JP2012143868A - Clamp device - Google Patents
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- JP2012143868A JP2012143868A JP2012106945A JP2012106945A JP2012143868A JP 2012143868 A JP2012143868 A JP 2012143868A JP 2012106945 A JP2012106945 A JP 2012106945A JP 2012106945 A JP2012106945 A JP 2012106945A JP 2012143868 A JP2012143868 A JP 2012143868A
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- 239000012530 fluid Substances 0.000 claims description 25
- 238000012790 confirmation Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 8
- 230000004308 accommodation Effects 0.000 claims description 5
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 210000000078 claw Anatomy 0.000 description 6
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
Description
本発明は、ワークの穴をグリップして固定するクランプ装置に関し、特にグリップ部材に対するクランプロッドの相対移動の最大ストロークを制限するクランプ装置に関する。 The present invention relates to a clamping device that grips and fixes a hole in a workpiece, and more particularly, to a clamping device that limits a maximum stroke of a relative movement of a clamp rod with respect to a grip member.
ワークの上面を機械加工するような場合には、ワークの端部を上方から押圧具で押圧する形式のクランプ装置を採用することができないため、上記のようなクランプ装置(所謂、ホールクランプ)が採用される。このクランプ装置では、本体部材にクランプ対象のワークを着座させる着座面が形成され、ワーク投入時にワークを着座面に搭載して支持し、ワークの穴にグリップ部材と、このグリップ部材に挿入されたクランプロッドのテーパ軸部を挿入し、クランプロッドを着座面側へ引き付けることで、グリップ部材に対してクランプロッドを所定ストローク相対移動させ、テーパ軸部によりグリップ爪を拡径させて穴の内周面に係合(グリップ)させてから、そのグリップ部材を更に着座面側へ所定引き込みストローク引き付けることで、ワークを着座面に固定する。この種のクランプ装置が、特許文献1,2に記載されている。 In the case of machining the upper surface of the workpiece, a clamp device that presses the end of the workpiece with a pressing tool from above cannot be used. Adopted. In this clamping device, a seating surface for seating a workpiece to be clamped is formed on the main body member, and the workpiece is mounted and supported on the seating surface when the workpiece is loaded, and the grip member is inserted into the hole of the workpiece, and the grip member is inserted into the grip member. By inserting the taper shaft of the clamp rod and pulling the clamp rod toward the seating surface, the clamp rod is moved relative to the grip member by a predetermined stroke, and the grip pawl is enlarged by the taper shaft to increase the inner circumference of the hole. After engaging (grip) with the surface, the workpiece is fixed to the seating surface by further pulling the grip member toward the seating surface and drawing a predetermined stroke. This type of clamping device is described in Patent Documents 1 and 2.
通常、ホールクランプは、本体部材の中央部からグリップ部材とテーパ軸部が所定長さ突出するように構成され、グリップ部材は圧縮コイルスプリングによってワーク側(上限位置)に付勢されている。それ故、クランプ動作時、本体部材とグリップ部材との間にクランプロッドの引き込み動作に伴う隙間が発生する。この隙間から切削屑や塵埃等が本体部材内部に入り込むと、クランプロッドの駆動機構等の作動不良や破損の原因になるため、本体部材とグリップ部材との間、所謂グリップ部材の外周面を弾性材料製シール部材、例えばスクレーパ等によってシールしている。 Usually, the hole clamp is configured such that the grip member and the taper shaft protrude from the center portion of the main body member by a predetermined length, and the grip member is biased toward the workpiece side (upper limit position) by a compression coil spring. Therefore, during the clamping operation, a gap is generated between the main body member and the grip member due to the pulling operation of the clamp rod. If cutting waste or dust enters the main body member from this gap, it may cause malfunction or damage of the clamp rod drive mechanism, etc., so the outer peripheral surface of the so-called grip member is elastic between the main body member and the grip member. Sealing is performed by a material sealing member such as a scraper.
特許文献1,2のようなホールクランプでは、ワーク形状や構造によって、グリップ部材の係合不良であるスリップや空クランプを行なうことがある。
即ち、ワークが鋳造品でその穴が僅かにテーパ形状に形成されている場合、グリップ部材のグリップ爪部がワーク穴の内周面に係合できないため、グリップ部材のスリップ状態が発生する。また、生産ライン上において複数のクランプ装置を同期駆動してワークを固定する場合、ワーク構造により一部のクランプ装置に対して対応した穴が存在しないとき、クランプミス(空クランプ)状態が発生する。このようなスリップ状態やクランプミス状態が生じたとき、クランプロッドを進退移動させる流体圧シリンダが下限位置まで移動するため、クランプロッドが下限位置に移動し、最終的にグリップ部材が大きく拡径動作する。
In the hole clamps as disclosed in Patent Documents 1 and 2, depending on the shape and structure of the workpiece, slipping or empty clamping that is poor engagement of the grip member may be performed.
That is, when the workpiece is a cast product and the hole is formed in a slightly tapered shape, the grip claw portion of the grip member cannot engage with the inner peripheral surface of the workpiece hole, so that the grip member slips. In addition, when a workpiece is fixed by synchronously driving a plurality of clamping devices on a production line, a clamping error (empty clamping) state occurs when there is no corresponding hole for some clamping devices due to the workpiece structure. . When such slipping or clamping failure occurs, the fluid pressure cylinder that moves the clamp rod back and forth moves to the lower limit position, so the clamp rod moves to the lower limit position, and the grip member finally expands greatly. To do.
本体部材とグリップ部材との間に、切削屑等による侵入防止用スクレーパを装着したホールクランプでは、グリップ部材が大きく拡径された場合、スクレーパがグリップ部材の拡径に追従して大きく押し広げられる。それ故、スリップ状態やクランプミス状態が頻繁に繰り返された場合には、スクレーパの弾性特性が許容できる範囲以上の過剰な拡径により損傷し、スクレーパの寿命低下を招き、スクレーパの交換が必要になる。 In the case of a hole clamp equipped with a scraper for preventing intrusion due to cutting dust or the like between the main body member and the grip member, when the grip member is greatly expanded in diameter, the scraper is greatly expanded following the expansion of the grip member. . Therefore, if the slip state or the clamping error state is repeated frequently, the scraper will be damaged by excessive diameter expansion beyond the allowable range, leading to a decrease in the life of the scraper, and the scraper must be replaced. Become.
本発明の目的は、ワークに対するグリップ性能を高めつつ、簡単な構造でスクレーパの損傷を防止可能なクランプ装置を提供することである。 An object of the present invention is to provide a clamping device capable of preventing a scraper from being damaged with a simple structure while improving grip performance with respect to a workpiece.
請求項1のクランプ装置は、 ワークの穴に下方から挿入されて穴の内周面をグリップ可能なグリップ部材と、このグリップ部材に内嵌係合させたテーパ軸部を有するクランプロッドと、前記グリップ部材とクランプロッドとを軸心方向へ進退駆動可能な流体圧シリンダと、前記グリップ部材とクランプロッドと流体圧シリンダが付設される本体部材とを有するクランプ装置において、前記本体部材の上半部の中心部に上方へ突出する円筒状の本体筒部と、前記流体圧シリンダによりクランプロッドをグリップ部材に対して下方へ相対移動させてグリップ部材を拡径させる際にグリップ部材を上限位置に支持可能な支持機構とを備え、アンクランプ状態のとき前記グリップ部材の上半部と前記クランプロッドのテーパ軸部が前記本体筒部の上端外へ突出するように構成すると共に、前記相対移動の最大ストロークを前記支持機構により制限するように構成したことを特徴としている。 The clamp device according to claim 1 is a grip member that is inserted into the hole of the workpiece from below and can grip the inner peripheral surface of the hole, a clamp rod having a tapered shaft portion that is fitted and engaged with the grip member, An upper half of the main body member, comprising: a fluid pressure cylinder capable of driving the grip member and the clamp rod back and forth in an axial direction; and a main body member provided with the grip member, the clamp rod, and the fluid pressure cylinder. A cylindrical main body tube portion projecting upward from the center of the grip member and the grip member is supported at the upper limit position when the grip rod member is expanded relative to the grip member by the fluid pressure cylinder relative to the grip member. A support mechanism capable of holding the upper half of the grip member and the taper shaft of the clamp rod above the body cylinder when in the unclamped state. Together configured to protrude outside, it is characterized in that the maximum stroke of the relative movement and configured to limit by the support mechanism.
このクランプ装置では、グリップ部材を拡径させる際、支持機構がグリップ部材を上限位置に支持するため、上限位置に支持されたグリップ部材に対してクランプロッドを確実に下方へ相対移動することができる。 In this clamp device, when the diameter of the grip member is increased, the support mechanism supports the grip member at the upper limit position, so that the clamp rod can be reliably moved downward relative to the grip member supported at the upper limit position. .
請求項2のクランプ装置は、請求項1の発明において、前記本体筒部の上端部に形成されたワーク着座用の着座面と、前記流体圧シリンダのピストン部材を構成するピストン部及びこのピストン部から上方へ本体筒部内まで延びるロッド部と、前記ロッド部に外嵌され流体圧で上方へ付勢された環状受圧部材と、前記ロッド部に可動に外嵌され且つ環状受圧部材と一体的に動作して前記グリップ部材を下方から支持するサポート部材とを備え、前記支持機構が前記環状受圧部材とサポート部材と環状受圧部材の下端に流体圧を作用させる環状作動室とを備えたことを特徴としている。 According to a second aspect of the present invention, there is provided the clamping device according to the first aspect, wherein the workpiece seating surface formed at the upper end portion of the main body cylinder portion, the piston portion constituting the piston member of the fluid pressure cylinder, and the piston portion. A rod portion extending upward from the inside of the main body cylinder portion, an annular pressure receiving member externally fitted to the rod portion and urged upward by fluid pressure, and movably fitted to the rod portion and integrally formed with the annular pressure receiving member A support member that operates to support the grip member from below, and the support mechanism includes the annular pressure receiving member, the support member, and an annular working chamber that applies fluid pressure to a lower end of the annular pressure receiving member. It is said.
請求項3のクランプ装置は、請求項2の発明において、前記クランプロッドの下端部分に形成されたT形係合部と、前記ロッド部の上端部分に形成されて前記T形係合部が水平方向側方から係合可能なT形係合凹部とを有することを特徴としている。 According to a third aspect of the present invention, there is provided the clamping device according to the second aspect, wherein the T-shaped engaging portion is formed at the lower end portion of the clamp rod and the T-shaped engaging portion is formed at the upper end portion of the rod portion. It has a T-shaped engaging recess that can be engaged from the direction side.
請求項4のクランプ装置は、請求項3の発明において、前記ロッド部の上半部の上端部分と外周側部分は前記T形係合凹部を形成する外周側分割体に形成され、前記ロッド部の上半部の中心側部分にネジ軸部が形成され、前記外周側分割体がネジ軸部に螺合されたことを特徴としている。 According to a fourth aspect of the present invention, in the invention of the third aspect, the upper end portion and the outer peripheral side portion of the upper half portion of the rod portion are formed in an outer peripheral side divided body forming the T-shaped engaging recess, and the rod portion A screw shaft portion is formed at the center side portion of the upper half portion, and the outer peripheral side divided body is screwed into the screw shaft portion.
請求項5のクランプ装置は、請求項4の発明において、前記流体圧シリンダのピストン部と環状受圧部材との間に前記環状作動室を設け、この環状作動室が環状受圧部材に上方向きの流体圧を作用させるクランプ用流体作動室を構成したことを特徴としている。 According to a fifth aspect of the present invention, there is provided the clamping device according to the fourth aspect, wherein the annular working chamber is provided between the piston portion of the fluid pressure cylinder and the annular pressure receiving member, and the annular working chamber is upwardly directed to the annular pressure receiving member. It is characterized in that a fluid working chamber for clamping that applies pressure is configured.
請求項6のクランプ装置は、請求項5の発明において、前記環状受圧部材の筒状ピストンの上端部に形成した係止鍔部が本体部材の収容穴に昇降可能に収容され、その係止鍔部を収容穴の下端壁で係止することで前記環状受圧部材の下限位置が規定され、前記係止鍔部を収容穴の上端壁で係止することで前記環状受圧部材の上限位置が規定されることを特徴としている。 According to a sixth aspect of the present invention, there is provided the clamping device according to the fifth aspect of the invention, wherein a locking collar formed at the upper end of the cylindrical piston of the annular pressure receiving member is accommodated in the accommodation hole of the main body member so as to be movable up and down. The lower limit position of the annular pressure receiving member is defined by locking the portion with the lower end wall of the receiving hole, and the upper limit position of the annular pressure receiving member is defined by locking the locking collar with the upper end wall of the receiving hole. It is characterized by being.
請求項7のクランプ装置は、請求項6の発明において、前記外周側分割体の下端部を下限位置にある環状受圧部材で受け止めることにより、クランプロッドの下限位置を規定するように構成したことを特徴としている。 According to a seventh aspect of the present invention, in the invention of the sixth aspect, the lower limit position of the clamp rod is defined by receiving the lower end portion of the outer peripheral side divided body with an annular pressure receiving member at the lower limit position. It is a feature.
請求項8のクランプ装置は、請求項7の発明において、前記サポート部材は前記環状受圧部材から分割した形に構成され、前記サポート部材の下端が前記環状受圧部材の筒状ピストンの上端に当接していることを特徴としている。 The clamp device according to an eighth aspect is the invention according to the seventh aspect, wherein the support member is divided from the annular pressure receiving member, and a lower end of the support member abuts on an upper end of a cylindrical piston of the annular pressure receiving member. It is characterized by having.
請求項9のクランプ装置は、請求項1の発明において、前記グリップ部材とクランプロッドとは、前記軸心と直交方向へ可動に形成されたことを特徴としている。
請求項10のクランプ装置は、請求項9の発明において、前記グリップ部材とクランプロッドの軸心を前記流体圧シリンダの軸心に一致させるようにグリップ部材とクランプロッドを弾性付勢する弾性付勢手段を設けたことを特徴としている。
According to a ninth aspect of the present invention, in the first aspect of the invention, the grip member and the clamp rod are formed so as to be movable in a direction orthogonal to the axis.
According to a tenth aspect of the present invention, in the invention of the ninth aspect, the elastic urging for elastically urging the grip member and the clamp rod so that the axes of the grip member and the clamp rod coincide with the axis of the fluid pressure cylinder. It is characterized by providing means.
請求項11のクランプ装置は、請求項6の発明において、前記収容室の下端壁に前記係止鍔部に対向状に開口されたエア噴出孔と、このエア噴出孔に加圧エアを供給するエア通路と、このエア通路内のエア圧の有無を検出するエア圧検出手段とを有する作動確認手段を設け、前記作動確認手段により、前記環状受圧部材が上限位置及び下限位置にある状態を検出可能に構成したことを特徴としている。 The clamp device according to claim 11 is the invention according to claim 6, wherein an air ejection hole that is opened oppositely to the locking collar on the lower end wall of the storage chamber, and pressurized air is supplied to the air ejection hole. An operation confirmation means having an air passage and an air pressure detection means for detecting the presence or absence of air pressure in the air passage is provided, and the operation confirmation means detects a state in which the annular pressure receiving member is at the upper limit position and the lower limit position. It is characterized by being configured to be possible.
請求項12のクランプ装置は、請求項1又は2の発明において、前記本体筒部は、アンクランプ状態の前記グリップ部材の外径の3倍以下の外径を有することを特徴としている。
請求項13のクランプ装置は、請求項1又は2の発明において、前記支持機構が上限位置に位置していることを検知可能な第1検知手段と、前記支持機構が下限位置に位置していることを検知可能な第2検知手段とを備えたことを特徴としている。
According to a twelfth aspect of the present invention, in the invention of the first or second aspect, the main body cylinder portion has an outer diameter that is not more than three times the outer diameter of the grip member in an unclamped state.
According to a thirteenth aspect of the present invention, in the invention of the first or second aspect, the clamp device according to the first or second aspect is capable of detecting that the support mechanism is located at the upper limit position, and the support mechanism is located at the lower limit position. And a second detection means capable of detecting this.
請求項1の発明によれば、上限位置に支持されたグリップ部材に対してクランプロッドを確実に下方へ相対移動できるため、ワークに対するグリップ性能を高くすることができる。グリップ部材を上限位置に支持可能な支持機構が、クランプロッドのグリップ部材に対する相対移動の最大ストロークを制限するため、スリップ状態やクランプミス(空クランプ)状態が発生したときでも、クランプロッドが下限位置まで移動されることを防止することができ、グリップ部材の過剰な拡径を防止することができる。
これにより、グリップ部材の外周面をシールするスクレーパを備えたクランプ装置であっても、簡単な構造でスクレーパの損傷を防止することができる。
According to the first aspect of the present invention, since the clamp rod can be reliably moved downward relative to the grip member supported at the upper limit position, the grip performance for the workpiece can be enhanced. The support mechanism that can support the grip member at the upper limit position limits the maximum stroke of the relative movement of the clamp rod with respect to the grip member, so the clamp rod can be moved to the lower limit position even when a slip condition or a clamp error (empty clamp) occurs. Can be prevented, and excessive expansion of the grip member can be prevented.
Thereby, even if it is a clamp apparatus provided with the scraper which seals the outer peripheral surface of a grip member, damage to a scraper can be prevented with a simple structure.
請求項2の発明によれば、着座面にワークを支持し、グリップ部材とテーパ軸部を穴に挿入し、グリップ部材を流体圧で上方へ付勢される環状受圧部材及びサポート部材で支持した状態で、クランプロッドを下降駆動してグリップ部材を穴の壁面に食い込ませてから、クランプロッドを下降駆動することで、ワークをクランプできる。また、支持機構の構成を簡単化することができる。 According to the invention of claim 2, the workpiece is supported on the seating surface, the grip member and the tapered shaft portion are inserted into the hole, and the grip member is supported by the annular pressure receiving member and the support member that are biased upward by fluid pressure. In this state, the workpiece can be clamped by driving the clamp rod downward to drive the grip member into the wall surface of the hole and then driving the clamp rod downward. In addition, the structure of the support mechanism can be simplified.
請求項3の発明によれば、流体圧シリンダのピストン部材のロッド部を小径化して、本体筒部を小径化することが可能になる。
請求項4の発明によれば、T形係合凹部の製作と、クランプロッドのT形係合部のT形係合凹部への組み付けの面で有利である。
According to invention of Claim 3, it becomes possible to reduce the diameter of the rod part of the piston member of a fluid pressure cylinder, and to reduce the diameter of a main body cylinder part.
According to the invention of claim 4, it is advantageous in terms of manufacturing the T-shaped engaging recess and assembling the T-shaped engaging portion of the clamp rod to the T-shaped engaging recess.
請求項5の発明によれば、クランプ用流体作動室の流体圧により環状受圧部材を常時上方へ付勢してサポート部材でもってグリップ部材をサポートすることができる。
請求項6の発明によれば、環状受圧部材の上限位置と下限位置を規定することができる。請求項7の発明によれば、下限位置にある環状受圧部材で外周側分割体の下端を受け止めることにより、クランプロッドの下限位置を規定するため、クランプロッドを下限位置に受け止めるストッパ部材を本体部材に設ける必要がない。
According to the fifth aspect of the present invention, the gripping member can be supported by the support member by always biasing the annular pressure receiving member upward by the fluid pressure of the fluid working chamber for clamping.
According to the invention of claim 6, the upper limit position and the lower limit position of the annular pressure receiving member can be defined. According to the seventh aspect of the present invention, the body member is provided with the stopper member for receiving the clamp rod at the lower limit position in order to define the lower limit position of the clamp rod by receiving the lower end of the outer circumferential side divided body with the annular pressure receiving member at the lower limit position. There is no need to provide it.
請求項8の発明によれば、サポート部材が環状受圧部材から分割した形に構成されたため、請求項7のような構成が可能になった。
請求項9の発明によれば、ワークのクランプ対象の穴の大きさや位置に製作誤差がある場合にも、グリップ部材を穴の壁面に食い付くかせることができる。
According to the invention of claim 8, since the support member is configured to be divided from the annular pressure receiving member, the structure as in claim 7 can be realized.
According to the ninth aspect of the present invention, even when there is a manufacturing error in the size or position of the hole to be clamped of the workpiece, the grip member can bite into the wall surface of the hole.
請求項10の発明によれば、アンクランプ状態のとき、弾性付勢手段により、グリップ部材とクランプロッドの軸心が流体圧シリンダの軸心に一致するように復帰する。
請求項11の発明によれば、作動確認手段により、環状受圧部材が上限位置及び下限位置にある状態を検出できるため、グリップ部材と環状受圧部材が上限位置になったアンクランプ状態を確認でき、クランプ時にグリップ部材がワークの穴の壁面をグリップしないでグリップ部材と環状受圧部材が下限位置になった状態を確認することができる。
According to the tenth aspect of the present invention, in the unclamped state, the elastic urging means returns the axis of the grip member and the clamp rod so as to coincide with the axis of the fluid pressure cylinder.
According to the invention of claim 11, since the operation confirmation means can detect the state where the annular pressure receiving member is at the upper limit position and the lower limit position, the unclamped state where the grip member and the annular pressure receiving member are at the upper limit position can be confirmed, It is possible to confirm that the grip member and the annular pressure receiving member are at the lower limit position without clamping the wall surface of the hole of the workpiece during clamping.
請求項12の発明によれば、クランプ対象の穴の付近に凸部や凹部や段付き部がある場合にも、本体筒部を凸部の間に挿入したり、凹部に挿入したりしてクランプ対象の穴をグリップ部材とクランプロッドのテーパ軸部とでクランプすることができる。クランプ装置の使い勝手が改善され、クランプ装置の汎用性を格段に高めることができる。尚、クランプ対象の穴の付近に凸部や凹部や段付き部のないワークをクランプする上でも何ら支障はない。
請求項13の発明によれば、第1,第2検知手段により、支持機構が上限位置及び下限位置にある状態を検出できるため、支持機構が上限位置になったアンクランプ状態と、支持機構が下限位置になったクランプミス状態とを確認することができる。
According to the invention of claim 12, even when there is a convex part, a concave part or a stepped part near the hole to be clamped, the main body cylinder part is inserted between the convex parts or inserted into the concave part. The hole to be clamped can be clamped by the grip member and the tapered shaft portion of the clamp rod. The usability of the clamping device is improved, and the versatility of the clamping device can be greatly enhanced. It should be noted that there is no problem in clamping a workpiece having no convex portion, concave portion or stepped portion in the vicinity of the hole to be clamped.
According to the invention of claim 13, since the first and second detection means can detect the state where the support mechanism is at the upper limit position and the lower limit position, the unclamped state where the support mechanism is at the upper limit position, and the support mechanism It can be confirmed that the clamp is in the lower limit position.
以下、本発明を実施するための最良の形態について、実施例に基づいて説明する。 Hereinafter, the best mode for carrying out the present invention will be described based on examples.
図1〜図4に示すように、このクランプ装置Cは、本体部材1と、ワークWを固定するためのクランプ部材であるグリップ部材2と、クランプロッド3と、グリップ部材2とクランプロッド3を軸心方向(上下方向)に駆動可能な油圧シリンダ4と、油圧シリンダ4に含まれる環状受圧部材5及びサポート部材6とを備えている。前記本体部材1は、 上部本体部材11と下部本体部材12とを備え、このクランプ装置Cは、基部本体部材13に組付けられて使用される。 As shown in FIGS. 1 to 4, the clamp device C includes a main body member 1, a grip member 2 that is a clamp member for fixing the workpiece W, a clamp rod 3, a grip member 2, and a clamp rod 3. A hydraulic cylinder 4 that can be driven in the axial direction (vertical direction), and an annular pressure receiving member 5 and a support member 6 included in the hydraulic cylinder 4 are provided. The main body member 1 includes an upper main body member 11 and a lower main body member 12, and the clamping device C is used by being assembled to a base main body member 13.
上部本体部材11は平面視にてほぼ長円形であり、この上部本体部材11は4つのボルト穴9に挿入される4つのボルトで基部本体部材13に固定される。下部本体部材12はシリンダ穴44を形成する筒状部材であり、この下部本体部材12の上端部が上部本体部材11の下面側の凹部15に嵌合され、4つのボルト16により上部本体部材11に固定されている。 The upper body member 11 is substantially oval in plan view, and the upper body member 11 is fixed to the base body member 13 with four bolts inserted into the four bolt holes 9. The lower main body member 12 is a cylindrical member that forms a cylinder hole 44, and the upper end portion of the lower main body member 12 is fitted into the concave portion 15 on the lower surface side of the upper main body member 11, and the upper main body member 11 is secured by four bolts 16. It is fixed to.
前記本体部材1の上半部の中心部に上方へ突出する円筒状の本体筒部11aであって、アンクランプ状態のときのグリップ部材2の外径の3倍以下の外径を有する本体筒部11aが設けられている。アンクランプ状態のとき、グリップ部材2の上半部とクランプロッド3のテーパ軸部31が本体筒部11aの上端外へ突出するように構成されている。
ここで、本体筒部11aの外径は、アンクランプ状態のときのグリップ部材2の外径の1.8〜3.0倍の範囲に設定することが望ましく、本実施例の本体筒部11aの外径は、アンクランプ状態のときのグリップ部材2の外径の2.6倍に設定してある。
A cylindrical main body cylinder portion 11a that protrudes upward at the center of the upper half of the main body member 1 and has an outer diameter that is not more than three times the outer diameter of the grip member 2 in the unclamped state. A portion 11a is provided. When in the unclamped state, the upper half portion of the grip member 2 and the tapered shaft portion 31 of the clamp rod 3 are configured to protrude outside the upper end of the main body cylinder portion 11a.
Here, the outer diameter of the main body cylinder portion 11a is preferably set in a range of 1.8 to 3.0 times the outer diameter of the grip member 2 in the unclamped state, and the main body cylinder portion 11a of the present embodiment. Is set to 2.6 times the outer diameter of the grip member 2 in the unclamped state.
図1〜図4に示すように、前記グリップ部材2は、本体筒部11aの上端部の中心部分の開口穴17を上下に貫通している。本体筒部11aの上面には、グリップ部材2を囲む4つの円弧状の着座面18が形成され、これら着座面18にワークWを着座させた状態で、ワークWをクランプすることができる。本体筒部11aの上面には、加圧エアのエアブロー流が流れる4つの凹溝19が十文字状に形成されている。 As shown in FIGS. 1-4, the said grip member 2 has penetrated the opening hole 17 of the center part of the upper end part of the main body cylinder part 11a up and down. Four arcuate seating surfaces 18 surrounding the grip member 2 are formed on the upper surface of the main body cylinder portion 11a, and the workpiece W can be clamped in a state where the workpiece W is seated on the seating surface 18. Four concave grooves 19 through which an air blow flow of pressurized air flows are formed in a cross shape on the upper surface of the main body cylinder portion 11a.
グリップ部材2は、ワークWの穴Hに下方から挿入されて穴Hの内周面をグリップ可能なものである。このグリップ部材2は、ロッド挿通孔21と、グリップ爪部22と、基端鍔部23とを備えている。グリップ部材2は、4つのスリット( 図示略) により4等分に分割され、4つの分割体により環状に形成されている。 The grip member 2 is inserted into the hole H of the workpiece W from below and can grip the inner peripheral surface of the hole H. The grip member 2 includes a rod insertion hole 21, a grip claw portion 22, and a proximal end flange portion 23. The grip member 2 is divided into four equal parts by four slits (not shown), and is formed in an annular shape by four divided bodies.
金属製のグリップ部材2におけるグリップ爪部22の外周面には、ワークWの穴Hの内周面をグリップし易くする3段の歯22aが形成されている。グリップ部材2のロッド挿通孔21にはクランプロッド3が挿通されている。このロッド挿通孔21のうちのグリップ爪部対応部分は、クランプロッド3のテーパ軸部31が密着状に係合するテーパ孔部21aに形成されている。 On the outer peripheral surface of the grip claw portion 22 in the metal grip member 2, three-stage teeth 22a that make it easy to grip the inner peripheral surface of the hole H of the workpiece W are formed. The clamp rod 3 is inserted into the rod insertion hole 21 of the grip member 2. A portion corresponding to the grip claw portion of the rod insertion hole 21 is formed in a tapered hole portion 21a in which the tapered shaft portion 31 of the clamp rod 3 is engaged in close contact.
図1〜図4に示すように、本体筒部11aの上端の開口穴17にはグリップ部材2の外周面に摺接する弾性材料(ゴムや合成樹脂)製のスクレーパ28(弾性付勢手段)が装着されている。このスクレーパ28は、異物の侵入を防止する機能と、アンクランプ状態のときグリップ部材2とクランプロッド3の軸心が油圧シリンダ4の軸心と一致するようにセンタリングする機能とを得る為のものである。また、グリップ部材2の下部には4つの分割体を縮径方向へ付勢するOリング29が装着されている。 As shown in FIGS. 1 to 4, a scraper 28 (elastic urging means) made of an elastic material (rubber or synthetic resin) slidably contacting the outer peripheral surface of the grip member 2 is provided in the opening hole 17 at the upper end of the main body cylinder portion 11 a. It is installed. The scraper 28 has a function of preventing the intrusion of foreign matter and a function of centering so that the axes of the grip member 2 and the clamp rod 3 coincide with the axes of the hydraulic cylinder 4 in an unclamped state. It is. Further, an O-ring 29 for urging the four divided bodies in the diameter reducing direction is attached to the lower part of the grip member 2.
グリップ部材2の基端鍔部23は本体筒部11aの円形凹部25に収容され、基端鍔部23の外周側には隙間26が形成されている。グリップ部材2の基端鍔部23は、円形凹部25の上壁部とサポート部材6の水平板部62との間に水平方向へ可動に挟着され、サポート部材6で支持されている。グリップ部材2は、サポート部材6及び環状受圧部材5と一体的にグリップ部材2の上限位置から下限位置に亙って昇降可能であると共に、円形凹部25の外周部の環状隙間26とスクレーパ28の弾性変形を介して、油圧シリンダ4の軸心と直交する水平方向へ移動可能に装着されている。それ故、ワークWをクランプする際、クランプ対象の穴Hの軸心がクランプ装置Cの軸心(油圧シリンダ4の軸心)からズレている場合に、そのズレを吸収してクランプすることができる。 The proximal end flange 23 of the grip member 2 is accommodated in a circular recess 25 of the main body cylinder portion 11a, and a gap 26 is formed on the outer peripheral side of the proximal end flange 23. The proximal end flange portion 23 of the grip member 2 is movably sandwiched between the upper wall portion of the circular recess 25 and the horizontal plate portion 62 of the support member 6 and supported by the support member 6. The grip member 2 can be moved up and down integrally with the support member 6 and the annular pressure receiving member 5 from the upper limit position to the lower limit position of the grip member 2, and the annular gap 26 on the outer peripheral portion of the circular recess 25 and the scraper 28. It is mounted so as to be movable in the horizontal direction perpendicular to the axis of the hydraulic cylinder 4 through elastic deformation. Therefore, when the workpiece W is clamped, if the axis of the hole H to be clamped is displaced from the axis of the clamping device C (the axis of the hydraulic cylinder 4), the deviation can be absorbed and clamped. it can.
クランプロッド3は、テーパ軸部31と、このテーパ軸部31の下端に連なる小径ロッド部32と、この小径ロッド部32の下端に連なるT形係合部33とで構成されている。 テーパ軸部31と小径ロッド部32とがグリップ部材2のロッド挿通孔21に挿通されている。上記テーパ軸部31は上方程大径化するようにクランプロッド3の上端部分に形成され、テーパ軸部31がグリップ部材2のテーパ孔部21aに可動に内嵌係合されている。 The clamp rod 3 includes a tapered shaft portion 31, a small-diameter rod portion 32 that is continuous with the lower end of the tapered shaft portion 31, and a T-shaped engaging portion 33 that is continuous with the lower end of the small-diameter rod portion 32. The tapered shaft portion 31 and the small diameter rod portion 32 are inserted into the rod insertion hole 21 of the grip member 2. The taper shaft portion 31 is formed at the upper end portion of the clamp rod 3 so as to increase in diameter upward, and the taper shaft portion 31 is movably fitted and engaged with the taper hole portion 21 a of the grip member 2.
図2〜図8に示すように、前記油圧シリンダ4は、グリップ部材2とクランプロッド3とを軸心方向へ進退駆動する為のものである。この油圧シリンダ4は、ピストン部材41と、環状受圧部材5の下端に油圧を作用させるクランプ用油室42(環状作動室)と、アンクランプ用油室43と、環状受圧部材5などを備えている。ピストン部材41は、立向きのシリンダ穴44に昇降自在に装着されたピストン部45と、このピストン部45の上端から上方へ本体筒部11a内まで延びるロッド部46とを有する。ピストン部45にはシール部材45aが装着されている。ロッド部46の上端部分には、クランプロッド3のT形係合部33が水平方向側方から係合可能なT形係合凹部47が形成されている。 As shown in FIGS. 2 to 8, the hydraulic cylinder 4 is for driving the grip member 2 and the clamp rod 3 forward and backward in the axial direction. The hydraulic cylinder 4 includes a piston member 41, a clamping oil chamber 42 (annular working chamber) that applies hydraulic pressure to the lower end of the annular pressure receiving member 5, an unclamping oil chamber 43, and the annular pressure receiving member 5. Yes. The piston member 41 includes a piston portion 45 that is mounted in an upright cylinder hole 44 so as to freely move up and down, and a rod portion 46 that extends upward from the upper end of the piston portion 45 into the main body cylinder portion 11a. A seal member 45 a is attached to the piston portion 45. At the upper end portion of the rod portion 46, a T-shaped engaging recess 47 is formed in which the T-shaped engaging portion 33 of the clamp rod 3 can be engaged from the horizontal side.
ロッド部41の上半部の上端部分と外周側部分はT形係合凹部47を形成する外周側分割体48に形成され、ロッド部46の上半部の中心側部分にネジ軸部49が形成され、外周側分割体48の下半部がネジ軸部49に螺合されている。外周側分割体48の外径は、ロッド部46の下部の外径よりも僅かに大きく形成され、外周側分割体48の下端には、環状受圧部材5の後述する薄肉スリーブ53の上端で係止される被係止部48aが形成されている。 The upper end portion and the outer peripheral side portion of the upper half portion of the rod portion 41 are formed in the outer peripheral side divided body 48 that forms the T-shaped engaging recess 47, and the screw shaft portion 49 is provided at the center side portion of the upper half portion of the rod portion 46. The lower half portion of the outer peripheral side divided body 48 is screwed to the screw shaft portion 49. The outer diameter of the outer divided body 48 is slightly larger than the outer diameter of the lower portion of the rod portion 46, and the lower end of the outer divided body 48 is engaged with the upper end of a thin sleeve 53 described later of the annular pressure receiving member 5. A locked portion 48a to be stopped is formed.
前記クランプロッド3のT形係合部33をT形係合凹部47に装着するとき、図5〜図8(特に図6,図7)に示すように、外周側分割体48のネジ軸部49に対する螺合を例えば約2〜3mmだけ上方へ緩めた状態にして、水平方向側方からT形係合部33をT形係合凹部47に装着し、その後外周側分割体48をネジ軸部49に対して完全に螺合させると、図2〜図4に示す状態になる。この状態では、ピストン部材41とクランプロッド3とが夫々の上限位置から下限位置に亙って一体的に昇降移動する。 When the T-shaped engaging portion 33 of the clamp rod 3 is mounted in the T-shaped engaging concave portion 47, as shown in FIGS. 5 to 8 (particularly FIGS. 6 and 7), the screw shaft portion of the outer peripheral side divided body 48 is provided. 49 is loosened upward by, for example, about 2 to 3 mm, and the T-shaped engaging portion 33 is attached to the T-shaped engaging concave portion 47 from the horizontal side, and then the outer peripheral side divided body 48 is attached to the screw shaft. When completely screwed to the portion 49, the state shown in FIGS. In this state, the piston member 41 and the clamp rod 3 integrally move up and down from the upper limit position to the lower limit position.
ここで、T形係合部33と外周側分割体48の間には、例えば約0.5〜1mm位の隙間が形成されていて、クランプロッド3は、T形係合凹部47に対して相対的に水平方向へ上記の隙間の分だけ移動可能である。尚、外周側分割体48の上端の開口部47aの幅は、クランプロッド3のテーパ軸部31よりも小さい。
クランプ用油室42はピストン部45の上側に形成され、アンクランプ用油室43はピストン部45の下側に下部本体部材12と基部本体部材13とで形成されている。
Here, a gap of about 0.5 to 1 mm, for example, is formed between the T-shaped engaging portion 33 and the outer peripheral side divided body 48, and the clamp rod 3 is located with respect to the T-shaped engaging recess 47. It can be moved in the horizontal direction by the gap. In addition, the width of the opening 47 a at the upper end of the outer peripheral side divided body 48 is smaller than the tapered shaft portion 31 of the clamp rod 3.
The clamping oil chamber 42 is formed on the upper side of the piston portion 45, and the unclamping oil chamber 43 is formed on the lower side of the piston portion 45 with the lower body member 12 and the base body member 13.
環状受圧部材5は、筒状ピストン51と、この筒状ピストン51の上端部の係止鍔部52と、この係止鍔部52の上端の内周部から上方へ所定長さ延びる薄肉スリーブ53とで構成されている。環状受圧部材5の筒状ピストン51はロッド部46に摺動自在に外嵌され且つ下部本体部材12の円筒穴12aに摺動自在に内嵌されている。環状受圧部材5とロッド部46の間はシール部材5aでシールされ、筒状ピストン51の外周部にはシール部材5bが装着されている。
図2に示すアンクランプ状態において、薄肉スリーブ53の上端と外周側分割体48の被係止部48aとの間には、例えば約3〜4mmの隙間G1が、「グリップ部材拡径用ストローク」として形成されている。隙間G1が最大(ストロークが零)のとき、グリップ部材2と環状受圧部材5(クランプロッド3)が上限位置に位置し、隙間G1が最小(ストロークが最大)のとき、グリップ部材2と環状受圧部材5が下限位置に位置している。
以上により、環状受圧部材5とサポート部材6とクランプ用油室42とが、油圧シリンダ4によりクランプロッド3をグリップ部材2に対して下方へ相対移動させてグリップ部材2を拡径させる際にグリップ部材2を上限位置に支持可能な支持機構に相当する。
The annular pressure receiving member 5 includes a cylindrical piston 51, a locking flange 52 at the upper end of the cylindrical piston 51, and a thin sleeve 53 extending upward for a predetermined length from the inner peripheral portion of the upper end of the locking flange 52. It consists of and. The cylindrical piston 51 of the annular pressure receiving member 5 is slidably fitted to the rod portion 46 and slidably fitted to the cylindrical hole 12 a of the lower body member 12. A space between the annular pressure receiving member 5 and the rod portion 46 is sealed with a seal member 5 a, and a seal member 5 b is attached to the outer peripheral portion of the cylindrical piston 51.
In the unclamped state shown in FIG. 2, for example, a gap G <b> 1 of about 3 to 4 mm is formed between the upper end of the thin sleeve 53 and the locked portion 48 a of the outer peripheral side divided body 48, as “grip member diameter increasing stroke”. It is formed as. When the gap G1 is maximum (the stroke is zero), the grip member 2 and the annular pressure receiving member 5 (clamp rod 3) are positioned at the upper limit position, and when the gap G1 is minimum (the stroke is maximum), the grip member 2 and the annular pressure receiving pressure The member 5 is located at the lower limit position.
As described above, the annular pressure receiving member 5, the support member 6, and the clamping oil chamber 42 are gripped when the gripping member 2 is expanded in diameter by moving the clamping rod 3 downward relative to the gripping member 2 by the hydraulic cylinder 4. This corresponds to a support mechanism capable of supporting the member 2 at the upper limit position.
環状受圧部材5の係止鍔部52は、上部本体部材11と下部本体部材12とで形成された収容穴14に上下方向へ例えば約2mm昇降可能に装着されている。係止鍔部52を収容穴14の下端壁14bで係止することで環状受圧部材5の下限位置が規定され、係止鍔部52を収容穴14の上端壁14aで係止することで環状受圧部材5の上限位置が規定される。上記の約2mmの隙間G2が、グリップ後においてクランプの為の最大「引き込みストローク」である。但し、クランプ時の実際の引き込みストロークは約0.5〜1.0mm位である。 The locking collar portion 52 of the annular pressure receiving member 5 is attached to the accommodation hole 14 formed by the upper main body member 11 and the lower main body member 12 so as to be able to move up and down by about 2 mm, for example. The lower limit position of the annular pressure receiving member 5 is defined by locking the locking collar 52 with the lower end wall 14b of the receiving hole 14, and the annular pressure receiving section 52 is locked with the upper end wall 14a of the receiving hole 14. An upper limit position of the pressure receiving member 5 is defined. The gap G2 of about 2 mm is the maximum “retraction stroke” for clamping after gripping. However, the actual retraction stroke at the time of clamping is about 0.5 to 1.0 mm.
前記サポート部材6は、薄肉スリーブ53とロッド部46に外嵌された薄肉筒部61と、この薄肉筒部61の上端の水平板部62とで構成されている。クランプロッド3は水平板部62の穴63を貫通しているが、この穴63はクランプロッド3を通過可能な大きさに形成されている。サポート部材6の上端の水平板部62がグリップ部材2の基端鍔部23の下面に当接して支持し、薄肉筒部61の下端は環状受圧部材5の上端に当接して支持され、サポート部材6は環状受圧部材5と一体的に昇降するようになっている。 The support member 6 includes a thin sleeve 53, a thin cylindrical portion 61 fitted on the rod portion 46, and a horizontal plate portion 62 at the upper end of the thin cylindrical portion 61. The clamp rod 3 passes through the hole 63 of the horizontal plate portion 62, and the hole 63 is formed to have a size that can pass through the clamp rod 3. The horizontal plate portion 62 at the upper end of the support member 6 is in contact with and supported by the lower surface of the base end flange portion 23 of the grip member 2, and the lower end of the thin tube portion 61 is in contact with and supported by the upper end of the annular pressure receiving member 5. The member 6 is moved up and down integrally with the annular pressure receiving member 5.
上記環状受圧部材5の下端は、クランプ用油圧室42に臨んでその油圧を受圧する。クランプ用油室42は、油路70〜73を介して油圧供給源に接続され、油路73の油圧を検出する油圧検出センサ74も設けられている。アンクランプ用油室43は、油路75を介して油圧供給源に接続され、油路75の油圧を検出する油圧検出センサ76が設けられている。 The lower end of the annular pressure receiving member 5 faces the clamping hydraulic chamber 42 and receives the hydraulic pressure. The clamping oil chamber 42 is connected to a hydraulic pressure supply source via oil paths 70 to 73, and a hydraulic pressure detection sensor 74 that detects the hydraulic pressure of the oil path 73 is also provided. The unclamping oil chamber 43 is connected to a hydraulic pressure supply source via an oil passage 75 and is provided with a hydraulic pressure detection sensor 76 that detects the oil pressure of the oil passage 75.
図1〜図4に示すように、ワークWをクランプした状態で、ワークWの下面が着座面18に密着したことを検出する着座検出手段(図示略)も設けられている。この着座検出手段は、着座面18に開口された加圧エア噴出孔と、この加圧エア噴出孔に連通するように本体部材1や基部本体部材13に形成されたエア通路と、このエア通路を加圧エア供給源に接続するエア通路と、このエア通路内の加圧エアの圧力が設定圧以上に昇圧したことを検出する圧力スイッチなどで構成されている。 As shown in FIGS. 1 to 4, seating detection means (not shown) for detecting that the lower surface of the workpiece W is in close contact with the seating surface 18 in a state where the workpiece W is clamped is also provided. The seating detection means includes a pressurized air ejection hole opened in the seating surface 18, an air passage formed in the main body member 1 and the base body member 13 so as to communicate with the pressurized air ejection hole, and the air passage. Are connected to a pressurized air supply source, and a pressure switch for detecting that the pressure of the pressurized air in the air passage has increased to a set pressure or higher.
図9に示すように、基部本体部材13に形成されたエア通路78と上部本体部材11に形成されたエア通路77から本体筒部11aとサポート部材6の間の隙間に加圧エアが供給され、その加圧エアがグリップ部材2の基端鍔部23の外周側の隙間26へ流れ、グリップ部材2の4つのスリットから4つの着座面18及び凹溝19の方へ流れ、4つの着座面18をエアブローし、これら着座面18をクリーンにする。 As shown in FIG. 9, pressurized air is supplied from the air passage 78 formed in the base main body member 13 and the air passage 77 formed in the upper main body member 11 to the gap between the main body cylinder portion 11 a and the support member 6. The pressurized air flows into the gap 26 on the outer peripheral side of the proximal end flange 23 of the grip member 2, flows from the four slits of the grip member 2 toward the four seating surfaces 18 and the recessed grooves 19, and four seating surfaces. 18 is air blown to clean these seating surfaces 18.
次に、作動確認機構80について説明する。
図10に示すように、前記作動確認機構80は、環状受圧部材5が上限位置及び下限位置にある状態を検出するものである。この作動確認機構80は、収容室14の下端壁14bに係止鍔部52に対向状に開口されたエア噴出孔81と、このエア噴出孔81に加圧エアを供給するエア通路82〜85と、このエア通路85内のエア圧の高低を検出する圧力スイッチ86とを有する。
Next, the operation confirmation mechanism 80 will be described.
As shown in FIG. 10, the operation confirmation mechanism 80 detects a state in which the annular pressure receiving member 5 is at the upper limit position and the lower limit position. The operation confirmation mechanism 80 includes an air ejection hole 81 that is opened on the lower end wall 14 b of the storage chamber 14 so as to face the locking collar 52, and air passages 82 to 85 that supply pressurized air to the air ejection hole 81. And a pressure switch 86 for detecting the level of the air pressure in the air passage 85.
エア通路82は下部本体部材12に形成されてエア噴出孔81に連通している。エア通路83,84は上部本体部材11に形成されてエア通路82に連通している。エア通路85は基部本体部材13に形成されてエア通路84に連通している。 The air passage 82 is formed in the lower main body member 12 and communicates with the air ejection hole 81. The air passages 83 and 84 are formed in the upper body member 11 and communicate with the air passage 82. The air passage 85 is formed in the base body member 13 and communicates with the air passage 84.
図5に示すように、ピストン部材41と環状受圧部材5とが下限位置にあるとき、係止鍔部52が下端壁14bに当接してエア噴出孔81を塞ぐため圧力スイッチ86によりエア圧「高」が検出される。図4に示すように、係止鍔部52が下端壁14bにも上端壁14aにも当接していない状態においては、エア噴出孔81から収容室14に供給された加圧エアは係止鍔部52の外周側の隙間を通って環状受圧部材5の上側へリークするため、圧力スイッチ86によりエア圧「低」が検出される。図2,図3に示すように、ピストン部材41と環状受圧部材5とが上限位置にあるとき、係止鍔部52が上端壁14aに当接してエア通路が遮断されるため圧力スイッチ86によりエア圧「高」が検出される。尚、油圧供給源、エア供給源、センサ類は図示外の制御ユニットに電気的に接続されており、その制御ユニットにより制御される。 As shown in FIG. 5, when the piston member 41 and the annular pressure receiving member 5 are at the lower limit position, the locking switch 52 abuts the lower end wall 14 b and closes the air ejection hole 81, so that the air pressure “ High is detected. As shown in FIG. 4, in a state where the locking collar 52 is not in contact with the lower end wall 14 b or the upper end wall 14 a, the pressurized air supplied from the air ejection hole 81 to the storage chamber 14 is Since air leaks to the upper side of the annular pressure receiving member 5 through the gap on the outer peripheral side of the portion 52, the air pressure “low” is detected by the pressure switch 86. As shown in FIGS. 2 and 3, when the piston member 41 and the annular pressure receiving member 5 are at the upper limit position, the locking flange 52 abuts the upper end wall 14 a and the air passage is blocked, so that the pressure switch 86 Air pressure “high” is detected. The hydraulic pressure supply source, air supply source, and sensors are electrically connected to a control unit (not shown) and are controlled by the control unit.
以上のクランプ装置Cの作用、効果について説明する。
クランプ装置CによりワークWを固定する場合、先ず最初に、クランプ用油室42とアンクランプ用油室43にほぼ同圧の油圧を供給する。すると、ピストン部材41におけるクランプ用油室42の受圧面積よりもアンクランプ用油室43の受圧面積の方が大きいため、図2に示すように、ピストン部材41は上限位置まで上昇して停止状態となる。また、環状受圧部材5がクランプ用油室42の油圧を受圧するため、環状受圧部材5とサポート部材6は上限位置になり、グリップ部材2及びクランプロッド3が上限位置になる。
The operation and effect of the clamping device C will be described.
When the workpiece W is fixed by the clamping device C, first, substantially the same hydraulic pressure is supplied to the clamping oil chamber 42 and the unclamping oil chamber 43. Then, since the pressure receiving area of the unclamping oil chamber 43 is larger than the pressure receiving area of the clamping oil chamber 42 in the piston member 41, the piston member 41 is raised to the upper limit position and stopped as shown in FIG. It becomes. Further, since the annular pressure receiving member 5 receives the hydraulic pressure of the clamping oil chamber 42, the annular pressure receiving member 5 and the support member 6 are in the upper limit position, and the grip member 2 and the clamp rod 3 are in the upper limit position.
この状態において、ワークWを投入して、図2に示すように、ワークWの穴Hにグリップ部材2とクランプロッド3のテーパ軸部31とを挿入し、ワークWを着座面18で支持する。次に、アンクランプ用油室43の油圧をクランプ用油室42の油圧よりも低い所定の油圧に切換え、ピストン部材41に下方向きの所定の油圧力を作用させる。
すると、クランプ用油室42の油圧を受圧する環状受圧部材5は、前記と同様に上限位置を保持し、グリップ部材2も上限位置を保持するが、ピストン部材41には下方向きの油圧力が作用し、ピストン部材41が隙間G1の範囲内で下方へ駆動されるため、クランプロッド3がグリップ部材2に対して相対的に下方へ移動する。
In this state, the workpiece W is loaded, and the grip member 2 and the taper shaft portion 31 of the clamp rod 3 are inserted into the hole H of the workpiece W, and the workpiece W is supported by the seating surface 18 as shown in FIG. . Next, the hydraulic pressure in the unclamping oil chamber 43 is switched to a predetermined hydraulic pressure lower than the hydraulic pressure in the clamping oil chamber 42, and a predetermined downward oil pressure is applied to the piston member 41.
Then, the annular pressure receiving member 5 that receives the hydraulic pressure of the clamping oil chamber 42 holds the upper limit position as described above, and the grip member 2 also holds the upper limit position. However, the piston member 41 has a downward hydraulic pressure. Since the piston member 41 is actuated and driven downward within the gap G <b> 1, the clamp rod 3 moves relative to the grip member 2.
その結果、クランプロッド3のテーパ軸部31によりグリップ部材2のグリップ爪部22が拡径駆動されて、ワークWの穴Hの内周面に食いついて係合(グリップ)状態になる。この状態において、ピストン部材41は停止状態になる。次に、クランプ作動のため、アンクランプ用油室43の油圧をドレン圧まで低下させると、ピストン部材41には下方向きの大きな油圧力が作用し、グリップ部材2とクランプロッド3とは相対移動不能になっているため、ピストン部材42とグリップ部材2とクランプロッド3と環状受圧部材5は一体的に下方へ僅かに駆動され、ワークWが着座面18に強く押圧されたクランプ状態になって停止する。 As a result, the grip claw portion 22 of the grip member 2 is driven to expand in diameter by the taper shaft portion 31 of the clamp rod 3, and is engaged with the inner peripheral surface of the hole H of the workpiece W to be in an engaged (grip) state. In this state, the piston member 41 is stopped. Next, when the hydraulic pressure in the unclamping oil chamber 43 is lowered to the drain pressure for the clamping operation, a large downward hydraulic pressure acts on the piston member 41, and the grip member 2 and the clamp rod 3 move relative to each other. Since the piston member 42, the grip member 2, the clamp rod 3, and the annular pressure receiving member 5 are slightly driven downward integrally, the workpiece W is strongly clamped against the seating surface 18. Stop.
クランプ装置Cによれば、上限位置に支持されたグリップ部材2に対してクランプロッド3を確実に下方へ相対移動できるため、ワークWの穴Hに対するグリップ性能を高くすることができる。グリップ部材2を上限位置に支持可能な支持機構が、クランプロッド3のグリップ部材2に対する相対移動の最大ストロークを制限するため、スリップ状態やクランプミス状態が発生したときでも、クランプロッド3が下限位置まで移動されることを防止することができ、グリップ部材2の過剰な拡径を防止することができる。
これにより、グリップ部材2の外周面をシールするスクレーパ28を備えたクランプ装置Cであっても、簡単な構造でスクレーパ28の損傷を防止することができる。
また、正常クランプ時には、図4に示すように、係止鍔部52と収容室14の下端壁14bとの間には隙間が残っており、係止鍔部52と収容室14の上端壁14aとの間には隙間が残っているため、作動確認機構80の圧力スイッチ86によりエア圧「低」が検出され、ワークWが正常にクランプされたことを確認することができる。
According to the clamping device C, the clamp rod 3 can be reliably moved downward relative to the grip member 2 supported at the upper limit position, so that the grip performance with respect to the hole H of the workpiece W can be enhanced. Since the support mechanism capable of supporting the grip member 2 at the upper limit position limits the maximum stroke of the relative movement of the clamp rod 3 with respect to the grip member 2, the clamp rod 3 can be moved to the lower limit position even when a slip state or a clamp error state occurs. Can be prevented, and excessive diameter expansion of the grip member 2 can be prevented.
Thereby, even if it is the clamp apparatus C provided with the scraper 28 which seals the outer peripheral surface of the grip member 2, damage to the scraper 28 can be prevented with a simple structure.
Further, at the time of normal clamping, as shown in FIG. 4, a gap remains between the locking hook 52 and the lower end wall 14b of the storage chamber 14, and the upper end wall 14a of the locking hook 52 and the storage chamber 14 is left. Therefore, it is possible to confirm that the workpiece W has been clamped normally by detecting the air pressure “low” by the pressure switch 86 of the operation confirmation mechanism 80.
ところで、ワークWが鋳造品で、その穴Hが下方程大径化するようなテーパ穴である場合、また、ワークWが硬い金属材料製である場合など、アンクランプ用油室43の油圧をドレン圧にして、ピストン部材41等を下降駆動させ始めた時に、グリップ爪部22が穴Hの内周面から下方へスリップすることがある。 By the way, when the workpiece W is a cast product and the hole H is a tapered hole whose diameter increases toward the lower side, or when the workpiece W is made of a hard metal material, the hydraulic pressure of the unclamping oil chamber 43 is increased. When the drain pressure is applied and the piston member 41 or the like starts to descend, the grip claw portion 22 may slip downward from the inner peripheral surface of the hole H.
この場合、図5に示すように、ピストン部材41及び環状受圧部材5が下限位置まで下降するため、作動確認機構80の圧力スイッチ86によりエア圧「高」が検出され、ワークが正常にクランプされてないことが検知される。このことは、ワークWの穴Hが大き過ぎてグリップ部材2でクランプできない、或いはワークWの穴Hが存在していないような空クランプによるクランプミス状態の場合、ワークWが着座面18から浮いた状態のままクランプした場合にも同様であり、作動確認機構80によりワークWが正常にクランプされてないことを検出することができる。 In this case, as shown in FIG. 5, since the piston member 41 and the annular pressure receiving member 5 are lowered to the lower limit position, the air pressure “high” is detected by the pressure switch 86 of the operation confirmation mechanism 80, and the workpiece is normally clamped. Is detected. This is because the workpiece W is lifted from the seating surface 18 when the hole H of the workpiece W is too large to be clamped by the grip member 2 or when the clamping failure is caused by an empty clamp where the hole H of the workpiece W does not exist. The same applies to the case where the workpiece W is clamped in a state where the workpiece W is clamped, and the operation confirmation mechanism 80 can detect that the workpiece W is not clamped normally.
以上により、作動確認機構80によって支持機構である環状受圧部材5が上限位置及び下限位置にある状態を検出できるため、支持機構が上限位置になったアンクランプ状態と、支持機構が下限位置になったクランプミス状態とを確認することができる。
尚、クランプ正常やクランプミスを、圧力スイッチ86の検出信号を用いて判定する場合に、圧力検出センサ76で検出されるアンクランプ油室43の油圧の情報と組み合わせて判定する場合もある。
As described above, the operation confirmation mechanism 80 can detect the state where the annular pressure receiving member 5 that is the support mechanism is at the upper limit position and the lower limit position, so that the support mechanism is in the unclamped state and the support mechanism is at the lower limit position. It is possible to confirm that the clamp has been missed.
It should be noted that when determining whether the clamp is normal or incomplete using the detection signal of the pressure switch 86, it may be determined in combination with the hydraulic pressure information of the unclamping oil chamber 43 detected by the pressure detection sensor 76.
複数のクランプ装置CでワークWをクランプするような場合、個々のワークWの製作誤差によりワークWの穴Hの中心の位置が僅かにズレている場合には、クランプロッド3とグリップ部材2を穴Hに挿入したとき、又はクランプしたとき、スクレーパ28の弾性変形を介して、クランプロッド3とグリップ部材2の軸心が、油圧シリンダ4の軸心からズレることなる。しかし、ワークWの機械加工後に、クランプ装置Cをアンクランプ状態に復帰させると、スクレーパ28の弾性力により、クランプロッド3とグリップ部材2の軸心が、油圧シリンダ4の軸心と一致するように自動的に復帰する。 When the workpiece W is clamped by a plurality of clamping devices C, when the position of the center of the hole H of the workpiece W is slightly shifted due to the manufacturing error of each workpiece W, the clamp rod 3 and the grip member 2 are moved. When inserted into the hole H or clamped, the axis of the clamp rod 3 and the grip member 2 is displaced from the axis of the hydraulic cylinder 4 through elastic deformation of the scraper 28. However, when the clamping device C is returned to the unclamped state after machining the workpiece W, the axial centers of the clamp rod 3 and the grip member 2 coincide with the axial center of the hydraulic cylinder 4 due to the elastic force of the scraper 28. Automatically return to
本体筒部11aの外径をD、アンクランプ状態のグリップ部材2の外径をdとしたとき、D=(1.8〜3.0)×dの範囲に設定することが望ましい。D<1.8dにすることは、クランプ装置Cの製作技術上とうてい困難である。D>3.0dになると、クランプ装置CでワークWをクランプする際の使い勝手が悪化する。 It is desirable to set D = (1.8 to 3.0) × d, where D is the outer diameter of the main body cylinder portion 11a and d is the outer diameter of the grip member 2 in the unclamped state. It is very difficult to make D <1.8d in terms of the manufacturing technology of the clamping device C. When D> 3.0d, usability when the workpiece W is clamped by the clamping device C is deteriorated.
例えば、ワークWの外周部のフランジ部の下面に複数のリブが小間隔おきに突設されているような場合に、リブ間のスペースに本体筒部11aを挿入できないため、グリップ部材2とクランプロッド3をワークの穴に挿入できず、ワークをクランプすることができない。或いは、ワークの外周部に形成されたボルト穴をクランプするような場合、ボルト穴の下面側の外周部に座ぐり部がある場合に、本体筒部11aの外径Dが座ぐり部の外径よりも大きいときにはそのボルト穴をクランプすることができない。 For example, when a plurality of ribs protrude from the lower surface of the flange portion of the outer peripheral portion of the workpiece W at small intervals, the main body cylinder portion 11a cannot be inserted into the space between the ribs. The rod 3 cannot be inserted into the hole of the workpiece, and the workpiece cannot be clamped. Or when clamping the bolt hole formed in the outer peripheral part of a workpiece | work, when there is a counterbore part in the outer peripheral part of the lower surface side of a bolt hole, the outer diameter D of the main body cylinder part 11a is outside the counterbore part. When it is larger than the diameter, the bolt hole cannot be clamped.
結局、ワークのクランプ対象の穴の付近に凸部、凹部又は段付き部などがある場合に、これら凸部、凹部又は段付き部と本体部材11aとの干渉を避ける為には、本体筒部11aが極力小径であることが望ましい。 After all, when there are convex portions, concave portions or stepped portions in the vicinity of the hole to be clamped of the workpiece, in order to avoid interference between these convex portions, concave portions or stepped portions and the main body member 11a, the main body cylinder portion 11a is desirably as small as possible.
上記のように本体筒部11aを本体部材1の上半部の中央部に形成し、本体筒部11aの上下方向の長さを本体部材1の全高の約半分の大きさに長く形成し、上記のように本体筒部11aの外径DをD=(1.8〜3.0)×dの範囲に設定するため、クランプ装置Cの使い勝手が改善され、クランプ装置Cの汎用性を格段に高めることができる。
しかも、油圧シリンダ4の軸心と、グリップ部材2及びクランプロッド3の軸心が一致しているため、種々の部品の構造が複雑化せず、クランプ装置Cの製作費を節減できる。
As described above, the main body cylinder portion 11a is formed at the center of the upper half of the main body member 1, and the vertical length of the main body cylinder portion 11a is formed to be approximately half the overall height of the main body member 1, As described above, since the outer diameter D of the main body cylinder portion 11a is set in the range of D = (1.8 to 3.0) × d, the usability of the clamping device C is improved, and the versatility of the clamping device C is markedly improved. Can be increased.
Moreover, since the axis of the hydraulic cylinder 4 and the axes of the grip member 2 and the clamp rod 3 coincide, the structure of various parts is not complicated, and the manufacturing cost of the clamp device C can be reduced.
着座面18にワークWを支持し、グリップ部材2とテーパ軸部31を穴Hに挿入し、油圧で上方へ付勢される環状受圧部材5及びサポート部材6でグリップ部材2を支持した状態で、クランプロッド3を下降駆動してグリップ部材2を穴Hの壁面に食い込ませてから、クランプロッド3を下降駆動することで、ワークWをクランプできる。また、支持機構の構成を簡単化することができる。 The workpiece W is supported on the seating surface 18, the grip member 2 and the tapered shaft portion 31 are inserted into the hole H, and the grip member 2 is supported by the annular pressure receiving member 5 and the support member 6 that are urged upward by hydraulic pressure. The workpiece W can be clamped by driving the clamp rod 3 downward to drive the grip member 2 into the wall surface of the hole H and then driving the clamp rod 3 downward. In addition, the structure of the support mechanism can be simplified.
クランプロッド3の下端部分にT形係合部33を形成し、このT形係合部33をロッド部46の上端部分のT形係合凹部47に水平方向側方から係合可能に構成したため、油圧シリンダ4のピストン部材41のロッド部46を小径化して、本体筒部11aを小径化することが可能になる。 The T-shaped engaging portion 33 is formed at the lower end portion of the clamp rod 3, and the T-shaped engaging portion 33 is configured to be engageable with the T-shaped engaging concave portion 47 at the upper end portion of the rod portion 46 from the lateral side. The diameter of the rod portion 46 of the piston member 41 of the hydraulic cylinder 4 can be reduced, and the diameter of the main body cylinder portion 11a can be reduced.
ロッド部46の上半部の上端部分と外周側部分はT形係合凹部47を形成する外周側分割体48に形成され、ロッド部46の上半部の中心側部分にネジ軸部49が形成され、外周側分割体48の下半部がネジ軸部49に螺合されたため、T形係合凹部47の製作と、クランプロッド3のT形係合部33のT形係合凹部47への組付けの面で有利である。 The upper end portion and the outer peripheral side portion of the upper half portion of the rod portion 46 are formed in an outer peripheral side divided body 48 that forms a T-shaped engaging recess 47, and a screw shaft portion 49 is provided at the center side portion of the upper half portion of the rod portion 46. Since the lower half portion of the outer peripheral side divided body 48 is screwed to the screw shaft portion 49, the T-shaped engaging recess 47 is manufactured and the T-shaped engaging recess 47 of the T-shaped engaging portion 33 of the clamp rod 3 is formed. It is advantageous in terms of assembly.
油圧シリンダ4のピストン部45と環状受圧部材5との間に環状作動室が設けられ、この環状作動室が環状受圧部材5に上方向きの油圧を作用させるクランプ用油室42を構成したため、クランプ用油室42の油圧により環状受圧部材5及びサポート部材6を常時上方へ付勢してサポート部材6でもってグリップ部材2を支持することができる。 An annular working chamber is provided between the piston portion 45 of the hydraulic cylinder 4 and the annular pressure receiving member 5, and this annular working chamber constitutes a clamping oil chamber 42 for applying an upward hydraulic pressure to the annular pressure receiving member 5. The gripping member 2 can be supported by the support member 6 by always biasing the annular pressure receiving member 5 and the support member 6 upward by the hydraulic pressure of the oil chamber 42.
収容室14の上壁部14aと下壁部14bとで環状受圧部材5の筒状ピストン51の上端部に形成した係止鍔部52を受け止めることで、環状受圧部材の上限位置と下限位置を規定することができる。そして、外周側分割体48の下端の被係止部48aを下限位置にある環状受圧部材5の薄肉スリーブ53で受け止めることにより、クランプロッド3及びピストン部材41の下限位置を規定するため、クランプロッド3及びピストン部材41を下限位置に受け止めるストッパ部材を本体部材1に設ける必要がない。 By receiving the locking collar 52 formed at the upper end of the cylindrical piston 51 of the annular pressure receiving member 5 by the upper wall portion 14a and the lower wall portion 14b of the storage chamber 14, the upper limit position and the lower limit position of the annular pressure receiving member are determined. Can be prescribed. Then, the lower end position of the clamp rod 3 and the piston member 41 is defined by receiving the latched portion 48a at the lower end of the outer divided body 48 with the thin sleeve 53 of the annular pressure receiving member 5 at the lower limit position. 3 and the piston member 41 are not required to be provided on the main body member 1 for receiving the stopper member 41 at the lower limit position.
サポート部材6を環状受圧部材5から分割した形に構成したため、前記のように外周側分割体48の下端の被係止部48aを環状受圧部材5のの筒状ピストン51の上端に形成した薄肉スリーブ53で受け止めて下限位置を規定することが可能になった。
グリップ部材2とクランプロッド3が本体筒部11a及びピストン部材41に対して水平方向へ可動であるため、ワークWの穴Hの位置に製作誤差がある場合にも、グリップ部材2を穴Hの壁面に食い付かせることができる。
Since the support member 6 is configured to be divided from the annular pressure receiving member 5, the thin-walled portion 48 a formed at the lower end of the outer circumferential side divided body 48 at the upper end of the cylindrical piston 51 of the annular pressure receiving member 5 as described above. The lower limit position can be defined by receiving the sleeve 53.
Since the grip member 2 and the clamp rod 3 are movable in the horizontal direction with respect to the main body cylinder portion 11a and the piston member 41, the grip member 2 can be inserted into the hole H even when there is a manufacturing error in the position of the hole H of the workpiece W. It can bite the wall.
アンクランプ状態のとき、スクレーパ28により、グリップ部材2とクランプロッド3の軸心が油圧シリンダ4の軸心に一致するように復帰させることができる。
作動確認機構80により、環状受圧部材5が上限位置及び下限位置にある状態を検出できるため、グリップ部材2と環状受圧部材5が上限位置になったアンクランプ状態を確認でき、クランプ時にグリップ部材2がワークWの穴Hの壁面をグリップしないでグリップ部材2と環状受圧部材5が下限位置になったクランプミス状態を検出できる。
When in the unclamped state, the scraper 28 can return the grip member 2 and the clamp rod 3 so that the shaft centers thereof coincide with the shaft center of the hydraulic cylinder 4.
Since the state where the annular pressure receiving member 5 is in the upper limit position and the lower limit position can be detected by the operation confirmation mechanism 80, the unclamped state where the grip member 2 and the annular pressure receiving member 5 are at the upper limit position can be confirmed. However, it is possible to detect a clamping error state in which the grip member 2 and the annular pressure receiving member 5 are at the lower limit position without gripping the wall surface of the hole H of the workpiece W.
この実施例2のクランプ装置CAは、クランプロッドとピストン部材との連結構造を変更したものであり、実施例1と同様の部材に同様の符号を付し、実施例1と異なる構成についてのみ説明する。
図11に示すように、本体筒部11aAの上端部分にグリップ部材2とクランプロッド3Aとが装着されている。ピストン部材41Aのロッド部46Aの上端部分にはT形係合部46aが形成され、クランプロッド3Aの下端部分34には、上記のT形係合部46aが水平方向側方から係合可能なT形係合凹部47Aが形成されている。クランプロッド3Aの下端部分34と厚肉スリーブ53Aにはサポート部材6が摺動自在に外嵌されている。
The clamp device CA of the second embodiment is obtained by changing the connection structure between the clamp rod and the piston member. The same reference numerals are given to the same members as those of the first embodiment, and only the configuration different from the first embodiment will be described. To do.
As shown in FIG. 11, the grip member 2 and the clamp rod 3A are attached to the upper end portion of the main body cylinder portion 11aA. A T-shaped engaging portion 46a is formed at the upper end portion of the rod portion 46A of the piston member 41A, and the T-shaped engaging portion 46a can be engaged with the lower end portion 34 of the clamp rod 3A from the lateral side. A T-shaped engaging recess 47A is formed. A support member 6 is slidably fitted on the lower end portion 34 of the clamp rod 3A and the thick sleeve 53A.
前記ピストン部材のロッド部46Aが実施例1のクランプ装置Cのロッド部46よりも小径に形成され、前記環状受圧部材5Aの内径が小径化され、前記薄肉スリーブ53の代わりに厚肉スリーブ53Aが形成されている。クランプロッド3Aの下端には、厚肉スリーブ53Aの上端で受け止められる被係止部48Aが形成されている。
図示のように、グリップ部材2とクランプロッド3Aが上限位置のとき、被係止部48Aと厚肉スリーブ53Aの上端との間には、「グリップ部材拡径ストローク」としての隙間G1aが形成されている。この構成においては、環状受圧部材5Aの内径を小径化するため、環状受圧部材5Aの受圧面積を大きくし、グリップ部材2をサポートするサポート力を強化することができる。
The rod portion 46A of the piston member is formed to have a smaller diameter than the rod portion 46 of the clamping device C of the first embodiment, the inner diameter of the annular pressure receiving member 5A is reduced, and a thick sleeve 53A is used instead of the thin sleeve 53. Is formed. At the lower end of the clamp rod 3A, a locked portion 48A that is received by the upper end of the thick sleeve 53A is formed.
As shown in the drawing, when the grip member 2 and the clamp rod 3A are at the upper limit position, a gap G1a is formed as a “grip member diameter increasing stroke” between the locked portion 48A and the upper end of the thick sleeve 53A. ing. In this configuration, since the inner diameter of the annular pressure receiving member 5A is reduced, the pressure receiving area of the annular pressure receiving member 5A can be increased and the support force for supporting the grip member 2 can be strengthened.
この実施例3のクランプ装置CBは、クランプロッドとピストン部材との連結構造を変更したものであり、実施例1と同様の部材に同様の符号を付し、実施例1のクランプ装置と異なる構成についてのみ説明する。
図12に示すように、本体筒部11aBの上端部分にグリップ部材2とクランプロッド3Bとが装着されている。クランプロッド3Bの下端部分のT形係合部33については前記実施例と同様である。ピストン部材41Bのロッド部46Bが実施例1のクランプ装置Cのロッド部46よりも小径化され、同様に環状受圧部材5Bの内径も小径化され、実施例1の薄肉スリーブ53の代わりに厚肉スリーブ53Bが形成されている。ロッド部46Bの上端部分にはT形係合部33と逆向き姿勢のT形係合部46bが形成されて、T形係合部33の下面に当接されている。
The clamp device CB of the third embodiment is obtained by changing the connection structure between the clamp rod and the piston member. The same reference numerals are given to the same members as those of the first embodiment, and the configuration is different from the clamp device of the first embodiment. Only will be described.
As shown in FIG. 12, the grip member 2 and the clamp rod 3B are attached to the upper end portion of the main body cylinder portion 11aB. The T-shaped engaging portion 33 at the lower end portion of the clamp rod 3B is the same as in the above embodiment. The rod portion 46B of the piston member 41B has a smaller diameter than the rod portion 46 of the clamp device C of the first embodiment. Similarly, the inner diameter of the annular pressure receiving member 5B is also reduced, and the thick sleeve 53 instead of the thin sleeve 53 of the first embodiment is used. A sleeve 53B is formed. At the upper end portion of the rod portion 46B, a T-shaped engaging portion 46b having a posture opposite to that of the T-shaped engaging portion 33 is formed and is in contact with the lower surface of the T-shaped engaging portion 33.
これらT形係合部33,46bを連結する連結部材90は、外形が円筒形状であり、内部の中段部に2つのT形係合部33,46bを収容する収容穴91を有し、収容穴91の上側と下側に夫々収容穴91よりも小径の円形開口92,93が形成されている。連結部材90は、軸心を通る鉛直面で分断した1対の分割体からなり、これら分割体を2つのT形係合部33,46bの外側に被せてから、1対のリング部材94,95で結合されている。上側のリング部材94は上端近傍位置のリング溝に装着され、下側のリング部材95は下端近傍位置のリング溝に装着されている。この連結部材90と厚肉スリーブ53Bにはサポート部材6が摺動自在に外嵌されている。 The connecting member 90 that connects the T-shaped engaging portions 33 and 46b has a cylindrical outer shape, and has a receiving hole 91 for receiving the two T-shaped engaging portions 33 and 46b in the inner middle portion. Circular openings 92 and 93 having a smaller diameter than the accommodation hole 91 are formed on the upper side and the lower side of the hole 91, respectively. The connecting member 90 is composed of a pair of divided bodies that are divided by a vertical plane passing through the shaft center, and covers these divided bodies on the outside of the two T-shaped engaging portions 33, 46b, and then a pair of ring members 94, Combined at 95. The upper ring member 94 is mounted in the ring groove near the upper end, and the lower ring member 95 is mounted in the ring groove near the lower end. A support member 6 is slidably fitted on the connecting member 90 and the thick sleeve 53B.
図示のように、グリップ部材2とクランプロッド3Bが上限位置のとき、連結部材90と厚肉スリーブ53Bの上端との間には、「グリップ部材拡径ストローク」としての隙間G1bが形成されている。
この構成においては、環状受圧部材5Bの内径を小径化するため、環状受圧部材5Bの受圧面積を大きくし、グリップ部材2をサポートするサポート力を強化することができるうえ、クランプロッド3Bとピストン部材41Bのロッド部46Bを連結する構造を簡単化することができる。
As shown in the figure, when the grip member 2 and the clamp rod 3B are at the upper limit position, a gap G1b as a “grip member diameter increasing stroke” is formed between the connecting member 90 and the upper end of the thick sleeve 53B. .
In this configuration, since the inner diameter of the annular pressure receiving member 5B is reduced, the pressure receiving area of the annular pressure receiving member 5B can be increased, the support force for supporting the grip member 2 can be strengthened, and the clamp rod 3B and the piston member can be strengthened. The structure which connects the rod part 46B of 41B can be simplified.
次に、前記実施例を部分的に変更する例について説明する。
1)前記隙間G1,G2、その他の諸寸法として示した数値は、あくまで例示に過ぎず、それらの数値に限定されるものではない。
2)上部本体11の平面視の形状は図示のものに限らず、円形に形成してもよい。また、このクランプ装置は油圧シリンダ4を採用したが、油圧シリンダの代わりにエアシリンダを採用してもよい。
3)その他、本発明の趣旨を逸脱しない範囲で、種々の変更を付加した形態で実施することができる。
Next, an example in which the above embodiment is partially changed will be described.
1) The numerical values shown as the gaps G1, G2 and other dimensions are merely examples, and are not limited to these numerical values.
2) The shape of the upper body 11 in plan view is not limited to the illustrated shape, and may be formed in a circular shape. Moreover, although this hydraulic pressure cylinder 4 was employ | adopted for this clamping apparatus, you may employ | adopt an air cylinder instead of a hydraulic cylinder.
3) In addition, various modifications can be made without departing from the spirit of the present invention.
機械加工に供する穴付きのワークの上面側に切削加工を施す場合に、ワークの穴を利用してクランプすることができるため、工業上の種々の利用可能性がある。 When cutting is performed on the upper surface side of a workpiece with a hole to be used for machining, the workpiece can be clamped using the hole of the workpiece, so that there are various industrial applicability.
C,CA,CB クランプ装置
1 本体部材
2 グリップ部材
3,3A,3B クランプロッド
4 油圧シリンダ
5,5A,5B 環状受圧部材
6 サポート部材
11 上部本体部材
11a,11aA,11aB 本体筒部
12 下部本体部材
14 収容室
14a 上端壁
14b 下端壁
18 着座面
28 スクレーパ(弾性付勢手段)
33 T形係合部
41,41A,41B ピストン部材
42 クランプ用油室
43 アンクランプ用油室
45 ピストン部
46,46A,46B ロッド部
47,47A T形係合凹部
48 外周側分割体
49 ネジ軸部
51 筒状ピストン
52 係止鍔部
53 薄肉スリーブ
80 作動確認機構
81 エア噴出孔
82〜85 エア通路
86 圧力スイッチ
C, CA, CB Clamping device 1 Body member 2 Grip members 3, 3A, 3B Clamp rod 4 Hydraulic cylinders 5, 5A, 5B Annular pressure receiving member 6 Support member 11 Upper body member 11a, 11aA, 11aB Body cylinder portion 12 Lower body member 14 Storage chamber 14a Upper end wall 14b Lower end wall 18 Seating surface 28 Scraper (elastic biasing means)
33 T-shaped engaging portion 41, 41A, 41B Piston member 42 Clamping oil chamber 43 Unclamping oil chamber 45 Piston portion 46, 46A, 46B Rod portion 47, 47A T-shaped engaging recess 48 Outer peripheral side divided body 49 Screw shaft Part 51 Cylindrical piston 52 Locking collar part 53 Thin-walled sleeve 80 Operation confirmation mechanism 81 Air ejection holes 82 to 85 Air passage 86 Pressure switch
Claims (13)
前記本体部材の上半部の中心部に上方へ突出する円筒状の本体筒部と、
前記流体圧シリンダによりクランプロッドをグリップ部材に対して下方へ相対移動させてグリップ部材を拡径させる際にグリップ部材を上限位置に支持可能な支持機構とを備え、
アンクランプ状態のとき前記グリップ部材の上半部と前記クランプロッドのテーパ軸部が前記本体筒部の上端外へ突出するように構成すると共に、前記相対移動の最大ストロークを前記支持機構により制限するように構成したことを特徴とするクランプ装置。 A grip member inserted from below into the hole of the workpiece and capable of gripping the inner peripheral surface of the hole, a clamp rod having a taper shaft portion fitted and engaged with the grip member, and the grip member and the clamp rod In a clamping device having a fluid pressure cylinder that can be driven back and forth in the center direction, and a body member to which the grip member, the clamp rod, and the fluid pressure cylinder are attached,
A cylindrical main body cylindrical portion projecting upward at the center of the upper half of the main body member;
A support mechanism capable of supporting the grip member at the upper limit position when the diameter of the grip member is increased by moving the clamp rod downward relative to the grip member by the fluid pressure cylinder;
The upper half part of the grip member and the taper shaft part of the clamp rod project outside the upper end of the main body cylinder part in the unclamped state, and the maximum stroke of the relative movement is limited by the support mechanism. A clamping device characterized by being configured as described above.
前記流体圧シリンダのピストン部材を構成するピストン部及びこのピストン部から上方へ本体筒部内まで延びるロッド部と、
前記ロッド部に外嵌され流体圧で上方へ付勢された環状受圧部材と、
前記ロッド部に可動に外嵌され且つ環状受圧部材と一体的に動作して前記グリップ部材を下方から支持するサポート部材とを備え、
前記支持機構が前記環状受圧部材とサポート部材と環状受圧部材の下端に流体圧を作用させる環状作動室とを備えたことを特徴とする請求項1に記載のクランプ装置。 A seating surface for workpiece seating formed at the upper end of the main body cylinder,
A piston portion constituting the piston member of the fluid pressure cylinder and a rod portion extending upward from the piston portion into the main body cylinder portion;
An annular pressure receiving member externally fitted to the rod portion and biased upward by fluid pressure;
A support member that is externally movably fitted to the rod portion and operates integrally with the annular pressure receiving member to support the grip member from below;
The clamp device according to claim 1, wherein the support mechanism includes an annular pressure member, a support member, and an annular working chamber that applies fluid pressure to a lower end of the annular pressure member.
前記ロッド部の上端部分に形成されて前記T形係合部が水平方向側方から係合可能なT形係合凹部とを有することを特徴とする請求項2に記載のクランプ装置。 A T-shaped engagement portion formed at a lower end portion of the clamp rod;
The clamp device according to claim 2, further comprising a T-shaped engagement recess formed at an upper end portion of the rod portion and engageable from the horizontal side.
前記作動確認手段により、前記環状受圧部材が上限位置及び下限位置にある状態を検出可能に構成したことを特徴とする請求項6に記載のクランプ装置。 An air ejection hole that is opened to the lower end wall of the storage chamber so as to face the locking collar, an air passage that supplies pressurized air to the air ejection hole, and the presence or absence of air pressure in the air passage is detected. An operation confirmation means having an air pressure detection means to perform,
The clamp device according to claim 6, wherein the operation confirmation unit is configured to be able to detect a state in which the annular pressure receiving member is at an upper limit position and a lower limit position.
1st detection means which can detect that the said support mechanism is located in an upper limit position, and 2nd detection means which can detect that the said support mechanism is located in a lower limit position, It is characterized by the above-mentioned. The clamping device according to claim 1 or 2.
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CN107701126A (en) * | 2017-11-09 | 2018-02-16 | 盐城凯发石油机械有限公司 | A kind of erection device of going into the well for aiding in sucker rod connection |
CN114310707A (en) * | 2021-12-30 | 2022-04-12 | 安徽省拓思智能科技有限公司 | Clamping equipment for detecting hydraulic power mechanical element |
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JPH11188551A (en) * | 1997-12-24 | 1999-07-13 | Kosmek Ltd | Clamp device |
JP2003266262A (en) * | 2002-03-13 | 2003-09-24 | Pascal Corp | Clamp device |
JP2004195583A (en) * | 2002-12-18 | 2004-07-15 | Pascal Engineering Corp | Clamping device with positioning function |
JP2004209607A (en) * | 2003-01-07 | 2004-07-29 | Kosmek Ltd | Alignment driving mechanism and positioning device provided with the mechanism |
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CN107701126A (en) * | 2017-11-09 | 2018-02-16 | 盐城凯发石油机械有限公司 | A kind of erection device of going into the well for aiding in sucker rod connection |
CN114310707A (en) * | 2021-12-30 | 2022-04-12 | 安徽省拓思智能科技有限公司 | Clamping equipment for detecting hydraulic power mechanical element |
CN114310707B (en) * | 2021-12-30 | 2024-04-23 | 安徽省拓思智能科技有限公司 | Clamping equipment for detecting hydraulic power mechanical element |
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