TWI310954B - - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an externally operated grip that can be turned ON and OFF from a circuit breaker provided on a low-voltage switchboard, a control panel, or the like from outside the faceplate. [Prior Art] Since a circuit breaker (such as an automatic breaker) equipped with a low-voltage switchboard, a control panel, etc. can be manually turned ON and OFF from the outside of the faceplate, it is used as an accessory for use with a circuit breaker. The externally operated grip device of the device (selected product) is well known (for example, refer to Patent Document 1). Here, the structure of the circuit breaker described above is shown in FIG. 4 (for example, 'refer to Patent Document 2), at 5th (a) ), (b) shows an externally operated grip device for use with the circuit breaker. In Fig. 4, the circuit breaker 1 is a main circuit terminal 3, 4 which is assembled on the power supply side and the load side in the main body casing 2; a fixed contact 5; a movable contact 6; an opening and closing mechanism 7; an overcurrent tripping device 8; and the structure of the rocker grip 9 for opening and closing operation, when the rocker grip 9 is manually turned to the ON and OFF positions, the opening and closing mechanism 7 is subjected to the opening and closing spring 10 in conjunction with this. The spring force reverses the actuation and causes the main contact to open. On the other hand, in the fifth (a) and (b), the externally operated grip device 11 is coupled to the body casing of the above-described circuit breaker 1 (spigot -6 - 13^10954, (2)

The body 12 of the wire fixing is provided with a rotary operation knob 13 and a configuration of a driving device to be described later between the operation knob 13 and the rocker grip 9 (see FIG. 4) of the circuit breaker. The composition 'and the operation knob 13 is turned to the ON and OFF display positions to drive the rocker grip of the circuit breaker to the ON and OFF positions. Further, 14 is a display panel that displays the ON, OFF, TRIP, and RESET positions of the operation knob 13 , 15 is a pull-out type lock plate provided to operate the knob 13 , and 16 locks the lock plate 15 to the OFF position. The padlock, the locking mechanism including the operation knob 13 of the lock plate 15, and the order of the locking operation are described in detail in the above Patent Document 1. Further, the above-described drive mechanism is configured such that the steering base that is provided with the crank pin that is coupled to the operation knob 13 and the slide base that is coupled to the crank pin of the steering base and that moves in the linear direction are engaged. The base and the rocker grip of the circuit breaker are engaged with each other, and the rotation of the operation knob is converted into a linear motion to drive the rocker grip to the ON and OFF positions.

[Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. 5-225864 (Patent Document 2) Japanese Patent Application Laid-Open No. Hei No. Hei. In the use state of the circuit breaker described above in conjunction with the above-described configuration operation grip device, in the case where the circuit breaker is abnormally connected, the external operation of the grip device may cause an erroneous operation as follows. That is, in the circuit breaker shown in Fig. 4, if the circuit breaker does not trip when the excessive current flows to the main circuit in the event of a failure, the main contact is due to contact due to contact between the contacts. The abnormal state of the fusion occurs in the state of the weld. In such a welded state, even if the rocker grip is to be turned OFF, the main contact is welded and cannot be separated, so that the grip is not moved under the normal operating force. However, once the gripping device is operated in conjunction with the external operation, the main contact of the circuit breaker in the state of maintaining the welded state has an OFF problem with the operation knob of the externally operated grip device. That is, the externally operated grip device of the prior art functions as a drive mechanism that cooperates with the steering base of the crank pin and the slide base, and the force applied to the operation knob is amplified and the circuit breaker is Rocker grip. For this reason, once the contact welding force is applied to the operation knob of the externally operated grip device and is turned to the position, the movable part contact member of the opening and closing mechanism associated with the rocker grip is deformed and the operation is twisted and twisted. The 〇FF display position in the OFF position pulls the lock plate 15 shown in Fig. 5 from the operation 3 to form a lock on the padlock 16. Moreover, the main contact of the circuit breaker in this state is despite the fact that the outer contact is melted: the bump of the obstacle (the contact of the impedance is also the position of the rocker and the position of the OFF state) It will be installed as a boosting force in the state of the OFF position (movable, and the twist 13 is welded and -8 - (4) the brake is closed, and the operation knob of the externally operated grip device 1 3 is the display OFF position (refer to the 5th (a ))) For this reason, the maintenance personnel externally operate the OFF display of the grip device to misinterpret the circuit breaker as an open circuit, and contact the secondary side (load side) circuit of the circuit breaker to have a risk of electric shock. In such an electric shock accident, the main contact of the circuit breaker is to be turned OFF in the welded state, and the rocker grip of the circuit breaker is mechanically locked in the ON position, and is made impossible to be turned OFF. Although a circuit breaker having an insulating function for positional movement has been developed, the circuit breaker is a structure in which a switching mechanism is complicatedly formed, and the cost of the product becomes high. The present invention has been developed in view of the above points. The purpose is to make the externally operated grip device used in conjunction with the conventional circuit breaker without insulation function to be in an abnormal state in which the main contact of the circuit breaker is welded, so as not to twist the operation knob to the OFF position. Provided is an externally operated grip device having an insulating function which is improved in safety. (Means for solving the problem) In order to achieve the above object, the first item of the patent application scope according to the present invention will be equipped with a face plate. The circuit breaker of the inner rocker grip is externally operated from the outside of the dial, and the externally operated grip device is operated by the 0FF. The body combined with the gripper device and the circuit breaker body is disposed in front of the fuselage. The rotary operation knob and the combination of the steering base equipped with the crank pin and the sliding base to convert the rotation of the operation knob into a linear motion drive mechanism, and the sliding base and the circuit Circuit breaker-9-

Further, in the externally operated grip device of the circuit breaker in which the positive (5) rocker grips are coupled to each other to drive the rocker grip into the ON position, a locking means is provided on the drive mechanism The locking means performs an operation torque on the external operation of the circuit breaker that is unable to move to the 〇FF position in an abnormal state in which the circuit breaker contacts are welded, and the locking means is as follows According to the second aspect of the patent application scope of the present invention, as a locking means for the twist, a lock lever that is opposite to the crank pin of the swivel in the OFF direction is provided on the slide base of the drive mechanism, and The lock spring is biased toward the normal position, and the shutter is tilted by the OFF operation of the grip in the joint welding state of the circuit to prevent the slide lever from being engaged with the lock lever The stop of the movement of the direction is provided on the side of the fuselage. According to the third aspect of the patent application scope of the present invention, in the front, on the sliding base of the drive mechanism, it is disposed separately from the sliding body and is opposite to the rocker grip of the circuit breaker. The plate member is pushed and the push plate member is coupled to the slide base via a spring. In the above configuration, the spring force of the lock return spring (compression spring) provided on the slide base is set to be equal to the operation force of the rocker grip when the circuit breaker is normally opened and closed. If the spring force of the curve is normal, when the main contact of the circuit breaker is not welded, the operation of the externally operated grip device is rotated.

OFF Limiting the grip to make the operation to the base rod spring OFF item 3 The inflexible abnormality of the seat rod on the base side OFF -10- (6) When the operation is performed, the lock lever is held in the normal position. The crank pin of the steering base, together with the lock lever, pushes the slide base in the OFF direction and drives the rocker grip of the circuit breaker. On the other hand, in the abnormal state in which the main contacts of the circuit breaker are melted, the sliding base which is engaged with the rocker grip is formed at such a position as to encounter a large restraining force. When the circuit breaker is turned OFF in this state, when the operation knob of the externally operated grip device is rotated in the OFF direction by a force larger than usual, the lock lever of the crank pin of the steering base is pushed. Rotate against the return spring. When the sliding base simultaneously receiving the operating force presses the push plate member against the state of the rocker grip, the connecting spring is deflected while moving slightly toward the OFF direction together with the rocker grip, such as The above-described rotating rocker grips are in contact with the stoppers provided on the side of the body to overlap each other, and the movement of the slide base above is prevented. As a result, the operation of the externally operated grip device cannot be twisted to the OFF display device, and the OFF display of the grip operation can be prevented in the abnormal state in which the prior art externally operated grip device becomes the main contact of the problem. Misunderstanding. Further, since the movement of the slide base in the OFF direction is prevented in this case, the rocker grip of the circuit breaker does not apply an excessive operation force, and therefore there is no concern that the movable part inside the circuit breaker is deformed. [Embodiment] Hereinafter, the -11 of the present invention will be described based on the embodiments shown in Figs.

(7) Implementation method. Further, 'Fig. 1 is a diagram showing the driving mechanism of the externally operated grip device'. Figs. 2(a) and (b) are diagrams showing the operation of the driving mechanism, and Figs. 3(a) to (c) are diagrams showing the external operation grip. In the state in which the device is mounted in the circuit breaker, the same reference numerals are given to members corresponding to those in Figs. 4 and 5 in the drawings of the embodiment. First, in the first drawing, the drive mechanism 17 is a steering base 18 that is coupled to a rotating shaft that operates the twist 13 (see FIG. 3), and is connected to the steering base 18 to form a third. The sliding base 17 of the resin molded article which is in contact with the rocker grip 9 of the circuit breaker 1 is used as a basic component, and the recess formed in the upper surface of the sliding base 19 is provided with: An L-shaped lock lever 20 disposed opposite to the crank pin 18a and the OFF side of the steering base 18, and a return spring 21 of the lock lever 20, and at the left end of the slide base 19 are The push-piece member 19a separated from the base body so as to be opposed to the ON side of the rocker grip 9 of the circuit breaker 1, and the push plate member 19a and the base body are integrally formed. The spring 19b is coupled. Further, a slight swimming gap is set between the base body of the slide base 19 and the pedal member 19a to restrict the movable range of the pedal member 19a. Further, the slide base 1 9 is inserted and inserted into the lower side of the body 1 as shown in Fig. 3, and is slidably supported in the linear direction. Here, the lock lever 20 is pivotally supported by the side edge of the slide base 19 at one end thereof via the support shaft 20a, and is formed to engage with the stopper portion 12a at the L-shaped corner of the lever. Claw 20b. In addition, the return spring 21 is interposed between the end faces of the recesses formed on the front end of the lock lever 20 and the -12-I 1 ^ 1 -»»«ι··ι»,·**ιιι And a compression spring that pushes the lock lever 20 from the back, and the spring force is a spring force that is set to be strong without being deflected by a normal operating force applied to the operation knob 13 during the OFF operation of the circuit breaker. . Further, the guide groove portion of the slide base 19 belonging to the body 12 is formed with a stopper portion 12a that protrudes toward the inner side of the side edge of the slide base 19, so that the lock lever 20 is rotated (clockwise) with The claw portions 20b are engaged and fitted to each other. As shown in the third (a) to (c), the externally operated grip device 11 of the above configuration is mounted on the body body 12 of the circuit breaker 1, and the slide base 19 is fabricated to be a circuit in the mounting position. The rocker grip 9 of the circuit breaker 1 is clamped from the left and right (ON, OFF sides). Further, in the third (b) diagram, 12b is a cover of the body 12, and 12c is a locking groove that is locked by fitting the lock plate 15 pulled out from the operation knob 13 to the OFF display position. Then, in the normal state in which the welding is not generated at the main contact of the circuit breaker 1, once the operation knob 1 of the externally operated grip device 1 is turned to the ON and OFF positions, in the ON operation, The crank pin 18a of the steering base 18 directly abuts against the concave portion of the slide base 19 and pushes in the left direction, and the rocker grip 9 of the circuit breaker 1 that will be engaged with the slide base 1 9 Reverse to the ON position. Thereby, the opening and closing mechanism 7 operates correspondingly to close the main contact. Further, at the time of 0 FF operation, the crank pin 18a of the steering base 18 comes into contact with the lock lever 20' that pushes the spring 21 toward the normal position and pushes the slide base 19 to the right direction together with the lock lever 20. . Thereby, the sliding base 19 is a rocker grip -13- across the push plate member 丨 9a.

9 is driven to the OFF position and circuit breaker i is 0FF. On the other hand, in the state where the circuit breaker 1 is abnormal in the joint welding, once the operation knob 1 of the grip device 1 is externally operated and the force is turned to the OFF position, the sliding base of the position is restricted. 1 9 does not move, and the lock lever 2 推 urged against the crank pin 18a of the steering base 18 is rotated clockwise against the return spring 2 1 with the support shaft 20 a as a center, and a lock lever is formed The claw portion 20b of the 20 is protruded toward the iron stopper portion 12a formed in the body 12 (see FIG. 2(a)). Further, when the pedal member 19a is pressed against the rocker grip 9 and the slide base 19 is pressed against the spring 19b to be flexed while moving to the right side, the claw portion 20b of the lock lever 20 is stopped. The stopper portions 12a are in contact with each other (see Fig. 2(b)), and the slide base 19 is prevented from moving in the right direction. Thereby, the operation knob 1 3 is not rotated until it is turned to the OFF display position. Further, in the process of shifting from the second (a) diagram to the second (b) diagram, the rocker grip of the circuit breaker 1 is pushed by the connection spring 19b of the slide base 19 being deflected. The force is absorbed 'so that the rocker grip 9 is in a state of not stopping at this position' and there is no concern that the movable part (movable contact) inside the circuit breaker is deformed. Further, in this case, if the movable push plate member 19a and the spring 19b are not provided, the slide base 9 is directly pressed in the OFF direction by the slide base 19, and the slide base is used. The movement of the seat 19 in the second (a) diagram to the second (b) diagram is not only the case where the rocker grip 9 is forcibly pressed to cause the movable contact of the circuit breaker 1 to be deformed. '一-14- w

In this state, the position of the slide base 1 9 and the rocker grip 9 which are rotated in the OFF direction by the _ return to the one end ON position of the externally operated grip device 11 is repeatedly shifted toward the OFF side. The claw portions 1 2a of the lock lever 20 cannot be engaged with each other and have a function of dissipating the insulation. Further, in the illustrated example, the slide base 19 that connects the springs 19b is integrally formed, but a single spring can be used. Further, the externally operated grip device of the applicable embodiment is not limited to the circuit disconnection of the configuration shown in Fig. 4, and can be similarly applied to other types of rocker type grips having different opening and closing mechanisms. (Effect of the Invention) As described above, according to the present invention, the circuit breaker equipped with the rocker grip can be opened from the outside of the dial to the externally operated grip device, and the lock is provided on the drive mechanism. The method restricts the operation knob in the occurrence of the main contact of the circuit breaker, so that it cannot be turned to the OFF position. The device itself maintains the insulation function, and the grip device is used in the abnormal state of the joint of the circuit breaker. If the OFF operation is performed, the OFF display position 'cannot be used to prevent the erroneous operation that is caused by the problem in the prior art device and the I of the circuit breaker from being turned into a 13-turn operation. b, the circuit breaker of the metal with the stopper portion I ° and the resin molded article, and of course, the circuit is opened in the face plate, and the locking operation of the OFF operation is performed, and in an abnormal state, the movement is performed, and Even if the external operation is twisted and twisted to the external operation, the operation state of the grip is incorrect -15-

The safety of the maintenance management surface can be improved by recognizing an electric shock. Further, by adopting the configuration of the second or third aspect of the patent application as the above-described locking means, the locking means can be made functional without obtaining an excessive operation load on the circuit breaker, and high reliability can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view showing a driving mechanism of an externally operated grip device according to an embodiment of the present invention. Fig. 2 is an operation explanatory view of the drive mechanism of Fig. 1, and (a) and (b) show the operation of the externally operated grip device 0 FF in the state where the circuit breaker is in the contact welding state. Figure. Fig. 3 is a view showing a state in which the externally operated grip device of Fig. 1 is incorporated in a circuit breaker, and (a), (b), and (c) are side cross-sectional views, plan views, and A plan view of the state in which the cover of the grip device is removed. Fig. 4 is a cross-sectional view showing the configuration of a circuit breaker to which an externally operated grip device is applied. Fig. 5 is an external view '(a), (b) of the externally operated grip device implemented by the prior art, which is a plan view 'and a side view, respectively. [Main component comparison table] 1...circuit breaker 2...body casing 6...movable contact tool -16-

Rro^ii' (12) 7 ... opening and closing mechanism 9 ... rocker grip 1 1 ... externally operated grip device 12.. body 12a... stopper 1 3 ... Operating knob

17.. Drive mechanism 1 8 ... steering base 1 8a ... crank pin 19.. slide base 1 9a... push plate member 19b... connection spring 2 0... lock lever 2 0a... fulcrum 2 1 ...recovery spring

-17 -

Claims (1)

平矽秘F_': 二Γ::1 ζ \ ------------^了--------------____________ j Pick up, apply for patent scope 1 An externally operated grip device for a circuit breaker is an externally operated grip device that can perform ON and OFF operations of a circuit breaker equipped with a rocker grip provided in a control panel from outside the control panel. The utility model is characterized in that: a body combined with the circuit breaker body by the grip device, a rotary operation knob disposed at the front of the body, and a steering base equipped with the crank pin and the sliding base cooperate to rotate the operation The combination of the rotating mechanism that converts the rotation into a linear motion, the sliding base is coupled to the rocker grip of the circuit breaker, and the rocker grip drive is driven at the ON, 0FF position. The externally operated grip device of the circuit breaker is characterized in that: the locking mechanism is provided on the driving mechanism, and the locking means limits the operating torque in a state in which the abnormality of the main contact of the circuit breaker occurs, so that the operating torque is restricted It cannot move to the OFF position. 2. The externally operated grip device of the circuit breaker according to the first aspect of the invention, wherein, as a locking means for operating the knob, a crank pin and a steering pin are provided on the sliding base of the driving mechanism a lock lever that is opposite to the cymbal in the OFF direction, and a return spring that pushes the lock lever toward the normal position, and at the same time, the OFF operation of the grip under the contact state of the circuit breaker by the contact of the circuit breaker is provided on the body side to overcome the return spring A stopper that engages the above-described lock lever that is tilted to move to prevent the slide lever from moving in the OFF direction. 3. The externally operated grip device of the circuit breaker as recited in claim 2, wherein the slide base is provided with a rocker grip that is separate from the slide base body and the circuit breaker Relatively close to ON -18- The push plate member on the side is coupled to the slide base body via a spring via the push plate member. -19- Ι3ΐα954 柒, (1), the designated representative figure of this case is: Figure 1 (2), the representative symbol of the representative figure is a simple description: 12.. . fuselage 1 2 a ... stop section 17.. drive Mechanism 1 8... steering base 1 8 a ... crank pin 19.. slide base 1 9a... push plate member 19b... connection spring 20.. lock lever 2 0a... Axis 2 1 ...Restore spring 捌, if there is a chemical formula in this case, please reveal the chemical formula that best shows the characteristics of the invention: