JP7016158B2

JP7016158B2 - Clamping device

Info

Publication number: JP7016158B2
Application number: JP2018101828A
Authority: JP
Inventors: 典之陶山
Original assignee: フジ・プロダクト株式会社
Priority date: 2017-09-05
Filing date: 2018-05-28
Publication date: 2022-02-04
Anticipated expiration: 2038-03-15
Also published as: JP6457677B1; JP2019042802A; JP2019042801A

Description

本発明は、鋼板の折り曲げ加工機械、所謂プレスブレーキ用の上金型クランプ装置（以下クランプ装置と称する）に関する。 The present invention relates to a steel plate bending machine, a so-called press brake upper die clamping device (hereinafter referred to as a clamping device).

一般に、プレスブレーキ作業において、加工の対象製品は多種少量、且つ様々な製品形状であるため、各製品の加工に適応できる金型形状への変換が頻繁に行われている。特に金型に関しては、金型の断面形状や、必要な金型長さへの対応など、金型の交換作業は、プレスブレーキの生産性に大きく影響を及ぼす要因になっている。加えて、金型は、断面形状、長さによって、軽作業の範囲を超えるほどの重さもあり、金型の取付、取外しを行う上で、操作性、安全性への改善が強く求められてきた。また、全般的に使用されている多くの金型は、金型の前後方向における中心線に対して対象ではなく、従って様々な製品形状に対応するために、所謂「表付け」、「裏付け」が頻繁に行なわれている。 Generally, in press brake work, since the products to be processed are various and small in quantity and have various product shapes, conversion to a mold shape suitable for processing of each product is frequently performed. Especially for dies, the die replacement work, such as the cross-sectional shape of the die and the required mold length, is a factor that greatly affects the productivity of the press brake. In addition, the mold is heavy enough to exceed the range of light work depending on the cross-sectional shape and length, and there is a strong demand for improvements in operability and safety when installing and removing the mold. rice field. In addition, many molds that are generally used are not targeted for the center line in the front-back direction of the mold, and therefore are so-called "fronting" and "backing" in order to correspond to various product shapes. Is frequently done.

クランプ装置には、この「表付け」、「裏付け」を行うことができる機能が求められ、既存のクランプ装置も基本的には、これらの機能を有してきた。
（特許文献１及び２参照） The clamp device is required to have a function capable of performing this "fronting" and "backing", and the existing clamping device basically has these functions.
(See Patent Documents 1 and 2)

さらに、鋼板曲げ加工中において、クランプ装置と製品との干渉を可能な限り低減するため、干渉しているクランプ装置の構成部品の一部である前面側の締板体あるいは後面側の締板体を取外し、あるいは機械本体に対するクランプ装置の位置の変更など、加工対象製品の拡大を図ることも併せて強く求められてきた。 Further, in order to reduce the interference between the clamping device and the product as much as possible during the bending process of the steel plate, the front side clamp or the rear side clamp which is a part of the components of the interfering clamp device. There has also been a strong demand for expanding the products to be machined, such as removing them or changing the position of the clamp device with respect to the machine body.

特開平８－５７５４２Japanese Patent Application Laid-Open No. 8-57542 特許第４７５０９５３Patent No. 4759953

しかしながら従来技術における多くの場合は、上記特許文献１および２において例示されているように、上金型Xａ、Ｘｂを直接的に固定あるいは取外しに係るクランプ装置を構成する前面側締板体あるいは後面側締板体をクランプ装置の固定支持体に装着する機構として、固定支持体の上下方向中央部近傍に、凸状の球面座を有するネジ部材を螺設し、他方前面側締板体あるいは後面側締板体には凹状の球面座を設けることにより、これらの球面座を相互にかみ合わせることにより、前面側および後面側締板体がそれぞれ揺動可能な態様で支持され、加えて前面側締板体、あるいは後面側締板体の揺動を助成するための機構部品もそれぞれの締板体と固定支持体の間に設けられているので、既述ように加工対象製品とクランプ装置の金型固定に使用されてない締板体が干渉する場合において、干渉を取り除くために締板体を取外すには、上述の螺設されているネジ部材等を、工具を用いて取外す必要があり、仮に取り外した場合には、締板体および球面座を有する複数のネジ部材等の部品に分離されることになり、これらの部品の管理作業を伴うなど、非常に煩雑な作業を必要とするため、前面側締板体あるいは後面側締板体の取外しを行うことは、実用上課題を有していた。またプレスブレーキ本体の特性上、後面側締板体の操作は、作業者から目視できないクランプ装置の裏面となっているため、前面側締板体の作業に比較し、煩雑になっている等の課題も有していた。 However, in many cases in the prior art, as exemplified in the above Patent Documents 1 and 2, the front side clamp body or the rear surface constituting the clamping device for directly fixing or removing the upper molds Xa and Xb. As a mechanism for mounting the side clamp body to the fixed support of the clamping device, a screw member having a convex spherical seat is screwed in the vicinity of the central portion in the vertical direction of the fixed support, while the front side clamp body or the rear surface thereof. By providing a concave spherical seat on the side clamp body, the front side and rear side clamps are supported in a swingable manner by engaging these spherical seats with each other, and in addition, the front side. Mechanical parts for assisting the swing of the tightening plate body or the rear side tightening plate body are also provided between each tightening plate body and the fixed support, so as described above, the product to be machined and the clamping device When the tightening plate body that is not used for fixing the mold interferes, it is necessary to remove the above-mentioned screwed screw member or the like using a tool in order to remove the tightening plate body in order to remove the interference. If it is removed, it will be separated into parts such as a tightening plate and a plurality of screw members having a spherical seat, which requires very complicated work such as management work of these parts. Therefore, removing the front side clamp body or the rear side clamp body has a practical problem. In addition, due to the characteristics of the press brake body, the operation of the rear side clamp is complicated compared to the operation of the front side clamp because it is on the back side of the clamp device that cannot be seen by the operator. I also had a problem.

本発明に係るクランプ装置は、上記従来技術の課題に鑑み、創案されたものであって、
金型（Ｘａ、Ｘｂ）を固定支持するための固定支持体（１）と、
該固定支持体（１）の断面両側で、夫々の回動支点（２０ａ、２０ｂ）を中心に回動し、金型（Ｘａ、Ｘｂ）の係合部に係合することで前面側及び後面側のそれぞれの金型（Ｘａ、Ｘｂ）をクランプ可能な前面側及び後面側各締板体（２ａ、２ｂ）と、
上記前面側及び後面側各締板体（２ａ、２ｂ）の回動支点（２０ａ、２０ｂ）よりクランプ部側に設けられた各弾性体（３ａ、３ｂ）と、
支え板（１０２）の溝部に設けられた一方向に進退する進退体（４）および該進退体（４）の進退を直交方向の移動に変換する変換器（５）を設け、且つ該進退体（４）の移動量を適宜調整できつつ、その移動量と弾性体（３ａ、３ｂ）の反発力によって、前面側締板体（２ａ）および後面側締板体（２ｂ）を時計方向若しくは反時計方向に回動され、前面側締板体（２ａ）および後面側締板体（２ｂ）によって金型（Ｘａ、Ｘｂ）を金型固定、若しくは金型取外しを行うことが可能なクランプ装置において、
固定支持体（１）の前面側および後面側の双方に、底部に段差を有する矩形状の溝（１１ａ、１１ｂ）を設け、一方前面側締板体（２ａ）及び後面側締板体（２ｂ）の双方には、下面に段差を有するサドル（２１ａ、２１ｂ）を一体的に設け、且つこれらの段差部を相互にかみ合わせることにより、該かみ合い部をもって前面側締板体（２ａ）および後面側締板体（２ｂ）の回動支点（２０ａ、２０ｂ）を構成すると共に、これらの構成に加えて、自身を適宜回動することにより、上記のかみ合いの離脱を規制して、上記段差部によるかみ合いを外すことを可能とし、該かみ合いを外すことによって固定支持体（１）から前面側締板体（２ａ）もしくは後面側締板体（２ｂ）を取外し、あるいは再度かみ合わせを行った後、自身を適宜回動することにより前面側締板体（２ａ）もしくは後面側締板体（２ｂ）の回動支点（２０ａ、２０ｂ）を再構成することを可能とする脱着ピン（２４ａ、２４ｂ）を設けたことを基本的特徴としている。 The clamp device according to the present invention was devised in view of the above-mentioned problems of the prior art.
A fixed support (1) for fixedly supporting the mold (Xa, Xb) and
The front side and the rear surface are rotated around the respective rotation fulcrums (20a, 20b) on both sides of the cross section of the fixed support (1) and engaged with the engaging portions of the molds (Xa, Xb). Front side and rear side tightening plate bodies (2a, 2b) capable of clamping the respective molds (Xa, Xb) on the side, and
Each elastic body (3a, 3b) provided on the clamp portion side from the rotation fulcrum (20a, 20b) of each of the front side and rear side tightening plate bodies (2a, 2b).
An advancing / retreating body (4) provided in the groove of the support plate (102) and a converter (5) for converting the advancing / retreating of the advancing / retreating body (4) into movement in the orthogonal direction are provided, and the advancing / retreating body is provided. While the movement amount of (4) can be adjusted as appropriate, the front side clamp body (2a) and the rear side clamp body (2b) are rotated clockwise or counterclockwise by the movement amount and the repulsive force of the elastic body (3a, 3b). In a clamping device that is rotated clockwise and can fix the mold (Xa, Xb) to the mold (Xa, Xb) by the front side tightening plate body (2a) and the rear side tightening plate body (2b), or can remove the mold. ,
Rectangular grooves (11a, 11b) having a step at the bottom are provided on both the front side and the rear surface side of the fixed support (1), while the front side clamping plate body (2a) and the rear surface side clamping plate body (2b) are provided. ), Saddles (21a, 21b) having a step on the lower surface are integrally provided, and these stepped portions are meshed with each other, so that the meshing portion is used as the front side clamping plate body (2a) and the rear surface. The rotation fulcrum (20a, 20b) of the side clamp body (2b) is configured, and in addition to these configurations, the self-rotating body is appropriately rotated to regulate the disengagement of the above-mentioned meshing, and the above-mentioned step portion. By disengaging the engagement, the front side clamp body (2a) or the rear side clamp body (2b) is removed from the fixed support (1), or the engagement is performed again, and then the engagement is performed. Detachable pins (24a, 24b) that make it possible to reconstruct the rotation fulcrum (20a, 20b) of the front side clamp body (2a) or the rear side clamp body (2b) by rotating itself as appropriate. It is a basic feature that it is provided.

本発明のクランプ装置においては、加工対象製品と金型のクランプに供されていない側の締板体とが干渉し、加工できない事態が予測される場合、干渉する締板体を、煩わしい工具類を用いることなく短時間で取外すことによって、対象製品の加工を行い、次いで加工後、該締板体を元の取付け状態へ短時間で復元することによって、再び金型のクランプに供する運用方法、即ち加工対象製品との干渉が予測される前面側あるいは後面側締板体（２ａ、２ｂ）を固定支持体（１）から取外す場合において、固定支持体（１）に設けられた底部に段差を有する矩形状の溝（１１ａ、１１ｂ）と前面側あるいは後面側締板体（２ａ、２ｂ）に一体的に設けられている下面に段差を有するサドル（２１ａ、２１ｂ）とがそれぞれの段差部で相互にかみ合い、前面側あるいは後面側締板体（２ａ、２ｂ）の回動支点（２０ａ、２０ｂ）を構成している状態において、該かみ合いの離脱を規制する脱着ピン（２４ａ、２４ｂ）を適宜回動することにより、上記段差部におけるかみ合いを外すことが可能となり、従って前面側あるいは後面側締板体（２ａ、２ｂ）は、固定支持体（１）から取外すことができるようになるし、他方、前面側あるいは後面側締板体（２ａ、２ｂ）を固定支持体（１）へ装着する場合において、前面側あるいは後面側締板体（２ａ、２ｂ）に一体的に設けられているサドル（２１ａ、２１ｂ）を固定支持体（１）の溝（１１ａ、１１ｂ）に挿入し、上記段差部においてかみ合いを構成した後、脱着ピン（２４ａ、２４ｂ）を適宜回動することによって前面側あるいは後面側締板体（２ａ、２ｂ）の回動支点（２０ａ、２０ｂ）が復元される結果、前面側あるいは後面側締板体（２ａ、２ｂ）が再び金型のクランプに供される状態に戻る、これら一連の運用方法や、あるいは後述する実施例に僅かな変更を加えることにより、予め前面側締板体（２４ａ）のみを設けておき、後面側締板体で金型をクランプする必要が生じた場合には、前面側締板体（２４ａ）を固定支持体（１）の前面側から取外し、固定支持体（１）の後面側へ付け替えて使用する運用方法など、加工対象製品の特性に応じた運用方法により、加工対象製品の拡大が図られ、曲げ加工順序における柔軟性を増すなど、生産性の向上に優れた効果を奏し得る。 In the clamping device of the present invention, when it is predicted that the product to be machined and the tightening plate body on the side not used for clamping the mold interfere with each other and cannot be machined, the interfering tightening plate body is troublesome tools. An operation method in which the target product is processed by removing it in a short time without using, and then the tightening plate body is restored to the original mounting state in a short time after processing, so that the target product can be used for the clamp of the mold again. That is, when the front side or rear side tightening plate body (2a, 2b), which is expected to interfere with the product to be processed, is removed from the fixed support (1), a step is provided on the bottom portion of the fixed support (1). The rectangular groove (11a, 11b) having a step and the saddle (21a, 21b) having a step on the lower surface integrally provided on the front side or the rear side tightening plate body (2a, 2b) are at each step portion. Detachable pins (24a, 24b) that regulate the disengagement of the meshing are appropriately provided in a state where they are meshed with each other and form the rotation fulcrum (20a, 20b) of the front side or rear surface side clamping plate body (2a, 2b). By rotating, it becomes possible to disengage the meshing at the stepped portion, and therefore the front side or rear side tightening plate body (2a, 2b) can be removed from the fixed support (1). On the other hand, when the front side or rear side clamp body (2a, 2b) is attached to the fixed support (1), the saddle integrally provided on the front side or rear surface side clamp body (2a, 2b). (21a, 21b) is inserted into the groove (11a, 11b) of the fixed support (1), the engagement is formed at the step portion, and then the detachable pin (24a, 24b) is appropriately rotated to the front side or by rotating the attachment / detachment pin (24a, 24b). As a result of restoring the rotation fulcrum (20a, 20b) of the rear side clamping plate body (2a, 2b), the front side or the rear surface side clamping plate body (2a, 2b) is put into the state of being used for the clamp of the mold again. Return, it is necessary to provide only the front side clamping plate (24a) in advance and clamp the mold with the rear side clamping plate by making a slight change to these series of operation methods or the examples described later. If this occurs, the front side clamp body (24a) is removed from the front side of the fixed support (1) and replaced with the rear side of the fixed support (1). Depending on the operation method according to the characteristics, the products to be machined can be expanded, and the flexibility in the bending order can be increased, which can have an excellent effect on improving the productivity.

本発明の一実施例に係るプレスブレーキ用の上金型クランプ装置の正面図である。It is a front view of the upper die clamp device for a press brake which concerns on one Embodiment of this invention. 本実施例の構成において、前面側の締板体２ａにより前側金型Ｘａをクランプした状態を示す図１のＡ－Ａ線断面図である。FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1 showing a state in which the front mold Xa is clamped by the front clamp plate body 2a in the configuration of this embodiment. 本実施例の構成において、前面側締板体２ａにより前側金型Ｘａをクランプする状態を、また後面側締板体２ｂは、締板体２ｂを取り外す過度的状態を示す図１のＢ－Ｂ線断面図である。In the configuration of this embodiment, the front side clamping plate body 2a clamps the front side mold Xa, and the rear surface side clamping plate body 2b shows an excessive state in which the tightening plate body 2b is removed. It is a line sectional view. 本実施例の構成において、前面側締板体２ａ、後面側締板体２ｂの中間開位置の状態を示す図１のＡ－Ａ線断面図である。In the configuration of this embodiment, it is a sectional view taken along the line AA of FIG. 1 which shows the state of the intermediate open position of the front side clamp body 2a and the rear surface side clamp body 2b. 本実施例の構成において、前面側締板体２ａを開放させ、金型Ｘａを開放した状態を示す図１のＡ－Ａ線断面図である。FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1 showing a state in which the front side clamp body 2a is opened and the mold Xa is opened in the configuration of this embodiment. 本考実施例の構成において、クランプ装置から前面側締板体２ａを取外した状態を示す立体図である。It is a three-dimensional view which shows the state which the front side clamp body 2a was removed from the clamp device in the structure of this Embodiment.

以下、本発明の実施の形態を図示例と共に説明する。 Hereinafter, embodiments of the present invention will be described with reference to the illustrated examples.

図１は、本発明の実施例に係るプレスブレーキ用の上金型クランプ装置の正面図である。また図２、図４、図５は、図１のＡ－Ａ線断面図である。 FIG. 1 is a front view of an upper die clamp device for a press brake according to an embodiment of the present invention. 2, FIG. 4, and FIG. 5 are cross-sectional views taken along the line AA of FIG.

本実施例のクランプ装置は、図１及び図２に示す支え板１０２の上端部において、図２に示す機械本体１００の側面に対して、変換基台６５を介して、締付けボルト１０１により、押圧、固定されている。図１のうち、中心部近傍が山形に上方に突出している部分が、前面側締板体２ａであり、この部分により、前面側の金型Ｘａを固定支持体１に押圧、解除することにより金型Ｘａ、の取付け、取外しがなされる。前面側締板体２ａの山形上方突出部形状に合わせてその中心部近傍が凹状の部分を有する支え板１０２の上側部分において機械本体１００に固定されている。 The clamp device of this embodiment presses the upper end portion of the support plate 102 shown in FIGS. 1 and 2 against the side surface of the machine body 100 shown in FIG. 2 by a tightening bolt 101 via a conversion base 65. , Is fixed. In FIG. 1, the portion where the vicinity of the central portion protrudes upward in a chevron shape is the front side clamping plate body 2a, and the front side mold Xa is pressed against and released from the fixed support 1 by this portion. The mold Xa is attached and detached. It is fixed to the machine body 100 at the upper portion of the support plate 102 having a concave portion in the vicinity of the central portion thereof in accordance with the shape of the chevron upward protrusion of the front side clamping plate body 2a.

これらの図面に示すように、本実施例は、金型Ｘａ、Ｘｂを固定支持するための固定支持体１と、該固定支持体１の断面両側で、夫々の回動支点２０ａ、２０ｂを中心に回動し、金型Ｘａ、Ｘｂの係合部に係合することによって前面側及び後面側のそれぞれの金型Ｘａ、Ｘｂをクランプする前面側及び後面側締板体２ａ、２ｂと、該前面側締板体及び後面側締板体２ａ、２ｂの回動支点２０ａ、２０ｂより下方の金型Ｘａ、Ｘｂをクランプする側に設けられた各弾性体３ａ、３ｂと、前面側締板体および後面側締板体２ａ、２ｂの回動に作用する一連の機構の一部を構成するところの一方向に進退する進退体４と、該進退体４の下方側先端部において両側から接触し、該進退体４の進退方向に直交する方向であって、該進退体４の先端と接触する両側の夫々が反対方向に移動するよう、該進退体４の進退をその直交方向の移動に変換し、且つその直交方向の移動量が該進退体４の進退量に応じて適宜調整され、各締板体２ａ、２ｂの回動支点２０ａ、２０ｂを基点に金型Ｘａ、Ｘｂの係合部と上下方向反対側に、変換された移動方向の各先端部が直接乃至間接的に接触する変換器５と、上記進退体４を上下方向に進退せしめる進退機構６などにより構成されている。尚、前述の進退体４は、上記図１の支え板１０２の左右方向中央部に設けられた溝部と固定支持体１との間に、上下方向に移動可能な態様で設けられている。 As shown in these drawings, in this embodiment, the fixed support 1 for fixedly supporting the molds Xa and Xb and the rotation fulcrum 20a and 20b on both sides of the cross section of the fixed support 1 are centered. The front side and rear surface side clamping plate bodies 2a and 2b for clamping the front side and rear surface side molds Xa and Xb by engaging with the engaging portions of the molds Xa and Xb, respectively. The elastic bodies 3a and 3b provided on the side for clamping the molds Xa and Xb below the rotation fulcrum 20a and 20b of the front side clamping plate body and the rear surface side tightening plate body 2a and 2b, and the front side tightening plate body. And the advancing / retreating body 4 that advances and retreats in one direction, which constitutes a part of a series of mechanisms acting on the rotation of the rear side clamping plate bodies 2a and 2b, and the advancing / retreating body 4 come into contact with each other from both sides at the lower tip portion of the advancing / retreating body 4. , The advance / retreat of the advancing / retreating body 4 is converted into the movement in the orthogonal direction so that the advancing / retreating bodies 4 move in opposite directions on both sides in contact with the tip of the advancing / retreating body 4. The amount of movement in the orthogonal direction thereof is appropriately adjusted according to the amount of advance / retreat of the advancing / retreating body 4, and the engaging portions of the molds Xa and Xb are based on the rotation fulcrum 20a and 20b of the tightening plate bodies 2a and 2b. On the opposite side of the vertical direction, the converter 5 is in direct or indirect contact with each of the converted tip portions in the moving direction, and the advancing / retreating mechanism 6 for advancing / retreating the advancing / retreating body 4 in the vertical direction is configured. The advancing / retreating body 4 is provided so as to be movable in the vertical direction between the groove portion provided in the central portion in the left-right direction of the support plate 102 in FIG. 1 and the fixed support body 1.

上記の進退体４の動作をより詳述すれば、進退体４の下方側先端部が変換器５の間隙（図２中５で囲んだ間隙になった部分）に出入可能な状態で尖通されており、該変換器５は、図２、図４、図５に示すように、上端に回動中心５０ａ及び５０ｂを有するカム板５１ａ、５１ｂで構成されると共に、該進退体４が下方に押し込まれるのに伴い、該進退体４の下方側先端部に設けられている斜面部とＰａ、Ｐｂにおいて接している回動中心５０ａ、５０ｂを有するカム板５１ａ、５１ｂは、その夫々が回動中心５０ａ、５０ｂを回動中心として左右それぞれ反対方向に回動し、該カム板５１ａ、５１ｂの移動方向の各先端部において直接乃至間接的に各締板体２ａ、２ｂを回動支点２０ａ、２０ｂを中心に回動させ、前面側締板体および後面側締板体２ａ、２ｂの金型Ｘａ、Ｘｂとの係合部において前面側および後面側のそれぞれの金型Ｘａ、Ｘｂを固定支持体１に押圧、固定する方向へ移動する。 More specifically, the operation of the advancing / retreating body 4 will be described in more detail. As shown in FIGS. 2, 4, and 5, the converter 5 is composed of cam plates 51a and 51b having rotation centers 50a and 50b at the upper ends, and the advancing / retreating body 4 is downward. The cam plates 51a and 51b having rotation centers 50a and 50b that are in contact with the slope portion provided at the lower tip portion of the advancing and retreating body 4 at Pa and Pb are rotated. Rotating in opposite directions to the left and right with the moving centers 50a and 50b as the rotation centers, the rotating fulcrum 20a directly or indirectly at each tip of the cam plates 51a and 51b in the moving direction. , 20b is rotated around, and the front side and rear side molds Xa and Xb are fixed at the engaging portions of the front side tightening plate body and the rear side tightening plate bodies 2a and 2b with the molds Xa and Xb. It presses against the support 1 and moves in the direction of fixing.

上述の進退体４の動作とは逆方向、即ち進退体４を上方へ移動させることによって、変換器５における進退体４に接しているカム板のＰａ、Ｐｂ間を狭まる方向に弾性体３ａ、３ｂの弾発力が作用し、従って図４及び図５に示すように、前面側締板体および後面側締板体２ａ、２ｂは、回動支点２０ａ、２０ｂを中心に金型Ｘａ、Ｘｂを開放する方向に回動し、その下方部を開くことになる。 The elastic body 3a, in the direction opposite to the operation of the advancing / retreating body 4 described above, that is, in the direction of narrowing between Pa and Pb of the cam plate in contact with the advancing / retreating body 4 in the converter 5 by moving the advancing / retreating body 4 upward. The elastic force of 3b acts, and therefore, as shown in FIGS. 4 and 5, the front side clamping plate body and the rear surface side clamping plate body 2a and 2b have the molds Xa and Xb centered on the rotation fulcrums 20a and 20b. Will rotate in the direction of opening, and the lower part thereof will be opened.

ここで、本実施例の進退体４は、特にその構成が上記のように限定されるわけではないが、それを上下方向に進退させる進退機構６がクランプ装置の上方に設けられており、該進退機構６により進退体４の進退が行われる機構を有している。 Here, the structure of the advancing / retreating body 4 of the present embodiment is not particularly limited as described above, but an advancing / retreating mechanism 6 for advancing / retreating it in the vertical direction is provided above the clamp device. It has a mechanism for advancing and retreating the advancing / retreating body 4 by the advancing / retreating mechanism 6.

以上説明を要約すれば、上記進退機構６で、進退体４が下方に押し込まれた時は、Ｐａ、Ｐｂ間が広がるように上記変換器５による移動の変換がなされて、図２に示すように、上記各弾性体３ａ、３ｂの弾性力に抗して各締板体２ａ、２ｂの係合部により金型Ｘａ、Ｘｂがクランプされることになり、反対に上記進退機構６により、進退体４が後退した時は、Ｐａ、Ｐｂ間が狭まるように上記変換器５によってその移動が変換されて、図４、図５に示すように、上記各弾性体３ａ、３ｂの弾性力により各締板体２ａ、２ｂは、夫々の回動支点２０ａ、２０ｂを中心に回動し、各締板体２ａ、２ｂの係合部における金型Ｘａ、Ｘｂのクランプが開放されるようになる。 To summarize the above description, when the advancing / retreating body 4 is pushed downward by the advancing / retreating mechanism 6, the movement is converted by the converter 5 so that the space between Pa and Pb is widened, as shown in FIG. In addition, the molds Xa and Xb are clamped by the engaging portions of the tightening plates 2a and 2b against the elastic force of the elastic bodies 3a and 3b, and conversely, the advancement and retreat mechanism 6 causes the advancement and retreat. When the body 4 is retracted, its movement is converted by the converter 5 so that the space between Pa and Pb is narrowed, and as shown in FIGS. 4 and 5, the elastic forces of the elastic bodies 3a and 3b respectively. The tightening plates 2a and 2b rotate around the respective rotation fulcrum points 20a and 20b, and the clamps of the molds Xa and Xb at the engaging portions of the respective tightening plates 2a and 2b are released.

そのため、進退体４と言う一つの構成を進退させるだけで、各締板体２ａ、２ｂの係合部で金型Ｘａ、Ｘｂを固定、解除を行うことができ、進退体４の移動を途中でとめる機能、即ち支え板１０２に設けられた中間停止ピン３２（図２、４及び５を参照）を進退体４に設けられた中間停止溝３１に挿入、離脱をさせることにより、該金型Ｘａ、Ｘｂの固定・中間位置及び全開位置を簡単に設定できる機能を有している。 Therefore, the molds Xa and Xb can be fixed and disengaged at the engaging portions of the clamp plates 2a and 2b by simply advancing and retreating one configuration called the advancing / retreating body 4, and the advancing / retreating body 4 can be moved in the middle. The mold is formed by inserting and detaching the intermediate stop pin 32 (see FIGS. 2, 4 and 5) provided in the support plate 102 into the intermediate stop groove 31 provided in the advancing / retreating body 4. It has a function to easily set the fixed / intermediate position and the fully open position of Xa and Xb.

さらに、前面側締板体及び後面側締板体２ａ、２ｂの金型との係合面には、保持金具２２ａ、２２ｂが保持ボルト２３ａ、２３ｂと同列上に設けられている弾性体によって、各締板体から離れる方向への弾発力をうけながら、保持ボルト２３ａ、２３ｂによって突設されている。該保持金具２２ａ、２２ｂは、金型Ｘａ、Ｘｂの着脱に際し、クランプ装置から金型の不意な脱落を防止し、あるいは重い金型、長い金型の着脱において、各締板体を中間開位置に設定することにより、保持金具２２ａ、２２ｂと金型Ｘａ、Ｘｂに設けられた溝部２０１との係合が完全に外れていない状態、即ち図４に示す状態において、金型を水平方向へ移動させ、クランプ装置への挿入、引出しによる方法によって、金型の着脱をより安全に供する目的で設けられている。 Further, on the engaging surfaces of the front side clamping plate body and the rear surface side clamping plate bodies 2a and 2b with the mold, the holding metal fittings 22a and 22b are provided by an elastic body provided in the same row as the holding bolts 23a and 23b. It is projected by the holding bolts 23a and 23b while receiving an elastic force in a direction away from each tightening plate body. The holding metal fittings 22a and 22b prevent the mold from unexpectedly falling off from the clamping device when the molds Xa and Xb are attached and detached, or when the heavy mold and the long mold are attached and detached, each tightening plate body is placed in an intermediate open position. By setting to, the mold is moved in the horizontal direction in a state where the holding metal fittings 22a and 22b and the groove portions 201 provided in the molds Xa and Xb are not completely disengaged, that is, in the state shown in FIG. It is provided for the purpose of making it safer to attach and detach the mold by inserting it into the clamping device and pulling it out.

次に、本発明の主要部を構成する前面側締板体および後面側締板体２ａ、２ｂについて詳述する。 Next, the front side clamping plate body and the rear surface side clamping plate body 2a and 2b constituting the main part of the present invention will be described in detail.

図２、図４、図５に示されるように、前面側締板体および後面側締板体２ａ、２ｂは、断面上部側が上に行くに従って固定支持体１の側面より離れるように広がった斜面部が設けられている。また、該締板体２ａ、２ｂの上下方向中間近傍には、下面に凸状の段差を有したほぼ矩形に近いサドル２１ａ、２１ｂが図１における水平方向にそれぞれ各締板体２ａ、２ｂの全幅より少し短い長さで一体的に、該締板体２ａ、２ｂの側面から固定支持体１に相対する側に突出して設けられており、一方図２において示されている固定支持体１の両側面には上下方向おける同位置に、サドル２１ａ、２１ｂとかみ合うように、図１における水平方向に固定支持体１の全幅にわたって、底部に凹状の段差を有する溝１１ａ、１１ｂが設けられており、該固定支持体１に設けられた溝１１ａ、１１ｂの開口部寸法は、各締板体２ａ、２ｂと一体的に構成されている前記サドル２１ａ、２１ｂの高さ寸法より僅かに広く、溝１１ａ、１１ｂにサドル２１ａ、２１ｂを一定量挿入可能な態様を成している。 As shown in FIGS. 2, 4, and 5, the front side clamping plate body and the rear surface side clamping plate bodies 2a and 2b are slopes that widen away from the side surface of the fixed support 1 as the upper side of the cross section goes up. A part is provided. Further, in the vicinity of the middle of the tightening plates 2a and 2b in the vertical direction, saddles 21a and 21b having a convex step on the lower surface and which are almost rectangular are formed in the horizontal direction of the tightening plates 2a and 2b in FIG. 1, respectively. The fixed support 1 is provided integrally with a length slightly shorter than the total width so as to project from the side surface of the tightening plate bodies 2a and 2b toward the side facing the fixed support 1, while the fixed support 1 shown in FIG. Grooves 11a and 11b having a concave step at the bottom are provided on both side surfaces at the same position in the vertical direction so as to mesh with the saddles 21a and 21b over the entire width of the fixed support 1 in the horizontal direction in FIG. The opening dimensions of the grooves 11a and 11b provided in the fixed support 1 are slightly wider than the height dimensions of the saddles 21a and 21b integrally configured with the tightening plate bodies 2a and 2b, and the grooves are formed. A certain amount of saddles 21a and 21b can be inserted into 11a and 11b.

以上の構成により、前面側締板体および後面側締板体２ａ、２ｂとそれぞれ一体的に構成されているサドル２１ａ、２１ｂを固定支持体１の溝１１ａ、１１ｂ内に挿入し、溝１１ａ、１１ｂの底部に設けられた凸状の段差をサドル２１ａ、２１ｂの下面に設けられている凸状の突起部が超えたところで該突起部の先端が溝１１ａ、１１ｂの底部に当接するように設置することにより、前面側締板体および後面側締板体２ａ、２ｂは、固定支持体１の溝１１ａ、１１ｂの底部に設けられた段差部とサドル２１ａ、２１ｂの突起部とがかみ合う状態になり、このかみ合い部が金型固定、あるいは開放動作の際の各締板体２ａ、２ｂの回動中心２０ａ、２０ｂを構成していることを特長としている。 With the above configuration, the saddles 21a and 21b integrally configured with the front side clamping plate body and the rear surface side clamping plate bodies 2a and 2b are inserted into the grooves 11a and 11b of the fixed support 1, respectively, and the grooves 11a, When the convex step provided on the bottom of 11b is exceeded by the convex protrusion provided on the lower surfaces of the saddles 21a and 21b, the tip of the protrusion is installed so as to abut on the bottom of the grooves 11a and 11b. By doing so, the front side clamping plate body and the rear surface side clamping plate body 2a and 2b are in a state where the stepped portion provided at the bottom of the grooves 11a and 11b of the fixed support 1 and the protruding portion of the saddle 21a and 21b are engaged with each other. Therefore, the meshing portion is characterized in that it constitutes the rotation centers 20a and 20b of the tightening plates 2a and 2b during the mold fixing or opening operation.

次いで、図１における前面側締板体および後面側締板体２ａ、２ｂの左右方向両端近傍には回動自在に、一部が切欠かれている鍔状の形状を有する脱着ピン２４ａ、２４ｂが図３に示すように固定支持体１の両側面に設けられた底部に凹状の段差を有する溝１１ａ、１１ｂ内に突出する態様で設けられており、該脱着ピン２４ａ、２４ｂの回動における姿勢において、図３に示す前面側締板体２ａ側で例示されているように、脱着ピン２４ａの鍔状の一部が欠落している部分が溝１１ａ、１１ｂの下面側に向いた状態では、鍔状の外周部の上部側が溝１１ａ、１１ｂの上面に当接するように構成されており、従って脱着ピン２４ａは上昇できない状態、即ち前面側締板体２ａの上昇が規制され、前記回動中心２０ａ、２０ｂを構成しているかみ合い部を保持するように機能している。 Next, detachable pins 24a and 24b having a brim-like shape with a part notched rotatably near both ends in the left-right direction of the front side clamping plate body and the rear surface side clamping plate body 2a and 2b in FIG. 1 are provided. As shown in FIG. 3, the fixed support 1 is provided so as to project into the grooves 11a and 11b having concave steps at the bottom provided on both side surfaces, and the posture in rotation of the detachable pins 24a and 24b. In the state where the portion of the detachable pin 24a where the collar-shaped part is missing faces toward the lower surface side of the grooves 11a and 11b, as illustrated on the front side clamping plate body 2a side shown in FIG. The upper side of the flange-shaped outer peripheral portion is configured to abut on the upper surfaces of the grooves 11a and 11b, so that the detachable pin 24a cannot be raised, that is, the rising of the front side clamp body 2a is restricted, and the rotation center. It functions to hold the meshing portions constituting 20a and 20b.

同じく図３の後面側締板体２ｂ側における例示においては、前記の状態に対し、脱着ピン２４ｂが１８０度回動された状態を示し、鍔状の一部が欠落している部分が溝１１ａ、１１ｂの上面側に向いた状態となり、脱着ピン２４ｂの上面と溝１１ｂの上面との間に一定量の隙間を生ずることにより、脱着ピン２４ｂ、即ち後面側締板体２ｂを上記のかみ合いを外せる位置まで引き上げ、次いで後面側締板体２ｂを固定支持体１から水平方向へ離す方向へ移動させることによって、固定支持体１から後面側締板体２ｂとの係合を簡単に離脱させることが可能な構成を有している。 Similarly, in the example on the rear surface side clamping plate body 2b side of FIG. 3, the detachable pin 24b is rotated 180 degrees with respect to the above state, and the portion where the flange-shaped part is missing is the groove 11a. , 11b faces the upper surface side, and a certain amount of gap is created between the upper surface of the detachable pin 24b and the upper surface of the groove 11b, so that the detachable pin 24b, that is, the rear surface side clamping plate body 2b is engaged with the above. By pulling up to a position where it can be removed and then moving the rear surface side clamp body 2b in a direction that horizontally separates it from the fixed support 1, the engagement with the rear surface side clamp body 2b can be easily disengaged from the fixed support 1. Has a possible configuration.

また再度装着する場合においても、離脱の場合と逆な手順を作業することによって可能であることを示している。尚、各締板体２ａ、２ｂの再組付けに際し、左右方向の位置の再現性を図るため、各締板体２ａ、２ｂの左右方向中央部に固定支持体１側に突出して設けられたセンターピン１３ａ、１３ｂと一方固定支持体１側に設けられたセンター溝１２ａ、１２とが相互に嵌め合わされることにより、各締板体２ａ、２ｂは高い再現性でもって固定支持体１へ装着することが可能としている。 It also shows that it is possible to reattach it by performing the reverse procedure of the detachment. When reassembling each of the tightening plates 2a and 2b, in order to reproduce the position in the left-right direction, the tightening plates 2a and 2b are provided at the center of each of the tightening plates 2a and 2b in the left-right direction so as to project toward the fixed support 1. The center pins 13a and 13b and the center grooves 12a and 12 provided on the fixed support 1 side are fitted to each other so that the tightening plates 2a and 2b can be attached to the fixed support 1 with high reproducibility. It is possible to do.

本実施例のクランプ装置によれば、金型の固定、取外しに係る前面側および後面側締板体２ａ、２ｂの双方に対する操作、即ち固定、中間位置、開位置を設定する関連機能を締板体から別機構部に集約したことにより、締板体本体の機能の簡素化および各締板体をクランプ装置の固定支持体１に装着する機構の単純化が図られ、加工対象製品と金型のクランプに供されていない側の締板体とが干渉し、加工できない事態が予測される場合、干渉する締板体を、工具などを用いることなく短時間で取外すことによって、対象製品の加工を行い、加工後、簡単な作業により取外した締板体を復元する例、即ち加工対象製品との干渉が予測される前面側あるいは後面側締板体２ａ、２ｂを固定支持体１から取外す場合において、固定支持体１に設けられた底部に段差を有する矩形状の溝１１ａ、１１ｂと前面側あるいは後面側締板体２ａ、２ｂに一体的に設けられている下面に段差を有するサドル２１ａ、２１ｂとがそれぞれの段差部で相互にかみ合い、前面側あるいは後面側締板体２ａ、２ｂの回動支点２０ａ、２０ｂを構成している状態において、該かみ合いの離脱を規制する脱着ピン２４ａ、２４ｂを適宜回動することにより、上記段差部におけるかみ合いを外すことが可能となり、従って前面側あるいは後面側締板体２ａ、２ｂは、固定支持体１から取外すことができるようになるし、他方、前面側あるいは後面側締板体２ａ、２ｂを固定支持体１へ装着する場合において、前面側あるいは後面側締板体２ａ、２ｂに一体的に設けられているサドル２１ａ、２１ｂを固定支持体１の溝１１ａ、１１ｂに挿入し、上記段差部においてかみ合いを構成した後、脱着ピン２４ａ、２４ｂを適宜回動することによって前面側あるいは後面側締板体２ａ、２ｂの回動支点２０ａ、２０ｂが復元される結果、前面側あるいは後面側締板体２ａ、２ｂが再び金型のクランプに供される状態に戻る、これら一連の運用方法や、あるいは本実施例に僅かな変更を加えることにより、予め前面側締板体２４ａのみを設けておき、後面側締板体で金型をクランプする必要が生じた場合には、前面側締板体２４ａを固定支持体１の前面側から取外し、固定支持体１後面側へ付け替えて使用する運用方法など、加工対象製品の特性に応じた運用方法により、加工対象製品の拡大が図られ、曲げ加工順序における柔軟性を増すなど、生産性の向上に優れた効果を奏し得る。 According to the clamping device of this embodiment, the operation for both the front side and rear side tightening plate bodies 2a and 2b related to the fixing and removal of the mold, that is, the related functions for setting the fixing, the intermediate position, and the open position are performed on the tightening plate. By consolidating the body into a separate mechanism, the functions of the tightening plate body can be simplified and the mechanism for mounting each tightening plate body to the fixed support 1 of the clamping device can be simplified. If it is predicted that the tightening plate on the side not used for the clamp will interfere with the processing, the interfering tightening plate can be removed in a short time without using a tool to process the target product. In the case of restoring the tightening plate body removed by a simple operation after processing, that is, when the front side or rear side tightening plate bodies 2a and 2b that are expected to interfere with the product to be processed are removed from the fixed support 1. The saddle 21a having a step on the lower surface integrally provided with the rectangular grooves 11a and 11b having a step on the bottom portion provided on the fixed support 1 and the front side or rear side tightening plate bodies 2a and 2b. Detachable pins 24a and 24b that regulate the disengagement of the meshing in a state where the 21b and the 21b mesh with each other at the respective step portions and form the rotation fulcrum points 20a and 20b of the front side or rear surface side clamp bodies 2a and 2b. By appropriately rotating the above-mentioned step portion, the engagement at the step portion can be disengaged, so that the front side or rear side tightening plate bodies 2a and 2b can be removed from the fixed support 1, while the other. When the front side or rear side clamps 2a and 2b are attached to the fixed support 1, the saddles 21a and 21b integrally provided on the front or rear side clamps 2a and 2b are attached to the fixed support 1. After being inserted into the grooves 11a and 11b of the above to form meshing at the stepped portion, the attachment / detachment pins 24a and 24b are appropriately rotated so that the rotation fulcrum 20a and 20b of the front side or rear side tightening plate bodies 2a and 2b are formed. As a result of the restoration, the front side or rear side tightening plate bodies 2a and 2b are returned to the state where they are subjected to the clamping of the mold again. If only the front side clamping plate body 24a is provided in advance and it becomes necessary to clamp the mold with the rear surface side clamping plate body, the front side clamping plate body 24a is removed from the front side of the fixed support 1 and fixed. Support 1 By operating methods according to the characteristics of the product to be machined, such as the operation method to replace it on the rear surface side, the product to be machined can be expanded and the flexibility in the bending order can be increased to improve productivity. Excellent Can have a positive effect.

通常、クランプ装置は、プレスブレーキ即ち機械本体１００において、複数個から大型機では数十個も使用される場合があり、前述のように本考案の個々のクランプ装置に設けられている進退体４の上下方向の進退に関しても、複数個の進退体４を連動して上下方向に進退させる進退機構６がクランプ装置の上方に設けられているが、本発明とは直接的な関連性がないことから当該部分の記述を省略している。 Usually, a plurality of clamp devices may be used in a press brake, that is, a machine body 100, or several tens of clamp devices in a large machine, and as described above, the advancing / retreating body 4 provided in each clamp device of the present invention. A moving / retreating mechanism 6 for moving a plurality of advancing / retreating bodies 4 in the vertical direction in conjunction with each other is provided above the clamp device, but it is not directly related to the present invention. The description of the relevant part is omitted from.

尚、本考案のクランプ装置は、上述の実施例にのみ限定されるものではなく、例えば、予め後面側締板体を設けることなく、前面側締板体のみ設け、後面側締板体が必要とされた場合に、前面側締板体を後面側に付け変えて使用することなど本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。 The clamp device of the present invention is not limited to the above-described embodiment. For example, the clamp device on the front surface side is provided only on the front surface side clamping plate body without providing the rear surface side clamping plate body in advance, and the rear surface side clamping plate body is required. Of course, various changes can be made within the range that does not deviate from the gist of the present invention, such as using the front side clamp body by changing it to the rear side.

本考案に係るクランプ装置は、プレスブレーキ用の上金型クランプ装置に限らず、鋼板の折り曲げ機械用の折り曲げ全般に使用することが可能である。 The clamping device according to the present invention can be used not only for the upper mold clamping device for press brakes but also for general bending of steel sheets for bending machines.

１固定支持体
２ａ、２ｂ締板体
３ａ、３ｂ弾性体
４進退体
５変換器
６進退機構
１１ａ、１１ｂ溝
１２ａ、１２ｂセンター溝
１３ａ、１３ｂセンターピン
２０ａ、２０ｂ回動支点
２１ａ、２１ｂサドル
２２ａ、２２ｂ保持金具
２３ａ、２３ｂ保持ボルト
２４ａ、２４ｂ脱着ピン
３１中間停止溝
３２中間停止ピン
３３中間停止レバー
５０ａ、５０ｂ回動中心
５１ａ、５１ｂカム板
５２プッシュロッド
６５変換基台
１００機械本体
１０１締付ボルト
１０２支え板
２０１溝部
Ｘａ、Ｘｂ金型 1 Fixed support 2a, 2b Tightening plate 3a, 3b Elastic body 4 Advance / retreat 5 Converter 6 Advance / retreat mechanism 11a, 11b Groove 12a, 12b Center groove 13a, 13b Center pin 20a, 20b Rotation fulcrum 21a, 21b Saddle 22a, 22b Holding bracket 23a, 23b Holding bolt 24a, 24b Detachable pin 31 Intermediate stop groove 32 Intermediate stop pin 33 Intermediate stop lever 50a, 50b Rotation center 51a, 51b Cam plate 52 Push rod 65 Converter base 100 Machine body 101 Tightening bolt 102 Support plate 201 Grooves Xa, Xb Mold

Claims

A fixed support (1) for fixedly supporting the mold (Xa, Xb) and
The front side and the rear surface are rotated around the respective rotation fulcrums (20a, 20b) on both sides of the cross section of the fixed support (1) and engaged with the engaging portions of the molds (Xa, Xb). Front side and rear side tightening plate bodies (2a, 2b) capable of clamping the respective molds (Xa, Xb) on the side, and
Each elastic body (3a, 3b) provided on the clamp portion side from the rotation fulcrum (20a, 20b) of each of the front side and rear side tightening plate bodies (2a, 2b).
A converter provided in the groove of the support plate (102) to convert the advancing / retreating body (4) advancing / retreating in one direction and the advancing / retreating of the advancing / retreating body (4) into movement in a direction orthogonal to the advancing / retreating direction of the advancing / retreating body (4). (5) is provided, and the amount of movement of the advancing / retreating body (4) can be adjusted as appropriate, and the amount of movement and the repulsive force of the elastic body (3a, 3b) allow the front side clamping plate body (2a) and the rear surface side tightening. The plate body (2b) is rotated clockwise or counterclockwise, and the mold (Xa, Xb) is fixed to the mold by the front side clamping plate (2a) and the rear side clamping plate (2b), or the mold is formed. In a removable clamp device
Rectangular grooves (11a, 11b) having a step at the bottom are provided on both the front side and the rear surface side of the fixed support (1), while the front side clamping plate body (2a) and the rear surface side clamping plate body (2b) are provided. ), Saddles (21a, 21b) having a step on the lower surface are integrally provided, and these stepped portions are meshed with each other, so that the meshing portion is used as the front side clamping plate body (2a) and the rear surface. The rotation fulcrum (20a, 20b) of the side clamp body (2b) is configured, and in addition to these configurations, the self-rotating body is appropriately rotated to regulate the disengagement of the above-mentioned meshing, and the above-mentioned step portion. By disengaging the engagement, the front side clamp body (2a) or the rear side clamp body (2b) is removed from the fixed support (1), or the engagement is performed again, and then the engagement is performed. Detachable pins (24a, 24b) that can restore the rotation fulcrum (20a, 20b) of the front side clamp body (2a) or the rear side clamp body (2b) by rotating itself as appropriate. A clamping device characterized by being provided.