JP5558223B2 - Switch operating device and method for restraining its spring - Google Patents

Description

  The present embodiment relates to a switch operating device for opening and closing an electric circuit and a method for restraining a closing spring attached to the switch operating device.

  In general, in a high-voltage switch operating device, electrical contacts must move between open and closed positions at high speed. In a switch for each phase operation having an operation device for each of the three phases, the variation in the closing time is defined by the standard. One of the adjustment methods is to change the initial setting value of the closing spring force. This adjustment is often performed by removing the closing spring from the switch. In addition, when a failure occurs during the closing operation, it is necessary to restrain the closing spring by attaching a jig or the like to ensure safety.

  As a first conventional example of such a switch operating device, in order to remove the closing spring, the closing spring is released with the fixing pin inserted, and then the upper end of the closing spring guide is removed from the roller follower. There is a structure in which the guide is lifted together with the guide shaft, and the guide shaft is pulled out from the support member.

  In this first conventional example, the method for adjusting the closing spring force is not specified, so it is expected that a method of sandwiching a spacer or the like at the end of the closing spring is expected. In order to pinch, it is necessary to remove the closing spring once.

  As a second conventional example of an operating device for a switch, as in the first conventional example described above, a jig pin is inserted into a hole provided in the guide portion before the closing operation and released to release the closing spring. There is one in which a connecting pin can be pulled out by receiving force with a jig pin. In the second conventional example, the whole closing spring portion can be removed after the connecting pin is pulled out. The spring force adjustment is also assumed to be the same as in the first conventional example.

Japanese Patent Laid-Open No. 10-334774 Japanese Patent Application Laid-Open No. 64-82220

  In the case of the first conventional example and the second conventional example described above, when removing the closing spring, the spring force must be borne by the pin in the middle of mounting the pin and releasing the closing spring force. When the closing spring is released, a dynamic force is applied to the pin in a state where the closing spring force is still large, so the pin and the portion supporting the pin must have a strong structure.

  In the switch operating device, in the event that the closing operation stops in the middle due to a failure of the contact portion or the like, it is necessary to first restrain the closing spring from operating in order to ensure safety. However, both the first conventional example and the second conventional example described above have a problem that if the closing operation is not possible, the pin cannot receive the closing spring force, so that it is not possible to cope with the above-described malfunction. there were.

  In addition, the spacer for adjusting the closing spring force needs to remove the closing spring portion from the operating device once and insert it outside, resulting in a problem that the adjustment work time becomes long.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and in a switch operating device that performs opening / closing operation of a switch, it is possible to safely remove the closing spring portion from the operating device even during normal operation and malfunction. An object of the present invention is to provide a switch operating device in which a spring force adjusting spacer can be attached and detached without removing the closing spring portion from the operating device, and a method for restraining the closing spring.

  According to the switch operating device of the embodiment, the other ends of the pair of first support levers, each having a stopper formed at one end, are rotatably fitted to a fixed shaft that protrudes from the frame of the switch operating device. The end of the camshaft protrudes from the fixed shaft on the surface of the frame at a predetermined distance and is arranged at one end with respect to the end of the crank lever pin on the crank lever provided on the camshaft. The other ends of the pair of second support levers on which the stoppers are formed are rotatably fitted. On the other hand, the hole that passes through the first support lever is formed at the center, the holes that are not provided with screw holes or screw grooves at both ends, the spacer positioning portion on one side, and the closing spring positioning on the other side. A first spring receiving body formed with respective portions, a hole through which the second support lever penetrates in the central portion, and a hole or screw hole in which both ends are not provided with a thread groove are further provided on one side surface A second spring receiver is prepared by forming a spacer positioning portion on the other side and a closing spring positioning portion on the other side surface. Further, a closing spring is provided for applying a spring force to the fixed shaft and the crank lever pin via the first support lever and the second support lever. The members of the support lever of either the first support lever or the second support lever are arranged so that the closing spring is disposed between the first spring receiver and the second spring receiver. The other support lever is inserted between them.

The front view which shows the state which restrained the closing spring of the switch operating device by Embodiment 1 by the restraint means. The side view which shows the state which excluded the restraint means from the switch operating device shown in FIG. The figure which shows a 1st support lever. The figure which shows a 2nd support lever. The AA arrow directional view of FIG. The BB arrow line view of FIG. The front view which shows the switch operating device by Embodiment 1. FIG. The front view which shows the state which restrained the closing spring of the switch operating device by Embodiment 1. FIG. The front view which shows the state which attached the spacer of the switch operating device by Embodiment 1. FIG. The front view which shows the state which restrained the closing spring of the switch operating device by Embodiment 2 by the restraining means. CC arrow line view of FIG. The figure which shows the state which attached the circular-arc-shaped collar by Embodiment 3 to the spring receiver.

  Embodiments of a switch operating device according to the present invention will be described below with reference to the drawings.

[Embodiment 1]
The switch operating device according to the first embodiment will be described with reference to FIGS.
FIG. 1 is a front view showing a part of the switch operating device in a state where the closing spring is restrained by the restraining means, and FIG. 2 is a side view of the switch operating device in a state where the closing spring restraining means is omitted from FIG. 3 is a view showing the first support lever, FIG. 4 is a view showing the second support lever, FIG. 5 is a view taken along arrow AA in FIG. 1, and FIG. 6 is a view taken along arrow BB in FIG.

  In addition, although the switch operating device includes each component such as a cutoff spring portion, a catch device portion, and a four-bar link, these components are not shown because they are not directly related to the present embodiment. .

(Constitution)
First, the configuration of the first embodiment will be described with reference to FIGS.
Reference numeral 1 denotes a frame (housing) that houses a fixed contact, a movable contact, a closing catch, a trip catch, and the like of a switch operating device. A fixed shaft 2 protrudes from the surface of the frame 1 at an upper position in the figure. It is provided as follows. An end portion of the first support lever 11 is pivotally attached to the end portion of the fixed shaft 2.

The first support levers 11, as shown in FIG. 3 (a), opening a rotatable attachment holes 11 ₁ at one end, and inserting a first safety pin 14 which will be described later in the vicinity of the rotatable attachment hole 11 ₁ back to back pin insertion hole 11 ₂ is opened a plurality a row, a pair of plate members 11A and 11B forming the branch portion 11 ₃ of the T-shaped functions as a stopper for the closing spring 30 further described below to the other end for It is configured in combination. Moreover, the branch portion 11 ₃ of the plate members 11A and 11B, as shown in FIG. 3 (b), the bent slight angle to the c-shape toward the ventral side of the back surface, the bent tip portions extends Are combined. Described below, but to support the expanded branch portion 11 ₃ first spring receiving body 12 plate in contact.

On the other hand, a cam shaft 4 is rotatably disposed through the frame 1 at a lower position in the figure of the frame 1 of the switch operating device. A cam 3 is fixed to the inside of the frame 1 of the cam shaft 4, and one end of a crank lever 5 is fixed to an end portion outside the frame 1.
A second support lever 21 is pivotally attached to the other end of the crank lever 5 via a crank lever pin 6.

The second support levers 21, as shown in FIG. 4 (a), similarly to the first supporting lever 11 described above, a hole 21 ₁ of the rotatable attachment at one end, and the vicinity of the hole 21 ₁ forming a second safety hole 21 ₂ for the pin 24 to insert opening into a plurality single row, the branch portion 21 ₃ of the T-shaped functions as a stopper for the closing spring 30 further described below in the other end portion to be described later A pair of plate materials 21A and 21B are combined back to back.

The branch portion 21 ₃ is also as shown in FIG. 4 (b), bent slight angle to the c-shape toward the ventral side of the back surface, the bent tip portions are combined so spread. The second spring bearing member 22 described later in this widened branch portion 21 ₃ contact, it is the same as for the first supporting lever 11 supporting.

First support lever is configured as described above 11, from the end of the pivot hole 11 ₃ side of the first rectangular hole 12a bored in the central portion of the spring receiving body 12 formed substantially oval fit, keep temporarily fixed in contact with the branch portion 11 ₃ which functions as a stopper. The long side of the rectangular hole 12a is opened to face the major axis of the ellipse.

The first spring receiving member 12 is in contact with the closing spring 30 to be described later in table (Table) plane shown in FIG. 6, comes into contact with the branch portion 11 ₃ of the first supporting lever 11 at its rear surface ing. And the 1st spring receptacle 12 makes the short diameter side slightly larger than the outer diameter of the closing spring 30 mentioned later, and is provided with the screw hole 12b in the both sides of the long diameter side.

  Further, the first spring receiver 12 is inserted into a portion slightly inside the inner diameter of the closing spring 30 at a position facing the long side of the rectangular hole 12a on the closing spring contact surface side which is the front surface. A pair of arc-shaped protrusions 12d for preventing displacement of the spring 30 is provided, and the first adjustment spacer 13 to be described later is positioned on the contact surface with the branching portion 113 of the first support lever 11 on the back surface thereof. A pair of protrusions 12c are provided.

The second support levers 21 is fitted from the distal end portion of the hole 21 ₁ side with respect to the first spring receiving member 12 and the second rectangular hole 22a of the spring receiving member 22 substantially formed in the elliptical plate-shaped in the same shape, the branch portion 21 ₃ which functions as a stopper keep temporarily fixed while abutting.

The second spring bearing member 22 will be described later on abutting surface viewed from the branch portion 21 ₃ of the second supporting lever 21 as shown in FIG. 5 sandwich the rectangular hole 22a of the abutting surface position of the branch portion 21 ₃ A pair of protrusions 22c for positioning the second adjustment spacer 23 is provided, and the inner surface of the closing spring 30 is slightly inward of the long side of the rectangular hole 22a on the surface in contact with the closing spring 30 on the opposite side. A pair of arc-shaped protrusions 22d for preventing the closing spring 30 from shifting is provided on the portion.

  The first spring receiver 12 is provided with screw holes 12b on both sides on the long diameter side, whereas the second spring receiver 22 has holes 22b that are not provided with screw grooves on both sides on the long diameter side. The two are different in that they are provided.

  As described above, in the state where the first spring receiver 12 is fitted to the first support lever 11 and the second spring receiver 22 is fitted to the second support lever 21, either one of the support levers, the example of FIG. The closing spring 30 is inserted into the first support lever 11 located on the lower side.

Next, between the plate members 11A and 11B of the first support lever 11, the pair of second support levers 21 in a state where the back surfaces of the plate members 21A and 21B are in contact with each other are close to the distal end side (hole 21 ₁ ). Insert from the side edge.

  Next, the feed bolts 31 are respectively inserted from the holes 22b provided on the left and right sides of the second spring receiving body 22 positioned on the upper side and not provided with thread grooves, and the tip ends thereof are placed on the lower first spring receiving body 12. Are screwed into the two screw holes 12b. A fixing nut is screwed into the protruding tip of the feed bolt 31 and fastened so that the feed bolt 31 does not loosen.

  Thereafter, the ring 34 is fitted to the tip protruding from the second spring receiving body 22 to the upper part in the figure, and the feed nut 33 is screwed on the ring 34, whereby the spring receiving body 12 of the first support lever 11 and the second support lever 21. The closing spring 30 is held between the spring receivers 22. The ring 34 has a slip characteristic so that the feed nut 33 can be smoothly rotated even when the spring force is high.

  In this specification, the first support lever 11, the first spring receiver 12, the first spacer 13, the second support lever 21, the second spring receiver 22, the second spacer 23, the closing spring 30, and the ring 34 are included. Is referred to as the closing spring portion 10 and the parts from the feed bolt 31 to the ring 34 are referred to as “closing spring restraining means”.

Thus, in the state of holding the closing spring 30 between the spring receiving member 22 of the spring receiving member 12 and the second support lever 21 of the first supporting lever 11, a pivot hole 11 ₁ of the first supporting lever 11 frame 1 is fitted to the fixed shaft 2 protruding from the surface rotatably holding the rotatably holding fitting the pivot hole 21 ₁ of the second supporting lever 21 to the crank lever pin 6. At this time, the first safety pin 14 is inserted into the hole 11 a provided in the first support lever 11 and the safety pin 24 is also inserted into the hole 21 a provided in the second support lever 21 in order to ensure safety in the work.

  If the closing spring 30 is compressed by screwing the feed nut 33 in this state, a gap is formed at the contact position between the first spring receiver 12 and the branching portion 113 of the first support lever 11. The first spacer 13 for adjusting the spring force can be inserted. Similarly, since a gap is formed at the contact position between the second spring receiver 22 and the second support lever 21, the second spacer 23 for adjusting the spring force can be inserted into this gap. The projections 12c, 22c that fit into the holes 13a, 23a of the first spacer 13 and the second spacer 23 are provided on both sides of the first support lever 11 and the second support lever 22, and the first spacer 13 Since the second spacer 23 has a substantially concave shape, it is very convenient for adjusting the spring force of the closing spring 30. 1 and 2 are schematic views showing this state.

(Function)
In the switch operating device according to the first embodiment configured as described above, a procedure to reach a state in which the closing spring 30 shown in FIG. 1 is restrained will be described with reference to FIGS.

FIG. 7 is a view showing the operation stop state of the switch operating device, and FIG. 8 is a view showing a state in which the closing spring restraining means, that is, the parts from the feed bolt 31 to the ring 34 are arranged in the switch operating device.
When the switch is turned on, if it stops halfway due to a failure of the contact point, etc., it is necessary to quickly restrain the spring force of the closing spring.

In the state where the operation of the switch operating device shown in FIG. 7 is stopped, the first support is provided to prevent the spring force of the closing spring 30 from being released even if the closing spring 30 is operated for an unexpected reason. The first safety pin 14 is inserted into the hole 11 a provided in the lever 11. Although closing operation in the hole 11a Which position is more disposed to be stopped and inserted into the hole closest to the end portion 21 ₃ of the second supporting lever 21. Similarly, the safety pin 24 is inserted into the hole 21 a provided in the second support lever 21. Thus suddenly also the closing spring is operated to the first safety pin 14 branching portion 21 ₃ of the second supporting lever 21 immediately abutting likewise branch portion 11 ₃ of the first supporting lever 11 to a second safety pin 24 Immediately contact each other, and the opening force of the closing spring 30 is restrained. Because of the safety pins 14 and 24, the operator can safely attach and remove the feed bolt 31 and the feed nut 33.

  Next, the feed bolts 31 are respectively inserted from the holes 22b provided on both sides of the second spring receiver 22 and not provided with screw grooves, and the tip ends of the feed bolts 31 are screw holes 12b of the first spring receiver 12. Screw in until it sticks out sufficiently. A fixing nut 32 is fastened to a portion protruding from the first spring receiver 12, and each feed bolt 31 is fixed so as not to rotate.

  Then, after fitting the ring 34 from the upper end of each feed bolt 31, the feed nut 33 is screwed into the feed bolt 31, and the second spring receiver 22 is tightened by each feed nut 33. Then, the closing spring 30 is compressed between the first spring receiving body 12 and the second spring receiving body 22, and the spring force is restrained between the first spring receiving body 12 and the second spring receiving body 22. . FIG. 8 shows this state. In the state shown in FIG. 8, since the spring force does not act on the fixed shaft 2 and the crank lever pin 6, the closing spring portion 10 can be easily detached from the operating device.

  In FIG. 8, since a gap 21b is formed between the second support lever 21 and the second spring receiving body 22, a second spacer 23 for adjusting the spring force can be inserted into the gap 21b. At that time, as shown in FIG. 3, the hole 23 a of the second spacer 23 is disposed so as to fit into the protrusion 22 c provided on the second spring receiver 22. In a state where the hole 23 a of the second spacer 23 is fitted into the protrusion 22 c of the second spring receiver 22, the second spacer 23 does not come off from the second spring receiver 22.

Further, in the state of FIG. 8, since a gap is formed abutment between a little lifting the closing spring unit 10 and the branch portion 11 ₃ of the first supporting lever 11 first spring receiving body 12, a branching unit 11 ₃ Similarly, the first spacer 13 for adjusting the spring force can be inserted between the second spring receiving body 12 and the second spring receiving body 12. When the feed nut 33 is loosened after the first spacer 13 and the second spacer 23 are inserted, the state shown in the schematic diagram of FIG. 1 is obtained.

  FIG. 9 shows a state in which parts from the switch operating device to the feed bolt 31 to the ring 34 which are closing spring restraining means are removed. In the state of FIG. 9, the use height of the closing spring 30 is lower and the spring force is larger than the state of FIG. 7 by the thickness of the first spacer 13 and the thickness of the second spacer 23. I understand that. As described above, the spring force of the closing spring 30 can be adjusted by inserting the first spacer 13 and the second spacer 23 or changing the thickness of the inserted first spacer 13 or second spacer 23. .

  In the first embodiment, the example in which the screw hole 12b is provided in the first spring receiver 12 and the hole 22b in which no screw groove is provided in the second spring receiver 22 has been described. A hole 22b that is not provided with a thread groove may be provided in both of the second spring receivers 22, and nuts may be tightened at both ends. Further, a screw hole may be provided instead of the hole 22b provided with no thread groove provided in the second spring receiving body 22. The point is that when the closing spring 30 is compressed, the spring force can be reliably restrained between the first spring receiving body 12 and the second spring receiving body 22 by bolts and nuts.

(effect)
As described above, according to the first embodiment, the feed bolt 31 can be fixed without using a dedicated jig that requires a large spring force of the closing spring in a narrow operating device space in which many parts are incorporated. With the simple closing spring restraining means comprising the nut 32, the feed nut 33, the ring 34, etc., the closing spring 30 can be safely restrained, and the removing operation of the closing spring portion 10 can be easily performed. During this operation, the first safety pin 14 and the second safety pin 24 are inserted into the holes 11a and 21a formed in the first support lever 11 and the second support lever 21, respectively, thereby unexpectedly releasing the closing spring 30. The closing spring restraining means can be safely attached to the force. Furthermore, the spring force can be constrained even when the closing operation is stopped halfway.

  Further, the first support lever 11 and the first spring receiver 12 are in contact with each other, and the second support lever 21 and the second spring receiver 22 are in contact with each other without taking out the closing spring portion 10 to the outside. By inserting the spacer 13 and the second spacer 23, the spring force of the closing spring can be adjusted. In addition, the first spring receiver 12 and the second spring receiver 22 are provided with projections 12c and 22c, respectively, and these projections 12c and 22c are fitted into the holes 13a and 23a, respectively. The second spacer 23 can be prevented from falling off due to vibration or the like, and a highly reliable operating device can be provided.

  Furthermore, by inserting the ring 34 between the feed nut 33 and the second spring receiver 22, the feed nut 33 can be smoothly rotated even when the spring force is high. Further, by disposing the projections 12d and 22d on the inner diameter side of the closing spring 30 of the first spring receiving body 12 and the second spring receiving body 22, respectively, the displacement of the closing spring 30 can be prevented and the first spring The section modulus of the receiving body 12 and the second spring receiving body 22 is increased, the strength against bending is improved, and deformation when the spring force is constrained by the feed bolt 31 and the feed nut 33 can be prevented.

[Embodiment 2]
Next, the switch operating device according to the second embodiment will be described with reference to FIGS. 10 and 11.
FIG. 8 is a front view showing a part of the switch operating device and corresponds to FIG. FIG. 11 is a CC arrow view of FIG. 10 and corresponds to FIG. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or similar, and the overlapping description is abbreviate | omitted.

In the case of the above-described first embodiment, as shown in FIG. 1 and the like, the protrusions 12c and 12d and 22c and 22d in an independent state are provided on both sides of the first spring receiver 12 and the second spring receiver 22, respectively. In the second embodiment, the bolt 41 is screwed from the four locations on the closing spring contact surface side of the first spring receiver 12 and the second spring receiver 22 through the cylindrical collar 40 to the cylindrical collar 40. to have a deviation preventing function of the closing spring 30, also the first spacer 13 have a detachment prevention function of the second spacer 23 by screwing the nut 42 to the tip of the bolt 41 that protrudes bifurcation 113,21 _T side It was made to let you.

  In addition, since the attachment method of the 1st spacer 13 and the 2nd spacer 23 is performed in the procedure similar to Embodiment 1, detailed description is abbreviate | omitted.

  Needless to say, the second embodiment configured as described above can achieve the same effects as those of the first embodiment. Furthermore, according to the second embodiment, the first spring receiver 12 and the second spring receiver 22 can be manufactured by processing from a plate material, which contributes to cost reduction. In addition, the cylindrical collar 40 can be replaced with a plurality of flat washers and the like, which further contributes to cost reduction.

[Embodiment 3]
Next, the switch operating device according to the third embodiment will be described with reference to FIG.
FIG. 12 is a cross-sectional view of the switch operating device corresponding to FIG. 4, and the same or similar parts as those in the second embodiment are denoted by the same reference numerals, and redundant description is omitted.

In the third embodiment, as shown in FIG. 12, the cylindrical collar 40 shown in FIG. 10 of the second embodiment is changed to an arcuate collar 43. Other bolts 41 and nuts 42 are the same as those in the second embodiment. Therefore, explanation is omitted.
Of course, in the third embodiment, the same effects as those of the first and second embodiments can be obtained.

  DESCRIPTION OF SYMBOLS 1 ... Frame of switch operating device, 2 ... Fixed shaft, 3 ... Cam, 4 ... Cam shaft, 5 ... Crank lever, 6 ... Crank lever pin, 10 ... Closing spring part, 11 ... First support lever, 11a ... Hole , 12 ... 1st spring receptacle, 12a ... Rectangular hole, 12b ... Screw hole, 12c ... Projection, 12d ... Projection, 13 ... 1st spacer, 13a ... Hole, 14 ... 1st safety pin, 21 ... 2nd support lever 21a ... hole, 21b ... gap, 22 ... second spring receiver, 22a ... rectangular hole, 22b ... non-threaded hole, 22c ... projection, 22d ... projection, 23 ... second spacer, 24 ... second Safety pin, 30 ... closing spring, 31-34 ... closing spring restraining means, 31 ... feed bolt, 32 ... fixing nut, 33 ... feed nut, 34 ... ring, 40 ... cylindrical collar, 41 ... bolt, 42 ... nut, 43: Arc-shaped collar.

Claims (6)

In an operating device for a switch that opens and closes a circuit by driving a movable contact of the switch to a breaking position or a closing position,
A pair of first support levers made of a member having one end rotatably fitted to a fixed shaft provided projecting from the frame of the switch operating device and a stopper formed on the other end;
A cam shaft having an end projecting from the frame at a predetermined distance from the fixed shaft;
A pair of second support levers made of a member having one end rotatably fitted to a crank lever pin on a crank lever provided at an end of the cam shaft and a stopper formed on the other end;
A hole that penetrates the first support lever is formed at the center, a hole that is not provided with a screw hole or a screw groove is formed at both ends, a spacer positioning portion is formed on one side, and a hole is formed on the other side. A first spring receiver that forms a positioning portion for a closing spring;
A hole that penetrates the second support lever is formed at the center, a hole or a screw hole that is not provided with a thread groove is formed at both ends, a spacer positioning portion is formed on one side, and a hole is formed on the other side. A second spring receptacle that forms a positioning portion for the closing spring;
A closing spring for applying a spring force to the fixed shaft and the crank lever pin via the first support lever and the second support lever,
Between the members of either the first support lever or the second support lever so that the closing spring is disposed between the first spring receiver and the second spring receiver. A switch operating device characterized in that the other support lever is inserted and arranged.   The switch operation according to claim 1, wherein a plurality of holes are provided in each of the first support lever and the second support lever, and a first safety pin and a second safety pin can be inserted into the holes, respectively. apparatus.   A spacer for adjusting spring force is disposed at a contact position between the first spring receiver and the first support lever or a contact position between the second spring receiver and the second support lever. The switch operating device according to claim 1. In place of the spacer positioning portion and the closing spring positioning portion provided on the side surfaces of the first spring receiving body and the second spring receiving body, bolt fastening in which collars are sandwiched between the first spring receiving body and the second spring receiving body, respectively. The switch operating device according to any one of claims 1 to 3 , wherein a portion is arranged to cause the bolt fastening portion to function as a spacer positioning portion and a closing spring positioning portion.   2. The switch operating device according to claim 1, wherein a bolt is attached to a hole or a screw hole formed so as to penetrate the first spring receiver and a hole or screw hole formed so as to penetrate the second spring receiver. An operation for a switch, characterized in that a force to stretch the closing spring is constrained between the first spring receiver and the second spring receiver by passing through and screwing a nut into the bolt. A method of restraining the closing spring of the device. The restraint of the closing spring of the switch operating device according to claim 5, wherein a ring having a slip characteristic is inserted in a contact surface between the nut and the first spring receiver or the second spring receiver. Way .

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