JPH065160A - Operation mechanism for change over switch - Google Patents

Abstract

PURPOSE:To prevent futile stroke of a spring closing mechanism caused by re-closing operation of a contact mechanism in a closed condition by preventing a closing spring release arm from being affected by the operation of an closing slide even when the closing operation is futher tried for the contact mechanism in the side that is in a closed condition. CONSTITUTION:A closing shaft 58 is turned clockwise, and an operation arm 75 is turned clockwise by an operation link shaft 73 through an operation link 72 while the arm is moved upward. Since a cross bar 16 is also turned clockwise by the clockwise turning of the operation arm 75, a first toggle link 14 is turned clockwise through an arm 15 and a pin 23. A moving contact support member 12 is turned anti-clockwise thereby through a shaft 19, a second toggle link 13 and a shaft 17. A moving contact 7 connected with a moving contact support member 12 is turned counter clockwise, while a moving contact point 6 provided on the moving contact 7 is released from a fixed contact 5 and is thus opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching mechanism for selectively switching a proper power source from a normal power source and a standby power source to supply power to a load, and in particular, a spring actuating mechanism for a closing operation mechanism. The present invention relates to an operation mechanism of a conversion switch having a switch.

[0002]

2. Description of the Related Art A conventional switching switch is a so-called seesaw type in which one of the contact on the normal side and the contact on the standby side is always in the open state, but recently, in order to enhance safety, Has two sets of contact mechanisms that are independently opened and closed so that both contacts can temporarily have an open position which is an open position. Those having a common single dosing mechanism have become popular.

However, such a conventional one is generally an electromagnetic contactor system in which a contact mechanism is directly closed by a solenoid, and a spring-in system like the present invention does not exist. . At the same time, in such a conversion switch, the one with a spring closing mechanism in the closing operation mechanism is capable of high speed closing, and the closing speed and throwing input are constant regardless of the operating voltage, and safe closing is possible. It is particularly preferable because of the fact that the operation can be performed and the operation current for making operation is small.

[0004]

The spring closing mechanism of the conversion switch releases the energy of the stored closing spring to close the opening / closing mechanism. In the case of the conversion switch, the closing spring releases the closing spring. When the normal side or standby side contact mechanism is closed and immediately after that, the closing spring is re-energized by the electric closing mechanism for electric power as long as the normal voltage exists, so that the next closing can be performed. To wait.

As described above, if any one of the contact mechanism is accidentally further closed during the closing operation, the closing spring is released again, and the closing spring is independently operated without the operation of the contact mechanism. Since it is in a so-called "null driving" state in which energy is released, an excessive mechanical shock occurs, which is not preferable. Also, in the case of a conversion switch, since it is usually an electric operation, "blank hit" can be prevented by taking an electrical interlock using a limit switch, but if a manual operation mechanism is added Therefore, it is necessary to prevent the manual input operation in such a state.

An object of the present invention is, in order to solve such a problem in the prior art, a conversion capable of preventing "idle driving" of a spring closing mechanism caused by a re-closing operation during closing of a contact mechanism. It is to provide an operating device for a switch.

[0007]

In order to achieve the above-mentioned object, according to the present invention, the operating device of the conversion switch selects either one of the normal side contact mechanism and the spare side contact mechanism. In a conversion switch that is closed by a single spring closing mechanism, a pair of closing electromagnets is provided on each of the normal side and the standby side, and has an engaging portion at one end, and the other end extends from the spring closing mechanism. An operation link rotatably supported at one end of the closing arm and biased to an intermediate position between the two contactor mechanisms by a spring at an open position, and contact between the working side and the spare side By a swinging action, a pair of symmetrically arranged operation arms, which are directly connected to the child mechanism, face the operation link on both sides of the operation link, and each have an engaging portion at the tip, Of the operation link A swinging mechanism for selectively engaging the joint portion with the engaging portion of the operating arm on the regular side or the spare side, a release driving mechanism operated by the closing electromagnet, and a closing spring provided in the spring closing mechanism. Is temporarily stored in a stored state, and has a closing spring holding / releasing mechanism for releasing the restraint of the closing spring in the stored state at the time of closing, and either the normal side or the spare side at the time of closing. The swing mechanism and the operating link are swung by the respective movable rods that are activated when the closing electromagnet on the selected side is excited, and the engaging portion of the operating link and the engagement of the operating arm on the selected side are rocked. Engage the joint, mechanically couple the contactor mechanism and the spring closing mechanism on the selected side, and subsequently operate the closing spring holding / releasing mechanism to pre-store the energy. Of the spring loading mechanism The closing spring is released, the closing shaft of the spring closing mechanism is rotated to cause the closing arm, the operation link and the operation arm to respond, and the contact mechanism of the selected side is closed and the closing side of the other side is closed. An operation mechanism interlocked so that the closing electromagnet cannot be closed by the swinging mechanism, wherein the release driving mechanism of the closing spring holding / releasing mechanism is configured to operate when any one of the closing electromagnets operates. With a closing slide common to the working side and the spare side that always moves in a fixed direction in conjunction with the moving rod of the closing electromagnet,
A slide head having one end rotatably connected to the leading end of the closing slide and the other end facing a closing spring releasing arm extending from the releasing drive mechanism, and the slide head and the closing shaft of the spring closing mechanism connected to each other. The link member that responds to the rotation of the closing shaft rotates the slide head to move the facing position of the slide head and the closing spring releasing arm, and It is characterized in that the operation of the closing slide does not act on the closing spring releasing arm even when the closing operation is further tried to the contact mechanism.

The operating mechanism of the conversion switch according to the present invention is
When the closing operation is performed when both the power source side contact mechanism and the spare side contact mechanism are both in the open position, the closing slide that moves in a certain direction regardless of which side the closing operation is performed and the slide attached to this closing slide. The head moves, the closing spring releasing arm is operated, and the closing spring holding / releasing mechanism is further released to release the closing spring and close the contactor mechanism. The contact mechanism on the other side is interlocked by the operation of the slide plate of the swing mechanism so that it cannot be closed. Further, when the closing operation is further performed on the contact mechanism on the side that has already been closed, the slide head is rotated by the link member connected between the closing shaft and the slide head. The slide head does not engage the closing spring release arm when the closing slide moves. Because of this, the closing spring is not released.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a three-pole conversion switch according to the present invention is shown in FIGS. First, the schematic structure and operation of the conversion switch according to the present invention shown in FIGS. 1 and 4 will be described. The conversion switch according to the present invention includes a contact device A, a spring loading mechanism B, and a contact device. It is mainly composed of a child mechanism A and a selection mechanism portion C arranged in the middle of the spring closing mechanism B. The contact mechanism A is constructed on the conductive portion base 2 made of an insulating material, and the spring input mechanism B and the selection mechanism portion C are constructed on the mechanism base 3, respectively.
The mechanism base 3 is attached to the pair of attachment legs 1.
As shown in the figure, the contactor device A includes a fixed contactor 5 which also serves as a pair of power supply side terminals corresponding to the normal side and the spare side, and a single load side terminal for each of the R, S and T poles. 11, 1
1 ′, 11 ″, a conductive portion P including a pair of opening / closing contacts corresponding to the normal side and the spare side, and a pair of opening / closing mechanisms Q, each of which is provided from the selection mechanism section C and the opening command mechanism F. The contacts open and close according to the closing and opening commands.

Further, the spring closing mechanism B is, as shown in the drawing, a throwing force storing mechanism D for storing contact throwing force in the closing spring,
It comprises a closing spring holding / releasing mechanism E which holds and releases the throwing force and holds the closing state. An opening command mechanism F for commanding the contact opening of the contact mechanism A is arranged in the space of the spring closing mechanism B. Further, the selection mechanism section C includes a pair of closing command mechanisms G corresponding to the normal side and the spare side, and a throwing input including an operation link 72 for transmitting the throwing force stored in the spring closing mechanism B to the contact mechanism A. It has a transmission mechanism I, a swing mechanism H that guides the operation link 72 to the side according to the command, and a release drive mechanism J that transmits the closing command to the spring closing mechanism B.

Between the contact mechanism A and the selection mechanism C described above, a pair of crossbars 16 corresponding to the normal side and the spare side,
16 ', and the selection mechanism section C and the spring closing mechanism B are connected by a closing link shaft 54 and a closing shaft 58. In such a configuration, the closing command mechanism G operates the swinging mechanism H by a closing command, swings the operation link 72 to connect the contact mechanism A and the spring closing mechanism B, and then the release driving mechanism. When J is operated, the closing link shaft 54 is rotated to release the closing spring holding / releasing mechanism E, and the released throwing force is selected via the closing shaft 58 and the throwing force transmitting mechanism I. Is transmitted to the crossbar 16 or 16 'on the side of, and the contact on that side is closed.

Next, the detailed structure of the conversion switch according to the present invention will be described. In the figure, the right side and the left side are assumed to be the regular side and the preliminary side, respectively, for the portion where the regular side and the spare side are paired left and right. Contact device A is shown in FIGS. The following description will be made mainly on the regular side. As illustrated, the conductive portion P of the contact mechanism A is
A fixed contact 4 provided at one end of a fixed contact 5 also serving as a power source side terminal, and a movable contact 6 capable of coming into contact with and separating from the fixed contact 4.
And a flexible conductor 9 having one end connected to the tail end of the movable contact 7 and the other end connected to one end of the connection terminal 8. Further, the other ends of the connection terminals 8 on the service side and the backup side are common to the service side and the backup side, and are connected to each pole through a single relay terminal 10, 10 ', 10 ". It is connected to one load side terminal 11, 11 ', 11 ". The opening / closing mechanism Q of the contactor mechanism A includes a movable contactor support member 12, a second toggle link 13, a first toggle link 14, an arm 15 and a crossbar 16. The movable contactor 7 is coupled to the movable contactor support member 12 by a shaft 17, and is rotated as the movable contactor support member 12 pivotally supported by a fixed rotating shaft 18 is rotated. The movable contact support member 12 is connected to the second toggle link 13 by the shaft 17, and the second toggle link 13 is connected to the upper first toggle link 14 by the shaft 19. The arm 15 is pivotally supported by the fixed rotation shaft 20 together with the first toggle link 14, and the crossbar 16 for interlocking the opening / closing mechanism Q and the selection mechanism C of each pole is attached by a screw by the crossbar clamp 21. I'm sick. Arm 15
Has a U-shaped notch 15a formed at its tip and engages with a pin 23 arranged on the first toggle link 14 so as to penetrate an arcuate slot 22a formed on the fixed frame 22. The operation of the cross bar 16 that rotates around the fixed rotation shaft 20 is transmitted to the first toggle link 14 in unison. In addition, the shaft 19 has a regular side and a spare side,
A single breaking spring 24 is stretched for each pole via an appropriate mounting member.

As shown in FIGS. 5 and 7 to 11, the spring closing mechanism B is constructed on a pair of mechanism frames 25, 25 ′ attached to the mechanism base 3. Mainly, as shown in FIG. 5, FIG. 7 and FIG. 8, the throwing-and-accumulating mechanism D is a mechanism for accumulating the closing spring 26 including a main closing spring 26a and an auxiliary closing spring 26b. A crank lever 28, a pair of charge levers 29, and a gear 30 sandwiched between the pair of charge levers 29 are fixed to the cam shaft 27 rotatably mounted on the mechanism frames 25 and 25 'on the outside of the mechanism frame 25. In addition, the closing cam 31 is fixed between the mechanism frames 25 and 25 ', and the crank lever 28' is fixed outside the mechanism frame 25 '. Further, a closing holding latch 32 is rotatably supported between the mechanism frame 25, the closing cam and the closing cam 31. The main closing spring 26a and the auxiliary closing spring 26b are stretched between a single crank shaft 33 loosely attached to the elongated fixing groove 46 and a fixed shaft 34 and a fixed shaft 35, respectively. Since the shaft 36 eccentrically planted in the crank levers 28, 28 'is connected to the crank shaft 33 via the pair of crank plates 37, the cam shaft 27 has a rotational force due to the stored force of the closing spring 26. Are added via the crank lever 28.

The charge lever 29 transmits the driving force of the motor 38 to the gear 30, and one end thereof has the motor 38.
Is engaged with and engaged with a motor crank roller 40 which is eccentrically mounted on a gear mechanism 39 for reducing the rotation of the motor and is rotatably mounted. The charge lever 29 rotates clockwise when the motor 38 rotates and the motor crank roller 40 moves from the bottom dead center to the top dead center shown by the alternate long and short dash line in FIG. When moving to a point, the charge lever spring 41 can perform a reciprocating motion of rotating counterclockwise. At the other end of the charge lever 29,
The feed claw 42 is rotatably supported by a shaft, and is pressed and engaged with the teeth of the gear 30 by a spring 43. Further, as indicated by the one-dot chain line in FIG. 8, when the charge lever 29 rotates clockwise, the gear 30 is rotated clockwise. In order to prevent reverse rotation of the gear 30 when the charge lever 29 rotates counterclockwise, a fixed pawl 44 is rotatably supported by a fixed shaft and press-engages with teeth of the gear 30 by a spring 45. Is provided. The gear 30 can be rotated by one tooth by one reciprocating operation of the charge lever 29. still,
The energy storage operation can be performed manually by pumping the manual charge handle 47.

The closing spring holding / releasing mechanism E is shown in FIGS. 5 and 9 to 11. In FIG. 9, the closing cam 31
An accumulating force holding roller 48 is rotatably supported on the fixed rotation shaft 49, and a charge latch 50 biased counterclockwise by a spring 70 is supported on the fixed rotation shaft 49. When the closing spring 26 is energized, the closing cam 31 is rotated clockwise, and the energizing force holding roller 48 is engaged with the charge latch 50 to be in the state of FIG. At this time, charge latch 5
Since 0 is engaged with the semicircular portion of the charge latch receiving shaft 51 which is the fixed rotation shaft, the accumulating force of the closing spring 26 is held. Further, a first closing link 52 is fixed to the charge latch receiving shaft 51, is biased counterclockwise by a spring 53, and a second closing link 55 fixed to a closing link shaft 54 at one end is loosened via a pin 56. It is fitted and connected.
The closing link shaft 54 is a fixed rotation shaft, extends to the selection mechanism portion C, and is rotated by a release driving mechanism J described later.

As shown in FIG. 4 and FIG. 5, the first closing arm 57 is fixed between the mechanism frame 25 and the selecting mechanism frame 78 'across the spring closing mechanism B and the selecting mechanism portion C. A loading shaft 58 is rotatably provided. As shown in FIG. 11, the first loading arm 57 includes
An insertion holding roller 59 and a pin 60, which are rotatably supported, are attached. Since the opening assist lever 62 biased counterclockwise by the opening assist spring 61 is engaged with the pin 60, the first loading arm 57 is biased clockwise and is in a state before loading. The lower end of the first loading arm 57 contacts the mechanism base 3 and is stationary.

The release driving mechanism J operates to rotate the charge latch receiving shaft 51, and the charge latch 50 causes the closing cam 3 to move.
When the restraint state of 1 is released, the closing cam 31 rotates clockwise. The closing cam 31 rotates the first closing arm 57 and the closing shaft 58 counterclockwise by pressing the closing holding roller 59 with the peripheral edge 31a in the initial stage of rotation and the maximum rotating radius peripheral edge 31b in the final stage. Then, the throwing input can be transmitted to the selection mechanism section C. Further, the closing and holding latch 32 pivotally supported by the camshaft 27 is provided.
Is biased counterclockwise by the latch spring 63, and the lower peripheral edge of the closing and holding latch 32 is always in contact with the closing and holding roller 59. Further, as shown in FIG. 9, the upper end of the closing and holding latch 32 can be stationary by being engaged with the semicircular portion of the closing and holding latch receiving shaft 64 in the closing state. Close-up holding latch support shaft 64
Is a fixed rotation shaft, to which an open piece 65 bent in an L shape is fixed, and is biased counterclockwise by a spring 66. In FIG. 9, as the opening command mechanism F, the trip electromagnet 67 common to the regular side and the standby side rotates the open piece 65 clockwise when the coil of the electromagnet 67 is excited and the trip bar 68 moves to the right. It is arranged so that the engagement between the semicircular portion of the closing and holding latch receiving shaft 64 and the closing and holding latch 32 is released. Further, a manual release button 69 is provided on the release command mechanism F.

The selection mechanism section C is shown in FIG. 5 and FIGS.
4 is shown. As shown in FIG. 12, a pair of closing command mechanisms G corresponding to the regular side and the spare side are provided in the upper half,
The swinging mechanisms H are arranged in the lower half substantially symmetrically with each other, and the release mechanism driving mechanism J is arranged in the lowermost part. Further, the throwing power transmission mechanism I is arranged from the lower half to the upper half. The throwing input transmission mechanism I includes a closing shaft 58 extending from the spring closing mechanism B, a second closing arm 116 fixed to the closing shaft 58, and an operation link 72 connected to the second closing arm 116 via a shaft 71. An operation link shaft 73 provided at the other end of the operation link 72, an operation link shaft spring 74 stretched between the operation link shaft 73 and a fixed shaft, a cross bar 16 extending from the contact mechanism A,
16 'and a pair of operation arms 75, 75' corresponding to the normal side and the spare side directly connected to the contact mechanism A. The operation link shaft 73 is an engaging portion provided at one end of the operation link 72, and includes the operation arms 75 and 7.
5'can be engaged.

As shown in FIG. 13, the operation link shaft 73 is biased by the tension of the operation link shaft spring 74 to the middle between the normal side and the spare side when both the normal side contact and the spare side contact are open. By the operation of the swinging mechanism H in response to the closing command, the swinging mechanism H is selectively swung to the normal side or the spare side, as shown in FIG.
Engagement portion 7 having a U-shaped notch formed at the tip of 5 '
5a and 75'a can be engaged. Operation arm 7
5, 75 'are rotatably supported by fixed rotating shafts 76, 76' arranged concentrically with the fixed rotating shaft 20 of the contact mechanism A,
Crossbar 16, 16 'is crossbar clamp 77, 7
It is screwed on by 7 '. When the closing shaft 58 rotates counterclockwise and the operation link shaft 73 moves downward from the state where the operation link 72 in FIG. 15 swings, the small diameter portion 73a formed at both ends of the operation link shaft 73.
In order to guide each of the selection mechanism frames 78, 78 ', an operation link shaft guide 79 is mounted inside each of the selection assisting frames 118, 118' fixed to the outside.
Each operation link shaft guide 79 is a W-shaped sheet metal having a pair of narrow grooves 79a and 79'a corresponding to the normal side and the spare side.

The closing command mechanism G has both an electric operation mechanism and a manual operation mechanism for each of the regular side and the spare side. The electromagnets 80, 80 'for making electric operations are exciting coils 81, 81', fixed iron cores 82, 82 ', movable iron cores 83, 83', and rod-like movable iron cores fixed to the movable iron cores 83, 83 '. It is composed of rods 84, 84 'and is mounted on a selection mechanism base 85 bridged to the selection mechanism frames 78, 78' shown in FIG. The movable iron cores 83 and 83 'are biased upward by springs 86 and 86', and are ring-shaped stoppers 87 fixed to the movable rods 84 and 84 '.
87 'abuts on the lower surfaces of the fixed cores 82, 82' and is stationary. Further, the stoppers 87, 87 'are the movable rod 8
The movable rods 84 and 8 are inserted into the movable rods 84 and 8 '.
There is a step between 4 '. Movable rod 84, 84 '
Rollers 88, 88 'for actuating a swinging mechanism H, which will be described later, are rotatably and pivotally supported at the central portion of the.

In the electric operation, the movable iron core 83 or 8 of the closing electromagnet 80 or 80 'according to the closing command.
3'is attracted by the fixed iron core 82 or 82 ', and the movable rod 84 or 84' is moved by the swing mechanism H and the release drive mechanism J.
Operate. Manual operation manual input button 89, 89 '
The thrust plates 90, 90 ′ mounted with are rotatably supported by the fixed rotation shaft 91. The veneer plates 90, 90 'are biased counterclockwise on the regular side and clockwise on the standby side by springs (not shown). When the manual input button 89 or 89 'is pushed, the veneer 90 or 90' pushes down the movable iron core 83 or 83 ', and the swinging mechanism H and the release driving mechanism J are operated in the same manner as the electric operation.

The swing mechanism H is constructed on the selection mechanism base 85, and has a single slide plate 94, a selection shaft 95, and first selection levers 96, 9 corresponding to the normal side and the spare side.
6 ', and second selection levers 97, 97' corresponding to the regular side and the spare side. The slide plate 94 has a substantially rectangular shape as shown in FIGS.
The central portions of the long sides are bent at a right angle so as to face each other, and axial holes 94a are formed in each, and a flat portion thereof has a pair of holes 94b, 94b 'corresponding to the regular side and the spare side. Cut and bent portions 94c and 94c 'are formed. The slide plate 94 is slidably mounted in the gap between the selection mechanism base 85 and the selection mechanism side plate 100 mounted via the spacer 99. The charging electromagnets 80 and 80 'are mounted so that the movable rods 84 and 84' penetrate the pair of holes 94b and 94b '. First bent in U-shape
Selection levers 96, 96 'and second selection levers 97, 97'
Is rotatably supported by the fixed rotation shaft of the selection mechanism side plate 100.

As shown in FIGS. 13 and 14, when both contacts of the contact mechanism A are open, the slide plate 94 is located between the normal side and the spare side, and the first selection levers 96, 96. 'One end of each roller 88, 88'
To the second selection lever 97,
It is oppositely engageable with one end of 97 '. The second selection levers 97 and 97 'are biased clockwise by the springs 98 and 98' on the regular side and counterclockwise on the reserve side, respectively, so that the other ends of the second selection levers 97 and 97 'are cut and bent 94c of the slide plate 94. ,
It is stationary and engaged with 94c '. Shaft hole 9 of slide plate 94
A selection shaft 95 is attached to 4a. This selection axis 95
Is engaged with a long groove 72a formed in the central portion of the operation link 72, and the second selection lever 9 in response to a closing command.
When the slide plate 94 is slid to the right or left by the rotation of 7 or 97 ', the operation link 72 is swung right or left around the shaft 71. Further, the first selection levers 96 and 96 'are provided with rotation avoidance portions 96a and 96a'.

Rollers 88, 8 of movable rods 84, 84 '
8'and the first selection lever 96, 96 'and the second selection lever 9
As shown in FIG. 22, 7, 97 'are configured as follows when explained on the regular side. That is, as shown in FIGS. 22 to 23, the first selection lever 96 on the regular side engages with the second selection lever 97 on the regular side in a clockwise direction by a slight stroke immediately after the start of the operation of the movable rod 84. The second selection lever 97 on the regular side is rotated and as shown in FIG.
When the slide plate 94 is slid to the right by the rotation of
The spare second selection lever 97 ′, which is interlocked counterclockwise by the cut-and-bend portion 94c ′ of the slide plate 94, is not interfered with by the spare first selection lever 96 ′.
It is necessary to satisfy the following two operation conditions. for that reason,

1) In order to satisfy the conditions, the clearance "g" between the roller 88, the first selection lever 96 and the second selection lever 97 before the operation of the movable rod 84 on the regular side is started is shown in FIG.
It is reduced as shown in. 2) First selection lever 96 and second selection lever 9 on the regular side
7 of the respective rotation centers K and L, and the engagement point M of the first selection lever 96 and the second selection lever 97.
The KML consists of a movable rod 8 as shown in FIGS.
4 increases, that is, the engagement point M is always above the straight line KL. In this case, the movable rod 8
4, the first selection lever 96 on the regular side is rotated counterclockwise, is engaged with the second selection lever 97 at the point M, and the second selection lever 97 is rotated clockwise. Although the slide plate 94 is slid to the right and the spare second selection lever 97 'is rotated clockwise, the second selection lever 9'
Since there is a gap "G" between 7'and the first selection lever 96 ', this series of operations is performed without any problem. 3) After the swing motion is completed, in order to prevent excessive sliding of the slide plate 94, at the end of the operation stroke of the movable rod 84, as shown in FIG.
The tangent line between the rotation avoiding portion 96a of the first selection lever 96 and the roller 88 prevents the movable rod 84 from rotating further.
Will be parallel to.

A pair of holes 94 in the flat portion of the slide plate 94
18 and 21, b and 94b 'are composed of two parts having different widths, and the inner part 94d, 94d' can be penetrated by the stopper 87 of the movable rod 84, and the outer part 94d.
The widths e and 94e 'cannot penetrate. That is, as shown in FIGS. 18 and 19, when any of the contacts is open, the inner portions 94d and 94d ′ of the wide holes correspond to the stoppers 87 and 87 ′, so that both the regular side and the spare side are The movable rods 84, 84 'of FIG. On the other hand, in the state where one of the regular side and the spare side is in the process of being input, or in the state of being input, even if the slide command is erroneously given to the other due to the state where the slide plate 94 is sliding to one side, Movable rods 84, 84 'stoppers 87, 8
7'does not operate by colliding with the outer portion 94e or 94e 'of the wide hole, so that incorrect insertion can be prevented. 20 and 21 are diagrams for explaining this state, and show the state in which the standby side is given a closing command while the regular side is making the closing.

The release driving mechanism J includes a pair of deflection plates 101, 101 'corresponding to the normal side and the spare side, a single closing slide 102, a slide head 103, a slide head link 104, and a spring release arm 105. And a lever 106. Deflection plates 101, 10
1'is rotatably supported by a fixed rotation shaft and faces the tips of the movable rods 84, 84 'so that it can rotate counterclockwise when the corresponding closing electromagnet 80 or 80' is operated. A roller 107 and a slide head 103 are rotatably attached to one end of the closing slide 102 via a shaft 108, the roller 107 and the shaft 108 are guided by a guide plate 109 that is bent in a U shape, and the other end is fixed. A lever 110 pivotally supported by a moving shaft is pivotally supported by the tip of the lever 110.
For this reason, the closing slide 102 can slide in the left and right directions, and is normally biased to the left by the spring 111. The closing slide 102 has a pair of closing slide protrusions 1 bent into an L shape corresponding to the normal side and the spare side.
12, 112 'are fixed to the deflecting plates 101, 101' so as to face each other, and when the deflecting plate 101 or 101 'is rotated counterclockwise, the closing slide 102 is slid to the right.

Since the roller 117 is rotatably supported by the slide head 103 and is biased clockwise by a spring (not shown), as shown in FIG.
In the open state of any of the contacts, the roller 117 is brought into contact with the mechanism base 3. For this purpose, the slide head 103
Has a tip facing the roller 113. Therefore, the roller 113 can be pressed when the closing slide 102 and the slide head 103 slide rightward as shown in FIG. The roller 113 is the input link shaft 5
Since it is attached to one end of the spring releasing arm 105 fixed to 4, the closing link 54 can be rotated counterclockwise as shown in FIG. 17 when pressed to the right.

On the other hand, a shaft 114 is provided in the middle of the deflection plate 101.
The slide head link 104 is connected via. The long hole 104 a formed at the other end of the slide head link 104 has a lever 1 fixed to the closing shaft 58.
The pin 115 planted in 06 is loosely connected. For this reason, in the state in which the closing shaft 58 is rotated counterclockwise, that is, in the closing state in which one of the contacts is closed,
As shown in FIG. 12, the pin 115 abuts on the upper end of the elongated hole 104a, and the closing connecting plate operating lever 104 rotates the slide head 103 counterclockwise about the shaft 108 so that the tip of the slide head 103 moves. It will not face the roller 113. For this reason, even if the closing slide 102 slides to the right, the slide head 103 escapes upward and the closing link shaft 54 cannot be rotated. This state is shown in FIG.

Next, the contact opening / closing operation of the conversion switch according to the present invention will be described. First, as shown in FIGS. 7 and 8, the energization of the closing spring 26 for energizing the throwing force causes the motor 38 (FIG. 9) to rotate in response to an electrical energization command, so that the motor crank roller 40 is eccentric. It is done by exercising. That is, the motor crank roller 4
The charge lever 29, which is in contact with 0 at one end, is rotated clockwise around the camshaft 27 until the motor crank roller 40 reaches the top dead center indicated by the dashed line, and the gear 30 is moved by the feed pawl 42. It is sent counterclockwise. The charge lever 29 is rotated counterclockwise by the charge lever spring 41 until the motor crank roller 40 passes through the top dead center and reaches the bottom dead center.
At this time, the gear 30 is prevented from being reversed by the fixed pawl 44.

By repeating this reciprocating motion, the shaft 36
Is rotated clockwise, the crankshaft 33 is moved leftward along the fixed groove 46 via the crank plate 37, and the closing spring 26 is expanded and accumulated. When the closing spring 26 is expanded to the maximum amount and the center of the shaft 36 crosses the line connecting the center of the cam shaft 27 and the center of the crank shaft 33, the stored force is slightly released, and the crank levers 28, 28 'are released. It is reversed so as to be rotated clockwise. At this time, FIG.
As shown in FIG. 5, the storage force holding roller 48 mounted on the closing cam 31 which is rotated together with the crank levers 28 and 28 'is engaged with the charge latch 50, and the charge latch 50 is connected to the charge latch receiving shaft. Since the semicircular portion of 51 is engaged, the energy storage force is retained and the energy storage is completed. At this time, the motor 3 is turned on by a limit switch (not shown).
8 is turned off, but the gear 3 corresponding to the feed claw 42
Since two teeth of 0 are missing, even if the charge lever 29 is further operated by inertia, the gear 30 is not rotated.

Next, referring to FIGS. 12 to 21, the closing operation will be described for the case where the normal side contact is closed by electric operation. First, in FIG. 13, when a signal for closing the normal side contact is applied, the exciting coil 81 of the closing electromagnet 80 is excited, and the movable iron core 83 as shown in FIG.
Is attracted by the fixed iron core 82 and moved downward, and the roller 88 mounted on the movable rod 84 moves to the first position during the movement.
The selection lever 96 is pressed and rotated counterclockwise. By this counterclockwise rotation of the first selection lever 96, the second selection lever 97 engages with the first selection lever 96 and is rotated clockwise, and the second selection lever 97 is cut and bent at the portion 94c. The slide plate 94 is slid to the right. At this time,
The spare side second selection lever 97 'is rotated clockwise by the cut-and-bend portion 94c' of the slide plate 94, but the spare side first selection lever 96 'does not move at all, so the slide plate 94 is moved to the right. Does not hinder sliding.

In this way, when the slide plate 94 moves to the right, the selection shaft 95 mounted on the slide plate 94 slides along the long groove 72a of the operation link 72 to move the operation link 72 around the shaft 71 in a clockwise direction. Rotate in the direction. As a result, the operation link shaft 73 attached to the operation link 72 is moved to a position where it can be engaged with the engaging portion 75a of the operation arm 75. In this state, the tip of the movable rod 84 rotates the deflection plate 101 counterclockwise, and the deflection plate 101 slides the closing slide 102 rightward via the closing slide protrusion 112. When the movable iron core 83 is further moved, the closing slide 102 is slid rightward as shown in FIG.
13, the spring releasing arm 105 equipped with the roller 113 is pressed and rotated counterclockwise together with the closing link shaft 54.

As shown in FIG. 11, the closing link shaft 54
When is rotated counterclockwise together with the second closing link 55, the first closing link 52 and the charge latch receiving shaft 51 are rotated clockwise through the pin 56. For this,
The semicircular portion of the charge latch receiving shaft 51 and the charge latch 50 are disengaged, and the charge latch 50 is rotated clockwise by the stored force of the closing spring 26 that is restrained by the stored force holding roller 48. The charge latch 50 and the stored force holding roller 48 are disengaged, and the storing force causes the closing cam 31 to rotate clockwise while pressing the closing holding roller 59 by the peripheral edge 31a. Therefore, as shown in FIG. 10, the closing holding roller 59 causes the peripheral edge 3 of the closing cam 31 to move.
As it moves from 1a to the maximum radius peripheral edge 31b, the closing shaft 58 is rotated counterclockwise.

At this time, the second closing arm 116 is rotated counterclockwise from the state shown in FIG. 15 together with the closing shaft 58, and the small diameter portion 73a of the operation link shaft 73 is moved via the operation link 72 to the operation link shaft guide 79. Guided by the narrow groove 79a, the operation link shaft 73 is moved downward to the state shown in FIG. When the operation link shaft 73 is moved downward,
The operation link shaft 73 is the engagement part 7 of the operation arm 75 on the regular side.
5a and the cross bar 16 together with the operation arm 75.
Is rotated counterclockwise around the fixed rotation shaft 76. As a result of this rotation, as shown in FIG.
The arm 15 on which is mounted is rotated counterclockwise together with the first toggle link 14 via the pin 23, and the movable contactor support member 12 is fixed to the fixed rotation shaft 18 via the second toggle link 13. When the movable contact 6 of the movable contact 7 mounted on the movable contact support member 12 is rotated clockwise, the movable contact 6 comes into contact with the fixed contact 4 and enters the closed state.

In this closing process, as shown in FIG. 11, when the first closing arm 57 is rotated counterclockwise, the closing holding latch 32 is also rotated counterclockwise by the latch spring 63. Once, as shown in FIG. 10, the closing holding latch 32 is moved to a position slightly below the closing holding latch receiving shaft 64. Further, the closing cam 31 is rotated so that the closing holding roller 59 moves the closing cam 3 as shown in FIG.
When the first closing arm 57 tries to rotate in the clockwise direction due to the stored force of the opening assisting spring 61 and the breaking spring 24, when the first closing arm 57 deviates from the maximum radius peripheral edge 31b of 1, the closing holding roller 59 and the closing holding latch 32. The semicircular portion of the closing and holding latch receiving shaft 64 is engaged, and the operation of the first closing arm 57 is stopped to enter the closing state. Even when the contact on one side is closed, the closing force of the closing spring 26 can be stored by the throwing force storing mechanism D, so that it is possible to stand by so as to switch to the other side at any time.

Next, the contact opening operation will be described. As shown in FIG. 9, in the contact opening operation, first, the tripping electromagnet 67 is activated by an electrical opening command to move the tripping rod 68 to the right, and the tip of the tripping rod 68 opens the opening piece. 65 is rotated by pressing, and the closing holding latch receiving shaft 64 is rotated clockwise. This pressing rotation of the opening piece 65 can also be performed by operating the manual trip button 69 instead of the tripping electromagnet 67. As a result, the closing and holding latch receiving shaft 64 is disengaged from the closing and holding latch 32, and the closing and holding latch 32 becomes rotatable. Therefore, the first closing arm 57 is rotated clockwise together with the closing shaft 58 by the urging force of the opening assisting spring 61 and the breaking spring 24 of the contact mechanism A. At this time, the closing holding latch 32 is also rotated clockwise through the closing holding roller 59.

As shown in FIG. 12, the input shaft 58.
When is rotated clockwise, the second closing arm 116 is also rotated clockwise, and the operation link shaft 73 is engaged with the engaging portion 75a of the operation arm 75 via the operation link 72, so that the operation arm Rotate 75 clockwise and move it upward. Since the crossbar 16 is also rotated clockwise by the clockwise rotation of the operation arm 75, as shown in FIG. 6, the first toggle link 14 is rotated clockwise via the arm 15 and the pin 23. When the movable contactor support member 1 is rotated through the shaft 19, the second toggle link 13, and the shaft 17, the movable contactor support member 1 is rotated.
2 is rotated counterclockwise. For this reason, the movable contactor 7 coupled to the movable contactor support member 12 is rotated counterclockwise, and the movable contact 6 provided on the movable contactor 7 is opened from the fixed contactor 5. It becomes a state.

[0039]

As described above, according to the present invention, even if a closing operation is further performed on the contact mechanism on the already closed side, the energizing force of the closing spring is not released, so that the opening / closing operation is performed. It is possible to prevent the "dry hitting" operation that applies excessive mechanical shock to the switch, and further improve the durability of the switch.

[Brief description of drawings]

FIG. 1 is an external front view showing an embodiment of a conversion switch according to the present invention.

FIG. 2 is a side view of a conversion switch according to the present invention.

FIG. 3 is a main circuit circuit diagram of a conversion switch according to the present invention.

FIG. 4 is a side view of the main part of the conversion switch according to the present invention.

FIG. 5 is a front sectional view of an essential part of the cover of the conversion switch according to the present invention with the right part cut away.

FIG. 6 is a side sectional view of a main part of the contact mechanism shown in FIG. 5, in which the normal contact is closed.

FIG. 7 is a side sectional view of the main part of the throwing-in and storing mechanism shown in FIG.

8 is a partial view of the throw-and-power-accumulation mechanism of FIG. 7. FIG.

FIG. 9 is a side cross-sectional view of a main portion when one of the contacts of the closing spring holding / releasing mechanism having the opening command mechanism is in a closing completed state.

FIG. 10 is a partial side cross-sectional view of the closing spring holding / releasing mechanism in the middle of closing.

FIG. 11 is a partial cross-sectional side view of a main part in a state where the contacts of the closing spring holding / releasing mechanism are open and the closing spring is energized.

FIG. 12 is a side cross-sectional view of a main part of the selection mechanism section in which the regular side is in a closed state.

FIG. 13 is a side sectional view of a main part of the selection mechanism section with both sides open.

14 is a sectional view taken along line 14-14 of FIG.

FIG. 15 is a side cross-sectional view of a main portion of the selection mechanism section in a state of swinging to the regular side.

16 is a cross-sectional view taken along line 16-16 of FIG.

FIG. 17 is a side sectional view of a main part immediately after the release driving mechanism operates and immediately before the closing spring holding / release mechanism operates.

FIG. 18 is a plan view of a slide plate and a movable rod stopper.

FIG. 19 is a side view of the slide plate and the movable rod stopper.

FIG. 20 is a plan view of a slide plate and a movable rod stopper.

FIG. 21 is a side view illustrating a slide plate and a movable rod stopper.

FIG. 22 is an explanatory view of a main part of a swing mechanism.

FIG. 23 is an explanatory view of a main part of a swing mechanism.

FIG. 24 is an explanatory view of a main part of a swing mechanism.

[Explanation of symbols]

 A contactor mechanism B spring closing mechanism C selection mechanism D throwing input energy storage mechanism E closing spring holding / releasing mechanism F opening command mechanism G closing command mechanism H swinging mechanism I throwing input transmission mechanism J releasing drive mechanism 2 conductive part base 3 Mechanism base 16,16 'Crossbar 25,25' Mechanism frame 26 Closing spring 31 Closing cam 32 Closing holding latch 48 Accumulation force holding roller 50 Charge latch 51 Charge latch receiving shaft 52 1st closing link 54 Closing link shaft 55th 2 Closing link 57 1st closing arm 58 Closing shaft 59 Closing holding roller 64 Closing holding latch Receiving shaft 67 Draw-out electromagnet 69 Manual release button 72 Operation link 73 Operation link axis 74 Operation link axis spring 75,75 'Operation arm 78,78 'Selection mechanism frame 79 Operation link shaft guide 80,80' Electromagnet 81,81 'Excitation coil 82,82' Fixed iron core 83,83 'Movable iron core 84,84' Movable rod 85 Selection mechanism Base 87,87 'Stopper 88,88' Roller 89,89 'Manual input button 90,90' Veneer 94 Slide plate 95 Selection shaft 96,96 'First selection lever 97,97' Second selection lever 98a, 98b Spring 99 Spacer 100 Selection mechanism side plate 101,101 'Deflection plate 102 Closing slide 103 Slide head 104 Sliding head link 105 Closing release arm 106 Arm 107 Roller 109 Guide plate 110 Lever 111 Spring 112,112' Closing slide protrusion 113 Roller 115 Pin 116 Second closing arm

Claims (1)

[Claims] 1. A conversion switch in which one of the contact mechanism (A) on the normal side and the spare side is selected and is closed by a single spring closing mechanism (B). Has a pair of closing electromagnets (80, 80 '), an engaging portion (73) at one end, and the spring closing mechanism (B) at the other end.
An operating link (72) that is rotatably supported at one end of a closing arm (116) extending from the spring, and that is biased by a spring (74) to the intermediate position between the contact mechanism in the open position. , Directly connected to the contact mechanism of each of the regular side and the spare side,
Opposed to both sides of the operation link toward the operation link, a pair of symmetrically arranged operation arms (75, 75 ') having engaging portions (75a, 75'a) at their tips respectively. )
And a swing mechanism (H) for selectively engaging the engaging portion of the operation link with the engaging portion of the operating arm on the regular side or the spare side by the swing action, and operated by the closing electromagnet. Release drive mechanism (J)
And a closing spring holding / releasing mechanism (E) which is provided in the spring closing mechanism, temporarily holds the closing spring (26) in a stored state, and releases the restraint of the closing spring in the stored state at the time of closing. )
And each of the movable rods (84, 84 ') that are activated when the electromagnet for closing, whichever is selected from the normal side or the spare side, is excited at the time of closing. Is swung to engage the engagement portion of the operation link and the engagement portion of the operation arm on the selected side, and mechanically connect the contact mechanism and the spring loading mechanism on the selected side. Then, the closing spring holding / releasing mechanism is operated to release the closing spring of the spring closing mechanism that is in the pre-accumulated state, and the closing shaft (58) of the spring closing mechanism is rotated. An operation in which the closing arm, the operation link, and the operation arm are made to respond to close the contact mechanism on the selected side and the closing electromagnet on the other side cannot be closed by the swing mechanism. Mechanism The release driving mechanism (J) of the closing spring holding / releasing mechanism is linked to the movable rod of the closing electromagnet when any of the closing electromagnets operates, and is constantly moved in a fixed direction on the regular side and A closing slide (102) common to the spare side and a closing spring releasing arm whose one end is rotatably connected to the leading end of the closing slide and whose other end extends from the releasing drive mechanism.
A slide head (103) facing the (105), and a link member (104, 106, 115) connecting the slide head and the closing shaft of the spring closing mechanism, and The link member which responds rotates the slide head to move the facing position of the slide head and the closing spring releasing arm, and attempts to further close the contact mechanism on the closed side. The operation mechanism of the conversion switch, wherein the operation of the closing slide does not act on the closing spring releasing arm.