JP7104845B1 - Operation rod - Google Patents

Abstract

A novel operating rod capable of reliably attaching and detaching a fuse cylinder is provided. The operating rod is for attaching and detaching a fuse cylinder used in a high-voltage cutout. The operation rod includes an operation rod main body, a cylindrical housing member that is fixed to the tip of the operation rod main body, and that can house the end of the fuse tube, and a housing member that surrounds the outer periphery of the housing member. a support member loosely fitted to the outer circumference of the housing member, and a housing member disposed between the housing member and the support member. A plurality of spring members projecting in an axial direction along which the axis of the member extends. One end of the spring member protrudes toward the axis of the housing member, and engages with a flange provided on the outer peripheral surface of the fuse tube when the fuse tube is attached to or detached from the high pressure cutout. A claw is provided. [Selection drawing] Fig. 2

Description

The present specification discloses techniques relating to operating rods for attaching and detaching fuse cylinders used in high pressure cutouts.

In order to protect the transformer and the like, a high-voltage cutout in which the fuse cylinder is housed in a porcelain insulator is used. When opening / closing the distribution line or replacing the fuse cylinder, the operator attaches / detaches the fuse cylinder using an operation rod in order to ensure the safety and ease of work. Patent Document 1 discloses an operating rod provided with an elastic plate that can be engaged with a fuse cylinder. The operation rod of Patent Document 1 is provided with a claw portion at the tip of an elastic plate. When attaching the fuse cylinder to the high-pressure cutout, press the operating rod against the fuse cylinder, engage the claw with the crossguard provided on the fuse cylinder, and hold the fuse cylinder at high pressure with the fuse cylinder fixed to the operating rod. Insert into the cutout. After attaching the fuse tube to the specified position of the high-pressure cutout, when the operating rod is pressed against the fuse tube, the elastic plate is deformed (opens outward) and the claw and crossguard are disengaged (the operating rod is disengaged). Separate from the fuse tube). When removing the fuse cylinder from the high-pressure cutout, the operating rod is pressed against the fuse cylinder to engage the claws with the fuse cylinder, and the fuse cylinder is pulled out from the high-pressure cutout with the fuse cylinder fixed to the operating rod.

Jikkensho 35-17 063

As described above, the operation rod of Patent Document 1 presses the fuse cylinder against the operation rod (or presses the operation rod against the fuse cylinder) to fix the fuse cylinder and the operation rod. Also, when separating the fuse cylinder and the operating rod after inserting the fuse cylinder into the high-pressure cutout, the operating rod is pressed against the fuse cylinder. In the operation rod of Patent Document 1, when the operation rod is strongly pressed against the fuse cylinder when the fuse cylinder is removed from the high pressure cutout, the claw portion (elastic plate) and the flange portion of the fuse cylinder do not engage and the fuse cylinder is cut at high pressure. It can happen that it cannot be removed from the out. More specifically, by strongly pressing the operating rod against the fuse cylinder, the claw and the cross are once engaged, and then the elastic plate is deformed (opens outward), and the claw and the cross are engaged. It may come off. In this case, it is necessary to return the deformed elastic plate to the original shape and remove the fuse cylinder again, resulting in poor work efficiency. There is a need for an operating rod that can more reliably fix and separate the fuse tube. It is an object of the present specification to provide a novel operating rod capable of reliably attaching and detaching a fuse cylinder.

The operation rod disclosed in the present specification is an operation rod for attaching / detaching a fuse cylinder used in a high-pressure cutout, and is fixed to the operation rod main body and the tip of the operation rod main body, and the end of the fuse cylinder. A tubular accommodating member capable of accommodating a portion, a support member that surrounds the outer periphery of the accommodating member and is attached to the outer periphery of the operating rod body in a loosely fitted state, and is arranged between the accommodating member and the support member. One end is protruding from the tip of the accommodating member in the axial direction in which the axis of the accommodating member extends, and the other end is on the axial side of the accommodating member. It may be provided with a spring member that protrudes toward the fuse cylinder and is provided with a claw portion that engages with a flange portion provided on the outer peripheral surface of the fuse cylinder when the fuse cylinder is attached to or detached from the high pressure cutout.

A cross-sectional view of a high pressure cutout is shown. A partial cross-sectional view of the operation rod of the first embodiment is shown. The cross-sectional view of the spring member is shown. The perspective view of the support member of 1st Example is shown. The perspective view of the accommodating member is shown. The perspective view for demonstrating the state in which the operation rod is attached to the fuse cylinder is shown. A partial cross-sectional view of the operation rod of the second embodiment is shown. The perspective view of the cylinder of the 2nd Example is shown. The perspective view of the support member of 2nd Example is shown.

(High voltage cutout)
The high voltage cutout is connected between the distribution line and a device such as a transformer via an external electric wire. The high-pressure cutout includes a cylindrical main body insulator made of porcelain and a fuse cylinder housed in the main body insulator. High pressure cutouts are sometimes referred to as cylindrical cutouts. The fuse tube can be removed from the high pressure cutout. When the fuse tube is inserted into the insulator of the main body, the distribution line and equipment such as a transformer are connected (the distribution line is closed). If the fuse cylinder is removed from the main body (opens the distribution line), or if an excessive current (current exceeding the specified value) flows through the high-voltage cutout (fuse cylinder) and the fuse element inside the fuse cylinder blows, the distribution line and the distribution line The distribution line between the devices is cut off. If the fuse element is blown, the distribution line and the equipment can be reconnected by replacing the fuse cylinder.

(Operation rod)
The operating rod is used to attach / detach the fuse tube to the high pressure cutout. The operation rod is arranged between the operation rod main body, the cylindrical accommodating member fixed to the tip of the operation rod main body, the support member surrounding the outer periphery of the accommodating member, and the accommodating member and the support member. A spring member may be provided. In the following description, for each of the above members (accommodating member, support member, and spring member), the side located on the fuse cylinder side when the fuse cylinder is removed is referred to as the tip side (in the axial direction), and is separated from the fuse cylinder. The side located on the side may be referred to as the base side.

The accommodating member can accommodate the end of the fuse cylinder when the fuse cylinder is attached to and detached from the high pressure cutout. The accommodating member may be cylindrical. Further, an engaging portion protruding toward the axis (central axis) side of the accommodating member may be provided on the inner peripheral surface on the tip end side of the accommodating member. The engaging portion is formed so as to extend in the circumferential direction of the accommodating member, and may be formed in a part of the accommodating member in the circumferential direction. That is, the inner peripheral surface of the accommodating member may be provided with a portion in which the engaging portion is formed and a portion in which the engaging portion is not formed. A plurality of engaging portions may be provided on the inner peripheral surface of the accommodating member. When a plurality of engaging portions are provided on the inner peripheral surface of the accommodating member, the engaging portions may be arranged at equal intervals in the circumferential direction of the accommodating member. When the two engaging portions are provided on the accommodating member, the two engaging portions may be provided at positions symmetrical with respect to the axis of the accommodating member.

The engaging portion engages with a protrusion provided on the outer peripheral surface of the fuse cylinder when the fuse cylinder is removed from the high pressure cutout. More specifically, when removing the fuse cylinder from the high-pressure cutout, first, the accommodating member is placed at the end of the fuse cylinder so that the protruding portion of the fuse cylinder passes through the portion where the engaging portion of the accommodating member is not provided. To insert. Next, the operating rod is rotated so that the engaging portion faces the protruding portion in the axial direction. By facing the engaging portion and the protruding portion, the protruding portion engages with the engaging portion when the fuse cylinder is pulled out, and the fuse cylinder can be reliably held in the accommodating member. When removing the fuse cylinder from the high pressure cutout, the fuse cylinder and the operating rod are prevented from separating, and the fuse cylinder can be safely removed from the high pressure cutout.

The support member may be attached to the outer periphery of the operating rod body in a loosely fitted state so as to surround the outer periphery of the accommodating member. When the accommodating member is fixed to the operating rod body, the support member is also in a loose fitting state with respect to the accommodating member. The support member may be provided with a reduced diameter portion having an inner diameter smaller than that of other portions at the end portion on the base side side. Further, the fixing member may be fixed to the operation rod main body on the base side of the accommodating member. The fixing member may be fixed to the operating rod body so that a gap is provided between the axial end of the fixing member and the axial base end of the accommodating member in the axial direction. Then, the support member may be attached to the operation rod main body so that the reduced diameter portion of the support member is located in the gap between the fixing member and the accommodating member. In this case, the gap between the fixing member and the accommodating member may be 0.2 mm to 1 mm larger than the thickness of the reduced diameter portion (length in the axial direction). As a result, the support member can move in the axial direction with respect to the operation rod main body and the accommodating member. Further, the inner diameter of the reduced diameter portion may be larger than the outer diameter of the operating rod main body. As described above, the support member is not fixed to the accommodating member but is in a loose fitting state, and is attached to the operation rod main body so as to surround the outer periphery of the accommodating member. Therefore, the support member is rotatable with respect to the operating rod body and the accommodating member. It can be considered that the support member is attached to the operation rod main body in a state where it can move and rotate in the axial direction with respect to the operation rod main body and the accommodating member.

A plurality of grooves extending in the axial direction may be provided on the inner peripheral surface of the support member. The groove may accommodate a portion of the spring member. More specifically, the groove portion may accommodate from the base side end of the spring member to the intermediate portion in the axial direction. In other words, the portion from the base side end of the spring member to the intermediate portion in the axial direction is fitted in the groove portion of the support member. The portion from the tip end to the intermediate portion of the spring member is not accommodated (fitted) in the groove. As described above, the spring member is arranged between the accommodating member and the supporting member. By forming a groove on the inner peripheral surface of the support member and accommodating the spring member in the groove, the gap between the accommodating member and the support member can be reduced. Of the spring members, the portion accommodated (fitted) in the groove of the support member is restricted from being deformed in the radial direction (direction orthogonal to the axial direction) by the support member. That is, only the portion of the spring member that is not housed in the groove of the support member functions as a "spring".

Further, the inner peripheral surface on the tip end side of the support member may be provided with an inclined portion whose inner diameter increases toward the end portion (tip end side end portion) in the axial direction. Specifically, the inclined portion may be provided on the tip end side of the support member rather than the position where the groove portion described above is provided. The inclined portion and the groove portion may be continuous. By providing the inclined portion, the spring member can be deformed in the radial direction when a radial force is applied to the spring member. That is, when the support member is provided with the groove portion and the inclined portion, the spring member functions as a "spring" on the tip side of the support member rather than the position facing the base side end (the tip end side end of the groove portion) of the inclined portion.

The spring member may be arranged between the accommodating member and the support member in a loosely fitted state with respect to the accommodating member and the operating rod body. As described above, the support member is rotatable with respect to the operating rod body and the accommodating member. Therefore, when a part of the spring member is accommodated in the groove portion of the support member, the spring member can also rotate with respect to the operation rod main body and the accommodating member. Further, a claw portion protruding toward the axis side of the accommodating member may be provided on the tip end side (one end portion) of the spring member. The claw portion engages with the collar portion provided on the outer peripheral surface of the fuse cylinder when the fuse cylinder is attached to and detached from the high pressure cutout. When attaching / detaching the fuse cylinder to the high-pressure cutout, the fuse cylinder can be fixed to the operating rod (accommodating member) by supporting the flange portion of the fuse cylinder with the claw portion. The claw portion (one end of the spring member) may protrude from the tip of the accommodating member in the axial direction. Further, the base side end of the spring member (the other end of the spring member) may be provided with a regulating portion that is bent toward the axis line. By providing the regulating portion, it is possible to prevent the regulating portion from coming into contact with the end surface of the accommodating member on the base side and the spring member from moving in the axial direction. In other words, by providing the regulating portion, it is possible to prevent the spring member from coming off between the accommodating member and the supporting member.

(High voltage cutout)
The high voltage cutout 100 will be described with reference to FIG. The high voltage cutout 100 is provided on the distribution line and is used to protect equipment such as a transformer. The high-voltage cutout 100 includes a main body insulator 8 made of porcelain, a first electrode 56 connected to the distribution line side, an arc extinguishing rod 54 arranged inside the first electrode 56, and a first unit connected to the device side. It includes a two-electrode 46 and a fuse cylinder 12 connecting the first electrode 56 and the second electrode 46. The main body insulator 8 has a cylindrical shape, and a plurality of insulating folds 14 are provided on the outer peripheral surface. In the main body insulator 8, a columnar first chamber 4 and a columnar second chamber 20 having a diameter larger than that of the first chamber 4 are formed. A cylindrical arc extinguishing cylinder 6 is arranged in the first chamber 4. The fuse cylinder 12 is arranged inside the arc extinguishing cylinder 6. The high-pressure cutout 100 is installed so that the first chamber 4 is on the upper side and the second chamber 20 is on the lower side in the direction of gravity. The first electrode 56 is arranged in the first chamber 4, and the second electrode 46 is arranged in the second chamber 20. Hereinafter, in the direction in which the fuse cylinder 12 extends (that is, the direction of gravity), the first electrode 56 side is referred to as "upper side", "upper side", etc., and the second electrode 46 side is referred to as "lower side", "lower side", etc. Sometimes. The first electrode 56 can be regarded as the upper electrode of the high voltage cutout 100, and the second electrode 46 can be regarded as the lower electrode of the high voltage cutout 100.

A conical upper mold cone 2 is fixed to the upper part of the main body insulator 8 by an adhesive. The leader wire of the upper mold cone 2 is connected to the distribution line. A conical lower mold cone 28 is fixed to the lower side wall 24 of the main body insulator 8 by an adhesive. The leader wire of the lower mold cone 28 is connected to a device such as a transformer.

The fuse cylinder 12 extends from the first chamber 4 to the second chamber 20 and connects the first electrode 56 and the second electrode 46. The fuse cylinder 12 includes an insulating cylinder 50 accommodating the fuse 10, an upper contact 52 provided on the upper portion of the insulating cylinder 50, a lower contact 48 provided on the lower portion of the insulating cylinder 50, and a lower portion. A display cylinder 58 provided below the contactor 48 is provided. The upper contactor 52 is connected to the first electrode 56, and the lower contactor 48 is connected to the second electrode 46. A cushioning member 18 is arranged between the lower contactor 48 and the upper surface of the second chamber. Below the lower contactor 48, a flange portion 26 and a protruding portion 42 are provided on the side surface of the fuse cylinder 12. The crossguard portion 26 makes a substantially circle around the fuse cylinder 12, and two protruding portions 42 are provided at an angular interval of 180 degrees in the circumferential direction. The display cylinder 58 is fixed to the insulating cylinder 50. On the other hand, the lower contactor 48 can be displaced in the vertical direction with respect to the insulating cylinder 50 and the display cylinder 58. The display cylinder 58 constitutes the lower end of the fuse cylinder 12.

The fuse 10 includes a fuse element 16 arranged in the insulating cylinder 50 and a fuse lead wire 40 connected to the fuse element 16. The fuse lead wire 40 is folded upward from the lower end of the display cylinder 58 outside the display cylinder 58, and is fastened and fixed to a tightening screw 60 attached to the lower contactor 48. A spring 44 is arranged between the lower contactor 48 and the display cylinder 58 in a compressed state. Therefore, a tensile force is applied to the fuse lead wire 40. In other words, the spring 44 is compressed by tightening and fixing the fuse lead wire 40 to the tightening screw 60.

An opening 38 is provided on the lower side of the main body insulator 8 (the lower end of the second chamber 20). The opening 38 is closed by the lid member 34. The lid member 34 is fixed to the inner wall 30 of the second chamber 20 by an adhesive 36. The lid member 34 has a bottomed cylindrical shape, and has a shaft portion 34a, a collar portion 34b provided on the outer peripheral surface of the shaft portion 34a, and an opening / closing portion (bottom portion) provided on the inner peripheral surface of the shaft portion 34a. 32 is provided. The collar portion 34b is provided at an intermediate portion in the vertical direction of the shaft portion 34a, projects outward in the radial direction, and goes around the outer circumference of the shaft portion 34a. The opening / closing portion 32 is provided below the collar portion 34b and above the lower end of the shaft portion 34a. Therefore, the lower end of the shaft portion 34a constitutes a protrusion 34c that projects downward with respect to the opening / closing portion 32. The opening / closing portion 32 is protected by the protrusion 34c. The lid member 34 (including the opening / closing portion 32) is made of an elastic material such as rubber or a soft synthetic resin. Further, crushed pieces (not shown) such as insulators are fixed to the inner wall 30, and fine protrusions are formed. By forming fine protrusions on the inner wall 30, the lid member 34 can be firmly fixed to the inner wall 30.

The opening / closing portion 32 is provided with a radial notch 32a. Therefore, the fuse cylinder 12 and the like can easily pass through the opening / closing portion 32. That is, when the fuse cylinder 12 or the like passes through the opening / closing portion 32, the opening / closing portion 32 is deformed to open the opening / closing portion 32, and after the fuse cylinder 12 or the like passes, the opening / closing portion 32 returns to the original shape and closes. As described above, since the opening / closing portion 32 (cover member 34) is made of an elastic material, it can be easily deformed (elastically deformed) and opened / closed by providing the notch 32a.

The lid member 34 is attached to the opening 38 of the second chamber 20 with the adhesive 36 applied to the inner wall 30. When the lid member 34 is attached, the shaft portion 34a is inserted into the second chamber 20 until the upper surface of the collar portion 34b comes into contact with the opening 38. As a result, the lid member 34 is positioned with respect to the main body insulator 8. When the lid member 34 is inserted into the second chamber 20, the gap between the outer peripheral surface of the shaft portion 34a and the inner wall 30 is filled with the adhesive 36, and the lid member 34 is fixed to the main body insulator 8. By fixing the lid member 34 to the main body insulator 8, the opening 38 is closed.

In the high-voltage cutout 100, the fuse element 16 is blown when a current exceeding a specified value flows through the distribution path in which the high-voltage cutout 100 is arranged. As a result, the spring 44 expands, and the fuse cylinder 12 (parts other than the lower contact 48) moves downward while the lower contact 48 is connected to the second electrode 46. When the fuse cylinder 12 moves downward, the display cylinder 58 is exposed from the lid member 34 (opening / closing portion 32) to the lower part of the high-pressure cutout 100. That is, by confirming whether or not the display cylinder 58 is exposed below the high-voltage cutout 100, it is possible to determine whether or not the fuse element 16 is blown (whether or not the fuse cylinder 12 needs to be replaced). Even if the fuse element 16 is blown, the lower contactor 48 continues to be connected (fixed) to the second electrode 46. Therefore, the fuse cylinder 12 (display cylinder 58) moves downward due to the elastic force and gravity of the spring 44, but is prevented from falling from the high-pressure cutout 100.

When the fuse element 16 is blown (the display cylinder 58 is exposed from the main body insulator 8), the fuse cylinder 12 is pulled out from the main body insulator 8 in order to replace the fuse cylinder 12. When opening (releasing the load) the distribution line on which the high-voltage cutout 100 is arranged due to construction work or the like, the operation rod 70 is moved from the bottom surface (opening / closing portion 32) of the lid member 34 to the inside of the lid member 34 (inside the main body insulator 8). ), And the fuse cylinder 12 is pulled out from the main body insulator 8. In this case, when the fuse cylinder 12 is pulled out, an arc is generated between the upper contactor 52 and the first electrode 56. However, the arc heat melts a part of the arc extinguishing rod 54 and the arc extinguishing cylinder 6 to generate an arc extinguishing gas, and the arc is extinguished by the arc extinguishing gas. Further, when the fuse cylinder 12 is inserted into the main body insulator 8, the fuse cylinder 12 is inserted from the bottom surface of the lid member 34 to the inside of the lid member 34. The operator uses the operating rod 70 when inserting the fuse cylinder 12 into the main body insulator 8 and pulling out the fuse cylinder 12 from the main body insulator 8 (attaching / detaching the fuse cylinder 12 to the high voltage cutout 100). Hereinafter, the operation rod 70 will be described.

(Operating rod: 1st Example)
The operation rod 70 will be described with reference to FIG. As shown in FIG. 2, the operation rod 70 has a rod shape and extends in the axial direction 72 of the accommodating member 86. The operation rod 70 includes an operation rod main body 74 and a detachable portion 80 provided at the tip (one end in the axis 72 direction) of the operation rod main body 74. The operation rod main body 74 has a cylindrical shape. The attachment / detachment portion 80 is formed between the accommodating member 76 fixed to the operation rod main body 74, the support member 84 attached to the operation rod main body 74 in a loosely fitted state, and the operation rod main body between the accommodating member 86 and the support member 84. A spring member 90 attached to the 74 in a loosely fitted state, a fixing member 76 fixed to the operation rod main body 74 on the base side of the accommodating member 86, and a protective member 82 fixed to the fixing member are provided. There is. The accommodating member 86 is screwed to the operation rod main body 74. Specifically, a male screw (not shown) is provided on the outer peripheral surface of the operation rod main body 74, and a female screw (not shown) is provided on the inner peripheral surface of the accommodating member 86, and the inner peripheral surface of the accommodating member 86 is provided. The accommodating member 86 is fixed to the operating rod main body 74 by screwing the accommodating member 86 into the operating rod main body 74 with the adhesive applied to (the portion where the female screw is provided). Details of the accommodating member 86 will be described later. Further, the fixing member 76 is fixed to the operation rod main body 74 by the fixing screw 75. A gap is provided between the fixing member 76 and the accommodating member 86 in the direction of the axis 72.

The support member 84 has a cylindrical shape, and an inclined portion 84b is provided on the tip end side, and a reduced diameter portion 84a having an inner diameter smaller than that of other portions is provided on the base portion side. The portion of the support member 84 that is not provided with the reduced diameter portion 84a surrounds the outer periphery of the accommodating member 86. When the support member 84 is attached to the operation rod main body 74, the reduced diameter portion 84a side is inserted into the operation rod main body 74. Further, the reduced diameter portion 84a surrounds the outer circumference of the operating rod main body 74, and is located between the fixing member 76 and the accommodating member 86 in the axial line 72 direction. The support member 84 is not fixed to the operation rod main body 74 and the accommodating member 86. Therefore, the support member 84 is movable and rotatable in the axis 72 direction with respect to the operation rod main body 74 and the accommodating member 86. However, since the reduced diameter portion 84a is located between the fixing member 76 and the accommodating member 86, the reduced diameter portion 84a comes into contact with the fixing member 76 and the accommodating member 86 when the support member 84 moves in the axial direction 72 direction. .. Therefore, the support member 84 does not come off from the operation rod main body 74. A spring member 90 is fixed (fitted) to the support member 84. Details of the support member 84 will be described later.

The protective member 82 is fixed to the fixing member 76. Specifically, a male screw (not shown) is provided on the outer peripheral surface of the fixing member 76, and a female screw (not shown) is provided on the inner peripheral surface of the protective member 82, and the inner peripheral surface of the protective member 82 (not shown). The protective member 82 is fixed to the fixing member 76 by screwing the protective member 82 into the fixing member 76 with the adhesive applied to the portion where the female screw is provided). The protective member 82 surrounds the outer periphery of the support member 84 and protects the support member 84, the spring member 90, and the fixing member 76.

The spring member 90, the support member 84, and the accommodating member 86 will be described with reference to FIGS. 3 to 5. As shown in FIG. 3, the spring member 90 includes a straight portion 90b, a claw portion 90c provided on one end side (tip side), and a regulation portion 90a provided on the other end side (base side). (See also Fig. 2). The regulating portion 90a is bent approximately 90 degrees with respect to the straight portion 90b. Further, the base side of the claw portion 90c is bent with respect to the straight portion 90b in the same direction as the regulation portion 90a. More specifically, the base side of the claw portion 90c is inclined with respect to the straight portion 90b. The tip end side of the claw portion 90c is bent (inclined) with respect to the straight portion 90b in the direction opposite to the regulating portion 90a. The inclination angle of the claw portion 90c (base side and tip side) with respect to the straight portion 90b is adjusted in the range of 100 degrees to 150 degrees. For example, both inclination angles of the claw portion 90c with respect to the straight portion 90b are approximately 120 degrees. The end 90e on one end side of the claw 90c is bent 180 degrees.

As shown in FIG. 4, a plurality of groove portions 84c extending in the axial direction 72 direction (see also FIG. 2) are provided on the inner peripheral surface of the support member 84. In the axis 72 direction, the groove portion 84c extends from the intermediate portion of the support member 84 to the base side end portion. The lateral width of the groove portion 84c (the length of the support member 84 in the circumferential direction) is formed to be slightly larger than the lateral width of the spring member 90. Further, the groove depth of the groove portion 84c (the length of the support member 84 in the radial direction) is formed to be slightly larger than the plate thickness of the spring member 90. The groove portions 84c are provided at equal intervals in the circumferential direction of the support member 84. A part of the straight portion 90b of the spring member 90 is fitted into the groove portion 84c. That is, in the spring member 90, a part of the straight portion 90b is fixed to the groove portion 84c of the support member 84, and a part of the claw portion 90c and the straight portion 90b can move freely with respect to the support member 84. Further, the inner peripheral surface of the support member 84 is provided with an inclined portion 84b whose inner diameter increases toward the tip in the axis 72 direction. When the spring member 90 is attached (fitted) to the support member 84, the straight portion 90b faces the inclined portion 84b (see also FIG. 2). The portion of the spring member 90 that fits into the groove portion 84c (a part of the straight portion 90b) does not deform even when a force is applied to the spring member 90. On the other hand, the portion of the spring member 90 that is not fitted in the groove portion 84c (a part of the straight portion 90b and the claw portion 80c) is elastically deformed when a force is applied to the spring member 90.

As shown in FIG. 5, two engaging portions 86a are provided on the tip end side of the accommodating member 86. The engaging portion 86a projects toward the center side of the accommodating member 86 (axis 72 side: also see FIG. 2). The two engaging portions 86a are provided at positions symmetrical with respect to the axis 72. The engaging portion 86a is formed by bending a part of the tip of the accommodating member 86 inward. A stopper 87 extending in the axis 72 direction is provided on one end of the engaging portion 86a. As shown in FIG. 2, the straight portion 90b of the spring member 90 is in contact with the outer peripheral surface of the accommodating member 86 via the tubular body 85. Therefore, even if a force is applied to the spring member 90, the spring member 90 (straight line portion 90b) is not deformed to the axis 72 side. That is, the spring member 90 elastically deforms outward in the radial direction of the accommodating member 86, but does not deform in the radial direction of the accommodating member 86. The tubular body 85 is fitted (fixed) to the outer periphery of the accommodating member 86. Therefore, the tubular body 85 and the accommodating member 86 can be regarded as one accommodating member together. By providing the tubular body 85, it is possible to prevent the spring member 90 existing at a position facing the engaging portion 86a of the accommodating member 86 from being deformed inward in the radial direction of the accommodating member 86. That is, in the circumferential direction of the accommodating member 86, the contact area between the accommodating member 86 and each spring member 90 (actually, the contact area between the tubular body 85 and the spring member 90) is made uniform, and a specific spring member 90 (engagement portion). It is possible to prevent the spring member 90) facing the 86a from being deformed inward in the radial direction.

Returning to FIG. 2, the features of the operation rod 70 will be further described. The spring member 90 is attached to the support member 84 so that the tip of the regulating portion 90a (see also FIG. 3) faces the axis 72 direction. As a result, the regulating portion 90a is between the reduced diameter portion 84a of the support member 84 and the end surface 86e on the base side of the accommodating member 86, and between the reduced diameter portion 84a of the support member 84 and the end surface 85a on the base side of the tubular body 85. Located in. The straight portion 90b of the spring member 90 is located between the inner surface of the support member 84 and the outer surface of the tubular body 85 (accommodating member). As a result, it is possible to prevent the spring member 90 from coming off from the operation rod main body 74. That is, even if a force that moves in the direction of the axis 72 is applied to the spring member 90, the regulating portion 90a comes into contact with the support member 84 (diameter reduced portion 84a), the accommodating member 86, or the tubular body 85, so that the spring member 90 can move. The spring member 90 is restricted and does not come off from the accommodating member 86 (operating rod body 74). Further, even if a force moving in the radial direction (direction orthogonal to the axis 72) is applied to the spring member 90, the straight portion 90b of the spring member 90 comes into contact with the inner surface of the support member 84 or the outer surface of the tubular body 85, and further. Since the regulating portion 90a comes into contact with the accommodating member 86 and / or the tubular body 85, the spring member 90 does not come off from the accommodating member 86 (operating rod body 74).

Further, since the claw portion 90c is bent in the same direction as the regulation portion 90a with respect to the straight portion 90b, the tip of the claw portion 90c is in the axis 72 direction from the inner peripheral surface of the accommodating member 86 when observed from the axis 72 direction. Located on the side. In other words, the circle (virtual circle) formed by connecting the tips of the claws 90c is located inside the inner peripheral surface of the accommodating member 86. The claw portion 90c does not protrude from the tip of the protective member 82, and the end portion 90e protrudes from the tip of the protective member 82. That is, in the radial direction of the detachable portion 80, the claw portion 90c is surrounded by the protective member 82, and the end portion 90e is not surrounded by the protective member 82. Therefore, when the tip end side of the spring member 90 is deformed radially outward, the end portion 90e is prevented from coming into contact with the protective member 82, and a large amount of deformation of the spring member 90 can be secured.

In the straight portion 90b of the spring member 90, the base side (regulating portion 90a side) is housed in the groove portion 84c of the support member 84, and the tip end side (claw portion 90c side) is not housed in the groove portion 84c. The support member 84 is provided with an inclined portion 84b, and a part of the straight portion 90b on the tip end side is surrounded by the inclined portion 84b. Therefore, when the straight portion 90b of the spring member 90 is deformed (when the spring member 90 spreads outward in the radial direction), the straight portion 90b can be smoothly deformed (deformation of the straight portion 90b hinders the support member 84). Will not be done). As described above, the support member 84 is rotatable with respect to the operating rod body 74 and the accommodating member 86. Further, the spring member 90 is fixed (fitted) to the support member 84. Therefore, the spring member 90 is also rotatable with respect to the operation rod main body 74 and the accommodating member 86. In other words, the operating rod body 74 and the accommodating member 86 are rotatable with respect to the support member 84 and the spring member 90.

A method of attaching / detaching the fuse cylinder 12 and the operating rod 70 will be described with reference to FIG. When attaching the fuse cylinder 12 to the high-voltage cutout 100, the operator first attaches the fuse cylinder 12 to the operating rod 70. Specifically, the lower end portion (display cylinder 58 side) of the fuse cylinder 12 is pushed into the accommodating member 86, and the collar portion 26 of the fuse cylinder 12 is engaged with the claw portion 90c of the spring member 90. When the fuse cylinder 12 is pushed into the accommodating member 86, the collar portion 26 of the fuse cylinder 12 collides with the spring member 90 (claw portion 90c), and the spring member 90 (straight line portion 90b) is elastically deformed outward in the radial direction. When the collar portion 26 crosses the top of the claw portion 90c, the spring member 90 returns to the shape before elastic deformation, and the claw portion 90c engages with the collar portion 26. When the fuse cylinder 12 is pushed into the accommodating member 86, the end portion of the fuse cylinder 12 is accommodated so that the protruding portion 42 of the fuse cylinder 12 passes through the portion of the accommodating member 86 where the engaging portion 86a is not provided. Push it into the member 86.

After attaching the fuse cylinder 12 to the operating rod 70, the operator inserts the fuse cylinder 12 into the main body insulator 8 and sandwiches the upper contactor 52 between the first electrodes 56 to hold the upper contactor 52 and the first electrode 56. After connecting, the lower contactor 48 is sandwiched between the second electrodes 46 to connect the two, and then the operating rod 70 is pulled out downward (see also FIG. 1). When the operating rod 70 is pulled out, the fuse cylinder 12 is held in the high-pressure cutout 100 by the holding force of the first electrode 56 and the holding force of the second electrode 46, so that the spring member 90 is elastically deformed and becomes the flange portion 26. The fuse cylinder 12 and the operating rod 70 can be separated from each other in a state where the claw portion 90c is disengaged and the fuse cylinder 12 remains on the main body porcelain 8.

When the fuse cylinder 12 is pulled out from the high-pressure cutout 100, the operator pushes the end portion of the fuse cylinder 12 into the accommodating member 86 in the same manner as when attaching the fuse cylinder 12 to the high-pressure cutout 100. After the claw portion 90c of the spring member 90 engages with the collar portion 26 of the fuse cylinder 12, the operator holds the operation rod 70 (operation rod body 74) while maintaining the engagement between the claw portion 90c and the collar portion 26. Rotate. Specifically, the operating rod 70 is rotated so that the protruding portion 42 of the fuse cylinder 12 faces the engaging portion 86a of the accommodating member 86. As a result, the protruding portion 42 engages with the engaging portion 86a. When the operating rod 70 is rotated, the protruding portion 42 of the fuse cylinder 12 comes into contact with the stopper 87, and the operating rod 70 cannot be rotated. Therefore, the operator engages the protruding portion 42 with the engaging portion 86a. You can recognize what you have done. After engaging the protruding portion 42 and the engaging portion 86a, the fuse cylinder 12 is pulled out from the high-pressure cutout 100 by moving the operating rod 70 downward. Since the protruding portion 42 and the engaging portion 86a are engaged, the fuse cylinder 12 is firmly sandwiched by the main body insulator 8, and even if both are firmly connected (the upper contactor 52 and the lower contactor 48 are the first). The fuse cylinder 12 can be reliably pulled out from the main body insulator 8 even if it is firmly sandwiched between the 1 electrode 56 and the lower contactor 48 and both are firmly connected).

As described above, the operating rod body 74 and the accommodating member 86 are rotatable with respect to the support member 84 and the spring member 90. Therefore, even if the operation rod main body 74 is rotated while the end of the fuse cylinder 12 is accommodated in the accommodating member 86, the support member 84 and the spring member 90 do not rotate with respect to the fuse cylinder 12. Therefore, when the fuse cylinder 12 is pulled out from the high-voltage cutout 100, it is possible to prevent the parts (fuse lead wire 40, etc.) arranged on the outer surface of the fuse cylinder 12 from being damaged. Further, the spring member 90 is fixed (fitted) to the support member 84, and the support member 84 and the spring member 90 are loosely fitted to the operation rod main body 74 (accommodating member 86). Therefore, the operation rod 70 can be easily attached to and detached from the fuse cylinder 12, and the support member 84 and the spring member 90 can be prevented from being damaged when the fuse cylinder 12 is inserted into the operation rod 70.

(Modification example of operating rod: Second embodiment)
A modified example of the operation rod 70 will be described with reference to FIGS. 7 to 9. In the description of this embodiment, the same features of the operation rod 70 of the first embodiment will be omitted by assigning the same reference number as the reference number assigned to the operation rod 70 of the first embodiment. There is. The operating rod 70 of this embodiment uses a tubular body 85 having a plurality of grooves 85b on the outer peripheral surface 85c and a support member 84 having no grooves on the inner peripheral surface (compare FIGS. 2 and 3). reference).

In the operation rod 70 of this embodiment, the tubular body 85 is attached to the outer periphery of the accommodating member 86 in a loosely fitted state. More specifically, the inner peripheral surface of the tubular body 85 is not provided with irregularities (grooves or the like), and the inner peripheral surface of the tubular body 85 is slidable with respect to the outer peripheral surface of the accommodating member 86. .. Therefore, the tubular body 85 is rotatable with respect to the accommodating member 86 and the operation rod main body 74. Further, the support member 84 is fixed (fitted) to the tubular body 85. Therefore, the support member 84 can also rotate with respect to the operation rod main body 74.

A plurality of groove portions 85b are provided on the outer peripheral surface 85c of the tubular body 85. The groove 85b extends from one end to the other end in the axis 72 direction. Further, the outer peripheral surface 85c of the tubular body 85 is provided with a convex portion 85d protruding in the radial direction. In the direction of the axis 72, the convex portion 85d is provided from the distal end surface of the tubular body 85 to the intermediate portion of the tubular body 85. On the outer peripheral surface 85c of the tubular body 85, there is a step at the boundary between the portion where the convex portion 85d is provided (the tip end side of the tubular end 85) and the portion where the convex portion 85d is not provided (the base side of the tubular end 85). It is provided. The support member 84 is fitted into a portion of the outer peripheral surface 85 of the tubular body 85 where the convex portion 85d is not provided. In other words, in the support member 84, the convex portion 85d of the tubular body 85 is more than the end face on the tip end side of the support member 84 (the end face on the side opposite to the end face on which the diameter reduction portion 84a is provided in the axis 72 direction). It is fixed to the tubular body 85 so as to be located on the tip side of the.

In the operation rod 70 of this embodiment, the straight portion 90b (see FIG. 3) of the spring member 90 is housed in the groove portion 85b provided on the outer peripheral surface 85c of the tubular body 85. The spring member 90 is not fixed (fitted) to the groove 85b. The spring member 90 is a part of the straight portion 90b of the spring member 90 (a portion sandwiched between the tubular body 85 and the support member 84) by fixing (fitting) the support member 84 to the outer peripheral surface 85c of the tubular body 85. Is fixed to the cylinder 85. Therefore, the tip side portion of the spring member 90 (the portion where the convex portion 85d is provided in the axial direction 72 direction) is deformable in the radial direction. In the operation rod 70 of the present embodiment, the spring member 90 is rotatable with respect to the operation rod main body 74 and the accommodating member 86, similarly to the operation rod 70 of the first embodiment. Therefore, the operation rod 70 of the present embodiment can obtain the same effect as the operation rod 70 of the first embodiment described above.

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of claims. The techniques described in the claims include various modifications and modifications of the specific examples illustrated above. In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques illustrated in the present specification or drawings can achieve a plurality of purposes at the same time, and achieving one of the purposes itself has technical usefulness.

12: Fuse cylinder 26: Crossguard 42: Projection 70: Operation rod 72: Axis line of accommodating member 74: Operation rod body 82: Protective member 84: Support member 84a: Reduced diameter portion 84b: Inclined portion 84c: Groove portion 85: Cylinder Body 86: Accommodating member 86a: Engaging portion 90: Spring member 90c: Claw portion 100: High pressure cutout

Claims (9)

An operating rod for attaching and detaching the fuse cylinder used in high-voltage cutouts.
The operation rod body and
A cylindrical accommodating member that is fixed to the tip of the operating rod body and can accommodate the end of the fuse cylinder,
A support member that surrounds the outer circumference of the accommodating member and is attached to the outer circumference of the operating rod body in a loosely fitted state.
It is arranged between the accommodating member and the support member and is in a loosely fitted state with respect to the accommodating member, and one end of the accommodating member protrudes from the tip of the accommodating member in the direction of the axis extending the axis of the accommodating member. The end of the fuse tube protrudes toward the axis side of the accommodating member, and a claw portion that engages with a collar provided on the outer peripheral surface of the fuse tube when the fuse tube is attached to or detached from the high-pressure cutout is provided. Spring member and
The operation rod equipped with. A fixing member fixed to the operation rod body is provided on the base side opposite to the tip of the accommodating member in the axial direction.
The operating rod according to claim 1, wherein the support member and the spring member are arranged in a loosely fitted state between the accommodating member and the fixing member. In the axial direction, the other end of the spring member opposite to the one end is bent toward the axial side, and the spring member is restricted from moving in the axial direction in contact with the base side end surface of the accommodating member. The operation rod according to claim 1 or 2, wherein the regulation unit is provided. The operating rod according to any one of claims 1 to 3, wherein a reduced diameter portion having an inner diameter smaller than that of the other portion is provided on the base side of the support member. A plurality of grooves extending in the axial direction are provided on the inner peripheral surface of the support member.
The operating rod according to any one of claims 1 to 4, wherein the spring member is fitted in the groove. The operating rod according to any one of claims 1 to 5, wherein an inclined portion whose inner diameter increases toward the end in the axial direction is provided on the tip end side of the support member. An operating rod for attaching and detaching the fuse cylinder used in high-voltage cutouts.
The operation rod body and
A cylindrical accommodating member that is fixed to the tip of the operating rod body and can accommodate the end of the fuse cylinder,
A cylinder attached to the outer circumference of the accommodating member in a loosely fitted state,
Support members fixed to the outer circumference of the cylinder and
It is arranged between the cylinder and the support member and is fixed to the cylinder, one end of which protrudes from the tip of the accommodating member in the direction of the axis extending the axis of the accommodating member, and the other end. Protrudes toward the axis side of the accommodating member, and a spring member provided with a claw portion that engages with a flange portion provided on the outer peripheral surface of the fuse cylinder when the fuse cylinder is attached to or detached from the high-pressure cutout. ,
The operation rod equipped with. A fixing member fixed to the operation rod body is provided on the base side opposite to the tip of the accommodating member in the axial direction.
The operating rod according to claim 7, wherein the support member and the spring member are arranged in a loosely fitted state between the accommodating member and the fixing member. A plurality of grooves extending in the axial direction are provided on the outer peripheral surface of the cylinder.
The operating rod according to claim 7 or 8, wherein the spring member is housed in the groove.

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