JPH022252B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in electromagnetic switches, in which each functional unit of an electromagnetic switch, such as a contact part, an electromagnet part, and an overcurrent relay part, is arranged independently, and each functional unit is independently arranged. It can be disassembled and reassembled or replaced, and furthermore, an external drawer shaft for the main circuit and operation circuit is provided independently from each functional unit.

In conventional electromagnetic switches, each functional unit is assembled integrally and three-dimensionally, and because they are interconnected, disassembly and reassembly cannot be done partially but must be done entirely. Terminals are attached to each functional unit, and their positions are not always aligned, so external connection wires must be connected and disconnected each time they are disassembled and reassembled, resulting in disadvantages such as incorrect wiring and long work times. It was hot.

The present invention provides an electromagnetic switch that eliminates these drawbacks.

The present invention will be explained below.

1 to 5 show embodiments of the present invention,
Figure 1 is a front view, Figure 2 is a vertical side view, Figure 3 is a rear view, Figure 4 is a sectional view taken along the line D-D' in Figure 1, and Figure 5 is also taken along the line E-E'. FIG.

In the figure, a partition wall 1a is provided on the back side of one base, the partition wall 1a separates the front surface and the back surface, and the front surface side is partitioned into several rooms by partition walls 1b to 1e provided upright from the partition wall 1a.
Each chamber is designed to incorporate a device section with each function. That is, the contact part A is accommodated in the recess 101 formed in the section between the partition walls 1b and 1c, the electromagnet part B is accommodated in the recess 102 formed in the section between the partition walls 1c and 1d, and the contact part A is accommodated in the recess 101 formed in the section between the partition walls 1c and 1d. The overcurrent relay section C is housed in a recess 103 formed in the section. Depending on the case, the partition walls 1b to 1e can be replaced by walls of the unit case to which they are attached.

The contact part A fits the contact part case 2 into a recess 101 formed in a section between the partition walls 1b and 1c.
A movable rod 4 equipped with a plurality of movable contacts 3 is slidably housed in the contact case 2, and a fixed contact 5 that faces the movable contact 3 and moves toward and away from it. The end 5a of the stationary contact 5 that extends outside the case 2 and toward the base 1 constitutes a plug-in blade. A recess 104 is formed on the right side) facing the plug-in blade 5a, and the plug-in blade receiver 6 is installed within this recess 104.
When the contact portion A is fitted into the recess 101, the plug-in blade 5a is engaged and connected to the plug-in blade receiver 6. A terminal 61 is provided which penetrates the partition wall 1a further than the plug-in blade receiver 6 and is exposed on the back side. The movable rod 4 is provided with a protrusion 4a that protrudes through the contact case 2.

In the electromagnet part B, the movable core 8, the excitation coil 7, and the fixed core 9 are sequentially fitted into a recess 102 formed in a section between the partition walls 1c and 1d. Recesses 101, 1 in which these contact portions A and electromagnet portions B are attached
02 (left side in Figure 2) with a common cover 11
1 to hold the interior parts and prevent them from coming off.

By doing so, once the cover 111 is removed, the internal contact part A and the electromagnet part B can be easily attached and detached without any tools. In this state, the movable rod 4 of the contact part A can slide in the horizontal direction as shown in FIG. When the movable iron core 8 is held and the excitation coil 7 is excited, the movable iron core 8 is attracted to the fixed iron core, moves to the left in FIG. 2, and returns when demagnetized.

The movable iron core 8 is connected to the movable rod 4 via a link lever 11, and the movable rod 4 is driven in response to suction and release of the movable iron core 8, so that the contacts move toward and away from each other. As shown in FIG. 6, the link lever 11 has both legs 11a and a center leg 11b at a roughly U-shaped base, and a projecting piece 11d at the tip of an extension 11c extending the center leg 11b in one direction. has been established. 11e is a hole for pivotally supporting the link lever 11 on the base 1, and 11f is a projecting piece provided in the middle of the extension portion 11c for engaging the return spring 43. The tips of both legs 11a are engaged with a connecting pin 10 attached to the movable iron core 8, and the protruding piece 11d is pivotally engaged with the protruding portion 4a of the movable rod 4. The link lever 11 is rotatably supported on the base 1 by a pin 12 inserted through a hole 11e, and a return spring 43 is provided between the protrusion 11f and the base 1.
is installed. When the movable iron core 8 is attracted, both legs 11a of the link lever are pushed by the connecting pin 10 and rotated around the shaft support hole 11e in the direction of arrow K in FIG. 6, and the protrusion 11d is rotated in the direction of arrow L. It rotates to drive the movable rod. The protruding piece 11f is always urged in the direction of the arrow M by the return spring 43, and when the excitation of the movable iron core 8 is released, the link lever 11 and, accordingly, the movable iron core 8 are returned to their original positions.

The overcurrent relay section C has a relay case 13 fitted into a recess 103 formed between the partition walls 1d and 1e, and a main bimetal 14, a heating heater 15, an auxiliary bimetal 16,
It houses the interlocking plate 17 and the detection mechanism C'. The base ends of the main bimetals 14 are attached to the terminal plates 18, and the ends 18a of the terminal plates 18 are attached to the case 13.
The base 1 is provided with a recess 105 in a portion facing the plug-in blade 18a, and the recess 10
A plug-in blade holder 19 is installed within 5. When the overcurrent relay section C is fitted into the recess 103 of the base, the plug-in blade 18a is fitted into the plug-in blade receiver 19. The heater 15 is wound around the main bimetal 14, one end of which is fixed to the low expansion side of the main bimetal 14, and the other end connected to the load side main circuit terminal 30 provided on the upper front side of the relay case 13. Ru. The interlocking plate 17 is provided with protrusions 17a and 17b that engage with the movable end of each main bimetal 14.
driven by. An end 17c of the interlocking plate 17 is engaged with one end 16a of the auxiliary bimetal 16, and the movement of the interlocking plate 17 operates the detection mechanism C' via the auxiliary bimetal 16.

The detection mechanism C' is constructed as follows. The center part of the auxiliary bimetal 16 is rotatably supported by the adjustment fitting 20, and the upper end thereof is connected to the claw part 24 of the movable contact 24.
engages a. This movable contactor 24 is connected to the case 1
It is rotatably supported by a pin 21 on a base 22 fixed to 3. Upper end 20 of adjustment fitting 20
a swingably engages with the end portion 22a of the base 22. Base 2 extended to the outside of the back side of the case 13
The other end of the blade 2 constitutes a plug-in blade and is fitted into a plug-in blade receiver 23 provided on the base 1. In this case, the plug-in blade of the base 22 has the same structure as the plug-in blade 18a, and the plug-in blade holder 23 has the same structure as the plug-in blade holder 19, respectively.
Figures and detailed descriptions are omitted.

A fixed contact 25 faces the movable contact 24.
will be established. Fixed contact 25 is fixed to case 13. 26 is an adjustment dial for adjusting the operating current value of the overcurrent relay section C; a shaft 26a provided at the upper part of the case 13 and protruding into the case 13 is screwed into the base 22; The tip thereof faces the other end of the adjustment fitting 20. When the adjustment dial is rotated, the shaft 26a is moved back and forth by a screw, and its tip pushes the adjustment fitting 20 to swing it, thereby changing the central support position of the auxiliary bimetal 16 and adjusting the operating current value.

Reference numeral 27 denotes a reset button for returning the movable contact 24. Its upper end engages with the movable contact 24 (not shown), and its lower end extends outside the case 13 and further penetrates the base 1. Extracted to the outside. When the overcurrent relay part C performs a detection operation and the auxiliary bimetal 16 disengages from the claw part 24a of the movable contact 24 and the contact between the movable and fixed contacts 24 and 25 is released, the reset button is pressed. When the lower end of the movable contact 27 is pulled, the upper end pushes the left side of the movable contact 24 in FIG. let

A power supply side main circuit terminal 28 is provided on the base 1 near the contact portion A, an operating circuit terminal 29 is provided on the base 1 near the electromagnet portion B, and a load side main circuit terminal 30 is provided near the overcurrent relay portion C, respectively. These external connection terminals 28, 29, and 30 are provided independently from the functional unit and can be separated. However, there are cases where the overcurrent relay is connected to a functional unit in consideration of its influence on the operating characteristics, and this embodiment also shows a case where the case 13 is provided with the load-side main circuit terminal 30 and directly connected. External connection lines are external connection introduction holes 1f, 1g, and 1h of base 1 (shown in Figures 1 and 2).
insert it further and connect it to the external connection terminals 28, 29, and 30. The introduction holes 1f, 1g, and 1h are blinded with a thin membrane before use (as shown in FIG. 2) and are perforated as appropriate during use.

FIG. 7 shows a wiring circuit diagram of an electromagnetic switch according to the present invention. First, the wiring of the main circuit is connected to the power supply side main circuit terminals 28a, 28b, 28 for each of the first, second, and third phases.
c is connected to each phase plug-in blade receiver 6a, 6b, 6c of the contact portion A using conductive wires 31, 32, and 33, respectively. From the power supply side plug-in blade holders 6a, 6b, 6c, through the power supply side plug-in blades 5a, 5a, 5a,
It is connected to the power supply side fixed contacts 5, 5, 5 of the contact part A, and is connected to the load side plug-in blades 5a, 5 via the movable contacts 3, 3, 3 and the load side fixed contacts 5, 5, 5.
a, 5a, and then the load side plug-in blade receiver 6
Connected to a', 6b', 6c'. Plug-in blade holder 6
a, 6c' are connected to the plug-in blade receivers 19a, 19c of each phase of the overcurrent relay C by conductors 34, 36, and then connected to the load-side main circuit terminal 30a, via the plug-in blades 18a, 18a, and the heaters 15, 15. 30
Connect to c. Further, the plug-in blade receiver 6b' is connected to the load side main circuit terminal 30b by a conductor 35.

Next, the wiring of the operation circuit is connected to the operation circuit terminal 29a,
Conductors 37, 38, 3 from 29b and 29c, respectively
9 to the power supply side main circuit terminal 28a and the plug-in blade receivers 6d and 6d' of the contact portion A, respectively.
Plug-in blade 5a on the power side from the plug-in blade holder 6d
, it is connected to the power supply side fixed contact 5 of the contact part A, passes through the movable contact 3 and the load side fixed contact 5 to the load side plug-in blade 5a, and is further connected to the load side plug-in blade holder 6d'. be done. In this case, the operating circuit contact portion is structured to share the same components as the main circuit contact portion. In addition, the power supply side main circuit terminal 28b is connected to the plug-in blade receiver 23 of the overcurrent relay section C by a conductor 40, and the lead wires 41 and 42 led out from the excitation coil 7 of the electromagnet section B are connected to the operation circuit terminal 29c. Each is connected to the fixed contact 25 of the overcurrent relay section C. Lead wires 41, 42 of coil 7
The distal end portion is formed in a plug-in type (as shown in FIG. 1), and is inserted into plug-in blade holders formed on the terminal 29c side and the fixed contact 25 side, so that it can be attached and detached with a single touch.

In the above, the wirings 31 to 40 are performed on the back surface of the base, and FIG. 3 shows the actual connection state.

The present invention provides an electromagnetic switch having functional units of a contact part and an electromagnet part. The contact part is arranged such that a contact part case is fitted into the first recess, a movable rod equipped with a movable contact is slidably housed in the contact part case, and the contact part case is fitted with a contact part case. The is further equipped with a fixed contact that faces the movable contact and moves toward and away from the movable contact, and the end of the fixed contact extends to the outside of the contact case and toward the base to form a plug-in blade. A plug-in blade holder is provided at the bottom of the first recess so as to face the plug-in blade, and the electromagnet part is configured to fit and fit a movable iron core, an excitation coil, and a fixed iron core into the second recess, and contact these. A cover covers the front surface of each of the recesses to which the contact part and the electromagnet part are mounted, and a link lever is provided spanning between the contact part and the electromagnet part, and the link lever has its base pivoted on the base and its base part It has a leg extending from the base in a direction perpendicular to the support shaft, an extension part extending from the base in parallel to the support shaft, and a projecting piece provided on the extension part, and the tip of the leg has a , engages with a connector attached to the movable core in a direction in which the link lever is rotated when the movable core is attracted;
The projecting piece of the extension part engages in the direction of driving the movable rod, a return spring is installed between the link lever and the base, and the external extraction terminal of the contact part is provided on the base side. , is connected to the plug-in blade receiver, and the excitation coil of the electromagnet part is connected to the operation circuit terminal in the electromagnetic switch via a one-touch connection terminal such as a plug-in type, so that the contact part and the electromagnet are connected to each other. Each functional unit of the unit can be configured to be detachable independently, and each functional unit can be configured to be detachable regardless of the external lead terminal, which not only facilitates disassembly and assembly.
Repairs and replacements of contact parts and electromagnet parts during maintenance and inspection can be carried out independently of other functional units, and can be completed in a short time. Further, as an embodiment in which each functional unit can be attached and detached independently, each functional unit is arranged in a two-dimensional manner.

○B Wire the internal wiring between each functional unit and the external lead-out terminal on the back side of the base on which each functional unit is installed.

○C The connection between each functional unit and internal wiring should be a plug-in type.

As a result, external wiring becomes easy, erroneous connection can be prevented, and a thin electromagnetic switch that can be maintained, inspected, and repaired without connecting or disconnecting external connection wires can be obtained.

It should be noted that the present invention can be applied not only to each functional unit but also to some units within the scope without changing the gist thereof.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view;
Figure 2 is a vertical side view, Figure 3 is a rear view, Figures 4 and 5 are sectional views showing the main parts of Figure 1, and Figure 4 is a rear view.
The figure is a D-D' arrow view, Figure 5 is an E-E' arrow view, and Figure 6 is a view from an E-E' arrow.
The figure is a perspective view of the link lever, and FIG. 7 is a wiring circuit diagram. 1: Base, 1a, 1b, 1c, 1d, 1e:
Partition wall, 101, 102, 103: recess, 111:
Cover, 2: Contact case, 3: Movable contact,
4: Movable rod, 5: Fixed contact, 7: Excitation coil,
8: Movable iron core, 9: Fixed iron core, 11: Link lever, 13: Relay case, 14: Main bimetal,
16: Auxiliary bimetal, 17: Interlocking plate, 22: Base, 24: Movable contact, 25: Fixed contact, 2
8, 29, 30: terminal, 6, 19, 23: plug-in blade holder, A: contact section, B: electromagnet section, C: overcurrent relay section.

Claims (1)

[Scope of Claims] 1. In an electromagnetic switch having functional units of a contact part and an electromagnet part, the base of the electromagnetic switch is partitioned by a partition wall, and the contact part and the electromagnetic switch are provided in first and second recesses formed on the surface side. The electromagnet part is arranged in a plane, and the contact part has a contact part case fitted into the first recess, and a movable rod equipped with a movable contact is slidably housed in the contact part case. The contact case is further equipped with a fixed contact that faces the movable contact and moves toward and away from the movable contact, and the end of the fixed contact extends to the outside of the contact case and toward the base to form a plug-in blade. A plug-in blade holder is provided at the bottom of the first recess so as to face the plug-in blade, and the electromagnet is fitted with a movable iron core, an excitation coil, and a fixed iron core in the second recess. , the front surface of each of the recesses in which the contact portion and the electromagnet portion are mounted is covered with a cover, and a link lever is provided spanning between the contact portion and the electromagnet portion, and the base of the link lever is pivotally supported by the base. , a leg extending from the base in a direction perpendicular to the support shaft, an extension part extending from the base in parallel to the support shaft, and a projecting piece provided on the extension part, The tip part engages with a connecting tool attached to the movable core in a direction in which the link lever is rotated when the movable core is attracted, and the protruding piece of the extension part engages in a direction in which the movable rod is driven. a return spring is mounted between the link lever and the base, an external lead-out terminal of the contact portion is provided on the base side and connected to the plug-in blade holder, and an excitation coil of the electromagnet portion is an electromagnetic switch that is connected to an operating circuit terminal in the electromagnetic switch via a one-touch connection terminal such as a plug-in type. 2 Separate the base into the front and back sides with a partition wall,
Claim 1, characterized in that a terminal is provided that penetrates the partition wall of the base further than the plug-in blade receiver provided on the base and is exposed on the back surface, and the internal connection with the external lead-out terminal is made on the back surface of the base. The electromagnetic switch described in item 1. 3. Claim 1 or 3, characterized in that a plug-in terminal is provided at the tip of the lead wire of the excitation coil of the electromagnet section, and the plug-in terminal is plug-in connected to a plug-in receiving section provided at an operating circuit terminal of another section. The electromagnetic switch described in paragraph 2.