JPH06139893A - Electromagnetic switch - Google Patents

Abstract

PURPOSE:To surely fit the back face side of the frame of an electromagnetic contactor to rails provided in a case in an electromagnetic switch constituted of the electromagnetic contactor and a thermal relay. CONSTITUTION:A stanchion 10 having a hook-like section 11 at the tip is planted adjacently to rails 6a, 6b on the inside bottom face of a case 3. The hook-like section 11 is coupled with the hook hole 9 of a slider 5 provided on the back face side of the frame of an electromagnetic contactor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic switch, and more particularly to a rail mounting structure for an electromagnetic switch, the back side of which is fixed to a rail.

[0002]

2. Description of the Related Art FIG. 7 is a partial cross-sectional side view of an electromagnetic switch incorporated in a conventional case, FIG. 8 is a plan view with a cover of FIG. 7 removed, and FIG. FIG. A thermal relay 2 is combined with the electromagnetic contactor 1, and a hook portion 4 and a slider 5 are provided on the back surface of the electromagnetic contactor frame. This hook 4 and slider 5
The electromagnetic contactor 1 is attached and fixed by sandwiching the two molded rails 6a and 6b on the inner bottom surface of the case 3. A cover 7 covers the opening surface of the case 3, and the electromagnetic contactor 1 and the thermal relay 2 are built therein. In FIG. 9, 8 is a spring for pressing the slider 5,
Reference numeral 9 is a hooking hole for hooking a driver tool or the like to pull back the slider 5.

[0003]

In this rail mounting structure, the bent portion at the tip of one rail 6a is fitted into the hooking portion 4 on the back surface of the electromagnetic contactor frame, and the other rail 6 is mounted.
At the bent portion of the tip of b, the tip of the slider 5 (spring 8
Of the rail 6 which engages with the slider 5 in particular, since the total weight of the electromagnetic contactor 1 and the thermal relay 2 is concentrated on the engaging portion.
If the load of the thermal relay 2 is applied to the tip of b, the tip portion of the rail 6a may be damaged due to vertical vibration or the like, and the engaging portion may be disengaged.

The object of the present invention is to solve the above-mentioned problems.
The purpose is to prevent the rail tip from being damaged and to improve the mounting structure so that the rail tip and the slider tip are not easily disengaged.

[0005]

According to the present invention, a thermal relay is combined with an electromagnetic contactor, and a hook portion and a slider formed on the back surface of the electromagnetic contactor frame are disposed on the mounting surface by molding. In an electromagnetic switch attached to and fixed to two rails, a pillar having a hook-shaped tip is planted adjacent to the rail on the mounting surface, and the hook-shaped portion is hooked on a slider. The holes were engaged. It is also possible to provide a step inside the hooking hole and engage the hook-shaped portion with the inside step. Further, a pull-back through hole may be provided adjacent to the hook hole.

[0006]

[Function] By engaging the hook-like portion of the tip of the support pillar planted on the mounting surface with the hooking hole of the slider, even if an impact such as vertical movement is applied, it is concentrated on the slider tip and the rail tip bent portion. The applied load is also distributed to the engaging portion between the hook-shaped portion and the hooking hole, so that the slider is stabilized without coming off the rail.

[0007]

1 is a partial cross-sectional side view showing an embodiment of the present invention, FIG. 2 is an enlarged view of a portion indicated by the arrow P in FIG. 1, and the same reference numerals as those in FIGS. is there. The difference of this embodiment from the conventional example is that a pillar 10 having a hooked portion 11 at the tip is planted by molding on the inner bottom surface of the case 3 as a mounting surface. FIG. 3 shows a state in which the frame of the electromagnetic contactor 1 in FIG. 2 is separated from the case 3.
The order of attaching the frame of the electromagnetic contactor 1 to the rail 6 from this state will be described.

First, the frame of the electromagnetic contactor 1 is tilted,
As shown in FIG. 5, the hook portion 4 on the back surface side of the frame of the electromagnetic contactor 1 is engaged with the bent portion at the tip of the rail 6a. Next, when the right side of the frame of the electromagnetic contactor 1 in FIG. 4 is pushed down in the direction of the arrow R, the edge of the hooking hole 9 of the slider 5 abuts the slope of the tip of the column 10, and the electromagnetic contactor 1 is moved in the direction of the arrow R. When pushed down, the slider 5 slides to the right in the figure, the tip of the column 10 penetrates the hooking hole 9 of the slider 5, and when the hooked portion 11 of the column 10 projects on the upper surface of the hooking hole 9, the slider 5 moves. The slider 8 slides to the left in the figure by the action of the spring 8, and as shown in FIG.
Is engaged with the tip of the bent portion of the tip of the rail 6b, and at the same time, the hook-shaped portion 11 of the column 10 is engaged with the hooking hole 9 of the slider 5. That is, the frame of the electromagnetic contactor 1 is connected to the case 3 in addition to the conventional engagement between the hooking portion 4 and the rail 6a and engagement between the recess 5A at the tip of the slider 5 and the rail 6b, as well as the hooked portion of the column 10. Since the engagement between the hook 11 and the hooking hole 9 of the slider 5 is added, the slider 11 can be mounted more strongly.

FIG. 5 is a cross-sectional view showing a second embodiment of the present invention, in which a step 12 is provided in the middle of the hooking hole 9 of the slider 5, and the hook 12 of the column 10 is engaged with the step 12. It was made. This is to facilitate the pulling back work of the slider 5, and when pulling back the slider 5 to the right when detaching the frame of the electromagnetic contactor 1 in the structure shown in FIG. To the left to tilt the column 10 to the left, insert a driver tool or the like between the hook-shaped portion 11 and the hooking hole 9, and operate this to release the engagement between the hook-shaped portion 11 and the hooking hole 9. However, in the case of FIG. 5, the hooked portion 1
1 is inserted into the gap above the step 12 between the hooking hole 9 and the driver tool or the like, and when this is operated, the hook 11 and the step 12 are formed.
Can be easily disengaged.

Further, in order to facilitate the pulling back of the slider 5, a hooking hole 9 is provided as in the third embodiment shown in FIG.
A through hole 13 for pulling back may be provided adjacent to.

[0011]

According to the present invention, a column having a hook-shaped portion is provided on the mounting surface adjacent to the rail provided at the tip, and the hook-shaped portion is engaged with the hooking hole of the slider, for example, the vertical direction. Even if a shock such as a motion is applied, the load concentrated only on the slider tip and the bent part of the rail tip is distributed to the engaging part between the hook-shaped part and the hook hole, and the load is halved. The electromagnetic switch composed of the electromagnetic contactor and the thermal relay is in a stable mounted state without coming off.

[Brief description of drawings]

FIG. 1 is a partial side sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion indicated by a P arrow in FIG.

FIG. 3 is a sectional view of the case of FIG. 2 and the electromagnetic contactor in a separated state.

FIG. 4 is a cross-sectional view showing a state in which a hooking portion and a rail tip bending portion are engaged with each other in FIG.

FIG. 5 is a sectional view showing a second embodiment of the present invention.

FIG. 6 is a sectional view showing a third embodiment of the present invention.

FIG. 7 is a partial side sectional view of a conventional electromagnetic switch.

FIG. 8 is a plan view showing a state where a cover is removed in FIG.

FIG. 9 is an enlarged view of a Q arrow portion in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic contactor 2 Thermal relay 3 Case 4 Hooking part 5 Slider 6a, 6b Rail 7 Cover 9 Hooking hole 10 Strut 11 Hook-like part 12 Step 13 Through hole

Claims (3)

[Claims] 1. A magnetic relay combined with a thermal relay,
In a magnetic switch in which a hooking portion and a slider formed on the back surface of an electromagnetic contactor frame are mounted and fixed to two rails provided by molding on the mounting surface, the mounting surface is adjacent to the rail. An electromagnetic switch characterized in that a pillar having a hook-like tip is planted, and the hook-shaped portion is engaged with a hooking hole provided in a slider. 2. An electromagnetic switch according to claim 1, wherein a step is provided inside the hooking hole, and a hook-shaped portion at the tip of the support is engaged with the inner step. 3. The electromagnetic switch according to claim 1 or 2, wherein a pullback through hole is provided adjacent to the hook hole.