JPH0132784Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to a structure for connecting divided partial cases mainly used in storage cases for electrical equipment.

A case for an electromagnetic contactor is well known as a typical example of this type of storage case. Demand for electromagnetic contactors is increasing in the industrial world due to the increase in automation equipment and electric motor application equipment to improve production. In conjunction with the demand for greater labor savings and promptness in the necessary maintenance and inspection of electromagnetic contactors when they are used in large quantities, such as when replacing electromagnetic coils and contacts, the need for It has become necessary to make the disassembly and assembly of electromagnetic contactor cases as simple and easy as possible.

[Prior art and its problems]

As a conventional electromagnetic contactor case, for example, the case shown in FIG. 1 is known. i.e. top and bottom 2
The upper case 1 includes a fixed contact 3, a movable contact 5 supported by a contact support 4 via a contact spring 6, a movable core 7 connected to the contact support 4, and a movable core 7 attached to the contact support 4. The returned spring 10 and the like are housed therein. On the other hand, lower case 2
A fixed iron core 8 is fixed opposite to the movable iron core 7, and an electromagnetic coil 9 is inserted into the fixed iron core 8. In order to connect the upper case 1 and the lower case 2, connecting means are provided on both sides of each case joint. In the case of the storage case shown in FIG.
and protrusions 12, 13 and 12a, 13a are formed on both sides of the joint of the lower case 2, and a hole 14 is formed in the protrusions 12, 12a, and a hole 14 is formed in the protrusions 12, 12a.
3 and 13a are provided with screw holes 15, and screws 16 are used to connect the upper case 1 and the lower case 2.
According to this means, the projections 12, 1 formed on the side surfaces of the upper case 1 and the lower case 2, respectively.
2a and 13, 13a protrude from the side of the storage case, the external dimensions of the storage case increase, and when arranging a large number of electromagnetic contactors, extra space is required. To remove from case 2, use screw 6
This has the disadvantage that it takes time and effort to loosen the screw until it comes off from the screw hole 15.

In another conventional coupling means shown in FIG. 2, the walls on both sides of the upper case 1 and lower case 2 of the storage case are thickened, and the upper Screw holes 1 on both sides of case 1
5, and bases 14 are formed on both opposing walls of the lower case 2, and screws 16 are inserted from the back side of the lower case 2.
to connect upper case 1 and lower case 2. This method makes it possible to reduce the increase in external dimensions of the storage case, unlike the conventional example shown in FIG. The inconvenience of having to operate the screw 16 by turning it over causes a decrease in work efficiency.

Furthermore, in any of the conventional coupling means shown in FIGS. 1 and 2, as long as the screws 16 are used to connect the upper case 1 and the lower case 2, it takes time to tighten and loosen them, and a large number of screws are required. When dealing with electromagnetic contactors, this work time cannot be ignored, and especially when producing these, the increased cost becomes a problem.

[Purpose of invention]

This invention eliminates the above-mentioned conventional drawbacks, suppresses the increase in the external dimensions of the storage case, and provides an extremely simple structure for connecting divided partial cases to each other, which requires almost no effort and time to connect and disassemble. purpose.

[Key points of the idea]

In order to achieve the above object, according to the present invention, a storage case for electrical equipment, etc. is divided into partial cases, and the partial cases are connected to each other from the outside by a connecting means provided at a place where the partial cases are connected to each other. In the coupling structure, the coupling means includes a protrusion provided on each side of the joint between the partial cases, a presser protrusion formed with a gap on both sides of the protrusion of one partial case, and the one part. A recess formed in the protrusion of the case and provided on the opposite side of the protrusion of the other partial case, and the recess is rotatably engaged and held in the recess, and is elastically engaged with the protrusion of the other partial case. In addition, movement in a direction perpendicular to the rotational direction is achieved by constructing a coupling fitting that is restrained by the presser protrusion. This allows for one-touch connection, and the coupling fittings may be made of elastic wire and have a convex shape with an open top, or may be mouth-shaped with an open center on one side.

[Example of idea]

Figures 3 to 6 show one embodiment of this invention, and the same parts as those of the conventional example shown in Figures 1 and 2 are given the same reference numerals to avoid duplication of explanation and different parts. I will explain about it. The difference is that the upper case 1 and the lower case 2 are connected to the protrusions 22 of the upper case 1 via coupling fittings 30 that are rotatably engaged and held by the protrusions 21 provided on both sides of the lower case 2. This means that they can be combined by combining them. To be more specific, as is clear from FIG.
The supporting projection 21a is provided with a recess 21d for supporting an open end of a coupling fitting 30, which will be described later. In this embodiment, the projections 22 include an engagement projection 22a having the same width as the support projection 21a, and a slide guide 22 provided on the upper surface of the engagement projection 22a and projecting at right angles to the wall surface of the upper case 1 and having an arc shape.
b, and an engagement groove 22c formed in the engagement protrusion 22a and provided on the side of the protrusion 21 opposite to the side that contacts the support protrusion 21a. The coupling fitting 30 is made of an elastic wire, and is bent into a convex shape with the top part fitted into the recess 21d of the protrusion 21 serving as an open end 30a. The open end 30a is fitted into the recess 21d, and the base 30b is inserted into the gap 21b during connection, which will be described later.
Inserting support protrusion 21a and engagement protrusion 22
a, and the rotation by the presser protrusion 21c and movement in the direction perpendicular to it are prevented.
The bottom part 30c of the coupling fitting 30 is provided with a supporting protrusion 21.
a and the engaging protrusion 22a are axially symmetrical to balance both sides, and are formed to have an internal stress that can cope with the maximum load expected at the time of coupling. Moreover, this bottom part 30c can be joined by pushing it along the slide guide 22b by hand without using a special tool, or by pinching both ends of the bottom part 30c.
The connection can also be removed by bending. The holding projection 21c prevents the opening end 30a from being deformed and removed from the recess 20d when the coupling fitting 30 is pulled in the direction of arrow _F as shown in FIG. There is. In this way, the coupling fitting 30 is engaged with the lower case 2 so as not to fall off. Upper case 1 and lower case 2
To connect the upper case 1 to the lower case 2, simply place the upper case 1 on the lower case 2, rotate the coupling fitting 30 in the direction of the arrow A in FIG. 3, and fit the bottom of the coupling fitting 30 into the engagement groove 22c. During the fitting process, the slide guide 22b guides the coupling fitting 30 to help reduce the insertion force. To release the connection, pinch both ends of the bottom 30c of the connection fitting 30 and remove the bottom 3.
The connection is released by bending 0c.

Figure 7 shows another embodiment of this invention.
By forming the coupling fitting 31 into a mouth shape, the shape is simplified, and by appropriately selecting the wire material, wire diameter, and curvature, the same effects as those of the above-mentioned embodiments can be obtained. .

[Effect of idea]

According to this invention, a coupling fitting is formed from an elastic wire, a protrusion, a presser protrusion, and a recess are formed on one of the divided partial cases, and a supporting protrusion with a slide guide is formed on the other partial case, thereby achieving a stable connection. By making it possible to apply force during connection and removal without the need for tools, the parts have a split structure, which greatly reduces assembly time and maintenance and inspection without increasing external dimensions. A structure in which the cases are connected to each other is obtained.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of an electromagnetic contactor employing a conventional coupling structure; Fig. 2 is a fragmented sectional view of an electromagnetic contactor employing another conventional coupling structure; Figs. 3 to 6; shows an electromagnetic contactor that employs an embodiment of this invention, FIG. 3 is a longitudinal cross-sectional view of the same, FIG. 4 is an enlarged view of the main parts of FIG. An exploded perspective view of the main parts of the figure, Figure 6 is the − of Figure 5.
FIG. 7 is a sectional view taken along a line corresponding to FIG. 6 of another embodiment of this invention. 1... Upper case, 2... Lower case, 21,
22... Protrusion, 21c... Presser protrusion, 30, 31
...Connection fitting, 30a...opening.

Claims (1)

[Claims for Utility Model Registration] 1. In a structure in which partial cases are connected from the outside by a connecting means provided at a location where a storage case for electrical equipment is divided into partial cases and is connected to each other, The means are
A projection provided on each side of the joint between the partial cases, a presser projection formed with a gap on both sides of the projection of one partial case, and a presser projection formed on the projection of the one partial case and the other portion. A recess provided on the side opposite to the protrusion of the case, and a part that is rotatably engaged and held in this recess, engages with the protrusion of the other partial case with elastic force, and cannot be moved in a direction perpendicular to the rotation. A structure for connecting divided partial cases to each other, characterized in that the structure comprises a connecting metal fitting restrained by the presser protrusion, and enables one-touch connection. 2. Utility model registration Claim 1: The coupling structure for mutually divided partial cases, characterized in that the coupling fitting is made of an elastic wire and formed in a convex shape with an open top.