JPS61269814A - Operation handle lock for electric switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an operating/permanent locking device designed to prohibit operation of an operating handle of an electric switch.

[Conventional technology]

Conventionally, this type of operating handle locking device has been used, for example, in a circuit breaker, and is configured as shown in FIGS. 5 to 7. FIG. 5 is a partially cutaway side view thereof, FIG. 6 is a perspective view of FIG. 5, and FIG. 7 is an exploded perspective view of the operating handle and handle cap. In FIGS. 5 to 7, (1) is a base made of molded insulating material, that is, the first t
The body, C) rests on this base (1) and is made of molded insulating material and has an opening (2a) and an inner wall (2a) of this opening (2a).
2b), the cover or second housing (3) passes through the opening (2a) of this cover (2) and
2) has a knob part (3a) that can be operated from the outside, and a through hole (3b) in this knob part (3a), and is made of molded insulating material.
3) is mounted and the /X handle arm of the opening/closing mechanism is linked to the operating handle (3), (5) is the operating handle (
3) is a handle cap that fits into the handle cap, and one end of it has a
The knob portion (3a) of the operating handle (3) forms a substantially U-shaped fitting portion (5a) that is fitted in a similar manner, and a pair of through holes (5b) are formed in parallel portions of the fitting portion (5a). is drilled,
The other end has a blocking portion (5o) bent into an abbreviated shape. (6) is a locking member such as a padlock, and the handle cap (5) fitted to the operating handle (3) is
The through hole (3b) of the operating handle (3) is
) and is inserted into the through hole (5b) of the nozzle cap (5) and locked.

Next, the operation of the conventional operation handle locking device will be explained.

In FIG. 5, when the operating handle (3) is tilted to the ON position (tilted to the right) without the handle cap (5) being fitted onto the operating handle (3), the handle arm (4) is interlocked with the opening/closing mechanism ( A pair of electrical contacts (not shown) are turned on via the contactor (not shown). Next, turn the operating handle (3)
When tilted to the FFF position (leaning to the left), the knob arm (4) interlocks and opens a pair of electrical contacts (
(not shown) is turned off. However, when the operating handle (3) is turned on.

There are cases where it is desired to prohibit the OFF operation. For example, when doing electrical work on the load side, you want to keep it in the "OF" position to ensure the safety of workers, and if you need continuous power supply like a computer, make sure it is turned on. You want to keep it in position.If this is the case, use the operation handle (3)
Depending on whether you want to hold the handle cap (5) in the ON or OFF position, fit the handle cap (5) to the knob (3a) of the operating handle (3a) in either the left or right direction as shown in FIG. ) and the locking member (6) is inserted into the through holes (3b) and (5b) of the handle cap (5) and locked. FIGS. 5 and 6 show the case where it is desired to hold the switch in the OFF position. In this state, the handle cap (
The blocking IJIs (5Q) of 5) are on the inner wall of the cover (2) (
2b), thus prohibiting the operation of the operating handle (3). In the states shown in FIGS. 5 and 6, the operating handle 0) cannot be tilted to the ON position (tilted to the right), so opening of the electric contact is prohibited. Next, with the operating handle (3) tilted to the ONN position (tilted to the right), lock the operating handle (3) as described above to turn off the electrical contact.
' will be prohibited.

[Problem that the invention seeks to solve]

However, the operating handle locking device used in conventional circuit breakers has to be made into a special specification due to intermittent orders from customers, and the standard circuit breaker has been specially modified into a special product with an operating handle locking device. Was. That is, after removing the cover ○) from the base (1) and detaching the operating handle (3) from the handle arm (4), the operating handle (3) is removed.
A modification work was being carried out to drill a through hole (3b) in the knob part (3a). Therefore, there are problems in that it is time-consuming and expensive to manufacture, and that when the cover (2) is removed from the base (1), dust and foreign matter get inside the circuit breaker, resulting in a lack of reliability. Ta. In order to solve this problem, if the through holes (3b) are drilled in all the operation handles (3) of the standard circuit breaker, the mold and molding process for the operation handles (3) will be complicated. Therefore, there were problems such as an increase in the price of a standard circuit breaker without an operation handle locking device.

This invention was made in order to solve the problems of the conventional ones as described above, and it is possible to move the operating handle to the ON position or to the O position without any processing on the knob of the operating handle.
An object of the present invention is to provide an operating handle locking device for an electric switch that can be held in the FF position.

[Means for solving problems]

The operating handle locking device for an electric switch according to the present invention includes a lock plate that prevents the operating handle from moving between an ON position and an OFF position, and a lock plate that is fixed to the electric switch and that pivots the lock plate. A locking member holds the lock plate in a locked position with respect to the operating handle with respect to the support plate.

[Effect]

In this invention, when the lock plate is held at the operating handle lock position, the lock plate prevents the operating handle from moving between the ON position and the OFF position.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a partially cutaway side view, FIG. 2 is a perspective view of FIG. 1, FIG. 3 is an exploded perspective view of the lock plate and support plate in the embodiment shown in FIGS. 1 and 2, and FIG. FIG. 7 is a perspective view showing a state in which the operating handle is locked in a position different from that in FIG. 2; the same parts as in FIGS. 5 to 7 are given the same reference numerals, and their explanations will be omitted.

In the figure, (7) is a lock plate, which has a first opening (7a) through which the knob (3a) of the operation handle (3) is in the ON position, and a second opening (7a) through which the knob (3a) of the operating handle (3) is in the OFF position. opening (7b), and a blocking part (located between the first opening (7a) and the second opening (7b) that prevents the operation handle (3) from moving from one of these openings to the other. 7o). (8) is a support plate that supports the lock plate (7), and a tightening member (9) such as a screw or rivet is attached to the cover (2) of the circuit breaker.
1, and a rising portion (8b) rising from the cover (2).

The lock plate (7) has a rising portion (7d) opposite to the rising portion (9b) of the support plate (8), and one end of this rising portion (7d) is attached to the support plate (8) by a pivot (1o). ) is pivotally supported on the rising portion (8b) of. The lock plates (7) are aligned with each other when the lock plates (7) are in the operating handle lock position (Fig. 1) in which the operating handle is passed through the first opening (7a) or the second opening (7b). ) and the support plate (8) have openings (7e) and (80) formed in the opposing rising parts (7d) and (8b), respectively, through which the locking member (6) is inserted.

The locking plate (7) is further provided with a cover portion (7f) which covers the clamping member (9) when it is in the locking position of the operating handle.

When it is desired to lock the operating handle (3) in the OFF position, the knob (3a) of the operating handle (3) is inserted through the second opening (7b) of the lock plate (7) as shown in FIG. to open the locking member (6) (7e),
(8o) is inserted. This allows the operation handle (3)
cannot be moved to the ON position by the blocking portion (7c) of the lock plate (7). In addition, since the lock plate (7) is locked with respect to the support plate (8) by the locking member (6), it will not move from the operating handle lock position shown, and the operating handle (3) will surely be in the OFF position. locked. At this time, since the cover portion (7f) of the lock plate (7) covers the tightening member (9), it will not be removed by mistake. If you want to lock the operating handle (3) in the ON position, insert the knob (3a) into the first opening (7a) of the lock plate (7) as shown in Figure 4.
It would be better if it penetrated.

In addition, in the above embodiment, the openings (7e) and (8o) are elongated, but this allows a plurality of locking members to be inserted through the openings (7e) and (8o).
Different workers each have a key, and the lock cannot be unlocked unless multiple workers are present to ensure the lock is secure, but the openings (7e) and (8a) have a single lock. A member may be inserted therethrough.

Further, although the openings (7e) and (8o) are shown as being closed all around, either one of them may be open, for example, at its left end as seen in FIG. Furthermore, there is no problem even if the openings (7a) and (7b) are open at the front portions as seen in FIG. Furthermore,
Although the above embodiments have been shown regarding circuit breakers, O, N,
The invention is equally applicable to other electrical switches, such as switches having an OF'P position.

〔Effect of the invention〕

As described above, according to the present invention, since the operating handle is locked in the ON position or OFF position by the lock plate, there is no need to perform equivalent processing on the operating handle, and the effort and expense required for such processing are eliminated. Since there is no need to disassemble the electrical switch for such processing, there is an advantage that dust and foreign matter will not enter the electrical switch and reduce its reliability.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a circuit breaker equipped with an embodiment of the present invention, FIG. 2 is a perspective view of FIG. 1, and FIG.
Figure 4 is an exploded perspective view of the lock plate and support plate in the embodiment shown in Figures 2 and 2, Figure 4 is a perspective view showing the operation handle locked in a position different from Figure 2, and Figure 5 is a conventional operation handle. A partially cutaway side view of a circuit breaker equipped with a locking device, FIG. 6 is a perspective view of FIG. 5, and FIG. 7 is an exploded perspective view of the operating handle and handle cap of the circuit breaker of FIGS. 5 and 6. It is a diagram. In the figure, (3) is the operating handle, (6) is the locking member, (7) is the lock plate, (7a) is the first opening, (
7b) is the second opening, (7c) is the blocking part, (7e) is the locking member penetration opening, (7f) is the cover part, (8) is the support plate, (8a) is the fixed part, and (8b) is the Rising part, (8o
) is a locking member penetration opening, and (9) is a tightening member. In addition, the same reference numerals in each figure indicate the same or equivalent parts. Agent: Masuo Oiwa, Patent Attorney Figure 1, Figure 9, Ikuo Tsuki, Figure 2, Figure 3, Figure 5

Claims (2)

[Claims] (1) An operating handle locking device for holding the operating handle in the ON position or the OFF position in an electric switch having an operating handle that can be switched between an ON position and an OFF position, A first opening to be penetrated when in the OFF position, a second opening to be penetrated when in the OFF position, and between the first opening and the second opening, the operating handle moves from one of these openings to the other. a locking plate having a blocking portion for preventing the electrical switch from moving; a locking plate having a fixing portion fixed to the electrical switch; and a rising portion rising from the electrical switch; the locking plate being pivoted to the rising portion; a support plate, the support plate and the lock plate having opposing portions aligned with each other when the lock plate is in a locking position of the operation handle in which the operation handle is passed through the first or second opening; An operating handle lock for an electric switch, characterized in that a locking member insertion opening is formed, and the locking plate is held at the operating handle lock position by inserting the locking member into the locking member insertion opening. Device. (2) The operating handle locking device for an electric switch according to claim 1, wherein the lock plate has a cover portion that covers the tightening member that fixes the support plate to the electric switch when the lock plate is in the operating handle lock position. .