TW202038278A - Cover of air circuit breaker - Google Patents

Abstract

A cover of an air circuit breaker of the present invention includes a cover body (20), and two or more engagement pieces (3) that are cantileverally supported by the cover body (20) and engaged with an engagement object of the air circuit breaker. Each of the two or more engagement pieces (3) has an V-shaped elastic portion (31) having a base end supported on an base end of the cover body (20), and a project portion (32) disposed on the distal end of the elastic portion (31) and engaged with the engagement object.

Description

Cover of air circuit breaker

The invention relates to a cover of an air circuit breaker constructed in a detachable manner.

In the past, the circuit breaker was provided with a cover installed on the circuit breaker body in a removable manner. For example, Patent Document 1 discloses a technique of providing a snap-fit structure to the cover attached to the circuit breaker body in order to be detachable. (Prior technical literature) (Patent Document)

Patent Document 1: Japanese Patent Application Publication No. 2009-266480

(The problem to be solved by the invention)

The air circuit breaker can be installed with accessories, and the accessories can be replaced or added even after it is installed in the switchboard. It has a structure in which the cover can be detached from the circuit breaker body. In order to withstand the internal pressure of the gas generated when the circuit is disconnected, the cover generally adopts a structure in which a plurality of parts are fixed to the main body of the gas circuit breaker using fixing members such as screws. Therefore, it is difficult to easily replace or add accessories.

When the cover that covers the accessories uses the snap structure described in Patent Document 1, although the replacement or addition of the accessories can be performed easily, the fixing strength against the internal pressure of the gas generated when the circuit is disconnected may be insufficient possibility. In addition, this is not limited to the cover covering the accessory, and the same applies to other covers that are applied with the internal pressure of the gas generated when the circuit is disconnected.

The present invention is developed in view of the above-mentioned problems, and its purpose is to obtain a cover for a gas circuit breaker that has a fixed strength against the gas internal pressure generated when the circuit is disconnected and can be easily removed. (Means to solve the problem)

In order to solve the above-mentioned problems and achieve the objective, the cover of the air circuit breaker of the present invention is provided with: a cover body; and two or more engaging pieces, which are supported on the cover body in a cantilever manner and are interrupted by the air The locking object of the router is locked. Each of the two or more engaging pieces has: a V-shaped elastic portion, the base end of which is supported on the end of the cover body; and a protruding portion, which is provided at the front end of the elastic portion and engages with the object of engagement. Together. (Effect of Invention)

According to the present invention, it is possible to exert the effect of having a fixed strength against the gas internal pressure generated at the time of disconnection and being easily removable.

Hereinafter, the cover of the gas circuit breaker according to the embodiment of the present invention will be described in detail based on the drawings. In addition, the present invention is not limited by this embodiment.

Embodiment 1 Figure 1 is a perspective view showing the appearance of the cover of the air circuit breaker according to Embodiment 1 of the present invention. Figure 2 is a front view of the cover of the air circuit breaker in the first embodiment.

As shown in Figures 1 and 2, the cover 100 of the air circuit breaker is provided with: a main cover 1 installed on the box body 200, and an accessory cover for attachment and detachment installed on the main cover 1 in a removable manner Cover 2. In addition, in the first figure, the outer shape of the box body 200 is shown by imaginary lines, but the shape of the box body 200 is not limited to the example shown in the first figure.

In addition, the main cover 1 includes: a first front wall 11 on which an on button, an off button, a display, etc. are arranged; and one end is connected to the outer edge of the first front wall 11 and extends from one end to the other end A plurality of side walls 12, 13, 14, 15 to the side of the box body 200. In addition, the main cover 1 is provided with a second front wall portion 16 whose one end is connected to the other end of the side wall portion 12, is parallel to the first front wall portion 11 and extends in a direction separating from the other end of the side wall portion 12; and The third front wall portion 17 is continuous with the other end of the side wall portion 13 and is parallel to the first front wall portion 11 and extends in a direction away from the other end of the side wall portion 13.

In addition, the main cover 1 is provided with a side wall 18 whose one end is connected to the other end of the second front wall portion 16 and extends from one end to the other end to the box body 200 side; and one end thereof is connected to the third front wall portion The other end of 17 extends from one end to the other end to the side wall 19 on the side of the box body 200.

A plurality of fixing portions 16 a and 16 b are formed in the second front wall portion 16, a plurality of fixing portions 17 a and 17 b are formed in the third front wall portion 17, and a fixing portion 18 a is formed in the side wall portion 18. The fixing parts 16a, 16b, 17a, 17b, 18a and the box body 200 are fixed by screws. Thereby, the main cover 1 is firmly fixed to the box body 200, and the fixing strength of the gas internal pressure generated when the air circuit breaker is disconnected can be ensured.

The cover 2 for attachment and detachment is provided with a cover main body 20 covering accessories not shown in the figure, and two engagement pieces 3 supported on the end of the cover main body 20 in a cantilever manner. In addition, the cover body 20 has a concave engagement portion 4 into which a convex engagement portion (not shown) of the main cover 1 is inserted. The attachment/detachment cover 2 is fixed to the main cover 1 by the two engagement pieces 3 and the engagement portion 4. In addition, the accessories not shown in the figure are, for example, a voltage overload protection device that turns off the air circuit breaker from the remote end, a voltage undervoltage protection device that turns off the air circuit breaker when the circuit voltage is lower than the reference, and An auxiliary switch that electrically displays the open or open state of the air circuit breaker.

The cover body 20 is provided with: the notch part of the first front wall part 11 of the main cover 1 and the front wall part 21 which is located on the same plane as the first front wall part 11; one end of which is connected to the front wall part 21 upper end, and extending from one end to the other end to the side wall portion 22 of the box body 200; and one end of which is connected to one side end of the front wall portion 21 and extends from one end to the other end to the side wall portion of the box body 200 side twenty three. In addition, the cover body 20 further includes a protruding portion 24, one end of which is continuous with the other end of the side wall portion 23, and is parallel to the front wall portion 21 and extends in a direction separated from the other end of the side wall portion 23. The protruding portion 24 is located on the same plane as the second front wall portion 16.

Each engaging piece 3 has a snap structure. The concave engagement portion 4 formed in the cover body 20 is inserted with the not-shown convex engagement portion of the main cover 1, and the two engagement pieces 3 and the second front wall of the main cover 1 The part 16 is engaged, thereby fixing the accessory cover 2 for attachment to the main cover 1. Hereinafter, the engagement between the main cover 1 and the accessory cover 2 for attachment and detachment by the two engagement pieces 3 and the engagement portion 4 will be specifically described.

Fig. 3 is a diagram showing a state in which the attachment/detachment cover of the first embodiment is removed from the main cover. Fig. 4 is a perspective view of the external appearance of the engaging piece of the attachment/detachment cover of the first embodiment. Figure 5 is a cross-sectional view taken along line V-V in Figure 2.

As shown in FIG. 3, the engagement between the two engagement pieces 3 of the accessory cover 2 for attachment and detachment and the second front wall portion 16 of the main cover 1 can be released by using a tool 300 such as a flat screwdriver.

As shown in Fig. 4, the engaging piece 3 has: a V-shaped elastic portion 31 whose base end is supported at the other end of the protrusion 24; and is provided at a position separated from each other at the front end of the elastic portion 31, and A pair of protrusions 32 is engaged with the second front wall portion 16.

The elastic portion 31 has a first extension portion 31a whose base end is supported on the other end of the protrusion portion 24 and extends from the base end to the front end in a direction orthogonal to the direction of extension of the protrusion portion 24; The front end of the first extension portion 31a is a reflexed portion 31b that is reflexed toward the second front wall portion 16. In addition, the elastic portion 31 has a second extension portion 31c whose base end is connected to the front end of the reverse-folded portion 31b and extends toward an area facing the first extension portion 31a. The second extension portion 31c is in a direction facing the first extension portion 31a, and extends so as to be separated from the first extension portion 31a as it moves from the base end to the tip end.

In addition, the engaging piece 3 has: a guide groove 33 at the front end of the guide tool 300; and a hooking rib 34 for hooking the front end of the tool 300. The guide groove 33 and the hooking rib 34 are formed at the center of a pair of the protrusions 32 in the direction in which the front end of the elastic portion 31 faces each other.

As shown in FIG. 5, the end of the second front wall portion 16 facing the engagement piece 3 is provided with an engagement portion 7. The engaging portion 7 has: an engaging surface 71 belonging to the side of the box body 200; and an inclined surface formed on the side opposite to the box body 200 and inclined toward the side of the box body 200 toward the front end 72. In the state shown in Figure 5, the protrusion 32 of the engaging piece 3 will abut against the engaging surface 71 of the engaging portion 7, and the protrusion 32 of the engaging piece 3 will be engaged with the engaging portion 7 status. This suppresses the attachment/detachment cover 2 for attachment from the main cover 1.

In addition, the accessory cover 2 for attachment and detachment is engaged with the main cover 1 by using two engaging pieces 3, so it can be firmly fixed to the main cover 1, and it can ensure that the gas generated when the air circuit breaker is disconnected The fixed strength of internal pressure. In addition, the cover 2 for attachment/detachment may have a structure with three or more engaging pieces 3. In addition, between the two engaging pieces 3 in the main cover 1, since the fixing portion 16a is fixed to the box body 200 by screws, the position of the engaging portion 7 can be prevented from being generated when the air circuit breaker is disconnected. Changes in gas internal pressure. Thereby, the fixing strength of the gas internal pressure generated when the air circuit breaker is disconnected can be more ensured.

Next, the method of removing the cover 2 for attachment/detachment from the main cover 1 is demonstrated. Fig. 6 is a diagram for explaining the method of removing the attachment/detachment cover of the first embodiment from the main cover. As shown in Figure 6, in the state where the accessory attachable and detachable cover 2 is attached to the main cover 1, the recessed engaging portion 4 formed in the cover body 20 is inserted into the main cover 1 The convex engaging portion 5 of the first front wall portion 11.

As shown in FIG. 6, the attachment/detachment cover 2 is removed from the main cover 1 by inserting the front end of the tool 300 into the engagement piece 3. Specifically, by inserting the front end of the tool 300 into the guide groove 33 shown in Fig. 5 of the engaging piece 3, the front end of the tool 300 will be guided to the position where the rib 34 shown in Fig. 5 is engaged. The card is hung on the card-hanging rib 34. In this state, by moving the front end of the tool 300 in the direction in which the elastic portion 31 of the engaging piece 3 is flexed, the protrusion 32 of the engaging piece 3 moves in the direction of separating from the engaging portion 7.

In a state where the pair of protrusions 32 are separated from the engagement portion 7, the attachment/detachment cover 2 can be rotated about the engagement portion 5 as the center of rotation. By rotating the cover 2 for attachment and detachment in the counterclockwise direction in Fig. 6, as shown in Fig. 6, the cover 2 for attachment and detachment can be detached from the main cover 1.

Here, the force applied to the engaging piece 3 when the cover 2 for attachment/detachment is removed from the main cover 1 is demonstrated. Fig. 7 is a cross-sectional view for explaining the force applied to the engaging piece when the cover for attachment/detachment of the first embodiment is removed from the main cover. Fig. 8 is a diagram showing a state where the engagement between the engagement piece of the cover for attachment and detachment and the main cover of the first embodiment is released.

When the operator flexes the elastic portion 31 of one engagement piece 3 with the tool 300, when the attachment/detachment cover 2 rotates with the engagement portion 5 shown in FIG. 6 as the center of rotation, It becomes the state shown in Figure 7. In the state shown in Fig. 7, the elastic portion 31 of one engaging piece 3 is bent by the engaging portion 7. In the elastic portion 31, an intention to return is shown as an imaginary line. The force of the original shape 9 is the force in the direction of arrow A.

In addition, since the rotation center of the attachment/detachment cover 2 is the engaging portion 5 shown in Fig. 6, as shown in Fig. 7, the rotation of the attachment/detachment cover 2 engages the elastic portion of the piece 3 31 moves on a circular arc track 51 centered on the engaging portion 5. Therefore, the elastic portion 31 of the engaging piece 3 moves in a direction approaching the inclined surface 72 as it moves in the direction of the arrow B. Therefore, the force to return to the original shape 9 of the elastic portion 31, that is, the force generated in the elastic portion 31 in the direction of arrow A can be increased.

In addition, as described above, the inclined surface 72 is formed in the engaging portion 7, and the elastic portion 31 abuts against the inclined surface 72 in the state shown in FIG. 7. Therefore, the inclined surface 72 generates a force to move in the direction of arrow B with the engaging portion 5 as the center of rotation. The direction of arrow B is the direction in which the accessory attaching and detaching cover 2 in the arc track 51 of the elastic portion 31 with the engaging portion 5 as the rotation center is removed from the main cover 1.

Therefore, even if the operator separates the hand from the attachment cover 2 for attachment and detachment, the position of the engaging piece 3 on one side will still be maintained at the position shown in Figure 7, as long as the direction opposite to the direction of arrow B is not deliberately applied The external force will not return to the position shown in Figure 5.

In this state, when the elastic portion 31 of the other engaging piece 3 is flexed, the force of the one engaging piece 3 to move in the direction of arrow B is generated, and the attachment and detachment cover 2 will Move in the direction of arrow B. Thereby, as shown in FIG. 8, the cover 2 for attachment and detachment is removed from the main cover 1. Thereby, the accessory attaching and detaching cover 2 having the configuration of two or more engaging pieces 3 can be easily detached from the main cover 1.

In addition, the cover 100 may also have the following configuration: when the elastic portion 31 of the other engaging piece 3 is flexed in the state shown in FIG. 7 with the engaging piece 3 on one side, a cover for attachment and detachment is attached The cover 2 will not move in the direction of arrow B. Even in this case, a force to move in the direction of arrow B is generated on the engaging piece 3 on one side. Therefore, the operator can easily remove the accessory cover 2 for attachment and detachment from the main cover 1 by reducing the force of moving the accessory cover 2 for attachment and detachment in the direction of arrow B.

Here, it is assumed that the center of rotation is the end portion 8 shown in Fig. 6 instead of the engaging portion 5 shown in Fig. 6. Figure 9 is a diagram for explaining the force generated in the elastic portion of the engaging piece when the rotation center is assumed to be closer to the box side than the rotation center shown in Figure 6.

As shown in Fig. 9, when the end 8 shown in Fig. 6 becomes the rotation center of the cover 2 for attachment and detachment, the elastic portion 31 of the engaging piece 3 moves to the end 8 shown in Fig. 6 The arc track 52 at the center. At this time, the elastic portion 31 of the engaging piece 3 moves in the direction of separation from the inclined surface 72 as it moves in the direction of arrow C. Therefore, the force generated in the direction of arrow A is compared with that shown in Fig. 7 The situation is weak.

On the other hand, when the engaging portion 5 shown in FIG. 6 becomes the center of rotation of the accessory cover 2 for attachment and detachment, the elastic portion 31 of the engaging piece 3 moves in the direction approaching from the inclined surface 72 as described above. Compared with the state shown in Figure 8, the force generated in the direction of arrow A is stronger. Therefore, the attachment/detachment cover 2 of the first embodiment can raise the force that moves the cover body 20 in the direction of arrow B.

In addition, the elastic portion 31 of the engagement piece 3 is formed in a V-shape, and therefore, the amount of deflection can be increased compared with the case where it is formed in a U-shape. Therefore, when the elastic portion 31 of the engaging piece 3 moves in the direction approaching from the inclined surface 72, the force to return to the original shape 9 of the elastic portion 31 can be increased. Therefore, the attachment/detachment cover 2 having the configuration of two or more engaging pieces 3 can be easily detached from the main cover 1.

In addition, although the object provided with the engaging piece 3 and the engaging portion 4 is the accessory cover 2 for attachment and detachment, the engagement piece 3 and the engagement portion 4 are not limited to the accessory cover 2 for attachment and detachment, and may be provided in A cover other than the cover 2 for attachment and detachment that is applied with the internal pressure of the gas generated when the circuit is disconnected. In addition, the engagement object of the accessory cover 2 for attachment and detachment can also be the box body 200 instead of the main cover 1.

In addition, in the above example, the engaging portion 4 is formed in a concave shape and the engaging portion 5 is formed in a convex shape, but it is not limited to this example. For example, the cover 100 may be configured as a configuration in which the engaging portion 4 is formed in a convex shape and the engaging portion 5 is formed in a concave shape.

As described above, the cover 2 for attachment and detachment of the cover 100 includes: a cover body 20; and cantilever supported on the cover body 20, and is engaged with the main cover 1 which is the object of engagement with the air circuit breaker Combine two or more snap-fit pieces 3. Each engaging piece 3 has: a V-shaped elastic portion 31 whose base end is supported at the end of the cover body 20; and a protruding portion 32 provided at the front end of the elastic portion 31 and engaged with the engaging object. In this way, the accessory cover 2 for attachment and detachment is locked to the main cover 1 by using the two engagement pieces 3, so it is firmly fixed to the main cover 1, and it can ensure that the air circuit breaker is interrupted. The fixed strength of the gas internal pressure. In addition, the engaging piece 3 has a snap structure, so that the cover 2 for attachment and detachment can be easily detached and attached when the attachment is replaced or added. In addition, the elastic portion 31 of the engaging piece 3 is formed in a V shape, so the amount of deflection can be increased. Therefore, for example, the force of the elastic portion 31 to return to the original shape 9 is increased, and the force of movement in the direction of removing the accessory attaching and detaching cover 2 is increased, so it is possible to have more than two cards The cover 2 for attachment and detachment of the structure of the hinge 3 can be easily removed from the main cover 1.

In addition, the cover body 20 has an engaging portion 4, and the engaging portion 4 is capable of rotating when the cover body 20 is removed from the main cover 1, and provides two or more of the main cover 1 The engaging piece 3 engages with the engaging portion 7 which is different from the engaging portion 5 for engaging. The engaging portion 7 is an example of a first engaging portion, the engaging portion 5 is an example of a second engaging portion, and the engaging portion 4 is an example of an engaging portion of the cover body. The engaging portion 4 is arranged at a position where the elastic portion 31 of the engaging piece 3 approaches the engaging portion 7 when the cover body 20 is removed from the main cover 1. Thereby, the force to move the cover main body 20 in the direction in which the cover 2 for attachment/detachment is removed from the main cover 1 can be increased. Therefore, the attachment/detachment cover 2 having the configuration of two or more engaging pieces 3 can be easily detached from the main cover 1.

In addition, the cover 100 is provided with: an accessory attachment and detachment cover 2 covering the accessories of the air circuit breaker, the attachment and detachment cover 2 having a cover body 20 and two or more engaging pieces 3; and a main cover Cover 1 is equipped with cover 2 for attachment and detachment. The attachment/detachment cover 2 is an example of the first cover, and the main cover 1 is an example of the second cover. Thereby, the cover 100 can be partially removed, and compared with the case where the whole cover 100 is removed, the replacement or addition of accessories can be easily performed.

Embodiment 2 The cover of the air circuit breaker of the second embodiment is different from the cover of the air circuit breaker of the first embodiment in that the engaging piece has a grip portion. Hereinafter, the constituent elements having the same functions as those of the first embodiment are given the same reference numerals and their descriptions are omitted, and the description will focus on the differences from the cover 100 of the first embodiment. Fig. 10 is a diagram showing an example of the cover of the gas circuit breaker according to the second embodiment of the present invention.

As shown in Fig. 10, the cover 100A of the air circuit breaker according to the second embodiment includes a main cover 1 and a cover 2A for attachment and detachment. The attachment/detachment cover 2A includes a cover body 20 and an engagement piece 3A. The engagement piece 3A is different from the engagement piece 3 in that it has a grip portion 35. The grip portion 35 protrudes toward the outside of the main cover 1 in a state where the accessory attaching and detaching cover 2A is attached to the main cover 1. , And can be held by the industry with fingers. In addition, the cover 2A for attachment and detachment is provided with two or more engaging pieces 3A.

The base end of the grip portion 35 is connected to the front end of the elastic portion 31, and the front end protrudes from the second front wall portion 16 in the state shown in FIG. 10. The operator can hold the handle portion 35 and move it toward the cover body 20 to release the engagement between the elastic portion 31 of the engaging piece 3A and the engaging portion 7 of the second front wall portion 16 . In addition, in the attachment/detachment cover 2A, the grip portion 35 is provided in each engagement piece 3A, but the grip portion 35 may be provided in at least one of the two or more engagement pieces 3A.

As described above, in the attachment/detachment cover 2A of the cover 100A of the second embodiment, at least one of the two or more engaging pieces 3A is provided with a grip portion that flexes the elastic portion 31 35. This makes it possible to easily release the engagement between the attachment/detachment cover 2A and the main cover 1. Therefore, the attachment/detachment cover 2A can be easily detached from the main cover 1.

The configuration shown in the above embodiment shows an example of the content of the present invention, and may be combined with other conventional technologies, and part of the configuration may be omitted or changed without departing from the scope of the present invention.

1: Main cover 2, 2A: attached cover for loading and unloading 3. 3A: snap-fit piece 4, 5, 7: snap part 8: end 9: shape 11: The first front wall 12, 13, 14, 15, 18, 19, 22, 23: side wall 16: The second front wall 16a, 16b, 17a, 17b, 18a: fixed part 17: 3rd front wall 20: Cover body 21: Front wall 24: protrusion 31: Elastic part 31a: first extension 31b: Reflex 31c: 2nd extension 32: protrusion 33: Guiding Ditch 34: Card hanging ribs 35: Grip 51, 52: arc track 71: snap surface 72: Inclined surface 100, 100A: cover 200: box 300: Tools A, B, C: arrow

Figure 1 is an external perspective view of the cover of the air circuit breaker according to Embodiment 1 of the present invention. Figure 2 is a front view of the cover of the air circuit breaker in the first embodiment. Fig. 3 is a diagram showing a state in which the attachment/detachment cover of the first embodiment is removed from the main cover. Fig. 4 is a perspective view of the external appearance of the engaging piece of the attachment/detachment cover of the first embodiment. Figure 5 is a cross-sectional view taken along line V-V in Figure 2. Fig. 6 is a diagram for explaining the method of removing the attachment/detachment cover of the first embodiment from the main cover. Figure 7 is a cross-sectional view for explaining the force applied to the engagement piece when the cover for attachment and detachment of the first embodiment is removed from the main cover Fig. 8 is a diagram showing a state where the engagement between the engagement piece of the cover for attachment and detachment and the main cover of the first embodiment is released. Figure 9 is a diagram for explaining the force generated in the elastic portion of the engaging piece when the rotation center is assumed to be closer to the box side than the rotation center shown in Figure 6. Fig. 10 is a diagram showing an example of the cover of the gas circuit breaker according to the second embodiment of the present invention.

1: Main cover

2: attached cover for loading and unloading

3: Clip

4, 5, 7: snap part

8: end

20: Cover body

31: Elastic part

32: protrusion

100: cover

300: Tools

Claims (4)

A cover for an air circuit breaker, which is provided with: Cover the body; and Two or more engaging pieces are supported on the cover body in a cantilever manner, and engage with the engaging object of the air circuit breaker; Each of the above two or more snap-fit pieces has: The V-shaped elastic part, the base end of which is supported on the end of the cover body; and The protruding part is arranged at the front end of the elastic part and is engaged with the engagement object. The cover of the air circuit breaker described in the first item of the scope of patent application, wherein at least one of the two or more engaging pieces is provided with a grip portion that flexes the elastic portion. Such as the cover of the gas circuit breaker described in item 1 or item 2 of the scope of patent application, wherein: The aforementioned cover system is provided with a cover body engaging portion, and the cover body engaging portion is provided with the aforementioned engaging object in a manner that the cover body can be rotated when detached from the aforementioned engaging object The first engaging part of the aforementioned two or more engaging pieces is different from the second engaging part; and The cover body engaging portion is arranged at a position where the elastic portion will approach the first engaging portion when the cover body is detached from the engagement target. For example, the cover of the air circuit breaker described in item 1 or item 2 of the scope of patent application shall have: A first cover covering the accessories of the aforementioned air circuit breaker, the first cover having the aforementioned cover body and the aforementioned two or more engaging pieces; and The second cover belonging to the aforementioned engagement object is attached with the aforementioned first cover.

Images