Abstract: A plug member (12) inserted into a positioning hole (5) formed in a second block (2) is projected from a first block. Two slide portions (61, 61) opposed to each other across the plug member (12) are arranged around the plug member (12) movably in a first radial direction (D1) substantially orthogonal to the opposed direction. An annular pressing member (15) which is allowed to diametrically expand and diametrically contract is arranged around an outer periphery of the slide portion (61, 61). The slide portions (61, 61) diametrically expand the pressing member (15) in a second radial direction (D2) which is the opposed direction by a drive device to press the pressing member (15) against an inner peripheral surface of the positioning hole (5), by which the slide portions (61, 61) are moved in the first radial direction (D1) with respect to the plug member (12).

Abstract: A plug member (12) inserted into a positioning hole (5) formed in a second block (2) is projected from a first block (1). A plurality of slide portions (61) opposed to each other across the plug member (12) are arranged around the plug member (12) movably in a first radial direction (D1) substantially orthogonal to the opposed direction thereof. A first pressing member (15) and a second pressing member (19) are arranged outside the slide portions (61) diametrically expandably and diametrically contractibly and axially movably. The first pressing member (15) is driven toward a base end by a drive device, whereby the slide portions (61) expand the first pressing member (15) via the second pressing member (19), thereby the slide portions (61) are moved in the first radial direction (D1) with respect to the plug member (12).

Abstract: A plug member (12) inserted into a positioning hole (5) formed in a second block (2) is projected from a first block (1). A plurality of slide portions (61) opposed to each other across the plug member (12) are arranged around the plug member (12) movably in a first radial direction (D1) substantially orthogonal to the opposed direction thereof. A first pressing member (15) and a second pressing member (19) are arranged outside the slide portions (61) diametrically expandably and diametrically contractibly and axially movably. The first pressing member (15) is driven toward a base end by a drive device, whereby the slide portions (61) expand the first pressing member (15) via the second pressing member (19), thereby the slide portions (61) are moved in the first radial direction (D1) with respect to the plug member (12).

Abstract: A left end portion of a clamp arm (30) is vertically swingably connected to an upper portion of a rod (12) vertically movably inserted into a housing (3), and an annular supported member (26) is attached to a support member (25) rotatably around an axis, the support member (25) being provided to an outer periphery of an upper portion of the housing (3). A pivot portion (28) provided to the supported member (26) and a non-edge portion in a longitudinal direction of the clamp arm (30) are connected by a link member (33). The support member (25) and the supported member (26) are provided with a means (A) for receiving an upward force acting from the link member (33) on the pivot portion (28) during a clamping operation. The supported member (26) is fixed to the support member (25) at a desired rotation angle position by a lock means (B).

Abstract: In a reference block (1), a center hole (20) having a tapered inner surface (23) narrowing downward is provided. A rigid sleeve (21) having a tapered outer surface (27) making a tapering engagement with the tapered inner surface (23) is supported by the reference block (1) axially movably. During a locking drive, an output member (48) inserted into the rigid sleeve (21) is moved downward. Then, a clamping member (33) inserted into a socket hole (3) of a work pallet (2) is moved downward against an elastic member (45) and radially-outwardly for locking, and the tapered outer surface (27) of the rigid sleeve (21) makes a tapering engagement with the tapered inner surface (23).

Abstract: A plug member (12) inserted into a positioning hole (5) formed in a second block (2) is projected from a first block (1). A plurality of slide portions (61) opposed to each other across the plug member (12) are arranged around the plug member (12) movably in a first radial direction (D1) substantially orthogonal to the opposed direction thereof. A first pressing member (15) and a second pressing member (19) are arranged outside the slide portions (61) diametrically expandably and diametrically contractibly and axially movably. The first pressing member (15) is driven toward a base end by a drive device, whereby the slide portions (61) expand the first pressing member (15) via the second pressing member (19), thereby the slide portions (61) are moved in the first radial direction (D1) with respect to the plug member (12).

Abstract: A housing (15) fixed to a reference block (1) is provided with a guide hole (20) into which a plug portion (3) of a movable member (2) is allowed to be inserted. Inside this guide hole (20) is arranged an outer sleeve (21) vertically movably, and this outer sleeve (21) is advanced upward by a predetermined advancing stroke by a coned disc spring (25). An inner sleeve (31) which is allowed to fit outside the plug portion (3) is wedge-engaged with the outer sleeve (21) from above, and this inner sleeve (31) is adapted to be diametrically expandable and diametrically contractible. The inner sleeve (31) is moved vertically by an output member (36).

Abstract: A housing (6) is provided in a reference block (1). An annular plug (9), which is to be inserted into a positioning hole (3) of a work pallet (2), is projected upward from the housing (6). An output member (13) is inserted into a guide hole (10) of the housing (6) vertically movably. An upper end of the output member (13) is inserted into the annular plug (9), and a plurality of pressing members (56) are supported on a peripheral wall (9a) of the annular plug (9) radially movably. An annular aligning space (31) is formed between a guided portion (21) of the output member (13) and the guide hole (10). A shuttle member (41), which is diametrically expandable and contractible, is inserted into the aligning space (31). The shuttle member (41) is urged upward by a spring (51).

Abstract: An annular plug (12) to be inserted into a cast hole (11) of a work (M) is projected upward from a housing (3). In a peripheral wall (13) of the annular plug (12), through holes (14) extending radially are formed at intervals circumferentially. A ball (15) is inserted into each of the through holes (14). An operating rod (18) is inserted into a cylindrical hole (17) of the annular plug (12). In an outer peripheral surface of an upper end portion of the operating rod (18), accommodating grooves (19) extending vertically are formed at intervals circumferentially corresponding to the balls (15). Guide surfaces (24, 24, 24) are formed between the adjacent accommodating grooves (19, 19). These guide surfaces (24) are fitted into the cylindrical hole (17) so as to be prevented from moving radially and allowed to move axially.

Abstract: A plug member (12) inserted into a positioning hole (5) formed in a second block (2) is projected from a first block (1). A plurality of slide portions (61) opposed to each other across the plug member (12) are arranged around the plug member (12) movably in a first radial direction (D1) substantially orthogonal to the opposed direction thereof. A first pressing member (15) and a second pressing member (19) are arranged outside the slide portions (61) diametrically expandably and diametrically contractibly and axially movably. The first pressing member (15) is driven toward a base end by a drive device, whereby the slide portions (61) expand the first pressing member (15) via the second pressing member (19), thereby the slide portions (61) are moved in the first radial direction (D1) with respect to the plug member (12).

Abstract: An annular plug portion (21) projects from a clamp pallet (2). An annular shuttle member (23) is supported by the plug portion (21) to be movable in the vertical direction. A work pallet (3) is provided with a tapered inner peripheral surface (12) which makes an engagement with a tapered outer peripheral surface (28) of the shuttle member (23). A transmission member (29) is inserted into an upper portion of a cylindrical hole (21a) of the plug portion (21), while a rod (31) is inserted into a lower portion of the cylindrical hole (21a). When the rod (31) is driven downward for clamping, an output portion (36) of the rod (31) moves the work pallet (3) downward through engaging balls (34) to form a transmission gap (G) between a pushing portion (31a) of the upper end of the rod (31) and a pressure receiving portion (29b) of the transmission member (29). When the rod (31) is driven upwards for unclamping, the pushing portion (31a) pushes upwards the work pallet (3) through the transmission member (29).

Abstract: A supporting face (1a) is provided on a base plate (1), a face (2a) to be supported is provided on a work pallet (2), and an engagement hole (3) is opened in the face (2a) to be supported. A core column (11) is projected upward from a housing (9) fixed to the base plate (1). An elastic sleeve (12) that fits in the engagement hole (3) is supported in a space at the outer periphery of the core column (11), on the upper face of the housing (9). Wedge spaces (W) narrowing downward are circumferentially arranged at an substantially equal intervals between the core column (11) and the elastic sleeve (12). Wedge members (15) are vertically movably inserted in each of the wedge spaces (W). Input portions (20) of the wedge members (15) are connected to an output portion (44) of an upper rod (43) of a piston (33).

Abstract: A plug portion (27) is projected from a reference member (2) so as to be inserted into a hole (5) opened in a movable member (3). A fitting surface (16) allowed to fit to an inner peripheral surface of the hole (5) is formed on an outer peripheral surface of the plug portion (27). In the fitting surface (16) are opened desirably a plurality of fluid flow holes (38), and when the fitting surface (16) comes into close contact with the inner peripheral surface of the hole (5), the fluid flow holes (38) are closed by the inner peripheral surface of the hole (5). Pressurized fluid supplied to a fluid port (39) is jetted from the fluid flow holes (38).

Abstract: A plug member (12) is projected upward from a first block (1) so as to be inserted into a positioning hole (5) of a second block (2). An inclined outer surface (13) getting closer to an axis upward is provided on the plug member (12). A sleeve member (15) which is allowed to deform in both a diametrically expanding direction and a diametrically contracting direction is arranged outside the inclined outer surface (13). The sleeve member (15) is provided with a straight outer surface (16) which is allowed to come into close contact with the positioning hole (5) and an inclined inner surface (17) facing the inclined outer surface (13). A drive member (21) is inserted into the plug member (12) axially movably and connected to the sleeve member (15). The sleeve member (15) is moved vertically by a drive device (D).

Abstract: A plug member (12) inserted into a positioning hole (5) formed in a second block (2) is projected from a first block. Two slide portions (61, 61) opposed to each other across the plug member (12) are arranged around the plug member (12) movably in a first radial direction (D1) substantially orthogonal to the opposed direction. An annular pressing member (15) which is allowed to diametrically expand and diametrically contract is arranged around an outer periphery of the slide portion (61, 61). The slide portions (61, 61) diametrically expand the pressing member (15) in a second radial direction (D2) which is the opposed direction by a drive device to press the pressing member (15) against an inner peripheral surface of the positioning hole (5), by which the slide portions (61, 61) are moved in the first radial direction (D1) with respect to the plug member (12).

Abstract: A plug portion (27) is projected from a first block (1) so as to be inserted into a insertion hole (5) opened in a second block (2). A support surface (9a) is formed on the first block (1) so as to be brought into contact with a supported surface (2a) formed on the second block (2). In the support surface (9a) is opened a fluid flow hole (59). A gap supporting member (K) acting force upon the second block (2) in such a direction as to separate the second block (2) from the first block (1) so as to form a gap (G1) between the supported surface (2a) and the support surface (9a) is provided on the first block (1). A pull member (21) eliminates the gap (G1) by making the second block (2) approach the first block (1) against the force of the gap supporting member (K) in such a condition that an outer peripheral surface of the plug portion (27) is in close contact with an inner peripheral surface of the insertion hole (5) to bring the supported surface (2a) into contact with the support surface (9a).

Abstract: A housing (15) fixed to a reference block (1) is provided with a guide hole (20) into which a plug portion (3) of a movable member (2) is allowed to be inserted. Inside this guide hole (20) is arranged an outer sleeve (21) vertically movably, and this outer sleeve (21) is advanced upward by a predetermined advancing stroke by a coned disc spring (25). An inner sleeve (31) which is allowed to fit outside the plug portion (3) is wedge-engaged with the outer sleeve (21) from above, and this inner sleeve (31) is adapted to be diametrically expandable and diametrically contractible. The inner sleeve (31) is moved vertically by an output member (36).

Abstract: A drive piston (11) is inserted into a housing (8) vertically movably. A pull rod (18) is projected further upward than a support surface (S) of the housing (8), and the pull rod (18) is connected to the drive piston (11) radially movably. An inner engaging member (38) is supported on an outer periphery of the pull rod (18) vertically movably. The inner engaging member (38) is adapted to be radially movable with respect to the housing (8), and the inner engaging member (38) is advanced upward by a coned disc spring (41). A plurality of outer engaging members (39) to be inserted into an engaging hole (3) of a work pallet (2) are arranged on an outer periphery of the inner engaging member (38). The plurality of outer engaging members (39) are wedge-engaged with the inner engaging member (38) from the upper side. To these outer engaging members (39) is joined an upper portion of the pull rod (18). The plurality of outer engaging members (39) are urged radially inward by a ring-shaped flat spring (44).

Abstract: An annular plug portion (21) projects from a clamp pallet (2). An annular shuttle member (23) is supported by the plug portion (21) to be movable in the vertical direction. A work pallet (3) is provided with a tapered inner peripheral surface (12) which makes an engagement with a tapered outer peripheral surface (28) of the shuttle member (23). A transmission member (29) is inserted into an upper portion of a cylindrical hole (21a) of the plug portion (21), while a rod (31) is inserted into a lower portion of the cylindrical hole (21a). When the rod (31) is driven downward for clamping, an output portion (36) of the rod (31) moves the work pallet (3) downward through engaging balls (34) to form a transmission gap (G) between a pushing portion (31a) of the upper end of the rod (31) and a pressure receiving portion (29b) of the transmission member (29). When the rod (31) is driven upwards for unclamping, the pushing portion (31a) pushes upwards the work pallet (3) through the transmission member (29).

Abstract: A housing (6) is provided in a reference block (1). An annular plug (9), which is to be inserted into a positioning hole (3) of a work pallet (2), is projected upward from the housing (6). An output member (13) is inserted into a guide hole (10) of the housing (6) vertically movably. An upper end of the output member (13) is inserted into the annular plug (9), and a plurality of pressing members (56) are supported on a peripheral wall (9a) of the annular plug (9) radially movably. An annular aligning space (31) is formed between a guided portion (21) of the output member (13) and the guide hole (10). A shuttle member (41), which is diametrically expandable and contractible, is inserted into the aligning space (31). The shuttle member (41) is urged upward by a spring (51).