JP2015043264A - Handle lock device of circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handle lock device of circuit breaker with which a locker type open-close operation handle is set at an off position when a padlock is locked, so that the handle cannot be removed.SOLUTION: A handle lock device of circuit breaker comprises: a metal frame member 10 fixed on a cover 4b with a screw 9b; a slider 11 partially inserted into a slit 10a1 formed on the frame member, engaging with a knob part 8so as to slide within the slit along with a motion of the knob part between an on position and an off position; a lock member 13 rotatably connected to the frame member, and holding the knob part at the off position and rotating so as to cover a top of the screw fixing the frame member on the cover when the knob part moves to the off position; and a lock hole 10b1 provided on the frame member and preventing the lock member from being rotated when a padlock 3 is locked.

Description

  The present invention relates to a circuit breaker handle lock device applied as an external accessory device for a circuit breaker for wiring, a circuit breaker, and the like.

Circuit breakers such as wiring breakers and earth leakage breakers are equipped with a rocker-type opening / closing operation handle that manually opens and closes the main circuit contacts, and this circuit breaker is used on switchboards and operation panels. In order to prevent accidents by restricting inadvertent handle misoperation by outsiders, a handle lock device (for example, the device of Patent Document 1) that cannot be operated is an external accessory device (optional product). ).
In the handle lock device of Patent Document 1, a lock cover mounting plate is fixed so as to surround a rocker-type opening / closing operation handle of a circuit breaker, and a translucent lock cover having an open bottom is attached to the lock cover mounting plate. By fixing, the handle position can be visually judged while making the handle operation impossible.

The lock cover has a counterbore hole for attachment, and a locking projection is formed near the upper opening of the counterbore hole for attachment. Moreover, the lower part of the counterbore hole for attachment respond | corresponds to the lock | rock female screw currently formed in the lock cover attachment plate. Then, the lock cover is fixed to the lock cover mounting plate by screwing the mounting screw inserted into the mounting counterbore hole into the lock female screw. Also, by inserting a crane (U 杆) through the locking hole formed in the locking projection and hooking the padlock, the top of the mounting counterbore hole is closed with a padlock, and the mounting screw in the mounting counterbore hole can be loosened. The lock cover cannot be removed from the lock cover mounting plate.
As described above, the handle lock device of Patent Document 1 has a structure in which the handle lock device cannot be removed from the circuit breaker when the padlock is applied.

JP-A-11-54018

By the way, in recent years, in order to prevent the handle of the circuit breaker from being accidentally put into the ON position (position where the main circuit contact is closed) from the OFF position (position where the main circuit contact is opened). There is an increasing demand and demand for a handle lock device that locks the handle at the OFF position. However, the above-described device of Patent Document 1 has a structure in which a lock cover mounting plate is fixed so as to surround the handle, and the handle cannot be locked in the OFF position.
Therefore, the present invention has an object to provide a circuit breaker handle lock device that can lock a locker-type opening / closing operation handle in an OFF position and prevent removal from the circuit breaker when a padlock is applied. It is said.

In order to achieve the above object, a circuit breaker handle lock device according to one aspect of the present invention locks a knob portion of a rocker-type opening / closing operation handle protruding upward from a cover of a circuit breaker to an OFF position. A handle lock device, a metal frame member fixed to the upper part of the cover, and a slit inserted into the slit formed in the frame member and engaged with the knob part to turn the knob part on And a slider that slides in the slit along with the movement of the OFF position, and is pivotally connected to the frame member, and when the knob is moved to the OFF position, the knob is restrained to the OFF position; and A lock member that rotates so as to cover a head of a screw that fixes the frame member to the cover, and a lock member that is provided on the frame member and that is locked with a padlock. It is characterized by comprising a locking hole to prevent rotation of the member.
According to the handle lock device for a circuit breaker according to one aspect of the present invention, when the padlock is applied, the rotated lock member locks the knob portion of the handle in the OFF position, and the screw that fixes the frame member to the cover Covering the head of the device prevents it from being removed from the circuit breaker.

In the handle lock device for a circuit breaker according to one aspect of the present invention, the lock member has a rotating shaft extending in a direction along the upper surface of the cover and is open to the outside of the cover. The lock member is rotatable about the rotation axis until it falls to the upper part, and when the lock member falls to the upper part of the cover, the knob part is turned off by surrounding a part of the slider from the upper part. A lock recess that is constrained to a position and a screw closing portion that covers the head of the screw are provided.
According to the handle lock device for a circuit breaker according to one aspect of the present invention, with a simple configuration of the lock member, the knob portion is constrained to the OFF position, and the screw head is covered so that it cannot be removed. it can.

In the handle lock device for a circuit breaker according to one aspect of the present invention, the lock member can be kept in a standing state by engagement with the frame member.
According to the handlebar lock device for a circuit breaker according to one aspect of the present invention, the operation of locking the knob portion of the handle to the OFF position can be easily performed even with a narrow work base.
In the circuit breaker handle lock device according to one aspect of the present invention, the frame member is an attachment in which the frame member is integrally assembled with the cover and the main body case of the circuit breaker provided with a base disposed under the cover. It is fixed to the upper part of the cover by screws.
According to the handle lock device for a circuit breaker according to one aspect of the present invention, the operation of attaching the handle lock device to the circuit breaker can be easily performed.
Furthermore, in the handle lock device for a circuit breaker according to one aspect of the present invention, the lock member is made of synthetic resin.
According to the handle lock device for a circuit breaker according to one aspect of the present invention, even if the lock member has a complicated shape, it can be easily manufactured and can be reduced in weight.

  According to the handlebar lock device for a circuit breaker according to the present invention, when the padlock is applied, the rotated lock member can lock the knob portion of the handle to the OFF position, and the frame member is fixed to the cover. It is possible to prevent the screw from being removed from the circuit breaker by covering the screw head.

It is a figure which shows the handle | steering-wheel lock apparatus of the circuit breaker in which a padlock is hooked and a knob | pick part is locked to an OFF position and the removal from a circuit breaker is impossible. It is a figure showing composition of a handle lock device of this embodiment. It is a perspective view which shows the state which the lock member opened. It is a top view which shows the state which the lock member opened. It is a perspective view which shows the state which the lock member stood | started up. It is a perspective view which shows the state which the lock member fell down to the cover side. It is a top view which shows the state in which the locking member fell down to the cover side. It is the figure which showed the cross section of the principal part from the AA line direction of FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
FIG. 1 shows a handle lock device 2 attached to a circuit breaker 1 and a padlock 3 attached to the handle lock device 2. FIG. 2 shows the handle lock device 2 that is not attached to the circuit breaker 1. 3 and 4 show a state in which the lock member 13 of the handle lock device 2 not attached with the padlock 3 has fallen outside the circuit breaker 1, and FIG. 5 shows the handle without the padlock 3 attached. FIG. 6 and FIG. 7 show the locked state of the handle lock device 2 before the padlock 3 is mounted, and FIG. 8 shows the lock member 13 of the lock device 2 rising upward. It is principal part sectional drawing shown from the AA line direction.

  As shown in FIG. 1, the circuit breaker 1 includes a body case 4 including a box-shaped base 4a, a cover 4b, and an intermediate cover 4c disposed between the base 4a and the cover 4b. On both sides of the case 4, a three-pole power-side terminal portion 5 and a load-side terminal portion 6 are formed. The base 4a, the intermediate cover 4c, and the cover 4b are integrated with mounting screws 9a and 9b that pass through a partition provided between the electrodes of the power supply side terminal portion 5 and the load side terminal portion 6, and the mounting screw 9b is a handle. Since it passes through the pair of connecting portions 12A and 12B constituting the locking device 2, the screw is longer than the other mounting screws 9a.

An opening 4b1 is formed in the cover 4b of the main body case 4, and a knob 8 of a rocker-type handle 7 for operating a toggle link mechanism (opening / closing mechanism) disposed inside the main body case 4 is located upward from the opening 4b1. It protrudes. Here, symbol 8 _OFF indicates a position where the knob 8 has moved so that the main circuit contact of the circuit breaker 1 is open (OFF position), and symbol 8 _ON indicates that the main circuit contact is closed (ON). The position where the knob 8 is moved so as to be (position) is shown.

As shown in FIG. 2, the handle lock device 2 is fixed to a long frame member 10 made of a metal plate, a slider 11 slidably engaged with the frame member, and lower portions at both ends in the longitudinal direction of the frame member. A pair of connecting portions 12A and 12B made of synthetic resin and a lock member 13 made of synthetic resin that is rotatably connected to the frame member.
The frame member 10 includes a flat plate portion 10a, a padlock engaging plate portion 10b formed on one side in the short direction of the flat plate portion 10a, and a pair of fixed plate portions 10c and 10d formed on both ends in the longitudinal direction of the flat plate portion 10a. And locking member rotating plate portions 10e and 10f rising from the edge portions of the pair of fixed plate portions 10c and 10d, respectively.

A slit 10a1 is formed in the flat plate portion 10a in the longitudinal direction.
The padlock engaging plate portion 10b is formed with a lock hole 10b1 through which the temple 3a (see FIG. 1) of the padlock 3 passes.
The pair of fixed plate portions 10c and 10d are formed to be bent at a right angle in the same direction with respect to the flat plate portion 10a, and connection through holes 10c1 and 10d1 are formed.
The lock member rotating plate portion 10e is formed by being bent at a right angle in the same direction with respect to the fixed plate portion 10c, thereby forming a shaft hole 10e1. Further, the lock member rotating plate portion 10f is also bent at a right angle in the same direction with respect to the fixed plate portion 10d, and is formed so as to face the lock member rotating plate portion 10e in parallel with the pin hole ( (Not shown) is formed.

  As shown in FIG. 4, the slider 11 is provided integrally with the slider body 11 a that slides in the slit 10 a 1 formed in the flat plate portion 10 a of the frame member 10, and the knob portion 8 of the handle 7. A substantially C-shaped holding portion 11b that is engaged so as to surround the periphery, and the outer periphery of the slider body 11a is covered with a cover member 11c made of synthetic resin.

  As shown in FIG. 2, the pair of connecting portions 12A and 12B are formed integrally with frame connecting portions 12a1 and 12b1 and circuit breaker connecting portions 12a2 and 12b2. The frame connecting portions 12a1 and 12b1 are formed with fitting protrusions 12a3 and 12b3 that fit into the connecting through holes 10c1 and 10d1 of the pair of fixing plate portions 10c and 10d described above. Screw through holes 12a4 and 12b4 are formed in the circuit breaker connecting portions 12a2 and 12b2. The mounting screws 9b for integrating the base 4a, the intermediate cover 4c and the cover 4b described above pass through the screw through holes 12a4 and 12b4 of the circuit breaker connecting portions 12a2 and 12b2.

  As shown in FIG. 2, the lock member 13 is formed on the long lock main body 13a and both ends of the lock main body 13a in the longitudinal direction, and the shaft holes 10e1 of the lock member rotating plate portions 10e and 10f of the frame member 10. And a pair of screw closing portions 13c and 13c formed at both ends in the longitudinal direction of the lock main body 13a spaced from the rotation shaft 13b. I have. The lock body 13a is formed with a lock recess 13d into which the slider body 11a of the slider 11 enters.

As shown in FIG. 3, the handle lock device 2 having the above-described structure is provided on the cover 4b of the circuit breaker 1 by passing through the mounting screws 9b through the circuit breaker connection portions 12a2 and 12b2 of the pair of connection portions 12A and 12B. It is attached to.
At this time, the holding portion 11b of the slider 11 engages so as to surround the periphery of the knob portion _{8 ON,} for example the ON position.
The lock member 13 is rotatable about the axis of the pair of rotation shafts 13b engaged with the lock member rotation plate portions 10e and 10f of the frame member 10.
That is, as shown in FIG. 3, the lock member 13 falls to the outside of the circuit breaker 1. As shown in FIG. 6, the pair of screw closing portions 13 c and 13 c closes the attachment screw 9 b, and the slider 11. The slider main body 11a is covered and falls to the inside of the circuit breaker 1.

  Further, as shown in FIG. 5, the lock member 13 is held in a state of rising above the frame member 10. As shown in FIG. 8, the lock main body 13 a of the lock member 13 is formed with a lock member engaging piece 13 e that protrudes toward the fixing plate portion 10 c of the frame member 10. When rising upward, the flat outer peripheral surface 13e1 of the locking member engaging piece 13e shown in FIG. 8 is engaged with the fixed plate portion 10c, and the upward rising of the locking member is maintained.

Next, the procedure for locking the handle of the circuit breaker 1 to which the handle lock device 2 having the above-described configuration is locked to the OFF position with a padlock will be described with reference to FIGS.
First, as shown in FIG. 3, the handle lock device 2 is formed on the cover 4 b of the circuit breaker 1 by penetrating the mounting screws 9 b in the circuit breaker coupling portions 12 a 2 and 12 b 2 of the pair of coupling portions 12 A and 12 B. Installing. At this time, the holding portion 11b of the slider 11 engages so as to surround the periphery of the knob portion _{8 ON} of the handle 7 in the ON position.

  Here, although not shown, for example, when rails are laid in a panel such as a switchboard, and a plurality of circuit breakers 1 are mounted in close proximity to the rails, as shown in FIG. When the lock member 13 falls to the outside of the circuit breaker 1, it interferes with the operation of another adjacent circuit breaker 1. Therefore, in the present embodiment, by engaging the flat outer peripheral surface 13e1 of the lock member engaging piece 13e with the fixed plate portion 10c (see FIG. 8), as shown in FIG. By rotating around the axis of the moving shaft 13b and holding the frame member 10 in an upright position, the operation of the other adjacent circuit breakers 1 is not disturbed.

Next, as shown in FIG. 6, the handle 7 is moved from the ON position to the OFF position, and the knob 8 at the OFF position is _{turned OFF} . As the knob 8 is turned _ON, the slider 11 is also moved. Then, the lock member 13 is further rotated around the axis of the pair of rotation shafts 13 b, the pair of screw closing portions 13 c and 13 c closes the attachment screw 9 b, and the slider main body 11 a of the slider 11 is The lock member 13 is brought into a state where the lock member 13 has fallen inside the circuit breaker 1 in a state of being located in the lock recess 13d. Even in this state, it is possible to prevent the handle lock device 2 from being removed, but by using the padlock 3, it is possible to reliably prevent the handle lock device 2 from being removed.

Next, as shown in FIG. 1, the padlock 3 is hooked through the lock hole 10 b 1 of the frame member 10 through the vine of the padlock 3.
When the padlock 3 is hooked on the frame member 10, the lock member 13 cannot be rotated, the pair of screw closing portions 13 c and 13 c close the mounting screw 9 b, and the lock recess 13 d of the lock member 13 holds the slider 11. through restraining the movement to the ON position of the knob portion 8 _ON to.
Therefore, according to the handle lock device 2 of the present embodiment, the lock member 13 cannot be rotated because the padlock 3 is hooked on the frame member 10, and the pair of screw closing portions 13 c and 13 c close the attachment screw 9 b. Then, the lock recess 13d of the lock member 13 restrains the movement of the knob 8 _{ON to} the ON position via the slider 11, and the handle 7 can be locked to the OFF position and is removed from the circuit breaker 1. Can be impossible.

Further, in the handle lock device 2 of the present embodiment, the lock member 13 rotatably connected to the frame member 10 falls to the outside of the circuit breaker 1 according to the work space around the circuit breaker 1. Therefore, the circuit breaker 1 can be easily operated.
Furthermore, the handle lock device 2 of the present embodiment has a body case (base 4a, intermediate cover 4c, and cover) in the screw through holes 12a4 and 12b4 formed in the circuit breaker connection portions 12a2 and 12b2 of the pair of connection portions 12A and 12B. Since it is attached to the circuit breaker 1 simply by passing through the mounting screw 9b that integrates 4b), the attachment work to the circuit breaker 1 can be easily performed.

Further, since the lock member 13 including the lock body 13a, the pair of rotating shafts 13b, the pair of screw closing portions 13c, 13c, and the lock recess 13d is made of synthetic resin, it can be easily manufactured even if it has a complicated shape. The weight can also be reduced.
Although the handle lock device 2 of the present embodiment has been described by being mounted on the circuit breaker 1 including the three-pole power-side terminal portion 5 and the load-side terminal portion 6, the two-pole power-side terminal portion and Even if it is applied to a circuit breaker having a load side terminal portion, the same effect can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Circuit breaker, 2 ... Handle lock device, 3 ... Padlock, 3a ... Tsuru, 4 ... Main body case, 4a ... Base, 4b ... Cover, 4b1 ... Opening, 4c ... Intermediate cover, 5 ... Power supply side terminal part, 6 ... Load side terminal part, 7 ... Handle, 8 ... Knob part, 8 _OFF ... Knob part at OFF position, 8 _ON ... Knob part at ON position, 9a, 9b ... Mounting screw, 10 ... Frame member, 10a ... Flat plate part DESCRIPTION OF SYMBOLS 10a1 ... Slit, 10b ... Padlock engaging board part, 10b1 ... Locking hole, 10c, 10d ... Fixing board part, 10c1, 10d1 ... Connection through hole, 10e, 10f ... Lock member rotation board part, 10e1 ... Shaft hole , 11 ... slider, 11a ... slider body, 11b ... holding part, 11c ... cover member, 12A, 12B ... connection part, 12a1, 12b1 ... frame connection part, 12a2, 12b2 ... circuit breaker connection Part, 12a3, 12b3 ... fitting projection, 12a4, 12b4 ... screw through hole, 13 ... lock member, 13a ... lock body, 13b ... rotating shaft, 13c ... closing part, 13d ... lock recess, 13e ... lock member engagement Piece, 13e1: flat outer peripheral surface of the locking member engaging piece

Claims (5)

A handle lock device for locking a knob portion of a rocker type opening / closing operation handle protruding upward from a cover of a circuit breaker to an OFF position,
A metal frame member fixed by screws to the top of the cover;
A slider that is partially inserted into the slit formed in the frame member, engages with the knob, and slides in the slit along with the movement of the ON position and the OFF position of the knob;
When the knob is pivotally connected to the frame member and the knob is moved to the OFF position, the knob is constrained to the OFF position and the head of the screw that fixes the frame member to the cover is covered. A rotating locking member;
A handle lock device for a circuit breaker, comprising: a lock hole provided on the frame member and configured to prevent a rotation of the lock member by applying a padlock. The lock member has a rotation shaft extending in a direction along the upper surface of the cover, and is rotatable about the rotation shaft from a state where the rotation member is opened to the outside of the cover to a state where the lock member is collapsed to the upper portion of the cover. ,
The lock member includes a lock recess for constraining the knob to an OFF position by surrounding a part of the slider from the top when the lock member falls down on the upper part of the cover, and a screw closing part for covering the head of the screw. The handle lock device for a circuit breaker according to claim 1.   The handle lock device for a circuit breaker according to claim 1 or 2, wherein the lock member can maintain a standing state by engagement with the frame member.   The said frame member is being fixed to the upper part of the said cover by the attachment screw which assembles | attaches the cover and the main body case of the circuit breaker provided with the base arrange | positioned in the lower part of this cover. 4. The circuit breaker handle lock device according to any one of claims 1 to 3.   The handle lock device for a circuit breaker according to any one of claims 1 to 4, wherein the lock member is made of a synthetic resin.

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