US 12,240,027 B2
Press brake
Shogo Akiyama, Kanagawa (JP)
Assigned to AMADA CO., LTD., Kanagawa (JP)
Appl. No. 18/007,932
Filed by AMADA CO., LTD., Kanagawa (JP)
PCT Filed Jun. 7, 2021, PCT No. PCT/JP2021/021479
§ 371(c)(1), (2) Date Dec. 2, 2022,
PCT Pub. No. WO2021/256305, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 2020-102874 (JP), filed on Jun. 15, 2020.
Prior Publication US 2023/0241659 A1, Aug. 3, 2023
Int. Cl. B21D 5/02 (2006.01); B21D 43/26 (2006.01)
CPC B21D 5/02 (2013.01) [B21D 43/26 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A press brake, comprising:
a pair of support blocks provided on a back side of a lower table in a main frame and separated in a lateral direction;
elevating members each provided to respective one of the pair of support blocks so as to be able to ascend and descend and extending vertically;
a ball screw provided so as to be rotatable to a first elevating member of a pair of the elevating members or a first support block of the pair of support blocks, extending vertically, and configured to be rotated by a driving of a motor;
a nut member provided to the first support block or the first elevating member and screwed into the ball screw;
a stretch extending in the lateral direction, one end side of the stretch in the lateral direction being connected to an upper end portion of the first elevating member and another end side of the stretch in the lateral direction being connected to an upper end portion of a second elevating member of the pair of elevating members;
an abutting member provided to the stretch, the abutting member including, on a distal end side, an abutting surface against which an end surface of a plate-shaped workpiece can be abutted, the abutting member being configured to be movable in a front-rear direction with respect to the main frame;
a support mechanism provided to the first elevating member so as to support the stretch from below; and
a brake configured to secure the ball screw in a nonrotatable manner, wherein
one end side of the stretch in the lateral direction is connected to an upper end portion of the first elevating member via a first connecting pin so as to be rotationally movable, and another end side of the stretch in the lateral direction is connected to an upper end portion of the second elevating member via a second connecting pin so as to be rotationally movable, and
the support mechanism includes
a support base provided to the first elevating member, and
an adjusting screw provided by being screwed into the support base so as to contact the stretch from below.