Mechanical interlocking device of opening and closing device

Abstract

Provided is a mechanical interlocking device for an opening and closing device, which reliably prevents simultaneous closing of both a circuit breaker and a ground switch without affecting the switching function of the circuit breaker and the ground switch even if the mechanical interlocking device is provided between the circuit breaker and the ground switch, and which is characterized in that: the mechanical interlocking device for an opening and closing device is provided with an interlocking mechanism; a ratchet wheel is connected to a shaft of a motor that drives a ground switch operator that operates opening and closing of a ground switch. A spring supported by a shaft lever connected to a drive lever that is driven in accordance with an opening / closing operation of the circuit breaker; a lever rotatably supported by the spring; and a pawl forming member, one end of which is rotatably supported by the rod, the pawl forming member having a pawl formed thereon that engages with the ratchet wheel, and the ratchet wheel and the pawl being engaged and disengaged by expansion and contraction of the spring accompanying opening and closing operation of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to a mechanical interlocking device for a switchgear, and in particular to a mechanical interlocking device for a switchgear suitable for the following scenario: the device is configured to be arranged between a circuit breaker and a grounding switchgear for a gas-insulated switchgear, wherein the grounding switchgear cannot be operated when the circuit breaker is in a closed position, and the circuit breaker cannot be operated when the grounding switchgear is in a closed position. Background Art

[0002] A gas-insulated switchgear uses a circuit breaker that is filled with gas and surrounded by at least one metal. The circuit breaker is used to disconnect electrical equipment from a high-voltage line to ensure safe operation and maintenance of the electrical equipment in a no-load state.

[0003] Furthermore, from the viewpoint of safety, in order to provide safer operation and maintenance, at least one grounding switch can be used together with the circuit breaker, and as a result, capacitive current or inductive current is isolated.

[0004] Furthermore, in order to avoid phases that cause ground faults, the circuit breaker and the grounding switch are not allowed to be closed simultaneously.

[0005] Usually, an electric interlock device is provided between the circuit breaker and the grounding switch, and the electric interlock device cuts off the current supply to the motors driving the circuit breaker operator and the grounding switch operator to interlock the circuit breaker operator and the grounding switch operator.

[0006] However, since the electrical interlock device loses its function when an electrical component fails, a mechanical interlock device is provided between the circuit breaker and the grounding switch in order to improve reliability.

[0007] For example, Patent Document 1 discloses the following interlocking device for a switch: in order to reliably perform mechanical interlocking between operators separated by an arbitrary distance, in the operator that rotates the operating shaft of the switch to operate, mechanical interlocking is performed so that when one switch is closed or opened, the other switch cannot be closed or opened. In the interlocking device for the switch, the operators of the two switches are connected by a flexible tube containing a flexible wire, so that as the switch of one is operated, a lock pin is driven to prevent the gate of the other switch from being opened, thereby mechanically interlocking the two operators.

[0008] In addition, the following interlocking device of a switch provided with a locking structure is recorded in Patent Document 2: in order to obtain an interlocking device between multiple switches required by using power supply and distribution circuits of multiple systems, among a first switch, a second switch and a third switch, the opening and closing actions of the switches are transmitted to each other with the other switches via an interlocking line, and through the closing action of the second switch, the driving member of the first switch moves to the first position, and through the closing action of both the second switch and the third switch, the driving member of the first switch moves to the second position, and when the driving member of the first switch moves to the second position, the closing action of the first switch is constrained.

[0009] Patent Document 1: Japanese Patent Application Laid-Open No. 60-167220

[0010] Patent Document 2: Japanese Patent Application Laid-Open No. 7-193923 Summary of the invention

[0011] Problems to be solved by the invention

[0012] In addition, the mechanical interlocking device is designed so that the operating part blocks the shaft or rod in the main operating part of the opening and closing device, so the blocking force becomes very large, and is designed so that the blocking part blocks the part moving together with the movable contact of the opening and closing device.

[0013] Therefore, if there is always a gap between the blocking parts, then in the blocking state, if the opening and closing device is to be closed by a motor or manual operation, the movement of the movable contact of the opening and closing device will become smaller and the sensing distance may be reduced, which may affect the sensing performance of the opening and closing device.

[0014] In addition, due to the layout of the gas-insulated switchgear substation, when the circuit breaker and the grounding switch are far away from each other and are set at different positions, it becomes very difficult to connect the mechanical interlocking device set between the circuit breaker and the grounding switch. For example, even if the connection can be made, the connection structure becomes complicated, which may increase the cost and reduce the reliability.

[0015] However, neither of the above-mentioned Patent Documents 1 and 2 describes a solution to such a problem.

[0016] The present invention is made in view of the above-mentioned problems, and its object is to provide a mechanical interlocking device for a switching device, which can reliably prevent the circuit breaker and the grounding switch from being closed at the same time without affecting the switching functions of the circuit breaker and the grounding switch even if a mechanical interlocking device is provided between the circuit breaker and the grounding switch.

[0017] Means used to solve problems

[0018] In order to achieve the above-mentioned purpose, the mechanical interlocking device of the switching device of the present invention is a mechanical interlocking device of the switching device which is arranged between the circuit breaker and the earthing switch and mechanically interlocks the opening and closing operations of the above-mentioned circuit breaker and the above-mentioned earthing switch, and is characterized in that the engagement and disengagement of the ratchet and the pawl constituting the above-mentioned mechanical interlocking device are performed by a spring which expands and contracts with the opening and closing operations of the above-mentioned circuit breaker.

[0019] Specifically, the mechanical interlocking device of the switching device is arranged between the circuit breaker and the grounding switch, and mechanically interlocks the switching operation of the circuit breaker and the grounding switch, and is characterized in that the mechanical interlocking device comprises: a ratchet connected to the shaft of a motor that drives the grounding switch operator for operating the opening and closing of the grounding switch; a spring supported by a shaft connected to a driving rod driven along with the opening and closing operation of the circuit breaker; a rod supported by the spring so as to be rotatable; and a claw forming component, one end of which is supported by the rod so as to be rotatable and is formed with a claw engaged with the ratchet, and the ratchet and the claw are engaged and disengaged by the expansion and contraction of the spring accompanying the opening and closing operation of the circuit breaker.

[0020] Effects of the Invention

[0021] According to the present invention, even if a mechanical interlock device is provided between the circuit breaker and the earthing switch, it is possible to reliably prevent the circuit breaker and the earthing switch from being closed simultaneously without affecting the switching functions of the circuit breaker and the earthing switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view showing the first embodiment of the mechanical interlocking device of the opening and closing device of the present invention.

[0023] Figure 2 It is a perspective view showing a first embodiment of the mechanical interlocking device of the opening and closing device of the present invention.

[0024] Figure 3 This is a front view showing approximately half of the circuit breaker in the open state in the first embodiment of the mechanical interlock device of the switchgear of the present invention.

[0025] Figure 4 This is a front view showing approximately half of a circuit breaker in a closed state in the first embodiment of the mechanical interlock device of the switchgear of the present invention.

[0026] Figure 5 This is a front view showing approximately half of Example 2 (an example in which a tension spring is used as the spring) of the mechanical interlocking device of the opening and closing device of the present invention.

[0027] Figure 6This is a front view showing approximately half of Example 3 (an example in which a tension spring is used as the spring) of the mechanical interlocking device of the opening and closing device of the present invention.

[0028] Figure 7 It is a front view showing approximately half of the fourth embodiment of the mechanical interlocking device of the opening and closing device of the present invention.

[0029] Description of symbols

[0030] 1, 1A…ratchet; 2…motor; 2a…motor shaft; 3…claw forming member; 3a, 16a…claw; 4, 16…driving rod; 4a…up-down direction plane portion of driving rod; 4a1…first U-shaped groove; 4b…horizontal direction plane portion of driving rod; 4b1…second U-shaped groove; 5…spring; 6…nut; 7…shaft rod; 7a…cover; 8…second pin shaft; 9…first pin shaft; 10, 10a…fixed shaft; 11…plate; 11a…through hole; 11b…second fixed shaft; 12…circuit breaker; 13…driving rod; 14…tension spring; 15…interlocking device base; 17…torsion spring; 18…other fixed shafts; 100A, 100B, 100C, 100D…mechanical interlocking device. DETAILED DESCRIPTION

[0031] Hereinafter, the mechanical interlocking device of the opening and closing device of the present invention will be described based on the illustrated embodiment. In addition, in each figure, the same reference numerals are used for the same components.

[0032] [Example 1]

[0033] exist Figure 1 and Figure 2 Detailed Description of the Invention Embodiment 1 of the mechanical interlocking device of the opening and closing device of the present invention is shown in FIG. Figure 1 It is a front view showing the first embodiment of the mechanical interlocking device of the opening and closing device of the present invention. Figure 2 It is a stereogram.

[0034] Figure 1 and Figure 2 In the mechanical interlocking device 100A of the switchgear of the present embodiment shown in FIG. 1 , the circuit breaker 12 (see Figure 3 and Figure 4 ) is driven by the driving rod 13 (see Figure 3 and Figure 4 ) is connected to the shaft 7 constituting the mechanical interlocking device 100A, and the grounding switch (not shown) is connected to the motor shaft 2a of the motor 2 driven by the grounding switch operator for operating the opening and closing of the grounding switch.

[0035] The mechanical interlock device 100A is provided between the circuit breaker 12 and the grounding switch, and mechanically interlocks the switching operations of the circuit breaker 12 and the grounding switch.

[0036] This embodiment is characterized in that the ratchet 1 constituting the mechanical interlocking device 100A and the claw 3 a formed on the claw forming member 3 are engaged and disengaged by the spring 5 that expands and contracts in accordance with the opening and closing operation of the circuit breaker 12 .

[0037] The following is a specific description.

[0038] Figure 1 and Figure 2 The mechanical interlocking device 100A of the present embodiment shown in the figure is roughly configured to include: a ratchet 1 connected to a motor shaft 2a of a motor 2 that drives an earthing switch operator for operating the earthing switch; a spring 5 connected to a drive rod 13 (see FIG. 1 ) that is driven by the operation of opening and closing a circuit breaker 12; Figure 3 and Figure 4 ) is supported by an axial rod 7 connected thereto; a driving rod 4 is rotatably supported by the spring 5 via a fixed shaft 10; and a claw forming component 3, one end of which is rotatably supported by the driving rod 4 and is formed with a claw 3a engaged with the ratchet 1. The mechanical interlocking device 100A engages and releases the ratchet 1 and the claw 3a by the extension and contraction of the spring 5 accompanying the opening and closing operation of the circuit breaker 12.

[0039] In addition, the above-mentioned ratchet 1 is formed in a disc shape, and is connected to the motor shaft 2a of the motor 2 via a hole formed in the center portion of the disc, and a plurality of concave-convex portions inclined in a counterclockwise direction are formed on the outer periphery of the ratchet 1 formed in a disc shape, and the ratchet 1 and the pawl 3a are engaged by inserting the pawl 3a into the concave portion of the concave-convex portion, and the engagement between the ratchet 1 and the pawl 3a is released by disengaging the pawl 3a from the concave portion of the concave-convex portion.

[0040] Furthermore, the above-mentioned claw forming member 3 is rotatably supported at one end by the driving rod 4 via the first pin 9 , and is rotatably supported at the other end by the second pin 8 fixed to the interlocking device base 15 .

[0041] In addition, the above-mentioned drive rod 4 has a horizontal plane portion 4b and a vertical plane portion 4a and is formed into a roughly L-shape. The bent portion of the roughly L-shaped drive rod 4 is supported by a fixed shaft 10 fixed to the interlocking device base 15 so as to be rotatable, and a first U-shaped groove 4a1 is formed on the vertical plane portion 4a of the drive rod 4, and a second U-shaped groove 4b1 is formed on the horizontal plane portion 4b of the drive rod 4.

[0042] The first pin 9 is engaged with the first U-shaped groove 4a1 to rotatably support the claw forming member 3, and the shaft 7 connected to the driving rod 13 is movably supported (inserted) in the second U-shaped groove 4b1.

[0043] Furthermore, below the horizontal plane portion 4b of the driving rod 4, there is provided a plate 11 with an L-shaped cross section which is separated from the horizontal plane portion 4b of the driving rod 4 by a prescribed distance and fixed to the interlocking device base 15, and at the end of the plate 11 with the L-shaped cross section, there is formed a through hole 11a for the shaft rod 7 to pass through, and at the outer periphery of the shaft rod 7 passing through the through hole 11a, a spring 5 is coaxially installed, and the spring 5 is held between the horizontal plane portion 4b of the driving rod 4 and the end of the plate 11 with the L-shaped cross section.

[0044] Furthermore, two nuts 6 for restricting the vertical movement of the drive rod 4 are provided at the end of the shaft 7 on the opposite side to the side where the spring 5 is attached, sandwiching the horizontal plane portion 4 b of the drive rod 4 .

[0045] In addition, any one of a pressure spring, a tension spring, a leaf spring, and a torsion spring is preferable as the spring 5. In addition, the reference numeral 7a in the figure is a cover covering the shaft rod 7 and the driving rod 13.

[0046] Next, use Figure 3 and Figure 4 The engagement and disengagement of the ratchet wheel 1 and the pawl 3 a in the mechanical interlocking device 100A of the opening and closing device of the present embodiment having the above-described structure will be described.

[0047] Figure 3 Indicates the state where the circuit breaker 12 is "open" and the engagement between the ratchet 1 and the claw 3a is released. Figure 4 The circuit breaker 12 is shown in a "closed" state, and the ratchet 1 is engaged with the claw 3a.

[0048] like Figure 3 As shown, when the circuit breaker 12 is in the "open" state, the driving rod 13 moves upward, and the shaft 7 is then lowered. When the shaft 7 is lowered, the driving rod 4 is pulled downward by the shaft 7 and the nut 6, the spring 5 is compressed, and the driving rod 4 rotates clockwise around the fixed shaft 10, and the claw forming member 3 engaged by the first pin 9 rotates counterclockwise around the second pin 8. In this way, the claw 3a formed on the claw forming member 3 is separated from the concave portion of the concave-convex portion formed on the outer peripheral portion of the disc-shaped ratchet 1, so that the engagement between the ratchet 1 and the claw 3a is released.

[0049] In this state, since the ratchet 1 is not engaged with the pawl 3 a , the motor 2 can be rotated, and since the drive rod 4 is held by the nut 6 , the pawl 3 a cannot be engaged with the ratchet 1 .

[0050] On the other hand, Figure 4 As shown, when the circuit breaker 12 is in the "closed" action, the drive rod 13 moves downward, and the shaft 7 rises upward. If the shaft 7 rises upward, the nut 6 moves away from the drive rod 4 and the spring 5, and the compression of the spring 5 is released, so that the drive rod 4 rotates counterclockwise around the fixed axis 10. Then, if the claw forming part 3 engaged by the first pin 9 rotates clockwise around the second pin 8, the claw 3a formed on the claw forming part 3 is inserted into the concave part of the concave-convex part formed on the outer peripheral part of the disc-shaped ratchet 1, so that the claw 3a is engaged with the ratchet 1.

[0051] According to this embodiment, even if the mechanical interlock device 100A is provided between the circuit breaker 12 and the grounding switch, the ratchet 1 and the pawl 3a are engaged and disengaged by the spring 5 that expands and contracts as the circuit breaker 12 is opened and closed, so that the circuit breaker 12 and the grounding switch can be reliably prevented from being closed simultaneously without affecting the switching functions of the circuit breaker 12 and the grounding switch.

[0052] In addition, in the above-mentioned embodiment, the plurality of concavo-convex parts formed on the outer periphery of the disc-shaped ratchet 1 are inclined in the counterclockwise direction, but the plurality of concavo-convex parts formed on the outer periphery of the disc-shaped ratchet 1 may be inclined in the clockwise direction. In this case, of course, the claw 3a formed on the claw forming member 3 is inclined so as to be inserted into the concave part of the concavo-convex part formed on the outer periphery of the ratchet 1.

[0053] Even with such a structure, the same effects as those described above can be obtained.

[0054] [Example 2]

[0055] exist Figure 5 Detailed Description of the Invention Embodiment 2 of the mechanical interlocking device of the opening and closing device of the present invention is shown. Figure 5 It is a front view showing approximately half of the second embodiment of the mechanical interlocking device of the opening and closing device of the present invention.

[0056] like Figure 5As shown, the mechanical interlock device 100B of this embodiment is roughly configured to include: a ratchet 1 connected to a motor shaft 2a of a motor 2 for driving an earthing switch operator for operating the earthing switch; a shaft 7 connected to a drive rod 13 driven by the operation of opening and closing the circuit breaker 12; a drive rod 4 having a horizontal plane portion 4b and a vertical plane portion 4a and formed in a substantially L-shape, the substantially L-shaped curved portion being rotatably supported by a fixed shaft 10 of an interlock device base 15, and a first U-shaped groove 4a1 being formed in the vertical plane portion 4a, and a second U-shaped groove 4b1 being formed in the horizontal plane portion 4b; a claw forming member 3 having one end rotatably supported by the drive rod 4 via a first pin shaft and the other end rotatably supported via a second pin shaft 8, and having a claw 3a engaged with the ratchet 1; and a tension spring 14 having one end supported by a second fixed shaft 11b of the interlock device base 15 and the other end supported by the drive rod 4.

[0057] Furthermore, in the present embodiment, the ratchet wheel 1 and the pawl 3 a are engaged and disengaged by the tension spring 14 that expands and contracts in accordance with the opening and closing operation of the circuit breaker 12 .

[0058] Even with such a structure of this embodiment, the effect is the same as that of the first embodiment.

[0059] [Example 3]

[0060] exist Figure 6 Detailed Description of the Invention Embodiment 3 of the mechanical interlocking device of the opening and closing device of the present invention is shown. Figure 6 It is a front view showing approximately half of the third embodiment of the mechanical interlocking device of the opening and closing device of the present invention.

[0061] like Figure 6As shown, the mechanical interlocking device 100C of this embodiment is roughly constructed as follows: a ratchet 1 connected to a motor shaft 2a of a motor 2 for driving an earthing switch operator for operating the earthing switch; a shaft 7 connected to a driving rod 13 driven by the operation of opening and closing the circuit breaker 12; a driving rod 4 having a horizontal plane portion 4b and a vertical plane portion 4a and formed into a substantially L-shape, the substantially L-shaped curved portion being supported by a fixed shaft 10 of an interlocking device base 15 so as to be rotatable, and a first U-shaped groove 4a1 being formed in the vertical plane portion 4a, and a second U-shaped groove 4b1 being formed in the horizontal plane portion 4b; a claw A forming component 3 is formed, one end of which is supported by the drive rod 4 via the first pin shaft 9 so as to be rotatable, and the other end is supported by the second pin shaft 8 so as to be rotatable, and a claw 3a is formed to engage with the ratchet 1; a plate 11 with an L-shaped cross-section is arranged below the horizontal plane portion 4b of the drive rod 4, and is fixed to the interlocking device base 15 at a prescribed distance from the horizontal plane portion 4b of the drive rod 4; and a roughly V-shaped torsion spring 17, one end of which is supported below the horizontal plane portion 4b, the other end of which is supported by the plate 11, and the center portion of which is supported by other fixed axes (axes different from the first pin shaft 9, the second pin shaft 8, and the fixed axis 10) 18 of the interlocking device base 15.

[0062] Furthermore, in the present embodiment, the ratchet wheel 1 and the pawl 3 a are engaged and disengaged by the torsion spring 17 that expands and contracts in accordance with the opening and closing operation of the circuit breaker 12 .

[0063] Even with such a structure of this embodiment, the effect is the same as that of the first embodiment.

[0064] [Example 4]

[0065] exist Figure 7 Detailed Description of the Invention Embodiment 4 of the mechanical interlocking device of the opening and closing device of the present invention is shown. Figure 7 It is a front view showing approximately half of the fourth embodiment of the mechanical interlocking device of the opening and closing device of the present invention.

[0066] like Figure 7 As shown, the mechanical interlocking device 100D of this embodiment is roughly constructed as follows: a ratchet 1A, which is connected to the motor shaft 2a of the motor 2 that drives the grounding switch operator for operating the opening and closing of the grounding switch; a spring 5, which is supported by the shaft 7 connected to the driving rod 13 driven by the opening and closing operation of the circuit breaker 12; and a roughly L-shaped driving rod 16, which is supported by the spring 5 so as to be rotatable around the fixed axis 10a and is formed with a claw 16a that engages with the ratchet 1A.

[0067] Furthermore, in this embodiment, the ratchet wheel 1A and the pawl 16 a are engaged and disengaged by the expansion and contraction of the spring 5 accompanying the opening and closing operation of the circuit breaker 12 .

[0068] Specifically, the mechanical interlocking device 100D of this embodiment has a ratchet 1A formed in a disc shape, which is connected to the motor shaft 2a of the motor 2 via a hole formed in the center portion of the disc, and a plurality of concave-convex portions inclined in a clockwise direction are formed on the outer periphery of the ratchet 1A formed in a disc shape, and the pawl 16a is inserted into the concave portion of the concave-convex portion, so that the ratchet 1A engages with the pawl 16a, and the engagement between the ratchet 1A and the pawl 16a is released by the pawl 16a being disengaged from the concave portion of the concave-convex portion.

[0069] In addition, as the above-mentioned spring 5, any one of a pressure spring, a tension spring, a leaf spring, and a torsion spring is preferable.

[0070] According to this embodiment, even if the mechanical interlock device 100D is provided between the circuit breaker 12 and the grounding switch, the spring 5 which expands and contracts with the opening and closing operation of the circuit breaker 12 performs the engagement and disengagement of the ratchet 1A and the pawl 16a, so that the circuit breaker 12 and the grounding switch can be reliably prevented from being closed at the same time without affecting the switching functions of the circuit breaker 12 and the grounding switch.

[0071] Furthermore, since the claw 16 a is formed integrally with the driving rod 16 , the claw forming member 3 as in the first embodiment is no longer required, which also leads to a reduction in the number of components.

[0072] In addition, the present invention is not limited to the above-mentioned embodiments, but includes various modified examples. For example, the above-mentioned embodiments are described in detail in order to easily explain the present invention, and are not limited to all the structures described. In addition, a part of the structure of a certain embodiment can be added to the structure of other embodiments or the structure of other embodiments can be added. In addition, with respect to a part of the structure of each embodiment, other structures can be added / deleted / replaced.

Claims

1. A mechanical interlocking device for a switchgear, arranged between a circuit breaker and a grounding switchgear, for mechanically interlocking the switching operations of the circuit breaker and the grounding switchgear, The mechanical interlocking device of the above-mentioned opening and closing device is characterized in that: The ratchet and the pawl constituting the mechanical interlocking device are engaged and disengaged by a spring that expands and contracts in accordance with the opening and closing operation of the circuit breaker.

2. A mechanical interlocking device for a switchgear, arranged between a circuit breaker and a grounding switchgear, for mechanically interlocking the switching operations of the circuit breaker and the grounding switchgear, The mechanical interlocking device of the above-mentioned opening and closing device is characterized in that: The mechanical interlocking device comprises: a ratchet wheel connected to the shaft of a motor driving an earthing switch operator for operating the earthing switch; a spring supported by a shaft connected to a driving rod driven by the operation of opening and closing the circuit breaker; a rod supported by the spring so as to be rotatable; and a claw forming member, one end of which is supported by the rod so as to be rotatable, the claw forming member being formed with a claw engaged with the ratchet wheel. The ratchet wheel and the pawl are engaged and disengaged by expansion and contraction of the spring accompanying the opening and closing operation of the circuit breaker.

3. The mechanical interlocking device of the opening and closing device according to claim 2, characterized in that: The ratchet is formed in a disc shape and is connected to the shaft of the motor via a hole formed in the center portion of the disc. A plurality of concave-convex portions inclined in a counterclockwise direction are formed on the outer periphery of the ratchet formed in a disc shape. The ratchet is engaged with the pawl by inserting the pawl into the concave portion of the concave-convex portion. The engagement between the ratchet and the pawl is released by disengaging the pawl from the concave portion of the concave-convex portion.

4. The mechanical interlocking device of the opening and closing device according to claim 3, characterized in that: One end of the claw forming member is rotatably supported by the lever via a first pin, and the other end of the claw forming member is rotatably supported by a second pin fixed to an interlocking device base.

5. The mechanical interlocking device of the opening and closing device according to claim 4, characterized in that: The rod has a horizontal plane portion and an up-down plane portion to form a roughly L-shape, and the bent portion of the roughly L-shaped rod is fixed to the fixed shaft support of the interlocking device base so as to be rotatable, and a first U-shaped groove is formed in the up-down plane portion of the rod, and a second U-shaped groove is formed in the horizontal plane portion of the rod, the first pin shaft is engaged in the first U-shaped groove and the claw forming component is supported so as to be rotatable, and in the second U-shaped groove, the shaft rod connected to the circuit breaker operator is supported so as to be able to move.

6. The mechanical interlocking device of the opening and closing device according to claim 5, characterized in that: A plate with an L-shaped cross section is provided below the horizontal plane portion of the above-mentioned rod, and the plate with an L-shaped cross section is fixed to the above-mentioned interlocking device base at a specified distance from the horizontal plane portion of the above-mentioned rod, and a through hole for the above-mentioned shaft rod to pass through is formed at the end of the plate with an L-shaped cross section, and the above-mentioned spring is coaxially installed on the outer periphery of the above-mentioned shaft rod passing through the above-mentioned through hole, and the above-mentioned spring is retained between the horizontal plane portion of the above-mentioned rod and the end of the above-mentioned plate with an L-shaped cross section.

7. The mechanical interlocking device of the opening and closing device according to claim 6, characterized in that: A nut for restricting movement of the rod is provided at an end portion of the shaft rod on the opposite side to the side on which the spring is mounted, sandwiching the horizontal plane portion of the rod.

8. The mechanical interlocking device of the opening and closing device according to claim 2, characterized in that: The ratchet is formed in a disc shape and is connected to the shaft of the motor via a hole formed in the center portion of the disc. A plurality of concave-convex portions inclined in a clockwise direction are formed on the outer periphery of the ratchet formed in a disc shape. The ratchet is engaged with the pawl by inserting the pawl into the concave portion of the concave-convex portion. The engagement between the ratchet and the pawl is released by disengaging the pawl from the concave portion of the concave-convex portion.

9. A mechanical interlocking device for a switchgear, arranged between a circuit breaker and a grounding switchgear, for mechanically interlocking the switching operations of the circuit breaker and the grounding switchgear, The mechanical interlocking device of the above-mentioned opening and closing device is characterized in that: The mechanical interlocking device comprises: a ratchet wheel connected to the shaft of a motor driving an earthing switch operator for operating the earthing switch; a spring supported by a shaft connected to a driving rod driven by the operation of opening and closing the circuit breaker; and a rod supported by the spring so as to be rotatable around a fixed axis and having a claw engaged with the ratchet wheel. The ratchet wheel and the pawl are engaged and disengaged by expansion and contraction of the spring accompanying the opening and closing operation of the circuit breaker.

10. The mechanical interlocking device of the opening and closing device according to claim 9, characterized in that: The ratchet is formed in a disc shape and is connected to the shaft of the motor via a hole formed in the center portion of the disc. A plurality of concave-convex portions inclined in a clockwise direction are formed on the outer periphery of the ratchet formed in a disc shape. The ratchet is engaged with the pawl by inserting the pawl into the concave portion of the concave-convex portion. The engagement between the ratchet and the pawl is released by disengaging the pawl from the concave portion of the concave-convex portion.

11. The mechanical interlocking device of the opening and closing device according to any one of claims 1 to 10, characterized in that: The spring may be any one of a compression spring, a tension spring, a leaf spring, and a torsion spring.

12. A mechanical interlocking device for a switchgear, arranged between a circuit breaker and a grounding switchgear, for mechanically interlocking the switching operations of the circuit breaker and the grounding switchgear, The mechanical interlocking device of the above-mentioned opening and closing device is characterized in that: The mechanical interlocking device comprises: a ratchet connected to the shaft of a motor that drives an operating device for an earthing switch that operates the opening and closing of the earthing switch; a shaft connected to a driving rod that is driven in accordance with the opening and closing operation of the circuit breaker; a rod having a horizontal plane portion and an up-down plane portion to form a substantially L-shaped shape, the substantially L-shaped curved portion being rotatably supported by a fixed shaft of an interlocking device base, and a first U-shaped groove being formed in the up-down plane portion and a second U-shaped groove being formed in the horizontal plane portion; a claw forming component, one end of which is rotatably supported by the rod via a first pin shaft and the other end of which is rotatably supported by a second pin shaft, the claw forming component being formed with a claw that engages with the ratchet; and a tension spring, one end of which is supported by the second fixed shaft of the interlocking device base and the other end of which is supported by the rod, The ratchet wheel and the pawl are engaged and disengaged by the tension spring that expands and contracts in accordance with the opening and closing operation of the circuit breaker.

13. A mechanical interlocking device for a switchgear, arranged between a circuit breaker and a grounding switchgear, for mechanically interlocking the switching operations of the circuit breaker and the grounding switchgear, The mechanical interlocking device of the above-mentioned opening and closing device is characterized in that: The mechanical interlocking device comprises: a ratchet wheel connected to the shaft of a motor driving an earthing switch operator for operating the earthing switch; a shaft connected to a driving rod driven by the operation of opening and closing the circuit breaker; a rod having a horizontal plane portion and an up-down plane portion and formed into a substantially L-shape, the substantially L-shaped curved portion being supported by a fixed shaft of the interlocking device base so as to be rotatable, and a first U-shaped groove being formed in the up-down plane portion and a second U-shaped groove being formed in the horizontal plane portion; a claw forming portion A member, one end of which is supported by the rod via a first pin so as to be rotatable, and the other end of which is supported by a second pin so as to be rotatable, the claw forming member being formed with a claw engaged with the ratchet; a plate having an L-shaped cross section being arranged below the horizontal plane portion of the rod and being fixed to the interlocking device base at a predetermined distance from the horizontal plane portion of the rod; and a torsion spring, one end of which is supported by the bottom of the horizontal plane portion and the other end of which is supported by the plate, and the center portion of the torsion spring is supported by another fixed shaft of the interlocking device base, The ratchet wheel and the pawl are engaged and disengaged by the torsion spring that expands and contracts in accordance with the opening and closing operation of the circuit breaker.

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