JPH10108324A - Interlock device for drawer type equipment - Google Patents

Abstract

(57) [Problem] To reduce the number of parts of an interlock device and eliminate the need for adjusting a limit switch. A handle portion for manually driving a lock bar up and down, a lock portion for stopping the raising of the lock bar when the opening and closing device is closed, and a lock when the opening and closing device is opened. The pressing portion 25 that presses the roller 20A of the limit switch in conjunction with the raising of the bar 19 is formed by processing one plate, and this plate is attached to the lock bar 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for interlocking a drawer-type device which is mounted on a truck and which is put in and out of a switchboard so that the truck does not move at a drawer position and an operating position. And an interlock device having a small number of parts.

[0002]

2. Description of the Related Art FIG. 3 is a side view showing the structure of a drawer type device. The cradle 3 is fixed in a switchboard (not shown), and the carriage 2 moves on the cradle 3 in the left-right direction. On the dolly 2, a switching device 1 such as a vacuum circuit breaker
Is mounted, and the main circuit terminal 5 on the switchboard side is connected via the contact 4.
It is connected to the. Generally, a plurality of draw-out devices having the configuration shown in FIG. 3 are provided, and are stacked vertically in a switchboard. FIG. 3 shows a state in which the drawer-type device is in the operating position, and the contact 4 and the main circuit terminal 5 are disconnected by pulling out the cart 2 to the left. A main circuit (not shown) is wired inside the cradle 3, and an interlock device of a drawer type device is provided at a portion A in FIG.

FIG. 4 is a side view showing the structure of a conventional drawer-type interlock device. A lock plate 7 is attached to the cradle 3 via a support 3A, and lock holes 7A and 7B are formed in the lock plate 7. Lock rod 8
Is vertically movably supported by the bogie frame 2A, and a lower portion 8A of the lock rod 8 has a bogie hole 2B penetrating the bogie 2;
It is fitted into the lock hole 7B. A pressing portion 10 is attached to an upper portion of the lock bar 8, and an upper surface of the pressing portion 10 faces an operation button 9 </ b> A of the limit switch 9.
The right end of the handle 11 is connected to the lock rod 8 via the pin 12B.
The handle 11 is rotatably supported by a pin 12A passing through a support 12 fixed on the carriage 2. A tension spring 14 is interposed between the right side of the handle 11 and the carriage 2 and constantly urges the lock rod 8 downward. Further, a locking portion 13 is attached in the middle of the lock rod 8, and the upper surface of the locking portion 13 is in contact with the opening / closing lever 6. The opening / closing lever 6 is integral with the opening / closing shaft 27. The opening / closing shaft 27 is used to open / close a switching device (not shown) and is connected to a movable contact of the switching device.

In general, drawer-type devices require the following interlocks. In the operating position, the in / out operation cannot be performed with the switchgear closed. The closing operation of the switchgear shall not be possible at the middle of the loading / unloading. At the drawer position, the opening / closing operation cannot be performed with the switchgear closed. Next, the fact that the apparatus of FIG. 4 has the above three interlocks will be described. FIG. 4 shows a configuration in which the draw-out type device is in the operating position and the built-in switchgear (not shown) is in a closed state. In this state, the lock rod 8
Since the lower end portion 8A is fitted in the lock hole 7B, the carriage 2 cannot be pulled out to the left (interlock). In addition, since the lock portion 13 is in contact with the opening / closing lever 6, the interlock cannot be released by raising the lock rod 8. When the opening / closing device is opened, the opening / closing lever 6 is at the position of 6A. When the left end of the handle 11 is manually raised, the lock bar 8 is also raised via the pin 12B.
At this time, the lock portion 13 comes to the position of 13A, but does not become an obstacle because the opening / closing lever 6 is at the position of 6A. Further, since the lock rod 8 rises, the lower end 8A of the lock rod 8 comes out of the lock hole 7B. Therefore, it becomes possible to pull out the cart 2 to the left. Further, the pressing portion 10 is moved to the position 1
0A and the operation button 9 of the limit switch 9
Press A. Operation button 9A of limit switch 9
The opening and closing device is not electrically closed by being pressed. Therefore, while the bogie 2 is being pulled out to the left, the opening / closing device cannot be operated for closing (interlock).

The cart 2 is pulled out to the left and the handle 1
When 1 is left free, the lower end 8A of the lock rod 8 fits into the lock hole 7A at the lock hole 7A.
The lock rod 8 remains moved downward by the force of the spring 14. In the withdrawn state, the limit switch 9
Since the operation button 9A is opened, a test for electrically opening and closing the switchgear can be performed. However, when the opening / closing device is closed and the opening / closing lever 6 is at the position indicated by the solid line, the locking portion 13 is in contact with the opening / closing lever 6, so that
The interlock cannot be released by raising the lock rod 8. Since the lower end 8A of the lock rod 8 is still fitted in the lock hole 7A, the cart 2 cannot be pushed rightward (interlock).

To return the drawer to the operating position, the opening / closing lever 6 is raised to the position 6A when the opening / closing device is opened. Thereafter, if the lock bar 8 is raised by manually raising the left end of the handle 11, the lower end 8A of the lock bar 8 comes out of the lock hole 7A. With this, the trolley 2 can be pushed rightward.
Since the operation button 9A of the limit switch 9 is kept pressed in the same manner as in the case of pulling out, the opening / closing device cannot be closed (interlock).
When the truck 2 reaches the position in the driving state, the lower end 8A of the lock rod 8 fits into the lock hole 7B. In the driving state, the operation button 9A of the limit switch 9 is released,
The switching device can be electrically opened and closed.

[0007]

However, the conventional apparatus as described above has a problem that the number of parts is large and that it takes time to mount and adjust the parts. That is, as shown in FIG.
And the three parts of the lock unit 13 need to be attached. For this reason, it took time to mount each component. Further, it is necessary to accurately adjust the operation button 9A of the limit switch 9 to the position where the lock bar 8 is raised. That is, if the pressing amount of the operation button 9A is insufficient,
If the limit switch 9 does not operate and the operation button 9A is pressed too much, the limit switch 9 is broken. Therefore, it took time to adjust the limit switch.

An object of the present invention is to reduce the number of parts of an interlock device and to eliminate the need to adjust the position at which a limit switch is mounted.

[0009]

According to the present invention, in order to attain the above object, according to the present invention, a switchgear is mounted on a truck and a drawer device which is put in and taken out of a switchboard is moved at a drawer position and an operating position. A lock rod slidable up and down, pierced through a bogie hole provided in the bogie, and urged downward by a spring; and a switchgear in an open state when pressed. A limit switch for electrically closing the lock bar, a handle for manually driving the lock bar upward, and a lock unit for stopping the lift of the lock bar when the opening / closing device is in the closed state, A pressing portion that presses the limit switch in conjunction with the raising of the lock bar when the opening / closing device is opened, and a lock hole into which the lower end of the lock bar is inserted when the drawer device is pulled out and in the operating position. In an interlock device of a draw-out type device configured by a lock plate fixed to a fixing member, a grip portion, a lock portion, and a pressing portion are formed by processing a single plate material, and the plate material is locked. It should be attached to a rod. As a result, the handle, the locking portion, and the pressing portion are constituted by one component.

[0010] In this configuration, a switch lever with a roller for pressing the limit switch is provided, and the switch lever is disposed inclined with respect to the vertical direction, and an end of the pressing portion is the same as the switch lever. The limit switch may be bent by being bent in the inclined direction, and the inclined surface of the pressing portion pressing the roller of the switch lever as the lock rod rises. As a result, the pressing amount of the roller becomes constant, and it becomes unnecessary to accurately adjust the mounting position of the limit switch.

In this configuration, a support provided with a guide hole through which the lock rod penetrates may be provided at a lower portion of the bogie, and the size of the guide hole and the size of the bogie hole may be different from each other. Thereby, the play of the lock bar is eliminated, and the lock bar moves up and down smoothly.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. FIG. 1 is a sectional view showing a configuration of an interlock device of a drawer-type device according to an embodiment of the present invention;
FIG. 2 is a view as seen from the arrow B in FIG. In FIG. 1, a lock plate 7 is attached to the cradle 3 via a support 3A,
The lock plate 7 is provided with lock holes 7A and 7B, the open / close lever 27 is integrated with the open / close shaft 27, and the lock bar 19 is supported by the bogie frame 2A so as to be freely movable up and down. Are inserted into both the lock hole 7B and the bogie hole 2B in the same manner as in the prior art. The configuration different from the conventional one is as follows.

Referring to FIG. 1, a support 1 is
The support 18 has a guide hole 17 through which the lock rod 8 passes. A pin 16 penetrates through the lock bar 19, and a compressive spring 15 is interposed between the pin 16 and the lower surface of the bogie 2, and the lock bar 19 is constantly urged downward. On the upper part of the lock bar 19, a push button switch 21 for electrically shutting off the opening / closing device is provided.
It is attached to the bogie frame 2A via a support 21A. Handle part 23, lock part 22, pressing part 25 and connecting part 2
4 are formed by processing from a single plate material. That is, the connecting portion 24 is formed by bending, and is bolted to the lock bar 19. Handle part 2
3 is formed by pressing a plate so as to protrude leftward, and the lock bar 19 can be raised by manually lifting the left end of the handle portion 23.

In FIG. 2, the lock portion 22 is formed by bending a plate at a right angle, and the upper end surface of the lock portion 22 is in contact with the opening / closing lever 6. On the other hand, limit switch 2
Numeral 0 is attached to the bogie frame 2A via supports 26 so as to be inclined with respect to up and down. The pressing portion 25
The end is the switch lever 20 of the limit switch 20.
B is bent in the inclination direction. Further, the pressing portion 2
5 is a roller 20 at the tip of the switch lever 20B.
It comes into contact with A.

Next, the interlock mechanism in FIG. 1 will be described. FIG. 1 shows a configuration in which the drawer type device is in the operating position and the built-in switchgear is in a closed state. In this state, since the lower end portion 19A of the lock bar 19 is fitted in the lock hole 7B, the carriage 2 cannot be pulled out to the left (interlock). In addition, since the lock portion 22 is in contact with the opening / closing lever 6, the lock rod 19
Can not be lifted to remove the interlock. When the opening / closing device is opened, the opening / closing lever 6 is at the position of 6A. When the left end of the handle 23 is manually raised, the connecting portion 2
The lock bar 19 also moves up via 4. At that time, the lock part 2
2 also rises, but does not become an obstacle because the opening / closing lever 6 is at the position of 6A. When the lock rod 19 is lifted, the lower end 19A of the lock rod 19 comes out of the lock hole 7B,
The carriage 2 can be pulled out to the left. Further, the pressing portion 25 is raised, and the roller 20A of the limit switch 20 is moved.
Press. The limit switch 20 is configured such that the switchgear is not electrically closed when the roller 20A is pressed. Furthermore, the upper end of the lock rod 19 is 19
Since it comes to the position B, the push button switch 21 cannot be pressed. Therefore, while the bogie 2 is being pulled out to the left, the opening / closing device cannot be operated for closing (interlock).

The carriage 2 is pulled out to the left and the handle 2
When 3 is left free, the lower end 19A of the lock bar 19 fits into the lock hole 7A at the lock hole 7A. The lock bar 19 remains moved downward by the force of the spring 15. In the pulled-out state, the switch lever 20B of the limit switch 20 is opened, so that a test for electrically opening and closing the switching device can be performed. However, when the opening / closing device is closed and the opening / closing lever 6 is at the position indicated by the solid line, the interlock cannot be released by raising the lock rod 19 because the lock portion 22 is in contact with the opening / closing lever 6. Lower end 19 of lock bar 19
Since A is still fitted in the lock hole 7A, the carriage 2 cannot be pushed rightward (interlock).

To return the drawer to the operating position, the opening / closing device is opened and the opening / closing lever 6 is raised to the position 6A. Thereafter, if the lock bar 19 is raised by manually raising the left end of the handle 23, the lower end 1
9A comes out of the lock hole 7A. By this, the cart 2 can be pushed rightward, but in the middle,
Since the switch lever 20A of the limit switch remains pressed as in the case of pulling out the cart 2,
The switchgear can never be closed (interlock). When the bogie 2 reaches the driving position,
The lower end 19A of the lock bar 19 fits into the lock hole 7B. In the operating state, the switch lever 20B of the limit switch 20 is opened, so that the switchgear can be electrically opened and closed.

In FIG. 1, the handle 23, the locking portion 22, and the pressing portion 25 are formed by processing a single plate, so that the number of parts is smaller than that of the conventional device and the mounting to the lock rod 19 is performed. You can save time. Therefore, the cost of the product is reduced. Further, since the pressing portion 25 is bent in the inclination direction of the switch lever 20B, the pressing amount of the pressing portion 25 of the roller 20A becomes constant. As a result, it is not necessary to accurately adjust the mounting position of the limit switch 20, so that the number of manufacturing steps is reduced and the cost of the product is reduced.

Further, in FIG. 1, the size of the guide hole 17 through which the lock rod 19 penetrates and the size of the bogie hole 2B are formed to be different from each other. For example, lock stick 1
Assuming that 9 is a rectangular prism having sides of 10 mm, each of the guide hole 17 and the bogie hole 2B is a rectangular square hole, one of which is 10.1 mm and the other is 10.
The size is set to 5 mm. Thereby, the lock rod 19
There is no play, and you can move up and down smoothly. If both sides of the square hole are set to the smaller side of 10.1 mm, if the lock rod 19 is slightly inclined from the vertical direction, it will be caught on the edge of one square hole and will not move smoothly up and down. Also, each side of both square holes is larger
If the distance is set to 0.5 mm, rattling of the lock rod 19 occurs.

[0020]

As described above, according to the present invention, the handle, the locking portion and the pressing portion are formed by processing a single plate, so that the number of parts is reduced as compared with the conventional device, and the cost of the product is reduced. Reduced. In this configuration, since the pressing portion is bent in the direction in which the switch lever of the limit switch is inclined, the amount of pressing by the pressing portion is constant. As a result, it is not necessary to accurately adjust the mounting position of the limit switch 20, so that the number of manufacturing steps is reduced and the cost of the product is reduced.

In this configuration, the size of the guide hole through which the lock rod penetrates and the size of the bogie hole are different from each other. Thereby, the play of the lock bar is eliminated, and the up-down movement can be smoothly performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of an interlock device of a drawer-type device according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow B in FIG. 1;

FIG. 3 is a side view showing the configuration of the drawer type device.

FIG. 4 is a side view showing a configuration of a conventional drawer-type interlock device.

[Explanation of symbols]

8, 19: lock bar, 27: open / close axis, 6: open / close lever,
10, 25: pressing portion, 11, 23: handle portion, 13, 2
2: Lock part, 17: Guide hole, 2: Bogie, 2B: Bogie hole, 9, 20: Limit switch, 20A: Roller, 2
0B: switch lever, 7: lock plate, 7A, 7B: lock hole

Claims (3)

[Claims] 1. A device for interlocking a drawer type device on which a switchgear is mounted on a trolley and which is put in and out of a switchboard so that the trolley does not move in a drawer position and an operation position, wherein the trolley is movable up and down. A lock rod that penetrates the bogie hole provided and is urged downward by a spring,
A limit switch for electrically closing the switchgear in the opened state by being pressed; a handle for manually driving the lock bar upward; and a lock for locking the switchgear in the closed state. A locking portion for stopping the raising of the rod, a pressing portion for pressing the limit switch in conjunction with the raising of the lock bar when the opening / closing device is opened, and a lower end portion of the locking rod at the pulling-out position and the operating position of the drawer-type device. In the interlock device of the draw-out type device, each of which has a lock hole into which a lock hole is fitted and which is fixed to the fixing member, the handle portion, the lock portion, and the pressing portion are formed by processing from a single plate material. An interlock device for a drawer-type device, wherein the plate member is formed and attached to a lock bar. 2. An interlock device for a draw-out type device according to claim 1, further comprising a switch lever with a roller for pressing a limit switch, wherein said switch lever is disposed to be inclined with respect to the up and down directions. The end portion of the pressing portion is bent in the same inclination direction as the switch lever, and the limit switch is pressed by the inclined surface of the pressing portion pressing the roller of the switch lever as the lock rod rises. Interlock device for drawer type equipment. 3. The interlock device for a draw-out type apparatus according to claim 1, wherein a support having a guide hole through which a lock rod passes is provided at a lower portion of the bogie, and the size of the guide hole and the bogie hole are provided. And an interlock device for a drawer-type device, wherein the sizes of the interlock devices are different from each other.