JP2023050907A - Operation rod - Google Patents

Abstract

To provide an operation rod capable of surely attaching/detaching a fuse tube.SOLUTION: An operation rod is an operation rod for attaching/detaching a fuse tube to be used for high-voltage cutout. The operation rod includes: an operation rod body; a cylindrical housing member fixed on the tip of the operation rod body and capable of housing an end of the fuse tube; a support member surrounding an outer peripheral surface of the housing member and attached to the outer peripheral surface of the operation rod body in a loose-fit state; and a plurality of spring members each of which is arranged between the housing member and the support member and held in a loose-fit state from the housing member so that one end is projected from the tip of the housing member in an axial direction in which the axis of the housing member is extended. Further, provided is a claw projected to the axial line side of the housing member and allowed to be engaged with a flange formed on the outer peripheral surface of the fuse tube when attaching/detaching the fuse tube in a high voltage cutout state.SELECTED DRAWING: Figure 2

Description

This specification discloses a technique related to an operating rod for attaching and detaching a fuse cylinder used in a high voltage cutout.

High voltage cutouts are used to protect transformers and the like, with fuse barrels housed in porcelain insulators. When opening/closing a distribution line or replacing a fuse cylinder, an operator attaches or detaches the fuse cylinder using an operating rod in order to ensure safety and ease of work. Patent Literature 1 discloses an operating rod provided with an elastic plate that can be engaged with a fuse cylinder. The operating rod disclosed in Patent Document 1 has a claw portion at the tip of the elastic plate. When attaching the fuse cylinder to the high-voltage cutout, press the operating rod against the fuse cylinder, engage the pawl with the flange provided on the fuse cylinder, and attach the fuse cylinder to the high-voltage cutout while fixing the fuse cylinder to the operating rod. Insert into cutout. After the fuse cylinder is installed in the specified position of the high-voltage cutout, when the operating rod is pressed against the fuse cylinder, the elastic plate deforms (opens outward) and the claw and flange disengage (the operating rod separated from the fuse barrel). When the fuse cylinder is removed from the high voltage cutout, the operating rod is pressed against the fuse cylinder to engage the claw portion with the fuse cylinder, and the fuse cylinder is pulled out from the high voltage cutout while the fuse cylinder is fixed to the operating rod.

Japanese Utility Model Publication No. 35-17063

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

The operation rod disclosed in this specification is an operation rod for attaching and detaching a fuse cylinder used in a high-pressure cutout, and is fixed to an operation rod main body and the tip of the operation rod main body, and an end of the fuse cylinder. a support member that surrounds the outer periphery of the storage member and is attached to the outer periphery of the operating rod main body in a loosely fitted state; One end protrudes from the tip of the housing member in the axial direction along which the axis of the housing member extends, and the other end extends toward the axis of the housing member. A spring member may be provided projecting toward and having a pawl that engages a collar on the outer peripheral surface of the fuse barrel when the fuse barrel is inserted into or removed from the high voltage cutout.

Fig. 3 shows a cross-sectional view of a high pressure cutout; Fig. 2 shows a partial cross-sectional view of the operating rod of the first embodiment; Fig. 3 shows a cross-sectional view of a spring member; 1 shows a perspective view of a support member of the first embodiment; FIG. Fig. 3 shows a perspective view of the receiving member; FIG. 4 is a perspective view for explaining a state in which an operating rod is attached to a fuse cylinder; FIG. 11 shows a partial cross-sectional view of the operating rod of the second embodiment; The perspective view of the cylinder of 2nd Example is shown. Fig. 4 shows a perspective view of a support member of a second embodiment;

(high pressure cutout)
The high voltage cutout is connected between the distribution line and equipment, such as a transformer, via an external wire. The high voltage cutout includes a porcelain cylindrical body insulator and a fuse barrel housed within the body insulator. High pressure cutouts are sometimes referred to as cylindrical cutouts. The fuse barrel can be removed from the high voltage cutout. When the fuse cylinder is inserted into the main body insulator, 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 insulator (to open 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 melts, the distribution line and Power lines between equipment are interrupted. If the fuse element is blown, the distribution line and the device can be reconnected by replacing the fuse cylinder.

(Operating rod)
The operating rod is used to attach and detach the fuse barrel from the high voltage cutout. The operating rod includes an operating rod main body, a cylindrical containing member fixed to the tip of the operating rod main body, a supporting member surrounding the outer circumference of the containing member, and arranged between the containing member and the supporting member. A spring member may be provided. In the following description, with respect to each of the above-described members (accommodating member, support member, and spring member), the side positioned 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 lower side may be referred to as the base side.

The receiving member is capable of receiving the end of the fuse barrel when the fuse barrel is removed from or removed from the high voltage cutout. The containment member may be cylindrical. Further, an engaging portion that protrudes toward the axis (center axis) of the housing member may be provided on the inner peripheral surface of the housing member on the distal end side. The engaging portion is formed to extend in the circumferential direction of the housing member, and may be formed in a part of the housing member in the circumferential direction. That is, the inner peripheral surface of the housing member may be provided with a portion where the engaging portion is formed and a portion where the engaging portion is not formed. A plurality of engaging portions may be provided on the inner peripheral surface of the housing member. When a plurality of engaging portions are provided on the inner peripheral surface of the housing member, the respective engaging portions may be arranged at regular intervals in the circumferential direction of the housing member. When the two engaging portions are provided on the housing member, the two engaging portions may be provided at symmetrical positions with respect to the axis of the housing member.

The engaging portion engages a protrusion provided on the outer peripheral surface of the fuse barrel when the fuse barrel is removed from the high voltage cutout. More specifically, when removing the fuse tube from the high voltage cutout, first, the receiving member is attached to the end of the fuse tube so that the projecting portion of the fuse tube passes through the portion of the receiving member where the engaging portion is not provided. insert Next, the operating rod is rotated so that the engaging portion faces the projecting 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 tube is pulled out, and the fuse tube can be reliably held in the housing member. When the fuse barrel is removed from the high voltage cutout, the fuse barrel and operating rod are prevented from separating, and the fuse barrel can be safely removed from the high pressure cutout.

The support member may be loosely attached to the outer periphery of the operating rod main body so as to surround the outer periphery of the housing member. When the housing member is fixed to the operating rod main body, the support member is loosely fitted to the housing member as well. The support member may be provided with a reduced-diameter portion having an inner diameter smaller than that of the other portions at the end on the base side. Further, a fixing member may be fixed to the operating rod main body on the base side of the housing member. The fixing member may be fixed to the operating rod body such that a gap is provided in the axial direction between the axial distal end of the fixing member and the axial base end of the housing member. Then, the support member may be attached to the operating rod main body so that the diameter-reduced portion of the support member is located in the gap between the fixing member and the housing member. In this case, the gap between the fixing member and the housing member may be 0.2 mm to 1 mm larger than the thickness (length in the axial direction) of the reduced diameter portion. Thereby, the support member can move in the axial direction with respect to the operating rod main body and the housing member. Also, the inner diameter of the diameter-reduced portion may be larger than the outer diameter of the operating rod main body. As described above, the support member is loosely fitted without being fixed to the housing member, and is attached to the operating rod main body so as to surround the outer circumference of the housing member. Therefore, the support member is rotatable with respect to the operating rod main body and the housing member. It can be understood that the support member is attached to the operating rod main body in a state that it is axially movable and rotatable with respect to the operating rod main body and the housing 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 may accommodate the spring member from its proximal end to its axially intermediate portion. In other words, from the base side end of the spring member to the intermediate portion in the axial direction, the groove portion of the support member is fitted. The spring member is not accommodated (fitted) in the groove from the tip side end to the intermediate portion. As noted above, the spring member is positioned between the receiving member and the support member. By forming a groove on the inner peripheral surface of the support member and housing the spring member in the groove, it is possible to reduce the gap between the housing member and the support member. A portion of the spring member that is accommodated (fitted) in the groove of the support member is restricted from deformation 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 accommodated in the groove of the support member functions as a "spring".

Further, an inner peripheral surface on the tip side of the support member may be provided with an inclined portion in which the inner diameter increases toward the end in the axial direction (the tip end). Specifically, the inclined portion may be provided closer to the tip side of the support member than the position where the groove portion described above is provided. The slope and groove 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 and the inclined portion, the spring member functions as a "spring" on the tip side rather than the position facing the base side end of the inclined portion (the tip side end of the groove).

The spring member may be arranged between the housing member and the support member so as to be loosely fitted in the housing member and the operating rod main body. As described above, the support member is rotatable with respect to the operating rod body and housing member. Therefore, when part of the spring member is accommodated in the groove of the support member, the spring member can also rotate with respect to the operating rod main body and the accommodation member. Further, a claw portion protruding toward the axis side of the containing member may be provided on the tip side (one end portion) of the spring member. The pawl engages a collar provided on the outer peripheral surface of the fuse barrel when the fuse barrel is attached to or detached from the high voltage cutout. When the fuse cylinder is attached to or detached from the high-voltage cutout, the fuse cylinder can be fixed to the operating rod (accommodating member) by supporting the flange of the fuse cylinder with the claw. The claw (one end of the spring member) may protrude in the axial direction from the tip of the housing member. Further, the base side end of the spring member (the other end of the spring member) may be provided with a restricting portion that is bent toward the axis. By providing the restricting portion, the restricting portion comes into contact with the base-side end face of the housing member, and it is possible to restrict the movement of the spring member in the axial direction. In other words, by providing the restricting portion, it is possible to prevent the spring member from coming off from between the housing member and the support member.

(high pressure cutout)
Referring to FIG. 1, a high pressure cutout 100 will be described. High voltage cutouts 100 are provided on distribution lines and are used to protect equipment such as transformers. The high-voltage cutout 100 includes a main 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 electrode connected to the equipment side. It has two electrodes 46 and a fuse barrel 12 connecting the first electrode 56 and the second electrode 46 . The main body insulator 8 is cylindrical and has a plurality of insulation folds 14 on its outer peripheral surface. A columnar first chamber 4 and a columnar second chamber 20 having a larger diameter than the first chamber 4 are formed in the main body insulator 8 . A cylindrical arc extinguishing tube 6 is arranged in the first chamber 4 . The fuse tube 12 is arranged inside the arc-extinguishing tube 6 . The high-pressure cutout 100 is installed with the first chamber 4 on the top and the second chamber 20 on the bottom in the direction of gravity. A first electrode 56 is arranged in the first chamber 4 and a 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 side of the first electrode 56 will be referred to as "upper", "upper", etc., and the side of the second electrode 46 will be referred to as "lower", "lower", etc. Sometimes. It should be noted that the first electrode 56 can be considered the top electrode of the high voltage cutout 100 and the second electrode 46 can be considered the bottom electrode of the high voltage cutout 100 .

A conical upper mold cone 2 is fixed to the upper portion of the main body insulator 8 with an adhesive. A lead wire of the upper mold cone 2 is connected to a distribution line. A conical lower mold cone 28 is fixed to the lower side wall 24 of the main body insulator 8 with an adhesive. A lead 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 tube 12 includes an insulating tube 50 containing the fuse 10, an upper contactor 52 provided on the upper portion of the insulating tube 50, a lower contactor 48 provided on the lower portion of the insulating tube 50, and a lower portion. A display tube 58 provided below the contactor 48 is provided. Top contact 52 is connected to first electrode 56 and bottom contact 48 is connected to second electrode 46 . A buffer member 18 is arranged between the lower contactor 48 and the upper surface of the second chamber. A flange portion 26 and a projecting portion 42 are provided on the side surface of the fuse cylinder 12 below the lower contactor 48 . The collar portion 26 extends around the fuse cylinder 12, and two projecting portions 42 are provided at angular intervals of 180 degrees in the circumferential direction. In addition, the display tube 58 is fixed to the insulating tube 50 . On the other hand, the lower contactor 48 is vertically displaceable 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 within an insulating cylinder 50 and a fuse lead wire 40 connected to the fuse element 16 . The fuse lead wire 40 is folded upward outside the display cylinder 58 from the lower end of the display cylinder 58 and is fastened to a clamping screw 60 attached to the lower contactor 48 . A spring 44 is arranged between the lower contact 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, by tightening the fuse lead 40 onto the clamp screw 60, the spring 44 is compressed.

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 with an adhesive 36 . The cover member 34 has a cylindrical shape with a bottom, and includes a shaft portion 34a, a flange 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. The collar portion 34b is provided at a vertically intermediate portion of the shaft portion 34a, protrudes radially outward, and extends 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 projecting portion 34c projecting downward with respect to the opening/closing portion 32. As shown in FIG. The opening/closing portion 32 is protected by the projecting portion 34c. Note that the lid member 34 (including the opening/closing portion 32) is made of an elastic material such as rubber or soft synthetic resin. Fragmented pieces (not shown) such as insulators are fixed to the inner wall 30 to form fine protrusions. 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 radial cuts 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 part 32, the opening/closing part 32 is deformed to open. 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) by providing the notch 32a to open and close.

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 attaching the cover member 34 , the shaft portion 34 a is inserted into the second chamber 20 until the upper surface of the flange portion 34 b contacts the opening portion 38 . Thereby, the lid member 34 is positioned with respect to the main body insulator 8 . When the cover member 34 is inserted into the second chamber 20 , the gap between the outer peripheral surface of the shaft portion 34 a and the inner wall 30 is filled with the adhesive 36 , thereby fixing the cover member 34 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 blows when a current exceeding a specified value flows through the distribution path in which the high voltage cutout 100 is located. 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 remains connected to the second electrode 46 . When the fuse tube 12 moves downward, the display tube 58 is exposed from the cover member 34 (opening/closing portion 32 ) to the lower portion of the high voltage cutout 100 . That is, by confirming whether or not the display cylinder 58 is exposed under the high voltage cutout 100, it is possible to determine whether or not the fuse element 16 is melted (whether or not the fuse cylinder 12 needs to be replaced). Note that the lower contact 48 continues to be connected (fixed) to the second electrode 46 even if the fuse element 16 is blown. Therefore, the fuse cylinder 12 (display cylinder 58) moves downward due to the elastic force of the spring 44 and gravity, but is prevented from falling from the high voltage cutout 100. FIG.

When the fuse element 16 is melted (the display cylinder 58 is exposed from the main insulator 8), the fuse cylinder 12 is pulled out from the main insulator 8 in order to replace the fuse cylinder 12. - 特許庁When opening a distribution line in which the high-voltage cutout 100 is arranged (releasing the load) due to construction or the like, the operation rod 70 must be 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 pull out the fuse cylinder 12 from the main body insulator 8 . In this case, an arc is generated between the upper contact 52 and the first electrode 56 when the fuse cylinder 12 is pulled out. However, arc heat melts part of the arc-extinguishing rod 54 and the arc-extinguishing tube 6 to generate an arc-extinguishing gas, which extinguishes the arc. When inserting the fuse cylinder 12 into the main body insulator 8 , the fuse cylinder 12 is inserted inside the lid member 34 from the bottom surface 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 extracting the fuse cylinder 12 from the main body insulator 8 (attaching and detaching the fuse cylinder 12 with respect to the high voltage cutout 100). The operating rod 70 will be described below.

(Operating rod: 1st embodiment)
The operating rod 70 will be described with reference to FIG. As shown in FIG. 2 , the operating rod 70 is rod-shaped and extends in the direction of the axis 72 of the housing member 86 . The operating rod 70 includes an operating rod main body 74 and a detachable portion 80 provided at the tip of the operating rod main body 74 (one end in the direction of the axis 72). The operating rod main body 74 is cylindrical. The detachable portion 80 includes a housing member 76 fixed to the operating rod main body 74 , a supporting member 84 loosely fitted to the operating rod main body 74 , and an operating rod main body between the housing member 86 and the supporting member 84 . A spring member 90 loosely fitted to 74, a fixing member 76 fixed to the operating rod body 74 on the base side of the housing member 86, and a protective member 82 fixed to the fixing member. there is The housing member 86 is screwed to the operating rod main body 74 . Specifically, a male thread (not shown) is provided on the outer peripheral surface of the operating rod main body 74 , and a female thread (not shown) is provided on the inner peripheral surface of the housing member 86 . 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 while applying an adhesive to (the part where the female thread is provided). Details of the housing member 86 will be described later. Also, the fixing member 76 is fixed to the operating rod main body 74 by a fixing screw 75 . A gap is provided between the fixing member 76 and the housing member 86 in the direction of the axis 72 .

The support member 84 has a cylindrical shape, and is provided with an inclined portion 84b on the distal end side and a reduced diameter portion 84a whose inner diameter is smaller than that of the other portions on the base side. A portion of the support member 84 where the reduced-diameter portion 84 a is not provided surrounds the outer periphery of the housing member 86 . When attaching the support member 84 to the operating rod main body 74 , the reduced diameter portion 84 a side is inserted into the operating rod main body 74 . The diameter-reduced portion 84 a surrounds the outer periphery of the operating rod main body 74 and is located between the fixing member 76 and the housing member 86 in the direction of the axis 72 . The support member 84 is not fixed to the operating rod main body 74 and the housing member 86 . Therefore, the support member 84 is movable in the direction of the axis 72 and rotatable with respect to the operating rod main body 74 and the housing member 86 . However, since the diameter-reduced portion 84a is located between the fixed member 76 and the housing member 86, the diameter-reduced portion 84a contacts the fixed member 76 and the housing member 86 when the support member 84 moves in the direction of the axis 72. . Therefore, the support member 84 does not come off the operating 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 protection member 82 is fixed to the fixing member 76 . Specifically, a male thread (not shown) is provided on the outer peripheral surface of the fixing member 76, a female thread (not shown) is provided on the inner peripheral surface of the protective member 82, and an inner peripheral surface (not shown) of the protective member 82 is provided. The protective member 82 is fixed to the fixing member 76 by screwing the protective member 82 into the fixing member 76 in a state in which an adhesive is applied to the portion where the internal thread is provided. The protective member 82 surrounds the outer circumference of the support member 84 and protects the support member 84, the spring member 90 and the fixed member 76.

3 to 5, the spring member 90, support member 84 and housing member 86 will be described. As shown in FIG. 3, the spring member 90 includes a linear portion 90b, a claw portion 90c provided on one end side (tip side), and a restricting portion 90a provided on the other end side (base side). (see also Figure 2). The restriction 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 in the same direction as the restricting portion 90a with respect to the linear portion 90b. More specifically, the base side of the claw portion 90c is inclined with respect to the linear portion 90b. The distal end side of the claw portion 90c is bent (inclined) with respect to the linear portion 90b in the direction opposite to the restricting portion 90a. The inclination angles of the claw portions 90c (base side and tip side) with respect to the linear portion 90b are adjusted within a range of 100 degrees to 150 degrees. For example, both inclination angles of the claw portion 90c with respect to the linear portion 90b are approximately 120 degrees. An end portion 90e on the one end side of the claw portion 90c is bent 180 degrees.

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

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

Returning to FIG. 2, features of the operating rod 70 will be further described. The spring member 90 is attached to the support member 84 so that the tip of the restricting portion 90a (see also FIG. 3) faces the axis 72 direction. As a result, the restricting portion 90a is formed between the diameter-reduced portion 84a of the support member 84 and the base-side end surface 86e of the housing member 86, and between the diameter-reduced portion 84a of the support member 84 and the base-side end surface 85a of the tubular body 85. Located in Further, the linear portion 90b of the spring member 90 is positioned between the inner surface of the support member 84 and the outer surface of the tubular body 85 (accommodating member). This can prevent the spring member 90 from coming off the operating rod main body 74 . That is, even if a force to move the spring member 90 in the direction of the axis 72 is applied, the restricting portion 90a contacts the support member 84 (reduced diameter portion 84a), the accommodating member 86, or the cylindrical body 85, so that the movement of the spring member 90 is prevented. It is restricted, and the spring member 90 does not come off from the housing member 86 (operating rod main body 74). Further, even if a force to move the spring member 90 in the radial direction (direction orthogonal to the axis 72) is applied, the linear portion 90b of the spring member 90 contacts the inner surface of the support member 84 or the outer surface of the cylindrical body 85, , the restricting portion 90a contacts the containing member 86 and/or the cylindrical body 85, so that the spring member 90 does not come off from the containing member 86 (operating rod main body 74).

In addition, since the claw portion 90c is bent in the same direction as the restricting portion 90a with respect to the linear portion 90b, when observed from the direction of the axis 72, the tip of the claw portion 90c is located in the direction of the axis 72 rather than the inner peripheral surface of the housing member 86. located on the side. In other words, a circle (virtual circle) formed by connecting the tips of the claw portions 90c is located inside the inner peripheral surface of the housing member 86. As shown in FIG. Note that 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. As shown in FIG. That is, in the radial direction of the detachable portion 80 , the claw portion 90 c is surrounded by the protective member 82 and the end portion 90 e is not surrounded by the protective member 82 . Therefore, when the tip 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 ensured.

The linear portion 90b of the spring member 90 is accommodated in the groove portion 84c of the support member 84 on the base side (regulating portion 90a side), and is not accommodated in the groove portion 84c on the tip side (claw portion 90c side). The support member 84 is provided with an inclined portion 84b, and a portion of the tip side of the linear portion 90b is surrounded by the inclined portion 84b. Therefore, when the linear portion 90b of the spring member 90 is deformed (when the spring member 90 expands radially outward), the linear portion 90b can be smoothly deformed (deformation of the linear portion 90b is hindered by the support member 84). not be done). As described above, the support member 84 is rotatable with respect to the operating rod main body 74 and the housing member 86 . Also, the spring member 90 is fixed (fitted) to the support member 84 . Therefore, the spring member 90 is also rotatable with respect to the operating rod main body 74 and the housing member 86 . In other words, the operating rod body 74 and housing member 86 are rotatable with respect to the support member 84 and spring member 90 .

A method for attaching and 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 (on the display tube 58 side) of the fuse tube 12 is pushed into the housing member 86 to engage the flange portion 26 of the fuse tube 12 with the claw portion 90c of the spring member 90 . When the fuse cylinder 12 is pushed into the housing member 86, the flange portion 26 of the fuse cylinder 12 collides with the spring member 90 (claw portion 90c), and the spring member 90 (linear portion 90b) is elastically deformed radially outward. When the collar portion 26 passes over the top of the claw portion 90 c , the spring member 90 returns to its shape before being elastically deformed, and the claw portion 90 c engages with the collar portion 26 . When the fuse cylinder 12 is pushed into the housing member 86, the end of the fuse cylinder 12 is housed so that the projecting portion 42 of the fuse cylinder 12 passes through the portion of the housing member 86 where the engaging portion 86a is not provided. push into 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, clamps the upper contact 52 between the first electrodes 56, and connects the upper contact 52 and the first electrode 56. After connecting the lower contact 48 to the second electrode 46 and connecting the two, the operating rod 70 is pulled downward (see also FIG. 1). When the operating rod 70 is pulled out, the fuse cylinder 12 is held in the high-voltage cutout 100 by the clamping force of the first electrode 56 and the clamping force of the second electrode 46 , so that the spring member 90 is elastically deformed so that the flange portion 26 and the fuse cylinder 12 are held. The fuse cylinder 12 and the operating rod 70 can be separated in a state in which the claw portion 90c is disengaged and the fuse cylinder 12 remains on the main body insulator 8 .

When extracting the fuse cylinder 12 from the high voltage cutout 100 , the operator pushes the end of the fuse cylinder 12 into the receiving member 86 in the same manner as when attaching the fuse cylinder 12 to the high voltage cutout 100 . After the claw portion 90c of the spring member 90 is engaged with the flange portion 26 of the fuse cylinder 12, the operator pushes the operation rod 70 (operation rod main body 74) while maintaining the engagement between the claw portion 90c and the flange portion 26. rotate. Specifically, the operating rod 70 is rotated so that the projecting portion 42 of the fuse cylinder 12 faces the engaging portion 86 a of the housing member 86 . As a result, the projecting portion 42 engages with the engaging portion 86a. When the operating rod 70 is rotated, the projecting portion 42 of the fuse cylinder 12 contacts the stopper 87 and the operating rod 70 cannot be rotated. can recognize what you have done. After engaging the projecting portion 42 with the engaging portion 86 a , the operating rod 70 is moved downward, and the fuse cylinder 12 is pulled out from the high-voltage cutout 100 . Since the protruding portion 42 and the engaging portion 86a are engaged with each other, the fuse cylinder 12 is firmly sandwiched between the body insulators 8, and even if they are firmly connected (the upper contactor 52 and the lower contactor 48 are not connected to each other). The fuse cylinder 12 can be pulled out from the main body insulator 8 without fail even if the first electrode 56 and the lower contactor 48 are firmly sandwiched and firmly connected to each other.

As described above, the operating rod body 74 and housing member 86 are rotatable with respect to the support member 84 and spring member 90 . Therefore, even if the operating rod main body 74 is rotated while the end of the fuse cylinder 12 is housed in the housing 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 extracted from the high-voltage cutout 100, it is possible to prevent the components (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 operating 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 damage to the support member 84 and the spring member 90 can be prevented when the fuse cylinder 12 is inserted into the operation rod 70. FIG.

(Modified example of operating rod: Second embodiment)
Modifications of the operating rod 70 will be described with reference to FIGS. 7 to 9. FIG. In the description of the present embodiment, the same features of the operation rod 70 of the first embodiment are given the same reference numbers as those of the operation rod 70 of the first embodiment, and the description thereof is omitted. There is The operating rod 70 of this embodiment includes a cylindrical body 85 having a plurality of grooves 85b on its outer peripheral surface 85c and a support member 84 having no grooves on its inner peripheral surface (see FIGS. 2 and 3 for comparison). reference).

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

A plurality of grooves 85b are provided on the outer peripheral surface 85c of the cylindrical body 85. As shown in FIG. The groove portion 85b extends from one end in the direction of the axis 72 to the other end. In addition, the outer peripheral surface 85c of the cylindrical body 85 is provided with a convex portion 85d protruding in the radial direction. In the direction of the axis 72 , the convex portion 85 d is provided from the tip end surface of the cylindrical body 85 to the intermediate portion of the cylindrical body 85 . In the outer peripheral surface 85c of the cylindrical body 85, there is a step at the boundary between the portion provided with the convex portion 85d (the tip side of the tube end 85) and the portion not provided with the convex portion 85d (base side of the tube end 85). is provided. The support member 84 is fitted into a portion of the outer peripheral surface 85 of the cylindrical body 85 where the convex portion 85d is not provided. In other words, the support member 84 is such that the projection 85d of the cylindrical body 85 is closer to the operation rod 70 than the tip end face of the support member 84 (the end face opposite to the end face where the reduced diameter portion 84a is provided in the direction of the axis 72). It is fixed to the cylindrical body 85 so as to be located on the tip side of the .

In the operating rod 70 of this embodiment, the linear portion 90b (see FIG. 3) of the spring member 90 is accommodated in the groove portion 85b provided on the outer peripheral surface 85c of the cylinder 85. As shown in FIG. The spring member 90 is not fixed (fitted) in the groove portion 85b. By fixing (fitting) the support member 84 to the outer peripheral surface 85c of the cylindrical body 85, the spring member 90 is configured such that a portion of the linear portion 90b of the spring member 90 (a portion sandwiched between the cylindrical body 85 and the support member 84) is adjusted. is fixed to the cylindrical body 85 . Therefore, the tip side portion of the spring member 90 (the portion provided with the convex portion 85d in the direction of the axis 72) can be deformed in the radial direction. In the operation rod 70 of this embodiment, the spring member 90 is rotatable with respect to the operation rod main body 74 and the housing member 86, similarly to the operation rod 70 of the first embodiment. Therefore, the operating rod 70 of this embodiment can obtain the same effects as the operating 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 the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. In addition, the technical elements described in this specification or in 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 exemplified in this specification or drawings can simultaneously achieve a plurality of purposes, and achieving one of them has technical utility in itself.

12: Fuse cylinder 26: Collar 42: Protruding portion 70: Operating rod 72: Axis of accommodating member 74: Operating rod main body 82: Protective member 84: Support member 84a: Reduced diameter portion 84b: Inclined portion 84c: Groove 85: Cylinder Body 86: Receiving member 86a: Engaging portion 90: Spring member 90c: Claw portion 100: High pressure cutout

Claims (9)

An operating rod for attaching and detaching a fuse cylinder used in a high voltage cutout,
an operating rod body;
a cylindrical housing member fixed to the tip of the operating rod body and capable of housing the end of the fuse tube;
a support member that surrounds the outer periphery of the housing member and is loosely attached to the outer periphery of the operating rod main body;
It is arranged between the housing member and the support member and is loosely fitted to the housing member. protrudes toward the axis of the housing member, and is provided with a claw portion that engages with a flange provided on the outer peripheral surface of the fuse cylinder when the fuse cylinder is attached to or detached from the high-voltage cutout. a spring member;
Operating rod with. A fixing member fixed to the operation rod main body is provided on the base side opposite to the tip of the housing member in the axial direction,
2. The operating rod according to claim 1, wherein the support member and the spring member are loosely fitted between the housing member and the fixed member. At the other end of the spring member on the side opposite to the one end in the axial direction, there is bent in the axial direction and contacts the base side end surface of the housing member to restrict the movement of the spring member in the axial direction. 3. The operating rod according to claim 1 or 2, further comprising a regulating portion for controlling. 4. 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 other portions 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,
5. The operating rod according to any one of claims 1 to 4, wherein a spring member is fitted in said groove. The operating rod according to any one of claims 1 to 5, wherein the support member has a sloping portion, the inner diameter of which increases toward the end in the axial direction, provided on the tip side of the support member. An operating rod for attaching and detaching a fuse cylinder used in a high voltage cutout,
an operating rod body;
a cylindrical housing member fixed to the tip of the operating rod body and capable of housing the end of the fuse tube;
a cylindrical body loosely attached to the outer circumference of the housing member;
a support member fixed to the outer periphery of the cylinder;
It is arranged between the cylindrical body and the support member, is fixed to the cylindrical body, has one end projecting from the tip of the housing member in the axial direction in which the axis of the housing member extends, and the other end. protrudes toward the axis of the containing member, and has 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; ,
Operating rod with. A fixing member fixed to the operation rod main body is provided on the base side opposite to the tip of the housing member in the axial direction,
8. The operating rod according to claim 7, wherein the support member and the spring member are loosely fitted between the housing member and the fixed member. A plurality of grooves extending in the axial direction are provided on the outer peripheral surface of the cylinder,
9. The operating rod according to claim 7, wherein a spring member is accommodated within said groove.

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