JPH0511269U - Circuit breaker handle lock device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a highly reliable handlebar lock device for a circuit breaker, which enables the lock cover to be attached with one touch and locks the handle securely. [Structure] A recess 6 is provided in each of 1a and 1b of a substantially prismatic handle 1 which opens and closes an electric path by projecting it out of a case 2 and rotating it to the left and right, and a lock cover 7 is provided on the handle 1. A lock portion 7a having a lock surface having an angle θ equal to the lock angle θ, a side plate portion 7b extending from the lock portion 7a to the side surface 1a of the handle 1, and a side surface of the recess 6 protruding from the side plate portion 7b. A protrusion 7c which is inserted and fitted from the side 1a and a side portion of the lock portion 7a opposite to the side plate portion 7b are provided so as to be locked to the other side surface 1b of the handle 1 at the final insertion position from the side surface 1a side. It is composed of a hook 7d.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a handlebar lock device for a circuit breaker, which locks a handlebar protruding outside a case to prevent opening and closing of a circuit.

[0002]

[Prior Art]

 In the case of the circuit breaker or the earth leakage circuit breaker, the handle 1 supported by the fulcrum is projected to the outside from the opening 2a of the case 2 for accommodating the circuit breaker as shown in FIG. In general, the opening / closing operation is performed by making a rotational movement until it comes into contact with the peripheral edge of the opening 2a. However, since this handle 1 can be freely touched by a person and it is dangerous if it is operated accidentally, a lock cover 3 as shown in FIG. 7 is conventionally mounted in order to prevent the handle 1 from being operated carelessly. In FIG. 7, the lock cover 3 is composed of a cap portion 4 having a substantially prismatic hole and a support portion 5 provided on the side wall of the cap portion 4, and the hole wall of the cap portion 4 is gentle in the direction of the hole. A protrusion 4a having a slope is provided. A notch 5a is provided at the tip of the supporting portion 5. In such a lock cover 3, the cap portion 4 is fitted on the outer periphery of the handle 1 as shown in FIG. 8, and the notch 5a is locked to the peripheral edge of the opening 2a. Then, the handle 1 is no longer able to rotate because it is locked by the support portion 5. When the cap portion 4 is fitted on the outer periphery of the handle 1, the protrusion 4a resists and the handle 1 is in a press-fitted state, and the lock cover 3 cannot be pulled out excessively. The lock cover 3 has the notch 5a locked to the right peripheral edge of the opening 2a when the handle 1 is rotated leftward, and is locked to the left peripheral edge when the handle 1 is rotated rightward. Is installed. Therefore, the circuit breaker can lock the handle 1 while the circuit breaker is open or closed.

[0003]

[Problems to be solved by the device]

 In the conventional circuit breaker hand lock device as described above, since the lock cover 3 is only held by the handle 1 by the friction between the protrusion 4a of the cap portion 4 and the handle 1, the height of the protrusion 4a is high. It is difficult to determine the depth, and the effect of holding due to repeated attachment and detachment decreases, and the lock cover 3 falls off or is easily removed, which defeats the purpose of the lock cover 3. .. For this reason, there is a method in which a horizontal hole is provided at the tip of the handle 1 and a padlock or the like is inserted into this hole to lock it, but there is a disadvantage in that the key is inconvenient to handle and expensive. Further, when the lock cover 3 is removed from the handle 1, the cap portion 4 tends to be pressed in, so if the lock cover 3 is forcibly pulled, there is a risk that the handle 1 may be rotated accidentally and cause a malfunction.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a highly reliable hand-lock device for a circuit breaker in which the lock cover can be attached with one touch and the handle can be reliably locked. And

[0005]

[Means for Solving the Problems]

 The hand-lock device for a circuit breaker according to the present invention is provided with recesses on both side surfaces of the handle, and the lock cover has a lock portion having a lock surface having an angle equal to the handle lock angle, and the lock portion has one of the handles. A side plate portion extending to the side surface side, a protrusion protruding from the side plate portion and being inserted and fitted into the recess from the one side surface side, and a protrusion provided on a side portion of the lock portion opposite to the side plate portion. And a hook that locks to the other side surface of the handle at the final insertion position from the one side surface side.

[0006]

[Action]

 In this invention, when the lock cover is fitted from one side of the handle, the protrusion fits into the recess and the hook engages with the other side of the handle to snap the lock cover, so that the handle is locked. It is locked by the lock part of.

[0007]

【Example】

 An embodiment of this invention will be described with reference to FIGS. 1 is a side view showing a state in which the handle is attached, FIG. 2 is a perspective view showing a state before being attached to the handle, FIG. 3 is a side view of a lock cover, FIG. 4 is a view of FIG. 3 from above, and FIG. 5 is a view of FIG. 3 seen from below, and the same or corresponding parts as those of the conventional device are designated by the same reference numerals and the description thereof will be omitted. In the figure, 6 is a concave portion provided on each side surface of the handle 1, and two through holes are provided to provide two upper and lower recesses. Reference numeral 7 denotes a lock cover to be mounted on the handle 1. The lock cover 7a has a lock surface having an angle θ equal to the lock angle θ of the handle 1, and a side plate portion 7b extending from the lock portion 7a to the side surface 1a of the handle 1. A projection 7c protruding from the side plate 7b and inserted into the recess 6; and a protrusion 7c protruding from the side of the lock part 7a opposite to the side plate 7b and the other side surface 1b of the handle 1 in the mounted state. It is configured with a hook 7d that is locked to.

When the lock cover 7 is fitted from one side surface 1a of the handle 1 as shown by an arrow 8 in FIG. 2, the projection 7c fits into the recess 6 and the hook 7d snaps to the other side surface 1b of the handle 1. Since the lock cover 7 is engaged and mounted on the handle 1 as shown in FIG. 1, the handle 1 is locked by the lock portion 7 a of the lock cover 7. As described above, since the lock cover 7 is attached or detached in the direction perpendicular to the turning direction of the handle 1, there is no risk that the handle 1 is erroneously operated especially when detaching. When the handle 1 is on the opposite side (on the right side in FIGS. 1 and 2), the handle 1 can be locked by mounting the lock cover 7 from the other side surface 1b of the handle 1 as in the case described above. Therefore, the recess 6 of the handle 1 is provided on both side surfaces 1a, 1b of the handle 1, and in this case, the recess 6 is formed by through holes, so that the recess 6 can be easily manufactured.

Further, if the recess 6 of the handle 1 is of two types, that is, the square shape and the round shape as in the above-described embodiment, and the cross-sectional area of the protrusion 7c is matched to the square shape and the round shape, the lock cover 7 with respect to the handle 1 is formed. The rotation is eliminated and the mounting is stable. Further, if one side plate portion 7b is provided for the lock portion 7a as in the above embodiment, the lock cover 7 is housed inside the opening dimension 10 of the panel 9 as shown in FIG.

[0010]

[Effect of the device]

 As described above, according to the present invention, the lock cover can be attached with one touch, and the handle can be reliably locked with high reliability.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention in a locked state.

FIG. 2 is a perspective view showing a state before locking.

FIG. 3 is a side view of a lock cover.

FIG. 4 is a view of FIG. 3 seen from above.

FIG. 5 is a view of FIG. 3 seen from below.

FIG. 6 is a perspective view of a handle portion of a circuit breaker showing a conventional one.

FIG. 7 is a cross-sectional view showing a conventional lock cover.

FIG. 8 is a perspective view showing a locked state.

[Explanation of symbols]

 1 Handle 1a One side of handle 1b Other side of handle 2 Breaker case 6 Recess 7 Lock cover 7a Lock part of lock cover 7b Side plate of lock cover 7c Lock cover protrusion 7d Lock cover hook

Claims (1)

[Scope of utility model registration request] 1. A circuit breaker in which a lock cover is attached to a substantially prismatic handle that opens and closes an electric path by projecting it out of the case and rotating it to the left and right to lock the rotation of the handle. In the handle lock device, concave portions are provided on both side surfaces of the handle, and the lock cover is provided with a lock portion having a lock surface having an angle equal to a lock angle of the handle, and one side surface side of the handle from the lock portion. An extending side plate portion, a protrusion projecting into the side plate portion and inserted and fitted into the recess from the one side surface side, and a protrusion provided on a side portion of the lock portion opposite to the side plate portion and the one side surface side. And a hook that is locked to the other side surface of the handle at the final insertion position from the handle.