JPH0567423A - Outside operating handle device for wiring circuit breaker - Google Patents

Abstract

PURPOSE:To simplify a mechanism for holding a lock lever for locking a board door at a locking position. CONSTITUTION:A plate spring 19 having two inclined surfaces 19a, 19b forming a mountain shape is provided. The inclined surface 19a is engaged with a projection 18c of a lock lever 18 so as to hold the lock lever 18 at a locking position wherein the lock lever 18 is engaged with a locking metal fixture 20 fixed to a door of a board. When the inclined surface 19b is engaged with the projection 18c, the lock lever 18 is held at an unlocking position wherein the lever 18 is released from the locking metal fixture 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external operation handle device for a wiring breaker, and more particularly to an external operation handle device having a function of locking a panel door such as a switchboard or a control panel having a wiring breaker incorporated therein.

[0002]

2. Description of the Related Art This type of external operating handle device (hereinafter referred to as
There is a type in which the device body is mounted on the side of the circuit breaker for wiring, and a type in which the device body is mounted on the door side of the board. As the former type, the one described in Japanese Patent Publication No. 2-6182 is known. This device engages with a door of a board that incorporates a circuit breaker for wiring in association with a handle, and is supported by a lock lever capable of locking the door and a base plate integrated with the circuit breaker for wiring. A release pin that rotatably holds the lever, a release lever that is formed integrally with the release pin and that is rotated by the release pin, a pullback spring that biases the lock lever toward the locking position, and the lock lever are A leaf spring that holds the lock lever in the unlocked position when guided to the unlocked position in association with the handle, and the release lever is the lock lever when the release pin is rotated. And a lock lever is provided to engage with the lock lever, and the release lever is guided to the unlocked position while being engaged with the lock lever. Wherein the plate spring is pushed up by the release lever, in which as the engagement state is released with the leaf spring and the locking lever.

As a type in which the main body of the apparatus is attached to the door side of the board, those shown in FIGS. 14 to 16 are conventionally known. FIG. 1 is a perspective view of the door 6 of the board viewed from the front side, and the main body of the handle device 1 is attached to the door 6 of the board. Here, by setting the handle 7 to the on position or the off position according to the display of the decorative plate 9 on the front surface, the wiring breaker 2 is turned on or off, respectively. Then, from the off position of FIG.
When is further rotated clockwise to the open position, the engagement between the lock lever 18 on the door 6 side and the lock fitting 20 on the wiring breaker 2 side is released, and the door 6 opens.

15 and 16 are rear views of the handle device shown in FIG. 14, and when the handle 7 is turned from the on or off position shown in FIG. 15 to the open position shown in FIG. The lever 18 is pushed and rotated by the crank plate 14 connected to the handle 7, and is disengaged from the lock fitting 20. When the hand is released from the handle 7, the lock lever 18 returns to the state of FIG. 15 by the return spring 26 which is a tension spring provided between the lock lever 18 and the base plate 12.

[0005]

However, the above-mentioned conventional device has the following drawbacks. That is, first, in the device disclosed in Japanese Examined Patent Publication No. 2-6182, a leaf spring formed by bending a lever engaging portion and a lever holding portion is crimped in order to hold the lock lever in the locking position and the unlocking position. The lock lever is pressed against the base plate by the spring force of this leaf spring to hold it in the locked position, and at the unlocked position, the lock lever is stepped with the separately provided return spring. It is designed to be locked to the part.

However, the pressing force of the leaf spring attached to the base plate fluctuates depending on the fixing condition (caulking condition), and when the lock lever is moved from the unlocked state to the locked state, the lock lever does not move, or vice versa. In the locked state, the lock lever may not be able to engage with the lever engaging portion of the leaf spring. Therefore, it is necessary to pay close attention to the flatness of the leaf spring and its mounting work.
Further, it takes time and effort to adjust the force relationship with the return spring.

In order to automatically return the lock lever to the locked posture when the release pin is released from the restraint of the hand when the door is unlocked by rotating the release pin while the circuit breaker is on. A release lever having an engaging portion that engages with the lock lever is integrally joined to a release pin that rotatably supports the lock lever by caulking or the like. However, if such a release lever is provided, the number of parts increases, and the lock pin is rotatably fitted to the release pin inserted into the base plate, and the complicated assembly work of caulking the release lever from above is performed. Will be needed.

On the other hand, in the conventional device shown in FIGS. 14 to 16, when the hand is released from the handle at the open position, the door is locked again by the action of the return spring.
When opening the door, it is necessary to hold the handle in the open position, and when two or more handle devices are attached to one door panel, use both hands or two to open the door.
You must work with more than one person. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a handle device for a circuit breaker for wiring which has a simple structure and excellent operability while maintaining the same function.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a spring-like holding member is provided which engages a lock lever with two slopes forming a mountain shape and holds the lock lever in a locked position and an unlocked position, respectively. The above object is achieved. Further, according to the present invention, the release lever is not required by providing the return fitting for pushing out the lock lever held in the unlocked position in the locking direction when the door is opened. The return fitting can be integrally configured with a lock fitting that engages with the lock lever.

[0010]

In the present invention, a spring-like holding member having two slopes forming a mountain shape is provided, and when one of these slopes is engaged with the lock lever, it is urged in the locking direction and the other is biased. When engaged with the lock lever, it is configured to urge the lock lever in the unlocking direction. As a result, the lock lever can be moved from one of the locked position and the unlocked position to the other only by elastically surmounting the mountain shape of the holding member, and the lock lever operates as compared with the conventional configuration in which the lock lever is pressed against the base plate by the leaf spring. Is stable, and the conventional return spring is unnecessary. In that case, since the lock lever in the unlocked position is held in the same position even if the handle is released, it is possible to operate with one hand even when two or more handle devices are attached. In addition, by providing a return fitting on the door of the board and pushing out the lock lever held in the unlocked position by this return fitting in the locking direction when opening the door, the lock lever automatically moves with the force of the holding member. Return to locked position. The structure of the return fitting is simpler than that of the release lever of the conventional device, and the structure is further simplified by integrally forming it with the lock fitting.

[0011]

Embodiments of the present invention will be described below with reference to FIGS. Embodiment 1 FIGS. 1 to 6 show an embodiment of a handle device in which the main body of the device is attached to the side of the circuit breaker for wiring. First, FIG. 6 is an exploded perspective view showing a relationship between a wiring breaker equipped with a handle device and a door of a board in which the wiring breaker is built. In the figure, the handle device 1 is placed on the operation surface of the wiring breaker 2, and the screw 3 and nut 4
It is fastened to the panel 5 together with. On the other hand, the door 6 has a round hole 8 through which the handle 7 of the handle device 1 can be seen. Then, a decorative plate 9 and a metal plate 10 having similar circular holes are applied from the front and rear of the door 6 with the round hole 8 sandwiched therebetween, and these are fastened to each other with screws 11.

1 and 2 show the handle device 1 in which a handle 7 is in an on position or an off position. FIG. 1 (A) is a front view, FIG. 1 (B) is a side view thereof, and FIG.
It is a rear view of (A). 3 shows the handle device 1 with the handle 7 in the open position, (A) is a front view, (B) is a side view thereof, and (C) is a rear view of the same. In these figures, 12 is a box-shaped base plate, which is integrally connected to the circuit breaker 2 with a screw 3 (FIG. 7) penetrating the mounting leg 12a. The handle 7 is fitted into the base plate 12 from the front side, and is connected to the crank plate 14 on the rear side via an operation shaft 13 that rotatably penetrates the base plate 12. Reference numeral 15 denotes an arm that swings around a pin 16 as a fulcrum in conjunction with the crank plate 14 (omitted in FIG. 3C).
Then, the operation handle 1a of the circuit breaker 2 is inserted through the square hole 15a.
(FIG. 1 (B)) is connected and this is opened and closed.

Reference numeral 17 is a release pin that rotatably penetrates through the base plate 12, and reference numeral 18 is a lock lever that is integrally connected to the release pin 17 on the back side of the base plate 12. 19
Is a leaf spring as a holding member for holding the lock lever 18 in the locked position and the unlocked position, and is a screw at one end of the base plate 1
It is fixed to No. 2 and its tip is formed in a mountain shape composed of slopes 19a and 19b. The leaf springs 19 have these slopes 19
The protrusions 18c of the lock lever 18 are engaged with a and 19b. The metal fitting plate 10 fixed to the door 6 is bent at a right angle on one side, and a lock metal fitting 20 that engages with the lock lever 18 and a return metal fitting 21 that faces the lock metal fitting 18 are integrally formed at this bent portion.

1 and 2, the lock lever 18 is engaged with the hook 20a of the lock fitting 20 and the door 6 is locked. At this time, the protrusion 18c of the lock lever 18 is engaged with a mountain-shaped front slope (return slope) 19a formed at the tip of the leaf spring 19 and receives a force in the clockwise direction in the figure, that is, the locking direction. here,
As shown by the arrow in FIG. 1A, when the handle 7 is rotated 90 degrees from the on position to the off position, the crank plate 14
Also integrally rotates, and the protrusion 14a moves to the position shown by the chain double-dashed line in FIG. However, the door 6 is still locked.

Next, as shown by the arrow in FIG.
When the handle 7 is further rotated to the open position, FIG.
As shown in (C), the protrusion 14a of the crank plate 14 contacts the protrusion 18a of the lock lever 18, and the lock lever 18
Is rotated counterclockwise to the position shown in the figure, and the engagement with the lock fitting 20 is released. At the same time, the lock lever 18
The protrusion 18c elastically deforms the leaf spring 19 to overcome the mountain shape and engages the slope 19b. As a result, the lock lever 18 receives a force in the counterclockwise direction in FIG. 3C, is held in the unlocked position shown, and the door 6 can be opened. When the hand is released from the handle 7 in this state, the handle 7 returns to the off position by the force from the operation handle 1a, and the crank plate 14
The protrusion 14a also rotates to the position indicated by the chain double-dashed line in FIG.

Here, when the handle 7 is returned to the ON position again, the protrusion 14a of the crank plate 14 contacts the protrusion 18b of the lock lever 18, and the lock lever 18 is moved to the position shown in FIG.
Rotate clockwise. As a result, the lock lever 1
The protrusion 18c of No. 8 rides over the chevron of the leaf spring 19 and engages with the return slope 19a.
Engage again with. In addition to the operation of the handle 7, the locking and unlocking of the door 6 is performed by turning the lock lever 18 by applying the tip of the driver to the groove 17a (FIG. 1A) on the front end surface of the release pin 17. It is also possible to do so.

When the door 6 is opened while the door 6 is unlocked, the slope 21a of the return fitting 21 abuts on the lock lever 18 in the process as shown in FIG. Push back in the direction. As a result, the lock lever 18 rotates clockwise in FIG. 3C and automatically returns to the locked position shown in FIG. After that, when the door 6 is closed, the hook 20a engages with the lock fitting 20 while pushing the lock lever 18 back slightly in the counterclockwise direction in FIG. 2 on the slope 20b (FIG. 4) to lock the door 6. At this time, the lock lever 18 returns only slightly, and the protrusion 18c does not ride over the chevron shape of the leaf spring 19. For safety, a claw portion 14b is provided in a stepped shape on the outer peripheral portion of the crank plate 14. When the handle 7 is operated to the ON position while the door 6 is open, the claw 14b is not shown in FIG.
As shown in (4), it engages with the protrusion 18a of the lock lever 18 and acts to prevent the wiring breaker from being closed.

As described above, the lock lever 18 is held in the locked position and the unlocked position, respectively, depending on which of the two slopes 19a and 19b of the leaf spring 19 the projection 18a engages with, and the switching between these two positions. Is the protrusion 18a
Is performed by elastically deforming the leaf spring 19 and overcoming the mountain shape. Such a configuration is more reliable in operation and easier to manufacture than the conventional configuration in which the pressing force for holding the lock lever in the unlocked position is managed. Furthermore, since the leaf spring 19 has a function of returning the lock lever 18 to the locked position, the return spring in the conventional configuration is unnecessary.

Further, the handle 7 or the release pin 1
When the door 6 is opened after the door 6 is unlocked by any one of the operations of 7, the lock lever 18 is pushed back from the unlocked position to the locking direction by the return fitting 21, and then the door 6 is closed. When the door 6 is locked, the door 6 is automatically locked, so that the door 6 will not be forgotten in any case. The return fitting 21 has a simpler structure than the conventional release lever, and the lock fitting 20 is similar to the illustrated embodiment.
If it is formed integrally with, the structure will be simpler.

Embodiment 2 FIG. 7 shows an embodiment in which a holding member for holding the lock lever 18 in the locked position and the unlocked position is constituted differently.
In the holding member 22 in this case, a mountain-shaped top 23 is biased by the compression coil spring 24 and held in the frame 25 so as to be retractable in the vertical direction in the figure, and the slopes 23a and 23b are engaged with the projection 18a. The lock lever 18 in the locking direction and the unlocking direction. The protrusion 18a compresses the coil spring 24 and dents the top 23, overcoming the chevron head and moving to the slope 23a or 23b on the opposite side.

Embodiment 3 FIGS. 8 to 13 show an embodiment of a handle device of the type in which the main body of the device is attached to the door side. First, in FIG. 8, the handle device 1 is applied to the back surface of the door 6 with the handle 7 being seen through the round hole 8, and is tightened to the door 6 with the screw 3 together with the decorative plate 9 stacked on the front surface of the door 6. Be done. FIG. 9 shows a state in which the circuit breaker 2 for wiring is housed in a board provided with the door 6, and the metal fitting plate 10 forming the lock fitting 20 and the return fitting 21 is fixed to the board side.

FIG. 10A is a front view of the handle device 1 when the handle 7 is in the on position or the off position and the door 6 is locked, and FIG. 10B is a side view thereof. Further, FIG. 11A is a front view of the handle device 1 in a state where the handle 7 is in the open position and the door 6 is unlocked, and FIG. 11B is a side view thereof. In this third embodiment, the lock lever 18 has its engaging end bent at a right angle as shown in FIG.
8d and a slope 18e, and a slope 18f is formed on the opposite side. On the other hand, the metal plate 10 has a hook 18
The lock metal fitting 20 that engages with d is bent and formed on one side, and the return metal fitting 21 that interferes with the slope 18f is bent and formed on the opposite side as described later.

12 and 13 are rear views of the handle device 1. In FIG. 12, the handle 7 is in the on position or in the off position, and in FIG. 13, it is in the open position, but its configuration and operation are the same as in the first embodiment. Is. That is, when the door 6 is locked in FIG.
While the lock lever 18 is engaged with 0, the protrusion 18c of the lock lever 18 is engaged with the slope (return slope) 19a of the leaf spring 19 and receives a force in the locking direction. Here, as shown by the arrow in FIG. 11A, the handle 7 is moved from the on position to the off position by 90 degrees.
When it is rotated by one degree, the crank plate 14 is also rotated integrally, and the protrusion 14a thereof moves to the position shown by the chain double-dashed line in FIG.
The door 6 is still locked.

Then, as shown by the arrow in FIG. 11A, when the handle 7 is further rotated to the open position,
As shown in FIG. 13, the protrusion 14a of the crank plate 14 contacts the protrusion 18a of the lock lever 18, and the lock lever 18
Is rotated to the position shown in the figure, and the engagement with the lock fitting 20 is released as shown in FIG. 11 (B). At the same time, the protrusion 18c of the lock lever 18 overcomes the chevron shape of the leaf spring 19 and engages with the slope 19b. As a result, the lock lever 18 is held in the unlocked position, and the door 6 can be opened.

Here, when the handle 7 is returned to the ON position again, the protrusion 14a of the crank plate 14 contacts the protrusion 18b of the lock lever 18, and the lock lever 18 is rotated clockwise in FIG. As a result, the protrusion 18c of the lock lever 18 engages with the return slope 19a, and the lock lever 1
8 again engages with the lock fitting 20. In order to lock and unlock the door 6 described above, separately from the operation of the handle 7, the tip of the driver is applied to the groove 17a (FIG. 10A) on the front end surface of the release pin 17 to rotate the lock lever 18. It is also possible to do so.

Next, when the door 6 is opened with the door 6 unlocked, the slope 18f of the lock lever 18 abuts the return fitting 21 in the process as shown in FIG. 11 (B), and the locking direction indicated by the arrow. Pushed back to. As a result, the lock lever 18 rotates clockwise in FIG. 13 and automatically returns to the locked position shown in FIG. Then, when the door 6 is closed, the slope 18e (FIG. 11 (B)) of the lock lever 18 abuts the lock fitting 20, and the lock lever 18 is slightly pushed back counterclockwise in FIG. To lock.

According to such a structure, once the handle 7 is turned to the open position, the lock lever 18 moves the leaf spring 1.
Since it is held in the unlocked position by the slope 19b of 9, the door 6 can be easily opened by one-handed operation even when the door 6 is provided with a large number of handle devices 1. Further, the door 6 is operated by operating either the handle 7 or the release pin 17.
When the door 6 is opened after being unlocked, the lock lever 18 is pushed back from the unlocked position by the return fitting 21 in the locking direction, and then the lock lever 18 is automatically locked when the door 6 is closed. Door 6 in any case
Never forget to lock.

[0028]

As described above, according to the present invention, the following effects can be obtained. (1) Since the lock lever holding mechanism does not require delicate adjustment of the spring force, and the lock lever return spring is not required, component processing and assembly work are facilitated, and operational reliability is enhanced. (2) By providing a return metal fitting that can be integrally formed with the lock metal fitting, forgetting to lock can be prevented without providing a release lever, and the configuration is further simplified. (3) Once the handle is turned to the open position, the unlocked state of the door is maintained even if the hand is released, so the door can be opened with one hand even when multiple handle devices are attached to the same door.

[Brief description of drawings]

FIG. 1A is a front view of a door lock state according to a first embodiment of the present invention, and FIG. 1B is a side view thereof.

FIG. 2 is a rear view of FIG.

3A is a front view of the apparatus of FIG. 1 in a door unlocked state, FIG. 3B is a side view thereof, and FIG. 3C is a rear view of the same.

FIG. 4 is a side view of the device of FIG. 1 in the process of opening the door.

FIG. 5 is a rear view of the device of FIG. 1 when the handle is turned on with the door open.

6 is an exploded perspective view showing a relationship between a wiring breaker to which the device of FIG. 1 is attached and a door of a board in which the wiring breaker is built.

FIG. 7 is a rear view of the second embodiment of the present invention.

FIG. 8 is an exploded perspective view of a third embodiment of the present invention.

9 is a perspective view of a board equipped with the handle device of FIG. 8. FIG.

10A is a front view of the apparatus of FIG. 8 in a door lock state, and FIG. 10B is a side view thereof.

11A is a front view of the apparatus of FIG. 8 in a door unlocked state, and FIG. 11B is a side view thereof.

FIG. 12 is a rear view of FIG.

FIG. 13 is a rear view of FIG.

FIG. 14 is a perspective view of a conventional example.

FIG. 15 is a rear view of the conventional example of FIG. 14 in a door locked state.

16 is a rear view of the conventional example of FIG. 14 in a door unlocked state.

[Explanation of symbols]

 1 Handle Device 2 Circuit Breaker 6 Door 7 Handle 12 Base Plate 17 Release Pin 18 Lock Lever 19 Holding Member 20 Lock Metal Fitting 21 Return Metal Fitting 22 Holding Member

Claims (3)

[Claims] 1. A wiring circuit breaker having a handle for opening and closing a wiring circuit breaker housed in a panel from the outside, and a lock lever for interlocking with the handle to lock and unlock the panel door. The external operation handle device is provided with a spring-like holding member that engages with the lock lever on the two slopes forming the chevron and holds the lock lever in the locked position and the unlocked position, respectively. External operation handle device. 2. The device according to claim 1, further comprising a return fitting for pushing out the lock lever held in the unlocked position in the locking direction when the door is opened. Operation handle device. 3. An external operating handle device for a circuit breaker according to claim 2, wherein the return fitting is integrally formed with a lock fitting that engages with a lock lever.