JP2001307577A - Handle lock device for circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow locking a handle at both on and off positions with one type of lock member and to deal with such type of circuit breakers that are stably held at parallel position to protrusions of handle. SOLUTION: An opening hole 3 and a locking part 5 are provided to a housing 2 accommodating a circuit breaker main body. A first thrusting point 9 is mounted on a lock member 6 to thrust a handle 4 to a first position P1 in a state of fastening the lock member 6 on the locking part 5 and with the handle 4 at the first position P1. A second thrusting point 10 is mounted on the lock member 6 to thrust the handle 4 to a second position P2 in a state of fastening the lock member 6 on the locking part 5 and with the handle 4 at the second position P2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle lock device for a circuit breaker, and more particularly to a technique for locking a handle at both an ON position and an OFF position.

[0002]

2. Description of the Related Art A handle lock device for a circuit breaker disclosed in, for example, Japanese Patent Application Laid-Open No. 7-220609 is known. In this type of circuit breaker, an opening in which a handle is attached is provided in a housing in which the circuit breaker main body is housed, and a frame-shaped protrusion is provided on an outer peripheral side of the opening. A handle for turning on and off the contact is rotatable between two different positions (an on position and an off position) protruding from the protrusion.
Then, with the handle in either the ON position or the OFF position, the tubular portion of the handle lock including the tubular portion and the locking portion is inserted into the handle portion of the handle, and the locking piece is engaged with the end surface of the opening. By stopping the handle, the handle is locked at that position so that the handle cannot be operated.

[0003]

However, in a conventional handle lock having only a cylindrical portion and a locking piece as in the prior art, a handle for projecting at a predetermined angle from a projection is locked at that angle. For example, in a circuit breaker of a type in which a handle is stably held at a position substantially parallel to a protrusion, a conventional handle lock cannot be used, and such a circuit breaker cannot be used. There was a problem that it could not be handled. In addition, the conventional handle lock can lock the handle only at one of the ON position and the OFF position, and when the handle is to be locked at both the ON position and the OFF position, the two different shapes are used. There has been a problem that different types of handle locks have to be prepared, and as a result, the types of handle locks increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object the purpose of locking the handle at both the ON position and the OFF position with one kind of locking member. Another object of the present invention is to provide a handle lock device for a circuit breaker adapted to a type in which the handle is stably held at a position substantially parallel to the projection.

[0005]

According to the present invention, in order to solve the above-mentioned problem, the handle 4 is moved from the first position P1 to the housing 2 in which the circuit breaker main body is housed. 2 is provided with an opening 3 rotatably attached to a position P2 and a locking portion 5 to which a locking member 6 is removably locked.
When the handle 4 is in the first position P1 while the handle 4 is in the first position P1 while the
The first pressing portion 9 for pressing the lock member 6 with the locking member 5 with the locking portion 5 and the handle 4
When the handle 4 is in the second position P
And a second pressing portion 10 for pressing toward the second member 2. With such a configuration, only by attaching the lock member 6 to the locking portion 5 of the housing 2, When the handle 4 is at the first position P1 substantially parallel to the projection 11, the first pressing portion 9 of the lock member 6 disables the turning operation to the second position P2. Is in the second position P2 protruding from the projection 11, the second pressing portion 10 disables the turning operation to the first position P1. The circuit breaker 1 of the type that is stably held at the parallel first position P1 can be sufficiently coped with, and the handle 4 can be moved to the first position P1 or the second position as required by one kind of locking member 6. In each of the locks in P2 It becomes so that.

A frame-like projection 11 is provided on the outer peripheral side of the opening 3 of the housing 2, and the handle 4 projects at a first position P 1 substantially parallel to the projection 11 and beyond the projection 11. And the outer surface 15 of the handle 4 is substantially flush with the upper edge 12 of the projection 11 when the handle 4 is at the first position P1. Further, a gap 19 is provided between the tip 16 of the handle 4 and the end wall 14 of the projection 11 opposed thereto, and the lock member 6 is detachably attached to the side wall 13 of the projection 11 opposed to the gap 19. Preferably, a locking portion 5 for locking is provided. In this case, when the handle 4 is at the first position, the second pressing portion 10 of the lock member 6 abuts on the outer surface 15 of the handle 4. The lock can be locked in the locked state, simplifying the shape of the lock member 6. Can, also even if an external force is applied to the locking member 6, will form the external force is received by the projecting portion 11, it can be firmly attached to the locking member 6 on the circuit breaker 1. In addition, even when the handle 4 is at the first position P1 in which the handle 4 is tilted in a direction substantially parallel to the projection 11, the lock member 6 is securely engaged with the locking portion 5 without being hindered by the handle 4. The locking portion 5 can be
By providing the locking portion 5 on the side wall 13 of the
Can be prevented from protruding outside.

A display section 20 for displaying the rated capacity of the circuit breaker body is provided in a gap 19 between the tip 16 of the handle 4 and the end wall 14 of the projection 11 opposed thereto. Preferably, the lock member 6 is provided with a window 21 at a position facing the display section 20 in a state where the lock member 6 is locked to the locking portion 5. In this case, it is preferable to remove the lock member 6. In addition, the rated capacity of the circuit breaker main body can be visually recognized from the outside through the window 21.

The locking portion 5 has a pair of left and right hooking grooves 22 on which hooking pieces 23 provided on the lock member 6 are hooked.
Preferably, in this case, attachment and detachment of the lock member 6 can be easily performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

The circuit breaker 1 according to the present embodiment has a circuit breaker body (not shown) having an opening / closing mechanism in a substantially box-shaped housing 2 formed of a molding material such as a synthetic resin.
A handle 4 for turning on / off the opening / closing mechanism is rotatably mounted in an opening 3 provided in the housing 2.

As shown in FIG. 1, left and right side walls 13 and front and rear end walls 1 are provided on the outer peripheral side of the opening 3 of the housing 2.
4, and a substantially square frame-shaped projection 11 having a projection is provided.
The handle 4 is provided in the protrusion 11. The handle 4 includes a handle portion 17 formed of a molding material such as a synthetic resin and a driving portion (not shown). The handle portion 17 has a first position P1 substantially parallel to the protrusion 11 and a first position P1. 2 (b)
As shown in the figure, the movable member can be turned upside down between a second position P2 protruding from the protrusion 11. Also, when in the first position P1, as shown in FIG.
5 is arranged substantially flush with the upper end edge 12 of the projection 11.

A gap 19 is provided between the distal end 16 of the handle 4 at the first position P1 and the end wall 14 of the projection 11 facing the tip 16 of the handle 4. A display unit 20 for displaying the rated capacity is provided. The gap 19 is formed inside the projection 11 and in the opening 3.
It is arranged adjacent to. When the handle 4 is erected at the second position P2, the gap 19 widens, but here, the display unit 20 is provided so as to fit within the gap 19 when the handle 4 is tilted to the first position P1. Have been. Furthermore, the left and right side walls 1 of the protrusion 11 facing the gap 19
As shown in FIG. 3, a pair of left and right hooking grooves 22 constituting the locking portion 5 are provided in the three portions.

On the other hand, when the lock member 6 is locked to the housing 2 and the handle 4 is
Is provided with a first pressing portion 9 for pressing the handle 4 toward the first position P1 when the lock member 6 is locked to the housing 2. And when the handle 4 is at the second position P2,
A second pressing portion 10 for pressing the handle 4 toward the second position P2 is provided. Here, FIG.
A first pressing portion 9 is formed by one half of the rectangular flat plate portion 7 shown in FIG. 1, and a second pressing portion 10 is formed by one edge 8 of the flat plate portion 7. A window 21 and a hook 23 are provided on the other half of the flat plate 7. Window 2
Reference numeral 1 denotes a rectangular opening, which is provided at a position facing the display section 20 provided in the gap 19 of the housing 2 in a state where the lock member 6 is locked to the housing 2, and which is displayed through the window 21. The part 20 can be seen through from the outside. When the window 21 is formed in an opening shape, it is preferable that the size is set to a size that does not allow a human finger to enter. In addition, the window 21 is not limited to the opening shape, and may be formed of, for example, a transparent plastic plate.

A pair of left and right hooking pieces 23 each having a hook-like tip are provided on both left and right sides of the window 21. The hook piece 23 is detachably engaged with a hook groove 22 provided in the side wall 13 of the protrusion 11 of the housing 2, and pulls the hook piece 23 into the hook groove 22. The locking member 6 is locked by the housing 2 by being hooked, and the handle 4 is moved to the first position P1 or the second position P by either the first pressing portion 9 or the second pressing portion 10.
2 (on position or off position).

When the handle 4 is at the second position P2 protruding from the projection 11 as shown in FIGS. 2B and 5, the hook 23 of the lock member 6 is pulled out of the housing 2. Locking the locking member 6 by locking the locking groove 22
The second pressing portion 10 provided on the inner surface 15 of the housing 2
a, whereby the handle 4 is moved to the second pressing portion 10
To be locked, and the rotation operation to the first position P1 is disabled. On the other hand, when the handle 4 is at the first position P1 substantially parallel to the protrusion 11 as shown in FIGS. 2A and 4, the hook 23 of the lock member 6 is moved to the housing as shown in FIG. 2, the first pressing portion 9 provided on the lock member 6 hits the outer side surface 15 of the housing 2, whereby the handle 4 is pushed to the first position P1 and locked. As a result, the rotation operation to the second position P2 becomes impossible. Therefore, the circuit breaker 1 of the type in which the handle 4 is stably held at the first position P1 substantially parallel to the projection 11 can be used. In addition, the handle 4 can be locked at one of the first position P1 and the second position P2 (on position, off position) with one type of lock member 6 as necessary.
Types can be reduced.

In addition, when the handle 4 is at the first position P1, the outer surface 15 of the handle 4 is substantially flush with the upper edge 12 of the projection 11, so that when the lock member 6 is mounted in this state, The locking portion 6 can be locked while the flat portion 7 constituting the second pressing portion 10 is in contact with the outer side surface 15 of the handle 4 and covers the handle 4, thereby simplifying the shape of the lock member 6. can do. Further, at this time, even if an external force is applied to the lock member 6, the external force is received by the protrusion 11 protruding from the housing 2, so that the external force can be prevented from being applied to the handle 4, and the handle 4 is sufficiently protected. Further, when the flat plate portion 7 is in contact with the outer surface 15 of the handle 4, the flat plate portion 7 is also in contact with the upper edge 12 of the protrusion 11, so that the handle 4 is in the first position P 1, In any of the two positions P2, the flat plate portion 7 is supported by the projecting portion 11, so that the lock member 6 can be firmly attached to the circuit breaker 1.

Furthermore, the handle 4 in the first position P1
A hook groove 22 is provided on each of the left and right side walls 13 of the protrusion 11 so as to face the gap 19 provided on the front side of the front end 16 of the handle 16.
When the lock is made at the position P1, the hook 23 of the lock member 6 can be hooked without being hindered by the handle 4, and at this time, the hook 23 projects outside the projection 11. As a result, the possibility that the lock member 6 comes off accidentally is reduced. Further, since the lock member 6 is attached to the housing 2 by a hooking method, the lock member 6 can be easily attached and detached.

Also, by providing hooking grooves 22 in the left and right side walls 13 of the projection 11, respectively, the handle 4
A gap 19 can be secured between the end 16 of the protruding portion 11 and the end wall 14 of the projection 11 so that a finger can be inserted. The lock member 6 is removed, and the handle 4 is moved from the first position P1 to the second position P.
The operation of the handle 4 is facilitated when the rotary operation is performed in the second direction.
In addition, a display unit 20 for displaying the rated capacity of the circuit breaker body is provided using the gap 19, and the display unit 20 can be seen through a window 21 provided in the lock member 6, so that the lock member 6 is removed. There is also an advantage that the rated capacity of the circuit breaker body can be visually recognized from the outside without the need.

[0019]

As described above, according to the first aspect of the present invention, the housing accommodating the circuit breaker body is provided with:
An opening is provided for the handle to be rotatably mounted between the first position and the second position, and a locking portion is provided for locking the locking member in a detachable manner. The locking member has a locking member. A first pressing portion for pressing the handle toward the first position when the handle is in the first position in a state where the lock member is locked to the locking portion; A second pressing portion for pressing the handle toward the second position when the handle is in the locked position and the handle is in the second position is provided. When the handle is in the first position substantially parallel to the protrusion simply by being attached to the stopper, the first pressing portion of the lock member disables the turning operation to the second position, and Is in the second position protruding beyond the protrusion, Rotation operation to the first position becomes impossible by the pressing portion of the. Therefore, it is possible to sufficiently cope with a circuit breaker of a type in which the handle is stably held at the first position substantially parallel to the protrusion, and furthermore, the handle can be used as needed with one kind of lock member. Locking can be performed at either the first position or the second position, and the number of locking members can be reduced.

According to a second aspect of the present invention, in addition to the effect of the first aspect, a frame-shaped projection is provided on the outer peripheral side of the opening of the housing, and the handle is substantially parallel to the projection. First
And a second position protruding from the projection, and when the handle is in the first position, the outer surface of the handle is substantially flush with the upper edge of the projection. Therefore, when the lock member is attached, the lock can be locked in a state where the second pressing portion of the lock member is in contact with the outer surface of the handle, so that the shape of the lock member can be simplified, and external force is applied to the lock member. Is applied, the external force is received by the projection, and the lock member can be firmly attached to the circuit breaker. Moreover, when the handle is in the first position, a gap is provided between the tip of the handle and the end wall of the projection facing the handle, and the locking member is provided on the side wall of the projection facing the gap. Since the locking portion is provided so that the handle can be detachably attached, a gap can be secured between the tip of the handle and the end wall of the protrusion so that a finger can be inserted. Even if it is in the first position where it has fallen in a parallel direction, the locking member can be securely locked to the locking portion without being hindered by the handle, and the locking portion can be further secured to the side wall portion of the projection. With this arrangement, the locking portion does not protrude to the outside of the protrusion, and the risk of the lock member coming off accidentally is eliminated.

According to a third aspect of the present invention, in addition to the effect of the second aspect, the rated capacity of the circuit breaker main body is provided in the gap between the tip of the handle and the end wall of the projection facing the handle. A display portion for displaying is provided, and the lock member is provided with a window at a position facing the display portion in a state where the lock member is locked to the locking portion. In addition, the rated capacity of the circuit breaker body can be visually recognized from the outside through the window.

According to a fourth aspect of the present invention, in addition to the effect of the second aspect, the locking portion comprises a pair of left and right hooking grooves on which the hooking pieces provided on the lock member are hooked. Of the lock member can be hooked, and attachment and detachment of the lock member can be simplified.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of an embodiment of the present invention.

FIG. 2A is a perspective view showing a state where the handle is locked at a first position, and FIG. 2B is a perspective view showing a state where the handle is locked at a second position.

FIG. 3 shows a locked state of the lock member according to the first embodiment;
FIG. 3A is a sectional view taken along line AA of FIG.

FIG. 4A is a plan view showing a state in which the handle is locked at a first position, and FIG. 4B is a side view.

FIG. 5A is a plan view showing a state in which the handle is locked at a second position, and FIG. 5B is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Housing 3 Opening hole 4 Handle 5 Locking part 6 Lock member 9 1st pressing part 10 2nd pressing part 11 Projection 12 Upper edge 13 Side wall 14 End wall 15 Outer side 16 Tip of handle 19 Gap Reference Signs List 20 display part 21 window part 22 hook groove 23 hook piece P1 first position P2 second position

Continued on the front page (72) Inventor Yoshiya Nakamichi 1048 Kadoma Kadoma, Osaka Pref. Matsushita Electric Works, Ltd. (72) Inventor Tomoyuki Sawada 1048 Odaka Kadoma, Kadoma, Osaka Pref. Inventor Takashi Inatsu 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd. F-term (reference) 5G030 AB03 XX04 5G052 AA28 BB07 LA02 LB10 LC01

Claims (4)

[Claims] An opening in which a handle is rotatably mounted between a first position and a second position in a housing in which a main body of the circuit breaker is housed, and a lock member is detachably locked. And a locking portion is provided.
A first pressing portion for pressing the handle toward the first position when the lock member is locked to the locking portion and the handle is at the first position; and the lock member is locked. And a second pressing portion for pressing the handle toward the second position when the handle is in the second position while being locked to the portion. Circuit breaker handle lock device. 2. A frame-shaped projection is provided on an outer peripheral side of an opening of the housing, and a handle is provided between a first position substantially parallel to the projection and a second position protruding from the projection. When the handle is in the first position, the outer surface of the handle is substantially flush with the upper end edge of the projection, and the tip of the handle and the end wall of the projection facing the same. And a gap is provided between the side walls of the protrusion facing the gap.
2. The handle lock device for a circuit breaker according to claim 1, further comprising a locking portion for locking the locking member in a detachable manner. 3. A display for displaying the rated capacity of the circuit breaker body is provided in a gap between the tip of the handle and the end wall of the projection facing the handle, and the lock member has a lock. The handle lock device for a circuit breaker according to claim 2, wherein a window portion is provided at a position facing the display portion in a state where the member is locked to the locking portion. 4. The handle lock device for a circuit breaker according to claim 2, wherein the locking portion comprises a pair of left and right hook grooves on which hook pieces provided on the lock member are hooked.