JP5006638B2 - Circuit breaker handle lock device and handle lock system - Google Patents

Description

  The present invention relates to a handle lock device for fixing an operation handle of a circuit breaker that cuts off an electric current when an overcurrent flows, and a handle lock system including the handle lock device.

  Conventionally, a circuit breaker such as a circuit breaker has been used to break an electric circuit when an overcurrent flows through the electric circuit due to a short circuit (short circuit) or excessive use of electricity (overload).

The circuit breaker swings the operation handle from the OFF position to the ON position, and supplies power to the electric circuit by bringing the movable contact into contact with the fixed contact.
Since anyone can easily operate this operation handle, there is a handle lock device that locks (fixes) the operation handle at the OFF position or the ON position so that the operation handle is not operated arbitrarily. The handle lock device includes a lock member that is fitted on the operation handle, and a substantially U-shaped lock pin that locks the lock member to the circuit breaker so that the lock member is not separated from the circuit breaker.

  In the conventional handle lock device, the lock member and the lock pin are separately configured, and the lock member and the lock pin are used in combination at the time of locking. Or it comprised from the two lock members and the lock pin united with one of the two lock members, and was using combining the two lock members and the lock pin at the time of locking. The handle lock device is small enough to be carried by a worker in a pocket of clothes, and if the handle lock device is not configured integrally, the components are easily lost. In particular, the lock pin is easily lost.

Therefore, recent handle lock devices have a structure in which the lock member and the handle lock member are integrated by inserting a lock pin from one end to the center of the slide groove formed in the lock member. (For example, refer to Patent Document 1).
Japanese Patent Application Laid-Open No. 2005-268012

  However, in the configuration of Patent Document 1 described above, since the lock pin is simply inserted through the sliding groove, the lock pin is easily detached from the lock member. Therefore, the lock pin is detached from the lock member when the operator locks the handle lock device in the pocket of the clothes to perform other work, or the lock pin is removed from the lock member when taking out from the pocket. There is a possibility that problems such as falling on the floor will occur.

  An object of the present invention is to provide a handle lock device for a circuit breaker capable of integrally holding a lock member and a lock pin so that the lock pin is not detached from the lock member when the operation handle is not locked, and the handle lock. It is to provide a handle lock system including the device.

  The handle lock device for a circuit breaker according to the present invention includes a lock member and a lock pin. The lock member has a fitting groove that fits in the fitting direction on the operation handle of the circuit breaker that cuts off the overcurrent. The lock pin has a substantially U shape in which both ends engage with the circuit breaker to lock the lock member to the circuit breaker.

Further, the lock member includes an insertion hole through which the lock pin is inserted from one end portion to the center portion, and a slide groove that slidably guides the center portion of the lock pin inserted through the insertion hole in at least the external fitting direction , A communication groove that communicates the insertion hole and the slide groove, and an engagement portion that engages with the central portion of the lock pin at the end of the slide groove on the side of the communication groove . The communication groove is formed in a tapered shape from the insertion hole side to the sliding groove side so that the width of the portion communicating with the sliding groove is shorter than the line width of the lock pin, and at least a portion communicating with the sliding groove The wall surface is formed of an elastic member.

  In this configuration, the lock pin is not inserted through the sliding groove or the engaging portion of the lock member, but is inserted through the insertion hole. In addition, since a part of the communication groove is formed of an elastic member and the groove width is formed to be shorter than the line width of the lock pin, the operator can slide the lock pin from the insertion hole through the communication groove. Alternatively, the elastic member is elastically deformed when moved to the engaging portion. Therefore, since the lock pin once moved to the sliding groove and the engaging portion cannot return to the insertion hole unless a large force acts, it can be prevented from coming off from the lock member.

  Further, the sliding groove has a first groove whose groove direction is parallel to the outer fitting direction of the fitting groove to the operation handle, a groove direction different from the outer fitting direction, one end communicating with the first groove, and the other. And a second groove whose end communicates with the engaging portion. The sum of the lengths of the first groove and the second groove in the outer fitting direction is equal to the outer fitting amount of the fitting groove in the outer fitting direction.

  In this configuration, the central portion of the lock pin slides in the first groove, and then slides in the second groove and is engaged with the engaging portion. In addition, the sum of the lengths of the first groove and the second groove in the outer fitting direction is equal to the outer fitting amount of the fitting groove in the outer fitting direction. The hole can be completely fitted over the operating handle. Further, since the second groove has a groove direction different from that of the first groove, the center portion slides while the lock pin rotates around both ends. By this rotation, it is easy to engage the center portion of the lock pin with the engaging portion.

Further, the engagement portion is located at an end of the communication groove side in the sliding groove, a protruding portion having a resilient projecting toward the one wall surface of the slide groove to the other wall, the other wall width between is provided with a short protrusion than the line width of the locking pin.

  As a result, the lock pin elastically deforms the protrusion and engages with the engaging portion, so that it is possible to prevent the lock pin from being disengaged unless a large force is applied.

The handle lock system according to the present invention includes a handle lock device for a circuit breaker and a circuit breaker, and engages both ends of the lock pin with engagement holes formed in an operation handle of the circuit breaker. The handle lock device for a circuit breaker is the handle lock device for a circuit breaker described above. Circuit breaker, ON position, having a swingably operating handle between the OFF position.

  In this configuration, the lock member and the circuit breaker are locked by engaging both end portions of the lock pin of the handle lock device with the engagement holes formed in the operation handle. Thereby, if it is a one handle type circuit breaker, a handle lock device can be used in common regardless of single pole or multi pole. Single-pole circuit breakers and multi-pole circuit breakers have different housing sizes, so the positions of the engagement holes for engaging the lock pins were different, but the engagement holes were formed in the operation handle. Thus, the same lock pin can be engaged with the engagement hole regardless of the size of the housing.

  According to the handle lock device and the handle lock system for a circuit breaker according to the present invention, the lock pin inserted into the sliding groove and the engaging portion is prevented from being detached from the lock member, and the lock member and the lock pin are integrated. The convenience can be improved. Further, the handle lock device can be commonly used for both a single-pole circuit breaker and a multi-pole circuit breaker. Thereby, convenience can be improved and manufacturing cost can be reduced.

  FIG. 1 is a perspective view and a side sectional view showing a configuration of a handle lock device according to an embodiment of the present invention. FIG. 1A shows a state where the circuit breaker is locked. The handle lock device 1 locks the operation handle 51 of the circuit breaker 50 at a predetermined position so as not to rotate. In this embodiment, the operation handle 51 is locked at the OFF position.

  The circuit breaker 50 retracts the movable contact from the fixed contact when the overcurrent is about to flow between the movable contact (not shown) and the fixed contact (not shown). Cut off. The operation handle 51 is swingable between an ON position and an OFF position, and the movable contact is brought into contact with the fixed contact in the ON position, and the movable contact is moved from the fixed contact in the OFF position. Separate.

  The handle lock device 1 includes a lock pin 10, a lock member 20, a padlock 30, and the like. As shown in FIG. 2A, the lock pin 10 is formed in a substantially U shape with a spring wire, and the insertion hole 22 of the lock member 20 from one end 10B to the center 10A (FIG. 2B). Is inserted. The lock pin 10 locks the lock member 20 to the circuit breaker 50 in a state in which both end portions 10 </ b> B extending are fitted into engagement holes described later formed in the operation handle 51 of the circuit breaker 50.

  The lock member 20 includes a fitting groove 21, an insertion hole 22, a communication groove 23, a sliding groove 24, an engagement portion 25, and the like. The lock member 20 of this embodiment is resin-molded. As shown in FIG. 1A, the fitting groove 21 is externally fitted and fixed to the operation handle 51 in the OFF position. As shown in FIG. 1B, the insertion hole 22 is located at the upper portion of the lock member 20 and is formed so as to open both side surfaces of the lock member 20.

  The lock pin 10 cannot be inserted from the sliding groove 24 and the engaging portion 25. This is because the distance from both end portions 10B of the lock pin 10 to the first bent portion 10C is shorter than the depth of the sliding groove 24 and the engaging portion 25, and the width of the sliding groove 24 and the engaging portion 25 is also wide. Because there is no. When one end portion of the lock pin 10 is inserted into the sliding groove 24 and the engaging portion 25, it is caught by the first bent portion 10C and cannot be inserted any more.

  On the other hand, since the depth of the insertion hole 22 is shorter than the distance from both end portions 10B of the lock pin 10 to the first bent portion 10C, the lock pin 10 can be inserted from the one end portion 10A. Moreover, since the insertion hole 22 has a large opening area, it is easy to insert the lock pin 10.

  2A, U-shaped widths W1 and W2 of the lock pin 10 are longer than the width in the direction of the arrow X shown in FIG. Therefore, the lock member 20 is rotatable around the central portion 10 </ b> A of the lock pin 10.

  The communication groove 23 communicates the insertion hole 22 with the engagement portion 25 and guides the lock pin 10 to the engagement portion 25 and the sliding groove 24. Further, as shown in FIG. 2B, the groove width of the communication groove 23 is such that the cross-sectional shape of the wall surface is tapered, and the groove width on the engagement portion 25 side is shorter than the line width of the lock pin 10. ing. Therefore, when the operator press-fits the lock pin 10 into the communication groove 23, the lock pin 10 moves from the insertion hole 22 to the engagement portion 25 and the slide groove 24 while elastically deforming the wall surface of the communication groove 23.

  As shown in FIG. 1B, the sliding groove 24 is formed in a zigzag shape by grooves 24A, 24B, and 24C formed from the upper side to the lower side, and is formed at the depth of the groove that the both side surfaces of the lock member 20 open. Has been. The groove 24A separates the lock member 20 from the circuit breaker 50 so that the lock member 20 can rotate without being interfered with the circuit breaker 50 when the lock pin 10 is fitted in the engagement hole of the operation handle 51. The lock pin 10 is guided to

  The groove 24B corresponding to the first groove of the present invention communicates with the groove 24A and the groove 24C. Further, as shown in FIG. 1B, the groove 24B is parallel to the arrow Y direction, which is the direction in which the fitting groove 21 is fitted to the operation handle 51, and the lock pin 10 is fitted to the operation handle 51. The central portion 10A is guided to the groove 24C. The groove 24 </ b> C corresponding to the second groove of the present invention guides the central portion 10 </ b> A of the lock pin 10 to the engaging portion 25 after the fitting groove 21 is externally fitted to the operation handle 51. The sum of the lengths of the grooves 24B and 24C in the arrow Y direction is equal to the external fitting amount of the fitting groove 21 in the arrow Y direction. Therefore, the fitting hole 21 can be completely fitted onto the operation handle 51 at the engaging portion 25 where the lock pin 10 has completely slid.

  The engaging portion 25 engages with the central portion 10 </ b> A of the lock pin 10. Thereby, when the operation handle 51 is locked, the lock pin 10 is prevented from sliding and the locking of the lock member 20 to the circuit breaker 50 is released.

  The engaging portion 25 has a protruding portion 25A. The protruding portion 25A protrudes from the wall surface on the one end portion side above the sliding groove 24 toward the opposing wall surface, and divides the engaging portion 25 and the sliding groove 24 from each other. Further, the protrusion 25A is formed such that the width of the wall surface facing the tip of the protrusion 25A is shorter than the line width of the lock pin 10. In addition, the protrusion 25A is elastic because it is molded integrally with the lock member 20. Therefore, the lock pin 10 positioned in the sliding groove 24 is engaged with the engaging portion 25 while the central portion 10A elastically deforms the protruding portion 25A.

  As shown in FIG. 1A, the padlock 30 prevents the locking hook 31 from being inserted into the key hole 26 of the lock member 20 and removed by a person other than the person in charge.

  3 and 4 are explanatory views showing a procedure for locking the operation handle using the handle lock device 1 according to the embodiment of the present invention. First, so that the state shown in FIG. 3 (A) is changed to the state shown in FIG. 3 (B), the operator pinches the lock pin 10 to reduce the distance between the both end portions 10B. It fits in the engagement hole 52 provided in. At this time, the lock member 20 is pre-rotated around the central portion 10A of the lock pin 10 that is slid in the bent portion between the grooves 24B and 24C of the sliding groove 24 so that the bottom portion is positioned upward. . This is because if the lock member 10 is not rotated, the lock pin 20 cannot be clamped as long as the lock member 20 is obstructed and the both end portions 10B can be engaged.

  Next, the lock member 20 is rotated from the state shown in FIG. Thereafter, as shown in FIG. 4C, the lock member 20 is moved in the arrow Y direction so that the fitting hole 21 is completely fitted to the operation handle 51. At this time, the central portion 10A of the lock pin 10 rises on the groove 24B toward the groove 24C as the lock member 10 moves in the arrow Y direction. When the fitting hole 21 is completely fitted on the operation handle 51, the center portion 10A of the lock pin 10 is positioned at the upper end portion of the groove 24B as shown by the dotted line portion in FIG. Yes.

  Thereafter, as shown in FIG. 4D, the lock pin 10 is rotated about both end portions 10 </ b> B, and the central portion 10 </ b> A of the lock pin 10 is engaged with the engaging portion 25. Finally, as shown in FIG. 4E, the lock hook 31 of the padlock 30 is inserted into the key hole 26 of the lock member 20 to lock the key. In this state, since the central portion 10A of the lock pin 10 is located between the U-shaped locking hooks 31, the lock pin 10 is used for locking even if the operator tries to move the locking member 20 upward. The hook 31 is caught and the movement of the lock member 20 is restricted. Therefore, the operation handle 51 cannot be unlocked unless the padlock 30 is unlocked and the locking hook 31 is removed from the lock member 20.

  As described above, the lock pin 10 inserted through the sliding groove 24 and the engaging portion 25 can be prevented from being detached from the lock member 20, and the lock member 20 and the lock pin 10 can be held integrally. Convenience can be improved.

  In the present embodiment, the configuration for locking the operation handle 51 of the single-pole one-handle type circuit breaker 50 has been described. However, the handle lock device 1 of the present invention has a multi-pole one-handle type as shown in FIG. The operation handle of the circuit breaker 60 can also be locked in place.

  The circuit breaker 60 shown in FIG. 5 is a two-pole type, and when a single operation handle 61 is turned ON / OFF, a two-pole movable contact (not shown) is brought into contact with a fixed contact (not shown). I do. The operation handle 61 has an engagement hole 62 at the center. Since the engagement holes 62 have the same spacing and shape as the engagement holes 51 formed in the operation handle 51 of the circuit breaker 50 having a single pole, the operation handle 61 is moved to the OFF position using the handle lock device 1 described above. It can be locked with. The locking procedure is the same as the locking procedure of the operation handle 51.

  As described above, the handle lock device 1 is made of a single pole by the handle lock system including the circuit breakers 50 and 60 and the handle lock device 1 by forming the engagement holes 52 and 62 having the same shape in the operation handles 51 and 61. The circuit breaker 50 and the multi-pole circuit breaker 60 can be used in common. Thereby, convenience can be improved and manufacturing cost can be reduced.

  In this embodiment, since the lock member 20 is molded of resin, it has elasticity as a whole, but it is not necessary to form it with a member having elasticity, and the groove width of the communication groove 23 is the line width of the lock pin 10. It is only necessary that the shorter wall surface and the protruding portion 25A be formed to have elasticity.

It is the perspective view and side sectional drawing which show the structure of the handle | steering-wheel locking apparatus which concerns on embodiment of this invention. It is a perspective view which shows the structure of the lock pin with which the handle | steering-wheel lock apparatus was equipped. It is explanatory drawing which shows the procedure which locks an operation handle using the handle | steering-wheel locking apparatus. It is explanatory drawing which shows the procedure which locks an operation handle using the handle | steering-wheel locking apparatus. It is a perspective view which shows the structure of the circuit breaker of a multipolar one handle type.

Explanation of symbols

1-handle lock device 10-lock pin 20-lock member 21-fitting hole 22-insertion hole 23-communication groove 24-sliding groove 25-engaging portion 50, 60-circuit breaker 51, 61-operation handle 52 62-engagement holes

Claims (4)

The operation handle of the circuit breaker that cuts off the overcurrent, a lock member having a fitting groove that fits in the fitting direction, and both ends engage with the circuit breaker so that the lock member becomes the circuit breaker. In a handle lock device provided with a substantially U-shaped lock pin to be locked,
The lock member has a through hole through which the lock pin is inserted from one end portion to a central portion, and a sliding guide that slidably guides the central portion of the lock pin inserted through the insertion hole in at least the external fitting direction. includes a groove, the front Symbol insertion hole and the sliding groove and communicating groove that communicates the, the, the engaging portion which engages the central portion of the lock pin in an end portion of the communicating groove side in the sliding groove ,
The communication groove is formed in a tapered shape from the insertion hole side toward the sliding groove side so that a width of a portion communicating with the sliding groove is shorter than a line width of the lock pin, and at least the sliding groove is formed. A handle lock device for a circuit breaker, wherein a wall surface of a portion communicating with the moving groove is formed of an elastic member. The sliding groove is a first groove whose groove direction is parallel to an outer fitting direction of the fitting groove to the operation handle, and a groove direction different from the outer fitting direction, and one end communicates with the first groove. And a second groove whose other end communicates with the engaging portion,
2. The circuit breaker according to claim 1, wherein a sum of lengths of the first groove and the second groove in the external fitting direction is equal to an external fitting amount of the fitting groove in the external fitting direction. Handle lock device. The engaging portion, the located end of the communicating groove side, a protruding portion having a resilient projecting toward the one wall surface of the slide groove to the other wall in said sliding groove, the other The handle lock device for a circuit breaker according to claim 1 or 2, further comprising a protrusion having a width between the wall and the wall of the circuit breaker shorter than a line width of the lock pin. The circuit breaker handle lock device according to any one of claims 1 to 3,
Wherein the ON position, the circuit breaker having a swingably operating handle between the OFF position, and
A handle lock system, wherein both ends of the lock pin are engaged with engagement holes formed in an operation handle of the circuit breaker.

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