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公开(公告)号：US11060537B1
公开(公告)日：2021-07-13
申请号：US16756646
申请日：2018-10-01
申请人： KOSMEK LTD.
发明人： Ryota Kojima
摘要： A piston (6) is hermetically inserted via a sealing member (7) in a cylinder hole (2) provided in a housing (1) so that the piston (6) is movable in an up-down direction. A communication passage (21) provided in an inner peripheral wall of the cylinder hole (2) is communicatively connected to a lock-side supply and discharge passage (13) through which pressurized oil is supplied to and discharged from a lock chamber (11) of the housing (1). An opening area (S1) of the communication passage (21) is designed to be smaller than an opening area (S2) of the lock-side supply and discharge passage (13). When the piston (6) is caused to move for releasing from a raised position to a lower limit position, the sealing member (7) is lowered from the raised position beyond the communication passage (21), to open communication between a release chamber (12) in the housing (1) and the lock-side supply and discharge passage (13) via the communication passage (21).
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公开(公告)号：US10385889B2
公开(公告)日：2019-08-20
申请号：US15574586
申请日：2016-06-13
申请人： KOSMEK LTD.
发明人： Ryota Kojima
摘要： A piston body (11) of an advancing-retracting first piston (10) and a force-multiplying second piston (15) are arranged in series in a vertical direction in a housing (1). Force acting on the second piston (15) due to pressurized oil in a lock chamber (16) is multiplied and converted into multiplied upward force via engaging balls (32) of a force multiplier (30). Then, the multiplied upward force is transmitted to an output rod (12) of the first piston (10). At an intermediate part of a first air detection passage (38) for use in detection formed in the housing (1), a first detection valve (40) is provided. When the engaging balls (32) move inward in a radial direction, the first detection valve (40) is closed.
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公开(公告)号：US11869711B2
公开(公告)日：2024-01-09
申请号：US17257441
申请日：2019-05-31
申请人： KOSMEK LTD.
发明人： Ryota Kojima
CPC分类号： H01F7/0252 , B29C33/32 , B29C45/1742 , B29C2045/1746
摘要： Provided is a magnetic clamp device that reduces a magnetic flux leaking from a magnetic circuit passing through a permanent magnet and a magnetic pole member. The magnetic clamp device includes: a permanent magnet 20 surrounding a magnetic pole member 10 and disposed on a surface of a plate PL made of a magnetic body that magnetically clamps a mold in a magnetized state; and a reversible magnet 16 capable of reversing polarity and disposed at the rear of the permanent magnet 20. The magnetic pole member 10 is constituted by a plurality of magnetic pole pieces 101, 102, 103, and 104. Each of the magnetic pole pieces has a first lateral surface R with a shape corresponding to the opposite permanent magnet 20, and a second lateral surface T at which adjacent magnetic pole pieces oppose each other. The magnetic pole member 10 moves as the first lateral surfaces R are suction-adsorbed by the permanent magnet 20 without the second lateral surfaces T interfering with each other. The magnetic pole pieces 101, 102, 103, and 104 are held from the front and rear.
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公开(公告)号：US11923135B2
公开(公告)日：2024-03-05
申请号：US17631483
申请日：2020-07-16
申请人： KOSMEK LTD.
发明人： Ryota Kojima
摘要： Provided is a magnetic clamp device having a disassembly structure that is easy to maintain. In the magnetic clamp device 1, a magnetic pole 21 and an alnico magnet 23 each have fastening holes 21a, 23a that communicate with each other. The cavity portion 31 of the plate body 3 has an opening 33 that penetrates from the bottom surface 32b thereof to the back side of the plate body 3. A cap 7 having a base portion 71 having a bolt hole 74 communicating with the fastening holes 21a, 23a and a flange portion 72 abutting the surface 3b of the back side of the plate body 3 is inserted into the opening 33. A bolt 8 inserted into the fastening hole 23a of the magnetic pole 21 and the alnico magnet 23 from the front side of a magnetic pad 2 is screwed into a female screw thread 74a provided in the bolt hole 74 of the cap 7.
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公开(公告)号：US11305389B2
公开(公告)日：2022-04-19
申请号：US16757017
申请日：2018-10-15
申请人： KOSMEK LTD.
发明人： Ryota Kojima
摘要： An output rod (20) of an electric clamping device includes: a tubular power transmission member (25) screw-connected to a decelerator (6); and an output rod main body (24) disposed radially inward of an inner peripheral surface of a cylindrical hole of the power transmission member (25) with a clearance between the output rod main body (24) and the inner peripheral surface. The output rod (20) further includes: a rotation preventing mechanism (26); a lock-side driving mechanism (27, 42), a release-side driving mechanism (28), and an output rod guide mechanism (29).
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公开(公告)号：US10508665B2
公开(公告)日：2019-12-17
申请号：US15555699
申请日：2016-04-06
申请人： KOSMEK LTD.
发明人： Ryota Kojima , Masahiro Yoshimi , Hideaki Yokota
摘要： In a rod hole (19) of a holding rod (18) held in a guide hole (17) of a piston (10), a limit switch (20) is fixed and a detection rod (21) is inserted. A first engagement ball (30) and a second engagement ball (40) are configured to be in contact with a first cam surface (32) and a second cam surface (42), respectively, which are provided at an outer periphery of the detection rod (21). The first engagement ball (30) and the second engagement ball (40) are configured to be in contact with a first pushing portion (35) and a second pushing portion (45), respectively, which are provided inside the guide hole (17). The position of the piston (10) is detected by electrically or electronically detecting the movement of the detection rod (21) by the limit switch (20).
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