JPH0448082Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an interlock device for draw-out type equipment such as circuit breakers placed in closed switchboards and the like.

[Conventional technology]

Conventionally, manually operated pull-out type circuit breakers are provided with a mechanical interlock device to prevent the circuit breaker from being pulled out in the closed state and to be prevented from being inserted in the closed state. This mechanical interlock device has an interlock pin that protrudes from the bottom of the circuit breaker and is movable up and down, and lock holes into which the interlock pin is inserted are provided in the housing at the connection and disconnection positions of the circuit breaker. It is.

According to this configuration, the circuit breaker cannot be pulled out or inserted unless the interlock pin is placed in the raised position, that is, in a non-closing state.

If an electric drawer insertion device is installed, electrical interlock will be provided with the circuit breaker.

[Problem that the invention attempts to solve]

As mentioned above, when an electrically operated drawer/insertion device is provided, electrical interlock is provided, so mechanical interlock is unnecessary and becomes a nuisance. That is, since the interlock pin is used in a lowered state at all times, the interlock pin obstructs movement of the circuit breaker.

However, if the mechanical interlock device is removed and the electric drawer/insertion device is removed in response to a request for a change in the type of power distribution equipment, the mechanical interlock device must be reinstalled, making it very time-consuming to change the shape. It takes.

The purpose of this invention is to easily avoid interlock pins from getting in the way when mechanical interlocks are no longer needed due to the adoption of electrical interlocks associated with the installation of electrically operated drawer/insertion devices, etc. To provide an interlock device for a drawer-type device that can easily restore the interlock function when the drawer-insertion device is removed or the like.

[Means for solving problems]

The interlock device for drawer-type equipment of this invention is
In an interlock device for a drawer-type device, which has an interlock pin that protrudes from the bottom surface and is movable up and down, and cannot be inserted when the interlock pin is in a raised state,
A housing in which the drawer-type device is installed is provided with an elongated lock hole into which the interlock pin is inserted in a lowered state and allows movement of the interlock pin as the drawer-type device moves; The apparatus is characterized in that a movable locking member is provided which opens and closes a longitudinally intermediate portion of the shaped lock hole and holds the lock pin at the pull-out end or insertion end of the draw-out type device in the closed state. . Pull-out type devices having interlock pins include circuit breakers, switches, and the like.

[Effect]

According to the structure of this invention, the lock hole that engages the interlock pin is an elongated lock hole, and a movable lock member is provided to cover the longitudinally intermediate portion of the elongated lock hole so that it can be opened and closed. By opening the movable lock member, the interlock pin can move freely within the elongated lock hole. Therefore, when a mechanical interlock becomes unnecessary due to the adoption of an electrical interlock accompanying the installation of an electric drawer/insertion device, it is possible to avoid the interlock pin from interfering with the movement of the drawer-type device.
Also, when the movable lock member is in the closed state, the interlock pin is locked at the end of the elongated lock hole,
The drawer-type equipment can be fixed in the disconnected or connected position. In other words, a mechanical interlock function can be obtained. In this way, it is possible to easily deal with changes in formats that require or do not require a mechanical interlock by simply opening and closing the lock member.

〔Example〕

An embodiment of this invention will be explained based on FIGS. 1 to 5. This interlock device A for a drawer-type device engages an interlock pin 2 provided on a drawer-type device 1 shown by a chain line in FIG. 1 with a lock hole forming plate 4 of a housing 3. After explaining the outline of the closed switchboard 5 with reference to FIG. 2, the interlock device will be explained.

In FIG. 2, a drawer-type device 1 is composed of a gas circuit breaker or the like, and is arranged on a housing 3 of a closed switchboard 5 so that it can be pulled out and inserted using wheels 6. In the figure, the drawer-type device 1 is in the connection position, which is the insertion end, and can be pulled out to the disconnection position shown by the chain line. The drawer type device 1 has a movable contact 8 on the rear side.
and is connected to the disconnection section 9 of the housing 3.
10 is a secondary plug, and 11 is a front door of the closed switchboard 5.

Reference numeral 12 denotes an electric drawer insertion device, in which the rack 1 is driven forward and backward by a motor 13 via a speed reducer 14.
5. The tip of the rack 15 engages with an engaging portion 16 of the pull-out device 1. The case of the reducer 14 has the motor 13 attached to its side and supports the rack 15 so as to be movable forward and backward, and is installed on the mounting base 18 along with the motor control section 17. The mounting base 18 is attached to the housing 3 with bolts 19.
It is fixed at 28 is a stud for positioning the mounting base 18 provided on the housing 3.

In FIGS. 1 and 4, the interlock pin 2 of the interlock device A is provided so as to protrude below the drawer-type device 1 so as to be movable up and down.
The drawer type device 1 is constructed so that it cannot be inserted with the interlock pin 2 raised. The drawer type device 1 is provided with a lever (not shown) for operating the interlock pin 2 up and down.

The lock hole forming plate 4 is bolted to the upper surface of the housing 3, and is provided with an elongated lock hole 20 into which the interlock pin 2 is inserted in a lowered state. The elongated lock hole 20 has a length that allows the interlock pin 2 to move as the drawer type device 1 is inserted and moved. On the back surface of the lock hole forming plate 4, a plate-shaped movable locking member 21 that closes a longitudinally intermediate portion of the elongated lock hole 20 is attached to the elongated lock hole 20 in the longitudinal direction by a guide means (not shown). It is supported so that it can be opened and closed at right angles to the
It is biased in the closing direction by a spring member 22.
Also, a lock release lever 2 is provided on the lock hole forming plate 4.
3 is installed horizontally rotatably around the support shaft 24,
One end engages with movable locking member 21 through a pin 25 and a slot (not shown). When the electric drawer insertion device 12 is installed, the lock release lever 23 engages with the corner 18a of the mounting base 18.
The movable locking member 21 is held at an open angle as shown in FIG. In addition, in FIG. 1, 26 is a manual pull-out crank hole.

According to this configuration, when the electric drawer insertion device 12 is installed in the housing 3, the
As shown in FIG. 2, since the lock release lever 23 engages with the mounting base 18, the movable lock member 21 resists the spring member 22 and is held in the position using the elongated lock hole 20. Therefore, even if the interlock pin 2 protrudes from the bottom surface of the drawer-type device 1, the interlock pin 2 can freely move within the elongated lock hole 20, and the movement of the drawer-type device 1 is not hindered. The electric drawer insertion device 12 is attached to the mounting base 1
8 is attached to and detached from the housing 3. When attaching the lock release lever 23, the lock release lever 23 is manually rotated counterclockwise in FIG. As a result, the lock release lever 23 engages with the mounting base 18 due to the tensile force of the spring member 22.

When the electric drawer/insertion device 12 is removed, the lock release lever 23 is removed from the mounting base 18, so the movable lock member 21 advances due to the restoring force of the spring member 22, closing the middle part of the elongated lock hole 20 ( Figure 5B). In this state, by lowering the interlock pin 2 when the drawer-type device 1 is in the connected position and the disconnection position, the interlock pin 2 is stopped in the elongated lock hole 20 by the movable locking member 21, and the drawer-type device 1 is Fixed. That is, the drawer-type device 1 cannot be inserted into the drawer unless the interlock pin 2 is raised to disable insertion.

In this way, by simply opening and closing the locking member 21, it is possible to easily deal with changes in formats that require or do not require a mechanical interlock. Moreover, in this embodiment, since the lock release lever 23 and the spring member 22 are provided,
Even if the locking member 21 is not operated in particular, when the electric drawer insertion device 12 is installed, the lock release lever 23 always engages with the electric drawer insertion device 12 and the movable locking member 21 is opened. Further, when the electric drawer/insertion device 12 is removed, the lock member 21 is always closed by the restoring force of the spring member 22. Therefore, there is no mistake in opening and closing the movable lock member 21, and the work involved in attaching and detaching the electric drawer/insertion device 12 is simple.

Furthermore, according to this interlock device for a drawer-type device, the drawer-type device 1 itself can be used without any modification to the conventional drawer-type device 1 itself.

[Effect of idea]

The interlock device for drawer-type equipment of this invention is
The lock hole that engages the interlock pin is an elongated lock hole, and a movable lock member is provided to open and close the longitudinally intermediate portion of the elongated lock hole, so that the movable lock member can be opened. This allows the interlock pin to move freely within the elongated lock hole. Therefore, when a mechanical interlock becomes unnecessary due to the adoption of an electrical interlock accompanying the installation of an electric drawer/insertion device, it is possible to avoid the interlock pin from interfering with the movement of the drawer-type device. Furthermore, when the movable lock member is in the closed state, the interlock pin can be locked at the end of the elongated lock hole, and the drawer-type device can be fixed in the disconnected position or the connected position. In other words, a mechanical interlock function can be obtained. In this way, there is an effect that it is possible to easily deal with changes in formats that require or do not require a mechanical interlock simply by opening and closing the lock member.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of this invention, Fig. 2 is a partially cutaway side view of a closed switchboard equipped with a circuit breaker interlock device, Fig. 3 is a partially enlarged side view thereof, and Fig. 4 is Similarly, FIGS. 5A and 5B are cross-sectional views of essential parts of the interlock device, and FIGS. 5A and 5B are diagrams illustrating its operation. 1...Drawer type device, 2...Interlock pin,
3...Housing, 4...Lock hole forming plate, 5...
...Closed switchboard, 12...Electric drawer insertion device, 20
...Elongated lock hole, 21...Movable lock member,
22... Spring member, 23... Lock release lever,
A...Interlock device.

Claims (1)

[Claims for Utility Model Registration] (1) In an interlock device for a drawer-type device, which has an interlock pin that protrudes from the bottom surface and is movable up and down, and cannot be inserted when the interlock pin is in a raised state, the interlock pin is providing a housing in which the drawer-type device is installed with an elongated lock hole that is inserted in a lowered state and allows the interlock pin to move as the drawer-type device moves;
Further, a movable locking member is provided which opens and closes a longitudinally intermediate portion of the elongated lock hole and holds the lock pin at the pull-out end or the insertion end of the draw-out type device in the closed state. Interlock device for pull-out equipment. (2) A spring member that biases the movable lock member in the closing direction and a lock release lever that moves the movable lock member in the open direction are provided, and the lock release lever is adapted to be used in the electric drawer insertion device of the drawer type device. An interlock device for a drawer-type device according to claim (1), which is a registered utility model and is engaged with the electric drawer insertion device and held in the unlocked position when the device is installed in the housing.