JPH065153A - Limit switch - Google Patents

Abstract

PURPOSE:To facilitate the mounting operability of a built-in switch installed in a case main body and an earth terminal by mounting the built-in switch which is switch-operated by receiving external force on the inside of the case main body, in a specific manner. CONSTITUTION:A limit switch 11 comprises two plungers 12, 12 for sensing outer force, an inner restoring mechanism 13 for restoring the plungers 12, 12 to a standby position, built-in switches 14, 14 to be switch-operated interlocking with the movement of the plungers 12, 12, a mounting plate 16 loaded with the built-in switches 14, 14 and an earth terminal, a case main body 17 for storing and supporting these, and a lid body 17a of the case main body. When the built-in switches 14, 14 are to be mounted on a storage recessed part 18 of the case main body 17, they are mounted on the case main body 17 so that the built-in switches 14, 14 and the earth terminal are mounted on one mounting plate 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a limit switch used as, for example, a detection switch for various kinds of equipment, and more particularly to a limit switch having improved assembly performance of switch parts incorporated in a case body.

[0002]

2. Description of the Related Art Generally, this kind of limit switch is
An operating plunger mounted on the case body receives an external force to move back and forth to open and close an internal built-in switch to perform switching operation (for example, Japanese Utility Model Publication No. 50-5661 and Japanese Utility Model Publication No. 50-6562). (See the official gazette).

When assembling this limit switch, a built-in switch and a ground terminal are directly attached through screws to the screw holes formed at the internal mounting position of the case body.

However, when the built-in switch and the ground terminal are mounted, the assembly work efficiency is poor because it is difficult for the tip of the driver to correspond to the inner screwed part due to the positional restrictions of the inner wall surface of the case and the switch parts. , The case body made of aluminum die casting is troublesome and troublesome to machine a large screw hole at a fixed position inside the case,
This has been a cause of lowering workability.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a limit switch which simplifies the mounting operability of the built-in switch and the ground terminal mounted on the case body.

[0006]

SUMMARY OF THE INVENTION The present invention is a limit switch having a built-in switch for receiving an external force and performing a switching operation, and a mounting member for mounting the built-in switch. It is characterized in that the built-in switch is attached to the case body via the attachment member.

Further, a limit switch having a built-in switch for performing a switching operation by receiving an external force is provided inside the case body, and a mounting member having a mounting portion for the built-in switch and a mounting portion for a ground terminal is provided. The built-in switch and the ground terminal are attached to the case body via the attachment member.

[0008]

According to the present invention, when the built-in switch is mounted on the case body, the mounting member is previously mounted at the switch mounting position of the case body, and the built-in switch is mounted on the mounting member and mounted on the case body.

When both the built-in switch and the ground terminal are mounted on the case body, the ground terminal is mounted on the mounting member in advance, the mounting member is mounted on the case body with the ground terminal mounted, and then the mounting member is mounted. Mount the built-in switch on the top and attach the built-in switch to the case body together with the ground terminal.

[0010]

As described above, since the mounting member dedicated to the built-in switch is attached to the case body in advance, and the built-in switch is mounted on the mounting member to be mounted, the inner wall surface of the case and the switch parts are mounted inside the case body. The built-in switch can be easily installed without being restricted by the
In addition, it is not necessary to machine large screw holes in the case body, which improves work efficiency when manufacturing the case body.

Further, in addition to the built-in switch, the ground terminal can be mounted on the mounting member in the same manner. Especially, in the case of the ground terminal, the ground terminal can be mounted on the case body in an integrated state in which it is mounted on the mounting member in advance. The terminals can be easily assembled. As a result, the burden on the operator is reduced, skill is not required, and the assembly work efficiency and the assembly time can be shortened.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The drawing shows a dual limit switch,
In FIG. 3, the limit switch 11 includes two sets of plungers 12 and 12 that sense an external force, an internal return mechanism 13 that returns the plungers 12 and 12 to the standby position, and movements of the plungers 12 and 12. Both built-in switches 14 and 14 that perform switching operations in conjunction with, a mounting plate 16 on which both built-in switches 14 and 14 and a ground terminal 15 are mounted, a case body 17 that accommodates and supports these, and a lid 17a thereof. To be done.

The two plungers 12, 12 described above have their outer ends projecting outward from the case body 17 by a certain amount, and allow their inner ends to move forward and backward with the built-in switches 14, 14. The standby operation is performed, and the outer ends of the plungers 12, 12 receive the external force and are retracted into the case body 17 to perform the switching operation.

By the way, when the both built-in switches 14 and 14 are mounted in the housing recess 18 of the case body 17, the built-in switches 14 and 14 and the ground terminal 15 are mounted on one mounting plate 16 as shown in FIG. It is provided so as to be mounted and attached to the case body 17.

The mounting plate 16 has a rectangular plate shape having a size corresponding to the accommodating recess 18 of the case body 17, and has screw holes 19 for mounting the built-in switch formed at four corners thereof, and screws 20 are provided therein. By screwing on the both built-in switches 14 and 14, the built-in switch 1 is mounted on the mounting plate 16.
Mount and mount 4,14.

Further, adjusting springs 21 and 21 for adjusting switch sensitivity are interposed on one side corresponding to the built-in switches 14 and 14 to fix the screws 20 and 20, and the tightening force of the screws 20 is adjusted to adjust the built-in switch 14. Adjust the sensitivity of. Further, a burring portion 22 for locating the adjustment spring is provided on the side of the screw hole 19 corresponding to the spring. By providing the burring portion 22, the adjustment spring 21 can be easily assembled at a fixed position during assembly. This improves the handleability and assembly of the spring.

Further, in the center of the mounting plate 16, holes 23, 23 for insertion of the double plungers 12, 12 and mounting plate mounting holes 24 ... Are opened, and the mounting plate mounting holes 24. By providing the mounting plate 16 at the center of the mounting plate 16, the mounting plate 16 can be easily mounted without being restricted by the position of the inner wall surface of the case when the screw-fastening screw operation using the driver is performed.
Further, the mounting plate mounting holes 24 ... Are made small for inserting the small screws 25, and the mounting plate mounting screw holes 26 ... Corresponding to the mounting plate mounting screw holes 26 formed in the storage recess 18 of the case body 17 are set small for the small screws. In addition, it is easy to form a screw hole in the aluminum die-cast case body 17.

Further, an inverted L-shaped arm 27 is provided so as to stand upright on one side edge of the central portion of the mounting plate 16, and the inverted L-shaped arm 2 is provided.
A screw hole 28 for attaching a ground terminal is formed at the upper end of 7, and at the time of assembly, a screw as the ground terminal 15 is preliminarily screwed into the screw hole 28, together with the mounting plate 16 and the case main body 17.
Install on.

The limit switch 1 thus constructed
When assembling No. 1, the mounting plate 16 is previously prepared before this assembling.
Attach the ground terminal 15 to. With the ground terminal 15 attached, the mounting plate 16 is inserted into the housing recess 1 of the case body 17.
8, and mounting screws 16 are attached to the mounting plate mounting holes 24 of the mounting plate 16 by screwing small screws 25 into the mounting plate mounting screw holes 26 of the case body 17.

With the mounting plate 16 attached, two built-in switches 14, 14 are mounted on the mounting plate 16 with screws 20 ...
It is screwed and fixed with and attached to the case body 17. After that, the entire recess of the storage recess 18 of the case body 17 is covered with the lid 17a, and the assembly of the limit switch 11 is completed.

As described above, the mounting plate dedicated to the built-in switch is attached to the case body in advance, and the built-in switch is mounted and mounted on the mounting plate. The built-in switch can be easily installed without being restricted by the position, and it is not necessary to machine large screw holes in the case body, improving work efficiency when manufacturing the case body.

In addition to the built-in switch, the ground terminal can be attached to the mounting plate in the same manner. Especially, in the case of the ground terminal, the ground terminal can be attached to the case body in an integrated state beforehand. The terminals can be easily assembled. As a result, the burden on the operator is reduced, skill is not required, and the assembly work efficiency and the assembly time can be shortened.

In the correspondence between the present invention and the configuration of the above-described one embodiment, the mounting member of the present invention corresponds to the mounting plate 16, but the present invention is limited to the configuration of the above-mentioned one embodiment. is not. For example, although two limit switches are shown in the embodiment, it is also applicable to a plurality of limit switches such as four limit switches.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a limit switch according to the present invention.

FIG. 2 is a vertical sectional side view of the limit switch of the present invention.

FIG. 3 is a bottom view showing a partial cross section of the limit switch of the present invention.

FIG. 4 is an exploded perspective view of a main part of a limit switch according to the present invention.

[Explanation of symbols]

 11 ... Limit switch 14 ... Built-in switch 15 ... Ground terminal 16 ... Mounting plate 17 ... Case body

Claims (2)

[Claims] 1. A limit switch in which a built-in switch for receiving an external force and performing a switching operation is mounted inside a case body, and a mounting member for allowing the built-in switch to be mounted is provided, and the built-in switch is mounted through the mounting member. Limit switch attached to the case body. 2. A limit switch in which a built-in switch for performing a switching operation by receiving an external force is mounted inside the case body, and a mounting member having a mounting portion for the built-in switch and a mounting portion for a ground terminal is provided. , A limit switch in which the built-in switch and the ground terminal are attached to the case body via this attachment member.