JPH0127248Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for attaching an accessory device formed independently from the main body of an electromagnetic contactor to the main body.

Magnetic contactors require auxiliary devices such as auxiliary contacts in addition to the main contactor in order to indicate that the contactor has operated and to automate the equipment in which the magnetic contactor is installed. If the application is changed, this accessory device is manufactured as a single unit independent of the main body, and if necessary, this unit is attached to the main body case so that it can operate together with the main body.

[Conventional technology]

A conventional device of this kind is shown in FIG. In FIG. 1, a side wall 1a of a main body case 1 that houses the electromagnetic contactor main body is provided with a window 1b for connecting the movable contact support of the main body and the movable contact support of the auxiliary contact unit 4, and is spaced apart. 2 mounting holes 1c
is provided. The auxiliary contact unit 4 includes
The side wall 4a is provided with a vertically elongated window 4b and a hook-shaped protrusion 5 made of two elastic bodies facing away from each other at a distance from each other. A connecting protrusion 6 that fits into 2 protrudes. To attach the auxiliary contact unit 4 to the main body case 1, insert the connecting protrusion 6 of the auxiliary contact unit 4 through the window 1b of the main body case 1 into the hole 2 on the side of the movable contact support of the main body. Connect the movable contact support and the connecting protrusion 6 of the auxiliary contact unit 4, and insert the hook-like protrusion 5 into the mounting hole 1c in the direction of the arrow P using its elasticity, and engage the hook with the periphery of the hole 1c. let Then, the electromagnetic contactor main body and the auxiliary contact unit 4 are completely connected, and the movable contact support of the auxiliary contact unit 4 operates simultaneously with the movable contact support of the main body.
Open and close its contactor contacts.

[The problem that the idea aims to solve]

By the way, since the auxiliary contact unit is attached to the main body case only by the engagement between the hook-like protrusion 5 and the mounting hole 1c, the auxiliary contact unit may shift or rotate to the left or right to some extent with respect to the main body case. . Furthermore, since the hook-like protrusion 5 has elasticity, there is a drawback that this elasticity adversely affects the vibration of the auxiliary contact unit 4 and amplifies it.
Furthermore, the auxiliary contact unit can be attached to the main body case with one touch, but if it becomes necessary to replace the auxiliary contact unit due to a malfunction of the auxiliary contact unit, the auxiliary contact unit cannot be removed. However, it has the disadvantage that the electromagnetic contactor body must also be replaced.

Therefore, the purpose of the present invention is to eliminate the above-mentioned drawbacks and to provide a structure for attaching an accessory device to an electromagnetic contactor that has a simple structure, can be installed accurately with one touch without any rattling, and can also be removed. be.

[Means to solve problems]

In order to achieve the above-mentioned object, the present invention provides a mounting structure in which an accessory device is attached in a snap manner to the side wall of an electromagnetic contactor having a case that can be divided into upper and lower parts. A pair of rectangular notches are provided on the mating surfaces of the accessory device, and hook-shaped hooks are provided on the side walls of the accessory device at positions corresponding to the notches, respectively, and are snap-fitted to the notches to prevent the accessory device from coming off. A fitting piece that fits into the notch is provided to restrict vertical movement of the protrusion and the attached device, and a fitting piece that fits into the notch is provided on the side wall of the upper case of the electromagnetic contactor at a position separated from the mating surface. The apparatus is characterized in that a recess is provided that is elongated in the direction, and a protrusion that fits into the recess is provided on the side wall of the accessory device at a position corresponding to the recess.

[Effect]

In the present invention, a pair of rectangular notches are provided in the side wall of the upper case of the electromagnetic contactor, and the pair of rectangular notches are provided in the side wall of the upper case, and the hook-shaped protrusions are snap-coupled to the notches in the side wall of the accessory device. A fitting piece that fits into the notch is provided, and a recess formed in the side wall of the upper case of the electromagnetic contactor is formed long in the vertical direction at a position separated from the mating surface, and the recess is formed in the side wall of the accessory device. By providing a protrusion that fits into the recess at a position corresponding to the position, the attached device can be easily attached to the electromagnetic contactor with a single touch, and the fitting piece fits into the notch. This prevents the attached device from moving in the vertical direction, and the protrusion that fits into the recess prevents the attached device from rotating.The attached device can also be removed by using the upper case and lower case, which are divided into upper and lower halves of the magnetic contactor. The accessory device can be removed by disconnecting the upper case from the lower case.

〔Example〕

Next, one embodiment of the present invention will be described in detail based on the drawings.

In Fig. 2A and B, 1 and 1' are the main body cases of the electromagnetic contactor which are divided into upper and lower halves, and the lower case 1' shown in Fig. 1B has fixed iron core 10, electromagnetic coil 11, etc. When the parts are stored, Figure 2A
The upper case 1 shown in FIG. Mainly movable parts such as contacts are housed there. Further, on the side wall of the upper case 1, there is a window 1b for connecting the movable contact support of the main body and the movable contact support of the auxiliary contact unit 4, which is an accessory device attached to the main body, and a window 1b on the periphery 1d of the window 1b for connecting the movable contact support of the main body to the movable contact support of the auxiliary contact unit 4, which is an accessory device attached to the main body. In addition to a pair of mounting notches 1f, two oval recesses or holes 1e are provided in the figure for positioning the auxiliary contact unit 4 at positions separated from the periphery 1d. It is being 3 is an external connection terminal of the main contactor. Furthermore, the upper and lower cases 1 and 1' each have a coupling protrusion 12 for both cases,
12' is provided, and a coupling screw 13 is fitted into the projection 12. Upper case 1 and lower case 1'
In order to connect the upper and lower case peripheries 1d and 1d' to each other, the connecting projections 12 and 12' of the upper and lower cases 1 and 1' will face each other, so the connecting screw 1
Just tighten it with 3. At this time, lower case 1'
The fixed core 10 housed in the upper case 1 and the movable core housed in the upper case 1 face each other to form an electromagnet, and the notch 1f of the upper case 1 serves as an auxiliary contact as in the case shown in FIG. This becomes the mounting hole 1c for the unit 4.

As shown in FIG. 2C, the auxiliary contactor unit 4 has a connecting protrusion 6 protruding from a rectangular window 4b in its side wall 4a for connecting with the movable contactor support of the electromagnetic contactor main body, and has both upper and lower cases 1, 1', a pair of elastic hook-like protrusions 5 facing away from each other are provided corresponding to the notch 1f so as to snap into the notch 1f of the main body case 1. Also, a circular protrusion 7 and a notch 1f that fit into the oblong recess (or hole) 1e of the upper case 1
A fitting piece 8 that fits together with the hook-like protrusion 5 is provided. As shown in FIGS. 3A and 3B, the fitting piece 8 is a plate-shaped projection and is provided on the side surface of the hook-like projection 5 at right angles to the surface of the hook-like projection 5.

In order to install this auxiliary contactor unit 4 to the electromagnetic contactor main body, the positioning recess 1 of the upper case 1 must be
When the auxiliary contactor unit 4 is pressed against the side wall 1a of the upper case 1, the hook-like projection 5 of the auxiliary contactor unit 4 has elasticity. Because of this, the notch 1f is bent in the upper case 1 along with the fitting piece 8.
and engages with the inner periphery of the notch 1f. At this time, since the auxiliary contactor unit is positioned relative to the electromagnetic contactor main body, the position of the movable contact support of the main body and the connection protrusion 6 of the auxiliary contact unit is such that the connection protrusion 6 is aligned with the hole 2 on the side of the contact support. You start to get stuck into it. In this way, the electromagnetic contactor body and the auxiliary contactor unit 4 are integrated, and the auxiliary contactor unit operates together following the operation of the main body.
Furthermore, since the fitting piece 8 is inserted into the notch 1f of the upper case 1 together with the hook-like projection 5, the auxiliary contact unit 4 does not move in the vertical direction. Also, since the circular protrusion 7 of the auxiliary contact unit 4 fits into the recess 1e of the upper case 1,
The auxiliary contact unit does not move from side to side. Therefore, the auxiliary contactor unit 4 can be accurately attached to the electromagnetic contactor body with one touch without any play.

Note that the oval recess 1e for positioning provided in the side wall 1a of the upper case 1 and the circular protrusion 7 provided in the side wall 4a of the auxiliary contact unit 4 that fits into this recess 1e are as described above. The recess 1e may be provided on the auxiliary contact unit 4 side and the circular protrusion 7 may be provided on the main body case side as long as they fit in the same state.

To remove the auxiliary contact unit 4 in order to replace it, loosen the screws 13 that connect the upper and lower cases 1 and 1' of the main body, and after separating the upper and lower cases 1 and 1' into upper and lower parts, remove the auxiliary contact unit 4. Pull out the hook-like protrusion 5 of the contactor unit 4 downward from the notch 1f of the upper case 1. At this time, the circular protrusion 7 for positioning provided on the auxiliary contact unit 4 slides in the vertically long recess 1e provided in the side wall 1a of the upper case 1, and the auxiliary contact unit 4 is easily pulled out from the upper case 1. It can be removed.

[Effect of idea]

As described above, the attachment device for the accessory device of the electromagnetic contactor according to the present invention includes, in addition to the notch with one end open provided in the upper case of the electromagnetic contactor and the hook-like protrusion provided in the accessory device. A fitting piece is provided on the side of the hook-like projection as a positioning device to prevent vertical displacement, and an oval shaped piece that is elongated in the vertical direction is provided on one side wall where the electromagnetic contactor and the attached device are connected to each other. By providing a recess (or hole) and providing a protrusion on the other side wall that fits into the recess (or hole), displacement in the rotational direction is prevented. Therefore, the attached device is restricted from shifting and rotating vertically and horizontally relative to the electromagnetic contactor.
Can be installed accurately without any play. In addition, when removing the attached device, the case of the magnetic contactor should be placed vertically.
Utilizing the fact that it is divided, it has the advantage that the accessory device can be easily removed by removing the upper case from the lower case.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional structure for attaching an auxiliary contact unit as an accessory to a magnetic contactor, and Figures 2 A, B, and C are examples of an implementation of the present invention for attaching an auxiliary contact unit to a magnetic contactor. For example, A
1 is a perspective view of the main body upper case, B is a perspective view of the main body lower case, and C is a perspective view of an auxiliary contactor unit. Third
Figures A and B show partially enlarged views of the engaging protrusion and fitting piece in Figure 2C, with A being a front view and B being a side view. 1, 1': Both upper and lower cases of magnetic contactor, 1a:
Upper case side wall, 1c: Auxiliary contact unit mounting hole, 1e: Positioning recess, 1f: Upper case side wall notch, 4: Auxiliary contact unit, 4a:
Side wall of auxiliary contact unit, 5: hook-shaped projection,
7: Circular protrusion, 8: Fitting piece.

Claims (1)

[Scope of utility model registration request] In a mounting structure in which an accessory device is attached in a snap manner to the side wall of an electromagnetic contactor having a case that can be divided into upper and lower parts, the side wall of the upper case of the electromagnetic contactor has a pair of rectangular holes that open at the mating surface with the lower case. A notch is provided on the side wall of the accessory device, and hook-like protrusions are provided on the side wall of the accessory device at positions corresponding to the notches to prevent the accessory device from coming off and are snap-fitted to the notches, and to restrict vertical movement of the accessory device. A fitting piece that fits into the notch is provided, and a recess is provided in the side wall of the upper case of the electromagnetic contactor at a position separated from the mating surface and is elongated in the vertical direction. An attachment structure for an electromagnetic contactor, characterized in that a side wall of the attachment device is provided with a protrusion that fits into the recess at a position corresponding to the recess.