JPH073564Y2 - Electromagnetic contactor - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to mounting a surge absorber on an electromagnetic contactor that suppresses an arc generated between contacts of the electromagnetic contactor when a main circuit is opened and closed by the electromagnetic contactor. Regarding the structure.

[Conventional technology]

Conventionally, as a surge absorber for a three-phase main circuit, there is known a surge absorber having a series circuit of a resistor and a capacitor and connected in a delta connection in a case. As a mounting structure for this surge absorber to an electromagnetic contactor, a concave engaging portion is provided on a side surface of the electromagnetic contactor, a convex engaging portion is provided on a side surface of the surge absorber, and a convex engaging portion of the surge absorber is provided. It is known that the surge absorber is attached to the side surface of the electromagnetic contactor by engaging with the concave engagement portion of the electromagnetic contactor.

[Problems to be solved by the device]

In the electromagnetic contactor, the movable iron core is configured to be sucked and released by the fixed iron core, so that vibration occurs when the electromagnetic contactor operates. For this reason, the vibration is transmitted to the surge absorber attached to the electromagnetic contactor, so that the surge absorber must be firmly fixed and held. For this reason, when mounting the electromagnetic contactor on a control panel using screws, the surge absorber is mounted on the electromagnetic contactor so that the bottom surface of the surge absorber contacts the screw mounting surface of the electromagnetic contactor, that is, the panel surface. . However, as a method of mounting the electromagnetic contactor to the panel, there is a rail mounting method of mounting the electromagnetic contactor on a rail installed on the panel in addition to the screw mounting method. The electromagnetic contactor itself has a structure that allows both screw mounting and rail mounting, but if you try to rail mount the electromagnetic contactor mounted so that the bottom of the surge absorber contacts the screw mounting surface. Since the rail protrudes from the board surface, there is a problem that the surge absorber interferes with the rail mounting. It is not a good idea to mount the surge absorber on the electromagnetic contactor in two ways: rail mounting and screw mounting. Therefore, if the surge absorber is mounted on the electromagnetic contactor with a gap between the bottom surface of the surge absorber and the screw mounting surface so that it can be mounted on the rail, the surge absorber will float in the air. The vibration of the contactor is transmitted to the surge absorber, and an excessive force is applied to the engaging portion between the surge absorber and the electromagnetic contactor. Therefore, if the engaging portion between the surge absorber and the electromagnetic contactor is simply fitted, the surge absorber may fall off, and the structure of the engaging portion becomes complicated and expensive.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electromagnetic contactor which eliminates the above-mentioned conventional drawbacks and has a simple structure of the engaging portion between the surge absorber and the electromagnetic contactor and which can be screw-mounted and rail-mounted.

[Means for solving the problem]

According to the present invention, an object of the present invention is to provide an electromagnetic contactor in which a surge absorber having a surge absorbing element corresponding to each phase of a three-phase main circuit and having a lead wire connected to the surge absorbing element is attached. A concave or convex engaging portion is provided on the side surface adjacent to the terminal portion to which the main circuit conductor of the container is connected,
A convex or concave engaging portion corresponding to the concave or convex engaging portion is provided on the side surface of the surge absorber case, and the surge absorber case is in contact with the screw mounting surface of the electromagnetic contactor and This is achieved by forming a protrusion that is disposed across the mounting rail and a seat surface that abuts the rail mounting surface of the electromagnetic contactor.

[Action]

Mounting of the surge absorber on the electromagnetic contactor is performed by fitting the corresponding convex engagement portion and concave engagement portion,
When mounting the electromagnetic contactor with the surge absorber mounted on the control panel with screws, the protrusion provided on the surge absorber case abuts the screw mounting surface to hold the surge absorber, and the surge absorber is mounted. When the electromagnetic contactor is mounted on the rail, the seat surface of the surge absorber case comes into contact with the rail to hold the surge absorber.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to the drawings. 1 and 2 respectively show an embodiment of the present invention.

In FIGS. 1 (A) and 1 (B), reference numeral 1 denotes a surge absorber case, and the surge absorber case 1 has a built-in surge absorption element formed of a series circuit of a resistor and a capacitor (not shown) and connected in a delta connection. The lead wires L _{1 to} L ₃ connected to the vertices of the delta connection are pulled out. As shown in FIGS. 2 (A) and 2 (C), two convex engaging projections 2, 2 are formed on the side surface of the surge absorber case 1, and engage on the bottom surface side of the surge absorber case 1. Protrusions 3, 3 are formed on both side faces adjacent to the side face on which the protrusions 2, 2 are formed. As shown in FIG. 2 (C), the protrusions 3, 3 have notches 3a,
The lead wires L _{1 to} L ₃ are drawn out through the notch 3a as shown in FIG. 1 (B). A seating surface 4 is further formed on the bottom surface side of the surge absorber case 1. Reference numeral 5 denotes an electromagnetic contactor, which includes a terminal portion 51 to which a main circuit conductor is connected, a screw mounting portion 52 on a diagonal line on the bottom side, and a rail mounting recess shown in FIG. 1 (B). With 53. The rail mounting recess 53 is provided with a fixed protrusion 53 and a slider protrusion 54 with which one end of the U-shaped rail 6 is engaged. Further, on one side surface of the electromagnetic contactor 5, concave engagement grooves 5a, 5a corresponding to the two engagement projections 2, 2 of the surge absorber case 1 are formed. The engagement grooves 5a, 5a are not formed on the entire side surface of the electromagnetic contactor 5 as shown by the dotted line in FIG. 1 (A), and have a length that matches the length of the engagement protrusion 2. is there.

Attach the surge absorber case 1 to the electromagnetic contactor 5 from the bottom side of the electromagnetic contactor 5 with the engaging protrusions 2, 2 of the surge absorber 1.
To the engagement grooves 5a, 5a, and then surge absorber case 1
Is slid to the upper surface side of the electromagnetic contactor 5. When the surge absorber case 1 is attached to the electromagnetic contactor 5, the tip of the protrusion 3 of the surge absorber case 1 is located on the screw mounting surface 7, and the seat surface of the surge absorber unit 1 is the upper surface of the U-shaped rail 6. Since it abuts against the rail, the surge absorber case 1 is held on the screw attachment surface 7 by the protrusions 3 and 3 when the screw is attached, and the surge absorber case 1 is held by the bearing surface 4 and 4 when the rail is attached. Held in.

[Effect of device]

As described above, according to the present invention, the surge absorber can be attached to the electromagnetic contactor only by fitting the corresponding concave and convex portions, so that the structure is simple and the surge absorber can be absorbed. The mounting of the electromagnetic contactor with screws and rails is possible by providing the protrusion and seat surface on the container, and the surge absorber can be removed by making the protrusion and seat surface contact the screw mounting surface and rail. It has the advantage that it can be prevented.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, respectively. FIGS. 1A and 1B are a front view and a side view of an electromagnetic contactor equipped with a surge absorber, and FIG. FIG. 2A shows a surge absorber case, FIG. 2A is a front view of the surge absorber case, FIG. 2B is a side view seen from the arrow P direction in FIG. 2A, and FIG. ) Is a side view seen from the Q arrow direction in FIG. 2 (A). 1: Surge absorber case, 2: Engagement projection, 3: Projection, 4: Seat surface, 5: Electromagnetic contactor, 6: Rail, 7: Screw mounting surface.

Claims (1)

[Scope of utility model registration request] 1. An electromagnetic contactor to which a surge absorber having a surge absorbing element corresponding to each phase of a three-phase main circuit and having a lead wire connected to the surge absorbing element is attached.
A concave or convex engaging portion is provided on the side surface adjacent to the terminal portion to which the main circuit conductor of the electromagnetic contactor is connected, and a convex shape corresponding to the concave or convex engaging portion is provided on the side surface of the surge absorber case. Alternatively, a concave engagement portion is provided, and the surge absorber case is brought into contact with the screw mounting surface of the electromagnetic contactor and the projection portion arranged across the mounting rail of the electromagnetic contactor and the rail mounting surface of the electromagnetic contactor. An electromagnetic contactor characterized by forming a seat surface.