JPH0511708U - Switch gear pull-out carriage position detection device - Google Patents

Abstract

(57) [Abstract] [Purpose] To facilitate the adjustment work of the mounting position of the detection switch in the pullout cart position detection device for the switchgear and to ensure the detection operation. [Structure] A magnet 5 is attached to the trolley 1 side, and a magnetic proximity switch 6 is provided at a fixed side position corresponding to the magnet 5.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting a position of a switch gear pulling trolley, and more particularly, to a structure of a detecting portion between a trolley and a fixed portion.

[0002]

[Prior Art]

 The main parts of the switchgear circuit breaker, transformer, etc. are housed in a drawer cart, and when the cart is pulled out, it is separated and opened from the power supply and distribution line.

Conventionally, in order to detect the position of the pulling carriage, a position detecting device as shown in FIGS. 3 and 4 is provided. FIG. 3 is a front view of the position detecting device, and FIG. 4 is a side view of a fixed side portion thereof.

As shown in these drawings, conventionally, a micro switch 22 is fixedly provided on one side of a moving path of a truck 21, and an operating piece 23 is provided on a side of the truck 21 corresponding to the micro switch 22. Is attached. The micro switch 22 is fixed to a desired position on the floor surface 25 via a mounting plate 24, and is turned on / off when the operating piece 23 comes into contact with or separates from the contact portion 22a. Then, the position of the carriage 21 is detected from the on / off operation of the micro switch 22.

[0005]

[Problems to be solved by the device]

 In the above-mentioned conventional position detecting device, when the carriage 21 is at a predetermined front-back position, the operating piece 23 contacts the contact portion 22a of the microswitch 22 toward the fixed side with respect to the moving path of the operating piece 23. It is necessary to accurately position the micro switch 22. However, the positioning requires a slight adjustment in the front and back and in the up and down, which makes the work difficult. Further, if this adjustment is inaccurate, the micro switch 22 may malfunction or may not operate at all.

Further, vibration of the dolly 21 and rattling of the dolly 21 are directly transmitted to the micro switch 22 via the operating piece 23, which may cause the micro switch 22 to malfunction.

The present invention addresses such a conventional problem, and an object thereof is to facilitate the work of mounting and adjusting the detection switch and to eliminate the malfunction of the switch to ensure the detection operation. .

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a switchgear pull-out carriage position detecting device in which a magnet is attached to the carriage side and a magnetic proximity switch is provided at a fixed side position corresponding to the magnet. It has a structure.

[0009]

[Action]

 In the above structure, the magnet moves in the vicinity of the magnetic proximity switch along with the movement of the cart, and when the magnet enters the detection range, the magnetic proximity switch is turned on. Therefore, the magnetic proximity switch may be positioned so that the magnet passes through the detection range.

[0010]

【Example】

 Hereinafter, details of the present invention will be described based on an embodiment shown in FIGS. FIG. 1 is a front view of an apparatus for detecting the position of a pulling cart of a switchgear according to an embodiment of the present invention, and FIG. 2 is a side view of a fixed side portion thereof.

In these figures, 1 is a switch gear pull-out carriage, 2 is its wheel, 3 is a support frame for the wheel 2, and 4 is a floor surface for moving the carriage 1. The apparatus of this embodiment includes a magnet 5 on the trolley 1 side and a magnetic proximity switch 6 on the fixed side.

The magnet 5 is attached to the support frame 3 on one side of the carriage 1 via a holding member 7 in a protruding manner. On the other hand, a plurality of magnetic proximity switches 6 (only two of which are shown in FIG. 2) are attached to an insulating plate 9 erected on the floor 4 via angle-shaped attachment members 8. The insulating plate 9 stands at a position facing the movement path of the magnet 5 and stands parallel to the movement path. Therefore, the plurality of magnetic proximity switches 6 and 6 are arranged in parallel along the movement path of the magnet 5. ing. Further, there is a window hole 9a in the center of the insulating plate 9, and the main body of the magnetic proximity switch 6 is located in this window hole 9a. Reference numeral 10 is a connecting conductor to the magnetic proximity switch 6.

In the above configuration, when the carriage 1 moves back and forth, the magnet 5 moves along the inner side surface of the insulating plate 9 along with the movement, and crosses the vicinity of the magnetic proximity switch 6. Needless to say, the magnetic proximity switch 6 has a detection range of a predetermined spread, and when the magnet 5 enters the detection range, it is turned on, and when the magnet 5 goes out of the detection range, it is turned off. . The position of the carriage 1 is detected by the on / off operation of each magnetic proximity switch 6.

As described above, since the magnet 5 may be placed within the detection range of the magnetic proximity switch 6, even if the mounting position of the magnetic proximity switch 6 is slightly displaced in the front-rear direction or the up-down direction, the displacement amount thereof is Is within the detection range, the magnetic proximity switch 6 is reliably turned on and off. Therefore, it is not necessary to make a very small adjustment to the positioning of the magnetic proximity switch 6.

[0015]

[Effect of the device]

 As described above, according to the present invention, even if there is a slight deviation in the positioning of the detection switch on the fixed side, it is possible to reliably detect the position of the trolley. Since there is plenty of space, it is not necessary to make a minute adjustment, and mounting and adjustment work on the fixed side of the switch can be done easily.

Further, since the member on the trolley side and the switch on the fixed side are not in contact with each other, rattling such as vibration of the trolley does not add to the switch. The operation becomes reliable.

[Brief description of drawings]

FIG. 1 is a front view of a switch gear pull-out carriage position detecting device according to an embodiment of the present invention.

FIG. 2 is a side view of a fixed side portion of the above embodiment.

FIG. 3 is a front view of a conventional device.

FIG. 4 is a side view of a fixed side portion of the conventional example.

[Explanation of symbols]

 1 bogie 2 wheels 4 floor 5 magnet 6 magnetic proximity switch 9 insulating plate

Claims (1)

[Claims for utility model registration] 1. A magnet (5) is attached to the truck (1) side, and a magnetic proximity switch (6) is provided at a fixed side position corresponding to the magnet (5). A switchgear pull-out carriage position detecting device characterized by the following.