JPH038223A - Operation display apparatus of electromagnetic contactor - Google Patents

Abstract

PURPOSE:To have function to check sequence and operational condition display of an electromagnetic contactor and at the same time to retain safety for an operator by installing an open part cover which is transparent and freely opened and closed or attached and detached and a display means to recognize displacement position of a pushing part through the open part cover. CONSTITUTION:An open part 2a for an outer cover to push a movable insulating stand is covered with a cover 4 which is transparent and can be opened and closed or attached and detached if necessary. As a display means, a prism or a lens is formed in the cover 4, and indicators are installed in a movable side or a fixed side or both of them and displacement position information corresponding to the movement of the movable part can be observed using the refracted light of the prism or the lens. With this structure, functions for sequence check and operational condition display of an electromagnetic contactor are provided and an error operation of a pushing part during driving the apparatus is prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electromagnetic contactor and a switch device that can be operated by electric power and manually operated. The present invention relates to a device for preventing misidentification of a display unit.

[Conventional technology]

In the conventional technology, checking whether the circuit through the contacts of a magnetic contactor is configured correctly (hereinafter referred to as a sequence check) is carried out using a fixed insulating stand or MA edge cover (hereinafter referred to as an external circuit) without driving the electromagnet of the magnetic contactor. (called a cover)
is configured to open and press a part of a movable insulating stand to which a movable contact is attached from the opening, and on the other hand,
In order to visually check the operating status of the electromagnetic contactor, a part of the movable insulating stand or an operation display unit linked to the movable insulating stand is inserted through the opening and its movement can be visually observed.

Correctly connect the multiple contacts attached to the movable insulating stand,
In order to satisfy the sequence check function, the pressing part is arranged approximately at the center of the movable insulating table so that the movable part can move in translation, and this part also serves as the function of displaying the above-mentioned operation. FIGS. 24 and 25 show conventional examples of electromagnetic contactors configured in this way, in which 11 is a fixed insulating stand;
2 is an insulating stand cover, 12a is its opening, and 13 is a movable l!
The edge stand 13a is its pressing part.

Note that examples of techniques for optically displaying the operating state are disclosed in Japanese Patent Application Laid-open No. 141138/1982 and Japanese Utility Model Publication No. 15232/1983.

[Problem to be solved by the invention]

The conventional technology configured in this manner has the following problems.

a. Even after the sequence check, the pressing part 1 of the movable insulating table 13
3a remains exposed and can be pressed at any time, and there is a risk of an accident if the pressing part 13a is pressed by mistake when the equipment constituted by an electric circuit equipped with an electromagnetic contactor is in an operable state.

b. Since a part of the outer cover is opened so that a part of the movable insulating table 13 can be suppressed, the pressure generated by the arc when the current is interrupted is released through the opening 12a, and the pressure inside the arc extinguishing chamber does not increase. Breaking performance deteriorates. For this reason, it became necessary to strengthen the arc extinguishing ability, which was an impediment to improving economic efficiency, downsizing, and improving performance.

The guide that regulates the movement of the C1 movable insulating table 13 is the opening 1
2a, the area around the opening 12a becomes dirty with abrasion powder from repeated operations, and the abrasion powder adheres to the nameplate on the outer cover on the same surface as the opening 12a, making it difficult to read the written information. Something happened.

On the other hand, the opening 12a serves as an entrance for foreign matter, causing problems such as poor contact of the contacts and inhibiting the movement of the movable parts.

d. Since the operating state is recognized by the difference in the position of the movable part on the front side or the back side of the opening 12a, identification from the side is relatively good, but the control panel The equipment is equipped with electromagnetic contactors and other equipment of different sizes, and while it is possible to check the operating status from the side, it is difficult to distinguish from the front. There wasn't.

e. The technique disclosed in Japanese Patent Application Laid-Open No. 59-141138 has a display window 14 using a reflective prism 17, as shown in FIG. 26, but the display window 14 cannot be opened or closed. In order to selectively block unexpected information, it is necessary to take measures such as vapor-depositing aluminum to prevent light from passing through the conical reflective surface, which is also problematic from an economic perspective. In the figure, 15 and 16 are labels. The content disclosed in Japanese Utility Model Publication No. 52-15232 also discloses a similar display technique using reflected light.

In view of the above problems, the present invention focuses on adding safety to ease of handling, and furthermore, eliminates dirt caused by abrasion powder near the opening of the outer jacket, prevents the intrusion of foreign substances, improves the blocking performance, and It is an object of the present invention to provide a new operation display device for an electromagnetic contactor to prevent misidentification of the operation state.

[Means to solve the problem]

Means for achieving the above object are presented in the claims. Items 1 to 3 are for opening and closing the opening of the outer sheath to press the movable HA edge stand as necessary.

Alternatively, it is covered with a removable light-transmitting cover, and a prism or lens is formed on the cover as a display means, and a sign is installed on the movable part side or the fixed image, or both, so as to correspond to the movement of the movable part. A configuration is shown in which displacement position information can be visually observed using refracted light from the prism or lens. Items 5 and 6 are whether to install a guide on which the movable part slides deep inside the opening and block the guide on the opening side in order to prevent abrasion powder from adhering near the opening.
Alternatively, a guide is provided at a position separated from the opening by an insulating wall. Item 4 forms an inclined surface toward the side wall of the opening on the pressing part of the movable insulating table, and uses the inclined surface as a concave mirror surface to detect changes in position corresponding to the movement of the movable part using reflected light from the concave mirror. It is made visible through a transparent cover. Item 8 aims to expand the display field of view in response to the constituent requirements of Item 2. Item 7 is an integral extension of the light-transmitting cover from the viewpoint of preventing electric shock.

[Effect]

The configuration shown in item 1 enables a sequence check by opening or removing the opening cover, and by closing it after the sequence check, it is possible to prevent the pressing part from being exposed. In addition to eliminating the risk of accidentally operating the parts, the covering of the openings prevents pressure drop and foreign matter from entering the arc extinguishing chamber when the current is cut off. Brings good results in improving interrupting performance.

In addition, with the configurations of Items 1 to 3 and Item 8, the positional displacement of the movable insulating table when the electromagnetic contactor is in an energized state or when the current is cut off can be clearly detected from a wide angle of view using refracted light. Can be visually recognized.

Furthermore, with the configurations of Items 5 and 6, abrasion powder due to sliding does not adhere to the vicinity of the opening, and the operating state of the movable part can be visually observed through the cover of the light transmitting body.

The configuration described in item 4 makes it possible to reduce the product height by enlarging a small sign through a translucent cover using reflected light from a concave mirror, and to display an operation display that is visible from a wide angle.

The configuration described in item 7 is effective in preventing electric shock by also serving as a covering for the terminal portion.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.

FIG. 1 is a front view of an embodiment of an operation display device for an electromagnetic contactor according to the present invention, and FIG. 2 is a partial cross-sectional view of the same side. There is an opening 2a facing 3a, and an opening cover 4 is provided to cover the opening 2a so as to be openable and closable. Further, a marking body 5 is provided at the tip of the pressing portion 3a. FIG. 2 shows a state in which the opening cover 4 is opened, and FIG. 4 is an exploded perspective view of an embodiment of the electromagnetic contactor according to the present invention in a non-excited state.

As shown in the figure, the movable insulating stand 3 has a groove 3a for mounting the sign 5, and a first protrusion 5a is provided which is press-fitted into the groove 3a and latched at a predetermined central position. The marking fi5b is set on the conical inner surface of the marking body 5.

The insulating stand cover 2 is fitted with a sign 6 and is provided with a stepped portion 2b that engages with a latching protrusion 6a provided on the sign 6. In addition, the #@edge stand cover 2 has an engaging portion 4c of the opening cover 4.
The stepped portion 2c that engages with the elastic piece 4b, the stepped portion 2e that hooks the shield portion 4e of the elastic piece 4b, and the opening cover 4 rotate as shown in FIGS. 3(a) and 3(b) with the engaging portion 4c as a fulcrum. In order to prevent the opening cover 4 from falling off from the engaging portion 2c when the opening cover 4 is moved, a protrusion 2d that engages with a falling-off prevention piece 4d provided on the cover 4 is provided. The opening cover 4 is made of light-transmitting transparent plastic, and includes a conical portion 4f and an operation display surface 4.
Except for a.

It has a matte finish to diffuse the light. Attach the opening cover 4 to the insulating base cover 2 by following arrow A in FIG. 3(a).
When the opening cover 4 is opened in the direction of the arrow B shown in FIG. 3(b), the fall prevention piece 4d of the cover is designed to engage with the protrusion 2d during the same movement process. , the opening cover cannot be removed in any direction other than in the direction opposite to the direction of the arrow shown in FIG.

FIG. 5 shows an embodiment of a guide for moving the movable insulating table 3 smoothly in a straight line and for preventing the scattering of abrasion powder. Fifth
As shown in the figure, the sliding movement between the movable spa table 3 and the fixed insulating table 1 is caused by the insulating wall 1b of the fixed insulating table 1 communicating with the opening 2a.
A U-shaped path is formed separated by a U-shaped path, and a sliding portion S where the anti-center side of the U-shaped path and the insulating wall 1b face each other is formed into an ellipse, and this sliding portion S is placed in the inner part away from the opening 2a. By arranging the opening 2a, consideration is given to preventing abrasion powder caused by sliding from being scattered outside from the opening 2a.

The display mechanism of the operation display section when the electromagnetic contactor is in a non-excited state will be explained with reference to FIG. The first mark m5b attached to the inner surface of the indicator 5 is located inside the second mark m6b set on the inner surface of the indicator 6 and is located within the conical protrusion 4f of the opening cover 4.
It is set to 100 to cover. In this state, the light shown by the solid line in FIG. 8 is reflected by the marker 5b and returns in the direction of the arrow shown by the broken line in the same figure. At this time, if 8m5b is colored green, the non-excited state can be confirmed as green.

On the other hand, when the electromagnetic contactor is excited, as shown in FIG. 9, the indicator 5 moves away from the conical projection 4f of the opening cover 4, and the incident light beam shown by the arrow in FIG.
It is reflected by L16b and returns. At this time, if the second mark rIi6b is colored red, the excitation state can be confirmed as red.

According to this embodiment, the opening cover 4 opens using the insulating base cover 2 as a fulcrum and has a structure to prevent it from falling off, so it will not be lost during a sequence check, and once the sequence check is completed, it can be operated with a single touch. Opening cover 4
can be closed.

FIG. 11 is a diagram showing another embodiment that takes economic efficiency into consideration.
*The claw body 5 is molded integrally with the movable insulating stand 3, and green tape is attached to the IWi 5 or it is colored green. FIG. 12 is a diagram showing an embodiment in which the economical efficiency of the layer is further taken into account, in which a protrusion having an isosceles triangular cross section is formed on the opening cover 4, and the movable insulating table 3 is molded with a The structure of the mold is simplified to facilitate attachment of the tape-shaped first mark 5b and second mark 6b. The enclosure described in claim 2 refers to the sign 5 in each of the above embodiments.

13 to 16 are views of other embodiments of the opening cover 4. FIG. The embodiment shown in FIGS. 13(a), (b), and (c) has an engaging portion 4 that engages with the M edge cover 2 and serves as a fulcrum for rotation.
c. The mold structure for forming the latching step 4e of the latching elastic piece 4b is simplified, and the falling-off prevention piece 4d is also used as the outer frame of the opening cover 4; Figure 15 (
a), (b) and FIG. 16 show examples in which a tool is used to open the opening cover 4 to prevent it from being opened inadvertently, and safety is more important than ease of handling. It is something.

Next, FIGS. 17 to 22 show other embodiments in which the operation is displayed optically.

In FIG. 17, the pressing part 3a of the movable insulating stand 3 is inclined toward the opening side of the fixed insulating stand 1 and the insulating stand cover 2, the inclined surface is made into a concave surface, and a mirror surface is formed by aluminum vapor deposition or aluminum foil pasting. The first sign 5b and the second sign 6b are fitted to the opening cover 4 and fixed to the fixed insulating stand 1, and are held and fixed by the insulating stand cover 2. When the electromagnetic contactor is in a non-excited state, 5b is reflected by the mirror surface, and in the excited state,
The light is reflected by the second target mGb surface so that the operating state can be visually observed through the opening cover 4. By forming the mirror surface into a concave surface, the sign can be seen in an enlarged view (
Since the enlargement ratio Q' can be increased, compared to a simple plane,
By reducing the size of the sign itself, it is possible to reduce the product height and widen the viewing angle.

In FIG. 19, a chevron-shaped protrusion 4f' having a triangular cross section is provided on the outside of the opening cover 4, the pressing part 3a of the movable insulating stand 3 is formed into a flat surface, and a tape is attached to the first sign 5b. , Similarly, the second mark i6b is also pasted with tape as a flat surface,
20 is an example in which both IIs are colored with paint, and FIG.
The state where the sign 6b is visible is shown. This embodiment aims to improve economical efficiency by simplifying the movable insulating stand 4 and the signs 5b and 6b.

FIG. 21 is an embodiment of the embodiment shown in FIG. 8 in which the outside of the opening cover 4 is shaped like a truncated cone so that the non-excited state can be visually observed even from an oblique direction through the slope 4g of the opening cover 4. In Fig. 22, the central part of the opening cover 4 on the side opposite to the conical protrusion 4f is shaped like a caldera, and outwardly there are slopes 4h,
4g is formed, and the excitation state can be visually observed from the diagonal direction of the slope 4h, and the 21st
．． Both of the embodiments shown in FIG. 22 are intended to expand the JRra display field of view.

FIG. 23 is a diagram showing an embodiment in which the opening cover 4 is further extended to the terminal portion, whereby the terminal portion is covered and electric shock can be prevented.

The indicating means for identifying the displacement operation position of the pressing part described in the claims is not limited to the optical display presented in the embodiment, and may induce a change in position or state of at least a portion of the opening cover. For example, the opening mechanism may be linked to the opening mechanism of the opening cover.

〔Effect of the invention〕

By implementing the present invention, the following effects are achieved.

By covering the opening with a light-transmissive cover that can be opened and closed or removed, it provides functions for sequence check and display of the operating status of the electromagnetic contactor, as well as ensuring the safety of the operator.
Further, by covering the opening, the interrupting performance can be improved without strengthening the arc extinguishing device, and it is possible to achieve higher performance and smaller size. Furthermore, the intrusion of foreign matter can be prevented, and reliability is significantly improved.

By providing the cover with a protrusion that transmits and refracts light to optically display the operating status, visual confirmation is extremely easy, which prevents misidentification by the operator and contributes to ensuring safety. It is effective.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the operation display device for an electromagnetic contactor according to the present invention, and FIGS. 2 and 6 are partial cross-sections taken along the line B-B in FIG. 3(a) and 3(b) are explanatory diagrams of the operation of FIG. 2, FIG. 4 is an exploded perspective view of one embodiment of the present invention, and FIG. 5 is a diagram showing the excitation state of the electromagnetic contactor. An embodiment of the guide section shown in the cross section taken along the line C-C in the figure, and FIGS. 7 to 10 are side partial sectional views for explaining the operation display mechanism in the embodiments of FIGS. 1, 2, and 6. , FIG. 11, and FIG. 12 are perspective views showing other embodiments of the operation display section display body of the present invention, and FIGS. 13(a), (b), and (c) are perspective views showing one embodiment of the opening cover. Perspective view and sectional view, 14th
16 are cross-sectional views of other embodiments of the opening cover, FIG. 17 is a cross-sectional view showing other embodiments of the operation display section, and FIG.
The figure is a partially enlarged view of FIG. 17, and FIGS. 19 and 20 are explanatory diagrams of other embodiments of the operation display section. FIG. 21 and FIG. 22 are explanatory diagrams of still another embodiment, and FIG.
3 is a side partial sectional view showing an embodiment in which the opening cover is extended to the terminal portion, FIG. 24 is a front view of a conventional electromagnetic contactor, FIG. 25 is a side partial sectional view of FIG. 24, and FIG. The figure is a sectional view for explaining the operation of a conventional display device.

Claims (1)

[Scope of Claims] 1. An operation display device for an electromagnetic contactor that includes a fixed insulating stand and a movable insulating stand and opens and closes a contact by a displacement operation of the movable insulating stand, wherein at least a pressing force for displacing the movable insulating stand is provided. a translucent opening cover that covers an opening facing the area and that can be opened and closed with one end as a rotation fulcrum and the other end as a locking end, or that can be attached and detached with at least one end as a locking end, and the opening An operation display device for an electromagnetic contactor, comprising display means for identifying a displacement operation position of the pressing portion through a cover. 2. The display means for identifying the displacement operation position of the pressing part,
a translucent conical part provided on the inside of the opening cover; a first mark provided on the inner surface of the envelope surrounding the conical part at the tip of the pressing part; and facing the conical part. and a second mark provided on a part of the fixed insulating stand or a part of the opening cover, and the first and second marks can be visually distinguished by refracted light passing through the conical part. An operation display device for an electromagnetic contactor according to claim 1. 3. The display means for identifying the displacement operation position of the pressing part,
A chevron-shaped protrusion provided at the center of the outer surface of the opening cover, a first mark provided on the plane of the pressing portion facing the inner surface of the cover, and a first mark provided on the fixed insulating stand facing the inside of the cover. 2. The electromagnetic contactor operation display device according to claim 1, wherein the first and second signs are visually distinguished by refracted light passing through the chevron-shaped protrusion. 4. The display means for identifying the displacement operation position of the pressing part,
It consists of a concave mirror part with a central part of the pressing part protruding, and first and second marks provided on the fixed insulating stand or the opening cover, and an enlarged image of the first or second mark reflected by the concave mirror. An operation display device for an electromagnetic contactor according to claim 1, characterized in that the operation display device for an electromagnetic contactor is configured so as to be visually identified by the following. 5. Regarding sliding between the fixed insulating stand and the movable insulating stand due to the displacement movement of the pressing part, a U-shaped path leading to the opening is formed across an insulating wall provided on the fixed insulating stand; The electromagnetic contact according to claims 1, 2, 3, and 4, characterized in that the anti-center side surface of the U-shaped path and the outer surface of the insulating wall slide with each other. Equipment operation display device. 6. The sliding surface is provided deeper than the opening separated by the insulating wall of the fixed insulating stand, so that abrasion powder caused by sliding is not scattered outside the opening. The electromagnetic contactor according to claim 5. 7. The operation display device for an electromagnetic contactor according to claim 1, wherein the cover is extended to cover an upper surface of a terminal portion of the electromagnetic contactor. 8. The electromagnetic contactor operation display device according to claim 2, wherein the outer surface of the cover is a frustoconical or caldera-shaped prism to expand the field of view.