摘要:
A movable hook portion (13) provided in a unit side coupling surface (2a) of an accessory unit (2) includes a hook portion main body (14), which is formed with a movable claw (23a) and a pressed piece (22), and a straight spring (15), slidably accommodates the hook portion main body (14) in a main body accommodation concave portion (16) formed in the unit side coupling surface (2a), and accommodates the straight spring (15) in a spring accommodation concave portion (17a) formed in the unit side coupling surface (2a) so as to be orthogonal to a sliding direction of the hook portion main body (14), with a middle portion in a length direction of the spring being engaged with the hook portion main body (14). When the hook portion main body (14) is slid in a disengaging direction which brings the movable claw (23a) and a hooking hole (8a) of an electromagnetic contactor (1) into a disengaged state by pressing the pressed piece (24), an elastic restoring force of the straight spring (15) elastically deformed into a bow-like shape acts on the hook portion main body (14) in a direction opposite to the disengaging direction.
摘要:
A reversible unit (20) is provided with a pair of interlock plates (21, 22) which are detachably connected to operation indication pieces (4a, 4b) of a pair of electromagnetic contactors (1a, 1b) and which can move in the same direction as the movement direction of the operation indication pieces, a lock piece (23) which connects the pair of interlock plates (21, 22), a first normally-closed contact (24), and a second normally-closed contact (25). In a closing operation of one of the electromagnetic contactors (1a), the lock piece (23) allows one of the interlock plates (21) to move, and prohibits the movement of the other interlock plate (22). The first normally-closed contact (24) is connected in series in a power supply circuit to an exciting coil (6b) of the other of the electromagnetic contactors (1b), and one of the interlock plates (21) is provided with a first opening operation engagement portion (34) which opens the first normally-closed contact (24) when the interlock plate (21) moves.
摘要:
A plurality of terminal chambers 20a to 20e are formed in a housing 16 by partitioning using a plurality of partition walls 24a to 24e. In the terminal chambers, fixed contactors 31 each having a fixed contact point 31d and a terminal screw 31a are mounted. Engaged portions 31b are formed integrally with the fixed contactors. Further, a press-fit engaging portion 26 is provided in each of the terminal chambers, is formed as a space different from a space accommodating a movable contact point support, and causes the engaged portion to be engaged by press-fitting.
摘要:
Two electromagnetic contact devices 1a, 1b are arranged adjacently, a reversible unit 2 is detachably mounted on these electromagnetic contact devices, and two auxiliary contact point units 4a, 4b are detachably mounted on the reversible unit; in addition, two surge absorption units 3a, 3b are detachably mounted on the electromagnetic contact devices.
摘要:
A movable hook portion (13) provided in a unit side coupling surface (2a) of an accessory unit (2) includes a hook portion main body (14), which is formed with a movable claw (23a) and a pressed piece (22), and a straight spring (15), slidably accommodates the hook portion main body (14) in a main body accommodation concave portion (16) formed in the unit side coupling surface (2a), and accommodates the straight spring (15) in a spring accommodation concave portion (17a) formed in the unit side coupling surface (2a) so as to be orthogonal to a sliding direction of the hook portion main body (14), with a middle portion in a length direction of the spring being engaged with the hook portion main body (14). When the hook portion main body (14) is slid in a disengaging direction which brings the movable claw (23a) and a hooking hole (8a) of an electromagnetic contactor (1) into a disengaged state by pressing the pressed piece (24), an elastic restoring force of the straight spring (15) elastically deformed into a bow-like shape acts on the hook portion main body (14) in a direction opposite to the disengaging direction.
摘要:
In an electromagnetic contact device, having a contactor holder 40 which moves a mounted movable contactor 42a according to displacement of a movable core 32 forming an electromagnet for operation 30, with the contactor holder 40 being accommodated together with the electromagnet for operation 30 in a case 1, the case 1 has: a lower case portion 10 which accommodates the electromagnet for operation 30; and an upper case portion 20, which engages with the lower case portion 10 while stacked on the lower case portion 10, and which accommodates the contactor holder 40 advanced for the accommodation from above. It is, in particular, preferable that the upper case portion 20 have a recess 21 which opens upward, and accommodate the contactor holder 40 which is placed on the bottom wall of the recess 21, and it is preferable that the lower case portion 10 accommodates one selected alternately between a DC-only electromagnet 30b and an AC-only electromagnet 30a.
摘要:
An extinction cover 5 is mounted on a case 4 thereby sealing an extinction chamber S. This extinction cover has an engaging-force-increased portion 5c1 which strengthens the force of engaging with the case, and an engaging-force-decreased portion 5c2 which weakens the force of engaging with the case; and in response to an increase in internal pressure in the extinction chamber due to arcing gas generation, the engaging-force-decreased portion establishes disengagement of the case and provides a gap 27, formed with the case, for linking the extinction chamber to external air, and the engaging-force-increased portion maintains engagement with the case.