JP2009262259A - Clamping tool of nonmagnetic material workpiece - Google Patents

Clamping tool of nonmagnetic material workpiece Download PDF

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JP2009262259A
JP2009262259A JP2008112836A JP2008112836A JP2009262259A JP 2009262259 A JP2009262259 A JP 2009262259A JP 2008112836 A JP2008112836 A JP 2008112836A JP 2008112836 A JP2008112836 A JP 2008112836A JP 2009262259 A JP2009262259 A JP 2009262259A
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magnetic
displacement
workpiece
clamping tool
elastic deformation
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Kensuke Wakamatsu
謙介 若松
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Tsudakoma Corp
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Tsudakoma Corp
Tsudakoma Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-handle clamping tool used for fixing a workpiece structured by a nonmagnetic material, to the chuck face of a magnetic chuck. <P>SOLUTION: The clamping tool includes: a base part 2 having a flat bottom face 6 on the bottom head 7 made of a magnetic material, the bottom head being used for attraction ; a displacement part 4 connected to the base part 2, the displacement part having a flat undersurface 8 on a bottom head 9 made of the same magnetic material; an abutment piece 5 provided detachably at the tip position of the displacement part 4, the abutment piece protruding higher than the top surface of the displacement part 4; and an elastic deformation part 3 elastically deformably mounted on the displacement part 4. The displacement part 4 is mounted to have an aperture between the magnetic chuck face 10 and the undersurface 8, and the elastic deformation part 3 is mounted on the displacement part 4 to deform by receiving a magnetic attractive force from the magnetic chuck face 10. When a magnetic force is generated on the magnetic chuck face 10, the bottom face 6 of the base part 2 is magnetically press-bonded to the magnetic chuck face 10, which causes a frictional force against the magnetic chuck face 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、非磁性体材料の加工物を磁気チャック装置の磁気チャック面に固定するためのクランプ工具に関する。 The present invention relates to a clamping tool for fixing a workpiece made of a non-magnetic material to a magnetic chuck surface of a magnetic chuck device.

特許文献１は、電磁式チャックのチャック面に非磁性材料の加工物を固定するクランプ工具を開示している。そのクランプ工具は、磁性体材料の単一の板部材で構成され、平面部と傾斜部とこれらの間に連続される薄肉部とを有する。より詳しくは、傾斜部の底面は、先端側に進むにつれて平面部の底面位置よりも高くなるように傾斜されており、また傾斜部の先端には、底面側に対して上面側が先端側に突出して当接面を構成する。そして機械加工に先立ち、電磁式チャックのチャック面に載置された加工物の両側に、対となるクランプ工具を配置し、それら傾斜部の各当接面が加工物の側面に当接するように、各クランプ工具が配置される。この状態では、傾斜部の底面と電磁チャックのクランプ面との間にテーパ状の隙間が設けられているが、磁気チャック面側から磁気力（磁力とも呼び、以下磁力とする。）が発生され磁気的吸引力が働くと、各傾斜部は薄肉部を起点としてして磁気チャック面に当接するように変位し、上記突出される当接面が加工物の側面をさらに押圧する。これにより、加工物は、対となるクランプ工具によって両側から挟み込まれるように保持されて、磁気チャック面上に固定される。 Patent Document 1 discloses a clamp tool for fixing a workpiece made of a non-magnetic material to a chuck surface of an electromagnetic chuck. The clamp tool is composed of a single plate member made of a magnetic material, and has a flat surface portion, an inclined portion, and a thin portion continuous between them. More specifically, the bottom surface of the inclined portion is inclined so as to become higher than the position of the bottom surface of the flat portion as it advances toward the distal end side, and the upper surface side protrudes toward the distal end side relative to the bottom surface side at the distal end of the inclined portion. To constitute a contact surface. Prior to machining, a pair of clamping tools are arranged on both sides of the workpiece placed on the chuck surface of the electromagnetic chuck so that each abutment surface of the inclined portion abuts the side surface of the workpiece. Each clamp tool is arranged. In this state, a tapered gap is provided between the bottom surface of the inclined portion and the clamp surface of the electromagnetic chuck, but magnetic force (also referred to as magnetic force, hereinafter referred to as magnetic force) is generated from the magnetic chuck surface side. When the magnetic attractive force is applied, each inclined portion is displaced so as to contact the magnetic chuck surface starting from the thin portion, and the protruding contact surface further presses the side surface of the workpiece. Thereby, the workpiece is held so as to be sandwiched from both sides by a pair of clamping tools, and is fixed on the magnetic chuck surface.

特許文献１の技術によると、加工物の高さ寸法がクランプ工具の肉厚程度であれば問題ないが、高さ寸法が大きい加工物に対し、低い位置での把持では、充分な把持力が得られないという問題がある。すなわち、加工物に対して切削や研磨等の加工をする際に、切削点（力点）に対して加工物を把持する作用点の位置が低い位置にある場合、電磁チャック面を支点とするレバー比の関係から切削力を受け止める作用点により大きな力が必要である。そこで、作用点の位置が高い（肉厚の大きい）より大型化したクランプ工具を用いることも考えられるが、大型化する分重量が増え、加工物を脱着する現場作業者には扱いにくい。
実開昭６３−１９７０５１号公報 According to the technique of Patent Document 1, there is no problem as long as the height dimension of the workpiece is about the thickness of the clamping tool. However, a sufficient gripping force is obtained when gripping a workpiece with a large height dimension at a low position. There is a problem that it cannot be obtained. In other words, when processing the workpiece, such as cutting or polishing, if the position of the action point for gripping the workpiece is lower than the cutting point (power point), the lever with the electromagnetic chuck surface as a fulcrum A large force is required for the action point that receives the cutting force from the relationship of the ratio. Thus, although it is conceivable to use a clamp tool that is larger than the position of the action point that is high (thickness is large), the size increases and the weight increases, making it difficult for a field worker to remove and attach the workpiece.
Japanese Utility Model Publication No. 63-197051

したがって、本発明の課題は、非磁性材料で構成される加工物を、磁気チャックのチャック面に固定する際に用いられるクランプ工具で、取扱い容易なクランプ工具を提供することである。 Accordingly, an object of the present invention is to provide a clamp tool that is easy to handle with a clamp tool used when a workpiece made of a non-magnetic material is fixed to a chuck surface of a magnetic chuck.

上記課題のもとに、本発明は、磁性体材料で設けられる吸着用の下端部（７）に平坦な底面（６）を有するベース部（２）と、同じく磁性体材料で設けられる吸引用の下端部（９）に平坦な下面（８）を有し、ベース部（２）に連結される変位部（４）と、変位部（４）の先端位置で変位部（４）の上面（１ｃ）より高い位置に突出するとともに、変位部（４）に対して取り外し可能に設けられるか、またはベース部（２）と一体に変位する変位部（４）に一体的に設けられた部材に対して取り外し可能に設けられる当接片（５）と、変位部（４）に弾性変形可能に設けられる弾性変形部（３）と、を備える。さらに、ベース部（２）の下端部（７）を介して磁気チャック面（１０）上に設置された状態で、前記変位部（４）は、磁気チャック面（１０）と下面（８）との間に隙間を有するように設けられており、磁気チャック面（１０）からの磁力発生時には、ベース部（２）の底面（６）が磁気チャック面（１０）に磁気的に圧着されるとともに、弾性変形部（３）は、変位部（４）の下端部（９）に作用する磁気的吸引力を受けて弾性変形されるように変位部（４）に設けられる（請求項１）。上記の構成は、後述する実施例１、実施例１の変形例、実施例２、実施例２の変形例に対応している。なお、説明の都合上、ベース部（２）、および変位部（４）あるいはこれらを構成する板部材について、当接片５が取付けられる側を先端側とし、これの反対側を基端側として呼ぶことにする。 Based on the above problems, the present invention provides a base portion (2) having a flat bottom surface (6) at a lower end portion (7) for adsorption provided with a magnetic material, and a suction material provided with a magnetic material. The lower surface (9) has a flat lower surface (8), the displacement portion (4) connected to the base portion (2), and the upper surface of the displacement portion (4) at the tip position of the displacement portion (4) ( 1c) A member that protrudes to a higher position and is detachable with respect to the displacement portion (4), or is integrally provided with the displacement portion (4) that is displaced integrally with the base portion (2). A contact piece (5) provided detachably on the other hand, and an elastic deformation part (3) provided on the displacement part (4) so as to be elastically deformable. Further, the displacement part (4) is installed on the magnetic chuck surface (10) via the lower end part (7) of the base part (2), and the displacement part (4) includes the magnetic chuck surface (10), the lower surface (8), and When the magnetic force is generated from the magnetic chuck surface (10), the bottom surface (6) of the base portion (2) is magnetically pressure-bonded to the magnetic chuck surface (10). The elastic deformation portion (3) is provided in the displacement portion (4) so as to be elastically deformed by receiving a magnetic attractive force acting on the lower end portion (9) of the displacement portion (4). The above configuration corresponds to a first embodiment, a modification of the first embodiment, a second embodiment, and a second embodiment. For the convenience of explanation, the base part (2) and the displacement part (4) or the plate members constituting them are defined as a distal end side on which the contact piece 5 is attached and a base end side on the opposite side. I will call it.

前記非磁性体加工物のクランプ工具（１）において、変位部（４）の下面（８）は、非磁力発生状態の磁気チャック面（１０）にベース部（２）の下端部（７）を介して設置された状態で、ベース部（２）の底面（６）に対して平行かまたは変位部（４）の先端側に向けて高さ方向に低くなる傾斜態様のいずれかにより平面状に形成されるとともに、変位部（４）の下面（８）の先端部の高さ方向の位置は、ベース部（２）の底面（６）の位置よりも高くなるように設けられることにより前記隙間が設けられており、変位部（４）には、前記ベース部（２）と当接片（５）が取付けられる取付部との間の少なくとも領域の一部に、磁力発生状態における磁気チャック面（１０）からの磁気的な吸引力を受けて弾性変形可能な肉厚の弾性変形部（３）が設けられる（請求項２）。また、ベース部（２）と変位部（４）は、単一の板部材（１ａ）で構成されるとともに、弾性変形部（３）は、前記領域の少なくとも一部でベース部（２）の肉厚よりも薄く設けられる（請求項３）。上記の構成は、後述する実施例１、実施例１の変形例に対応している。 In the non-magnetic workpiece clamping tool (1), the lower surface (8) of the displacement portion (4) has a lower end portion (7) of the base portion (2) on the magnetic chuck surface (10) in a non-magnetic force generation state. In a state of being installed in a plane, either in parallel with the bottom surface (6) of the base portion (2) or in an inclined manner that decreases in the height direction toward the distal end side of the displacement portion (4). The gap is formed by being formed so that the position in the height direction of the tip of the lower surface (8) of the displacement portion (4) is higher than the position of the bottom surface (6) of the base portion (2). The displacement portion (4) has a magnetic chuck surface in a magnetic force generation state at least in a part of the region between the base portion (2) and the attachment portion to which the contact piece (5) is attached. Thick elastic deformable portion that can be elastically deformed by receiving the magnetic attraction force from (10) 3) it is provided (claim 2). Further, the base part (2) and the displacement part (4) are constituted by a single plate member (1a), and the elastic deformation part (3) is at least part of the region of the base part (2). It is provided thinner than the wall thickness (Claim 3). The above-described configuration corresponds to a first embodiment described later and a modification of the first embodiment.

前記非磁性体加工物のクランプ工具（１）において、前記弾性変形部（３）には、変位部（４）の先端側の肉厚よりも薄肉の薄肉部（１２）を変位部（４）の前記領域の一部に形成している（請求項４）。上記の構成は、後述する実施例１に対応している。 In the clamping tool (1) for the non-magnetic workpiece, the elastically deformable portion (3) is provided with a thin-walled portion (12) thinner than the thickness on the distal end side of the displaced portion (4). Are formed in a part of the region (claim 4). The above configuration corresponds to Example 1 described later.

前記非磁性体加工物のクランプ工具（１）において、弾性変形部（３）は、弾性変形可能な材料で、変位部（４）の先端近傍の下面（８）より突出するように板部材（１ｅ）に設けられており、非磁力発生状態の磁気チャック面（１０）に、ベース部（２）の下端部（７）と突出される弾性変形部（３）とを介して設置された状態で、変位部（４）の下面（８）と磁気チャック面（１０）との間に隙間を形成している（請求項５）。また、ベース部（２）と変位部（４）は、単一の板部材（１ａ）で構成される（請求項６）。上記の構成は、後述する実施例２に対応している。 In the non-magnetic workpiece clamping tool (1), the elastically deformable portion (3) is made of an elastically deformable material and is a plate member (8) protruding from the lower surface (8) in the vicinity of the distal end of the displaced portion (4). 1e) and installed on the magnetic chuck surface (10) in a non-magnetic force generation state via the lower end (7) of the base portion (2) and the elastic deformation portion (3) protruding. Thus, a gap is formed between the lower surface (8) of the displacement portion (4) and the magnetic chuck surface (10). The base part (2) and the displacement part (4) are constituted by a single plate member (1a). The above configuration corresponds to Example 2 described later.

前記非磁性体加工物のクランプ工具（１）において、弾性変形部（３）が設けられる変位部（４）の下端部（９）には、埋め込み用の溝（１４）が形成されるとともに、弾性変形部（３）は、溝（１４）の上底部に接した状態に収容されており、かつ弾性変形部（３）は、非磁力発生状態の磁気チャック面（１０）にベース部（２）の下端部（７）を介して設置された状態で、変位部（４）の下面（８）より下方に突出するように設けられる（請求項７）。上記の構成は、後述する実施例２の変形例に対応している。 In the clamping tool (1) of the non-magnetic workpiece, an embedding groove (14) is formed at the lower end (9) of the displacement part (4) where the elastic deformation part (3) is provided, The elastic deformation portion (3) is accommodated in contact with the upper bottom portion of the groove (14), and the elastic deformation portion (3) is formed on the magnetic chuck surface (10) in a non-magnetic force generation state on the base portion (2 ) Is provided so as to protrude downward from the lower surface (8) of the displacement portion (4). The above configuration corresponds to a modification of Example 2 described later.

前記非磁性体加工物のクランプ工具（１）において、当接片（５）は、磁力発生時の磁気的吸引力によって変位部（４）が変位する際に、変位部（４）の上面（１ｃ）に対応する高さ位置から加工物（１５）への当接点までの領域の一部が弾性変形可能に設けられる（請求項８）。上記の構成は、後述する実施例１、実施例２に対応している。 In the clamping tool (1) for the non-magnetic workpiece, the abutment piece (5) has an upper surface (when the displacement part (4) is displaced by the magnetic attraction force when the magnetic force is generated ( A part of the region from the height position corresponding to 1c) to the contact point to the workpiece (15) is provided so as to be elastically deformable (Claim 8). The above configuration corresponds to Example 1 and Example 2 described later.

前記非磁性体加工物のクランプ工具（１）において、当接片（５）は、単一の板部材で構成されており、変位部（４）の上面（１ｃ）よりも高い位置において、加工物（１５）に対する板部材の当接面（１６）は、磁気チャック面（１０）に対する垂直線（ｕ）に対し加工物（１５）側にわずかに傾斜するように変位部（４）に取付けられる（請求項９）。上記の構成は、後述する実施例１、実施例２に対応している。 In the non-magnetic workpiece clamping tool (1), the contact piece (5) is formed of a single plate member, and is processed at a position higher than the upper surface (1c) of the displacement portion (4). The contact surface (16) of the plate member with respect to the workpiece (15) is attached to the displacement portion (4) so as to be slightly inclined toward the workpiece (15) with respect to the vertical line (u) with respect to the magnetic chuck surface (10). (Claim 9). The above configuration corresponds to Example 1 and Example 2 described later.

請求項１によると、次の作用効果が得られる。非磁性体加工物のクランプ工具（１）は、ベース部（２）に連結された変位部（４）の先端位置に、変位部（４）の上面（１ｃ）より高い位置に突出するように当接片（５）が取付けられることで、側面方向より見て全体的に略Ｌ字状に設けられ、変位部（４）の上面（１ｃ）よりも高い位置に加工物への当接部を構成する。これにより、特許文献１のような肉厚を大きくしたクランプ工具に比べて軽量化できるため、加工物（１５）の着脱作業を受け持つ現場作業者の負担を軽減でき、取り扱いが容易に行える。そして機械加工に先立ち、まず磁気チャックのチャック面（１０）に加工物（１５）を載置し、加工物の両側に、対となるクランプ工具（１）の当接片（５）の一部(当接部)が、加工物（１５）の側面あるいは上面に当接するように配置される。この状態では、ベース部（２）の下端部（７）の底面（６）は、磁気チャック面（１０）に接した状態にあり、また変位部（４）の下端部（９）の下面（８）と磁気チャック面（１０）との間に、隙間が設けられている。 According to the first aspect, the following effects can be obtained. The non-magnetic workpiece clamping tool (1) projects at a position higher than the upper surface (1c) of the displacement portion (4) at the tip position of the displacement portion (4) connected to the base portion (2). By attaching the abutting piece (5), the abutting portion to the workpiece is provided at a position higher than the upper surface (1c) of the displacing portion (4). Configure. Thereby, since it can reduce in weight compared with the clamp tool which enlarged the wall thickness like patent document 1, the burden of the field worker who takes care of attachment and detachment work of a work piece (15) can be eased, and handling can be performed easily. Prior to machining, the workpiece (15) is first placed on the chuck surface (10) of the magnetic chuck, and a part of the contact piece (5) of the pair of clamping tools (1) on both sides of the workpiece. The (contact portion) is disposed so as to contact the side surface or the upper surface of the workpiece (15). In this state, the bottom surface (6) of the lower end portion (7) of the base portion (2) is in contact with the magnetic chuck surface (10), and the lower surface (9) of the lower end portion (9) of the displacement portion (4) ( A clearance is provided between 8) and the magnetic chuck surface (10).

そして、磁気チャック装置の磁気チャック面（１０）から磁力を発生させると、ベース部（２）の下端部（７）の底面（６）は、磁気チャック面（１０）への吸着にともなって発生される摩擦力によって、ベース部（２）は、後述される変位部（４）や当接片（５）の変位に備えた必要な保持力で、磁気チャック面（１０）に移動不能に固定される。一方で、磁気チャック面（１０）からの磁力は、変位部(４)にも働く。磁力発生前には、変位部（４）は、磁気チャック面（１０）と下面（８）との間で隙間を有しているが、磁力の発生により、磁気的な吸引力が変位部（４）の下端部（９）に働くため、ベース部（２）との連結点付近（具体的には、先端位置２ｂ）を支点として、変位部（４）の下端部（９）の先端側が磁気チャック面（１０）に吸い寄せられるように変位され、弾性変形部（３）は、弾性変形する。 When a magnetic force is generated from the magnetic chuck surface (10) of the magnetic chuck device, the bottom surface (6) of the lower end (7) of the base portion (2) is generated along with the adsorption to the magnetic chuck surface (10). The base portion (2) is fixed to the magnetic chuck surface (10) so as to be immovable by a necessary holding force in preparation for displacement of the later-described displacement portion (4) and the contact piece (5) by the frictional force applied. Is done. On the other hand, the magnetic force from the magnetic chuck surface (10) also acts on the displacement part (4). Before the magnetic force is generated, the displacement portion (4) has a gap between the magnetic chuck surface (10) and the lower surface (8). 4) acts on the lower end portion (9), so that the distal end side of the lower end portion (9) of the displacement portion (4) is located near the connection point with the base portion (2) (specifically, the distal end position 2b). The elastic deformation portion (3) is elastically deformed by being displaced so as to be attracted to the magnetic chuck surface (10).

他方、変位部（４）と一体の当接片（５）は、変位部(４)の上面（１ｃ）よりも上方に突出する位置で、加工物の側面または上面に対して当接するように配置されているため、当接片（５）は、加工物（１５）に当接したまま全体的に歪みを増すように(撓むように)弾性変形する。このようにクランプ工具（１）は、磁気チャック面（１０）からの磁気的な吸着力によって、ベース部（２）の底面（６）が磁気チャック面（１０）に強固に圧接され、変位部（４）に働く吸引力によって変位部(４)、およびこれと一体の当接片（５）を円弧状の軌跡に変位させ、当接片（５）の歪みにともなう反力を加工物の側面あるいは上面への押圧力として作用させることができる。このようにして、磁気的吸引力によって吸着できない非磁性体材料の加工物（１５）を、クランプ工具（１）を介して、磁気チャック面（１０）上に強固に固定することができる。 On the other hand, the contact piece (5) integrated with the displacement portion (4) is in a position protruding above the upper surface (1c) of the displacement portion (4) so as to contact the side surface or the upper surface of the workpiece. Due to the arrangement, the contact piece (5) is elastically deformed so as to increase the overall strain (bend) while remaining in contact with the workpiece (15). As described above, the clamping tool (1) has the bottom surface (6) of the base portion (2) firmly pressed against the magnetic chuck surface (10) by the magnetic attractive force from the magnetic chuck surface (10), and the displacement portion. The displacement part (4) and the contact piece (5) integral with the displacement part (4) are displaced to an arcuate locus by the suction force acting on (4), and the reaction force due to the distortion of the contact piece (5) is applied to the workpiece. It can act as a pressing force to the side surface or the upper surface. In this way, the non-magnetic material workpiece (15) that cannot be attracted by the magnetic attractive force can be firmly fixed on the magnetic chuck surface (10) via the clamp tool (1).

その上、当接片（５）は、変位部（４）の先端に位置するとともに、変位部（４）の上面（１ｃ）より高い位置に突出して設けられていて、加工物（１５）を従来に比べて高い位置で、言い換えれば切削点などの加工位置に近い位置で、押圧（挟持）することができるから、非磁性材料の加工物（１５）をより安定的に確実に保持できる。また当接片（５）は、変位部（４）に対して直接または間接的に取り外し可能に設けられるから、加工物（１５）の大きさ（高さ寸法、幅寸法）、硬度、などに応じて弾性の異なるものを取り替えて用いることができ、加工物（１５）に対応する当接片（５）を必要な把持力に応じて複数用意すれば良く、管理もし易くなる。 In addition, the abutting piece (5) is located at the tip of the displacement part (4), and is provided so as to protrude higher than the upper surface (1c) of the displacement part (4). Since it can be pressed (clamped) at a position higher than before, in other words, at a position close to a processing position such as a cutting point, the workpiece (15) of the nonmagnetic material can be more stably and reliably held. Further, since the contact piece (5) is detachable directly or indirectly with respect to the displacement part (4), the size (height dimension, width dimension), hardness, etc. of the work piece (15) can be adjusted. Depending on the required gripping force, a plurality of contact pieces (5) corresponding to the workpiece (15) may be prepared and managed easily.

請求項２によると、請求項１の発明をより具体的に構成することができ、しかも次の作用効果が得られる。磁気チャック面（１０）に載置された加工物（１５）の両側に、対となるクランプ工具（１）の当接片（５）が、加工物の側面あるいは上面に当接するように配置した状態では、ベース部の下端部（７）の底面（６）は磁気チャック面（１０）に接した状態にある。そして、磁気チャック面（１０）から磁力が発生されると、ベース部（２）の底面（６）は、磁気チャック面（１０）に吸着され生じる摩擦力によって、磁気チャック面（１０）に移動不能に固定される。変位部（４）の下面（８）は、非磁力発生状態の磁気チャック面（１０）にベース部（２）の下端部（７）を介して設置された状態で、ベース部（２）の底面（６）に対して平行または変位部（４）の先端側に向けて高さ方向に低くなる傾斜態様のいずれかにより平面状に形成されるとともに、変位部（４）の下面（８）の先端部の高さ方向の位置は、ベース部（２）の底面（６）の位置よりも高くなるように設けられている。このため、上記配置された状態では、下面（８）と底面（６）との高さの違いによって、磁気チャック面（１０）と下面（８）との間に、変位部（４）の変位に必要な隙間が設けられ、前記ベース部（２）と当接片（５）が取付けられる取付部との間の少なくとも一部の領域に、磁力発生状態における磁気チャック面（１０）からの吸引力を受けて弾性変形可能な肉厚の弾性変形部（３）が設けられる。 According to claim 2, the invention of claim 1 can be configured more specifically, and the following effects can be obtained. On both sides of the workpiece (15) placed on the magnetic chuck surface (10), the contact pieces (5) of the paired clamping tool (1) are arranged so as to contact the side surface or the upper surface of the workpiece. In the state, the bottom surface (6) of the lower end portion (7) of the base portion is in contact with the magnetic chuck surface (10). When a magnetic force is generated from the magnetic chuck surface (10), the bottom surface (6) of the base portion (2) moves to the magnetic chuck surface (10) by the frictional force generated by being attracted to the magnetic chuck surface (10). Fixed to impossible. The lower surface (8) of the displacement portion (4) is placed on the magnetic chuck surface (10) in a non-magnetic force generation state via the lower end portion (7) of the base portion (2), and the base portion (2). It is formed in a planar shape by any one of the inclined modes that are parallel to the bottom surface (6) or lowered in the height direction toward the distal end side of the displacement portion (4), and the lower surface (8) of the displacement portion (4). The position of the tip part in the height direction is provided to be higher than the position of the bottom surface (6) of the base part (2). For this reason, in the arranged state, the displacement portion (4) is displaced between the magnetic chuck surface (10) and the lower surface (8) due to the difference in height between the lower surface (8) and the bottom surface (6). The at least part of the region between the base portion (2) and the mounting portion to which the abutting piece (5) is attached is attracted from the magnetic chuck surface (10) when a magnetic force is generated. A thick elastic deformation portion (3) that is elastically deformable under force is provided.

好ましくは、請求項３のように、ベース部（２）と変位部（４）と弾性変形部（３）は、単一の板部材（１ａ）で構成し、弾性変形部（３）は、前記領域の少なくとも一部でベース部（２）の肉厚よりも薄く設けられる。これによって、単純化された構造で、製造コストをより削減することが可能になるとともに、例えば、適切な肉厚の領域を長く設けることで弾性変形可能な領域を長く設けることができ、これによって変位部（４）と単一に設けられる弾性変形部（３）を、磁気的吸引力が働いたときに全体的に変形させることができるため、いわゆる局所的な応力集中を分散できる分、長命になる。 Preferably, as in claim 3, the base portion (2), the displacement portion (4) and the elastic deformation portion (3) are constituted by a single plate member (1a), and the elastic deformation portion (3) At least a part of the region is provided thinner than the thickness of the base part (2). As a result, it is possible to further reduce the manufacturing cost with a simplified structure, and for example, it is possible to provide a region that can be elastically deformed by providing a region having an appropriate thickness for a long time. The displacement part (4) and the elastic deformation part (3) provided in a single unit can be deformed as a whole when a magnetic attraction force is applied, so that the so-called local stress concentration can be dispersed, resulting in long life. become.

さらに、請求項３によると、前記非磁性体加工物のクランプ工具（１）において、前記弾性変形部（３）は、変位部（４）の先端側の肉厚よりも薄い薄肉部（１２）を変位部（４）の前記領域内に形成しているから、薄肉部（１２）の肉厚によって弾性変形部（３）の弾性変形の度合いが適切に設定できる。また、薄肉部（１２）を有しない、例えば変位部（４）が、先端側の肉厚と同じ肉厚に設けられることで実質的に弾性変形部（３）の機能を有するクランプ工具に比べ、必要な弾性変形の特性が容易に得られる。例えば、変位部（４）がより小さな力で確実に大きく変位し、この結果当接片（５）の歪みにともなう反力が大きくなる分、加工物（１５）に対してより大きな押圧力が得られる。請求項４によると、ベース部（２）と変位部（４）とが単一の板部材に設けられるクランプ工具（１）では、このような薄肉部（１２）を、ベース部（２）と変位部（４）の先端との間である前記領域内に、変位部（４）の底面（８）あるいは上面（１ｃ）のうち１以上に溝（１８）として形成することができる。 Furthermore, according to claim 3, in the clamping tool (1) of the non-magnetic workpiece, the elastically deformable portion (3) is a thin portion (12) that is thinner than the thickness of the distal end side of the displacement portion (4). Is formed in the region of the displacement portion (4), the degree of elastic deformation of the elastic deformation portion (3) can be appropriately set by the thickness of the thin wall portion (12). Moreover, compared with the clamp tool which does not have a thin part (12), for example, a displacement part (4) is provided in the same thickness as the thickness of the front end side, and has a function of an elastic deformation part (3) substantially. The necessary elastic deformation characteristics can be easily obtained. For example, the displacement part (4) is surely greatly displaced with a smaller force, and as a result, the reaction force accompanying the distortion of the contact piece (5) is increased, so that a larger pressing force is applied to the workpiece (15). can get. According to claim 4, in the clamping tool (1) in which the base part (2) and the displacement part (4) are provided on a single plate member, such a thin part (12) is replaced with the base part (2). One or more of the bottom surface (8) or the top surface (1c) of the displacement portion (4) can be formed as a groove (18) in the region between the tip of the displacement portion (4).

請求項５によると、請求項１の発明をより具体的に構成することができ、しかも次の作用効果が得られる。前記非磁性体加工物のクランプ工具（１）において、弾性変形部（３）は、弾性変形可能な材料で、変位部（４）の先端近傍の位置の下面（８）より突出するように前記板部材（１ｅ）に設けられていて、非磁力発生状態の磁気チャック面（１０）に、ベース部（２）の下端部（７）と突出される弾性変形部(３)とを介して載置された状態では、変位部（４）の下面と磁気チャック面（１０）との間に隙間を形成する一方、板部材（１ｅ）の基端側の一部の下面が磁気チャック面（１０）に受けられている。そして、磁気チャック面(１０)から磁力が発生されると、磁性体材料で設けられる板部材全体に磁気的な吸引力が働き、弾性変形部（３）は歪みながら、板部材（１ｅ）が全体として磁気チャック面（１０）に吸い寄せられる。その中で、磁気的吸引力は、特に磁気チャック面に当接する領域や隙間の小さいこれらの近傍領域に大きな吸着力を生じせしめ、板部材（１ｅ）が撓むように弾性変形して磁気チャック面（１０）に密着される。このように密着される領域の摩擦力によって、クランプ工具（１）は、移動不能に固定されるとともに、吸い寄せられた板部材（１ｅ）は、上記密着された領域を支点に、弾性変形部（３）が歪み変形しつつ、下面とチャック面(１０)との間の隙間が小さくなるようにさらに接近し、吸い寄せられる。 According to claim 5, the invention of claim 1 can be configured more specifically, and the following effects can be obtained. In the non-magnetic workpiece clamping tool (1), the elastic deformation portion (3) is made of an elastically deformable material and protrudes from the lower surface (8) at a position near the tip of the displacement portion (4). The plate member (1e) is mounted on the magnetic chuck surface (10) in a non-magnetic force generation state via a lower end portion (7) of the base portion (2) and an elastic deformation portion (3) protruding. In the placed state, a gap is formed between the lower surface of the displacement portion (4) and the magnetic chuck surface (10), while a part of the lower surface on the base end side of the plate member (1e) is formed on the magnetic chuck surface (10). ). When a magnetic force is generated from the magnetic chuck surface (10), a magnetic attractive force acts on the entire plate member made of the magnetic material, and the elastic deformation portion (3) is distorted while the plate member (1e) The whole is attracted to the magnetic chuck surface (10). Among them, the magnetic attraction force generates a large attracting force particularly in the region in contact with the magnetic chuck surface and in the vicinity of these small gaps, so that the plate member (1e) is elastically deformed to bend and the magnetic chuck surface ( 10). The clamping tool (1) is fixed so as not to move due to the frictional force of the contacted area as described above, and the sucked plate member (1e) has an elastic deformation portion ( While 3) is deformed and deformed, it is further approached and sucked so that the gap between the lower surface and the chuck surface (10) becomes smaller.

つまり、クランプ工具（１）を構成する板部材のうち、磁気チャック面(１０)からの磁力発生時に、下面が磁気チャック面（１０）に密着される領域が、実質的にベース部（２）として機能するとともに、板部材のこれより先端側の領域が、基端側の下面の当接位置を中心として円弧を描くように変位する変位部（４）として機能される。このようにして、磁力発生状態では、単一の板部材（１ｅ）の変位部（４）全体にわたり磁気チャック面（１０）に吸い寄せられて、ベース部（２）に近い領域で圧接状態となり、板部材の変位量、ひいては当接片（５）の変位量も大きくなるため、加工物（１５）に対して適切な押圧力が得られ、確実に保持できる。 That is, in the plate member constituting the clamping tool (1), when the magnetic force is generated from the magnetic chuck surface (10), the region where the lower surface is in close contact with the magnetic chuck surface (10) is substantially the base portion (2). In addition, the region on the front end side of the plate member functions as a displacement portion (4) that is displaced so as to draw an arc around the contact position of the lower surface on the base end side. In this way, in the magnetic force generation state, the entire displacement portion (4) of the single plate member (1e) is attracted to the magnetic chuck surface (10) and is brought into a pressure contact state in a region close to the base portion (2). Since the amount of displacement of the plate member, and hence the amount of displacement of the contact piece (5), increases, an appropriate pressing force can be obtained on the workpiece (15) and can be reliably held.

請求項６に示したように、ベース部（２）と変位部（４）は、連続する単一の板部材（１ｅ）で構成されることにより、単純化された構造で、製造コストをより削減することができる。しかも、適切な肉厚の領域を長く設けることができ、弾性変形部（３）を磁気的吸引力が働いたときに全体的に変形させることができるため、いわゆる局所的な応力集中を分散できる分、長命になる。 As shown in claim 6, the base portion (2) and the displacement portion (4) are constituted by a single continuous plate member (1e), thereby simplifying the structure and reducing the manufacturing cost. Can be reduced. In addition, a region having an appropriate thickness can be provided long, and the elastic deformation portion (3) can be deformed as a whole when a magnetic attractive force is applied, so that so-called local stress concentration can be dispersed. Minutes, long life.

請求項７によると、前記非磁性体加工物のクランプ工具（１）において、変位部（４）の下面（８）の弾性変形部（３）が設けられる位置には、埋め込み用の溝（１４）が形成されるとともに、非磁力発生状態には、弾性変形部（３）は、前記溝（１４）の上底部に接した状態で変位部（４）の下面（８）より下方に突出するように設けられるから、いわゆる埋め込み用の溝無し構成のように、変位部（４）の下面に直接取付けるときに比べ、弾性変形部（３）の高さ寸法の制約が緩和されるとともに、圧縮方向の力を、埋め込まれた材料全体で受けることができる。この例によれば、弾性変形部（３）は大きく弾性変形し、弾性変形部（３）の弾力、すなわち採用可能な材料の選択の自由度が増える分、クランプ工具の製造コストをより抑えることが可能になるとともに、弾性変形部（３）がより長命になる。 According to claim 7, in the clamping tool (1) of the non-magnetic workpiece, the embedding groove (14) is provided at the position where the elastic deformation portion (3) of the lower surface (8) of the displacement portion (4) is provided. ) And the elastically deforming portion (3) projects downward from the lower surface (8) of the displacement portion (4) in a state of being in contact with the upper bottom portion of the groove (14) in a non-magnetic force generation state. Therefore, as in the case of a so-called embedding-free groove configuration, the restriction on the height dimension of the elastic deformation portion (3) is relaxed and the compression is reduced as compared with the case where it is directly attached to the lower surface of the displacement portion (4). Directional forces can be applied across the embedded material. According to this example, the elastically deforming portion (3) is greatly elastically deformed, and the elasticity of the elastically deforming portion (3), that is, the degree of freedom in selecting an applicable material is increased, thereby further reducing the manufacturing cost of the clamping tool. Becomes possible, and the elastically deformable portion (3) has a longer life.

請求項８によると、前記非磁性体加工物のクランプ工具（１）において、当接片（５）は磁力発生時の磁気的吸引力によって変位部（４）が変位する際に、加工物（１５）に対する当接状態を維持しつつ変位部（４）の上面（１ｃ）に対応する高さ位置から加工物（１５）への当接点までの領域の一部に弾性変形可能に設けられるから、磁力発生にともなう当接片(５)の弾性変形によって、変位部（４）の下端部（９）が磁気チャック面（１０）に確実に接近する。一方、変位部（４）が磁気チャック面（１０）に確実に接近するほど、変位部（４）の磁気的吸引力が著しく増大し、変位部（４）の作用点から当接片（５）に大きな力が加わることになるが、当接片（５）の弾力によって、変位部（４）に働く磁気的吸引力よりも抑えられた適切な力で押圧できる。よって過剰な力で押圧把持することによって加工物（１５）を変形させたり、傷つけるような不都合も発生しない。 According to claim 8, in the clamping tool (1) for the non-magnetic workpiece, the contact piece (5) is displaced when the displacement portion (4) is displaced by the magnetic attractive force when the magnetic force is generated. 15) Since it is provided in a part of the region from the height position corresponding to the upper surface (1c) of the displacement portion (4) to the contact point to the workpiece (15) while maintaining the contact state with respect to 15). Due to the elastic deformation of the contact piece (5) accompanying the generation of the magnetic force, the lower end (9) of the displacement part (4) reliably approaches the magnetic chuck surface (10). On the other hand, the closer the displacement portion (4) is to the magnetic chuck surface (10), the more the magnetic attractive force of the displacement portion (4) increases, and the contact piece (5) from the operating point of the displacement portion (4). However, the elastic force of the contact piece (5) makes it possible to press with an appropriate force that is less than the magnetic attractive force acting on the displacement portion (4). Therefore, there is no inconvenience that the workpiece (15) is deformed or damaged by pressing and holding with an excessive force.

請求項９によると、前記非磁性体加工物のクランプ工具（１）において、当接片（５）は単一の板部材で構成されており、変位部（４）の上面（１ｃ）よりも高い位置において、加工物（１５）に対する板部材の当接面（１６）は、磁気チャック面（１０）に対する垂直線（ｕ）に対し加工物（１５）側にわずかに傾斜するように変位部（４）の先端に取付けられるため、取り扱いが容易であるとともに、簡略化された構成でありながら、変位部(４)の変位にともなう力をより効率的に当接片(５)に伝えることができ、クランプ工具（１）のセット作業、すなわち当接片（５）を加工物（１５）に当接するように配置する作業が容易に行える。 According to claim 9, in the clamping tool (1) of the non-magnetic workpiece, the contact piece (5) is formed of a single plate member, and is more than the upper surface (1c) of the displacement part (4). At a high position, the contact surface (16) of the plate member with respect to the workpiece (15) is displaced so as to be slightly inclined toward the workpiece (15) with respect to the vertical line (u) with respect to the magnetic chuck surface (10). Since it is attached to the tip of (4), it is easy to handle and, while having a simplified configuration, more efficiently transmits the force accompanying the displacement of the displacement part (4) to the contact piece (5). The clamping tool (1) can be easily set, that is, the abutting piece (5) can be arranged so as to abut on the workpiece (15).

〔実施例１（図１ないし図３）〕
図１ないし図３は、本発明に係る実施例１の非磁性体加工物のクランプ工具１を示している。図１ないし図３において、非磁性体加工物のクランプ工具１は、大まかに言えば、肉厚ｔ０の板部材１ａと、肉厚ｔ５の板状の当接片５とからなり、磁性体材料で設けられる板部材１ａは、長手方向の一半部にベース部２と、他半部に変位部４とを備えている。 [Example 1 (FIGS. 1 to 3)]
1 to 3 show a clamp tool 1 for a non-magnetic workpiece according to a first embodiment of the present invention. 1 to 3, a clamping tool 1 for a non-magnetic workpiece is roughly composed of a plate member 1a having a wall thickness t0 and a plate-shaped contact piece 5 having a wall thickness t5. The plate member 1a provided in (1) includes a base portion 2 in one half of the longitudinal direction and a displacement portion 4 in the other half.

板部材１ａの基端側であるベース部２は、平坦な底面６を有する吸着用の下端部７を有しており、下端部７を介して磁気チャック装置の磁気チャック面１０に設置可能に設けられている。また、ベース部２に連続して設けられる変位部４には、平坦な下面８を有する吸引用の下端部９を有している。ベース部２および変位部４が設けられる板部材１ａは、ほぼ同じ高さの上面１ｂおよび上面１ｃをそれぞれ有するとともに、変位部４の下面８がベース部２の底面６の位置よりも高くなるように設けられていて、ベース部２の下端部７を介して磁気チャック面１０に設置された状態で、磁気チャック面１０と下面８との間に、後述される磁気的吸引の際に必要な隙間δを形成している。なお、板部材１ａの上面１ｂには、磁気クランプ装置から取り外しの際に用いる取っ手１７が取付けられている。 The base portion 2 which is the base end side of the plate member 1 a has a lower end portion 7 for suction having a flat bottom surface 6, and can be installed on the magnetic chuck surface 10 of the magnetic chuck device via the lower end portion 7. Is provided. Further, the displacement portion 4 provided continuously with the base portion 2 has a lower end portion 9 for suction having a flat lower surface 8. The plate member 1a on which the base portion 2 and the displacement portion 4 are provided has the upper surface 1b and the upper surface 1c having substantially the same height, and the lower surface 8 of the displacement portion 4 is higher than the position of the bottom surface 6 of the base portion 2. Necessary for magnetic attraction, which will be described later, between the magnetic chuck surface 10 and the lower surface 8 in a state of being installed on the magnetic chuck surface 10 via the lower end portion 7 of the base portion 2. A gap δ is formed. A handle 17 used for removal from the magnetic clamping device is attached to the upper surface 1b of the plate member 1a.

変位部４の下面８は、例えば、板部材１ａの底面を切削することにより平面状に設けられる。ここで言う「平面」には、完全な平面のほか、実質的に平面と見なすことが可能なものとして、曲率の大きい凹面あるいは凸面、段差面などで設けられるものを含む。 The lower surface 8 of the displacement part 4 is provided in a planar shape by, for example, cutting the bottom surface of the plate member 1a. As used herein, the term “plane” includes not only a complete plane but also a plane having a large curvature, such as a concave surface, a convex surface, or a step surface, which can be regarded as a substantially flat surface.

そして、この実施例では、変位部４の上面１ｃにおいて、幅方向に連続される溝１８を、下面８が上記高く設けられる領域の一部に形成している。溝１８の底面１８ａと下面８との間の距離すなわち肉厚ｔ１は、後述される磁気的吸引力を受けたときにこれより先端側の変位部４が容易に変位するように、また磁気的吸引力が解消されたときには変位部４が元の位置に復元されるように、適切な肉厚に設けられており、溝１８が設けられる領域に、実質的な弾性変形部３を構成する。 In this embodiment, on the upper surface 1c of the displacement portion 4, a groove 18 that is continuous in the width direction is formed in a part of the region where the lower surface 8 is provided higher. The distance between the bottom surface 18a and the bottom surface 8 of the groove 18, that is, the wall thickness t1, is set so that the displacement portion 4 on the front end side is easily displaced when receiving a magnetic attraction force described later. When the suction force is eliminated, the displacement portion 4 is provided with an appropriate thickness so that the displacement portion 4 is restored to the original position, and the substantial elastic deformation portion 3 is configured in a region where the groove 18 is provided.

また、この例での溝１８は、角形溝に限らず、断面弧状の溝（丸溝）、皿状の溝として、あるいは変位部４の上面１ｃに限らず、下面８側に形成することもできる。またこのような溝１８によって弾性変形部３を設けるに代え、後述する図５のように、変位部４の肉厚ｔ２を全体的にわたって弾性変形可能な肉厚に設けることにより、変形部４と重複する弾性変形部３を設けてもよい。 Further, the groove 18 in this example is not limited to a square groove, but may be formed on the lower surface 8 side as a groove having a cross-sectional arc shape (round groove), a dish-shaped groove, or not limited to the upper surface 1c of the displacement portion 4. it can. Further, instead of providing the elastic deformation portion 3 by such a groove 18, by providing the thickness t2 of the displacement portion 4 to a thickness that can be elastically deformed as a whole as shown in FIG. You may provide the elastic deformation part 3 which overlaps.

また、当接片５は、変位部４の先端位置に、変位部４の上面より高い位置に突出して、加工物１５の側部に対して当接可能な長さに延在しかつ弾性変形可能な肉厚ｔ５を有する板材で構成される。そのような当接片５は、変位部４の端面４ａに対し幅方向に間隔をおいて配置される複数の取付ボルト１９によって取付けられる。磁力発生時に、変位部４が磁気チャック面１０の磁気的吸引力によって変位する際に、当接片５は、変位部４の上面１ｃに対応する高さ位置から加工物１５への当接点Ｄまでの高さ方向の領域Ｆ１にわたって弾性変形可能に設けられる（図２参照）。この例で当接片５は、例えば金属板などで構成される単一の板部材で構成されており、変位部４の上面１ｃよりも高い位置において、加工物１５の側面に対向される当接面１６を介して当接する。 Further, the contact piece 5 protrudes to a position higher than the upper surface of the displacement portion 4 at the tip position of the displacement portion 4, extends to a length capable of contacting the side portion of the workpiece 15, and is elastically deformed. It is comprised with the board | plate material which has the possible thickness t5. Such a contact piece 5 is attached to the end surface 4a of the displacement portion 4 by a plurality of attachment bolts 19 arranged at intervals in the width direction. When the displacement portion 4 is displaced by the magnetic attraction force of the magnetic chuck surface 10 when the magnetic force is generated, the contact piece 5 contacts the workpiece 15 from a height position corresponding to the upper surface 1c of the displacement portion 4. It is provided to be elastically deformable over a region F1 in the height direction up to (see FIG. 2). In this example, the contact piece 5 is made of a single plate member made of, for example, a metal plate or the like, and is opposed to the side surface of the workpiece 15 at a position higher than the upper surface 1c of the displacement portion 4. It abuts via the contact surface 16.

当接片５の当接面１６は、変位部４の上面１ｃよりも高い位置において、磁気チャック面１０に対する垂直線ｕに対し加工物１５側にわずかに傾斜するように変位部４の先端に取付られており、このような傾斜は、当接片５の取付面５ａ、あるいは変位部４の先端面４ａのうちいずれかが傾斜面として形成されることにより実現可能である（図３参照）。 The contact surface 16 of the contact piece 5 is at the tip of the displacement portion 4 so as to be slightly inclined toward the workpiece 15 with respect to the vertical line u with respect to the magnetic chuck surface 10 at a position higher than the upper surface 1c of the displacement portion 4. Such inclination is realized by forming either the attachment surface 5a of the contact piece 5 or the tip surface 4a of the displacement portion 4 as an inclined surface (see FIG. 3). .

当接片５と板部材１ａとの弾性（変形度合い）について、板部材１ａ側に剛性を持たせ、当接片５の方が板部材１ａよりも変形しやすいように設けるほうがより好適である。これは、磁気チャック面１０での磁力発生時には、変位部４よりも当接片５に歪みを生じさせることによって加工物１５への押圧力を大きくすることができ、しかも押圧力を加工物１５に近い位置で発生させることで確実にクランプさせるためである。当接片５の材料について、磁性体材料、非磁性体材料のいずれかを問わず、金属板などの板材で構成することができる。例えば、当接片５と板部材１ａとが同じ磁性体材料である場合には、板部材１ａの肉厚ｔ０よりも当接片５の肉厚ｔ５を薄くすることで、板部材１ａ側(言い換えれば変位部４側)の相対的な剛性を高めることで、当接片５が加工物１５に当接した状態を維持しつつ弾性変形しやすいようにする。 With respect to the elasticity (degree of deformation) between the contact piece 5 and the plate member 1a, it is more preferable that the plate member 1a is provided with rigidity so that the contact piece 5 is more easily deformed than the plate member 1a. . This is because when the magnetic force is generated on the magnetic chuck surface 10, the pressing force to the workpiece 15 can be increased by causing the contact piece 5 to be distorted rather than the displacement portion 4. It is for making it clamp reliably by generating at the position near. About the material of the contact piece 5, it can comprise with board | plate materials, such as a metal plate, regardless of any of a magnetic material and a nonmagnetic material. For example, when the contact piece 5 and the plate member 1a are made of the same magnetic material, the thickness t5 of the contact piece 5 is made thinner than the thickness t0 of the plate member 1a, so that the plate member 1a side ( In other words, by increasing the relative rigidity of the displacement portion 4 side), the contact piece 5 is easily elastically deformed while maintaining the state of contact with the workpiece 15.

当接片５には、必要に応じて、上端から高さ方向下方に向けて連続されるスリット２０が、幅方向に間隔をおいて複数形成される。図３のｂには、当接片５を当接面１６側より見た図を示すが、これらのスリット２０は、当接片５を積極的に弾性変形し易くするとともに、加工物１５への片当たりを無くし、幅方向全体にわたって均一に把持できるようにするためである。このスリット２０は、以下のすべての実施例においても必要に応じて設けられる。なお、当接片５について、１枚の板部材に複数のスリット２０を設ける代わりに、細幅の板部材を、幅方向に間隔をおいて複数並び設けるようにしてもよい。 If necessary, a plurality of slits 20 that are continuous from the upper end downward in the height direction are formed in the contact piece 5 at intervals in the width direction. FIG. 3 b shows a view of the contact piece 5 as viewed from the contact surface 16 side, and these slits 20 make the contact piece 5 positively elastically deformed easily, and to the workpiece 15. This is to eliminate the contact of each piece and to allow uniform gripping over the entire width direction. The slit 20 is provided as necessary in all the following embodiments. For the contact piece 5, instead of providing a plurality of slits 20 in one plate member, a plurality of narrow plate members may be provided side by side in the width direction.

上記したクランプ工具１は、次のようにして用いられる。まず、磁気チャック面１０の所定の位置に非磁性材料の加工物１５が載置される。ここで、クランプ工具１の当接片５が加工物１５に当接するように、クランプ工具１を磁気チャック面１０の上に載置する。クランプ工具１は、図１のように、同じものを左右一対として準備し、加工物１５を左右から挟み込むように載置される。 The clamp tool 1 described above is used as follows. First, a workpiece 15 made of a nonmagnetic material is placed at a predetermined position on the magnetic chuck surface 10. Here, the clamp tool 1 is placed on the magnetic chuck surface 10 so that the contact piece 5 of the clamp tool 1 contacts the workpiece 15. As shown in FIG. 1, the clamping tool 1 is prepared so that the same tool is prepared as a pair of left and right, and the workpiece 15 is sandwiched from the left and right.

上記したクランプ工具１の作用について、以下図４を用いて具体的に説明する。図４は、クランプ工具１の要部拡大図であり、磁力発生の前後の状態を、一点鎖線および実線とでそれぞれ示す。クランプ工具１は、加工物１５の側面に当接するように載置された状態では、一点鎖線で示すように、変位部４の下面８と磁気チャック面１０との間に隙間δを有している。 The operation of the clamping tool 1 described above will be specifically described below with reference to FIG. FIG. 4 is an enlarged view of a main part of the clamp tool 1, and shows a state before and after the magnetic force is generated by a one-dot chain line and a solid line. When the clamp tool 1 is placed so as to contact the side surface of the workpiece 15, a gap δ is provided between the lower surface 8 of the displacement portion 4 and the magnetic chuck surface 10 as indicated by a dashed line. Yes.

そして、磁気チャック面１０側より磁力を発生させると、ベース部２の下端部７が磁気チャック面１０に対して押圧力Ｇが働いて圧着され、ベース部２の底面６と磁気チャック面１０との間に摩擦力が生じるため、ベース部２は、その摩擦力によって磁気チャック面１０に移動不能な状態として固定される。 When a magnetic force is generated from the magnetic chuck surface 10 side, the lower end portion 7 of the base portion 2 is pressed against the magnetic chuck surface 10 by pressing force G, and the bottom surface 6 of the base portion 2 and the magnetic chuck surface 10 Therefore, the base portion 2 is fixed to the magnetic chuck surface 10 so as not to move due to the friction force.

一方、磁気的な吸引力は、隙間δを隔てた変位部４の下端部９全体にも働く。この結果、作用力Ｈが働いて、変位部４およびこれと一体の当接片５は、溝１８が設けられる領域（弾性変形部３）の薄肉部１２に歪みを生じさせながら、ベース部２の先端側を中心に、変位部４の先端Ｙが磁気チャック面１０に当接する位置Ｙ’まで（図示反時計方向に）変位する。この結果、薄肉部１２を構成する領域の溝１８の底面１８ａおよび下面８は、先端側に向けて全体的に上に凸の湾曲変形した状態にされ、弾性変形状態にある。したがって、変位部４には、ベース部２と当接片５が取付けられる取付部との間の領域に、磁力発生状態における磁気チャック面１０からの吸引力を受けて弾性変形可能な肉厚の弾性変形部３が設けられる。このため変位部４は、その一部により弾性変形部３を兼用していることになる。 On the other hand, the magnetic attractive force acts on the entire lower end portion 9 of the displacement portion 4 across the gap δ. As a result, the acting force H works, and the displacement portion 4 and the contact piece 5 integrated therewith cause the thin portion 12 in the region where the groove 18 is provided (elastically deforming portion 3) to be distorted while the base portion 2 The tip Y of the displacement portion 4 is displaced to a position Y ′ where it contacts the magnetic chuck surface 10 (counterclockwise in the figure). As a result, the bottom surface 18a and the lower surface 8 of the groove 18 in the region constituting the thin portion 12 are brought into a curved and deformed state that is convex upward toward the distal end side, and is in an elastically deformed state. Therefore, the displacement portion 4 has a thickness that can be elastically deformed by receiving an attractive force from the magnetic chuck surface 10 in a magnetic force generation state in a region between the base portion 2 and the attachment portion to which the contact piece 5 is attached. An elastic deformation portion 3 is provided. For this reason, the displacement part 4 also serves as the elastic deformation part 3 by a part thereof.

上記ベース部２の先端位置２ｂを中心とする変位部４の円弧状軌跡の変位により、これと一体の当接片５も同様に円弧状の軌跡を描きながら変位する。当接片５の当接点Ｄでは、図４に示すように、矢印Ｈ’の方向に押圧力を作用させ、この結果当接片の側面１５ａに対して直交する方向に働く分力Ｂ(すなわちクランプ力)を作用させる。しかし、実際には、当接片５は、加工物１５の側面に既に当接しているため、当接片５は、上面１ｃよりも上方に突出する領域で歪みを生じさせながら、当接点Ｄにおける加工物１５に対する押圧力を徐々に増大させる。つまり、当接片５の側面には、変位部４の円弧状軌跡の変位によって当接片５の歪みによる反力がクランプ力として働く。当接片５が弾性変形可能であるから、変位部４の変位過程で、当接片５は、弾性変形しながら加工物１５の側面への当接位置を位置Ｄから位置Ｄ’に移動させながら変位部４の変位を許容するとともに、当接片５の歪みを増しながら(言い換えれば加工物１５へのクランプ力を高めながら)、変位部４の先端側の下面８は、磁気チャック面１０に当接する。最終的に加工物１５の側面１５ａに働く押圧力は、当接片５の歪み量に対応する反力ｃ’となる。 Due to the displacement of the arc-shaped locus of the displacement portion 4 centering on the tip position 2b of the base portion 2, the contact piece 5 integrated therewith is similarly displaced while drawing the arc-shaped locus. At the contact point D of the contact piece 5, as shown in FIG. 4, a pressing force is applied in the direction of the arrow H ′, and as a result, the component force B (that is, the force B acting in the direction orthogonal to the side surface 15 a of the contact piece) Clamping force) is applied. However, in actuality, since the contact piece 5 is already in contact with the side surface of the workpiece 15, the contact piece 5 is distorted in a region protruding upward from the upper surface 1c, while the contact point D. The pressing force on the workpiece 15 is gradually increased. That is, on the side surface of the contact piece 5, the reaction force due to the distortion of the contact piece 5 acts as a clamping force due to the displacement of the arcuate locus of the displacement portion 4. Since the contact piece 5 can be elastically deformed, the contact piece 5 moves the contact position on the side surface of the workpiece 15 from the position D to the position D ′ while being elastically deformed in the displacement process of the displacement portion 4. While allowing the displacement of the displacement portion 4 and increasing the distortion of the contact piece 5 (in other words, increasing the clamping force to the workpiece 15), the lower surface 8 on the distal end side of the displacement portion 4 has a magnetic chuck surface 10. Abut. The pressing force that finally acts on the side surface 15 a of the workpiece 15 becomes a reaction force c ′ corresponding to the amount of distortion of the contact piece 5.

変位部４の先端側の下面８と磁気チャック面１０との隙間が狭くなるにつれて、変位部４に働く磁気的な吸引力は著しく増大するが、当接片５の弾性変形によって、加工物１５への当接点に働く力は、適切に抑えられるため、加工物１５を傷つけるようなこともない。 As the gap between the lower surface 8 on the distal end side of the displacement portion 4 and the magnetic chuck surface 10 becomes narrower, the magnetic attractive force acting on the displacement portion 4 increases remarkably, but due to the elastic deformation of the contact piece 5, the workpiece 15 Since the force acting on the contact point is appropriately suppressed, the workpiece 15 is not damaged.

このように、当接片５が弾性変形可能（撓み変形可能）であるため、磁力発生時に変位部４の下面８が磁気チャック面１０に確実に接近する。一方、変位部４が磁気チャック面１０に近づくほど、変位部４に磁気的吸引力が著しく増大し、この結果当接片５にも大きな力が加わることになるが、当接片５が弾性変形するため、加工物１５への押圧力は、変位部４に働く磁気的吸引力よりも抑えられ、適切な大きさの力で押圧できる。よって、過剰な力で押圧把持することもなく、加工物１５を変形させたり傷つけるような不都合が発生しない。 Thus, since the contact piece 5 is elastically deformable (can be flexibly deformed), the lower surface 8 of the displacement portion 4 reliably approaches the magnetic chuck surface 10 when a magnetic force is generated. On the other hand, the closer the displacement part 4 is to the magnetic chuck surface 10, the greater the magnetic attraction force on the displacement part 4. As a result, a larger force is applied to the contact piece 5. Due to the deformation, the pressing force to the workpiece 15 is suppressed more than the magnetic attractive force acting on the displacement portion 4 and can be pressed with an appropriate magnitude of force. Therefore, there is no inconvenience that the workpiece 15 is deformed or damaged without being pressed and held with excessive force.

当接片５は、変位部４の上面１ｃより突出するように設けられるため、加工物１５を高い位置で、言い換えれば切削点などの加工位置に近い位置で、押圧（挟持）することができるから、非磁性材料の加工物１５を確実に保持できる。 Since the contact piece 5 is provided so as to protrude from the upper surface 1c of the displacement portion 4, the workpiece 15 can be pressed (held) at a high position, in other words, at a position close to the processing position such as a cutting point. Therefore, it is possible to securely hold the workpiece 15 of the nonmagnetic material.

非磁性体材料の加工物１５の両側面に当接するように、対となるクランプ工具１を両側に配置し、磁気チャック面１０からの磁力の発生によって、磁性体材料で設けられる変位部４の変位を、当接片５の歪みにともなう反力に変換し、加工物１５の両側よりクランプ力を作用させることができる。このようなクランプ動作は、磁力が発生されると、クランプ工具は直ちに変位し、加工物１５のクランプ把持が瞬時に完了されることは言うまでもない。 A pair of clamping tools 1 are arranged on both sides so as to abut on both side surfaces of the workpiece 15 made of non-magnetic material, and by the generation of magnetic force from the magnetic chuck surface 10, the displacement portion 4 provided with the magnetic material is formed. The displacement can be converted into a reaction force accompanying the distortion of the contact piece 5, and a clamping force can be applied from both sides of the workpiece 15. In such a clamping operation, it is needless to say that when a magnetic force is generated, the clamping tool is immediately displaced, and clamping of the workpiece 15 is instantaneously completed.

従って、従来のような重量の大きい厚肉のクランプ工具１を使わずに済むため、作業者の負担が軽減される。当接片５は、ベース部２またはベース部２と一体の部材に設けられる部材に対して取り外し可能とすることによって、加工物１５の大きさ（高さ寸法、幅寸法）、硬度などに応じて弾性の異なるものを取り替えて用いることができる。加工物１５に対応する当接片５を複数用意すれば良く、管理もし易い。 Therefore, it is not necessary to use a thick clamping tool 1 having a large weight as in the prior art, and the burden on the operator is reduced. The contact piece 5 is detachable from the base part 2 or a member provided on the member integral with the base part 2, thereby depending on the size (height dimension, width dimension), hardness, etc. of the workpiece 15. Can be used with different elasticity. A plurality of contact pieces 5 corresponding to the workpiece 15 may be prepared, and management is easy.

ちなみに、非磁性体加工物のクランプ工具１の具体的な構成（材料、 肉厚、 長さ、 隙間）などは、下記の通りである。まず、ベース部２、変位部４を構成する板部材の材料は、外部からの磁力によって、強い磁気的吸引力の働く磁性材料であって、残留磁気が小さく、自らが永久磁化されない磁性体材料であればよく、例えば、ＪＩＳ記号ＳＳ４００など、純度の高い鉄、炭素含有量が低い軟鉄のほか、変圧器の鉄芯の材料であるケイ素鋼板などの金属材料とする。なお、Ｓ５５Ｃのような炭素鋼は、残留磁気が大きく、仮に磁気チャック面１０側を非磁力発生状態にしたとしても、板部材の磁化（残留磁気）によって磁気的な吸引力が依然として働いたままであるため、クランプ工具の着脱に支障をきたしたり、変形しにくい材料であることから、好適な材料ではない。 Incidentally, the specific configuration (material, thickness, length, gap) of the clamping tool 1 for a non-magnetic workpiece is as follows. First, the material of the plate member constituting the base portion 2 and the displacement portion 4 is a magnetic material that exerts a strong magnetic attraction force by an external magnetic force, has a small residual magnetism, and does not become permanent magnetized. For example, in addition to high-purity iron such as JIS symbol SS400, soft iron having a low carbon content, a metal material such as a silicon steel plate which is a material of an iron core of a transformer is used. Note that carbon steel such as S55C has a large residual magnetism, and even if the magnetic chuck surface 10 side is brought into a non-magnetic force generation state, the magnetic attraction force still works due to the magnetization (residual magnetism) of the plate member. For this reason, it is not a suitable material because it is a material that hinders the attachment / detachment of the clamp tool or is difficult to deform.

より具体的には、板部材１ａの厚みｔ０は、１０ｍｍ以上の弾性変形可能な肉厚を有すればよく、例えば１５ｍｍとし、溝１８と下面８とで画定される薄肉部１２の厚みｔ１は、磁気作用時に塑性変形にならない肉厚であればよく、例えば１０ｍｍとする。あるクランプ工具１の構成例としては、板部材（ベース部２、弾性変形部３および変位部４）の幅・長さは、それぞれ１５０ｍｍ・９０ｍｍとする。このときベース部２の長さは８０ｍｍで、変位部４の長さは７０ｍｍである。 More specifically, the thickness t0 of the plate member 1a only needs to have an elastically deformable thickness of 10 mm or more. For example, the thickness t1 of the thin portion 12 defined by the groove 18 and the lower surface 8 is 15 mm. The thickness may be any thickness as long as it does not cause plastic deformation during magnetic action, for example, 10 mm. As a configuration example of a certain clamping tool 1, the width and length of the plate member (base portion 2, elastic deformation portion 3 and displacement portion 4) are 150 mm and 90 mm, respectively. At this time, the length of the base portion 2 is 80 mm, and the length of the displacement portion 4 is 70 mm.

つぎに、当接片５は、磁性材料、非磁性材料を問わず、適度な弾性を有し、構造的に強い材料であればいずれも採用可能だが、例えば、ＪＩＳ記号Ｓ５５Ｃなどの機械構造用炭素鋼鋼材により構成する。その厚みは、５ｍｍ以上の変形可能な肉厚を有すればよく、例えば６ｍｍとし、幅・長さは、それぞれ６０ｍｍ・９０ｍｍとする。ベース部２、弾性変形部３および変位部４の具体的な寸法は、いずれも加工物１５の大きさや、材料の堅さ（弾性係数）を考慮して決定する。また、当接片５にその頭部が埋め込まれる取付ボルト１９は、極低頭の穴付ボルトを採用すればよい。 Next, the contact piece 5 may be any material that has moderate elasticity and is structurally strong regardless of whether it is a magnetic material or a non-magnetic material. For example, for the mechanical structure such as JIS symbol S55C. It is made of carbon steel. The thickness only needs to have a deformable thickness of 5 mm or more. For example, the thickness is 6 mm, and the width and length are 60 mm and 90 mm, respectively. Specific dimensions of the base portion 2, the elastic deformation portion 3, and the displacement portion 4 are all determined in consideration of the size of the workpiece 15 and the hardness (elastic coefficient) of the material. Moreover, what is necessary is just to employ | adopt the bolt with a very low head as the attachment bolt 19 by which the head is embedded at the contact piece 5. FIG.

変位部４の下面８と磁気チャック面１０との隙間δは、加工物１５の大きさにもよるが、好適な範囲としては、１０分の数ｍｍ程度とする。また、当接片５（当接面１６）と磁気チャック面１０とのなす角度は、好適な範囲として９０°近傍の鈍角１００°〜９０°程度とし（言い換えれば、図３のａの角度αは、１０°〜０°とし）、その角度を設けるための具体的な手法は問わない。具体的な手法としては、図１〜図３の例のように、当接片５または変位部４の端面のいずれか一方をテーパ状に形成するか、または当接片５を取付ける際にシムを挟むようにしてもよい。 The gap δ between the lower surface 8 of the displacement part 4 and the magnetic chuck surface 10 is about several tenths of a millimeter as a suitable range, although it depends on the size of the workpiece 15. Further, the angle formed between the contact piece 5 (contact surface 16) and the magnetic chuck surface 10 is preferably an obtuse angle of about 100 ° to 90 ° in the vicinity of 90 ° (in other words, the angle α in FIG. 3A). Is 10 ° to 0 °), and a specific method for providing the angle is not limited. As a specific method, as in the example of FIGS. 1 to 3, either the contact piece 5 or the end surface of the displacement portion 4 is formed in a tapered shape, or a shim is attached when the contact piece 5 is attached. May be sandwiched.

この実施例１では、加工物１５の左右両側に本発明のクランプ工具１を配置する例であるが、いずれか一方を従来のブロックに置き換えてもよい。例えば、そのようなブロックは、クランプ工具１の材料と同じ、磁性体材料として構成し、磁力の発生によって、磁気チャック面に吸着されるもので構成してもよい。あるいは、例えば非磁性体材料を材料とし、磁気チャック面上にねじ部材を介して移動不能に固定されたブロックとすることもできる。 In the first embodiment, the clamp tool 1 of the present invention is arranged on both the left and right sides of the workpiece 15, but either one may be replaced with a conventional block. For example, such a block may be configured as the same magnetic material as the material of the clamp tool 1 and may be configured to be attracted to the magnetic chuck surface by generation of magnetic force. Alternatively, for example, a non-magnetic material may be used as a material, and the block may be fixed on the magnetic chuck surface through a screw member so as to be immovable.

［実施例１の変形例１（図５）］
上記した実施例は、変位部４が設けられる領域の一部に、幅方向に連続される角形の溝１８を設ける例であるが、板部材１ａの弾性を適切に設定することで、溝１８を省略することができる。図５に示す実施例１の変形例１は、溝１８が省略されたクランプ工具の例であり、板部材１ａが磁性体材料で設けられる点、変位部４の下端部９との間に隙間δが設けられる点等、上記実施例と同じである。この実施例では、変位部４の肉厚ｔ２が、弾性変形可能な肉厚に設けられている。磁気チャック面１０からの磁力発生前後のクランプ工具の状態を、図５において一点鎖線および実線により示している。この実施例では、磁力発生にともなう変位部４の下端部の変位によって、板部材１ａが先端位置を含む一部の領域で磁気チャック面１０に当接して図示当接領域を構成するとともに、それより基端側の領域が、上面１ｃおよび下面９が下に凸の湾曲変形した状態で静止されている。すなわち、このような湾曲される領域が実質的に弾性変形部３として機能しており、変位部４に対して重複され、しかも上記した実施例１に対してより長い区間にわたって弾性変形部３が設けられる例でもある。 [Modification 1 of Embodiment 1 (FIG. 5)]
The above-described embodiment is an example in which a square groove 18 that is continuous in the width direction is provided in a part of a region where the displacement portion 4 is provided. However, by appropriately setting the elasticity of the plate member 1a, the groove 18 is provided. Can be omitted. Modification 1 of Example 1 shown in FIG. 5 is an example of a clamping tool in which the groove 18 is omitted, and a gap is provided between the plate member 1a and a lower end portion 9 of the displacement portion 4 provided with a magnetic material. This is the same as the above embodiment in that δ is provided. In this embodiment, the thickness t2 of the displacement portion 4 is provided so as to be elastically deformable. The state of the clamping tool before and after the generation of the magnetic force from the magnetic chuck surface 10 is indicated by a one-dot chain line and a solid line in FIG. In this embodiment, due to the displacement of the lower end portion of the displacement portion 4 accompanying the generation of magnetic force, the plate member 1a abuts against the magnetic chuck surface 10 in a partial region including the tip position, thereby forming the illustrated contact region. The region on the more proximal side is stationary with the upper surface 1c and the lower surface 9 being curved and deformed downward. That is, such a curved region substantially functions as the elastic deformation portion 3, overlaps with the displacement portion 4, and the elastic deformation portion 3 extends over a longer section than the first embodiment. It is also an example provided.

〔実施例１の変形例２（図６および図７）〕
図６および図７は、実施例１の変形例による非磁性体加工物のクランプ工具１を示している。 [Modification 2 of Embodiment 1 (FIGS. 6 and 7)]
6 and 7 show a clamping tool 1 for a non-magnetic workpiece according to a modification of the first embodiment.

まず、図６の変形例は、クランプ工具１を複数の部材で構成する際の具体的な例である。うち、図６のａからｃは、上記した実施例の板部材１ａを、複数の部材を連結して一体に設ける例であり、後述する図６のｄは、当接片５および変位部４の部分を単一部材で構成した例である。図６のａは、ベース部２を有するベース部材４２と、変位部４を有しベース部材４２に比べて薄い肉厚に設けられる変位部材４４とを設けるとともに、両者の間に連結部材４６を介在させ連結させる例であり、より詳しくは、連結部材４６は、変位部４ならびにベース部２よりも薄肉の連結部材２１を有するとともに、前記連結部材２１の両端部に設けられた取付部２２、２３で、取付ボルト２４、２５によりベース部材４２、変位部材４４の各端部を固着して一体に設ける例である。 First, the modification of FIG. 6 is a specific example when the clamp tool 1 is composed of a plurality of members. Among these, a to c in FIG. 6 are examples in which the plate member 1a of the above-described embodiment is integrally provided by connecting a plurality of members, and d in FIG. 6 to be described later is the contact piece 5 and the displacement portion 4. It is an example which comprised this part by the single member. 6A, a base member 42 having the base portion 2 and a displacement member 44 having the displacement portion 4 and having a smaller thickness than the base member 42 are provided, and a connecting member 46 is provided therebetween. More specifically, the connecting member 46 includes the connecting member 21 that is thinner than the displacement portion 4 and the base portion 2, and mounting portions 22 provided at both ends of the connecting member 21. 23, the end portions of the base member 42 and the displacement member 44 are fixedly provided integrally with the mounting bolts 24 and 25.

この例によると、連結部材４６に設けた薄肉の連結部材２１が、実質的に弾性変形部３として機能し、またベース部材４２とほぼ同じ肉厚に設けられた取付部２２とベース部材４２とは、上記固着によって、実質的にベース部２として機能する。また連結部材４６および変位部材４４の下面と、磁気チャック面１０との間には、隙間δが設けられていて、変位部材４４の下端部９が、磁気的な吸引力によって変位可能にされている。なお、連結部材２１は、変位部４と同じ材料またはその弾性特性に近い材料により構成することもできるし、これよりも弾性変形しやすい材料（非磁力発生状態において変位部４をもとの位置に復帰させる復元力が得られる材料）であればよい。また、この実施例における連結部材２１は、非磁性体材料で構成することも可能である。仮に弾性変形部３の疲労により破損したとしても、連結部材２１のみを交換すればよく、メンテナンス性の面で有利である。 According to this example, the thin connecting member 21 provided on the connecting member 46 functions substantially as the elastically deformable portion 3, and the mounting portion 22 and the base member 42 provided with substantially the same thickness as the base member 42. Substantially functions as the base portion 2 by the fixing. Further, a gap δ is provided between the lower surface of the connecting member 46 and the displacement member 44 and the magnetic chuck surface 10, and the lower end portion 9 of the displacement member 44 can be displaced by a magnetic attraction force. Yes. The connecting member 21 can be made of the same material as the displacement portion 4 or a material close to its elastic characteristics, or a material that is more easily elastically deformed than this (in a non-magnetic force generation state, the displacement portion 4 is located at the original position). Any material can be used as long as it has a restoring force to return to (1). Further, the connecting member 21 in this embodiment can also be made of a nonmagnetic material. Even if the elastic deformation portion 3 is damaged due to fatigue, only the connecting member 21 needs to be replaced, which is advantageous in terms of maintenance.

図６のｂは、図６のａにおける変位部材４４と連結部材４６とを、単一の板部材５０で設ける例である。より詳しくは、側面から見て凹型のベース部材４８と、弾性変形部３、変位部４、および取付部２２を有する部材５０で構成するとともに、部材５０の取付部２２が、凹型のベース部２の内側から挿入される取付ボルト２６により、ベース部材４８に一体に取付けた例である。この例でも、必要に応じて変形を促すための溝１８が形成され、画定される薄肉部１２がベース部２寄りに設けられている。なお、部材４８および部材５０はいずれも磁性体材料で設けられる。 FIG. 6B is an example in which the displacement member 44 and the connecting member 46 in FIG. 6A are provided by a single plate member 50. More specifically, it is constituted by a base member 48 having a concave shape when viewed from the side, and a member 50 having an elastic deformation portion 3, a displacement portion 4, and a mounting portion 22, and the mounting portion 22 of the member 50 is a concave base portion 2. This is an example of being integrally attached to the base member 48 by the mounting bolts 26 inserted from the inside. Also in this example, a groove 18 for urging deformation is formed as necessary, and the thin portion 12 to be defined is provided closer to the base portion 2. The member 48 and the member 50 are both made of a magnetic material.

上記の変形例では、溝１８は、既述の通り、上面側に設ける代わりに、下面側に設けてもよく、さらには双方に設けることもできる。特に、下面に溝１８を設ける場合、変位部４の先端が当接する前に、支点に遠い方の溝１８の側部と下面との角部が、磁気チャック面１０に先に当たることが考えられ、これにより変位部４の先端側が接近する力が減殺され、当接片５の変位量が抑えられることがある。好ましくは、角部が先に磁気チャック面１０に当たらない方がよいから、具体的には先端側下面の高さ位置が先端側に向けて低くなるように（言い換えれば、先端側に向けて開口されるテーパ状の）隙間を設ける。また、幅方向に延びる溝１８の代わりに、肉厚方向に貫通される貫通孔（丸穴）を幅方向に間隔をおいて複数設けたり、あるいは幅方向に貫通される貫通孔（丸穴）を板部材の延在方向に間隔をおいて複数設け、弾性変形しやすくすることも考えられる。これらの事項は、図１〜図６の実施例に限らず、すべての実施例においても言えることである。 In the above modification, as described above, the groove 18 may be provided on the lower surface side instead of being provided on the upper surface side, and may be provided on both sides. In particular, when the groove 18 is provided on the lower surface, it is considered that the corner portion between the side portion and the lower surface of the groove 18 far from the fulcrum hits the magnetic chuck surface 10 before the tip of the displacement portion 4 comes into contact. As a result, the force by which the distal end side of the displacement portion 4 approaches is reduced, and the displacement amount of the contact piece 5 may be suppressed. Preferably, since it is better that the corner portion does not hit the magnetic chuck surface 10 first, specifically, the height position of the lower surface on the distal end side is lowered toward the distal end side (in other words, toward the distal end side). Provide an opening (tapered) gap. Further, instead of the groove 18 extending in the width direction, a plurality of through holes (round holes) penetrating in the thickness direction are provided at intervals in the width direction, or through holes (round holes) penetrating in the width direction. It is also conceivable to provide a plurality of plates with an interval in the extending direction of the plate member to facilitate elastic deformation. These matters can be said not only in the embodiments of FIGS. 1 to 6 but also in all the embodiments.

図６のｃは、図６のａに対し、ベース部材４２と連結部材４６とを、単一の板部材５２に設ける例である。より詳しくは、ベース部２を有する部材５２の一端側に、先端側に向けて側面から見てＬ型に延びる連結部材２１を部材５２と単一に形成する。さらに、変位部４を、連結部材２１の先端側に設けられた取付部２３の内側より取付ボルト２５により固着し、一体に取付けた例である。ここでは、ベース部２に比べて薄肉に設けられる連結部材２１およびその両側の取付部とで、角溝のような空間が形成され、実質的な弾性変形部３を構成している。 FIG. 6C is an example in which a base member 42 and a connecting member 46 are provided on a single plate member 52 with respect to FIG. More specifically, a connecting member 21 that extends in an L shape when viewed from the side toward the distal end is formed integrally with the member 52 on one end side of the member 52 having the base portion 2. Furthermore, the displacement part 4 is an example in which the displacement part 4 is fixed by an attachment bolt 25 from the inside of the attachment part 23 provided on the distal end side of the connecting member 21 and attached integrally. Here, a space like a square groove is formed by the connecting member 21 provided thinner than the base portion 2 and the attachment portions on both sides thereof, thereby constituting a substantially elastic deformation portion 3.

図６のｄは、図６のａに対し、弾性変形部３を有しベース部材４２に対する取付部を有する部材４６と、変位部材４４と、さらに変位部４の先端側に位置する当接片５とを、単一部材５８によって設ける例である。当接片５は、変位部４に対しては着脱自在でないが、ベース部材４２に対し、弾性変形部３、変位部４および弾性変形部３が同時に着脱自在となる。この例によると、図６のａに比べて部品数が少なくなる点で有利となる。 6d is a member 46 having an elastically deformable portion 3 and a mounting portion with respect to the base member 42, a displacement member 44, and a contact piece located on the distal end side of the displacement portion 4 with respect to FIG. 5 is an example provided by a single member 58. The contact piece 5 is not detachable from the displacement portion 4, but the elastic deformation portion 3, the displacement portion 4, and the elastic deformation portion 3 are detachable from the base member 42 at the same time. This example is advantageous in that the number of parts is reduced as compared with FIG.

さらに、図７は、クランプ工具１には、加工物１５に対する当接片５を、板部材１ｄの延在方向の両側に設けることで、１つのクランプ工具と、複数の固定用ブロックとで、２個の加工物１５を同時に保持する例である。クランプ工具１について、より詳しくは、弓なり形状の板部材１ｄの凸部を下にして、中央部にベース部２を設けるとともに、その両側に変位部４を設け、両方の変位部４の先端側に当接片５を、変位部の上面１ｃよりも上方に突出するようにそれぞれ取付ける。ここで、板部材１ｄの両側にある、下端部９と磁気チャック面１０との間に隙間を有する部分が、変位部４、および磁気的な吸引力によって弾性変形可能な弾性変形部３として機能する。 Furthermore, FIG. 7 shows that the clamping tool 1 is provided with the contact pieces 5 against the workpiece 15 on both sides in the extending direction of the plate member 1d, so that one clamping tool and a plurality of fixing blocks are used. This is an example of holding two workpieces 15 simultaneously. More specifically, the clamping tool 1 is provided with a base portion 2 provided at the center portion and a displacement portion 4 provided on both sides thereof with the convex portion of the bow-shaped plate member 1d on the lower side. The abutment pieces 5 are respectively attached so as to protrude above the upper surface 1c of the displacement portion. Here, the part which has a clearance gap between the lower end part 9 and the magnetic chuck | zipper surface 10 in the both sides of the board member 1d functions as the displacement part 4 and the elastic deformation part 3 which can be elastically deformed by magnetic attraction force. To do.

図７の例では、磁性体材料に設けられる位置決め用のブロック２７が２個用いられる。より詳しくは、２個の加工物１５は、クランプ工具１の両側の対応する当接片５に、加工物１５の側面が当接するように磁気チャック面１０にそれぞれ配置される一方、各ブロック２７は、加工物１５の上記当接する側面とは反対側の側面に、対応するブロック２７の側面が当接するように、磁気チャック面１０にそれぞれ配置される。このようにして、所定位置に配置された２個の加工物１５は、両側でクランプ工具１の当接面１６と対応するブロック２７の側面とに当接した状態にある。 In the example of FIG. 7, two positioning blocks 27 provided on the magnetic material are used. More specifically, the two workpieces 15 are respectively arranged on the magnetic chuck surface 10 so that the side surfaces of the workpiece 15 abut against the corresponding abutting pieces 5 on both sides of the clamping tool 1, while each block 27 Are arranged on the magnetic chuck surface 10 so that the side surface of the corresponding block 27 is in contact with the side surface of the workpiece 15 opposite to the side surface on which the workpiece 15 contacts. In this way, the two workpieces 15 arranged at predetermined positions are in contact with the contact surface 16 of the clamping tool 1 and the corresponding side surface of the block 27 on both sides.

磁気チャック面１０に磁力が発生すると、浮き上がり状態にある両側の変位部４は、磁気チャック面１０に磁気的に吸着され、磁気チャック面１０に当接するように弾性変形する。この結果、双方の当接片５も図示しない支点を中心に円弧状の軌跡を描いて変位する結果、外側下方に向けて変位し、当接片５は歪みを増して両側の加工物１５を押圧する。一方で、ブロック２７は、磁気チャック面１０上に図示しないねじ部材を介して移動不能に固定されるか、あるいは磁性体材料で製作されることにより磁気チャック面１０に吸着して相対的移動不能にされるため、上記当接片５の歪みによって生じる反力を、加工物１５に当接する側面にそのまま作用させる。このように、押圧力を両側から作用させて、２個の加工物１５を保持することができる。なお１個の加工物１５のみを加工する場合、このクランプ工具１の片方にのみ加工物１５を配置すればよい。例えば、そのようなブロック２７は、クランプ工具１の材料と同じ、磁性体材料として構成し、磁力の発生によって、磁気チャック面１０に吸着されるもので構成してもよい。あるいは、例えば非磁性体材料を材料とし、磁気チャック面１０上にねじ部材を介して移動不能に固定されたブロックとすることもできる。 When a magnetic force is generated on the magnetic chuck surface 10, the displacement parts 4 on both sides in the lifted state are magnetically attracted to the magnetic chuck surface 10 and elastically deformed so as to contact the magnetic chuck surface 10. As a result, both abutting pieces 5 are also displaced by drawing an arcuate locus around a fulcrum (not shown). As a result, the abutting pieces 5 are displaced downward and the abutting pieces 5 are distorted to cause the workpieces 15 on both sides to move. Press. On the other hand, the block 27 is fixed on the magnetic chuck surface 10 through a screw member (not shown) so as not to move, or is made of a magnetic material so as to be attracted to the magnetic chuck surface 10 and cannot be relatively moved. Therefore, the reaction force generated by the distortion of the contact piece 5 is directly applied to the side surface in contact with the workpiece 15. In this way, it is possible to hold the two workpieces 15 by applying a pressing force from both sides. If only one workpiece 15 is to be machined, the workpiece 15 may be disposed only on one side of the clamping tool 1. For example, such a block 27 may be configured as the same magnetic material as the material of the clamping tool 1 and may be configured to be attracted to the magnetic chuck surface 10 by generation of magnetic force. Alternatively, for example, a non-magnetic material can be used as a material, and the block can be fixed on the magnetic chuck surface 10 through a screw member so as to be immovable.

〔実施例２（図８）〕
図８は、本発明に係る実施例２の非磁性体加工物のクランプ工具１を示している。この例において、クランプ工具１は、大まかに言えば、磁性体材料で設けられる肉厚ｔ０の板部材１ｅと、肉厚ｔ５の板状の当接片５、により構成されており、弾性変形部３は、弾性変形可能な材料、例えば肉厚０．５ｍｍ程度の板ゴムにより構成され、弾性変形部３としての板ゴムは、板部材１ｅの先端側近傍位置の下面８に下向きに突出するように貼付されている。当接片５の一端部は、板部材１ｅの先端に、板部材１ｅの先端に設けられたＬ形の仕口（例えば、包み打ち突付け）ならびに挿入される取付ボルト１９等を介し、固着されていて、当接片５は、板部材１ｅの上面１ｃよりも突出するように設けられる。 [Example 2 (FIG. 8)]
FIG. 8 shows a clamping tool 1 for a non-magnetic workpiece according to a second embodiment of the present invention. In this example, the clamping tool 1 is roughly composed of a plate member 1e having a wall thickness t0 and a plate-shaped contact piece 5 having a wall thickness t5, which is made of a magnetic material. 3 is made of an elastically deformable material, for example, a sheet rubber having a thickness of about 0.5 mm, and the sheet rubber as the elastically deforming portion 3 protrudes downward on the lower surface 8 near the front end side of the plate member 1e. It is affixed to. One end of the abutting piece 5 is fixed to the tip of the plate member 1e via an L-shaped joint (for example, wrapping hitting) provided at the tip of the plate member 1e and a mounting bolt 19 to be inserted. The contact piece 5 is provided so as to protrude from the upper surface 1c of the plate member 1e.

クランプ工具１が非磁力発生状態の磁気チャック面１０に設置された状態では、基端側の図示位置ｖで磁気チャック面１０に線接触して当接しており、先端側に位置する弾性変形部３としての板ゴムは、板部材１ｅの下面８と磁気チャック面１０との間に隙間δを形成する。 In a state where the clamp tool 1 is installed on the magnetic chuck surface 10 in a non-magnetic force generation state, the elastic deformation portion is located in contact with the magnetic chuck surface 10 in line contact with the magnetic chuck surface 10 at the illustrated position v on the base end side. The rubber plate 3 forms a gap δ between the lower surface 8 of the plate member 1 e and the magnetic chuck surface 10.

実施例１と同様に、クランプ工具１は、加工物１５の側面に当接片５を当てながら磁気チャック面１０に載置する。この載置状態のときに、クランプ工具１は、基端側では、板部材１ｅ図示位置ｖで磁気チャック面１０に線接触（当接）しており、また先端側では、弾性変形部３としての板ゴムが磁気チャック面１０に当接している。 Similar to the first embodiment, the clamp tool 1 is placed on the magnetic chuck surface 10 while the contact piece 5 is applied to the side surface of the workpiece 15. In this mounted state, the clamping tool 1 is in line contact (contact) with the magnetic chuck surface 10 at the position v illustrated in the drawing on the base member side on the proximal end side, and as the elastic deformation portion 3 on the distal end side. The rubber plate is in contact with the magnetic chuck surface 10.

そして、磁気チャック面１０側から磁力を発生させると、図９に示すように、板部材１ｅには、下端部全体に吸引力が働き、板ゴムで構成される弾性変形部３は圧縮変形し、板部材１ｅは、当接位置ｖを支点に磁気チャック面１０側に吸い寄せられる。板部材１ｅは、隙間が小さい領域ほどより大きな吸引力を受ける。また、板部材１ｅは、いくらか弾性を有しているため自らも歪みを生じ、磁気チャック面１０に当接する箇所が、図示するように図示位置ｖから図示位置ｗまでの領域に、よりも広がることになり、磁気チャック面１０への圧着にともなう摩擦力によって、クランプ工具１は、磁気チャック面１０に対して相対的移動不能にされる。一方で、また図示位置ｗより先端側の領域全体では、磁気チャック面１０側により接近して吸い寄せられる。つまりこの実施例では、板部材１ｅについて、磁力発生時における、磁気チャック面１０に圧着される図示位置ｖから図示位置ｗまでの領域が本願発明でいうベース部２として機能し、またこれよりも先端側の領域が実質的に変位部４として機能するのであり、言い換えれば、ベース部２および変位部４は、連続される単一の板部材１ｅにより構成されている。 When a magnetic force is generated from the magnetic chuck surface 10 side, as shown in FIG. 9, the plate member 1e has an attractive force acting on the entire lower end portion, and the elastic deformation portion 3 made of plate rubber is compressed and deformed. The plate member 1e is sucked toward the magnetic chuck surface 10 with the contact position v as a fulcrum. The plate member 1e receives a larger suction force as the gap is smaller. Further, since the plate member 1e has some elasticity, the plate member 1e itself is also distorted, and the portion that comes into contact with the magnetic chuck surface 10 spreads more than the region from the illustrated position v to the illustrated position w as illustrated. As a result, the clamping tool 1 is rendered immovable relative to the magnetic chuck surface 10 due to the frictional force accompanying the pressure bonding to the magnetic chuck surface 10. On the other hand, the entire region on the tip side from the illustrated position w is sucked closer to the magnetic chuck surface 10 side. That is, in this embodiment, for the plate member 1e, the region from the illustrated position v to the illustrated position w that is pressure-bonded to the magnetic chuck surface 10 when the magnetic force is generated functions as the base portion 2 referred to in the present invention. The region on the distal end side substantially functions as the displacement portion 4, in other words, the base portion 2 and the displacement portion 4 are configured by a single continuous plate member 1 e.

以下、実施例１と同様に、変位部４の変位にともない、当接片５が歪み変形して加工物１５を押圧する結果、クランプ工具１は、当接片５の当接面１６を加工物１５の側面にさらに押し当てる。また実施例１と同様に、加工物１５の反対側にもクランプ工具１が同様に配置されており、いずれのクランプ工具も、磁力の発生によって、同時に変位される結果、加工物１５を両側より同時に押圧し把持することができる。なお、板部材１ｅは、殆ど変形しない剛体であってもよいが、適度に弾性変形可能な材料であってもよい。 Hereinafter, as in the first embodiment, as a result of the displacement of the displacement portion 4, the contact piece 5 is distorted and presses the workpiece 15. As a result, the clamp tool 1 processes the contact surface 16 of the contact piece 5. Further press against the side of the object 15. Similarly to the first embodiment, the clamp tool 1 is similarly arranged on the opposite side of the workpiece 15, and both clamp tools are simultaneously displaced by the generation of magnetic force. As a result, the workpiece 15 is moved from both sides. It can be pressed and gripped at the same time. The plate member 1e may be a rigid body that hardly deforms, but may be a material that can be elastically deformed moderately.

〔実施例２の変形例（図１０）〕
図１０は、実施例２による非磁性体加工物のクランプ工具１で、特に弾性変形部３の変形例を示している。この例で、板部材１ｅの下面８の弾性変形部３が設けられる先端側位置には、埋め込み用の溝１４が幅方向に間隔をおいて複数設けられるとともに、複数の溝１４には、弾性変形部３として弾性体が、それぞれ溝１４の上底部に接した状態で下面８より下方に突出するように設けられる。弾性変形部３として弾性体は、ゴム板に限らず、例えば、弾性ウレタン、板ばね等のばねなど公知の部材で構成できる。 [Modification of Example 2 (FIG. 10)]
FIG. 10 shows a non-magnetic workpiece clamping tool 1 according to the second embodiment, in particular, a modification of the elastic deformation portion 3. In this example, a plurality of embedding grooves 14 are provided at intervals in the width direction at the front end side position where the elastic deformation portion 3 of the lower surface 8 of the plate member 1e is provided. An elastic body is provided as the deformable portion 3 so as to protrude downward from the lower surface 8 while being in contact with the upper bottom portion of the groove 14. The elastic body as the elastic deformable portion 3 is not limited to a rubber plate, and may be formed of a known member such as a spring such as elastic urethane or a leaf spring.

この変形例によると、磁気チャック面１０での磁力発生時には、下面８から突出しないように、弾性変形部３が圧縮変形することができるため、板部材１ｅの下面が全体的に磁気チャック面１０に圧着状態になる。このため、板部材１ｅの先端側に位置される変位部４の変位量、言い換えれば、当接片５の歪み量が大きくなり、加工物１５に対しより大きな押圧力が得られる。 According to this modified example, when the magnetic force is generated on the magnetic chuck surface 10, the elastic deformation portion 3 can be compressed and deformed so as not to protrude from the lower surface 8, so that the lower surface of the plate member 1 e is entirely on the magnetic chuck surface 10. It will be in a crimped state. For this reason, the displacement amount of the displacement portion 4 positioned on the front end side of the plate member 1e, in other words, the distortion amount of the contact piece 5 is increased, and a greater pressing force is obtained against the workpiece 15.

〔実施例１および実施例２の変形例（図１１ないし図１４）〕
図１１ないし図１３は、実施例１および実施例２の変形例による非磁性体加工物のクランプ工具１を示している。 [Modifications of Embodiment 1 and Embodiment 2 (FIGS. 11 to 14)]
11 to 13 show a non-magnetic workpiece clamping tool 1 according to a modification of the first and second embodiments.

まず、図１１は、実施例１（図１〜図４）における板部材に対し、取っ手１７および当接片５が取付けられる部分（基体）と、磁力による吸引力が必要な部分（下端部７、９）とを別体構成する例である。より詳しくは、底面６あるいは下面８を有する下端部７、９を磁性体材料板で製作した部材２ａ、４ａで構成する。これに対し、それらが取付けられる基体１ｆは、磁性体材料、あるいは非磁性体材料のいずれかを問わず、適度な弾性を有している材料で構成する。基体１ｆの先端側端部には、当接片５が複数の取付ボルト１９によって一体に取付けられる。また、板部材２ａ、４ａは、それぞれ取付ボルト２８、２９により基体１ｆの下面に取付けられる。この例によると、基体１ｆを、軽い材料で構成できるから、クランプ工具１の全体の重量が軽量化できる。 First, FIG. 11 shows a portion (base) on which the handle 17 and the contact piece 5 are attached to the plate member in the first embodiment (FIGS. 1 to 4), and a portion (lower end portion 7) that requires an attractive force by magnetic force. 9) is a separate configuration example. More specifically, the lower end portions 7 and 9 having the bottom surface 6 or the lower surface 8 are constituted by members 2a and 4a made of a magnetic material plate. On the other hand, the base 1f to which they are attached is made of a material having an appropriate elasticity regardless of whether it is a magnetic material or a non-magnetic material. The contact piece 5 is integrally attached to the end portion on the front end side of the base 1 f by a plurality of attachment bolts 19. The plate members 2a and 4a are attached to the lower surface of the base 1f by attachment bolts 28 and 29, respectively. According to this example, since the base 1f can be made of a light material, the overall weight of the clamping tool 1 can be reduced.

図１２は、板部材に対する当接片５の取付け態様の変形例であり、いずれの例も、当接片５を、板部材１ｇ側の先端側の端面ではなく、上面あるいは下面に取付ける例であり、また、加工物１５に対して、側面ではなく上面側より、磁気チャック面１０側に向けて押圧するように当接面１６を設ける例である。本実施例の当接片５は、上方に延在される延在部５ａの両端より、上記方向に向きを変えて延びる係合部３３および取付部１１を有し、側面方向（図示紙面側）より見て略クランク状に設けられている。そして、図１２のａのように、取付部材１１を変位部４の下面に取付ボルト３０によってねじ止めにより取り外し可能とするか、または図１２のｂのように、取付部材１１を変位部４の上面に取付ボルト３０によってねじ止めにより取り外し可能な状態として固定される。このように、当接片５の取付け位置は、変位部４の先端面に限らず、変位部４の上面または下面でもよい。なお、この例において、ベース部２、弾性変形部３および変位部４の構成は、実施例１（図１ないし図３）のものと同様である。 FIG. 12 is a modification of the manner in which the contact piece 5 is attached to the plate member. Each example is an example in which the contact piece 5 is attached to the upper surface or the lower surface instead of the end surface on the front end side on the plate member 1g side. There is also an example in which the contact surface 16 is provided so as to press the workpiece 15 from the upper surface side rather than the side surface toward the magnetic chuck surface 10 side. The contact piece 5 of the present embodiment has an engaging portion 33 and an attaching portion 11 extending in opposite directions from both ends of the extending portion 5a extending upward, and in the side surface direction (the drawing paper side). ) Is provided in a substantially crank shape. Then, as shown in FIG. 12 a, the attachment member 11 can be removed by screwing with the attachment bolt 30 on the lower surface of the displacement portion 4, or the attachment member 11 is removed from the displacement portion 4 as shown in FIG. It is fixed to the upper surface by a mounting bolt 30 so as to be removable by screwing. Thus, the attachment position of the contact piece 5 is not limited to the distal end surface of the displacement portion 4, and may be the upper surface or the lower surface of the displacement portion 4. In this example, the configurations of the base portion 2, the elastic deformation portion 3, and the displacement portion 4 are the same as those of the first embodiment (FIGS. 1 to 3).

図１３は、当接片５を取付け位置で補強しながら変位部４に取り外し可能取付ける変形例である。図１３のａにおいて、当接片５は、当接片５の撓み変形量を減らし、剛性を強くして、加工物１５に対する押圧力を高め、必要な把持力を確保するために、補助の当接片５とともに重ね板ばね状として変位部４の先端面に取付ボルト１９により取付けられている。なお、この例で、ベース部２、弾性変形部３および変位部４の構成は、実施例１（図１ないし図３）のものと同様である。 FIG. 13 shows a modification in which the contact piece 5 is detachably attached to the displacement portion 4 while being reinforced at the attachment position. In FIG. 13a, the abutment piece 5 reduces the amount of deformation of the abutment piece 5, increases the rigidity, increases the pressing force on the workpiece 15, and secures the necessary gripping force. Together with the abutting piece 5, it is attached to the distal end surface of the displacement portion 4 by a mounting bolt 19 as a laminated leaf spring shape. In this example, the configurations of the base portion 2, the elastic deformation portion 3, and the displacement portion 4 are the same as those of the first embodiment (FIGS. 1 to 3).

また、図１３のｂにおいて、当接片５は、変位部４の上面にねじ３２により取付けられているＬ形アングル材の補強材３１によって補強されている。補強材３１は、当接片５の背面部分に当接し、加工物１５を押圧するときに、当接片５の変形量を減らし、押圧力を強化している。なお、この例でも、ベース部２、弾性変形部３および変位部４の構成は、実施例１（図１ないし図３）のものと同様である。 Further, in FIG. 13 b, the contact piece 5 is reinforced by an L-shaped angle reinforcing member 31 attached to the upper surface of the displacement portion 4 by a screw 32. When the reinforcing material 31 abuts against the back surface portion of the abutting piece 5 and presses the workpiece 15, the amount of deformation of the abutting piece 5 is reduced and the pressing force is strengthened. In this example as well, the configurations of the base portion 2, the elastic deformation portion 3 and the displacement portion 4 are the same as those of the first embodiment (FIGS. 1 to 3).

図１３のａでは、当接片５の重ね枚数を変更するか、厚みの異なる当接片５を重ねることにより、また図１３のｂでは、補強材３１の厚みを異ならせるか、または当接片５に対する補強材３１の当たり加減または高さを調節することにより、当接片５の変形による反力（押圧力）を調節可能とすることもできる。 In FIG. 13 a, the number of the contact pieces 5 is changed or the contact pieces 5 having different thicknesses are stacked, and in FIG. 13 b, the thickness of the reinforcing material 31 is changed or the contact pieces 5 are contacted. The reaction force (pressing force) due to the deformation of the contact piece 5 can be adjusted by adjusting the height of the reinforcing member 31 with respect to the piece 5 or adjusting the height.

本発明をより発展させたものとして、以下の変形例が考えられる。例えば図７に示す、クランプ工具１の両側に当接片を設けるものについて、当接片５を、外側に変位させる代わりに、内側に変位させるように構成してもよい。次に図１４は、反り方向を逆方向つまり上に凸とする板部材１ｈの両側に、当接片５をそれぞれ設け、磁力による板部材１ｈの弾性変形時に、左右の当接片５を内側に変位させる例である。この例では、板部材の左右の端部が、ベース部２および変位部４を兼用しており、板部材の中央部（凸部）が、弾性変形部３に相当する。加工物１５は、板部材の上に載置される。磁気チャック面１０に磁力を発生させると、弓なり状の板部材の中央部が磁気チャック面１０に吸着されて圧接するように変形するため、左右一対の当接片５は、内側に向けて変位し、その結果、１個の加工物１５を両側から挟み込むように把持することになる。 As a further development of the present invention, the following modifications can be considered. For example, as shown in FIG. 7, the contact piece 5 provided on both sides of the clamp tool 1 may be configured to be displaced inward instead of outwardly. Next, FIG. 14 shows that the abutting pieces 5 are provided on both sides of the plate member 1h whose warping direction is opposite, that is, convex upward, and the left and right abutting pieces 5 are placed inside when the plate member 1h is elastically deformed by a magnetic force. This is an example of displacement. In this example, the left and right end portions of the plate member also serve as the base portion 2 and the displacement portion 4, and the central portion (convex portion) of the plate member corresponds to the elastic deformation portion 3. The workpiece 15 is placed on the plate member. When a magnetic force is generated on the magnetic chuck surface 10, the center portion of the bow-shaped plate member is attracted to the magnetic chuck surface 10 and deforms so as to come into pressure contact therewith, so that the pair of left and right contact pieces 5 are displaced inward. As a result, one workpiece 15 is gripped so as to be sandwiched from both sides.

以上の例において、当接片５は、当接面１６により加工物１５の側面に当接し、その側面を押圧しているが、その当接（押圧）位置は、加工物１５の側面に限らず、図１２のａや図１２ｂに例示するように、当接片５の先端に適当な形状の係合部３３を設ければ、加工物１５の上面とすることもできる。この点については、実施例２およびその変形例にも適用可能である。この場合、クランプ動作時に、係合部３３は、加工物１５の上面を下方に向けて押圧することになる。この係合部３３は、必要に応じてすべての実施例について適用できる。なお、係合部３３の形状は、加工物１５のクランプ位置の形状に応じてＬ形や鉤形として、当接片５と同じ部材により構成するか、または当接片５と別の部材により構成し、当接片５の先端に取付けられる。 In the above example, the contact piece 5 contacts the side surface of the workpiece 15 by the contact surface 16 and presses the side surface, but the contact (pressing) position is limited to the side surface of the workpiece 15. First, as illustrated in FIG. 12 a and FIG. 12 b, the upper surface of the workpiece 15 can be formed by providing an engagement portion 33 having an appropriate shape at the tip of the contact piece 5. This point can also be applied to the second embodiment and its modifications. In this case, during the clamping operation, the engaging portion 33 presses the upper surface of the workpiece 15 downward. The engaging portion 33 can be applied to all the embodiments as required. Note that the shape of the engaging portion 33 is L-shaped or saddle-shaped depending on the shape of the clamp position of the work piece 15 and is configured by the same member as the contact piece 5 or by a member different from the contact piece 5. It is constructed and attached to the tip of the contact piece 5.

本発明のクランプ工具１は、工作機械の加工テーブルや割り出し円テーブルなどに取付けられる磁気チャック装置で非磁性体材料の加工物１５をクランプするときに利用できる。 The clamping tool 1 of the present invention can be used when a workpiece 15 made of a non-magnetic material is clamped by a magnetic chuck device attached to a machining table or an indexing circular table of a machine tool.

なお、本発明の前提となる磁気チャック面１０は、電磁式チャック、永磁式チャックまたは永電磁式チャックのチャック面とすることができる。 The magnetic chuck surface 10 which is a premise of the present invention can be a chuck surface of an electromagnetic chuck, a permanent magnet chuck or a permanent electromagnetic chuck.

上記電磁式チャックは、埋め込まれた電磁石への通電によりチャック面から磁力を発生して、加工物１５をクランプするものであり、非通電にすることで加工物１５をアンクランプ状態とするが、クランプ状態では、常時通電する必要があり、省エネルギーの面で難点がある。 The electromagnetic chuck generates a magnetic force from the chuck surface by energizing the embedded electromagnet, and clamps the workpiece 15. By deenergizing the workpiece 15, the workpiece 15 is unclamped. In the clamped state, it is necessary to energize at all times, which is difficult in terms of energy saving.

上記永磁式チャックは、内部で永久磁石をチャック面に近づくように移動させることで、チャック面から磁力を発生させ、加工物１５をクランプするものであり、永久磁石をチャック面から遠ざけるように移動させることで加工物１５をアンクランプ状態とする。 The permanent magnet chuck moves the permanent magnet inside so as to approach the chuck surface, generates a magnetic force from the chuck surface, and clamps the work piece 15 so that the permanent magnet is moved away from the chuck surface. The workpiece 15 is brought into an unclamped state by being moved.

上記永電磁式チャックは、内部に埋め込まれた磁性体に巻き付けたコイルに通電することにより、磁性体を永久磁石に磁化させてして、チャック面から磁力を発生させ、加工物１５をクランプする。徐々に減衰する交流電流をコイルに通電することで、磁性体（永久磁石）を脱磁し、加工物１５をアンクランプ状態とする。永電磁式チャックでは、一度磁化すれば、通電しなくても、クランプ状態が維持されるため、省エネルギーの面で有利となる。 The permanent electromagnetic chuck magnetizes the magnetic material to the permanent magnet by energizing the coil wound around the magnetic material embedded therein, thereby generating a magnetic force from the chuck surface and clamping the workpiece 15. . By energizing the coil with an alternating current that gradually attenuates, the magnetic body (permanent magnet) is demagnetized, and the workpiece 15 is placed in an unclamped state. In the permanent electromagnetic chuck, once magnetized, the clamped state is maintained without energization, which is advantageous in terms of energy saving.

本発明の実施例１によるクランプ工具１の使用状態の正面図である。It is a front view of the use condition of the clamp tool 1 by Example 1 of this invention. 本発明の実施例１によるクランプ工具１の使用状態の一部の拡大正面図である。It is a partial expanded front view of the use condition of the clamp tool 1 by Example 1 of this invention. 本発明の実施例１によるクランプ工具１の要部の説明図である。It is explanatory drawing of the principal part of the clamp tool 1 by Example 1 of this invention. 本発明の実施例１によるクランプ工具１の作用説明図である。It is action | operation explanatory drawing of the clamp tool 1 by Example 1 of this invention. 本発明の実施例１の変形例によるクランプ工具１の作用説明図である。It is action | operation explanatory drawing of the clamp tool 1 by the modification of Example 1 of this invention. 本発明の実施例１の変形例によるクランプ工具１の正面図である。It is a front view of the clamp tool 1 by the modification of Example 1 of this invention. 本発明の実施例１の変形例によるクランプ工具１の正面図である。It is a front view of the clamp tool 1 by the modification of Example 1 of this invention. 本発明の実施例２によるクランプ工具１の使用状態の一部の拡大正面図である。It is a partial expanded front view of the use condition of the clamp tool 1 by Example 2 of this invention. 本発明の実施例２によるクランプ工具１の作用説明図である。It is action | operation explanatory drawing of the clamp tool 1 by Example 2 of this invention. 本発明の実施例２の変形例によるクランプ工具１の要部の拡大正面図である。It is an enlarged front view of the principal part of the clamp tool 1 by the modification of Example 2 of this invention. 本発明の変形例によるクランプ工具１の正面図である。It is a front view of the clamp tool 1 by the modification of this invention. 本発明の変形例によるクランプ工具１の正面図である。It is a front view of the clamp tool 1 by the modification of this invention. 本発明の変形例によるクランプ工具１の正面図である。It is a front view of the clamp tool 1 by the modification of this invention. 本発明の変形例によるクランプ工具１の正面図である。It is a front view of the clamp tool 1 by the modification of this invention.

符号の説明Explanation of symbols

１ クランプ工具
１ａ 板部材
１ｂ 上面
１ｃ 上面
１ｄ 板部材
１ｅ 板部材
１ｆ 基体
１ｇ 板部材
２ ベース部
２ａ 磁性体材料
２ｂ 先端位置
３ 弾性変形部
４ 変位部
４ａ 磁性体材料
５ 当接片
５ａ 延在部
６ 底面
７ 下端部
８ 下面
９ 下端部
１０ 磁気チャック面
１１ 取付部材
１２ 薄肉部
１４ 埋め込み用の溝
１５ 加工物
１５ａ 側面
１６ 当接面
１７ 取っ手
１８ 溝
１８ａ 底面
１９ 取付ボルト
２０ スリット
２１ 連結部材
２２ 取付部
２３ 取付部
２４ 取付ボルト
２５ 取付ボルト
２６ 取付ボルト
２７ 位置決め用のブロック
２８ 取付ボルト
２９ 取付ボルト
３０ 取付ボルト
３１ 補強材
３２ ねじ
３３ 係合部
４２ ベース部材
４４ 変位部材
４６ 連結部材
４８ ベース部材
５０ 板部材
５２ 板部材
５８ 単一部材 DESCRIPTION OF SYMBOLS 1 Clamp tool 1a Plate member 1b Upper surface 1c Upper surface 1d Plate member 1e Plate member 1f Base member 1g Plate member 2 Base part 2a Magnetic body material 2b Tip position 3 Elastic deformation part 4 Displacement part 4a Magnetic body material 5 Contact piece 5a Extension part 6 Bottom surface 7 Lower end portion 8 Lower surface portion 9 Lower end portion 10 Magnetic chuck surface 11 Mounting member 12 Thin portion 14 Embedded groove 15 Workpiece 15a Side surface 16 Contact surface 17 Handle 18 Groove 18a Bottom surface 19 Mounting bolt 20 Slit 21 Connecting member 22 Mounting Part 23 mounting part 24 mounting bolt 25 mounting bolt 26 mounting bolt 27 positioning block 28 mounting bolt 29 mounting bolt 30 mounting bolt 31 reinforcing material 32 screw 33 engaging part 42 base member 44 displacement member 46 connecting member 48 base member 50 plate Member 52 Plate member 58 Single member

Claims (9)

磁性体材料で設けられる吸着用の下端部（７）に平坦な底面（６）を有するベース部（２）と、
同じく磁性体材料で設けられる吸引用の下端部（９）に平坦な下面（８）を有し、ベース部（２）に連結される変位部（４）と、
変位部（４）の先端位置で変位部（４）の上面（１ｃ）より高い位置に突出するとともに、変位部（４）に対して取り外し可能に設けられるか、またはベース部（２）と一体に変位する変位部（４）に一体的に設けられた部材に対して取り外し可能に設けられる当接片（５）と、
変位部（４）に弾性変形可能に設けられる弾性変形部（３）と、を備え、
ベース部（２）の下端部（７）を介して磁気チャック面（１０）上に設置された状態で、前記変位部（４）は、磁気チャック面（１０）と下面（８）との間に隙間を有するように設けられており、
磁気チャック面（１０）からの磁力発生時には、ベース部（２）の底面（６）が磁気チャック面（１０）に磁気的に圧着されるとともに、弾性変形部（３）は、変位部（４）の下端部（９）に作用する磁気的吸引力を受けて弾性変形されるように変位部（４）に設けられることを特徴とする非磁性体加工物のクランプ工具（１）。 A base portion (2) having a flat bottom surface (6) at a lower end portion (7) for adsorption provided by a magnetic material;
A displacement portion (4) having a flat lower surface (8) at the lower end portion (9) for suction provided by the magnetic material and connected to the base portion (2),
The tip of the displacement part (4) protrudes to a position higher than the upper surface (1c) of the displacement part (4), and is provided so as to be removable from the displacement part (4) or integrated with the base part (2). A contact piece (5) provided detachably with respect to a member provided integrally with the displacement part (4) displaced to
An elastic deformation part (3) provided on the displacement part (4) so as to be elastically deformable,
The displacement portion (4) is disposed between the magnetic chuck surface (10) and the lower surface (8) in a state of being installed on the magnetic chuck surface (10) via the lower end portion (7) of the base portion (2). Is provided with a gap,
When a magnetic force is generated from the magnetic chuck surface (10), the bottom surface (6) of the base portion (2) is magnetically pressure-bonded to the magnetic chuck surface (10), and the elastic deformation portion (3) is a displacement portion (4). A clamping tool (1) for a non-magnetic workpiece, wherein the clamping tool (1) is provided on the displacement portion (4) so as to be elastically deformed by receiving a magnetic attraction acting on the lower end portion (9) of the above. 変位部（４）の前記下面（８）は、非磁力発生状態の磁気チャック面（１０）にベース部（２）の下端部（７）を介して設置された状態で、ベース部（２）の底面（６）に対して平行かまたは変位部（４）の先端側に向けて高さ方向に低くなる傾斜態様のいずれかにより平面状に形成されるとともに、変位部（４）の下面（８）の先端部の高さ方向の位置は、ベース部（２）の底面（６）の位置よりも高くなるように設けられることにより前記隙間が設けられており、
変位部（４）には、前記ベース部（２）と当接片（５）が取付けられる取付部との間の少なくとも一部の領域に、磁力発生状態における磁気チャック面（１０）からの吸引力を受けて弾性変形可能な肉厚の弾性変形部（３）が設けられる、ことを特徴とする請求項１に記載の非磁性体加工物のクランプ工具（１）。 The lower surface (8) of the displacement portion (4) is placed on the magnetic chuck surface (10) in a non-magnetic force generation state via the lower end portion (7) of the base portion (2), and the base portion (2) Is formed in a planar shape by either an inclining aspect that is parallel to the bottom surface (6) or lower in the height direction toward the distal end side of the displacement portion (4), and the lower surface of the displacement portion (4) ( 8) The height direction position of the tip portion is provided to be higher than the position of the bottom surface (6) of the base portion (2), thereby providing the gap.
In the displacement part (4), at least a part of the area between the base part (2) and the attachment part to which the contact piece (5) is attached is attracted from the magnetic chuck surface (10) in a magnetic force generation state. A clamping tool (1) for a non-magnetic workpiece according to claim 1, characterized in that a thick elastic deformation part (3) is provided that can be elastically deformed under force. ベース部（２）と変位部（４）と弾性変形部（３）は、単一の板部材（１ａ）で構成されるとともに、弾性変形部（３）は、前記領域の少なくとも一部でベース部（２）の肉厚よりも薄く設けられることを特徴とする請求項２に記載の非磁性体加工物のクランプ工具（１）。 The base portion (2), the displacement portion (4), and the elastic deformation portion (3) are configured by a single plate member (1a), and the elastic deformation portion (3) is a base in at least a part of the region. The clamping tool (1) for a non-magnetic workpiece according to claim 2, wherein the clamping tool (1) is provided thinner than a thickness of the portion (2). 前記弾性変形部（３）は、変位部（４）の先端側の肉厚よりも薄肉の薄肉部（１２）を、変位部（４）の上面または下面のうち１以上に形成された溝（１８）により形成する、ことを特徴とする請求項３に記載の非磁性体加工物のクランプ工具（１）。 The elastically deformable portion (3) has a thin-walled portion (12) that is thinner than the thickness on the distal end side of the displaced portion (4), and is formed in a groove ( The clamping tool (1) for a non-magnetic workpiece according to claim 3, wherein the clamping tool (1) is formed by 18). 弾性変形部（３）は、弾性変形可能な材料で、変位部（４）の先端近傍の下面（８）より突出するように板部材（１ｅ）に設けられており、
非磁力発生状態の磁気チャック面（１０）に、ベース部（２）の下端部（７）と突出される弾性変形部（３）とを介して設置された状態で、変位部（４）の下面（８）と磁気チャック面（１０）との間に隙間を形成する、ことを特徴とする請求項１に記載の非磁性体加工物のクランプ工具（１）。 The elastic deformation portion (3) is an elastically deformable material and is provided on the plate member (1e) so as to protrude from the lower surface (8) in the vicinity of the tip of the displacement portion (4).
The displacement part (4) is installed on the magnetic chuck surface (10) in a non-magnetic force generation state via the lower end part (7) of the base part (2) and the elastic deformation part (3) protruding. The clamping tool (1) for a non-magnetic workpiece according to claim 1, wherein a gap is formed between the lower surface (8) and the magnetic chuck surface (10). ベース部（２）と変位部（４）は、連続する単一の板部材（１ｅ）で構成されることを特徴とする請求項５に記載の非磁性体加工物のクランプ工具（１）。 The clamping tool (1) for a non-magnetic workpiece according to claim 5, wherein the base part (2) and the displacement part (4) are constituted by a single continuous plate member (1e). 弾性変形部（３）が設けられる変位部（４）の下端部（９）には、埋め込み用の溝（１４）が形成されるとともに、弾性変形部（３）は、溝（１４）の上底部に接した状態に収容されており、かつ弾性変形部（３）は、非磁力発生状態の磁気チャック面（１０）にベース部（２）の下端部（７）を介して設置された状態で、変位部（４）の下面（８）より下方に突出するように設けられる、ことを特徴とする請求項５または６に記載の非磁性体加工物のクランプ工具（１）。 An embedding groove (14) is formed at the lower end (9) of the displacement part (4) where the elastic deformation part (3) is provided, and the elastic deformation part (3) is located above the groove (14). The elastic deformation portion (3) is housed in contact with the bottom portion, and is installed on the magnetic chuck surface (10) in a non-magnetic force generation state via the lower end portion (7) of the base portion (2). The non-magnetic workpiece clamping tool (1) according to claim 5 or 6, wherein the clamping tool (1) is provided so as to protrude downward from the lower surface (8) of the displacement portion (4). 当接片（５）は、磁力発生時の磁気的吸引力によって変位部（４）が変位する際に、変位部（４）の上面（１ｂ）に対応する高さ位置から加工物（１５）への当接点までの領域の一部が弾性変形可能に設けられる、ことを特徴とする請求項１に記載の非磁性体加工物のクランプ工具（１）。 When the displacement part (4) is displaced by the magnetic attractive force when the magnetic force is generated, the contact piece (5) is moved from the height position corresponding to the upper surface (1b) of the displacement part (4) from the workpiece (15). 2. The clamping tool (1) for a non-magnetic workpiece according to claim 1, wherein a part of the region up to the contact point is provided so as to be elastically deformable. 当接片（５）は、単一の板部材で構成されており、変位部（４）の上面（１ｃ）よりも高い位置において、加工物（１５）に対する板部材の当接面（１６）は、磁気チャック面（１０）に対する垂直線（ｕ）に対し加工物（１５）側にわずかに傾斜するように変位部（４）に取付けられる、ことを特徴とする請求項１に記載の非磁性体加工物のクランプ工具（１）。 The contact piece (5) is composed of a single plate member, and the contact surface (16) of the plate member with respect to the workpiece (15) at a position higher than the upper surface (1c) of the displacement portion (4). The non-rotating part according to claim 1, characterized in that it is attached to the displacement part (4) so as to be slightly inclined toward the workpiece (15) with respect to the vertical line (u) with respect to the magnetic chuck surface (10). Clamp tool for magnetic workpiece (1).
JP2008112836A 2008-04-23 2008-04-23 Clamping tool of nonmagnetic material workpiece Pending JP2009262259A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103909479A (en) * 2013-12-27 2014-07-09 中山市利群精密实业有限公司 Clamping device for machining insert
CN108890341A (en) * 2018-08-14 2018-11-27 安徽新洲钢业有限公司 One kind being used for the mach support frame of steel
CN113231974A (en) * 2021-05-17 2021-08-10 夏明芳 Precision machining jig for optical instrument foot rest

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JPS63197051U (en) * 1987-06-09 1988-12-19
JPH0489619U (en) * 1990-11-16 1992-08-05
JP3030237U (en) * 1995-12-27 1996-10-22 裕康 野屋敷 Grip surface variable vise

Patent Citations (3)

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JPS63197051U (en) * 1987-06-09 1988-12-19
JPH0489619U (en) * 1990-11-16 1992-08-05
JP3030237U (en) * 1995-12-27 1996-10-22 裕康 野屋敷 Grip surface variable vise

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103909479A (en) * 2013-12-27 2014-07-09 中山市利群精密实业有限公司 Clamping device for machining insert
CN108890341A (en) * 2018-08-14 2018-11-27 安徽新洲钢业有限公司 One kind being used for the mach support frame of steel
CN108890341B (en) * 2018-08-14 2019-10-15 安徽新洲钢业有限公司 One kind being used for the mach support frame of steel
CN113231974A (en) * 2021-05-17 2021-08-10 夏明芳 Precision machining jig for optical instrument foot rest
CN113231974B (en) * 2021-05-17 2023-12-26 深圳市飞尔光学技术有限公司 Precision machining jig for optical instrument foot rest

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