JPH0620263Y2 - Mutual lock device of electromagnetic contactor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention prevents two or more electromagnetic contactors out of three or more electromagnetic contactors from being activated simultaneously. To an interlocking device for an electromagnetic contactor.

(Prior Art) For example, when performing reversible operation of an electric motor using two electromagnetic contactors, in order to prevent both electromagnetic contactors from closing at the same time due to external impact, etc. It is common to provide a mechanical interlocking device in addition to the electrical interlocking device between the electromagnetic contactors. By the way, recently, there are many cases in which three or more electromagnetic contactors are used to perform switching operation between a regular power supply and a plurality of emergency power supplies, but in this case, a plurality of electromagnetic contactors are simultaneously closed and operated. In order to prevent this, a mechanical interlocking device is required in addition to the electrical interlocking device. In such cases,
Conventionally, a plurality of mechanical interlocking devices provided between the above-mentioned two electromagnetic contactors have been combined and configured.

(Problems to be solved by the invention) However, in the above-described conventional configuration, since a plurality of pairs of electromagnetic contactors each having an interlocking device are simply provided, mechanical interlocking between all electromagnetic contactors is prevented. Not only could it not be taken completely, but there was the drawback of complicating the structure.

Therefore, an object of the present invention is to provide an electromagnetic contactor locking device capable of reliably and smoothly mechanically locking the three or more electromagnetic contactors and further simplifying the structure. It is in.

[Structure of the Invention] (Means for Solving Problems) The interlocking device of an electromagnetic contactor according to the present invention has three or more electromagnetic contactors attached to a base, and these three or more electromagnetic contactors are attached. Displacement members that are displaced according to the operation of the respective electromagnetic contactors are attached to the movable part of the container, and each of the three or more electromagnetic contactors is provided with a rotatable roller corresponding to and adjacent to each other. A plurality of actuating members that are moved in a direction orthogonal to the displacement members according to the displacement of the displacement members are provided, and each of the actuating members has an inclined portion on a side facing the displacement member in a non-rotating portion. At the same time, when one of the displacement members is displaced, abuts and is pressed against these inclined portions, the plurality of actuating members move and a shape that prevents the displacement of the other displacement members beyond a predetermined level is formed. It is characterized by the structure that it has.

(Operation) According to the interlocking device of the electromagnetic contactor of the present invention, when one of the three or more electromagnetic contactors is activated, it is attached to the movable part of the electromagnetic contactor. The displacement member is displaced and the plurality of actuating members are moved in a direction orthogonal to the displacement member so that the other displacement members cannot be displaced. In this case, the actuating member moves via the roller when the displacement member comes into contact with the inclined portion, so that the actuating member can be reliably moved with a small force. The members do not interfere with each other's displacement or movement.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, in FIGS. 1 and 2, 1 is a base as a base, and three or more electromagnetic contactors 2a, 2 are provided on the upper surface of the base.
b and 2c (only three are shown) are attached. Since these electromagnetic contactors 2a, 2b, 2c have the same structure, the electromagnetic contactor 2a will be described here as a representative. That is, the electromagnetic contactor 2a can be separated by a case 3a attached to the base 1, a fixed iron core 5a attached to the case 3a and wound with a coil 4a, and attracted to the fixed iron core 5a and separated by a return spring (not shown). Movable iron core 6a provided in
And a fixed mold 7a attached to the case 3a, and a movable mold 9a as a movable portion which is connected to the movable iron core 6a via a connecting pin 8a and is guided by the fixed mold 7a. In this case, although not shown, the fixed contact is attached to the fixed mold 7a and the movable contact is attached to the movable mold 9a, and the movable contact is fixedly contacted as the movable mold 9a descends and rises. It is designed to approach and leave the child. Reference numeral 10a denotes a displacement member corresponding to the electromagnetic contactor 2a, which has a rod shape, and an engaging recess 11a formed at the upper end engages with an engaging portion 12a formed at the side of the movable mold 9a. As a result, the movable mold 9a is vertically displaced according to the vertical movement of the movable mold 9a. Then, the tapered lower end 10a _{a of} the displacement member 10a penetrates the base 1 and projects downward (see FIG. 4). Regarding the other electromagnetic contactors 2b and 2c, the same parts as those of the electromagnetic contactor 2a are indicated by subscripts b and c instead of the subscript a of the reference numerals. Reference numeral 13 is a lower base to which the base 1 is attached. 14a, 14b, 14
Reference numeral c denotes an actuating member located below the electromagnetic contactors 2a, 2b, 2c and placed on the lower base 13, and each of these has two shafts 15a, 15b, as shown in FIG. 15
Rollers 16a, 16b, 16c are fitted to c, respectively, so that they can move leftward and rightward on the lower base 13. At the upper ends of the left and right ends of these actuating members 14a, 14b, 14c, the inclined portions 1 corresponding to the lower ends 10a _a , 10b _a , 10c _a of the displacement members 10a, 10b, 10c are provided.
4a _a , 14b _a , 14c _a are formed, and the upper surface portions 14a _b , 14b _b , 14c _b continuous with these are formed flat. These actuating members 14a, 14b, 1
4c is a pin 13 whose both ends are erected on the lower base 13.
The return springs 17, 17 supported by a, 13a are always urged to the original position, that is, the central position so that the adjacent ends are in contact with each other. Then, the adjacent actuating members 14a,
14b, 14c inclined portions 14a _a , 14b _a , 14c _a
The recess formed by is located below the displacement members 10a, 10b, 10c. In addition, 18 ..., A plurality of guide pins for actuating members 14a, 14b, 14c which are erected on the lower base 13, 19 are rollers 16a attached to the lower base 13 via spacer members 20, 20. 16b,
It is a floating prevention plate for 16c.

Next, the operation of the above configuration will be described.

When the coil 4a of the electromagnetic contactor 2a at the right end is energized from the power-off state shown in FIG. 4, the movable iron core 6a is attracted to the fixed iron core 5a against a return spring (not shown), and the movable mold 9a is moved. Is moved downward. As a result, the movable contactor (not shown) attached to the movable mold 9a comes into contact with the fixed contactor (not shown) attached to the fixed mold 7a, and the electromagnetic contactor 2a is activated. In addition, the engaging recess 12 of the displacement member 10a is provided in the engaging portion 12a of the movable mold 9a.
Since 1a is engaged, the displacement member 10a moves downward as shown in FIG. 5 in conjunction with the downward movement of the movable mold 9a, and the lower end 10a _a of the displacement member 10a is a non-rotating portion of the operating member 14a. Side slanting portion 14a _a is slidably contacted and actuating members 14a, 14b and 1 against the elastic force of the return spring 17.
4c is moved to the left. These actuating members 14a, 1
The movement of 4b and 14c, the upper surface portion 14a _b of the actuating member 14a corresponds to the lower side of the displacement member 10b, the operating member 1
Upper surface portion 14b _b of 4b corresponds to the lower side of the displacement member 10c. In this case, the displacement member 10b and 10c is also moved downward their lower end actuating member 14a as shown by two-dot chain lines, 14b upper surface portion _14a b of, because abuts the 14b _b, the displacement members 10a and 10c More than a predetermined amount of downward displacement is disabled, and the displacement is substantially prevented. Therefore, two or more electromagnetic contactors 2a, 2b,
2c does not become active at the same time. After that, when the coil 4a of the electromagnetic contactor 2a is cut off, the movable iron core 6a is separated from the fixed iron core 5a by a return spring (not shown), and the movable mold 9a is moved upward. As a result, the movable contact (not shown) attached to the movable mold 9a is separated from the fixed contact (not shown) attached to the fixed mold 7a. Contrary to the above, the displacement member 10a moves upward in association with the upward movement of the movable mold 9a, and the lower end portion 10a _{a of} the displacement member 10a moves upward to the inclined portion 14a _{a of the} operating member 14a.
Get out of. Then, the elastic force of the return spring 17 causes the operating members 14a, 14b, and 14c to return to their original positions shown in FIG. As a result, the displacement members 10a and 10c of the other electromagnetic contactors, for example, the electromagnetic contactors 2a and 2c can be displaced.

Further, when the electromagnetic contactor 2b at the center is activated from the power-off state shown in FIG. 4, the displacement member 10b moves downward as shown in FIG.
0b _a is the inclined portion 14a _a , 1 of the operating member 14a, 14b
4b _a is slidably contacted, and the actuating member 14a is moved rightward against the elastic force of the return spring 17, and the actuating members 14b and 14c are moved leftward. These operating members 14
a, the movement of 14b and 14c, the upper surface portion 14a _b of the actuating member 14a corresponds to the lower side of the displacement member 10a, the upper surface portion 14b _b of the actuating member 14b corresponds to a lower portion of the displacement member 10c. In this case, the displacement members 10a and 10c is also moved downward their lower end actuating member 14a as shown by two-dot chain lines, 14b upper surface portion _14a b of, because abuts the 14b _b, the displacement members 10a and 10c The downward displacement of is substantially blocked. Therefore, two or more, for example, the electromagnetic contactors 2a, 2b, 2c are not activated at the same time.

As described above, according to this embodiment, when one electromagnetic contactor, for example, the electromagnetic contactor 2b is activated, the displacement member 10b is moved.
The lower end 10b _a actuation member 14a in response to the displacement,
14b, the operating members 14a, 14b and 14c are slidably brought into contact with the inclined portions 14a _a , 14b _a of the upper surface 14
a _b, because 14b _b is adapted to prevent the downward displacement of the other displacement member 10a and 10c, it can be prevented that two or more electromagnetic contactors 2a, 2b, 2c is in operation at the same time , It is possible to ensure mechanical mutual lock. Moreover,
Displacement members 10a, 10 are attached to the electromagnetic contactors 2a, 2b, 2c.
b and 10c are provided, and these displacement members 10a, 10b,
Actuating members 14a, 14b and 14 depending on the displacement of 10c
Since only c is moved, the structure is simple and the overall size can be reduced. In addition, each of the displacement members 10a, 10b and 10c includes an actuating member 14a, 14b.
b and 14c, which are non-rotating parts, inclined portions 14a _a , 14
b contact and pressed to _a to these rollers 16a, 16
Since it is moved via b and 16c, the operating member 14
Since the a, 14b and 14c can be smoothly operated, and the displacement members 10a, 10b and 10c do not contact the rollers 16a, 16b and 16c which are rotating parts, the rollers 16a, 16b and 16c are damaged. And therefore the rollers 16a, 16b and 1
It is not necessary to use a material having a high hardness of 6c.

Although three electromagnetic contactors are attached to the base 1 in the above embodiment, three or more electromagnetic contactors, for example, four electromagnetic contactors may be attached. As shown by the dotted line, the displacement member 1 of the fourth electromagnetic contactor
The lower end 10d _a of 0d to the inclined portion 14c of the operating member 14c.
_It may correspond to _a .

[Effects of the Invention] As is apparent from the above description, the present invention attaches displacement members to the movable parts of three or more electromagnetic contactors attached to the base, and operates according to the operation of each electromagnetic contactor. The displacement member is displaced to move a plurality of actuating members in a direction orthogonal to the displacement member, and the displacement member is brought into contact with and pressed against an inclined portion which is a non-rotating portion of the actuating member to move the actuating member. Since it is configured to move via rollers, it is possible to reliably and smoothly perform mechanical interlocking between three or more electromagnetic contactors, and it is possible to simplify the configuration. is there.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view showing a part of the whole by breaking it, FIG. 2 is a side view of the whole, and FIG. 3 is a top view of an operating member part. 4, 5, and 6
The figures are side views of the operating member portion in different states. In the figure, 1 is a base (base), 2a, 2b and 2c are electromagnetic contactors, 9a, 9b and 9c are movable molds (movable parts), 1
0a, 10b, 10c are displacement members, 14a, 14b, 1
Reference numeral 4c indicates an actuating member, 14a _a , 14b _a and 14c _a indicate inclined portions, and 16a, 16b and 16c indicate rollers.

Claims (1)

[Scope of utility model registration request] 1. A base, three or more electromagnetic contactors attached to the base, and movable parts of the three or more electromagnetic contactors, each of which is attached to a movable part to operate the electromagnetic contactors. Corresponding to the three or more electromagnetic contactors, and rollers provided respectively adjacent to each other and rotatable, respectively, and are orthogonal to them according to the displacement of the displacement member. A plurality of actuating members that are moved in the direction, each actuating member has an inclined portion on the side facing the displacement member in the non-rotating portion, and the inclined member has a slanted portion. An electromagnetic contactor, characterized in that one of the plurality of actuating members is moved when one of them is displaced, abuts and is pressed so that the other displacement member cannot be displaced more than a predetermined amount. Mutual lock device.