JPH0673848U - Interlock device for multi-circuit switch - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to propose an interlock device having a simple structure mainly composed of a rotatable lock plate in a multi-circuit switch. [Structure] Cable terminals 16 to 18 to which a cable protruding from a front panel 6 of a switch 1 can be attached and detached, and located above the cable terminals 16 to 18 in the cable terminal direction or the opposite cable terminal direction. Operation part 10-12 of the operation handle that slightly protrudes from the front panel
And lock plates 21 to 23, which are located between the cable terminal and the operating portion of the operating handle and have a hinge structure,
When the operation part of the operation handle is in the closed state, it is blocked by the same part to open the front side of the operation part, and when the operation part of the operation handle is in the cut state, the side of the panel opposite the cable terminal side. The stopper 26 located at the position is prevented from falling by rotation so that the front side of the operating portion is closed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of an interlock device for a multi-circuit switch.

[0002]

[Prior art]

 The multi-circuit switch used in the underground high-voltage power distribution line is equipped with an interlock device to prevent operators from accidentally opening and closing the operating handle during construction work.

[0003]

[Problems to be solved by the device]

 By the way, since the above-mentioned conventional interlock device generally has a complicated structure, it has been a cause of a failure or a cost increase.

Therefore, an object of the present invention is to propose an inexpensive interlock device with a simple structure.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention relates to the first invention, in which the cable terminals (16, 17, 18) provided on the lower side of the front surface of the switch (1) and the operation handle provided on the upper side thereof. Of the operating parts (10, 11, 12) and a lock plate (21) provided with a pivoting hinge (24) at the intermediate part thereof to open and close the front surface of the operating parts (10, 11, 12). , 22, 23), the operating portion (10, 11, 12) is provided so as to slightly project from the front surface of the opening / closing device and rotatable up and down, and the lock plates (21, 22 and 23) are Is closed to the operation part (10, 11, 12) side so that the closed state can be locked by a fastener (26) provided on the switch side, and further, the lock plate (21, 22, 23) If the operation part (10, 11, 12) is located in the ON state, When the lock plates (21, 22, 23) cannot be closed by hitting the operating part (10, 11, 12) and the operating part (10, 11, 12) is located in the cut state, the operating part ( An interlock device for a multi-circuit switch characterized in that a locking portion (21c, 22c, 23c) capable of closing the lock plate (21, 22, 23) without abutting the (10, 11, 12) is formed. Is proposed.

According to a second aspect of the present invention, the lock plate (21, 22, 23) according to the above-mentioned claim 1 is provided with the operation portion (10, 11, 12) side of the operation handle and the cable terminal (16, 17, 18). ) Side of the lock plate (21, 22, 23) is provided with a protrusion amount when the operation portion (10, 11, 12) is in the engaged state. ) Is in contact with the lock plate (21, 22, 23) so that the lock plate (21, 22, 23) can be easily rotated and dropped to the cable terminal (16, 17, 18) side. Is proposed.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a multi-circuit switch in which the open / close door on the front side of the case is removed. Reference numeral 1 denotes the multi-circuit switch. The case 2 accommodates a manual switch 3, an automatic switch 4, and a switch 5 with an overcurrent lock.

The front panel 6 on the front side of the switch is provided with operation ports 7, 8 and 9 of the operation handle for opening and closing the electric path, and each operation port has operation portions 10 11, 11 of the operation handle. 12 is provided in such a state that it slightly protrudes from the opening to the front side.

In the figure, the manual switch 3 has an operating portion 10 located on the lower side, and the electric path state of the switch is “on” as indicated by a pointer 13, and the automatic switch 4 is on the automatic side. That is, it is located on the upper side, the electric circuit state is "OFF" as indicated by the pointer 14, and the switch 5 with an overcurrent lock has the operating section 12 located on the lower side, As indicated by the needle 15, the electric circuit state is "on".

Reference numerals 16, 17, and 18 denote main circuit cable terminals provided on the front side of the case, and each switch has three phases, that is, three terminals are arranged in parallel. Reference numeral 20 denotes a shutter-type interlock device, the lock plates 21, 22 and 23 of which are located in the middle of the operation portions 7, 8 and 9 and the cable terminals 16, 17 and 18, and a horizontal hinge shaft 24. And is vertically rotated about the shaft 24 toward the cable terminal side and the non-cable terminal (operating portion) side.

The relationship between the operating portion 10 and the lock plate 21 in the manual switch 3 will be described in detail. The lock plate 21 is composed of a long handle portion 21a and an engagement portion 21c which is formed by forming a cutout portion 21b at its side portion to make it shorter, and the operating portion 10 is at the position 10a in FIG. 2 (off). When the lock plate 21 is erected upward in the case of, the operating portion 10 is located in the cutout portion 21b, and when the operating portion 10 is in the position (on) of FIG. 10b, the lock plate 21 is moved upward. When it is erected, the operating portion 10 comes into contact with the outer surface of the short engaging portion 21c.

Therefore, when the operation unit 10 is located on the upper side, that is, when the switch is opened (cut), the lock plate 21 is erected as shown by the chain line in FIG. The groove 21d formed in the above can be fitted and fixed to the fastener 26.

Further, when the operating portion 10 is located on the lower side, that is, when the switch is turned on as shown in FIG. 1, when the lock plate 21 is erected to the operating portion 10 side The outer surface of the engaging portion 21c of the lock plate 21 collides with the projecting end of the operating portion 10. Therefore, the lock plate 21 cannot be fixed by the fastener 26, and the lock plate 21 pivotally drops downward as shown in the figure to prevent the cable terminal 16 from being attached / detached and locked.

Therefore, only when the operation unit 10 is turned off, that is, when the switch is opened, the lock plate 21 can be raised to the operation unit side to fix the state, and the cable can be attached / detached. In addition, the operation unit 10 cannot be closed while the cable is being attached or detached.

Further, the lock plate 22 of the automatic switch 4 is also formed in the same manner as the lock plate 21, and when the operating portion 11 is located on the upper side, that is, when the switch is opened (cut). The lock plate 22 can be erected as shown in FIG. 1 and the groove 22d formed in the handle portion 22a can be fitted and fixed to the stopper 26. That is, when the switch is open, the lock plate 22 can be removed from the cable terminal 17 to attach and detach the cable.

Further, when the operating portion 11 is located on the lower side, that is, when the switch is closed (closed), the lock plate 22 cannot be erected like the lock plate 21. The locking plate 22 falls to the front surface of the cable terminal 17 to close and lock the attachment / detachment port of the cable terminal 17. Therefore, the cable cannot be attached or detached during power transmission.

Further, the lock plate 23 in the switch (SOG) 5 with an overcurrent lock also has a handle portion 23a, a notch portion 23b, and an engaging portion 23c similar to the above, and the operating portion 12 is as shown in the figure. When it is located on the lower side, that is, when the switch is turned on, the lock plate 23 cannot stand up and hold like the lock plates 21 and 22, and the cable terminal 18 cannot be held. Lock the attachment / detachment port. Therefore, the cable cannot be attached or detached during power transmission.

In the above, when locking the operating portion 11 on the operating handle side, the lock plate 22 closes most of the vertically long operating opening 8 so that only the operating portion 11 moved to the upper side can be seen. The cutting plate 30 and the pointer 14 are formed so as not to be hidden by the same plate.

Further, the lock plates 21, 22, and 23 are formed so as to collectively close the front sides of the three phases for the cable terminals. Reference numeral 31 is an operation handle configured to be attachable to the operation portions 10, 11, and 12 and is usually provided on the inner surface side of the opening / closing door, and is detached from the opening / closing door for use during operation. When it is finished, it will be restored.

[0020]

[Effect of device]

 The present invention has the above-mentioned configuration. In the first invention, in the case where the operation portion of the operation handle is inserted despite the interlock device having a simple structure mainly composed of a rotatable lock plate, It is safe because the front side of the operating part of the operating handle can be closed securely to lock the operating part only when it cannot be locked and is turned off. The second invention is characterized in that the operation portion of the above-mentioned operation handle can be locked, and when the operation portion is released, the front side of the attachment / detachment port of the cable terminal is closed to lock the attachment / detachment operation of the cable. In addition, accidental attachment / detachment of the switch during power transmission can be prevented and safety can be further enhanced.

[Brief description of drawings]

FIG. 1 is a front view of a multi-circuit switch with a front opening / closing door removed.

FIG. 2 is a side view of the main part of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-circuit switch 10, 11, 12 Operation part 16, 17, 18 Cable terminal 20 Interlock device 21, 22, 23 Lock plate 26 Fastener

Claims (2)

[Scope of utility model registration request] 1. A cable terminal (16, 17, 18) provided on a lower side of a front surface of a switch (1), an operating portion (10, 11, 12) of an operating handle provided on an upper portion thereof, and these. And a lock plate (21, 22, 23) which is provided in the middle part of the operating part (10, 11, 12) by a turning hinge (24) so as to open and close the front surface of the operating part (10, 11, 12). 11 and 12) are provided so as to slightly project from the front surface of the switch so as to be pivotable up and down, and the lock plates (21, 22, 2)
3) closes this to the operation portion (10, 11, 12) side so that the closed state can be locked by a fastener (26) provided on the switch side, and further, the lock plate (21). , 2
2, 23), when the operation part (10, 11, 12) is positioned in the inserted state, the operation part (10, 11,
12), the lock plates (21, 22, 23) cannot be closed, and when the operating parts (10, 11, 12) are located in the cut state, the operating parts (10, 11, 12) are in contact. An interlock device for a multi-circuit switch characterized in that a locking portion (21c, 22c, 23c) capable of closing the lock plates (21, 22, 23) without contact is formed. 2. The lock plate (21, 22, 2) according to claim 1.
3) is rotatably provided on the operating portion (10, 11, 12) side of the operating handle and on the cable terminal (16, 17, 18) side, and the operating portion (10, 11, 12) is in the inserted state. In the state in which the engaging portions (21c, 22c, 23c) of the lock plates (21, 22, 23) are in contact with the protruding amount at the lock plate (21, 22, 23), the cable terminal (16,
An interlock device for a multi-circuit switch which is set so as to be easily rotated and dropped to the (17, 18) side.