記ラムとの間に、前記ラムの左右方向の移動を規制する直進ガイド機構を設けたため、簡素な構成でありながら、ラムを左右傾斜させた場合でもラムを上下方向に直進させることができ、ラムを昇降させるためのボールねじ機構の進退部品が回転部品に対して供回りするのを防ぐことができる。 The press machine according to the present invention has a main body frame in which a lower mold extending in the left-right direction is installed, and is supported by the left and right ends of the main body frame through a lifting guide mechanism so as to be movable up and down, and opposed to the lower mold at a lower end. The ram to which the upper mold extending in the left-right direction is attached, the pair of left and right lifting rotary drive sources provided on the main body frame, and the rotational operation of each lifting rotary drive source are converted into vertical movements. A pair of left and right ball screw mechanisms that individually raise and lower the left and right ends of the ram, and the elevating guide mechanism allows the right and left inclination of the ram. The rotation prevention which connects the advancing / retreating part which performs advancing / retreating operation and the main body frame or the ram in a state where the relative rotation around the axis of the advancing / retreating part is inhibited and the right / left inclination of the ram is allowed. Even if the ram is tilted to the left or right, it has a simple structure because it is provided with a tilt allowing connection mechanism and a linear guide mechanism is provided between the main body frame and the ram to restrict the movement of the ram in the left-right direction. The ram can be moved straight up and down, and the advancing and retreating parts of the ball screw mechanism for raising and lowering the ram can be prevented from rotating around the rotating parts.

前記昇降ガイド機構は、前記ラムの左右両端部にそれぞれ対向させて前記本体フレームに固定して設けられた左右一対の昇降ガイドと、前記ラムの左右両端部にそれぞれ設けられ、前記昇降ガイドにより前後方向に規制されてラムと共に昇降自在な昇降部材とを有し、前記直進ガイド機構は、前記左右一対の昇降ガイドと、前記ラムの左右両端部にそれぞれ設けられて、各昇降ガイドにより左右方向に規制されてそれぞれ移動する左右一対の移動体とを有する場合は、直進ガイド機構の部品点数を少なくできる。 The elevating guide mechanism is provided at a pair of left and right elevating guides fixed to the body frame so as to oppose the left and right end portions of the ram, and provided at both left and right end portions of the ram. The linear guide mechanism is provided at each of the pair of left and right lift guides and the left and right ends of the ram, and is moved in the left and right directions by the lift guides. In the case of having a pair of left and right moving bodies that are regulated and move respectively, the number of parts of the linear guide mechanism can be reduced.

前記回転阻止・傾斜許容連結機構は、前記ボールねじ機構の前記進退部品に前後および左右方向に位置変更可能に取付けられ、中心軸が前後方向に沿った円筒面または球面の一部からなる案内面を有する傾斜案内部材と、前記ラムに形成され前記案内面に摺動自在に接する被案内面を含む被案内面形成部と、前記傾斜案内部材の傾斜案内部材の回転を規制する規制部材とを有する場合は、ラムを左右傾斜させてもボールねじ機構の進退部品とラムとの連結を良好な状態に保つことができ、ラムの位置調整をしたときに行う調整が容易で、ボールねじ機構の進退部品の供回りを確実に防ぐことができる。 The rotation preventing / tilting allowable coupling mechanism is attached to the forward / backward moving part of the ball screw mechanism so that the position can be changed in the front-rear and left-right directions, and the guide surface is a cylindrical surface or a part of a spherical surface whose central axis is along the front-rear direction. An inclined guide member having a guided surface including a guided surface formed on the ram and slidably in contact with the guide surface, and a restricting member that restricts rotation of the inclined guide member of the inclined guide member. If the ram is inclined, the connection between the ram and the advancing / retreating part of the ball screw mechanism and the ram can be kept in a good state even when the ram is tilted left and right. It is possible to reliably prevent the advancement / retraction parts from rotating.

この発明の一実施形態にかかるプレス機械の正面図である。It is a front view of the press machine concerning one Embodiment of this invention. 同プレス機械の一部破断側面図である。It is a partially broken side view of the press machine. （Ａ）は同プレス機械のボールねじ機構の進退部品とラムとの連結部の正面図、（Ｂ）はその一部の断面図、（Ｃ）は同連結部の破断側面図である。(A) is a front view of the connecting part between the advancing / retreating part of the ball screw mechanism of the press machine and the ram, (B) is a partial sectional view, and (C) is a cutaway side view of the connecting part. （Ａ）は同プレス機械の昇降ガイド機構の上昇降ガイド部の側面図、（Ｂ）はその平面図、（Ｃ）はその背面図である。(A) is the side view of the upper raising / lowering guide part of the raising / lowering guide mechanism of the press machine, (B) is the top view, (C) is the back view. （Ａ）は同昇降ガイド機構の下昇降ガイド部の側面図、（Ｂ）はその平面図、（Ｃ）はその背面図である。(A) is a side view of a lower lifting guide portion of the lifting guide mechanism, (B) is a plan view thereof, and (C) is a rear view thereof. （Ａ）は異なる実施形態にかかるプレス機械の正面図、（Ｂ）はその一部の平面図である。(A) is a front view of the press machine concerning different embodiment, (B) is the one part top view. （Ａ）は参考例としてのプレス機械のボールねじ機構の進退部品とラムとの連結部の正面図、（Ｂ）はその破断側面図である。(A) is the front view of the connection part of the advancing / retreating part and ram of the ball screw mechanism of the press machine as a reference example, (B) is the fracture | rupture side view.

この発明の一実施形態を図面と共に説明する。図１はこの実施形態にかかるプレス機械の正面図、図２はその一部破断側面図である。このプレス機械はプレスブレーキであって、本体フレーム１の前面側に、固定側の金型である下型２を支持するテーブル３と、可動側の金型である上型４を支持するラム６とが設けられている。テーブル３は、本体フレーム１に対し位置固定である。よって、下型２は、テーブル３を介して本体フレーム１に設置されている。ラム６は、本体フレーム１に対し左右両側部で昇降ガイド機構７により昇降可能に支持され、左右一対の昇降駆動機構８により左右両側部がそれぞれ個別に昇降駆動される。本体フレーム１は、左右一対の側板１ａと、これら左右の側板１ａの上部同士を連結する連結フレーム部１ｂとで構成され、連結フレーム部１ｂに前記左右の昇降駆動機構８が設けられている。 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a press machine according to this embodiment, and FIG. 2 is a partially broken side view thereof. This press machine is a press brake. On the front side of the main body frame 1, a table 3 that supports a lower mold 2 that is a fixed mold and a ram 6 that supports an upper mold 4 that is a movable mold. And are provided. The table 3 is fixed in position relative to the main body frame 1. Therefore, the lower mold 2 is installed on the main body frame 1 via the table 3. The ram 6 is supported by a lifting guide mechanism 7 on both left and right sides of the main body frame 1 so that the ram 6 can be raised and lowered individually by a pair of left and right lifting drive mechanisms 8. The main body frame 1 is composed of a pair of left and right side plates 1a and a connecting frame portion 1b that connects upper portions of the left and right side plates 1a. The left and right lifting drive mechanisms 8 are provided on the connecting frame portion 1b.

上下の金型２，４はいずれも左右方向に長く、下型２は成形用の凹部２ａ（図２）を有し、上型４は前記凹部２ａに進入する先端部分４ａ（図２）を有する。図例では、上型４は、左右方向に並ぶ複数の上型ホルダ５を介してラム６に取付けられている。左右の昇降駆動機構８の駆動でラム６を下降させ、下型２の凹部２ａに上型４の先端部分４ａを進入させることで、下型２の上に載置された板材ワークＷをＶ字状に曲げ加工する。 The upper and lower molds 2, 4 are both long in the left-right direction, the lower mold 2 has a molding recess 2a (FIG. 2), and the upper mold 4 has a tip portion 4a (FIG. 2) that enters the recess 2a. Have. In the illustrated example, the upper die 4 is attached to the ram 6 via a plurality of upper die holders 5 arranged in the left-right direction. The ram 6 is lowered by driving the left and right elevating drive mechanism 8 and the tip portion 4a of the upper die 4 is advanced into the recess 2a of the lower die 2 so that the plate material workpiece W placed on the lower die 2 is moved to V Bend into a letter shape.

図２に示すように、昇降駆動機構８は、正逆両方向に選択的に回転可能な回転駆動源１０と、この回転駆動源１０により駆動されるボールねじ機構１１とを有する。回転駆動源１０は、例えばサーボモータである。ボールねじ機構１１は、上下方向に沿うねじ軸１２と、このねじ軸１２に、内蔵のボール（図示せず）を介して螺合するナット１３とでなる。ナット１３は、連結フレーム部１ｂに固定の軸受ハウジング１４に、複数の軸受１５により回転自在に支持されており、ベルト伝動装置１６を介して回転駆動源１０の駆動力で回転させられる。ナット１３が回転することにより、ねじ軸１２が上下に進退する。すなわち、この例では、ねじ軸１２がボールねじ機構１１の進退部品であり、ナット１３が回転部品である。ねじ軸１２を回転部品、かつナット１３を進退部品としても良い。 As shown in FIG. 2, the elevating drive mechanism 8 includes a rotary drive source 10 that can selectively rotate in both forward and reverse directions, and a ball screw mechanism 11 that is driven by the rotary drive source 10. The rotational drive source 10 is a servo motor, for example. The ball screw mechanism 11 includes a screw shaft 12 extending in the vertical direction and a nut 13 screwed onto the screw shaft 12 via a built-in ball (not shown). The nut 13 is rotatably supported by a plurality of bearings 15 on a bearing housing 14 fixed to the connection frame portion 1b, and is rotated by a driving force of the rotational driving source 10 via a belt transmission device 16. As the nut 13 rotates, the screw shaft 12 moves up and down. That is, in this example, the screw shaft 12 is a forward / backward part of the ball screw mechanism 11 and the nut 13 is a rotary part. The screw shaft 12 may be a rotating part and the nut 13 may be an advancing / retracting part.

図３に、ボールねじ機構１１のねじ軸１２とラム６との連結部を示す。この連結部は、ボールねじ機構１１の進退部品であるねじ軸１２とラム６とを、ねじ軸１２の軸心回りの相対回転を阻止した状態、かつラム６の左右傾斜を許容した状態で連結する回転阻止・傾斜許容連結機構１９を構成する。 FIG. 3 shows a connecting portion between the screw shaft 12 of the ball screw mechanism 11 and the ram 6. This connecting portion connects the screw shaft 12 and the ram 6 which are advance / retreat parts of the ball screw mechanism 11 in a state where relative rotation around the axis of the screw shaft 12 is prevented and the right and left inclination of the ram 6 is allowed. The rotation preventing / tilting allowable coupling mechanism 19 is configured.

ねじ軸１２の下端には、ブロック状の下端部材２０が一体に取付けられている。下端部材２０も、ボールねじ機構１１の進退部品とみなされる。ラム６の左右両側部の上端には上方に開口する切欠き２１が形成され、この切欠き２１内に上記下端部材２０が位置している。切欠き２１は形成されてなくてもよい。ラム６の切欠き２１の周辺部は、他の部分よりも肉厚の薄い薄肉部２２とされている。そして、薄肉部２２の下方でねじ軸１２の軸心上に位置する箇所に、正面側と背面側とに連通する円形孔２３が形成され、この円形孔２３に連結ピン２４が前後に貫通して設けられている。連結ピン２４は、前後両端部の下部に平面状の欠如部２４ａが形成された円柱形状をしており、前記欠如部２４ａから上方に抜ける前後一対の貫通孔２５を有する。各貫通孔２５には連結ボルト２６が上向きに挿通され、その連結ボルト２６の先端ねじ部２６ａが下端部材２０のねじ孔２０ａにねじ込まれている。連結ピン２４の欠如部２４ａと連結ボルト２６の頭部２６ｂとの間には、座金２７と皿ばね２８とを介在させてある。これにより、下端部材２０とラム６とが、連結ピン２４、連結ボルト２６等を介して互いに連結される。 A block-like lower end member 20 is integrally attached to the lower end of the screw shaft 12. The lower end member 20 is also regarded as an advance / retreat part of the ball screw mechanism 11. A notch 21 that opens upward is formed at the upper ends of the left and right sides of the ram 6, and the lower end member 20 is located in the notch 21. The notch 21 may not be formed. A peripheral portion of the notch 21 of the ram 6 is a thin portion 22 that is thinner than the other portions. A circular hole 23 communicating with the front side and the back side is formed at a position located on the axis of the screw shaft 12 below the thin wall portion 22, and the connecting pin 24 penetrates forward and backward through the circular hole 23. Is provided. The connecting pin 24 has a cylindrical shape in which a planar lacking portion 24a is formed at the lower part of both front and rear end portions, and has a pair of front and rear through holes 25 that pass upward from the lacking portion 24a. A connecting bolt 26 is inserted upward into each through hole 25, and a tip screw portion 26 a of the connecting bolt 26 is screwed into the screw hole 20 a of the lower end member 20. A washer 27 and a disc spring 28 are interposed between the lacking portion 24 a of the connecting pin 24 and the head portion 26 b of the connecting bolt 26. Thereby, the lower end member 20 and the ram 6 are mutually connected via the connecting pin 24, the connecting bolt 26, and the like.

また、下端部材２０の下端には、下面がラム６を案内する案内面３０になった傾斜案内部材３１が取付けられている。図例の案内面３０は、中心軸が前後方向に沿った円筒面の一部からなり、下に凸形状である。案内面３０は上に凸形状の円筒面であってもよい。また、案内面３０は球面であってもよい。一方、ラム６の切欠き２１の底部には、前記案内面３０に対応して、中心軸が前後方向に沿った円筒面の一部からなり上に凹形状の被案内面３２が形成されている。下端部材２０とラム６が連結された状態では、案内面３０と被案内面３２が互いに摺動自在に接している。傾斜案内部材３１と、被案内面３２を含むラム６の被案内面形成部６ａとで、ラム６の左右傾斜を調整する傾斜調整手段３３を構成する。 An inclined guide member 31 having a lower surface serving as a guide surface 30 for guiding the ram 6 is attached to the lower end of the lower end member 20. The guide surface 30 in the example is a part of a cylindrical surface whose central axis extends along the front-rear direction, and has a convex shape downward. The guide surface 30 may be an upward convex cylindrical surface. The guide surface 30 may be a spherical surface. On the other hand, at the bottom of the notch 21 of the ram 6, a guided surface 32 having a concave shape is formed on the top, corresponding to the guide surface 30, the center axis being a part of a cylindrical surface along the front-rear direction. Yes. In a state where the lower end member 20 and the ram 6 are connected, the guide surface 30 and the guided surface 32 are slidably in contact with each other. The inclination guide member 31 and the guided surface forming portion 6 a of the ram 6 including the guided surface 32 constitute an inclination adjusting means 33 that adjusts the right and left inclination of the ram 6.

下端部材２０への傾斜案内部材３１の取付けは、下端部材２０の上下貫通孔２０ｂに上から挿通された取付ボルト３５の先端ねじ部３５ａを、傾斜案内部材３１のねじ孔３１ａにねじ込むことで行う。上下貫通孔２０ｂは内径が取付ボルト３５の外径よりも大きいルーズ孔であり、上下貫通孔２０ｂ内での取付ボルト３５の水平方向位置をずらすことにより、下端部材２０に対する傾斜案内部材３１の前後方向および左右方向の位置を変更することができる。 The inclined guide member 31 is attached to the lower end member 20 by screwing the tip screw portion 35a of the mounting bolt 35 inserted from above into the upper and lower through holes 20b of the lower end member 20 into the screw hole 31a of the inclined guide member 31. . The upper and lower through holes 20b are loose holes having an inner diameter larger than the outer diameter of the mounting bolt 35. By shifting the horizontal position of the mounting bolt 35 in the upper and lower through holes 20b, the front and rear of the inclined guide member 31 with respect to the lower end member 20 The position in the direction and the left-right direction can be changed.

ボールねじ機構１１が正しく動作するために、進退部品であるねじ軸１２とラム６とが、ねじ軸１２の軸心回りに相対回転するのを規制する回転規制手段３６が設けられている。この例では、回転規制手段３６は、傾斜案内部材３１を前後両側から挟んで傾斜案内部材３１の回転を規制する板状の規制部材３７からなる。規制部材３７は、固定ボルト３８によりラム６の薄肉部２２に固定されている。 In order for the ball screw mechanism 11 to operate correctly, there is provided a rotation restricting means 36 that restricts relative rotation of the screw shaft 12 and the ram 6, which are advancing and retracting parts, about the axis of the screw shaft 12. In this example, the rotation restricting means 36 includes a plate-like restricting member 37 that restricts the rotation of the tilt guide member 31 with the tilt guide member 31 sandwiched from both front and rear sides. The restricting member 37 is fixed to the thin portion 22 of the ram 6 by a fixing bolt 38.

図１の正面図に示すように、左右の昇降ガイド機構７は、それぞれ上昇降ガイド部７Ａと下昇降ガイド部７Ｂとでなる。図４（Ａ），（Ｂ），（Ｃ）はそれぞれ右側の上昇降ガイド部７Ａの側面図、平面図、および背面図、図５（Ａ），（Ｂ），（Ｃ）はそれぞれ右側の下昇降ガイド部７Ｂの側面図、平面図、および背面図である。また、図３（Ａ）には、右側の上昇降ガイド部７Ａが主に破線で示されている。 As shown in the front view of FIG. 1, the left and right lifting guide mechanisms 7 include an upper lifting guide portion 7A and a lower lifting guide portion 7B, respectively. 4A, 4B, and 4C are a side view, a plan view, and a rear view, respectively, of the right upper lifting guide portion 7A, and FIGS. 5A, 5B, and 5C are the right side and the right side, respectively. It is a side view, a top view, and a rear view of the lower lifting guide portion 7B. Further, in FIG. 3A, the upper lifting guide portion 7A on the right side is mainly indicated by a broken line.

上下の昇降ガイド部７Ａ，７Ｂはいずれも、ラム６の左右両端縁にそれぞれ対向させて本体フレーム１に固定して設けられた上下に長い断面矩形の板状の昇降ガイド４０と、ラム６の左右端に設けられ、前記昇降ガイド４０を前後両側から挟んだ状態でラム６と共に昇降可能な前後一対の昇降部材４１とを有する。この例では、昇降部材４１はローラであり、左右方向に沿うローラ支持軸４２のローラ支持軸部４２ａに回転自在に支持されている。ローラ支持軸４２は、その嵌合軸部４２ｂが、ラム６の背面にボルト４３で固定された支持部材４４に回転拘束状態で嵌合している。 Both the upper and lower lifting guide portions 7A and 7B are fixed to the main body frame 1 so as to face the left and right edges of the ram 6, respectively, A pair of front and rear elevating members 41 provided at the left and right ends and capable of elevating together with the ram 6 with the elevating guide 40 sandwiched from both front and rear sides. In this example, the elevating member 41 is a roller and is rotatably supported by the roller support shaft portion 42a of the roller support shaft 42 along the left-right direction. The roller support shaft 42 has a fitting shaft portion 42 b fitted in a rotationally restrained state to a support member 44 fixed to the back surface of the ram 6 with a bolt 43.

上昇降ガイド部７Ａの前後の昇降部材４１を支持する各ローラ支持軸４２（１），４２（２）、および下昇降ガイド部７Ｂの後側の昇降部材４１を支持するローラ支持軸４２（３）は、ローラ支持軸部４２ａと嵌合軸部４２ｂとが互いに偏心している。つまり、ローラ支持軸部４２ａの軸心４２ａａと嵌合軸部４２ｂの軸心４２ｂａとがずれている。よって、これらローラ支持軸４２については、支持部材４４に対する嵌合軸部４２ｂの位相を変えることにより、ローラ支持部４２ａの前後位置、すなわち昇降部材４１の前後位置が変更される。このように昇降部材４１の前後位置を調整することで、ラム６の前後傾斜を微調整することができる。なお、下昇降ガイド部７Ｂの前側の昇降部材４１を支持するローラ支持軸４２（４）は、ローラ支持軸部４２ａと嵌合軸部４２ｂとが互いに同心である。 The roller support shafts 42 (1), 42 (2) for supporting the lift members 41 before and after the upper lift guide portion 7A, and the roller support shafts 42 (3) for supporting the lift member 41 on the rear side of the lower lift guide portion 7B. ), The roller support shaft portion 42a and the fitting shaft portion 42b are eccentric from each other. That is, the shaft center 42aa of the roller support shaft portion 42a and the shaft center 42ba of the fitting shaft portion 42b are shifted. Therefore, with respect to these roller support shafts 42, the front-rear position of the roller support portion 42a, that is, the front-rear position of the elevating member 41 is changed by changing the phase of the fitting shaft portion 42b with respect to the support member 44. By adjusting the front / rear position of the elevating member 41 in this way, the front / rear inclination of the ram 6 can be finely adjusted. In the roller support shaft 42 (4) that supports the lifting member 41 on the front side of the lower lifting guide portion 7B, the roller support shaft portion 42a and the fitting shaft portion 42b are concentric with each other.

さらに、上昇降ガイド部７Ａの支持部材４４には小支持部材４５が取付ボルト４６で取付けられ、この小支持部材４５に、ローラからなる移動体４７が前後方向の軸心回りに回転自在に支持されている。移動体４７は、前記昇降ガイド４０の左右方向の内側面に接している。ラム６が左右傾斜していない中立姿勢にあるとき、移動体４７の軸心Ｏ１（図３（Ａ）)は、前記傾斜案内部材３１の円筒状案内面３１の中心Ｏ２（図３（Ａ））と同じ高さに設定してある。移動体４７と昇降ガイド４０とで、ラム６の左右方向の移動を規制してラム６を真っ直ぐ上下方向に移動するように案内する直進ガイド機構４８を構成する。 Further, a small support member 45 is attached to the support member 44 of the upper elevating guide portion 7A with a mounting bolt 46, and a movable body 47 made of a roller is supported on the small support member 45 so as to be rotatable about a longitudinal axis. Has been. The moving body 47 is in contact with the inner side surface of the elevating guide 40 in the left-right direction. When the ram 6 is in a neutral posture that is not inclined left and right, the axis O1 (FIG. 3A) of the moving body 47 is the center O2 of the cylindrical guide surface 31 of the inclined guide member 31 (FIG. 3A). ) Is set to the same height. The moving body 47 and the raising / lowering guide 40 constitute a linear guide mechanism 48 that restricts the movement of the ram 6 in the left-right direction and guides the ram 6 to move straight up and down.

前記小支持部材４５は、支持部材４４の上面に形成された左右方向の溝５０に沿って摺動自在で、位置決めボルト５１の先端を小支持部材４５の昇降ガイド４０と反対側の端面に押し当てることで、小支持部材４５の左右方向の位置決めをする。位置決めボルト５１は、支持部材４４に固定の位置決めボルト取付部材５２に取付けられている。前記取付ボルト４６が挿通される小支持部材４５の孔４５ａはルーズ孔であり、小支持部材４５の左右方向の位置の変化に対応できる。 The small support member 45 is slidable along a horizontal groove 50 formed on the upper surface of the support member 44, and pushes the tip of the positioning bolt 51 against the end surface of the small support member 45 opposite to the lifting guide 40. By the contact, the small support member 45 is positioned in the left-right direction. The positioning bolt 51 is attached to a positioning bolt attachment member 52 fixed to the support member 44. The hole 45a of the small support member 45 through which the mounting bolt 46 is inserted is a loose hole and can cope with a change in the position of the small support member 45 in the left-right direction.

このプレス機械は、左右一対の昇降駆動機構８によりラム６の左右両側部をそれぞれ個別に昇降駆動して、ラム６を昇降させる。各昇降駆動機構８は、回転阻止・傾斜許容連結機構１９の回転規制手段３６により、ボールねじ機構１１のねじ軸１２とラム６とがねじ軸１２の軸心回りに相対回転するのを規制しているため、昇降用回転駆動源１０の回転を確実に進退動作に変換して、ラム６を昇降させることができる。 In this press machine, the left and right sides of the ram 6 are individually lifted and lowered by a pair of left and right lifting drive mechanisms 8 to raise and lower the ram 6. Each elevating drive mechanism 8 restricts relative rotation of the screw shaft 12 of the ball screw mechanism 11 and the ram 6 about the axis of the screw shaft 12 by the rotation restricting means 36 of the rotation preventing / tilting allowable coupling mechanism 19. Therefore, the rotation of the ascending / descending rotary drive source 10 can be reliably converted into the advancing / retreating operation, and the ram 6 can be raised and lowered.

昇降ガイド機構７により、上記ラム６の昇降時、左右一対の昇降ガイド４０を昇降部材４１で前後両側から挟んで、前後位置を規制しながらラム６の昇降を案内する。このとき、直進ガイド機構４８の左右の移動体４７がそれぞれ昇降ガイド４０の左右内側面に沿って転動することにより、ラム６の左右両側部の左右方向の位置ずれを規制する。そのため、ラム６を左右傾斜させた場合でも、ねじ軸１２の進退方向である上下方向にラム６を直進させることができる。移動体４７の軸心Ｏ１と傾斜案内部材３１の円筒状案内面３０の中心Ｏ２との水平距離は短く、かつラム６が左右傾斜していない中立姿勢にあるとき軸心Ｏ１と中心Ｏ２とが同じ高さに設定してあるため、円筒状案内面３０の中心Ｏ２に対し移動体４７の軸心Ｏ１が円運動するとき、移動体４７が昇降ガイド４０から逃げる方向に動き、移動体４７に無理な力がかからない。また、ラム６が傾斜しても、軸心Ｏ１の左右方向の変位は極めて小さい。よって、ラム６が傾斜しても、移動体４７と昇降ガイド４０との相対的位置関係がほとんど変わることがなく、直進性に影響を与えない。なお、ラム６が中立姿勢にあるとき、移動体４７の軸心Ｏ１と円筒状案内面３０の中心Ｏ２とが完全に同じ高さでなくても良く、若干であればずれていても良い。 When the ram 6 is moved up and down by the lift guide mechanism 7, the pair of right and left lift guides 40 are sandwiched from the front and rear sides by the lift members 41 to guide the lift of the ram 6 while regulating the front and rear positions. At this time, the left and right moving bodies 47 of the rectilinear guide mechanism 48 roll along the left and right inner surfaces of the elevating guide 40, thereby restricting the lateral displacement of the left and right sides of the ram 6. Therefore, even when the ram 6 is tilted left and right, the ram 6 can be moved straight in the vertical direction, which is the forward and backward direction of the screw shaft 12. When the horizontal distance between the axis O1 of the moving body 47 and the center O2 of the cylindrical guide surface 30 of the inclined guide member 31 is short, and the ram 6 is in a neutral posture that is not inclined left and right, the axis O1 and the center O2 are Since they are set at the same height, when the axis O1 of the moving body 47 moves circularly with respect to the center O2 of the cylindrical guide surface 30, the moving body 47 moves in the direction of escaping from the lifting guide 40 and moves to the moving body 47. Unreasonable power is not applied. Even if the ram 6 is inclined, the displacement of the axis O1 in the left-right direction is extremely small. Therefore, even if the ram 6 is inclined, the relative positional relationship between the moving body 47 and the lifting guide 40 is hardly changed, and the straight traveling performance is not affected. When the ram 6 is in a neutral posture, the axis O1 of the moving body 47 and the center O2 of the cylindrical guide surface 30 do not have to be completely the same height, and may be slightly shifted.

ボールねじ機構１１の下端部材２０に取付けられた傾斜案内部材３１とラム６とが、円筒状の案内面３０と被案内面３２とで互いに接しているため、ラム６の左右傾斜を変更しても傾斜案内部材３１とラム６とが互いに接触した状態に保たれる。傾斜案内部材３１は取付ボルト３５によって下端部材２０に前後および左右方向に位置変更可能に取付けられているため、ラム６の位置調整をした場合でも、傾斜案内部材３１の左右方向位置を容易に変更することができ、またラム６の前後傾斜を調整した場合にも、傾斜案内部材３１の前後方向位置を容易に変更することができる。なお、ラム６の左右傾斜を変更した場合でも、左右のボールねじ機構１１のねじ軸１２間の距離に比べ傾斜量の比率が小さく、左右の被案内面３２間の距離の変化は極めて小さいため、傾斜案内部材３１の左右方向位置は変更しなくても良い。 Since the inclined guide member 31 and the ram 6 attached to the lower end member 20 of the ball screw mechanism 11 are in contact with each other at the cylindrical guide surface 30 and the guided surface 32, the right and left inclination of the ram 6 is changed. Also, the inclined guide member 31 and the ram 6 are kept in contact with each other. Since the tilt guide member 31 is attached to the lower end member 20 by the mounting bolt 35 so that the position of the tilt guide member 31 can be changed in the front-rear and left-right directions, the position of the tilt guide member 31 can be easily changed even when the position of the ram 6 is adjusted. In addition, even when the longitudinal inclination of the ram 6 is adjusted, the longitudinal position of the inclined guide member 31 can be easily changed. Even when the left and right inclination of the ram 6 is changed, the ratio of the inclination amount is small compared to the distance between the screw shafts 12 of the left and right ball screw mechanisms 11, and the change in the distance between the left and right guided surfaces 32 is extremely small. The horizontal position of the inclined guide member 31 may not be changed.

このプレス機械は、直進ガイド機構４８および回転規制手段３６をラム６側にまとめて設けた構成とした。そのため、これらがラム６側と本体フレーム１側とに分散している場合に比べ、構成を簡略にできる。また、昇降ガイド機構７の昇降ガイド４０を直進ガイド機構４８の一部として利用しているため、直進ガイド機構４８の部品点数を減らすことができる。 This press machine has a configuration in which the linear guide mechanism 48 and the rotation restricting means 36 are collectively provided on the ram 6 side. Therefore, compared with the case where these are distributed on the ram 6 side and the main body frame 1 side, the configuration can be simplified. Further, since the elevating guide 40 of the elevating guide mechanism 7 is used as a part of the rectilinear guide mechanism 48, the number of parts of the rectilinear guide mechanism 48 can be reduced.

上記実施形態の直進ガイド機構４８は、ラム６を上下方向に直進させるために、ラム６の左右両側部の左右方向の位置ずれを規制しているが、ラム６の左右中央部の左右方向の位置ずれを規制するようにしてもよい。例えば図６に示すように、本体フレーム１の左右中央部に上下方向の溝６０を有するガイドレール６１を固定して設け、ラム６に前記溝６０に沿って回転自在なローラ６２を設けた構成とすることができる。 The rectilinear guide mechanism 48 of the above embodiment regulates the lateral displacement of the left and right sides of the ram 6 in order to cause the ram 6 to go straight up and down. You may make it regulate position shift. For example, as shown in FIG. 6, a structure is provided in which a guide rail 61 having a vertical groove 60 is fixedly provided in the left and right central portion of the main body frame 1, and a roller 62 that is rotatable along the groove 60 is provided in the ram 6. It can be.

[参考例]
図７は、本発明の課題を本発明とは別の手法で解決したプレス機械の、昇降駆動機構の進退部品とラムとの連結部を示す。このプレス機械も、本発明の実施形態と同様に、動作変換機構としてボールねじ機構１１を備えた左右一対の昇降駆動機構(図示せず)により、ラム６の左右両側部がそれぞれ個別に昇降駆動する。また、昇降ガイド機構７は、左右それぞれ上昇降ガイド部７Ａと下昇降ガイド部７Ｂ(図示せず)とでなる。図７には、右側の上昇降ガイド部７Ａだけが図示されている。各昇降ガイド部７Ａ，７Ｂは、前記発明の実施形態と同様に、本体フレーム１に固定して設けられた昇降ガイド４０と、ラム６に設けられた前後一対の昇降部材４１とを有する。 [Reference example]
FIG. 7 shows a connecting portion between the advancing / retreating part of the lifting / lowering drive mechanism and the ram of the press machine which has solved the problem of the present invention by a technique different from the present invention. Similarly to the embodiment of the present invention, the right and left side portions of the ram 6 are individually lifted and lowered by a pair of left and right lifting drive mechanisms (not shown) having a ball screw mechanism 11 as an operation conversion mechanism. To do. The lifting guide mechanism 7 includes an upper lifting guide portion 7A and a lower lifting guide portion 7B (not shown). FIG. 7 shows only the upper up / down guide portion 7A on the right side. Each elevating guide portion 7A, 7B has an elevating guide 40 fixed to the main body frame 1 and a pair of front and rear elevating members 41 provided on the ram 6 as in the embodiment of the present invention.

このプレス機械が本発明の実施形態と異なる点は、前記回転規制手段３６および直進ガイド機構４８の両方の機能を持たせた回転規制・直進ガイド機構７０を設けたことである。回転規制・直進ガイド機構７０は、ラム６の背面側で上下方向に延びるリニアガイド７１を本体フレーム１に設置し、このリニアガイド７１の可動部７１ａから前方に延ばした連結用プレート７２の先端部を、ボールねじ機構１１の進退部品であるねじ軸１２の下端部材２０の下側に重ね合わせて、下端部材２０およびラム６に連結してある。 This press machine is different from the embodiment of the present invention in that a rotation restricting / straight guide mechanism 70 having functions of both the rotation restricting means 36 and the straight guide mechanism 48 is provided. The rotation restricting / straight guide mechanism 70 is provided with a linear guide 71 extending in the vertical direction on the back surface side of the ram 6 in the main body frame 1, and a leading end portion of a connecting plate 72 extending forward from a movable portion 71 a of the linear guide 71. Is coupled to the lower end member 20 and the ram 6 so as to overlap with the lower side of the lower end member 20 of the screw shaft 12 which is an advancing / retreating part of the ball screw mechanism 11.

具体的には、本発明の実施形態と同様に、ラム６の円形孔２３に連結ピン２４を前後に貫通して設け、この連結ピン２４の前後一対の貫通孔２５に連結ボルト２６を上向きに挿通する。そして、連結ボルト２６を連結用プレート７２のねじ孔７２ａにねじ込んでいる。下端部材２０は、この下端部材２０のルーズからなる上下貫通孔２０ｂに上側から挿通したねじ７３を、連結用プレート７２のねじ孔７２ｂにねじ込むことで、連結プレート７２に連結する。このため、下端部材２０と連結用プレート７２の相対位置変更を容易にできる。連結用プレート７２の下端には、前記同様に下面がラム６を案内する案内面３０になった傾斜案内部材３１が取付けられ、この傾斜案内部材３１とラム６の被案内面３２とで、ラム６の左右傾斜を調整する傾斜調整手段３３を構成する。このプレス機械の場合、本発明の実施形態における規制部材３７は設けられていない。なお、本発明の実施形態と同様の構成である箇所については、同じ符号を付して表し、説明を省略する。 Specifically, similarly to the embodiment of the present invention, the connecting pin 24 is provided through the circular hole 23 of the ram 6 so as to pass back and forth, and the connecting bolt 26 is directed upward in the pair of front and rear through holes 25 of the connecting pin 24. Insert. The connecting bolt 26 is screwed into the screw hole 72 a of the connecting plate 72. The lower end member 20 is connected to the connection plate 72 by screwing a screw 73 inserted from above into the upper and lower through-holes 20b made of the lower end member 20 into the screw hole 72b of the connection plate 72. For this reason, the relative position change of the lower end member 20 and the connecting plate 72 can be facilitated. An inclined guide member 31 having a lower surface serving as a guide surface 30 for guiding the ram 6 is attached to the lower end of the connecting plate 72. The inclined guide member 31 and the guided surface 32 of the ram 6 6 constitutes an inclination adjusting means 33 for adjusting the right and left inclination. In the case of this press machine, the regulating member 37 in the embodiment of the present invention is not provided. In addition, about the location which is the same structure as embodiment of this invention, it attaches and represents with the same code | symbol, and abbreviate | omits description.

１…本体フレーム
６…ラム
７…昇降ガイド機構
８…昇降駆動機構
１０…昇降用回転駆動源
１１…ボールねじ機構
１２…ねじ軸（進退部品）
１３…ナット（回転部品）
１９…回転阻止・傾斜許容連結機構
３０…案内面
３１…傾斜案内部材
３２…被案内面
３３…傾斜調整手段
３６…回転規制手段
４０…昇降ガイド
４１…昇降部材
４７…移動体
４８…直進ガイド機構 DESCRIPTION OF SYMBOLS 1 ... Main body frame 6 ... Ram 7 ... Elevating guide mechanism 8 ... Elevating drive mechanism 10 ... Rotating drive source 11 for raising / lowering ... Ball screw mechanism 12 ... Screw shaft (advance / retreat parts)
13 ... Nut (Rotating part)
DESCRIPTION OF SYMBOLS 19 ... Rotation | blocking prevention / inclination permissible coupling mechanism 30 ... Guide surface 31 ... Inclination guide member 32 ... Guided surface 33 ... Inclination adjustment means 36 ... Rotation restriction means 40 ... Elevating guide 41 ... Elevating member 47 ... Moving body 48 ... Straight guide mechanism

Claims

A main body frame in which a lower mold extending in the left-right direction is installed, and an upper part extending in the left-right direction facing the lower mold at the lower end, supported by the main body frame so as to be movable up and down via a lifting guide mechanism at both left and right ends. A ram having a mold attached thereto, a pair of right and left rotary drive sources for raising and lowering provided on the main body frame, and the left and right end portions of the ram by converting the rotary operation of the rotary drive sources for raising and lowering into vertical movements A pair of left and right ball screw mechanisms that individually raise and lower, and the elevating guide mechanism is a press machine that allows left and right inclination of the ram,
Among the screw shafts and nuts of each ball screw mechanism, the advancing / retreating part that performs the advancing / retreating operation and the main body frame or the ram are in a state in which relative rotation around the axis of the advancing / retreating part is prevented, and the ram is allowed to tilt horizontally. Provided with a rotation prevention / inclination-permissible coupling mechanism for coupling in the
Between the main body frame and the ram, a linear guide mechanism that restricts movement of the ram in the left-right direction is provided.
Press machine.

The elevating guide mechanism is provided at a pair of left and right elevating guides fixed to the body frame so as to oppose the left and right end portions of the ram, and provided at both left and right end portions of the ram. An elevating member that is restricted in direction and freely elevates with the ram,
The rectilinear guide mechanism includes the pair of left and right lifting guides and a pair of left and right moving bodies that are provided at both left and right ends of the ram, and are respectively moved in the left and right directions by the lifting guides.
The press machine according to claim 1.

The rotation preventing / tilting allowable coupling mechanism is attached to the forward / backward moving part of the ball screw mechanism so that the position can be changed in the front-rear and left-right directions, and the guide surface is a cylindrical surface or a part of a spherical surface whose central axis is along the front-rear direction. An inclined guide member having a guide surface, a guided surface forming portion including a guided surface that is formed on the ram and slidably contacts the guide surface, and a regulating member that restricts rotation of the inclined guide member. Or the press machine of Claim 2.