US 12,134,157 B2
Clamping apparatus
Yosuke Haruna, Kobe (JP)
Assigned to KOSMEK LTD., Kobe (JP)
Appl. No. 17/771,952
Filed by KOSMEK LTD., Kobe (JP)
PCT Filed Oct. 13, 2020, PCT No. PCT/JP2020/038559
§ 371(c)(1), (2) Date Apr. 26, 2022,
PCT Pub. No. WO2021/085110, PCT Pub. Date May 6, 2021.
Claims priority of application No. 2019-195284 (JP), filed on Oct. 28, 2019.
Prior Publication US 2022/0371137 A1, Nov. 24, 2022
Int. Cl. B23Q 3/08 (2006.01); B23Q 1/00 (2006.01); B25J 15/04 (2006.01)
CPC B23Q 3/082 (2013.01) [B23Q 1/009 (2013.01); B25J 15/0408 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A clamping apparatus comprising:
a piston (8) including a piston main body (9) hermetically inserted in a first block (3) so as to be movable in an axial direction of the piston (8);
a lock chamber (10), to and from which pressure fluid is supplied and discharged, the lock chamber (10) being provided on a forward or backward side relative to the piston main body (9);
a lock port (13), which is provided to the first block (3) and through which the pressure fluid is supplied to/discharged from the lock chamber (10);
a release chamber (11), to and from which the pressure fluid is supplied and discharged, the release chamber (11) being provided on a side opposite from the lock chamber (10) relative to the piston main body (9) interposed between the lock chamber (10) and the release chamber (11);
a release port (15), which is provided to the first block (3) and through which the pressure fluid is supplied to/discharged from the release chamber (11);
a plug portion (16) protruding from the first block (3) and configured to be inserted in a second block (4), the plug portion (16) having a tubular shape in which an output rod portion (17) of the piston (8) is inserted so as to be movable in the axial direction;
an engaging means (19) configured to pull the second block (4) toward the first block (3) and fix the second block (4) as the output rod portion (17) moves in the axial direction;
a valve case (31), which is provided to the first block (3) and to which there are provided a primary-side pressure fluid supply/discharge port (34) connected to a pressure fluid supply source, a pressure fluid discharge port (36) through which the pressure fluid is discharged, and a secondary-side pressure fluid supply/discharge port (35) connected to the lock port (13) or to the release port (15); and
a valve member (37) disposed in the valve case (31), the valve member (37) having, at its end portion in the axial direction, an operation portion (38) protruding from the valve case (31), wherein
when the operation portion (38) is pushed into the valve case (31), the apparatus transitions from a first state, in which communication between: each of the primary-side pressure fluid supply/discharge port (34) and the secondary-side pressure fluid supply/discharge port (35); and the pressure fluid discharge port (36) is open, to a second state, in which communication between: each of the primary-side pressure fluid supply/discharge port (34) and the secondary-side pressure fluid supply/discharge port (35); and the pressure fluid discharge port (36) is closed.