JP2504959Y2 - Circuit breaker handle lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a device for locking a handle for operating a circuit breaker such as a wiring breaker or an earth leakage breaker in an open or closed state.

[Conventional technology]

FIG. 5 is a perspective view showing the shape of a cap constituting a handle lock device for a conventional circuit breaker. Cap 1
Is formed by bending a metal plate into a V shape. The fastening hole 2 penetrates through the left side of the figure in a V shape, and the tip portion 3 on the right side of the figure is bent into a U shape. The cap 1 is provided with dedicated caps having different bending angles and lengths depending on whether the handle of the circuit breaker is open or closed.

FIG. 6 (a) is a cross-sectional view when the circuit breaker is locked in the closed state, and FIG. 6 (b) is a view taken in the direction of arrow C with the padlock removed in FIG. 6 (a).

The main parts such as the opening / closing mechanism of the circuit breaker, the contacts, and the terminal part are housed in a container composed of the case 4 and the cover 7.
Illustration is omitted in FIG. 6 (a). The circuit breaker uses the lever 5 at one end 5A as a fulcrum and handles 6
It is opened or closed by rotating. The handle 6 is fixed to the end of the lever 5 on the side opposite to the fulcrum, and comprises a portion on the side opposite to the lever formed with an arcuate curved surface 10 and a plate-like handle 11 projectingly provided in the central portion. As will be described later with the handle 11 as a boundary, the character "ON" is displayed on the right surface of the arcuate curved surface 10 and the character "OFF" is displayed on the left surface thereof. The lever 5 is adapted to rotate by manually pushing the plate surface of the handle 11 in the left-right direction in the drawing. The cover 7 is provided with a rectangular opening 12, and a handle 11 projects from the opening 12. The opening 12 is formed so that the width in the left-right direction in the drawing is slightly larger than the maximum operation width of the handle 11 so that the handle 11 can be rotated.

The circuit breaker of FIG. 6 (a) is shown in the closed state, and in this state, the closing cap 1 is attached to the handle 11 to lock the rotation of the handle 6. As shown in FIG. 4, the cap 1 extends along the arcuate curved surface 10 of the handle 6 and the V-shaped portion that fits into the handle 11, and its tip end contacts the right edge 13A of the opening 12 of the cover 7. It consists of contacting parts. Further, the retaining hole of the cap 1 is configured to coincide with the handle hole 14 provided in the handle 11. This fastening hole 2
The curved pin 15 of the padlock 9 penetrates through both the handle and the handle hole 14, and the handle 6 is locked in the closed state by locking the padlock 9. Cap 1 is the handle 11
The padlock 9 prevents the cap 1 from being removed from the handle 11 by anyone other than the person concerned.

FIG. 6B shows a state in which the handle 11 (dotted line) that penetrates the opening 12 provided in the cover 7 is covered with the cap 1.
In this case, the ON character (dotted line) displayed on the curved surface of the handle is hidden by the cap 1 and cannot be seen. In addition,
FIG. 6 (a) corresponds to the cross-sectional view taken along the line RR of FIG. 6 (b).

FIG. 7 (a) is a cross-sectional view when the circuit breaker is locked in an open state, and FIG. 7 (b) is a view taken in the direction of the arrow D with the padlock removed in FIG. 7 (a). Figure 7 (a) is the handle
The opening 11 is provided on the right side of the opening 12, that is, in a state in which the opening 1 is tilted to the open state, and is covered with the opening cap 1, and other configurations are the same as those in FIG. 6 (a).

FIG. 7B shows a state in which the handle 11 (dotted line) penetrating the opening 12 is covered with the cap 1. In this case, the OFF character (dotted line) displayed on the curved surface of the handle is hidden by the cap 1 and cannot be seen. In addition, FIG.
It corresponds to the cross-sectional view taken along the line S-S in FIG.

As described above, the caps 1 mounted in FIGS. 6 (a) and 7 (a) are for closing and opening, respectively, and their dimensions and bending angles are slightly different from each other. The reason is that, as can be seen from FIG. 6 (a), the grip 11 is not provided so as to project at a right angle to the arcuate curved surface 10 of the handle 6. Since the handle 11 is formed to open slightly to the right of the right angle on the curved surface 10, the opening 12
The root of the handle 11 does not come into contact with the left edge 13B of the handle. This enables the opening width of the opening 12 to be narrowed. The handle 6 has a function of hiding the inside of the case 4 by making the opening width of the opening 12 as small as possible.
The arc width of the arc curved surface 10 can be small. Thereby,
The amount by which the end portion 10A of the arcuate curved surface 10 projects into the case 4 is also reduced, and the space inside the case 4 can be effectively used.

[Problems to be solved by the device]

However, in the conventional handle locking device as described above, there is a gap between the cap and the handle, and when the handle is moved, there is a risk that the cap may float due to rattling and the lock may be released.

That is, since the cap of the conventional device is made by bending the metal plate, it is very difficult to process it according to the curved surface of the handle. As a result, a gap was created between the cap and the handle, and rattling was likely to occur.
The padlock bolt, handle handle and cap do not separate from each other, but when the cap is moved, the rattling of the cap causes the tip of the cap to float up from the edge of the cover opening, and the handle may be unlocked. was there.

Also, in the conventional handle lock device, when the handle is covered with a cap, the characters displayed on the curved surface of the handle are hidden and invisible, but in this state, the state is opened or closed. There was also a problem that it could not be determined whether or not there was. Until now, when the handle was locked, the open / closed state of the handle was determined only by the direction in which the handle was tilted.

An object of the present invention is to provide a device in which rattling of a handle is eliminated by molding a cap with a molded product, and there is no risk of the lock coming off.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, a container including a case and a cover for accommodating the circuit breaker main body, an arc curved surface formed on the inside of the container and on the cover side, and a direction in which the arc curved surface extends. A circuit breaker comprising a handle for opening and closing the circuit breaker by rotating the handle and a handle fixed to the center of the curved surface of the handle and protruding through the opening of the cover to the outside of the container. A frame which forms a rectangular frame hole and locks the handle when the circuit breaker is in a closed or open state, and a projection which is fixed to the side surface of the frame and projects outward from the frame hole. In the closed state and the open state of the circuit breaker, the handle is inserted from the opposite direction of the frame hole and attached to the handle to prevent the handle from rotating. With it is composed by-up,
The cap is molded by molding, and the inner wall of the frame hole on the side opposite to the protrusion has different inclination angles so that the circuit breaker is in contact with the handle in both the closed state and the open state when the cap is attached to the handle. Two slopes are formed.

In addition to this configuration, the thickness of both end surfaces of the protrusions forming the cap is formed to be smaller than half the opening width of the cover opening, and when the cap is attached, the protrusions are formed on one side in the cover opening. In addition, each of both end surfaces of the projection part that constitutes the cap is provided with a hook groove whose bottom forms an L-shaped bent cross section, and the end of the projection part that constitutes the cap. The portion is provided with an engagement protrusion that engages with a groove provided inside the cover.

[Action]

According to the configuration of the present invention, a cap is formed by the frame portion forming the rectangular frame hole and the protrusion fixed to the side surface of the frame portion and protruding toward the outside of the frame hole, and the circuit breaker is closed. The handle is inserted from the opposite direction of the frame hole and attached to the handle depending on whether it is in the open state or the open state. Therefore, by using both sides of one cap, the circuit breaker closes and opens. The handle can be locked in any state. Since a retaining hole that penetrates outward from the inner wall of the frame hole on the side opposite the protrusion is provided, the padlock's bolt is penetrated through both this retaining hole and the handle hole provided through the handle. It is possible to prevent the cap from being removed from the handle by other means. Since the cap is molded by the molded product, both end surfaces of the protrusion in the frame hole penetrating direction can be easily formed so as to protrude from the frame so as to fit into the cover opening and to be in contact with the curved surface of the handle. Also,
When the end surface of the protruding part of the protruding part is in contact with the edge of the cover opening and the end face of the protruding part is aligned with the curved surface of the handle arc, the end face of the frame part in the frame hole penetrating direction is set to the surface of the cover. It can be formed so as to be in contact with and along. Further, the inner wall of the frame hole on the side opposite to the projection should form two slopes having different inclination angles so that the circuit breaker comes into contact with the handle in each of the closed state and the open state when the cap is attached to the handle. This ensures that the cap fits into the opening without rattling and there is no risk of the handle lock coming off.

In addition, the thickness of the protrusions that make up the cap is made smaller than half the opening width of the cover opening, and when the cap is attached, the protrusions are arranged to move to one side within the cover opening. The characters “ON” or “OFF” displayed on the curved surface can be seen from the outside.

Further, since the bottom of each of the both end surfaces of the protruding portion forming the cap has an L-shaped bent cross section, a hook can be hooked on the hook groove to hang the display tag.

Furthermore, since a protrusion is provided at the end of the protrusion that constitutes the cap and engages with the groove provided on the cover side where the cap is mounted, the cap is fixed by the engagement between the protrusion and the groove. Will be more certain.

〔Example〕

 The present invention will be described below based on embodiments.

FIG. 1 is a perspective view showing the shape of a cap constituting a handle lock device for a circuit breaker according to an embodiment of the present invention. The cap 16 molded by molding is a rectangular frame hole 21
And a frame hole 21 fixed to the side surface of the frame portion 22
It is composed of a protruding portion 23 protruding toward the outside. When the circuit breaker is in the open state and the circuit breaker is in the closed state, the cap 16 is attached to the handle by penetrating the handle from the opposite direction of the frame hole 21, respectively.

Both end faces 23A, 23B of the protrusion 23 are formed so as to protrude from the frame portion 22 so as to be fitted in the openings and to be in contact with the curved surface of the handle arc. Also, this protrusion 23
L-shaped hook grooves 25 are provided on both end faces 23A, 23B.
Further, the protrusion 23 is attached to one side of the frame hole 21, and its thickness d is formed to be smaller than half the opening width of the cover opening.

Both end surfaces 22A and 22B of the frame portion 22 are formed in a state in which the tip end of the protrusion 23 is brought into contact with the edge of the cover opening.
When the end surfaces 23A, 23B of the are aligned along the curved surface of the handle arc, they are formed so as to be in contact with the surface of the cover. Further, the frame portion 22 is provided with a retaining hole 24 through which the padlock bolt penetrates from the inner wall of the frame hole 21 toward the outside. Furthermore, the inner wall of the frame hole 21 has two slopes 18A, 18 with different inclination angles.
Forming B.

The projecting portion 23 and the frame portion 22 are separately molded with a casting resin using a dedicated mold, and are integrally configured by adhering each other. Therefore, unlike a cap made by bending a metal plate like a conventional cap, the cap 16 can have a shape that exactly follows the surface of a handle or a cover. Also, the hook groove 25 in FIG. 1 can be easily provided by molding, and when the handle is locked, a string or the like can be hung in the groove to hang the display tag on which the name of the person in charge and the precautions are written. it can.

FIG. 2 (a) is a sectional view of the essential parts when the circuit breaker is locked in the closed state using the cap 16 according to the embodiment of FIG. 1, and FIG. 2 (b) is the padlock in FIG. 2 (a). It is the A arrow line view of the state except.

2A, the cap 16 is attached to the handle 6 by directing the end face 23A side of the projection 23 of the cap 16 toward the arc curved surface 10 side of the handle 6 and penetrating the handle 11 through the frame hole. The end surface 23A of the protrusion 23 is arranged so as to contact the arcuate curved surface 10 of the handle 6. At this time, the protruding tip of the projection 23 is brought into contact with the edge 13A of the opening 12 of the cover 7, and the slope 16A of the frame 22 is in contact with the handle 11 so that the cap 16 is removed. It is set so that it does not exist. Frame
The handle 6 is locked in a closed state by penetrating the lock 15 of the padlock 9 through both the retaining hole 22 and the handle hole of the handle 11 and locking. Since the other structure is the same as that of FIG. 5A, the same portions are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 2B shows the frame 22 on the peripheral cover 7 of the opening 12.
Are arranged, and the handle 11 penetrates the frame hole 21. protrusion
23 is arranged on the curved surface 10 of the handle, and the curved surface 10
The character "ON" displayed above is configured to be visible from the outside through the opening 12. Note that FIG. 2 (a) corresponds to the cross-sectional view taken along the line PP of FIG. 2 (b).

FIG. 3 (a) is a cross-sectional view of essential parts when the circuit breaker in the open state is locked by using the cap according to the embodiment of FIG. 1, and FIG. 3 (b) is a padlock in FIG. 3 (a). It is a B arrow line view of the state which excluded.

In FIG. 3 (a), the cap 16 is attached to the handle 6 by penetrating the handle 11 from the direction opposite to the frame hole in the case of FIG. 2 (a). The end surface 23B of the protrusion 23 is arranged so as to contact the arcuate curved surface 10 of the handle 6. At that time, the protrusion
The projecting tip of 23 is brought into contact with the edge 13B of the opening 12 of the cover 7 and is arranged so that the slope 18 of the frame 22 is in contact with the handle 11 and the cap 16 is housed without rattling. . Other configurations are the same as those in FIG. 2 (a).

FIG. 3B shows a frame portion on the cover 7 around the opening 12.
22 is arranged, and the handle 11 penetrates the frame hole 21. The protrusion 23 is arranged on the curved surface 10 of the handle, and the curved surface
The word "OFF" displayed above 10 is configured to be visible from the outside through the opening 12. Note that FIG. 3 (a) corresponds to a cross-sectional view taken along the line QQ of FIG. 3 (b).

FIG. 4 (b) shows that the engaging projections 26A and 26B are attached to the ends of the projection 23.
It is the top view which shows the cap 16 which provided, and the AA sectional view taken on the line of FIG. 4 (a) and FIG. 4 (b). The engagement protrusions 26A and 26B are
When the cap 16 is fitted into the cover of the case, it engages with a groove provided on the cover side.

[Effect of device]

As described above, according to the present invention, the cap is fitted to the handle from the opposite direction when the circuit breaker is in the closed state and the circuit breaker is in the opened state, so that the circuit breaker can be opened with one cap. The handle can be locked in both closed states.

Since the cap is molded with a molded product, both end faces of the protrusion and the frame can be formed so as to be in contact with the handle, the handle and the opening of the cover without rattling, and the handle is unlocked. A non-dangerous device can be provided.

In addition, since the thickness of the projection of the cap is smaller than half the opening width of the cover opening and the projection is configured to be close to one side of the opening, it is displayed on the curved surface of the handle even when locked. The displayed ON or OFF characters can be seen from the outside.

Further, since the hook groove is provided on the end surface of the protruding portion of the cap, the display tag can be hung in the hook groove.

[Brief description of drawings]

FIG. 1 is a perspective view showing a shape of a cap constituting a handle lock device of a circuit breaker according to an embodiment of the present invention,
2 (a) and 3 (a) are sectional views of essential parts when the circuit breaker is locked in the closed state and the open state using the cap according to the embodiment of FIG. 1, respectively, and FIG. ) Is the second
FIG. 3A is a view as seen from the direction of arrow A, and FIG. 3B is B of FIG. 3A.
4 is a side view and FIG. 4 (b) is a plan view showing a cap constituting a handle lock device of a circuit breaker according to another embodiment of the present invention. FIG. 5 is a perspective view showing the shape of a cap constituting a handle lock device for a conventional circuit breaker, FIG. 6 (a),
FIG. 7 (a) is a sectional view when the circuit breaker is locked in the closed state and the open state using the conventional cap shown in FIG. 5, and FIG. 6 (b) is shown in FIG. 6 (a). ) Is a view on arrow C, and FIG. 7 (b) is a view on arrow D in FIG. 7 (a). 1, 16 ... Cap, 2, 24 ... Fastening hole, 3 ... Tip part, 4 ... Case, 5 ... Lever, 6 ... Handle, 7 ... Cover, 9 ... Padlock, 10 ... Arc curved surface, 10A ... End part, 11 ... Handle, 12 ... Opening, 13A, 13B ... Edge, 14 ... Handle hole, 15 ... Hole, 21 ...
Frame hole, 22 ... Frame portion, 23 ... Projection portion, 22A, 22B, 23A, 23B ... End surface, 25 ... Hook groove.

Claims (4)

(57) [Scope of utility model registration request] 1. A circuit breaker comprising a case and a cover for accommodating a main body of the circuit breaker, and an arc curved surface formed on the inside of the container and having a cover side and rotated in a direction in which the arc curved surface extends. In a circuit breaker equipped with a handle for driving to open and close, and a handle fixed to the center of the curved surface of the handle and protruding through the opening of the cover to the outside of the container, the handle is closed and closed. It locks in the open state,
It comprises a frame portion forming a rectangular frame hole and a projection portion fixed to the side surface of the frame portion and protruding toward the outside of the frame hole. It is composed of a cap that blocks the rotation of the handle by inserting the handle from the direction and mounting it on the handle, and the cap is molded by a molding, and the inner wall of the frame hole on the side opposite to the protrusion is mounted on the handle. A handle lock device for a circuit breaker, characterized in that the circuit breaker is formed with two slopes having different inclination angles so as to come into contact with the handle and follow along in each of the closed state and the open state. 2. The cap according to claim 1, wherein the thickness of both end faces of the projection portion forming the cap is smaller than half of the opening width of the cover opening portion, and the projection portion is formed when the cap is attached. A handle lock device for a circuit breaker, wherein the handle lock device is configured so as to be close to one side in a cover opening. 3. The cap according to claim 1 or 2, wherein a bottom portion is L on each of both end surfaces of the protrusion portion forming the cap.
A handle lock device for a circuit breaker, characterized in that it is provided with a hook groove that forms a curved cross section. 4. The circuit according to any one of claims 1 to 3, wherein an engaging protrusion that engages with a groove provided inside the cover is provided at an end portion of the protrusion forming the cap. Circuit breaker handle lock device.