KR101465267B1 - Handle lock apparatus of circuit breaker - Google Patents

Abstract

A handle lock device of a circuit breaker which is easy to mount on a breaker handle of a lock cover and which can sufficiently lock the handle with only a lock cover, the means for which is provided by means of a flexible material, A handle lock cover formed in an H-shape by a pair of arm members and a connecting member connecting the pair of arm members at the intermediate portion is provided, and the opposite side of the arm member on the tip side of the lock cover Wherein a protrusion that engages with a relief hole of a handle portion of the handle is provided on an inner side surface of the lock cover and an engaging portion that engages with an opening portion that is engaged with an opening portion of the cover is provided at an end portion of a base end side arm member of the lock cover, End side of the distal end side arm member is widened to widen the gap between the both arm members at the distal end side arm member end, And the arm member on the proximal end side is engaged with the opening of the cover to lock the handle to the circuit opening position or the circuit closing position.

 Circuit breaker, case of circuit breaker, cover of circuit breaker, opening of cover

Description

[0001] DESCRIPTION [0002] HANDLE LOCK APPARATUS OF CIRCUIT BREAKER [0003]

The present invention relates to a handle lock device for locking an operation handle of a circuit breaker such as a wiring breaker or an earth leakage breaker in a circuit open state and a circuit closed state.

The handle lock device of the circuit breaker is designed to lock the operation handle to the circuit closing (ON) position or the circuit opening (OFF) position in order to prevent the circuit breaker from being inadvertently opened and closed .

Figs. 13 to 19 show the structure of a conventional handle lock device shown in Patent Document 1. Fig.

13A is a front view of the handle lock cover of the conventional handle lock device, FIG. 13B is a side view of the handle lock cover of FIG. 13A, FIG. 13C is a cross- A in Fig. As shown in Fig. 13, the lock cover 20 has a pair of parallel arm portions 20A and 20B, and is connected at the lower end to form a U-shape. A guide 21 is provided on the outer side (seat surface) of the arm 20A so as to be elongated in the vertical direction and a concave hole 22 perpendicular to the ground is formed on the upper side of the guide 21. In addition, claw grooves 23 as shown in Fig. 13 (C) are formed on both sides of the lower portion of the arm portion 20A. Each of the arm portions 20A and 20B is provided with an L-shaped fitting portion 26 on the outer side surface thereof, and on both inner side surfaces of the arm portions 20A and 20B, The convex portion 25 and the step 24 are provided. A key hole 27 penetrating both the fitting portion 26 and the arm portion 20B on the right side of Fig. 13 (A) is provided as shown in Fig. 13 (B).

The lock cover 20 is made of a flexible material such as polyamide-based resin or ABS resin, and the upper end of the arm portions 20A and 20B can be opened. The hooking groove 23 is for binding a string or the like of a display tag for display when the handle is locked. Further, the keyhole 27 is for passing through the loop of the padlock. The function of the fitting portion 26 will be described later, but when the lock holder is inserted and inserted, the end portion of the arm portion is inserted. The role of the convex portion 25 and the step 24 will be described later, but it plays a role of fitting to the handle portion.

As shown in Fig. 14, in the circuit breaker, the handle 9 connected to the front end of the operation handle for opening and closing the opening / closing mechanism of the inside opens / closes the opening of the cover 4 covering the upper portion of the case 5 of the circuit breaker (4A). The circuit breaker 1 is provided with an opening / closing lever (not shown) for opening / closing the opening / closing mechanism by pivoting the circuit breaker 1 with its one side end point as a point. At the end on the opposite side of the opening / A combined operating handle of one handle 9 is engaged. Therefore, the opening / closing mechanism can be manually opened / closed by manually moving the handle 9 up or down. The handle 9 is formed with a relief portion 9A cut in the right and left direction in Fig. The relief portion 9A is provided for preventing deformation of the handle 9 when the handle is resin molded and for reducing the amount of resin required.

As shown in Fig. 14, when the knob 9 is tilted upward, the circuit breaker is in the circuit-closed (ON) state. In this state, when the handle of the circuit breaker is to be locked, the open upper end of the arm portions 20A, 20B of the lock cover 20 is raised and the tip ends thereof are slightly opened. As shown by the dotted arrow 28, The grip portion 9 is sandwiched from both sides by the engaging portions 20A and 20B to fit the convex portion 25 provided inside the both arm portions to the relief portion 9A. The step 24 is engaged with the outer shape of the handle 9.

15, the arm portion of the lock cover 20 is engaged with the handle portion 9 and the protruding portion 30 of the arm portions 20A, 20B is fitted into the opening 4A of the cover of the circuit breaker, The handle 9 is fixed and can not be tilted so that the operation handle can be locked.

As shown in Fig. 16, when the handle 9 is tilted downward to lock the handle by turning the circuit breaker to the circuit open (off) state, the lock cover 20 is reversed from the state of Fig. 14 20B are directed downward and the clearance of the opening end is slightly opened so that the arm portions 20A and 20B can be opened by the arm portions 20A and 20B The grip 9 is fitted from both sides and the convex portion 25 of the arm portion is fitted to the relief hole 9A of the handle 9. Then, the upper end of the lock cover 20 is inserted into the opening 4A of the cover.

17, the arm portion of the lock cover 20 is engaged with the handle portion 9 and the projections 30 of the arm portions 20A and 20B are engaged with the rim of the opening portion 4A of the circuit breaker cover, The grip 9 is fixed and can not be tilted at all, even if the grip 9 is lifted upwards in this state.

13 (C), the presence of the plurality of convex portions 25 means that even when the handle 9 of the handle is directed in any direction in the up-and-down direction in the circuit-opened state or the circuit- (25) to fit properly. It is also the same reason that the lower stepped portion 24 is formed as a dagger.

18 and 19, when the handle 9 of the operation handle of the circuit breaker to which the lock cover 20 is coupled is corrected as described above, the lock holder 20 is provided with the lock holder 31 Receive inlay.

Fig. 18 shows a correcting process in the circuit closing (on) state of the circuit breaker in which the handle portion 9 of the operation handle is inclined upward, Fig. 19 shows a state in which the handle portion 9 of the operation handle is inclined downward And shows the correcting process in the circuit open (off) state of the moved circuit breaker.

18 (A), first, the lock holder 31 is pushed from the upper side to the lock cover 20 engaged with the handle 9, and the lock holder 20 The slit 34 of the lock holder 31 is fitted into the guide 21 of the arm portion 20B of the lock arm 20B. By pushing the lock holder 31 until the lower end of the lock holder 20 is fitted with the fitting portion 26 of the lock cover 20 as shown in Fig. 18 (B), the lock cover 20 And is held by the lock holder 31 from the outside. The lock 10A of the lock 10 is inserted and fixed between both the keyhole 32 of the lock holder 31 and the keyhole 27 of the lock cover 20 so that the circuit breaker is locked to the handle 9 Is locked by the lock 10 through the lock holder 31 so that the lock of the operation handle can not be inadvertently released.

19A and 19B show the correcting process in the circuit open (off) state of the circuit breaker. As shown in Fig. 19A, the lock holder 31 is fixed to the lock portion 9 of the circuit breaker, 18, except that it is inserted from the lower side of the cover 20, detailed description thereof will be omitted.

As described above, the conventional handle lock device of the circuit breaker is provided with a lock cover made of a flexible material and formed in a U-shape, and the handle portion of the operation handle of the circuit breaker can be inserted and inserted into the arm portions of the lock cover The convex portion is formed so as to protrude from the inside of the both arm portions so as to face each other and to be fittable into the relief hole of the handle portion, Protruding in the width direction of the arm portion on the side of the arm portion on the succeeding side of the arm portion and being fitted into the opening portion when the convex portion is fitted in the relief hole and coming into contact with the rim portion of the opening portion. The handle can be locked simply by inserting the lock cover into the hand grip of the circuit breaker.

In this configuration, a lock having a lock holder formed of a flexible material and formed in a U-shape and a ring is provided, and a lock cover is insertably inserted into both arms of the lock holder, The slit is formed from a succeeding portion to an end portion of the arm portion and is fittable with a guide provided on one arm portion of the lock cover. The other arm portion of the lock cover and the lock holder Each of the other arm portions is provided with a keyhole through which the ring of the lock can pass. Thereby, the handle can be locked without a keyhole in advance in the handle of the circuit breaker. A user who has used a circuit breaker without a keyhole in the handle portion can suddenly cope with the sudden change of the specification, which is very convenient.

Patent Document 1: JP-A-09-270224

In the above-described conventional handle lock apparatus, when the U-shaped lock cover is mounted on the handle of the operation handle of the circuit breaker, in order to facilitate the pushing of the tip of the parallel arm, The arm portion formed by the resin is formed to have an extremely thin thickness. Therefore, the lock cover can not secure sufficient rigidity and elastic strength, and in a state in which the lock is not engaged, the lock cover mounted on the handle portion is simply peeled off from the handle (the handle portion) There is a problem in reliability and reliability. Further, since the lock can not be locked by only the lock cover, there is a problem that it is difficult to use the lock in combination with the lock holder at all times in order to reliably lock the handle.

It is an object of the present invention to solve the problems in the conventional apparatus and to improve the rigidity of the lock cover so that the lock cover can be easily attached to the handle of the lock cover breaker and the mounted lock cover is not peeled off from the handle with a slight external force And it is an object of the present invention to provide a handle lock device of a circuit breaker which can sufficiently lock a handle with only a lock cover.

According to an aspect of the present invention, there is provided a circuit breaker comprising: a case that accommodates an opening / closing mechanism of a circuit breaker; a cover that covers the case; a side surface that is parallel to a surface, A circuit breaker comprising a handle having a hole formed therein and a handle for opening and closing the opening and closing mechanism by pivoting, the circuit breaker comprising: a pair of arm members parallel to each other with a flexible material; A lock cover is integrally formed by a connecting member connecting an arm member at an intermediate portion and formed in an H shape and a lock cover is provided on the inner side surface of the arm member at the distal end side of the lock cover, An engaging portion is provided at an end of the arm member on the base end side of the lock cover to engage with an end edge of the opening portion of the cover And the end portion of the arm member on the proximal end side of the lock cover is pressed in the inward direction to widen the gap between the end portions of the arm member on the distal end side and the handle portion of the handle of the circuit breaker is fitted from both sides, The lock cover is attached to the handle portion of the handle by engaging the protrusion provided on the arm member on the distal end side of the handle with the relief hole of the handle portion and by engaging the engaging portion of the arm member on the base end side with the end edge of the opening portion of the cover, And the handle of the breaker is locked at the circuit opening position or the circuit closing position.

According to the present invention, a locking protrusion is provided on the outer side of the arm member end of the base end side of the lock cover, a coupling recess is provided on the inner wall surface of the opening of the cover, and the lock cover is fixed to the handle of the handle of the circuit breaker The engaging projection of the base end side arm member of the lock cover can be engaged and fixed to the engaging recessed portion of the opening portion of the cover when attached.

Further, in the present invention, a U-shaped lock holder configured to be detachable from the outside of the lock cover is provided, and in a state in which the lock holder is attached to the lock cover, both lock holes provided in the lock cover and the lock holder It is possible to carry out correction by inserting the collar.

According to the present invention, since the lock cover, which is engaged with the handle portion of the circuit breaker and the opening of the cover of the circuit breaker to lock the handle, is formed in an H-shape by connecting two parallel arm members at the intermediate portion, Even if the thickness of the arm member formed of the flexible material is increased to increase the rigidity, the gap of the arm member on the distal end side can be relatively easily widened by pushing the end portion of the arm member on the proximal end side, Therefore, mounting on the handle of the lock cover becomes easy. Further, by increasing the rigidity of the lock cover, it becomes difficult to peel off with a little external force in the state of being mounted on the handle, and reliability can be enhanced.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 12 show the structure of a handle lock device of a circuit breaker according to an embodiment of the present invention.

Fig. 1 (a) is a front view thereof, Fig. 1 (b) is a left side view thereof, Fig. 1 (c) is a front view of the handle lock cover (D) is a perspective view of the cc line in Fig.

The lock cover 2 according to the present invention includes a pair of arm members 21A and 21B arranged in parallel with a gap and a connecting member 22 connecting the pair of arm members in the middle, And is molded integrally with a flexible resin. The inner side surfaces of the pair of arm members 21A and 21B which oppose the distal end side arm members 21-1A and 21-1B on the upper side of the connecting member 22 are provided with knobs A pair of coupling protrusions 23A and 23B are provided. The guide grooves 24A and 24B are provided on the outer side surfaces of the distal end side arm members 21-1A and 21-1B. Each of the arm members 21-2A and 21-2B is provided at its outer side with a pair of engaging projections 25A and 25B for engaging with engaging recesses provided in the inner wall of the opening of the cover of the circuit breaker described later, The base end side arm member 21-2A is provided with keyholes 26-1 and 26-2 for passing two locks (refer to FIG. 1 (b)), and the base end side arm member 21-2A (See Figs. 1 (c) and 2 (d)). The hooking grooves 27-1 and 27-2 are for binding a string of a mark to be displayed for display when the handle is locked. The lower ends of the arm members 21-2A and 21-2B on the proximal end side are formed with engaging portions 28A and 28B which engage with the edge of the opening 13 of the cover of the circuit breaker described later.

Fig. 2 shows the state in which the lock cover 2 shown in Fig. 1 is reversed upside down so as to be viewed from the back side. Fig. 2 (a) is a rear view and Fig. 2 (b) is a perspective view.

"0N" indicating that the circuit breaker is locked in the ON state is displayed on the front side of the lock cover 2 (refer to FIG. 1 (a)), and "0FF" indicating that the circuit breaker is locked in the OFF state (See Fig. 2 (a)).

Fig. 3 is a perspective view showing a configuration of the lock holder 3 used with the lock cover 2. Fig. The lock holder 3 is formed in an inverted U-shape by connecting the upper ends of the two side pieces 31A and 31B with the upper piece 32. [ The lower ends of the front surfaces of the side pieces 31A and 31B are connected by the connecting pieces 33 so that the lower ends of both side pieces are prevented from being widened. The opposite sides 31A and 31B are provided with guide grooves 34A and 34B penetrating the guide grooves 34A and 34B to be engaged with the guide convex troughs of the lock cover 2 and the side pieces 31B And keyholes 36-1 and 36-2 are provided at positions opposed to the keyholes 26-1 and 26-2 provided on the base end side arm member 21-2B of the lock cover 2. [

4 is a partially enlarged perspective view of the opening 13 of the cover 12 protruding from the handle portion of the operation handle of the circuit breaker. In this figure, the illustration of the handle is omitted. The opening 12 of the opening 13 protruding from the handle portion 18 (not shown in Fig. 4) of the handle of the operation handle is attached to the cover 12, which is covered with the case 11, The inner side wall surfaces 13A and 13B are provided with coupling concave portions 15A and 15B (here, only 15B is shown) for engaging with the coupling projections 25A and 25B provided on the lock cover 2.

As shown in Fig. 1 (c), a plurality of protrusions 23A and 23B are provided because, even when the handle portion 18 of the handle is directed in any direction in the up-and-down direction in the circuit- So that the projections 23A and 23B fit properly.

Next, a method of locking the handle of the operation of the circuit breaker using the lock cover 2 and the lock holder 3 configured as described above will be described.

First, Figs. 5 to 8 illustrate the locking process in the ON state of the circuit breaker.

5, the handle 12 is connected to the handle for opening / closing operation projected from the opening 13 of the cover 12, which is covered on the case 11 in which the opening and closing mechanism and the handle (not shown) (18) is inclined upward to the upper side in the ON state of the circuit breaker (1).

In order to attach the lock cover 2 to the grip portion 18 placed at this position, as shown in FIG. 5 (b), the front face (the face marked 0N) of the lock cover 2 is set as the front side, The lower ends of the arm members 21-2A and 21-2B are fitted with fingers and pressed from the outside to the inside as shown by the arrows. As a result, the base end side arm members 21-2A and 21-2B are displaced as shown by the dotted line, and accordingly, the distal end side arm members 21-2A and 21-2B integral with the base end side arm members 21-2A and 21-2B, (21-1A, 21-1B) are displaced as shown by the dotted line, and the interval between the tips is widened.

The distal end side arm members 21-1A and 21-1B with the wider spacing are pressed into the side of the handle portion 18 and the circuit breaker 1 The grip portion 18 of the grip portion 18 is inserted from the outside. When the base end side arm members 21-2A and 21-2B are released from the pressing position, the distal end side arm members 21-1A and 21-1B are moved from their both sides to the original position And the protrusions 23A and 23B of the side surface are fitted into the relief holes 18a of the handle portion 18 and the lock cover 2 is held by the handle 22. [ (18). ≪ / RTI > By engaging the engaging portions at the lower ends of the base end side arm members 21-2A and 21-2B of the lock cover 2 with the lower end edge of the opening portion 13 of the cover 12 of the circuit breaker, Is attached to the cover 12 and the handle portion 18 of the circuit breaker as shown in Fig. 6 (a).

Since the lock cover 2 is supported by the handle portion 18 and the opening portion 13 of the cover 12 when the lock cover 2 is engaged with the handle portion 18 in this manner, The handle portion 18 is firmly locked in the ON position by the lock cover 2 and can not be tilted so that the handle portion 18 is prevented from being tilted inadvertently even if the user tries to move the handle portion 18 downward .

6 (b) shows the circuit breaker in a state in which the lock cover 2 is attached to the circuit breaker 1, One protrusion 23A of the member is engaged with the relief hole 18a of the handle portion 18 and another protrusion 23A is joined to the upper surface of the handle portion 18 and the distal end side arm member 21 -1A and 21-1B are engaged with the grip portion 18 at two points, the coupling force between the lock cover 2 and the grip portion 18 is increased.

Further, the lock cover 2 has a thicker thickness of the arm member 21 than the conventional one, thereby increasing its rigidity. As a result, the lock cover 2 coupled to the handle portion 18 can be prevented from being peeled off from the handle portion 18 even if a small external force is applied due to its high rigidity, and the risk of inadvertent peeling can be reduced The reliability of the handle lock can be increased. 5 (b), the proximal end side arm members 21-2A and 21-2B can be prevented from being deformed even if the rigidity of the lock cover 2 is increased. The end portions of the distal end side arm members 21-1A and 21-1B can be displaced to the opposite side simply by pushing the end portions of the lock cover 2 to be easily attached to the handle portion 18 of the lock cover 2. [

According to the present invention, as shown in Fig. 6 (a), the operation handle of the circuit breaker can be sufficiently locked only by mounting the lock cover 2 on the handle portion 18. However, Since the lock cover 2 can be removed by applying a large external force, there is a risk that the lock is peeled off.

When the lock is completely performed, as shown in Fig. 7, the lock holder 2 mounted on the handle portion 18 is inspected from above and the lock holder 3 is pushed to the position shown in Fig. 8 . Thus, since the outer side of the lock cover 2 is completely covered by the lock holder 3, the lock cover 2 is protected from the external force, and reliability is further enhanced. 8, the keyhole 36-2 on the lower side of the lock holder 3 and the keyhole 36-2 of the lock cover 2 in the position facing the keyhole 36-2, And the ring 61 of the lock 6 is inserted into the groove 26-2 so as to communicate therewith.

The method of locking the handle of the operation in the off state of the circuit breaker is basically the same as the locking method in the on state as shown in Figs. 9 to 12.

The handle portion 18 associated with the handle is tilted downward in the opening portion 13 of the cover 12 as shown in Fig. 9 (a) when the circuit breaker 1 is in the off state. When the lock cover 2 is mounted on the handle portion 18, the direction of the lock cover 2 is rotated 180 degrees in the vertical direction from the direction in the on-state shown in Fig. 5, (b), the display surface of "0FF" is directed toward the table side.

The end portions of the proximal end side arm members 21-2A and 21-2B of the lock cover 2 are pressed inward so that the distal end side arm members 21-1A and 21-2 -1B is widened at the distal end of the handle 18 and is attached to the handle 18 from the outside as shown by the dotted arrow in Fig. 9 (a) .

10, when the lock cover 2 is attached to the handle portion 18 in such a manner, the lock cover 2 attached to the circuit breaker 1 is fitted to the distal end side arm members 21-1A and 21 One of the projections 23A and 23B provided on the inner side of the grip portion 18 is engaged with the relief hole 18a of the grip portion 18 and is engaged with the grip portion 18. [ Since the engaging portions at the distal ends of the base end side arm members 21-2A and 21-2B of the lock cover 2 are engaged with the end recesses of the opening portion 13 of the cover 12 of the circuit breaker 1, The lock cover (2) is tightly coupled to the handle (18). In the case where the engaging projections 25A and 24B are provided on the outer side surfaces of the base end side arm members 21-2A and 21-2B as well as in the inner side of the opening 13 of the cover 12 shown in Fig. It can be combined with the engaging concave portions 15A and 15B provided on the side wall, thereby further increasing the engaging force.

As described above, when the circuit breaker in the off state mounts the lock cover 2 on the handle portion 18, the handle portion 18 is prevented from being tilted upward by the lock cover 2, It is possible to lock the handle of the lock lever in the off state.

11, in order to prevent the lock cover 2 from being peeled off from the handle portion 18 even if a large external force is applied to the lock cover 2 inadvertently, the lock holder 3 is pulled out from the outside of the lock cover 2 It can be felt. The method of touch-up is the same as the case of the above-described ON state.

As shown in Fig. 12, the keyhole 36-1 on the upper side of the lock holder 3 and the position opposite to the keyhole 36-1 in a position where the lock holder 3 is completely covered with the lock cover 2 The lock 51 of the lock 5 is inserted into the keyhole 26-1 of the invisible lock cover 2 and the lock 51 is locked so that the lock holder 3 can be locked It is not possible to peel off the cover 2, so that it is possible to securely and completely lock the steering handle.

Fig. 1 is a front view, Fig. 2 (b) is a left side view, Fig. 2 (c) is a cross-sectional view taken along the line c-c in Fig.

Fig. 2 shows the lock cover shown in Fig. 1 in an inverted state, wherein (a) is a front view (rear view), and Fig. 2 (b) is a perspective view.

3 is a perspective view showing a configuration of a lock holder used in the present invention.

4 is an enlarged partial perspective view showing an opening of a cover of a circuit breaker to which the present invention is applied.

(A) is a perspective view showing a state before the lock cover is mounted on the circuit breaker, (b) is a perspective view showing a mounting method of the lock cover FIG.

(A) is a perspective view showing a state in which the lock cover is mounted on the circuit breaker, (b) is a perspective view showing a state in which the mounting portion of the lock cover Fig.

7 is an explanatory diagram of a method of mounting a lock holder in an on state according to the present invention.

8 is a perspective view showing a locked state by a lock holder in an on state according to the present invention;

(A) is a perspective view showing a state before the lock cover is mounted on the circuit breaker, (b) is a perspective view showing a mounting method of the lock cover FIG.

(A) is a perspective view showing a state in which a lock cover is mounted on a circuit breaker, (b) is a perspective view showing a state in which the mounting portion of the lock cover Fig.

11 is an explanatory diagram illustrating a method of mounting a lock holder in an off state according to the present invention.

12 is a perspective view showing a locked state by a lock holder in an off state according to the present invention;

13A is a side view, FIG. 13B is a sectional view taken along the line A in FIG. 13A, and FIG. 13C is a side view of the lock cover. 13 is a BB sectional view of (A).

14 is an exploded perspective view when a circuit breaker is locked in a circuit closed state by using a conventional handle lock cover.

15 is a perspective view showing a state in which a circuit breaker is locked in a circuit closed state by a conventional lock cover;

16 is an exploded perspective view of the circuit breaker when the circuit breaker is locked in a circuit open state using a conventional lock cover.

17 is a perspective view showing a state in which a circuit breaker is locked in a circuit open state by a conventional lock cover.

Fig. 18 is a view showing a process when a circuit breaker is locked in a circuit closed state using a conventional lock cover and a lock holder, Fig. 18 (A) shows a state in which the circuit breaker is locked in a circuit closed state (B) is a perspective view showing a state in which the circuit breaker is locked in a circuit closing state.

Fig. 19 is a view showing a process in which a circuit breaker is locked in a circuit-opened state by using a conventional lock cover and a lock holder, Fig. 19A is a perspective view showing a state in which the circuit breaker is locked in a circuit- (B) is a perspective view showing a state in which the circuit breaker is locked in a circuit closed state.

DESCRIPTION OF THE REFERENCE NUMERALS (S)

1: Circuit breaker 2: Lock cover

3: Lock holder 11: Case of circuit breaker

12: cover of circuit breaker 13: opening of cover

18: Handle portion of handle for opening and closing operation

18a: Relief hole of handle

21A, 21B: arm member 22: connecting member

21-1A, 21-1B: distal end side arm member

21-2A, 21-2B: base end side arm member

23A and 23B: projections 24A and 24B:

25A, 25B: engaging projections 26-1, 26-2: keyhole

34A, 34B: guide grooves 36-1, 36-2: keyhole

Claims (3)

In a handle lock device of a circuit breaker, The circuit breaker includes: A case for housing an opening / closing mechanism of the circuit breaker, A cover for covering the case, A handle which has a handle portion having a relief hole formed in a side surface parallel to a surface which rotates at a front end portion protruding through the opening of the cover, And an engaging concave portion provided on an inner wall surface of the opening portion of the cover, Wherein the handle lock device comprises: A lock cover comprising a pair of arm members parallel to each other with an interval formed by a flexible material and a connecting member connecting the pair of arm members at an intermediate portion to form an H- Respectively, The lock cover includes: A protrusion provided on an inner surface of an opposite side of a distal end side arm member of the lock cover, An engaging projection provided on an outer side surface of an end of the arm member on the base end side of the lock cover, And a coupling portion provided at an end of the base end side female member of the lock cover, The distal end portion side arm member is pushed toward the grip portion side of the handle of the circuit breaker by pressing the end portion of the proximal end side arm member of the lock cover inward to widen the gap between the end portions of the distal end side arm member, The front end side arm member is returned to the original position from both sides of the handle portion by pressing the handle portion from both sides and releasing the pressure of the base end side arm member in this state, and the protrusion provided on the distal end side arm member of the lock cover Is engaged with the relief hole of the handle portion to attach the lock cover to the handle portion of the handle and the engaging projection is engaged with the engaging concave portion and the engaging portion of the base end side arm member is engaged with the end edge of the opening portion of the cover The locking of the handle of the circuit breaker to the circuit open position or the circuit closing position Circuit breakers of the handle lock device, characterized in that the. The method according to claim 1, Wherein a U-shaped lock holder configured to be detachable from the outside of the lock cover is provided, and a lock ring is inserted into both keyholes provided in the lock cover and the lock holder in a state where the lock holder is covered with the lock cover Of the circuit breaker. A circuit breaker having a handle lock device for locking a handle of a circuit breaker to a circuit open position or a circuit break position, characterized in that the handle lock device is the handle lock device according to claim 1 or 2.

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