JPH0334010Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a mechanical interlock device for electrical switches, and in particular, the invention relates to a mechanical interlock device for electrical switches. This invention relates to a mechanical interlock device for electrical switches that prevents all other electrical switches from closing when only one electrical switch is closed.

[Prior Art] Conventionally, an interlock device for an electric switch that can only close one of two electric switches arranged in parallel is shown in FIGS. 7 and 8. things are used.

FIG. 7 is a side view of a main part of a conventional electric switch interlock device, and FIG. 8 is a front view of the same.

First, a conventional electrical switch interlock device will be described with reference to FIGS. 7 and 8. In FIGS. 7 and 8, circuit breakers or electrical switches 1, 1' each having a closing jacket made of molded insulation are arranged in parallel. A fixed contact 3 having a fixed contact 2 and a movable contact 5 having a movable contact 4 at one end thereof facing the fixed contact 2 are provided within the closed envelope. The movable contactor 5 is rotated about a rotation shaft 7 via an opening/closing mechanism (not shown) by operating an operation handle 6 protruding from the front side to an on or off position.
The movable contact 4 is configured to come into contact with and separate from the fixed contact 2.

The two electric switches 1, 1' are mounted with their respective back sides on the planes of the switch mounting plates 8, 8' so that there is no difference in dimension between the mounting surfaces. The interlock device 9 is mounted on a substrate 10 made of an insulator. A lock lever support 12 is fixed to the substrate 10 via a pedestal 11. This lock lever support base 12 has a shaft 1 at the center of the lock lever 13.
4, it is rotatably supported. lock lever 1
The base ends of locking rods 15, 15' made of an insulating material are attached to both ends of the electric switch 1, so as to pass through the board 10.
1' is inserted into the through hole in the rear wall of the electrical switch 1', and the board 10 is mounted across the rear walls of the two electrical switches 1 and 1' so that each tip corresponds to the movable contact 5. Ru.

In this way, by equipping the two electrical switches 1 and 1' with the interlock device 9, as shown in FIG. Push down the tip of 15'. Then, the lock lever 13 is rotated counterclockwise about the shaft 14 and pushes up the tip of the lock rod 15, so that even if the electric switch 1 is closed, the movable contact 5 does not reach the closed position. The movable contact 5 contacts the tip of the locking rod 15.
operation to the on position is blocked, making it impossible to turn on the battery.

Therefore, the two electric switches 1 and 1' cannot be turned on at the same time, and if either electric switch 1 or 1' is also off, it is possible to turn on one of the electric switches. Become.

[Problems to be solved by the invention] As mentioned above, the conventional interlock device
The lever movement of the lock lever 13 prevents the other electric switch from closing when one of the two electric switches 1 and 1' is in the closed state. , electric switch is 2
It is limited to the table. Therefore, if three or more electrical switches are arranged in parallel, any one
This method has the disadvantage that it cannot be applied to devices that prevent all other electrical switches from closing when one electric switch is closed.

Therefore, the main purpose of this invention is that even if at least two or more electrical switches are arranged in parallel, if one of them is in the closed state, all other electrical switches are closed. It is an object of the present invention to provide a mechanical interlock device for an electrical switch configured to be able to prevent interlocking.

[Means for Solving the Problems] The interlock device for an electric switch according to this invention has a movable contact device built inside the closure jacket, and an operating handle that protrudes from the front side of the closure jacket. equipped with at least two electrical switches arranged in parallel, one end of which corresponds to the movable contact device of the electrical switch, and a switch that moves in the opening/closing direction of the movable contact device according to the opening/closing of the electrical switch. A locking rod that can move forward and backward, a latching member that includes a pair of left and right rollers provided to correspond to the other end of the locking rod, and a guide means that opens and closes the rollers in a direction intersecting the direction of movement of the locking rod. An interlocking link that connects a roller on one side corresponding to each of the electric switches and a roller on the proximal side of the adjacent electric switch, and an interlocking link that connects the rollers on one side corresponding to each of the electric switches and the roller on the proximal side of the adjacent electric switch, and It is configured to include a roller corresponding to the electric switch disposed at the outer end, and a pair of spring members provided so as to press an interlocking link connected to this roller.

[Function] The mechanical interlock device for electrical switches according to this invention is capable of interlocking when any one of at least two electrical switches arranged in parallel is turned on. When the locking rod is inserted between the pair of rollers of the locking member, the other rollers that move in conjunction with the roller into which the locking rod is inserted are guided by the guide means and are displaced, so that the locking rod and the corresponding locking rod are displaced. By causing a positional shift between the two rollers, the corresponding locking rod is prohibited from being inserted between the corresponding rollers, thereby preventing the closing of other electric switches.

[Embodiment of the invention] Figures 1 to 4 show an embodiment of the invention, in particular, Figure 1 shows a front view, Figure 2 shows a bottom view, and Figure 3 shows an example of the invention. 4 shows a side view, and FIG. 4 is a front view showing a state in which none of the electric switches are turned on.

First, the configuration of one embodiment of this invention will be described with reference to FIGS. 1 to 4. The electrical switches 21a, 21b, 21c are each provided with a closure jacket made of molded insulation and are arranged in parallel. These electrical switches 21a, 21b, 21c
Of course, it can also be a circuit breaker.
A fixed contact device 2 with a fixed contact 22 is provided in the closing jacket of each electric switch 21a, 21b, 21c.
3, and a movable contact device 25 having a movable contact 24 at one end thereof is provided so as to face the fixed contact 22. The movable contact device 25 is a third
As shown in the figure, by operating the operating handle 26 protruding from the front side of the closure jacket to the ON or OFF position, it is rotated about the rotation shaft 27 via the opening/closing mechanism (not shown). The movable contact 24 is configured to come into contact with and separate from the fixed contact 22.

The three electrical switches 21a, 21b, 21c are
Each back side has a switch mounting member (not shown)
It is mounted on a flat surface so that there is no dimensional difference between the mounting surfaces. The interlock device is attached to a base frame member 28, and the base frame member 28 is provided over all the rear sides of the electrical switches 21a, 21b, and 21c arranged in parallel. Note that this base frame member 28 may be attached to the back surface of the electric switches 21a, 21b, and 21c, or may be attached to another fixed frame member.

A locking rod 29 made of an insulator corresponding to the movable contact device 25 is attached to the base frame member 28 .
That is, the locking rod 29 is connected to each electric switch 21a,
It is inserted through the through hole on the back side of each of 21b and 21c, and is provided so that one end thereof comes into contact with the movable contact device 25. Each locking rod 29 is provided with a spring mounting portion 29a projecting in the shape of a flange at the center thereof. The other end of the locking rod 29 is provided so as to correspond to a pair of left and right rollers 33a, 33'a that serve as a latching member 31, and a return spring 3 is provided on the other end of the locking rod 29.
0 is provided between the base frame member 28 and the spring hanging portion 29a. The return spring 30 constantly displaces the locking rod 29 in the direction of the movable contact device 25.

A pair of rollers 33a, 3 serving as the latching member 31
3'a is attached to one end of a pair of symmetrical levers 33, 33' so as to correspond to each locking rod 29, and the other end of the lever 33, 33' is attached to a shaft 34,
It is rotatably supported by a support member 32 attached to the base frame member 28 through 34'. Lever 33,3
3' is a locking rod 2 that locks a pair of rollers 33a and 33'a.
It is guided to open and close in a direction that intersects the forward and backward direction of 9.

Electric switches 21a, 21 arranged in parallel
At b and 21c, a roller 33'a corresponding to the locking rod 29 of the electric switch 21a and a roller 33a corresponding to the locking rod 29 of the electric switch 21b are connected by an interlocking link 35a. Further, a roller 33'a corresponding to the locking lever 29 of the electric switch 21b and a roller 33a corresponding to the locking lever 29 of the electric switch 21c are connected by an interlocking link 35b.

One electric switch 21a located at the outermost side
A spring 36a is provided between the roller 33a corresponding to the locking lever 29 of the other electric switch 21c and the fixing member 37, and a spring 36a is provided between the roller 33'a corresponding to the locking lever 29 of the other electric switch 21c and the fixing member 37. Haspring 36
b is provided. These springs 36a, 36b press the rows of rollers 33a, 33'a and interlocking links 35a, 35b corresponding to the locking rods of the electrical switches 21a, 21b, 21c,
Normally, each roller 33a, 33'a is configured to be in closed contact.

That is, the electrical switches 21 arranged in parallel
rollers 33a, 33'a corresponding to the respective locking rods 29 of a, 21b, 21c;
The adjacent rollers of adjacent electric switches are connected by interlocking links 35a, 35b, and each roller 33a, 33'a and interlocking link 35a,
A pair of left and right springs 36a, 36b are provided between the roller located at the outermost end of all the rollers and the fixed member 37 so as to press the row of springs 36a, 35b. 36b so that each pair of rollers are always in closed contact.

In the electrical switch mechanical interlock device configured as described above, the electrical switches 21a, 2
1b, 21c are all in the OFF state, as shown in FIG. 3
It corresponds to the closed connection part 3'a. Due to this condition,
When the electric switch 21b is turned on, the movable contact device 25 of the electric switch 21b is rotated to the closing position, and the locking rod 29 is pressed, as shown in FIGS. 1 and 2. rollers 33, 33'
Push open the space between a. And rollers 33a, 3
3'a respectively displace the locking rod 29 in opposite directions in a direction intersecting the advance/retreating direction by the guide means of the lock levers 33 and 33', and the locking rod 29
9 is smoothly inserted between the rollers 33a and 33'a.

The locking rod 29 of the electric switch 21b is the roller 33
When inserted between a and 33'a, this roller 3
Interlocking link 35a connected to 3a, 33'a,
35b is a pair of rollers 33a, 33' corresponding to the locking rods 29 of the other electric switches 21a, 21c.
a are integrally displaced, and the closed contact portions of each pair of rollers are moved to a position offset from each locking rod 29. As a result, even if the electric switches 21a and 21c are turned on, one end of the locking rod 29 pressed by the movable contact device 25 is inserted between the misaligned pairs of rollers 33a and 33'a. The other end of the locking rod 29 prevents the movable contact device 25 from moving into the closed position.

Figures 5 and 6 are diagrams showing other embodiments of this invention. In particular, Figure 5 shows a partial breakage when one of the electrical switches arranged in parallel is turned on. A front view of the main part is shown, and FIG. 6 is a side view of the main part.

The embodiment shown in FIGS. 5 and 6 is the same as the embodiment shown in FIGS. 1 to 4 described above except for the following points. That is, locking rod 29
The spring hanging portion 29a is provided with both wing portions 29b that protrude from both side walls of the base frame member 28 from the center portion. Return springs 30 are provided between both wing portions 29b and a spring mounting plate 41 attached to the bottom surface of the base frame member 28, respectively. Also,
Lock rod 2 of electric switches 21a, 21b, 21c
Each roller 33 serving as a latching member corresponds to 9.
Among the rollers a and 33'a, interlocking links 35a and 35 are connected between rollers on the proximal side of adjacent electrical switches, respectively.
connected by b. Of all the rollers,
The roller 33a corresponding to the outermost electric switch 21a and the roller 33'a corresponding to the other electric switch 21c are connected to links 35c and 33'a, respectively.
It is attached to one end of 35d. Link 35c, 3
Springs 36a, 36b are installed between the other end of 5d and the fixing pin 42 attached to the base frame member 28 so as to press the respective rollers 33a, 33'a and the rows of interlocking links 35a, 35b. There is.

That is, a pair of left and right springs 36a and 36b are provided for the roller located at the outermost end,
Normally, one pair of rollers 33a, 3 are provided, corresponding to the locking rods 29 of each electric switch 21a, 21b, 21c.
3'a are provided so as to be in closed contact. moreover,
Each roller 33a, 33'a, each interlocking link 35a, 35b, and each link 35c, 35d is a base frame member to which each roller shaft 43 is fixed so as to be movable in a direction intersecting the advancing and retreating direction of the locking rod 29. It is loosely fitted and supported in a long groove hole 44 formed in 28. Each pair of rollers 33 is
a, 33'a are constructed so that they can be opened and closed. Even if configured in this way, it does not depart from the spirit of the present application.

[Effects of the invention] As described above, according to this invention, a pair of rollers of a locking rod and a latching member, an interlocking link connecting each roller, and a row of each roller and each interlocking link are pressed. With a simple configuration of a spring and a guide means for displacing, it is possible to easily install two or more electrical switches by simply adding or subtracting the same parts depending on the number of electrical switches arranged in parallel. It can be applied to any mechanical interlock device of the device.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of this invention.
FIG. 2 is also a bottom view. FIG. 3 is also a side view. FIG. 4 is a front view showing a state in which none of the electric switches are turned on. FIG. 5 is a partially cutaway front view of the main parts when one of the electric switches in another embodiment of the invention is turned on. FIG. 6 is also a side view of the main part. FIG. 7 is a side view of a main part of a conventional electric switch interlock device. FIG. 8 is also a front view. In the figure, 21a, 21b, 21c are electric switches, 22 is a fixed contact, 23 is a fixed contact device,
24 is a movable contact, 25 is a movable contactor device, 26 is an operating handle, 27 is a rotating shaft, 28 is a base frame member,
29 is a locking rod, 29a is a spring mounting part, 3
1 is a latching member, 33a, 33'a are rollers, 3
5a, 35b are interlocking links, 35c, 35d are links, 36a, 36b are springs, 37 is a fixed member,
41 is a spring mounting plate, 42 is a fixing pin, 43
indicates a roller shaft, and 44 indicates a long slot.

Claims (1)

[Claims for Utility Model Registration] (1) A movable contact device is built into the interior of the closure jacket, and is provided with an operation handle protruding from the front side of the closure jacket, and at least two or more units are arranged in parallel. an electrical switch that penetrates the back wall of the closure envelope, one end of which corresponds to a movable contact device of the electrical switch, and the opening and closing directions of the movable contact device according to the opening and closing of the electrical switch; a locking rod that is movable forward and backward; a latching member including a pair of left and right rollers provided corresponding to the other end of the locking rod; and opening and closing of the roller in a direction intersecting the direction of movement of the locking rod. a guide means; an interlocking link connecting between a roller on one side corresponding to each of the electric switches and a roller on the proximal side of an adjacent electric switch; and an interlocking link corresponding to the at least two or more electric switches. of the rollers disposed at both outer ends, and a pair of spring members provided to press interlocking links connected to the rollers; When one of the electric switches is turned on and the locking rod corresponding to this electric switch is inserted between the pair of rollers of the latching member, the other rollers interlocked with the roller into which the locking rod is inserted are activated. The lock rod is guided by the guide means and displaced to cause a positional shift between the lock rod and the corresponding lock rod, thereby prohibiting the lock rod from being inserted between the corresponding rollers and preventing the closing of other electrical switches. A mechanical interlock device for an electrical switch, characterized in that: (2) The mechanical interlock device for an electric switch according to claim 1, wherein the guide means for each roller includes a lever rotatably supported by a fixed shaft. (3) The utility model according to claim 1, wherein each of the switches is attached to a base frame member, and the guide means for each roller is formed by a long slot formed in the base frame member. Mechanical interlock device for electrical switchgear.